topic Re: Monitoring gadget events or g_ether events to run custom ifup script in i.MX Processors

Monitoring gadget events or g_ether events to run custom ifup script

kevin_chaves — Mon, 21 Apr 2014 15:58:42 GMT

I'm trying to find where in linux i would be able to setup the network interface for g_ether. Basically I want to run avahi-autoipd and dhcpd on the usb0 interface when it comes up. The problem is that linux isn't as transparent about how all this things are supposed to work. I worked with wince previously and what I want to do was really simple registry options...

So in my /etc/network/interfaces I have set usb0 as manual with custom scripts for up/down.

allow-howplug usb0

iface usb0 inet manual

up /path/to/script

down /path/to/script

When I plug in my device to a host pc, neither is run. I guess i don't really understand how g_ether acts as a network interface since it doesn't seem to know its available, and doesn't run ifup for it. If i run ifup usb0 the scripts will run.

I'm thinking i can create a udev rule, when the usb is plugged in, to run ifup usb0 and ifdown usb0 depending on the state.

Any help would be much appreciated.

Re: Monitoring gadget events or g_ether events to run custom ifup script

kevin_chaves — Mon, 21 Apr 2014 22:01:39 GMT

There might be an issue with our otg driver, or board... I'm not sure.

It seems regardless of whether or not I've plugged the usb in, the device is always down. That might be why allow-hotplug doesn't work?

# cat carrier

cat: read error: Invalid argument

# cat operstate

down

Re: Monitoring gadget events or g_ether events to run custom ifup script

jamesbone — Tue, 06 May 2014 14:30:42 GMT

Hello Kevin,

What board are you using?, because I have seen in the schematics of the i.MX6Solo EVK that the USB OTG share pins with the USB Host so you always begin with the device down, to avoid a hardware issue. If this is the case we can test in a WandBoard. to see if the problem persist.

Have a great day,
Jaime

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