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.
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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