Am Thursday 13 May 2010 09:38:43 schrieb Jan Kiszka: > > But i noticed another minor bug. The cfi02 doesn't handle 'read flash id' > > on 16bit accesses correctly. It always returns 8 bit. I used something > > like > > > > if (width == 2) > > ret = pfl->ident[0] << 8 | pfl->ident[1]; /* rsp. ident[1]/ident[2] > > */ > > > > within the 0x90 reading as a quick workaround. > > Are you sure that this is valid? The whole cfi_table is also only > provided byte-wise, same in cfi01.
At least the JEDEC ID read returns 16 bit values with x16 devices. Have a look at: http://www.spansion.com/Support/Datasheets/s29gl128_256n_sp_a2_e.pdf Table II on page 51 micromonitor (the program i tested with) and uboot uses 16bit reads to read the flash id. Have a look at http://git.denx.de/cgi-bin/gitweb.cgi?p=u-boot.git;a=blob;f=drivers/mtd/cfi_flash.c;h=3267c5de36d1b12a190f93f9a3048ded598f84aa;hb=HEAD#l1535 -- wkr michael
