[U-Boot] [PATCH v3 9/9] dfu: Support larger than memory transfers.

[Tom Rini]

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On 02/18/2013 05:01 AM, Lukasz Majewski wrote:
> Hi Tom,
> 
>> On Fri, Nov 30, 2012 at 08:01:12PM +0200, Pantelis Antoniou
>> wrote:
>> 
>>> We didn't support upload/download larger than available
>>> memory. This is pretty bad when you have to update your root
>>> filesystem for example.
>>> 
>>> This patch removes the limitation (and the crashes when you 
>>> transfered any file larger than 4MB). On top of that reduces
>>> the huge dfu buffer from 4MB to just 64K, which was over the
>>> top.
>>> 
>>> The sequence number is a 16 bit counter; make sure we handle
>>> rollover correctly. This fixes the wrong transfers for large (>
>>> 256MB) images.
>>> 
>>> Also utilize a variable to handle initialization, so that we 
>>> don't rely on just the counter sent by the host.
>>> 
>>> Signed-off-by: Pantelis Antoniou
>>> <panto at antoniou-consulting.com>
>> 
>> To be clear, patches 1-8 are good and we should take, but this
>> one means we can't use FAT/EXT* partitions without more work.  I
>> would suggest that we set this part aside for a moment and
>> perhaps limit transfers that are larget than RAM to RAW only
>> where we can write in chunks today.
>> 
> 
> As fair as I remember, some additional work needs to be done with 
> composite.c file (to remove nasty #ifdefs). There was a problem
> with newer version of dfu-utils (new handling of descriptors).

I thought it ended up being resolved.  I'll have to re-read the thread
again I guess.

- -- 
Tom
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