VTY: make target uplink Rx level VTY-configurable

We used to have -75 dBm as the target value for the uplink receive
level.  Now this is configurable.

The parameter is used as input into the power control loop that adjusts
the MS transmit power in order to achieve the target rx value on the
BTS Rx input.

4 files changed, 19 insertions, 1 deletions

diff --git a/src/osmo-bts-sysmo/l1_if.c b/src/osmo-bts-sysmo/l1_if.c
index f28e22b..7e4c6db 100644
--- a/src/osmo-bts-sysmo/l1_if.c
+++ b/src/osmo-bts-sysmo/l1_if.c
@@ -1181,6 +1181,7 @@ struct femtol1_hdl *l1if_open(void *priv)
 
 	fl1h->priv = priv;
 	fl1h->clk_cal = 0;
+	fl1h->ul_power_target = -75;	/* dBm default */
 	/* default clock source: OCXO */
 #if SUPERFEMTO_API_VERSION >= SUPERFEMTO_API(2,1,0)
 	fl1h->clk_src = SuperFemto_ClkSrcId_Ocxo;
diff --git a/src/osmo-bts-sysmo/l1_if.h b/src/osmo-bts-sysmo/l1_if.h
index 4afbca0..05cc316 100644
--- a/src/osmo-bts-sysmo/l1_if.h
+++ b/src/osmo-bts-sysmo/l1_if.h
@@ -32,6 +32,7 @@ struct femtol1_hdl {
 	uint32_t hLayer1;			/* handle to the L1 instance in the DSP */
 	uint32_t dsp_trace_f;
 	int clk_cal;
+	int ul_power_target;
 	uint8_t clk_src;
 	char *calib_path;
 	struct llist_head wlc_list;
diff --git a/src/osmo-bts-sysmo/oml.c b/src/osmo-bts-sysmo/oml.c
index 1240b2b..97a488f 100644
--- a/src/osmo-bts-sysmo/oml.c
+++ b/src/osmo-bts-sysmo/oml.c
@@ -279,7 +279,7 @@ static int trx_init(struct gsm_bts_trx *trx)
 	dev_par->u16Arfcn = trx->arfcn;
 	dev_par->u16BcchArfcn = trx->bts->c0->arfcn;
 	dev_par->u8NbTsc = trx->bts->bsic & 7;
-	dev_par->fRxPowerLevel = -75.f;
+	dev_par->fRxPowerLevel = fl1h->ul_power_target;
 	dev_par->fTxPowerLevel = trx->nominal_power - trx->max_power_red;
 	LOGP(DL1C, LOGL_NOTICE, "Init TRX (ARFCN %u, TSC %u, RxPower % 2f dBm, "
 		"TxPower % 2.2f dBm\n", dev_par->u16Arfcn, dev_par->u8NbTsc,
diff --git a/src/osmo-bts-sysmo/sysmobts_vty.c b/src/osmo-bts-sysmo/sysmobts_vty.c
index 6c454bf..fd82db0 100644
--- a/src/osmo-bts-sysmo/sysmobts_vty.c
+++ b/src/osmo-bts-sysmo/sysmobts_vty.c
@@ -161,6 +161,19 @@ DEFUN(cfg_trx_cal_path, cfg_trx_cal_path_cmd,
 	return CMD_SUCCESS;
 }
 
+DEFUN(cfg_trx_ul_power_target, cfg_trx_ul_power_target_cmd,
+	"uplink-power-target <-110-0>",
+	"Set the nominal target Rx Level for uplink power control loop\n"
+	"Target uplink Rx level in dBm\n")
+{
+	struct gsm_bts_trx *trx = vty->index;
+	struct femtol1_hdl *fl1h = trx_femtol1_hdl(trx);
+
+	fl1h->ul_power_target = atoi(argv[0]);
+
+	return CMD_SUCCESS;
+}
+
 /* runtime */
 
 DEFUN(show_trx_clksrc, show_trx_clksrc_cmd,
@@ -414,6 +427,8 @@ void bts_model_config_write_trx(struct vty *vty, struct gsm_bts_trx *trx)
 	vty_out(vty, "  clock-source %s%s",
 		get_value_string(femtobts_clksrc_names, fl1h->clk_src),
 		VTY_NEWLINE);
+	vty_out(vty, "  uplink-power-target %d%s", fl1h->ul_power_target,
+		VTY_NEWLINE);
 
 	for (i = 0; i < 32; i++) {
 		if (fl1h->gsmtap_sapi_mask & (1 << i)) {
@@ -475,6 +490,7 @@ int bts_model_vty_init(struct gsm_bts *bts)
 	install_element(TRX_NODE, &cfg_trx_cal_path_cmd);
 	install_element(TRX_NODE, &cfg_trx_gsmtap_sapi_cmd);
 	install_element(TRX_NODE, &cfg_trx_no_gsmtap_sapi_cmd);
+	install_element(TRX_NODE, &cfg_trx_ul_power_target_cmd);
 
 	return 0;
 }