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Old 09-03-2008, 03:28 PM
Enoch W.
 
Default PCI modem not recognized by the serial driver

Hi fellows,


Can someone tell me why this PCI based modem is not recognized by the
serial driver or, what does error code -28 mean?
It's a "3Com Corp, Modem Division 56K FaxModem Model 5610c" internal
board, flashed to their latest firmware. It was recognized a short while
ago by another FreeBSD system...


Thanks, Enoch.



uname -a:

~~~~~~~

Linux sat1 2.6.25-2-686 #1 SMP Fri Jul 18 17:46:56 UTC 2008 i686 GNU/Linux


dmesg:

~~~~~

Couldn't register serial port 0000:00:12.0: -28



lspci -v:

~~~~~

00:12.0 Serial controller: 3Com Corp, Modem Division 56K FaxModem Model
5610 (rev 01) (prog-if 02)

Subsystem: 3Com Corp, Modem Division Device 00d3
Flags: medium devsel, IRQ 5
I/O ports at fc18 [size=8]
Capabilities: [dc] Power Management version 2
Kernel driver in use: serial

hwinfo:

~~~~~

PCI 12.0: 0700 Serial controller (16550)
[Created at pci.310]
UDI: /org/freedesktop/Hal/devices/pci_12b9_1008
Unique ID: CLZK.lJy1rsroej9
SysFS ID: /devices/pci0000:00/0000:00:12.0
SysFS BusID: 0000:00:12.0
Hardware Class: unknown
Model: "U.S. Robotics 56K FaxModem Model 5610"
Vendor: pci 0x12b9 "U.S. Robotics, Inc."
Device: pci 0x1008 "56K FaxModem Model 5610"
SubVendor: pci 0x12b9 "U.S. Robotics, Inc."
SubDevice: pci 0x00d3
Revision: 0x01
Driver: "serial"
I/O Ports: 0xfc18-0xfc1f (rw)
IRQ: 5 (3283 events)
Module Alias: "pci:v000012B9d00001008sv000012B9sd000000D3bc07sc0 0i02"
Config Status: cfg=new, avail=yes, need=no, active=unknown




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Old 09-04-2008, 09:33 PM
Enoch W.
 
Default PCI modem not recognized by the serial driver

Answering my own question for you, the future google seeker.
This PC has 4 serial ports and for the PCI modem it needed to create a
5th ttyS4. 4 serial ports however is the kernel default max and at boot
time I needed to add to /boot/grub/menu.lst a 8250.nr_uarts=5 option.

I am coming from a FreeBSD background where kernel tweaks like this one
are very well documented. Where's the place to seek similar help in Debian?

Thanks, Enoch.


Enoch W. wrote:
> Hi fellows,
>
>
> Can someone tell me why this PCI based modem is not recognized by the
> serial driver or, what does error code -28 mean?
> It's a "3Com Corp, Modem Division 56K FaxModem Model 5610c" internal
> board, flashed to their latest firmware. It was recognized a short while
> ago by another FreeBSD system...
>
>
> Thanks, Enoch.
>
>
>
> uname -a:
> ~~~~~~~
> Linux sat1 2.6.25-2-686 #1 SMP Fri Jul 18 17:46:56 UTC 2008 i686 GNU/Linux
>
> dmesg:
> ~~~~~
> Couldn't register serial port 0000:00:12.0: -28
>
>
>
> lspci -v:
> ~~~~~
> 00:12.0 Serial controller: 3Com Corp, Modem Division 56K FaxModem Model
> 5610 (rev 01) (prog-if 02)
>
> Subsystem: 3Com Corp, Modem Division Device 00d3
> Flags: medium devsel, IRQ 5
> I/O ports at fc18 [size=8]
> Capabilities: [dc] Power Management version 2
> Kernel driver in use: serial
>
> hwinfo:
> ~~~~~
> PCI 12.0: 0700 Serial controller (16550)
> [Created at pci.310]
> UDI: /org/freedesktop/Hal/devices/pci_12b9_1008
> Unique ID: CLZK.lJy1rsroej9
> SysFS ID: /devices/pci0000:00/0000:00:12.0
> SysFS BusID: 0000:00:12.0
> Hardware Class: unknown
> Model: "U.S. Robotics 56K FaxModem Model 5610"
> Vendor: pci 0x12b9 "U.S. Robotics, Inc."
> Device: pci 0x1008 "56K FaxModem Model 5610"
> SubVendor: pci 0x12b9 "U.S. Robotics, Inc."
> SubDevice: pci 0x00d3
> Revision: 0x01
> Driver: "serial"
> I/O Ports: 0xfc18-0xfc1f (rw)
> IRQ: 5 (3283 events)
> Module Alias: "pci:v000012B9d00001008sv000012B9sd000000D3bc07sc0 0i02"
> Config Status: cfg=new, avail=yes, need=no, active=unknown



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Old 09-04-2008, 10:04 PM
dann frazier
 
Default PCI modem not recognized by the serial driver

On Thu, Sep 04, 2008 at 05:33:17PM -0400, Enoch W. wrote:
>
> Answering my own question for you, the future google seeker.
> This PC has 4 serial ports and for the PCI modem it needed to create a
> 5th ttyS4. 4 serial ports however is the kernel default max and at boot
> time I needed to add to /boot/grub/menu.lst a 8250.nr_uarts=5 option.

Thanks for following up

> I am coming from a FreeBSD background where kernel tweaks like this one
> are very well documented. Where's the place to seek similar help in
> Debian?

/usr/share/doc/linux-doc-<ver>/Documentation/kernel-parameters.txt.gz

--
dann frazier


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