[SRU][R][PATCH 5/7] UBUNTU: SAUCE: r8169: add ltr support for RTL8116af

[AceLan Kao]

From: Javen Xu <javen_xu at realsil.com.cn>

BugLink: https://bugs.launchpad.net/bugs/2160475

This patch adds ltr support for RTL8116af, enables RTL8116af enter l1.2
state. This makes sense for the system to enter c10 state.

Signed-off-by: Javen Xu <javen_xu at realsil.com.cn>
(cherry picked from commit https://lore.kernel.org/netdev/20260603065916.334-5-javen_xu@realsil.com.cn/)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 31 +++++++++++++++++++----
 1 file changed, 26 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index a0f76cac4cad..514e1a413d2f 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -331,11 +331,13 @@ enum rtl_registers {
 	ALDPS_LTR	= 0xe0a2,
 	LTR_OBFF_LOCK	= 0xe032,
 	LTR_SNOOP	= 0xe034,
+	SEND_LTR_MSG	= 0xe038,
 
 #define ALDPS_LTR_EN			BIT(0)
 #define LTR_OBFF_LOCK_EN		BIT(0)
 #define LINK_SPEED_CHANGE_EN		BIT(14)
 #define LTR_SNOOP_EN			GENMASK(15, 14)
+#define LTR_MSG_EN			BIT(0)
 };
 
 enum rtl8168_8101_registers {
@@ -3149,8 +3151,22 @@ static void rtl_enable_ltr(struct rtl8169_private *tp)
 		r8168_mac_ocp_write(tp, 0xcdf2, 0x9003);
 		r8168_mac_ocp_modify(tp, LTR_OBFF_LOCK, 0x0000, LINK_SPEED_CHANGE_EN);
 		break;
-	case RTL_GIGA_MAC_VER_46 ... RTL_GIGA_MAC_VER_48:
 	case RTL_GIGA_MAC_VER_52:
+		r8168_mac_ocp_write(tp, 0xcdd0, 0x9003);
+		r8168_mac_ocp_modify(tp, LTR_SNOOP, 0x0000, LTR_SNOOP_EN);
+		r8168_mac_ocp_write(tp, 0xe02c, 0x1880);
+		r8168_mac_ocp_write(tp, 0xe02e, 0x4880);
+		r8168_mac_ocp_modify(tp, ALDPS_LTR, 0x0000, ALDPS_LTR_EN);
+		r8168_mac_ocp_write(tp, 0xcdd8, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdda, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcddc, 0x9003);
+		r8168_mac_ocp_write(tp, 0xcdd2, 0x883c);
+		r8168_mac_ocp_write(tp, 0xcdd4, 0x8c12);
+		r8168_mac_ocp_write(tp, 0xcdd6, 0x9003);
+		r8168_mac_ocp_write(tp, 0xe0a6, 0x9003);
+		r8168_mac_ocp_write(tp, 0xe0a8, 0x9003);
+		break;
+	case RTL_GIGA_MAC_VER_46 ... RTL_GIGA_MAC_VER_48:
 		r8168_mac_ocp_modify(tp, ALDPS_LTR, 0x0000, ALDPS_LTR_EN);
 		RTL_W8(tp, COMBO_LTR_EXTEND, RTL_R8(tp, COMBO_LTR_EXTEND) | COMBO_LTR_EXTEND_EN);
 		fallthrough;
@@ -3170,6 +3186,7 @@ static void rtl_enable_ltr(struct rtl8169_private *tp)
 	}
 	/* chip can trigger LTR */
 	r8168_mac_ocp_modify(tp, LTR_OBFF_LOCK, 0x0003, LTR_OBFF_LOCK_EN);
+	r8168_mac_ocp_modify(tp, SEND_LTR_MSG, 0x0000, LTR_MSG_EN);
 }
 
 static void rtl_hw_aspm_clkreq_enable(struct rtl8169_private *tp, bool enable)
@@ -3203,6 +3220,7 @@ static void rtl_hw_aspm_clkreq_enable(struct rtl8169_private *tp, bool enable)
 		rtl_enable_ltr(tp);
 		switch (tp->mac_version) {
 		case RTL_GIGA_MAC_VER_46 ... RTL_GIGA_MAC_VER_48:
+		case RTL_GIGA_MAC_VER_52:
 		case RTL_GIGA_MAC_VER_61 ... RTL_GIGA_MAC_VER_LAST:
 			/* reset ephy tx/rx disable timer */
 			r8168_mac_ocp_modify(tp, 0xe094, 0xff00, 0);
@@ -3215,6 +3233,7 @@ static void rtl_hw_aspm_clkreq_enable(struct rtl8169_private *tp, bool enable)
 	} else {
 		switch (tp->mac_version) {
 		case RTL_GIGA_MAC_VER_46 ... RTL_GIGA_MAC_VER_48:
+		case RTL_GIGA_MAC_VER_52:
 		case RTL_GIGA_MAC_VER_61 ... RTL_GIGA_MAC_VER_LAST:
 			r8168_mac_ocp_modify(tp, 0xe092, 0x00ff, 0);
 			break;
@@ -3728,7 +3747,9 @@ static void rtl_hw_start_8117(struct rtl8169_private *tp)
 
 	rtl_eri_set_bits(tp, 0xd4, 0x0010);
 
-	rtl_eri_write(tp, 0x5f0, ERIAR_MASK_0011, 0x4f87);
+	rtl_eri_write(tp, 0x5f0, ERIAR_MASK_0011, 0x4000);
+
+	r8168_mac_ocp_write(tp, 0xe098, 0xc302);
 
 	rtl_disable_rxdvgate(tp);
 
@@ -3753,9 +3774,9 @@ static void rtl_hw_start_8117(struct rtl8169_private *tp)
 	}
 
 	r8168_mac_ocp_modify(tp, 0xe056, 0x00f0, 0x0000);
-	r8168_mac_ocp_write(tp, 0xea80, 0x0003);
-	r8168_mac_ocp_modify(tp, 0xe052, 0x0000, 0x0009);
-	r8168_mac_ocp_modify(tp, 0xd420, 0x0fff, 0x047f);
+	r8168_mac_ocp_write(tp, 0xea80, 0x0000);
+	r8168_mac_ocp_modify(tp, 0xe052, 0x0009, 0x0000);
+	r8168_mac_ocp_modify(tp, 0xd420, 0x0fff, 0x045f);
 
 	r8168_mac_ocp_write(tp, 0xe63e, 0x0001);
 	r8168_mac_ocp_write(tp, 0xe63e, 0x0000);
-- 
2.53.0