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net: dsa: mv88e6xxx: support 2500base-x in SGMII IRQ handler

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The mv88e6390_serdes_irq_link_sgmii IRQ handler reads the SERDES PHY
status register to determine speed, among other things. If cmode of the
port is set to 2500base-x, though, the PHY still reports 1000 Mbps (the
PHY register itself does not differentiate between 1000 Mbps and 2500
Mbps - it thinks it is running at 1000 Mbps, although clock is 2.5x
faster).
Look at the cmode and set SPEED_2500 if cmode is set to 2500base-x.
Also tell mv88e6xxx_port_setup_mac the PHY interface mode corresponding
to current cmode in terms of phy_interface_t.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marek Behún 2019-08-26 23:31:50 +02:00 committed by David S. Miller
parent e93b4f0386
commit 4e6da7969f
1 changed files with 21 additions and 2 deletions
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23
drivers/net/dsa/mv88e6xxx/serdes.c
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@ -505,9 +505,11 @@ int mv88e6390x_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
static void mv88e6390_serdes_irq_link_sgmii(struct mv88e6xxx_chip *chip,
int port, int lane)
{
u8 cmode = chip->ports[port].cmode;
struct dsa_switch *ds = chip->ds;
int duplex = DUPLEX_UNKNOWN;
int speed = SPEED_UNKNOWN;
phy_interface_t mode;
int link, err;
u16 status;
@ -527,7 +529,10 @@ static void mv88e6390_serdes_irq_link_sgmii(struct mv88e6xxx_chip *chip,
switch (status & MV88E6390_SGMII_PHY_STATUS_SPEED_MASK) {
case MV88E6390_SGMII_PHY_STATUS_SPEED_1000:
speed = SPEED_1000;
if (cmode == MV88E6XXX_PORT_STS_CMODE_2500BASEX)
speed = SPEED_2500;
else
speed = SPEED_1000;
break;
case MV88E6390_SGMII_PHY_STATUS_SPEED_100:
speed = SPEED_100;
@ -541,8 +546,22 @@ static void mv88e6390_serdes_irq_link_sgmii(struct mv88e6xxx_chip *chip,
}
}
switch (cmode) {
case MV88E6XXX_PORT_STS_CMODE_SGMII:
mode = PHY_INTERFACE_MODE_SGMII;
break;
case MV88E6XXX_PORT_STS_CMODE_1000BASE_X:
mode = PHY_INTERFACE_MODE_1000BASEX;
break;
case MV88E6XXX_PORT_STS_CMODE_2500BASEX:
mode = PHY_INTERFACE_MODE_2500BASEX;
break;
default:
mode = PHY_INTERFACE_MODE_NA;
}
err = mv88e6xxx_port_setup_mac(chip, port, link, speed, duplex,
PAUSE_OFF, PHY_INTERFACE_MODE_NA);
PAUSE_OFF, mode);
if (err)
dev_err(chip->dev, "can't propagate PHY settings to MAC: %d\n",
err);