Hi,
on the working hardware (its an older h/w version ) we got it fixed by
the H/W vendor to class "ff" and our request to change the class to "ff"
was denied by the vendor for the newer version (reasons unknown).
So, I am exploring the alternative methods to load the
"usbserial-generic" for the newer hardware too.
coming to your suggestion, how do I select the proper configuration?
This modem Hardware has some storage space too. This is recognized as a
storage device on WIN XP as well as Ubuntu.
Thanks & regards
Murali
On Mon, 2010-03-08 at 09:42 +0800, Rajaram R wrote:
> On Mon, Mar 8, 2010 at 8:39 AM, Murali K. Vemuri <murali@xxxxxxxxxxx> wrote:
> >
> > Hi,
> > I am using linux kernel 2.6.19 ported onto a proprietary hardware.
> > I am connecting a USB Modem that is being recognized by the driver as :
> > "storage card".
> >
> > I did "cat /proc/bus/usb/devices" to find the information about the
> > driver and found these lines:
> >
> > C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=500mA
> > I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50
> > Driver=usb-storage
> >
> > I checked the same values for another modem which was working good for
> > application: and I got this output:
> >
> > C:* #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=500mA
> > I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff
> > Driver=usbserial_generic
> >
> >
> > As you can see, the driver that is loaded in the working case is
> > different from the non-working.
>
> Why your "modem" showing cls = 08 ? Is it a composite device ? i guess
> you need to select the proper configuration.
>
> Is the device not working on a standard Linux PC ?
>
> >
> > Is it possible to force load the drver as usbserial-generic?
> >
> > I tried to dig a little further to dump the following data structure for
> > both the modems and to my surprise all the fields were same except
> > bcdUSB.
> >
> > struct usb_device_descriptor {
> > __u8 bLength;
> > __u8 bDescriptorType;
> >
> > __le16 bcdUSB;
> > __u8 bDeviceClass;
> > __u8 bDeviceSubClass;
> > __u8 bDeviceProtocol;
> > __u8 bMaxPacketSize0;
> > __le16 idVendor;
> > __le16 idProduct;
> > __le16 bcdDevice;
> > __u8 iManufacturer;
> > __u8 iProduct;
> > __u8 iSerialNumber;
> > __u8 bNumConfigurations;
> > } __attribute__ ((packed));
> >
> > Is there some other place where I can force the kernel to load the
> > driver differently?
> >
> > Thanks in advance
> > Murali
> > --
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>
>
>
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