[U-Boot] [PATCH] mmc: seperate block number into small parts for multi-write cmd

[Wolfgang Denk]

Dear Reinhard Meyer, dear Lei Wen,

In message <4CB2EA80.2090804 at emk-elektronik.de> you wrote:
>
> > Ok, I am also fine with not include the 512KiB restriction.
> > So we comes to a conclusion that we still use v1 patch, but cut the
> > 512KiB limitation?
> 
> Considering the comments that were given to that one, yes.

I would like to point out that, from the previous discussion, I
actually think that a 512 KiB limit would be wrong. If the limitation
is really in the alignment, i. e. when crossing a 512 KiB boundary,
then the allowable transfer size depends on the start address, and
512 KiB is actually only the maximum possible value.

> > As mmc host limitation, the max number of block in one go
> > should be limited to 65535, and the max buffer size should
> > not excceed 512k bytes.
> 
> Better reads somehow like this:
> Since some hardware has a 16 bit block counter, split the multiple block
> write into a maximum of (2**16 - 1) blocks to be written at one go.

Agreed.

Best regards,

Wolfgang Denk

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