Nut upsdev - Aug 2009 - IVT SCD serial port help

guys,

A bit off topic here, but since this issue already has a history here:
serial connection to the SCD, the never ending story ...

- the intel  D945GSEJT mainboard (ICH7) has two serial ports with
onboard connectors which require a ribon cable to the external DB9
connectors in the case. I tested 5 cables, but none works. whereas I'm
not sure if it is a cable problem. this is what dmesg says when
booting (with 2 onboard ports). OS is Centos 5.3:

Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
00:03: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:04: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A

Linux helios 2.6.18-128.2.1.el5 #1 SMP Tue Jul 14 06:39:56 EDT 2009 i686 i686
i386 GNU/Linux

- the dealer says its not a cable problem and handed me a digitus pci
card with 2 serial ports on it. needless to say with this card it
doesn't work, neither. dmesg says:

Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
00:03: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:04: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
ACPI: PCI Interrupt 0000:05:00.0[A] -> GSI 20 (level, low) -> IRQ 50
0000:05:00.0: ttyS2 at I/O 0xd000 (irq = 50) is a 16550A
0000:05:00.0: ttyS3 at I/O 0xd008 (irq = 50) is a 16550A

ttyS2/3 at IRQ 50 ?!

[root at helios ~]# setserial /dev/ttyS0
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
[root at helios ~]# setserial /dev/ttyS1
/dev/ttyS1, UART: 16550A, Port: 0x02f8, IRQ: 3
[root at helios ~]# setserial /dev/ttyS2
/dev/ttyS2, UART: 16550A, Port: 0xd000, IRQ: 50
[root at helios ~]# setserial /dev/ttyS3
/dev/ttyS3, UART: 16550A, Port: 0xd008, IRQ: 50

the card came with a driver source code for linux, but it looks so
crappy I don't dare to install it (the documentation already gives a
bad impression)

and, the best thing: when connecting the rs232 cable to the serial
card, the load increases: from -1.0 to -2.0A :-(

- the 220V PC that gets a serial connection to the SCD runs Fedora
9.0, dmesg says (basically the same as centos):

Serial: 8250/16550 driver4 ports, IRQ sharing enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
00:0a: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:0b: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A

- could it be an OS problem (difference between Fedora 9 and centos
5.3) ?
- any magic parameters to setserial for ttyS2/3 ?

any help appreciated.

cu


addendum: lspci on the atom board:

00:00.0 Host bridge: Intel Corporation Mobile 945GME Express Memory Controller
Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GME Express
Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML
Express Integrated Graphics Controller (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition
Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1
(rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2
(rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3
(rev 02)
00:1c.3 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 4
(rev 02)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI
Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge
(rev 02)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller
(rev 02)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE
Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI
Express Gigabit Ethernet controller (rev 03)
05:00.0 Serial controller: Timedia Technology Co Ltd PCI2S550 (Dual 16550 UART)
(rev 01)

On Aug 6, 2009, at 4:53 PM, Rainer Fuegenstein wrote:
> ACPI: PCI Interrupt 0000:05:00.0[A] -> GSI 20 (level, low) -> IRQ 50
> 0000:05:00.0: ttyS2 at I/O 0xd000 (irq = 50) is a 16550A
> 0000:05:00.0: ttyS3 at I/O 0xd008 (irq = 50) is a 16550A
PCI interrupts often have higher numbers, which reduces confusion with  
the legacy ISA IRQs.

The PCI IDs for ttyS2 and ttyS3 match the info on the previous line.  
That should also match the output from "lspci -v".

On Aug 6, 2009, at 4:53 PM, Rainer Fuegenstein wrote:
> and, the best thing: when connecting the rs232 cable to the serial
> card, the load increases: from -1.0 to -2.0A :-(
Hmm, you might need an opto-isolated RS-232 card. Arjen mentioned  
something about a ground problem in a previous email.