HI 
I am having to get working a versalogic VL-MPEe-U2 serial port. it is a minipcie quad serial card with XR17V354 UART.

This device is memory mapped , not i/o mapped.

in the last generic  BSP for x86 i found a devc-ser8250 that can work with io mapped devices, but only i can make work 
the frst port.

if i type devc-ser8250 -m [address], [IRQ]
i get /dev/ser3 ( the board have 2 more integrated serial ports).

i tried it making a loopback and using qtalk. for some strange reason it only works to 9600. after that i receive 
garbage.

when i try starting the other ports the driver hangs
devc-ser8250 -m -u3 [address],[IRQ]  -u4 [address+8 ],[IRQ] -u5 [address+16],[IRQ] -u6 [address+24],[IRQ]