ltq-vdsl-app: add support for auto xfer_mode and auto line_mode

If xfer_mode is set to auto the vdsl_cpe_control daemon assumes that
ATM should be used for ADSL and PTM for VDSL.

xfer_mode and line_mode can be set to fixed value independantly from
each other.

The syntax for the tc_layer argument of vdsl_cpe_control is as follow:

-T<TcADSL>:<TcCfgUsADSL>:<TcCfgDsADSL>_<TcVDSL>:<TcCfgUsVDSL>:<TcCfgDsVDSL>

where TcADSL and TcVDSL can be: 1=ATM, 2=PTM/EFM, 4=Auto TC-Layer

and TcCfgUsADSL, TcCfgUsVDSL, TcCfgDsADSL, TcCfgDsVDSL can be:
1=64/65-octet encapsulation supported
2=64/65-octet encapsulation with pre-emption
3=64/65-octet encapsulation with short packets

Default: In case of no '-T' option is given, ADSL will be configured
in ATM and VDSL in PTM/EFM: -T1:0x1:0x1_2:0x1:0x1

The '-M' argument of dsl_cpe_control defines the initial DSL mode
(NextMode) for ADSL/VDSL multimode handling.

Possible Values: 0=API-default, 1=ADSL, 2=VDSL

Default: In case of no '-M' option is given, '0' (API-default) will
be selected.

Signed-off-by: Martin Schiller <ms@dev.tdt.de>

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

@@ -180,6 +180,7 @@ start_service() {
 	local xtse
 	local xfer_mode
 	local line_mode
+	local tc_layer
 	local mode
 	local lowlevel
 	local snr
@@ -194,28 +195,24 @@ start_service() {
 
 	eval "xtse=\"\${xtse_xdsl_$annex}\""
 
-	[ -z "${xfer_mode}" ] && xfer_mode=ptm
-
 	case "${xfer_mode}" in
 	atm)
-		# in most cases atm is used on top of adsl
+		tc_layer="-T1:0x1:0x1_1:0x1:0x1"
-		[ -z "${line_mode}" ] && line_mode=adsl
 		;;
-	*)
+	ptm)
-		# in most cases ptm is used on top of vdsl
+		tc_layer="-T2:0x1:0x1_2:0x1:0x1"
-		[ -z "${line_mode}" ] && line_mode=vdsl
 		;;
 	esac
 
 	case "${line_mode}" in
 	adsl)
-		mode=1
+		mode="-M1"
 
 		# mask out VDSL bits when ADSL is requested
 		xtse="${xtse%_*}_00"
 		;;
-	*)
+	vdsl)
-		mode=2
+		mode="-M2"
 
 		# mask out ADSL bits when VDSL is requested
 		xtse="00_00_00_00_00_00_00_${xtse##*_}"
@@ -303,7 +300,8 @@ start_service() {
 			-n /sbin/dsl_notify.sh \
 			-f ${firmware} \
 			$lowlevel \
-			-M ${mode} \
+			${mode} \
+			${tc_layer} \
 			$autoboot
 	procd_close_instance
 }