ltq-vdsl-app: make it possible to configure ADSL/VDSL independently

There are some cases where ISPs are running ATM over VDSL or PTM over
ADSL, this is not the common case, but these cases exist. Make it
possible to configure OpenWrt for such cases by adding a new config
option line_mode.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 48947

package/network/config/ltq-vdsl-app/files/dsl_control

@@ -162,6 +162,8 @@ start_service() {
 	local tone_adsl
 	local tone_vdsl
 	local xtse
+	local xfer_mode
+	local line_mode
 	local mode
 	local lowlevel
 
@@ -170,6 +172,7 @@ start_service() {
 	config_get annex dsl annex
 	config_get firmware dsl firmware
 	config_get xfer_mode dsl xfer_mode
+	config_get line_mode dsl line_mode
 
 	eval "xtse=\"\${xtse_xdsl_$annex}\""
 
@@ -179,14 +182,27 @@ start_service() {
 	atm)
 		LOAD=ltq_atm_vr9
 		UNLOAD=ltq_ptm_vr9
+
+		# in most cases atm is used on top of adsl
+		[ -z "${line_mode}" ] && line_mode=adsl
+		;;
+	*)
+		LOAD=ltq_ptm_vr9
+		UNLOAD=ltq_atm_vr9
+
+		# in most cases ptm is used on top of vdsl
+		[ -z "${line_mode}" ] && line_mode=vdsl
+		;;
+	esac
+
+	case "${line_mode}" in
+	adsl)
 		mode=1
 
 		# mask out VDSL bits when ATM is requested
 		xtse="${xtse%_*}_00"
 		;;
 	*)
-		LOAD=ltq_ptm_vr9
-		UNLOAD=ltq_atm_vr9
 		mode=2
 		;;
 	esac