net: bcmgenet: Allow changing carrier from user-space

The GENET driver interfaces with internal MoCA interface as well as
external MoCA chips like the BCM6802/6803 through a fixed link
interface. It is desirable for the mocad user-space daemon to be able to
control the carrier state based upon out of band messages that it
receives from the MoCA chip.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index af924a8..ee84a26 100644 (file)
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -3647,6 +3647,22 @@ static struct net_device_stats *bcmgenet_get_stats(struct net_device *dev)
        return &dev->stats;
 }
 
+static int bcmgenet_change_carrier(struct net_device *dev, bool new_carrier)
+{
+       struct bcmgenet_priv *priv = netdev_priv(dev);
+
+       if (!dev->phydev || !phy_is_pseudo_fixed_link(dev->phydev) ||
+           priv->phy_interface != PHY_INTERFACE_MODE_MOCA)
+               return -EOPNOTSUPP;
+
+       if (new_carrier)
+               netif_carrier_on(dev);
+       else
+               netif_carrier_off(dev);
+
+       return 0;
+}
+
 static const struct net_device_ops bcmgenet_netdev_ops = {
        .ndo_open               = bcmgenet_open,
        .ndo_stop               = bcmgenet_close,
@@ -3660,6 +3676,7 @@ static const struct net_device_ops bcmgenet_netdev_ops = {
        .ndo_poll_controller    = bcmgenet_poll_controller,
 #endif
        .ndo_get_stats          = bcmgenet_get_stats,
+       .ndo_change_carrier     = bcmgenet_change_carrier,
 };
 
 /* Array of GENET hardware parameters/characteristics */