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Diffstat (limited to 'doc/README.INCA-IP')
| -rw-r--r-- | doc/README.INCA-IP | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/doc/README.INCA-IP b/doc/README.INCA-IP index 517eec0..7421b6e 100644 --- a/doc/README.INCA-IP +++ b/doc/README.INCA-IP @@ -41,4 +41,18 @@ to install a U-Boot image into flash. go 0xb0000000 + +Ethernet autonegotiation needs some time to complete. Instead of +delaying the boot process in all cases, we just start the +autonegotiation process when U-Boot comes up and that is all. Most +likely, it will complete by the time the network transfer is +attempted for the first time. In the worst case, if a transfer is +attempted before the autonegotiation is complete, just a single +packet would be lost resulting in a single timeout error, and then +the transfer would proceed normally. So the time that we would have +lost unconditionally waiting for the autonegotiation to complete, we +have to wait only if the file transfer is started immediately after +reset. We've verified that this works for all the clock +configurations. + (C) 2003 Wolfgang Denk |