[U-Boot] Ethernet problem on A20 Lime2

[Tom Rini <trini@konsulko.com>]

On Tue, Apr 21, 2015 at 04:11:34PM +0200, Hans de Goede wrote:
> 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.

1 2 and 3 all failed :(

-- 
Tom
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