From e0ac62d798ce60ec5d43125d4786e58b0d881836 Mon Sep 17 00:00:00 2001 From: wdenk Date: Sun, 17 Aug 2003 18:55:18 +0000 Subject: * Make Ethernet autonegotiation on INCA-IP work for all clock rates; allow selection of clock frequency as "make" target * Implement memory autosizing code for IceCube boards * Configure network port on INCA-IP for autonegotiation * Fix overflow problem in network timeout code * Patch by Richard Woodruff, 8 Aug 2003: Allow crc32 to be used at address 0x000 (crc32_no_comp, too). --- doc/README.INCA-IP | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'doc/README.INCA-IP') diff --git a/doc/README.INCA-IP b/doc/README.INCA-IP index 517eec040..7421b6ed2 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 -- cgit v1.2.3