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#!/bin/bash

# Copyright: 2009 Greg Kroah-Hartman <greg@kroah.com>
# 2009 Randy Dunlap <rdunlap@xenotime.net>
# 2009 Frans Pop <elendil@planet.nl>
#
# This software may be used and distributed according to the terms of
# the GNU General Public License (GPL), version 2, or at your option
# any later version.

print_string() {
file=$1
name=$2
if [ -f $file ]; then
echo "S: $name=`cat $file`"
fi
}

class_decode() {
local class=$1 # v4: in hex

case $class in
"00") echo ">ifc " ;;
"01") echo "audio" ;;
"02") echo "commc" ;;
"03") echo "HID " ;;
"05") echo "PID " ;;
"06") echo "still" ;;
"07") echo "print" ;;
"08") echo "stor." ;;
"09") echo "hub " ;;
"0a") echo "data " ;;
"0b") echo "scard" ;;
"0d") echo "c-sec" ;;
"0e") echo "video" ;;
"0f") echo "perhc" ;;
"dc") echo "diagd" ;;
"e0") echo "wlcon" ;;
"ef") echo "misc " ;;
"fe") echo "app. " ;;
"ff") echo "vend." ;;
"*") echo "unk. " ;;
esac
}

print_endpoint() {
local eppath=$1

addr=`cat $eppath/bEndpointAddress`
attr=`cat $eppath/bmAttributes`
dir=`cat $eppath/direction`
eptype=`cat $eppath/type`
maxps_hex="0x`cat $eppath/wMaxPacketSize`"
# Extract MaxPS size (bits 0-10) and multiplicity values (bits 11-12)
maxps=`printf "%4i*%s\n" $(($maxps_hex & 0x7ff)) \
$((1 + (($maxps_hex >> 11) & 0x3)))`
interval=`cat $eppath/interval`

printf "E: Ad=%s(%s) Atr=%s(%s) MxPS=%s Ivl=%s\n" \
$addr $dir $attr $eptype "$maxps" $interval
}

print_interface() {
local ifpath=$1

ifnum=`cat $ifpath/bInterfaceNumber`
altset=`cat $ifpath/bAlternateSetting`
numeps=`cat $ifpath/bNumEndpoints`
class=`cat $ifpath/bInterfaceClass`
subclass=`cat $ifpath/bInterfaceSubClass`
protocol=`cat $ifpath/bInterfaceProtocol`
if [ -L $ifpath/driver ]; then # v4: allow for no driver
driver=`readlink $ifpath/driver`
driver=`basename $driver`
else
driver="(none)"
fi
classname=`class_decode $class`
printf "I: If#=%2i Alt=%2i #EPs=%2i Cls=%s(%s) Sub=%s Prot=%s Driver=%s\n" \
$ifnum $altset $numeps $class "$classname" $subclass \
$protocol $driver

for endpoint in $ifpath/ep_??
do
if [ -L $endpoint ]; then # v4: verify endpoint exists
print_endpoint $endpoint
fi
done
}

print_device() {
local devpath=$1
local parent=$2
local level=$3
local count=$4

[ -d $devpath ] || return
cd $devpath

local busnum=`cat busnum`
local devnum=`cat devnum`

if [ $level -gt 0 ]; then
port=$((${devpath##*[-.]} - 1))
else
port=0
fi
speed=`cat speed`
maxchild=`cat maxchild`
printf "\nT: Bus=%02i Lev=%02i Prnt=%02i Port=%02i Cnt=%02i Dev#=%3i Spd=%-3s MxCh=%2i\n" \
$busnum $level $parent $port $count $devnum $speed $maxchild

ver=`cat version`
devclass=`cat bDeviceClass`
devsubclass=`cat bDeviceSubClass`
devprotocol=`cat bDeviceProtocol`
maxps0=`cat bMaxPacketSize0`
numconfigs=`cat bNumConfigurations`
classname=`class_decode $devclass`
printf "D: Ver=%5s Cls=%s(%s) Sub=%s Prot=%s MxPS=%2i #Cfgs=%3i\n" \
$ver $devclass "$classname" $devsubclass $devprotocol \
$maxps0 $numconfigs

vendid=`cat idVendor`
prodid=`cat idProduct`
revmajor=`cat bcdDevice | cut -c 1-2`
revminor=`cat bcdDevice | cut -c 3-4`
printf "P: Vendor=%s ProdID=%s Rev=%s.%s\n" \
$vendid $prodid $revmajor $revminor

print_string manufacturer "Manufacturer"
print_string product Product
print_string serial SerialNumber

numifs=`cat bNumInterfaces`
cfgnum=`cat bConfigurationValue`
attr=`cat bmAttributes`
maxpower=`cat bMaxPower`
printf "C: #Ifs=%2i Cfg#=%2i Atr=%s MxPwr=%s\n" \
$numifs $cfgnum $attr $maxpower

# There's not really any useful info in endpoint 00
#print_endpoint $devpath/ep_00

for interface in $busnum-*:?.*
do
print_interface $devpath/$interface
done

local devcount=0
for subdev in $busnum-*
do
echo "$subdev" | grep -Eq "^$busnum-[0-9]+(\.[0-9]+)*$" \
|| continue

devcount=$(($devcount + 1))
if [ -d $devpath/$subdev ]; then
print_device $devpath/$subdev \
$devnum $(($level +1)) $devcount
fi
done
}

if [ ! -d /sys/bus ]; then
echo "Error: directory /sys/bus does not exist; is sysfs mounted?" >&2
exit 1
fi

for device in /sys/bus/usb/devices/usb*
do
print_device $device 0 0 0
done
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