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Diffstat (limited to 'drivers/net/hamradio/soundmodem/sm_hapn4800.c')
-rw-r--r--drivers/net/hamradio/soundmodem/sm_hapn4800.c560
1 files changed, 0 insertions, 560 deletions
diff --git a/drivers/net/hamradio/soundmodem/sm_hapn4800.c b/drivers/net/hamradio/soundmodem/sm_hapn4800.c
deleted file mode 100644
index f6babcd9d..000000000
--- a/drivers/net/hamradio/soundmodem/sm_hapn4800.c
+++ /dev/null
@@ -1,560 +0,0 @@
-/*****************************************************************************/
-
-/*
- * sm_hapn4800.c -- soundcard radio modem driver, 4800 baud HAPN modem
- *
- * Copyright (C) 1996 Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Please note that the GPL allows you to use the driver, NOT the radio.
- * In order to use the radio, you need a license from the communications
- * authority of your country.
- *
- *
- * This module implements a (hopefully) HAPN (Hamilton Area Packet
- * Network) compatible 4800 baud modem.
- * The HAPN modem uses kind of "duobinary signalling" (not really,
- * duobinary signalling gives ... 0 0 -1 0 1 0 0 ... at the sampling
- * instants, whereas HAPN signalling gives ... 0 0 -1 1 0 0 ..., see
- * Proakis, Digital Communications).
- * The code is untested. It is compatible with itself (i.e. it can decode
- * the packets it sent), but I could not test if it is compatible with
- * any "real" HAPN modem, since noone uses it in my region of the world.
- * Feedback therefore welcome.
- */
-
-#include "sm.h"
-#include "sm_tbl_hapn4800.h"
-
-/* --------------------------------------------------------------------- */
-
-struct demod_state_hapn48 {
- unsigned int shreg;
- unsigned int bit_pll;
- unsigned char last_bit;
- unsigned char last_bit2;
- unsigned int dcd_shreg;
- int dcd_sum0, dcd_sum1, dcd_sum2;
- unsigned int dcd_time;
- int lvlhi, lvllo;
-};
-
-struct mod_state_hapn48 {
- unsigned int shreg;
- unsigned char tx_bit;
- unsigned int tx_seq;
- const unsigned char *tbl;
-};
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_hapn4800_10_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
-{
- struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
-
- for (; buflen > 0; buflen--, buf++) {
- if (!st->tx_seq++) {
- if (st->shreg <= 1)
- st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
- st->tx_bit = ((st->tx_bit << 1) |
- (st->tx_bit & 1));
- st->tx_bit ^= (!(st->shreg & 1));
- st->shreg >>= 1;
- st->tbl = hapn48_txfilt_10 + (st->tx_bit & 0xf);
- }
- if (st->tx_seq >= 10)
- st->tx_seq = 0;
- *buf = *st->tbl;
- st->tbl += 0x10;
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_hapn4800_10_s16(struct sm_state *sm, short *buf, unsigned int buflen)
-{
- struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
-
- for (; buflen > 0; buflen--, buf++) {
- if (!st->tx_seq++) {
- if (st->shreg <= 1)
- st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
- st->tx_bit = ((st->tx_bit << 1) |
- (st->tx_bit & 1));
- st->tx_bit ^= (!(st->shreg & 1));
- st->shreg >>= 1;
- st->tbl = hapn48_txfilt_10 + (st->tx_bit & 0xf);
- }
- if (st->tx_seq >= 10)
- st->tx_seq = 0;
- *buf = ((*st->tbl)-0x80)<<8;
- st->tbl += 0x10;
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_hapn4800_8_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
-{
- struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
-
- for (; buflen > 0; buflen--, buf++) {
- if (!st->tx_seq++) {
- if (st->shreg <= 1)
- st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
- st->tx_bit = (st->tx_bit << 1) | (st->tx_bit & 1);
- st->tx_bit ^= !(st->shreg & 1);
- st->shreg >>= 1;
- st->tbl = hapn48_txfilt_8 + (st->tx_bit & 0xf);
- }
- if (st->tx_seq >= 8)
- st->tx_seq = 0;
- *buf = *st->tbl;
- st->tbl += 0x10;
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_hapn4800_8_s16(struct sm_state *sm, short *buf, unsigned int buflen)
-{
- struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
-
- for (; buflen > 0; buflen--, buf++) {
- if (!st->tx_seq++) {
- if (st->shreg <= 1)
- st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
- st->tx_bit = (st->tx_bit << 1) | (st->tx_bit & 1);
- st->tx_bit ^= !(st->shreg & 1);
- st->shreg >>= 1;
- st->tbl = hapn48_txfilt_8 + (st->tx_bit & 0xf);
- }
- if (st->tx_seq >= 8)
- st->tx_seq = 0;
- *buf = ((*st->tbl)-0x80)<<8;
- st->tbl += 0x10;
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_hapn4800_pm10_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
-{
- struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
-
- for (; buflen > 0; buflen--, buf++) {
- if (!st->tx_seq++) {
- if (st->shreg <= 1)
- st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
- st->tx_bit = ((st->tx_bit << 1) |
- (st->tx_bit & 1));
- st->tx_bit ^= (!(st->shreg & 1));
- st->shreg >>= 1;
- st->tbl = hapn48_txfilt_pm10 + (st->tx_bit & 0xf);
- }
- if (st->tx_seq >= 10)
- st->tx_seq = 0;
- *buf = *st->tbl;
- st->tbl += 0x10;
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_hapn4800_pm10_s16(struct sm_state *sm, short *buf, unsigned int buflen)
-{
- struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
-
- for (; buflen > 0; buflen--, buf++) {
- if (!st->tx_seq++) {
- if (st->shreg <= 1)
- st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
- st->tx_bit = ((st->tx_bit << 1) |
- (st->tx_bit & 1));
- st->tx_bit ^= (!(st->shreg & 1));
- st->shreg >>= 1;
- st->tbl = hapn48_txfilt_pm10 + (st->tx_bit & 0xf);
- }
- if (st->tx_seq >= 10)
- st->tx_seq = 0;
- *buf = ((*st->tbl)-0x80)<<8;
- st->tbl += 0x10;
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_hapn4800_pm8_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
-{
- struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
-
- for (; buflen > 0; buflen--, buf++) {
- if (!st->tx_seq++) {
- if (st->shreg <= 1)
- st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
- st->tx_bit = (st->tx_bit << 1) | (st->tx_bit & 1);
- st->tx_bit ^= !(st->shreg & 1);
- st->shreg >>= 1;
- st->tbl = hapn48_txfilt_pm8 + (st->tx_bit & 0xf);
- }
- if (st->tx_seq >= 8)
- st->tx_seq = 0;
- *buf = *st->tbl;
- st->tbl += 0x10;
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_hapn4800_pm8_s16(struct sm_state *sm, short *buf, unsigned int buflen)
-{
- struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
-
- for (; buflen > 0; buflen--, buf++) {
- if (!st->tx_seq++) {
- if (st->shreg <= 1)
- st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
- st->tx_bit = (st->tx_bit << 1) | (st->tx_bit & 1);
- st->tx_bit ^= !(st->shreg & 1);
- st->shreg >>= 1;
- st->tbl = hapn48_txfilt_pm8 + (st->tx_bit & 0xf);
- }
- if (st->tx_seq >= 8)
- st->tx_seq = 0;
- *buf = ((*st->tbl)-0x80)<<8;
- st->tbl += 0x10;
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_hapn4800_10_u8(struct sm_state *sm, const unsigned char *buf, unsigned int buflen)
-{
- struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
- static const int pll_corr[2] = { -0x800, 0x800 };
- int curst, cursync;
- int inv;
-
- for (; buflen > 0; buflen--, buf++) {
- inv = ((int)(buf[-2])-0x80) << 8;
- st->lvlhi = (st->lvlhi * 65309) >> 16; /* decay */
- st->lvllo = (st->lvllo * 65309) >> 16; /* decay */
- if (inv > st->lvlhi)
- st->lvlhi = inv;
- if (inv < st->lvllo)
- st->lvllo = inv;
- if (buflen & 1)
- st->dcd_shreg <<= 1;
- st->bit_pll += 0x199a;
- curst = cursync = 0;
- if (inv > st->lvlhi >> 1) {
- curst = 1;
- cursync = (buf[-2] > buf[-1] && buf[-2] > buf[-3] &&
- buf[-2] > buf[-0] && buf[-2] > buf[-4]);
- } else if (inv < st->lvllo >> 1) {
- curst = -1;
- cursync = (buf[-2] < buf[-1] && buf[-2] < buf[-3] &&
- buf[-2] < buf[-0] && buf[-2] < buf[-4]);
- }
- if (cursync) {
- st->dcd_shreg |= cursync;
- st->bit_pll += pll_corr[((st->bit_pll - 0x8000u) & 0xffffu) < 0x8ccdu];
- st->dcd_sum0 += 16 * hweight32(st->dcd_shreg & 0x18c6318c) -
- hweight32(st->dcd_shreg & 0xe739ce70);
- }
- hdlcdrv_channelbit(&sm->hdrv, cursync);
- if ((--st->dcd_time) <= 0) {
- hdlcdrv_setdcd(&sm->hdrv, (st->dcd_sum0 +
- st->dcd_sum1 +
- st->dcd_sum2) < 0);
- st->dcd_sum2 = st->dcd_sum1;
- st->dcd_sum1 = st->dcd_sum0;
- st->dcd_sum0 = 2; /* slight bias */
- st->dcd_time = 240;
- }
- if (st->bit_pll >= 0x10000) {
- st->bit_pll &= 0xffff;
- st->last_bit2 = st->last_bit;
- if (curst < 0)
- st->last_bit = 0;
- else if (curst > 0)
- st->last_bit = 1;
- st->shreg >>= 1;
- st->shreg |= ((st->last_bit ^ st->last_bit2 ^ 1) & 1) << 16;
- if (st->shreg & 1) {
- hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
- st->shreg = 0x10000;
- }
- diag_trigger(sm);
- }
- diag_add_one(sm, inv);
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_hapn4800_10_s16(struct sm_state *sm, const short *buf, unsigned int buflen)
-{
- struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
- static const int pll_corr[2] = { -0x800, 0x800 };
- int curst, cursync;
- int inv;
-
- for (; buflen > 0; buflen--, buf++) {
- inv = buf[-2];
- st->lvlhi = (st->lvlhi * 65309) >> 16; /* decay */
- st->lvllo = (st->lvllo * 65309) >> 16; /* decay */
- if (inv > st->lvlhi)
- st->lvlhi = inv;
- if (inv < st->lvllo)
- st->lvllo = inv;
- if (buflen & 1)
- st->dcd_shreg <<= 1;
- st->bit_pll += 0x199a;
- curst = cursync = 0;
- if (inv > st->lvlhi >> 1) {
- curst = 1;
- cursync = (buf[-2] > buf[-1] && buf[-2] > buf[-3] &&
- buf[-2] > buf[-0] && buf[-2] > buf[-4]);
- } else if (inv < st->lvllo >> 1) {
- curst = -1;
- cursync = (buf[-2] < buf[-1] && buf[-2] < buf[-3] &&
- buf[-2] < buf[-0] && buf[-2] < buf[-4]);
- }
- if (cursync) {
- st->dcd_shreg |= cursync;
- st->bit_pll += pll_corr[((st->bit_pll - 0x8000u) & 0xffffu) < 0x8ccdu];
- st->dcd_sum0 += 16 * hweight32(st->dcd_shreg & 0x18c6318c) -
- hweight32(st->dcd_shreg & 0xe739ce70);
- }
- hdlcdrv_channelbit(&sm->hdrv, cursync);
- if ((--st->dcd_time) <= 0) {
- hdlcdrv_setdcd(&sm->hdrv, (st->dcd_sum0 +
- st->dcd_sum1 +
- st->dcd_sum2) < 0);
- st->dcd_sum2 = st->dcd_sum1;
- st->dcd_sum1 = st->dcd_sum0;
- st->dcd_sum0 = 2; /* slight bias */
- st->dcd_time = 240;
- }
- if (st->bit_pll >= 0x10000) {
- st->bit_pll &= 0xffff;
- st->last_bit2 = st->last_bit;
- if (curst < 0)
- st->last_bit = 0;
- else if (curst > 0)
- st->last_bit = 1;
- st->shreg >>= 1;
- st->shreg |= ((st->last_bit ^ st->last_bit2 ^ 1) & 1) << 16;
- if (st->shreg & 1) {
- hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
- st->shreg = 0x10000;
- }
- diag_trigger(sm);
- }
- diag_add_one(sm, inv);
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_hapn4800_8_u8(struct sm_state *sm, const unsigned char *buf, unsigned int buflen)
-{
- struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
- static const int pll_corr[2] = { -0x800, 0x800 };
- int curst, cursync;
- int inv;
-
- for (; buflen > 0; buflen--, buf++) {
- inv = ((int)(buf[-2])-0x80) << 8;
- st->lvlhi = (st->lvlhi * 65309) >> 16; /* decay */
- st->lvllo = (st->lvllo * 65309) >> 16; /* decay */
- if (inv > st->lvlhi)
- st->lvlhi = inv;
- if (inv < st->lvllo)
- st->lvllo = inv;
- if (buflen & 1)
- st->dcd_shreg <<= 1;
- st->bit_pll += 0x2000;
- curst = cursync = 0;
- if (inv > st->lvlhi >> 1) {
- curst = 1;
- cursync = (buf[-2] > buf[-1] && buf[-2] > buf[-3] &&
- buf[-2] > buf[-0] && buf[-2] > buf[-4]);
- } else if (inv < st->lvllo >> 1) {
- curst = -1;
- cursync = (buf[-2] < buf[-1] && buf[-2] < buf[-3] &&
- buf[-2] < buf[-0] && buf[-2] < buf[-4]);
- }
- if (cursync) {
- st->dcd_shreg |= cursync;
- st->bit_pll += pll_corr[((st->bit_pll - 0x8000u) & 0xffffu) < 0x9000u];
- st->dcd_sum0 += 16 * hweight32(st->dcd_shreg & 0x44444444) -
- hweight32(st->dcd_shreg & 0xbbbbbbbb);
- }
- hdlcdrv_channelbit(&sm->hdrv, cursync);
- if ((--st->dcd_time) <= 0) {
- hdlcdrv_setdcd(&sm->hdrv, (st->dcd_sum0 +
- st->dcd_sum1 +
- st->dcd_sum2) < 0);
- st->dcd_sum2 = st->dcd_sum1;
- st->dcd_sum1 = st->dcd_sum0;
- st->dcd_sum0 = 2; /* slight bias */
- st->dcd_time = 240;
- }
- if (st->bit_pll >= 0x10000) {
- st->bit_pll &= 0xffff;
- st->last_bit2 = st->last_bit;
- if (curst < 0)
- st->last_bit = 0;
- else if (curst > 0)
- st->last_bit = 1;
- st->shreg >>= 1;
- st->shreg |= ((st->last_bit ^ st->last_bit2 ^ 1) & 1) << 16;
- if (st->shreg & 1) {
- hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
- st->shreg = 0x10000;
- }
- diag_trigger(sm);
- }
- diag_add_one(sm, inv);
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_hapn4800_8_s16(struct sm_state *sm, const short *buf, unsigned int buflen)
-{
- struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
- static const int pll_corr[2] = { -0x800, 0x800 };
- int curst, cursync;
- int inv;
-
- for (; buflen > 0; buflen--, buf++) {
- inv = buf[-2];
- st->lvlhi = (st->lvlhi * 65309) >> 16; /* decay */
- st->lvllo = (st->lvllo * 65309) >> 16; /* decay */
- if (inv > st->lvlhi)
- st->lvlhi = inv;
- if (inv < st->lvllo)
- st->lvllo = inv;
- if (buflen & 1)
- st->dcd_shreg <<= 1;
- st->bit_pll += 0x2000;
- curst = cursync = 0;
- if (inv > st->lvlhi >> 1) {
- curst = 1;
- cursync = (buf[-2] > buf[-1] && buf[-2] > buf[-3] &&
- buf[-2] > buf[-0] && buf[-2] > buf[-4]);
- } else if (inv < st->lvllo >> 1) {
- curst = -1;
- cursync = (buf[-2] < buf[-1] && buf[-2] < buf[-3] &&
- buf[-2] < buf[-0] && buf[-2] < buf[-4]);
- }
- if (cursync) {
- st->dcd_shreg |= cursync;
- st->bit_pll += pll_corr[((st->bit_pll - 0x8000u) & 0xffffu) < 0x9000u];
- st->dcd_sum0 += 16 * hweight32(st->dcd_shreg & 0x44444444) -
- hweight32(st->dcd_shreg & 0xbbbbbbbb);
- }
- hdlcdrv_channelbit(&sm->hdrv, cursync);
- if ((--st->dcd_time) <= 0) {
- hdlcdrv_setdcd(&sm->hdrv, (st->dcd_sum0 +
- st->dcd_sum1 +
- st->dcd_sum2) < 0);
- st->dcd_sum2 = st->dcd_sum1;
- st->dcd_sum1 = st->dcd_sum0;
- st->dcd_sum0 = 2; /* slight bias */
- st->dcd_time = 240;
- }
- if (st->bit_pll >= 0x10000) {
- st->bit_pll &= 0xffff;
- st->last_bit2 = st->last_bit;
- if (curst < 0)
- st->last_bit = 0;
- else if (curst > 0)
- st->last_bit = 1;
- st->shreg >>= 1;
- st->shreg |= ((st->last_bit ^ st->last_bit2 ^ 1) & 1) << 16;
- if (st->shreg & 1) {
- hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
- st->shreg = 0x10000;
- }
- diag_trigger(sm);
- }
- diag_add_one(sm, inv);
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demod_init_hapn4800(struct sm_state *sm)
-{
- struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
-
- st->dcd_time = 120;
- st->dcd_sum0 = 2;
-}
-
-/* --------------------------------------------------------------------- */
-
-const struct modem_tx_info sm_hapn4800_8_tx = {
- "hapn4800", sizeof(struct mod_state_hapn48), 38400, 4800,
- modulator_hapn4800_8_u8, modulator_hapn4800_8_s16, NULL
-};
-
-const struct modem_rx_info sm_hapn4800_8_rx = {
- "hapn4800", sizeof(struct demod_state_hapn48), 38400, 4800, 5, 8,
- demodulator_hapn4800_8_u8, demodulator_hapn4800_8_s16, demod_init_hapn4800
-};
-
-/* --------------------------------------------------------------------- */
-
-const struct modem_tx_info sm_hapn4800_10_tx = {
- "hapn4800", sizeof(struct mod_state_hapn48), 48000, 4800,
- modulator_hapn4800_10_u8, modulator_hapn4800_10_s16, NULL
-};
-
-const struct modem_rx_info sm_hapn4800_10_rx = {
- "hapn4800", sizeof(struct demod_state_hapn48), 48000, 4800, 5, 10,
- demodulator_hapn4800_10_u8, demodulator_hapn4800_10_s16, demod_init_hapn4800
-};
-
-/* --------------------------------------------------------------------- */
-
-const struct modem_tx_info sm_hapn4800_pm8_tx = {
- "hapn4800pm", sizeof(struct mod_state_hapn48), 38400, 4800,
- modulator_hapn4800_pm8_u8, modulator_hapn4800_pm8_s16, NULL
-};
-
-const struct modem_rx_info sm_hapn4800_pm8_rx = {
- "hapn4800pm", sizeof(struct demod_state_hapn48), 38400, 4800, 5, 8,
- demodulator_hapn4800_8_u8, demodulator_hapn4800_8_s16, demod_init_hapn4800
-};
-
-/* --------------------------------------------------------------------- */
-
-const struct modem_tx_info sm_hapn4800_pm10_tx = {
- "hapn4800pm", sizeof(struct mod_state_hapn48), 48000, 4800,
- modulator_hapn4800_pm10_u8, modulator_hapn4800_pm10_s16, NULL
-};
-
-const struct modem_rx_info sm_hapn4800_pm10_rx = {
- "hapn4800pm", sizeof(struct demod_state_hapn48), 48000, 4800, 5, 10,
- demodulator_hapn4800_10_u8, demodulator_hapn4800_10_s16, demod_init_hapn4800
-};
-
-/* --------------------------------------------------------------------- */
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-18 22:35:22 +0000