Introduce NM BTS Site Manager FSM

Change-Id: Ic001ce6ebeff6f51470ef58140b0235f4a30265e
diff --git a/include/osmocom/bsc/nm_common_fsm.h b/include/osmocom/bsc/nm_common_fsm.h
new file mode 100644
index 0000000..a76c198
--- /dev/null
+++ b/include/osmocom/bsc/nm_common_fsm.h
@@ -0,0 +1,46 @@
+/* Header for all NM FSM. Following 3GPP TS 12.21 Figure 2/GSM 12.21:
+  GSM 12.21 Objects' Operational state and availability status behaviour during initialization */
+
+/* (C) 2020 by sysmocom - s.m.f.c. GmbH <info@sysmocom.de>
+ * Author: Pau Espin Pedrol <pespin@sysmocom.de>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#pragma once
+
+#include <osmocom/core/fsm.h>
+#include <osmocom/core/utils.h>
+
+/* Common */
+enum nm_fsm_events {
+	NM_EV_SW_ACT_REP,
+	NM_EV_STATE_CHG_REP,
+	NM_EV_OPSTART_ACK,
+	NM_EV_OPSTART_NACK,
+	NM_EV_OML_DOWN,
+};
+extern const struct value_string nm_fsm_event_names[];
+
+/* BTS SiteManager */
+enum nm_bts_sm_op_fsm_states {
+	NM_BTS_SM_ST_OP_DISABLED_NOTINSTALLED,
+	NM_BTS_SM_ST_OP_DISABLED_DEPENDENCY,
+	NM_BTS_SM_ST_OP_DISABLED_OFFLINE,
+	NM_BTS_SM_ST_OP_ENABLED,
+};
+extern struct osmo_fsm nm_bts_sm_fsm;