I think its safe to use a read opcode by default. The DediProg can't reach high clock rates, well below the limit for the normal read on most memories.
I have a DediProg available for testing. Thanks. Em 16/06/2013 11:10, "Stefan Tauner" <[email protected]> escreveu: > Hi, > > the release of flashrom 0.9.7 is imminent and I would really like to > enable the Dediprog programmer by default. Carl-Daniel informed me that > the only problem is that we do not know which opcode is actually used > for reading on the SPI bus. It could be that we initiate a fast read > (0x0b) instead of a normal read (0x03). This would work with the > majority of flash chips but would not with others where flashrom > should normally work. Since we are not sure we don't want to enable it > without further consideration/testing/warning messages. Furthermore > not all chips supporting fast read have this fact noted in their > datashets. So testing any apparently non-fast read chip does not > suffice. We would rather be able to check the opcode on the SPI bus > with a logic analyzer directly. Are there any Dediprog users who can > help us with that please? > > -- > Kind regards/Mit freundlichen Grüßen, Stefan Tauner > > -- > coreboot mailing list: [email protected] > http://www.coreboot.org/mailman/listinfo/coreboot
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