[PATCH] kill soundmodem

It was dead before 2.4 (replaced by better userspace versions)

drivers/net/hamradio/Kconfig

@@ -185,120 +185,6 @@ config BAYCOM_EPP
 	  say M here and read <file:Documentation/modules.txt>.  This is
 	  recommended.  The module will be called baycom_par.o.
 
-config SOUNDMODEM
-	tristate "Soundcard modem driver"
-	depends on PARPORT && AX25
-	---help---
-	  This experimental driver allows a standard Sound Blaster or
-	  WindowsSoundSystem compatible sound card to be used as a packet
-	  radio modem (NOT as a telephone modem!), to send digital traffic
-	  over amateur radio.
-
-	  To configure the driver, use the sethdlc, smdiag and smmixer
-	  utilities available in the standard ax25 utilities package. For
-	  information on how to key the transmitter, see
-	  <http://www.ife.ee.ethz.ch/~sailer/pcf/ptt_circ/ptt.html> and
-	  <file:Documentation/networking/soundmodem.txt>.
-
-	  If you want to compile this driver as a module ( = code which can be
-	  inserted in and removed from the running kernel whenever you want),
-	  say M here and read <file:Documentation/modules.txt>.  This is
-	  recommended.  The module will be called soundmodem.o.
-
-config SOUNDMODEM_SBC
-	bool "soundmodem support for Soundblaster and compatible cards"
-	depends on SOUNDMODEM
-	help
-	  This option enables the soundmodem driver to use Sound Blaster and
-	  compatible cards. If you have a dual mode card (i.e. a WSS cards
-	  with a Sound Blaster emulation) you should say N here and Y to
-	  "Sound card modem support for WSS and Crystal cards", below, because
-	  this usually results in better performance. This option also
-	  supports SB16/32/64 in full-duplex mode.
-
-config SOUNDMODEM_WSS
-	bool "soundmodem support for WSS and Crystal cards"
-	depends on SOUNDMODEM
-	help
-	  This option enables the soundmodem driver to use WindowsSoundSystem
-	  compatible cards. These cards feature a codec chip from either
-	  Analog Devices (such as AD1848, AD1845, AD1812) or Crystal
-	  Semiconductors (such as CS4248, CS423x). This option also supports
-	  the WSS full-duplex operation which currently works with Crystal
-	  CS423x chips. If you don't need full-duplex operation, do not enable
-	  it to save performance.
-
-config SOUNDMODEM_AFSK1200
-	bool "soundmodem support for 1200 baud AFSK modulation"
-	depends on SOUNDMODEM
-	help
-	  This option enables the soundmodem driver 1200 baud AFSK modem,
-	  compatible to popular modems using TCM3105 or AM7911. The
-	  demodulator requires about 12% of the CPU power of a Pentium 75 CPU
-	  per channel.
-
-config SOUNDMODEM_AFSK2400_7
-	bool "soundmodem support for 2400 baud AFSK modulation (7.3728MHz crystal)"
-	depends on SOUNDMODEM
-	help
-	  This option enables the soundmodem driver 2400 baud AFSK modem,
-	  compatible to TCM3105 modems (over-)clocked with a 7.3728MHz
-	  crystal. Note that the availability of this driver does _not_ imply
-	  that I recommend building such links. It is only here since users
-	  especially in eastern Europe have asked me to do so. In fact this
-	  modulation scheme has many disadvantages, mainly its incompatibility
-	  with many transceiver designs and the fact that the TCM3105 (if
-	  used) is operated widely outside its specifications.
-
-config SOUNDMODEM_AFSK2400_8
-	bool "soundmodem support for 2400 baud AFSK modulation (8MHz crystal)"
-	depends on SOUNDMODEM
-	help
-	  This option enables the soundmodem driver 2400 baud AFSK modem,
-	  compatible to TCM3105 modems (over-)clocked with an 8MHz crystal.
-	  Note that the availability of this driver does _not_ imply that I
-	  recommend building such links. It is only here since users
-	  especially in eastern Europe have asked me to do so. In fact this
-	  modulation scheme has many disadvantages, mainly its incompatibility
-	  with many transceiver designs and the fact that the TCM3105 (if
-	  used) is operated widely outside its specifications.
-
-config SOUNDMODEM_AFSK2666
-	bool "soundmodem support for 2666 baud AFSK modulation"
-	depends on SOUNDMODEM
-	help
-	  This option enables the soundmodem driver 2666 baud AFSK modem.
-	  This modem is experimental, and not compatible to anything
-	  else I know of.
-
-config SOUNDMODEM_HAPN4800
-	bool "soundmodem support for 4800 baud HAPN-1 modulation"
-	depends on SOUNDMODEM
-	help
-	  This option enables the soundmodem driver 4800 baud HAPN-1
-	  compatible modem. This modulation seems to be widely used 'down
-	  under' and in the Netherlands. Here, nobody uses it, so I could not
-	  test if it works. It is compatible to itself, however :-)
-
-config SOUNDMODEM_PSK4800
-	bool "soundmodem support for 4800 baud PSK modulation"
-	depends on SOUNDMODEM
-	help
-	  This option enables the soundmodem driver 4800 baud 8PSK modem.
-	  This modem is experimental, and not compatible to anything
-	  else I know of.
-
-config SOUNDMODEM_FSK9600
-	bool "soundmodem support for 9600 baud FSK G3RUH modulation"
-	depends on SOUNDMODEM
-	help
-	  This option enables the soundmodem driver 9600 baud FSK modem,
-	  compatible to the G3RUH standard. The demodulator requires about 4%
-	  of the CPU power of a Pentium 75 CPU per channel. You can say Y to
-	  both 1200 baud AFSK and 9600 baud FSK if you want (but obviously you
-	  can only use one protocol at a time, depending on what the other end
-	  can understand).
-
 config YAM
 	tristate "YAM driver for AX.25"
 	depends on AX25

drivers/net/hamradio/soundmodem/Makefile

-#
-# Makefile for the soundmodem device driver.
-#
-
-obj-$(CONFIG_SOUNDMODEM) += soundmodem.o
-
-soundmodem-y					:= sm.o
-soundmodem-$(CONFIG_SOUNDMODEM_SBC)		+= sm_sbc.o
-soundmodem-$(CONFIG_SOUNDMODEM_WSS)		+= sm_wss.o
-soundmodem-$(CONFIG_SOUNDMODEM_AFSK1200)	+= sm_afsk1200.o
-soundmodem-$(CONFIG_SOUNDMODEM_AFSK2400_7)	+= sm_afsk2400_7.o
-soundmodem-$(CONFIG_SOUNDMODEM_AFSK2400_8)	+= sm_afsk2400_8.o
-soundmodem-$(CONFIG_SOUNDMODEM_AFSK2666)	+= sm_afsk2666.o
-soundmodem-$(CONFIG_SOUNDMODEM_HAPN4800)	+= sm_hapn4800.o
-soundmodem-$(CONFIG_SOUNDMODEM_PSK4800)		+= sm_psk4800.o
-soundmodem-$(CONFIG_SOUNDMODEM_FSK9600)		+= sm_fsk9600.o
-soundmodem-objs					:= $(soundmodem-y)
-
-host-progs := gentbl
-HOST_LOADLIBES := -lm
-
-# Files generated that shall be removed upon make clean
-clean-files  :=	sm_tbl_afsk1200.h   sm_tbl_afsk2400_7.h	\
-		sm_tbl_afsk2400_8.h sm_tbl_afsk2666.h	\
-		sm_tbl_psk4800.h    sm_tbl_hapn4800.h	\
-		sm_tbl_fsk9600.h
-
-include $(TOPDIR)/Rules.make
-
-# Dependencies on generates files need to be listed explicitly
-
-$(obj)/sm_afsk1200.o:   $(obj)/sm_tbl_afsk1200.h
-$(obj)/sm_afsk2400_7.o: $(obj)/sm_tbl_afsk2400_7.h
-$(obj)/sm_afsk2400_8.o: $(obj)/sm_tbl_afsk2400_8.h
-$(obj)/sm_afsk2666.o:   $(obj)/sm_tbl_afsk2666.h
-$(obj)/sm_psk4800.o:    $(obj)/sm_tbl_psk4800.h
-$(obj)/sm_hapn4800.o:   $(obj)/sm_tbl_hapn4800.h
-$(obj)/sm_fsk9600.o:    $(obj)/sm_tbl_fsk9600.h
-
-$(obj)/sm_tbl_%: $(obj)/gentbl
-	cd $(obj) && ./gentbl
-

drivers/net/hamradio/soundmodem/sm_afsk1200.c

-/*****************************************************************************/
-
-/*
- *	sm_afsk1200.c  -- soundcard radio modem driver, 1200 baud AFSK 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_afsk1200.h"
-
-/* --------------------------------------------------------------------- */
-
-struct demod_state_afsk12 {
-	unsigned int shreg;
-	unsigned int bit_pll;
-	unsigned char last_sample;
-	unsigned int dcd_shreg;
-	int dcd_sum0, dcd_sum1, dcd_sum2;
-	unsigned int dcd_time;
-	unsigned char last_rxbit;
-};
-
-struct mod_state_afsk12 {
-	unsigned int shreg;
-	unsigned char tx_bit;
-	unsigned int bit_pll;
-	unsigned int dds_inc;
-	unsigned int txphase;
-};
-
-/* --------------------------------------------------------------------- */
-
-static const int dds_inc[2] = { 
-	AFSK12_TX_FREQ_LO*0x10000/AFSK12_SAMPLE_RATE,
-	AFSK12_TX_FREQ_HI*0x10000/AFSK12_SAMPLE_RATE 
-};
-
-static void modulator_1200_u8(struct sm_state *sm, unsigned char *buf, 
-			      unsigned int buflen)
-{
-	struct mod_state_afsk12 *st = (struct mod_state_afsk12 *)(&sm->m);
-
-	for (; buflen > 0; buflen--) {
-		if (!((st->txphase++) & 7)) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->tx_bit = (st->tx_bit ^ (!(st->shreg & 1))) & 1;
-			st->shreg >>= 1;
-		}
-		st->dds_inc = dds_inc[st->tx_bit & 1];
-		*buf++ = OFFSCOS(st->bit_pll);
-		st->bit_pll += st->dds_inc;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_1200_s16(struct sm_state *sm, short *buf, unsigned int buflen)
-{
-	struct mod_state_afsk12 *st = (struct mod_state_afsk12 *)(&sm->m);
-
-	for (; buflen > 0; buflen--) {
-		if (!((st->txphase++) & 7)) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->tx_bit = (st->tx_bit ^ (!(st->shreg & 1))) & 1;
-			st->shreg >>= 1;
-		}
-		st->dds_inc = dds_inc[st->tx_bit & 1];
-		*buf++ = COS(st->bit_pll);
-		st->bit_pll += st->dds_inc;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static __inline__ int convolution8_u8(const unsigned char *st, const int *coeff, int csum)
-{
-	int sum = -0x80 * csum;
-	
-	sum += (st[0] * coeff[0]);
-	sum += (st[-1] * coeff[1]);
-	sum += (st[-2] * coeff[2]);
-	sum += (st[-3] * coeff[3]);
-	sum += (st[-4] * coeff[4]);
-	sum += (st[-5] * coeff[5]);
-	sum += (st[-6] * coeff[6]);
-	sum += (st[-7] * coeff[7]);
-
-	sum >>= 7;
-	return sum * sum;
-}
-
-static __inline__ int convolution8_s16(const short *st, const int *coeff, int csum)
-{
-	int sum = 0;
-	
-	sum += (st[0] * coeff[0]);
-	sum += (st[-1] * coeff[1]);
-	sum += (st[-2] * coeff[2]);
-	sum += (st[-3] * coeff[3]);
-	sum += (st[-4] * coeff[4]);
-	sum += (st[-5] * coeff[5]);
-	sum += (st[-6] * coeff[6]);
-	sum += (st[-7] * coeff[7]);
-
-	sum >>= 15;
-	return sum * sum;
-}
-
-static __inline__ int do_filter_1200_u8(const unsigned char *buf)
-{
-	int sum = convolution8_u8(buf, afsk12_tx_lo_i, SUM_AFSK12_TX_LO_I);
-	sum += convolution8_u8(buf, afsk12_tx_lo_q, SUM_AFSK12_TX_LO_Q);
-	sum -= convolution8_u8(buf, afsk12_tx_hi_i, SUM_AFSK12_TX_HI_I);
-	sum -= convolution8_u8(buf, afsk12_tx_hi_q, SUM_AFSK12_TX_HI_Q);
-	return sum;
-}
-
-static __inline__ int do_filter_1200_s16(const short *buf)
-{
-	int sum = convolution8_s16(buf, afsk12_tx_lo_i, SUM_AFSK12_TX_LO_I);
-	sum += convolution8_s16(buf, afsk12_tx_lo_q, SUM_AFSK12_TX_LO_Q);
-	sum -= convolution8_s16(buf, afsk12_tx_hi_i, SUM_AFSK12_TX_HI_I);
-	sum -= convolution8_s16(buf, afsk12_tx_hi_q, SUM_AFSK12_TX_HI_Q);
-	return sum;
-}
-
-/* --------------------------------------------------------------------- */
-
-static const int pll_corr[2] = { -0x1000, 0x1000 };
-
-static void demodulator_1200_u8(struct sm_state *sm, const unsigned char *buf, unsigned int buflen)
-{
-	struct demod_state_afsk12 *st = (struct demod_state_afsk12 *)(&sm->d);
-	int j;
-	int sum;
-	unsigned char newsample;
-
-	for (; buflen > 0; buflen--, buf++) {
-		sum = do_filter_1200_u8(buf);
-		st->dcd_shreg <<= 1;
-		st->bit_pll += 0x2000;
-		newsample = (sum > 0);
-		if (st->last_sample ^ newsample) {
-			st->last_sample = newsample;
-			st->dcd_shreg |= 1;
-			st->bit_pll += pll_corr
-				[st->bit_pll < 0x9000];
-			j = 4 * hweight8(st->dcd_shreg & 0x38)
-				- hweight16(st->dcd_shreg & 0x7c0);
-			st->dcd_sum0 += j;
-		}
-		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 = 120;
-		}
-		if (st->bit_pll >= 0x10000) {
-			st->bit_pll &= 0xffff;
-			st->shreg >>= 1;
-			st->shreg |= (!(st->last_rxbit ^
-					st->last_sample)) << 16;
-			st->last_rxbit = st->last_sample;
-			diag_trigger(sm);
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-		}
-		diag_add(sm, (((int)*buf)-0x80) << 8, sum);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_1200_s16(struct sm_state *sm, const short *buf, unsigned int buflen)
-{
-	struct demod_state_afsk12 *st = (struct demod_state_afsk12 *)(&sm->d);
-	int j;
-	int sum;
-	unsigned char newsample;
-
-	for (; buflen > 0; buflen--, buf++) {
-		sum = do_filter_1200_s16(buf);
-		st->dcd_shreg <<= 1;
-		st->bit_pll += 0x2000;
-		newsample = (sum > 0);
-		if (st->last_sample ^ newsample) {
-			st->last_sample = newsample;
-			st->dcd_shreg |= 1;
-			st->bit_pll += pll_corr
-				[st->bit_pll < 0x9000];
-			j = 4 * hweight8(st->dcd_shreg & 0x38)
-				- hweight16(st->dcd_shreg & 0x7c0);
-			st->dcd_sum0 += j;
-		}
-		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 = 120;
-		}
-		if (st->bit_pll >= 0x10000) {
-			st->bit_pll &= 0xffff;
-			st->shreg >>= 1;
-			st->shreg |= (!(st->last_rxbit ^
-					st->last_sample)) << 16;
-			st->last_rxbit = st->last_sample;
-			diag_trigger(sm);
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-		}
-		diag_add(sm, *buf, sum);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demod_init_1200(struct sm_state *sm)
-{
-	struct demod_state_afsk12 *st = (struct demod_state_afsk12 *)(&sm->d);
-
-       	st->dcd_time = 120;
-	st->dcd_sum0 = 2;	
-}
-
-/* --------------------------------------------------------------------- */
-
-const struct modem_tx_info sm_afsk1200_tx = {
-	"afsk1200", sizeof(struct mod_state_afsk12), 
-	AFSK12_SAMPLE_RATE, 1200, modulator_1200_u8, modulator_1200_s16, NULL
-};
-
-const struct modem_rx_info sm_afsk1200_rx = {
-	"afsk1200", sizeof(struct demod_state_afsk12), 
-	AFSK12_SAMPLE_RATE, 1200, 8, AFSK12_SAMPLE_RATE/1200, 
-	demodulator_1200_u8, demodulator_1200_s16, demod_init_1200
-};
-
-/* --------------------------------------------------------------------- */

drivers/net/hamradio/soundmodem/sm_afsk2400_7.c

-/*****************************************************************************/
-
-/*
- *	sm_afsk2400_7.c  -- soundcard radio modem driver, 2400 baud AFSK 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 driver is intended to be compatible with TCM3105 modems
- * overclocked to 7.3728MHz. The mark and space frequencies therefore
- * lie at 3658 and 1996 Hz.
- * Note that I do _not_ recommend the building of such links, I provide
- * this only for the users who live in the coverage area of such
- * a "legacy" link.
- */
-
-#include "sm.h"
-#include "sm_tbl_afsk2400_7.h"
-
-/* --------------------------------------------------------------------- */
-
-struct demod_state_afsk24 {
-	unsigned int shreg;
-	unsigned int bit_pll;
-	unsigned char last_sample;
-	unsigned int dcd_shreg;
-	int dcd_sum0, dcd_sum1, dcd_sum2;
-	unsigned int dcd_time;
-	unsigned char last_rxbit;
-};
-
-struct mod_state_afsk24 {
-	unsigned int shreg;
-	unsigned char tx_bit;
-	unsigned int bit_pll;
-	unsigned int tx_seq;
-	unsigned int phinc;
-};
-
-/* --------------------------------------------------------------------- */
-
-static const int dds_inc[2] = { AFSK24_TX_FREQ_LO*0x10000/AFSK24_SAMPLERATE,
-				AFSK24_TX_FREQ_HI*0x10000/AFSK24_SAMPLERATE };
-
-static void modulator_2400_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
-{
-	struct mod_state_afsk24 *st = (struct mod_state_afsk24 *)(&sm->m);
-
-	for (; buflen > 0; buflen--, buf++) {
-		if (st->tx_seq < 0x5555) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->tx_bit = (st->tx_bit ^ (!(st->shreg & 1))) & 1;
-			st->shreg >>= 1;
-			st->phinc = dds_inc[st->tx_bit & 1];
-		}
-		st->tx_seq += 0x5555;
-		st->tx_seq &= 0xffff;
-		*buf = OFFSCOS(st->bit_pll);
-		st->bit_pll += st->phinc;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_2400_s16(struct sm_state *sm, short *buf, unsigned int buflen)
-{
-	struct mod_state_afsk24 *st = (struct mod_state_afsk24 *)(&sm->m);
-
-	for (; buflen > 0; buflen--, buf++) {
-		if (st->tx_seq < 0x5555) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->tx_bit = (st->tx_bit ^ (!(st->shreg & 1))) & 1;
-			st->shreg >>= 1;
-			st->phinc = dds_inc[st->tx_bit & 1];
-		}
-		st->tx_seq += 0x5555;
-		st->tx_seq &= 0xffff;
-		*buf = COS(st->bit_pll);
-		st->bit_pll += st->phinc;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static __inline__ int convolution14_u8(const unsigned char *st, const int *coeff, int csum)
-{
-	int sum = -0x80 * csum;
-	
-	sum += (st[0] * coeff[0]);
-	sum += (st[-1] * coeff[1]);
-	sum += (st[-2] * coeff[2]);
-	sum += (st[-3] * coeff[3]);
-	sum += (st[-4] * coeff[4]);
-	sum += (st[-5] * coeff[5]);
-	sum += (st[-6] * coeff[6]);
-	sum += (st[-7] * coeff[7]);
-	sum += (st[-8] * coeff[8]);
-	sum += (st[-9] * coeff[9]);
-	sum += (st[-10] * coeff[10]);
-	sum += (st[-11] * coeff[11]);
-	sum += (st[-12] * coeff[12]);
-	sum += (st[-13] * coeff[13]);
-
-	sum >>= 7;
-	return sum * sum;
-}
-
-static __inline__ int convolution14_s16(const short *st, const int *coeff, int csum)
-{
-	int sum = 0;
-	
-	sum += (st[0] * coeff[0]);
-	sum += (st[-1] * coeff[1]);
-	sum += (st[-2] * coeff[2]);
-	sum += (st[-3] * coeff[3]);
-	sum += (st[-4] * coeff[4]);
-	sum += (st[-5] * coeff[5]);
-	sum += (st[-6] * coeff[6]);
-	sum += (st[-7] * coeff[7]);
-	sum += (st[-8] * coeff[8]);
-	sum += (st[-9] * coeff[9]);
-	sum += (st[-10] * coeff[10]);
-	sum += (st[-11] * coeff[11]);
-	sum += (st[-12] * coeff[12]);
-	sum += (st[-13] * coeff[13]);
-
-	sum >>= 15;
-	return sum * sum;
-}
-
-static __inline__ int do_filter_2400_u8(const unsigned char *buf)
-{
-	int sum = convolution14_u8(buf, afsk24_tx_lo_i, SUM_AFSK24_TX_LO_I);
-	sum += convolution14_u8(buf, afsk24_tx_lo_q, SUM_AFSK24_TX_LO_Q);
-	sum -= convolution14_u8(buf, afsk24_tx_hi_i, SUM_AFSK24_TX_HI_I);
-	sum -= convolution14_u8(buf, afsk24_tx_hi_q, SUM_AFSK24_TX_HI_Q);
-	return sum;
-}
-
-static __inline__ int do_filter_2400_s16(const short *buf)
-{
-	int sum = convolution14_s16(buf, afsk24_tx_lo_i, SUM_AFSK24_TX_LO_I);
-	sum += convolution14_s16(buf, afsk24_tx_lo_q, SUM_AFSK24_TX_LO_Q);
-	sum -= convolution14_s16(buf, afsk24_tx_hi_i, SUM_AFSK24_TX_HI_I);
-	sum -= convolution14_s16(buf, afsk24_tx_hi_q, SUM_AFSK24_TX_HI_Q);
-	return sum;
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_2400_u8(struct sm_state *sm, const unsigned char *buf, unsigned int buflen)
-{
-	struct demod_state_afsk24 *st = (struct demod_state_afsk24 *)(&sm->d);
-	int j;
-	int sum;
-	unsigned char newsample;
-
-	for (; buflen > 0; buflen--, buf++) {
-		sum = do_filter_2400_u8(buf);
-		st->dcd_shreg <<= 1;
-		st->bit_pll += AFSK24_BITPLL_INC;
-		newsample = (sum > 0);
-		if (st->last_sample ^ newsample) {
-			st->last_sample = newsample;
-			st->dcd_shreg |= 1;
-			if (st->bit_pll < (0x8000+AFSK24_BITPLL_INC/2))
-				st->bit_pll += AFSK24_BITPLL_INC/2;
-			else
-				st->bit_pll -= AFSK24_BITPLL_INC/2;
-			j = /* 2 * */ hweight8(st->dcd_shreg & 0x1c)
-				- hweight16(st->dcd_shreg & 0x1e0);
-			st->dcd_sum0 += j;
-		}
-		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 = 120;
-		}
-		if (st->bit_pll >= 0x10000) {
-			st->bit_pll &= 0xffff;
-			st->shreg >>= 1;
-			st->shreg |= (!(st->last_rxbit ^
-					st->last_sample)) << 16;
-			st->last_rxbit = st->last_sample;
-			diag_trigger(sm);
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-		}
-		diag_add(sm, (((int)*buf)-0x80) << 8, sum);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_2400_s16(struct sm_state *sm, const short *buf, unsigned int buflen)
-{
-	struct demod_state_afsk24 *st = (struct demod_state_afsk24 *)(&sm->d);
-	int j;
-	int sum;
-	unsigned char newsample;
-
-	for (; buflen > 0; buflen--, buf++) {
-		sum = do_filter_2400_s16(buf);
-		st->dcd_shreg <<= 1;
-		st->bit_pll += AFSK24_BITPLL_INC;
-		newsample = (sum > 0);
-		if (st->last_sample ^ newsample) {
-			st->last_sample = newsample;
-			st->dcd_shreg |= 1;
-			if (st->bit_pll < (0x8000+AFSK24_BITPLL_INC/2))
-				st->bit_pll += AFSK24_BITPLL_INC/2;
-			else
-				st->bit_pll -= AFSK24_BITPLL_INC/2;
-			j = /* 2 * */ hweight8(st->dcd_shreg & 0x1c)
-				- hweight16(st->dcd_shreg & 0x1e0);
-			st->dcd_sum0 += j;
-		}
-		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 = 120;
-		}
-		if (st->bit_pll >= 0x10000) {
-			st->bit_pll &= 0xffff;
-			st->shreg >>= 1;
-			st->shreg |= (!(st->last_rxbit ^
-					st->last_sample)) << 16;
-			st->last_rxbit = st->last_sample;
-			diag_trigger(sm);
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-		}
-		diag_add(sm, *buf, sum);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demod_init_2400(struct sm_state *sm)
-{
-	struct demod_state_afsk24 *st = (struct demod_state_afsk24 *)(&sm->d);
-
-       	st->dcd_time = 120;
-	st->dcd_sum0 = 2;
-}
-
-/* --------------------------------------------------------------------- */
-
-const struct modem_tx_info sm_afsk2400_7_tx = {
-	"afsk2400_7", sizeof(struct mod_state_afsk24), AFSK24_SAMPLERATE, 2400, 
-	modulator_2400_u8, modulator_2400_s16, NULL
-};
-
-const struct modem_rx_info sm_afsk2400_7_rx = {
-	"afsk2400_7", sizeof(struct demod_state_afsk24), 
-	AFSK24_SAMPLERATE, 2400, 14, AFSK24_SAMPLERATE/2400, 
-	demodulator_2400_u8, demodulator_2400_s16, demod_init_2400
-};
-
-/* --------------------------------------------------------------------- */

drivers/net/hamradio/soundmodem/sm_afsk2400_8.c

-/*****************************************************************************/
-
-/*
- *	sm_afsk2400_8.c  -- soundcard radio modem driver, 2400 baud AFSK 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 driver is intended to be compatible with TCM3105 modems
- * overclocked to 8MHz. The mark and space frequencies therefore
- * lie at 3970 and 2165 Hz.
- * Note that I do _not_ recommend the building of such links, I provide
- * this only for the users who live in the coverage area of such
- * a "legacy" link.
- */
-
-#include "sm.h"
-#include "sm_tbl_afsk2400_8.h"
-
-/* --------------------------------------------------------------------- */
-
-struct demod_state_afsk24 {
-	unsigned int shreg;
-	unsigned int bit_pll;
-	unsigned char last_sample;
-	unsigned int dcd_shreg;
-	int dcd_sum0, dcd_sum1, dcd_sum2;
-	unsigned int dcd_time;
-	unsigned char last_rxbit;
-};
-
-struct mod_state_afsk24 {
-	unsigned int shreg;
-	unsigned char tx_bit;
-	unsigned int bit_pll;
-	unsigned int tx_seq;
-	unsigned int phinc;
-};
-
-/* --------------------------------------------------------------------- */
-
-static const int dds_inc[2] = { AFSK24_TX_FREQ_LO*0x10000/AFSK24_SAMPLERATE,
-				AFSK24_TX_FREQ_HI*0x10000/AFSK24_SAMPLERATE };
-
-static void modulator_2400_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
-{
-	struct mod_state_afsk24 *st = (struct mod_state_afsk24 *)(&sm->m);
-
-	for (; buflen > 0; buflen--, buf++) {
-		if (st->tx_seq < 0x5555) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->tx_bit = (st->tx_bit ^ (!(st->shreg & 1))) & 1;
-			st->shreg >>= 1;
-			st->phinc = dds_inc[st->tx_bit & 1];
-		}
-		st->tx_seq += 0x5555;
-		st->tx_seq &= 0xffff;
-		*buf = OFFSCOS(st->bit_pll);
-		st->bit_pll += st->phinc;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void modulator_2400_s16(struct sm_state *sm, short *buf, unsigned int buflen)
-{
-	struct mod_state_afsk24 *st = (struct mod_state_afsk24 *)(&sm->m);
-
-	for (; buflen > 0; buflen--, buf++) {
-		if (st->tx_seq < 0x5555) {
-			if (st->shreg <= 1)
-				st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
-			st->tx_bit = (st->tx_bit ^ (!(st->shreg & 1))) & 1;
-			st->shreg >>= 1;
-			st->phinc = dds_inc[st->tx_bit & 1];
-		}
-		st->tx_seq += 0x5555;
-		st->tx_seq &= 0xffff;
-		*buf = COS(st->bit_pll);
-		st->bit_pll += st->phinc;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static __inline__ int convolution14_u8(const unsigned char *st, const int *coeff, int csum)
-{
-	int sum = -0x80 * csum;
-	
-	sum += (st[0] * coeff[0]);
-	sum += (st[-1] * coeff[1]);
-	sum += (st[-2] * coeff[2]);
-	sum += (st[-3] * coeff[3]);
-	sum += (st[-4] * coeff[4]);
-	sum += (st[-5] * coeff[5]);
-	sum += (st[-6] * coeff[6]);
-	sum += (st[-7] * coeff[7]);
-	sum += (st[-8] * coeff[8]);
-	sum += (st[-9] * coeff[9]);
-	sum += (st[-10] * coeff[10]);
-	sum += (st[-11] * coeff[11]);
-	sum += (st[-12] * coeff[12]);
-	sum += (st[-13] * coeff[13]);
-
-	sum >>= 7;
-	return sum * sum;
-}
-
-static __inline__ int convolution14_s16(const short *st, const int *coeff, int csum)
-{
-	int sum = 0;
-	
-	sum += (st[0] * coeff[0]);
-	sum += (st[-1] * coeff[1]);
-	sum += (st[-2] * coeff[2]);
-	sum += (st[-3] * coeff[3]);
-	sum += (st[-4] * coeff[4]);
-	sum += (st[-5] * coeff[5]);
-	sum += (st[-6] * coeff[6]);
-	sum += (st[-7] * coeff[7]);
-	sum += (st[-8] * coeff[8]);
-	sum += (st[-9] * coeff[9]);
-	sum += (st[-10] * coeff[10]);
-	sum += (st[-11] * coeff[11]);
-	sum += (st[-12] * coeff[12]);
-	sum += (st[-13] * coeff[13]);
-
-	sum >>= 15;
-	return sum * sum;
-}
-
-static __inline__ int do_filter_2400_u8(const unsigned char *buf)
-{
-	int sum = convolution14_u8(buf, afsk24_tx_lo_i, SUM_AFSK24_TX_LO_I);
-	sum += convolution14_u8(buf, afsk24_tx_lo_q, SUM_AFSK24_TX_LO_Q);
-	sum -= convolution14_u8(buf, afsk24_tx_hi_i, SUM_AFSK24_TX_HI_I);
-	sum -= convolution14_u8(buf, afsk24_tx_hi_q, SUM_AFSK24_TX_HI_Q);
-	return sum;
-}
-
-static __inline__ int do_filter_2400_s16(const short *buf)
-{
-	int sum = convolution14_s16(buf, afsk24_tx_lo_i, SUM_AFSK24_TX_LO_I);
-	sum += convolution14_s16(buf, afsk24_tx_lo_q, SUM_AFSK24_TX_LO_Q);
-	sum -= convolution14_s16(buf, afsk24_tx_hi_i, SUM_AFSK24_TX_HI_I);
-	sum -= convolution14_s16(buf, afsk24_tx_hi_q, SUM_AFSK24_TX_HI_Q);
-	return sum;
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_2400_u8(struct sm_state *sm, const unsigned char *buf, unsigned int buflen)
-{
-	struct demod_state_afsk24 *st = (struct demod_state_afsk24 *)(&sm->d);
-	int j;
-	int sum;
-	unsigned char newsample;
-
-	for (; buflen > 0; buflen--, buf++) {
-		sum = do_filter_2400_u8(buf);
-		st->dcd_shreg <<= 1;
-		st->bit_pll += AFSK24_BITPLL_INC;
-		newsample = (sum > 0);
-		if (st->last_sample ^ newsample) {
-			st->last_sample = newsample;
-			st->dcd_shreg |= 1;
-			if (st->bit_pll < (0x8000+AFSK24_BITPLL_INC/2))
-				st->bit_pll += AFSK24_BITPLL_INC/2;
-			else
-				st->bit_pll -= AFSK24_BITPLL_INC/2;
-			j = /* 2 * */ hweight8(st->dcd_shreg & 0x1c)
-				- hweight16(st->dcd_shreg & 0x1e0);
-			st->dcd_sum0 += j;
-		}
-		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 = 120;
-		}
-		if (st->bit_pll >= 0x10000) {
-			st->bit_pll &= 0xffff;
-			st->shreg >>= 1;
-			st->shreg |= (!(st->last_rxbit ^
-					st->last_sample)) << 16;
-			st->last_rxbit = st->last_sample;
-			diag_trigger(sm);
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-		}
-		diag_add(sm, (((int)*buf)-0x80) << 8, sum);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demodulator_2400_s16(struct sm_state *sm, const short *buf, unsigned int buflen)
-{
-	struct demod_state_afsk24 *st = (struct demod_state_afsk24 *)(&sm->d);
-	int j;
-	int sum;
-	unsigned char newsample;
-
-	for (; buflen > 0; buflen--, buf++) {
-		sum = do_filter_2400_s16(buf);
-		st->dcd_shreg <<= 1;
-		st->bit_pll += AFSK24_BITPLL_INC;
-		newsample = (sum > 0);
-		if (st->last_sample ^ newsample) {
-			st->last_sample = newsample;
-			st->dcd_shreg |= 1;
-			if (st->bit_pll < (0x8000+AFSK24_BITPLL_INC/2))
-				st->bit_pll += AFSK24_BITPLL_INC/2;
-			else
-				st->bit_pll -= AFSK24_BITPLL_INC/2;
-			j = /* 2 * */ hweight8(st->dcd_shreg & 0x1c)
-				- hweight16(st->dcd_shreg & 0x1e0);
-			st->dcd_sum0 += j;
-		}
-		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 = 120;
-		}
-		if (st->bit_pll >= 0x10000) {
-			st->bit_pll &= 0xffff;
-			st->shreg >>= 1;
-			st->shreg |= (!(st->last_rxbit ^
-					st->last_sample)) << 16;
-			st->last_rxbit = st->last_sample;
-			diag_trigger(sm);
-			if (st->shreg & 1) {
-				hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
-				st->shreg = 0x10000;
-			}
-		}
-		diag_add(sm, *buf, sum);
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static void demod_init_2400(struct sm_state *sm)
-{
-	struct demod_state_afsk24 *st = (struct demod_state_afsk24 *)(&sm->d);
-
-       	st->dcd_time = 120;
-	st->dcd_sum0 = 2;
-}
-
-/* --------------------------------------------------------------------- */
-
-const struct modem_tx_info sm_afsk2400_8_tx = {
-	"afsk2400_8", sizeof(struct mod_state_afsk24), AFSK24_SAMPLERATE, 2400, 
-	modulator_2400_u8, modulator_2400_s16, NULL
-};
-
-const struct modem_rx_info sm_afsk2400_8_rx = {
-	"afsk2400_8", sizeof(struct demod_state_afsk24), 
-	AFSK24_SAMPLERATE, 2400, 14, AFSK24_SAMPLERATE/2400, 
-	demodulator_2400_u8, demodulator_2400_s16, demod_init_2400
-};
-
-/* --------------------------------------------------------------------- */

drivers/net/hamradio/soundmodem/smdma.h

-/*****************************************************************************/
-
-/*
- *	smdma.h  --  soundcard radio modem driver dma buffer routines.
- *
- *	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.
- *
- */
-
-#ifndef _SMDMA_H
-#define _SMDMA_H
-
-/* ---------------------------------------------------------------------- */
-
-#include "sm.h"
-
-/* ---------------------------------------------------------------------- */
-
-#define DMA_MODE_AUTOINIT      0x10
-#define NUM_FRAGMENTS          4
-
-/*
- * NOTE: make sure that hdlcdrv_hdlcbuffer contains enough space
- * for the modulator to fill the whole DMA buffer without underrun
- * at the highest possible baud rate, otherwise the TX state machine will
- * not work correctly. That is (9k6 FSK): HDLCDRV_HDLCBUFFER > 6*NUM_FRAGMENTS
- */ 
-
-/* --------------------------------------------------------------------- */
-/*
- * ===================== DMA buffer management ===========================
- */
-
-/*
- * returns the number of samples per fragment
- */
-static __inline__ unsigned int dma_setup(struct sm_state *sm, int send, unsigned int dmanr)
-{
-	if (send) {
-		disable_dma(dmanr);
-		clear_dma_ff(dmanr);
-		set_dma_mode(dmanr, DMA_MODE_WRITE | DMA_MODE_AUTOINIT);
-		set_dma_addr(dmanr, virt_to_bus(sm->dma.obuf));
-		set_dma_count(dmanr, sm->dma.ofragsz * NUM_FRAGMENTS);
-		enable_dma(dmanr);
-		if (sm->dma.o16bit)
-			return sm->dma.ofragsz/2;
-		return sm->dma.ofragsz;
-	} else {
-		disable_dma(dmanr);
-		clear_dma_ff(dmanr);
-		set_dma_mode(dmanr, DMA_MODE_READ | DMA_MODE_AUTOINIT);
-		set_dma_addr(dmanr, virt_to_bus(sm->dma.ibuf));
-		set_dma_count(dmanr, sm->dma.ifragsz * NUM_FRAGMENTS);
-		enable_dma(dmanr);
-		if (sm->dma.i16bit)
-			return sm->dma.ifragsz/2;
-		return sm->dma.ifragsz;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static __inline__ unsigned int dma_ptr(struct sm_state *sm, int send, unsigned int dmanr,
-				       unsigned int *curfrag)
-{
-	unsigned int dmaptr, sz, frg, offs;
-	
-	dmaptr = get_dma_residue(dmanr);
-	if (send) {
-		sz = sm->dma.ofragsz * NUM_FRAGMENTS;
-		if (dmaptr == 0 || dmaptr > sz)
-			dmaptr = sz;
-		dmaptr--;
-		frg = dmaptr / sm->dma.ofragsz;
-		offs = (dmaptr % sm->dma.ofragsz) + 1;
-		*curfrag = NUM_FRAGMENTS - 1 - frg;
-#ifdef SM_DEBUG
-		if (!sm->debug_vals.dma_residue || offs < sm->debug_vals.dma_residue)
-			sm->debug_vals.dma_residue = offs;
-#endif /* SM_DEBUG */
-		if (sm->dma.o16bit)
-			return offs/2;
-		return offs;
-	} else {
-		sz = sm->dma.ifragsz * NUM_FRAGMENTS;
-		if (dmaptr == 0 || dmaptr > sz)
-			dmaptr = sz;
-		dmaptr--;
-		frg = dmaptr / sm->dma.ifragsz;
-		offs = (dmaptr % sm->dma.ifragsz) + 1;
-		*curfrag = NUM_FRAGMENTS - 1 - frg;
-#ifdef SM_DEBUG
-		if (!sm->debug_vals.dma_residue || offs < sm->debug_vals.dma_residue)
-			sm->debug_vals.dma_residue = offs;
-#endif /* SM_DEBUG */
-		if (sm->dma.i16bit)
-			return offs/2;
-		return offs;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-
-static __inline__ int dma_end_transmit(struct sm_state *sm, unsigned int curfrag)
-{
-	unsigned int diff = (NUM_FRAGMENTS + curfrag - sm->dma.ofragptr) % NUM_FRAGMENTS;
-
-	sm->dma.ofragptr = curfrag;
-	if (sm->dma.ptt_cnt <= 0) {
-		sm->dma.ptt_cnt = 0;
-		return 0;
-	}
-	sm->dma.ptt_cnt -= diff;
-	if (sm->dma.ptt_cnt <= 0) {
-		sm->dma.ptt_cnt = 0;
-		return -1;
-	}
-	return 0;
-}
-
-static __inline__ void dma_transmit(struct sm_state *sm)
-{
-	void *p;
-
-	while (sm->dma.ptt_cnt < NUM_FRAGMENTS && hdlcdrv_ptt(&sm->hdrv)) {
-		p = (unsigned char *)sm->dma.obuf + sm->dma.ofragsz *
-			((sm->dma.ofragptr + sm->dma.ptt_cnt) % NUM_FRAGMENTS);
-		if (sm->dma.o16bit) {
-			time_exec(sm->debug_vals.mod_cyc, 
-				  sm->mode_tx->modulator_s16(sm, p, sm->dma.ofragsz/2));
-		} else {
-			time_exec(sm->debug_vals.mod_cyc, 
-				  sm->mode_tx->modulator_u8(sm, p, sm->dma.ofragsz));
-		}
-		sm->dma.ptt_cnt++;
-	}
-}
-
-static __inline__ void dma_init_transmit(struct sm_state *sm)
-{
-	sm->dma.ofragptr = 0;
-	sm->dma.ptt_cnt = 0;
-}
-
-static __inline__ void dma_start_transmit(struct sm_state *sm)
-{
-	sm->dma.ofragptr = 0;
-	if (sm->dma.o16bit) {
-		time_exec(sm->debug_vals.mod_cyc, 
-			  sm->mode_tx->modulator_s16(sm, sm->dma.obuf, sm->dma.ofragsz/2));
-	} else {
-		time_exec(sm->debug_vals.mod_cyc, 
-			  sm->mode_tx->modulator_u8(sm, sm->dma.obuf, sm->dma.ofragsz));
-	}
-	sm->dma.ptt_cnt = 1;
-}
-
-static __inline__ void dma_clear_transmit(struct sm_state *sm)
-{
-	sm->dma.ptt_cnt = 0;
-	memset(sm->dma.obuf, (sm->dma.o16bit) ? 0 : 0x80, sm->dma.ofragsz * NUM_FRAGMENTS);
-}
-
-/* --------------------------------------------------------------------- */
-
-static __inline__ void dma_receive(struct sm_state *sm, unsigned int curfrag)
-{
-	void *p;
-
-	while (sm->dma.ifragptr != curfrag) {
-		if (sm->dma.ifragptr)
-			p = (unsigned char *)sm->dma.ibuf + 
-				sm->dma.ifragsz * sm->dma.ifragptr;
-		else {
-			p = (unsigned char *)sm->dma.ibuf + NUM_FRAGMENTS * sm->dma.ifragsz;
-			memcpy(p, sm->dma.ibuf, sm->dma.ifragsz);
-		}
-		if (sm->dma.o16bit) {
-			time_exec(sm->debug_vals.demod_cyc, 
-				  sm->mode_rx->demodulator_s16(sm, p, sm->dma.ifragsz/2));
-		} else {
-			time_exec(sm->debug_vals.demod_cyc, 
-				  sm->mode_rx->demodulator_u8(sm, p, sm->dma.ifragsz));
-		}
-		sm->dma.ifragptr = (sm->dma.ifragptr + 1) % NUM_FRAGMENTS;
-	}
-}
-
-static __inline__ void dma_init_receive(struct sm_state *sm)
-{
-	sm->dma.ifragptr = 0;
-}
-
-/* --------------------------------------------------------------------- */
-#endif /* _SMDMA_H */
-
-
-