From e4e5ce823bdd4601bd75ae7c206ae35e7c2fa60b Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Fri, 17 Oct 2025 11:06:22 +0200
Subject: [PATCH 12/12] net: airoha: Add AN7583 SoC support

Introduce support for AN7583 ethernet controller to airoha-eth dirver.

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20251017-an7583-eth-support-v3-13-f28319666667@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
 drivers/net/ethernet/airoha/airoha_eth.c | 68 ++++++++++++++++++++++--
 drivers/net/ethernet/airoha/airoha_eth.h | 11 ++++
 drivers/net/ethernet/airoha/airoha_ppe.c |  3 ++
 3 files changed, 77 insertions(+), 5 deletions(-)

--- a/drivers/net/ethernet/airoha/airoha_eth.c
+++ b/drivers/net/ethernet/airoha/airoha_eth.c
@@ -1690,10 +1690,8 @@ static int airoha_dev_set_macaddr(struct
 
 static int airhoha_set_gdm2_loopback(struct airoha_gdm_port *port)
 {
-	u32 val, pse_port, chan = port->id == AIROHA_GDM3_IDX ? 4 : 0;
 	struct airoha_eth *eth = port->qdma->eth;
-	/* XXX: handle XSI_USB_PORT and XSI_PCE1_PORT */
-	u32 nbq = port->id == AIROHA_GDM3_IDX ? 4 : 0;
+	u32 val, pse_port, chan, nbq;
 	int src_port;
 
 	/* Forward the traffic to the proper GDM port */
@@ -1705,6 +1703,8 @@ static int airhoha_set_gdm2_loopback(str
 	/* Enable GDM2 loopback */
 	airoha_fe_wr(eth, REG_GDM_TXCHN_EN(2), 0xffffffff);
 	airoha_fe_wr(eth, REG_GDM_RXCHN_EN(2), 0xffff);
+
+	chan = port->id == AIROHA_GDM3_IDX ? airoha_is_7581(eth) ? 4 : 3 : 0;
 	airoha_fe_rmw(eth, REG_GDM_LPBK_CFG(2),
 		      LPBK_CHAN_MASK | LPBK_MODE_MASK | LPBK_EN_MASK,
 		      FIELD_PREP(LPBK_CHAN_MASK, chan) |
@@ -1719,6 +1719,8 @@ static int airhoha_set_gdm2_loopback(str
 	airoha_fe_clear(eth, REG_FE_VIP_PORT_EN, BIT(2));
 	airoha_fe_clear(eth, REG_FE_IFC_PORT_EN, BIT(2));
 
+	/* XXX: handle XSI_USB_PORT and XSI_PCE1_PORT */
+	nbq = port->id == AIROHA_GDM3_IDX && airoha_is_7581(eth) ? 4 : 0;
 	src_port = eth->soc->ops.get_src_port_id(port, nbq);
 	if (src_port < 0)
 		return src_port;
@@ -1732,7 +1734,7 @@ static int airhoha_set_gdm2_loopback(str
 		      SP_CPORT_MASK(val),
 		      FE_PSE_PORT_CDM2 << __ffs(SP_CPORT_MASK(val)));
 
-	if (port->id != AIROHA_GDM3_IDX)
+	if (port->id != AIROHA_GDM3_IDX && airoha_is_7581(eth))
 		airoha_fe_rmw(eth, REG_SRC_PORT_FC_MAP6,
 			      FC_ID_OF_SRC_PORT24_MASK,
 			      FIELD_PREP(FC_ID_OF_SRC_PORT24_MASK, 2));
@@ -1901,6 +1903,22 @@ static bool airoha_dev_tx_queue_busy(str
 	return index >= tail;
 }
 
+static int airoha_get_fe_port(struct airoha_gdm_port *port)
+{
+	struct airoha_qdma *qdma = port->qdma;
+	struct airoha_eth *eth = qdma->eth;
+
+	switch (eth->soc->version) {
+	case 0x7583:
+		return port->id == AIROHA_GDM3_IDX ? FE_PSE_PORT_GDM3
+						   : port->id;
+	case 0x7581:
+	default:
+		return port->id == AIROHA_GDM4_IDX ? FE_PSE_PORT_GDM4
+						   : port->id;
+	}
+}
+
 static netdev_tx_t airoha_dev_xmit(struct sk_buff *skb,
 				   struct net_device *dev)
 {
@@ -1941,7 +1959,7 @@ static netdev_tx_t airoha_dev_xmit(struc
 		}
 	}
 
-	fport = port->id == 4 ? FE_PSE_PORT_GDM4 : port->id;
+	fport = airoha_get_fe_port(port);
 	msg1 = FIELD_PREP(QDMA_ETH_TXMSG_FPORT_MASK, fport) |
 	       FIELD_PREP(QDMA_ETH_TXMSG_METER_MASK, 0x7f);
 
@@ -3103,6 +3121,35 @@ static int airoha_en7581_get_src_port_id
 	return -EINVAL;
 }
 
+static const char * const an7583_xsi_rsts_names[] = {
+	"xsi-mac",
+	"hsi0-mac",
+	"hsi1-mac",
+	"xfp-mac",
+};
+
+static int airoha_an7583_get_src_port_id(struct airoha_gdm_port *port, int nbq)
+{
+	switch (port->id) {
+	case 3:
+		/* 7583 SoC supports eth serdes on GDM3 port */
+		if (!nbq)
+			return HSGMII_LAN_7583_ETH_SRCPORT;
+		break;
+	case 4:
+		/* 7583 SoC supports PCIe and USB serdes on GDM4 port */
+		if (!nbq)
+			return HSGMII_LAN_7583_PCIE_SRCPORT;
+		if (nbq == 1)
+			return HSGMII_LAN_7583_USB_SRCPORT;
+		break;
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
 static const struct airoha_eth_soc_data en7581_soc_data = {
 	.version = 0x7581,
 	.xsi_rsts_names = en7581_xsi_rsts_names,
@@ -3113,8 +3160,19 @@ static const struct airoha_eth_soc_data
 	},
 };
 
+static const struct airoha_eth_soc_data an7583_soc_data = {
+	.version = 0x7583,
+	.xsi_rsts_names = an7583_xsi_rsts_names,
+	.num_xsi_rsts = ARRAY_SIZE(an7583_xsi_rsts_names),
+	.num_ppe = 1,
+	.ops = {
+		.get_src_port_id = airoha_an7583_get_src_port_id,
+	},
+};
+
 static const struct of_device_id of_airoha_match[] = {
 	{ .compatible = "airoha,en7581-eth", .data = &en7581_soc_data },
+	{ .compatible = "airoha,an7583-eth", .data = &an7583_soc_data },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, of_airoha_match);
--- a/drivers/net/ethernet/airoha/airoha_eth.h
+++ b/drivers/net/ethernet/airoha/airoha_eth.h
@@ -74,6 +74,12 @@ enum {
 };
 
 enum {
+	HSGMII_LAN_7583_ETH_SRCPORT	= 0x16,
+	HSGMII_LAN_7583_PCIE_SRCPORT	= 0x18,
+	HSGMII_LAN_7583_USB_SRCPORT,
+};
+
+enum {
 	XSI_PCIE0_VIP_PORT_MASK	= BIT(22),
 	XSI_PCIE1_VIP_PORT_MASK	= BIT(23),
 	XSI_USB_VIP_PORT_MASK	= BIT(25),
@@ -629,6 +635,11 @@ static inline bool airoha_is_7581(struct
 	return eth->soc->version == 0x7581;
 }
 
+static inline bool airoha_is_7583(struct airoha_eth *eth)
+{
+	return eth->soc->version == 0x7583;
+}
+
 bool airoha_is_valid_gdm_port(struct airoha_eth *eth,
 			      struct airoha_gdm_port *port);
 
--- a/drivers/net/ethernet/airoha/airoha_ppe.c
+++ b/drivers/net/ethernet/airoha/airoha_ppe.c
@@ -37,6 +37,9 @@ static int airoha_ppe_get_num_stats_entr
 	if (!IS_ENABLED(CONFIG_NET_AIROHA_FLOW_STATS))
 		return -EOPNOTSUPP;
 
+	if (airoha_is_7583(ppe->eth))
+		return -EOPNOTSUPP;
+
 	return PPE_STATS_NUM_ENTRIES;
 }
 
