diff options
| author | MD Danish Anwar <danishanwar@ti.com> | 2023-09-13 12:10:11 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-09-15 15:54:34 +0300 |
| commit | 0a205f0fe8dd2ab80531b54f01d6483f37120c0e (patch) | |
| tree | 1897949d72b10916504d6a9872a226b9469c3881 /drivers/net/ethernet/ti/icssg/icssg_prueth.c | |
| parent | 927c568d62128f48d6646d6df801c1ae25cf139f (diff) | |
| download | linux-0a205f0fe8dd2ab80531b54f01d6483f37120c0e.tar.xz | |
net: ti: icssg-prueth: Add support for half duplex operation
This patch adds support for half duplex operation at 10M and 100M link
speeds for AM654x/AM64x devices.
- Driver configures rand_seed, a random number, in DMEM HD_RAND_SEED_OFFSET
field, which will be used by firmware for Back off time calculation.
- Driver informs FW about half duplex link operation in DMEM
PORT_LINK_SPEED_OFFSET field by setting bit 7 for 10/100M HD.
Hence, the half duplex operation depends on board design the
"ti,half-duplex-capable" property has to be enabled for ICSS-G ports if HW
is capable to perform half duplex.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/ti/icssg/icssg_prueth.c')
| -rw-r--r-- | drivers/net/ethernet/ti/icssg/icssg_prueth.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c index 92b13057d4de..6635b28bc672 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c @@ -1029,6 +1029,8 @@ static void emac_adjust_link(struct net_device *ndev) * values */ if (emac->link) { + if (emac->duplex == DUPLEX_HALF) + icssg_config_half_duplex(emac); /* Set the RGMII cfg for gig en and full duplex */ icssg_update_rgmii_cfg(prueth->miig_rt, emac); @@ -1147,9 +1149,13 @@ static int emac_phy_connect(struct prueth_emac *emac) return -ENODEV; } + if (!emac->half_duplex) { + dev_dbg(prueth->dev, "half duplex mode is not supported\n"); + phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT); + phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT); + } + /* remove unsupported modes */ - phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT); - phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Pause_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT); @@ -2113,6 +2119,10 @@ static int prueth_probe(struct platform_device *pdev) eth0_node->name); goto exit_iep; } + + if (of_find_property(eth0_node, "ti,half-duplex-capable", NULL)) + prueth->emac[PRUETH_MAC0]->half_duplex = 1; + prueth->emac[PRUETH_MAC0]->iep = prueth->iep0; } @@ -2124,6 +2134,9 @@ static int prueth_probe(struct platform_device *pdev) goto netdev_exit; } + if (of_find_property(eth1_node, "ti,half-duplex-capable", NULL)) + prueth->emac[PRUETH_MAC1]->half_duplex = 1; + prueth->emac[PRUETH_MAC1]->iep = prueth->iep0; } |