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greth: do not advertise 1000M capability if MAC does not support it.

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This commit is contained in:
Jiri Gaisler
2013-06-16 15:40:03 +02:00
committed by Joel Sherrill
parent 1bdc6d1d5c
commit 45fecbb6db
1 changed files with 11 additions and 0 deletions
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11
c/src/libchip/network/greth.c
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@@ -306,6 +306,17 @@ greth_initialize_hardware (struct greth_softc *sc)
write_mii(phyaddr, 0, 0x8000 | phyctrl);
while ((read_mii(phyaddr, 0)) & 0x8000) {}
phystatus = read_mii(phyaddr, 1);
/* Disable Gbit auto-neg advertisement if MAC does not support it */
if ((!sc->gbit_mac) && (phystatus & 0x100)) write_mii(phyaddr, 9, 0);
/* Restart auto-negotiation if available */
if (phystatus & 0x08) {
write_mii(phyaddr, 0, phyctrl | 0x1200);
phyctrl = read_mii(phyaddr, 0);
}
/* Check if PHY is autoneg capable and then determine operating mode,
otherwise force it to 10 Mbit halfduplex */