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PPC4xx (Sequoia): Fix Ethernet "remote fault" problems 

Every now and then a Sequoia board (or equivalent hardware) had
problems connecting to a Gigabit capable network interface.

There were differences in the PHY setup between Linux and U-Boot.

This patch fixes the problem. Apparently "remote fault" is being set,
which signals to some devices (on the other end of the cable) that a
fault has occurred, while other devices ignore it. I believe the RF bit
was causing the issue, but I removed T4 also, to match up with Linux.

Signed-off-by: Mike Nuss <mike@terascala.com>
This commit is contained in:
Mike Nuss 2008-03-03 15:27:05 -05:00 committed by Wolfgang Denk
parent 491fb6dea9
commit 74eb022259
1 changed files with 2 additions and 3 deletions
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5
cpu/ppc4xx/miiphy.c
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@ -143,9 +143,8 @@ int phy_setup_aneg (char *devname, unsigned char addr)
u16 adv;
miiphy_read (devname, addr, PHY_ANAR, &adv);
adv |= (PHY_ANLPAR_ACK | PHY_ANLPAR_RF | PHY_ANLPAR_T4 |
PHY_ANLPAR_TXFD | PHY_ANLPAR_TX | PHY_ANLPAR_10FD |
PHY_ANLPAR_10);
adv |= (PHY_ANLPAR_ACK | PHY_ANLPAR_TXFD | PHY_ANLPAR_TX |
PHY_ANLPAR_10FD | PHY_ANLPAR_10);
miiphy_write (devname, addr, PHY_ANAR, adv);
miiphy_read (devname, addr, PHY_1000BTCR, &adv);