#!/bin/sh
# dump some usb registers
# usbreg.sh <bus-number>

check_platform() {
	local _hw

	_hw=`grep '^Hardware' /proc/cpuinfo`

	[ "${_hw#*AM33XX}" = "$_hw" ] || { PLATFORM="am335x"; return 0; }
	[ "${_hw#*AM43}" = "$_hw" ] || { PLATFORM="am437x"; return 0; }
	[ "${_hw#*DRA74X}" = "$_hw" ] || { PLATFORM="am57x"; return 0; }
	PLATFORM="unkown"
	return 1
}

[ "$1" = "" ] && {
	echo '    bus #0:'
	$0 0
	echo '    bus #1:'
	$0 1
	exit 0
}

bus=$1

[ "$bus" = "0" ] || [ "$bus" = "1" ] ||
	{ echo "Error: unknown bus number"; exit 1; }

check_platform

case $PLATFORM in
	am335x) bus_ent=musb-hdrc.${bus}.auto ;;
	am437x) bus_ent=`printf "%x" $((0x48390000+${bus}*0x40000))`.usb ;;
	am57x) bus_ent=`printf "%x" $((0x48890000+${bus}*0x40000))`.usb ;;
	*)
		echo "Error: unknown platform"
		exit 2 ;;
esac

entry=/sys/kernel/debug/${bus_ent}/regdump

[ -f $entry ] || { echo "$entry not found"; exit 3; }

case $PLATFORM in
	am335x)
		grep 'Power\|DevCtl' $entry ;;
	*)
		grep GCTL $entry
		grep DCTL $entry
		grep 'OCFG\|OCTL\|OSTS' $entry
		;;
esac