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Commit | Line | Data |
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960366cf KK |
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 | ||
142 | static inline int | |
143 | count_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 | */ | |
156 | void | |
157 | dsp_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 | */ | |
192 | static struct dsp_conf * | |
193 | dsp_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 | */ | |
214 | static int | |
215 | dsp_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 | */ | |
259 | int | |
260 | dsp_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 | */ | |
303 | static 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 | */ | |
331 | int | |
332 | dsp_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 | */ | |
355 | static void | |
356 | dsp_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 | */ | |
378 | void | |
379 | dsp_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); | |
396 | one_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)) | |
9e9540b8 | 455 | freeslots[finddsp->pcm_slot_rx] = 0; |
960366cf KK |
456 | if (finddsp->pcm_slot_tx >= 0 && |
457 | finddsp->pcm_slot_tx < sizeof(freeslots)) | |
9e9540b8 | 458 | freeslots[finddsp->pcm_slot_tx] = 0; |
960366cf KK |
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); | |
512 | conf_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) { | |
941 | join_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 | */ | |
1043 | int | |
1044 | dsp_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 | */ | |
1142 | void | |
1143 | dsp_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); | |
8dd2f36f AE |
1171 | if (dsp->cmx_delay) |
1172 | dsp->rx_W = (dsp->rx_R + dsp->cmx_delay) | |
1173 | & CMX_BUFF_MASK; | |
1174 | else | |
1175 | dsp->rx_W = (dsp->rx_R + (dsp_poll >> 1)) | |
1176 | & CMX_BUFF_MASK; | |
960366cf KK |
1177 | } else { |
1178 | dsp->rx_R = 0; | |
8dd2f36f AE |
1179 | if (dsp->cmx_delay) |
1180 | dsp->rx_W = dsp->cmx_delay; | |
1181 | else | |
1182 | dsp->rx_W = dsp_poll >> 1; | |
960366cf KK |
1183 | } |
1184 | } | |
1185 | /* if frame contains time code, write directly */ | |
1186 | if (dsp->features.unordered) { | |
1187 | dsp->rx_W = (hh->id & CMX_BUFF_MASK); | |
1188 | /* printk(KERN_DEBUG "%s %08x\n", dsp->name, hh->id); */ | |
1189 | } | |
1190 | /* | |
1191 | * if we underrun (or maybe overrun), | |
1192 | * we set our new read pointer, and write silence to buffer | |
1193 | */ | |
1194 | if (((dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK) >= CMX_BUFF_HALF) { | |
190f71d9 | 1195 | if (dsp_debug & DEBUG_DSP_CLOCK) |
960366cf KK |
1196 | printk(KERN_DEBUG |
1197 | "cmx_receive(dsp=%lx): UNDERRUN (or overrun the " | |
1198 | "maximum delay), adjusting read pointer! " | |
1199 | "(inst %s)\n", (u_long)dsp, dsp->name); | |
8dd2f36f | 1200 | /* flush rx buffer and set delay to dsp_poll / 2 */ |
960366cf KK |
1201 | if (dsp->features.unordered) { |
1202 | dsp->rx_R = (hh->id & CMX_BUFF_MASK); | |
8dd2f36f AE |
1203 | if (dsp->cmx_delay) |
1204 | dsp->rx_W = (dsp->rx_R + dsp->cmx_delay) | |
1205 | & CMX_BUFF_MASK; | |
1206 | dsp->rx_W = (dsp->rx_R + (dsp_poll >> 1)) | |
1207 | & CMX_BUFF_MASK; | |
960366cf KK |
1208 | } else { |
1209 | dsp->rx_R = 0; | |
8dd2f36f AE |
1210 | if (dsp->cmx_delay) |
1211 | dsp->rx_W = dsp->cmx_delay; | |
1212 | else | |
1213 | dsp->rx_W = dsp_poll >> 1; | |
960366cf KK |
1214 | } |
1215 | memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff)); | |
1216 | } | |
1217 | /* if we have reached double delay, jump back to middle */ | |
1218 | if (dsp->cmx_delay) | |
1219 | if (((dsp->rx_W - dsp->rx_R) & CMX_BUFF_MASK) >= | |
1220 | (dsp->cmx_delay << 1)) { | |
190f71d9 | 1221 | if (dsp_debug & DEBUG_DSP_CLOCK) |
960366cf KK |
1222 | printk(KERN_DEBUG |
1223 | "cmx_receive(dsp=%lx): OVERRUN (because " | |
1224 | "twice the delay is reached), adjusting " | |
1225 | "read pointer! (inst %s)\n", | |
1226 | (u_long)dsp, dsp->name); | |
1227 | /* flush buffer */ | |
1228 | if (dsp->features.unordered) { | |
1229 | dsp->rx_R = (hh->id & CMX_BUFF_MASK); | |
1230 | dsp->rx_W = (dsp->rx_R + dsp->cmx_delay) | |
1231 | & CMX_BUFF_MASK; | |
1232 | } else { | |
1233 | dsp->rx_R = 0; | |
1234 | dsp->rx_W = dsp->cmx_delay; | |
1235 | } | |
1236 | memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff)); | |
1237 | } | |
1238 | ||
1239 | /* show where to write */ | |
1240 | #ifdef CMX_DEBUG | |
1241 | printk(KERN_DEBUG | |
1242 | "cmx_receive(dsp=%lx): rx_R(dsp)=%05x rx_W(dsp)=%05x len=%d %s\n", | |
1243 | (u_long)dsp, dsp->rx_R, dsp->rx_W, len, dsp->name); | |
1244 | #endif | |
1245 | ||
1246 | /* write data into rx_buffer */ | |
1247 | p = skb->data; | |
1248 | d = dsp->rx_buff; | |
1249 | w = dsp->rx_W; | |
1250 | i = 0; | |
1251 | ii = len; | |
1252 | while (i < ii) { | |
1253 | d[w++ & CMX_BUFF_MASK] = *p++; | |
1254 | i++; | |
1255 | } | |
1256 | ||
1257 | /* increase write-pointer */ | |
1258 | dsp->rx_W = ((dsp->rx_W+len) & CMX_BUFF_MASK); | |
1259 | } | |
1260 | ||
1261 | ||
1262 | /* | |
1263 | * send (mixed) audio data to card and control jitter | |
1264 | */ | |
1265 | static void | |
1266 | dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members) | |
1267 | { | |
1268 | struct dsp_conf *conf = dsp->conf; | |
1269 | struct dsp *member, *other; | |
1270 | register s32 sample; | |
1271 | u8 *d, *p, *q, *o_q; | |
1272 | struct sk_buff *nskb, *txskb; | |
1273 | int r, rr, t, tt, o_r, o_rr; | |
1274 | int preload = 0; | |
1275 | struct mISDNhead *hh, *thh; | |
1276 | ||
1277 | /* don't process if: */ | |
1278 | if (!dsp->b_active) { /* if not active */ | |
1279 | dsp->last_tx = 0; | |
1280 | return; | |
1281 | } | |
1282 | if (dsp->pcm_slot_tx >= 0 && /* connected to pcm slot */ | |
1283 | dsp->tx_R == dsp->tx_W && /* AND no tx-data */ | |
1284 | !(dsp->tone.tone && dsp->tone.software)) { /* AND not soft tones */ | |
1285 | dsp->last_tx = 0; | |
1286 | return; | |
1287 | } | |
1288 | ||
1289 | #ifdef CMX_DEBUG | |
1290 | printk(KERN_DEBUG | |
1291 | "SEND members=%d dsp=%s, conf=%p, rx_R=%05x rx_W=%05x\n", | |
1292 | members, dsp->name, conf, dsp->rx_R, dsp->rx_W); | |
1293 | #endif | |
1294 | ||
1295 | /* preload if we have delay set */ | |
1296 | if (dsp->cmx_delay && !dsp->last_tx) { | |
1297 | preload = len; | |
1298 | if (preload < 128) | |
1299 | preload = 128; | |
1300 | } | |
1301 | ||
1302 | /* PREPARE RESULT */ | |
1303 | nskb = mI_alloc_skb(len + preload, GFP_ATOMIC); | |
1304 | if (!nskb) { | |
1305 | printk(KERN_ERR | |
1306 | "FATAL ERROR in mISDN_dsp.o: cannot alloc %d bytes\n", | |
1307 | len + preload); | |
1308 | return; | |
1309 | } | |
1310 | hh = mISDN_HEAD_P(nskb); | |
1311 | hh->prim = PH_DATA_REQ; | |
1312 | hh->id = 0; | |
1313 | dsp->last_tx = 1; | |
1314 | ||
1315 | /* set pointers, indexes and stuff */ | |
1316 | member = dsp; | |
1317 | p = dsp->tx_buff; /* transmit data */ | |
1318 | q = dsp->rx_buff; /* received data */ | |
1319 | d = skb_put(nskb, preload + len); /* result */ | |
1320 | t = dsp->tx_R; /* tx-pointers */ | |
1321 | tt = dsp->tx_W; | |
1322 | r = dsp->rx_R; /* rx-pointers */ | |
1323 | rr = (r + len) & CMX_BUFF_MASK; | |
1324 | ||
1325 | /* preload with silence, if required */ | |
1326 | if (preload) { | |
1327 | memset(d, dsp_silence, preload); | |
1328 | d += preload; | |
1329 | } | |
1330 | ||
1331 | /* PROCESS TONES/TX-DATA ONLY */ | |
1332 | if (dsp->tone.tone && dsp->tone.software) { | |
1333 | /* -> copy tone */ | |
1334 | dsp_tone_copy(dsp, d, len); | |
1335 | dsp->tx_R = 0; /* clear tx buffer */ | |
1336 | dsp->tx_W = 0; | |
1337 | goto send_packet; | |
1338 | } | |
1339 | /* if we have tx-data but do not use mixing */ | |
1340 | if (!dsp->tx_mix && t != tt) { | |
1341 | /* -> send tx-data and continue when not enough */ | |
1342 | #ifdef CMX_TX_DEBUG | |
1343 | sprintf(debugbuf, "TX sending (%04x-%04x)%p: ", t, tt, p); | |
1344 | #endif | |
1345 | while (r != rr && t != tt) { | |
1346 | #ifdef CMX_TX_DEBUG | |
1347 | if (strlen(debugbuf) < 48) | |
1348 | sprintf(debugbuf+strlen(debugbuf), " %02x", p[t]); | |
1349 | #endif | |
1350 | *d++ = p[t]; /* write tx_buff */ | |
1351 | t = (t+1) & CMX_BUFF_MASK; | |
1352 | r = (r+1) & CMX_BUFF_MASK; | |
1353 | } | |
1354 | if (r == rr) { | |
1355 | dsp->tx_R = t; | |
1356 | #ifdef CMX_TX_DEBUG | |
1357 | printk(KERN_DEBUG "%s\n", debugbuf); | |
1358 | #endif | |
1359 | goto send_packet; | |
1360 | } | |
1361 | } | |
1362 | #ifdef CMX_TX_DEBUG | |
1363 | printk(KERN_DEBUG "%s\n", debugbuf); | |
1364 | #endif | |
1365 | ||
1366 | /* PROCESS DATA (one member / no conf) */ | |
1367 | if (!conf || members <= 1) { | |
1368 | /* -> if echo is NOT enabled */ | |
1369 | if (!dsp->echo) { | |
1370 | /* -> send tx-data if available or use 0-volume */ | |
1371 | while (r != rr && t != tt) { | |
1372 | *d++ = p[t]; /* write tx_buff */ | |
1373 | t = (t+1) & CMX_BUFF_MASK; | |
1374 | r = (r+1) & CMX_BUFF_MASK; | |
1375 | } | |
8dd2f36f | 1376 | if (r != rr) { |
190f71d9 AE |
1377 | if (dsp_debug & DEBUG_DSP_CLOCK) |
1378 | printk(KERN_DEBUG "%s: RX empty\n", | |
1379 | __func__); | |
960366cf | 1380 | memset(d, dsp_silence, (rr-r)&CMX_BUFF_MASK); |
8dd2f36f | 1381 | } |
960366cf KK |
1382 | /* -> if echo is enabled */ |
1383 | } else { | |
1384 | /* | |
1385 | * -> mix tx-data with echo if available, | |
1386 | * or use echo only | |
1387 | */ | |
1388 | while (r != rr && t != tt) { | |
1389 | *d++ = dsp_audio_mix_law[(p[t]<<8)|q[r]]; | |
1390 | t = (t+1) & CMX_BUFF_MASK; | |
1391 | r = (r+1) & CMX_BUFF_MASK; | |
1392 | } | |
1393 | while (r != rr) { | |
1394 | *d++ = q[r]; /* echo */ | |
1395 | r = (r+1) & CMX_BUFF_MASK; | |
1396 | } | |
1397 | } | |
1398 | dsp->tx_R = t; | |
1399 | goto send_packet; | |
1400 | } | |
1401 | /* PROCESS DATA (two members) */ | |
1402 | #ifdef CMX_CONF_DEBUG | |
1403 | if (0) { | |
1404 | #else | |
1405 | if (members == 2) { | |
1406 | #endif | |
1407 | /* "other" becomes other party */ | |
1408 | other = (list_entry(conf->mlist.next, | |
1409 | struct dsp_conf_member, list))->dsp; | |
1410 | if (other == member) | |
1411 | other = (list_entry(conf->mlist.prev, | |
1412 | struct dsp_conf_member, list))->dsp; | |
1413 | o_q = other->rx_buff; /* received data */ | |
1414 | o_rr = (other->rx_R + len) & CMX_BUFF_MASK; | |
1415 | /* end of rx-pointer */ | |
1416 | o_r = (o_rr - rr + r) & CMX_BUFF_MASK; | |
1417 | /* start rx-pointer at current read position*/ | |
1418 | /* -> if echo is NOT enabled */ | |
1419 | if (!dsp->echo) { | |
1420 | /* | |
1421 | * -> copy other member's rx-data, | |
1422 | * if tx-data is available, mix | |
1423 | */ | |
1424 | while (o_r != o_rr && t != tt) { | |
1425 | *d++ = dsp_audio_mix_law[(p[t]<<8)|o_q[o_r]]; | |
1426 | t = (t+1) & CMX_BUFF_MASK; | |
1427 | o_r = (o_r+1) & CMX_BUFF_MASK; | |
1428 | } | |
1429 | while (o_r != o_rr) { | |
1430 | *d++ = o_q[o_r]; | |
1431 | o_r = (o_r+1) & CMX_BUFF_MASK; | |
1432 | } | |
1433 | /* -> if echo is enabled */ | |
1434 | } else { | |
1435 | /* | |
1436 | * -> mix other member's rx-data with echo, | |
1437 | * if tx-data is available, mix | |
1438 | */ | |
1439 | while (r != rr && t != tt) { | |
1440 | sample = dsp_audio_law_to_s32[p[t]] + | |
1441 | dsp_audio_law_to_s32[q[r]] + | |
1442 | dsp_audio_law_to_s32[o_q[o_r]]; | |
1443 | if (sample < -32768) | |
1444 | sample = -32768; | |
1445 | else if (sample > 32767) | |
1446 | sample = 32767; | |
1447 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1448 | /* tx-data + rx_data + echo */ | |
1449 | t = (t+1) & CMX_BUFF_MASK; | |
1450 | r = (r+1) & CMX_BUFF_MASK; | |
1451 | o_r = (o_r+1) & CMX_BUFF_MASK; | |
1452 | } | |
1453 | while (r != rr) { | |
1454 | *d++ = dsp_audio_mix_law[(q[r]<<8)|o_q[o_r]]; | |
1455 | r = (r+1) & CMX_BUFF_MASK; | |
1456 | o_r = (o_r+1) & CMX_BUFF_MASK; | |
1457 | } | |
1458 | } | |
1459 | dsp->tx_R = t; | |
1460 | goto send_packet; | |
1461 | } | |
1462 | #ifdef DSP_NEVER_DEFINED | |
1463 | } | |
1464 | #endif | |
1465 | /* PROCESS DATA (three or more members) */ | |
1466 | /* -> if echo is NOT enabled */ | |
1467 | if (!dsp->echo) { | |
1468 | /* | |
1469 | * -> substract rx-data from conf-data, | |
1470 | * if tx-data is available, mix | |
1471 | */ | |
1472 | while (r != rr && t != tt) { | |
1473 | sample = dsp_audio_law_to_s32[p[t]] + *c++ - | |
1474 | dsp_audio_law_to_s32[q[r]]; | |
1475 | if (sample < -32768) | |
1476 | sample = -32768; | |
1477 | else if (sample > 32767) | |
1478 | sample = 32767; | |
1479 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1480 | /* conf-rx+tx */ | |
1481 | r = (r+1) & CMX_BUFF_MASK; | |
1482 | t = (t+1) & CMX_BUFF_MASK; | |
1483 | } | |
1484 | while (r != rr) { | |
1485 | sample = *c++ - dsp_audio_law_to_s32[q[r]]; | |
1486 | if (sample < -32768) | |
1487 | sample = -32768; | |
1488 | else if (sample > 32767) | |
1489 | sample = 32767; | |
1490 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1491 | /* conf-rx */ | |
1492 | r = (r+1) & CMX_BUFF_MASK; | |
1493 | } | |
1494 | /* -> if echo is enabled */ | |
1495 | } else { | |
1496 | /* | |
1497 | * -> encode conf-data, if tx-data | |
1498 | * is available, mix | |
1499 | */ | |
1500 | while (r != rr && t != tt) { | |
1501 | sample = dsp_audio_law_to_s32[p[t]] + *c++; | |
1502 | if (sample < -32768) | |
1503 | sample = -32768; | |
1504 | else if (sample > 32767) | |
1505 | sample = 32767; | |
1506 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1507 | /* conf(echo)+tx */ | |
1508 | t = (t+1) & CMX_BUFF_MASK; | |
1509 | r = (r+1) & CMX_BUFF_MASK; | |
1510 | } | |
1511 | while (r != rr) { | |
1512 | sample = *c++; | |
1513 | if (sample < -32768) | |
1514 | sample = -32768; | |
1515 | else if (sample > 32767) | |
1516 | sample = 32767; | |
1517 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1518 | /* conf(echo) */ | |
1519 | r = (r+1) & CMX_BUFF_MASK; | |
1520 | } | |
1521 | } | |
1522 | dsp->tx_R = t; | |
1523 | goto send_packet; | |
1524 | ||
1525 | send_packet: | |
1526 | /* | |
1527 | * send tx-data if enabled - don't filter, | |
1528 | * becuase we want what we send, not what we filtered | |
1529 | */ | |
1530 | if (dsp->tx_data) { | |
1531 | /* PREPARE RESULT */ | |
1532 | txskb = mI_alloc_skb(len, GFP_ATOMIC); | |
1533 | if (!txskb) { | |
1534 | printk(KERN_ERR | |
1535 | "FATAL ERROR in mISDN_dsp.o: " | |
1536 | "cannot alloc %d bytes\n", len); | |
1537 | } else { | |
1538 | thh = mISDN_HEAD_P(txskb); | |
1539 | thh->prim = DL_DATA_REQ; | |
1540 | thh->id = 0; | |
1541 | memcpy(skb_put(txskb, len), nskb->data+preload, len); | |
1542 | /* queue (trigger later) */ | |
1543 | skb_queue_tail(&dsp->sendq, txskb); | |
1544 | } | |
1545 | } | |
1546 | /* adjust volume */ | |
1547 | if (dsp->tx_volume) | |
1548 | dsp_change_volume(nskb, dsp->tx_volume); | |
1549 | /* pipeline */ | |
1550 | if (dsp->pipeline.inuse) | |
1551 | dsp_pipeline_process_tx(&dsp->pipeline, nskb->data, nskb->len); | |
1552 | /* crypt */ | |
1553 | if (dsp->bf_enable) | |
1554 | dsp_bf_encrypt(dsp, nskb->data, nskb->len); | |
1555 | /* queue and trigger */ | |
1556 | skb_queue_tail(&dsp->sendq, nskb); | |
1557 | schedule_work(&dsp->workq); | |
1558 | } | |
1559 | ||
5b834354 | 1560 | static u32 samplecount; |
960366cf KK |
1561 | struct timer_list dsp_spl_tl; |
1562 | u32 dsp_spl_jiffies; /* calculate the next time to fire */ | |
047ce8f2 | 1563 | #ifdef UNUSED |
5b834354 | 1564 | static u32 dsp_start_jiffies; /* jiffies at the time, the calculation begins */ |
047ce8f2 | 1565 | #endif /* UNUSED */ |
5b834354 | 1566 | static struct timeval dsp_start_tv; /* time at start of calculation */ |
960366cf KK |
1567 | |
1568 | void | |
1569 | dsp_cmx_send(void *arg) | |
1570 | { | |
1571 | struct dsp_conf *conf; | |
1572 | struct dsp_conf_member *member; | |
1573 | struct dsp *dsp; | |
1574 | int mustmix, members; | |
1575 | s32 mixbuffer[MAX_POLL+100], *c; | |
1576 | u8 *p, *q; | |
1577 | int r, rr; | |
1578 | int jittercheck = 0, delay, i; | |
1579 | u_long flags; | |
1580 | struct timeval tv; | |
1581 | u32 elapsed; | |
1582 | s16 length; | |
1583 | ||
1584 | /* lock */ | |
1585 | spin_lock_irqsave(&dsp_lock, flags); | |
1586 | ||
1587 | if (!dsp_start_tv.tv_sec) { | |
1588 | do_gettimeofday(&dsp_start_tv); | |
1589 | length = dsp_poll; | |
1590 | } else { | |
1591 | do_gettimeofday(&tv); | |
1592 | elapsed = ((tv.tv_sec - dsp_start_tv.tv_sec) * 8000) | |
1593 | + ((s32)(tv.tv_usec / 125) - (dsp_start_tv.tv_usec / 125)); | |
1594 | dsp_start_tv.tv_sec = tv.tv_sec; | |
1595 | dsp_start_tv.tv_usec = tv.tv_usec; | |
1596 | length = elapsed; | |
1597 | } | |
1598 | if (length > MAX_POLL + 100) | |
1599 | length = MAX_POLL + 100; | |
1600 | /* printk(KERN_DEBUG "len=%d dsp_count=0x%x.%04x dsp_poll_diff=0x%x.%04x\n", | |
1601 | length, dsp_count >> 16, dsp_count & 0xffff, dsp_poll_diff >> 16, | |
1602 | dsp_poll_diff & 0xffff); | |
1603 | */ | |
1604 | ||
1605 | /* | |
1606 | * check if jitter needs to be checked | |
1607 | * (this is about every second = 8192 samples) | |
1608 | */ | |
1609 | samplecount += length; | |
1610 | if ((samplecount & 8191) < length) | |
1611 | jittercheck = 1; | |
1612 | ||
1613 | /* loop all members that do not require conference mixing */ | |
1614 | list_for_each_entry(dsp, &dsp_ilist, list) { | |
1615 | if (dsp->hdlc) | |
1616 | continue; | |
1617 | conf = dsp->conf; | |
1618 | mustmix = 0; | |
1619 | members = 0; | |
1620 | if (conf) { | |
1621 | members = count_list_member(&conf->mlist); | |
1622 | #ifdef CMX_CONF_DEBUG | |
1623 | if (conf->software && members > 1) | |
1624 | #else | |
1625 | if (conf->software && members > 2) | |
1626 | #endif | |
1627 | mustmix = 1; | |
1628 | } | |
1629 | ||
1630 | /* transmission required */ | |
1631 | if (!mustmix) { | |
1632 | dsp_cmx_send_member(dsp, length, mixbuffer, members); | |
1633 | ||
1634 | /* | |
1635 | * unused mixbuffer is given to prevent a | |
1636 | * potential null-pointer-bug | |
1637 | */ | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | /* loop all members that require conference mixing */ | |
1642 | list_for_each_entry(conf, &conf_ilist, list) { | |
1643 | /* count members and check hardware */ | |
1644 | members = count_list_member(&conf->mlist); | |
1645 | #ifdef CMX_CONF_DEBUG | |
1646 | if (conf->software && members > 1) { | |
1647 | #else | |
1648 | if (conf->software && members > 2) { | |
1649 | #endif | |
1650 | /* check for hdlc conf */ | |
1651 | member = list_entry(conf->mlist.next, | |
1652 | struct dsp_conf_member, list); | |
1653 | if (member->dsp->hdlc) | |
1654 | continue; | |
1655 | /* mix all data */ | |
1656 | memset(mixbuffer, 0, length*sizeof(s32)); | |
1657 | list_for_each_entry(member, &conf->mlist, list) { | |
1658 | dsp = member->dsp; | |
1659 | /* get range of data to mix */ | |
1660 | c = mixbuffer; | |
1661 | q = dsp->rx_buff; | |
1662 | r = dsp->rx_R; | |
1663 | rr = (r + length) & CMX_BUFF_MASK; | |
1664 | /* add member's data */ | |
1665 | while (r != rr) { | |
1666 | *c++ += dsp_audio_law_to_s32[q[r]]; | |
1667 | r = (r+1) & CMX_BUFF_MASK; | |
1668 | } | |
1669 | } | |
1670 | ||
1671 | /* process each member */ | |
1672 | list_for_each_entry(member, &conf->mlist, list) { | |
1673 | /* transmission */ | |
1674 | dsp_cmx_send_member(member->dsp, length, | |
1675 | mixbuffer, members); | |
1676 | } | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | /* delete rx-data, increment buffers, change pointers */ | |
1681 | list_for_each_entry(dsp, &dsp_ilist, list) { | |
1682 | if (dsp->hdlc) | |
1683 | continue; | |
1684 | p = dsp->rx_buff; | |
1685 | q = dsp->tx_buff; | |
1686 | r = dsp->rx_R; | |
1687 | /* move receive pointer when receiving */ | |
1688 | if (!dsp->rx_is_off) { | |
1689 | rr = (r + length) & CMX_BUFF_MASK; | |
1690 | /* delete rx-data */ | |
1691 | while (r != rr) { | |
1692 | p[r] = dsp_silence; | |
1693 | r = (r+1) & CMX_BUFF_MASK; | |
1694 | } | |
1695 | /* increment rx-buffer pointer */ | |
1696 | dsp->rx_R = r; /* write incremented read pointer */ | |
1697 | } | |
1698 | ||
1699 | /* check current rx_delay */ | |
1700 | delay = (dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK; | |
1701 | if (delay >= CMX_BUFF_HALF) | |
1702 | delay = 0; /* will be the delay before next write */ | |
1703 | /* check for lower delay */ | |
1704 | if (delay < dsp->rx_delay[0]) | |
1705 | dsp->rx_delay[0] = delay; | |
1706 | /* check current tx_delay */ | |
1707 | delay = (dsp->tx_W-dsp->tx_R) & CMX_BUFF_MASK; | |
1708 | if (delay >= CMX_BUFF_HALF) | |
1709 | delay = 0; /* will be the delay before next write */ | |
1710 | /* check for lower delay */ | |
1711 | if (delay < dsp->tx_delay[0]) | |
1712 | dsp->tx_delay[0] = delay; | |
1713 | if (jittercheck) { | |
1714 | /* find the lowest of all rx_delays */ | |
1715 | delay = dsp->rx_delay[0]; | |
1716 | i = 1; | |
1717 | while (i < MAX_SECONDS_JITTER_CHECK) { | |
1718 | if (delay > dsp->rx_delay[i]) | |
1719 | delay = dsp->rx_delay[i]; | |
1720 | i++; | |
1721 | } | |
1722 | /* | |
1723 | * remove rx_delay only if we have delay AND we | |
8dd2f36f AE |
1724 | * have not preset cmx_delay AND |
1725 | * the delay is greater dsp_poll | |
960366cf | 1726 | */ |
8dd2f36f | 1727 | if (delay > dsp_poll && !dsp->cmx_delay) { |
190f71d9 | 1728 | if (dsp_debug & DEBUG_DSP_CLOCK) |
960366cf KK |
1729 | printk(KERN_DEBUG |
1730 | "%s lowest rx_delay of %d bytes for" | |
1731 | " dsp %s are now removed.\n", | |
1732 | __func__, delay, | |
1733 | dsp->name); | |
1734 | r = dsp->rx_R; | |
8dd2f36f AE |
1735 | rr = (r + delay - (dsp_poll >> 1)) |
1736 | & CMX_BUFF_MASK; | |
960366cf KK |
1737 | /* delete rx-data */ |
1738 | while (r != rr) { | |
1739 | p[r] = dsp_silence; | |
1740 | r = (r+1) & CMX_BUFF_MASK; | |
1741 | } | |
1742 | /* increment rx-buffer pointer */ | |
1743 | dsp->rx_R = r; | |
1744 | /* write incremented read pointer */ | |
1745 | } | |
1746 | /* find the lowest of all tx_delays */ | |
1747 | delay = dsp->tx_delay[0]; | |
1748 | i = 1; | |
1749 | while (i < MAX_SECONDS_JITTER_CHECK) { | |
1750 | if (delay > dsp->tx_delay[i]) | |
1751 | delay = dsp->tx_delay[i]; | |
1752 | i++; | |
1753 | } | |
1754 | /* | |
1755 | * remove delay only if we have delay AND we | |
1756 | * have enabled tx_dejitter | |
1757 | */ | |
8dd2f36f | 1758 | if (delay > dsp_poll && dsp->tx_dejitter) { |
190f71d9 | 1759 | if (dsp_debug & DEBUG_DSP_CLOCK) |
960366cf KK |
1760 | printk(KERN_DEBUG |
1761 | "%s lowest tx_delay of %d bytes for" | |
1762 | " dsp %s are now removed.\n", | |
1763 | __func__, delay, | |
1764 | dsp->name); | |
1765 | r = dsp->tx_R; | |
8dd2f36f AE |
1766 | rr = (r + delay - (dsp_poll >> 1)) |
1767 | & CMX_BUFF_MASK; | |
960366cf KK |
1768 | /* delete tx-data */ |
1769 | while (r != rr) { | |
1770 | q[r] = dsp_silence; | |
1771 | r = (r+1) & CMX_BUFF_MASK; | |
1772 | } | |
1773 | /* increment rx-buffer pointer */ | |
1774 | dsp->tx_R = r; | |
1775 | /* write incremented read pointer */ | |
1776 | } | |
1777 | /* scroll up delays */ | |
1778 | i = MAX_SECONDS_JITTER_CHECK - 1; | |
1779 | while (i) { | |
1780 | dsp->rx_delay[i] = dsp->rx_delay[i-1]; | |
1781 | dsp->tx_delay[i] = dsp->tx_delay[i-1]; | |
1782 | i--; | |
1783 | } | |
1784 | dsp->tx_delay[0] = CMX_BUFF_HALF; /* (infinite) delay */ | |
1785 | dsp->rx_delay[0] = CMX_BUFF_HALF; /* (infinite) delay */ | |
1786 | } | |
1787 | } | |
1788 | ||
1789 | /* if next event would be in the past ... */ | |
1790 | if ((s32)(dsp_spl_jiffies+dsp_tics-jiffies) <= 0) | |
1791 | dsp_spl_jiffies = jiffies + 1; | |
1792 | else | |
1793 | dsp_spl_jiffies += dsp_tics; | |
1794 | ||
1795 | dsp_spl_tl.expires = dsp_spl_jiffies; | |
1796 | add_timer(&dsp_spl_tl); | |
1797 | ||
1798 | /* unlock */ | |
1799 | spin_unlock_irqrestore(&dsp_lock, flags); | |
1800 | } | |
1801 | ||
1802 | /* | |
1803 | * audio data is transmitted from upper layer to the dsp | |
1804 | */ | |
1805 | void | |
1806 | dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb) | |
1807 | { | |
1808 | u_int w, ww; | |
1809 | u8 *d, *p; | |
1810 | int space; /* todo: , l = skb->len; */ | |
1811 | #ifdef CMX_TX_DEBUG | |
1812 | char debugbuf[256] = ""; | |
1813 | #endif | |
1814 | ||
1815 | /* check if there is enough space, and then copy */ | |
1816 | w = dsp->tx_W; | |
1817 | ww = dsp->tx_R; | |
1818 | p = dsp->tx_buff; | |
1819 | d = skb->data; | |
8dd2f36f | 1820 | space = (ww - w - 1) & CMX_BUFF_MASK; |
960366cf | 1821 | /* write-pointer should not overrun nor reach read pointer */ |
8dd2f36f | 1822 | if (space < skb->len) { |
960366cf | 1823 | /* write to the space we have left */ |
8dd2f36f | 1824 | ww = (ww - 1) & CMX_BUFF_MASK; /* end one byte prior tx_R */ |
190f71d9 | 1825 | if (dsp_debug & DEBUG_DSP_CLOCK) |
0aafe75d PS |
1826 | printk(KERN_DEBUG "%s: TX overflow space=%d skb->len=" |
1827 | "%d, w=0x%04x, ww=0x%04x\n", __func__, space, | |
1828 | skb->len, w, ww); | |
8dd2f36f | 1829 | } else |
960366cf KK |
1830 | /* write until all byte are copied */ |
1831 | ww = (w + skb->len) & CMX_BUFF_MASK; | |
1832 | dsp->tx_W = ww; | |
1833 | ||
1834 | /* show current buffer */ | |
1835 | #ifdef CMX_DEBUG | |
1836 | printk(KERN_DEBUG | |
1837 | "cmx_transmit(dsp=%lx) %d bytes to 0x%x-0x%x. %s\n", | |
1838 | (u_long)dsp, (ww-w)&CMX_BUFF_MASK, w, ww, dsp->name); | |
1839 | #endif | |
1840 | ||
1841 | /* copy transmit data to tx-buffer */ | |
1842 | #ifdef CMX_TX_DEBUG | |
1843 | sprintf(debugbuf, "TX getting (%04x-%04x)%p: ", w, ww, p); | |
1844 | #endif | |
1845 | while (w != ww) { | |
1846 | #ifdef CMX_TX_DEBUG | |
1847 | if (strlen(debugbuf) < 48) | |
1848 | sprintf(debugbuf+strlen(debugbuf), " %02x", *d); | |
1849 | #endif | |
1850 | p[w] = *d++; | |
1851 | w = (w+1) & CMX_BUFF_MASK; | |
1852 | } | |
1853 | #ifdef CMX_TX_DEBUG | |
1854 | printk(KERN_DEBUG "%s\n", debugbuf); | |
1855 | #endif | |
1856 | ||
1857 | } | |
1858 | ||
1859 | /* | |
1860 | * hdlc data is received from card and sent to all members. | |
1861 | */ | |
1862 | void | |
1863 | dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb) | |
1864 | { | |
1865 | struct sk_buff *nskb = NULL; | |
1866 | struct dsp_conf_member *member; | |
1867 | struct mISDNhead *hh; | |
1868 | ||
1869 | /* not if not active */ | |
1870 | if (!dsp->b_active) | |
1871 | return; | |
1872 | ||
1873 | /* check if we have sompen */ | |
1874 | if (skb->len < 1) | |
1875 | return; | |
1876 | ||
1877 | /* no conf */ | |
1878 | if (!dsp->conf) { | |
1879 | /* in case of hardware (echo) */ | |
1880 | if (dsp->pcm_slot_tx >= 0) | |
1881 | return; | |
1882 | if (dsp->echo) | |
1883 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1884 | if (nskb) { | |
1885 | hh = mISDN_HEAD_P(nskb); | |
1886 | hh->prim = PH_DATA_REQ; | |
1887 | hh->id = 0; | |
1888 | skb_queue_tail(&dsp->sendq, nskb); | |
1889 | schedule_work(&dsp->workq); | |
1890 | } | |
1891 | return; | |
1892 | } | |
1893 | /* in case of hardware conference */ | |
1894 | if (dsp->conf->hardware) | |
1895 | return; | |
1896 | list_for_each_entry(member, &dsp->conf->mlist, list) { | |
1897 | if (dsp->echo || member->dsp != dsp) { | |
1898 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1899 | if (nskb) { | |
1900 | hh = mISDN_HEAD_P(nskb); | |
1901 | hh->prim = PH_DATA_REQ; | |
1902 | hh->id = 0; | |
1903 | skb_queue_tail(&member->dsp->sendq, nskb); | |
1904 | schedule_work(&member->dsp->workq); | |
1905 | } | |
1906 | } | |
1907 | } | |
1908 | } | |
1909 | ||
1910 |