[coreboot] Porting Asus A8V-VM: Problem with initializing the SuperIO

[Marc Jones]

Hi Nikolai,

On Thu, Aug 18, 2011 at 8:27 AM, Nikolai Spassoff <ns at codingrobot.com> wrote:
> I'm trying to port an Asus A8V-VM board (it has the already supported
> VIA K8M890/VT8237A and W83627EHG).
> Currently I have a major problem with getting the serial port working correctly.
>
> Booting SerialICE (rom for Asus m2v-mx_se, which has totally different
> SuperIO, but the same NB/SB) works, the serial console is fully
> accessible and qemu can talk to the board.
>
> With coreboot the board hangs on console_init() right after the serial
> port is initialized.
>
> In the attached romstage.c (http://pastebin.com/AKrr2A7i) I see output
> right before the console_init() call. It's also strange that it takes
> about 20-30 sec. to print the whole line ( print_info("pre:
> console_init()\n"); ). A char. is printed every ~2 sec.
>
> I also tried using the initialization code from already supported
> boards like A8V-E SE, still w/o any luck.
>
> Porting the already working SerialICE code (see
> http://pastebin.com/Y9Gc0U6n) to coreboot results the same slow
> printing and hang on the console_init() call.
>
> Any help would be really helpful and thanks in advance!


The board may use a different clock source/rate for the SIO. You can
google for the datasheet to get more information.

Marc

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