import some gsm band/arfcn/time related utilities from OsmocomBB

[osmocom-bb.git] / include / osmocore / gsm_utils.h

diff --git a/include/osmocore/gsm_utils.h b/include/osmocore/gsm_utils.h
index b611050..2536045 100644 (file)
--- a/include/osmocore/gsm_utils.h
+++ b/include/osmocore/gsm_utils.h
@@ -27,6 +27,14 @@
 
 #include <stdint.h>
 
+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;
+};
+
 enum gsm_band {
        GSM_BAND_850    = 1,
        GSM_BAND_900    = 2,
@@ -58,5 +66,19 @@ static inline int rach_max_trans_raw2val(int raw) {
        return tbl[raw & 3];
 }
 
+#define        ARFCN_PCS       0x8000
+#define        ARFCN_UPLINK    0x4000
+
+enum gsm_band gsm_arfcn2band(uint16_t arfcn);
+
+/* Convert an ARFCN to the frequency in MHz * 10 */
+uint16_t gsm_arfcn2freq10(uint16_t arfcn, int uplink);
+
+/* Convert from frame number to GSM time */
+void gsm_fn2gsmtime(struct gsm_time *time, uint32_t fn);
+
+/* Convert from GSM time to frame number */
+uint32_t gsm_gsmtime2fn(struct gsm_time *time);
+
 void generate_backtrace();
 #endif