[coreboot] Coreboot on Axiomtek PICO821

[Alp Eren Köse]

> If you store that spare rom in a safe place and only use it to boot
> from, you don't need an external programmer. A often used trick to
> ease removal is to glue a handle to the chip:
>
http://www.settoplinux.org/images/thumb/5/56/Push_pin2.jpg/500px-Push_pin2.jpg

Ok, if I understand it right, when I brick the first rom, I can boot using
the second one into a freedos, remove the rom while the system is running
and put the bricked rom in and flash the original BIOS, is that correct??
The pin trick is very nice btw:)

> 4) Copy the files from the iwave board (cd
src/mainboard/iwave/iWRainbowG6/ ; cp -r * ../../axiomtek/pico821/ ),
> edit at least devicetree.cb, Kconfig and mainboard.c. Then replace the
names but keep the (C) copyright headers.

I suppose I will edit devicetree.cb file according to my lspci output, but I
didn't get how to modify the lines similar to following:
chip southbridge/intel/sch
            register "pirqa_routing" = "0xa"
            register "pirqb_routing" = "0xb"
Are those something about IRQ routing? my board also have Intel SCH so I
hope they are the same..

And there is not much in mainboard.c file, I couldn't see much to change
apart from the CHIP_NAME?

> Compile and run superiotool, it's in util/superiotool/

I have run it on my board, i have an " Winbond W83627HF/F/HG/G (id=0x52,
rev=0x41)", but I don't know what iWRainbowG6 has on it? I looked at the
code, but couldn't figure what it's SuperIO chip is? Anyone know, or own
this board, could tell me?

Sorry it's been lots of questions, thank you very much for guiding,
Thanks in advance,
Alp

2011/10/7 Idwer Vollering <vidwer at gmail.com>

> 2011/10/7 Alp Eren Köse <alperenkose at buyutech.com.tr>:
> >
> >> 1. Make sure you can recover from a bad image (extra flash chip with
> >> the original BIOS)
> >
> > Ok, I have got a spare rom which is a "SST SST49LF008A" (1024 KB, FWH)
> with
> > the original bios, but i don't have an external programmer to flash if
> the
> > first one is bricked..
>
> If you store that spare rom in a safe place and only use it to boot
> from, you don't need an external programmer. A often used trick to
> ease removal is to glue a handle to the chip:
>
> http://www.settoplinux.org/images/thumb/5/56/Push_pin2.jpg/500px-Push_pin2.jpg
>
> >
> >> 2. Make sure you can get serial output
> >
> > I believe I can do it, the board has an RS232 port, so I guess i need a
> null
> > modem cable to connect it to the computer..
> >
> >> 3. Choose the most similar supported motherboard
> >
> > I guess it is the iWave iW-RainboW-G6 as Idwer Vollering suggested..
> >
> >> 4. Change the code to support your board
> >
> > Well this is a little problem, I don't know exactly where and what to
> change
> > in the code,
> > I believe i need to make a copy of src/mainboard/iwave/iWRainbowG6 and
> > modify files to fit it my mainboard..
>
> 0) Compile crossgcc: run "make crossgcc" in the top source directory
> 1) Edit src/mainboard/Kconfig
> 2) Make a directory named axiomtek/pico821 in src/mainboard/ (run this
> in the top source code directory: mkdir -p src/mainboard
> /axiomtek/pico821 )
> 3) Add the file src/mainboard/axiomtek/Kconfig and edit that file,
> you'll want to take src/mainboard/iwave/iWRainbowG6/Kconfig as an
> example.
> 4) Copy the files from the iwave board (cd
> src/mainboard/iwave/iWRainbowG6/ ; cp -r * ../../axiomtek/pico821/ ),
> edit at least devicetree.cb, Kconfig and mainboard.c. Then replace the
> names but keep the (C) copyright headers.
> 5) "cd" back into the top source dir and run "make menuconfig ; make"
> (or make xconfig/gconfig) where you select the axiomtek mainboard.
> Exit the menu, save the configuration and run "make"; after a minute
> or so you should have the file build/coreboot.rom which you'll have to
> program into the first chip.
> 6) Make sure that you have stored the spare rom in a safe place, then
> download, compile and install flashrom:
> http://www.flashrom.org/Downloads#Installation_from_source
>
> http://www.coreboot.org/Developer_Manual#How_to_support_a_new_board
>
> > I have some C knowledge, but I would really need help, and some people to
> > show me the way what and where to change in the code at least to make it
> > work?
> >
> >> 5. Try it
> >> 6. Iterate on 4&5 until you're happy with it
> >> 7. Send a patch
> >
> > I would for sure send a patch if I can make it work :)
> > Btw the CPU and the southbridge/northbridge matches with the Rainbow-G6,
> but
> > I don't know about the SuperIO of it, there is just a "-" in the list of
> > supported motherboards for superIO of Rainbow-G6..
>
> Compile and run superiotool, it's in util/superiotool/
>
> >
> > Thanks in advance,
> > Alp
> >
> > 2011/10/5 Myles Watson <mylesgw at gmail.com>
> >>
> >> 2011/10/5 Alp Eren Köse <alperenkose at buyutech.com.tr>:
> >> > Anyone has an idea?
> >> >
> >> > Another question is I can't find my mainboard vendor "Axiomtek" in
> >> > Mainboard
> >> > Vendor selection list in menuconfig as expectedly, but all the chips
> and
> >> > chipset of it seem to be supported as I see them in coreboot website.
> Is
> >> > it
> >> > still possible to install coreboot, if so how can I do it?
> >> > It would be really nice if someone could point a way..
> >>
> >> Generally the steps are:
> >> 1. Make sure you can recover from a bad image (extra flash chip with
> >> the original BIOS)
> >> 2. Make sure you can get serial output
> >> 3. Choose the most similar supported motherboard
> >> 4. Change the code to support your board
> >> 5. Try it
> >> 6. Iterate on 4&5 until you're happy with it
> >> 7. Send a patch
> >>
> >> If you don't have 1 & 2 you shouldn't try at all.
> >>
> >> Good luck!
> >> Myles
> >
> >
> > --
> > coreboot mailing list: coreboot at coreboot.org
> > http://www.coreboot.org/mailman/listinfo/coreboot
> >
>
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