Per the "TS-7800 Development Status Notice" of June-2008 there is a
note regarding DMA improvement and stating write performance. Perhaps
your source is older than this.
David.
--- In "janne.kario" <> wrote:
>
> --- In "David Farrell" <davidjf2001@> wrote:
>
> >
> > The sdcard.c source is in the kernel souce package and does indicate
> > DMA use. Only a portion (sdcore) does not have source and this looks
> > to be upper level only.
>
> Thanks. I checked out the 2.4 sdcard.c and compared it with the 2.6
> tssdcard.c. What bugs me is that DMA transfer source SAR_BASE0 address
> and destination DAR_BASE0 are always the same and driver does not make
> any effort to check sd_state to see whether this is a read or write
> operation. It is as if the DMA was never meant to be used for write
> operations.
>
> j
>
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