On 05/30/2013 05:15 PM, wolfking wrote:
hi, tiejun.chen: When I use ioremap, the card seems to work fine. That is, I can access
Yes, ioremap() should work for MMIO.
part of all register. My PCIe card is a rs232 expand card, it has some standard UART register, for example the SCR(scratch register). My driver can access the SCR(write and read) normally, but the other registers behave odd. For example, the DLM should be 0, but it reads 5. The card has a software reset bit, when it is set to 1, the card reset itself. When it finished reset, this reset bit should be back to 0. But In sbc8548, when I set this bit, it remains high. So I guess, the area I accessed is not the PCIe card,
I suspect you're missing some load/storage sync code, so what is your R/W function exactly?
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