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net: bcmgenet: Software reset EPHY after power on

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The EPHY on GENET v1->v3 is extremely finicky, and will show occasional
failures based on the timing and reset sequence, ranging from duplicate
packets, to extremely high latencies.

Perform an additional software reset, and re-configuration to make sure it is
in a consistent and working state.

Fixes: 6ac3ce8295 ("net: bcmgenet: Remove excessive PHY reset")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2015-10-29 18:11:35 -07:00 committed by David S. Miller
parent b43c142f22
commit 5dbebbb44a
3 changed files with 22 additions and 1 deletions
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4
drivers/net/ethernet/broadcom/genet/bcmgenet.c
View File

@ -907,8 +907,10 @@ static void bcmgenet_power_up(struct bcmgenet_priv *priv,
} }
bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT); bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
if (mode == GENET_POWER_PASSIVE) if (mode == GENET_POWER_PASSIVE) {
bcmgenet_phy_power_set(priv->dev, true); bcmgenet_phy_power_set(priv->dev, true);
bcmgenet_mii_reset(priv->dev);
}
} }
/* ioctl handle special commands that are not present in ethtool. */ /* ioctl handle special commands that are not present in ethtool. */

1
drivers/net/ethernet/broadcom/genet/bcmgenet.h
View File

@ -674,6 +674,7 @@ int bcmgenet_mii_init(struct net_device *dev);
int bcmgenet_mii_config(struct net_device *dev); int bcmgenet_mii_config(struct net_device *dev);
int bcmgenet_mii_probe(struct net_device *dev); int bcmgenet_mii_probe(struct net_device *dev);
void bcmgenet_mii_exit(struct net_device *dev); void bcmgenet_mii_exit(struct net_device *dev);
void bcmgenet_mii_reset(struct net_device *dev);
void bcmgenet_phy_power_set(struct net_device *dev, bool enable); void bcmgenet_phy_power_set(struct net_device *dev, bool enable);
void bcmgenet_mii_setup(struct net_device *dev); void bcmgenet_mii_setup(struct net_device *dev);

18
drivers/net/ethernet/broadcom/genet/bcmmii.c
View File

@ -163,6 +163,7 @@ void bcmgenet_mii_setup(struct net_device *dev)
phy_print_status(phydev); phy_print_status(phydev);
} }
static int bcmgenet_fixed_phy_link_update(struct net_device *dev, static int bcmgenet_fixed_phy_link_update(struct net_device *dev,
struct fixed_phy_status *status) struct fixed_phy_status *status)
{ {
@ -172,6 +173,22 @@ static int bcmgenet_fixed_phy_link_update(struct net_device *dev,
return 0; return 0;
} }
/* Perform a voluntary PHY software reset, since the EPHY is very finicky about
* not doing it and will start corrupting packets
*/
void bcmgenet_mii_reset(struct net_device *dev)
{
struct bcmgenet_priv *priv = netdev_priv(dev);
if (GENET_IS_V4(priv))
return;
if (priv->phydev) {
phy_init_hw(priv->phydev);
phy_start_aneg(priv->phydev);
}
}
void bcmgenet_phy_power_set(struct net_device *dev, bool enable) void bcmgenet_phy_power_set(struct net_device *dev, bool enable)
{ {
struct bcmgenet_priv *priv = netdev_priv(dev); struct bcmgenet_priv *priv = netdev_priv(dev);
@ -214,6 +231,7 @@ static void bcmgenet_internal_phy_setup(struct net_device *dev)
reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT); reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
reg |= EXT_PWR_DN_EN_LD; reg |= EXT_PWR_DN_EN_LD;
bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT); bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
bcmgenet_mii_reset(dev);
} }
static void bcmgenet_moca_phy_setup(struct bcmgenet_priv *priv) static void bcmgenet_moca_phy_setup(struct bcmgenet_priv *priv)