Hi, all! I am doing porting jobs on GX2(GX-533@1.1w) + cs5535. I am using OLPC/rev_a directory as my starting point. I know that OLPC use GX2(GX-500@1.0w, right??) + cs5536. From POST card i see the code runs far behind the code of auto.c(src/mainboard/olpc/rev_a/auto.c), and there should be some information printed from uart1, actually there is none. As for cs5536, i see cs5536_setup_onchipuart() called before uart_init(), and i find the MSRs handled in cs5536_setup_onchipuart do exist in cs5535. So i added a function named cs5535_setup_onchipuart in cs5535_early_setup.c, and call that functions in auto.c. The same result, nothing printed from uart1. I googled related information, i found someone said we must first loaded VSA before we can use internal uart of cs5535. I have a little bit understanding on VSA. From my point of view, i see VSA is an auto tools for OS to access standard x86 compatible registers and ios from not fully x86 compatible system like cs5535. And i think cs5535_setup_onchipuart handles accessing msr in cs5535 manually as what VSA should do and we do not need to firstly load VSA at auto.c. If I were right, why nothing appears from uart?? Any advice would be well appreciated.
Regards lihao 2007-02-04
lihao wrote:
I googled related information, i found someone said we must firstloaded VSA before we can use internal uart of cs5535.
This sounds nasty. Are you sure you dont have another SuperIO on board that has the serial port connected to it?
-
lihao -
Stefan Reinauer