Hi, all!
I am doing porting jobs on GX2([EMAIL PROTECTED]) + cs5535. I am using
OLPC/rev_a directory as my starting point. I know that OLPC use GX2([EMAIL
PROTECTED], 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
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