linux-kernel - [PATCH net-next v3 2/2] dsa: lan9303: Move to PHYLINK

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Message-ID: <20221206183500.6898-3-jerry.ray@microchip.com>
Date:   Tue, 6 Dec 2022 12:35:00 -0600
From:   Jerry Ray <jerry.ray@...rochip.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "Paolo Abeni" <pabeni@...hat.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux@...linux.org.uk>,
        Jerry Ray <jerry.ray@...rochip.com>
Subject: [PATCH net-next v3 2/2] dsa: lan9303: Move to PHYLINK

This patch replaces the .adjust_link api with the .phylink_get_caps api.

Signed-off-by: Jerry Ray <jerry.ray@...rochip.com>
---
v2-> v3:
  Added back in disabling Turbo Mode on the CPU MII interface.
  Removed the unnecessary clearing of the phy supported interfaces.
---
 drivers/net/dsa/lan9303-core.c | 79 ++++++++++++++++++----------------
 1 file changed, 42 insertions(+), 37 deletions(-)

diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index baa336bb9d15..c6236b328ed8 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -886,6 +886,13 @@ static int lan9303_check_device(struct lan9303 *chip)
 		return ret;
 	}
 
+	/* Virtual Phy: Always disable Turbo 200Mbit mode */
+	ret = lan9303_read(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, &reg);
+	if (ret)
+		return ret;
+	reg &= ~LAN9303_VIRT_SPECIAL_TURBO;
+	regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, reg);
+
 	return 0;
 }
 
@@ -1047,42 +1054,6 @@ static int lan9303_phy_write(struct dsa_switch *ds, int phy, int regnum,
 	return chip->ops->phy_write(chip, phy, regnum, val);
 }
 
-static void lan9303_adjust_link(struct dsa_switch *ds, int port,
-				struct phy_device *phydev)
-{
-	struct lan9303 *chip = ds->priv;
-	int ctl;
-
-	if (!phy_is_pseudo_fixed_link(phydev))
-		return;
-
-	ctl = lan9303_phy_read(ds, port, MII_BMCR);
-
-	ctl &= ~BMCR_ANENABLE;
-
-	if (phydev->speed == SPEED_100)
-		ctl |= BMCR_SPEED100;
-	else if (phydev->speed == SPEED_10)
-		ctl &= ~BMCR_SPEED100;
-	else
-		dev_err(ds->dev, "unsupported speed: %d\n", phydev->speed);
-
-	if (phydev->duplex == DUPLEX_FULL)
-		ctl |= BMCR_FULLDPLX;
-	else
-		ctl &= ~BMCR_FULLDPLX;
-
-	lan9303_phy_write(ds, port, MII_BMCR, ctl);
-
-	if (port == chip->phy_addr_base) {
-		/* Virtual Phy: Remove Turbo 200Mbit mode */
-		lan9303_read(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, &ctl);
-
-		ctl &= ~LAN9303_VIRT_SPECIAL_TURBO;
-		regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, ctl);
-	}
-}
-
 static int lan9303_port_enable(struct dsa_switch *ds, int port,
 			       struct phy_device *phy)
 {
@@ -1279,6 +1250,40 @@ static int lan9303_port_mdb_del(struct dsa_switch *ds, int port,
 	return 0;
 }
 
+static void lan9303_phylink_get_caps(struct dsa_switch *ds, int port,
+				     struct phylink_config *config)
+{
+	struct lan9303 *chip = ds->priv;
+
+	dev_dbg(chip->dev, "%s(%d) entered.", __func__, port);
+
+	config->mac_capabilities = MAC_10 | MAC_100 | MAC_ASYM_PAUSE |
+				   MAC_SYM_PAUSE;
+
+	if (dsa_port_is_cpu(dsa_to_port(ds, port))) {
+		/* cpu port */
+		__set_bit(PHY_INTERFACE_MODE_RMII,
+			  config->supported_interfaces);
+		__set_bit(PHY_INTERFACE_MODE_MII,
+			  config->supported_interfaces);
+	} else {
+		/* internal ports */
+		__set_bit(PHY_INTERFACE_MODE_INTERNAL,
+			  config->supported_interfaces);
+		/* Compatibility for phylib's default interface type when the
+		 * phy-mode property is absent
+		 */
+		__set_bit(PHY_INTERFACE_MODE_GMII,
+			  config->supported_interfaces);
+	}
+
+	/* This driver does not make use of the speed, duplex, pause or the
+	 * advertisement in its mac_config, so it is safe to mark this driver
+	 * as non-legacy.
+	 */
+	config->legacy_pre_march2020 = false;
+}
+
 /* For non-cpu ports, the max frame size is 1518.
  * The CPU port supports a max frame size of 1522.
  * There is a JUMBO flag to make the max size 2048, but this driver
@@ -1304,7 +1309,7 @@ static const struct dsa_switch_ops lan9303_switch_ops = {
 	.get_strings = lan9303_get_strings,
 	.phy_read = lan9303_phy_read,
 	.phy_write = lan9303_phy_write,
-	.adjust_link = lan9303_adjust_link,
+	.phylink_get_caps	= lan9303_phylink_get_caps,
 	.get_ethtool_stats = lan9303_get_ethtool_stats,
 	.get_sset_count = lan9303_get_sset_count,
 	.port_enable = lan9303_port_enable,
-- 
2.17.1