check_usb_versions.sh

#!/bin/bash
# Print a list of all USB devices in Linux along with their
# manufacturer, product name and USB version (i.e. USBv2, USBv3)

# Set DEBUG to any value to enable printing of each command
# in case you get weird output
DEBUG=""

lsusb | while read line
do
	bus=$(echo $line | cut -d ' ' -f 2)
	device=$(echo $line | cut -d ' ' -f 4)
	tmpfile=$(mktemp)
	if [ "$DEBUG" != "" ]
	then
		echo "Executing 'lsusb -v -s $bus:$device'"
	fi
	sudo lsusb -v -s $bus:$device > $tmpfile;
	product=$(cat $tmpfile | grep iProduct | head -1 | awk '{print $3}')
	mfg=$(cat $tmpfile | grep iManufacturer | head -1 | awk '{print $3}')
	usbv=$(cat $tmpfile | grep bcdUSB | head -1 | awk '{print $2}' | cut -d '.' -f 1)
	if [ "$product" = "" -o "$mfg" = "" -o "$usbv" = "" ]
	then
		echo "     --- SKIP DEVICE $bus:$device (missing values) ---"
		continue
	fi
	echo "$mfg $product :: USBv$usbv"
	rm -f $tmpfile
done

Realtek USB3.0 :: USBv3
Linux xHCI :: USBv3
     --- SKIP DEVICE 001:007: (missing values) ---
Chicony EasyCamera :: USBv2
Cisco Linksys :: USBv2
     --- SKIP DEVICE 001:003: (missing values) ---
     --- SKIP DEVICE 001:006: (missing values) ---
Logitech USB :: USBv2
Realtek USB3.0 :: USBv2
Linux xHCI :: USBv2