From cbfed00575d15eafd85efd9619b7ecc0836a4aa7 Mon Sep 17 00:00:00 2001
From: Alexander Couzens <lynxis@fe80.eu>
Date: Sat, 13 Aug 2022 14:42:12 +0200
Subject: [PATCH 04/10] net: mtk_sgmii: implement mtk_pcs_ops

Implement mtk_pcs_ops for the SGMII pcs to read the current state
of the hardware.

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
[added DUPLEX_FULL]
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 drivers/net/ethernet/mediatek/mtk_sgmii.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

--- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
+++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
@@ -139,10 +139,28 @@ static void mtk_pcs_link_up(struct phyli
 	regmap_write(mpcs->regmap, SGMSYS_SGMII_MODE, val);
 }
 
+static void mtk_pcs_get_state(struct phylink_pcs *pcs, struct phylink_link_state *state)
+{
+	struct mtk_pcs *mpcs = pcs_to_mtk_pcs(pcs);
+	unsigned int val;
+
+	regmap_read(mpcs->regmap, SGMSYS_PCS_CONTROL_1, &val);
+	state->an_complete = !!(val & SGMII_AN_COMPLETE);
+	state->link = !!(val & SGMII_LINK_STATYS);
+	if (!state->link)
+		return;
+
+	regmap_read(mpcs->regmap, mpcs->ana_rgc3, &val);
+	state->speed = val & RG_PHY_SPEED_3_125G ? SPEED_2500 : SPEED_1000;
+	state->duplex = DUPLEX_FULL;
+	state->pause = 0;
+}
+
 static const struct phylink_pcs_ops mtk_pcs_ops = {
 	.pcs_config = mtk_pcs_config,
 	.pcs_an_restart = mtk_pcs_restart_an,
 	.pcs_link_up = mtk_pcs_link_up,
+	.pcs_get_state = mtk_pcs_get_state,
 };
 
 int mtk_sgmii_init(struct mtk_sgmii *ss, struct device_node *r, u32 ana_rgc3)
