Alfred von Campe wrote:
I have installed two 4-port serial cards (http://www.startech.com/
Product/ItemDetail.aspx?productid=PCI4S550&c=US) on a CentOS 4.4
system. The hardware appears to be recognized correctly, as kudzu
added 2 entries to /etc/sysconfig/hwconf and lscpi shows both cards
(output of lspci -vv for both cards included at the end of this email):
# lspci
00:00.0 Host bridge: Intel Corporation 945G/GZ/P/PL Express Memory
Controller Hub (rev 02)
00:01.0 PCI bridge: Intel Corporation 945G/GZ/P/PL Express PCI Express
Root Port (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)
01:00.0 VGA compatible controller: nVidia Corporation NV44 [GeForce
6200 TurboCache(TM)] (rev a1)
02:00.0 Ethernet controller: Intel Corporation 82573E Gigabit Ethernet
Controller (Copper) (rev 03)
0a:0a.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad
16950 UART) function 0 (Uart)
0a:0a.1 Bridge: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART)
function 1 (8bit bus)
0a:0c.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad
16950 UART) function 0 (Uart)
0a:0c.1 Bridge: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART)
function 1 (8bit bus)
However, only the 4 serial ports on one of the two cards are configured
correctly:
# dmesg | fgrep ttyS
ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
ttyS4 at I/O 0x5020 (irq = 177) is a 16C950/954
ttyS5 at I/O 0x5028 (irq = 177) is a 16C950/954
ttyS6 at I/O 0x5030 (irq = 177) is a 16C950/954
ttyS7 at I/O 0x5038 (irq = 177) is a 16C950/954
ttyS1 at I/O 0x5060 (irq = 193) is a 16450
ttyS2 at I/O 0x5068 (irq = 193) is a 16450
ttyS3 at I/O 0x5070 (irq = 193) is a 16450
I have no idea what ttyS1-3 are, but I've tested ttyS4-7 and they work
fine. If I only install one card (in either PCI slot 1 or 2) I get the
same 4 ports. If I install both cards, ttyS4-7 work on the card that
is in PCI slot 2.
Never used these cards, but the standard CentOS4 kernel has the
following config settings:
CONFIG_SERIAL_8250_NR_UARTS=4
# CONFIG_SERIAL_8250_MANY_PORTS is not set
This might be your problem ...
James Pearson
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