From: Markus Stockhausen <markus.stockhausen@gmx.de>
Date: Wed, 7 Jan 2026 07:32:58 +0000 (+0100)
Subject: realtek: phy: add RTL8214FC initialization for RTL839x
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0bab65dfa7c8ab27d0b2c76126e4d1114a92aa10;p=thirdparty%2Fopenwrt.git

realtek: phy: add RTL8214FC initialization for RTL839x

Until now the RTL8214FC is initialized either by U-Boot (all
devices) or by some magic firmware file (RTL838x). On RTL839x
devices without U-Boot (e.g. ZyXEL GS1920) this PHY cannot
be used.

Provide the most basic setup sequence for RTL839x so that
copper/fiber work. Later it can be taken over for all devices
and the firmware helpers can be dropped.

Remark! This should not (but might) break RTL839x devices with
RTL8214FC U-Boot setup.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/21435
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
---

diff --git a/target/linux/realtek/files-6.12/drivers/net/phy/rtl83xx-phy.c b/target/linux/realtek/files-6.12/drivers/net/phy/rtl83xx-phy.c
index 8ac3024439d..046b9cc0d47 100644
--- a/target/linux/realtek/files-6.12/drivers/net/phy/rtl83xx-phy.c
+++ b/target/linux/realtek/files-6.12/drivers/net/phy/rtl83xx-phy.c
@@ -811,20 +811,6 @@ static const struct sfp_upstream_ops rtl8214fc_sfp_ops = {
 	.module_remove = rtl8214fc_sfp_remove,
 };
 
-static int rtl8214fc_phy_probe(struct phy_device *phydev)
-{
-	int ret = 0;
-
-	if (rtl821x_package_join(phydev, 4) == RTL821X_JOIN_LAST) {
-		if (soc_info.family == RTL8380_FAMILY_ID)
-			ret = rtl8380_configure_rtl8214fc(get_base_phy(phydev));
-		if (ret)
-			return ret;
-	}
-
-	return phy_sfp_probe(phydev, &rtl8214fc_sfp_ops);
-}
-
 static int rtl8214c_phy_probe(struct phy_device *phydev)
 {
 	if (rtl821x_package_join(phydev, 4) == RTL821X_JOIN_LAST)
@@ -931,6 +917,58 @@ static int rtl8218b_config_init(struct phy_device *phydev)
 	return 0;
 }
 
+static int rtl8214fc_config_init(struct phy_device *phydev)
+{
+	static int regs[] = {16, 19, 20, 21};
+	struct phy_device *portphy;
+	int port;
+
+	/* Hardware is similar to RTL8218B reuse coding for serdes and copper init */
+	rtl8218b_config_init(phydev);
+
+	if (phydev->mdio.addr % 8)
+		return 0;
+
+	for (port = 0; port < 4; port++) {
+		portphy = get_package_phy(phydev, port);
+
+		phy_write(phydev, RTL821XEXT_MEDIA_PAGE_SELECT, 0x8);
+		/* setup basic fiber control in base phy and default to copper */
+		phy_write_paged(phydev, 0x266, regs[port], 0x0f95);
+		phy_write(phydev, RTL821XEXT_MEDIA_PAGE_SELECT, 0x0);
+
+		phy_write(portphy, RTL821XEXT_MEDIA_PAGE_SELECT, 0x3);
+		/* set fiber SerDes RX to negative edge */
+		phy_modify_paged(portphy, 0x8, 0x17, 0, BIT(14));
+		/* auto negotiation disable link on */
+		phy_modify_paged(portphy, 0x8, 0x14, 0, BIT(2));
+		/* disable fiber 100MBit */
+		phy_modify_paged(portphy, 0x8, 0x11, BIT(5), 0);
+		phy_write(portphy, RTL821XEXT_MEDIA_PAGE_SELECT, 0x0);
+
+		/* Disable EEE. 0xa5d/0x10 is the same as MDIO_MMD_AN / MDIO_AN_EEE_ADV */
+		phy_write_paged(portphy, 0xa5d, 0x10, 0x0000);
+	}
+
+	return 0;
+}
+
+static int rtl8214fc_phy_probe(struct phy_device *phydev)
+{
+	int ret = 0;
+
+	if (rtl821x_package_join(phydev, 4) == RTL821X_JOIN_LAST) {
+		if (soc_info.family == RTL8380_FAMILY_ID)
+			ret = rtl8380_configure_rtl8214fc(get_base_phy(phydev));
+		else if (soc_info.family == RTL8390_FAMILY_ID)
+			ret = rtl8214fc_config_init(get_base_phy(phydev));
+		if (ret)
+			return ret;
+	}
+
+	return phy_sfp_probe(phydev, &rtl8214fc_sfp_ops);
+}
+
 static struct phy_driver rtl83xx_phy_driver[] = {
 	{
 		PHY_ID_MATCH_EXACT(PHY_ID_RTL8214C),