re-work original osmo-bts with support for sysmocom femtobts

This code re-works osmo-bts to add support for the upcoming sysmocom BTS.

It also tries to add some level of abstraction between the generic
part of a BTS (A-bis, RSL, OML, data structures, paging scheduling,
BCCH/AGCH scheduling, etc.) and the actual hardware-specific bits.

The hardware-specific bits are currently only implemented for the sysmocom
femtobts, but should be (re-)added for osmocom-bb, as well as a virtual
BTS for simulation purpose later.

The sysmocom bts specific parts require hardware-specific header files
which are (at least currently) not publicly distributed.

1 files changed, 57 insertions, 0 deletions

diff --git a/include/osmo-bts/gsm_data.h b/include/osmo-bts/gsm_data.h
new file mode 100644
index 00000000..2498f7d0
--- /dev/null
+++ b/include/osmo-bts/gsm_data.h
@@ -0,0 +1,57 @@
+#ifndef _GSM_DATA_H
+#define _GSM_DATA_H
+
+#include <osmocom/core/timer.h>
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/gsm/lapdm.h>
+
+#include <osmo-bts/paging.h>
+
+struct gsm_network {
+
+};
+
+/* data structure for BTS related data specific to the BTS role */
+struct gsm_bts_role_bts {
+	struct {
+		/* Interference Boundaries for OML */
+		int16_t boundary[6];
+		uint8_t intave;
+	} interference;
+	unsigned int t200_ms[7];
+	unsigned int t3105_ms;
+	struct {
+		uint8_t overload_period;
+		struct {
+			/* Input parameters from OML */
+			uint8_t load_ind_thresh;	/* percent */
+			uint8_t load_ind_period;	/* seconds */
+			/* Internal data */
+			struct osmo_timer_list timer;
+			unsigned int pch_total;
+			unsigned int pch_used;
+		} ccch;
+		struct {
+			/* Input parameters from OML */
+			int16_t busy_thresh;		/* in dBm */
+			uint16_t averaging_slots;
+		} rach;
+	} load;
+	uint8_t ny1;
+	uint8_t max_ta;
+	struct llist_head agch_queue;
+	struct paging_state *paging_state;
+};
+
+#define bts_role_bts(x)	((struct gsm_bts_role_bts *)(x)->role)
+
+#include "../../openbsc/openbsc/include/openbsc/gsm_data_shared.h"
+
+struct femtol1_hdl;
+
+static inline struct femtol1_hdl *trx_femtol1_hdl(struct gsm_bts_trx *trx)
+{
+	return trx->role_bts.l1h;
+}
+
+#endif /* _GSM_DATA_H */