Need help configuring additional serial ports - Discuss

23 Jun 2006


      I installed a 2 port serial PCI card on a system running CentOS 4.3,  
but I can't get the additional serial ports to work.  The card I used  
is from StarTech (http://www.startech.com/Product/ItemDetail.aspx? 
productid=PCI2S550&c=US).  When it is detected by kudzu, it shows up  
as a "NetMos Technologies PCI 9835 Multi I/O Controller".  I've  
included the output of "lspci" and "cat /proc/pci" below.
The (very sparse) instructions for Linux support for this card state  
that you should look for the string "serial port x" in the contents  
of /proc/pci, and then use that information with the setserial  
command to configure the port as follows:
# setserial /dev/ttyS2 port 0xc000 uart 16550 irq 11 baud_base  
115200
The problem is that I can't find the equivalent of the "0xc000" and  
the IRQ on my system in the contents of /proc/pci.  Here is what the  
built-in, working serial port looks like:
# setserial -a /dev/ttyS0
     /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
         Baud_base: 115200, close_delay: 500, divisor: 0
         closing_wait: 30000
         Flags: spd_normal skip_test auto_irq
Any ideas how to get these serial ports working?
Thanks,
Alfred
# lspci
00:00.0 Host bridge: Intel Corporation 945G/GZ/P/PL Express Memory  
Controller Hub (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 945G/GZ Express  
Integrated Graphics Controller (rev 02)
00:02.1 Display controller: Intel Corporation 945G/GZ Express  
Integrated Graphics Controller (rev 02)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High  
Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI  
Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI  
Express Port 2 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB  
UHCI #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB  
UHCI #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB  
UHCI #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB  
UHCI #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2  
EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC  
Interface Bridge (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family)  
Serial ATA Storage Controller IDE (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus  
Controller (rev 01)
02:00.0 Ethernet controller: Intel Corporation 82573E Gigabit  
Ethernet Controller (Copper) (rev 03)
0a:0a.0 Serial controller: NetMos Technology PCI 9835 Multi-I/O  
Controller (rev 01)
# cat /proc/pci
PCI devices found:
   Bus  0, device   0, function  0:
     Class 0600: PCI device 8086:2770 (rev 2).
   Bus  0, device   2, function  0:
     Class 0300: PCI device 8086:2772 (rev 2).
       IRQ 5.
       Non-prefetchable 32 bit memory at 0xd0100000 [0xd017ffff].
       I/O at 0x30c0 [0x30c7].
       Prefetchable 32 bit memory at 0xc0000000 [0xcfffffff].
       Non-prefetchable 32 bit memory at 0xd0180000 [0xd01bffff].
   Bus  0, device   2, function  1:
     Class 0380: PCI device 8086:2776 (rev 2).
       Non-prefetchable 32 bit memory at 0xd0200000 [0xd027ffff].
   Bus  0, device  27, function  0:
     Class 0403: PCI device 8086:27d8 (rev 1).
       IRQ 11.
       Non-prefetchable 64 bit memory at 0xd01c0000 [0xd01c3fff].
   Bus  0, device  28, function  0:
     Class 0604: PCI device 8086:27d0 (rev 1).
       IRQ 10.
       Master Capable.  No bursts.  Min Gnt=4.
   Bus  0, device  28, function  1:
     Class 0604: PCI device 8086:27d2 (rev 1).
       IRQ 5.
   Bus  0, device  29, function  0:
     Class 0c03: PCI device 8086:27c8 (rev 1).
       IRQ 11.
       I/O at 0x3000 [0x301f].
   Bus  0, device  29, function  1:
     Class 0c03: PCI device 8086:27c9 (rev 1).
       IRQ 9.
       I/O at 0x3020 [0x303f].
   Bus  0, device  29, function  2:
     Class 0c03: PCI device 8086:27ca (rev 1).
       IRQ 11.
       I/O at 0x3040 [0x305f].
   Bus  0, device  29, function  3:
     Class 0c03: PCI device 8086:27cb (rev 1).
       IRQ 5.
       I/O at 0x3060 [0x307f].
   Bus  0, device  29, function  7:
     Class 0c03: PCI device 8086:27cc (rev 1).
       IRQ 11.
       Non-prefetchable 32 bit memory at 0xd03c4000 [0xd03c43ff].
   Bus  0, device  30, function  0:
     Class 0604: PCI device 8086:244e (rev 225).
       Master Capable.  No bursts.  Min Gnt=4.
   Bus  0, device  31, function  0:
     Class 0601: PCI device 8086:27b8 (rev 1).
   Bus  0, device  31, function  2:
     Class 0101: PCI device 8086:27c0 (rev 1).
       IRQ 9.
       I/O at 0x30b0 [0x30bf].
   Bus  0, device  31, function  3:
     Class 0c05: PCI device 8086:27da (rev 1).
       IRQ 9.
       I/O at 0x3080 [0x309f].
   Bus  2, device   0, function  0:
     Class 0200: PCI device 8086:108c (rev 3).
       IRQ 5.
       Non-prefetchable 32 bit memory at 0xd0080000 [0xd009ffff].
       Non-prefetchable 32 bit memory at 0xd0000000 [0xd007ffff].
       I/O at 0x4000 [0x401f].
   Bus 10, device  10, function  0:
     Class 0700: PCI device 9710:9835 (rev 1).
       IRQ 11.
       Master Capable.  Latency=32.
       I/O at 0x5030 [0x5037].
       I/O at 0x5028 [0x502f].
       I/O at 0x5020 [0x5027].
       I/O at 0x5018 [0x501f].
       I/O at 0x5010 [0x5017].
       I/O at 0x5000 [0x500f].