r8152: Add 2500baseT EEE status/configuration support

The r8152 driver supports the RTL8156, which is a 2.5Gbit Ethernet controller for
USB 3.0, for which support is added for configuring and displaying the EEE
advertisement status for 2.5GBit connections.

The patch also corrects the determination of whether EEE is active to include
the 2.5GBit connection status and make the determination dependent not on the
desired speed configuration (tp->speed), but on the actual speed used by
the controller. For consistency, this is corrected also for the RTL8152/3.

This was tested on an Edimax EU-4307 V1.0 USB-Ethernet adapter with RTL8156,
and a SECOMP Value 12.99.1115 USB-C 3.1 Ethernet converter with RTL8153.

Signed-off-by: Birger Koblitz <mail@birger-koblitz.de>
Link: https://patch.msgid.link/20260224-b4-eee2g5-v2-1-cf5c83df036e@birger-koblitz.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 42 insertions, 8 deletions

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 4af85728ac4f..ea7c1eadc864 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -207,6 +207,7 @@
 #define OCP_EEE_LPABLE		0xa5d2
 #define OCP_10GBT_CTRL		0xa5d4
 #define OCP_10GBT_STAT		0xa5d6
+#define OCP_EEE_LPABLE2		0xa6d0
 #define OCP_EEE_ADV2		0xa6d4
 #define OCP_PHY_STATE		0xa708		/* nway state for 8153 */
 #define OCP_PHY_PATCH_STAT	0xb800
@@ -948,6 +949,7 @@ struct r8152 {
 	u16 ocp_base;
 	u16 speed;
 	u16 eee_adv;
+	u16 eee_adv2;
 	u8 *intr_buff;
 	u8 version;
 	u8 duplex;
@@ -5393,7 +5395,7 @@ static void r8156_eee_en(struct r8152 *tp, bool enable)
 
 	config = ocp_reg_read(tp, OCP_EEE_ADV2);
 
-	if (enable)
+	if (enable && (tp->eee_adv2 & MDIO_EEE_2_5GT))
 		config |= MDIO_EEE_2_5GT;
 	else
 		config &= ~MDIO_EEE_2_5GT;
@@ -8922,7 +8924,8 @@ static void rtl8152_get_strings(struct net_device *dev, u32 stringset, u8 *data)
 
 static int r8152_get_eee(struct r8152 *tp, struct ethtool_keee *eee)
 {
-	__ETHTOOL_DECLARE_LINK_MODE_MASK(common);
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(common) = {};
+	u16 speed = rtl8152_get_speed(tp);
 	u16 val;
 
 	val = r8152_mmd_read(tp, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
@@ -8936,8 +8939,14 @@ static int r8152_get_eee(struct r8152 *tp, struct ethtool_keee *eee)
 
 	eee->eee_enabled = tp->eee_en;
 
-	linkmode_and(common, eee->advertised, eee->lp_advertised);
-	eee->eee_active = phy_check_valid(tp->speed, tp->duplex, common);
+	if (speed & _1000bps)
+		linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, common);
+	if (speed & _100bps)
+		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, common);
+
+	linkmode_and(common, common, eee->advertised);
+	linkmode_and(common, common, eee->lp_advertised);
+	eee->eee_active = !linkmode_empty(common);
 
 	return 0;
 }
@@ -8948,7 +8957,10 @@ static int r8152_set_eee(struct r8152 *tp, struct ethtool_keee *eee)
 
 	tp->eee_en = eee->eee_enabled;
 	tp->eee_adv = val;
-
+	if (tp->support_2500full) {
+		val = linkmode_to_mii_eee_cap2_t(eee->advertised);
+		tp->eee_adv2 = val;
+	}
 	rtl_eee_enable(tp, tp->eee_en);
 
 	return 0;
@@ -8956,7 +8968,8 @@ static int r8152_set_eee(struct r8152 *tp, struct ethtool_keee *eee)
 
 static int r8153_get_eee(struct r8152 *tp, struct ethtool_keee *eee)
 {
-	__ETHTOOL_DECLARE_LINK_MODE_MASK(common);
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(common) = {};
+	u16 speed = rtl8152_get_speed(tp);
 	u16 val;
 
 	val = ocp_reg_read(tp, OCP_EEE_ABLE);
@@ -8968,10 +8981,29 @@ static int r8153_get_eee(struct r8152 *tp, struct ethtool_keee *eee)
 	val = ocp_reg_read(tp, OCP_EEE_LPABLE);
 	mii_eee_cap1_mod_linkmode_t(eee->lp_advertised, val);
 
+	if (tp->support_2500full) {
+		linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, eee->supported);
+
+		val = ocp_reg_read(tp, OCP_EEE_ADV2);
+		mii_eee_cap2_mod_linkmode_adv_t(eee->advertised, val);
+
+		val = ocp_reg_read(tp, OCP_EEE_LPABLE2);
+		mii_eee_cap2_mod_linkmode_adv_t(eee->lp_advertised, val);
+
+		if (speed & _2500bps)
+			linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, common);
+	}
+
 	eee->eee_enabled = tp->eee_en;
 
-	linkmode_and(common, eee->advertised, eee->lp_advertised);
-	eee->eee_active = phy_check_valid(tp->speed, tp->duplex, common);
+	if (speed & _1000bps)
+		linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, common);
+	if (speed & _100bps)
+		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, common);
+
+	linkmode_and(common, common, eee->advertised);
+	linkmode_and(common, common, eee->lp_advertised);
+	eee->eee_active = !linkmode_empty(common);
 
 	return 0;
 }
@@ -9512,6 +9544,7 @@ static int rtl_ops_init(struct r8152 *tp)
 	case RTL_VER_11:
 		tp->eee_en		= true;
 		tp->eee_adv		= MDIO_EEE_1000T | MDIO_EEE_100TX;
+		tp->eee_adv2		= MDIO_EEE_2_5GT;
 		fallthrough;
 	case RTL_VER_10:
 		ops->init		= r8156_init;
@@ -9537,6 +9570,7 @@ static int rtl_ops_init(struct r8152 *tp)
 	case RTL_VER_15:
 		tp->eee_en		= true;
 		tp->eee_adv		= MDIO_EEE_1000T | MDIO_EEE_100TX;
+		tp->eee_adv2		= MDIO_EEE_2_5GT;
 		ops->init		= r8156b_init;
 		ops->enable		= rtl8156b_enable;
 		ops->disable		= rtl8153_disable;