sysmobts: make L1 power configurable

The TRX nominal output power (as seen by OML) is the aggregate power
of any gain internal to the sysmoBTS (and managed by L1) and any
external PA.  This is what is used in trx->nominal_power;

fl1h->l1_power is the transmit power to which we configure the sysmoBTS
L1.  This is 23 dBm (200mW) by default in the sysmoBTS 1002, and 40 dBm
(5W) in the sysmoBTS 2050.  However, if sysmoBTS 2050 is used in
single-TRX configuration, it may be used with higher power, which we can
now configure in the config file / vty.

TODO: A separate, additional field that keeps track of any gain added by
an external PA, e.g. if the sysmoBTS 1002 is used with a sysmoAMP.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/osmo-bts-sysmo/sysmobts_vty.c b/src/osmo-bts-sysmo/sysmobts_vty.c
index 21b7f89..e509124 100644
--- a/src/osmo-bts-sysmo/sysmobts_vty.c
+++ b/src/osmo-bts-sysmo/sysmobts_vty.c
@@ -45,6 +45,7 @@
 
 #include "femtobts.h"
 #include "l1_if.h"
+#include "utils.h"
 
 
 extern int lchan_activate(struct gsm_lchan *lchan, enum gsm_lchan_state lchan_state);
@@ -241,6 +242,19 @@ DEFUN(cfg_trx_min_qual_norm, cfg_trx_min_qual_norm_cmd,
 	return CMD_SUCCESS;
 }
 
+DEFUN(cfg_trx_nominal_power, cfg_trx_nominal_power_cmd,
+	"nominal-tx-power <0-100>",
+	"Set the nominal transmit output power in dBm\n"
+	"Nominal transmit output power level in dBm\n")
+{
+	struct gsm_bts_trx *trx = vty->index;
+
+	trx->nominal_power = atoi(argv[0]);
+
+	return CMD_SUCCESS;
+}
+
+
 /* runtime */
 
 DEFUN(show_trx_clksrc, show_trx_clksrc_cmd,
@@ -508,6 +522,9 @@ void bts_model_config_write_trx(struct vty *vty, struct gsm_bts_trx *trx)
 		VTY_NEWLINE);
 	vty_out(vty, "  min-qual-norm %.0f%s", fl1h->min_qual_norm * 10.0f,
 		VTY_NEWLINE);
+	if (trx->nominal_power != sysmobts_get_nominal_power(trx))
+		vty_out(vty, "  nominal-tx-power %d%s", trx->nominal_power,
+			VTY_NEWLINE);
 
 	for (i = 0; i < 32; i++) {
 		if (fl1h->gsmtap_sapi_mask & (1 << i)) {
@@ -576,6 +593,7 @@ int bts_model_vty_init(struct gsm_bts *bts)
 	install_element(TRX_NODE, &cfg_trx_ul_power_target_cmd);
 	install_element(TRX_NODE, &cfg_trx_min_qual_rach_cmd);
 	install_element(TRX_NODE, &cfg_trx_min_qual_norm_cmd);
+	install_element(TRX_NODE, &cfg_trx_nominal_power_cmd);
 
 	return 0;
 }