udev rule for matching USB class and subclass?

[Petter Reinholdtsen]

[Felipe Sateler]
> Yes the documentation is quite poor in this regard.

I am glad I found you, then, to let me know about the MODALIAS
attribute. :)

> But, modalias may be even the wrong match. A usb thumb drive I have (I
> don't have a smartcard reader) does not have a MODALIAS set (you can
> see the properties with `udevadm info`), although there are
> intermediate paths that do have it.

Wow, I thought the kernel synthesized modalias fields for all hardware
it knew about, and have never seen any USB unit where the kernel did not
provide a modalias file.

> What does `udevadm info` say about the device?

For my test unit I get this:

P: /devices/pci0000:00/0000:00:1a.0/usb1/1-1
N: bus/usb/001/000
E: BUSNUM=001
E: DEVNAME=/dev/bus/usb/001/000
E: DEVNUM=000
E: DEVPATH=/devices/pci0000:00/0000:00:1a.0/usb1/1-1
E: DEVTYPE=usb_device
E: DRIVER=usb
E: ID_BUS=usb
E: ID_MODEL=Tenx_Nonstandard_Devic
E: ID_MODEL_ENC=Tenx\x20Nonstandard\x20Devic
E: ID_MODEL_FROM_DATABASE=Rocket Launcher
E: ID_MODEL_ID=0202
E: ID_REVISION=0100
E: ID_SERIAL=1130_Tenx_Nonstandard_Devic
E: ID_USB_INTERFACES=:030000:
E: ID_VENDOR=1130
E: ID_VENDOR_ENC=1130
E: ID_VENDOR_FROM_DATABASE=Tenx Technology, Inc.
E: ID_VENDOR_ID=1130
E: MAJOR=189
E: MINOR=1
E: PRODUCT=1130/202/100
E: SUBSYSTEM=usb
E: TYPE=0/0/0
E: USEC_INITIALIZED=671889072

And /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1:1.0/modalias
contain usb:v1130p0202d0100dc00dsc00dp00ic03isc00ip00in00.

I'm testing using my USB Rocket Launcher to use USB unit that is not
handled by any of the packages I need to have installed on my machine.

-- 
Happy hacking
Petter Reinholdtsen