PCI-modem setup problems

[Rich Johnson <rjohnson@dogstar-interactive.com>]

Hi folks--
I'm trying to add a modem to a Dell Precision 410 running  debian 
testing on top of Linux 2.2.6

One think I can't figure out is its device--/dev/ttyS??.

"lspci -vv" reports:
0000:00:10.0 Serial controller: 5610 56K FaxModem 56K FaxModem Model 
5610 (rev 01) (prog-if 02 [16550])
        Subsystem: 5610 56K FaxModem: Unknown device baba
        Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- 
ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium 
>TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Interrupt: pin A routed to IRQ 19
        Region 0: I/O ports at dcd8
        Capabilities: [dc] Power Management version 2
                Flags: PMEClk- DSI- D1- D2+ AuxCurrent=0mA 
PME(D0+,D1-,D2+,D3hot+,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=2 PME-


How do I verify that I gen'd the kernel with the appropriate driver?  
Did I miss a module?  Should I worry about that "Unknown device baba"?

and setserial /dev/ttyS0 reports
/dev/ttyS0, UART: unknown, Port: 0x03f8, IRQ: 4
Did I miss a driver here?

Thanks,
--rich