[U-Boot] [PATCH v9] usb: align buffers at cacheline

[puneets <puneets@nvidia.com>]

Hi Marek,
I tested on tegra2, Seaboard and didn't see these messages though see 
lots of messages
"ERROR: v7_dcache_inval_range - stop address is not aligned - 
0x3fb7c608" which are expected.
PFA the logs if you can make out anything useful.

Try to increase the delay in handshake();

Thanks,
Puneet

On Wednesday 04 April 2012 01:31 PM, Marek Vasut wrote:
> Dear Puneet Saxena,
>
>> This avoids cache-alignment warnings shown in console
>> when a usb command is entered.
>>
>> Whenever X bytes of unaligned buffer is invalidated, arm core
>> invalidates X + Y bytes as per the cache line size and throws
>> these warnings.
>>
>> Signed-off-by: Puneet Saxena<puneets@nvidia.com>
>> ---
> I think we're almost there, hurray! :-)
>
> Though on m28evk this still has issues:
>
> =>  usb reset
> (Re)start USB...
> USB:   Register 10011 NbrPorts 1
> USB EHCI 1.00
> scanning bus for devices... EHCI timed out on TD - token=0x80008c80
> EHCI timed out on TD - token=0x80008d80
> EHCI timed out on TD - token=0x80008c80
> EHCI timed out on TD - token=0x80008c80
> EHCI timed out on TD - token=0x80008c80
>   ERROR: NOT USB_CONFIG_DESC 1
> EHCI timed out on TD - token=0x80008d80
> 2 USB Device(s) found
>         scanning bus for storage devices... 0 Storage Device(s) found
>
> I have a single USB pendrive connected to the board.
>
> Also note, that if I disable the caches, it all works even with your patch
> applied. So I suspect there's something even more to this (maybe broken
> ehci_invalidate_dcache() ? ). Where did you test these patches?
>
> Thanks!
>
> Best regards,
> Marek Vasut


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