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According to the Linux sungem driver, in case of Apple (K2) GMACs

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GEM_MIF_CONFIG_MDI0 cannot be trusted when the firmware has powered
down the chip so the internal transceiver has to be hardcoded. This
is also in line with the AppleGMACEthernet driver, which just doesn't
distinguish between internal/external transceiver and MDIO/MDI1
respectively in the first place. Tested by: Andreas Tobler

MFC after:	1 week
This commit is contained in:
Marius Strobl 2010-02-22 21:01:08 +00:00
parent 57079b1773
commit 9e48f1e7a5
1 changed files with 4 additions and 1 deletions
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5
sys/dev/gem/if_gem.c
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@ -297,8 +297,11 @@ gem_attach(struct gem_softc *sc)
/*
* Fall back on an internal PHY if no external PHY was found.
* Note that with Apple (K2) GMACs GEM_MIF_CONFIG_MDI0 can't be
* trusted when the firmware has powered down the chip.
*/
if (error != 0 && (v & GEM_MIF_CONFIG_MDI0) != 0) {
if (error != 0 &&
((v & GEM_MIF_CONFIG_MDI0) != 0 || GEM_IS_APPLE(sc))) {
v &= ~GEM_MIF_CONFIG_PHY_SEL;
GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, v);
switch (sc->sc_variant) {