#!/bin/sh
# watch USB state, by Thomas Tanner, requires coreutils-gnu

t0=`date +%s`
f=/tmp/usbst
echo > $f
while true; do
    sleep 0.05
    st=`head -n2 /proc/driver/musb_hdrc`
    echo $st | cmp -s $f - && continue
    t=$((`date +%s`-t0))
    echo change +$t @ `date +"%X %N"`
    echo $st > $f
    echo $st
    power=`echo "$st" | sed "s/.*Power=\(.*\),.*/0x\1/g;q"`
    decpwr=
    for flag in ensuspend suspendm remuse reset hsmode hsenab softconn isoupdate; do
        test $((power % 2)) = 1 && decpwr="$decpwr$flag "
        #decpwr="$decpwr$flag=$((power % 2)) "
        power=$((power/2))
    done
    echo POWER: $decpwr
    devctl=`echo "$st" | sed "s/.*DevCtl=\(.*\)).*/0x\1/g;q"`
    decdev=
    for flag in session hr hm vbusshift vbus lsdev fsdev bdevice; do
        test $((devctl % 2)) = 1 && decdev="$decdev$flag "
        #decdev="$decdev$flag=$((devctl % 2)) "
        devctl=$((devctl/2))
    done
    echo DEVCTL: $decdev
    echo
done