On 24.01.2008 13:38, Peter Stuge wrote: > I put a Spansion chip on a m57sli. This patch lets flashrom read the > chip successfully. Writing is inconsistent. > > I've done two writes so far. Writing takes several minutes and I > don't get any progress messages from flashrom. > > The first run was 4*coreboot.rom and that booted right away with VGA > and all. Yay! The read back file matched the original file. >
As expected. > Then I wrote rand.bin which is 2MB of /dev/random. This consistently > reads back as something quite different from the original. See 8MB > diff at http://stuge.se/m57sli/s25fl016a.diff (rand.bin and back.bin > are there too) > If the readback doesn't change between reads, the explanation may be simple. Look at the bit pattern in rand.xxd and back.xxd. Note that probably all bits which are set to 0 in rand.xxd are also 0 in back.xxd. This looks like the chip was not erased between writing 4*coreboot.rom and the random image. Can you verify the chip is indeed blank after erase, and then flash the random image again? > + {"S25FL016A", SPANSION_ID, SPANSION_S25FL016A, 2048, 256, > + probe_spi, generic_spi_chip_erase_c7, > over512k_spi_chip_write, over512k_spi_chip_read}, > You can use generic_spi_* instead of over512k_spi_*. The code is intelligent enough to switch behaviour based on ROM chip size. Regards, Carl-Daniel -- coreboot mailing list [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
