From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans de Goede Date: Tue, 21 Apr 2015 16:11:34 +0200 Subject: [U-Boot] Ethernet problem on A20 Lime2 In-Reply-To: <20150421140338.GG16702@bill-the-cat> References: <20150421140338.GG16702@bill-the-cat> Message-ID: <55365A96.8040701@redhat.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Tom, On 21-04-15 16:03, Tom Rini wrote: > Hey, > > I've run into a problem with ethernet on the A20 Lime2: > sunxi# setenv autoload no > sunxi# dhcp > Speed: 1000, full duplex > BOOTP broadcast 1 > DHCP client bound to address 192.168.0.185 (13 ms) > sunxi# tftp test/u-boot-sunxi-with-spl.bin > Speed: 1000, full duplex > Using dwmac.1c50000 device > TFTP from server 192.168.0.3; our IP address is 192.168.0.185 > Filename 'test/u-boot-sunxi-with-spl.bin'. > Load address: 0x42000000 > Loading: ################################################################# > ######### > 23.4 KiB/s > done > Bytes transferred = 377028 (5c0c4 hex) > sunxi# crc32 $fileaddr $filesize > CRC32 for 42000000 ... 4205c0c3 ==> afa0edfb > $ rhash -C /tftpboot/test/u-boot-sunxi-with-spl.bin > ; Generated by RHash v1.2.8 on 2015-04-21 at 10:01.53 > ; Written by Aleksey (Akademgorodok) - http://rhash.sourceforge.net/ > ; > ; 377028 09:52.08 2015-04-21 /tftpboot/test/u-boot-sunxi-with-spl.bin > /tftpboot/test/u-boot-sunxi-with-spl.bin A16F5564 > > So a non-crc32 match. If I load that same file off of SD card: > sunxi# mmc read 43000000 10 400 > > MMC read: dev # 0, block # 16, count 1024 ... 1024 blocks read: OK > sunxi# cmp 42000000 43000000 $filesize > word at 0x42001544 (0x605a0200) != word at 0x43001544 (0x605a0201) > Total of 1361 word(s) were the same > > I haven't had a chance to bisect this but it might have been around for > a little while. Chances are this has never worked 100% reliable, on most boards some tweaking of the GMAC clk delays is necessary. Try setting CONFIG_GMAC_TX_DELAY=1 In the defconfig for your board, that helps with similar issues on the Cubietruck (which also has gbit ethernet) Valid values are 0 - 3. Regards, Hans