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-rw-r--r--drivers/isdn/mISDN/Kconfig18
-rw-r--r--drivers/isdn/mISDN/Makefile2
-rw-r--r--drivers/isdn/mISDN/dsp.h263
-rw-r--r--drivers/isdn/mISDN/dsp_audio.c434
-rw-r--r--drivers/isdn/mISDN/dsp_biquad.h65
-rw-r--r--drivers/isdn/mISDN/dsp_blowfish.c672
-rw-r--r--drivers/isdn/mISDN/dsp_cmx.c1886
-rw-r--r--drivers/isdn/mISDN/dsp_core.c1191
-rw-r--r--drivers/isdn/mISDN/dsp_dtmf.c303
-rw-r--r--drivers/isdn/mISDN/dsp_ecdis.h110
-rw-r--r--drivers/isdn/mISDN/dsp_hwec.c138
-rw-r--r--drivers/isdn/mISDN/dsp_hwec.h10
-rw-r--r--drivers/isdn/mISDN/dsp_pipeline.c348
-rw-r--r--drivers/isdn/mISDN/dsp_tones.c551
14 files changed, 5991 insertions, 0 deletions
diff --git a/drivers/isdn/mISDN/Kconfig b/drivers/isdn/mISDN/Kconfig
index 231bd0d08316..6a97e86e7f21 100644
--- a/drivers/isdn/mISDN/Kconfig
+++ b/drivers/isdn/mISDN/Kconfig
@@ -7,3 +7,21 @@ menuconfig MISDN
7 help 7 help
8 Enable support for the modular ISDN driver. 8 Enable support for the modular ISDN driver.
9 9
10if MISDN != n
11
12config MISDN_DSP
13 tristate "Digital Audio Processing of transparent data"
14 depends on MISDN
15 help
16 Enable support for digital audio processing capability.
17 This module may be used for special applications that require
18 cross connecting of bchannels, conferencing, dtmf decoding
19 echo cancelation, tone generation, and Blowfish encryption and
20 decryption.
21 It may use hardware features if available.
22 E.g. it is required for PBX4Linux. Go to http://isdn.eversberg.eu
23 and get more informations about this module and it's usage.
24 If unsure, say 'N'.
25
26 source "drivers/isdn/hardware/mISDN/Kconfig"
27endif #MISDN
diff --git a/drivers/isdn/mISDN/Makefile b/drivers/isdn/mISDN/Makefile
index 87c563d33612..7f1a21804208 100644
--- a/drivers/isdn/mISDN/Makefile
+++ b/drivers/isdn/mISDN/Makefile
@@ -3,7 +3,9 @@
3# 3#
4 4
5obj-$(CONFIG_MISDN) += mISDN_core.o 5obj-$(CONFIG_MISDN) += mISDN_core.o
6obj-$(CONFIG_MISDN_DSP) += mISDN_dsp.o
6 7
7# multi objects 8# multi objects
8 9
9mISDN_core-objs := core.o fsm.o socket.o hwchannel.o stack.o layer1.o layer2.o tei.o timerdev.o 10mISDN_core-objs := core.o fsm.o socket.o hwchannel.o stack.o layer1.o layer2.o tei.o timerdev.o
11mISDN_dsp-objs := dsp_core.o dsp_cmx.o dsp_tones.o dsp_dtmf.o dsp_audio.o dsp_blowfish.o dsp_pipeline.o dsp_hwec.o
diff --git a/drivers/isdn/mISDN/dsp.h b/drivers/isdn/mISDN/dsp.h
new file mode 100644
index 000000000000..6c3fed6b8d4f
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp.h
@@ -0,0 +1,263 @@
1/*
2 * Audio support data for ISDN4Linux.
3 *
4 * Copyright 2002/2003 by Andreas Eversberg (jolly@eversberg.eu)
5 *
6 * This software may be used and distributed according to the terms
7 * of the GNU General Public License, incorporated herein by reference.
8 *
9 */
10
11#define DEBUG_DSP_CTRL 0x0001
12#define DEBUG_DSP_CORE 0x0002
13#define DEBUG_DSP_DTMF 0x0004
14#define DEBUG_DSP_CMX 0x0010
15#define DEBUG_DSP_TONE 0x0020
16#define DEBUG_DSP_BLOWFISH 0x0040
17#define DEBUG_DSP_DELAY 0x0100
18#define DEBUG_DSP_DTMFCOEFF 0x8000 /* heavy output */
19
20/* options may be:
21 *
22 * bit 0 = use ulaw instead of alaw
23 * bit 1 = enable hfc hardware accelleration for all channels
24 *
25 */
26#define DSP_OPT_ULAW (1<<0)
27#define DSP_OPT_NOHARDWARE (1<<1)
28
29#include <linux/timer.h>
30#include <linux/workqueue.h>
31
32#include "dsp_ecdis.h"
33
34extern int dsp_options;
35extern int dsp_debug;
36extern int dsp_poll;
37extern int dsp_tics;
38extern spinlock_t dsp_lock;
39extern struct work_struct dsp_workq;
40extern u32 dsp_poll_diff; /* calculated fix-comma corrected poll value */
41
42/***************
43 * audio stuff *
44 ***************/
45
46extern s32 dsp_audio_alaw_to_s32[256];
47extern s32 dsp_audio_ulaw_to_s32[256];
48extern s32 *dsp_audio_law_to_s32;
49extern u8 dsp_audio_s16_to_law[65536];
50extern u8 dsp_audio_alaw_to_ulaw[256];
51extern u8 dsp_audio_mix_law[65536];
52extern u8 dsp_audio_seven2law[128];
53extern u8 dsp_audio_law2seven[256];
54extern void dsp_audio_generate_law_tables(void);
55extern void dsp_audio_generate_s2law_table(void);
56extern void dsp_audio_generate_seven(void);
57extern void dsp_audio_generate_mix_table(void);
58extern void dsp_audio_generate_ulaw_samples(void);
59extern void dsp_audio_generate_volume_changes(void);
60extern u8 dsp_silence;
61
62
63/*************
64 * cmx stuff *
65 *************/
66
67#define MAX_POLL 256 /* maximum number of send-chunks */
68
69#define CMX_BUFF_SIZE 0x8000 /* must be 2**n (0x1000 about 1/2 second) */
70#define CMX_BUFF_HALF 0x4000 /* CMX_BUFF_SIZE / 2 */
71#define CMX_BUFF_MASK 0x7fff /* CMX_BUFF_SIZE - 1 */
72
73/* how many seconds will we check the lowest delay until the jitter buffer
74 is reduced by that delay */
75#define MAX_SECONDS_JITTER_CHECK 5
76
77extern struct timer_list dsp_spl_tl;
78extern u32 dsp_spl_jiffies;
79
80/* the structure of conferences:
81 *
82 * each conference has a unique number, given by user space.
83 * the conferences are linked in a chain.
84 * each conference has members linked in a chain.
85 * each dsplayer points to a member, each member points to a dsplayer.
86 */
87
88/* all members within a conference (this is linked 1:1 with the dsp) */
89struct dsp;
90struct dsp_conf_member {
91 struct list_head list;
92 struct dsp *dsp;
93};
94
95/* the list of all conferences */
96struct dsp_conf {
97 struct list_head list;
98 u32 id;
99 /* all cmx stacks with the same ID are
100 connected */
101 struct list_head mlist;
102 int software; /* conf is processed by software */
103 int hardware; /* conf is processed by hardware */
104 /* note: if both unset, has only one member */
105};
106
107
108/**************
109 * DTMF stuff *
110 **************/
111
112#define DSP_DTMF_NPOINTS 102
113
114#define ECHOCAN_BUFLEN (4*128)
115
116struct dsp_dtmf {
117 int treshold; /* above this is dtmf (square of) */
118 int software; /* dtmf uses software decoding */
119 int hardware; /* dtmf uses hardware decoding */
120 int size; /* number of bytes in buffer */
121 signed short buffer[DSP_DTMF_NPOINTS];
122 /* buffers one full dtmf frame */
123 u8 lastwhat, lastdigit;
124 int count;
125 u8 digits[16]; /* just the dtmf result */
126};
127
128
129/******************
130 * pipeline stuff *
131 ******************/
132struct dsp_pipeline {
133 rwlock_t lock;
134 struct list_head list;
135 int inuse;
136};
137
138/***************
139 * tones stuff *
140 ***************/
141
142struct dsp_tone {
143 int software; /* tones are generated by software */
144 int hardware; /* tones are generated by hardware */
145 int tone;
146 void *pattern;
147 int count;
148 int index;
149 struct timer_list tl;
150};
151
152/*****************
153 * general stuff *
154 *****************/
155
156struct dsp {
157 struct list_head list;
158 struct mISDNchannel ch;
159 struct mISDNchannel *up;
160 unsigned char name[64];
161 int b_active;
162 int echo; /* echo is enabled */
163 int rx_disabled; /* what the user wants */
164 int rx_is_off; /* what the card is */
165 int tx_mix;
166 struct dsp_tone tone;
167 struct dsp_dtmf dtmf;
168 int tx_volume, rx_volume;
169
170 /* queue for sending frames */
171 struct work_struct workq;
172 struct sk_buff_head sendq;
173 int hdlc; /* if mode is hdlc */
174 int data_pending; /* currently an unconfirmed frame */
175
176 /* conference stuff */
177 u32 conf_id;
178 struct dsp_conf *conf;
179 struct dsp_conf_member
180 *member;
181
182 /* buffer stuff */
183 int rx_W; /* current write pos for data without timestamp */
184 int rx_R; /* current read pos for transmit clock */
185 int rx_init; /* if set, pointers will be adjusted first */
186 int tx_W; /* current write pos for transmit data */
187 int tx_R; /* current read pos for transmit clock */
188 int rx_delay[MAX_SECONDS_JITTER_CHECK];
189 int tx_delay[MAX_SECONDS_JITTER_CHECK];
190 u8 tx_buff[CMX_BUFF_SIZE];
191 u8 rx_buff[CMX_BUFF_SIZE];
192 int last_tx; /* if set, we transmitted last poll interval */
193 int cmx_delay; /* initial delay of buffers,
194 or 0 for dynamic jitter buffer */
195 int tx_dejitter; /* if set, dejitter tx buffer */
196 int tx_data; /* enables tx-data of CMX to upper layer */
197
198 /* hardware stuff */
199 struct dsp_features features;
200 int features_rx_off; /* set if rx_off is featured */
201 int pcm_slot_rx; /* current PCM slot (or -1) */
202 int pcm_bank_rx;
203 int pcm_slot_tx;
204 int pcm_bank_tx;
205 int hfc_conf; /* unique id of current conference (or -1) */
206
207 /* encryption stuff */
208 int bf_enable;
209 u32 bf_p[18];
210 u32 bf_s[1024];
211 int bf_crypt_pos;
212 u8 bf_data_in[9];
213 u8 bf_crypt_out[9];
214 int bf_decrypt_in_pos;
215 int bf_decrypt_out_pos;
216 u8 bf_crypt_inring[16];
217 u8 bf_data_out[9];
218 int bf_sync;
219
220 struct dsp_pipeline
221 pipeline;
222};
223
224/* functions */
225
226extern void dsp_change_volume(struct sk_buff *skb, int volume);
227
228extern struct list_head dsp_ilist;
229extern struct list_head conf_ilist;
230extern void dsp_cmx_debug(struct dsp *dsp);
231extern void dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp);
232extern int dsp_cmx_conf(struct dsp *dsp, u32 conf_id);
233extern void dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb);
234extern void dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb);
235extern void dsp_cmx_send(void *arg);
236extern void dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb);
237extern int dsp_cmx_del_conf_member(struct dsp *dsp);
238extern int dsp_cmx_del_conf(struct dsp_conf *conf);
239
240extern void dsp_dtmf_goertzel_init(struct dsp *dsp);
241extern void dsp_dtmf_hardware(struct dsp *dsp);
242extern u8 *dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len,
243 int fmt);
244
245extern int dsp_tone(struct dsp *dsp, int tone);
246extern void dsp_tone_copy(struct dsp *dsp, u8 *data, int len);
247extern void dsp_tone_timeout(void *arg);
248
249extern void dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len);
250extern void dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len);
251extern int dsp_bf_init(struct dsp *dsp, const u8 *key, unsigned int keylen);
252extern void dsp_bf_cleanup(struct dsp *dsp);
253
254extern int dsp_pipeline_module_init(void);
255extern void dsp_pipeline_module_exit(void);
256extern int dsp_pipeline_init(struct dsp_pipeline *pipeline);
257extern void dsp_pipeline_destroy(struct dsp_pipeline *pipeline);
258extern int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg);
259extern void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data,
260 int len);
261extern void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data,
262 int len);
263
diff --git a/drivers/isdn/mISDN/dsp_audio.c b/drivers/isdn/mISDN/dsp_audio.c
new file mode 100644
index 000000000000..1c2dd5694773
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_audio.c
@@ -0,0 +1,434 @@
1/*
2 * Audio support data for mISDN_dsp.
3 *
4 * Copyright 2002/2003 by Andreas Eversberg (jolly@eversberg.eu)
5 * Rewritten by Peter
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11
12#include <linux/delay.h>
13#include <linux/mISDNif.h>
14#include <linux/mISDNdsp.h>
15#include "core.h"
16#include "dsp.h"
17
18/* ulaw[unsigned char] -> signed 16-bit */
19s32 dsp_audio_ulaw_to_s32[256];
20/* alaw[unsigned char] -> signed 16-bit */
21s32 dsp_audio_alaw_to_s32[256];
22
23s32 *dsp_audio_law_to_s32;
24EXPORT_SYMBOL(dsp_audio_law_to_s32);
25
26/* signed 16-bit -> law */
27u8 dsp_audio_s16_to_law[65536];
28EXPORT_SYMBOL(dsp_audio_s16_to_law);
29
30/* alaw -> ulaw */
31u8 dsp_audio_alaw_to_ulaw[256];
32/* ulaw -> alaw */
33u8 dsp_audio_ulaw_to_alaw[256];
34u8 dsp_silence;
35
36
37/*****************************************************
38 * generate table for conversion of s16 to alaw/ulaw *
39 *****************************************************/
40
41#define AMI_MASK 0x55
42
43static inline unsigned char linear2alaw(short int linear)
44{
45 int mask;
46 int seg;
47 int pcm_val;
48 static int seg_end[8] = {
49 0xFF, 0x1FF, 0x3FF, 0x7FF, 0xFFF, 0x1FFF, 0x3FFF, 0x7FFF
50 };
51
52 pcm_val = linear;
53 if (pcm_val >= 0) {
54 /* Sign (7th) bit = 1 */
55 mask = AMI_MASK | 0x80;
56 } else {
57 /* Sign bit = 0 */
58 mask = AMI_MASK;
59 pcm_val = -pcm_val;
60 }
61
62 /* Convert the scaled magnitude to segment number. */
63 for (seg = 0; seg < 8; seg++) {
64 if (pcm_val <= seg_end[seg])
65 break;
66 }
67 /* Combine the sign, segment, and quantization bits. */
68 return ((seg << 4) |
69 ((pcm_val >> ((seg) ? (seg + 3) : 4)) & 0x0F)) ^ mask;
70}
71
72
73static inline short int alaw2linear(unsigned char alaw)
74{
75 int i;
76 int seg;
77
78 alaw ^= AMI_MASK;
79 i = ((alaw & 0x0F) << 4) + 8 /* rounding error */;
80 seg = (((int) alaw & 0x70) >> 4);
81 if (seg)
82 i = (i + 0x100) << (seg - 1);
83 return (short int) ((alaw & 0x80) ? i : -i);
84}
85
86static inline short int ulaw2linear(unsigned char ulaw)
87{
88 short mu, e, f, y;
89 static short etab[] = {0, 132, 396, 924, 1980, 4092, 8316, 16764};
90
91 mu = 255 - ulaw;
92 e = (mu & 0x70) / 16;
93 f = mu & 0x0f;
94 y = f * (1 << (e + 3));
95 y += etab[e];
96 if (mu & 0x80)
97 y = -y;
98 return y;
99}
100
101#define BIAS 0x84 /*!< define the add-in bias for 16 bit samples */
102
103static unsigned char linear2ulaw(short sample)
104{
105 static int exp_lut[256] = {
106 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
107 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
108 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
109 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
110 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
111 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
112 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
113 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
114 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
115 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
116 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
117 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
118 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
119 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
120 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
121 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7};
122 int sign, exponent, mantissa;
123 unsigned char ulawbyte;
124
125 /* Get the sample into sign-magnitude. */
126 sign = (sample >> 8) & 0x80; /* set aside the sign */
127 if (sign != 0)
128 sample = -sample; /* get magnitude */
129
130 /* Convert from 16 bit linear to ulaw. */
131 sample = sample + BIAS;
132 exponent = exp_lut[(sample >> 7) & 0xFF];
133 mantissa = (sample >> (exponent + 3)) & 0x0F;
134 ulawbyte = ~(sign | (exponent << 4) | mantissa);
135
136 return ulawbyte;
137}
138
139static int reverse_bits(int i)
140{
141 int z, j;
142 z = 0;
143
144 for (j = 0; j < 8; j++) {
145 if ((i & (1 << j)) != 0)
146 z |= 1 << (7 - j);
147 }
148 return z;
149}
150
151
152void dsp_audio_generate_law_tables(void)
153{
154 int i;
155 for (i = 0; i < 256; i++)
156 dsp_audio_alaw_to_s32[i] = alaw2linear(reverse_bits(i));
157
158 for (i = 0; i < 256; i++)
159 dsp_audio_ulaw_to_s32[i] = ulaw2linear(reverse_bits(i));
160
161 for (i = 0; i < 256; i++) {
162 dsp_audio_alaw_to_ulaw[i] =
163 linear2ulaw(dsp_audio_alaw_to_s32[i]);
164 dsp_audio_ulaw_to_alaw[i] =
165 linear2alaw(dsp_audio_ulaw_to_s32[i]);
166 }
167}
168
169void
170dsp_audio_generate_s2law_table(void)
171{
172 int i;
173
174 if (dsp_options & DSP_OPT_ULAW) {
175 /* generating ulaw-table */
176 for (i = -32768; i < 32768; i++) {
177 dsp_audio_s16_to_law[i & 0xffff] =
178 reverse_bits(linear2ulaw(i));
179 }
180 } else {
181 /* generating alaw-table */
182 for (i = -32768; i < 32768; i++) {
183 dsp_audio_s16_to_law[i & 0xffff] =
184 reverse_bits(linear2alaw(i));
185 }
186 }
187}
188
189
190/*
191 * the seven bit sample is the number of every second alaw-sample ordered by
192 * aplitude. 0x00 is negative, 0x7f is positive amplitude.
193 */
194u8 dsp_audio_seven2law[128];
195u8 dsp_audio_law2seven[256];
196
197/********************************************************************
198 * generate table for conversion law from/to 7-bit alaw-like sample *
199 ********************************************************************/
200
201void
202dsp_audio_generate_seven(void)
203{
204 int i, j, k;
205 u8 spl;
206 u8 sorted_alaw[256];
207
208 /* generate alaw table, sorted by the linear value */
209 for (i = 0; i < 256; i++) {
210 j = 0;
211 for (k = 0; k < 256; k++) {
212 if (dsp_audio_alaw_to_s32[k]
213 < dsp_audio_alaw_to_s32[i]) {
214 j++;
215 }
216 }
217 sorted_alaw[j] = i;
218 }
219
220 /* generate tabels */
221 for (i = 0; i < 256; i++) {
222 /* spl is the source: the law-sample (converted to alaw) */
223 spl = i;
224 if (dsp_options & DSP_OPT_ULAW)
225 spl = dsp_audio_ulaw_to_alaw[i];
226 /* find the 7-bit-sample */
227 for (j = 0; j < 256; j++) {
228 if (sorted_alaw[j] == spl)
229 break;
230 }
231 /* write 7-bit audio value */
232 dsp_audio_law2seven[i] = j >> 1;
233 }
234 for (i = 0; i < 128; i++) {
235 spl = sorted_alaw[i << 1];
236 if (dsp_options & DSP_OPT_ULAW)
237 spl = dsp_audio_alaw_to_ulaw[spl];
238 dsp_audio_seven2law[i] = spl;
239 }
240}
241
242
243/* mix 2*law -> law */
244u8 dsp_audio_mix_law[65536];
245
246/******************************************************
247 * generate mix table to mix two law samples into one *
248 ******************************************************/
249
250void
251dsp_audio_generate_mix_table(void)
252{
253 int i, j;
254 s32 sample;
255
256 i = 0;
257 while (i < 256) {
258 j = 0;
259 while (j < 256) {
260 sample = dsp_audio_law_to_s32[i];
261 sample += dsp_audio_law_to_s32[j];
262 if (sample > 32767)
263 sample = 32767;
264 if (sample < -32768)
265 sample = -32768;
266 dsp_audio_mix_law[(i<<8)|j] =
267 dsp_audio_s16_to_law[sample & 0xffff];
268 j++;
269 }
270 i++;
271 }
272}
273
274
275/*************************************
276 * generate different volume changes *
277 *************************************/
278
279static u8 dsp_audio_reduce8[256];
280static u8 dsp_audio_reduce7[256];
281static u8 dsp_audio_reduce6[256];
282static u8 dsp_audio_reduce5[256];
283static u8 dsp_audio_reduce4[256];
284static u8 dsp_audio_reduce3[256];
285static u8 dsp_audio_reduce2[256];
286static u8 dsp_audio_reduce1[256];
287static u8 dsp_audio_increase1[256];
288static u8 dsp_audio_increase2[256];
289static u8 dsp_audio_increase3[256];
290static u8 dsp_audio_increase4[256];
291static u8 dsp_audio_increase5[256];
292static u8 dsp_audio_increase6[256];
293static u8 dsp_audio_increase7[256];
294static u8 dsp_audio_increase8[256];
295
296static u8 *dsp_audio_volume_change[16] = {
297 dsp_audio_reduce8,
298 dsp_audio_reduce7,
299 dsp_audio_reduce6,
300 dsp_audio_reduce5,
301 dsp_audio_reduce4,
302 dsp_audio_reduce3,
303 dsp_audio_reduce2,
304 dsp_audio_reduce1,
305 dsp_audio_increase1,
306 dsp_audio_increase2,
307 dsp_audio_increase3,
308 dsp_audio_increase4,
309 dsp_audio_increase5,
310 dsp_audio_increase6,
311 dsp_audio_increase7,
312 dsp_audio_increase8,
313};
314
315void
316dsp_audio_generate_volume_changes(void)
317{
318 register s32 sample;
319 int i;
320 int num[] = { 110, 125, 150, 175, 200, 300, 400, 500 };
321 int denum[] = { 100, 100, 100, 100, 100, 100, 100, 100 };
322
323 i = 0;
324 while (i < 256) {
325 dsp_audio_reduce8[i] = dsp_audio_s16_to_law[
326 (dsp_audio_law_to_s32[i] * denum[7] / num[7]) & 0xffff];
327 dsp_audio_reduce7[i] = dsp_audio_s16_to_law[
328 (dsp_audio_law_to_s32[i] * denum[6] / num[6]) & 0xffff];
329 dsp_audio_reduce6[i] = dsp_audio_s16_to_law[
330 (dsp_audio_law_to_s32[i] * denum[5] / num[5]) & 0xffff];
331 dsp_audio_reduce5[i] = dsp_audio_s16_to_law[
332 (dsp_audio_law_to_s32[i] * denum[4] / num[4]) & 0xffff];
333 dsp_audio_reduce4[i] = dsp_audio_s16_to_law[
334 (dsp_audio_law_to_s32[i] * denum[3] / num[3]) & 0xffff];
335 dsp_audio_reduce3[i] = dsp_audio_s16_to_law[
336 (dsp_audio_law_to_s32[i] * denum[2] / num[2]) & 0xffff];
337 dsp_audio_reduce2[i] = dsp_audio_s16_to_law[
338 (dsp_audio_law_to_s32[i] * denum[1] / num[1]) & 0xffff];
339 dsp_audio_reduce1[i] = dsp_audio_s16_to_law[
340 (dsp_audio_law_to_s32[i] * denum[0] / num[0]) & 0xffff];
341 sample = dsp_audio_law_to_s32[i] * num[0] / denum[0];
342 if (sample < -32768)
343 sample = -32768;
344 else if (sample > 32767)
345 sample = 32767;
346 dsp_audio_increase1[i] = dsp_audio_s16_to_law[sample & 0xffff];
347 sample = dsp_audio_law_to_s32[i] * num[1] / denum[1];
348 if (sample < -32768)
349 sample = -32768;
350 else if (sample > 32767)
351 sample = 32767;
352 dsp_audio_increase2[i] = dsp_audio_s16_to_law[sample & 0xffff];
353 sample = dsp_audio_law_to_s32[i] * num[2] / denum[2];
354 if (sample < -32768)
355 sample = -32768;
356 else if (sample > 32767)
357 sample = 32767;
358 dsp_audio_increase3[i] = dsp_audio_s16_to_law[sample & 0xffff];
359 sample = dsp_audio_law_to_s32[i] * num[3] / denum[3];
360 if (sample < -32768)
361 sample = -32768;
362 else if (sample > 32767)
363 sample = 32767;
364 dsp_audio_increase4[i] = dsp_audio_s16_to_law[sample & 0xffff];
365 sample = dsp_audio_law_to_s32[i] * num[4] / denum[4];
366 if (sample < -32768)
367 sample = -32768;
368 else if (sample > 32767)
369 sample = 32767;
370 dsp_audio_increase5[i] = dsp_audio_s16_to_law[sample & 0xffff];
371 sample = dsp_audio_law_to_s32[i] * num[5] / denum[5];
372 if (sample < -32768)
373 sample = -32768;
374 else if (sample > 32767)
375 sample = 32767;
376 dsp_audio_increase6[i] = dsp_audio_s16_to_law[sample & 0xffff];
377 sample = dsp_audio_law_to_s32[i] * num[6] / denum[6];
378 if (sample < -32768)
379 sample = -32768;
380 else if (sample > 32767)
381 sample = 32767;
382 dsp_audio_increase7[i] = dsp_audio_s16_to_law[sample & 0xffff];
383 sample = dsp_audio_law_to_s32[i] * num[7] / denum[7];
384 if (sample < -32768)
385 sample = -32768;
386 else if (sample > 32767)
387 sample = 32767;
388 dsp_audio_increase8[i] = dsp_audio_s16_to_law[sample & 0xffff];
389
390 i++;
391 }
392}
393
394
395/**************************************
396 * change the volume of the given skb *
397 **************************************/
398
399/* this is a helper function for changing volume of skb. the range may be
400 * -8 to 8, which is a shift to the power of 2. 0 == no volume, 3 == volume*8
401 */
402void
403dsp_change_volume(struct sk_buff *skb, int volume)
404{
405 u8 *volume_change;
406 int i, ii;
407 u8 *p;
408 int shift;
409
410 if (volume == 0)
411 return;
412
413 /* get correct conversion table */
414 if (volume < 0) {
415 shift = volume + 8;
416 if (shift < 0)
417 shift = 0;
418 } else {
419 shift = volume + 7;
420 if (shift > 15)
421 shift = 15;
422 }
423 volume_change = dsp_audio_volume_change[shift];
424 i = 0;
425 ii = skb->len;
426 p = skb->data;
427 /* change volume */
428 while (i < ii) {
429 *p = volume_change[*p];
430 p++;
431 i++;
432 }
433}
434
diff --git a/drivers/isdn/mISDN/dsp_biquad.h b/drivers/isdn/mISDN/dsp_biquad.h
new file mode 100644
index 000000000000..038191bc45f5
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_biquad.h
@@ -0,0 +1,65 @@
1/*
2 * SpanDSP - a series of DSP components for telephony
3 *
4 * biquad.h - General telephony bi-quad section routines (currently this just
5 * handles canonic/type 2 form)
6 *
7 * Written by Steve Underwood <steveu@coppice.org>
8 *
9 * Copyright (C) 2001 Steve Underwood
10 *
11 * All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 *
27 */
28
29struct biquad2_state {
30 int32_t gain;
31 int32_t a1;
32 int32_t a2;
33 int32_t b1;
34 int32_t b2;
35
36 int32_t z1;
37 int32_t z2;
38};
39
40static inline void biquad2_init(struct biquad2_state *bq,
41 int32_t gain, int32_t a1, int32_t a2, int32_t b1, int32_t b2)
42{
43 bq->gain = gain;
44 bq->a1 = a1;
45 bq->a2 = a2;
46 bq->b1 = b1;
47 bq->b2 = b2;
48
49 bq->z1 = 0;
50 bq->z2 = 0;
51}
52
53static inline int16_t biquad2(struct biquad2_state *bq, int16_t sample)
54{
55 int32_t y;
56 int32_t z0;
57
58 z0 = sample*bq->gain + bq->z1*bq->a1 + bq->z2*bq->a2;
59 y = z0 + bq->z1*bq->b1 + bq->z2*bq->b2;
60
61 bq->z2 = bq->z1;
62 bq->z1 = z0 >> 15;
63 y >>= 15;
64 return y;
65}
diff --git a/drivers/isdn/mISDN/dsp_blowfish.c b/drivers/isdn/mISDN/dsp_blowfish.c
new file mode 100644
index 000000000000..18e411e95bba
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_blowfish.c
@@ -0,0 +1,672 @@
1/*
2 * Blowfish encryption/decryption for mISDN_dsp.
3 *
4 * Copyright Andreas Eversberg (jolly@eversberg.eu)
5 *
6 * This software may be used and distributed according to the terms
7 * of the GNU General Public License, incorporated herein by reference.
8 *
9 */
10
11#include <linux/mISDNif.h>
12#include <linux/mISDNdsp.h>
13#include "core.h"
14#include "dsp.h"
15
16/*
17 * how to encode a sample stream to 64-bit blocks that will be encryped
18 *
19 * first of all, data is collected until a block of 9 samples are received.
20 * of course, a packet may have much more than 9 sample, but is may have
21 * not excacly the multiple of 9 samples. if there is a rest, the next
22 * received data will complete the block.
23 *
24 * the block is then converted to 9 uLAW samples without the least sigificant
25 * bit. the result is a 7-bit encoded sample.
26 *
27 * the samples will be reoganised to form 8 bytes of data:
28 * (5(6) means: encoded sample no. 5, bit 6)
29 *
30 * 0(6) 0(5) 0(4) 0(3) 0(2) 0(1) 0(0) 1(6)
31 * 1(5) 1(4) 1(3) 1(2) 1(1) 1(0) 2(6) 2(5)
32 * 2(4) 2(3) 2(2) 2(1) 2(0) 3(6) 3(5) 3(4)
33 * 3(3) 3(2) 3(1) 3(0) 4(6) 4(5) 4(4) 4(3)
34 * 4(2) 4(1) 4(0) 5(6) 5(5) 5(4) 5(3) 5(2)
35 * 5(1) 5(0) 6(6) 6(5) 6(4) 6(3) 6(2) 6(1)
36 * 6(0) 7(6) 7(5) 7(4) 7(3) 7(2) 7(1) 7(0)
37 * 8(6) 8(5) 8(4) 8(3) 8(2) 8(1) 8(0)
38 *
39 * the missing bit 0 of the last byte is filled with some
40 * random noise, to fill all 8 bytes.
41 *
42 * the 8 bytes will be encrypted using blowfish.
43 *
44 * the result will be converted into 9 bytes. the bit 7 is used for
45 * checksumme (CS) for sync (0, 1) and for the last bit:
46 * (5(6) means: crypted byte 5, bit 6)
47 *
48 * 1 0(7) 0(6) 0(5) 0(4) 0(3) 0(2) 0(1)
49 * 0 0(0) 1(7) 1(6) 1(5) 1(4) 1(3) 1(2)
50 * 0 1(1) 1(0) 2(7) 2(6) 2(5) 2(4) 2(3)
51 * 0 2(2) 2(1) 2(0) 3(7) 3(6) 3(5) 3(4)
52 * 0 3(3) 3(2) 3(1) 3(0) 4(7) 4(6) 4(5)
53 * CS 4(4) 4(3) 4(2) 4(1) 4(0) 5(7) 5(6)
54 * CS 5(5) 5(4) 5(3) 5(2) 5(1) 5(0) 6(7)
55 * CS 6(6) 6(5) 6(4) 6(3) 6(2) 6(1) 6(0)
56 * 7(0) 7(6) 7(5) 7(4) 7(3) 7(2) 7(1) 7(0)
57 *
58 * the checksum is used to detect transmission errors and frame drops.
59 *
60 * synchronisation of received block is done by shifting the upper bit of each
61 * byte (bit 7) to a shift register. if the rigister has the first five bits
62 * (10000), this is used to find the sync. only if sync has been found, the
63 * current block of 9 received bytes are decrypted. before that the check
64 * sum is calculated. if it is incorrect the block is dropped.
65 * this will avoid loud noise due to corrupt encrypted data.
66 *
67 * if the last block is corrupt, the current decoded block is repeated
68 * until a valid block has been received.
69 */
70
71/*
72 * some blowfish parts are taken from the
73 * crypto-api for faster implementation
74 */
75
76struct bf_ctx {
77 u32 p[18];
78 u32 s[1024];
79};
80
81static const u32 bf_pbox[16 + 2] = {
82 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
83 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
84 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
85 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
86 0x9216d5d9, 0x8979fb1b,
87};
88
89static const u32 bf_sbox[256 * 4] = {
90 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
91 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
92 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
93 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
94 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
95 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
96 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
97 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
98 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
99 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
100 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
101 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
102 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
103 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
104 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
105 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
106 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
107 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
108 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
109 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
110 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
111 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
112 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
113 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
114 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
115 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
116 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
117 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
118 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
119 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
120 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
121 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
122 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
123 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
124 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
125 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
126 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
127 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
128 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
129 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
130 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
131 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
132 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
133 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
134 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
135 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
136 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
137 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
138 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
139 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
140 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
141 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
142 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
143 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
144 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
145 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
146 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
147 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
148 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
149 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
150 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
151 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
152 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
153 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a,
154 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
155 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
156 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
157 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
158 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
159 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
160 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
161 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
162 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
163 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
164 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
165 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
166 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
167 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
168 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
169 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
170 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
171 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
172 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
173 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
174 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
175 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
176 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
177 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
178 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
179 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
180 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
181 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
182 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
183 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
184 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
185 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
186 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
187 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
188 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
189 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
190 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
191 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
192 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
193 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
194 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
195 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
196 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
197 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
198 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
199 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
200 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
201 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
202 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
203 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
204 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
205 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
206 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
207 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
208 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
209 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
210 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
211 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
212 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
213 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
214 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
215 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
216 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
217 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7,
218 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
219 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
220 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
221 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
222 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
223 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
224 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
225 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
226 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
227 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
228 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
229 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
230 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
231 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
232 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
233 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
234 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
235 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
236 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
237 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
238 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
239 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
240 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
241 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
242 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
243 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
244 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
245 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
246 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
247 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
248 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
249 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
250 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
251 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
252 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
253 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
254 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
255 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
256 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
257 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
258 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
259 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
260 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
261 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
262 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
263 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
264 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
265 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
266 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
267 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
268 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
269 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
270 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
271 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
272 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
273 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
274 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
275 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
276 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
277 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
278 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
279 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
280 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
281 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
282 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
283 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
284 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
285 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
286 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
287 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
288 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
289 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
290 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
291 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
292 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
293 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
294 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
295 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
296 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
297 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
298 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
299 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
300 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
301 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
302 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
303 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
304 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
305 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
306 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
307 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
308 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
309 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
310 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
311 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
312 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
313 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
314 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
315 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
316 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
317 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
318 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
319 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
320 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
321 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
322 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
323 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
324 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
325 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
326 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
327 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
328 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
329 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
330 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
331 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
332 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
333 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
334 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
335 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
336 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
337 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
338 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
339 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
340 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
341 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
342 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
343 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
344 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
345 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6,
346};
347
348/*
349 * Round loop unrolling macros, S is a pointer to a S-Box array
350 * organized in 4 unsigned longs at a row.
351 */
352#define GET32_3(x) (((x) & 0xff))
353#define GET32_2(x) (((x) >> (8)) & (0xff))
354#define GET32_1(x) (((x) >> (16)) & (0xff))
355#define GET32_0(x) (((x) >> (24)) & (0xff))
356
357#define bf_F(x) (((S[GET32_0(x)] + S[256 + GET32_1(x)]) ^ \
358 S[512 + GET32_2(x)]) + S[768 + GET32_3(x)])
359
360#define EROUND(a, b, n) do { b ^= P[n]; a ^= bf_F(b); } while (0)
361#define DROUND(a, b, n) do { a ^= bf_F(b); b ^= P[n]; } while (0)
362
363
364/*
365 * encrypt isdn data frame
366 * every block with 9 samples is encrypted
367 */
368void
369dsp_bf_encrypt(struct dsp *dsp, u8 *data, int len)
370{
371 int i = 0, j = dsp->bf_crypt_pos;
372 u8 *bf_data_in = dsp->bf_data_in;
373 u8 *bf_crypt_out = dsp->bf_crypt_out;
374 u32 *P = dsp->bf_p;
375 u32 *S = dsp->bf_s;
376 u32 yl, yr;
377 u32 cs;
378 u8 nibble;
379
380 while (i < len) {
381 /* collect a block of 9 samples */
382 if (j < 9) {
383 bf_data_in[j] = *data;
384 *data++ = bf_crypt_out[j++];
385 i++;
386 continue;
387 }
388 j = 0;
389 /* transcode 9 samples xlaw to 8 bytes */
390 yl = dsp_audio_law2seven[bf_data_in[0]];
391 yl = (yl<<7) | dsp_audio_law2seven[bf_data_in[1]];
392 yl = (yl<<7) | dsp_audio_law2seven[bf_data_in[2]];
393 yl = (yl<<7) | dsp_audio_law2seven[bf_data_in[3]];
394 nibble = dsp_audio_law2seven[bf_data_in[4]];
395 yr = nibble;
396 yl = (yl<<4) | (nibble>>3);
397 yr = (yr<<7) | dsp_audio_law2seven[bf_data_in[5]];
398 yr = (yr<<7) | dsp_audio_law2seven[bf_data_in[6]];
399 yr = (yr<<7) | dsp_audio_law2seven[bf_data_in[7]];
400 yr = (yr<<7) | dsp_audio_law2seven[bf_data_in[8]];
401 yr = (yr<<1) | (bf_data_in[0] & 1);
402
403 /* fill unused bit with random noise of audio input */
404 /* encrypt */
405
406 EROUND(yr, yl, 0);
407 EROUND(yl, yr, 1);
408 EROUND(yr, yl, 2);
409 EROUND(yl, yr, 3);
410 EROUND(yr, yl, 4);
411 EROUND(yl, yr, 5);
412 EROUND(yr, yl, 6);
413 EROUND(yl, yr, 7);
414 EROUND(yr, yl, 8);
415 EROUND(yl, yr, 9);
416 EROUND(yr, yl, 10);
417 EROUND(yl, yr, 11);
418 EROUND(yr, yl, 12);
419 EROUND(yl, yr, 13);
420 EROUND(yr, yl, 14);
421 EROUND(yl, yr, 15);
422 yl ^= P[16];
423 yr ^= P[17];
424
425 /* calculate 3-bit checksumme */
426 cs = yl ^ (yl>>3) ^ (yl>>6) ^ (yl>>9) ^ (yl>>12) ^ (yl>>15)
427 ^ (yl>>18) ^ (yl>>21) ^ (yl>>24) ^ (yl>>27) ^ (yl>>30)
428 ^ (yr<<2) ^ (yr>>1) ^ (yr>>4) ^ (yr>>7) ^ (yr>>10)
429 ^ (yr>>13) ^ (yr>>16) ^ (yr>>19) ^ (yr>>22) ^ (yr>>25)
430 ^ (yr>>28) ^ (yr>>31);
431
432 /*
433 * transcode 8 crypted bytes to 9 data bytes with sync
434 * and checksum information
435 */
436 bf_crypt_out[0] = (yl>>25) | 0x80;
437 bf_crypt_out[1] = (yl>>18) & 0x7f;
438 bf_crypt_out[2] = (yl>>11) & 0x7f;
439 bf_crypt_out[3] = (yl>>4) & 0x7f;
440 bf_crypt_out[4] = ((yl<<3) & 0x78) | ((yr>>29) & 0x07);
441 bf_crypt_out[5] = ((yr>>22) & 0x7f) | ((cs<<5) & 0x80);
442 bf_crypt_out[6] = ((yr>>15) & 0x7f) | ((cs<<6) & 0x80);
443 bf_crypt_out[7] = ((yr>>8) & 0x7f) | (cs<<7);
444 bf_crypt_out[8] = yr;
445 }
446
447 /* write current count */
448 dsp->bf_crypt_pos = j;
449
450}
451
452
453/*
454 * decrypt isdn data frame
455 * every block with 9 bytes is decrypted
456 */
457void
458dsp_bf_decrypt(struct dsp *dsp, u8 *data, int len)
459{
460 int i = 0;
461 u8 j = dsp->bf_decrypt_in_pos;
462 u8 k = dsp->bf_decrypt_out_pos;
463 u8 *bf_crypt_inring = dsp->bf_crypt_inring;
464 u8 *bf_data_out = dsp->bf_data_out;
465 u16 sync = dsp->bf_sync;
466 u32 *P = dsp->bf_p;
467 u32 *S = dsp->bf_s;
468 u32 yl, yr;
469 u8 nibble;
470 u8 cs, cs0, cs1, cs2;
471
472 while (i < len) {
473 /*
474 * shift upper bit and rotate data to buffer ring
475 * send current decrypted data
476 */
477 sync = (sync<<1) | ((*data)>>7);
478 bf_crypt_inring[j++ & 15] = *data;
479 *data++ = bf_data_out[k++];
480 i++;
481 if (k == 9)
482 k = 0; /* repeat if no sync has been found */
483 /* check if not in sync */
484 if ((sync&0x1f0) != 0x100)
485 continue;
486 j -= 9;
487 /* transcode receive data to 64 bit block of encrypted data */
488 yl = bf_crypt_inring[j++ & 15];
489 yl = (yl<<7) | bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
490 yl = (yl<<7) | bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
491 yl = (yl<<7) | bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
492 nibble = bf_crypt_inring[j++ & 15]; /* bit7 = 0 */
493 yr = nibble;
494 yl = (yl<<4) | (nibble>>3);
495 cs2 = bf_crypt_inring[j++ & 15];
496 yr = (yr<<7) | (cs2 & 0x7f);
497 cs1 = bf_crypt_inring[j++ & 15];
498 yr = (yr<<7) | (cs1 & 0x7f);
499 cs0 = bf_crypt_inring[j++ & 15];
500 yr = (yr<<7) | (cs0 & 0x7f);
501 yr = (yr<<8) | bf_crypt_inring[j++ & 15];
502
503 /* calculate 3-bit checksumme */
504 cs = yl ^ (yl>>3) ^ (yl>>6) ^ (yl>>9) ^ (yl>>12) ^ (yl>>15)
505 ^ (yl>>18) ^ (yl>>21) ^ (yl>>24) ^ (yl>>27) ^ (yl>>30)
506 ^ (yr<<2) ^ (yr>>1) ^ (yr>>4) ^ (yr>>7) ^ (yr>>10)
507 ^ (yr>>13) ^ (yr>>16) ^ (yr>>19) ^ (yr>>22) ^ (yr>>25)
508 ^ (yr>>28) ^ (yr>>31);
509
510 /* check if frame is valid */
511 if ((cs&0x7) != (((cs2>>5)&4) | ((cs1>>6)&2) | (cs0 >> 7))) {
512 if (dsp_debug & DEBUG_DSP_BLOWFISH)
513 printk(KERN_DEBUG
514 "DSP BLOWFISH: received corrupt frame, "
515 "checksumme is not correct\n");
516 continue;
517 }
518
519 /* decrypt */
520 yr ^= P[17];
521 yl ^= P[16];
522 DROUND(yl, yr, 15);
523 DROUND(yr, yl, 14);
524 DROUND(yl, yr, 13);
525 DROUND(yr, yl, 12);
526 DROUND(yl, yr, 11);
527 DROUND(yr, yl, 10);
528 DROUND(yl, yr, 9);
529 DROUND(yr, yl, 8);
530 DROUND(yl, yr, 7);
531 DROUND(yr, yl, 6);
532 DROUND(yl, yr, 5);
533 DROUND(yr, yl, 4);
534 DROUND(yl, yr, 3);
535 DROUND(yr, yl, 2);
536 DROUND(yl, yr, 1);
537 DROUND(yr, yl, 0);
538
539 /* transcode 8 crypted bytes to 9 sample bytes */
540 bf_data_out[0] = dsp_audio_seven2law[(yl>>25) & 0x7f];
541 bf_data_out[1] = dsp_audio_seven2law[(yl>>18) & 0x7f];
542 bf_data_out[2] = dsp_audio_seven2law[(yl>>11) & 0x7f];
543 bf_data_out[3] = dsp_audio_seven2law[(yl>>4) & 0x7f];
544 bf_data_out[4] = dsp_audio_seven2law[((yl<<3) & 0x78) |
545 ((yr>>29) & 0x07)];
546
547 bf_data_out[5] = dsp_audio_seven2law[(yr>>22) & 0x7f];
548 bf_data_out[6] = dsp_audio_seven2law[(yr>>15) & 0x7f];
549 bf_data_out[7] = dsp_audio_seven2law[(yr>>8) & 0x7f];
550 bf_data_out[8] = dsp_audio_seven2law[(yr>>1) & 0x7f];
551 k = 0; /* start with new decoded frame */
552 }
553
554 /* write current count and sync */
555 dsp->bf_decrypt_in_pos = j;
556 dsp->bf_decrypt_out_pos = k;
557 dsp->bf_sync = sync;
558}
559
560
561/* used to encrypt S and P boxes */
562static inline void
563encrypt_block(const u32 *P, const u32 *S, u32 *dst, u32 *src)
564{
565 u32 yl = src[0];
566 u32 yr = src[1];
567
568 EROUND(yr, yl, 0);
569 EROUND(yl, yr, 1);
570 EROUND(yr, yl, 2);
571 EROUND(yl, yr, 3);
572 EROUND(yr, yl, 4);
573 EROUND(yl, yr, 5);
574 EROUND(yr, yl, 6);
575 EROUND(yl, yr, 7);
576 EROUND(yr, yl, 8);
577 EROUND(yl, yr, 9);
578 EROUND(yr, yl, 10);
579 EROUND(yl, yr, 11);
580 EROUND(yr, yl, 12);
581 EROUND(yl, yr, 13);
582 EROUND(yr, yl, 14);
583 EROUND(yl, yr, 15);
584
585 yl ^= P[16];
586 yr ^= P[17];
587
588 dst[0] = yr;
589 dst[1] = yl;
590}
591
592/*
593 * initialize the dsp for encryption and decryption using the same key
594 * Calculates the blowfish S and P boxes for encryption and decryption.
595 * The margin of keylen must be 4-56 bytes.
596 * returns 0 if ok.
597 */
598int
599dsp_bf_init(struct dsp *dsp, const u8 *key, uint keylen)
600{
601 short i, j, count;
602 u32 data[2], temp;
603 u32 *P = (u32 *)dsp->bf_p;
604 u32 *S = (u32 *)dsp->bf_s;
605
606 if (keylen < 4 || keylen > 56)
607 return 1;
608
609 /* Set dsp states */
610 i = 0;
611 while (i < 9) {
612 dsp->bf_crypt_out[i] = 0xff;
613 dsp->bf_data_out[i] = dsp_silence;
614 i++;
615 }
616 dsp->bf_crypt_pos = 0;
617 dsp->bf_decrypt_in_pos = 0;
618 dsp->bf_decrypt_out_pos = 0;
619 dsp->bf_sync = 0x1ff;
620 dsp->bf_enable = 1;
621
622 /* Copy the initialization s-boxes */
623 for (i = 0, count = 0; i < 256; i++)
624 for (j = 0; j < 4; j++, count++)
625 S[count] = bf_sbox[count];
626
627 /* Set the p-boxes */
628 for (i = 0; i < 16 + 2; i++)
629 P[i] = bf_pbox[i];
630
631 /* Actual subkey generation */
632 for (j = 0, i = 0; i < 16 + 2; i++) {
633 temp = (((u32)key[j] << 24) |
634 ((u32)key[(j + 1) % keylen] << 16) |
635 ((u32)key[(j + 2) % keylen] << 8) |
636 ((u32)key[(j + 3) % keylen]));
637
638 P[i] = P[i] ^ temp;
639 j = (j + 4) % keylen;
640 }
641
642 data[0] = 0x00000000;
643 data[1] = 0x00000000;
644
645 for (i = 0; i < 16 + 2; i += 2) {
646 encrypt_block(P, S, data, data);
647
648 P[i] = data[0];
649 P[i + 1] = data[1];
650 }
651
652 for (i = 0; i < 4; i++) {
653 for (j = 0, count = i * 256; j < 256; j += 2, count += 2) {
654 encrypt_block(P, S, data, data);
655
656 S[count] = data[0];
657 S[count + 1] = data[1];
658 }
659 }
660
661 return 0;
662}
663
664
665/*
666 * turn encryption off
667 */
668void
669dsp_bf_cleanup(struct dsp *dsp)
670{
671 dsp->bf_enable = 0;
672}
diff --git a/drivers/isdn/mISDN/dsp_cmx.c b/drivers/isdn/mISDN/dsp_cmx.c
new file mode 100644
index 000000000000..e92b1ba4b45e
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_cmx.c
@@ -0,0 +1,1886 @@
1/*
2 * Audio crossconnecting/conferrencing (hardware level).
3 *
4 * Copyright 2002 by Andreas Eversberg (jolly@eversberg.eu)
5 *
6 * This software may be used and distributed according to the terms
7 * of the GNU General Public License, incorporated herein by reference.
8 *
9 */
10
11/*
12 * The process of adding and removing parties to/from a conference:
13 *
14 * There is a chain of struct dsp_conf which has one or more members in a chain
15 * of struct dsp_conf_member.
16 *
17 * After a party is added, the conference is checked for hardware capability.
18 * Also if a party is removed, the conference is checked again.
19 *
20 * There are 3 different solutions: -1 = software, 0 = hardware-crossconnect
21 * 1-n = hardware-conference. The n will give the conference number.
22 *
23 * Depending on the change after removal or insertion of a party, hardware
24 * commands are given.
25 *
26 * The current solution is stored within the struct dsp_conf entry.
27 */
28
29/*
30 * HOW THE CMX WORKS:
31 *
32 * There are 3 types of interaction: One member is alone, in this case only
33 * data flow from upper to lower layer is done.
34 * Two members will also exchange their data so they are crossconnected.
35 * Three or more members will be added in a conference and will hear each
36 * other but will not receive their own speech (echo) if not enabled.
37 *
38 * Features of CMX are:
39 * - Crossconnecting or even conference, if more than two members are together.
40 * - Force mixing of transmit data with other crossconnect/conference members.
41 * - Echo generation to benchmark the delay of audio processing.
42 * - Use hardware to minimize cpu load, disable FIFO load and minimize delay.
43 * - Dejittering and clock generation.
44 *
45 * There are 2 buffers:
46 *
47 *
48 * RX-Buffer
49 * R W
50 * | |
51 * ----------------+-------------+-------------------
52 *
53 * The rx-buffer is a ring buffer used to store the received data for each
54 * individual member. This is only the case if data needs to be dejittered
55 * or in case of a conference where different clocks require reclocking.
56 * The transmit-clock (R) will read the buffer.
57 * If the clock overruns the write-pointer, we will have a buffer underrun.
58 * If the write pointer always has a certain distance from the transmit-
59 * clock, we will have a delay. The delay will dynamically be increased and
60 * reduced.
61 *
62 *
63 * TX-Buffer
64 * R W
65 * | |
66 * -----------------+--------+-----------------------
67 *
68 * The tx-buffer is a ring buffer to queue the transmit data from user space
69 * until it will be mixed or sent. There are two pointers, R and W. If the write
70 * pointer W would reach or overrun R, the buffer would overrun. In this case
71 * (some) data is dropped so that it will not overrun.
72 * Additionally a dynamic dejittering can be enabled. this allows data from
73 * user space that have jitter and different clock source.
74 *
75 *
76 * Clock:
77 *
78 * A Clock is not required, if the data source has exactly one clock. In this
79 * case the data source is forwarded to the destination.
80 *
81 * A Clock is required, because the data source
82 * - has multiple clocks.
83 * - has no usable clock due to jitter or packet loss (VoIP).
84 * In this case the system's clock is used. The clock resolution depends on
85 * the jiffie resolution.
86 *
87 * If a member joins a conference:
88 *
89 * - If a member joins, its rx_buff is set to silence and change read pointer
90 * to transmit clock.
91 *
92 * The procedure of received data from card is explained in cmx_receive.
93 * The procedure of received data from user space is explained in cmx_transmit.
94 * The procedure of transmit data to card is cmx_send.
95 *
96 *
97 * Interaction with other features:
98 *
99 * DTMF:
100 * DTMF decoding is done before the data is crossconnected.
101 *
102 * Volume change:
103 * Changing rx-volume is done before the data is crossconnected. The tx-volume
104 * must be changed whenever data is transmitted to the card by the cmx.
105 *
106 * Tones:
107 * If a tone is enabled, it will be processed whenever data is transmitted to
108 * the card. It will replace the tx-data from the user space.
109 * If tones are generated by hardware, this conference member is removed for
110 * this time.
111 *
112 * Disable rx-data:
113 * If cmx is realized in hardware, rx data will be disabled if requested by
114 * the upper layer. If dtmf decoding is done by software and enabled, rx data
115 * will not be diabled but blocked to the upper layer.
116 *
117 * HFC conference engine:
118 * If it is possible to realize all features using hardware, hardware will be
119 * used if not forbidden by control command. Disabling rx-data provides
120 * absolutely traffic free audio processing. (except for the quick 1-frame
121 * upload of a tone loop, only once for a new tone)
122 *
123 */
124
125/* delay.h is required for hw_lock.h */
126
127#include <linux/delay.h>
128#include <linux/mISDNif.h>
129#include <linux/mISDNdsp.h>
130#include "core.h"
131#include "dsp.h"
132/*
133 * debugging of multi party conference,
134 * by using conference even with two members
135 */
136
137/* #define CMX_CONF_DEBUG */
138
139/*#define CMX_DEBUG * massive read/write pointer output */
140/*#define CMX_TX_DEBUG * massive read/write on tx-buffer with content */
141
142static inline int
143count_list_member(struct list_head *head)
144{
145 int cnt = 0;
146 struct list_head *m;
147
148 list_for_each(m, head)
149 cnt++;
150 return cnt;
151}
152
153/*
154 * debug cmx memory structure
155 */
156void
157dsp_cmx_debug(struct dsp *dsp)
158{
159 struct dsp_conf *conf;
160 struct dsp_conf_member *member;
161 struct dsp *odsp;
162
163 printk(KERN_DEBUG "-----Current DSP\n");
164 list_for_each_entry(odsp, &dsp_ilist, list) {
165 printk(KERN_DEBUG "* %s echo=%d txmix=%d",
166 odsp->name, odsp->echo, odsp->tx_mix);
167 if (odsp->conf)
168 printk(" (Conf %d)", odsp->conf->id);
169 if (dsp == odsp)
170 printk(" *this*");
171 printk("\n");
172 }
173 printk(KERN_DEBUG "-----Current Conf:\n");
174 list_for_each_entry(conf, &conf_ilist, list) {
175 printk(KERN_DEBUG "* Conf %d (%p)\n", conf->id, conf);
176 list_for_each_entry(member, &conf->mlist, list) {
177 printk(KERN_DEBUG
178 " - member = %s (slot_tx %d, bank_tx %d, "
179 "slot_rx %d, bank_rx %d hfc_conf %d)%s\n",
180 member->dsp->name, member->dsp->pcm_slot_tx,
181 member->dsp->pcm_bank_tx, member->dsp->pcm_slot_rx,
182 member->dsp->pcm_bank_rx, member->dsp->hfc_conf,
183 (member->dsp == dsp) ? " *this*" : "");
184 }
185 }
186 printk(KERN_DEBUG "-----end\n");
187}
188
189/*
190 * search conference
191 */
192static struct dsp_conf *
193dsp_cmx_search_conf(u32 id)
194{
195 struct dsp_conf *conf;
196
197 if (!id) {
198 printk(KERN_WARNING "%s: conference ID is 0.\n", __func__);
199 return NULL;
200 }
201
202 /* search conference */
203 list_for_each_entry(conf, &conf_ilist, list)
204 if (conf->id == id)
205 return conf;
206
207 return NULL;
208}
209
210
211/*
212 * add member to conference
213 */
214static int
215dsp_cmx_add_conf_member(struct dsp *dsp, struct dsp_conf *conf)
216{
217 struct dsp_conf_member *member;
218
219 if (!conf || !dsp) {
220 printk(KERN_WARNING "%s: conf or dsp is 0.\n", __func__);
221 return -EINVAL;
222 }
223 if (dsp->member) {
224 printk(KERN_WARNING "%s: dsp is already member in a conf.\n",
225 __func__);
226 return -EINVAL;
227 }
228
229 if (dsp->conf) {
230 printk(KERN_WARNING "%s: dsp is already in a conf.\n",
231 __func__);
232 return -EINVAL;
233 }
234
235 member = kzalloc(sizeof(struct dsp_conf_member), GFP_ATOMIC);
236 if (!member) {
237 printk(KERN_ERR "kmalloc struct dsp_conf_member failed\n");
238 return -ENOMEM;
239 }
240 member->dsp = dsp;
241 /* clear rx buffer */
242 memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff));
243 dsp->rx_init = 1; /* rx_W and rx_R will be adjusted on first frame */
244 dsp->rx_W = 0;
245 dsp->rx_R = 0;
246
247 list_add_tail(&member->list, &conf->mlist);
248
249 dsp->conf = conf;
250 dsp->member = member;
251
252 return 0;
253}
254
255
256/*
257 * del member from conference
258 */
259int
260dsp_cmx_del_conf_member(struct dsp *dsp)
261{
262 struct dsp_conf_member *member;
263
264 if (!dsp) {
265 printk(KERN_WARNING "%s: dsp is 0.\n",
266 __func__);
267 return -EINVAL;
268 }
269
270 if (!dsp->conf) {
271 printk(KERN_WARNING "%s: dsp is not in a conf.\n",
272 __func__);
273 return -EINVAL;
274 }
275
276 if (list_empty(&dsp->conf->mlist)) {
277 printk(KERN_WARNING "%s: dsp has linked an empty conf.\n",
278 __func__);
279 return -EINVAL;
280 }
281
282 /* find us in conf */
283 list_for_each_entry(member, &dsp->conf->mlist, list) {
284 if (member->dsp == dsp) {
285 list_del(&member->list);
286 dsp->conf = NULL;
287 dsp->member = NULL;
288 kfree(member);
289 return 0;
290 }
291 }
292 printk(KERN_WARNING
293 "%s: dsp is not present in its own conf_meber list.\n",
294 __func__);
295
296 return -EINVAL;
297}
298
299
300/*
301 * new conference
302 */
303static struct dsp_conf
304*dsp_cmx_new_conf(u32 id)
305{
306 struct dsp_conf *conf;
307
308 if (!id) {
309 printk(KERN_WARNING "%s: id is 0.\n",
310 __func__);
311 return NULL;
312 }
313
314 conf = kzalloc(sizeof(struct dsp_conf), GFP_ATOMIC);
315 if (!conf) {
316 printk(KERN_ERR "kmalloc struct dsp_conf failed\n");
317 return NULL;
318 }
319 INIT_LIST_HEAD(&conf->mlist);
320 conf->id = id;
321
322 list_add_tail(&conf->list, &conf_ilist);
323
324 return conf;
325}
326
327
328/*
329 * del conference
330 */
331int
332dsp_cmx_del_conf(struct dsp_conf *conf)
333{
334 if (!conf) {
335 printk(KERN_WARNING "%s: conf is null.\n",
336 __func__);
337 return -EINVAL;
338 }
339
340 if (!list_empty(&conf->mlist)) {
341 printk(KERN_WARNING "%s: conf not empty.\n",
342 __func__);
343 return -EINVAL;
344 }
345 list_del(&conf->list);
346 kfree(conf);
347
348 return 0;
349}
350
351
352/*
353 * send HW message to hfc card
354 */
355static void
356dsp_cmx_hw_message(struct dsp *dsp, u32 message, u32 param1, u32 param2,
357 u32 param3, u32 param4)
358{
359 struct mISDN_ctrl_req cq;
360
361 memset(&cq, 0, sizeof(cq));
362 cq.op = message;
363 cq.p1 = param1 | (param2 << 8);
364 cq.p2 = param3 | (param4 << 8);
365 if (dsp->ch.peer)
366 dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq);
367}
368
369
370/*
371 * do hardware update and set the software/hardware flag
372 *
373 * either a conference or a dsp instance can be given
374 * if only dsp instance is given, the instance is not associated with a conf
375 * and therefore removed. if a conference is given, the dsp is expected to
376 * be member of that conference.
377 */
378void
379dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp)
380{
381 struct dsp_conf_member *member, *nextm;
382 struct dsp *finddsp;
383 int memb = 0, i, ii, i1, i2;
384 int freeunits[8];
385 u_char freeslots[256];
386 int same_hfc = -1, same_pcm = -1, current_conf = -1,
387 all_conf = 1;
388
389 /* dsp gets updated (no conf) */
390 if (!conf) {
391 if (!dsp)
392 return;
393 if (dsp_debug & DEBUG_DSP_CMX)
394 printk(KERN_DEBUG "%s checking dsp %s\n",
395 __func__, dsp->name);
396one_member:
397 /* remove HFC conference if enabled */
398 if (dsp->hfc_conf >= 0) {
399 if (dsp_debug & DEBUG_DSP_CMX)
400 printk(KERN_DEBUG
401 "%s removing %s from HFC conf %d "
402 "because dsp is split\n", __func__,
403 dsp->name, dsp->hfc_conf);
404 dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_CONF_SPLIT,
405 0, 0, 0, 0);
406 dsp->hfc_conf = -1;
407 }
408 /* process hw echo */
409 if (dsp->features.pcm_banks < 1)
410 return;
411 if (!dsp->echo) {
412 /* NO ECHO: remove PCM slot if assigned */
413 if (dsp->pcm_slot_tx >= 0 || dsp->pcm_slot_rx >= 0) {
414 if (dsp_debug & DEBUG_DSP_CMX)
415 printk(KERN_DEBUG "%s removing %s from"
416 " PCM slot %d (TX) %d (RX) because"
417 " dsp is split (no echo)\n",
418 __func__, dsp->name,
419 dsp->pcm_slot_tx, dsp->pcm_slot_rx);
420 dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_DISC,
421 0, 0, 0, 0);
422 dsp->pcm_slot_tx = -1;
423 dsp->pcm_bank_tx = -1;
424 dsp->pcm_slot_rx = -1;
425 dsp->pcm_bank_rx = -1;
426 }
427 return;
428 }
429 /* ECHO: already echo */
430 if (dsp->pcm_slot_tx >= 0 && dsp->pcm_slot_rx < 0 &&
431 dsp->pcm_bank_tx == 2 && dsp->pcm_bank_rx == 2)
432 return;
433 /* ECHO: if slot already assigned */
434 if (dsp->pcm_slot_tx >= 0) {
435 dsp->pcm_slot_rx = dsp->pcm_slot_tx;
436 dsp->pcm_bank_tx = 2; /* 2 means loop */
437 dsp->pcm_bank_rx = 2;
438 if (dsp_debug & DEBUG_DSP_CMX)
439 printk(KERN_DEBUG
440 "%s refresh %s for echo using slot %d\n",
441 __func__, dsp->name,
442 dsp->pcm_slot_tx);
443 dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_CONN,
444 dsp->pcm_slot_tx, 2, dsp->pcm_slot_rx, 2);
445 return;
446 }
447 /* ECHO: find slot */
448 dsp->pcm_slot_tx = -1;
449 dsp->pcm_slot_rx = -1;
450 memset(freeslots, 1, sizeof(freeslots));
451 list_for_each_entry(finddsp, &dsp_ilist, list) {
452 if (finddsp->features.pcm_id == dsp->features.pcm_id) {
453 if (finddsp->pcm_slot_rx >= 0 &&
454 finddsp->pcm_slot_rx < sizeof(freeslots))
455 freeslots[finddsp->pcm_slot_tx] = 0;
456 if (finddsp->pcm_slot_tx >= 0 &&
457 finddsp->pcm_slot_tx < sizeof(freeslots))
458 freeslots[finddsp->pcm_slot_rx] = 0;
459 }
460 }
461 i = 0;
462 ii = dsp->features.pcm_slots;
463 while (i < ii) {
464 if (freeslots[i])
465 break;
466 i++;
467 }
468 if (i == ii) {
469 if (dsp_debug & DEBUG_DSP_CMX)
470 printk(KERN_DEBUG
471 "%s no slot available for echo\n",
472 __func__);
473 /* no more slots available */
474 return;
475 }
476 /* assign free slot */
477 dsp->pcm_slot_tx = i;
478 dsp->pcm_slot_rx = i;
479 dsp->pcm_bank_tx = 2; /* loop */
480 dsp->pcm_bank_rx = 2;
481 if (dsp_debug & DEBUG_DSP_CMX)
482 printk(KERN_DEBUG
483 "%s assign echo for %s using slot %d\n",
484 __func__, dsp->name, dsp->pcm_slot_tx);
485 dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_CONN,
486 dsp->pcm_slot_tx, 2, dsp->pcm_slot_rx, 2);
487 return;
488 }
489
490 /* conf gets updated (all members) */
491 if (dsp_debug & DEBUG_DSP_CMX)
492 printk(KERN_DEBUG "%s checking conference %d\n",
493 __func__, conf->id);
494
495 if (list_empty(&conf->mlist)) {
496 printk(KERN_ERR "%s: conference whithout members\n",
497 __func__);
498 return;
499 }
500 member = list_entry(conf->mlist.next, struct dsp_conf_member, list);
501 same_hfc = member->dsp->features.hfc_id;
502 same_pcm = member->dsp->features.pcm_id;
503 /* check all members in our conference */
504 list_for_each_entry(member, &conf->mlist, list) {
505 /* check if member uses mixing */
506 if (member->dsp->tx_mix) {
507 if (dsp_debug & DEBUG_DSP_CMX)
508 printk(KERN_DEBUG
509 "%s dsp %s cannot form a conf, because "
510 "tx_mix is turned on\n", __func__,
511 member->dsp->name);
512conf_software:
513 list_for_each_entry(member, &conf->mlist, list) {
514 dsp = member->dsp;
515 /* remove HFC conference if enabled */
516 if (dsp->hfc_conf >= 0) {
517 if (dsp_debug & DEBUG_DSP_CMX)
518 printk(KERN_DEBUG
519 "%s removing %s from HFC "
520 "conf %d because not "
521 "possible with hardware\n",
522 __func__,
523 dsp->name,
524 dsp->hfc_conf);
525 dsp_cmx_hw_message(dsp,
526 MISDN_CTRL_HFC_CONF_SPLIT,
527 0, 0, 0, 0);
528 dsp->hfc_conf = -1;
529 }
530 /* remove PCM slot if assigned */
531 if (dsp->pcm_slot_tx >= 0 ||
532 dsp->pcm_slot_rx >= 0) {
533 if (dsp_debug & DEBUG_DSP_CMX)
534 printk(KERN_DEBUG "%s removing "
535 "%s from PCM slot %d (TX)"
536 " slot %d (RX) because not"
537 " possible with hardware\n",
538 __func__,
539 dsp->name,
540 dsp->pcm_slot_tx,
541 dsp->pcm_slot_rx);
542 dsp_cmx_hw_message(dsp,
543 MISDN_CTRL_HFC_PCM_DISC,
544 0, 0, 0, 0);
545 dsp->pcm_slot_tx = -1;
546 dsp->pcm_bank_tx = -1;
547 dsp->pcm_slot_rx = -1;
548 dsp->pcm_bank_rx = -1;
549 }
550 }
551 conf->hardware = 0;
552 conf->software = 1;
553 return;
554 }
555 /* check if member has echo turned on */
556 if (member->dsp->echo) {
557 if (dsp_debug & DEBUG_DSP_CMX)
558 printk(KERN_DEBUG
559 "%s dsp %s cannot form a conf, because "
560 "echo is turned on\n", __func__,
561 member->dsp->name);
562 goto conf_software;
563 }
564 /* check if member has tx_mix turned on */
565 if (member->dsp->tx_mix) {
566 if (dsp_debug & DEBUG_DSP_CMX)
567 printk(KERN_DEBUG
568 "%s dsp %s cannot form a conf, because "
569 "tx_mix is turned on\n",
570 __func__, member->dsp->name);
571 goto conf_software;
572 }
573 /* check if member changes volume at an not suppoted level */
574 if (member->dsp->tx_volume) {
575 if (dsp_debug & DEBUG_DSP_CMX)
576 printk(KERN_DEBUG
577 "%s dsp %s cannot form a conf, because "
578 "tx_volume is changed\n",
579 __func__, member->dsp->name);
580 goto conf_software;
581 }
582 if (member->dsp->rx_volume) {
583 if (dsp_debug & DEBUG_DSP_CMX)
584 printk(KERN_DEBUG
585 "%s dsp %s cannot form a conf, because "
586 "rx_volume is changed\n",
587 __func__, member->dsp->name);
588 goto conf_software;
589 }
590 /* check if tx-data turned on */
591 if (member->dsp->tx_data) {
592 if (dsp_debug & DEBUG_DSP_CMX)
593 printk(KERN_DEBUG
594 "%s dsp %s cannot form a conf, because "
595 "tx_data is turned on\n",
596 __func__, member->dsp->name);
597 goto conf_software;
598 }
599 /* check if pipeline exists */
600 if (member->dsp->pipeline.inuse) {
601 if (dsp_debug & DEBUG_DSP_CMX)
602 printk(KERN_DEBUG
603 "%s dsp %s cannot form a conf, because "
604 "pipeline exists\n", __func__,
605 member->dsp->name);
606 goto conf_software;
607 }
608 /* check if encryption is enabled */
609 if (member->dsp->bf_enable) {
610 if (dsp_debug & DEBUG_DSP_CMX)
611 printk(KERN_DEBUG "%s dsp %s cannot form a "
612 "conf, because encryption is enabled\n",
613 __func__, member->dsp->name);
614 goto conf_software;
615 }
616 /* check if member is on a card with PCM support */
617 if (member->dsp->features.pcm_id < 0) {
618 if (dsp_debug & DEBUG_DSP_CMX)
619 printk(KERN_DEBUG
620 "%s dsp %s cannot form a conf, because "
621 "dsp has no PCM bus\n",
622 __func__, member->dsp->name);
623 goto conf_software;
624 }
625 /* check if relations are on the same PCM bus */
626 if (member->dsp->features.pcm_id != same_pcm) {
627 if (dsp_debug & DEBUG_DSP_CMX)
628 printk(KERN_DEBUG
629 "%s dsp %s cannot form a conf, because "
630 "dsp is on a different PCM bus than the "
631 "first dsp\n",
632 __func__, member->dsp->name);
633 goto conf_software;
634 }
635 /* determine if members are on the same hfc chip */
636 if (same_hfc != member->dsp->features.hfc_id)
637 same_hfc = -1;
638 /* if there are members already in a conference */
639 if (current_conf < 0 && member->dsp->hfc_conf >= 0)
640 current_conf = member->dsp->hfc_conf;
641 /* if any member is not in a conference */
642 if (member->dsp->hfc_conf < 0)
643 all_conf = 0;
644
645 memb++;
646 }
647
648 /* if no member, this is an error */
649 if (memb < 1)
650 return;
651
652 /* one member */
653 if (memb == 1) {
654 if (dsp_debug & DEBUG_DSP_CMX)
655 printk(KERN_DEBUG
656 "%s conf %d cannot form a HW conference, "
657 "because dsp is alone\n", __func__, conf->id);
658 conf->hardware = 0;
659 conf->software = 0;
660 member = list_entry(conf->mlist.next, struct dsp_conf_member,
661 list);
662 dsp = member->dsp;
663 goto one_member;
664 }
665
666 /*
667 * ok, now we are sure that all members are on the same pcm.
668 * now we will see if we have only two members, so we can do
669 * crossconnections, which don't have any limitations.
670 */
671
672 /* if we have only two members */
673 if (memb == 2) {
674 member = list_entry(conf->mlist.next, struct dsp_conf_member,
675 list);
676 nextm = list_entry(member->list.next, struct dsp_conf_member,
677 list);
678 /* remove HFC conference if enabled */
679 if (member->dsp->hfc_conf >= 0) {
680 if (dsp_debug & DEBUG_DSP_CMX)
681 printk(KERN_DEBUG
682 "%s removing %s from HFC conf %d because "
683 "two parties require only a PCM slot\n",
684 __func__, member->dsp->name,
685 member->dsp->hfc_conf);
686 dsp_cmx_hw_message(member->dsp,
687 MISDN_CTRL_HFC_CONF_SPLIT, 0, 0, 0, 0);
688 member->dsp->hfc_conf = -1;
689 }
690 if (nextm->dsp->hfc_conf >= 0) {
691 if (dsp_debug & DEBUG_DSP_CMX)
692 printk(KERN_DEBUG
693 "%s removing %s from HFC conf %d because "
694 "two parties require only a PCM slot\n",
695 __func__, nextm->dsp->name,
696 nextm->dsp->hfc_conf);
697 dsp_cmx_hw_message(nextm->dsp,
698 MISDN_CTRL_HFC_CONF_SPLIT, 0, 0, 0, 0);
699 nextm->dsp->hfc_conf = -1;
700 }
701 /* if members have two banks (and not on the same chip) */
702 if (member->dsp->features.pcm_banks > 1 &&
703 nextm->dsp->features.pcm_banks > 1 &&
704 member->dsp->features.hfc_id !=
705 nextm->dsp->features.hfc_id) {
706 /* if both members have same slots with crossed banks */
707 if (member->dsp->pcm_slot_tx >= 0 &&
708 member->dsp->pcm_slot_rx >= 0 &&
709 nextm->dsp->pcm_slot_tx >= 0 &&
710 nextm->dsp->pcm_slot_rx >= 0 &&
711 nextm->dsp->pcm_slot_tx ==
712 member->dsp->pcm_slot_rx &&
713 nextm->dsp->pcm_slot_rx ==
714 member->dsp->pcm_slot_tx &&
715 nextm->dsp->pcm_slot_tx ==
716 member->dsp->pcm_slot_tx &&
717 member->dsp->pcm_bank_tx !=
718 member->dsp->pcm_bank_rx &&
719 nextm->dsp->pcm_bank_tx !=
720 nextm->dsp->pcm_bank_rx) {
721 /* all members have same slot */
722 if (dsp_debug & DEBUG_DSP_CMX)
723 printk(KERN_DEBUG
724 "%s dsp %s & %s stay joined on "
725 "PCM slot %d bank %d (TX) bank %d "
726 "(RX) (on different chips)\n",
727 __func__,
728 member->dsp->name,
729 nextm->dsp->name,
730 member->dsp->pcm_slot_tx,
731 member->dsp->pcm_bank_tx,
732 member->dsp->pcm_bank_rx);
733 conf->hardware = 0;
734 conf->software = 1;
735 return;
736 }
737 /* find a new slot */
738 memset(freeslots, 1, sizeof(freeslots));
739 list_for_each_entry(dsp, &dsp_ilist, list) {
740 if (dsp != member->dsp &&
741 dsp != nextm->dsp &&
742 member->dsp->features.pcm_id ==
743 dsp->features.pcm_id) {
744 if (dsp->pcm_slot_rx >= 0 &&
745 dsp->pcm_slot_rx <
746 sizeof(freeslots))
747 freeslots[dsp->pcm_slot_tx] = 0;
748 if (dsp->pcm_slot_tx >= 0 &&
749 dsp->pcm_slot_tx <
750 sizeof(freeslots))
751 freeslots[dsp->pcm_slot_rx] = 0;
752 }
753 }
754 i = 0;
755 ii = member->dsp->features.pcm_slots;
756 while (i < ii) {
757 if (freeslots[i])
758 break;
759 i++;
760 }
761 if (i == ii) {
762 if (dsp_debug & DEBUG_DSP_CMX)
763 printk(KERN_DEBUG
764 "%s no slot available for "
765 "%s & %s\n", __func__,
766 member->dsp->name,
767 nextm->dsp->name);
768 /* no more slots available */
769 goto conf_software;
770 }
771 /* assign free slot */
772 member->dsp->pcm_slot_tx = i;
773 member->dsp->pcm_slot_rx = i;
774 nextm->dsp->pcm_slot_tx = i;
775 nextm->dsp->pcm_slot_rx = i;
776 member->dsp->pcm_bank_rx = 0;
777 member->dsp->pcm_bank_tx = 1;
778 nextm->dsp->pcm_bank_rx = 1;
779 nextm->dsp->pcm_bank_tx = 0;
780 if (dsp_debug & DEBUG_DSP_CMX)
781 printk(KERN_DEBUG
782 "%s adding %s & %s to new PCM slot %d "
783 "(TX and RX on different chips) because "
784 "both members have not same slots\n",
785 __func__,
786 member->dsp->name,
787 nextm->dsp->name,
788 member->dsp->pcm_slot_tx);
789 dsp_cmx_hw_message(member->dsp, MISDN_CTRL_HFC_PCM_CONN,
790 member->dsp->pcm_slot_tx, member->dsp->pcm_bank_tx,
791 member->dsp->pcm_slot_rx, member->dsp->pcm_bank_rx);
792 dsp_cmx_hw_message(nextm->dsp, MISDN_CTRL_HFC_PCM_CONN,
793 nextm->dsp->pcm_slot_tx, nextm->dsp->pcm_bank_tx,
794 nextm->dsp->pcm_slot_rx, nextm->dsp->pcm_bank_rx);
795 conf->hardware = 1;
796 conf->software = 0;
797 return;
798 /* if members have one bank (or on the same chip) */
799 } else {
800 /* if both members have different crossed slots */
801 if (member->dsp->pcm_slot_tx >= 0 &&
802 member->dsp->pcm_slot_rx >= 0 &&
803 nextm->dsp->pcm_slot_tx >= 0 &&
804 nextm->dsp->pcm_slot_rx >= 0 &&
805 nextm->dsp->pcm_slot_tx ==
806 member->dsp->pcm_slot_rx &&
807 nextm->dsp->pcm_slot_rx ==
808 member->dsp->pcm_slot_tx &&
809 member->dsp->pcm_slot_tx !=
810 member->dsp->pcm_slot_rx &&
811 member->dsp->pcm_bank_tx == 0 &&
812 member->dsp->pcm_bank_rx == 0 &&
813 nextm->dsp->pcm_bank_tx == 0 &&
814 nextm->dsp->pcm_bank_rx == 0) {
815 /* all members have same slot */
816 if (dsp_debug & DEBUG_DSP_CMX)
817 printk(KERN_DEBUG
818 "%s dsp %s & %s stay joined on PCM "
819 "slot %d (TX) %d (RX) on same chip "
820 "or one bank PCM)\n", __func__,
821 member->dsp->name,
822 nextm->dsp->name,
823 member->dsp->pcm_slot_tx,
824 member->dsp->pcm_slot_rx);
825 conf->hardware = 0;
826 conf->software = 1;
827 return;
828 }
829 /* find two new slot */
830 memset(freeslots, 1, sizeof(freeslots));
831 list_for_each_entry(dsp, &dsp_ilist, list) {
832 if (dsp != member->dsp &&
833 dsp != nextm->dsp &&
834 member->dsp->features.pcm_id ==
835 dsp->features.pcm_id) {
836 if (dsp->pcm_slot_rx >= 0 &&
837 dsp->pcm_slot_rx <
838 sizeof(freeslots))
839 freeslots[dsp->pcm_slot_tx] = 0;
840 if (dsp->pcm_slot_tx >= 0 &&
841 dsp->pcm_slot_tx <
842 sizeof(freeslots))
843 freeslots[dsp->pcm_slot_rx] = 0;
844 }
845 }
846 i1 = 0;
847 ii = member->dsp->features.pcm_slots;
848 while (i1 < ii) {
849 if (freeslots[i1])
850 break;
851 i1++;
852 }
853 if (i1 == ii) {
854 if (dsp_debug & DEBUG_DSP_CMX)
855 printk(KERN_DEBUG
856 "%s no slot available "
857 "for %s & %s\n", __func__,
858 member->dsp->name,
859 nextm->dsp->name);
860 /* no more slots available */
861 goto conf_software;
862 }
863 i2 = i1+1;
864 while (i2 < ii) {
865 if (freeslots[i2])
866 break;
867 i2++;
868 }
869 if (i2 == ii) {
870 if (dsp_debug & DEBUG_DSP_CMX)
871 printk(KERN_DEBUG
872 "%s no slot available "
873 "for %s & %s\n",
874 __func__,
875 member->dsp->name,
876 nextm->dsp->name);
877 /* no more slots available */
878 goto conf_software;
879 }
880 /* assign free slots */
881 member->dsp->pcm_slot_tx = i1;
882 member->dsp->pcm_slot_rx = i2;
883 nextm->dsp->pcm_slot_tx = i2;
884 nextm->dsp->pcm_slot_rx = i1;
885 member->dsp->pcm_bank_rx = 0;
886 member->dsp->pcm_bank_tx = 0;
887 nextm->dsp->pcm_bank_rx = 0;
888 nextm->dsp->pcm_bank_tx = 0;
889 if (dsp_debug & DEBUG_DSP_CMX)
890 printk(KERN_DEBUG
891 "%s adding %s & %s to new PCM slot %d "
892 "(TX) %d (RX) on same chip or one bank "
893 "PCM, because both members have not "
894 "crossed slots\n", __func__,
895 member->dsp->name,
896 nextm->dsp->name,
897 member->dsp->pcm_slot_tx,
898 member->dsp->pcm_slot_rx);
899 dsp_cmx_hw_message(member->dsp, MISDN_CTRL_HFC_PCM_CONN,
900 member->dsp->pcm_slot_tx, member->dsp->pcm_bank_tx,
901 member->dsp->pcm_slot_rx, member->dsp->pcm_bank_rx);
902 dsp_cmx_hw_message(nextm->dsp, MISDN_CTRL_HFC_PCM_CONN,
903 nextm->dsp->pcm_slot_tx, nextm->dsp->pcm_bank_tx,
904 nextm->dsp->pcm_slot_rx, nextm->dsp->pcm_bank_rx);
905 conf->hardware = 1;
906 conf->software = 0;
907 return;
908 }
909 }
910
911 /*
912 * if we have more than two, we may check if we have a conference
913 * unit available on the chip. also all members must be on the same
914 */
915
916 /* if not the same HFC chip */
917 if (same_hfc < 0) {
918 if (dsp_debug & DEBUG_DSP_CMX)
919 printk(KERN_DEBUG
920 "%s conference %d cannot be formed, because "
921 "members are on different chips or not "
922 "on HFC chip\n",
923 __func__, conf->id);
924 goto conf_software;
925 }
926
927 /* for more than two members.. */
928
929 /* in case of hdlc, we change to software */
930 if (dsp->hdlc)
931 goto conf_software;
932
933 /* if all members already have the same conference */
934 if (all_conf)
935 return;
936
937 /*
938 * if there is an existing conference, but not all members have joined
939 */
940 if (current_conf >= 0) {
941join_members:
942 list_for_each_entry(member, &conf->mlist, list) {
943 /* join to current conference */
944 if (member->dsp->hfc_conf == current_conf)
945 continue;
946 /* get a free timeslot first */
947 memset(freeslots, 1, sizeof(freeslots));
948 list_for_each_entry(dsp, &dsp_ilist, list) {
949 /*
950 * not checking current member, because
951 * slot will be overwritten.
952 */
953 if (
954 dsp != member->dsp &&
955 /* dsp must be on the same PCM */
956 member->dsp->features.pcm_id ==
957 dsp->features.pcm_id) {
958 /* dsp must be on a slot */
959 if (dsp->pcm_slot_tx >= 0 &&
960 dsp->pcm_slot_tx <
961 sizeof(freeslots))
962 freeslots[dsp->pcm_slot_tx] = 0;
963 if (dsp->pcm_slot_rx >= 0 &&
964 dsp->pcm_slot_rx <
965 sizeof(freeslots))
966 freeslots[dsp->pcm_slot_rx] = 0;
967 }
968 }
969 i = 0;
970 ii = member->dsp->features.pcm_slots;
971 while (i < ii) {
972 if (freeslots[i])
973 break;
974 i++;
975 }
976 if (i == ii) {
977 /* no more slots available */
978 if (dsp_debug & DEBUG_DSP_CMX)
979 printk(KERN_DEBUG
980 "%s conference %d cannot be formed,"
981 " because no slot free\n",
982 __func__, conf->id);
983 goto conf_software;
984 }
985 if (dsp_debug & DEBUG_DSP_CMX)
986 printk(KERN_DEBUG
987 "%s changing dsp %s to HW conference "
988 "%d slot %d\n", __func__,
989 member->dsp->name, current_conf, i);
990 /* assign free slot & set PCM & join conf */
991 member->dsp->pcm_slot_tx = i;
992 member->dsp->pcm_slot_rx = i;
993 member->dsp->pcm_bank_tx = 2; /* loop */
994 member->dsp->pcm_bank_rx = 2;
995 member->dsp->hfc_conf = current_conf;
996 dsp_cmx_hw_message(member->dsp, MISDN_CTRL_HFC_PCM_CONN,
997 i, 2, i, 2);
998 dsp_cmx_hw_message(member->dsp,
999 MISDN_CTRL_HFC_CONF_JOIN, current_conf, 0, 0, 0);
1000 }
1001 return;
1002 }
1003
1004 /*
1005 * no member is in a conference yet, so we find a free one
1006 */
1007 memset(freeunits, 1, sizeof(freeunits));
1008 list_for_each_entry(dsp, &dsp_ilist, list) {
1009 /* dsp must be on the same chip */
1010 if (dsp->features.hfc_id == same_hfc &&
1011 /* dsp must have joined a HW conference */
1012 dsp->hfc_conf >= 0 &&
1013 /* slot must be within range */
1014 dsp->hfc_conf < 8)
1015 freeunits[dsp->hfc_conf] = 0;
1016 }
1017 i = 0;
1018 ii = 8;
1019 while (i < ii) {
1020 if (freeunits[i])
1021 break;
1022 i++;
1023 }
1024 if (i == ii) {
1025 /* no more conferences available */
1026 if (dsp_debug & DEBUG_DSP_CMX)
1027 printk(KERN_DEBUG
1028 "%s conference %d cannot be formed, because "
1029 "no conference number free\n",
1030 __func__, conf->id);
1031 goto conf_software;
1032 }
1033 /* join all members */
1034 current_conf = i;
1035 goto join_members;
1036}
1037
1038
1039/*
1040 * conf_id != 0: join or change conference
1041 * conf_id == 0: split from conference if not already
1042 */
1043int
1044dsp_cmx_conf(struct dsp *dsp, u32 conf_id)
1045{
1046 int err;
1047 struct dsp_conf *conf;
1048 struct dsp_conf_member *member;
1049
1050 /* if conference doesn't change */
1051 if (dsp->conf_id == conf_id)
1052 return 0;
1053
1054 /* first remove us from current conf */
1055 if (dsp->conf_id) {
1056 if (dsp_debug & DEBUG_DSP_CMX)
1057 printk(KERN_DEBUG "removing us from conference %d\n",
1058 dsp->conf->id);
1059 /* remove us from conf */
1060 conf = dsp->conf;
1061 err = dsp_cmx_del_conf_member(dsp);
1062 if (err)
1063 return err;
1064 dsp->conf_id = 0;
1065
1066 /* update hardware */
1067 dsp_cmx_hardware(NULL, dsp);
1068
1069 /* conf now empty? */
1070 if (list_empty(&conf->mlist)) {
1071 if (dsp_debug & DEBUG_DSP_CMX)
1072 printk(KERN_DEBUG
1073 "conference is empty, so we remove it.\n");
1074 err = dsp_cmx_del_conf(conf);
1075 if (err)
1076 return err;
1077 } else {
1078 /* update members left on conf */
1079 dsp_cmx_hardware(conf, NULL);
1080 }
1081 }
1082
1083 /* if split */
1084 if (!conf_id)
1085 return 0;
1086
1087 /* now add us to conf */
1088 if (dsp_debug & DEBUG_DSP_CMX)
1089 printk(KERN_DEBUG "searching conference %d\n",
1090 conf_id);
1091 conf = dsp_cmx_search_conf(conf_id);
1092 if (!conf) {
1093 if (dsp_debug & DEBUG_DSP_CMX)
1094 printk(KERN_DEBUG
1095 "conference doesn't exist yet, creating.\n");
1096 /* the conference doesn't exist, so we create */
1097 conf = dsp_cmx_new_conf(conf_id);
1098 if (!conf)
1099 return -EINVAL;
1100 } else if (!list_empty(&conf->mlist)) {
1101 member = list_entry(conf->mlist.next, struct dsp_conf_member,
1102 list);
1103 if (dsp->hdlc && !member->dsp->hdlc) {
1104 if (dsp_debug & DEBUG_DSP_CMX)
1105 printk(KERN_DEBUG
1106 "cannot join transparent conference.\n");
1107 return -EINVAL;
1108 }
1109 if (!dsp->hdlc && member->dsp->hdlc) {
1110 if (dsp_debug & DEBUG_DSP_CMX)
1111 printk(KERN_DEBUG
1112 "cannot join hdlc conference.\n");
1113 return -EINVAL;
1114 }
1115 }
1116 /* add conference member */
1117 err = dsp_cmx_add_conf_member(dsp, conf);
1118 if (err)
1119 return err;
1120 dsp->conf_id = conf_id;
1121
1122 /* if we are alone, we do nothing! */
1123 if (list_empty(&conf->mlist)) {
1124 if (dsp_debug & DEBUG_DSP_CMX)
1125 printk(KERN_DEBUG
1126 "we are alone in this conference, so exit.\n");
1127 /* update hardware */
1128 dsp_cmx_hardware(NULL, dsp);
1129 return 0;
1130 }
1131
1132 /* update members on conf */
1133 dsp_cmx_hardware(conf, NULL);
1134
1135 return 0;
1136}
1137
1138
1139/*
1140 * audio data is received from card
1141 */
1142void
1143dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb)
1144{
1145 u8 *d, *p;
1146 int len = skb->len;
1147 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1148 int w, i, ii;
1149
1150 /* check if we have sompen */
1151 if (len < 1)
1152 return;
1153
1154 /* half of the buffer should be larger than maximum packet size */
1155 if (len >= CMX_BUFF_HALF) {
1156 printk(KERN_ERR
1157 "%s line %d: packet from card is too large (%d bytes). "
1158 "please make card send smaller packets OR increase "
1159 "CMX_BUFF_SIZE\n", __FILE__, __LINE__, len);
1160 return;
1161 }
1162
1163 /*
1164 * initialize pointers if not already -
1165 * also add delay if requested by PH_SIGNAL
1166 */
1167 if (dsp->rx_init) {
1168 dsp->rx_init = 0;
1169 if (dsp->features.unordered) {
1170 dsp->rx_R = (hh->id & CMX_BUFF_MASK);
1171 dsp->rx_W = (dsp->rx_R + dsp->cmx_delay)
1172 & CMX_BUFF_MASK;
1173 } else {
1174 dsp->rx_R = 0;
1175 dsp->rx_W = dsp->cmx_delay;
1176 }
1177 }
1178 /* if frame contains time code, write directly */
1179 if (dsp->features.unordered) {
1180 dsp->rx_W = (hh->id & CMX_BUFF_MASK);
1181 /* printk(KERN_DEBUG "%s %08x\n", dsp->name, hh->id); */
1182 }
1183 /*
1184 * if we underrun (or maybe overrun),
1185 * we set our new read pointer, and write silence to buffer
1186 */
1187 if (((dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK) >= CMX_BUFF_HALF) {
1188 if (dsp_debug & DEBUG_DSP_CMX)
1189 printk(KERN_DEBUG
1190 "cmx_receive(dsp=%lx): UNDERRUN (or overrun the "
1191 "maximum delay), adjusting read pointer! "
1192 "(inst %s)\n", (u_long)dsp, dsp->name);
1193 /* flush buffer */
1194 if (dsp->features.unordered) {
1195 dsp->rx_R = (hh->id & CMX_BUFF_MASK);
1196 dsp->rx_W = (dsp->rx_R + dsp->cmx_delay)
1197 & CMX_BUFF_MASK;
1198 } else {
1199 dsp->rx_R = 0;
1200 dsp->rx_W = dsp->cmx_delay;
1201 }
1202 memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff));
1203 }
1204 /* if we have reached double delay, jump back to middle */
1205 if (dsp->cmx_delay)
1206 if (((dsp->rx_W - dsp->rx_R) & CMX_BUFF_MASK) >=
1207 (dsp->cmx_delay << 1)) {
1208 if (dsp_debug & DEBUG_DSP_CMX)
1209 printk(KERN_DEBUG
1210 "cmx_receive(dsp=%lx): OVERRUN (because "
1211 "twice the delay is reached), adjusting "
1212 "read pointer! (inst %s)\n",
1213 (u_long)dsp, dsp->name);
1214 /* flush buffer */
1215 if (dsp->features.unordered) {
1216 dsp->rx_R = (hh->id & CMX_BUFF_MASK);
1217 dsp->rx_W = (dsp->rx_R + dsp->cmx_delay)
1218 & CMX_BUFF_MASK;
1219 } else {
1220 dsp->rx_R = 0;
1221 dsp->rx_W = dsp->cmx_delay;
1222 }
1223 memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff));
1224 }
1225
1226 /* show where to write */
1227#ifdef CMX_DEBUG
1228 printk(KERN_DEBUG
1229 "cmx_receive(dsp=%lx): rx_R(dsp)=%05x rx_W(dsp)=%05x len=%d %s\n",
1230 (u_long)dsp, dsp->rx_R, dsp->rx_W, len, dsp->name);
1231#endif
1232
1233 /* write data into rx_buffer */
1234 p = skb->data;
1235 d = dsp->rx_buff;
1236 w = dsp->rx_W;
1237 i = 0;
1238 ii = len;
1239 while (i < ii) {
1240 d[w++ & CMX_BUFF_MASK] = *p++;
1241 i++;
1242 }
1243
1244 /* increase write-pointer */
1245 dsp->rx_W = ((dsp->rx_W+len) & CMX_BUFF_MASK);
1246}
1247
1248
1249/*
1250 * send (mixed) audio data to card and control jitter
1251 */
1252static void
1253dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members)
1254{
1255 struct dsp_conf *conf = dsp->conf;
1256 struct dsp *member, *other;
1257 register s32 sample;
1258 u8 *d, *p, *q, *o_q;
1259 struct sk_buff *nskb, *txskb;
1260 int r, rr, t, tt, o_r, o_rr;
1261 int preload = 0;
1262 struct mISDNhead *hh, *thh;
1263
1264 /* don't process if: */
1265 if (!dsp->b_active) { /* if not active */
1266 dsp->last_tx = 0;
1267 return;
1268 }
1269 if (dsp->pcm_slot_tx >= 0 && /* connected to pcm slot */
1270 dsp->tx_R == dsp->tx_W && /* AND no tx-data */
1271 !(dsp->tone.tone && dsp->tone.software)) { /* AND not soft tones */
1272 dsp->last_tx = 0;
1273 return;
1274 }
1275
1276#ifdef CMX_DEBUG
1277 printk(KERN_DEBUG
1278 "SEND members=%d dsp=%s, conf=%p, rx_R=%05x rx_W=%05x\n",
1279 members, dsp->name, conf, dsp->rx_R, dsp->rx_W);
1280#endif
1281
1282 /* preload if we have delay set */
1283 if (dsp->cmx_delay && !dsp->last_tx) {
1284 preload = len;
1285 if (preload < 128)
1286 preload = 128;
1287 }
1288
1289 /* PREPARE RESULT */
1290 nskb = mI_alloc_skb(len + preload, GFP_ATOMIC);
1291 if (!nskb) {
1292 printk(KERN_ERR
1293 "FATAL ERROR in mISDN_dsp.o: cannot alloc %d bytes\n",
1294 len + preload);
1295 return;
1296 }
1297 hh = mISDN_HEAD_P(nskb);
1298 hh->prim = PH_DATA_REQ;
1299 hh->id = 0;
1300 dsp->last_tx = 1;
1301
1302 /* set pointers, indexes and stuff */
1303 member = dsp;
1304 p = dsp->tx_buff; /* transmit data */
1305 q = dsp->rx_buff; /* received data */
1306 d = skb_put(nskb, preload + len); /* result */
1307 t = dsp->tx_R; /* tx-pointers */
1308 tt = dsp->tx_W;
1309 r = dsp->rx_R; /* rx-pointers */
1310 rr = (r + len) & CMX_BUFF_MASK;
1311
1312 /* preload with silence, if required */
1313 if (preload) {
1314 memset(d, dsp_silence, preload);
1315 d += preload;
1316 }
1317
1318 /* PROCESS TONES/TX-DATA ONLY */
1319 if (dsp->tone.tone && dsp->tone.software) {
1320 /* -> copy tone */
1321 dsp_tone_copy(dsp, d, len);
1322 dsp->tx_R = 0; /* clear tx buffer */
1323 dsp->tx_W = 0;
1324 goto send_packet;
1325 }
1326 /* if we have tx-data but do not use mixing */
1327 if (!dsp->tx_mix && t != tt) {
1328 /* -> send tx-data and continue when not enough */
1329#ifdef CMX_TX_DEBUG
1330 sprintf(debugbuf, "TX sending (%04x-%04x)%p: ", t, tt, p);
1331#endif
1332 while (r != rr && t != tt) {
1333#ifdef CMX_TX_DEBUG
1334 if (strlen(debugbuf) < 48)
1335 sprintf(debugbuf+strlen(debugbuf), " %02x", p[t]);
1336#endif
1337 *d++ = p[t]; /* write tx_buff */
1338 t = (t+1) & CMX_BUFF_MASK;
1339 r = (r+1) & CMX_BUFF_MASK;
1340 }
1341 if (r == rr) {
1342 dsp->tx_R = t;
1343#ifdef CMX_TX_DEBUG
1344 printk(KERN_DEBUG "%s\n", debugbuf);
1345#endif
1346 goto send_packet;
1347 }
1348 }
1349#ifdef CMX_TX_DEBUG
1350 printk(KERN_DEBUG "%s\n", debugbuf);
1351#endif
1352
1353 /* PROCESS DATA (one member / no conf) */
1354 if (!conf || members <= 1) {
1355 /* -> if echo is NOT enabled */
1356 if (!dsp->echo) {
1357 /* -> send tx-data if available or use 0-volume */
1358 while (r != rr && t != tt) {
1359 *d++ = p[t]; /* write tx_buff */
1360 t = (t+1) & CMX_BUFF_MASK;
1361 r = (r+1) & CMX_BUFF_MASK;
1362 }
1363 if (r != rr)
1364 memset(d, dsp_silence, (rr-r)&CMX_BUFF_MASK);
1365 /* -> if echo is enabled */
1366 } else {
1367 /*
1368 * -> mix tx-data with echo if available,
1369 * or use echo only
1370 */
1371 while (r != rr && t != tt) {
1372 *d++ = dsp_audio_mix_law[(p[t]<<8)|q[r]];
1373 t = (t+1) & CMX_BUFF_MASK;
1374 r = (r+1) & CMX_BUFF_MASK;
1375 }
1376 while (r != rr) {
1377 *d++ = q[r]; /* echo */
1378 r = (r+1) & CMX_BUFF_MASK;
1379 }
1380 }
1381 dsp->tx_R = t;
1382 goto send_packet;
1383 }
1384 /* PROCESS DATA (two members) */
1385#ifdef CMX_CONF_DEBUG
1386 if (0) {
1387#else
1388 if (members == 2) {
1389#endif
1390 /* "other" becomes other party */
1391 other = (list_entry(conf->mlist.next,
1392 struct dsp_conf_member, list))->dsp;
1393 if (other == member)
1394 other = (list_entry(conf->mlist.prev,
1395 struct dsp_conf_member, list))->dsp;
1396 o_q = other->rx_buff; /* received data */
1397 o_rr = (other->rx_R + len) & CMX_BUFF_MASK;
1398 /* end of rx-pointer */
1399 o_r = (o_rr - rr + r) & CMX_BUFF_MASK;
1400 /* start rx-pointer at current read position*/
1401 /* -> if echo is NOT enabled */
1402 if (!dsp->echo) {
1403 /*
1404 * -> copy other member's rx-data,
1405 * if tx-data is available, mix
1406 */
1407 while (o_r != o_rr && t != tt) {
1408 *d++ = dsp_audio_mix_law[(p[t]<<8)|o_q[o_r]];
1409 t = (t+1) & CMX_BUFF_MASK;
1410 o_r = (o_r+1) & CMX_BUFF_MASK;
1411 }
1412 while (o_r != o_rr) {
1413 *d++ = o_q[o_r];
1414 o_r = (o_r+1) & CMX_BUFF_MASK;
1415 }
1416 /* -> if echo is enabled */
1417 } else {
1418 /*
1419 * -> mix other member's rx-data with echo,
1420 * if tx-data is available, mix
1421 */
1422 while (r != rr && t != tt) {
1423 sample = dsp_audio_law_to_s32[p[t]] +
1424 dsp_audio_law_to_s32[q[r]] +
1425 dsp_audio_law_to_s32[o_q[o_r]];
1426 if (sample < -32768)
1427 sample = -32768;
1428 else if (sample > 32767)
1429 sample = 32767;
1430 *d++ = dsp_audio_s16_to_law[sample & 0xffff];
1431 /* tx-data + rx_data + echo */
1432 t = (t+1) & CMX_BUFF_MASK;
1433 r = (r+1) & CMX_BUFF_MASK;
1434 o_r = (o_r+1) & CMX_BUFF_MASK;
1435 }
1436 while (r != rr) {
1437 *d++ = dsp_audio_mix_law[(q[r]<<8)|o_q[o_r]];
1438 r = (r+1) & CMX_BUFF_MASK;
1439 o_r = (o_r+1) & CMX_BUFF_MASK;
1440 }
1441 }
1442 dsp->tx_R = t;
1443 goto send_packet;
1444 }
1445#ifdef DSP_NEVER_DEFINED
1446 }
1447#endif
1448 /* PROCESS DATA (three or more members) */
1449 /* -> if echo is NOT enabled */
1450 if (!dsp->echo) {
1451 /*
1452 * -> substract rx-data from conf-data,
1453 * if tx-data is available, mix
1454 */
1455 while (r != rr && t != tt) {
1456 sample = dsp_audio_law_to_s32[p[t]] + *c++ -
1457 dsp_audio_law_to_s32[q[r]];
1458 if (sample < -32768)
1459 sample = -32768;
1460 else if (sample > 32767)
1461 sample = 32767;
1462 *d++ = dsp_audio_s16_to_law[sample & 0xffff];
1463 /* conf-rx+tx */
1464 r = (r+1) & CMX_BUFF_MASK;
1465 t = (t+1) & CMX_BUFF_MASK;
1466 }
1467 while (r != rr) {
1468 sample = *c++ - dsp_audio_law_to_s32[q[r]];
1469 if (sample < -32768)
1470 sample = -32768;
1471 else if (sample > 32767)
1472 sample = 32767;
1473 *d++ = dsp_audio_s16_to_law[sample & 0xffff];
1474 /* conf-rx */
1475 r = (r+1) & CMX_BUFF_MASK;
1476 }
1477 /* -> if echo is enabled */
1478 } else {
1479 /*
1480 * -> encode conf-data, if tx-data
1481 * is available, mix
1482 */
1483 while (r != rr && t != tt) {
1484 sample = dsp_audio_law_to_s32[p[t]] + *c++;
1485 if (sample < -32768)
1486 sample = -32768;
1487 else if (sample > 32767)
1488 sample = 32767;
1489 *d++ = dsp_audio_s16_to_law[sample & 0xffff];
1490 /* conf(echo)+tx */
1491 t = (t+1) & CMX_BUFF_MASK;
1492 r = (r+1) & CMX_BUFF_MASK;
1493 }
1494 while (r != rr) {
1495 sample = *c++;
1496 if (sample < -32768)
1497 sample = -32768;
1498 else if (sample > 32767)
1499 sample = 32767;
1500 *d++ = dsp_audio_s16_to_law[sample & 0xffff];
1501 /* conf(echo) */
1502 r = (r+1) & CMX_BUFF_MASK;
1503 }
1504 }
1505 dsp->tx_R = t;
1506 goto send_packet;
1507
1508send_packet:
1509 /*
1510 * send tx-data if enabled - don't filter,
1511 * becuase we want what we send, not what we filtered
1512 */
1513 if (dsp->tx_data) {
1514 /* PREPARE RESULT */
1515 txskb = mI_alloc_skb(len, GFP_ATOMIC);
1516 if (!txskb) {
1517 printk(KERN_ERR
1518 "FATAL ERROR in mISDN_dsp.o: "
1519 "cannot alloc %d bytes\n", len);
1520 } else {
1521 thh = mISDN_HEAD_P(txskb);
1522 thh->prim = DL_DATA_REQ;
1523 thh->id = 0;
1524 memcpy(skb_put(txskb, len), nskb->data+preload, len);
1525 /* queue (trigger later) */
1526 skb_queue_tail(&dsp->sendq, txskb);
1527 }
1528 }
1529 /* adjust volume */
1530 if (dsp->tx_volume)
1531 dsp_change_volume(nskb, dsp->tx_volume);
1532 /* pipeline */
1533 if (dsp->pipeline.inuse)
1534 dsp_pipeline_process_tx(&dsp->pipeline, nskb->data, nskb->len);
1535 /* crypt */
1536 if (dsp->bf_enable)
1537 dsp_bf_encrypt(dsp, nskb->data, nskb->len);
1538 /* queue and trigger */
1539 skb_queue_tail(&dsp->sendq, nskb);
1540 schedule_work(&dsp->workq);
1541}
1542
1543u32 samplecount;
1544struct timer_list dsp_spl_tl;
1545u32 dsp_spl_jiffies; /* calculate the next time to fire */
1546u32 dsp_start_jiffies; /* jiffies at the time, the calculation begins */
1547struct timeval dsp_start_tv; /* time at start of calculation */
1548
1549void
1550dsp_cmx_send(void *arg)
1551{
1552 struct dsp_conf *conf;
1553 struct dsp_conf_member *member;
1554 struct dsp *dsp;
1555 int mustmix, members;
1556 s32 mixbuffer[MAX_POLL+100], *c;
1557 u8 *p, *q;
1558 int r, rr;
1559 int jittercheck = 0, delay, i;
1560 u_long flags;
1561 struct timeval tv;
1562 u32 elapsed;
1563 s16 length;
1564
1565 /* lock */
1566 spin_lock_irqsave(&dsp_lock, flags);
1567
1568 if (!dsp_start_tv.tv_sec) {
1569 do_gettimeofday(&dsp_start_tv);
1570 length = dsp_poll;
1571 } else {
1572 do_gettimeofday(&tv);
1573 elapsed = ((tv.tv_sec - dsp_start_tv.tv_sec) * 8000)
1574 + ((s32)(tv.tv_usec / 125) - (dsp_start_tv.tv_usec / 125));
1575 dsp_start_tv.tv_sec = tv.tv_sec;
1576 dsp_start_tv.tv_usec = tv.tv_usec;
1577 length = elapsed;
1578 }
1579 if (length > MAX_POLL + 100)
1580 length = MAX_POLL + 100;
1581/* printk(KERN_DEBUG "len=%d dsp_count=0x%x.%04x dsp_poll_diff=0x%x.%04x\n",
1582 length, dsp_count >> 16, dsp_count & 0xffff, dsp_poll_diff >> 16,
1583 dsp_poll_diff & 0xffff);
1584 */
1585
1586 /*
1587 * check if jitter needs to be checked
1588 * (this is about every second = 8192 samples)
1589 */
1590 samplecount += length;
1591 if ((samplecount & 8191) < length)
1592 jittercheck = 1;
1593
1594 /* loop all members that do not require conference mixing */
1595 list_for_each_entry(dsp, &dsp_ilist, list) {
1596 if (dsp->hdlc)
1597 continue;
1598 conf = dsp->conf;
1599 mustmix = 0;
1600 members = 0;
1601 if (conf) {
1602 members = count_list_member(&conf->mlist);
1603#ifdef CMX_CONF_DEBUG
1604 if (conf->software && members > 1)
1605#else
1606 if (conf->software && members > 2)
1607#endif
1608 mustmix = 1;
1609 }
1610
1611 /* transmission required */
1612 if (!mustmix) {
1613 dsp_cmx_send_member(dsp, length, mixbuffer, members);
1614
1615 /*
1616 * unused mixbuffer is given to prevent a
1617 * potential null-pointer-bug
1618 */
1619 }
1620 }
1621
1622 /* loop all members that require conference mixing */
1623 list_for_each_entry(conf, &conf_ilist, list) {
1624 /* count members and check hardware */
1625 members = count_list_member(&conf->mlist);
1626#ifdef CMX_CONF_DEBUG
1627 if (conf->software && members > 1) {
1628#else
1629 if (conf->software && members > 2) {
1630#endif
1631 /* check for hdlc conf */
1632 member = list_entry(conf->mlist.next,
1633 struct dsp_conf_member, list);
1634 if (member->dsp->hdlc)
1635 continue;
1636 /* mix all data */
1637 memset(mixbuffer, 0, length*sizeof(s32));
1638 list_for_each_entry(member, &conf->mlist, list) {
1639 dsp = member->dsp;
1640 /* get range of data to mix */
1641 c = mixbuffer;
1642 q = dsp->rx_buff;
1643 r = dsp->rx_R;
1644 rr = (r + length) & CMX_BUFF_MASK;
1645 /* add member's data */
1646 while (r != rr) {
1647 *c++ += dsp_audio_law_to_s32[q[r]];
1648 r = (r+1) & CMX_BUFF_MASK;
1649 }
1650 }
1651
1652 /* process each member */
1653 list_for_each_entry(member, &conf->mlist, list) {
1654 /* transmission */
1655 dsp_cmx_send_member(member->dsp, length,
1656 mixbuffer, members);
1657 }
1658 }
1659 }
1660
1661 /* delete rx-data, increment buffers, change pointers */
1662 list_for_each_entry(dsp, &dsp_ilist, list) {
1663 if (dsp->hdlc)
1664 continue;
1665 p = dsp->rx_buff;
1666 q = dsp->tx_buff;
1667 r = dsp->rx_R;
1668 /* move receive pointer when receiving */
1669 if (!dsp->rx_is_off) {
1670 rr = (r + length) & CMX_BUFF_MASK;
1671 /* delete rx-data */
1672 while (r != rr) {
1673 p[r] = dsp_silence;
1674 r = (r+1) & CMX_BUFF_MASK;
1675 }
1676 /* increment rx-buffer pointer */
1677 dsp->rx_R = r; /* write incremented read pointer */
1678 }
1679
1680 /* check current rx_delay */
1681 delay = (dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK;
1682 if (delay >= CMX_BUFF_HALF)
1683 delay = 0; /* will be the delay before next write */
1684 /* check for lower delay */
1685 if (delay < dsp->rx_delay[0])
1686 dsp->rx_delay[0] = delay;
1687 /* check current tx_delay */
1688 delay = (dsp->tx_W-dsp->tx_R) & CMX_BUFF_MASK;
1689 if (delay >= CMX_BUFF_HALF)
1690 delay = 0; /* will be the delay before next write */
1691 /* check for lower delay */
1692 if (delay < dsp->tx_delay[0])
1693 dsp->tx_delay[0] = delay;
1694 if (jittercheck) {
1695 /* find the lowest of all rx_delays */
1696 delay = dsp->rx_delay[0];
1697 i = 1;
1698 while (i < MAX_SECONDS_JITTER_CHECK) {
1699 if (delay > dsp->rx_delay[i])
1700 delay = dsp->rx_delay[i];
1701 i++;
1702 }
1703 /*
1704 * remove rx_delay only if we have delay AND we
1705 * have not preset cmx_delay
1706 */
1707 if (delay && !dsp->cmx_delay) {
1708 if (dsp_debug & DEBUG_DSP_CMX)
1709 printk(KERN_DEBUG
1710 "%s lowest rx_delay of %d bytes for"
1711 " dsp %s are now removed.\n",
1712 __func__, delay,
1713 dsp->name);
1714 r = dsp->rx_R;
1715 rr = (r + delay) & CMX_BUFF_MASK;
1716 /* delete rx-data */
1717 while (r != rr) {
1718 p[r] = dsp_silence;
1719 r = (r+1) & CMX_BUFF_MASK;
1720 }
1721 /* increment rx-buffer pointer */
1722 dsp->rx_R = r;
1723 /* write incremented read pointer */
1724 }
1725 /* find the lowest of all tx_delays */
1726 delay = dsp->tx_delay[0];
1727 i = 1;
1728 while (i < MAX_SECONDS_JITTER_CHECK) {
1729 if (delay > dsp->tx_delay[i])
1730 delay = dsp->tx_delay[i];
1731 i++;
1732 }
1733 /*
1734 * remove delay only if we have delay AND we
1735 * have enabled tx_dejitter
1736 */
1737 if (delay && dsp->tx_dejitter) {
1738 if (dsp_debug & DEBUG_DSP_CMX)
1739 printk(KERN_DEBUG
1740 "%s lowest tx_delay of %d bytes for"
1741 " dsp %s are now removed.\n",
1742 __func__, delay,
1743 dsp->name);
1744 r = dsp->tx_R;
1745 rr = (r + delay) & CMX_BUFF_MASK;
1746 /* delete tx-data */
1747 while (r != rr) {
1748 q[r] = dsp_silence;
1749 r = (r+1) & CMX_BUFF_MASK;
1750 }
1751 /* increment rx-buffer pointer */
1752 dsp->tx_R = r;
1753 /* write incremented read pointer */
1754 }
1755 /* scroll up delays */
1756 i = MAX_SECONDS_JITTER_CHECK - 1;
1757 while (i) {
1758 dsp->rx_delay[i] = dsp->rx_delay[i-1];
1759 dsp->tx_delay[i] = dsp->tx_delay[i-1];
1760 i--;
1761 }
1762 dsp->tx_delay[0] = CMX_BUFF_HALF; /* (infinite) delay */
1763 dsp->rx_delay[0] = CMX_BUFF_HALF; /* (infinite) delay */
1764 }
1765 }
1766
1767 /* if next event would be in the past ... */
1768 if ((s32)(dsp_spl_jiffies+dsp_tics-jiffies) <= 0)
1769 dsp_spl_jiffies = jiffies + 1;
1770 else
1771 dsp_spl_jiffies += dsp_tics;
1772
1773 dsp_spl_tl.expires = dsp_spl_jiffies;
1774 add_timer(&dsp_spl_tl);
1775
1776 /* unlock */
1777 spin_unlock_irqrestore(&dsp_lock, flags);
1778}
1779
1780/*
1781 * audio data is transmitted from upper layer to the dsp
1782 */
1783void
1784dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb)
1785{
1786 u_int w, ww;
1787 u8 *d, *p;
1788 int space; /* todo: , l = skb->len; */
1789#ifdef CMX_TX_DEBUG
1790 char debugbuf[256] = "";
1791#endif
1792
1793 /* check if there is enough space, and then copy */
1794 w = dsp->tx_W;
1795 ww = dsp->tx_R;
1796 p = dsp->tx_buff;
1797 d = skb->data;
1798 space = ww-w;
1799 if (space <= 0)
1800 space += CMX_BUFF_SIZE;
1801 /* write-pointer should not overrun nor reach read pointer */
1802 if (space-1 < skb->len)
1803 /* write to the space we have left */
1804 ww = (ww - 1) & CMX_BUFF_MASK;
1805 else
1806 /* write until all byte are copied */
1807 ww = (w + skb->len) & CMX_BUFF_MASK;
1808 dsp->tx_W = ww;
1809
1810 /* show current buffer */
1811#ifdef CMX_DEBUG
1812 printk(KERN_DEBUG
1813 "cmx_transmit(dsp=%lx) %d bytes to 0x%x-0x%x. %s\n",
1814 (u_long)dsp, (ww-w)&CMX_BUFF_MASK, w, ww, dsp->name);
1815#endif
1816
1817 /* copy transmit data to tx-buffer */
1818#ifdef CMX_TX_DEBUG
1819 sprintf(debugbuf, "TX getting (%04x-%04x)%p: ", w, ww, p);
1820#endif
1821 while (w != ww) {
1822#ifdef CMX_TX_DEBUG
1823 if (strlen(debugbuf) < 48)
1824 sprintf(debugbuf+strlen(debugbuf), " %02x", *d);
1825#endif
1826 p[w] = *d++;
1827 w = (w+1) & CMX_BUFF_MASK;
1828 }
1829#ifdef CMX_TX_DEBUG
1830 printk(KERN_DEBUG "%s\n", debugbuf);
1831#endif
1832
1833}
1834
1835/*
1836 * hdlc data is received from card and sent to all members.
1837 */
1838void
1839dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb)
1840{
1841 struct sk_buff *nskb = NULL;
1842 struct dsp_conf_member *member;
1843 struct mISDNhead *hh;
1844
1845 /* not if not active */
1846 if (!dsp->b_active)
1847 return;
1848
1849 /* check if we have sompen */
1850 if (skb->len < 1)
1851 return;
1852
1853 /* no conf */
1854 if (!dsp->conf) {
1855 /* in case of hardware (echo) */
1856 if (dsp->pcm_slot_tx >= 0)
1857 return;
1858 if (dsp->echo)
1859 nskb = skb_clone(skb, GFP_ATOMIC);
1860 if (nskb) {
1861 hh = mISDN_HEAD_P(nskb);
1862 hh->prim = PH_DATA_REQ;
1863 hh->id = 0;
1864 skb_queue_tail(&dsp->sendq, nskb);
1865 schedule_work(&dsp->workq);
1866 }
1867 return;
1868 }
1869 /* in case of hardware conference */
1870 if (dsp->conf->hardware)
1871 return;
1872 list_for_each_entry(member, &dsp->conf->mlist, list) {
1873 if (dsp->echo || member->dsp != dsp) {
1874 nskb = skb_clone(skb, GFP_ATOMIC);
1875 if (nskb) {
1876 hh = mISDN_HEAD_P(nskb);
1877 hh->prim = PH_DATA_REQ;
1878 hh->id = 0;
1879 skb_queue_tail(&member->dsp->sendq, nskb);
1880 schedule_work(&member->dsp->workq);
1881 }
1882 }
1883 }
1884}
1885
1886
diff --git a/drivers/isdn/mISDN/dsp_core.c b/drivers/isdn/mISDN/dsp_core.c
new file mode 100644
index 000000000000..2f10ed82c0db
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_core.c
@@ -0,0 +1,1191 @@
1/*
2 * Author Andreas Eversberg (jolly@eversberg.eu)
3 * Based on source code structure by
4 * Karsten Keil (keil@isdn4linux.de)
5 *
6 * This file is (c) under GNU PUBLIC LICENSE
7 * For changes and modifications please read
8 * ../../../Documentation/isdn/mISDN.cert
9 *
10 * Thanks to Karsten Keil (great drivers)
11 * Cologne Chip (great chips)
12 *
13 * This module does:
14 * Real-time tone generation
15 * DTMF detection
16 * Real-time cross-connection and conferrence
17 * Compensate jitter due to system load and hardware fault.
18 * All features are done in kernel space and will be realized
19 * using hardware, if available and supported by chip set.
20 * Blowfish encryption/decryption
21 */
22
23/* STRUCTURE:
24 *
25 * The dsp module provides layer 2 for b-channels (64kbit). It provides
26 * transparent audio forwarding with special digital signal processing:
27 *
28 * - (1) generation of tones
29 * - (2) detection of dtmf tones
30 * - (3) crossconnecting and conferences (clocking)
31 * - (4) echo generation for delay test
32 * - (5) volume control
33 * - (6) disable receive data
34 * - (7) pipeline
35 * - (8) encryption/decryption
36 *
37 * Look:
38 * TX RX
39 * ------upper layer------
40 * | ^
41 * | |(6)
42 * v |
43 * +-----+-------------+-----+
44 * |(3)(4) |
45 * | CMX |
46 * | |
47 * | +-------------+
48 * | | ^
49 * | | |
50 * |+---------+| +----+----+
51 * ||(1) || |(2) |
52 * || || | |
53 * || Tones || | DTMF |
54 * || || | |
55 * || || | |
56 * |+----+----+| +----+----+
57 * +-----+-----+ ^
58 * | |
59 * v |
60 * +----+----+ +----+----+
61 * |(5) | |(5) |
62 * | | | |
63 * |TX Volume| |RX Volume|
64 * | | | |
65 * | | | |
66 * +----+----+ +----+----+
67 * | ^
68 * | |
69 * v |
70 * +----+-------------+----+
71 * |(7) |
72 * | |
73 * | Pipeline Processing |
74 * | |
75 * | |
76 * +----+-------------+----+
77 * | ^
78 * | |
79 * v |
80 * +----+----+ +----+----+
81 * |(8) | |(8) |
82 * | | | |
83 * | Encrypt | | Decrypt |
84 * | | | |
85 * | | | |
86 * +----+----+ +----+----+
87 * | ^
88 * | |
89 * v |
90 * ------card layer------
91 * TX RX
92 *
93 * Above you can see the logical data flow. If software is used to do the
94 * process, it is actually the real data flow. If hardware is used, data
95 * may not flow, but hardware commands to the card, to provide the data flow
96 * as shown.
97 *
98 * NOTE: The channel must be activated in order to make dsp work, even if
99 * no data flow to the upper layer is intended. Activation can be done
100 * after and before controlling the setting using PH_CONTROL requests.
101 *
102 * DTMF: Will be detected by hardware if possible. It is done before CMX
103 * processing.
104 *
105 * Tones: Will be generated via software if endless looped audio fifos are
106 * not supported by hardware. Tones will override all data from CMX.
107 * It is not required to join a conference to use tones at any time.
108 *
109 * CMX: Is transparent when not used. When it is used, it will do
110 * crossconnections and conferences via software if not possible through
111 * hardware. If hardware capability is available, hardware is used.
112 *
113 * Echo: Is generated by CMX and is used to check performane of hard and
114 * software CMX.
115 *
116 * The CMX has special functions for conferences with one, two and more
117 * members. It will allow different types of data flow. Receive and transmit
118 * data to/form upper layer may be swithed on/off individually without loosing
119 * features of CMX, Tones and DTMF.
120 *
121 * Echo Cancellation: Sometimes we like to cancel echo from the interface.
122 * Note that a VoIP call may not have echo caused by the IP phone. The echo
123 * is generated by the telephone line connected to it. Because the delay
124 * is high, it becomes an echo. RESULT: Echo Cachelation is required if
125 * both echo AND delay is applied to an interface.
126 * Remember that software CMX always generates a more or less delay.
127 *
128 * If all used features can be realized in hardware, and if transmit and/or
129 * receive data ist disabled, the card may not send/receive any data at all.
130 * Not receiving is usefull if only announcements are played. Not sending is
131 * usefull if an answering machine records audio. Not sending and receiving is
132 * usefull during most states of the call. If supported by hardware, tones
133 * will be played without cpu load. Small PBXs and NT-Mode applications will
134 * not need expensive hardware when processing calls.
135 *
136 *
137 * LOCKING:
138 *
139 * When data is received from upper or lower layer (card), the complete dsp
140 * module is locked by a global lock. This lock MUST lock irq, because it
141 * must lock timer events by DSP poll timer.
142 * When data is ready to be transmitted down, the data is queued and sent
143 * outside lock and timer event.
144 * PH_CONTROL must not change any settings, join or split conference members
145 * during process of data.
146 *
147 * HDLC:
148 *
149 * It works quite the same as transparent, except that HDLC data is forwarded
150 * to all other conference members if no hardware bridging is possible.
151 * Send data will be writte to sendq. Sendq will be sent if confirm is received.
152 * Conference cannot join, if one member is not hdlc.
153 *
154 */
155
156#include <linux/delay.h>
157#include <linux/mISDNif.h>
158#include <linux/mISDNdsp.h>
159#include <linux/module.h>
160#include <linux/vmalloc.h>
161#include "core.h"
162#include "dsp.h"
163
164const char *mISDN_dsp_revision = "2.0";
165
166static int debug;
167static int options;
168static int poll;
169static int dtmfthreshold = 100;
170
171MODULE_AUTHOR("Andreas Eversberg");
172module_param(debug, uint, S_IRUGO | S_IWUSR);
173module_param(options, uint, S_IRUGO | S_IWUSR);
174module_param(poll, uint, S_IRUGO | S_IWUSR);
175module_param(dtmfthreshold, uint, S_IRUGO | S_IWUSR);
176MODULE_LICENSE("GPL");
177
178/*int spinnest = 0;*/
179
180spinlock_t dsp_lock; /* global dsp lock */
181struct list_head dsp_ilist;
182struct list_head conf_ilist;
183int dsp_debug;
184int dsp_options;
185int dsp_poll, dsp_tics;
186
187/* check if rx may be turned off or must be turned on */
188static void
189dsp_rx_off_member(struct dsp *dsp)
190{
191 struct mISDN_ctrl_req cq;
192 int rx_off = 1;
193
194 if (!dsp->features_rx_off)
195 return;
196
197 /* not disabled */
198 if (!dsp->rx_disabled)
199 rx_off = 0;
200 /* software dtmf */
201 else if (dsp->dtmf.software)
202 rx_off = 0;
203 /* echo in software */
204 else if (dsp->echo && dsp->pcm_slot_tx < 0)
205 rx_off = 0;
206 /* bridge in software */
207 else if (dsp->conf) {
208 if (dsp->conf->software)
209 rx_off = 0;
210 }
211
212 if (rx_off == dsp->rx_is_off)
213 return;
214
215 if (!dsp->ch.peer) {
216 if (dsp_debug & DEBUG_DSP_CORE)
217 printk(KERN_DEBUG "%s: no peer, no rx_off\n",
218 __func__);
219 return;
220 }
221 cq.op = MISDN_CTRL_RX_OFF;
222 cq.p1 = rx_off;
223 if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) {
224 printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n",
225 __func__);
226 return;
227 }
228 dsp->rx_is_off = rx_off;
229 if (dsp_debug & DEBUG_DSP_CORE)
230 printk(KERN_DEBUG "%s: %s set rx_off = %d\n",
231 __func__, dsp->name, rx_off);
232}
233static void
234dsp_rx_off(struct dsp *dsp)
235{
236 struct dsp_conf_member *member;
237
238 if (dsp_options & DSP_OPT_NOHARDWARE)
239 return;
240
241 /* no conf */
242 if (!dsp->conf) {
243 dsp_rx_off_member(dsp);
244 return;
245 }
246 /* check all members in conf */
247 list_for_each_entry(member, &dsp->conf->mlist, list) {
248 dsp_rx_off_member(member->dsp);
249 }
250}
251
252static int
253dsp_control_req(struct dsp *dsp, struct mISDNhead *hh, struct sk_buff *skb)
254{
255 struct sk_buff *nskb;
256 int ret = 0;
257 int cont;
258 u8 *data;
259 int len;
260
261 if (skb->len < sizeof(int))
262 printk(KERN_ERR "%s: PH_CONTROL message too short\n", __func__);
263 cont = *((int *)skb->data);
264 len = skb->len - sizeof(int);
265 data = skb->data + sizeof(int);
266
267 switch (cont) {
268 case DTMF_TONE_START: /* turn on DTMF */
269 if (dsp->hdlc) {
270 ret = -EINVAL;
271 break;
272 }
273 if (dsp_debug & DEBUG_DSP_CORE)
274 printk(KERN_DEBUG "%s: start dtmf\n", __func__);
275 if (len == sizeof(int)) {
276 printk(KERN_NOTICE "changing DTMF Threshold "
277 "to %d\n", *((int *)data));
278 dsp->dtmf.treshold = (*(int *)data) * 10000;
279 }
280 /* init goertzel */
281 dsp_dtmf_goertzel_init(dsp);
282
283 /* check dtmf hardware */
284 dsp_dtmf_hardware(dsp);
285 break;
286 case DTMF_TONE_STOP: /* turn off DTMF */
287 if (dsp_debug & DEBUG_DSP_CORE)
288 printk(KERN_DEBUG "%s: stop dtmf\n", __func__);
289 dsp->dtmf.hardware = 0;
290 dsp->dtmf.software = 0;
291 break;
292 case DSP_CONF_JOIN: /* join / update conference */
293 if (len < sizeof(int)) {
294 ret = -EINVAL;
295 break;
296 }
297 if (*((u32 *)data) == 0)
298 goto conf_split;
299 if (dsp_debug & DEBUG_DSP_CORE)
300 printk(KERN_DEBUG "%s: join conference %d\n",
301 __func__, *((u32 *)data));
302 ret = dsp_cmx_conf(dsp, *((u32 *)data));
303 /* dsp_cmx_hardware will also be called here */
304 dsp_rx_off(dsp);
305 if (dsp_debug & DEBUG_DSP_CMX)
306 dsp_cmx_debug(dsp);
307 break;
308 case DSP_CONF_SPLIT: /* remove from conference */
309conf_split:
310 if (dsp_debug & DEBUG_DSP_CORE)
311 printk(KERN_DEBUG "%s: release conference\n", __func__);
312 ret = dsp_cmx_conf(dsp, 0);
313 /* dsp_cmx_hardware will also be called here */
314 if (dsp_debug & DEBUG_DSP_CMX)
315 dsp_cmx_debug(dsp);
316 dsp_rx_off(dsp);
317 break;
318 case DSP_TONE_PATT_ON: /* play tone */
319 if (dsp->hdlc) {
320 ret = -EINVAL;
321 break;
322 }
323 if (len < sizeof(int)) {
324 ret = -EINVAL;
325 break;
326 }
327 if (dsp_debug & DEBUG_DSP_CORE)
328 printk(KERN_DEBUG "%s: turn tone 0x%x on\n",
329 __func__, *((int *)skb->data));
330 ret = dsp_tone(dsp, *((int *)data));
331 if (!ret) {
332 dsp_cmx_hardware(dsp->conf, dsp);
333 dsp_rx_off(dsp);
334 }
335 if (!dsp->tone.tone)
336 goto tone_off;
337 break;
338 case DSP_TONE_PATT_OFF: /* stop tone */
339 if (dsp->hdlc) {
340 ret = -EINVAL;
341 break;
342 }
343 if (dsp_debug & DEBUG_DSP_CORE)
344 printk(KERN_DEBUG "%s: turn tone off\n", __func__);
345 dsp_tone(dsp, 0);
346 dsp_cmx_hardware(dsp->conf, dsp);
347 dsp_rx_off(dsp);
348 /* reset tx buffers (user space data) */
349tone_off:
350 dsp->rx_W = 0;
351 dsp->rx_R = 0;
352 break;
353 case DSP_VOL_CHANGE_TX: /* change volume */
354 if (dsp->hdlc) {
355 ret = -EINVAL;
356 break;
357 }
358 if (len < sizeof(int)) {
359 ret = -EINVAL;
360 break;
361 }
362 dsp->tx_volume = *((int *)data);
363 if (dsp_debug & DEBUG_DSP_CORE)
364 printk(KERN_DEBUG "%s: change tx vol to %d\n",
365 __func__, dsp->tx_volume);
366 dsp_cmx_hardware(dsp->conf, dsp);
367 dsp_dtmf_hardware(dsp);
368 dsp_rx_off(dsp);
369 break;
370 case DSP_VOL_CHANGE_RX: /* change volume */
371 if (dsp->hdlc) {
372 ret = -EINVAL;
373 break;
374 }
375 if (len < sizeof(int)) {
376 ret = -EINVAL;
377 break;
378 }
379 dsp->rx_volume = *((int *)data);
380 if (dsp_debug & DEBUG_DSP_CORE)
381 printk(KERN_DEBUG "%s: change rx vol to %d\n",
382 __func__, dsp->tx_volume);
383 dsp_cmx_hardware(dsp->conf, dsp);
384 dsp_dtmf_hardware(dsp);
385 dsp_rx_off(dsp);
386 break;
387 case DSP_ECHO_ON: /* enable echo */
388 dsp->echo = 1; /* soft echo */
389 if (dsp_debug & DEBUG_DSP_CORE)
390 printk(KERN_DEBUG "%s: enable cmx-echo\n", __func__);
391 dsp_cmx_hardware(dsp->conf, dsp);
392 dsp_rx_off(dsp);
393 if (dsp_debug & DEBUG_DSP_CMX)
394 dsp_cmx_debug(dsp);
395 break;
396 case DSP_ECHO_OFF: /* disable echo */
397 dsp->echo = 0;
398 if (dsp_debug & DEBUG_DSP_CORE)
399 printk(KERN_DEBUG "%s: disable cmx-echo\n", __func__);
400 dsp_cmx_hardware(dsp->conf, dsp);
401 dsp_rx_off(dsp);
402 if (dsp_debug & DEBUG_DSP_CMX)
403 dsp_cmx_debug(dsp);
404 break;
405 case DSP_RECEIVE_ON: /* enable receive to user space */
406 if (dsp_debug & DEBUG_DSP_CORE)
407 printk(KERN_DEBUG "%s: enable receive to user "
408 "space\n", __func__);
409 dsp->rx_disabled = 0;
410 dsp_rx_off(dsp);
411 break;
412 case DSP_RECEIVE_OFF: /* disable receive to user space */
413 if (dsp_debug & DEBUG_DSP_CORE)
414 printk(KERN_DEBUG "%s: disable receive to "
415 "user space\n", __func__);
416 dsp->rx_disabled = 1;
417 dsp_rx_off(dsp);
418 break;
419 case DSP_MIX_ON: /* enable mixing of tx data */
420 if (dsp->hdlc) {
421 ret = -EINVAL;
422 break;
423 }
424 if (dsp_debug & DEBUG_DSP_CORE)
425 printk(KERN_DEBUG "%s: enable mixing of "
426 "tx-data with conf mebers\n", __func__);
427 dsp->tx_mix = 1;
428 dsp_cmx_hardware(dsp->conf, dsp);
429 dsp_rx_off(dsp);
430 if (dsp_debug & DEBUG_DSP_CMX)
431 dsp_cmx_debug(dsp);
432 break;
433 case DSP_MIX_OFF: /* disable mixing of tx data */
434 if (dsp->hdlc) {
435 ret = -EINVAL;
436 break;
437 }
438 if (dsp_debug & DEBUG_DSP_CORE)
439 printk(KERN_DEBUG "%s: disable mixing of "
440 "tx-data with conf mebers\n", __func__);
441 dsp->tx_mix = 0;
442 dsp_cmx_hardware(dsp->conf, dsp);
443 dsp_rx_off(dsp);
444 if (dsp_debug & DEBUG_DSP_CMX)
445 dsp_cmx_debug(dsp);
446 break;
447 case DSP_TXDATA_ON: /* enable txdata */
448 dsp->tx_data = 1;
449 if (dsp_debug & DEBUG_DSP_CORE)
450 printk(KERN_DEBUG "%s: enable tx-data\n", __func__);
451 dsp_cmx_hardware(dsp->conf, dsp);
452 dsp_rx_off(dsp);
453 if (dsp_debug & DEBUG_DSP_CMX)
454 dsp_cmx_debug(dsp);
455 break;
456 case DSP_TXDATA_OFF: /* disable txdata */
457 dsp->tx_data = 0;
458 if (dsp_debug & DEBUG_DSP_CORE)
459 printk(KERN_DEBUG "%s: disable tx-data\n", __func__);
460 dsp_cmx_hardware(dsp->conf, dsp);
461 dsp_rx_off(dsp);
462 if (dsp_debug & DEBUG_DSP_CMX)
463 dsp_cmx_debug(dsp);
464 break;
465 case DSP_DELAY: /* use delay algorithm instead of dynamic
466 jitter algorithm */
467 if (dsp->hdlc) {
468 ret = -EINVAL;
469 break;
470 }
471 if (len < sizeof(int)) {
472 ret = -EINVAL;
473 break;
474 }
475 dsp->cmx_delay = (*((int *)data)) << 3;
476 /* miliseconds to samples */
477 if (dsp->cmx_delay >= (CMX_BUFF_HALF>>1))
478 /* clip to half of maximum usable buffer
479 (half of half buffer) */
480 dsp->cmx_delay = (CMX_BUFF_HALF>>1) - 1;
481 if (dsp_debug & DEBUG_DSP_CORE)
482 printk(KERN_DEBUG "%s: use delay algorithm to "
483 "compensate jitter (%d samples)\n",
484 __func__, dsp->cmx_delay);
485 break;
486 case DSP_JITTER: /* use dynamic jitter algorithm instead of
487 delay algorithm */
488 if (dsp->hdlc) {
489 ret = -EINVAL;
490 break;
491 }
492 dsp->cmx_delay = 0;
493 if (dsp_debug & DEBUG_DSP_CORE)
494 printk(KERN_DEBUG "%s: use jitter algorithm to "
495 "compensate jitter\n", __func__);
496 break;
497 case DSP_TX_DEJITTER: /* use dynamic jitter algorithm for tx-buffer */
498 if (dsp->hdlc) {
499 ret = -EINVAL;
500 break;
501 }
502 dsp->tx_dejitter = 1;
503 if (dsp_debug & DEBUG_DSP_CORE)
504 printk(KERN_DEBUG "%s: use dejitter on TX "
505 "buffer\n", __func__);
506 break;
507 case DSP_TX_DEJ_OFF: /* use tx-buffer without dejittering*/
508 if (dsp->hdlc) {
509 ret = -EINVAL;
510 break;
511 }
512 dsp->tx_dejitter = 0;
513 if (dsp_debug & DEBUG_DSP_CORE)
514 printk(KERN_DEBUG "%s: use TX buffer without "
515 "dejittering\n", __func__);
516 break;
517 case DSP_PIPELINE_CFG:
518 if (dsp->hdlc) {
519 ret = -EINVAL;
520 break;
521 }
522 if (len > 0 && ((char *)data)[len - 1]) {
523 printk(KERN_DEBUG "%s: pipeline config string "
524 "is not NULL terminated!\n", __func__);
525 ret = -EINVAL;
526 } else {
527 dsp->pipeline.inuse = 1;
528 dsp_cmx_hardware(dsp->conf, dsp);
529 ret = dsp_pipeline_build(&dsp->pipeline,
530 len > 0 ? (char *)data : NULL);
531 dsp_cmx_hardware(dsp->conf, dsp);
532 dsp_rx_off(dsp);
533 }
534 break;
535 case DSP_BF_ENABLE_KEY: /* turn blowfish on */
536 if (dsp->hdlc) {
537 ret = -EINVAL;
538 break;
539 }
540 if (len < 4 || len > 56) {
541 ret = -EINVAL;
542 break;
543 }
544 if (dsp_debug & DEBUG_DSP_CORE)
545 printk(KERN_DEBUG "%s: turn blowfish on (key "
546 "not shown)\n", __func__);
547 ret = dsp_bf_init(dsp, (u8 *)data, len);
548 /* set new cont */
549 if (!ret)
550 cont = DSP_BF_ACCEPT;
551 else
552 cont = DSP_BF_REJECT;
553 /* send indication if it worked to set it */
554 nskb = _alloc_mISDN_skb(PH_CONTROL_IND, MISDN_ID_ANY,
555 sizeof(int), &cont, GFP_ATOMIC);
556 if (nskb) {
557 if (dsp->up) {
558 if (dsp->up->send(dsp->up, nskb))
559 dev_kfree_skb(nskb);
560 } else
561 dev_kfree_skb(nskb);
562 }
563 if (!ret) {
564 dsp_cmx_hardware(dsp->conf, dsp);
565 dsp_dtmf_hardware(dsp);
566 dsp_rx_off(dsp);
567 }
568 break;
569 case DSP_BF_DISABLE: /* turn blowfish off */
570 if (dsp->hdlc) {
571 ret = -EINVAL;
572 break;
573 }
574 if (dsp_debug & DEBUG_DSP_CORE)
575 printk(KERN_DEBUG "%s: turn blowfish off\n", __func__);
576 dsp_bf_cleanup(dsp);
577 dsp_cmx_hardware(dsp->conf, dsp);
578 dsp_dtmf_hardware(dsp);
579 dsp_rx_off(dsp);
580 break;
581 default:
582 if (dsp_debug & DEBUG_DSP_CORE)
583 printk(KERN_DEBUG "%s: ctrl req %x unhandled\n",
584 __func__, cont);
585 ret = -EINVAL;
586 }
587 return ret;
588}
589
590static void
591get_features(struct mISDNchannel *ch)
592{
593 struct dsp *dsp = container_of(ch, struct dsp, ch);
594 struct mISDN_ctrl_req cq;
595
596 if (dsp_options & DSP_OPT_NOHARDWARE)
597 return;
598 if (!ch->peer) {
599 if (dsp_debug & DEBUG_DSP_CORE)
600 printk(KERN_DEBUG "%s: no peer, no features\n",
601 __func__);
602 return;
603 }
604 memset(&cq, 0, sizeof(cq));
605 cq.op = MISDN_CTRL_GETOP;
606 if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq) < 0) {
607 printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
608 __func__);
609 return;
610 }
611 if (cq.op & MISDN_CTRL_RX_OFF)
612 dsp->features_rx_off = 1;
613 if ((cq.op & MISDN_CTRL_HW_FEATURES_OP)) {
614 cq.op = MISDN_CTRL_HW_FEATURES;
615 *((u_long *)&cq.p1) = (u_long)&dsp->features;
616 if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq)) {
617 printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n",
618 __func__);
619 }
620 } else
621 if (dsp_debug & DEBUG_DSP_CORE)
622 printk(KERN_DEBUG "%s: features not supported for %s\n",
623 __func__, dsp->name);
624}
625
626static int
627dsp_function(struct mISDNchannel *ch, struct sk_buff *skb)
628{
629 struct dsp *dsp = container_of(ch, struct dsp, ch);
630 struct mISDNhead *hh;
631 int ret = 0;
632 u8 *digits;
633 int cont;
634 struct sk_buff *nskb;
635 u_long flags;
636
637 hh = mISDN_HEAD_P(skb);
638 switch (hh->prim) {
639 /* FROM DOWN */
640 case (PH_DATA_CNF):
641 dsp->data_pending = 0;
642 /* trigger next hdlc frame, if any */
643 if (dsp->hdlc) {
644 spin_lock_irqsave(&dsp_lock, flags);
645 if (dsp->b_active)
646 schedule_work(&dsp->workq);
647 spin_unlock_irqrestore(&dsp_lock, flags);
648 }
649 break;
650 case (PH_DATA_IND):
651 case (DL_DATA_IND):
652 if (skb->len < 1) {
653 ret = -EINVAL;
654 break;
655 }
656 if (dsp->rx_is_off) {
657 if (dsp_debug & DEBUG_DSP_CORE)
658 printk(KERN_DEBUG "%s: rx-data during rx_off"
659 " for %s\n",
660 __func__, dsp->name);
661 }
662 if (dsp->hdlc) {
663 /* hdlc */
664 spin_lock_irqsave(&dsp_lock, flags);
665 dsp_cmx_hdlc(dsp, skb);
666 spin_unlock_irqrestore(&dsp_lock, flags);
667 if (dsp->rx_disabled) {
668 /* if receive is not allowed */
669 break;
670 }
671 hh->prim = DL_DATA_IND;
672 if (dsp->up)
673 return dsp->up->send(dsp->up, skb);
674 break;
675 }
676
677 /* decrypt if enabled */
678 if (dsp->bf_enable)
679 dsp_bf_decrypt(dsp, skb->data, skb->len);
680 /* pipeline */
681 if (dsp->pipeline.inuse)
682 dsp_pipeline_process_rx(&dsp->pipeline, skb->data,
683 skb->len);
684 /* change volume if requested */
685 if (dsp->rx_volume)
686 dsp_change_volume(skb, dsp->rx_volume);
687
688 /* check if dtmf soft decoding is turned on */
689 if (dsp->dtmf.software) {
690 digits = dsp_dtmf_goertzel_decode(dsp, skb->data,
691 skb->len, (dsp_options&DSP_OPT_ULAW)?1:0);
692 while (*digits) {
693 if (dsp_debug & DEBUG_DSP_DTMF)
694 printk(KERN_DEBUG "%s: digit"
695 "(%c) to layer %s\n",
696 __func__, *digits, dsp->name);
697 cont = DTMF_TONE_VAL | *digits;
698 nskb = _alloc_mISDN_skb(PH_CONTROL_IND,
699 MISDN_ID_ANY, sizeof(int), &cont,
700 GFP_ATOMIC);
701 if (nskb) {
702 if (dsp->up) {
703 if (dsp->up->send(
704 dsp->up, nskb))
705 dev_kfree_skb(nskb);
706 } else
707 dev_kfree_skb(nskb);
708 }
709 digits++;
710 }
711 }
712 /* we need to process receive data if software */
713 spin_lock_irqsave(&dsp_lock, flags);
714 if (dsp->pcm_slot_tx < 0 && dsp->pcm_slot_rx < 0) {
715 /* process data from card at cmx */
716 dsp_cmx_receive(dsp, skb);
717 }
718 spin_unlock_irqrestore(&dsp_lock, flags);
719
720 if (dsp->rx_disabled) {
721 /* if receive is not allowed */
722 break;
723 }
724 hh->prim = DL_DATA_IND;
725 if (dsp->up)
726 return dsp->up->send(dsp->up, skb);
727 break;
728 case (PH_CONTROL_IND):
729 if (dsp_debug & DEBUG_DSP_DTMFCOEFF)
730 printk(KERN_DEBUG "%s: PH_CONTROL INDICATION "
731 "received: %x (len %d) %s\n", __func__,
732 hh->id, skb->len, dsp->name);
733 switch (hh->id) {
734 case (DTMF_HFC_COEF): /* getting coefficients */
735 if (!dsp->dtmf.hardware) {
736 if (dsp_debug & DEBUG_DSP_DTMFCOEFF)
737 printk(KERN_DEBUG "%s: ignoring DTMF "
738 "coefficients from HFC\n",
739 __func__);
740 break;
741 }
742 digits = dsp_dtmf_goertzel_decode(dsp, skb->data,
743 skb->len, 2);
744 while (*digits) {
745 int k;
746 struct sk_buff *nskb;
747 if (dsp_debug & DEBUG_DSP_DTMF)
748 printk(KERN_DEBUG "%s: digit"
749 "(%c) to layer %s\n",
750 __func__, *digits, dsp->name);
751 k = *digits | DTMF_TONE_VAL;
752 nskb = _alloc_mISDN_skb(PH_CONTROL_IND,
753 MISDN_ID_ANY, sizeof(int), &k,
754 GFP_ATOMIC);
755 if (nskb) {
756 if (dsp->up) {
757 if (dsp->up->send(
758 dsp->up, nskb))
759 dev_kfree_skb(nskb);
760 } else
761 dev_kfree_skb(nskb);
762 }
763 digits++;
764 }
765 break;
766 case (HFC_VOL_CHANGE_TX): /* change volume */
767 if (skb->len != sizeof(int)) {
768 ret = -EINVAL;
769 break;
770 }
771 spin_lock_irqsave(&dsp_lock, flags);
772 dsp->tx_volume = *((int *)skb->data);
773 if (dsp_debug & DEBUG_DSP_CORE)
774 printk(KERN_DEBUG "%s: change tx volume to "
775 "%d\n", __func__, dsp->tx_volume);
776 dsp_cmx_hardware(dsp->conf, dsp);
777 dsp_dtmf_hardware(dsp);
778 dsp_rx_off(dsp);
779 spin_unlock_irqrestore(&dsp_lock, flags);
780 break;
781 default:
782 if (dsp_debug & DEBUG_DSP_CORE)
783 printk(KERN_DEBUG "%s: ctrl ind %x unhandled "
784 "%s\n", __func__, hh->id, dsp->name);
785 ret = -EINVAL;
786 }
787 break;
788 case (PH_ACTIVATE_IND):
789 case (PH_ACTIVATE_CNF):
790 if (dsp_debug & DEBUG_DSP_CORE)
791 printk(KERN_DEBUG "%s: b_channel is now active %s\n",
792 __func__, dsp->name);
793 /* bchannel now active */
794 spin_lock_irqsave(&dsp_lock, flags);
795 dsp->b_active = 1;
796 dsp->data_pending = 0;
797 dsp->rx_init = 1;
798 /* rx_W and rx_R will be adjusted on first frame */
799 dsp->rx_W = 0;
800 dsp->rx_R = 0;
801 memset(dsp->rx_buff, 0, sizeof(dsp->rx_buff));
802 dsp_cmx_hardware(dsp->conf, dsp);
803 dsp_dtmf_hardware(dsp);
804 dsp_rx_off(dsp);
805 spin_unlock_irqrestore(&dsp_lock, flags);
806 if (dsp_debug & DEBUG_DSP_CORE)
807 printk(KERN_DEBUG "%s: done with activation, sending "
808 "confirm to user space. %s\n", __func__,
809 dsp->name);
810 /* send activation to upper layer */
811 hh->prim = DL_ESTABLISH_CNF;
812 if (dsp->up)
813 return dsp->up->send(dsp->up, skb);
814 break;
815 case (PH_DEACTIVATE_IND):
816 case (PH_DEACTIVATE_CNF):
817 if (dsp_debug & DEBUG_DSP_CORE)
818 printk(KERN_DEBUG "%s: b_channel is now inactive %s\n",
819 __func__, dsp->name);
820 /* bchannel now inactive */
821 spin_lock_irqsave(&dsp_lock, flags);
822 dsp->b_active = 0;
823 dsp->data_pending = 0;
824 dsp_cmx_hardware(dsp->conf, dsp);
825 dsp_rx_off(dsp);
826 spin_unlock_irqrestore(&dsp_lock, flags);
827 hh->prim = DL_RELEASE_CNF;
828 if (dsp->up)
829 return dsp->up->send(dsp->up, skb);
830 break;
831 /* FROM UP */
832 case (DL_DATA_REQ):
833 case (PH_DATA_REQ):
834 if (skb->len < 1) {
835 ret = -EINVAL;
836 break;
837 }
838 if (dsp->hdlc) {
839 /* hdlc */
840 spin_lock_irqsave(&dsp_lock, flags);
841 if (dsp->b_active) {
842 skb_queue_tail(&dsp->sendq, skb);
843 schedule_work(&dsp->workq);
844 }
845 spin_unlock_irqrestore(&dsp_lock, flags);
846 return 0;
847 }
848 /* send data to tx-buffer (if no tone is played) */
849 if (!dsp->tone.tone) {
850 spin_lock_irqsave(&dsp_lock, flags);
851 dsp_cmx_transmit(dsp, skb);
852 spin_unlock_irqrestore(&dsp_lock, flags);
853 }
854 break;
855 case (PH_CONTROL_REQ):
856 spin_lock_irqsave(&dsp_lock, flags);
857 ret = dsp_control_req(dsp, hh, skb);
858 spin_unlock_irqrestore(&dsp_lock, flags);
859 break;
860 case (DL_ESTABLISH_REQ):
861 case (PH_ACTIVATE_REQ):
862 if (dsp_debug & DEBUG_DSP_CORE)
863 printk(KERN_DEBUG "%s: activating b_channel %s\n",
864 __func__, dsp->name);
865 if (dsp->dtmf.hardware || dsp->dtmf.software)
866 dsp_dtmf_goertzel_init(dsp);
867 get_features(ch);
868 /* send ph_activate */
869 hh->prim = PH_ACTIVATE_REQ;
870 if (ch->peer)
871 return ch->recv(ch->peer, skb);
872 break;
873 case (DL_RELEASE_REQ):
874 case (PH_DEACTIVATE_REQ):
875 if (dsp_debug & DEBUG_DSP_CORE)
876 printk(KERN_DEBUG "%s: releasing b_channel %s\n",
877 __func__, dsp->name);
878 spin_lock_irqsave(&dsp_lock, flags);
879 dsp->tone.tone = 0;
880 dsp->tone.hardware = 0;
881 dsp->tone.software = 0;
882 if (timer_pending(&dsp->tone.tl))
883 del_timer(&dsp->tone.tl);
884 if (dsp->conf)
885 dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be
886 called here */
887 skb_queue_purge(&dsp->sendq);
888 spin_unlock_irqrestore(&dsp_lock, flags);
889 hh->prim = PH_DEACTIVATE_REQ;
890 if (ch->peer)
891 return ch->recv(ch->peer, skb);
892 break;
893 default:
894 if (dsp_debug & DEBUG_DSP_CORE)
895 printk(KERN_DEBUG "%s: msg %x unhandled %s\n",
896 __func__, hh->prim, dsp->name);
897 ret = -EINVAL;
898 }
899 if (!ret)
900 dev_kfree_skb(skb);
901 return ret;
902}
903
904static int
905dsp_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
906{
907 struct dsp *dsp = container_of(ch, struct dsp, ch);
908 u_long flags;
909 int err = 0;
910
911 if (debug & DEBUG_DSP_CTRL)
912 printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd);
913
914 switch (cmd) {
915 case OPEN_CHANNEL:
916 break;
917 case CLOSE_CHANNEL:
918 if (dsp->ch.peer)
919 dsp->ch.peer->ctrl(dsp->ch.peer, CLOSE_CHANNEL, NULL);
920
921 /* wait until workqueue has finished,
922 * must lock here, or we may hit send-process currently
923 * queueing. */
924 spin_lock_irqsave(&dsp_lock, flags);
925 dsp->b_active = 0;
926 spin_unlock_irqrestore(&dsp_lock, flags);
927 /* MUST not be locked, because it waits until queue is done. */
928 cancel_work_sync(&dsp->workq);
929 spin_lock_irqsave(&dsp_lock, flags);
930 if (timer_pending(&dsp->tone.tl))
931 del_timer(&dsp->tone.tl);
932 skb_queue_purge(&dsp->sendq);
933 if (dsp_debug & DEBUG_DSP_CTRL)
934 printk(KERN_DEBUG "%s: releasing member %s\n",
935 __func__, dsp->name);
936 dsp->b_active = 0;
937 dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be called
938 here */
939 dsp_pipeline_destroy(&dsp->pipeline);
940
941 if (dsp_debug & DEBUG_DSP_CTRL)
942 printk(KERN_DEBUG "%s: remove & destroy object %s\n",
943 __func__, dsp->name);
944 list_del(&dsp->list);
945 spin_unlock_irqrestore(&dsp_lock, flags);
946
947 if (dsp_debug & DEBUG_DSP_CTRL)
948 printk(KERN_DEBUG "%s: dsp instance released\n",
949 __func__);
950 vfree(dsp);
951 module_put(THIS_MODULE);
952 break;
953 }
954 return err;
955}
956
957static void
958dsp_send_bh(struct work_struct *work)
959{
960 struct dsp *dsp = container_of(work, struct dsp, workq);
961 struct sk_buff *skb;
962 struct mISDNhead *hh;
963
964 if (dsp->hdlc && dsp->data_pending)
965 return; /* wait until data has been acknowledged */
966
967 /* send queued data */
968 while ((skb = skb_dequeue(&dsp->sendq))) {
969 /* in locked date, we must have still data in queue */
970 if (dsp->data_pending) {
971 if (dsp_debug & DEBUG_DSP_CORE)
972 printk(KERN_DEBUG "%s: fifo full %s, this is "
973 "no bug!\n", __func__, dsp->name);
974 /* flush transparent data, if not acked */
975 dev_kfree_skb(skb);
976 continue;
977 }
978 hh = mISDN_HEAD_P(skb);
979 if (hh->prim == DL_DATA_REQ) {
980 /* send packet up */
981 if (dsp->up) {
982 if (dsp->up->send(dsp->up, skb))
983 dev_kfree_skb(skb);
984 } else
985 dev_kfree_skb(skb);
986 } else {
987 /* send packet down */
988 if (dsp->ch.peer) {
989 dsp->data_pending = 1;
990 if (dsp->ch.recv(dsp->ch.peer, skb)) {
991 dev_kfree_skb(skb);
992 dsp->data_pending = 0;
993 }
994 } else
995 dev_kfree_skb(skb);
996 }
997 }
998}
999
1000static int
1001dspcreate(struct channel_req *crq)
1002{
1003 struct dsp *ndsp;
1004 u_long flags;
1005
1006 if (crq->protocol != ISDN_P_B_L2DSP
1007 && crq->protocol != ISDN_P_B_L2DSPHDLC)
1008 return -EPROTONOSUPPORT;
1009 ndsp = vmalloc(sizeof(struct dsp));
1010 if (!ndsp) {
1011 printk(KERN_ERR "%s: vmalloc struct dsp failed\n", __func__);
1012 return -ENOMEM;
1013 }
1014 memset(ndsp, 0, sizeof(struct dsp));
1015 if (dsp_debug & DEBUG_DSP_CTRL)
1016 printk(KERN_DEBUG "%s: creating new dsp instance\n", __func__);
1017
1018 /* default enabled */
1019 INIT_WORK(&ndsp->workq, (void *)dsp_send_bh);
1020 skb_queue_head_init(&ndsp->sendq);
1021 ndsp->ch.send = dsp_function;
1022 ndsp->ch.ctrl = dsp_ctrl;
1023 ndsp->up = crq->ch;
1024 crq->ch = &ndsp->ch;
1025 if (crq->protocol == ISDN_P_B_L2DSP) {
1026 crq->protocol = ISDN_P_B_RAW;
1027 ndsp->hdlc = 0;
1028 } else {
1029 crq->protocol = ISDN_P_B_HDLC;
1030 ndsp->hdlc = 1;
1031 }
1032 if (!try_module_get(THIS_MODULE))
1033 printk(KERN_WARNING "%s:cannot get module\n",
1034 __func__);
1035
1036 sprintf(ndsp->name, "DSP_C%x(0x%p)",
1037 ndsp->up->st->dev->id + 1, ndsp);
1038 /* set frame size to start */
1039 ndsp->features.hfc_id = -1; /* current PCM id */
1040 ndsp->features.pcm_id = -1; /* current PCM id */
1041 ndsp->pcm_slot_rx = -1; /* current CPM slot */
1042 ndsp->pcm_slot_tx = -1;
1043 ndsp->pcm_bank_rx = -1;
1044 ndsp->pcm_bank_tx = -1;
1045 ndsp->hfc_conf = -1; /* current conference number */
1046 /* set tone timer */
1047 ndsp->tone.tl.function = (void *)dsp_tone_timeout;
1048 ndsp->tone.tl.data = (long) ndsp;
1049 init_timer(&ndsp->tone.tl);
1050
1051 if (dtmfthreshold < 20 || dtmfthreshold > 500)
1052 dtmfthreshold = 200;
1053 ndsp->dtmf.treshold = dtmfthreshold*10000;
1054
1055 /* init pipeline append to list */
1056 spin_lock_irqsave(&dsp_lock, flags);
1057 dsp_pipeline_init(&ndsp->pipeline);
1058 list_add_tail(&ndsp->list, &dsp_ilist);
1059 spin_unlock_irqrestore(&dsp_lock, flags);
1060
1061 return 0;
1062}
1063
1064
1065static struct Bprotocol DSP = {
1066 .Bprotocols = (1 << (ISDN_P_B_L2DSP & ISDN_P_B_MASK))
1067 | (1 << (ISDN_P_B_L2DSPHDLC & ISDN_P_B_MASK)),
1068 .name = "dsp",
1069 .create = dspcreate
1070};
1071
1072static int dsp_init(void)
1073{
1074 int err;
1075 int tics;
1076
1077 printk(KERN_INFO "DSP modul %s\n", mISDN_dsp_revision);
1078
1079 dsp_options = options;
1080 dsp_debug = debug;
1081
1082 /* set packet size */
1083 dsp_poll = poll;
1084 if (dsp_poll) {
1085 if (dsp_poll > MAX_POLL) {
1086 printk(KERN_ERR "%s: Wrong poll value (%d), use %d "
1087 "maximum.\n", __func__, poll, MAX_POLL);
1088 err = -EINVAL;
1089 return err;
1090 }
1091 if (dsp_poll < 8) {
1092 printk(KERN_ERR "%s: Wrong poll value (%d), use 8 "
1093 "minimum.\n", __func__, dsp_poll);
1094 err = -EINVAL;
1095 return err;
1096 }
1097 dsp_tics = poll * HZ / 8000;
1098 if (dsp_tics * 8000 != poll * HZ) {
1099 printk(KERN_INFO "mISDN_dsp: Cannot clock every %d "
1100 "samples (0,125 ms). It is not a multiple of "
1101 "%d HZ.\n", poll, HZ);
1102 err = -EINVAL;
1103 return err;
1104 }
1105 } else {
1106 poll = 8;
1107 while (poll <= MAX_POLL) {
1108 tics = poll * HZ / 8000;
1109 if (tics * 8000 == poll * HZ) {
1110 dsp_tics = tics;
1111 dsp_poll = poll;
1112 if (poll >= 64)
1113 break;
1114 }
1115 poll++;
1116 }
1117 }
1118 if (dsp_poll == 0) {
1119 printk(KERN_INFO "mISDN_dsp: There is no multiple of kernel "
1120 "clock that equals exactly the duration of 8-256 "
1121 "samples. (Choose kernel clock speed like 100, 250, "
1122 "300, 1000)\n");
1123 err = -EINVAL;
1124 return err;
1125 }
1126 printk(KERN_INFO "mISDN_dsp: DSP clocks every %d samples. This equals "
1127 "%d jiffies.\n", dsp_poll, dsp_tics);
1128
1129 spin_lock_init(&dsp_lock);
1130 INIT_LIST_HEAD(&dsp_ilist);
1131 INIT_LIST_HEAD(&conf_ilist);
1132
1133 /* init conversion tables */
1134 dsp_audio_generate_law_tables();
1135 dsp_silence = (dsp_options&DSP_OPT_ULAW)?0xff:0x2a;
1136 dsp_audio_law_to_s32 = (dsp_options&DSP_OPT_ULAW)?dsp_audio_ulaw_to_s32:
1137 dsp_audio_alaw_to_s32;
1138 dsp_audio_generate_s2law_table();
1139 dsp_audio_generate_seven();
1140 dsp_audio_generate_mix_table();
1141 if (dsp_options & DSP_OPT_ULAW)
1142 dsp_audio_generate_ulaw_samples();
1143 dsp_audio_generate_volume_changes();
1144
1145 err = dsp_pipeline_module_init();
1146 if (err) {
1147 printk(KERN_ERR "mISDN_dsp: Can't initialize pipeline, "
1148 "error(%d)\n", err);
1149 return err;
1150 }
1151
1152 err = mISDN_register_Bprotocol(&DSP);
1153 if (err) {
1154 printk(KERN_ERR "Can't register %s error(%d)\n", DSP.name, err);
1155 return err;
1156 }
1157
1158 /* set sample timer */
1159 dsp_spl_tl.function = (void *)dsp_cmx_send;
1160 dsp_spl_tl.data = 0;
1161 init_timer(&dsp_spl_tl);
1162 dsp_spl_tl.expires = jiffies + dsp_tics;
1163 dsp_spl_jiffies = dsp_spl_tl.expires;
1164 add_timer(&dsp_spl_tl);
1165
1166 return 0;
1167}
1168
1169
1170static void dsp_cleanup(void)
1171{
1172 mISDN_unregister_Bprotocol(&DSP);
1173
1174 if (timer_pending(&dsp_spl_tl))
1175 del_timer(&dsp_spl_tl);
1176
1177 if (!list_empty(&dsp_ilist)) {
1178 printk(KERN_ERR "mISDN_dsp: Audio DSP object inst list not "
1179 "empty.\n");
1180 }
1181 if (!list_empty(&conf_ilist)) {
1182 printk(KERN_ERR "mISDN_dsp: Conference list not empty. Not "
1183 "all memory freed.\n");
1184 }
1185
1186 dsp_pipeline_module_exit();
1187}
1188
1189module_init(dsp_init);
1190module_exit(dsp_cleanup);
1191
diff --git a/drivers/isdn/mISDN/dsp_dtmf.c b/drivers/isdn/mISDN/dsp_dtmf.c
new file mode 100644
index 000000000000..efc371c1f0dc
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_dtmf.c
@@ -0,0 +1,303 @@
1/*
2 * DTMF decoder.
3 *
4 * Copyright by Andreas Eversberg (jolly@eversberg.eu)
5 * based on different decoders such as ISDN4Linux
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11
12#include <linux/mISDNif.h>
13#include <linux/mISDNdsp.h>
14#include "core.h"
15#include "dsp.h"
16
17#define NCOEFF 8 /* number of frequencies to be analyzed */
18
19/* For DTMF recognition:
20 * 2 * cos(2 * PI * k / N) precalculated for all k
21 */
22static u64 cos2pik[NCOEFF] =
23{
24 /* k << 15 (source: hfc-4s/8s documentation (www.colognechip.de)) */
25 55960, 53912, 51402, 48438, 38146, 32650, 26170, 18630
26};
27
28/* digit matrix */
29static char dtmf_matrix[4][4] =
30{
31 {'1', '2', '3', 'A'},
32 {'4', '5', '6', 'B'},
33 {'7', '8', '9', 'C'},
34 {'*', '0', '#', 'D'}
35};
36
37/* dtmf detection using goertzel algorithm
38 * init function
39 */
40void dsp_dtmf_goertzel_init(struct dsp *dsp)
41{
42 dsp->dtmf.size = 0;
43 dsp->dtmf.lastwhat = '\0';
44 dsp->dtmf.lastdigit = '\0';
45 dsp->dtmf.count = 0;
46}
47
48/* check for hardware or software features
49 */
50void dsp_dtmf_hardware(struct dsp *dsp)
51{
52 int hardware = 1;
53
54 if (!dsp->features.hfc_dtmf)
55 hardware = 0;
56
57 /* check for volume change */
58 if (dsp->tx_volume) {
59 if (dsp_debug & DEBUG_DSP_DTMF)
60 printk(KERN_DEBUG "%s dsp %s cannot do hardware DTMF, "
61 "because tx_volume is changed\n",
62 __func__, dsp->name);
63 hardware = 0;
64 }
65 if (dsp->rx_volume) {
66 if (dsp_debug & DEBUG_DSP_DTMF)
67 printk(KERN_DEBUG "%s dsp %s cannot do hardware DTMF, "
68 "because rx_volume is changed\n",
69 __func__, dsp->name);
70 hardware = 0;
71 }
72 /* check if encryption is enabled */
73 if (dsp->bf_enable) {
74 if (dsp_debug & DEBUG_DSP_DTMF)
75 printk(KERN_DEBUG "%s dsp %s cannot do hardware DTMF, "
76 "because encryption is enabled\n",
77 __func__, dsp->name);
78 hardware = 0;
79 }
80 /* check if pipeline exists */
81 if (dsp->pipeline.inuse) {
82 if (dsp_debug & DEBUG_DSP_DTMF)
83 printk(KERN_DEBUG "%s dsp %s cannot do hardware DTMF, "
84 "because pipeline exists.\n",
85 __func__, dsp->name);
86 hardware = 0;
87 }
88
89 dsp->dtmf.hardware = hardware;
90 dsp->dtmf.software = !hardware;
91}
92
93
94/*************************************************************
95 * calculate the coefficients of the given sample and decode *
96 *************************************************************/
97
98/* the given sample is decoded. if the sample is not long enough for a
99 * complete frame, the decoding is finished and continued with the next
100 * call of this function.
101 *
102 * the algorithm is very good for detection with a minimum of errors. i
103 * tested it allot. it even works with very short tones (40ms). the only
104 * disadvantage is, that it doesn't work good with different volumes of both
105 * tones. this will happen, if accoustically coupled dialers are used.
106 * it sometimes detects tones during speach, which is normal for decoders.
107 * use sequences to given commands during calls.
108 *
109 * dtmf - points to a structure of the current dtmf state
110 * spl and len - the sample
111 * fmt - 0 = alaw, 1 = ulaw, 2 = coefficients from HFC DTMF hw-decoder
112 */
113
114u8
115*dsp_dtmf_goertzel_decode(struct dsp *dsp, u8 *data, int len, int fmt)
116{
117 u8 what;
118 int size;
119 signed short *buf;
120 s32 sk, sk1, sk2;
121 int k, n, i;
122 s32 *hfccoeff;
123 s32 result[NCOEFF], tresh, treshl;
124 int lowgroup, highgroup;
125 s64 cos2pik_;
126
127 dsp->dtmf.digits[0] = '\0';
128
129 /* Note: The function will loop until the buffer has not enough samples
130 * left to decode a full frame.
131 */
132again:
133 /* convert samples */
134 size = dsp->dtmf.size;
135 buf = dsp->dtmf.buffer;
136 switch (fmt) {
137 case 0: /* alaw */
138 case 1: /* ulaw */
139 while (size < DSP_DTMF_NPOINTS && len) {
140 buf[size++] = dsp_audio_law_to_s32[*data++];
141 len--;
142 }
143 break;
144
145 case 2: /* HFC coefficients */
146 default:
147 if (len < 64) {
148 if (len > 0)
149 printk(KERN_ERR "%s: coefficients have invalid "
150 "size. (is=%d < must=%d)\n",
151 __func__, len, 64);
152 return dsp->dtmf.digits;
153 }
154 hfccoeff = (s32 *)data;
155 for (k = 0; k < NCOEFF; k++) {
156 sk2 = (*hfccoeff++)>>4;
157 sk = (*hfccoeff++)>>4;
158 if (sk > 32767 || sk < -32767 || sk2 > 32767
159 || sk2 < -32767)
160 printk(KERN_WARNING
161 "DTMF-Detection overflow\n");
162 /* compute |X(k)|**2 */
163 result[k] =
164 (sk * sk) -
165 (((cos2pik[k] * sk) >> 15) * sk2) +
166 (sk2 * sk2);
167 }
168 data += 64;
169 len -= 64;
170 goto coefficients;
171 break;
172 }
173 dsp->dtmf.size = size;
174
175 if (size < DSP_DTMF_NPOINTS)
176 return dsp->dtmf.digits;
177
178 dsp->dtmf.size = 0;
179
180 /* now we have a full buffer of signed long samples - we do goertzel */
181 for (k = 0; k < NCOEFF; k++) {
182 sk = 0;
183 sk1 = 0;
184 sk2 = 0;
185 buf = dsp->dtmf.buffer;
186 cos2pik_ = cos2pik[k];
187 for (n = 0; n < DSP_DTMF_NPOINTS; n++) {
188 sk = ((cos2pik_*sk1)>>15) - sk2 + (*buf++);
189 sk2 = sk1;
190 sk1 = sk;
191 }
192 sk >>= 8;
193 sk2 >>= 8;
194 if (sk > 32767 || sk < -32767 || sk2 > 32767 || sk2 < -32767)
195 printk(KERN_WARNING "DTMF-Detection overflow\n");
196 /* compute |X(k)|**2 */
197 result[k] =
198 (sk * sk) -
199 (((cos2pik[k] * sk) >> 15) * sk2) +
200 (sk2 * sk2);
201 }
202
203 /* our (squared) coefficients have been calculated, we need to process
204 * them.
205 */
206coefficients:
207 tresh = 0;
208 for (i = 0; i < NCOEFF; i++) {
209 if (result[i] < 0)
210 result[i] = 0;
211 if (result[i] > dsp->dtmf.treshold) {
212 if (result[i] > tresh)
213 tresh = result[i];
214 }
215 }
216
217 if (tresh == 0) {
218 what = 0;
219 goto storedigit;
220 }
221
222 if (dsp_debug & DEBUG_DSP_DTMFCOEFF)
223 printk(KERN_DEBUG "a %3d %3d %3d %3d %3d %3d %3d %3d"
224 " tr:%3d r %3d %3d %3d %3d %3d %3d %3d %3d\n",
225 result[0]/10000, result[1]/10000, result[2]/10000,
226 result[3]/10000, result[4]/10000, result[5]/10000,
227 result[6]/10000, result[7]/10000, tresh/10000,
228 result[0]/(tresh/100), result[1]/(tresh/100),
229 result[2]/(tresh/100), result[3]/(tresh/100),
230 result[4]/(tresh/100), result[5]/(tresh/100),
231 result[6]/(tresh/100), result[7]/(tresh/100));
232
233 /* calc digit (lowgroup/highgroup) */
234 lowgroup = -1;
235 highgroup = -1;
236 treshl = tresh >> 3; /* tones which are not on, must be below 9 dB */
237 tresh = tresh >> 2; /* touchtones must match within 6 dB */
238 for (i = 0; i < NCOEFF; i++) {
239 if (result[i] < treshl)
240 continue; /* ignore */
241 if (result[i] < tresh) {
242 lowgroup = -1;
243 highgroup = -1;
244 break; /* noise inbetween */
245 }
246 /* good level found. This is allowed only one time per group */
247 if (i < NCOEFF/2) {
248 /* lowgroup */
249 if (lowgroup >= 0) {
250 /* Bad. Another tone found. */
251 lowgroup = -1;
252 break;
253 } else
254 lowgroup = i;
255 } else {
256 /* higroup */
257 if (highgroup >= 0) {
258 /* Bad. Another tone found. */
259 highgroup = -1;
260 break;
261 } else
262 highgroup = i-(NCOEFF/2);
263 }
264 }
265
266 /* get digit or null */
267 what = 0;
268 if (lowgroup >= 0 && highgroup >= 0)
269 what = dtmf_matrix[lowgroup][highgroup];
270
271storedigit:
272 if (what && (dsp_debug & DEBUG_DSP_DTMF))
273 printk(KERN_DEBUG "DTMF what: %c\n", what);
274
275 if (dsp->dtmf.lastwhat != what)
276 dsp->dtmf.count = 0;
277
278 /* the tone (or no tone) must remain 3 times without change */
279 if (dsp->dtmf.count == 2) {
280 if (dsp->dtmf.lastdigit != what) {
281 dsp->dtmf.lastdigit = what;
282 if (what) {
283 if (dsp_debug & DEBUG_DSP_DTMF)
284 printk(KERN_DEBUG "DTMF digit: %c\n",
285 what);
286 if ((strlen(dsp->dtmf.digits)+1)
287 < sizeof(dsp->dtmf.digits)) {
288 dsp->dtmf.digits[strlen(
289 dsp->dtmf.digits)+1] = '\0';
290 dsp->dtmf.digits[strlen(
291 dsp->dtmf.digits)] = what;
292 }
293 }
294 }
295 } else
296 dsp->dtmf.count++;
297
298 dsp->dtmf.lastwhat = what;
299
300 goto again;
301}
302
303
diff --git a/drivers/isdn/mISDN/dsp_ecdis.h b/drivers/isdn/mISDN/dsp_ecdis.h
new file mode 100644
index 000000000000..8a20af43308b
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_ecdis.h
@@ -0,0 +1,110 @@
1/*
2 * SpanDSP - a series of DSP components for telephony
3 *
4 * ec_disable_detector.h - A detector which should eventually meet the
5 * G.164/G.165 requirements for detecting the
6 * 2100Hz echo cancellor disable tone.
7 *
8 * Written by Steve Underwood <steveu@coppice.org>
9 *
10 * Copyright (C) 2001 Steve Underwood
11 *
12 * All rights reserved.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 */
29
30#include "dsp_biquad.h"
31
32struct ec_disable_detector_state {
33 struct biquad2_state notch;
34 int notch_level;
35 int channel_level;
36 int tone_present;
37 int tone_cycle_duration;
38 int good_cycles;
39 int hit;
40};
41
42
43#define FALSE 0
44#define TRUE (!FALSE)
45
46static inline void
47echo_can_disable_detector_init(struct ec_disable_detector_state *det)
48{
49 /* Elliptic notch */
50 /* This is actually centred at 2095Hz, but gets the balance we want, due
51 to the asymmetric walls of the notch */
52 biquad2_init(&det->notch,
53 (int32_t) (-0.7600000*32768.0),
54 (int32_t) (-0.1183852*32768.0),
55 (int32_t) (-0.5104039*32768.0),
56 (int32_t) (0.1567596*32768.0),
57 (int32_t) (1.0000000*32768.0));
58
59 det->channel_level = 0;
60 det->notch_level = 0;
61 det->tone_present = FALSE;
62 det->tone_cycle_duration = 0;
63 det->good_cycles = 0;
64 det->hit = 0;
65}
66/*- End of function --------------------------------------------------------*/
67
68static inline int
69echo_can_disable_detector_update(struct ec_disable_detector_state *det,
70int16_t amp)
71{
72 int16_t notched;
73
74 notched = biquad2(&det->notch, amp);
75 /* Estimate the overall energy in the channel, and the energy in
76 the notch (i.e. overall channel energy - tone energy => noise).
77 Use abs instead of multiply for speed (is it really faster?).
78 Damp the overall energy a little more for a stable result.
79 Damp the notch energy a little less, so we don't damp out the
80 blip every time the phase reverses */
81 det->channel_level += ((abs(amp) - det->channel_level) >> 5);
82 det->notch_level += ((abs(notched) - det->notch_level) >> 4);
83 if (det->channel_level > 280) {
84 /* There is adequate energy in the channel.
85 Is it mostly at 2100Hz? */
86 if (det->notch_level*6 < det->channel_level) {
87 /* The notch says yes, so we have the tone. */
88 if (!det->tone_present) {
89 /* Do we get a kick every 450+-25ms? */
90 if (det->tone_cycle_duration >= 425*8
91 && det->tone_cycle_duration <= 475*8) {
92 det->good_cycles++;
93 if (det->good_cycles > 2)
94 det->hit = TRUE;
95 }
96 det->tone_cycle_duration = 0;
97 }
98 det->tone_present = TRUE;
99 } else
100 det->tone_present = FALSE;
101 det->tone_cycle_duration++;
102 } else {
103 det->tone_present = FALSE;
104 det->tone_cycle_duration = 0;
105 det->good_cycles = 0;
106 }
107 return det->hit;
108}
109/*- End of function --------------------------------------------------------*/
110/*- End of file ------------------------------------------------------------*/
diff --git a/drivers/isdn/mISDN/dsp_hwec.c b/drivers/isdn/mISDN/dsp_hwec.c
new file mode 100644
index 000000000000..eb892d9dd5c6
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_hwec.c
@@ -0,0 +1,138 @@
1/*
2 * dsp_hwec.c:
3 * builtin mISDN dsp pipeline element for enabling the hw echocanceller
4 *
5 * Copyright (C) 2007, Nadi Sarrar
6 *
7 * Nadi Sarrar <nadi@beronet.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the Free
11 * Software Foundation; either version 2 of the License, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * more details.
18 *
19 * You should have received a copy of the GNU General Public License along with
20 * this program; if not, write to the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 *
23 * The full GNU General Public License is included in this distribution in the
24 * file called LICENSE.
25 *
26 */
27
28#include <linux/kernel.h>
29#include <linux/string.h>
30#include <linux/mISDNdsp.h>
31#include <linux/mISDNif.h>
32#include "core.h"
33#include "dsp.h"
34#include "dsp_hwec.h"
35
36static struct mISDN_dsp_element_arg args[] = {
37 { "deftaps", "128", "Set the number of taps of cancellation." },
38};
39
40static struct mISDN_dsp_element dsp_hwec_p = {
41 .name = "hwec",
42 .new = NULL,
43 .free = NULL,
44 .process_tx = NULL,
45 .process_rx = NULL,
46 .num_args = sizeof(args) / sizeof(struct mISDN_dsp_element_arg),
47 .args = args,
48};
49struct mISDN_dsp_element *dsp_hwec = &dsp_hwec_p;
50
51void dsp_hwec_enable(struct dsp *dsp, const char *arg)
52{
53 int deftaps = 128,
54 len;
55 struct mISDN_ctrl_req cq;
56
57 if (!dsp) {
58 printk(KERN_ERR "%s: failed to enable hwec: dsp is NULL\n",
59 __func__);
60 return;
61 }
62
63 if (!arg)
64 goto _do;
65
66 len = strlen(arg);
67 if (!len)
68 goto _do;
69
70 {
71 char _dup[len + 1];
72 char *dup, *tok, *name, *val;
73 int tmp;
74
75 strcpy(_dup, arg);
76 dup = _dup;
77
78 while ((tok = strsep(&dup, ","))) {
79 if (!strlen(tok))
80 continue;
81 name = strsep(&tok, "=");
82 val = tok;
83
84 if (!val)
85 continue;
86
87 if (!strcmp(name, "deftaps")) {
88 if (sscanf(val, "%d", &tmp) == 1)
89 deftaps = tmp;
90 }
91 }
92 }
93
94_do:
95 printk(KERN_DEBUG "%s: enabling hwec with deftaps=%d\n",
96 __func__, deftaps);
97 memset(&cq, 0, sizeof(cq));
98 cq.op = MISDN_CTRL_HFC_ECHOCAN_ON;
99 cq.p1 = deftaps;
100 if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
101 printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
102 __func__);
103 return;
104 }
105}
106
107void dsp_hwec_disable(struct dsp *dsp)
108{
109 struct mISDN_ctrl_req cq;
110
111 if (!dsp) {
112 printk(KERN_ERR "%s: failed to disable hwec: dsp is NULL\n",
113 __func__);
114 return;
115 }
116
117 printk(KERN_DEBUG "%s: disabling hwec\n", __func__);
118 memset(&cq, 0, sizeof(cq));
119 cq.op = MISDN_CTRL_HFC_ECHOCAN_OFF;
120 if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
121 printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
122 __func__);
123 return;
124 }
125}
126
127int dsp_hwec_init(void)
128{
129 mISDN_dsp_element_register(dsp_hwec);
130
131 return 0;
132}
133
134void dsp_hwec_exit(void)
135{
136 mISDN_dsp_element_unregister(dsp_hwec);
137}
138
diff --git a/drivers/isdn/mISDN/dsp_hwec.h b/drivers/isdn/mISDN/dsp_hwec.h
new file mode 100644
index 000000000000..eebe80c3f713
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_hwec.h
@@ -0,0 +1,10 @@
1/*
2 * dsp_hwec.h
3 */
4
5extern struct mISDN_dsp_element *dsp_hwec;
6extern void dsp_hwec_enable(struct dsp *dsp, const char *arg);
7extern void dsp_hwec_disable(struct dsp *dsp);
8extern int dsp_hwec_init(void);
9extern void dsp_hwec_exit(void);
10
diff --git a/drivers/isdn/mISDN/dsp_pipeline.c b/drivers/isdn/mISDN/dsp_pipeline.c
new file mode 100644
index 000000000000..850260ab57d0
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_pipeline.c
@@ -0,0 +1,348 @@
1/*
2 * dsp_pipeline.c: pipelined audio processing
3 *
4 * Copyright (C) 2007, Nadi Sarrar
5 *
6 * Nadi Sarrar <nadi@beronet.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 *
18 * You should have received a copy of the GNU General Public License along with
19 * this program; if not, write to the Free Software Foundation, Inc., 59
20 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 * The full GNU General Public License is included in this distribution in the
23 * file called LICENSE.
24 *
25 */
26
27#include <linux/kernel.h>
28#include <linux/list.h>
29#include <linux/string.h>
30#include <linux/mISDNif.h>
31#include <linux/mISDNdsp.h>
32#include "dsp.h"
33#include "dsp_hwec.h"
34
35/* uncomment for debugging */
36/*#define PIPELINE_DEBUG*/
37
38struct dsp_pipeline_entry {
39 struct mISDN_dsp_element *elem;
40 void *p;
41 struct list_head list;
42};
43struct dsp_element_entry {
44 struct mISDN_dsp_element *elem;
45 struct device dev;
46 struct list_head list;
47};
48
49static LIST_HEAD(dsp_elements);
50
51/* sysfs */
52static struct class *elements_class;
53
54static ssize_t
55attr_show_args(struct device *dev, struct device_attribute *attr, char *buf)
56{
57 struct mISDN_dsp_element *elem = dev_get_drvdata(dev);
58 ssize_t len = 0;
59 int i = 0;
60
61 *buf = 0;
62 for (; i < elem->num_args; ++i)
63 len = sprintf(buf, "%sName: %s\n%s%s%sDescription: %s\n"
64 "\n", buf,
65 elem->args[i].name,
66 elem->args[i].def ? "Default: " : "",
67 elem->args[i].def ? elem->args[i].def : "",
68 elem->args[i].def ? "\n" : "",
69 elem->args[i].desc);
70
71 return len;
72}
73
74static struct device_attribute element_attributes[] = {
75 __ATTR(args, 0444, attr_show_args, NULL),
76};
77
78int mISDN_dsp_element_register(struct mISDN_dsp_element *elem)
79{
80 struct dsp_element_entry *entry;
81 int ret, i;
82
83 if (!elem)
84 return -EINVAL;
85
86 entry = kzalloc(sizeof(struct dsp_element_entry), GFP_KERNEL);
87 if (!entry)
88 return -ENOMEM;
89
90 entry->elem = elem;
91
92 entry->dev.class = elements_class;
93 dev_set_drvdata(&entry->dev, elem);
94 snprintf(entry->dev.bus_id, BUS_ID_SIZE, elem->name);
95 ret = device_register(&entry->dev);
96 if (ret) {
97 printk(KERN_ERR "%s: failed to register %s\n",
98 __func__, elem->name);
99 goto err1;
100 }
101
102 for (i = 0; i < (sizeof(element_attributes)
103 / sizeof(struct device_attribute)); ++i)
104 ret = device_create_file(&entry->dev,
105 &element_attributes[i]);
106 if (ret) {
107 printk(KERN_ERR "%s: failed to create device file\n",
108 __func__);
109 goto err2;
110 }
111
112 list_add_tail(&entry->list, &dsp_elements);
113
114 printk(KERN_DEBUG "%s: %s registered\n", __func__, elem->name);
115
116 return 0;
117
118err2:
119 device_unregister(&entry->dev);
120err1:
121 kfree(entry);
122 return ret;
123}
124EXPORT_SYMBOL(mISDN_dsp_element_register);
125
126void mISDN_dsp_element_unregister(struct mISDN_dsp_element *elem)
127{
128 struct dsp_element_entry *entry, *n;
129
130 if (!elem)
131 return;
132
133 list_for_each_entry_safe(entry, n, &dsp_elements, list)
134 if (entry->elem == elem) {
135 list_del(&entry->list);
136 device_unregister(&entry->dev);
137 kfree(entry);
138 printk(KERN_DEBUG "%s: %s unregistered\n",
139 __func__, elem->name);
140 return;
141 }
142 printk(KERN_ERR "%s: element %s not in list.\n", __func__, elem->name);
143}
144EXPORT_SYMBOL(mISDN_dsp_element_unregister);
145
146int dsp_pipeline_module_init(void)
147{
148 elements_class = class_create(THIS_MODULE, "dsp_pipeline");
149 if (IS_ERR(elements_class))
150 return PTR_ERR(elements_class);
151
152#ifdef PIPELINE_DEBUG
153 printk(KERN_DEBUG "%s: dsp pipeline module initialized\n", __func__);
154#endif
155
156 dsp_hwec_init();
157
158 return 0;
159}
160
161void dsp_pipeline_module_exit(void)
162{
163 struct dsp_element_entry *entry, *n;
164
165 dsp_hwec_exit();
166
167 class_destroy(elements_class);
168
169 list_for_each_entry_safe(entry, n, &dsp_elements, list) {
170 list_del(&entry->list);
171 printk(KERN_WARNING "%s: element was still registered: %s\n",
172 __func__, entry->elem->name);
173 kfree(entry);
174 }
175
176 printk(KERN_DEBUG "%s: dsp pipeline module exited\n", __func__);
177}
178
179int dsp_pipeline_init(struct dsp_pipeline *pipeline)
180{
181 if (!pipeline)
182 return -EINVAL;
183
184 INIT_LIST_HEAD(&pipeline->list);
185
186#ifdef PIPELINE_DEBUG
187 printk(KERN_DEBUG "%s: dsp pipeline ready\n", __func__);
188#endif
189
190 return 0;
191}
192
193static inline void _dsp_pipeline_destroy(struct dsp_pipeline *pipeline)
194{
195 struct dsp_pipeline_entry *entry, *n;
196
197 list_for_each_entry_safe(entry, n, &pipeline->list, list) {
198 list_del(&entry->list);
199 if (entry->elem == dsp_hwec)
200 dsp_hwec_disable(container_of(pipeline, struct dsp,
201 pipeline));
202 else
203 entry->elem->free(entry->p);
204 kfree(entry);
205 }
206}
207
208void dsp_pipeline_destroy(struct dsp_pipeline *pipeline)
209{
210
211 if (!pipeline)
212 return;
213
214 _dsp_pipeline_destroy(pipeline);
215
216#ifdef PIPELINE_DEBUG
217 printk(KERN_DEBUG "%s: dsp pipeline destroyed\n", __func__);
218#endif
219}
220
221int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg)
222{
223 int len, incomplete = 0, found = 0;
224 char *dup, *tok, *name, *args;
225 struct dsp_element_entry *entry, *n;
226 struct dsp_pipeline_entry *pipeline_entry;
227 struct mISDN_dsp_element *elem;
228
229 if (!pipeline)
230 return -EINVAL;
231
232 if (!list_empty(&pipeline->list))
233 _dsp_pipeline_destroy(pipeline);
234
235 if (!cfg)
236 return 0;
237
238 len = strlen(cfg);
239 if (!len)
240 return 0;
241
242 dup = kmalloc(len + 1, GFP_KERNEL);
243 if (!dup)
244 return 0;
245 strcpy(dup, cfg);
246 while ((tok = strsep(&dup, "|"))) {
247 if (!strlen(tok))
248 continue;
249 name = strsep(&tok, "(");
250 args = strsep(&tok, ")");
251 if (args && !*args)
252 args = 0;
253
254 list_for_each_entry_safe(entry, n, &dsp_elements, list)
255 if (!strcmp(entry->elem->name, name)) {
256 elem = entry->elem;
257
258 pipeline_entry = kmalloc(sizeof(struct
259 dsp_pipeline_entry), GFP_KERNEL);
260 if (!pipeline_entry) {
261 printk(KERN_DEBUG "%s: failed to add "
262 "entry to pipeline: %s (out of "
263 "memory)\n", __func__, elem->name);
264 incomplete = 1;
265 goto _out;
266 }
267 pipeline_entry->elem = elem;
268
269 if (elem == dsp_hwec) {
270 /* This is a hack to make the hwec
271 available as a pipeline module */
272 dsp_hwec_enable(container_of(pipeline,
273 struct dsp, pipeline), args);
274 list_add_tail(&pipeline_entry->list,
275 &pipeline->list);
276 } else {
277 pipeline_entry->p = elem->new(args);
278 if (pipeline_entry->p) {
279 list_add_tail(&pipeline_entry->
280 list, &pipeline->list);
281#ifdef PIPELINE_DEBUG
282 printk(KERN_DEBUG "%s: created "
283 "instance of %s%s%s\n",
284 __func__, name, args ?
285 " with args " : "", args ?
286 args : "");
287#endif
288 } else {
289 printk(KERN_DEBUG "%s: failed "
290 "to add entry to pipeline: "
291 "%s (new() returned NULL)\n",
292 __func__, elem->name);
293 kfree(pipeline_entry);
294 incomplete = 1;
295 }
296 }
297 found = 1;
298 break;
299 }
300
301 if (found)
302 found = 0;
303 else {
304 printk(KERN_DEBUG "%s: element not found, skipping: "
305 "%s\n", __func__, name);
306 incomplete = 1;
307 }
308 }
309
310_out:
311 if (!list_empty(&pipeline->list))
312 pipeline->inuse = 1;
313 else
314 pipeline->inuse = 0;
315
316#ifdef PIPELINE_DEBUG
317 printk(KERN_DEBUG "%s: dsp pipeline built%s: %s\n",
318 __func__, incomplete ? " incomplete" : "", cfg);
319#endif
320 kfree(dup);
321 return 0;
322}
323
324void dsp_pipeline_process_tx(struct dsp_pipeline *pipeline, u8 *data, int len)
325{
326 struct dsp_pipeline_entry *entry;
327
328 if (!pipeline)
329 return;
330
331 list_for_each_entry(entry, &pipeline->list, list)
332 if (entry->elem->process_tx)
333 entry->elem->process_tx(entry->p, data, len);
334}
335
336void dsp_pipeline_process_rx(struct dsp_pipeline *pipeline, u8 *data, int len)
337{
338 struct dsp_pipeline_entry *entry;
339
340 if (!pipeline)
341 return;
342
343 list_for_each_entry_reverse(entry, &pipeline->list, list)
344 if (entry->elem->process_rx)
345 entry->elem->process_rx(entry->p, data, len);
346}
347
348
diff --git a/drivers/isdn/mISDN/dsp_tones.c b/drivers/isdn/mISDN/dsp_tones.c
new file mode 100644
index 000000000000..23dd0dd21524
--- /dev/null
+++ b/drivers/isdn/mISDN/dsp_tones.c
@@ -0,0 +1,551 @@
1/*
2 * Audio support data for ISDN4Linux.
3 *
4 * Copyright Andreas Eversberg (jolly@eversberg.eu)
5 *
6 * This software may be used and distributed according to the terms
7 * of the GNU General Public License, incorporated herein by reference.
8 *
9 */
10
11#include <linux/mISDNif.h>
12#include <linux/mISDNdsp.h>
13#include "core.h"
14#include "dsp.h"
15
16
17#define DATA_S sample_silence
18#define SIZE_S (&sizeof_silence)
19#define DATA_GA sample_german_all
20#define SIZE_GA (&sizeof_german_all)
21#define DATA_GO sample_german_old
22#define SIZE_GO (&sizeof_german_old)
23#define DATA_DT sample_american_dialtone
24#define SIZE_DT (&sizeof_american_dialtone)
25#define DATA_RI sample_american_ringing
26#define SIZE_RI (&sizeof_american_ringing)
27#define DATA_BU sample_american_busy
28#define SIZE_BU (&sizeof_american_busy)
29#define DATA_S1 sample_special1
30#define SIZE_S1 (&sizeof_special1)
31#define DATA_S2 sample_special2
32#define SIZE_S2 (&sizeof_special2)
33#define DATA_S3 sample_special3
34#define SIZE_S3 (&sizeof_special3)
35
36/***************/
37/* tones loops */
38/***************/
39
40/* all tones are alaw encoded */
41/* the last sample+1 is in phase with the first sample. the error is low */
42
43static u8 sample_german_all[] = {
44 0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
45 0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
46 0xdc, 0xfc, 0x6c,
47 0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
48 0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
49 0xdc, 0xfc, 0x6c,
50 0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
51 0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
52 0xdc, 0xfc, 0x6c,
53 0x80, 0xab, 0x81, 0x6d, 0xfd, 0xdd, 0x5d, 0x9d,
54 0x4d, 0xd1, 0x89, 0x88, 0xd0, 0x4c, 0x9c, 0x5c,
55 0xdc, 0xfc, 0x6c,
56};
57static u32 sizeof_german_all = sizeof(sample_german_all);
58
59static u8 sample_german_old[] = {
60 0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
61 0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
62 0x8c,
63 0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
64 0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
65 0x8c,
66 0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
67 0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
68 0x8c,
69 0xec, 0x68, 0xe1, 0x6d, 0x6d, 0x91, 0x51, 0xed,
70 0x6d, 0x01, 0x1e, 0x10, 0x0c, 0x90, 0x60, 0x70,
71 0x8c,
72};
73static u32 sizeof_german_old = sizeof(sample_german_old);
74
75static u8 sample_american_dialtone[] = {
76 0x2a, 0x18, 0x90, 0x6c, 0x4c, 0xbc, 0x4c, 0x6c,
77 0x10, 0x58, 0x32, 0xb9, 0x31, 0x2d, 0x8d, 0x0d,
78 0x8d, 0x2d, 0x31, 0x99, 0x0f, 0x28, 0x60, 0xf0,
79 0xd0, 0x50, 0xd0, 0x30, 0x60, 0x08, 0x8e, 0x67,
80 0x09, 0x19, 0x21, 0xe1, 0xd9, 0xb9, 0x29, 0x67,
81 0x83, 0x02, 0xce, 0xbe, 0xee, 0x1a, 0x1b, 0xef,
82 0xbf, 0xcf, 0x03, 0x82, 0x66, 0x28, 0xb8, 0xd8,
83 0xe0, 0x20, 0x18, 0x08, 0x66, 0x8f, 0x09, 0x61,
84 0x31, 0xd1, 0x51, 0xd1, 0xf1, 0x61, 0x29, 0x0e,
85 0x98, 0x30, 0x2c, 0x8c, 0x0c, 0x8c, 0x2c, 0x30,
86 0xb8, 0x33, 0x59, 0x11, 0x6d, 0x4d, 0xbd, 0x4d,
87 0x6d, 0x91, 0x19,
88};
89static u32 sizeof_american_dialtone = sizeof(sample_american_dialtone);
90
91static u8 sample_american_ringing[] = {
92 0x2a, 0xe0, 0xac, 0x0c, 0xbc, 0x4c, 0x8c, 0x90,
93 0x48, 0xc7, 0xc1, 0xed, 0xcd, 0x4d, 0xcd, 0xed,
94 0xc1, 0xb7, 0x08, 0x30, 0xec, 0xcc, 0xcc, 0x8c,
95 0x10, 0x58, 0x1a, 0x99, 0x71, 0xed, 0x8d, 0x8d,
96 0x2d, 0x41, 0x89, 0x9e, 0x20, 0x70, 0x2c, 0xec,
97 0x2c, 0x70, 0x20, 0x86, 0x77, 0xe1, 0x31, 0x11,
98 0xd1, 0xf1, 0x81, 0x09, 0xa3, 0x56, 0x58, 0x00,
99 0x40, 0xc0, 0x60, 0x38, 0x46, 0x43, 0x57, 0x39,
100 0xd9, 0x59, 0x99, 0xc9, 0x77, 0x2f, 0x2e, 0xc6,
101 0xd6, 0x28, 0xd6, 0x36, 0x26, 0x2e, 0x8a, 0xa3,
102 0x43, 0x63, 0x4b, 0x4a, 0x62, 0x42, 0xa2, 0x8b,
103 0x2f, 0x27, 0x37, 0xd7, 0x29, 0xd7, 0xc7, 0x2f,
104 0x2e, 0x76, 0xc8, 0x98, 0x58, 0xd8, 0x38, 0x56,
105 0x42, 0x47, 0x39, 0x61, 0xc1, 0x41, 0x01, 0x59,
106 0x57, 0xa2, 0x08, 0x80, 0xf0, 0xd0, 0x10, 0x30,
107 0xe0, 0x76, 0x87, 0x21, 0x71, 0x2d, 0xed, 0x2d,
108 0x71, 0x21, 0x9f, 0x88, 0x40, 0x2c, 0x8c, 0x8c,
109 0xec, 0x70, 0x98, 0x1b, 0x59, 0x11, 0x8d, 0xcd,
110 0xcd, 0xed, 0x31, 0x09, 0xb6, 0xc0, 0xec, 0xcc,
111 0x4c, 0xcc, 0xec, 0xc0, 0xc6, 0x49, 0x91, 0x8d,
112 0x4d, 0xbd, 0x0d, 0xad, 0xe1,
113};
114static u32 sizeof_american_ringing = sizeof(sample_american_ringing);
115
116static u8 sample_american_busy[] = {
117 0x2a, 0x00, 0x6c, 0x4c, 0x4c, 0x6c, 0xb0, 0x66,
118 0x99, 0x11, 0x6d, 0x8d, 0x2d, 0x41, 0xd7, 0x96,
119 0x60, 0xf0, 0x70, 0x40, 0x58, 0xf6, 0x53, 0x57,
120 0x09, 0x89, 0xd7, 0x5f, 0xe3, 0x2a, 0xe3, 0x5f,
121 0xd7, 0x89, 0x09, 0x57, 0x53, 0xf6, 0x58, 0x40,
122 0x70, 0xf0, 0x60, 0x96, 0xd7, 0x41, 0x2d, 0x8d,
123 0x6d, 0x11, 0x99, 0x66, 0xb0, 0x6c, 0x4c, 0x4c,
124 0x6c, 0x00, 0x2a, 0x01, 0x6d, 0x4d, 0x4d, 0x6d,
125 0xb1, 0x67, 0x98, 0x10, 0x6c, 0x8c, 0x2c, 0x40,
126 0xd6, 0x97, 0x61, 0xf1, 0x71, 0x41, 0x59, 0xf7,
127 0x52, 0x56, 0x08, 0x88, 0xd6, 0x5e, 0xe2, 0x2a,
128 0xe2, 0x5e, 0xd6, 0x88, 0x08, 0x56, 0x52, 0xf7,
129 0x59, 0x41, 0x71, 0xf1, 0x61, 0x97, 0xd6, 0x40,
130 0x2c, 0x8c, 0x6c, 0x10, 0x98, 0x67, 0xb1, 0x6d,
131 0x4d, 0x4d, 0x6d, 0x01,
132};
133static u32 sizeof_american_busy = sizeof(sample_american_busy);
134
135static u8 sample_special1[] = {
136 0x2a, 0x2c, 0xbc, 0x6c, 0xd6, 0x71, 0xbd, 0x0d,
137 0xd9, 0x80, 0xcc, 0x4c, 0x40, 0x39, 0x0d, 0xbd,
138 0x11, 0x86, 0xec, 0xbc, 0xec, 0x0e, 0x51, 0xbd,
139 0x8d, 0x89, 0x30, 0x4c, 0xcc, 0xe0, 0xe1, 0xcd,
140 0x4d, 0x31, 0x88, 0x8c, 0xbc, 0x50, 0x0f, 0xed,
141 0xbd, 0xed, 0x87, 0x10, 0xbc, 0x0c, 0x38, 0x41,
142 0x4d, 0xcd, 0x81, 0xd8, 0x0c, 0xbc, 0x70, 0xd7,
143 0x6d, 0xbd, 0x2d,
144};
145static u32 sizeof_special1 = sizeof(sample_special1);
146
147static u8 sample_special2[] = {
148 0x2a, 0xcc, 0x8c, 0xd7, 0x4d, 0x2d, 0x18, 0xbc,
149 0x10, 0xc1, 0xbd, 0xc1, 0x10, 0xbc, 0x18, 0x2d,
150 0x4d, 0xd7, 0x8c, 0xcc, 0x2a, 0xcd, 0x8d, 0xd6,
151 0x4c, 0x2c, 0x19, 0xbd, 0x11, 0xc0, 0xbc, 0xc0,
152 0x11, 0xbd, 0x19, 0x2c, 0x4c, 0xd6, 0x8d, 0xcd,
153 0x2a, 0xcc, 0x8c, 0xd7, 0x4d, 0x2d, 0x18, 0xbc,
154 0x10, 0xc1, 0xbd, 0xc1, 0x10, 0xbc, 0x18, 0x2d,
155 0x4d, 0xd7, 0x8c, 0xcc, 0x2a, 0xcd, 0x8d, 0xd6,
156 0x4c, 0x2c, 0x19, 0xbd, 0x11, 0xc0, 0xbc, 0xc0,
157 0x11, 0xbd, 0x19, 0x2c, 0x4c, 0xd6, 0x8d, 0xcd,
158};
159static u32 sizeof_special2 = sizeof(sample_special2);
160
161static u8 sample_special3[] = {
162 0x2a, 0xbc, 0x18, 0xcd, 0x11, 0x2c, 0x8c, 0xc1,
163 0x4d, 0xd6, 0xbc, 0xd6, 0x4d, 0xc1, 0x8c, 0x2c,
164 0x11, 0xcd, 0x18, 0xbc, 0x2a, 0xbd, 0x19, 0xcc,
165 0x10, 0x2d, 0x8d, 0xc0, 0x4c, 0xd7, 0xbd, 0xd7,
166 0x4c, 0xc0, 0x8d, 0x2d, 0x10, 0xcc, 0x19, 0xbd,
167 0x2a, 0xbc, 0x18, 0xcd, 0x11, 0x2c, 0x8c, 0xc1,
168 0x4d, 0xd6, 0xbc, 0xd6, 0x4d, 0xc1, 0x8c, 0x2c,
169 0x11, 0xcd, 0x18, 0xbc, 0x2a, 0xbd, 0x19, 0xcc,
170 0x10, 0x2d, 0x8d, 0xc0, 0x4c, 0xd7, 0xbd, 0xd7,
171 0x4c, 0xc0, 0x8d, 0x2d, 0x10, 0xcc, 0x19, 0xbd,
172};
173static u32 sizeof_special3 = sizeof(sample_special3);
174
175static u8 sample_silence[] = {
176 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
177 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
178 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
179 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
180 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
181 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
182 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
183 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
184 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
185 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
186 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
187 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a, 0x2a,
188};
189static u32 sizeof_silence = sizeof(sample_silence);
190
191struct tones_samples {
192 u32 *len;
193 u8 *data;
194};
195static struct
196tones_samples samples[] = {
197 {&sizeof_german_all, sample_german_all},
198 {&sizeof_german_old, sample_german_old},
199 {&sizeof_american_dialtone, sample_american_dialtone},
200 {&sizeof_american_ringing, sample_american_ringing},
201 {&sizeof_american_busy, sample_american_busy},
202 {&sizeof_special1, sample_special1},
203 {&sizeof_special2, sample_special2},
204 {&sizeof_special3, sample_special3},
205 {NULL, NULL},
206};
207
208/***********************************
209 * generate ulaw from alaw samples *
210 ***********************************/
211
212void
213dsp_audio_generate_ulaw_samples(void)
214{
215 int i, j;
216
217 i = 0;
218 while (samples[i].len) {
219 j = 0;
220 while (j < (*samples[i].len)) {
221 samples[i].data[j] =
222 dsp_audio_alaw_to_ulaw[samples[i].data[j]];
223 j++;
224 }
225 i++;
226 }
227}
228
229
230/****************************
231 * tone sequence definition *
232 ****************************/
233
234struct pattern {
235 int tone;
236 u8 *data[10];
237 u32 *siz[10];
238 u32 seq[10];
239} pattern[] = {
240 {TONE_GERMAN_DIALTONE,
241 {DATA_GA, 0, 0, 0, 0, 0, 0, 0, 0, 0},
242 {SIZE_GA, 0, 0, 0, 0, 0, 0, 0, 0, 0},
243 {1900, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
244
245 {TONE_GERMAN_OLDDIALTONE,
246 {DATA_GO, 0, 0, 0, 0, 0, 0, 0, 0, 0},
247 {SIZE_GO, 0, 0, 0, 0, 0, 0, 0, 0, 0},
248 {1998, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
249
250 {TONE_AMERICAN_DIALTONE,
251 {DATA_DT, 0, 0, 0, 0, 0, 0, 0, 0, 0},
252 {SIZE_DT, 0, 0, 0, 0, 0, 0, 0, 0, 0},
253 {8000, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
254
255 {TONE_GERMAN_DIALPBX,
256 {DATA_GA, DATA_S, DATA_GA, DATA_S, DATA_GA, DATA_S, 0, 0, 0, 0},
257 {SIZE_GA, SIZE_S, SIZE_GA, SIZE_S, SIZE_GA, SIZE_S, 0, 0, 0, 0},
258 {2000, 2000, 2000, 2000, 2000, 12000, 0, 0, 0, 0} },
259
260 {TONE_GERMAN_OLDDIALPBX,
261 {DATA_GO, DATA_S, DATA_GO, DATA_S, DATA_GO, DATA_S, 0, 0, 0, 0},
262 {SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, 0, 0, 0, 0},
263 {2000, 2000, 2000, 2000, 2000, 12000, 0, 0, 0, 0} },
264
265 {TONE_AMERICAN_DIALPBX,
266 {DATA_DT, DATA_S, DATA_DT, DATA_S, DATA_DT, DATA_S, 0, 0, 0, 0},
267 {SIZE_DT, SIZE_S, SIZE_DT, SIZE_S, SIZE_DT, SIZE_S, 0, 0, 0, 0},
268 {2000, 2000, 2000, 2000, 2000, 12000, 0, 0, 0, 0} },
269
270 {TONE_GERMAN_RINGING,
271 {DATA_GA, DATA_S, 0, 0, 0, 0, 0, 0, 0, 0},
272 {SIZE_GA, SIZE_S, 0, 0, 0, 0, 0, 0, 0, 0},
273 {8000, 32000, 0, 0, 0, 0, 0, 0, 0, 0} },
274
275 {TONE_GERMAN_OLDRINGING,
276 {DATA_GO, DATA_S, 0, 0, 0, 0, 0, 0, 0, 0},
277 {SIZE_GO, SIZE_S, 0, 0, 0, 0, 0, 0, 0, 0},
278 {8000, 40000, 0, 0, 0, 0, 0, 0, 0, 0} },
279
280 {TONE_AMERICAN_RINGING,
281 {DATA_RI, DATA_S, 0, 0, 0, 0, 0, 0, 0, 0},
282 {SIZE_RI, SIZE_S, 0, 0, 0, 0, 0, 0, 0, 0},
283 {8000, 32000, 0, 0, 0, 0, 0, 0, 0, 0} },
284
285 {TONE_GERMAN_RINGPBX,
286 {DATA_GA, DATA_S, DATA_GA, DATA_S, 0, 0, 0, 0, 0, 0},
287 {SIZE_GA, SIZE_S, SIZE_GA, SIZE_S, 0, 0, 0, 0, 0, 0},
288 {4000, 4000, 4000, 28000, 0, 0, 0, 0, 0, 0} },
289
290 {TONE_GERMAN_OLDRINGPBX,
291 {DATA_GO, DATA_S, DATA_GO, DATA_S, 0, 0, 0, 0, 0, 0},
292 {SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, 0, 0, 0, 0, 0, 0},
293 {4000, 4000, 4000, 28000, 0, 0, 0, 0, 0, 0} },
294
295 {TONE_AMERICAN_RINGPBX,
296 {DATA_RI, DATA_S, DATA_RI, DATA_S, 0, 0, 0, 0, 0, 0},
297 {SIZE_RI, SIZE_S, SIZE_RI, SIZE_S, 0, 0, 0, 0, 0, 0},
298 {4000, 4000, 4000, 28000, 0, 0, 0, 0, 0, 0} },
299
300 {TONE_GERMAN_BUSY,
301 {DATA_GA, DATA_S, 0, 0, 0, 0, 0, 0, 0, 0},
302 {SIZE_GA, SIZE_S, 0, 0, 0, 0, 0, 0, 0, 0},
303 {4000, 4000, 0, 0, 0, 0, 0, 0, 0, 0} },
304
305 {TONE_GERMAN_OLDBUSY,
306 {DATA_GO, DATA_S, 0, 0, 0, 0, 0, 0, 0, 0},
307 {SIZE_GO, SIZE_S, 0, 0, 0, 0, 0, 0, 0, 0},
308 {1000, 5000, 0, 0, 0, 0, 0, 0, 0, 0} },
309
310 {TONE_AMERICAN_BUSY,
311 {DATA_BU, DATA_S, 0, 0, 0, 0, 0, 0, 0, 0},
312 {SIZE_BU, SIZE_S, 0, 0, 0, 0, 0, 0, 0, 0},
313 {4000, 4000, 0, 0, 0, 0, 0, 0, 0, 0} },
314
315 {TONE_GERMAN_HANGUP,
316 {DATA_GA, DATA_S, 0, 0, 0, 0, 0, 0, 0, 0},
317 {SIZE_GA, SIZE_S, 0, 0, 0, 0, 0, 0, 0, 0},
318 {4000, 4000, 0, 0, 0, 0, 0, 0, 0, 0} },
319
320 {TONE_GERMAN_OLDHANGUP,
321 {DATA_GO, DATA_S, 0, 0, 0, 0, 0, 0, 0, 0},
322 {SIZE_GO, SIZE_S, 0, 0, 0, 0, 0, 0, 0, 0},
323 {1000, 5000, 0, 0, 0, 0, 0, 0, 0, 0} },
324
325 {TONE_AMERICAN_HANGUP,
326 {DATA_DT, 0, 0, 0, 0, 0, 0, 0, 0, 0},
327 {SIZE_DT, 0, 0, 0, 0, 0, 0, 0, 0, 0},
328 {8000, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
329
330 {TONE_SPECIAL_INFO,
331 {DATA_S1, DATA_S2, DATA_S3, DATA_S, 0, 0, 0, 0, 0, 0},
332 {SIZE_S1, SIZE_S2, SIZE_S3, SIZE_S, 0, 0, 0, 0, 0, 0},
333 {2666, 2666, 2666, 8002, 0, 0, 0, 0, 0, 0} },
334
335 {TONE_GERMAN_GASSENBESETZT,
336 {DATA_GA, DATA_S, 0, 0, 0, 0, 0, 0, 0, 0},
337 {SIZE_GA, SIZE_S, 0, 0, 0, 0, 0, 0, 0, 0},
338 {2000, 2000, 0, 0, 0, 0, 0, 0, 0, 0} },
339
340 {TONE_GERMAN_AUFSCHALTTON,
341 {DATA_GO, DATA_S, DATA_GO, DATA_S, 0, 0, 0, 0, 0, 0},
342 {SIZE_GO, SIZE_S, SIZE_GO, SIZE_S, 0, 0, 0, 0, 0, 0},
343 {1000, 5000, 1000, 17000, 0, 0, 0, 0, 0, 0} },
344
345 {0,
346 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
347 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
348 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
349};
350
351/******************
352 * copy tone data *
353 ******************/
354
355/* an sk_buff is generated from the number of samples needed.
356 * the count will be changed and may begin from 0 each pattern period.
357 * the clue is to precalculate the pointers and legths to use only one
358 * memcpy per function call, or two memcpy if the tone sequence changes.
359 *
360 * pattern - the type of the pattern
361 * count - the sample from the beginning of the pattern (phase)
362 * len - the number of bytes
363 *
364 * return - the sk_buff with the sample
365 *
366 * if tones has finished (e.g. knocking tone), dsp->tones is turned off
367 */
368void dsp_tone_copy(struct dsp *dsp, u8 *data, int len)
369{
370 int index, count, start, num;
371 struct pattern *pat;
372 struct dsp_tone *tone = &dsp->tone;
373
374 /* if we have no tone, we copy silence */
375 if (!tone->tone) {
376 memset(data, dsp_silence, len);
377 return;
378 }
379
380 /* process pattern */
381 pat = (struct pattern *)tone->pattern;
382 /* points to the current pattern */
383 index = tone->index; /* gives current sequence index */
384 count = tone->count; /* gives current sample */
385
386 /* copy sample */
387 while (len) {
388 /* find sample to start with */
389 while (42) {
390 /* warp arround */
391 if (!pat->seq[index]) {
392 count = 0;
393 index = 0;
394 }
395 /* check if we are currently playing this tone */
396 if (count < pat->seq[index])
397 break;
398 if (dsp_debug & DEBUG_DSP_TONE)
399 printk(KERN_DEBUG "%s: reaching next sequence "
400 "(index=%d)\n", __func__, index);
401 count -= pat->seq[index];
402 index++;
403 }
404 /* calculate start and number of samples */
405 start = count % (*(pat->siz[index]));
406 num = len;
407 if (num+count > pat->seq[index])
408 num = pat->seq[index] - count;
409 if (num+start > (*(pat->siz[index])))
410 num = (*(pat->siz[index])) - start;
411 /* copy memory */
412 memcpy(data, pat->data[index]+start, num);
413 /* reduce length */
414 data += num;
415 count += num;
416 len -= num;
417 }
418 tone->index = index;
419 tone->count = count;
420
421 /* return sk_buff */
422 return;
423}
424
425
426/*******************************
427 * send HW message to hfc card *
428 *******************************/
429
430static void
431dsp_tone_hw_message(struct dsp *dsp, u8 *sample, int len)
432{
433 struct sk_buff *nskb;
434
435 /* unlocking is not required, because we don't expect a response */
436 nskb = _alloc_mISDN_skb(PH_CONTROL_REQ,
437 (len)?HFC_SPL_LOOP_ON:HFC_SPL_LOOP_OFF, len, sample,
438 GFP_ATOMIC);
439 if (nskb) {
440 if (dsp->ch.peer) {
441 if (dsp->ch.recv(dsp->ch.peer, nskb))
442 dev_kfree_skb(nskb);
443 } else
444 dev_kfree_skb(nskb);
445 }
446}
447
448
449/*****************
450 * timer expires *
451 *****************/
452void
453dsp_tone_timeout(void *arg)
454{
455 struct dsp *dsp = arg;
456 struct dsp_tone *tone = &dsp->tone;
457 struct pattern *pat = (struct pattern *)tone->pattern;
458 int index = tone->index;
459
460 if (!tone->tone)
461 return;
462
463 index++;
464 if (!pat->seq[index])
465 index = 0;
466 tone->index = index;
467
468 /* set next tone */
469 if (pat->data[index] == DATA_S)
470 dsp_tone_hw_message(dsp, 0, 0);
471 else
472 dsp_tone_hw_message(dsp, pat->data[index], *(pat->siz[index]));
473 /* set timer */
474 init_timer(&tone->tl);
475 tone->tl.expires = jiffies + (pat->seq[index] * HZ) / 8000;
476 add_timer(&tone->tl);
477}
478
479
480/********************
481 * set/release tone *
482 ********************/
483
484/*
485 * tones are relaized by streaming or by special loop commands if supported
486 * by hardware. when hardware is used, the patterns will be controlled by
487 * timers.
488 */
489int
490dsp_tone(struct dsp *dsp, int tone)
491{
492 struct pattern *pat;
493 int i;
494 struct dsp_tone *tonet = &dsp->tone;
495
496 tonet->software = 0;
497 tonet->hardware = 0;
498
499 /* we turn off the tone */
500 if (!tone) {
501 if (dsp->features.hfc_loops)
502 if (timer_pending(&tonet->tl))
503 del_timer(&tonet->tl);
504 if (dsp->features.hfc_loops)
505 dsp_tone_hw_message(dsp, NULL, 0);
506 tonet->tone = 0;
507 return 0;
508 }
509
510 pat = NULL;
511 i = 0;
512 while (pattern[i].tone) {
513 if (pattern[i].tone == tone) {
514 pat = &pattern[i];
515 break;
516 }
517 i++;
518 }
519 if (!pat) {
520 printk(KERN_WARNING "dsp: given tone 0x%x is invalid\n", tone);
521 return -EINVAL;
522 }
523 if (dsp_debug & DEBUG_DSP_TONE)
524 printk(KERN_DEBUG "%s: now starting tone %d (index=%d)\n",
525 __func__, tone, 0);
526 tonet->tone = tone;
527 tonet->pattern = pat;
528 tonet->index = 0;
529 tonet->count = 0;
530
531 if (dsp->features.hfc_loops) {
532 tonet->hardware = 1;
533 /* set first tone */
534 dsp_tone_hw_message(dsp, pat->data[0], *(pat->siz[0]));
535 /* set timer */
536 if (timer_pending(&tonet->tl))
537 del_timer(&tonet->tl);
538 init_timer(&tonet->tl);
539 tonet->tl.expires = jiffies + (pat->seq[0] * HZ) / 8000;
540 add_timer(&tonet->tl);
541 } else {
542 tonet->software = 1;
543 }
544
545 return 0;
546}
547
548
549
550
551
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-02 03:19:30 -0400