[U-Boot] [PATCH v5 2/9] dfu: Support larger than memory transfers.

[Tom Rini <trini@ti.com>]

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On 03/11/2013 06:03 AM, Lukasz Majewski wrote:
> Hi Tom,
> 
> 
>> 
>>> From: Pantelis Antoniou <panto@antoniou-consulting.com>
>>> 
>>> Previously 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 that limitation (and the crashes when you 
>>> transfered any file larger than 4MB) by making raw image writes
>>> be done in chunks and making file maximum size be
>>> configurable.
>>> 
>>> 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@antoniou-consulting.com> Signed-off-by: Tom Rini
>>> <trini@ti.com>
>> 
>> Acked-by: Lukasz Majewski <l.majewski@samsung.com>
>> 
>> Test-hw: Exynos 4210 (Trats)
>> 
>> Tested-by: Lukasz Majewski <l.majewski@samsung.com>
> 
> Sorry but, I've found a regression for reading image from a file 
> system. It happens with EXT4 mmc read (like uImage).

Can you please confirm read works as-is today?  It's possible that
when I tried I was using (what I've now called) a marginal SD card
I've finally written too much to the front sectors on, but it wasn't
working for me at all.  I'll try and reproduce as well.  That said,
there is a problem:

> mmc_file_op: ext4load mmc 0:2 /uImage 0x0 0 0x7f95dc98 ** File not
> found 0x0 ** dfu: Read error!
> 
> ext4load params: ext4load - load binary file from a Ext4
> filesystem
> 
> Usage: ext4load <interface> <dev[:part]> [addr] [filename] [bytes] 
> - load binary file 'filename' from 'dev' on 'interface' to address
> 'addr' from ext4 filesystem. All numeric parameters are assumed to
> be hex.
> 
> Some parameters are wrong (buffer - 0x0) and some are switched
> (address and filename).

I just noticed last week that ext4load has the syntax backwards from
fatload for address/filename :(  And in this case it's passing in too
many params, so I will fix that.

>>> +	       __func__, dfu->name, buf, size, blk_seq_num, 
>>> dfu->i_buf); + +	if (!dfu->inited) { +		ret =
>>> dfu->read_medium(dfu, 0, NULL, &dfu->r_left);
> ^^^^^^^^^^^^ this call causes read error. I suppose, that it is an
> initial "read". Does it read the whole file at once?

I'll double check what's going on over here.

- -- 
Tom
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