From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Puschmann Date: Wed, 12 Apr 2006 16:44:13 +0200 Subject: [U-Boot-Users] Re: tftp timeout In-Reply-To: <443CEA56.8010701@smiths-aerospace.com> References: <443CEA56.8010701@smiths-aerospace.com> Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Jerry Van Baren wrote: > Andre Puschmann wrote: > >> hallo, >> i know this newsgroup already talked about this subject and of course i >> read this stuff but there are still some questions .. >> >> i am currently trying to download a kernel image via tftp from a >> tftp-server on my hostpc which is connected through a ethernet-switch. >> but i always get timeouts .. look at this: >> >> >> Load address: 0x20800000 >> Loading: *\0x08#######T ##################################T >> ###################T ####T ##T # >> \0x09 ###T #T #########T ########T #############T ##T #############T >> ########T #############T >> \0x09 #####T ###T ######T #######T #######T #############T ##T >> ##############T ########### >> \0x09 ########### >> done >> >> >> i mean .. the transfer is ok .. but it takes ages :-) >> >> >> it looks like this if i connect my board directly to my hostpc. >> >> >> Load address: 0x20800000 >> Loading: *\0x08T >> ################################################################# >> \0x09 ################################################################# >> \0x09 ################################################################# >> \0x09 ########### >> done >> >> >> >> does anybody got the same issues? >> i mean there is no huge traffic on the net and my local tftp client >> loads the 1MB kernel-image in seconds. >> i am using u-boot-1.1.1 and i also tried u-boot-1.1.4! >> >> regards >> andre > > > My guess is that you have a full duplex/half duplex problem. Verify > that your board/u-boot is setting your ethernet to the proper duplex > (full/half). I'm guessing your board is half duplex but your switch is > full (typical of a switch ;-). > > The switch sends traffic to your board while your board is > transmitting... that is a collision (late collision at that) to your > board but is OK to the switch. This doesn't happen nearly as much with > your PC since you have a dedicated link without much asynchronous traffic. > > This is a FAQ type problem where the software (u-boot/linux) needs to > poll the PHY chip for duplex and then (re)configure the MAC chip > (separate or built into the CPU) to match. If the poll isn't happening > or has a bug, you have a problem. > > gvb > thanks for your tip .. sorry i am not that introduced in how autonegotiation works but i guess the function dm9161_AutoNegotiate() in dm9161.c does the related stuff. i mean the switch i am using is a no-name one and with an other netg**r-switch it works nice, just tested it ... so it seems to be a bug in that fuctions, right?? regards andre