netdev - [PATCH net-next v1 1/1] net: phy: microchip: lan937x: add support for 100BaseTX PHY

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240704135850.3939342-1-o.rempel@pengutronix.de>
Date: Thu,  4 Jul 2024 15:58:50 +0200
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: "David S. Miller" <davem@...emloft.net>,
	Andrew Lunn <andrew@...n.ch>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Woojung Huh <woojung.huh@...rochip.com>,
	Arun Ramadoss <arun.ramadoss@...rochip.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Yuiko Oshino <yuiko.oshino@...rochip.com>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>,
	kernel@...gutronix.de,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	UNGLinuxDriver@...rochip.com
Subject: [PATCH net-next v1 1/1] net: phy: microchip: lan937x: add support for 100BaseTX PHY

Add support of 100BaseTX PHY build in to LAN9371 and LAN9372 switches.

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 drivers/net/phy/microchip_t1.c | 74 ++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/drivers/net/phy/microchip_t1.c b/drivers/net/phy/microchip_t1.c
index a35528497a576..c7ca0d04b9e1b 100644
--- a/drivers/net/phy/microchip_t1.c
+++ b/drivers/net/phy/microchip_t1.c
@@ -12,6 +12,7 @@
 
 #define PHY_ID_LAN87XX				0x0007c150
 #define PHY_ID_LAN937X				0x0007c180
+#define PHY_ID_LAN937X_TX			0x0007c190
 
 /* External Register Control Register */
 #define LAN87XX_EXT_REG_CTL                     (0x14)
@@ -94,6 +95,10 @@
 /* SQI defines */
 #define LAN87XX_MAX_SQI			0x07
 
+#define LAN937X_MODE_CTRL_STATUS_REG	0x11
+#define LAN937X_AUTOMDIX_EN		BIT(7)
+#define LAN937X_MDI_MODE		BIT(6)
+
 #define DRIVER_AUTHOR	"Nisar Sayed <nisar.sayed@...rochip.com>"
 #define DRIVER_DESC	"Microchip LAN87XX/LAN937x T1 PHY driver"
 
@@ -860,6 +865,66 @@ static int lan87xx_get_sqi_max(struct phy_device *phydev)
 	return LAN87XX_MAX_SQI;
 }
 
+static int lan937x_tx_read_status(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = genphy_read_status(phydev);
+	if (ret < 0)
+		return ret;
+
+	ret = phy_read(phydev, LAN937X_MODE_CTRL_STATUS_REG);
+	if (ret < 0)
+		return ret;
+
+	if (ret & LAN937X_AUTOMDIX_EN) {
+		phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
+		/* MDI/MDIX status is unknown */
+		phydev->mdix = ETH_TP_MDI_INVALID;
+	} else if (ret & LAN937X_MDI_MODE) {
+		phydev->mdix_ctrl = ETH_TP_MDI_X;
+		phydev->mdix = ETH_TP_MDI_X;
+	} else {
+		phydev->mdix_ctrl = ETH_TP_MDI;
+		phydev->mdix = ETH_TP_MDI;
+	}
+
+	return 0;
+}
+
+static int lan937x_tx_config_mdix(struct phy_device *phydev, u8 ctrl)
+{
+	u16 val;
+
+	switch (ctrl) {
+	case ETH_TP_MDI:
+		val = 0;
+		break;
+	case ETH_TP_MDI_X:
+		val = LAN937X_MDI_MODE;
+		break;
+	case ETH_TP_MDI_AUTO:
+		val = LAN937X_AUTOMDIX_EN;
+		break;
+	default:
+		return 0;
+	}
+
+	return phy_modify(phydev, LAN937X_MODE_CTRL_STATUS_REG,
+			  LAN937X_AUTOMDIX_EN | LAN937X_MDI_MODE, val);
+}
+
+static int lan937x_tx_config_aneg(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = genphy_config_aneg(phydev);
+	if (ret)
+		return ret;
+
+	return lan937x_tx_config_mdix(phydev, phydev->mdix_ctrl);
+}
+
 static struct phy_driver microchip_t1_phy_driver[] = {
 	{
 		PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX),
@@ -894,6 +959,14 @@ static struct phy_driver microchip_t1_phy_driver[] = {
 		.get_sqi_max	= lan87xx_get_sqi_max,
 		.cable_test_start = lan87xx_cable_test_start,
 		.cable_test_get_status = lan87xx_cable_test_get_status,
+	},
+	{
+		PHY_ID_MATCH_MODEL(PHY_ID_LAN937X_TX),
+		.name		= "Microchip LAN937x TX",
+		.suspend	= genphy_suspend,
+		.resume		= genphy_resume,
+		.config_aneg	= lan937x_tx_config_aneg,
+		.read_status	= lan937x_tx_read_status,
 	}
 };
 
@@ -902,6 +975,7 @@ module_phy_driver(microchip_t1_phy_driver);
 static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
 	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX) },
 	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN937X) },
+	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN937X_TX) },
 	{ }
 };
 
-- 
2.39.2