[coreboot] Getting serial output from w83627hf?

[Idwer Vollering]

Comments inline:

2011/10/17 Idwer Vollering <vidwer at gmail.com>

>
>
> 2011/10/17 Alp Eren Köse <alperenkose at buyutech.com.tr>
>
>> Hi all,
>>
>> I can't get serial output from the board I am trying to put coreboot on,
>> so I am not able to go any further to see whats going on..
>>
>
>> The board has a Winbond W83627HF/F/HG/G (id=0x52, rev=0x41) at 0x2e.
>>
>
> It is likely that you need to set the serial port's speed in romstage.c:
>
> // omitting includes, license header
> #include "superio/winbond/w83627hf/early_serial.c"
> #define SERIAL_DEV PNP_DEV(0x2e, W83627HF_SP1)
>
> Add this line to main():
> w83627hf_set_clksel_48(SERIAL_DEV);
>

The bit that controls the clock speed is in CR24.


>
>
>>
>> I couldn't figure out where to put the "chip superio/winbond/w83627hf"
>> section in the "devicetree.cb" file layout?
>>
>
> SCH boards don't use the serial port but the EHCI debug port to show output
> on? See src/mainboard/iwave/iWRainbowG6/devicetree.cb, it doesn't have the
> superio included.
>
> What I would do is put it inside the LPC bridge section, note that I don't
> know how the superio is actually attached and therefore could be wrong.
> So:
>         chip southbridge/intel/i82801ex
>

Replace i82801ex with sch, ofcourse.


>             device pci 1f.0 on # lpc bridge
>                 chip superio/winbond/w83627hf
>                 end # superio
>             end # 1f.0
>
>
>
>> Could someone please explain the devicetree.cb file structure? or point a
>> way?
>>
>> The "lspci -tvnn" output and my modified "devicetree.cb" file are at the
>> attachment.
>>
>
Can you show the output from "superiotool -deV"  too? Thanks.


>> Thanks in advance,
>> Alp
>>
>> --
>> coreboot mailing list: coreboot at coreboot.org
>> http://www.coreboot.org/mailman/listinfo/coreboot
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.coreboot.org/pipermail/coreboot/attachments/20111017/0f6e1505/attachment.html>