openwrt/target/linux/generic/pending-5.15/737-07-net-ethernet-mtk_eth_soc-add-paths-and-SerDes-modes-.patch

From 3d833ad2cfc1ab503d9aae2967b7f10811bb3c9c Mon Sep 17 00:00:00 2001
From: Daniel Golle <[email protected]>
Date: Wed, 1 Mar 2023 11:56:04 +0000
Subject: [PATCH 7/7] net: ethernet: mtk_eth_soc: add paths and SerDes modes 
 for MT7988

MT7988 comes with a built-in 2.5G PHY as well as
USXGMII/10GBase-KR/5GBase-KR compatible SerDes lanes for external PHYs.
Add support for configuring the MAC and SerDes parts for the new paths.

Signed-off-by: Daniel Golle <[email protected]>
---
 drivers/net/ethernet/mediatek/Kconfig        |   7 +
 drivers/net/ethernet/mediatek/Makefile       |   1 +
 drivers/net/ethernet/mediatek/mtk_eth_path.c | 154 +++-
 drivers/net/ethernet/mediatek/mtk_eth_soc.c  | 270 +++++-
 drivers/net/ethernet/mediatek/mtk_eth_soc.h  | 194 ++++-
 drivers/net/ethernet/mediatek/mtk_usxgmii.c  | 835 +++++++++++++++++++
 6 files changed, 1428 insertions(+), 33 deletions(-)
 create mode 100644 drivers/net/ethernet/mediatek/mtk_usxgmii.c

--- a/drivers/net/ethernet/mediatek/Kconfig
+++ b/drivers/net/ethernet/mediatek/Kconfig
@@ -24,6 +24,13 @@ config NET_MEDIATEK_SOC
 	  This driver supports the gigabit ethernet MACs in the
 	  MediaTek SoC family.
 
+config NET_MEDIATEK_SOC_USXGMII
+	bool "Support USXGMII SerDes on MT7988"
+	depends on (ARCH_MEDIATEK && ARM64) || COMPILE_TEST
+	def_bool NET_MEDIATEK_SOC != n
+	help
+	  Include support for 10G SerDes which can be found on MT7988.
+
 config NET_MEDIATEK_STAR_EMAC
 	tristate "MediaTek STAR Ethernet MAC support"
 	select PHYLIB
--- a/drivers/net/ethernet/mediatek/Makefile
+++ b/drivers/net/ethernet/mediatek/Makefile
@@ -5,6 +5,7 @@
 
 obj-$(CONFIG_NET_MEDIATEK_SOC) += mtk_eth.o
 mtk_eth-y := mtk_eth_soc.o mtk_eth_path.o mtk_ppe.o mtk_ppe_debugfs.o mtk_ppe_offload.o
+mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_USXGMII) += mtk_usxgmii.o
 mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed.o mtk_wed_mcu.o mtk_wed_wo.o
 ifdef CONFIG_DEBUG_FS
 mtk_eth-$(CONFIG_NET_MEDIATEK_SOC_WED) += mtk_wed_debugfs.o
--- a/drivers/net/ethernet/mediatek/mtk_eth_path.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_path.c
@@ -31,10 +31,20 @@ static const char *mtk_eth_path_name(u64
 		return "gmac2_rgmii";
 	case MTK_ETH_PATH_GMAC2_SGMII:
 		return "gmac2_sgmii";
+	case MTK_ETH_PATH_GMAC2_2P5GPHY:
+		return "gmac2_2p5gphy";
 	case MTK_ETH_PATH_GMAC2_GEPHY:
 		return "gmac2_gephy";
+	case MTK_ETH_PATH_GMAC3_SGMII:
+		return "gmac3_sgmii";
 	case MTK_ETH_PATH_GDM1_ESW:
 		return "gdm1_esw";
+	case MTK_ETH_PATH_GMAC1_USXGMII:
+		return "gmac1_usxgmii";
+	case MTK_ETH_PATH_GMAC2_USXGMII:
+		return "gmac2_usxgmii";
+	case MTK_ETH_PATH_GMAC3_USXGMII:
+		return "gmac3_usxgmii";
 	default:
 		return "unknown path";
 	}
@@ -42,8 +52,8 @@ static const char *mtk_eth_path_name(u64
 
 static int set_mux_gdm1_to_gmac1_esw(struct mtk_eth *eth, u64 path)
 {
+	u32 val, mask, set, reg;
 	bool updated = true;
-	u32 val, mask, set;
 
 	switch (path) {
 	case MTK_ETH_PATH_GMAC1_SGMII:
@@ -59,10 +69,15 @@ static int set_mux_gdm1_to_gmac1_esw(str
 		break;
 	}
 
+	if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3))
+		reg = MTK_MAC_MISC_V3;
+	else
+		reg = MTK_MAC_MISC;
+
 	if (updated) {
-		val = mtk_r32(eth, MTK_MAC_MISC);
+		val = mtk_r32(eth, reg);
 		val = (val & mask) | set;
-		mtk_w32(eth, val, MTK_MAC_MISC);
+		mtk_w32(eth, val, reg);
 	}
 
 	dev_dbg(eth->dev, "path %s in %s updated = %d\n",
@@ -125,6 +140,31 @@ static int set_mux_u3_gmac2_to_qphy(stru
 	return 0;
 }
 
+static int set_mux_gmac2_to_2p5gphy(struct mtk_eth *eth, u64 path)
+{
+	unsigned int val = 0;
+	bool updated = true;
+	int mac_id = 0;
+
+	regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
+
+	switch (path) {
+	case MTK_ETH_PATH_GMAC2_2P5GPHY:
+		val &= ~(u32)SYSCFG0_SGMII_GMAC2_V2;
+		mac_id = MTK_GMAC2_ID;
+		break;
+	default:
+		updated = false;
+		break;
+	};
+
+	if (updated)
+		regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
+				   SYSCFG0_SGMII_MASK, val);
+
+	return 0;
+}
+
 static int set_mux_gmac1_gmac2_to_sgmii_rgmii(struct mtk_eth *eth, u64 path)
 {
 	unsigned int val = 0;
@@ -163,7 +203,61 @@ static int set_mux_gmac1_gmac2_to_sgmii_
 	return 0;
 }
 
-static int set_mux_gmac12_to_gephy_sgmii(struct mtk_eth *eth, u64 path)
+static int set_mux_gmac123_to_usxgmii(struct mtk_eth *eth, u64 path)
+{
+	unsigned int val = 0;
+	bool updated = true;
+	int mac_id = 0;
+
+	dev_dbg(eth->dev, "path %s in %s updated = %d\n",
+		mtk_eth_path_name(path), __func__, updated);
+
+	/* Disable SYSCFG1 SGMII */
+	regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
+
+	switch (path) {
+	case MTK_ETH_PATH_GMAC1_USXGMII:
+		val &= ~(u32)SYSCFG0_SGMII_GMAC1_V2;
+		mac_id = MTK_GMAC1_ID;
+		break;
+	case MTK_ETH_PATH_GMAC2_USXGMII:
+		val &= ~(u32)SYSCFG0_SGMII_GMAC2_V2;
+		mac_id = MTK_GMAC2_ID;
+		break;
+	case MTK_ETH_PATH_GMAC3_USXGMII:
+		val &= ~(u32)SYSCFG0_SGMII_GMAC3_V2;
+		mac_id = MTK_GMAC3_ID;
+		break;
+	default:
+		updated = false;
+	};
+
+	if (updated) {
+		regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
+				   SYSCFG0_SGMII_MASK, val);
+
+		if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3) &&
+		    mac_id == MTK_GMAC2_ID) {
+			regmap_update_bits(eth->infra,
+					   TOP_MISC_NETSYS_PCS_MUX,
+					   NETSYS_PCS_MUX_MASK,
+					   MUX_G2_USXGMII_SEL);
+		}
+	}
+
+	/* Enable XGDM Path */
+	val = mtk_r32(eth, MTK_GDMA_EG_CTRL(mac_id));
+	val |= MTK_GDMA_XGDM_SEL;
+	mtk_w32(eth, val, MTK_GDMA_EG_CTRL(mac_id));
+
+	dev_dbg(eth->dev, "path %s in %s updated = %d\n",
+		mtk_eth_path_name(path), __func__, updated);
+
+
+	return 0;
+}
+
+static int set_mux_gmac123_to_gephy_sgmii(struct mtk_eth *eth, u64 path)
 {
 	unsigned int val = 0;
 	bool updated = true;
@@ -180,6 +274,9 @@ static int set_mux_gmac12_to_gephy_sgmii
 	case MTK_ETH_PATH_GMAC2_SGMII:
 		val |= SYSCFG0_SGMII_GMAC2_V2;
 		break;
+	case MTK_ETH_PATH_GMAC3_SGMII:
+		val |= SYSCFG0_SGMII_GMAC3_V2;
+		break;
 	default:
 		updated = false;
 	}
@@ -208,13 +305,25 @@ static const struct mtk_eth_muxc mtk_eth
 		.cap_bit = MTK_ETH_MUX_U3_GMAC2_TO_QPHY,
 		.set_path = set_mux_u3_gmac2_to_qphy,
 	}, {
+		.name = "mux_gmac2_to_2p5gphy",
+		.cap_bit = MTK_ETH_MUX_GMAC2_TO_2P5GPHY,
+		.set_path = set_mux_gmac2_to_2p5gphy,
+	}, {
 		.name = "mux_gmac1_gmac2_to_sgmii_rgmii",
 		.cap_bit = MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII,
 		.set_path = set_mux_gmac1_gmac2_to_sgmii_rgmii,
 	}, {
 		.name = "mux_gmac12_to_gephy_sgmii",
 		.cap_bit = MTK_ETH_MUX_GMAC12_TO_GEPHY_SGMII,
-		.set_path = set_mux_gmac12_to_gephy_sgmii,
+		.set_path = set_mux_gmac123_to_gephy_sgmii,
+	}, {
+		.name = "mux_gmac123_to_gephy_sgmii",
+		.cap_bit = MTK_ETH_MUX_GMAC123_TO_GEPHY_SGMII,
+		.set_path = set_mux_gmac123_to_gephy_sgmii,
+	}, {
+		.name = "mux_gmac123_to_usxgmii",
+		.cap_bit = MTK_ETH_MUX_GMAC123_TO_USXGMII,
+		.set_path = set_mux_gmac123_to_usxgmii,
 	},
 };
 
@@ -243,16 +352,46 @@ static int mtk_eth_mux_setup(struct mtk_
 		}
 	}
 
+	dev_dbg(eth->dev, "leaving mux_setup %s\n",
+		mtk_eth_path_name(path));
+
 out:
 	return err;
 }
 
+int mtk_gmac_usxgmii_path_setup(struct mtk_eth *eth, int mac_id)
+{
+	u64 path;
+
+	path = (mac_id == MTK_GMAC1_ID) ?  MTK_ETH_PATH_GMAC1_USXGMII :
+	       (mac_id == MTK_GMAC2_ID) ?  MTK_ETH_PATH_GMAC2_USXGMII :
+					   MTK_ETH_PATH_GMAC3_USXGMII;
+
+	/* Setup proper MUXes along the path */
+	return mtk_eth_mux_setup(eth, path);
+}
+
 int mtk_gmac_sgmii_path_setup(struct mtk_eth *eth, int mac_id)
 {
 	u64 path;
 
-	path = (mac_id == 0) ?  MTK_ETH_PATH_GMAC1_SGMII :
-				MTK_ETH_PATH_GMAC2_SGMII;
+	path = (mac_id == MTK_GMAC1_ID) ? MTK_ETH_PATH_GMAC1_SGMII :
+	       (mac_id == MTK_GMAC2_ID) ? MTK_ETH_PATH_GMAC2_SGMII :
+					  MTK_ETH_PATH_GMAC3_SGMII;
+
+	/* Setup proper MUXes along the path */
+	return mtk_eth_mux_setup(eth, path);
+}
+
+int mtk_gmac_2p5gphy_path_setup(struct mtk_eth *eth, int mac_id)
+{
+	u64 path = 0;
+
+	if (mac_id == MTK_GMAC2_ID)
+		path = MTK_ETH_PATH_GMAC2_2P5GPHY;
+
+	if (!path)
+		return -EINVAL;
 
 	/* Setup proper MUXes along the path */
 	return mtk_eth_mux_setup(eth, path);
@@ -282,4 +421,3 @@ int mtk_gmac_rgmii_path_setup(struct mtk
 	/* Setup proper MUXes along the path */
 	return mtk_eth_mux_setup(eth, path);
 }
-
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -437,6 +437,23 @@ static void mtk_gmac0_rgmii_adjust(struc
 	mtk_w32(eth, val, TRGMII_TCK_CTRL);
 }
 
+static void mtk_setup_bridge_switch(struct mtk_eth *eth)
+{
+	int val;
+
+	/* Force Port1 XGMAC Link Up */
+	val = mtk_r32(eth, MTK_XGMAC_STS(MTK_GMAC1_ID));
+	mtk_w32(eth, val | MTK_XGMAC_FORCE_LINK(MTK_GMAC1_ID),
+		MTK_XGMAC_STS(MTK_GMAC1_ID));
+
+	/* Adjust GSW bridge IPG to 11*/
+	val = mtk_r32(eth, MTK_GSW_CFG);
+	val &= ~(GSWTX_IPG_MASK | GSWRX_IPG_MASK);
+	val |= (GSW_IPG_11 << GSWTX_IPG_SHIFT) |
+	       (GSW_IPG_11 << GSWRX_IPG_SHIFT);
+	mtk_w32(eth, val, MTK_GSW_CFG);
+}
+
 static struct phylink_pcs *mtk_mac_select_pcs(struct phylink_config *config,
 					      phy_interface_t interface)
 {
@@ -451,6 +468,12 @@ static struct phylink_pcs *mtk_mac_selec
 		       0 : mac->id;
 
 		return eth->sgmii_pcs[sid];
+	} else if ((interface == PHY_INTERFACE_MODE_USXGMII ||
+		    interface == PHY_INTERFACE_MODE_10GKR ||
+		    interface == PHY_INTERFACE_MODE_5GBASER) &&
+		   MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3) &&
+		   mac->id != MTK_GMAC1_ID) {
+			return mtk_usxgmii_select_pcs(eth, mac->id);
 	}
 
 	return NULL;
@@ -462,7 +485,7 @@ static void mtk_mac_config(struct phylin
 	struct mtk_mac *mac = container_of(config, struct mtk_mac,
 					   phylink_config);
 	struct mtk_eth *eth = mac->hw;
-	int val, ge_mode, err = 0;
+	int val, ge_mode, force_link, err = 0;
 	u32 i;
 
 	/* MT76x8 has no hardware settings between for the MAC */
@@ -506,6 +529,23 @@ static void mtk_mac_config(struct phylin
 					goto init_err;
 			}
 			break;
+		case PHY_INTERFACE_MODE_USXGMII:
+		case PHY_INTERFACE_MODE_10GKR:
+		case PHY_INTERFACE_MODE_5GBASER:
+			if (MTK_HAS_CAPS(eth->soc->caps, MTK_USXGMII)) {
+				err = mtk_gmac_usxgmii_path_setup(eth, mac->id);
+				if (err)
+					goto init_err;
+			}
+			break;
+		case PHY_INTERFACE_MODE_INTERNAL:
+			if (mac->id == MTK_GMAC2_ID &&
+			    MTK_HAS_CAPS(eth->soc->caps, MTK_2P5GPHY)) {
+				err = mtk_gmac_2p5gphy_path_setup(eth, mac->id);
+				if (err)
+					goto init_err;
+			}
+			break;
 		default:
 			goto err_phy;
 		}
@@ -584,14 +624,78 @@ static void mtk_mac_config(struct phylin
 				   SYSCFG0_SGMII_MASK,
 				   ~(u32)SYSCFG0_SGMII_MASK);
 
+		if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3)) {
+			mtk_xfi_pll_enable(eth);
+			mtk_sgmii_reset(eth, mac->id);
+			if (phylink_autoneg_inband(mode))
+				mtk_sgmii_setup_phya_gen1(eth, mac->id);
+			else
+				mtk_sgmii_setup_phya_gen2(eth, mac->id);
+		}
 		/* Save the syscfg0 value for mac_finish */
 		mac->syscfg0 = val;
-	} else if (phylink_autoneg_inband(mode)) {
+	} else if (state->interface != PHY_INTERFACE_MODE_USXGMII &&
+		   state->interface != PHY_INTERFACE_MODE_10GKR &&
+		   state->interface != PHY_INTERFACE_MODE_5GBASER &&
+		   phylink_autoneg_inband(mode)) {
 		dev_err(eth->dev,
-			"In-band mode not supported in non SGMII mode!\n");
+			"In-band mode not supported in non-SerDes modes!\n");
 		return;
 	}
 
+	/* Setup gmac */
+	if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3) &&
+	    (mtk_interface_mode_is_xgmii(state->interface) ||
+	     mac->interface == PHY_INTERFACE_MODE_INTERNAL)) {
+		mtk_w32(mac->hw, MTK_GDMA_XGDM_SEL, MTK_GDMA_EG_CTRL(mac->id));
+		mtk_w32(mac->hw, MAC_MCR_FORCE_LINK_DOWN, MTK_MAC_MCR(mac->id));
+
+		switch (mac->id) {
+		case MTK_GMAC1_ID:
+			mtk_setup_bridge_switch(eth);
+			break;
+		case MTK_GMAC2_ID:
+			force_link = (mac->interface ==
+				      PHY_INTERFACE_MODE_INTERNAL) ?
+				      MTK_XGMAC_FORCE_LINK(mac->id) : 0;
+			val = mtk_r32(eth, MTK_XGMAC_STS(mac->id));
+			mtk_w32(eth, val | force_link,
+				MTK_XGMAC_STS(mac->id));
+			break;
+		case MTK_GMAC3_ID:
+			val = mtk_r32(eth, MTK_XGMAC_STS(mac->id));
+			mtk_w32(eth, val | MTK_XGMAC_FORCE_LINK(mac->id),
+				MTK_XGMAC_STS(mac->id));
+			break;
+		}
+	} else {
+		val = mtk_r32(eth, MTK_GDMA_EG_CTRL(mac->id));
+		mtk_w32(eth, val & ~MTK_GDMA_XGDM_SEL,
+			MTK_GDMA_EG_CTRL(mac->id));
+
+		if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3)) {
+			switch (mac->id) {
+			case MTK_GMAC2_ID:
+			case MTK_GMAC3_ID:
+				val = mtk_r32(eth, MTK_XGMAC_STS(mac->id));
+				mtk_w32(eth,
+					val & ~MTK_XGMAC_FORCE_LINK(mac->id),
+					MTK_XGMAC_STS(mac->id));
+				break;
+			}
+		}
+
+/*
+		if (mac->type != mac_type) {
+			if (atomic_read(&reset_pending) == 0) {
+				atomic_inc(&force);
+				schedule_work(&eth->pending_work);
+				atomic_inc(&reset_pending);
+			} else
+				atomic_dec(&reset_pending);
+		}
+*/
+	}
 	return;
 
 err_phy:
@@ -632,11 +736,40 @@ static int mtk_mac_finish(struct phylink
 	return 0;
 }
 
-static void mtk_mac_pcs_get_state(struct phylink_config *config,
+static void mtk_xgdm_pcs_get_state(struct mtk_mac *mac,
+				  struct phylink_link_state *state)
+{
+	u32 sts = mtk_r32(mac->hw, MTK_XGMAC_STS(mac->id));
+
+	if (mac->id == MTK_GMAC2_ID)
+		sts = sts >> 16;
+
+	state->link = FIELD_GET(MTK_USXGMII_PCS_LINK, sts);
+	if (!state->link)
+		return;
+
+	state->duplex = DUPLEX_FULL;
+	state->interface = mac->interface;
+
+	switch (FIELD_GET(MTK_USXGMII_PCS_MODE, sts)) {
+	case 0:
+		state->speed = SPEED_10000;
+		break;
+	case 1:
+		state->speed = SPEED_5000;
+		break;
+	case 2:
+		state->speed = SPEED_2500;
+		break;
+	case 3:
+		state->speed = SPEED_1000;
+		break;
+	}
+}
+
+static void mtk_gdm_pcs_get_state(struct mtk_mac *mac,
 				  struct phylink_link_state *state)
 {
-	struct mtk_mac *mac = container_of(config, struct mtk_mac,
-					   phylink_config);
 	u32 pmsr = mtk_r32(mac->hw, MTK_MAC_MSR(mac->id));
 
 	state->link = (pmsr & MAC_MSR_LINK);
@@ -664,15 +797,35 @@ static void mtk_mac_pcs_get_state(struct
 		state->pause |= MLO_PAUSE_TX;
 }
 
+static void mtk_mac_pcs_get_state(struct phylink_config *config,
+				  struct phylink_link_state *state)
+{
+	struct mtk_mac *mac = container_of(config, struct mtk_mac,
+					   phylink_config);
+
+	if (mtk_interface_mode_is_xgmii(state->interface))
+		mtk_xgdm_pcs_get_state(mac, state);
+	else
+		mtk_gdm_pcs_get_state(mac, state);
+}
+
 static void mtk_mac_link_down(struct phylink_config *config, unsigned int mode,
 			      phy_interface_t interface)
 {
 	struct mtk_mac *mac = container_of(config, struct mtk_mac,
 					   phylink_config);
-	u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
+	u32 mcr;
 
-	mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN);
-	mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
+	if (!mtk_interface_mode_is_xgmii(interface)) {
+		mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
+		mcr &= ~(MAC_MCR_TX_EN | MAC_MCR_RX_EN);
+		mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
+	} else if (mac->id != MTK_GMAC1_ID) {
+		mcr = mtk_r32(mac->hw, MTK_XMAC_MCR(mac->id));
+		mcr &= 0xfffffff0;
+		mcr |= XMAC_MCR_TRX_DISABLE;
+		mtk_w32(mac->hw, mcr, MTK_XMAC_MCR(mac->id));
+	}
 }
 
 static void mtk_set_queue_speed(struct mtk_eth *eth, unsigned int idx,
@@ -744,13 +897,11 @@ static void mtk_set_queue_speed(struct m
 	mtk_w32(eth, val, soc->reg_map->qdma.qtx_sch + ofs);
 }
 
-static void mtk_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)
+static void mtk_gdm_mac_link_up(struct mtk_mac *mac,
+				struct phy_device *phy,
+				unsigned int mode, phy_interface_t interface,
+				int speed, int duplex, bool tx_pause, bool rx_pause)
 {
-	struct mtk_mac *mac = container_of(config, struct mtk_mac,
-					   phylink_config);
 	u32 mcr;
 
 	mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
@@ -784,6 +935,47 @@ static void mtk_mac_link_up(struct phyli
 	mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
 }
 
+static void mtk_xgdm_mac_link_up(struct mtk_mac *mac,
+				 struct phy_device *phy,
+				 unsigned int mode, phy_interface_t interface,
+				 int speed, int duplex, bool tx_pause, bool rx_pause)
+{
+	u32 mcr;
+
+	if (mac->id == MTK_GMAC1_ID)
+		return;
+
+	mcr = mtk_r32(mac->hw, MTK_XMAC_MCR(mac->id));
+
+	mcr &= ~(XMAC_MCR_FORCE_TX_FC |	XMAC_MCR_FORCE_RX_FC);
+	/* Configure pause modes -
+	 * phylink will avoid these for half duplex
+	 */
+	if (tx_pause)
+		mcr |= XMAC_MCR_FORCE_TX_FC;
+	if (rx_pause)
+		mcr |= XMAC_MCR_FORCE_RX_FC;
+
+	mcr &= ~(XMAC_MCR_TRX_DISABLE);
+	mtk_w32(mac->hw, mcr, MTK_XMAC_MCR(mac->id));
+}
+
+static void mtk_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 mtk_mac *mac = container_of(config, struct mtk_mac,
+					   phylink_config);
+
+	if (mtk_interface_mode_is_xgmii(interface))
+		mtk_xgdm_mac_link_up(mac, phy, mode, interface, speed, duplex,
+				     tx_pause, rx_pause);
+	else
+		mtk_gdm_mac_link_up(mac, phy, mode, interface, speed, duplex,
+				    tx_pause, rx_pause);
+}
+
 static const struct phylink_mac_ops mtk_phylink_ops = {
 	.validate = phylink_generic_validate,
 	.mac_select_pcs = mtk_mac_select_pcs,
@@ -836,10 +1028,21 @@ static int mtk_mdio_init(struct mtk_eth
 	}
 	divider = min_t(unsigned int, DIV_ROUND_UP(MDC_MAX_FREQ, max_clk), 63);
 
+	/* Configure MDC Turbo Mode */
+	if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3)) {
+		val = mtk_r32(eth, MTK_MAC_MISC_V3);
+		val |= MISC_MDC_TURBO;
+		mtk_w32(eth, val, MTK_MAC_MISC_V3);
+	} else {
+		val = mtk_r32(eth, MTK_PPSC);
+		val |= PPSC_MDC_TURBO;
+		mtk_w32(eth, val, MTK_PPSC);
+	}
+
 	/* Configure MDC Divider */
 	val = mtk_r32(eth, MTK_PPSC);
 	val &= ~PPSC_MDC_CFG;
-	val |= FIELD_PREP(PPSC_MDC_CFG, divider) | PPSC_MDC_TURBO;
+	val |= FIELD_PREP(PPSC_MDC_CFG, divider);
 	mtk_w32(eth, val, MTK_PPSC);
 
 	dev_dbg(eth->dev, "MDC is running on %d Hz\n", MDC_MAX_FREQ / divider);
@@ -4415,8 +4618,8 @@ static int mtk_add_mac(struct mtk_eth *e
 	const __be32 *_id = of_get_property(np, "reg", NULL);
 	phy_interface_t phy_mode;
 	struct phylink *phylink;
-	struct mtk_mac *mac;
 	int id, err;
+	struct mtk_mac *mac;
 	int txqs = 1;
 
 	if (!_id) {
@@ -4518,6 +4721,32 @@ static int mtk_add_mac(struct mtk_eth *e
 			  mac->phylink_config.supported_interfaces);
 	}
 
+	if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_USXGMII)) {
+		if (id == MTK_GMAC1_ID) {
+			mac->phylink_config.mac_capabilities = MAC_ASYM_PAUSE |
+							       MAC_SYM_PAUSE |
+							       MAC_10000FD;
+			phy_interface_zero(
+				mac->phylink_config.supported_interfaces);
+			__set_bit(PHY_INTERFACE_MODE_INTERNAL,
+				  mac->phylink_config.supported_interfaces);
+		} else {
+			mac->phylink_config.mac_capabilities |= MAC_5000FD | MAC_10000FD;
+			__set_bit(PHY_INTERFACE_MODE_5GBASER,
+				  mac->phylink_config.supported_interfaces);
+			__set_bit(PHY_INTERFACE_MODE_10GKR,
+				  mac->phylink_config.supported_interfaces);
+			__set_bit(PHY_INTERFACE_MODE_USXGMII,
+				  mac->phylink_config.supported_interfaces);
+		}
+	}
+
+	if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_2P5GPHY)) {
+		if (id == MTK_GMAC2_ID)
+			__set_bit(PHY_INTERFACE_MODE_INTERNAL,
+				  mac->phylink_config.supported_interfaces);
+	}
+
 	phylink = phylink_create(&mac->phylink_config,
 				 of_fwnode_handle(mac->of_node),
 				 phy_mode, &mtk_phylink_ops);
@@ -4705,6 +4934,13 @@ static int mtk_probe(struct platform_dev
 
 		if (err)
 			return err;
+	}
+
+	if (MTK_HAS_CAPS(eth->soc->caps, MTK_USXGMII)) {
+		err = mtk_usxgmii_init(eth);
+
+		if (err)
+			return err;
 	}
 
 	if (eth->soc->required_pctl) {
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -126,6 +126,11 @@
 #define MTK_GDMA_TO_PDMA	0x0
 #define MTK_GDMA_DROP_ALL       0x7777
 
+/* GDM Egress Control Register */
+#define MTK_GDMA_EG_CTRL(x)	((x == MTK_GMAC3_ID) ?		\
+				 0x544 : 0x504 + (x * 0x1000))
+#define MTK_GDMA_XGDM_SEL	BIT(31)
+
 /* Unicast Filter MAC Address Register - Low */
 #define MTK_GDMA_MAC_ADRL(x)	(0x508 + (x * 0x1000))
 
@@ -386,7 +391,26 @@
 #define PHY_IAC_TIMEOUT		HZ
 
 #define MTK_MAC_MISC		0x1000c
+#define MTK_MAC_MISC_V3		0x10010
 #define MTK_MUX_TO_ESW		BIT(0)
+#define MISC_MDC_TURBO		BIT(4)
+
+/* XMAC status registers */
+#define MTK_XGMAC_STS(x)	((x == MTK_GMAC3_ID) ? 0x1001C : 0x1000C)
+#define MTK_XGMAC_FORCE_LINK(x)	((x == MTK_GMAC2_ID) ? BIT(31) : BIT(15))
+#define MTK_USXGMII_PCS_LINK	BIT(8)
+#define MTK_XGMAC_RX_FC		BIT(5)
+#define MTK_XGMAC_TX_FC		BIT(4)
+#define MTK_USXGMII_PCS_MODE	GENMASK(3, 1)
+#define MTK_XGMAC_LINK_STS	BIT(0)
+
+/* GSW bridge registers */
+#define MTK_GSW_CFG		(0x10080)
+#define GSWTX_IPG_MASK		GENMASK(19, 16)
+#define GSWTX_IPG_SHIFT		16
+#define GSWRX_IPG_MASK		GENMASK(3, 0)
+#define GSWRX_IPG_SHIFT		0
+#define GSW_IPG_11		11
 
 /* Mac control registers */
 #define MTK_MAC_MCR(x)		(0x10100 + (x * 0x100))
@@ -411,6 +435,17 @@
 #define MAC_MCR_FORCE_LINK	BIT(0)
 #define MAC_MCR_FORCE_LINK_DOWN	(MAC_MCR_FORCE_MODE)
 
+/* Mac EEE control registers */
+#define MTK_MAC_EEE(x)		(0x10104 + (x * 0x100))
+#define MAC_EEE_WAKEUP_TIME_1000	GENMASK(31, 24)
+#define MAC_EEE_WAKEUP_TIME_100	GENMASK(23, 16)
+#define MAC_EEE_LPI_TXIDLE_THD	GENMASK(15, 8)
+#define MAC_EEE_RESV0		GENMASK(7, 4)
+#define MAC_EEE_CKG_TXILDE	BIT(3)
+#define MAC_EEE_CKG_RXLPI	BIT(2)
+#define MAC_EEE_TX_DOWN_REQ	BIT(1)
+#define MAC_EEE_LPI_MODE	BIT(0)
+
 /* Mac status registers */
 #define MTK_MAC_MSR(x)		(0x10108 + (x * 0x100))
 #define MAC_MSR_EEE1G		BIT(7)
@@ -455,6 +490,12 @@
 #define INTF_MODE_RGMII_1000    (TRGMII_MODE | TRGMII_CENTRAL_ALIGNED)
 #define INTF_MODE_RGMII_10_100  0
 
+/* XFI Mac control registers */
+#define MTK_XMAC_MCR(x)		(0x12000 + ((x - 1) * 0x1000))
+#define XMAC_MCR_TRX_DISABLE	0xf
+#define XMAC_MCR_FORCE_TX_FC	BIT(5)
+#define XMAC_MCR_FORCE_RX_FC	BIT(4)
+
 /* GPIO port control registers for GMAC 2*/
 #define GPIO_OD33_CTRL8		0x4c0
 #define GPIO_BIAS_CTRL		0xed0
@@ -480,6 +521,7 @@
 #define SYSCFG0_SGMII_GMAC2    ((3 << 8) & SYSCFG0_SGMII_MASK)
 #define SYSCFG0_SGMII_GMAC1_V2 BIT(9)
 #define SYSCFG0_SGMII_GMAC2_V2 BIT(8)
+#define SYSCFG0_SGMII_GMAC3_V2 BIT(7)
 
 
 /* ethernet subsystem clock register */
@@ -506,16 +548,91 @@
 #define ETHSYS_DMA_AG_MAP_QDMA	BIT(1)
 #define ETHSYS_DMA_AG_MAP_PPE	BIT(2)
 
+/* USXGMII subsystem config registers */
+/* Register to control speed */
+#define RG_PHY_TOP_SPEED_CTRL1	0x80C
+#define USXGMII_RATE_UPDATE_MODE	BIT(31)
+#define USXGMII_MAC_CK_GATED	BIT(29)
+#define USXGMII_IF_FORCE_EN	BIT(28)
+#define USXGMII_RATE_ADAPT_MODE	GENMASK(10, 8)
+#define USXGMII_RATE_ADAPT_MODE_X1	0
+#define USXGMII_RATE_ADAPT_MODE_X2	1
+#define USXGMII_RATE_ADAPT_MODE_X4	2
+#define USXGMII_RATE_ADAPT_MODE_X10	3
+#define USXGMII_RATE_ADAPT_MODE_X100	4
+#define USXGMII_RATE_ADAPT_MODE_X5	5
+#define USXGMII_RATE_ADAPT_MODE_X50	6
+#define USXGMII_XFI_RX_MODE	GENMASK(6, 4)
+#define USXGMII_XFI_RX_MODE_10G	0
+#define USXGMII_XFI_RX_MODE_5G	1
+#define USXGMII_XFI_TX_MODE	GENMASK(2, 0)
+#define USXGMII_XFI_TX_MODE_10G	0
+#define USXGMII_XFI_TX_MODE_5G	1
+
+/* Register to control PCS AN */
+#define RG_PCS_AN_CTRL0		0x810
+#define USXGMII_AN_RESTART	BIT(31)
+#define USXGMII_AN_SYNC_CNT	GENMASK(30, 11)
+#define USXGMII_AN_ENABLE	BIT(0)
+
+#define RG_PCS_AN_CTRL2		0x818
+#define USXGMII_LINK_TIMER_IDLE_DETECT	GENMASK(29, 20)
+#define USXGMII_LINK_TIMER_COMP_ACK_DETECT	GENMASK(19, 10)
+#define USXGMII_LINK_TIMER_AN_RESTART	GENMASK(9, 0)
+
+/* Register to read PCS AN status */
+#define RG_PCS_AN_STS0		0x81c
+#define USXGMII_LPA_SPEED_MASK	GENMASK(11, 9)
+#define USXGMII_LPA_SPEED_10	0
+#define USXGMII_LPA_SPEED_100	1
+#define USXGMII_LPA_SPEED_1000	2
+#define USXGMII_LPA_SPEED_10000	3
+#define USXGMII_LPA_SPEED_2500	4
+#define USXGMII_LPA_SPEED_5000	5
+#define USXGMII_LPA_DUPLEX	BIT(12)
+#define USXGMII_LPA_LINK	BIT(15)
+#define USXGMII_LPA_LATCH	BIT(31)
+
+/* Register to control USXGMII XFI PLL digital */
+#define XFI_PLL_DIG_GLB8	0x08
+#define RG_XFI_PLL_EN		BIT(31)
+
+/* Register to control USXGMII XFI PLL analog */
+#define XFI_PLL_ANA_GLB8	0x108
+#define RG_XFI_PLL_ANA_SWWA	0x02283248
+
 /* Infrasys subsystem config registers */
 #define INFRA_MISC2            0x70c
 #define CO_QPHY_SEL            BIT(0)
 #define GEPHY_MAC_SEL          BIT(1)
 
+/* Toprgu subsystem config registers */
+#define TOPRGU_SWSYSRST		0x18
+#define SWSYSRST_UNLOCK_KEY	GENMASK(31, 24)
+#define SWSYSRST_XFI_PLL_GRST	BIT(16)
+#define SWSYSRST_XFI_PEXPT1_GRST	BIT(15)
+#define SWSYSRST_XFI_PEXPT0_GRST	BIT(14)
+#define SWSYSRST_XFI1_GRST	BIT(13)
+#define SWSYSRST_XFI0_GRST	BIT(12)
+#define SWSYSRST_SGMII1_GRST	BIT(2)
+#define SWSYSRST_SGMII0_GRST	BIT(1)
+#define TOPRGU_SWSYSRST_EN		0xFC
+
 /* Top misc registers */
+#define TOP_MISC_NETSYS_PCS_MUX	0x84
+#define NETSYS_PCS_MUX_MASK	GENMASK(1, 0)
+#define	MUX_G2_USXGMII_SEL	BIT(1)
+#define MUX_HSGMII1_G1_SEL	BIT(0)
+
 #define USB_PHY_SWITCH_REG	0x218
 #define QPHY_SEL_MASK		GENMASK(1, 0)
 #define SGMII_QPHY_SEL		0x2
 
+/* MDIO control */
+#define MII_MMD_ACC_CTL_REG	0x0d
+#define MII_MMD_ADDR_DATA_REG	0x0e
+#define MMD_OP_MODE_DATA	BIT(14)
+
 /* MT7628/88 specific stuff */
 #define MT7628_PDMA_OFFSET	0x0800
 #define MT7628_SDM_OFFSET	0x0c00
@@ -809,13 +926,6 @@ enum mtk_gmac_id {
 	MTK_GMAC_ID_MAX
 };
 
-/* GDM Type */
-enum mtk_gdm_type {
-	MTK_GDM_TYPE = 0,
-	MTK_XGDM_TYPE,
-	MTK_GDM_TYPE_MAX
-};
-
 enum mtk_tx_buf_type {
 	MTK_TYPE_SKB,
 	MTK_TYPE_XDP_TX,
@@ -902,6 +1012,7 @@ enum mkt_eth_capabilities {
 	MTK_TRGMII_BIT,
 	MTK_SGMII_BIT,
 	MTK_USXGMII_BIT,
+	MTK_2P5GPHY_BIT,
 	MTK_ESW_BIT,
 	MTK_GEPHY_BIT,
 	MTK_MUX_BIT,
@@ -922,6 +1033,7 @@ enum mkt_eth_capabilities {
 	MTK_ETH_MUX_GDM1_TO_GMAC1_ESW_BIT,
 	MTK_ETH_MUX_GMAC2_GMAC0_TO_GEPHY_BIT,
 	MTK_ETH_MUX_U3_GMAC2_TO_QPHY_BIT,
+	MTK_ETH_MUX_GMAC2_TO_2P5GPHY_BIT,
 	MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII_BIT,
 	MTK_ETH_MUX_GMAC12_TO_GEPHY_SGMII_BIT,
 	MTK_ETH_MUX_GMAC123_TO_GEPHY_SGMII_BIT,
@@ -933,6 +1045,7 @@ enum mkt_eth_capabilities {
 	MTK_ETH_PATH_GMAC1_SGMII_BIT,
 	MTK_ETH_PATH_GMAC2_RGMII_BIT,
 	MTK_ETH_PATH_GMAC2_SGMII_BIT,
+	MTK_ETH_PATH_GMAC2_2P5GPHY_BIT,
 	MTK_ETH_PATH_GMAC2_GEPHY_BIT,
 	MTK_ETH_PATH_GMAC3_SGMII_BIT,
 	MTK_ETH_PATH_GDM1_ESW_BIT,
@@ -946,6 +1059,7 @@ enum mkt_eth_capabilities {
 #define MTK_TRGMII		BIT_ULL(MTK_TRGMII_BIT)
 #define MTK_SGMII		BIT_ULL(MTK_SGMII_BIT)
 #define MTK_USXGMII		BIT_ULL(MTK_USXGMII_BIT)
+#define MTK_2P5GPHY		BIT_ULL(MTK_2P5GPHY_BIT)
 #define MTK_ESW			BIT_ULL(MTK_ESW_BIT)
 #define MTK_GEPHY		BIT_ULL(MTK_GEPHY_BIT)
 #define MTK_MUX			BIT_ULL(MTK_MUX_BIT)
@@ -968,6 +1082,8 @@ enum mkt_eth_capabilities {
 	BIT_ULL(MTK_ETH_MUX_GMAC2_GMAC0_TO_GEPHY_BIT)
 #define MTK_ETH_MUX_U3_GMAC2_TO_QPHY		\
 	BIT_ULL(MTK_ETH_MUX_U3_GMAC2_TO_QPHY_BIT)
+#define MTK_ETH_MUX_GMAC2_TO_2P5GPHY		\
+	BIT_ULL(MTK_ETH_MUX_GMAC2_TO_2P5GPHY_BIT)
 #define MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII	\
 	BIT_ULL(MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII_BIT)
 #define MTK_ETH_MUX_GMAC12_TO_GEPHY_SGMII	\
@@ -983,6 +1099,7 @@ enum mkt_eth_capabilities {
 #define MTK_ETH_PATH_GMAC1_SGMII	BIT_ULL(MTK_ETH_PATH_GMAC1_SGMII_BIT)
 #define MTK_ETH_PATH_GMAC2_RGMII	BIT_ULL(MTK_ETH_PATH_GMAC2_RGMII_BIT)
 #define MTK_ETH_PATH_GMAC2_SGMII	BIT_ULL(MTK_ETH_PATH_GMAC2_SGMII_BIT)
+#define MTK_ETH_PATH_GMAC2_2P5GPHY	BIT_ULL(MTK_ETH_PATH_GMAC2_2P5GPHY_BIT)
 #define MTK_ETH_PATH_GMAC2_GEPHY	BIT_ULL(MTK_ETH_PATH_GMAC2_GEPHY_BIT)
 #define MTK_ETH_PATH_GMAC3_SGMII	BIT_ULL(MTK_ETH_PATH_GMAC3_SGMII_BIT)
 #define MTK_ETH_PATH_GDM1_ESW		BIT_ULL(MTK_ETH_PATH_GDM1_ESW_BIT)
@@ -996,6 +1113,7 @@ enum mkt_eth_capabilities {
 #define MTK_GMAC2_RGMII		(MTK_ETH_PATH_GMAC2_RGMII | MTK_RGMII)
 #define MTK_GMAC2_SGMII		(MTK_ETH_PATH_GMAC2_SGMII | MTK_SGMII)
 #define MTK_GMAC2_GEPHY		(MTK_ETH_PATH_GMAC2_GEPHY | MTK_GEPHY)
+#define MTK_GMAC2_2P5GPHY	(MTK_ETH_PATH_GMAC2_2P5GPHY | MTK_2P5GPHY)
 #define MTK_GMAC3_SGMII		(MTK_ETH_PATH_GMAC3_SGMII | MTK_SGMII)
 #define MTK_GDM1_ESW		(MTK_ETH_PATH_GDM1_ESW | MTK_ESW)
 #define MTK_GMAC1_USXGMII	(MTK_ETH_PATH_GMAC1_USXGMII | MTK_USXGMII)
@@ -1019,6 +1137,10 @@ enum mkt_eth_capabilities {
 	(MTK_ETH_MUX_GMAC1_GMAC2_TO_SGMII_RGMII | MTK_MUX | \
 	MTK_SHARED_SGMII)
 
+/* 2: GMAC2 -> XGMII */
+#define MTK_MUX_GMAC2_TO_2P5GPHY      \
+	(MTK_ETH_MUX_GMAC2_TO_2P5GPHY | MTK_MUX | MTK_INFRA)
+
 /* 0: GMACx -> GEPHY, 1: GMACx -> SGMII where x is 1 or 2 */
 #define MTK_MUX_GMAC12_TO_GEPHY_SGMII   \
 	(MTK_ETH_MUX_GMAC12_TO_GEPHY_SGMII | MTK_MUX)
@@ -1077,7 +1199,8 @@ enum mkt_eth_capabilities {
 		       MTK_MUX_GMAC123_TO_GEPHY_SGMII |		\
 		       MTK_NETSYS_V3 | MTK_RSTCTRL_PPE1 |	\
 		       MTK_GMAC1_USXGMII | MTK_GMAC2_USXGMII |	\
-		       MTK_GMAC3_USXGMII | MTK_MUX_GMAC123_TO_USXGMII)
+		       MTK_GMAC3_USXGMII | MTK_MUX_GMAC123_TO_USXGMII | \
+		       MTK_GMAC2_2P5GPHY | MTK_MUX_GMAC2_TO_2P5GPHY)
 
 struct mtk_tx_dma_desc_info {
 	dma_addr_t	addr;
@@ -1183,6 +1306,22 @@ struct mtk_soc_data {
 
 #define MTK_DMA_MONITOR_TIMEOUT		msecs_to_jiffies(1000)
 
+/* struct mtk_usxgmii_pcs - This structure holds each usxgmii regmap and
+ *			associated data
+ * @regmap:		The register map pointing at the range used to setup
+ *			USXGMII modes
+ * @interface:		Currently selected interface mode
+ * @id:			The element is used to record the index of PCS
+ * @pcs:		Phylink PCS structure
+ */
+struct mtk_usxgmii_pcs {
+	struct mtk_eth		*eth;
+	struct regmap		*regmap;
+	phy_interface_t		interface;
+	u8			id;
+	struct phylink_pcs	pcs;
+};
+
 /* struct mtk_eth -	This is the main datasructure for holding the state
  *			of the driver
  * @dev:		The device pointer
@@ -1203,6 +1342,11 @@ struct mtk_soc_data {
  * @infra:              The register map pointing at the range used to setup
  *                      SGMII and GePHY path
  * @sgmii_pcs:		Pointers to mtk-pcs-lynxi phylink_pcs instances
+ * @usxgmii_pll:	The register map pointing at the range used to control
+ *			the USXGMII SerDes PLL
+ * @regmap_pextp:	The register map pointing at the range used to setup
+ *			PHYA
+ * @usxgmii_pcs:	Pointer to array of pointers to struct for USXGMII PCS
  * @pctl:		The register map pointing at the range used to setup
  *			GMAC port drive/slew values
  * @dma_refcnt:		track how many netdevs are using the DMA engine
@@ -1244,7 +1388,11 @@ struct mtk_eth {
 	unsigned long			sysclk;
 	struct regmap			*ethsys;
 	struct regmap			*infra;
+	struct regmap			*toprgu;
 	struct phylink_pcs		**sgmii_pcs;
+	struct regmap			*usxgmii_pll;
+	struct regmap			**regmap_pextp;
+	struct mtk_usxgmii_pcs		**usxgmii_pcs;
 	struct regmap			*pctl;
 	bool				hwlro;
 	refcount_t			dma_refcnt;
@@ -1400,6 +1548,19 @@ static inline u32 mtk_get_ib2_multicast_
 	return MTK_FOE_IB2_MULTICAST;
 }
 
+static inline bool mtk_interface_mode_is_xgmii(phy_interface_t interface)
+{
+	switch (interface) {
+	case PHY_INTERFACE_MODE_USXGMII:
+	case PHY_INTERFACE_MODE_10GKR:
+	case PHY_INTERFACE_MODE_5GBASER:
+		return true;
+		break;
+	default:
+		return false;
+	}
+}
+
 /* read the hardware status register */
 void mtk_stats_update_mac(struct mtk_mac *mac);
 
@@ -1407,8 +1568,10 @@ void mtk_w32(struct mtk_eth *eth, u32 va
 u32 mtk_r32(struct mtk_eth *eth, unsigned reg);
 
 int mtk_gmac_sgmii_path_setup(struct mtk_eth *eth, int mac_id);
+int mtk_gmac_2p5gphy_path_setup(struct mtk_eth *eth, int mac_id);
 int mtk_gmac_gephy_path_setup(struct mtk_eth *eth, int mac_id);
 int mtk_gmac_rgmii_path_setup(struct mtk_eth *eth, int mac_id);
+int mtk_gmac_usxgmii_path_setup(struct mtk_eth *eth, int mac_id);
 
 int mtk_eth_offload_init(struct mtk_eth *eth);
 int mtk_eth_setup_tc(struct net_device *dev, enum tc_setup_type type,
@@ -1418,5 +1581,20 @@ int mtk_flow_offload_cmd(struct mtk_eth
 void mtk_flow_offload_cleanup(struct mtk_eth *eth, struct list_head *list);
 void mtk_eth_set_dma_device(struct mtk_eth *eth, struct device *dma_dev);
 
+#ifdef CONFIG_NET_MEDIATEK_SOC_USXGMII
+struct phylink_pcs *mtk_usxgmii_select_pcs(struct mtk_eth *eth, int id);
+int mtk_usxgmii_init(struct mtk_eth *eth);
+int mtk_xfi_pll_enable(struct mtk_eth *eth);
+void mtk_sgmii_setup_phya_gen1(struct mtk_eth *eth, int mac_id);
+void mtk_sgmii_setup_phya_gen2(struct mtk_eth *eth, int mac_id);
+void mtk_sgmii_reset(struct mtk_eth *eth, int mac_id);
+#else
+static inline struct phylink_pcs *mtk_usxgmii_select_pcs(struct mtk_eth *eth, int id) { return NULL; }
+static inline int mtk_usxgmii_init(struct mtk_eth *eth) { return 0; }
+static inline int mtk_xfi_pll_enable(struct mtk_eth *eth) { return 0; }
+static inline void mtk_sgmii_setup_phya_gen1(struct mtk_eth *eth, int mac_id) { }
+static inline void mtk_sgmii_setup_phya_gen2(struct mtk_eth *eth, int mac_id) { }
+static inline void mtk_sgmii_reset(struct mtk_eth *eth, int mac_id) { }
+#endif /* NET_MEDIATEK_SOC_USXGMII */
 
 #endif /* MTK_ETH_H */
--- /dev/null
+++ b/drivers/net/ethernet/mediatek/mtk_usxgmii.c
@@ -0,0 +1,835 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (c) 2022 MediaTek Inc.
+ * Author: Henry Yen <[email protected]>
+ *         Daniel Golle <[email protected]>
+ */
+
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include "mtk_eth_soc.h"
+
+static struct mtk_usxgmii_pcs *pcs_to_mtk_usxgmii_pcs(struct phylink_pcs *pcs)
+{
+	return container_of(pcs, struct mtk_usxgmii_pcs, pcs);
+}
+
+static int mtk_xfi_pextp_init(struct mtk_eth *eth)
+{
+	struct device *dev = eth->dev;
+	struct device_node *r = dev->of_node;
+	struct device_node *np;
+	int i;
+
+	eth->regmap_pextp = devm_kcalloc(dev, eth->soc->num_devs, sizeof(eth->regmap_pextp), GFP_KERNEL);
+	if (!eth->regmap_pextp)
+		return -ENOMEM;
+
+	for (i = 0; i < eth->soc->num_devs; i++) {
+		np = of_parse_phandle(r, "mediatek,xfi_pextp", i);
+		if (!np)
+			break;
+
+		eth->regmap_pextp[i] = syscon_node_to_regmap(np);
+		if (IS_ERR(eth->regmap_pextp[i]))
+			return PTR_ERR(eth->regmap_pextp[i]);
+	}
+
+	return 0;
+}
+
+static int mtk_xfi_pll_init(struct mtk_eth *eth)
+{
+	struct device_node *r = eth->dev->of_node;
+	struct device_node *np;
+
+	np = of_parse_phandle(r, "mediatek,xfi_pll", 0);
+	if (!np)
+		return -1;
+
+	eth->usxgmii_pll = syscon_node_to_regmap(np);
+	if (IS_ERR(eth->usxgmii_pll))
+		return PTR_ERR(eth->usxgmii_pll);
+
+	return 0;
+}
+
+static int mtk_toprgu_init(struct mtk_eth *eth)
+{
+	struct device_node *r = eth->dev->of_node;
+	struct device_node *np;
+
+	np = of_parse_phandle(r, "mediatek,toprgu", 0);
+	if (!np)
+		return -1;
+
+	eth->toprgu = syscon_node_to_regmap(np);
+	if (IS_ERR(eth->toprgu))
+		return PTR_ERR(eth->toprgu);
+
+	return 0;
+}
+
+int mtk_xfi_pll_enable(struct mtk_eth *eth)
+{
+	u32 val = 0;
+
+	if (!eth->usxgmii_pll)
+		return -EINVAL;
+
+	/* Add software workaround for USXGMII PLL TCL issue */
+	regmap_write(eth->usxgmii_pll, XFI_PLL_ANA_GLB8, RG_XFI_PLL_ANA_SWWA);
+
+	regmap_read(eth->usxgmii_pll, XFI_PLL_DIG_GLB8, &val);
+	val |= RG_XFI_PLL_EN;
+	regmap_write(eth->usxgmii_pll, XFI_PLL_DIG_GLB8, val);
+
+	return 0;
+}
+
+static int mtk_mac2xgmii_id(struct mtk_eth *eth, int mac_id)
+{
+	int xgmii_id = mac_id;
+
+	if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3)) {
+		switch (mac_id) {
+		case MTK_GMAC1_ID:
+		case MTK_GMAC2_ID:
+			xgmii_id = 1;
+			break;
+		case MTK_GMAC3_ID:
+			xgmii_id = 0;
+			break;
+		default:
+			xgmii_id = -1;
+		}
+	}
+
+	return xgmii_id;
+}
+
+static int mtk_xgmii2mac_id(struct mtk_eth *eth, int xgmii_id)
+{
+	int mac_id = xgmii_id;
+
+	if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3)) {
+		switch (xgmii_id) {
+		case 0:
+			mac_id = 2;
+			break;
+		case 1:
+			mac_id = 1;
+			break;
+		default:
+			mac_id = -1;
+		}
+	}
+
+	return mac_id;
+}
+
+
+static void mtk_usxgmii_setup_phya_usxgmii(struct mtk_usxgmii_pcs *mpcs)
+{
+	struct regmap *pextp;
+
+	if (!mpcs->eth)
+		return;
+
+	pextp = mpcs->eth->regmap_pextp[mpcs->id];
+	if (!pextp)
+		return;
+
+	/* Setup operation mode */
+	regmap_write(pextp, 0x9024, 0x00C9071C);
+	regmap_write(pextp, 0x2020, 0xAA8585AA);
+	regmap_write(pextp, 0x2030, 0x0C020707);
+	regmap_write(pextp, 0x2034, 0x0E050F0F);
+	regmap_write(pextp, 0x2040, 0x00140032);
+	regmap_write(pextp, 0x50F0, 0x00C014AA);
+	regmap_write(pextp, 0x50E0, 0x3777C12B);
+	regmap_write(pextp, 0x506C, 0x005F9CFF);
+	regmap_write(pextp, 0x5070, 0x9D9DFAFA);
+	regmap_write(pextp, 0x5074, 0x27273F3F);
+	regmap_write(pextp, 0x5078, 0xA7883C68);
+	regmap_write(pextp, 0x507C, 0x11661166);
+	regmap_write(pextp, 0x5080, 0x0E000AAF);
+	regmap_write(pextp, 0x5084, 0x08080D0D);
+	regmap_write(pextp, 0x5088, 0x02030909);
+	regmap_write(pextp, 0x50E4, 0x0C0C0000);
+	regmap_write(pextp, 0x50E8, 0x04040000);
+	regmap_write(pextp, 0x50EC, 0x0F0F0C06);
+	regmap_write(pextp, 0x50A8, 0x506E8C8C);
+	regmap_write(pextp, 0x6004, 0x18190000);
+	regmap_write(pextp, 0x00F8, 0x01423342);
+	/* Force SGDT_OUT off and select PCS */
+	regmap_write(pextp, 0x00F4, 0x80201F20);
+	/* Force GLB_CKDET_OUT */
+	regmap_write(pextp, 0x0030, 0x00050C00);
+	/* Force AEQ on */
+	regmap_write(pextp, 0x0070, 0x02002800);
+	ndelay(1020);
+	/* Setup DA default value */
+	regmap_write(pextp, 0x30B0, 0x00000020);
+	regmap_write(pextp, 0x3028, 0x00008A01);
+	regmap_write(pextp, 0x302C, 0x0000A884);
+	regmap_write(pextp, 0x3024, 0x00083002);
+	regmap_write(pextp, 0x3010, 0x00022220);
+	regmap_write(pextp, 0x5064, 0x0F020A01);
+	regmap_write(pextp, 0x50B4, 0x06100600);
+	regmap_write(pextp, 0x3048, 0x40704000);
+	regmap_write(pextp, 0x3050, 0xA8000000);
+	regmap_write(pextp, 0x3054, 0x000000AA);
+	regmap_write(pextp, 0x306C, 0x00000F00);
+	regmap_write(pextp, 0xA060, 0x00040000);
+	regmap_write(pextp, 0x90D0, 0x00000001);
+	/* Release reset */
+	regmap_write(pextp, 0x0070, 0x0200E800);
+	udelay(150);
+	/* Switch to P0 */
+	regmap_write(pextp, 0x0070, 0x0200C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0200C101);
+	udelay(15);
+	/* Switch to Gen3 */
+	regmap_write(pextp, 0x0070, 0x0202C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0202C101);
+	udelay(100);
+	regmap_write(pextp, 0x30B0, 0x00000030);
+	regmap_write(pextp, 0x00F4, 0x80201F00);
+	regmap_write(pextp, 0x3040, 0x30000000);
+	udelay(400);
+}
+
+static void mtk_usxgmii_setup_phya_5gbaser(struct mtk_usxgmii_pcs *mpcs)
+{
+	struct regmap *pextp;
+
+	if (!mpcs->eth)
+		return;
+
+	pextp = mpcs->eth->regmap_pextp[mpcs->id];
+	if (!pextp)
+		return;
+
+	/* Setup operation mode */
+	regmap_write(pextp, 0x9024, 0x00D9071C);
+	regmap_write(pextp, 0x2020, 0xAAA5A5AA);
+	regmap_write(pextp, 0x2030, 0x0C020707);
+	regmap_write(pextp, 0x2034, 0x0E050F0F);
+	regmap_write(pextp, 0x2040, 0x00140032);
+	regmap_write(pextp, 0x50F0, 0x00C018AA);
+	regmap_write(pextp, 0x50E0, 0x3777812B);
+	regmap_write(pextp, 0x506C, 0x005C9CFF);
+	regmap_write(pextp, 0x5070, 0x9DFAFAFA);
+	regmap_write(pextp, 0x5074, 0x273F3F3F);
+	regmap_write(pextp, 0x5078, 0xA8883868);
+	regmap_write(pextp, 0x507C, 0x14661466);
+	regmap_write(pextp, 0x5080, 0x0E001ABF);
+	regmap_write(pextp, 0x5084, 0x080B0D0D);
+	regmap_write(pextp, 0x5088, 0x02050909);
+	regmap_write(pextp, 0x50E4, 0x0C000000);
+	regmap_write(pextp, 0x50E8, 0x04000000);
+	regmap_write(pextp, 0x50EC, 0x0F0F0C06);
+	regmap_write(pextp, 0x50A8, 0x50808C8C);
+	regmap_write(pextp, 0x6004, 0x18000000);
+	regmap_write(pextp, 0x00F8, 0x00A132A1);
+	/* Force SGDT_OUT off and select PCS */
+	regmap_write(pextp, 0x00F4, 0x80201F20);
+	/* Force GLB_CKDET_OUT */
+	regmap_write(pextp, 0x0030, 0x00050C00);
+	/* Force AEQ on */
+	regmap_write(pextp, 0x0070, 0x02002800);
+	ndelay(1020);
+	/* Setup DA default value */
+	regmap_write(pextp, 0x30B0, 0x00000020);
+	regmap_write(pextp, 0x3028, 0x00008A01);
+	regmap_write(pextp, 0x302C, 0x0000A884);
+	regmap_write(pextp, 0x3024, 0x00083002);
+	regmap_write(pextp, 0x3010, 0x00022220);
+	regmap_write(pextp, 0x5064, 0x0F020A01);
+	regmap_write(pextp, 0x50B4, 0x06100600);
+	regmap_write(pextp, 0x3048, 0x40704000);
+	regmap_write(pextp, 0x3050, 0xA8000000);
+	regmap_write(pextp, 0x3054, 0x000000AA);
+	regmap_write(pextp, 0x306C, 0x00000F00);
+	regmap_write(pextp, 0xA060, 0x00040000);
+	regmap_write(pextp, 0x90D0, 0x00000003);
+	/* Release reset */
+	regmap_write(pextp, 0x0070, 0x0200E800);
+	udelay(150);
+	/* Switch to P0 */
+	regmap_write(pextp, 0x0070, 0x0200C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0200C101);
+	udelay(15);
+	/* Switch to Gen3 */
+	regmap_write(pextp, 0x0070, 0x0202C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0202C101);
+	udelay(100);
+	regmap_write(pextp, 0x30B0, 0x00000030);
+	regmap_write(pextp, 0x00F4, 0x80201F00);
+	regmap_write(pextp, 0x3040, 0x30000000);
+	udelay(400);
+}
+
+static void mtk_usxgmii_setup_phya_10gbaser(struct mtk_usxgmii_pcs *mpcs)
+{
+	struct regmap *pextp;
+
+	if (!mpcs->eth)
+		return;
+
+	pextp = mpcs->eth->regmap_pextp[mpcs->id];
+	if (!pextp)
+		return;
+
+	/* Setup operation mode */
+	regmap_write(pextp, 0x9024, 0x00C9071C);
+	regmap_write(pextp, 0x2020, 0xAA8585AA);
+	regmap_write(pextp, 0x2030, 0x0C020707);
+	regmap_write(pextp, 0x2034, 0x0E050F0F);
+	regmap_write(pextp, 0x2040, 0x00140032);
+	regmap_write(pextp, 0x50F0, 0x00C014AA);
+	regmap_write(pextp, 0x50E0, 0x3777C12B);
+	regmap_write(pextp, 0x506C, 0x005F9CFF);
+	regmap_write(pextp, 0x5070, 0x9D9DFAFA);
+	regmap_write(pextp, 0x5074, 0x27273F3F);
+	regmap_write(pextp, 0x5078, 0xA7883C68);
+	regmap_write(pextp, 0x507C, 0x11661166);
+	regmap_write(pextp, 0x5080, 0x0E000AAF);
+	regmap_write(pextp, 0x5084, 0x08080D0D);
+	regmap_write(pextp, 0x5088, 0x02030909);
+	regmap_write(pextp, 0x50E4, 0x0C0C0000);
+	regmap_write(pextp, 0x50E8, 0x04040000);
+	regmap_write(pextp, 0x50EC, 0x0F0F0C06);
+	regmap_write(pextp, 0x50A8, 0x506E8C8C);
+	regmap_write(pextp, 0x6004, 0x18190000);
+	regmap_write(pextp, 0x00F8, 0x01423342);
+	/* Force SGDT_OUT off and select PCS */
+	regmap_write(pextp, 0x00F4, 0x80201F20);
+	/* Force GLB_CKDET_OUT */
+	regmap_write(pextp, 0x0030, 0x00050C00);
+	/* Force AEQ on */
+	regmap_write(pextp, 0x0070, 0x02002800);
+	ndelay(1020);
+	/* Setup DA default value */
+	regmap_write(pextp, 0x30B0, 0x00000020);
+	regmap_write(pextp, 0x3028, 0x00008A01);
+	regmap_write(pextp, 0x302C, 0x0000A884);
+	regmap_write(pextp, 0x3024, 0x00083002);
+	regmap_write(pextp, 0x3010, 0x00022220);
+	regmap_write(pextp, 0x5064, 0x0F020A01);
+	regmap_write(pextp, 0x50B4, 0x06100600);
+	regmap_write(pextp, 0x3048, 0x47684100);
+	regmap_write(pextp, 0x3050, 0x00000000);
+	regmap_write(pextp, 0x3054, 0x00000000);
+	regmap_write(pextp, 0x306C, 0x00000F00);
+	if (mpcs->id == 0)
+		regmap_write(pextp, 0xA008, 0x0007B400);
+
+	regmap_write(pextp, 0xA060, 0x00040000);
+	regmap_write(pextp, 0x90D0, 0x00000001);
+	/* Release reset */
+	regmap_write(pextp, 0x0070, 0x0200E800);
+	udelay(150);
+	/* Switch to P0 */
+	regmap_write(pextp, 0x0070, 0x0200C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0200C101);
+	udelay(15);
+	/* Switch to Gen3 */
+	regmap_write(pextp, 0x0070, 0x0202C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0202C101);
+	udelay(100);
+	regmap_write(pextp, 0x30B0, 0x00000030);
+	regmap_write(pextp, 0x00F4, 0x80201F00);
+	regmap_write(pextp, 0x3040, 0x30000000);
+	udelay(400);
+}
+
+void mtk_sgmii_setup_phya_gen1(struct mtk_eth *eth, int mac_id)
+{
+	u32 id = mtk_mac2xgmii_id(eth, mac_id);
+	struct regmap *pextp;
+
+	if (id >= eth->soc->num_devs)
+		return;
+
+	pextp = eth->regmap_pextp[id];
+	if (!pextp)
+		return;
+
+	/* Setup operation mode */
+	regmap_write(pextp, 0x9024, 0x00D9071C);
+	regmap_write(pextp, 0x2020, 0xAA8585AA);
+	regmap_write(pextp, 0x2030, 0x0C020207);
+	regmap_write(pextp, 0x2034, 0x0E05050F);
+	regmap_write(pextp, 0x2040, 0x00200032);
+	regmap_write(pextp, 0x50F0, 0x00C014BA);
+	regmap_write(pextp, 0x50E0, 0x3777C12B);
+	regmap_write(pextp, 0x506C, 0x005F9CFF);
+	regmap_write(pextp, 0x5070, 0x9D9DFAFA);
+	regmap_write(pextp, 0x5074, 0x27273F3F);
+	regmap_write(pextp, 0x5078, 0xA7883C68);
+	regmap_write(pextp, 0x507C, 0x11661166);
+	regmap_write(pextp, 0x5080, 0x0E000EAF);
+	regmap_write(pextp, 0x5084, 0x08080E0D);
+	regmap_write(pextp, 0x5088, 0x02030B09);
+	regmap_write(pextp, 0x50E4, 0x0C0C0000);
+	regmap_write(pextp, 0x50E8, 0x04040000);
+	regmap_write(pextp, 0x50EC, 0x0F0F0606);
+	regmap_write(pextp, 0x50A8, 0x506E8C8C);
+	regmap_write(pextp, 0x6004, 0x18190000);
+	regmap_write(pextp, 0x00F8, 0x00FA32FA);
+	/* Force SGDT_OUT off and select PCS */
+	regmap_write(pextp, 0x00F4, 0x80201F21);
+	/* Force GLB_CKDET_OUT */
+	regmap_write(pextp, 0x0030, 0x00050C00);
+	/* Force AEQ on */
+	regmap_write(pextp, 0x0070, 0x02002800);
+	ndelay(1020);
+	/* Setup DA default value */
+	regmap_write(pextp, 0x30B0, 0x00000020);
+	regmap_write(pextp, 0x3028, 0x00008A01);
+	regmap_write(pextp, 0x302C, 0x0000A884);
+	regmap_write(pextp, 0x3024, 0x00083002);
+	regmap_write(pextp, 0x3010, 0x00011110);
+	regmap_write(pextp, 0x3048, 0x40704000);
+	regmap_write(pextp, 0x3064, 0x0000C000);
+	regmap_write(pextp, 0x3050, 0xA8000000);
+	regmap_write(pextp, 0x3054, 0x000000AA);
+	regmap_write(pextp, 0x306C, 0x20200F00);
+	regmap_write(pextp, 0xA060, 0x00050000);
+	regmap_write(pextp, 0x90D0, 0x00000007);
+	/* Release reset */
+	regmap_write(pextp, 0x0070, 0x0200E800);
+	udelay(150);
+	/* Switch to P0 */
+	regmap_write(pextp, 0x0070, 0x0200C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0200C101);
+	udelay(15);
+	/* Switch to Gen2 */
+	regmap_write(pextp, 0x0070, 0x0201C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0201C101);
+	udelay(100);
+	regmap_write(pextp, 0x30B0, 0x00000030);
+	regmap_write(pextp, 0x00F4, 0x80201F01);
+	regmap_write(pextp, 0x3040, 0x30000000);
+	udelay(400);
+}
+
+void mtk_sgmii_setup_phya_gen2(struct mtk_eth *eth, int mac_id)
+{
+	u32 id = mtk_mac2xgmii_id(eth, mac_id);
+	struct regmap *pextp;
+
+	if (id >= eth->soc->num_devs)
+		return;
+
+	pextp = eth->regmap_pextp[id];
+	if (!pextp)
+		return;
+
+	/* Setup operation mode */
+	regmap_write(pextp, 0x9024, 0x00D9071C);
+	regmap_write(pextp, 0x2020, 0xAA8585AA);
+	regmap_write(pextp, 0x2030, 0x0C020707);
+	regmap_write(pextp, 0x2034, 0x0E050F0F);
+	regmap_write(pextp, 0x2040, 0x00140032);
+	regmap_write(pextp, 0x50F0, 0x00C014AA);
+	regmap_write(pextp, 0x50E0, 0x3777C12B);
+	regmap_write(pextp, 0x506C, 0x005F9CFF);
+	regmap_write(pextp, 0x5070, 0x9D9DFAFA);
+	regmap_write(pextp, 0x5074, 0x27273F3F);
+	regmap_write(pextp, 0x5078, 0xA7883C68);
+	regmap_write(pextp, 0x507C, 0x11661166);
+	regmap_write(pextp, 0x5080, 0x0E000AAF);
+	regmap_write(pextp, 0x5084, 0x08080D0D);
+	regmap_write(pextp, 0x5088, 0x02030909);
+	regmap_write(pextp, 0x50E4, 0x0C0C0000);
+	regmap_write(pextp, 0x50E8, 0x04040000);
+	regmap_write(pextp, 0x50EC, 0x0F0F0C06);
+	regmap_write(pextp, 0x50A8, 0x506E8C8C);
+	regmap_write(pextp, 0x6004, 0x18190000);
+	regmap_write(pextp, 0x00F8, 0x009C329C);
+	/* Force SGDT_OUT off and select PCS */
+	regmap_write(pextp, 0x00F4, 0x80201F21);
+	/* Force GLB_CKDET_OUT */
+	regmap_write(pextp, 0x0030, 0x00050C00);
+	/* Force AEQ on */
+	regmap_write(pextp, 0x0070, 0x02002800);
+	ndelay(1020);
+	/* Setup DA default value */
+	regmap_write(pextp, 0x30B0, 0x00000020);
+	regmap_write(pextp, 0x3028, 0x00008A01);
+	regmap_write(pextp, 0x302C, 0x0000A884);
+	regmap_write(pextp, 0x3024, 0x00083002);
+	regmap_write(pextp, 0x3010, 0x00011110);
+	regmap_write(pextp, 0x3048, 0x40704000);
+	regmap_write(pextp, 0x3050, 0xA8000000);
+	regmap_write(pextp, 0x3054, 0x000000AA);
+	regmap_write(pextp, 0x306C, 0x22000F00);
+	regmap_write(pextp, 0xA060, 0x00050000);
+	regmap_write(pextp, 0x90D0, 0x00000005);
+	/* Release reset */
+	regmap_write(pextp, 0x0070, 0x0200E800);
+	udelay(150);
+	/* Switch to P0 */
+	regmap_write(pextp, 0x0070, 0x0200C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0200C101);
+	udelay(15);
+	/* Switch to Gen2 */
+	regmap_write(pextp, 0x0070, 0x0201C111);
+	ndelay(1020);
+	regmap_write(pextp, 0x0070, 0x0201C101);
+	udelay(100);
+	regmap_write(pextp, 0x30B0, 0x00000030);
+	regmap_write(pextp, 0x00F4, 0x80201F01);
+	regmap_write(pextp, 0x3040, 0x30000000);
+	udelay(400);
+}
+
+static void mtk_usxgmii_reset(struct mtk_eth *eth, int id)
+{
+	u32 val = 0;
+
+	if (id >= eth->soc->num_devs || !eth->toprgu)
+		return;
+
+	switch (id) {
+	case 0:
+		/* Enable software reset */
+		regmap_read(eth->toprgu, TOPRGU_SWSYSRST_EN, &val);
+		val |= SWSYSRST_XFI_PEXPT0_GRST |
+		       SWSYSRST_XFI0_GRST;
+		regmap_write(eth->toprgu, TOPRGU_SWSYSRST_EN, val);
+
+		/* Assert USXGMII reset */
+		regmap_read(eth->toprgu, TOPRGU_SWSYSRST, &val);
+		val |= FIELD_PREP(SWSYSRST_UNLOCK_KEY, 0x88) |
+		       SWSYSRST_XFI_PEXPT0_GRST |
+		       SWSYSRST_XFI0_GRST;
+		regmap_write(eth->toprgu, TOPRGU_SWSYSRST, val);
+
+		udelay(100);
+
+		/* De-assert USXGMII reset */
+		regmap_read(eth->toprgu, TOPRGU_SWSYSRST, &val);
+		val |= FIELD_PREP(SWSYSRST_UNLOCK_KEY, 0x88);
+		val &= ~(SWSYSRST_XFI_PEXPT0_GRST |
+			 SWSYSRST_XFI0_GRST);
+		regmap_write(eth->toprgu, TOPRGU_SWSYSRST, val);
+
+		/* Disable software reset */
+		regmap_read(eth->toprgu, TOPRGU_SWSYSRST_EN, &val);
+		val &= ~(SWSYSRST_XFI_PEXPT0_GRST |
+			 SWSYSRST_XFI0_GRST);
+		regmap_write(eth->toprgu, TOPRGU_SWSYSRST_EN, val);
+		break;
+	case 1:
+		/* Enable software reset */
+		regmap_read(eth->toprgu, TOPRGU_SWSYSRST_EN, &val);
+		val |= SWSYSRST_XFI_PEXPT1_GRST |
+		       SWSYSRST_XFI1_GRST;
+		regmap_write(eth->toprgu, TOPRGU_SWSYSRST_EN, val);
+
+		/* Assert USXGMII reset */
+		regmap_read(eth->toprgu, TOPRGU_SWSYSRST, &val);
+		val |= FIELD_PREP(SWSYSRST_UNLOCK_KEY, 0x88) |
+		       SWSYSRST_XFI_PEXPT1_GRST |
+		       SWSYSRST_XFI1_GRST;
+		regmap_write(eth->toprgu, TOPRGU_SWSYSRST, val);
+
+		udelay(100);
+
+		/* De-assert USXGMII reset */
+		regmap_read(eth->toprgu, TOPRGU_SWSYSRST, &val);
+		val |= FIELD_PREP(SWSYSRST_UNLOCK_KEY, 0x88);
+		val &= ~(SWSYSRST_XFI_PEXPT1_GRST |
+			 SWSYSRST_XFI1_GRST);
+		regmap_write(eth->toprgu, TOPRGU_SWSYSRST, val);
+
+		/* Disable software reset */
+		regmap_read(eth->toprgu, TOPRGU_SWSYSRST_EN, &val);
+		val &= ~(SWSYSRST_XFI_PEXPT1_GRST |
+			 SWSYSRST_XFI1_GRST);
+		regmap_write(eth->toprgu, TOPRGU_SWSYSRST_EN, val);
+		break;
+	}
+
+	mdelay(10);
+}
+
+void mtk_sgmii_reset(struct mtk_eth *eth, int mac_id)
+{
+	u32 xgmii_id = mtk_mac2xgmii_id(eth, mac_id);
+
+	mtk_usxgmii_reset(eth, xgmii_id);
+}
+
+
+static int mtk_usxgmii_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
+				  phy_interface_t interface,
+				  const unsigned long *advertising,
+				  bool permit_pause_to_mac)
+{
+	struct mtk_usxgmii_pcs *mpcs = pcs_to_mtk_usxgmii_pcs(pcs);
+	struct mtk_eth *eth = mpcs->eth;
+	unsigned int an_ctrl = 0, link_timer = 0, xfi_mode = 0, adapt_mode = 0;
+	bool mode_changed = false;
+
+	if (interface == PHY_INTERFACE_MODE_USXGMII) {
+		an_ctrl = FIELD_PREP(USXGMII_AN_SYNC_CNT, 0x1FF) |
+			  USXGMII_AN_ENABLE;
+		link_timer = FIELD_PREP(USXGMII_LINK_TIMER_IDLE_DETECT, 0x7B) |
+			     FIELD_PREP(USXGMII_LINK_TIMER_COMP_ACK_DETECT, 0x7B) |
+			     FIELD_PREP(USXGMII_LINK_TIMER_AN_RESTART, 0x7B);
+		xfi_mode = FIELD_PREP(USXGMII_XFI_RX_MODE, USXGMII_XFI_RX_MODE_10G) |
+			   FIELD_PREP(USXGMII_XFI_TX_MODE, USXGMII_XFI_TX_MODE_10G);
+	} else if (interface == PHY_INTERFACE_MODE_10GKR) {
+		an_ctrl = FIELD_PREP(USXGMII_AN_SYNC_CNT, 0x1FF);
+		link_timer = FIELD_PREP(USXGMII_LINK_TIMER_IDLE_DETECT, 0x7B) |
+			     FIELD_PREP(USXGMII_LINK_TIMER_COMP_ACK_DETECT, 0x7B) |
+			     FIELD_PREP(USXGMII_LINK_TIMER_AN_RESTART, 0x7B);
+		xfi_mode = FIELD_PREP(USXGMII_XFI_RX_MODE, USXGMII_XFI_RX_MODE_10G) |
+			   FIELD_PREP(USXGMII_XFI_TX_MODE, USXGMII_XFI_TX_MODE_10G);
+		adapt_mode = USXGMII_RATE_UPDATE_MODE;
+	} else if (interface == PHY_INTERFACE_MODE_5GBASER) {
+		an_ctrl = FIELD_PREP(USXGMII_AN_SYNC_CNT, 0xFF);
+		link_timer = FIELD_PREP(USXGMII_LINK_TIMER_IDLE_DETECT, 0x3D) |
+			     FIELD_PREP(USXGMII_LINK_TIMER_COMP_ACK_DETECT, 0x3D) |
+			     FIELD_PREP(USXGMII_LINK_TIMER_AN_RESTART, 0x3D);
+		xfi_mode = FIELD_PREP(USXGMII_XFI_RX_MODE, USXGMII_XFI_RX_MODE_5G) |
+			   FIELD_PREP(USXGMII_XFI_TX_MODE, USXGMII_XFI_TX_MODE_5G);
+		adapt_mode = USXGMII_RATE_UPDATE_MODE;
+	} else
+		return -EINVAL;
+
+	adapt_mode |= FIELD_PREP(USXGMII_RATE_ADAPT_MODE, USXGMII_RATE_ADAPT_MODE_X1);
+
+	if (mpcs->interface != interface) {
+		mpcs->interface = interface;
+		mode_changed = true;
+	}
+
+	mtk_xfi_pll_enable(eth);
+	mtk_usxgmii_reset(eth, mpcs->id);
+
+	/* Setup USXGMII AN ctrl */
+	regmap_update_bits(mpcs->regmap, RG_PCS_AN_CTRL0,
+			   USXGMII_AN_SYNC_CNT | USXGMII_AN_ENABLE,
+			   an_ctrl);
+
+	regmap_update_bits(mpcs->regmap, RG_PCS_AN_CTRL2,
+			   USXGMII_LINK_TIMER_IDLE_DETECT |
+			   USXGMII_LINK_TIMER_COMP_ACK_DETECT |
+			   USXGMII_LINK_TIMER_AN_RESTART,
+			   link_timer);
+
+	/* Gated MAC CK */
+	regmap_update_bits(mpcs->regmap, RG_PHY_TOP_SPEED_CTRL1,
+			   USXGMII_MAC_CK_GATED, USXGMII_MAC_CK_GATED);
+
+	/* Enable interface force mode */
+	regmap_update_bits(mpcs->regmap, RG_PHY_TOP_SPEED_CTRL1,
+			   USXGMII_IF_FORCE_EN, USXGMII_IF_FORCE_EN);
+
+	/* Setup USXGMII adapt mode */
+	regmap_update_bits(mpcs->regmap, RG_PHY_TOP_SPEED_CTRL1,
+			   USXGMII_RATE_UPDATE_MODE | USXGMII_RATE_ADAPT_MODE,
+			   adapt_mode);
+
+	/* Setup USXGMII speed */
+	regmap_update_bits(mpcs->regmap, RG_PHY_TOP_SPEED_CTRL1,
+			   USXGMII_XFI_RX_MODE | USXGMII_XFI_TX_MODE,
+			   xfi_mode);
+
+	udelay(1);
+
+	/* Un-gated MAC CK */
+	regmap_update_bits(mpcs->regmap, RG_PHY_TOP_SPEED_CTRL1,
+			   USXGMII_MAC_CK_GATED, 0);
+
+	udelay(1);
+
+	/* Disable interface force mode for the AN mode */
+	if (an_ctrl & USXGMII_AN_ENABLE)
+		regmap_update_bits(mpcs->regmap, RG_PHY_TOP_SPEED_CTRL1,
+				   USXGMII_IF_FORCE_EN, 0);
+
+	/* Setup USXGMIISYS with the determined property */
+	if (interface == PHY_INTERFACE_MODE_USXGMII)
+		mtk_usxgmii_setup_phya_usxgmii(mpcs);
+	else if (interface == PHY_INTERFACE_MODE_10GKR)
+		mtk_usxgmii_setup_phya_10gbaser(mpcs);
+	else if (interface == PHY_INTERFACE_MODE_5GBASER)
+		mtk_usxgmii_setup_phya_5gbaser(mpcs);
+
+	return mode_changed;
+}
+
+static void mtk_usxgmii_pcs_get_state(struct phylink_pcs *pcs,
+				    struct phylink_link_state *state)
+{
+	struct mtk_usxgmii_pcs *mpcs = pcs_to_mtk_usxgmii_pcs(pcs);
+	struct mtk_eth *eth = mpcs->eth;
+	struct mtk_mac *mac = eth->mac[mtk_xgmii2mac_id(eth, mpcs->id)];
+	u32 val = 0;
+
+	regmap_read(mpcs->regmap, RG_PCS_AN_CTRL0, &val);
+	if (FIELD_GET(USXGMII_AN_ENABLE, val)) {
+		/* Refresh LPA by inverting LPA_LATCH */
+		regmap_read(mpcs->regmap, RG_PCS_AN_STS0, &val);
+		regmap_update_bits(mpcs->regmap, RG_PCS_AN_STS0,
+				   USXGMII_LPA_LATCH,
+				   !(val & USXGMII_LPA_LATCH));
+
+		regmap_read(mpcs->regmap, RG_PCS_AN_STS0, &val);
+
+		state->interface = mpcs->interface;
+		state->link = FIELD_GET(USXGMII_LPA_LINK, val);
+		state->duplex = FIELD_GET(USXGMII_LPA_DUPLEX, val);
+
+		switch (FIELD_GET(USXGMII_LPA_SPEED_MASK, val)) {
+		case USXGMII_LPA_SPEED_10:
+			state->speed = SPEED_10;
+			break;
+		case USXGMII_LPA_SPEED_100:
+			state->speed = SPEED_100;
+			break;
+		case USXGMII_LPA_SPEED_1000:
+			state->speed = SPEED_1000;
+			break;
+		case USXGMII_LPA_SPEED_2500:
+			state->speed = SPEED_2500;
+			break;
+		case USXGMII_LPA_SPEED_5000:
+			state->speed = SPEED_5000;
+			break;
+		case USXGMII_LPA_SPEED_10000:
+			state->speed = SPEED_10000;
+			break;
+		}
+	} else {
+		val = mtk_r32(mac->hw, MTK_XGMAC_STS(mac->id));
+
+		if (mac->id == MTK_GMAC2_ID)
+			val = val >> 16;
+
+		switch (FIELD_GET(MTK_USXGMII_PCS_MODE, val)) {
+		case 0:
+			state->speed = SPEED_10000;
+			break;
+		case 1:
+			state->speed = SPEED_5000;
+			break;
+		case 2:
+			state->speed = SPEED_2500;
+			break;
+		case 3:
+			state->speed = SPEED_1000;
+			break;
+		}
+
+		state->interface = mpcs->interface;
+		state->link = FIELD_GET(MTK_USXGMII_PCS_LINK, val);
+		state->duplex = DUPLEX_FULL;
+	}
+
+	if (state->link == 0)
+		mtk_usxgmii_pcs_config(pcs, MLO_AN_INBAND,
+				       state->interface, NULL, false);
+}
+
+static void mtk_usxgmii_pcs_restart_an(struct phylink_pcs *pcs)
+{
+	struct mtk_usxgmii_pcs *mpcs = pcs_to_mtk_usxgmii_pcs(pcs);
+	unsigned int val = 0;
+
+	if (!mpcs->regmap)
+		return;
+
+	regmap_read(mpcs->regmap, RG_PCS_AN_CTRL0, &val);
+	val |= USXGMII_AN_RESTART;
+	regmap_write(mpcs->regmap, RG_PCS_AN_CTRL0, val);
+}
+
+static void mtk_usxgmii_pcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
+				    phy_interface_t interface,
+				    int speed, int duplex)
+{
+	/* Reconfiguring USXGMII to ensure the quality of the RX signal
+	 * after the line side link up.
+	 */
+	mtk_usxgmii_pcs_config(pcs, mode,
+			       interface, NULL, false);
+}
+
+static const struct phylink_pcs_ops mtk_usxgmii_pcs_ops = {
+	.pcs_config = mtk_usxgmii_pcs_config,
+	.pcs_get_state = mtk_usxgmii_pcs_get_state,
+	.pcs_an_restart = mtk_usxgmii_pcs_restart_an,
+	.pcs_link_up = mtk_usxgmii_pcs_link_up,
+};
+
+int mtk_usxgmii_init(struct mtk_eth *eth)
+{
+	struct device_node *r = eth->dev->of_node;
+	struct device *dev = eth->dev;
+	struct device_node *np;
+	int i, ret;
+
+	eth->usxgmii_pcs = devm_kcalloc(dev, eth->soc->num_devs, sizeof(eth->usxgmii_pcs), GFP_KERNEL);
+	if (!eth->usxgmii_pcs)
+		return -ENOMEM;
+
+	for (i = 0; i < eth->soc->num_devs; i++) {
+		np = of_parse_phandle(r, "mediatek,usxgmiisys", i);
+		if (!np)
+			break;
+
+		eth->usxgmii_pcs[i] = devm_kzalloc(dev, sizeof(*eth->usxgmii_pcs), GFP_KERNEL);
+		if (!eth->usxgmii_pcs[i])
+			return -ENOMEM;
+
+		eth->usxgmii_pcs[i]->id = i;
+		eth->usxgmii_pcs[i]->eth = eth;
+		eth->usxgmii_pcs[i]->regmap = syscon_node_to_regmap(np);
+		if (IS_ERR(eth->usxgmii_pcs[i]->regmap))
+			return PTR_ERR(eth->usxgmii_pcs[i]->regmap);
+
+		eth->usxgmii_pcs[i]->pcs.ops = &mtk_usxgmii_pcs_ops;
+		eth->usxgmii_pcs[i]->pcs.poll = true;
+		eth->usxgmii_pcs[i]->interface = PHY_INTERFACE_MODE_NA;
+
+		of_node_put(np);
+	}
+
+	ret = mtk_xfi_pextp_init(eth);
+	if (ret)
+		return ret;
+
+	ret = mtk_xfi_pll_init(eth);
+	if (ret)
+		return ret;
+
+	return mtk_toprgu_init(eth);
+}
+
+struct phylink_pcs *mtk_usxgmii_select_pcs(struct mtk_eth *eth, int mac_id)
+{
+	u32 xgmii_id = mtk_mac2xgmii_id(eth, mac_id);
+
+	if (!eth->usxgmii_pcs[xgmii_id]->regmap)
+		return NULL;
+
+	return &eth->usxgmii_pcs[xgmii_id]->pcs;
+}