On Mon, Dec 11, 2006 at 11:27:40AM +0000, Adam Laurie wrote:
> Folks,
> 
> I've developed an open-source python library for RFID, called RFIDIOt 
> (http://rfidiot.org), which works with ACG serial RFID readers. I've 
> just acquired the USB version of the reader and wanted to add support 
> for it, but it isn't immediately recognised by the usbserial driver and 
> I wondered if anyone had any ideas on how to get it fired up?
> 
> Contents of /proc/bus/usb/devices:
> 
>    T:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  5 Spd=12  MxCh= 0
>    D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
>    P:  Vendor=0403 ProdID=dd20 Rev= 4.00
>    S:  Manufacturer=ACG Austria
>    S:  Product=USB Converter
>    S:  SerialNumber=49502950
>    C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=500mA
>    I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
>    E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
>    E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
> 
> When I manually load the driver, I get the following in dmesg:
> 
> # modprobe usbserial vendor=0x0403 product=0xdd20 debug

As you found out, that's not going to really work :)

I suggest you contact the vendor to try to get the protocol used to talk
to this device.  Or take it apart and see if it has a chip in it that we
already have a driver for (like the pl2303 or ftdi_sio driver.)  Then
just add your device id to that driver and you should be fine.

Good luck,

greg k-h

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