[U-Boot] Issue with USB mass storage (thumb drives)

[Marek Vasut]

On 04/14/2016 03:20 PM, Diego wrote:
> On 18.02.2016, Schrempf Frieder wrote:
>> At the moment I have two sticks with the same chip around for which
>> setting USB_MAX_XFER_BLK from 65535 to 32767 fixed the file transfer.
>> Also one of our customers tested a few non-working sticks with this
>> change and reported, that it fixed it for him.
> 
> Hi all,
> 
> sorry for reopening this thread, but I'd like to provide some additional 
> infos.
> 
> I was experiencing the same problem with several USB thumb drives, especially 
> with some Kingston DataTraveler.
> 
> Changing USB_MAX_XFER_BLK from 65535 to 32767 definitely fixed the "EHCI timed 
> out on TD" but also fixed a more subtle problem.

So the DTSE9 is problematic even on EHCI ? Sigh ... I'll have to look
into that one stick deeper, that's real bad.

> Additionally, on a Kingston DataTraveler labelled "DTSE9 G2 USB 3.0":
> ID 0951:1666 Kingston Technology DataTraveler G4
> I was experiencing apparently successful "load" transfers, but the data loaded 
> was actually corrupted when loaded in memory, as a subsequent gzwrite reported 
> broken CRC.
> 
> U-Boot > usb dev 0
> 
> USB device 0:
>     Device 0: Vendor: Kingston Rev: PMAP Prod: DataTraveler 3.0
>             Type: Removable Hard Disk
>             Capacity: 15004.3 MB = 14.6 GB (30728832 x 512)
> ... is now current device
> U-Boot > load usb 0:1 0x10008000 my-image.sdcard.gz
> reading my-image.sdcard.gz
> 112364153 bytes read in 3306 ms (32.4 MiB/s)
> U-Boot > gzwrite mmc 1 0x10008000 $filesize
> Error: inflate() returned -3
> 
>         uncompressed 4194304 of 2218786816
>         crcs == 0xa85fe71c/0xd0244792
> 
> 
> The decrease of USB_MAX_XFER_BLK from 65535 to 32767 fixed also that "corrupted 
> load" problem, so from what I experienced 32767 is a much more practical and 
> "real life" reliable value.
> 
> If, as Fabio Estevam suggested, changing USB_MAX_XFER_BLK to 32767 is being 
> considered, I definitely vote for it.
> 
> Bests,
> Diego
> 
> 
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-- 
Best regards,
Marek Vasut