usb serial device for older system...

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Xen
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usb serial device for older system...

Xen
Sorry for abusing this list,

But I wonder if there would be anyone technically inclined enough.......









I have a CH340 USB relais. This is run using the usbserial.ko and
ch341.ko device drivers.

On Ubuntu 16.04 this device is recognised instantly and works.

But on an older 2.6.32 system (NAS) I can load the modules just fine...

But the device is not given a /dev/ttyUSB# device.

When I search for the device in /sys based on its usb number that I get
from dmesg,

And cat all the files there, it turns out to register something under
189, X.

Normally USB serial devices go under 188, X.


Now I know that 188 means "ttyUSB" and 189 means "usb_device" so that's
not much help.



[106717.320000] usb 1-1.2: new full speed USB device using orion-ehci
and address 5
[106717.430000] Got empty serial number. Generate serial number from
product.
[106717.430000] usb 1-1.2: configuration #1 chosen from 1 choice

  /sys/devices/platform/orion-ehci.0/usb1/1-1/1-1.2/1-1.2:1.0/uevent
---
DEVNAME=1-1.2:1.0
DEVTYPE=usb_interface
DRIVER=aircable
PHYSDEVBUS=usb
PHYSDEVDRIVER=aircable
DEVICE=/proc/bus/usb/001/006
PRODUCT=1a86/7523/254
TYPE=255/0/0
INTERFACE=255/1/2
MODALIAS=usb:v1A86p7523d0254dcFFdsc00dp00icFFisc01ip02in00

/sys/devices/platform/orion-ehci.0/usb1/1-1/1-1.2/uevent
---
MAJOR=189
MINOR=5
DEVNAME=bus/usb/001/006
DEVTYPE=usb_device
DRIVER=usb
PHYSDEVBUS=usb
PHYSDEVDRIVER=usb
DEVICE=/proc/bus/usb/001/006
PRODUCT=1a86/7523/254
TYPE=255/0/0
BUSNUM=001
DEVNUM=006

How do I go about troubleshooting why it does not hook onto the CH341
driver?


insmod usbserial.ko:
---
[101405.540000] usbcore: registered new interface driver usbserial
[101405.550000] usbserial: USB Serial Driver core


insmod ch341.ko:
---
[101410.490000] USB Serial support registered for ch341-uart
[101410.540000] usbcore: registered new interface driver ch341



Ubuntu:


[   19.922291] usbcore: registered new interface driver usbserial
[   19.998511] usbcore: registered new interface driver ch341
[   19.998526] usbserial: USB Serial support registered for ch341-uart
[   19.998547] ch341 3-1.1:1.0: ch341-uart converter detected
[   20.012994] usb 3-1.1: ch341-uart converter now attached to ttyUSB0

So my driver on the other machine does not detect the ch341-uart
converter


attached to the USB port, while the USB device itself is recognised...

So I wonder what needs to happen before a

"MAJOR=188
MINOR=5"

is recognised?

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