netdev - [PATCH net-next 3/3] net: phy: aquantia: inform about proprietary 1000Base-T2 mode being in use

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Message-ID: <164d7cbc-0ac2-67ab-b94d-9259b2fb4bd8@gmail.com>
Date:   Sat, 23 Mar 2019 14:16:23 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Miller <davem@...emloft.net>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next 3/3] net: phy: aquantia: inform about proprietary
 1000Base-T2 mode being in use

The AQCS109 supports a proprietary 2-pair 1Gbps mode. The standard
registers don't allow to tell between 1000BaseT and 1000BaseT2.
Add reporting this proprietary mode based on a vendor register.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/phy/aquantia_main.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/aquantia_main.c b/drivers/net/phy/aquantia_main.c
index 01a6d5cd4..1013711e1 100644
--- a/drivers/net/phy/aquantia_main.c
+++ b/drivers/net/phy/aquantia_main.c
@@ -78,6 +78,10 @@
 #define VEND1_GLOBAL_RSVD_STAT1_FW_BUILD_ID	GENMASK(7, 4)
 #define VEND1_GLOBAL_RSVD_STAT1_PROV_ID		GENMASK(3, 0)
 
+#define VEND1_GLOBAL_RSVD_STAT9			0xc88d
+#define VEND1_GLOBAL_RSVD_STAT9_MODE		GENMASK(7, 0)
+#define VEND1_GLOBAL_RSVD_STAT9_1000BT2		0x23
+
 #define VEND1_GLOBAL_INT_STD_STATUS		0xfc00
 #define VEND1_GLOBAL_INT_VEND_STATUS		0xfc01
 
@@ -448,7 +452,7 @@ static void aqr107_link_change_notify(struct phy_device *phydev)
 {
 	u8 fw_major, fw_minor;
 	bool downshift, short_reach, afr;
-	int val;
+	int mode, val;
 
 	if (phydev->state != PHY_RUNNING || phydev->autoneg == AUTONEG_DISABLE)
 		return;
@@ -479,6 +483,14 @@ static void aqr107_link_change_notify(struct phy_device *phydev)
 		   short_reach ? ", short reach mode" : "",
 		   downshift ? ", fast-retrain downshift advertised" : "",
 		   afr ? ", fast reframe advertised" : "");
+
+	val = phy_read_mmd(phydev, MDIO_MMD_VEND1, VEND1_GLOBAL_RSVD_STAT9);
+	if (val < 0)
+		return;
+
+	mode = FIELD_GET(VEND1_GLOBAL_RSVD_STAT9_MODE, val);
+	if (mode == VEND1_GLOBAL_RSVD_STAT9_1000BT2)
+		phydev_info(phydev, "Aquantia 1000Base-T2 mode active\n");
 }
 
 static struct phy_driver aqr_driver[] = {
-- 
2.21.0