Am Dienstag, 22. Januar 2008 00:48:30 schrieben Sie: > 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 got the patch, and tested it. It seems to work like ron said! More in the SST thread.
> > 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. Oh, seems that you're right, i trusted in svn diff/revert, and svn diff didn't mention any differenceses between my version and the actual repository, but it's like you said, that this file isn't existing in the official tree. > > Regards, > Carl-Daniel regards, Harald -- coreboot mailing list coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot