PCI-e rs232 card on linux

[Dan]

For the benefit of the list I think I have resolved this issue for the
time being.

I am running 2.6.11-1.1369_FC4smp and both ports appear work fine. Under
2.6.11-1.1369 i need to manually configure the ports using setserial.

Under 2.6.14-2.6.16 kernels there appears to be an issue with this
particular PCI-e card. At best one port was showing up. At worst I was
seeing irq conflicts and kernel oopses/exceptions which resulted in eth0
failing. At this point i did not bother testing the rs232 ports - working
ethernet is more critical.

So it would appear something after 2.6.11 has changed which affects this
card.

I would really like to nail this issue once and for all - does anyone have
any tips on how I could locate the exact cause? Im not a huge kernel or C
guru so any tips would be appreciated.

Cheers,

Dan

On Fri, April 7, 2006 11:12 am, Dan wrote:
> I have a PCI express rs232 card made by these people: www.softio.com. In
> particular I am using several ic0658kb in several machines. Dell Poweredge
> 850s to be precise, using the A02 bios firmware.
>
>
> The softio people say their cards are supported in Linux, but I suspect
> the 2.6 kernel's serial driver does not know/recognize the device id of
> this card.
>
> Here is what lspci says:
>
>
> 02:00.0 Class 0700: 1415:950b (prog-if 06)
> Subsystem: 1415:0001
> Flags: medium devsel, IRQ 169
> I/O ports at ecf8 [size=8]
> Memory at fe9ff000 (32-bit, non-prefetchable) [size=4K]
> I/O ports at ece0 [size=16]
> Memory at fe9fe000 (32-bit, non-prefetchable) [size=4K]
> Memory at fe9fd000 (32-bit, non-prefetchable) [size=4K]
> Capabilities: [40] Power Management version 1
>
>
> 02:01.0 Class 0700: 1415:950b (prog-if 06)
> Subsystem: 1415:0001
> Flags: medium devsel, IRQ 50
> I/O ports at ecf0 [size=8]
> Memory at fe9fc000 (32-bit, non-prefetchable) [size=4K]
> I/O ports at ecd0 [size=16]
> Memory at fe9fb000 (32-bit, non-prefetchable) [size=4K]
> Memory at fe9fa000 (32-bit, non-prefetchable) [size=4K]
> Capabilities: [40] Power Management version 1
>
>
>
> When inspecting dmesg I notice the following, which seems relevant at
> this point:
>
> 00:07: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> ACPI: PCI Interrupt 0000:02:00.0[A] -> GSI 16 (level, low) -> IRQ 169
> ACPI: PCI interrupt for device 0000:02:00.0 disabled
> ACPI: PCI Interrupt 0000:02:01.0[A] -> GSI 17 (level, low) -> IRQ 50
> ACPI: PCI interrupt for device 0000:02:01.0 disabled
>
>
> The softio people suggested i manually try configuring the devices with
> setserial but i did not think this would work:
>
> setserial /dev/ttyS4 Port 0xecf8 IRQ 169 UART 16950 baud_base 115200
> setserial /dev/ttyS5 Port 0xecf0 IRQ 50 UART 16950 baud_base 115200
>
> However the device nodes did not exist.
>
>
> Bit of googling shows the chip used on this card has been used in pcmcia
> serial controllers, but thats of little help as this device is PCI express.
>
>
> What do I need to do to get this card to work? Anyone know?
>
>
> Cheers,
>
>
> Dan
>
>
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