US Robotics (Hardware) Modem Not Detected

US Robotics (Hardware) Modem Not Detected

[Brad Davis]

I'm trying to get a PCI-USRobotics Modem (Yes, it is a true hardware
modem) working on a G4 with Kernel version 2.6.10/2.6.11.

When I try to "modprobe 8250_pci". I get the following
error message:

WARNING: Error inserting 8250
(/lib/modules/2.6.10enrock.2/kernel/drivers/serial/8250.ko): No such
device
FATAL: Error inserting 8250_pci
(/lib/modules/2.6.10enrock.2/kernel/drivers/serial/8250_pci.ko):
Unknown symbol in module, or unknown parameter (see dmesg)

It looks to me like the 8250 module isn't recognizing the modem as a
seial port. The appropriate lines from dmesg are:

serial8250_init: nothing to do on PowerMac
8250_pci: Unknown symbol serial8250_unregister_port
8250_pci: Unknown symbol serial8250_resume_port
8250_pci: Unknown symbol serial8250_register_port
8250_pci: Unknown symbol serial8250_suspend_port

The "serial_core" module is correctly loaded as it shows up with a
lsmod. I get the same results whether I enable the PCI card (via
"setpci -d 12b9:1008 command=1") before the modprobe or not.

Everything looks good with lspci -vv (below). The card has an
allocated IO address (0x1020) and IRQ (53). It is disabled (I/O-), but
I understand the serial driver will enable it when it is found. There
are no /dev/ttyS* devices, but I also understand that these will be
created by the driver/udev system when the module has been correctly
loaded. I have tried manually creating a /dev/ttyS* file and then
tried to use setserial on it, but it complains.

I am currently dual-booting this machine with 2.4.X kernel and the
modem works fine there, so I guess something has changed in the new
2.6.X modules.

Output from lspci -vv:
0001:11:03.0 Serial controller: 5610 56K FaxModem 56K FaxModem Model
5610 (rev 01) (prog-if 02 [16550])
       Subsystem: 5610 56K FaxModem USR 56k Internal Voice Modem (Model 2976)
       Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
       Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium
>TAbort- <TAbort- <MAbort- >SERR- <PERR-
       Interrupt: pin A routed to IRQ 53
       Region 0: I/O ports at 1020 [disabled] [size=8]
       Capabilities: [dc] Power Management version 2
               Flags: PMEClk- DSI- D1- D2+ AuxCurrent=0mA
PME(D0+,D1-,D2+,D3hot+,D3cold+)
               Status: D0 PME-Enable- DSel=0 DScale=2 PME-

Can someone point me in the right direction to get this card working
with the 2.6 kernel stream?

Thanks in advance for any help.

Brad
--
enrock@gmail.com

Re: US Robotics (Hardware) Modem Not Detected

[Russell King]

On Wed, Jul 27, 2005 at 07:45:21AM -0600, Brad Davis wrote:
> I'm trying to get a PCI-USRobotics Modem (Yes, it is a true hardware
> modem) working on a G4 with Kernel version 2.6.10/2.6.11.
> 
> When I try to "modprobe 8250_pci". I get the following
> error message:
> 
> WARNING: Error inserting 8250
> (/lib/modules/2.6.10enrock.2/kernel/drivers/serial/8250.ko): No such
> device

This would be the root case.  8250 is _never_ supposed to fail with
ENODEV, even if it doesn't detect any devices itself.  And doesn't
fail like this.

> FATAL: Error inserting 8250_pci
> (/lib/modules/2.6.10enrock.2/kernel/drivers/serial/8250_pci.ko):
> Unknown symbol in module, or unknown parameter (see dmesg)
> 
> It looks to me like the 8250 module isn't recognizing the modem as a
> seial port. The appropriate lines from dmesg are:
> 
> serial8250_init: nothing to do on PowerMac

serial8250_init does not contain any such message, so you're not
running a mainline kernel, but some patched version.  Are these
patches available somewhere?

I guess these patches are your problem, and it seems that there's
at least one which is completely unnecessary or inappropriate.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core

Re: US Robotics (Hardware) Modem Not Detected

[Brad Davis]

On 7/27/05, Russell King <rmk+lkml@arm.linux.org.uk> wrote:
> serial8250_init does not contain any such message, so you're not
> running a mainline kernel, but some patched version.  Are these
> patches available somewhere?

I'm compiling from the Ubuntu (based on Debian) sources. I'll either
download a clean kernel source tonight and try it out or try remove
the patches to the serial driver and try that.
 
> I guess these patches are your problem, and it seems that there's
> at least one which is completely unnecessary or inappropriate.

Thanks for the help, I'll post my results.

Brad
-- 
enrock@gmail.com

Re: US Robotics (Hardware) Modem Not Detected

[Brad Davis]

On 7/27/05, Brad Davis <enrock@gmail.com> wrote:
> On 7/27/05, Russell King <rmk+lkml@arm.linux.org.uk> wrote:
> > serial8250_init does not contain any such message, so you're not
> > running a mainline kernel, but some patched version.  Are these
> > patches available somewhere?
> 
> I'm compiling from the Ubuntu (based on Debian) sources. I'll either
> download a clean kernel source tonight and try it out or try remove
> the patches to the serial driver and try that.
> 
OK. I got the modem working. I used the Ubuntu sources (2.6.10), but
replaced the serial driver code with the pristine code from 2.6.10.
I'll have to follow up with the debian or ubuntu people.

Thanks for the help, and sorry to have bothered you with a
distribution specific issue.

Brad
-- 
enrock@gmail.com