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From b6a709cb51f7bdc55c01cec886098a9753ce8c28 Mon Sep 17 00:00:00 2001
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Date: Thu, 27 Oct 2022 14:10:42 +0100
Subject: [PATCH 01/10] net: mtk_eth_soc: add definitions for PCS
As a result of help from Frank Wunderlich to investigate and test, we
know a bit more about the PCS on the Mediatek platforms. Update the
definitions from this investigation.
This PCS appears similar, but not identical to the Lynx PCS.
Although not included in this patch, but for future reference, the PHY
ID registers at offset 4 read as 0x4d544950 'MTIP'.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.h | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -501,8 +501,10 @@
#define ETHSYS_DMA_AG_MAP_PPE BIT(2)
/* SGMII subsystem config registers */
-/* Register to auto-negotiation restart */
+/* BMCR (low 16) BMSR (high 16) */
#define SGMSYS_PCS_CONTROL_1 0x0
+#define SGMII_BMCR GENMASK(15, 0)
+#define SGMII_BMSR GENMASK(31, 16)
#define SGMII_AN_RESTART BIT(9)
#define SGMII_ISOLATE BIT(10)
#define SGMII_AN_ENABLE BIT(12)
@@ -512,13 +514,18 @@
#define SGMII_PCS_FAULT BIT(23)
#define SGMII_AN_EXPANSION_CLR BIT(30)
+#define SGMSYS_PCS_ADVERTISE 0x8
+#define SGMII_ADVERTISE GENMASK(15, 0)
+#define SGMII_LPA GENMASK(31, 16)
+
/* Register to programmable link timer, the unit in 2 * 8ns */
#define SGMSYS_PCS_LINK_TIMER 0x18
-#define SGMII_LINK_TIMER_DEFAULT (0x186a0 & GENMASK(19, 0))
+#define SGMII_LINK_TIMER_MASK GENMASK(19, 0)
+#define SGMII_LINK_TIMER_DEFAULT (0x186a0 & SGMII_LINK_TIMER_MASK)
/* Register to control remote fault */
#define SGMSYS_SGMII_MODE 0x20
-#define SGMII_IF_MODE_BIT0 BIT(0)
+#define SGMII_IF_MODE_SGMII BIT(0)
#define SGMII_SPEED_DUPLEX_AN BIT(1)
#define SGMII_SPEED_MASK GENMASK(3, 2)
#define SGMII_SPEED_10 FIELD_PREP(SGMII_SPEED_MASK, 0)
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