netdev - [PATCH net-next v3 2/4] net: phy: add genphy_c45_an_config

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Date:   Sun, 17 Feb 2019 10:29:19 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        David Miller <davem@...emloft.net>,
        Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net-next v3 2/4] net: phy: add genphy_c45_an_config_aneg

From: Andrew Lunn <andrew@...n.ch>
C45 configuration of 10/100 and multi-giga bit auto negotiation
advertisement is standardized. Configuration of 1000Base-T however
appears to be vendor specific. Move the generic code out of the
Marvell driver into the common phy-c45.c file.

v2:
- change function name to genphy_c45_an_config_aneg

Signed-off-by: Andrew Lunn <andrew@...n.ch>
[hkallweit1@...il.com: use new helper linkmode_adv_to_mii_10gbt_adv_t and split patch]
Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/phy/phy-c45.c | 44 +++++++++++++++++++++++++++++++++++++++
 include/linux/phy.h       |  1 +
 2 files changed, 45 insertions(+)

diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c
index 98a04d4cd..16636d49b 100644
--- a/drivers/net/phy/phy-c45.c
+++ b/drivers/net/phy/phy-c45.c
@@ -78,6 +78,50 @@ int genphy_c45_pma_setup_forced(struct phy_device *phydev)
 }
 EXPORT_SYMBOL_GPL(genphy_c45_pma_setup_forced);
 
+/**
+ * genphy_c45_an_config_aneg - configure advertisement registers
+ * @phydev: target phy_device struct
+ *
+ * Configure advertisement registers based on modes set in phydev->advertising
+ *
+ * Returns negative errno code on failure, 0 if advertisement didn't change,
+ * or 1 if advertised modes changed.
+ */
+int genphy_c45_an_config_aneg(struct phy_device *phydev)
+{
+	int changed = 0, ret;
+	u32 adv;
+
+	linkmode_and(phydev->advertising, phydev->advertising,
+		     phydev->supported);
+
+	adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
+
+	ret = phy_modify_mmd(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE,
+			     ADVERTISE_ALL | ADVERTISE_100BASE4 |
+			     ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
+			     adv);
+	if (ret < 0)
+		return ret;
+	if (ret > 0)
+		changed = 1;
+
+	adv = linkmode_adv_to_mii_10gbt_adv_t(phydev->advertising);
+
+	ret = phy_modify_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
+			     MDIO_AN_10GBT_CTRL_ADV10G |
+			     MDIO_AN_10GBT_CTRL_ADV5G |
+			     MDIO_AN_10GBT_CTRL_ADV2_5G,
+			     adv);
+	if (ret < 0)
+		return ret;
+	if (ret > 0)
+		changed = 1;
+
+	return changed;
+}
+EXPORT_SYMBOL_GPL(genphy_c45_an_config_aneg);
+
 /**
  * genphy_c45_an_disable_aneg - disable auto-negotiation
  * @phydev: target phy_device struct
diff --git a/include/linux/phy.h b/include/linux/phy.h
index bf1070c2a..3db507e68 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1101,6 +1101,7 @@ int genphy_c45_read_link(struct phy_device *phydev);
 int genphy_c45_read_lpa(struct phy_device *phydev);
 int genphy_c45_read_pma(struct phy_device *phydev);
 int genphy_c45_pma_setup_forced(struct phy_device *phydev);
+int genphy_c45_an_config_aneg(struct phy_device *phydev);
 int genphy_c45_an_disable_aneg(struct phy_device *phydev);
 int genphy_c45_read_mdix(struct phy_device *phydev);
 int genphy_c45_pma_read_abilities(struct phy_device *phydev);
-- 
2.20.1