RZ/G2L supports half duplex mode.
Add a half_duplex hw feature bit to struct ravb_hw_info for
supporting half duplex mode for RZ/G2L.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Reviewed-by: Sergey Shtylyov <s.shtylyov@xxxxxx>
---
RFC->v1:
* Added Sergei's Rb tag.
---
drivers/net/ethernet/renesas/ravb.h | 3 ++
drivers/net/ethernet/renesas/ravb_main.c | 36 ++++++++++++++++++------
2 files changed, 31 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index f0d9b7bc8c20..d83d3b4f3f5f 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1008,6 +1008,7 @@ struct ravb_hw_info {
unsigned ccc_gac:1; /* AVB-DMAC has gPTP support active in config mode */
unsigned nc_queue:1; /* AVB-DMAC has NC queue */
unsigned magic_pkt:1; /* E-MAC supports magic packet detection */
+ unsigned half_duplex:1; /* E-MAC supports half duplex mode */
};
struct ravb_private {
@@ -1062,6 +1063,8 @@ struct ravb_private {
unsigned rgmii_override:1; /* Deprecated rgmii-*id behavior */
unsigned int num_tx_desc; /* TX descriptors per packet */
+ int duplex;
+
const struct ravb_hw_info *info;
struct reset_control *rstc;
};
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 6fb11d4cfc57..3e694738e683 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1091,6 +1091,13 @@ static int ravb_poll(struct napi_struct *napi, int budget)
return budget - quota;
}
+static void ravb_set_duplex_gbeth(struct net_device *ndev)
+{
+ struct ravb_private *priv = netdev_priv(ndev);
+
+ ravb_modify(ndev, ECMR, ECMR_DM, priv->duplex > 0 ? ECMR_DM : 0);
+}
+
/* PHY state control function */
static void ravb_adjust_link(struct net_device *ndev)
{
@@ -1107,6 +1114,12 @@ static void ravb_adjust_link(struct net_device *ndev)
ravb_rcv_snd_disable(ndev);
if (phydev->link) {
+ if (info->half_duplex && phydev->duplex != priv->duplex) {
+ new_state = true;
+ priv->duplex = phydev->duplex;
+ ravb_set_duplex_gbeth(ndev);
+ }
+
if (phydev->speed != priv->speed) {
new_state = true;
priv->speed = phydev->speed;
@@ -1121,6 +1134,8 @@ static void ravb_adjust_link(struct net_device *ndev)
new_state = true;
priv->link = 0;
priv->speed = 0;
+ if (info->half_duplex)
+ priv->duplex = -1;
}
/* Enable TX and RX right over here, if E-MAC change is ignored */
@@ -1143,6 +1158,7 @@ static int ravb_phy_init(struct net_device *ndev)
{
struct device_node *np = ndev->dev.parent->of_node;
struct ravb_private *priv = netdev_priv(ndev);
+ const struct ravb_hw_info *info = priv->info;
struct phy_device *phydev;
struct device_node *pn;
phy_interface_t iface;
@@ -1150,6 +1166,7 @@ static int ravb_phy_init(struct net_device *ndev)
priv->link = 0;
priv->speed = 0;
+ priv->duplex = -1;
/* Try connecting to PHY */
pn = of_parse_phandle(np, "phy-handle", 0);
@@ -1188,15 +1205,17 @@ static int ravb_phy_init(struct net_device *ndev)
netdev_info(ndev, "limited PHY to 100Mbit/s\n");
}
- /* 10BASE, Pause and Asym Pause is not supported */
- phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
- phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
- phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Pause_BIT);
- phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
+ if (!info->half_duplex) {
+ /* 10BASE, Pause and Asym Pause is not supported */
+ phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
+ phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
+ phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Pause_BIT);
+ phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
- /* Half Duplex is not supported */
- phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
- phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
+ /* Half Duplex is not supported */
+ phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+ phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
+ }
phy_attached_info(phydev);
@@ -2175,6 +2194,7 @@ static const struct ravb_hw_info gbeth_hw_info = {
.tsrq = TCCR_TSRQ0,
.aligned_tx = 1,
.tx_counters = 1,
+ .half_duplex = 1,
};
static const struct of_device_id ravb_match_table[] = {
--
2.17.1
