| /* GSM utility functions, e.g. coding and decoding */ |
| /* |
| * (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de> |
| * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
| * (C) 2009-2010 by Harald Welte <laforge@gnumonks.org> |
| * |
| * 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 GSM_UTILS_H |
| #define GSM_UTILS_H |
| |
| #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, |
| GSM_BAND_1800 = 4, |
| GSM_BAND_1900 = 8, |
| GSM_BAND_450 = 0x10, |
| GSM_BAND_480 = 0x20, |
| GSM_BAND_750 = 0x40, |
| GSM_BAND_810 = 0x80, |
| }; |
| |
| const char *gsm_band_name(enum gsm_band band); |
| enum gsm_band gsm_band_parse(const char *mhz); |
| |
| int gsm_7bit_decode(char *decoded, const uint8_t *user_data, uint8_t length); |
| int gsm_7bit_encode(uint8_t *result, const char *data); |
| |
| int ms_pwr_ctl_lvl(enum gsm_band band, unsigned int dbm); |
| int ms_pwr_dbm(enum gsm_band band, uint8_t lvl); |
| |
| /* According to TS 08.05 Chapter 8.1.4 */ |
| int rxlev2dbm(uint8_t rxlev); |
| uint8_t dbm2rxlev(int dbm); |
| |
| /* According to GSM 04.08 Chapter 10.5.2.29 */ |
| static inline int rach_max_trans_val2raw(int val) { return (val >> 1) & 3; } |
| static inline int rach_max_trans_raw2val(int raw) { |
| const int tbl[4] = { 1, 2, 4, 7 }; |
| 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 |