CFI chip detection

CFI chip detection

[David Vrabel]

Hi,

In cfi_cfi_probe() there is
	for (base = (1<<cfi.chipshift) * cfi.interleave; base < map->size; base
+=
	     (1<<cfi.chipshift) * cfi.interleave)
		cfi_probe_new_chip(map, base, &chip[0], &cfi);
		...
to detect aditional chips.  However is did not work on the board I have
(SBC-MediaGX).  Removing the `* cfi.interleave' caused additional chips
to be detected.  Is this a quirk particular to this board or is the
above code wrong?

The SBC-MediaGX has:
  1x 28F640 in x8 mode for the 8 Mbyte board
  2x 28F640 in x8 mode for the 16 Mbyte board

David Vrabel



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Re: CFI chip detection

[David Woodhouse]

dvrabel@arcom.co.uk said:
>  Removing the `* cfi.interleave' caused additional chips to be
> detected.  Is this a quirk particular to this board or is the above
> code wrong?

> The SBC-MediaGX has:
>   1x 28F640 in x8 mode for the 8 Mbyte board
>   2x 28F640 in x8 mode for the 16 Mbyte board 

Odd. How exactly are the chips mapped in the 16 MB board? Are they 
interleaved, or just concurrently mapped?

Can you show the output when it fails to detect the second chip?

--
dwmw2




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