I had the same issue, the USB was working for my keyboard and mouse but my iphone and ipod were not working.
After several things as suggested here (disable legacy, update the file IOUSBFamily.kext. etc..) it was not working.
As I have an old AMD CPU with no SSE3, I was using kernel 9.0.0
After the update from http://netkas.org/ to 9.2.0, the USB is now working!!!

If it could help you

KrisT@uF