On 21.01.2008 17:15, Harald Gutmann wrote: > Hello! > > As in the thread "Re: [coreboot] SST25VF016B (2MB) flash on m57sli (IT8716F)" > there was added support for writing/reading lager SPI chips than 512kB i had > a look on the current flashrom code, in svn revision 3067. > > I recogniced that the MX25L8005 calls the same function than the SST25VF016B > in the flashchips.c file. The function called there are > generic_spi_chip_erase_c7, generic_spi_chip_write and generic_spi_chip_read. > The write function is in spi.c, and checks if the total_size is bigger than > 512kB, as result of that check the it8716f_over512k_spi_chip_write should be > called to write the chip. The SST25VF016B can be programmed/verified/erased > but not the MX25L8005. >
Probably either the chip does not support BYTE-PROGRAM or we have a timing issue. I checked the datasheet and the MX25L8005 indeed has a PAGE-PROGRAM mode, but it can be abused for BYTE-PROGRAM. > Writing random data to the chip results in a failed verify. Erasing the chip > seems to work. > Here is the file which i wrote to the chip, and the file which i get as > result > when trying to read the chip. (looks quite strange in hexdump, there are many > FF lines in the read file.) > http://rapidshare.com/files/85450682/read_write_diff-r3067.tar.gz.html > This is a timing issue with ~95% probability. Simply look at the readback result. Will send a patch. > I also wondered if the mx25l4005.c file is needed any more, because the > functions in there aren't called anywhere. > Hm. Are you sure this file exists in the official tree? I can't find it. Regards, Carl-Daniel -- coreboot mailing list coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot