Geode SC1100 i2c bus

[Cats]

> On Sunday 04 February 2007 22:24, Cats wrote:
>> I played a bit today with Geode registers.
>>
>> Well, I tried to tweak the /usr/src/sys/i386/i386/geode.c
>>
>> *** 198,203 ****
>> --- 198,207 ----
>> * people think their box just died. */ led_func(&led1b, 1);
>> +                         outb(0x2E,0x7); // Select LDN Page 80 +
>>                       outb(0x2F,0x2); // Put 02h in LDN to select
>> IR Port +                       outb(0x2E,0x30); // Select
>> Logical Device Control Register +
>> outb(0x2F,inb (0x2F)+1); // Set LDCR[0] to enable IR port } if (
>> strlen(bios_oem) ) printf("Geode %s\n", bios_oem);
>>
>> After rebooting with the new kernel I got this in the dmesg:
>>
>> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
>> sio0: type 16550A, console
>> sio1: configured irq 3 not in bitmap of probed irqs 0
>> sio1: port may not be enabled
>> sio1 at port 0x2f8-0x2ff irq 3 on isa0
>> sio1: type 16550A
>>
>> Yes, the IR port is seen as a standard serial port and I have the
>> cuad1* and ttyd1* in the /dev
>>
>> Well of course none of IRRCX1 and IRTX pins are wired on the wrap
>> board, so no way to test it.
>>
>> This might be a trick to enable the ACBbuses on the geode to have
>> them recognized by a driver on the isa bus.
>>
>> Got to try when I'll have some spare time.
>>
>
> It will not work, there is much more to do. As shown in your test,
> even second serial will not work because irq routing is not set.
> But I will try to analyze Pascal's sources and compare it to my
> older work, maybe I can find the problem, just wait a bit... I will
> keep you informed if I achieve any progress... Milan

Ok thanks, 
I'll check on my side what I can do... ;-)

Cedric