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>
tone_adsl_bv="0x81" # B43 + B43c
tone_vdsl_bv="0x5" # B43 + V43
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 $1
+}
+
+[WaitForLinkActivate]={
+}
+
+[WaitForRestart]={
+}
+
+[Common]={
+}" > /tmp/adsl.scr
+}
+
lowlevel_cfg() {
echo "# VRX Low Level Configuration File
#
lowlevel_cfg() {
echo "# VRX Low Level Configuration File
#
local line_mode
local mode
local lowlevel
local line_mode
local mode
local lowlevel
config_load network
config_get tone dsl tone
config_load network
config_get tone dsl tone
config_get firmware dsl firmware
config_get xfer_mode dsl xfer_mode
config_get line_mode dsl line_mode
config_get firmware dsl firmware
config_get xfer_mode dsl xfer_mode
config_get line_mode dsl line_mode
+ config_get snr dsl ds_snr_offset
eval "xtse=\"\${xtse_xdsl_$annex}\""
eval "xtse=\"\${xtse_xdsl_$annex}\""
lowlevel="-l /tmp/lowlevel.cfg"
}
lowlevel="-l /tmp/lowlevel.cfg"
}
+ [ -z "${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} \
$lowlevel \
procd_open_instance
procd_set_param command /sbin/vdsl_cpe_control_wrapper \
-i$xtse \
-n /sbin/dsl_notify.sh \
-f ${firmware} \
$lowlevel \
+ -M ${mode} \
+ $autoboot
procd_append_param env "LOAD=$LOAD" "UNLOAD=$UNLOAD"
procd_close_instance
}
procd_append_param env "LOAD=$LOAD" "UNLOAD=$UNLOAD"
procd_close_instance
}