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authorOleksij Rempel <o.rempel@pengutronix.de>2020-05-05 09:35:05 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-07 03:45:45 +0300
commitbdbdac7649fac05f88c9f7ab18121a17fb591687 (patch)
tree2f5705f9e39fcfebcdb0f71165e465173b7413dc /drivers/net/phy/phy.c
parent3d59a5837c826f5df994ef49acc22902baae6057 (diff)
downloadlinux-bdbdac7649fac05f88c9f7ab18121a17fb591687.tar.xz
ethtool: provide UAPI for PHY master/slave configuration.
This UAPI is needed for BroadR-Reach 100BASE-T1 devices. Due to lack of auto-negotiation support, we needed to be able to configure the MASTER-SLAVE role of the port manually or from an application in user space. The same UAPI can be used for 1000BASE-T or MultiGBASE-T devices to force MASTER or SLAVE role. See IEEE 802.3-2018: 22.2.4.3.7 MASTER-SLAVE control register (Register 9) 22.2.4.3.8 MASTER-SLAVE status register (Register 10) 40.5.2 MASTER-SLAVE configuration resolution 45.2.1.185.1 MASTER-SLAVE config value (1.2100.14) 45.2.7.10 MultiGBASE-T AN control 1 register (Register 7.32) The MASTER-SLAVE role affects the clock configuration: ------------------------------------------------------------------------------- When the PHY is configured as MASTER, the PMA Transmit function shall source TX_TCLK from a local clock source. When configured as SLAVE, the PMA Transmit function shall source TX_TCLK from the clock recovered from data stream provided by MASTER. iMX6Q KSZ9031 XXX ------\ /-----------\ /------------\ | | | | | MAC |<----RGMII----->| PHY Slave |<------>| PHY Master | |<--- 125 MHz ---+-<------/ | | \ | ------/ \-----------/ \------------/ ^ \-TX_TCLK ------------------------------------------------------------------------------- Since some clock or link related issues are only reproducible in a specific MASTER-SLAVE-role, MAC and PHY configuration, it is beneficial to provide generic (not 100BASE-T1 specific) interface to the user space for configuration flexibility and trouble shooting. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/phy.c')
-rw-r--r--drivers/net/phy/phy.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 72c69a9c8a98..8c22d02b4218 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -295,7 +295,7 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev,
phydev->advertising, autoneg == AUTONEG_ENABLE);
phydev->duplex = duplex;
-
+ phydev->master_slave_set = cmd->base.master_slave_cfg;
phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
/* Restart the PHY */
@@ -314,6 +314,8 @@ void phy_ethtool_ksettings_get(struct phy_device *phydev,
cmd->base.speed = phydev->speed;
cmd->base.duplex = phydev->duplex;
+ cmd->base.master_slave_cfg = phydev->master_slave_get;
+ cmd->base.master_slave_state = phydev->master_slave_state;
if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
cmd->base.port = PORT_BNC;
else