#! /bin/sh

# waitfor_xpds: wait until all Astribanks were initialized
# $Id$

# Written by Oron Peled <oron@actcom.co.il>
# Copyright (C) 2008-2009, Xorcom
#
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#


set -e

# For lab testing
mydir=`dirname $0`
PATH="${mydir}:${PATH}"
XPP_WAIT_AB_TIMEOUT=100

[ -r /etc/dahdi/init.conf ] && . /etc/dahdi/init.conf

ab_list() {
	find /sys/devices -name idVendor 2>/dev/null | \
		xargs grep -H  'e4e4' 2>/dev/null | \
		sed -e 's/idVendor.*/idProduct/' | xargs grep -H '11[3456]' | \
		sed 's,/[^/]*$,,' || :
}

ab_serial_nums() {
	ab_list | \
		sed 's,$,/serial,' | \
		xargs grep -H '' 2>/dev/null | \
		sed 's,.*/serial:,,' | \
		sed 's/^$/NO-SERIAL/' | \
		sort -u
}

detected_serial_nums() {
	cat /sys/bus/astribanks/devices/*/transport/serial 2> /dev/null | \
		sed 's/^$/NO-SERIAL/' | \
		sort -u || :
}

calc_union() {
	echo "$@" | tr -s ' ' '\n' | sort -u
}

detected_ab_list() {
	# Only check /sys info (don't use /proc anymore).
	find /sys/bus/astribanks/devices/*/ -name waitfor_xpds 2> /dev/null || :
}

waitfor_ab_initialization() {
	oldab=''
	while
		if ! ab=`detected_ab_list`; then
			exit 1
		fi
		test "$oldab" != "$ab"
	do
		oldab="$ab"
		cat $ab
		#echo -n 1>&2 "_"
	done
}

# Any hardware?
if ! dahdi_hardware="`which dahdi_hardware 2>/dev/null`"; then
	echo >&2 "$0: Missing dahdi_hardware"
	exit 0
fi
if ! astribank_is_starting="`which astribank_is_starting 2>/dev/null`"; then
	echo >&2 "$0: Missing astribank_is_starting"
	exit 0
fi
if [ "`$dahdi_hardware | grep xpp_usb`" != "" ]; then
	astribank_is_starting -v -a
fi
if ! astribank_is_starting; then
	exit 0
fi

serial_nums=`ab_serial_nums`

# Loop until detected (hopefully) all astribanks and they are initialized
echo -n 1>&2 "Astribanks detection "
tries="$XPP_WAIT_AB_TIMEOUT"
last_detected=0
while
	new_serial_nums=`ab_serial_nums`
	detected_serial_nums=`detected_serial_nums`
	curr_union=`calc_union $curr_union $serial_nums $new_serial_nums`
	num_detected=`detected_ab_list | wc -l`
	if [ "$num_detected" != "$last_detected" ]; then
		# Visual feedback (number of detected AB so far)
		echo -n 1>&2 "[$num_detected]"
		last_detected="$num_detected"
		waitfor_ab_initialization > /dev/null
	fi
	# Break only when we have something and it's stable
	test "$curr_union" != "$detected_serial_nums" -o "$detected_serial_nums" = ''
do
	if [ "$tries" -le 0 ]; then
		echo 1>&2 "TIMEOUT"
		exit 1
	fi
	echo -n 1>&2 "."
	sleep 1
	: $((tries-=1))
	serial_nums="$new_serial_nums"
done

# Finished: Show a nice output
echo ""
cat /sys/bus/astribanks/devices/*/waitfor_xpds 2> /dev/null || :

# Wait for device to stabilize and XPD's to finish initalizations
echo 1>&2 "Astribanks initializing spans"
if [ "$XPP_HOTPLUG_DAHDI" = yes ]; then
	if [ "$CALLED_FROM_ATRIBANK_HOOK" = '' ]; then
		# Now we can wait until the hotplug run would remove the semaphore
		echo -n 1>&2 "Other DAHDI initializations... "
		astribank_is_starting -v -w 1>&2
	fi
else
	# Non-hotplug -- Sequential initialization, remove semaphore
	astribank_is_starting -v -r 1>&2
fi