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

[Lukasz Majewski]

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). 

It is on top of my queue, but I'm currently buried with other work and
need to postpone this.

However it is still on the back of my head and I push myself to fix
this.

-- 
Best regards,

Lukasz Majewski

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