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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 | |
48e34d0f | 115 | * will not be disabled but blocked to the upper layer. |
960366cf KK |
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 | ||
5a0e3ad6 | 127 | #include <linux/slab.h> |
960366cf KK |
128 | #include <linux/delay.h> |
129 | #include <linux/mISDNif.h> | |
130 | #include <linux/mISDNdsp.h> | |
131 | #include "core.h" | |
132 | #include "dsp.h" | |
133 | /* | |
134 | * debugging of multi party conference, | |
135 | * by using conference even with two members | |
136 | */ | |
137 | ||
138 | /* #define CMX_CONF_DEBUG */ | |
139 | ||
140 | /*#define CMX_DEBUG * massive read/write pointer output */ | |
87c5fa1b | 141 | /*#define CMX_DELAY_DEBUG * gives rx-buffer delay overview */ |
960366cf KK |
142 | /*#define CMX_TX_DEBUG * massive read/write on tx-buffer with content */ |
143 | ||
144 | static inline int | |
145 | count_list_member(struct list_head *head) | |
146 | { | |
147 | int cnt = 0; | |
148 | struct list_head *m; | |
149 | ||
150 | list_for_each(m, head) | |
151 | cnt++; | |
152 | return cnt; | |
153 | } | |
154 | ||
155 | /* | |
156 | * debug cmx memory structure | |
157 | */ | |
158 | void | |
159 | dsp_cmx_debug(struct dsp *dsp) | |
160 | { | |
161 | struct dsp_conf *conf; | |
162 | struct dsp_conf_member *member; | |
163 | struct dsp *odsp; | |
164 | ||
165 | printk(KERN_DEBUG "-----Current DSP\n"); | |
166 | list_for_each_entry(odsp, &dsp_ilist, list) { | |
bc138ec4 AE |
167 | printk(KERN_DEBUG "* %s hardecho=%d softecho=%d txmix=%d", |
168 | odsp->name, odsp->echo.hardware, odsp->echo.software, | |
169 | odsp->tx_mix); | |
960366cf KK |
170 | if (odsp->conf) |
171 | printk(" (Conf %d)", odsp->conf->id); | |
172 | if (dsp == odsp) | |
173 | printk(" *this*"); | |
174 | printk("\n"); | |
175 | } | |
176 | printk(KERN_DEBUG "-----Current Conf:\n"); | |
177 | list_for_each_entry(conf, &conf_ilist, list) { | |
178 | printk(KERN_DEBUG "* Conf %d (%p)\n", conf->id, conf); | |
179 | list_for_each_entry(member, &conf->mlist, list) { | |
180 | printk(KERN_DEBUG | |
181 | " - member = %s (slot_tx %d, bank_tx %d, " | |
bc138ec4 AE |
182 | "slot_rx %d, bank_rx %d hfc_conf %d " |
183 | "tx_data %d rx_is_off %d)%s\n", | |
960366cf KK |
184 | member->dsp->name, member->dsp->pcm_slot_tx, |
185 | member->dsp->pcm_bank_tx, member->dsp->pcm_slot_rx, | |
186 | member->dsp->pcm_bank_rx, member->dsp->hfc_conf, | |
bc138ec4 | 187 | member->dsp->tx_data, member->dsp->rx_is_off, |
960366cf KK |
188 | (member->dsp == dsp) ? " *this*" : ""); |
189 | } | |
190 | } | |
191 | printk(KERN_DEBUG "-----end\n"); | |
192 | } | |
193 | ||
194 | /* | |
195 | * search conference | |
196 | */ | |
197 | static struct dsp_conf * | |
198 | dsp_cmx_search_conf(u32 id) | |
199 | { | |
200 | struct dsp_conf *conf; | |
201 | ||
202 | if (!id) { | |
203 | printk(KERN_WARNING "%s: conference ID is 0.\n", __func__); | |
204 | return NULL; | |
205 | } | |
206 | ||
207 | /* search conference */ | |
208 | list_for_each_entry(conf, &conf_ilist, list) | |
209 | if (conf->id == id) | |
210 | return conf; | |
211 | ||
212 | return NULL; | |
213 | } | |
214 | ||
215 | ||
216 | /* | |
217 | * add member to conference | |
218 | */ | |
219 | static int | |
220 | dsp_cmx_add_conf_member(struct dsp *dsp, struct dsp_conf *conf) | |
221 | { | |
222 | struct dsp_conf_member *member; | |
223 | ||
224 | if (!conf || !dsp) { | |
225 | printk(KERN_WARNING "%s: conf or dsp is 0.\n", __func__); | |
226 | return -EINVAL; | |
227 | } | |
228 | if (dsp->member) { | |
229 | printk(KERN_WARNING "%s: dsp is already member in a conf.\n", | |
230 | __func__); | |
231 | return -EINVAL; | |
232 | } | |
233 | ||
234 | if (dsp->conf) { | |
235 | printk(KERN_WARNING "%s: dsp is already in a conf.\n", | |
236 | __func__); | |
237 | return -EINVAL; | |
238 | } | |
239 | ||
240 | member = kzalloc(sizeof(struct dsp_conf_member), GFP_ATOMIC); | |
241 | if (!member) { | |
eac74af9 | 242 | printk(KERN_ERR "kzalloc struct dsp_conf_member failed\n"); |
960366cf KK |
243 | return -ENOMEM; |
244 | } | |
245 | member->dsp = dsp; | |
246 | /* clear rx buffer */ | |
247 | memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff)); | |
248 | dsp->rx_init = 1; /* rx_W and rx_R will be adjusted on first frame */ | |
249 | dsp->rx_W = 0; | |
250 | dsp->rx_R = 0; | |
251 | ||
252 | list_add_tail(&member->list, &conf->mlist); | |
253 | ||
254 | dsp->conf = conf; | |
255 | dsp->member = member; | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | ||
261 | /* | |
262 | * del member from conference | |
263 | */ | |
264 | int | |
265 | dsp_cmx_del_conf_member(struct dsp *dsp) | |
266 | { | |
267 | struct dsp_conf_member *member; | |
268 | ||
269 | if (!dsp) { | |
270 | printk(KERN_WARNING "%s: dsp is 0.\n", | |
271 | __func__); | |
272 | return -EINVAL; | |
273 | } | |
274 | ||
275 | if (!dsp->conf) { | |
276 | printk(KERN_WARNING "%s: dsp is not in a conf.\n", | |
277 | __func__); | |
278 | return -EINVAL; | |
279 | } | |
280 | ||
281 | if (list_empty(&dsp->conf->mlist)) { | |
282 | printk(KERN_WARNING "%s: dsp has linked an empty conf.\n", | |
283 | __func__); | |
284 | return -EINVAL; | |
285 | } | |
286 | ||
287 | /* find us in conf */ | |
288 | list_for_each_entry(member, &dsp->conf->mlist, list) { | |
289 | if (member->dsp == dsp) { | |
290 | list_del(&member->list); | |
291 | dsp->conf = NULL; | |
292 | dsp->member = NULL; | |
293 | kfree(member); | |
294 | return 0; | |
295 | } | |
296 | } | |
297 | printk(KERN_WARNING | |
298 | "%s: dsp is not present in its own conf_meber list.\n", | |
299 | __func__); | |
300 | ||
301 | return -EINVAL; | |
302 | } | |
303 | ||
304 | ||
305 | /* | |
306 | * new conference | |
307 | */ | |
308 | static struct dsp_conf | |
309 | *dsp_cmx_new_conf(u32 id) | |
310 | { | |
311 | struct dsp_conf *conf; | |
312 | ||
313 | if (!id) { | |
314 | printk(KERN_WARNING "%s: id is 0.\n", | |
315 | __func__); | |
316 | return NULL; | |
317 | } | |
318 | ||
319 | conf = kzalloc(sizeof(struct dsp_conf), GFP_ATOMIC); | |
320 | if (!conf) { | |
eac74af9 | 321 | printk(KERN_ERR "kzalloc struct dsp_conf failed\n"); |
960366cf KK |
322 | return NULL; |
323 | } | |
324 | INIT_LIST_HEAD(&conf->mlist); | |
325 | conf->id = id; | |
326 | ||
327 | list_add_tail(&conf->list, &conf_ilist); | |
328 | ||
329 | return conf; | |
330 | } | |
331 | ||
332 | ||
333 | /* | |
334 | * del conference | |
335 | */ | |
336 | int | |
337 | dsp_cmx_del_conf(struct dsp_conf *conf) | |
338 | { | |
339 | if (!conf) { | |
340 | printk(KERN_WARNING "%s: conf is null.\n", | |
341 | __func__); | |
342 | return -EINVAL; | |
343 | } | |
344 | ||
345 | if (!list_empty(&conf->mlist)) { | |
346 | printk(KERN_WARNING "%s: conf not empty.\n", | |
347 | __func__); | |
348 | return -EINVAL; | |
349 | } | |
350 | list_del(&conf->list); | |
351 | kfree(conf); | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | ||
357 | /* | |
358 | * send HW message to hfc card | |
359 | */ | |
360 | static void | |
361 | dsp_cmx_hw_message(struct dsp *dsp, u32 message, u32 param1, u32 param2, | |
362 | u32 param3, u32 param4) | |
363 | { | |
364 | struct mISDN_ctrl_req cq; | |
365 | ||
366 | memset(&cq, 0, sizeof(cq)); | |
367 | cq.op = message; | |
368 | cq.p1 = param1 | (param2 << 8); | |
369 | cq.p2 = param3 | (param4 << 8); | |
370 | if (dsp->ch.peer) | |
371 | dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq); | |
372 | } | |
373 | ||
374 | ||
375 | /* | |
376 | * do hardware update and set the software/hardware flag | |
377 | * | |
378 | * either a conference or a dsp instance can be given | |
379 | * if only dsp instance is given, the instance is not associated with a conf | |
380 | * and therefore removed. if a conference is given, the dsp is expected to | |
381 | * be member of that conference. | |
382 | */ | |
383 | void | |
384 | dsp_cmx_hardware(struct dsp_conf *conf, struct dsp *dsp) | |
385 | { | |
386 | struct dsp_conf_member *member, *nextm; | |
387 | struct dsp *finddsp; | |
388 | int memb = 0, i, ii, i1, i2; | |
389 | int freeunits[8]; | |
390 | u_char freeslots[256]; | |
391 | int same_hfc = -1, same_pcm = -1, current_conf = -1, | |
bc138ec4 | 392 | all_conf = 1, tx_data = 0; |
960366cf KK |
393 | |
394 | /* dsp gets updated (no conf) */ | |
395 | if (!conf) { | |
396 | if (!dsp) | |
397 | return; | |
398 | if (dsp_debug & DEBUG_DSP_CMX) | |
399 | printk(KERN_DEBUG "%s checking dsp %s\n", | |
400 | __func__, dsp->name); | |
401 | one_member: | |
402 | /* remove HFC conference if enabled */ | |
403 | if (dsp->hfc_conf >= 0) { | |
404 | if (dsp_debug & DEBUG_DSP_CMX) | |
405 | printk(KERN_DEBUG | |
406 | "%s removing %s from HFC conf %d " | |
407 | "because dsp is split\n", __func__, | |
408 | dsp->name, dsp->hfc_conf); | |
409 | dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_CONF_SPLIT, | |
410 | 0, 0, 0, 0); | |
411 | dsp->hfc_conf = -1; | |
412 | } | |
413 | /* process hw echo */ | |
414 | if (dsp->features.pcm_banks < 1) | |
415 | return; | |
bc138ec4 | 416 | if (!dsp->echo.software && !dsp->echo.hardware) { |
960366cf KK |
417 | /* NO ECHO: remove PCM slot if assigned */ |
418 | if (dsp->pcm_slot_tx >= 0 || dsp->pcm_slot_rx >= 0) { | |
419 | if (dsp_debug & DEBUG_DSP_CMX) | |
420 | printk(KERN_DEBUG "%s removing %s from" | |
421 | " PCM slot %d (TX) %d (RX) because" | |
422 | " dsp is split (no echo)\n", | |
423 | __func__, dsp->name, | |
424 | dsp->pcm_slot_tx, dsp->pcm_slot_rx); | |
425 | dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_DISC, | |
426 | 0, 0, 0, 0); | |
427 | dsp->pcm_slot_tx = -1; | |
428 | dsp->pcm_bank_tx = -1; | |
429 | dsp->pcm_slot_rx = -1; | |
430 | dsp->pcm_bank_rx = -1; | |
431 | } | |
432 | return; | |
433 | } | |
bc138ec4 AE |
434 | /* echo is enabled, find out if we use soft or hardware */ |
435 | dsp->echo.software = dsp->tx_data; | |
436 | dsp->echo.hardware = 0; | |
960366cf KK |
437 | /* ECHO: already echo */ |
438 | if (dsp->pcm_slot_tx >= 0 && dsp->pcm_slot_rx < 0 && | |
bc138ec4 AE |
439 | dsp->pcm_bank_tx == 2 && dsp->pcm_bank_rx == 2) { |
440 | dsp->echo.hardware = 1; | |
960366cf | 441 | return; |
bc138ec4 | 442 | } |
960366cf KK |
443 | /* ECHO: if slot already assigned */ |
444 | if (dsp->pcm_slot_tx >= 0) { | |
445 | dsp->pcm_slot_rx = dsp->pcm_slot_tx; | |
446 | dsp->pcm_bank_tx = 2; /* 2 means loop */ | |
447 | dsp->pcm_bank_rx = 2; | |
448 | if (dsp_debug & DEBUG_DSP_CMX) | |
449 | printk(KERN_DEBUG | |
450 | "%s refresh %s for echo using slot %d\n", | |
451 | __func__, dsp->name, | |
452 | dsp->pcm_slot_tx); | |
453 | dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_CONN, | |
454 | dsp->pcm_slot_tx, 2, dsp->pcm_slot_rx, 2); | |
bc138ec4 | 455 | dsp->echo.hardware = 1; |
960366cf KK |
456 | return; |
457 | } | |
458 | /* ECHO: find slot */ | |
459 | dsp->pcm_slot_tx = -1; | |
460 | dsp->pcm_slot_rx = -1; | |
461 | memset(freeslots, 1, sizeof(freeslots)); | |
462 | list_for_each_entry(finddsp, &dsp_ilist, list) { | |
463 | if (finddsp->features.pcm_id == dsp->features.pcm_id) { | |
464 | if (finddsp->pcm_slot_rx >= 0 && | |
465 | finddsp->pcm_slot_rx < sizeof(freeslots)) | |
9e9540b8 | 466 | freeslots[finddsp->pcm_slot_rx] = 0; |
960366cf KK |
467 | if (finddsp->pcm_slot_tx >= 0 && |
468 | finddsp->pcm_slot_tx < sizeof(freeslots)) | |
9e9540b8 | 469 | freeslots[finddsp->pcm_slot_tx] = 0; |
960366cf KK |
470 | } |
471 | } | |
472 | i = 0; | |
473 | ii = dsp->features.pcm_slots; | |
474 | while (i < ii) { | |
475 | if (freeslots[i]) | |
476 | break; | |
477 | i++; | |
478 | } | |
479 | if (i == ii) { | |
480 | if (dsp_debug & DEBUG_DSP_CMX) | |
481 | printk(KERN_DEBUG | |
482 | "%s no slot available for echo\n", | |
483 | __func__); | |
484 | /* no more slots available */ | |
bc138ec4 | 485 | dsp->echo.software = 1; |
960366cf KK |
486 | return; |
487 | } | |
488 | /* assign free slot */ | |
489 | dsp->pcm_slot_tx = i; | |
490 | dsp->pcm_slot_rx = i; | |
491 | dsp->pcm_bank_tx = 2; /* loop */ | |
492 | dsp->pcm_bank_rx = 2; | |
493 | if (dsp_debug & DEBUG_DSP_CMX) | |
494 | printk(KERN_DEBUG | |
495 | "%s assign echo for %s using slot %d\n", | |
496 | __func__, dsp->name, dsp->pcm_slot_tx); | |
497 | dsp_cmx_hw_message(dsp, MISDN_CTRL_HFC_PCM_CONN, | |
498 | dsp->pcm_slot_tx, 2, dsp->pcm_slot_rx, 2); | |
bc138ec4 | 499 | dsp->echo.hardware = 1; |
960366cf KK |
500 | return; |
501 | } | |
502 | ||
503 | /* conf gets updated (all members) */ | |
504 | if (dsp_debug & DEBUG_DSP_CMX) | |
505 | printk(KERN_DEBUG "%s checking conference %d\n", | |
506 | __func__, conf->id); | |
507 | ||
508 | if (list_empty(&conf->mlist)) { | |
509 | printk(KERN_ERR "%s: conference whithout members\n", | |
510 | __func__); | |
511 | return; | |
512 | } | |
513 | member = list_entry(conf->mlist.next, struct dsp_conf_member, list); | |
514 | same_hfc = member->dsp->features.hfc_id; | |
515 | same_pcm = member->dsp->features.pcm_id; | |
516 | /* check all members in our conference */ | |
517 | list_for_each_entry(member, &conf->mlist, list) { | |
518 | /* check if member uses mixing */ | |
519 | if (member->dsp->tx_mix) { | |
520 | if (dsp_debug & DEBUG_DSP_CMX) | |
521 | printk(KERN_DEBUG | |
522 | "%s dsp %s cannot form a conf, because " | |
523 | "tx_mix is turned on\n", __func__, | |
524 | member->dsp->name); | |
525 | conf_software: | |
526 | list_for_each_entry(member, &conf->mlist, list) { | |
527 | dsp = member->dsp; | |
528 | /* remove HFC conference if enabled */ | |
529 | if (dsp->hfc_conf >= 0) { | |
530 | if (dsp_debug & DEBUG_DSP_CMX) | |
531 | printk(KERN_DEBUG | |
532 | "%s removing %s from HFC " | |
533 | "conf %d because not " | |
534 | "possible with hardware\n", | |
535 | __func__, | |
536 | dsp->name, | |
537 | dsp->hfc_conf); | |
538 | dsp_cmx_hw_message(dsp, | |
539 | MISDN_CTRL_HFC_CONF_SPLIT, | |
540 | 0, 0, 0, 0); | |
541 | dsp->hfc_conf = -1; | |
542 | } | |
543 | /* remove PCM slot if assigned */ | |
544 | if (dsp->pcm_slot_tx >= 0 || | |
545 | dsp->pcm_slot_rx >= 0) { | |
546 | if (dsp_debug & DEBUG_DSP_CMX) | |
547 | printk(KERN_DEBUG "%s removing " | |
548 | "%s from PCM slot %d (TX)" | |
549 | " slot %d (RX) because not" | |
550 | " possible with hardware\n", | |
551 | __func__, | |
552 | dsp->name, | |
553 | dsp->pcm_slot_tx, | |
554 | dsp->pcm_slot_rx); | |
555 | dsp_cmx_hw_message(dsp, | |
556 | MISDN_CTRL_HFC_PCM_DISC, | |
557 | 0, 0, 0, 0); | |
558 | dsp->pcm_slot_tx = -1; | |
559 | dsp->pcm_bank_tx = -1; | |
560 | dsp->pcm_slot_rx = -1; | |
561 | dsp->pcm_bank_rx = -1; | |
562 | } | |
563 | } | |
564 | conf->hardware = 0; | |
565 | conf->software = 1; | |
566 | return; | |
567 | } | |
568 | /* check if member has echo turned on */ | |
bc138ec4 | 569 | if (member->dsp->echo.hardware || member->dsp->echo.software) { |
960366cf KK |
570 | if (dsp_debug & DEBUG_DSP_CMX) |
571 | printk(KERN_DEBUG | |
572 | "%s dsp %s cannot form a conf, because " | |
573 | "echo is turned on\n", __func__, | |
574 | member->dsp->name); | |
575 | goto conf_software; | |
576 | } | |
577 | /* check if member has tx_mix turned on */ | |
578 | if (member->dsp->tx_mix) { | |
579 | if (dsp_debug & DEBUG_DSP_CMX) | |
580 | printk(KERN_DEBUG | |
581 | "%s dsp %s cannot form a conf, because " | |
582 | "tx_mix is turned on\n", | |
583 | __func__, member->dsp->name); | |
584 | goto conf_software; | |
585 | } | |
586 | /* check if member changes volume at an not suppoted level */ | |
587 | if (member->dsp->tx_volume) { | |
588 | if (dsp_debug & DEBUG_DSP_CMX) | |
589 | printk(KERN_DEBUG | |
590 | "%s dsp %s cannot form a conf, because " | |
591 | "tx_volume is changed\n", | |
592 | __func__, member->dsp->name); | |
593 | goto conf_software; | |
594 | } | |
595 | if (member->dsp->rx_volume) { | |
596 | if (dsp_debug & DEBUG_DSP_CMX) | |
597 | printk(KERN_DEBUG | |
598 | "%s dsp %s cannot form a conf, because " | |
599 | "rx_volume is changed\n", | |
600 | __func__, member->dsp->name); | |
601 | goto conf_software; | |
602 | } | |
603 | /* check if tx-data turned on */ | |
604 | if (member->dsp->tx_data) { | |
605 | if (dsp_debug & DEBUG_DSP_CMX) | |
606 | printk(KERN_DEBUG | |
bc138ec4 | 607 | "%s dsp %s tx_data is turned on\n", |
960366cf | 608 | __func__, member->dsp->name); |
bc138ec4 | 609 | tx_data = 1; |
960366cf KK |
610 | } |
611 | /* check if pipeline exists */ | |
612 | if (member->dsp->pipeline.inuse) { | |
613 | if (dsp_debug & DEBUG_DSP_CMX) | |
614 | printk(KERN_DEBUG | |
615 | "%s dsp %s cannot form a conf, because " | |
616 | "pipeline exists\n", __func__, | |
617 | member->dsp->name); | |
618 | goto conf_software; | |
619 | } | |
620 | /* check if encryption is enabled */ | |
621 | if (member->dsp->bf_enable) { | |
622 | if (dsp_debug & DEBUG_DSP_CMX) | |
623 | printk(KERN_DEBUG "%s dsp %s cannot form a " | |
624 | "conf, because encryption is enabled\n", | |
625 | __func__, member->dsp->name); | |
626 | goto conf_software; | |
627 | } | |
628 | /* check if member is on a card with PCM support */ | |
629 | if (member->dsp->features.pcm_id < 0) { | |
630 | if (dsp_debug & DEBUG_DSP_CMX) | |
631 | printk(KERN_DEBUG | |
632 | "%s dsp %s cannot form a conf, because " | |
633 | "dsp has no PCM bus\n", | |
634 | __func__, member->dsp->name); | |
635 | goto conf_software; | |
636 | } | |
637 | /* check if relations are on the same PCM bus */ | |
638 | if (member->dsp->features.pcm_id != same_pcm) { | |
639 | if (dsp_debug & DEBUG_DSP_CMX) | |
640 | printk(KERN_DEBUG | |
641 | "%s dsp %s cannot form a conf, because " | |
642 | "dsp is on a different PCM bus than the " | |
643 | "first dsp\n", | |
644 | __func__, member->dsp->name); | |
645 | goto conf_software; | |
646 | } | |
647 | /* determine if members are on the same hfc chip */ | |
648 | if (same_hfc != member->dsp->features.hfc_id) | |
649 | same_hfc = -1; | |
650 | /* if there are members already in a conference */ | |
651 | if (current_conf < 0 && member->dsp->hfc_conf >= 0) | |
652 | current_conf = member->dsp->hfc_conf; | |
653 | /* if any member is not in a conference */ | |
654 | if (member->dsp->hfc_conf < 0) | |
655 | all_conf = 0; | |
656 | ||
657 | memb++; | |
658 | } | |
659 | ||
660 | /* if no member, this is an error */ | |
661 | if (memb < 1) | |
662 | return; | |
663 | ||
664 | /* one member */ | |
665 | if (memb == 1) { | |
666 | if (dsp_debug & DEBUG_DSP_CMX) | |
667 | printk(KERN_DEBUG | |
668 | "%s conf %d cannot form a HW conference, " | |
669 | "because dsp is alone\n", __func__, conf->id); | |
670 | conf->hardware = 0; | |
671 | conf->software = 0; | |
672 | member = list_entry(conf->mlist.next, struct dsp_conf_member, | |
673 | list); | |
674 | dsp = member->dsp; | |
675 | goto one_member; | |
676 | } | |
677 | ||
678 | /* | |
679 | * ok, now we are sure that all members are on the same pcm. | |
680 | * now we will see if we have only two members, so we can do | |
681 | * crossconnections, which don't have any limitations. | |
682 | */ | |
683 | ||
684 | /* if we have only two members */ | |
685 | if (memb == 2) { | |
686 | member = list_entry(conf->mlist.next, struct dsp_conf_member, | |
687 | list); | |
688 | nextm = list_entry(member->list.next, struct dsp_conf_member, | |
689 | list); | |
690 | /* remove HFC conference if enabled */ | |
691 | if (member->dsp->hfc_conf >= 0) { | |
692 | if (dsp_debug & DEBUG_DSP_CMX) | |
693 | printk(KERN_DEBUG | |
694 | "%s removing %s from HFC conf %d because " | |
695 | "two parties require only a PCM slot\n", | |
696 | __func__, member->dsp->name, | |
697 | member->dsp->hfc_conf); | |
698 | dsp_cmx_hw_message(member->dsp, | |
699 | MISDN_CTRL_HFC_CONF_SPLIT, 0, 0, 0, 0); | |
700 | member->dsp->hfc_conf = -1; | |
701 | } | |
702 | if (nextm->dsp->hfc_conf >= 0) { | |
703 | if (dsp_debug & DEBUG_DSP_CMX) | |
704 | printk(KERN_DEBUG | |
705 | "%s removing %s from HFC conf %d because " | |
706 | "two parties require only a PCM slot\n", | |
707 | __func__, nextm->dsp->name, | |
708 | nextm->dsp->hfc_conf); | |
709 | dsp_cmx_hw_message(nextm->dsp, | |
710 | MISDN_CTRL_HFC_CONF_SPLIT, 0, 0, 0, 0); | |
711 | nextm->dsp->hfc_conf = -1; | |
712 | } | |
713 | /* if members have two banks (and not on the same chip) */ | |
714 | if (member->dsp->features.pcm_banks > 1 && | |
715 | nextm->dsp->features.pcm_banks > 1 && | |
716 | member->dsp->features.hfc_id != | |
717 | nextm->dsp->features.hfc_id) { | |
718 | /* if both members have same slots with crossed banks */ | |
719 | if (member->dsp->pcm_slot_tx >= 0 && | |
720 | member->dsp->pcm_slot_rx >= 0 && | |
721 | nextm->dsp->pcm_slot_tx >= 0 && | |
722 | nextm->dsp->pcm_slot_rx >= 0 && | |
723 | nextm->dsp->pcm_slot_tx == | |
724 | member->dsp->pcm_slot_rx && | |
725 | nextm->dsp->pcm_slot_rx == | |
726 | member->dsp->pcm_slot_tx && | |
727 | nextm->dsp->pcm_slot_tx == | |
728 | member->dsp->pcm_slot_tx && | |
729 | member->dsp->pcm_bank_tx != | |
730 | member->dsp->pcm_bank_rx && | |
731 | nextm->dsp->pcm_bank_tx != | |
732 | nextm->dsp->pcm_bank_rx) { | |
733 | /* all members have same slot */ | |
734 | if (dsp_debug & DEBUG_DSP_CMX) | |
735 | printk(KERN_DEBUG | |
736 | "%s dsp %s & %s stay joined on " | |
737 | "PCM slot %d bank %d (TX) bank %d " | |
738 | "(RX) (on different chips)\n", | |
739 | __func__, | |
740 | member->dsp->name, | |
741 | nextm->dsp->name, | |
742 | member->dsp->pcm_slot_tx, | |
743 | member->dsp->pcm_bank_tx, | |
744 | member->dsp->pcm_bank_rx); | |
745 | conf->hardware = 0; | |
746 | conf->software = 1; | |
747 | return; | |
748 | } | |
749 | /* find a new slot */ | |
750 | memset(freeslots, 1, sizeof(freeslots)); | |
751 | list_for_each_entry(dsp, &dsp_ilist, list) { | |
752 | if (dsp != member->dsp && | |
753 | dsp != nextm->dsp && | |
754 | member->dsp->features.pcm_id == | |
755 | dsp->features.pcm_id) { | |
756 | if (dsp->pcm_slot_rx >= 0 && | |
757 | dsp->pcm_slot_rx < | |
758 | sizeof(freeslots)) | |
83a8a55b | 759 | freeslots[dsp->pcm_slot_rx] = 0; |
960366cf KK |
760 | if (dsp->pcm_slot_tx >= 0 && |
761 | dsp->pcm_slot_tx < | |
762 | sizeof(freeslots)) | |
83a8a55b | 763 | freeslots[dsp->pcm_slot_tx] = 0; |
960366cf KK |
764 | } |
765 | } | |
766 | i = 0; | |
767 | ii = member->dsp->features.pcm_slots; | |
768 | while (i < ii) { | |
769 | if (freeslots[i]) | |
770 | break; | |
771 | i++; | |
772 | } | |
773 | if (i == ii) { | |
774 | if (dsp_debug & DEBUG_DSP_CMX) | |
775 | printk(KERN_DEBUG | |
776 | "%s no slot available for " | |
777 | "%s & %s\n", __func__, | |
778 | member->dsp->name, | |
779 | nextm->dsp->name); | |
780 | /* no more slots available */ | |
781 | goto conf_software; | |
782 | } | |
783 | /* assign free slot */ | |
784 | member->dsp->pcm_slot_tx = i; | |
785 | member->dsp->pcm_slot_rx = i; | |
786 | nextm->dsp->pcm_slot_tx = i; | |
787 | nextm->dsp->pcm_slot_rx = i; | |
788 | member->dsp->pcm_bank_rx = 0; | |
789 | member->dsp->pcm_bank_tx = 1; | |
790 | nextm->dsp->pcm_bank_rx = 1; | |
791 | nextm->dsp->pcm_bank_tx = 0; | |
792 | if (dsp_debug & DEBUG_DSP_CMX) | |
793 | printk(KERN_DEBUG | |
794 | "%s adding %s & %s to new PCM slot %d " | |
795 | "(TX and RX on different chips) because " | |
796 | "both members have not same slots\n", | |
797 | __func__, | |
798 | member->dsp->name, | |
799 | nextm->dsp->name, | |
800 | member->dsp->pcm_slot_tx); | |
801 | dsp_cmx_hw_message(member->dsp, MISDN_CTRL_HFC_PCM_CONN, | |
802 | member->dsp->pcm_slot_tx, member->dsp->pcm_bank_tx, | |
803 | member->dsp->pcm_slot_rx, member->dsp->pcm_bank_rx); | |
804 | dsp_cmx_hw_message(nextm->dsp, MISDN_CTRL_HFC_PCM_CONN, | |
805 | nextm->dsp->pcm_slot_tx, nextm->dsp->pcm_bank_tx, | |
806 | nextm->dsp->pcm_slot_rx, nextm->dsp->pcm_bank_rx); | |
807 | conf->hardware = 1; | |
bc138ec4 | 808 | conf->software = tx_data; |
960366cf KK |
809 | return; |
810 | /* if members have one bank (or on the same chip) */ | |
811 | } else { | |
812 | /* if both members have different crossed slots */ | |
813 | if (member->dsp->pcm_slot_tx >= 0 && | |
814 | member->dsp->pcm_slot_rx >= 0 && | |
815 | nextm->dsp->pcm_slot_tx >= 0 && | |
816 | nextm->dsp->pcm_slot_rx >= 0 && | |
817 | nextm->dsp->pcm_slot_tx == | |
818 | member->dsp->pcm_slot_rx && | |
819 | nextm->dsp->pcm_slot_rx == | |
820 | member->dsp->pcm_slot_tx && | |
821 | member->dsp->pcm_slot_tx != | |
822 | member->dsp->pcm_slot_rx && | |
823 | member->dsp->pcm_bank_tx == 0 && | |
824 | member->dsp->pcm_bank_rx == 0 && | |
825 | nextm->dsp->pcm_bank_tx == 0 && | |
826 | nextm->dsp->pcm_bank_rx == 0) { | |
827 | /* all members have same slot */ | |
828 | if (dsp_debug & DEBUG_DSP_CMX) | |
829 | printk(KERN_DEBUG | |
830 | "%s dsp %s & %s stay joined on PCM " | |
831 | "slot %d (TX) %d (RX) on same chip " | |
832 | "or one bank PCM)\n", __func__, | |
833 | member->dsp->name, | |
834 | nextm->dsp->name, | |
835 | member->dsp->pcm_slot_tx, | |
836 | member->dsp->pcm_slot_rx); | |
837 | conf->hardware = 0; | |
838 | conf->software = 1; | |
839 | return; | |
840 | } | |
841 | /* find two new slot */ | |
842 | memset(freeslots, 1, sizeof(freeslots)); | |
843 | list_for_each_entry(dsp, &dsp_ilist, list) { | |
844 | if (dsp != member->dsp && | |
845 | dsp != nextm->dsp && | |
846 | member->dsp->features.pcm_id == | |
847 | dsp->features.pcm_id) { | |
848 | if (dsp->pcm_slot_rx >= 0 && | |
849 | dsp->pcm_slot_rx < | |
850 | sizeof(freeslots)) | |
83a8a55b | 851 | freeslots[dsp->pcm_slot_rx] = 0; |
960366cf KK |
852 | if (dsp->pcm_slot_tx >= 0 && |
853 | dsp->pcm_slot_tx < | |
854 | sizeof(freeslots)) | |
83a8a55b | 855 | freeslots[dsp->pcm_slot_tx] = 0; |
960366cf KK |
856 | } |
857 | } | |
858 | i1 = 0; | |
859 | ii = member->dsp->features.pcm_slots; | |
860 | while (i1 < ii) { | |
861 | if (freeslots[i1]) | |
862 | break; | |
863 | i1++; | |
864 | } | |
865 | if (i1 == ii) { | |
866 | if (dsp_debug & DEBUG_DSP_CMX) | |
867 | printk(KERN_DEBUG | |
868 | "%s no slot available " | |
869 | "for %s & %s\n", __func__, | |
870 | member->dsp->name, | |
871 | nextm->dsp->name); | |
872 | /* no more slots available */ | |
873 | goto conf_software; | |
874 | } | |
875 | i2 = i1+1; | |
876 | while (i2 < ii) { | |
877 | if (freeslots[i2]) | |
878 | break; | |
879 | i2++; | |
880 | } | |
881 | if (i2 == ii) { | |
882 | if (dsp_debug & DEBUG_DSP_CMX) | |
883 | printk(KERN_DEBUG | |
884 | "%s no slot available " | |
885 | "for %s & %s\n", | |
886 | __func__, | |
887 | member->dsp->name, | |
888 | nextm->dsp->name); | |
889 | /* no more slots available */ | |
890 | goto conf_software; | |
891 | } | |
892 | /* assign free slots */ | |
893 | member->dsp->pcm_slot_tx = i1; | |
894 | member->dsp->pcm_slot_rx = i2; | |
895 | nextm->dsp->pcm_slot_tx = i2; | |
896 | nextm->dsp->pcm_slot_rx = i1; | |
897 | member->dsp->pcm_bank_rx = 0; | |
898 | member->dsp->pcm_bank_tx = 0; | |
899 | nextm->dsp->pcm_bank_rx = 0; | |
900 | nextm->dsp->pcm_bank_tx = 0; | |
901 | if (dsp_debug & DEBUG_DSP_CMX) | |
902 | printk(KERN_DEBUG | |
903 | "%s adding %s & %s to new PCM slot %d " | |
904 | "(TX) %d (RX) on same chip or one bank " | |
905 | "PCM, because both members have not " | |
906 | "crossed slots\n", __func__, | |
907 | member->dsp->name, | |
908 | nextm->dsp->name, | |
909 | member->dsp->pcm_slot_tx, | |
910 | member->dsp->pcm_slot_rx); | |
911 | dsp_cmx_hw_message(member->dsp, MISDN_CTRL_HFC_PCM_CONN, | |
912 | member->dsp->pcm_slot_tx, member->dsp->pcm_bank_tx, | |
913 | member->dsp->pcm_slot_rx, member->dsp->pcm_bank_rx); | |
914 | dsp_cmx_hw_message(nextm->dsp, MISDN_CTRL_HFC_PCM_CONN, | |
915 | nextm->dsp->pcm_slot_tx, nextm->dsp->pcm_bank_tx, | |
916 | nextm->dsp->pcm_slot_rx, nextm->dsp->pcm_bank_rx); | |
917 | conf->hardware = 1; | |
bc138ec4 | 918 | conf->software = tx_data; |
960366cf KK |
919 | return; |
920 | } | |
921 | } | |
922 | ||
923 | /* | |
924 | * if we have more than two, we may check if we have a conference | |
925 | * unit available on the chip. also all members must be on the same | |
926 | */ | |
927 | ||
928 | /* if not the same HFC chip */ | |
929 | if (same_hfc < 0) { | |
930 | if (dsp_debug & DEBUG_DSP_CMX) | |
931 | printk(KERN_DEBUG | |
932 | "%s conference %d cannot be formed, because " | |
933 | "members are on different chips or not " | |
934 | "on HFC chip\n", | |
935 | __func__, conf->id); | |
936 | goto conf_software; | |
937 | } | |
938 | ||
939 | /* for more than two members.. */ | |
940 | ||
960366cf KK |
941 | /* if all members already have the same conference */ |
942 | if (all_conf) | |
943 | return; | |
944 | ||
945 | /* | |
946 | * if there is an existing conference, but not all members have joined | |
947 | */ | |
948 | if (current_conf >= 0) { | |
949 | join_members: | |
950 | list_for_each_entry(member, &conf->mlist, list) { | |
db9bb63a KK |
951 | /* if no conference engine on our chip, change to |
952 | * software */ | |
953 | if (!member->dsp->features.hfc_conf) | |
954 | goto conf_software; | |
c6a2e587 AE |
955 | /* in case of hdlc, change to software */ |
956 | if (member->dsp->hdlc) | |
957 | goto conf_software; | |
960366cf KK |
958 | /* join to current conference */ |
959 | if (member->dsp->hfc_conf == current_conf) | |
960 | continue; | |
961 | /* get a free timeslot first */ | |
962 | memset(freeslots, 1, sizeof(freeslots)); | |
963 | list_for_each_entry(dsp, &dsp_ilist, list) { | |
964 | /* | |
965 | * not checking current member, because | |
966 | * slot will be overwritten. | |
967 | */ | |
968 | if ( | |
969 | dsp != member->dsp && | |
970 | /* dsp must be on the same PCM */ | |
971 | member->dsp->features.pcm_id == | |
972 | dsp->features.pcm_id) { | |
973 | /* dsp must be on a slot */ | |
974 | if (dsp->pcm_slot_tx >= 0 && | |
975 | dsp->pcm_slot_tx < | |
976 | sizeof(freeslots)) | |
977 | freeslots[dsp->pcm_slot_tx] = 0; | |
978 | if (dsp->pcm_slot_rx >= 0 && | |
979 | dsp->pcm_slot_rx < | |
980 | sizeof(freeslots)) | |
981 | freeslots[dsp->pcm_slot_rx] = 0; | |
982 | } | |
983 | } | |
984 | i = 0; | |
985 | ii = member->dsp->features.pcm_slots; | |
986 | while (i < ii) { | |
987 | if (freeslots[i]) | |
988 | break; | |
989 | i++; | |
990 | } | |
991 | if (i == ii) { | |
992 | /* no more slots available */ | |
993 | if (dsp_debug & DEBUG_DSP_CMX) | |
994 | printk(KERN_DEBUG | |
995 | "%s conference %d cannot be formed," | |
996 | " because no slot free\n", | |
997 | __func__, conf->id); | |
998 | goto conf_software; | |
999 | } | |
1000 | if (dsp_debug & DEBUG_DSP_CMX) | |
1001 | printk(KERN_DEBUG | |
1002 | "%s changing dsp %s to HW conference " | |
1003 | "%d slot %d\n", __func__, | |
1004 | member->dsp->name, current_conf, i); | |
1005 | /* assign free slot & set PCM & join conf */ | |
1006 | member->dsp->pcm_slot_tx = i; | |
1007 | member->dsp->pcm_slot_rx = i; | |
1008 | member->dsp->pcm_bank_tx = 2; /* loop */ | |
1009 | member->dsp->pcm_bank_rx = 2; | |
1010 | member->dsp->hfc_conf = current_conf; | |
1011 | dsp_cmx_hw_message(member->dsp, MISDN_CTRL_HFC_PCM_CONN, | |
1012 | i, 2, i, 2); | |
1013 | dsp_cmx_hw_message(member->dsp, | |
1014 | MISDN_CTRL_HFC_CONF_JOIN, current_conf, 0, 0, 0); | |
1015 | } | |
1016 | return; | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * no member is in a conference yet, so we find a free one | |
1021 | */ | |
1022 | memset(freeunits, 1, sizeof(freeunits)); | |
1023 | list_for_each_entry(dsp, &dsp_ilist, list) { | |
1024 | /* dsp must be on the same chip */ | |
1025 | if (dsp->features.hfc_id == same_hfc && | |
1026 | /* dsp must have joined a HW conference */ | |
1027 | dsp->hfc_conf >= 0 && | |
1028 | /* slot must be within range */ | |
1029 | dsp->hfc_conf < 8) | |
1030 | freeunits[dsp->hfc_conf] = 0; | |
1031 | } | |
1032 | i = 0; | |
1033 | ii = 8; | |
1034 | while (i < ii) { | |
1035 | if (freeunits[i]) | |
1036 | break; | |
1037 | i++; | |
1038 | } | |
1039 | if (i == ii) { | |
1040 | /* no more conferences available */ | |
1041 | if (dsp_debug & DEBUG_DSP_CMX) | |
1042 | printk(KERN_DEBUG | |
1043 | "%s conference %d cannot be formed, because " | |
1044 | "no conference number free\n", | |
1045 | __func__, conf->id); | |
1046 | goto conf_software; | |
1047 | } | |
1048 | /* join all members */ | |
1049 | current_conf = i; | |
1050 | goto join_members; | |
1051 | } | |
1052 | ||
1053 | ||
1054 | /* | |
1055 | * conf_id != 0: join or change conference | |
1056 | * conf_id == 0: split from conference if not already | |
1057 | */ | |
1058 | int | |
1059 | dsp_cmx_conf(struct dsp *dsp, u32 conf_id) | |
1060 | { | |
1061 | int err; | |
1062 | struct dsp_conf *conf; | |
1063 | struct dsp_conf_member *member; | |
1064 | ||
1065 | /* if conference doesn't change */ | |
1066 | if (dsp->conf_id == conf_id) | |
1067 | return 0; | |
1068 | ||
1069 | /* first remove us from current conf */ | |
1070 | if (dsp->conf_id) { | |
1071 | if (dsp_debug & DEBUG_DSP_CMX) | |
1072 | printk(KERN_DEBUG "removing us from conference %d\n", | |
1073 | dsp->conf->id); | |
1074 | /* remove us from conf */ | |
1075 | conf = dsp->conf; | |
1076 | err = dsp_cmx_del_conf_member(dsp); | |
1077 | if (err) | |
1078 | return err; | |
1079 | dsp->conf_id = 0; | |
1080 | ||
1081 | /* update hardware */ | |
1082 | dsp_cmx_hardware(NULL, dsp); | |
1083 | ||
1084 | /* conf now empty? */ | |
1085 | if (list_empty(&conf->mlist)) { | |
1086 | if (dsp_debug & DEBUG_DSP_CMX) | |
1087 | printk(KERN_DEBUG | |
1088 | "conference is empty, so we remove it.\n"); | |
1089 | err = dsp_cmx_del_conf(conf); | |
1090 | if (err) | |
1091 | return err; | |
1092 | } else { | |
1093 | /* update members left on conf */ | |
1094 | dsp_cmx_hardware(conf, NULL); | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | /* if split */ | |
1099 | if (!conf_id) | |
1100 | return 0; | |
1101 | ||
1102 | /* now add us to conf */ | |
1103 | if (dsp_debug & DEBUG_DSP_CMX) | |
1104 | printk(KERN_DEBUG "searching conference %d\n", | |
1105 | conf_id); | |
1106 | conf = dsp_cmx_search_conf(conf_id); | |
1107 | if (!conf) { | |
1108 | if (dsp_debug & DEBUG_DSP_CMX) | |
1109 | printk(KERN_DEBUG | |
1110 | "conference doesn't exist yet, creating.\n"); | |
1111 | /* the conference doesn't exist, so we create */ | |
1112 | conf = dsp_cmx_new_conf(conf_id); | |
1113 | if (!conf) | |
1114 | return -EINVAL; | |
1115 | } else if (!list_empty(&conf->mlist)) { | |
1116 | member = list_entry(conf->mlist.next, struct dsp_conf_member, | |
1117 | list); | |
1118 | if (dsp->hdlc && !member->dsp->hdlc) { | |
1119 | if (dsp_debug & DEBUG_DSP_CMX) | |
1120 | printk(KERN_DEBUG | |
1121 | "cannot join transparent conference.\n"); | |
1122 | return -EINVAL; | |
1123 | } | |
1124 | if (!dsp->hdlc && member->dsp->hdlc) { | |
1125 | if (dsp_debug & DEBUG_DSP_CMX) | |
1126 | printk(KERN_DEBUG | |
1127 | "cannot join hdlc conference.\n"); | |
1128 | return -EINVAL; | |
1129 | } | |
1130 | } | |
1131 | /* add conference member */ | |
1132 | err = dsp_cmx_add_conf_member(dsp, conf); | |
1133 | if (err) | |
1134 | return err; | |
1135 | dsp->conf_id = conf_id; | |
1136 | ||
1137 | /* if we are alone, we do nothing! */ | |
1138 | if (list_empty(&conf->mlist)) { | |
1139 | if (dsp_debug & DEBUG_DSP_CMX) | |
1140 | printk(KERN_DEBUG | |
1141 | "we are alone in this conference, so exit.\n"); | |
1142 | /* update hardware */ | |
1143 | dsp_cmx_hardware(NULL, dsp); | |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | /* update members on conf */ | |
1148 | dsp_cmx_hardware(conf, NULL); | |
1149 | ||
1150 | return 0; | |
1151 | } | |
1152 | ||
87c5fa1b AE |
1153 | #ifdef CMX_DELAY_DEBUG |
1154 | int delaycount; | |
1155 | static void | |
1156 | showdelay(struct dsp *dsp, int samples, int delay) | |
1157 | { | |
1158 | char bar[] = "--------------------------------------------------|"; | |
1159 | int sdelay; | |
1160 | ||
1161 | delaycount += samples; | |
1162 | if (delaycount < 8000) | |
1163 | return; | |
1164 | delaycount = 0; | |
1165 | ||
1166 | sdelay = delay * 50 / (dsp_poll << 2); | |
1167 | ||
1168 | printk(KERN_DEBUG "DELAY (%s) %3d >%s\n", dsp->name, delay, | |
1169 | sdelay > 50 ? "..." : bar + 50 - sdelay); | |
1170 | } | |
1171 | #endif | |
960366cf KK |
1172 | |
1173 | /* | |
1174 | * audio data is received from card | |
1175 | */ | |
1176 | void | |
1177 | dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb) | |
1178 | { | |
1179 | u8 *d, *p; | |
1180 | int len = skb->len; | |
1181 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
1182 | int w, i, ii; | |
1183 | ||
1184 | /* check if we have sompen */ | |
1185 | if (len < 1) | |
1186 | return; | |
1187 | ||
1188 | /* half of the buffer should be larger than maximum packet size */ | |
1189 | if (len >= CMX_BUFF_HALF) { | |
1190 | printk(KERN_ERR | |
1191 | "%s line %d: packet from card is too large (%d bytes). " | |
1192 | "please make card send smaller packets OR increase " | |
1193 | "CMX_BUFF_SIZE\n", __FILE__, __LINE__, len); | |
1194 | return; | |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | * initialize pointers if not already - | |
1199 | * also add delay if requested by PH_SIGNAL | |
1200 | */ | |
1201 | if (dsp->rx_init) { | |
1202 | dsp->rx_init = 0; | |
1203 | if (dsp->features.unordered) { | |
1204 | dsp->rx_R = (hh->id & CMX_BUFF_MASK); | |
8dd2f36f AE |
1205 | if (dsp->cmx_delay) |
1206 | dsp->rx_W = (dsp->rx_R + dsp->cmx_delay) | |
1207 | & CMX_BUFF_MASK; | |
1208 | else | |
1209 | dsp->rx_W = (dsp->rx_R + (dsp_poll >> 1)) | |
1210 | & CMX_BUFF_MASK; | |
960366cf KK |
1211 | } else { |
1212 | dsp->rx_R = 0; | |
8dd2f36f AE |
1213 | if (dsp->cmx_delay) |
1214 | dsp->rx_W = dsp->cmx_delay; | |
1215 | else | |
1216 | dsp->rx_W = dsp_poll >> 1; | |
960366cf KK |
1217 | } |
1218 | } | |
1219 | /* if frame contains time code, write directly */ | |
1220 | if (dsp->features.unordered) { | |
1221 | dsp->rx_W = (hh->id & CMX_BUFF_MASK); | |
1222 | /* printk(KERN_DEBUG "%s %08x\n", dsp->name, hh->id); */ | |
1223 | } | |
1224 | /* | |
1225 | * if we underrun (or maybe overrun), | |
1226 | * we set our new read pointer, and write silence to buffer | |
1227 | */ | |
1228 | if (((dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK) >= CMX_BUFF_HALF) { | |
190f71d9 | 1229 | if (dsp_debug & DEBUG_DSP_CLOCK) |
960366cf KK |
1230 | printk(KERN_DEBUG |
1231 | "cmx_receive(dsp=%lx): UNDERRUN (or overrun the " | |
1232 | "maximum delay), adjusting read pointer! " | |
1233 | "(inst %s)\n", (u_long)dsp, dsp->name); | |
8dd2f36f | 1234 | /* flush rx buffer and set delay to dsp_poll / 2 */ |
960366cf KK |
1235 | if (dsp->features.unordered) { |
1236 | dsp->rx_R = (hh->id & CMX_BUFF_MASK); | |
8dd2f36f AE |
1237 | if (dsp->cmx_delay) |
1238 | dsp->rx_W = (dsp->rx_R + dsp->cmx_delay) | |
1239 | & CMX_BUFF_MASK; | |
f7df0b8d | 1240 | else |
8dd2f36f AE |
1241 | dsp->rx_W = (dsp->rx_R + (dsp_poll >> 1)) |
1242 | & CMX_BUFF_MASK; | |
960366cf KK |
1243 | } else { |
1244 | dsp->rx_R = 0; | |
8dd2f36f AE |
1245 | if (dsp->cmx_delay) |
1246 | dsp->rx_W = dsp->cmx_delay; | |
1247 | else | |
1248 | dsp->rx_W = dsp_poll >> 1; | |
960366cf KK |
1249 | } |
1250 | memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff)); | |
1251 | } | |
1252 | /* if we have reached double delay, jump back to middle */ | |
1253 | if (dsp->cmx_delay) | |
1254 | if (((dsp->rx_W - dsp->rx_R) & CMX_BUFF_MASK) >= | |
1255 | (dsp->cmx_delay << 1)) { | |
190f71d9 | 1256 | if (dsp_debug & DEBUG_DSP_CLOCK) |
960366cf KK |
1257 | printk(KERN_DEBUG |
1258 | "cmx_receive(dsp=%lx): OVERRUN (because " | |
1259 | "twice the delay is reached), adjusting " | |
1260 | "read pointer! (inst %s)\n", | |
1261 | (u_long)dsp, dsp->name); | |
1262 | /* flush buffer */ | |
1263 | if (dsp->features.unordered) { | |
1264 | dsp->rx_R = (hh->id & CMX_BUFF_MASK); | |
1265 | dsp->rx_W = (dsp->rx_R + dsp->cmx_delay) | |
1266 | & CMX_BUFF_MASK; | |
1267 | } else { | |
1268 | dsp->rx_R = 0; | |
1269 | dsp->rx_W = dsp->cmx_delay; | |
1270 | } | |
1271 | memset(dsp->rx_buff, dsp_silence, sizeof(dsp->rx_buff)); | |
1272 | } | |
1273 | ||
1274 | /* show where to write */ | |
1275 | #ifdef CMX_DEBUG | |
1276 | printk(KERN_DEBUG | |
1277 | "cmx_receive(dsp=%lx): rx_R(dsp)=%05x rx_W(dsp)=%05x len=%d %s\n", | |
1278 | (u_long)dsp, dsp->rx_R, dsp->rx_W, len, dsp->name); | |
1279 | #endif | |
1280 | ||
1281 | /* write data into rx_buffer */ | |
1282 | p = skb->data; | |
1283 | d = dsp->rx_buff; | |
1284 | w = dsp->rx_W; | |
1285 | i = 0; | |
1286 | ii = len; | |
1287 | while (i < ii) { | |
1288 | d[w++ & CMX_BUFF_MASK] = *p++; | |
1289 | i++; | |
1290 | } | |
1291 | ||
1292 | /* increase write-pointer */ | |
1293 | dsp->rx_W = ((dsp->rx_W+len) & CMX_BUFF_MASK); | |
87c5fa1b AE |
1294 | #ifdef CMX_DELAY_DEBUG |
1295 | showdelay(dsp, len, (dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK); | |
1296 | #endif | |
960366cf KK |
1297 | } |
1298 | ||
1299 | ||
1300 | /* | |
1301 | * send (mixed) audio data to card and control jitter | |
1302 | */ | |
1303 | static void | |
1304 | dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members) | |
1305 | { | |
1306 | struct dsp_conf *conf = dsp->conf; | |
1307 | struct dsp *member, *other; | |
1308 | register s32 sample; | |
1309 | u8 *d, *p, *q, *o_q; | |
1310 | struct sk_buff *nskb, *txskb; | |
1311 | int r, rr, t, tt, o_r, o_rr; | |
1312 | int preload = 0; | |
1313 | struct mISDNhead *hh, *thh; | |
bc138ec4 | 1314 | int tx_data_only = 0; |
960366cf KK |
1315 | |
1316 | /* don't process if: */ | |
1317 | if (!dsp->b_active) { /* if not active */ | |
1318 | dsp->last_tx = 0; | |
1319 | return; | |
1320 | } | |
bc138ec4 AE |
1321 | if (((dsp->conf && dsp->conf->hardware) || /* hardware conf */ |
1322 | dsp->echo.hardware) && /* OR hardware echo */ | |
960366cf KK |
1323 | dsp->tx_R == dsp->tx_W && /* AND no tx-data */ |
1324 | !(dsp->tone.tone && dsp->tone.software)) { /* AND not soft tones */ | |
bc138ec4 AE |
1325 | if (!dsp->tx_data) { /* no tx_data for user space required */ |
1326 | dsp->last_tx = 0; | |
1327 | return; | |
1328 | } | |
1329 | if (dsp->conf && dsp->conf->software && dsp->conf->hardware) | |
1330 | tx_data_only = 1; | |
1331 | if (dsp->conf->software && dsp->echo.hardware) | |
1332 | tx_data_only = 1; | |
960366cf KK |
1333 | } |
1334 | ||
1335 | #ifdef CMX_DEBUG | |
1336 | printk(KERN_DEBUG | |
1337 | "SEND members=%d dsp=%s, conf=%p, rx_R=%05x rx_W=%05x\n", | |
1338 | members, dsp->name, conf, dsp->rx_R, dsp->rx_W); | |
1339 | #endif | |
1340 | ||
1341 | /* preload if we have delay set */ | |
1342 | if (dsp->cmx_delay && !dsp->last_tx) { | |
1343 | preload = len; | |
1344 | if (preload < 128) | |
1345 | preload = 128; | |
1346 | } | |
1347 | ||
1348 | /* PREPARE RESULT */ | |
1349 | nskb = mI_alloc_skb(len + preload, GFP_ATOMIC); | |
1350 | if (!nskb) { | |
1351 | printk(KERN_ERR | |
1352 | "FATAL ERROR in mISDN_dsp.o: cannot alloc %d bytes\n", | |
1353 | len + preload); | |
1354 | return; | |
1355 | } | |
1356 | hh = mISDN_HEAD_P(nskb); | |
1357 | hh->prim = PH_DATA_REQ; | |
1358 | hh->id = 0; | |
1359 | dsp->last_tx = 1; | |
1360 | ||
1361 | /* set pointers, indexes and stuff */ | |
1362 | member = dsp; | |
1363 | p = dsp->tx_buff; /* transmit data */ | |
1364 | q = dsp->rx_buff; /* received data */ | |
1365 | d = skb_put(nskb, preload + len); /* result */ | |
1366 | t = dsp->tx_R; /* tx-pointers */ | |
1367 | tt = dsp->tx_W; | |
1368 | r = dsp->rx_R; /* rx-pointers */ | |
1369 | rr = (r + len) & CMX_BUFF_MASK; | |
1370 | ||
1371 | /* preload with silence, if required */ | |
1372 | if (preload) { | |
1373 | memset(d, dsp_silence, preload); | |
1374 | d += preload; | |
1375 | } | |
1376 | ||
1377 | /* PROCESS TONES/TX-DATA ONLY */ | |
1378 | if (dsp->tone.tone && dsp->tone.software) { | |
1379 | /* -> copy tone */ | |
1380 | dsp_tone_copy(dsp, d, len); | |
1381 | dsp->tx_R = 0; /* clear tx buffer */ | |
1382 | dsp->tx_W = 0; | |
1383 | goto send_packet; | |
1384 | } | |
1385 | /* if we have tx-data but do not use mixing */ | |
1386 | if (!dsp->tx_mix && t != tt) { | |
1387 | /* -> send tx-data and continue when not enough */ | |
1388 | #ifdef CMX_TX_DEBUG | |
1389 | sprintf(debugbuf, "TX sending (%04x-%04x)%p: ", t, tt, p); | |
1390 | #endif | |
1391 | while (r != rr && t != tt) { | |
1392 | #ifdef CMX_TX_DEBUG | |
1393 | if (strlen(debugbuf) < 48) | |
eac74af9 KK |
1394 | sprintf(debugbuf+strlen(debugbuf), " %02x", |
1395 | p[t]); | |
960366cf KK |
1396 | #endif |
1397 | *d++ = p[t]; /* write tx_buff */ | |
1398 | t = (t+1) & CMX_BUFF_MASK; | |
1399 | r = (r+1) & CMX_BUFF_MASK; | |
1400 | } | |
1401 | if (r == rr) { | |
1402 | dsp->tx_R = t; | |
1403 | #ifdef CMX_TX_DEBUG | |
1404 | printk(KERN_DEBUG "%s\n", debugbuf); | |
1405 | #endif | |
1406 | goto send_packet; | |
1407 | } | |
1408 | } | |
1409 | #ifdef CMX_TX_DEBUG | |
1410 | printk(KERN_DEBUG "%s\n", debugbuf); | |
1411 | #endif | |
1412 | ||
1413 | /* PROCESS DATA (one member / no conf) */ | |
1414 | if (!conf || members <= 1) { | |
1415 | /* -> if echo is NOT enabled */ | |
bc138ec4 | 1416 | if (!dsp->echo.software) { |
960366cf KK |
1417 | /* -> send tx-data if available or use 0-volume */ |
1418 | while (r != rr && t != tt) { | |
1419 | *d++ = p[t]; /* write tx_buff */ | |
1420 | t = (t+1) & CMX_BUFF_MASK; | |
1421 | r = (r+1) & CMX_BUFF_MASK; | |
1422 | } | |
8dd2f36f | 1423 | if (r != rr) { |
190f71d9 AE |
1424 | if (dsp_debug & DEBUG_DSP_CLOCK) |
1425 | printk(KERN_DEBUG "%s: RX empty\n", | |
1426 | __func__); | |
960366cf | 1427 | memset(d, dsp_silence, (rr-r)&CMX_BUFF_MASK); |
8dd2f36f | 1428 | } |
960366cf KK |
1429 | /* -> if echo is enabled */ |
1430 | } else { | |
1431 | /* | |
1432 | * -> mix tx-data with echo if available, | |
1433 | * or use echo only | |
1434 | */ | |
1435 | while (r != rr && t != tt) { | |
1436 | *d++ = dsp_audio_mix_law[(p[t]<<8)|q[r]]; | |
1437 | t = (t+1) & CMX_BUFF_MASK; | |
1438 | r = (r+1) & CMX_BUFF_MASK; | |
1439 | } | |
1440 | while (r != rr) { | |
1441 | *d++ = q[r]; /* echo */ | |
1442 | r = (r+1) & CMX_BUFF_MASK; | |
1443 | } | |
1444 | } | |
1445 | dsp->tx_R = t; | |
1446 | goto send_packet; | |
1447 | } | |
1448 | /* PROCESS DATA (two members) */ | |
1449 | #ifdef CMX_CONF_DEBUG | |
1450 | if (0) { | |
1451 | #else | |
1452 | if (members == 2) { | |
1453 | #endif | |
1454 | /* "other" becomes other party */ | |
1455 | other = (list_entry(conf->mlist.next, | |
1456 | struct dsp_conf_member, list))->dsp; | |
1457 | if (other == member) | |
1458 | other = (list_entry(conf->mlist.prev, | |
1459 | struct dsp_conf_member, list))->dsp; | |
1460 | o_q = other->rx_buff; /* received data */ | |
1461 | o_rr = (other->rx_R + len) & CMX_BUFF_MASK; | |
1462 | /* end of rx-pointer */ | |
1463 | o_r = (o_rr - rr + r) & CMX_BUFF_MASK; | |
1464 | /* start rx-pointer at current read position*/ | |
1465 | /* -> if echo is NOT enabled */ | |
bc138ec4 | 1466 | if (!dsp->echo.software) { |
960366cf KK |
1467 | /* |
1468 | * -> copy other member's rx-data, | |
1469 | * if tx-data is available, mix | |
1470 | */ | |
1471 | while (o_r != o_rr && t != tt) { | |
1472 | *d++ = dsp_audio_mix_law[(p[t]<<8)|o_q[o_r]]; | |
1473 | t = (t+1) & CMX_BUFF_MASK; | |
1474 | o_r = (o_r+1) & CMX_BUFF_MASK; | |
1475 | } | |
1476 | while (o_r != o_rr) { | |
1477 | *d++ = o_q[o_r]; | |
1478 | o_r = (o_r+1) & CMX_BUFF_MASK; | |
1479 | } | |
1480 | /* -> if echo is enabled */ | |
1481 | } else { | |
1482 | /* | |
1483 | * -> mix other member's rx-data with echo, | |
1484 | * if tx-data is available, mix | |
1485 | */ | |
1486 | while (r != rr && t != tt) { | |
1487 | sample = dsp_audio_law_to_s32[p[t]] + | |
1488 | dsp_audio_law_to_s32[q[r]] + | |
1489 | dsp_audio_law_to_s32[o_q[o_r]]; | |
1490 | if (sample < -32768) | |
1491 | sample = -32768; | |
1492 | else if (sample > 32767) | |
1493 | sample = 32767; | |
1494 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1495 | /* tx-data + rx_data + echo */ | |
1496 | t = (t+1) & CMX_BUFF_MASK; | |
1497 | r = (r+1) & CMX_BUFF_MASK; | |
1498 | o_r = (o_r+1) & CMX_BUFF_MASK; | |
1499 | } | |
1500 | while (r != rr) { | |
1501 | *d++ = dsp_audio_mix_law[(q[r]<<8)|o_q[o_r]]; | |
1502 | r = (r+1) & CMX_BUFF_MASK; | |
1503 | o_r = (o_r+1) & CMX_BUFF_MASK; | |
1504 | } | |
1505 | } | |
1506 | dsp->tx_R = t; | |
1507 | goto send_packet; | |
1508 | } | |
1509 | #ifdef DSP_NEVER_DEFINED | |
1510 | } | |
1511 | #endif | |
1512 | /* PROCESS DATA (three or more members) */ | |
1513 | /* -> if echo is NOT enabled */ | |
bc138ec4 | 1514 | if (!dsp->echo.software) { |
960366cf | 1515 | /* |
25985edc | 1516 | * -> subtract rx-data from conf-data, |
960366cf KK |
1517 | * if tx-data is available, mix |
1518 | */ | |
1519 | while (r != rr && t != tt) { | |
1520 | sample = dsp_audio_law_to_s32[p[t]] + *c++ - | |
1521 | dsp_audio_law_to_s32[q[r]]; | |
1522 | if (sample < -32768) | |
1523 | sample = -32768; | |
1524 | else if (sample > 32767) | |
1525 | sample = 32767; | |
1526 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1527 | /* conf-rx+tx */ | |
1528 | r = (r+1) & CMX_BUFF_MASK; | |
1529 | t = (t+1) & CMX_BUFF_MASK; | |
1530 | } | |
1531 | while (r != rr) { | |
1532 | sample = *c++ - dsp_audio_law_to_s32[q[r]]; | |
1533 | if (sample < -32768) | |
1534 | sample = -32768; | |
1535 | else if (sample > 32767) | |
1536 | sample = 32767; | |
1537 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1538 | /* conf-rx */ | |
1539 | r = (r+1) & CMX_BUFF_MASK; | |
1540 | } | |
1541 | /* -> if echo is enabled */ | |
1542 | } else { | |
1543 | /* | |
1544 | * -> encode conf-data, if tx-data | |
1545 | * is available, mix | |
1546 | */ | |
1547 | while (r != rr && t != tt) { | |
1548 | sample = dsp_audio_law_to_s32[p[t]] + *c++; | |
1549 | if (sample < -32768) | |
1550 | sample = -32768; | |
1551 | else if (sample > 32767) | |
1552 | sample = 32767; | |
1553 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1554 | /* conf(echo)+tx */ | |
1555 | t = (t+1) & CMX_BUFF_MASK; | |
1556 | r = (r+1) & CMX_BUFF_MASK; | |
1557 | } | |
1558 | while (r != rr) { | |
1559 | sample = *c++; | |
1560 | if (sample < -32768) | |
1561 | sample = -32768; | |
1562 | else if (sample > 32767) | |
1563 | sample = 32767; | |
1564 | *d++ = dsp_audio_s16_to_law[sample & 0xffff]; | |
1565 | /* conf(echo) */ | |
1566 | r = (r+1) & CMX_BUFF_MASK; | |
1567 | } | |
1568 | } | |
1569 | dsp->tx_R = t; | |
1570 | goto send_packet; | |
1571 | ||
1572 | send_packet: | |
1573 | /* | |
1574 | * send tx-data if enabled - don't filter, | |
25985edc | 1575 | * because we want what we send, not what we filtered |
960366cf KK |
1576 | */ |
1577 | if (dsp->tx_data) { | |
bc138ec4 AE |
1578 | if (tx_data_only) { |
1579 | hh->prim = DL_DATA_REQ; | |
1580 | hh->id = 0; | |
1581 | /* queue and trigger */ | |
1582 | skb_queue_tail(&dsp->sendq, nskb); | |
1583 | schedule_work(&dsp->workq); | |
1584 | /* exit because only tx_data is used */ | |
1585 | return; | |
960366cf | 1586 | } else { |
bc138ec4 AE |
1587 | txskb = mI_alloc_skb(len, GFP_ATOMIC); |
1588 | if (!txskb) { | |
1589 | printk(KERN_ERR | |
1590 | "FATAL ERROR in mISDN_dsp.o: " | |
1591 | "cannot alloc %d bytes\n", len); | |
1592 | } else { | |
1593 | thh = mISDN_HEAD_P(txskb); | |
1594 | thh->prim = DL_DATA_REQ; | |
1595 | thh->id = 0; | |
1596 | memcpy(skb_put(txskb, len), nskb->data+preload, | |
1597 | len); | |
1598 | /* queue (trigger later) */ | |
1599 | skb_queue_tail(&dsp->sendq, txskb); | |
1600 | } | |
960366cf KK |
1601 | } |
1602 | } | |
bc138ec4 AE |
1603 | |
1604 | /* send data only to card, if we don't just calculated tx_data */ | |
960366cf KK |
1605 | /* adjust volume */ |
1606 | if (dsp->tx_volume) | |
1607 | dsp_change_volume(nskb, dsp->tx_volume); | |
1608 | /* pipeline */ | |
1609 | if (dsp->pipeline.inuse) | |
bc138ec4 AE |
1610 | dsp_pipeline_process_tx(&dsp->pipeline, nskb->data, |
1611 | nskb->len); | |
960366cf KK |
1612 | /* crypt */ |
1613 | if (dsp->bf_enable) | |
1614 | dsp_bf_encrypt(dsp, nskb->data, nskb->len); | |
1615 | /* queue and trigger */ | |
1616 | skb_queue_tail(&dsp->sendq, nskb); | |
1617 | schedule_work(&dsp->workq); | |
1618 | } | |
1619 | ||
fae3e7fb | 1620 | static u32 jittercount; /* counter for jitter check */ |
960366cf KK |
1621 | struct timer_list dsp_spl_tl; |
1622 | u32 dsp_spl_jiffies; /* calculate the next time to fire */ | |
3bd69ad1 AE |
1623 | static u16 dsp_count; /* last sample count */ |
1624 | static int dsp_count_valid ; /* if we have last sample count */ | |
960366cf KK |
1625 | |
1626 | void | |
1627 | dsp_cmx_send(void *arg) | |
1628 | { | |
1629 | struct dsp_conf *conf; | |
1630 | struct dsp_conf_member *member; | |
1631 | struct dsp *dsp; | |
1632 | int mustmix, members; | |
44e09589 FS |
1633 | static s32 mixbuffer[MAX_POLL+100]; |
1634 | s32 *c; | |
960366cf KK |
1635 | u8 *p, *q; |
1636 | int r, rr; | |
1637 | int jittercheck = 0, delay, i; | |
1638 | u_long flags; | |
3bd69ad1 | 1639 | u16 length, count; |
960366cf KK |
1640 | |
1641 | /* lock */ | |
1642 | spin_lock_irqsave(&dsp_lock, flags); | |
1643 | ||
3bd69ad1 AE |
1644 | if (!dsp_count_valid) { |
1645 | dsp_count = mISDN_clock_get(); | |
960366cf | 1646 | length = dsp_poll; |
3bd69ad1 | 1647 | dsp_count_valid = 1; |
960366cf | 1648 | } else { |
3bd69ad1 AE |
1649 | count = mISDN_clock_get(); |
1650 | length = count - dsp_count; | |
1651 | dsp_count = count; | |
960366cf KK |
1652 | } |
1653 | if (length > MAX_POLL + 100) | |
1654 | length = MAX_POLL + 100; | |
3bd69ad1 | 1655 | /* printk(KERN_DEBUG "len=%d dsp_count=0x%x\n", length, dsp_count); */ |
960366cf KK |
1656 | |
1657 | /* | |
3bd69ad1 | 1658 | * check if jitter needs to be checked (this is every second) |
960366cf | 1659 | */ |
3bd69ad1 AE |
1660 | jittercount += length; |
1661 | if (jittercount >= 8000) { | |
1662 | jittercount -= 8000; | |
960366cf | 1663 | jittercheck = 1; |
3bd69ad1 | 1664 | } |
960366cf KK |
1665 | |
1666 | /* loop all members that do not require conference mixing */ | |
1667 | list_for_each_entry(dsp, &dsp_ilist, list) { | |
1668 | if (dsp->hdlc) | |
1669 | continue; | |
1670 | conf = dsp->conf; | |
1671 | mustmix = 0; | |
1672 | members = 0; | |
1673 | if (conf) { | |
1674 | members = count_list_member(&conf->mlist); | |
1675 | #ifdef CMX_CONF_DEBUG | |
1676 | if (conf->software && members > 1) | |
1677 | #else | |
1678 | if (conf->software && members > 2) | |
1679 | #endif | |
1680 | mustmix = 1; | |
1681 | } | |
1682 | ||
1683 | /* transmission required */ | |
1684 | if (!mustmix) { | |
1685 | dsp_cmx_send_member(dsp, length, mixbuffer, members); | |
1686 | ||
1687 | /* | |
1688 | * unused mixbuffer is given to prevent a | |
1689 | * potential null-pointer-bug | |
1690 | */ | |
1691 | } | |
1692 | } | |
1693 | ||
1694 | /* loop all members that require conference mixing */ | |
1695 | list_for_each_entry(conf, &conf_ilist, list) { | |
1696 | /* count members and check hardware */ | |
1697 | members = count_list_member(&conf->mlist); | |
1698 | #ifdef CMX_CONF_DEBUG | |
1699 | if (conf->software && members > 1) { | |
1700 | #else | |
1701 | if (conf->software && members > 2) { | |
1702 | #endif | |
1703 | /* check for hdlc conf */ | |
1704 | member = list_entry(conf->mlist.next, | |
1705 | struct dsp_conf_member, list); | |
1706 | if (member->dsp->hdlc) | |
1707 | continue; | |
1708 | /* mix all data */ | |
1709 | memset(mixbuffer, 0, length*sizeof(s32)); | |
1710 | list_for_each_entry(member, &conf->mlist, list) { | |
1711 | dsp = member->dsp; | |
1712 | /* get range of data to mix */ | |
1713 | c = mixbuffer; | |
1714 | q = dsp->rx_buff; | |
1715 | r = dsp->rx_R; | |
1716 | rr = (r + length) & CMX_BUFF_MASK; | |
1717 | /* add member's data */ | |
1718 | while (r != rr) { | |
1719 | *c++ += dsp_audio_law_to_s32[q[r]]; | |
1720 | r = (r+1) & CMX_BUFF_MASK; | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | /* process each member */ | |
1725 | list_for_each_entry(member, &conf->mlist, list) { | |
1726 | /* transmission */ | |
1727 | dsp_cmx_send_member(member->dsp, length, | |
1728 | mixbuffer, members); | |
1729 | } | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | /* delete rx-data, increment buffers, change pointers */ | |
1734 | list_for_each_entry(dsp, &dsp_ilist, list) { | |
1735 | if (dsp->hdlc) | |
1736 | continue; | |
1737 | p = dsp->rx_buff; | |
1738 | q = dsp->tx_buff; | |
1739 | r = dsp->rx_R; | |
1740 | /* move receive pointer when receiving */ | |
1741 | if (!dsp->rx_is_off) { | |
1742 | rr = (r + length) & CMX_BUFF_MASK; | |
1743 | /* delete rx-data */ | |
1744 | while (r != rr) { | |
1745 | p[r] = dsp_silence; | |
1746 | r = (r+1) & CMX_BUFF_MASK; | |
1747 | } | |
1748 | /* increment rx-buffer pointer */ | |
1749 | dsp->rx_R = r; /* write incremented read pointer */ | |
1750 | } | |
1751 | ||
1752 | /* check current rx_delay */ | |
1753 | delay = (dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK; | |
1754 | if (delay >= CMX_BUFF_HALF) | |
1755 | delay = 0; /* will be the delay before next write */ | |
1756 | /* check for lower delay */ | |
1757 | if (delay < dsp->rx_delay[0]) | |
1758 | dsp->rx_delay[0] = delay; | |
1759 | /* check current tx_delay */ | |
1760 | delay = (dsp->tx_W-dsp->tx_R) & CMX_BUFF_MASK; | |
1761 | if (delay >= CMX_BUFF_HALF) | |
1762 | delay = 0; /* will be the delay before next write */ | |
1763 | /* check for lower delay */ | |
1764 | if (delay < dsp->tx_delay[0]) | |
1765 | dsp->tx_delay[0] = delay; | |
1766 | if (jittercheck) { | |
1767 | /* find the lowest of all rx_delays */ | |
1768 | delay = dsp->rx_delay[0]; | |
1769 | i = 1; | |
1770 | while (i < MAX_SECONDS_JITTER_CHECK) { | |
1771 | if (delay > dsp->rx_delay[i]) | |
1772 | delay = dsp->rx_delay[i]; | |
1773 | i++; | |
1774 | } | |
1775 | /* | |
1776 | * remove rx_delay only if we have delay AND we | |
8dd2f36f AE |
1777 | * have not preset cmx_delay AND |
1778 | * the delay is greater dsp_poll | |
960366cf | 1779 | */ |
8dd2f36f | 1780 | if (delay > dsp_poll && !dsp->cmx_delay) { |
190f71d9 | 1781 | if (dsp_debug & DEBUG_DSP_CLOCK) |
960366cf KK |
1782 | printk(KERN_DEBUG |
1783 | "%s lowest rx_delay of %d bytes for" | |
1784 | " dsp %s are now removed.\n", | |
1785 | __func__, delay, | |
1786 | dsp->name); | |
1787 | r = dsp->rx_R; | |
8dd2f36f AE |
1788 | rr = (r + delay - (dsp_poll >> 1)) |
1789 | & CMX_BUFF_MASK; | |
960366cf KK |
1790 | /* delete rx-data */ |
1791 | while (r != rr) { | |
1792 | p[r] = dsp_silence; | |
1793 | r = (r+1) & CMX_BUFF_MASK; | |
1794 | } | |
1795 | /* increment rx-buffer pointer */ | |
1796 | dsp->rx_R = r; | |
1797 | /* write incremented read pointer */ | |
1798 | } | |
1799 | /* find the lowest of all tx_delays */ | |
1800 | delay = dsp->tx_delay[0]; | |
1801 | i = 1; | |
1802 | while (i < MAX_SECONDS_JITTER_CHECK) { | |
1803 | if (delay > dsp->tx_delay[i]) | |
1804 | delay = dsp->tx_delay[i]; | |
1805 | i++; | |
1806 | } | |
1807 | /* | |
1808 | * remove delay only if we have delay AND we | |
1809 | * have enabled tx_dejitter | |
1810 | */ | |
8dd2f36f | 1811 | if (delay > dsp_poll && dsp->tx_dejitter) { |
190f71d9 | 1812 | if (dsp_debug & DEBUG_DSP_CLOCK) |
960366cf KK |
1813 | printk(KERN_DEBUG |
1814 | "%s lowest tx_delay of %d bytes for" | |
1815 | " dsp %s are now removed.\n", | |
1816 | __func__, delay, | |
1817 | dsp->name); | |
1818 | r = dsp->tx_R; | |
8dd2f36f AE |
1819 | rr = (r + delay - (dsp_poll >> 1)) |
1820 | & CMX_BUFF_MASK; | |
960366cf KK |
1821 | /* delete tx-data */ |
1822 | while (r != rr) { | |
1823 | q[r] = dsp_silence; | |
1824 | r = (r+1) & CMX_BUFF_MASK; | |
1825 | } | |
1826 | /* increment rx-buffer pointer */ | |
1827 | dsp->tx_R = r; | |
1828 | /* write incremented read pointer */ | |
1829 | } | |
1830 | /* scroll up delays */ | |
1831 | i = MAX_SECONDS_JITTER_CHECK - 1; | |
1832 | while (i) { | |
1833 | dsp->rx_delay[i] = dsp->rx_delay[i-1]; | |
1834 | dsp->tx_delay[i] = dsp->tx_delay[i-1]; | |
1835 | i--; | |
1836 | } | |
1837 | dsp->tx_delay[0] = CMX_BUFF_HALF; /* (infinite) delay */ | |
1838 | dsp->rx_delay[0] = CMX_BUFF_HALF; /* (infinite) delay */ | |
1839 | } | |
1840 | } | |
1841 | ||
1842 | /* if next event would be in the past ... */ | |
1843 | if ((s32)(dsp_spl_jiffies+dsp_tics-jiffies) <= 0) | |
1844 | dsp_spl_jiffies = jiffies + 1; | |
1845 | else | |
1846 | dsp_spl_jiffies += dsp_tics; | |
1847 | ||
1848 | dsp_spl_tl.expires = dsp_spl_jiffies; | |
1849 | add_timer(&dsp_spl_tl); | |
1850 | ||
1851 | /* unlock */ | |
1852 | spin_unlock_irqrestore(&dsp_lock, flags); | |
1853 | } | |
1854 | ||
1855 | /* | |
1856 | * audio data is transmitted from upper layer to the dsp | |
1857 | */ | |
1858 | void | |
1859 | dsp_cmx_transmit(struct dsp *dsp, struct sk_buff *skb) | |
1860 | { | |
1861 | u_int w, ww; | |
1862 | u8 *d, *p; | |
1863 | int space; /* todo: , l = skb->len; */ | |
1864 | #ifdef CMX_TX_DEBUG | |
1865 | char debugbuf[256] = ""; | |
1866 | #endif | |
1867 | ||
1868 | /* check if there is enough space, and then copy */ | |
1869 | w = dsp->tx_W; | |
1870 | ww = dsp->tx_R; | |
1871 | p = dsp->tx_buff; | |
1872 | d = skb->data; | |
8dd2f36f | 1873 | space = (ww - w - 1) & CMX_BUFF_MASK; |
960366cf | 1874 | /* write-pointer should not overrun nor reach read pointer */ |
8dd2f36f | 1875 | if (space < skb->len) { |
960366cf | 1876 | /* write to the space we have left */ |
8dd2f36f | 1877 | ww = (ww - 1) & CMX_BUFF_MASK; /* end one byte prior tx_R */ |
190f71d9 | 1878 | if (dsp_debug & DEBUG_DSP_CLOCK) |
0aafe75d PS |
1879 | printk(KERN_DEBUG "%s: TX overflow space=%d skb->len=" |
1880 | "%d, w=0x%04x, ww=0x%04x\n", __func__, space, | |
1881 | skb->len, w, ww); | |
8dd2f36f | 1882 | } else |
960366cf KK |
1883 | /* write until all byte are copied */ |
1884 | ww = (w + skb->len) & CMX_BUFF_MASK; | |
1885 | dsp->tx_W = ww; | |
1886 | ||
1887 | /* show current buffer */ | |
1888 | #ifdef CMX_DEBUG | |
1889 | printk(KERN_DEBUG | |
1890 | "cmx_transmit(dsp=%lx) %d bytes to 0x%x-0x%x. %s\n", | |
1891 | (u_long)dsp, (ww-w)&CMX_BUFF_MASK, w, ww, dsp->name); | |
1892 | #endif | |
1893 | ||
1894 | /* copy transmit data to tx-buffer */ | |
1895 | #ifdef CMX_TX_DEBUG | |
1896 | sprintf(debugbuf, "TX getting (%04x-%04x)%p: ", w, ww, p); | |
1897 | #endif | |
1898 | while (w != ww) { | |
1899 | #ifdef CMX_TX_DEBUG | |
1900 | if (strlen(debugbuf) < 48) | |
1901 | sprintf(debugbuf+strlen(debugbuf), " %02x", *d); | |
1902 | #endif | |
1903 | p[w] = *d++; | |
1904 | w = (w+1) & CMX_BUFF_MASK; | |
1905 | } | |
1906 | #ifdef CMX_TX_DEBUG | |
1907 | printk(KERN_DEBUG "%s\n", debugbuf); | |
1908 | #endif | |
1909 | ||
1910 | } | |
1911 | ||
1912 | /* | |
1913 | * hdlc data is received from card and sent to all members. | |
1914 | */ | |
1915 | void | |
1916 | dsp_cmx_hdlc(struct dsp *dsp, struct sk_buff *skb) | |
1917 | { | |
1918 | struct sk_buff *nskb = NULL; | |
1919 | struct dsp_conf_member *member; | |
1920 | struct mISDNhead *hh; | |
1921 | ||
1922 | /* not if not active */ | |
1923 | if (!dsp->b_active) | |
1924 | return; | |
1925 | ||
1926 | /* check if we have sompen */ | |
1927 | if (skb->len < 1) | |
1928 | return; | |
1929 | ||
1930 | /* no conf */ | |
1931 | if (!dsp->conf) { | |
bc138ec4 AE |
1932 | /* in case of software echo */ |
1933 | if (dsp->echo.software) { | |
960366cf KK |
1934 | nskb = skb_clone(skb, GFP_ATOMIC); |
1935 | if (nskb) { | |
1936 | hh = mISDN_HEAD_P(nskb); | |
1937 | hh->prim = PH_DATA_REQ; | |
1938 | hh->id = 0; | |
1939 | skb_queue_tail(&dsp->sendq, nskb); | |
1940 | schedule_work(&dsp->workq); | |
1941 | } | |
f27b8c35 | 1942 | } |
960366cf KK |
1943 | return; |
1944 | } | |
1945 | /* in case of hardware conference */ | |
1946 | if (dsp->conf->hardware) | |
1947 | return; | |
1948 | list_for_each_entry(member, &dsp->conf->mlist, list) { | |
bc138ec4 | 1949 | if (dsp->echo.software || member->dsp != dsp) { |
960366cf KK |
1950 | nskb = skb_clone(skb, GFP_ATOMIC); |
1951 | if (nskb) { | |
1952 | hh = mISDN_HEAD_P(nskb); | |
1953 | hh->prim = PH_DATA_REQ; | |
1954 | hh->id = 0; | |
1955 | skb_queue_tail(&member->dsp->sendq, nskb); | |
1956 | schedule_work(&member->dsp->workq); | |
1957 | } | |
1958 | } | |
1959 | } | |
1960 | } | |
1961 | ||
1962 |