1 /* GSM utility functions, e.g. coding and decoding */
3 * (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de>
4 * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
5 * (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
31 uint32_t fn; /* FN count */
32 uint16_t t1; /* FN div (26*51) */
33 uint8_t t2; /* FN modulo 26 */
34 uint8_t t3; /* FN modulo 51 */
49 char *gsm_band_name(enum gsm_band band);
50 enum gsm_band gsm_band_parse(const char *mhz);
52 int gsm_7bit_decode(char *decoded, const uint8_t *user_data, uint8_t length);
53 int gsm_7bit_encode(uint8_t *result, const char *data);
55 int ms_pwr_ctl_lvl(enum gsm_band band, unsigned int dbm);
56 int ms_pwr_dbm(enum gsm_band band, uint8_t lvl);
58 /* According to TS 08.05 Chapter 8.1.4 */
59 int rxlev2dbm(uint8_t rxlev);
60 uint8_t dbm2rxlev(int dbm);
62 /* According to GSM 04.08 Chapter 10.5.2.29 */
63 static inline int rach_max_trans_val2raw(int val) { return (val >> 1) & 3; }
64 static inline int rach_max_trans_raw2val(int raw) {
65 const int tbl[4] = { 1, 2, 4, 7 };
69 #define ARFCN_PCS 0x8000
70 #define ARFCN_UPLINK 0x4000
72 enum gsm_band gsm_arfcn2band(uint16_t arfcn);
74 /* Convert an ARFCN to the frequency in MHz * 10 */
75 uint16_t gsm_arfcn2freq10(uint16_t arfcn, int uplink);
77 /* Convert from frame number to GSM time */
78 void gsm_fn2gsmtime(struct gsm_time *time, uint32_t fn);
80 /* Convert from GSM time to frame number */
81 uint32_t gsm_gsmtime2fn(struct gsm_time *time);
83 void generate_backtrace();