Initial import of OsmocomBB into git repository

1 files changed, 134 insertions, 0 deletions

diff --git a/include/l1a_l23_interface.h b/include/l1a_l23_interface.h
new file mode 100644
index 00000000..fc03d720
--- /dev/null
+++ b/include/l1a_l23_interface.h
@@ -0,0 +1,134 @@
+/* Messages to be sent between the different layers */
+
+/* (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2010 by Holger Hans Peter Freyther
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef l1a_l23_interface_h
+#define l1a_l23_interface_h
+
+#define SYNC_NEW_CCCH_REQ	1
+#define SYNC_NEW_CCCH_RESP	2
+#define CCCH_INFO_IND		3
+#define CCCH_RACH_REQ		4
+#define DEDIC_MODE_EST_REQ	5
+#define DEDIC_MODE_DATA_IND	6
+#define DEDIC_MODE_DATA_REQ	7
+#define LAYER1_RESET		8
+
+/*
+ * NOTE: struct size. We do add manual padding out of the believe
+ * that it will avoid some unaligned access.
+ */
+
+struct gsm_time {
+	uint32_t	fn;	/* FN count */
+	uint16_t	t1;	/* FN div (26*51) */
+	uint8_t		t2;	/* FN modulo 26 */
+	uint8_t		t3;	/* FN modulo 51 */
+	uint8_t		tc;
+};
+
+/*
+ * downlink info ... down from the BTS..
+ */
+struct l1_info_dl {
+	uint8_t msg_type;
+	uint8_t padding;
+	/* the ARFCN and the band. */
+	uint16_t band_arfcn;
+
+	struct gsm_time time;
+	uint8_t rx_level;
+	uint16_t snr[4];
+} __attribute__((packed));
+
+/* new CCCH was found. This is following the header */
+struct l1_sync_new_ccch_resp {
+	uint8_t bsic;
+	uint8_t padding[3];
+} __attribute__((packed));
+
+/* data on the CCCH was found. This is following the header */
+struct l1_ccch_info_ind {
+	uint8_t data[23];
+} __attribute__((packed));
+
+/*
+ * uplink info
+ */
+struct l1_info_ul {
+	uint8_t msg_type;
+	uint8_t padding;
+	uint8_t tx_power;
+	uint8_t channel_number;
+	uint32_t tdma_frame;
+} __attribute__((packed));
+
+/*
+ * msg for SYNC_NEW_CCCH_REQ
+ * the l1_info_ul header is in front
+ */
+struct l1_sync_new_ccch_req {
+	uint16_t band_arfcn;
+} __attribute__((packed));
+
+
+/* the l1_info_ul header is in front */
+struct l1_rach_req {
+	uint8_t ra;
+	uint8_t padding[3];
+} __attribute__((packed));
+
+struct l1_dedic_mode_est_req {
+	struct l1_info_ul header;
+	uint16_t band_arfcn;
+	union {
+		struct {
+			uint8_t maio_high:4,
+				 h:1,
+				 tsc:3;
+			uint8_t hsn:6,
+				 maio_low:2;
+		} h1;
+		struct {
+			uint8_t arfcn_high:2,
+				 spare:2,
+				 h:1,
+				 tsc:3;
+			uint8_t arfcn_low;
+		} h0;
+	};
+} __attribute__((packed));
+
+/* it is like the ccch ind... unite it? */
+
+/* the l1_info_dl header is in front */
+struct l1_dedic_mode_data_ind {
+	uint8_t data[23];
+} __attribute__((packed));
+
+/* the l1_info_ul header is in front */
+struct l1_dedic_mode_data_req {
+	uint8_t data[23];
+} __attribute__((packed));
+
+
+#endif