Lantiq: make possible to tweak DSL SRN from UCI

This patch makes possible to tweak the downstream SNR margin on
Lantiq DSL devices.

The UCI parameter 'network.dsl.ds_snr_offset' is used to set the SNR
margin offset. It accepts values in range -50 to +50 in 0.1 dB units.

The SNR margin can thus be modified in range -5.0 to +5.0 dB in 0.1 dB
steps.

Currently this should only affect ADSL (not VDSL). It should be very
easy to make this work also on VDSL lines, but since I couldn't test
on VDSL lines this patch does not do that yet.

I have also a patch for LUCI about this, that I could submit.

Tested on FB3370 (Lantiq VR9) and Telecom Italia ADSL2+ line.

Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
This commit is contained in:
Andrea Merello 2017-05-13 17:16:13 +02:00 committed by Hauke Mehrtens
parent 63a20c95fd
commit 860e053b29

View File

@ -96,6 +96,22 @@ tone_vdsl_b="0x1" # B43
tone_adsl_bv="0x81" # B43 + B43c
tone_vdsl_bv="0x5" # B43 + V43
# create ADSL autoboot script. Used for SNR margin tweak
autoboot_script() {
echo "[WaitForConfiguration]={
locs 0 $1
}
[WaitForLinkActivate]={
}
[WaitForRestart]={
}
[Common]={
}" > /tmp/adsl.scr
}
lowlevel_cfg() {
echo "# VRX Low Level Configuration File
#
@ -166,6 +182,7 @@ start_service() {
local line_mode
local mode
local lowlevel
local snr
config_load network
config_get tone dsl tone
@ -173,6 +190,7 @@ start_service() {
config_get firmware dsl firmware
config_get xfer_mode dsl xfer_mode
config_get line_mode dsl line_mode
config_get snr dsl ds_snr_offset
eval "xtse=\"\${xtse_xdsl_$annex}\""
@ -262,13 +280,20 @@ start_service() {
lowlevel="-l /tmp/lowlevel.cfg"
}
[ -z "${snr}" ] || {
# for SNR offset setting
autoboot_script "$snr"
autoboot="-a /tmp/adsl.scr"
}
procd_open_instance
procd_set_param command /sbin/vdsl_cpe_control_wrapper \
-i$xtse \
-n /sbin/dsl_notify.sh \
-f ${firmware} \
$lowlevel \
-M ${mode}
-M ${mode} \
$autoboot
procd_append_param env "LOAD=$LOAD" "UNLOAD=$UNLOAD"
procd_close_instance
}