I think I found how to enable BIOS chip programming. I make dump PCI config space registers device: 00:07.0 Intel Corporation 82371AB/EB/MB PIIX4 ISA [8086:7110] while vendor BIOS and while coreboot bios and compare them. I tried to change the DWORD at offset b0 and flashrom no longer displays an error GPO26 :-)
This is log after boot debian on coreboot: ======================================================================================== root@debian:~# flashrom -p internal flashrom v0.9.7-r1763 on Linux 2.6.32-5-486 (i686) flashrom is free software, get the source code at http://www.flashrom.org
Calibrating delay loop... OK. coreboot table found at 0x9fe1c00. Found chipset "Intel PIIX4/4E/4M". Enabling flash write... OK. Enabling full flash access for board "abit BF6"... ERROR: PIIX4 GPO26 not programmed for output. FAILED! Aborting to be safe. Error: Programmer initialization failed. ======================================================================================== No try set PCI register at offset b0:
setpci -s 00:07.0 b0.l=e0000105
and now flashrom working :-): ======================================================================================== root@debian:~# flashrom -p internal flashrom v0.9.7-r1763 on Linux 2.6.32-5-486 (i686) flashrom is free software, get the source code at http://www.flashrom.org
Calibrating delay loop... OK. coreboot table found at 0x9fe1c00. Found chipset "Intel PIIX4/4E/4M". Enabling flash write... OK. Enabling full flash access for board "abit BF6"... OK. Found Winbond flash chip "W49F002U/N" (256 kB, Parallel) at physical address 0xfffc0000. No operations were specified.
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Gelip