On Wed, Nov 25, 2015 at 09:54:58AM -0600, Dan Williams wrote:
> On Wed, 2015-11-25 at 13:13 +0100, M. Hrdlička wrote:
> > Hello,
> > log script told me, that I may to tell you about add this device to
> > propper linux driver.
> >
> > Device is combo USB modem Celot CTD-200, manufacturing date in
> > September 2010, it´s combinated GSM (GPRS/UMTS/HSPA) and CDMA modem.
> > I run this device with usbserial driver, adding this line in
> > /etc/udev/rules.d/90-celot-combo.rules:
> > ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="211f",
> > ATTR{idProduct}=="6805", RUN+="/sbin/modprobe usbserial vendor=0x211f
> > product=0x6805"
> > ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="211f",
> > ATTR{idProduct}=="6809", RUN+="/sbin/modprobe usbserial vendor=0x211f
> > product=0x6809"
> >
> > In windows driver and connect program, there is choice to switch
> > between GSM and CDMA network mode. In my linux instalation only one
> > mode working - preferred is GSM mode. When I commented GSM line in
> > /etc/udev/rules.d (id 6809), then CDMA works and ModemManager make
> > ttyUSB ports.
> >
> > I have OpenSuse 13.1 with standard kernel 3.11.10-29
> >
> > Attached extract of /var/log/messages and lsusb command.
> >
>
> The modem appears to have two Qualcomm chips in it, one for CDMA and
> the other for GSM/WCDMA, but this is not a Gobi-type modem. The
> connection manager appears to use QCDM to talk to the modem on Windows,
> but normal AT commands on Mac OS X. The Windows CM has some mechanism
> for switching between the two modes and will even tell you if it can
> find a faster HSPA link while you're on CDMA.
>
> In any case, I think the 'option' driver is most appropriate for this
> device's two USB IDs. Communication traces of the Windows CM switching
> between this device's modes would be necessary to figure out switching
> between CDMA and GSM/WCDMA on Linux.
Does anyone care to write up a patch for this?
Thanks,
Johan
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