| /* |
| * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu> |
| * (C) 2016 by Tom Tsou <tom.tsou@ettus.com> |
| * |
| * All Rights Reserved |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| * |
| * 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. |
| */ |
| |
| #include <stdint.h> |
| |
| #include <osmocom/core/crcgen.h> |
| #include <osmocom/coding/gsm0503_parity.h> |
| |
| /*! \addtogroup parity |
| * @{ |
| * |
| * GSM TS 05.03 parity |
| * |
| * This module contains parity/crc code definitions for the various |
| * parity/crc schemes as defined in 3GPP TS 05.03 / 45.003 |
| * |
| * \file gsm0503_parity.c */ |
| |
| /*! GSM (SACCH) parity (FIRE code) |
| * |
| * g(x) = (x^23 + 1)(x^17 + x^3 + 1) |
| * = x^40 + x^26 + x^23 + x^17 + x^3 + a1 |
| */ |
| const struct osmo_crc64gen_code gsm0503_fire_crc40 = { |
| .bits = 40, |
| .poly = 0x0004820009ULL, |
| .init = 0x0000000000ULL, |
| .remainder = 0xffffffffffULL, |
| }; |
| |
| /*! GSM PDTCH CS-2, CS-3, CS-4 parity |
| * |
| * g(x) = x^16 + x^12 + x^5 + 1 |
| */ |
| const struct osmo_crc16gen_code gsm0503_cs234_crc16 = { |
| .bits = 16, |
| .poly = 0x1021, |
| .init = 0x0000, |
| .remainder = 0xffff, |
| }; |
| |
| /*! EDGE MCS header parity |
| * |
| */ |
| const struct osmo_crc8gen_code gsm0503_mcs_crc8_hdr = { |
| .bits = 8, |
| .poly = 0x49, |
| .init = 0x00, |
| .remainder = 0xff, |
| }; |
| |
| /*! EDGE MCS data parity |
| * |
| */ |
| const struct osmo_crc16gen_code gsm0503_mcs_crc12 = { |
| .bits = 12, |
| .poly = 0x0d31, |
| .init = 0x0000, |
| .remainder = 0x0fff, |
| }; |
| |
| /*! GSM RACH parity |
| * |
| * g(x) = x^6 + x^5 + x^3 + x^2 + x^1 + 1 |
| */ |
| const struct osmo_crc8gen_code gsm0503_rach_crc6 = { |
| .bits = 6, |
| .poly = 0x2f, |
| .init = 0x00, |
| .remainder = 0x3f, |
| }; |
| |
| /*! GSM SCH parity |
| * |
| * g(x) = x^10 + x^8 + x^6 + x^5 + x^4 + x^2 + 1 |
| */ |
| const struct osmo_crc16gen_code gsm0503_sch_crc10 = { |
| .bits = 10, |
| .poly = 0x175, |
| .init = 0x000, |
| .remainder = 0x3ff, |
| }; |
| |
| /*! GSM TCH FR/HR/EFR parity |
| * |
| * g(x) = x^3 + x + 1 |
| */ |
| const struct osmo_crc8gen_code gsm0503_tch_fr_crc3 = { |
| .bits = 3, |
| .poly = 0x3, |
| .init = 0x0, |
| .remainder = 0x7, |
| }; |
| |
| /*! GSM TCH EFR parity |
| * |
| * g(x) = x^8 + x^4 + x^3 + x^2 + 1 |
| */ |
| const struct osmo_crc8gen_code gsm0503_tch_efr_crc8 = { |
| .bits = 8, |
| .poly = 0x1d, |
| .init = 0x00, |
| .remainder = 0x00, |
| }; |
| |
| /*! GSM AMR parity |
| * |
| * g(x) = x^6 + x^5 + x^3 + x^2 + x^1 + 1 |
| */ |
| const struct osmo_crc8gen_code gsm0503_amr_crc6 = { |
| .bits = 6, |
| .poly = 0x2f, |
| .init = 0x00, |
| .remainder = 0x3f, |
| }; |
| |
| /*! @} */ |