[layer23] Added support for changing TCH mode via L1CTL messages

include/l1ctl_proto.h

@@ -49,6 +49,8 @@ enum {
 	L1CTL_CRYPTO_REQ,
 	L1CTL_SIM_REQ,
 	L1CTL_SIM_CONF,
+	L1CTL_TCH_MODE_REQ,
+	L1CTL_TCH_MODE_CONF,
 };
 
 enum ccch_mode {
@@ -107,6 +109,12 @@ struct l1ctl_ccch_mode_conf {
 	uint8_t padding[3];
 } __attribute__((packed));
 
+/* TCH mode was changed */
+struct l1ctl_tch_mode_conf {
+	uint8_t tch_mode;	/* enum tch_mode */
+	uint8_t padding[3];
+} __attribute__((packed));
+
 /* data on the CCCH was found. This is following the header */
 struct l1ctl_data_ind {
 	uint8_t data[23];
@@ -156,6 +164,15 @@ struct l1ctl_ccch_mode_req {
 	uint8_t padding[3];
 } __attribute__((packed));
 
+/*
+ * msg for TCH_MODE_REQ
+ * the l1_info_ul header is in front
+ */
+struct l1ctl_tch_mode_req {
+	uint8_t tch_mode;	/* enum gsm48_chan_mode */
+	uint8_t padding[3];
+} __attribute__((packed));
+
 /* the l1_info_ul header is in front */
 struct l1ctl_rach_req {
 	uint8_t ra;

src/host/layer23/include/osmocom/bb/common/l1ctl.h

@@ -46,6 +46,9 @@ int l1ctl_tx_fbsb_req(struct osmocom_ms *ms, uint16_t arfcn,
 /* Transmit CCCH_MODE_REQ */
 int l1ctl_tx_ccch_mode_req(struct osmocom_ms *ms, uint8_t ccch_mode);
 
+/* Transmit TCH_MODE_REQ */
+int l1ctl_tx_tch_mode_req(struct osmocom_ms *ms, uint8_t tch_mode);
+
 /* Transmit ECHO_REQ */
 int l1ctl_tx_echo_req(struct osmocom_ms *ms, unsigned int len);
 

src/host/layer23/include/osmocom/bb/common/osmocom_data.h

@@ -75,6 +75,7 @@ enum osmobb_meas_sig {
 	S_L1CTL_PM_RES,
 	S_L1CTL_PM_DONE,
 	S_L1CTL_CCCH_MODE_CONF,
+	S_L1CTL_TCH_MODE_CONF,
 };
 
 struct osmobb_fbsb_res {
@@ -94,4 +95,9 @@ struct osmobb_ccch_mode_conf {
 	uint8_t ccch_mode;
 };
 
+struct osmobb_tch_mode_conf {
+	struct osmocom_ms *ms;
+	uint8_t tch_mode;
+};
+
 #endif

src/host/layer23/src/common/l1ctl.c

@@ -302,6 +302,24 @@ int l1ctl_tx_ccch_mode_req(struct osmocom_ms *ms, uint8_t ccch_mode)
 	return osmo_send_l1(ms, msg);
 }
 
+/* Transmit L1CTL_TCH_MODE_REQ */
+int l1ctl_tx_tch_mode_req(struct osmocom_ms *ms, uint8_t tch_mode)
+{
+	struct msgb *msg;
+	struct l1ctl_tch_mode_req *req;
+
+	printf("TCH Mode Req\n");
+
+	msg = osmo_l1_alloc(L1CTL_TCH_MODE_REQ);
+	if (!msg)
+		return -1;
+
+	req = (struct l1ctl_tch_mode_req *) msgb_put(msg, sizeof(*req));
+	req->tch_mode = tch_mode;
+
+	return osmo_send_l1(ms, msg);
+}
+
 /* Transmit L1CTL_PARAM_REQ */
 int l1ctl_tx_param_req(struct osmocom_ms *ms, uint8_t ta, uint8_t tx_power)
 {
@@ -622,7 +640,7 @@ static int rx_l1_pm_conf(struct osmocom_ms *ms, struct msgb *msg)
 	return 0;
 }
 
-/* Receive L1CTL_MODE_CONF */
+/* Receive L1CTL_CCCH_MODE_CONF */
 static int rx_l1_ccch_mode_conf(struct osmocom_ms *ms, struct msgb *msg)
 {
 	struct osmobb_ccch_mode_conf mc;
@@ -645,6 +663,29 @@ static int rx_l1_ccch_mode_conf(struct osmocom_ms *ms, struct msgb *msg)
 	return 0;
 }
 
+/* Receive L1CTL_TCH_MODE_CONF */
+static int rx_l1_tch_mode_conf(struct osmocom_ms *ms, struct msgb *msg)
+{
+	struct osmobb_tch_mode_conf mc;
+	struct l1ctl_tch_mode_conf *conf;
+
+	if (msgb_l3len(msg) < sizeof(*conf)) {
+		LOGP(DL1C, LOGL_ERROR, "MODE CONF: MSG too short %u\n",
+			msgb_l3len(msg));
+		return -1;
+	}
+
+	conf = (struct l1ctl_tch_mode_conf *) msg->l1h;
+
+	printf("mode=%u\n", conf->tch_mode);
+
+	mc.tch_mode = conf->tch_mode;
+	mc.ms = ms;
+	dispatch_signal(SS_L1CTL, S_L1CTL_TCH_MODE_CONF, &mc);
+
+	return 0;
+}
+
 /* Receive incoming data from L1 using L1CTL format */
 int l1ctl_recv(struct osmocom_ms *ms, struct msgb *msg)
 {
@@ -694,6 +735,10 @@ int l1ctl_recv(struct osmocom_ms *ms, struct msgb *msg)
 		rc = rx_l1_ccch_mode_conf(ms, msg);
 		msgb_free(msg);
 		break;
+	case L1CTL_TCH_MODE_CONF:
+		rc = rx_l1_tch_mode_conf(ms, msg);
+		msgb_free(msg);
+		break;
 	case L1CTL_SIM_CONF:
 		rc = rx_l1_sim_conf(ms, msg);
 		break;