patch-2.1.71 linux/drivers/net/soundmodem/sm_fsk9600.c

• Lines: 392
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.70/linux/drivers/net/soundmodem/sm_fsk9600.c
• Orig date: Mon Jun 16 16:35:56 1997

diff -u --recursive --new-file v2.1.70/linux/drivers/net/soundmodem/sm_fsk9600.c linux/drivers/net/soundmodem/sm_fsk9600.c
@@ -1,391 +0,0 @@
-/*****************************************************************************/
-
-/*
- *	sm_fsk9600.c  --  soundcard radio modem driver, 
- *                        9600 baud G3RUH compatible FSK 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.
- *
- */
-
-#include "sm.h"
-#include "sm_tbl_fsk9600.h"
-
-/* --------------------------------------------------------------------- */
-
-struct demod_state_fsk96 {
-	unsigned int shreg;
-	unsigned long descram;
-	unsigned int bit_pll;
-	unsigned char last_sample;
-	unsigned int dcd_shreg;
-	int dcd_sum0, dcd_sum1, dcd_sum2;
-	unsigned int dcd_time;
-};
-
-struct mod_state_fsk96 {
-	unsigned int shreg;
-	unsigned long scram;
-	unsigned char tx_bit;
-	unsigned char *txtbl;
-	unsigned int txphase;
-};
-
-/* --------------------------------------------------------------------- */
-
-#define DESCRAM_TAP1 0x20000
-#define DESCRAM_TAP2 0x01000
-#define DESCRAM_TAP3 0x00001
-
-#define DESCRAM_TAPSH1 17
-#define DESCRAM_TAPSH2 12
-#define DESCRAM_TAPSH3 0
-
-#define SCRAM_TAP1 0x20000 /* X^17 */
-#define SCRAM_TAPN 0x00021 /* X^0+X^5 */
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_9600_4_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
-{
-	struct mod_state_fsk96 *st = (struct mod_state_fsk96 *)(&sm->m);
-
-	for (; buflen > 0; buflen--) {
-		if (!st->txphase++) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->scram = (st->scram << 1) | (st->scram & 1);
-			st->scram ^= !(st->shreg & 1);
-			st->shreg >>= 1;
-			if (st->scram & (SCRAM_TAP1 << 1))
-				st->scram ^= SCRAM_TAPN << 1;
-			st->tx_bit = (st->tx_bit << 1) | (!!(st->scram & (SCRAM_TAP1 << 2)));
-			st->txtbl = fsk96_txfilt_4 + (st->tx_bit & 0xff);
-		}
-		if (st->txphase >= 4)
-			st->txphase = 0;
-		*buf++ = *st->txtbl;
-		st->txtbl += 0x100;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_9600_4_s16(struct sm_state *sm, short *buf, unsigned int buflen)
-{
-	struct mod_state_fsk96 *st = (struct mod_state_fsk96 *)(&sm->m);
-
-	for (; buflen > 0; buflen--) {
-		if (!st->txphase++) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->scram = (st->scram << 1) | (st->scram & 1);
-			st->scram ^= !(st->shreg & 1);
-			st->shreg >>= 1;
-			if (st->scram & (SCRAM_TAP1 << 1))
-				st->scram ^= SCRAM_TAPN << 1;
-			st->tx_bit = (st->tx_bit << 1) | (!!(st->scram & (SCRAM_TAP1 << 2)));
-			st->txtbl = fsk96_txfilt_4 + (st->tx_bit & 0xff);
-		}
-		if (st->txphase >= 4)
-			st->txphase = 0;
-		*buf++ = ((*st->txtbl)-0x80) << 8;
-		st->txtbl += 0x100;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_9600_4_u8(struct sm_state *sm, const unsigned char *buf, unsigned int buflen)
-{
-	struct demod_state_fsk96 *st = (struct demod_state_fsk96 *)(&sm->d);
-	static const int pll_corr[2] = { -0x1000, 0x1000 };
-	unsigned char curbit;
-	unsigned int descx;
-
-	for (; buflen > 0; buflen--, buf++) {
-		st->dcd_shreg <<= 1;
-		st->bit_pll += 0x4000;
-		curbit = (*buf >= 0x80);
-		if (st->last_sample ^ curbit) {
-			st->dcd_shreg |= 1;
-			st->bit_pll += pll_corr[st->bit_pll < 0xa000];
-			st->dcd_sum0 += 8 * hweight8(st->dcd_shreg & 0x0c) - 
-				!!(st->dcd_shreg & 0x10);
-		}
-		st->last_sample = curbit;
-		hdlcdrv_channelbit(&sm->hdrv, st->last_sample);
-		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->descram = (st->descram << 1) | curbit;
-			descx = st->descram ^ (st->descram >> 1);
-			descx ^= ((descx >> DESCRAM_TAPSH1) ^
-				  (descx >> DESCRAM_TAPSH2));
-			st->shreg >>= 1;
-			st->shreg |= (!(descx & 1)) << 16;
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-			diag_trigger(sm);
-		}
-		diag_add_one(sm, ((short)(*buf - 0x80)) << 8);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_9600_4_s16(struct sm_state *sm, const short *buf, unsigned int buflen)
-{
-	struct demod_state_fsk96 *st = (struct demod_state_fsk96 *)(&sm->d);
-	static const int pll_corr[2] = { -0x1000, 0x1000 };
-	unsigned char curbit;
-	unsigned int descx;
-
-	for (; buflen > 0; buflen--, buf++) {
-		st->dcd_shreg <<= 1;
-		st->bit_pll += 0x4000;
-		curbit = (*buf >= 0);
-		if (st->last_sample ^ curbit) {
-			st->dcd_shreg |= 1;
-			st->bit_pll += pll_corr[st->bit_pll < 0xa000];
-			st->dcd_sum0 += 8 * hweight8(st->dcd_shreg & 0x0c) - 
-				!!(st->dcd_shreg & 0x10);
-		}
-		st->last_sample = curbit;
-		hdlcdrv_channelbit(&sm->hdrv, st->last_sample);
-		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->descram = (st->descram << 1) | curbit;
-			descx = st->descram ^ (st->descram >> 1);
-			descx ^= ((descx >> DESCRAM_TAPSH1) ^
-				  (descx >> DESCRAM_TAPSH2));
-			st->shreg >>= 1;
-			st->shreg |= (!(descx & 1)) << 16;
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-			diag_trigger(sm);
-		}
-		diag_add_one(sm, *buf);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_9600_5_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
-{
-	struct mod_state_fsk96 *st = (struct mod_state_fsk96 *)(&sm->m);
-
-	for (; buflen > 0; buflen--) {
-		if (!st->txphase++) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->scram = (st->scram << 1) | (st->scram & 1);
-			st->scram ^= !(st->shreg & 1);
-			st->shreg >>= 1;
-			if (st->scram & (SCRAM_TAP1 << 1))
-				st->scram ^= SCRAM_TAPN << 1;
-			st->tx_bit = (st->tx_bit << 1) | (!!(st->scram & (SCRAM_TAP1 << 2)));
-			st->txtbl = fsk96_txfilt_5 + (st->tx_bit & 0xff);
-		}
-		if (st->txphase >= 5)
-			st->txphase = 0;
-		*buf++ = *st->txtbl;
-		st->txtbl += 0x100;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_9600_5_s16(struct sm_state *sm, short *buf, unsigned int buflen)
-{
-	struct mod_state_fsk96 *st = (struct mod_state_fsk96 *)(&sm->m);
-
-	for (; buflen > 0; buflen--) {
-		if (!st->txphase++) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->scram = (st->scram << 1) | (st->scram & 1);
-			st->scram ^= !(st->shreg & 1);
-			st->shreg >>= 1;
-			if (st->scram & (SCRAM_TAP1 << 1))
-				st->scram ^= SCRAM_TAPN << 1;
-			st->tx_bit = (st->tx_bit << 1) | (!!(st->scram & (SCRAM_TAP1 << 2)));
-			st->txtbl = fsk96_txfilt_5 + (st->tx_bit & 0xff);
-		}
-		if (st->txphase >= 5)
-			st->txphase = 0;
-		*buf++ = ((*st->txtbl)-0x80)<<8;
-		st->txtbl += 0x100;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_9600_5_u8(struct sm_state *sm, const unsigned char *buf, unsigned int buflen)
-{
-	struct demod_state_fsk96 *st = (struct demod_state_fsk96 *)(&sm->d);
-	static const int pll_corr[2] = { -0x1000, 0x1000 };
-	unsigned char curbit;
-	unsigned int descx;
-
-	for (; buflen > 0; buflen--, buf++) {
-		st->dcd_shreg <<= 1;
-		st->bit_pll += 0x3333;
-		curbit = (*buf >= 0x80);
-		if (st->last_sample ^ curbit) {
-			st->dcd_shreg |= 1;
-			st->bit_pll += pll_corr[st->bit_pll < 0x9999];
-			st->dcd_sum0 += 16 * hweight8(st->dcd_shreg & 0x0c) - 
-				hweight8(st->dcd_shreg & 0x70);
-		}
-		st->last_sample = curbit;
-		hdlcdrv_channelbit(&sm->hdrv, st->last_sample);
-		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->descram = (st->descram << 1) | curbit;
-			descx = st->descram ^ (st->descram >> 1);
-			descx ^= ((descx >> DESCRAM_TAPSH1) ^
-				  (descx >> DESCRAM_TAPSH2));
-			st->shreg >>= 1;
-			st->shreg |= (!(descx & 1)) << 16;
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-			diag_trigger(sm);
-		}
-		diag_add_one(sm, ((short)(*buf - 0x80)) << 8);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_9600_5_s16(struct sm_state *sm, const short *buf, unsigned int buflen)
-{
-	struct demod_state_fsk96 *st = (struct demod_state_fsk96 *)(&sm->d);
-	static const int pll_corr[2] = { -0x1000, 0x1000 };
-	unsigned char curbit;
-	unsigned int descx;
-
-	for (; buflen > 0; buflen--, buf++) {
-		st->dcd_shreg <<= 1;
-		st->bit_pll += 0x3333;
-		curbit = (*buf >= 0);
-		if (st->last_sample ^ curbit) {
-			st->dcd_shreg |= 1;
-			st->bit_pll += pll_corr[st->bit_pll < 0x9999];
-			st->dcd_sum0 += 16 * hweight8(st->dcd_shreg & 0x0c) - 
-				hweight8(st->dcd_shreg & 0x70);
-		}
-		st->last_sample = curbit;
-		hdlcdrv_channelbit(&sm->hdrv, st->last_sample);
-		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->descram = (st->descram << 1) | curbit;
-			descx = st->descram ^ (st->descram >> 1);
-			descx ^= ((descx >> DESCRAM_TAPSH1) ^
-				  (descx >> DESCRAM_TAPSH2));
-			st->shreg >>= 1;
-			st->shreg |= (!(descx & 1)) << 16;
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-			diag_trigger(sm);
-		}
-		diag_add_one(sm, *buf);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demod_init_9600(struct sm_state *sm)
-{
-	struct demod_state_fsk96 *st = (struct demod_state_fsk96 *)(&sm->d);
-
-	st->dcd_time = 240;
-	st->dcd_sum0 = 2;	
-}
-
-/* --------------------------------------------------------------------- */
-
-const struct modem_tx_info sm_fsk9600_4_tx = {
-	"fsk9600", sizeof(struct mod_state_fsk96), 38400, 9600,
-	modulator_9600_4_u8, modulator_9600_4_s16, NULL
-};
-
-const struct modem_rx_info sm_fsk9600_4_rx = {
-	"fsk9600", sizeof(struct demod_state_fsk96), 38400, 9600, 1, 4,
-	demodulator_9600_4_u8, demodulator_9600_4_s16, demod_init_9600
-};
-
-/* --------------------------------------------------------------------- */
-
-const struct modem_tx_info sm_fsk9600_5_tx = {
-	"fsk9600", sizeof(struct mod_state_fsk96), 48000, 9600,
-	modulator_9600_5_u8, modulator_9600_5_s16, NULL
-};
-
-const struct modem_rx_info sm_fsk9600_5_rx = {
-	"fsk9600", sizeof(struct demod_state_fsk96), 48000, 9600, 1, 5, 
-	demodulator_9600_5_u8, demodulator_9600_5_s16, demod_init_9600
-};
-
-/* --------------------------------------------------------------------- */