On Tue, 12 May 2009, David Brownell wrote: > On Tuesday 12 May 2009, Nicolas Pitre wrote: > > The Kirkwood bootrom expects 4-bit ECC from NAND. This adds > > 4-bit ECC computation to the NAND support and uses it with SheevaPlug. > > Hmm, from the outside this sounds like the 4-bit ECC in some > TI DaVinci family chips: 10 bytes ECC per 512 bytes data, > delivered as eight 10-bit values.
Isn't ECC on the Davinci computed in hardware by the NAND controller? But otherwise it is a Reed-Solomon implementation using a x^10 + x^3 + 1 polinomial. Anyone with the same ECC characteristics may reuse this code quite trivially. Stay tuned for Linux support soon as well. > Maybe some of this should share code ... probably not the > "compute backwards" part though! No comment ... Nicolas
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