diff --git a/Transceiver52M/Makefile.am b/Transceiver52M/Makefile.am
index 681809f..f8556f0 100644
--- a/Transceiver52M/Makefile.am
+++ b/Transceiver52M/Makefile.am
@@ -80,6 +80,7 @@
 TRXCON_LDADD = \
 	$(top_builddir)/osmocom-bb/src/host/trxcon/src/.libs/libtrxcon.a \
 	$(top_builddir)/osmocom-bb/src/host/trxcon/src/.libs/libl1sched.a \
+	$(top_builddir)/osmocom-bb/src/host/trxcon/src/.libs/libl1gprs.a \
 	$(LIBOSMOCODING_LIBS)
 
 MS_LOWER_SRC = \
diff --git a/Transceiver52M/ms/logging.c b/Transceiver52M/ms/logging.c
index ee59299..af397e0 100644
--- a/Transceiver52M/ms/logging.c
+++ b/Transceiver52M/ms/logging.c
@@ -1,5 +1,7 @@
 /*
- * (C) 2016-2022 by Vadim Yanitskiy <axilirator@gmail.com>
+ * OsmocomBB <-> SDR connection bridge
+ *
+ * (C) 2016-2017 by Vadim Yanitskiy <axilirator@gmail.com>
  *
  * All Rights Reserved
  *
@@ -19,48 +21,61 @@
 #include <osmocom/core/logging.h>
 #include <osmocom/core/utils.h>
 
-#include <osmocom/bb/trxcon/logging.h>
 #include <osmocom/bb/trxcon/trxcon.h>
+#include <osmocom/bb/trxcon/logging.h>
 
 static struct log_info_cat trxcon_log_info_cat[] = {
 	[DAPP] = {
 		.name = "DAPP",
-		.color = "\033[1;35m",
 		.description = "Application",
-		.loglevel = LOGL_NOTICE,
-		.enabled = 1,
+		.color = "\033[1;35m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
 	},
 	[DL1C] = {
 		.name = "DL1C",
-		.color = "\033[1;31m",
 		.description = "Layer 1 control interface",
-		.loglevel = LOGL_NOTICE,
-		.enabled = 1,
+		.color = "\033[1;31m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
 	},
 	[DL1D] = {
 		.name = "DL1D",
-		.color = "\033[1;31m",
 		.description = "Layer 1 data",
-		.loglevel = LOGL_NOTICE,
-		.enabled = 1,
+		.color = "\033[1;31m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
+	},
+	[DTRXC] = {
+		.name = "DTRXC",
+		.description = "Transceiver control interface",
+		.color = "\033[1;33m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
+	},
+	[DTRXD] = {
+		.name = "DTRXD",
+		.description = "Transceiver data interface",
+		.color = "\033[1;33m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
 	},
 	[DSCH] = {
 		.name = "DSCH",
-		.color = "\033[1;36m",
 		.description = "Scheduler management",
-		.loglevel = LOGL_NOTICE,
-		.enabled = 0,
+		.color = "\033[1;36m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
 	},
 	[DSCHD] = {
 		.name = "DSCHD",
-		.color = "\033[1;36m",
 		.description = "Scheduler data",
-		.loglevel = LOGL_NOTICE,
-		.enabled = 0,
+		.color = "\033[1;36m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
+	},
+	[DGPRS] = {
+		.name = "DGPRS",
+		.description = "L1 GPRS (MAC layer)",
+		.color = "\033[1;36m",
+		.enabled = 1, .loglevel = LOGL_NOTICE,
 	},
 };
 
-static struct log_info trxcon_log_info = {
+static const struct log_info trxcon_log_info = {
 	.cat = trxcon_log_info_cat,
 	.num_cat = ARRAY_SIZE(trxcon_log_info_cat),
 };
@@ -71,6 +86,7 @@
 	[TRXCON_LOGC_L1D] = DL1D,
 	[TRXCON_LOGC_SCHC] = DSCH,
 	[TRXCON_LOGC_SCHD] = DSCHD,
+	[TRXCON_LOGC_GPRS] = DGPRS,
 };
 
 void trxc_log_init(void *tallctx)
diff --git a/Transceiver52M/ms/ms_upper.cpp b/Transceiver52M/ms/ms_upper.cpp
index 4b2f919..0a2c333 100644
--- a/Transceiver52M/ms/ms_upper.cpp
+++ b/Transceiver52M/ms/ms_upper.cpp
@@ -395,7 +395,7 @@
 	msgb_talloc_ctx_init(tall_trxcon_ctx, 0);
 	trxc_log_init(tall_trxcon_ctx);
 
-	g_trxcon = trxcon_inst_alloc(tall_trxcon_ctx, 0, 0);
+	g_trxcon = trxcon_inst_alloc(tall_trxcon_ctx, 0);
 	g_trxcon->gsmtap = nullptr;
 	g_trxcon->phyif = nullptr;
 	g_trxcon->phy_quirks.fbsb_extend_fns = 866; // 4 seconds, known to work.
diff --git a/osmocom-bb b/osmocom-bb
index c209242..3f409eb 160000
--- a/osmocom-bb
+++ b/osmocom-bb
@@ -1 +1 @@
-Subproject commit c209242d196a9c30401c383104f5063d4dbde4cd
+Subproject commit 3f409eb94eac9ffa67a7528f29f58275f0b836b8