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bcm63xx_enet: check 1000BASE-T advertisement configuration 

If a gigabit ethernet PHY is connected to a fast ethernet MAC,
then it can detect 1000 support from the partner but not use it.

This results in a forced speed of 1000 and RX/TX failure.

Check for 1000BASE-T support and then check the advertisement
configuration before setting the MAC speed to 1000mbit.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Simon Arlott 2015-10-15 21:00:22 +01:00 committed by David S. Miller
parent 1099f86044
commit aebd99477f
1 changed files with 18 additions and 13 deletions
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23
drivers/net/ethernet/broadcom/bcm63xx_enet.c
View File

@ -2049,7 +2049,7 @@ static void swphy_poll_timer(unsigned long data)
for (i = 0; i < priv->num_ports; i++) {
struct bcm63xx_enetsw_port *port;
int val, j, up, advertise, lpa, lpa2, speed, duplex, media;
int val, j, up, advertise, lpa, speed, duplex, media;
int external_phy = bcm_enet_port_is_rgmii(i);
u8 override;
@ -2092,22 +2092,27 @@ static void swphy_poll_timer(unsigned long data)
lpa = bcmenet_sw_mdio_read(priv, external_phy, port->phy_id,
MII_LPA);
lpa2 = bcmenet_sw_mdio_read(priv, external_phy, port->phy_id,
MII_STAT1000);
/* figure out media and duplex from advertise and LPA values */
media = mii_nway_result(lpa & advertise);
duplex = (media & ADVERTISE_FULL) ? 1 : 0;
if (lpa2 & LPA_1000FULL)
duplex = 1;
if (lpa2 & (LPA_1000FULL | LPA_1000HALF))
speed = 1000;
else {
if (media & (ADVERTISE_100FULL | ADVERTISE_100HALF))
speed = 100;
else
speed = 10;
if (val & BMSR_ESTATEN) {
advertise = bcmenet_sw_mdio_read(priv, external_phy,
port->phy_id, MII_CTRL1000);
lpa = bcmenet_sw_mdio_read(priv, external_phy,
port->phy_id, MII_STAT1000);
if (advertise & (ADVERTISE_1000FULL | ADVERTISE_1000HALF)
&& lpa & (LPA_1000FULL | LPA_1000HALF)) {
speed = 1000;
duplex = (lpa & LPA_1000FULL);
}
}
dev_info(&priv->pdev->dev,