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960366cf KK |
1 | /* |
2 | * Author Andreas Eversberg (jolly@eversberg.eu) | |
3 | * Based on source code structure by | |
4 | * Karsten Keil (keil@isdn4linux.de) | |
5 | * | |
6 | * This file is (c) under GNU PUBLIC LICENSE | |
7 | * For changes and modifications please read | |
8 | * ../../../Documentation/isdn/mISDN.cert | |
9 | * | |
10 | * Thanks to Karsten Keil (great drivers) | |
11 | * Cologne Chip (great chips) | |
12 | * | |
13 | * This module does: | |
14 | * Real-time tone generation | |
15 | * DTMF detection | |
16 | * Real-time cross-connection and conferrence | |
17 | * Compensate jitter due to system load and hardware fault. | |
18 | * All features are done in kernel space and will be realized | |
19 | * using hardware, if available and supported by chip set. | |
20 | * Blowfish encryption/decryption | |
21 | */ | |
22 | ||
23 | /* STRUCTURE: | |
24 | * | |
25 | * The dsp module provides layer 2 for b-channels (64kbit). It provides | |
26 | * transparent audio forwarding with special digital signal processing: | |
27 | * | |
28 | * - (1) generation of tones | |
29 | * - (2) detection of dtmf tones | |
30 | * - (3) crossconnecting and conferences (clocking) | |
31 | * - (4) echo generation for delay test | |
32 | * - (5) volume control | |
33 | * - (6) disable receive data | |
34 | * - (7) pipeline | |
35 | * - (8) encryption/decryption | |
36 | * | |
37 | * Look: | |
38 | * TX RX | |
39 | * ------upper layer------ | |
40 | * | ^ | |
41 | * | |(6) | |
42 | * v | | |
43 | * +-----+-------------+-----+ | |
44 | * |(3)(4) | | |
45 | * | CMX | | |
46 | * | | | |
47 | * | +-------------+ | |
48 | * | | ^ | |
49 | * | | | | |
50 | * |+---------+| +----+----+ | |
51 | * ||(1) || |(2) | | |
52 | * || || | | | |
53 | * || Tones || | DTMF | | |
54 | * || || | | | |
55 | * || || | | | |
56 | * |+----+----+| +----+----+ | |
57 | * +-----+-----+ ^ | |
58 | * | | | |
59 | * v | | |
60 | * +----+----+ +----+----+ | |
61 | * |(5) | |(5) | | |
62 | * | | | | | |
63 | * |TX Volume| |RX Volume| | |
64 | * | | | | | |
65 | * | | | | | |
66 | * +----+----+ +----+----+ | |
67 | * | ^ | |
68 | * | | | |
69 | * v | | |
70 | * +----+-------------+----+ | |
71 | * |(7) | | |
72 | * | | | |
73 | * | Pipeline Processing | | |
74 | * | | | |
75 | * | | | |
76 | * +----+-------------+----+ | |
77 | * | ^ | |
78 | * | | | |
79 | * v | | |
80 | * +----+----+ +----+----+ | |
81 | * |(8) | |(8) | | |
82 | * | | | | | |
83 | * | Encrypt | | Decrypt | | |
84 | * | | | | | |
85 | * | | | | | |
86 | * +----+----+ +----+----+ | |
87 | * | ^ | |
88 | * | | | |
89 | * v | | |
90 | * ------card layer------ | |
91 | * TX RX | |
92 | * | |
93 | * Above you can see the logical data flow. If software is used to do the | |
94 | * process, it is actually the real data flow. If hardware is used, data | |
95 | * may not flow, but hardware commands to the card, to provide the data flow | |
96 | * as shown. | |
97 | * | |
98 | * NOTE: The channel must be activated in order to make dsp work, even if | |
99 | * no data flow to the upper layer is intended. Activation can be done | |
100 | * after and before controlling the setting using PH_CONTROL requests. | |
101 | * | |
102 | * DTMF: Will be detected by hardware if possible. It is done before CMX | |
103 | * processing. | |
104 | * | |
105 | * Tones: Will be generated via software if endless looped audio fifos are | |
106 | * not supported by hardware. Tones will override all data from CMX. | |
107 | * It is not required to join a conference to use tones at any time. | |
108 | * | |
109 | * CMX: Is transparent when not used. When it is used, it will do | |
110 | * crossconnections and conferences via software if not possible through | |
111 | * hardware. If hardware capability is available, hardware is used. | |
112 | * | |
113 | * Echo: Is generated by CMX and is used to check performane of hard and | |
114 | * software CMX. | |
115 | * | |
116 | * The CMX has special functions for conferences with one, two and more | |
117 | * members. It will allow different types of data flow. Receive and transmit | |
118 | * data to/form upper layer may be swithed on/off individually without loosing | |
119 | * features of CMX, Tones and DTMF. | |
120 | * | |
121 | * Echo Cancellation: Sometimes we like to cancel echo from the interface. | |
122 | * Note that a VoIP call may not have echo caused by the IP phone. The echo | |
123 | * is generated by the telephone line connected to it. Because the delay | |
124 | * is high, it becomes an echo. RESULT: Echo Cachelation is required if | |
125 | * both echo AND delay is applied to an interface. | |
126 | * Remember that software CMX always generates a more or less delay. | |
127 | * | |
128 | * If all used features can be realized in hardware, and if transmit and/or | |
129 | * receive data ist disabled, the card may not send/receive any data at all. | |
130 | * Not receiving is usefull if only announcements are played. Not sending is | |
131 | * usefull if an answering machine records audio. Not sending and receiving is | |
132 | * usefull during most states of the call. If supported by hardware, tones | |
133 | * will be played without cpu load. Small PBXs and NT-Mode applications will | |
134 | * not need expensive hardware when processing calls. | |
135 | * | |
136 | * | |
137 | * LOCKING: | |
138 | * | |
139 | * When data is received from upper or lower layer (card), the complete dsp | |
140 | * module is locked by a global lock. This lock MUST lock irq, because it | |
141 | * must lock timer events by DSP poll timer. | |
142 | * When data is ready to be transmitted down, the data is queued and sent | |
143 | * outside lock and timer event. | |
144 | * PH_CONTROL must not change any settings, join or split conference members | |
145 | * during process of data. | |
146 | * | |
147 | * HDLC: | |
148 | * | |
149 | * It works quite the same as transparent, except that HDLC data is forwarded | |
150 | * to all other conference members if no hardware bridging is possible. | |
151 | * Send data will be writte to sendq. Sendq will be sent if confirm is received. | |
152 | * Conference cannot join, if one member is not hdlc. | |
153 | * | |
154 | */ | |
155 | ||
156 | #include <linux/delay.h> | |
157 | #include <linux/mISDNif.h> | |
158 | #include <linux/mISDNdsp.h> | |
159 | #include <linux/module.h> | |
160 | #include <linux/vmalloc.h> | |
161 | #include "core.h" | |
162 | #include "dsp.h" | |
163 | ||
5b834354 | 164 | static const char *mISDN_dsp_revision = "2.0"; |
960366cf KK |
165 | |
166 | static int debug; | |
167 | static int options; | |
168 | static int poll; | |
169 | static int dtmfthreshold = 100; | |
170 | ||
171 | MODULE_AUTHOR("Andreas Eversberg"); | |
172 | module_param(debug, uint, S_IRUGO | S_IWUSR); | |
173 | module_param(options, uint, S_IRUGO | S_IWUSR); | |
174 | module_param(poll, uint, S_IRUGO | S_IWUSR); | |
175 | module_param(dtmfthreshold, uint, S_IRUGO | S_IWUSR); | |
176 | MODULE_LICENSE("GPL"); | |
177 | ||
178 | /*int spinnest = 0;*/ | |
179 | ||
180 | spinlock_t dsp_lock; /* global dsp lock */ | |
181 | struct list_head dsp_ilist; | |
182 | struct list_head conf_ilist; | |
183 | int dsp_debug; | |
184 | int dsp_options; | |
185 | int dsp_poll, dsp_tics; | |
186 | ||
187 | /* check if rx may be turned off or must be turned on */ | |
188 | static void | |
189 | dsp_rx_off_member(struct dsp *dsp) | |
190 | { | |
191 | struct mISDN_ctrl_req cq; | |
192 | int rx_off = 1; | |
193 | ||
8dd2f36f AE |
194 | memset(&cq, 0, sizeof(cq)); |
195 | ||
960366cf KK |
196 | if (!dsp->features_rx_off) |
197 | return; | |
198 | ||
199 | /* not disabled */ | |
200 | if (!dsp->rx_disabled) | |
201 | rx_off = 0; | |
202 | /* software dtmf */ | |
203 | else if (dsp->dtmf.software) | |
204 | rx_off = 0; | |
205 | /* echo in software */ | |
bc138ec4 | 206 | else if (dsp->echo.software) |
960366cf KK |
207 | rx_off = 0; |
208 | /* bridge in software */ | |
bc138ec4 AE |
209 | else if (dsp->conf && dsp->conf->software) |
210 | rx_off = 0; | |
211 | /* data is not required by user space and not required | |
212 | * for echo dtmf detection, soft-echo, soft-bridging */ | |
960366cf KK |
213 | |
214 | if (rx_off == dsp->rx_is_off) | |
215 | return; | |
216 | ||
217 | if (!dsp->ch.peer) { | |
218 | if (dsp_debug & DEBUG_DSP_CORE) | |
219 | printk(KERN_DEBUG "%s: no peer, no rx_off\n", | |
220 | __func__); | |
221 | return; | |
222 | } | |
223 | cq.op = MISDN_CTRL_RX_OFF; | |
224 | cq.p1 = rx_off; | |
225 | if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { | |
226 | printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", | |
227 | __func__); | |
228 | return; | |
229 | } | |
230 | dsp->rx_is_off = rx_off; | |
231 | if (dsp_debug & DEBUG_DSP_CORE) | |
232 | printk(KERN_DEBUG "%s: %s set rx_off = %d\n", | |
233 | __func__, dsp->name, rx_off); | |
234 | } | |
235 | static void | |
236 | dsp_rx_off(struct dsp *dsp) | |
237 | { | |
238 | struct dsp_conf_member *member; | |
239 | ||
240 | if (dsp_options & DSP_OPT_NOHARDWARE) | |
241 | return; | |
242 | ||
243 | /* no conf */ | |
244 | if (!dsp->conf) { | |
245 | dsp_rx_off_member(dsp); | |
246 | return; | |
247 | } | |
248 | /* check all members in conf */ | |
249 | list_for_each_entry(member, &dsp->conf->mlist, list) { | |
250 | dsp_rx_off_member(member->dsp); | |
251 | } | |
252 | } | |
253 | ||
8dd2f36f AE |
254 | /* enable "fill empty" feature */ |
255 | static void | |
256 | dsp_fill_empty(struct dsp *dsp) | |
257 | { | |
258 | struct mISDN_ctrl_req cq; | |
259 | ||
260 | memset(&cq, 0, sizeof(cq)); | |
261 | ||
262 | if (!dsp->ch.peer) { | |
263 | if (dsp_debug & DEBUG_DSP_CORE) | |
264 | printk(KERN_DEBUG "%s: no peer, no fill_empty\n", | |
265 | __func__); | |
266 | return; | |
267 | } | |
268 | cq.op = MISDN_CTRL_FILL_EMPTY; | |
269 | cq.p1 = 1; | |
270 | if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { | |
271 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", | |
272 | __func__); | |
273 | return; | |
274 | } | |
275 | if (dsp_debug & DEBUG_DSP_CORE) | |
276 | printk(KERN_DEBUG "%s: %s set fill_empty = 1\n", | |
277 | __func__, dsp->name); | |
278 | } | |
279 | ||
960366cf KK |
280 | static int |
281 | dsp_control_req(struct dsp *dsp, struct mISDNhead *hh, struct sk_buff *skb) | |
282 | { | |
eac74af9 | 283 | struct sk_buff *nskb; |
960366cf KK |
284 | int ret = 0; |
285 | int cont; | |
286 | u8 *data; | |
287 | int len; | |
288 | ||
289 | if (skb->len < sizeof(int)) | |
290 | printk(KERN_ERR "%s: PH_CONTROL message too short\n", __func__); | |
291 | cont = *((int *)skb->data); | |
292 | len = skb->len - sizeof(int); | |
293 | data = skb->data + sizeof(int); | |
294 | ||
295 | switch (cont) { | |
296 | case DTMF_TONE_START: /* turn on DTMF */ | |
297 | if (dsp->hdlc) { | |
298 | ret = -EINVAL; | |
299 | break; | |
300 | } | |
301 | if (dsp_debug & DEBUG_DSP_CORE) | |
302 | printk(KERN_DEBUG "%s: start dtmf\n", __func__); | |
303 | if (len == sizeof(int)) { | |
c6a2e587 AE |
304 | if (dsp_debug & DEBUG_DSP_CORE) |
305 | printk(KERN_NOTICE "changing DTMF Threshold " | |
306 | "to %d\n", *((int *)data)); | |
960366cf KK |
307 | dsp->dtmf.treshold = (*(int *)data) * 10000; |
308 | } | |
b0579d74 | 309 | dsp->dtmf.enable = 1; |
960366cf KK |
310 | /* init goertzel */ |
311 | dsp_dtmf_goertzel_init(dsp); | |
312 | ||
313 | /* check dtmf hardware */ | |
314 | dsp_dtmf_hardware(dsp); | |
b5df5a5c | 315 | dsp_rx_off(dsp); |
960366cf KK |
316 | break; |
317 | case DTMF_TONE_STOP: /* turn off DTMF */ | |
318 | if (dsp_debug & DEBUG_DSP_CORE) | |
319 | printk(KERN_DEBUG "%s: stop dtmf\n", __func__); | |
b0579d74 | 320 | dsp->dtmf.enable = 0; |
960366cf KK |
321 | dsp->dtmf.hardware = 0; |
322 | dsp->dtmf.software = 0; | |
323 | break; | |
324 | case DSP_CONF_JOIN: /* join / update conference */ | |
325 | if (len < sizeof(int)) { | |
326 | ret = -EINVAL; | |
327 | break; | |
328 | } | |
329 | if (*((u32 *)data) == 0) | |
330 | goto conf_split; | |
331 | if (dsp_debug & DEBUG_DSP_CORE) | |
332 | printk(KERN_DEBUG "%s: join conference %d\n", | |
333 | __func__, *((u32 *)data)); | |
334 | ret = dsp_cmx_conf(dsp, *((u32 *)data)); | |
335 | /* dsp_cmx_hardware will also be called here */ | |
336 | dsp_rx_off(dsp); | |
337 | if (dsp_debug & DEBUG_DSP_CMX) | |
338 | dsp_cmx_debug(dsp); | |
339 | break; | |
340 | case DSP_CONF_SPLIT: /* remove from conference */ | |
341 | conf_split: | |
342 | if (dsp_debug & DEBUG_DSP_CORE) | |
343 | printk(KERN_DEBUG "%s: release conference\n", __func__); | |
344 | ret = dsp_cmx_conf(dsp, 0); | |
345 | /* dsp_cmx_hardware will also be called here */ | |
346 | if (dsp_debug & DEBUG_DSP_CMX) | |
347 | dsp_cmx_debug(dsp); | |
348 | dsp_rx_off(dsp); | |
349 | break; | |
350 | case DSP_TONE_PATT_ON: /* play tone */ | |
351 | if (dsp->hdlc) { | |
352 | ret = -EINVAL; | |
353 | break; | |
354 | } | |
355 | if (len < sizeof(int)) { | |
356 | ret = -EINVAL; | |
357 | break; | |
358 | } | |
359 | if (dsp_debug & DEBUG_DSP_CORE) | |
360 | printk(KERN_DEBUG "%s: turn tone 0x%x on\n", | |
361 | __func__, *((int *)skb->data)); | |
362 | ret = dsp_tone(dsp, *((int *)data)); | |
363 | if (!ret) { | |
364 | dsp_cmx_hardware(dsp->conf, dsp); | |
365 | dsp_rx_off(dsp); | |
366 | } | |
367 | if (!dsp->tone.tone) | |
368 | goto tone_off; | |
369 | break; | |
370 | case DSP_TONE_PATT_OFF: /* stop tone */ | |
371 | if (dsp->hdlc) { | |
372 | ret = -EINVAL; | |
373 | break; | |
374 | } | |
375 | if (dsp_debug & DEBUG_DSP_CORE) | |
376 | printk(KERN_DEBUG "%s: turn tone off\n", __func__); | |
377 | dsp_tone(dsp, 0); | |
378 | dsp_cmx_hardware(dsp->conf, dsp); | |
379 | dsp_rx_off(dsp); | |
380 | /* reset tx buffers (user space data) */ | |
381 | tone_off: | |
382 | dsp->rx_W = 0; | |
383 | dsp->rx_R = 0; | |
384 | break; | |
385 | case DSP_VOL_CHANGE_TX: /* change volume */ | |
386 | if (dsp->hdlc) { | |
387 | ret = -EINVAL; | |
388 | break; | |
389 | } | |
390 | if (len < sizeof(int)) { | |
391 | ret = -EINVAL; | |
392 | break; | |
393 | } | |
394 | dsp->tx_volume = *((int *)data); | |
395 | if (dsp_debug & DEBUG_DSP_CORE) | |
396 | printk(KERN_DEBUG "%s: change tx vol to %d\n", | |
397 | __func__, dsp->tx_volume); | |
398 | dsp_cmx_hardware(dsp->conf, dsp); | |
399 | dsp_dtmf_hardware(dsp); | |
400 | dsp_rx_off(dsp); | |
401 | break; | |
402 | case DSP_VOL_CHANGE_RX: /* change volume */ | |
403 | if (dsp->hdlc) { | |
404 | ret = -EINVAL; | |
405 | break; | |
406 | } | |
407 | if (len < sizeof(int)) { | |
408 | ret = -EINVAL; | |
409 | break; | |
410 | } | |
411 | dsp->rx_volume = *((int *)data); | |
412 | if (dsp_debug & DEBUG_DSP_CORE) | |
413 | printk(KERN_DEBUG "%s: change rx vol to %d\n", | |
414 | __func__, dsp->tx_volume); | |
415 | dsp_cmx_hardware(dsp->conf, dsp); | |
416 | dsp_dtmf_hardware(dsp); | |
417 | dsp_rx_off(dsp); | |
418 | break; | |
419 | case DSP_ECHO_ON: /* enable echo */ | |
bc138ec4 | 420 | dsp->echo.software = 1; /* soft echo */ |
960366cf KK |
421 | if (dsp_debug & DEBUG_DSP_CORE) |
422 | printk(KERN_DEBUG "%s: enable cmx-echo\n", __func__); | |
423 | dsp_cmx_hardware(dsp->conf, dsp); | |
424 | dsp_rx_off(dsp); | |
425 | if (dsp_debug & DEBUG_DSP_CMX) | |
426 | dsp_cmx_debug(dsp); | |
427 | break; | |
428 | case DSP_ECHO_OFF: /* disable echo */ | |
bc138ec4 AE |
429 | dsp->echo.software = 0; |
430 | dsp->echo.hardware = 0; | |
960366cf KK |
431 | if (dsp_debug & DEBUG_DSP_CORE) |
432 | printk(KERN_DEBUG "%s: disable cmx-echo\n", __func__); | |
433 | dsp_cmx_hardware(dsp->conf, dsp); | |
434 | dsp_rx_off(dsp); | |
435 | if (dsp_debug & DEBUG_DSP_CMX) | |
436 | dsp_cmx_debug(dsp); | |
437 | break; | |
438 | case DSP_RECEIVE_ON: /* enable receive to user space */ | |
439 | if (dsp_debug & DEBUG_DSP_CORE) | |
440 | printk(KERN_DEBUG "%s: enable receive to user " | |
441 | "space\n", __func__); | |
442 | dsp->rx_disabled = 0; | |
443 | dsp_rx_off(dsp); | |
444 | break; | |
445 | case DSP_RECEIVE_OFF: /* disable receive to user space */ | |
446 | if (dsp_debug & DEBUG_DSP_CORE) | |
447 | printk(KERN_DEBUG "%s: disable receive to " | |
448 | "user space\n", __func__); | |
449 | dsp->rx_disabled = 1; | |
450 | dsp_rx_off(dsp); | |
451 | break; | |
452 | case DSP_MIX_ON: /* enable mixing of tx data */ | |
453 | if (dsp->hdlc) { | |
454 | ret = -EINVAL; | |
455 | break; | |
456 | } | |
457 | if (dsp_debug & DEBUG_DSP_CORE) | |
458 | printk(KERN_DEBUG "%s: enable mixing of " | |
459 | "tx-data with conf mebers\n", __func__); | |
460 | dsp->tx_mix = 1; | |
461 | dsp_cmx_hardware(dsp->conf, dsp); | |
462 | dsp_rx_off(dsp); | |
463 | if (dsp_debug & DEBUG_DSP_CMX) | |
464 | dsp_cmx_debug(dsp); | |
465 | break; | |
466 | case DSP_MIX_OFF: /* disable mixing of tx data */ | |
467 | if (dsp->hdlc) { | |
468 | ret = -EINVAL; | |
469 | break; | |
470 | } | |
471 | if (dsp_debug & DEBUG_DSP_CORE) | |
472 | printk(KERN_DEBUG "%s: disable mixing of " | |
473 | "tx-data with conf mebers\n", __func__); | |
474 | dsp->tx_mix = 0; | |
475 | dsp_cmx_hardware(dsp->conf, dsp); | |
476 | dsp_rx_off(dsp); | |
477 | if (dsp_debug & DEBUG_DSP_CMX) | |
478 | dsp_cmx_debug(dsp); | |
479 | break; | |
480 | case DSP_TXDATA_ON: /* enable txdata */ | |
481 | dsp->tx_data = 1; | |
482 | if (dsp_debug & DEBUG_DSP_CORE) | |
483 | printk(KERN_DEBUG "%s: enable tx-data\n", __func__); | |
484 | dsp_cmx_hardware(dsp->conf, dsp); | |
485 | dsp_rx_off(dsp); | |
486 | if (dsp_debug & DEBUG_DSP_CMX) | |
487 | dsp_cmx_debug(dsp); | |
488 | break; | |
489 | case DSP_TXDATA_OFF: /* disable txdata */ | |
490 | dsp->tx_data = 0; | |
491 | if (dsp_debug & DEBUG_DSP_CORE) | |
492 | printk(KERN_DEBUG "%s: disable tx-data\n", __func__); | |
493 | dsp_cmx_hardware(dsp->conf, dsp); | |
494 | dsp_rx_off(dsp); | |
495 | if (dsp_debug & DEBUG_DSP_CMX) | |
496 | dsp_cmx_debug(dsp); | |
497 | break; | |
498 | case DSP_DELAY: /* use delay algorithm instead of dynamic | |
499 | jitter algorithm */ | |
500 | if (dsp->hdlc) { | |
501 | ret = -EINVAL; | |
502 | break; | |
503 | } | |
504 | if (len < sizeof(int)) { | |
505 | ret = -EINVAL; | |
506 | break; | |
507 | } | |
508 | dsp->cmx_delay = (*((int *)data)) << 3; | |
19af5cdb | 509 | /* milliseconds to samples */ |
960366cf KK |
510 | if (dsp->cmx_delay >= (CMX_BUFF_HALF>>1)) |
511 | /* clip to half of maximum usable buffer | |
512 | (half of half buffer) */ | |
513 | dsp->cmx_delay = (CMX_BUFF_HALF>>1) - 1; | |
514 | if (dsp_debug & DEBUG_DSP_CORE) | |
515 | printk(KERN_DEBUG "%s: use delay algorithm to " | |
516 | "compensate jitter (%d samples)\n", | |
517 | __func__, dsp->cmx_delay); | |
518 | break; | |
519 | case DSP_JITTER: /* use dynamic jitter algorithm instead of | |
520 | delay algorithm */ | |
521 | if (dsp->hdlc) { | |
522 | ret = -EINVAL; | |
523 | break; | |
524 | } | |
525 | dsp->cmx_delay = 0; | |
526 | if (dsp_debug & DEBUG_DSP_CORE) | |
527 | printk(KERN_DEBUG "%s: use jitter algorithm to " | |
528 | "compensate jitter\n", __func__); | |
529 | break; | |
530 | case DSP_TX_DEJITTER: /* use dynamic jitter algorithm for tx-buffer */ | |
531 | if (dsp->hdlc) { | |
532 | ret = -EINVAL; | |
533 | break; | |
534 | } | |
535 | dsp->tx_dejitter = 1; | |
536 | if (dsp_debug & DEBUG_DSP_CORE) | |
537 | printk(KERN_DEBUG "%s: use dejitter on TX " | |
538 | "buffer\n", __func__); | |
539 | break; | |
540 | case DSP_TX_DEJ_OFF: /* use tx-buffer without dejittering*/ | |
541 | if (dsp->hdlc) { | |
542 | ret = -EINVAL; | |
543 | break; | |
544 | } | |
545 | dsp->tx_dejitter = 0; | |
546 | if (dsp_debug & DEBUG_DSP_CORE) | |
547 | printk(KERN_DEBUG "%s: use TX buffer without " | |
548 | "dejittering\n", __func__); | |
549 | break; | |
550 | case DSP_PIPELINE_CFG: | |
551 | if (dsp->hdlc) { | |
552 | ret = -EINVAL; | |
553 | break; | |
554 | } | |
555 | if (len > 0 && ((char *)data)[len - 1]) { | |
556 | printk(KERN_DEBUG "%s: pipeline config string " | |
557 | "is not NULL terminated!\n", __func__); | |
558 | ret = -EINVAL; | |
559 | } else { | |
560 | dsp->pipeline.inuse = 1; | |
561 | dsp_cmx_hardware(dsp->conf, dsp); | |
562 | ret = dsp_pipeline_build(&dsp->pipeline, | |
eac74af9 | 563 | len > 0 ? data : NULL); |
960366cf KK |
564 | dsp_cmx_hardware(dsp->conf, dsp); |
565 | dsp_rx_off(dsp); | |
566 | } | |
567 | break; | |
568 | case DSP_BF_ENABLE_KEY: /* turn blowfish on */ | |
569 | if (dsp->hdlc) { | |
570 | ret = -EINVAL; | |
571 | break; | |
572 | } | |
573 | if (len < 4 || len > 56) { | |
574 | ret = -EINVAL; | |
575 | break; | |
576 | } | |
577 | if (dsp_debug & DEBUG_DSP_CORE) | |
578 | printk(KERN_DEBUG "%s: turn blowfish on (key " | |
579 | "not shown)\n", __func__); | |
580 | ret = dsp_bf_init(dsp, (u8 *)data, len); | |
581 | /* set new cont */ | |
582 | if (!ret) | |
583 | cont = DSP_BF_ACCEPT; | |
584 | else | |
585 | cont = DSP_BF_REJECT; | |
586 | /* send indication if it worked to set it */ | |
587 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, MISDN_ID_ANY, | |
588 | sizeof(int), &cont, GFP_ATOMIC); | |
589 | if (nskb) { | |
590 | if (dsp->up) { | |
591 | if (dsp->up->send(dsp->up, nskb)) | |
592 | dev_kfree_skb(nskb); | |
593 | } else | |
594 | dev_kfree_skb(nskb); | |
595 | } | |
596 | if (!ret) { | |
597 | dsp_cmx_hardware(dsp->conf, dsp); | |
598 | dsp_dtmf_hardware(dsp); | |
599 | dsp_rx_off(dsp); | |
600 | } | |
601 | break; | |
602 | case DSP_BF_DISABLE: /* turn blowfish off */ | |
603 | if (dsp->hdlc) { | |
604 | ret = -EINVAL; | |
605 | break; | |
606 | } | |
607 | if (dsp_debug & DEBUG_DSP_CORE) | |
608 | printk(KERN_DEBUG "%s: turn blowfish off\n", __func__); | |
609 | dsp_bf_cleanup(dsp); | |
610 | dsp_cmx_hardware(dsp->conf, dsp); | |
611 | dsp_dtmf_hardware(dsp); | |
612 | dsp_rx_off(dsp); | |
613 | break; | |
614 | default: | |
615 | if (dsp_debug & DEBUG_DSP_CORE) | |
616 | printk(KERN_DEBUG "%s: ctrl req %x unhandled\n", | |
617 | __func__, cont); | |
618 | ret = -EINVAL; | |
619 | } | |
620 | return ret; | |
621 | } | |
622 | ||
623 | static void | |
624 | get_features(struct mISDNchannel *ch) | |
625 | { | |
626 | struct dsp *dsp = container_of(ch, struct dsp, ch); | |
627 | struct mISDN_ctrl_req cq; | |
628 | ||
960366cf KK |
629 | if (!ch->peer) { |
630 | if (dsp_debug & DEBUG_DSP_CORE) | |
631 | printk(KERN_DEBUG "%s: no peer, no features\n", | |
632 | __func__); | |
633 | return; | |
634 | } | |
635 | memset(&cq, 0, sizeof(cq)); | |
636 | cq.op = MISDN_CTRL_GETOP; | |
637 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq) < 0) { | |
638 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", | |
639 | __func__); | |
640 | return; | |
641 | } | |
642 | if (cq.op & MISDN_CTRL_RX_OFF) | |
643 | dsp->features_rx_off = 1; | |
8dd2f36f AE |
644 | if (cq.op & MISDN_CTRL_FILL_EMPTY) |
645 | dsp->features_fill_empty = 1; | |
646 | if (dsp_options & DSP_OPT_NOHARDWARE) | |
647 | return; | |
960366cf KK |
648 | if ((cq.op & MISDN_CTRL_HW_FEATURES_OP)) { |
649 | cq.op = MISDN_CTRL_HW_FEATURES; | |
650 | *((u_long *)&cq.p1) = (u_long)&dsp->features; | |
651 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq)) { | |
652 | printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", | |
653 | __func__); | |
654 | } | |
655 | } else | |
656 | if (dsp_debug & DEBUG_DSP_CORE) | |
657 | printk(KERN_DEBUG "%s: features not supported for %s\n", | |
658 | __func__, dsp->name); | |
659 | } | |
660 | ||
661 | static int | |
662 | dsp_function(struct mISDNchannel *ch, struct sk_buff *skb) | |
663 | { | |
b5df5a5c | 664 | struct dsp *dsp = container_of(ch, struct dsp, ch); |
960366cf KK |
665 | struct mISDNhead *hh; |
666 | int ret = 0; | |
b5df5a5c | 667 | u8 *digits = NULL; |
960366cf KK |
668 | u_long flags; |
669 | ||
670 | hh = mISDN_HEAD_P(skb); | |
671 | switch (hh->prim) { | |
672 | /* FROM DOWN */ | |
673 | case (PH_DATA_CNF): | |
674 | dsp->data_pending = 0; | |
675 | /* trigger next hdlc frame, if any */ | |
676 | if (dsp->hdlc) { | |
677 | spin_lock_irqsave(&dsp_lock, flags); | |
678 | if (dsp->b_active) | |
679 | schedule_work(&dsp->workq); | |
680 | spin_unlock_irqrestore(&dsp_lock, flags); | |
681 | } | |
682 | break; | |
683 | case (PH_DATA_IND): | |
684 | case (DL_DATA_IND): | |
685 | if (skb->len < 1) { | |
686 | ret = -EINVAL; | |
687 | break; | |
688 | } | |
689 | if (dsp->rx_is_off) { | |
690 | if (dsp_debug & DEBUG_DSP_CORE) | |
691 | printk(KERN_DEBUG "%s: rx-data during rx_off" | |
692 | " for %s\n", | |
693 | __func__, dsp->name); | |
694 | } | |
695 | if (dsp->hdlc) { | |
696 | /* hdlc */ | |
697 | spin_lock_irqsave(&dsp_lock, flags); | |
698 | dsp_cmx_hdlc(dsp, skb); | |
699 | spin_unlock_irqrestore(&dsp_lock, flags); | |
700 | if (dsp->rx_disabled) { | |
701 | /* if receive is not allowed */ | |
702 | break; | |
703 | } | |
704 | hh->prim = DL_DATA_IND; | |
705 | if (dsp->up) | |
706 | return dsp->up->send(dsp->up, skb); | |
707 | break; | |
708 | } | |
709 | ||
ba3af34e AE |
710 | spin_lock_irqsave(&dsp_lock, flags); |
711 | ||
960366cf KK |
712 | /* decrypt if enabled */ |
713 | if (dsp->bf_enable) | |
714 | dsp_bf_decrypt(dsp, skb->data, skb->len); | |
715 | /* pipeline */ | |
716 | if (dsp->pipeline.inuse) | |
717 | dsp_pipeline_process_rx(&dsp->pipeline, skb->data, | |
7cfa153d | 718 | skb->len, hh->id); |
960366cf KK |
719 | /* change volume if requested */ |
720 | if (dsp->rx_volume) | |
721 | dsp_change_volume(skb, dsp->rx_volume); | |
960366cf KK |
722 | /* check if dtmf soft decoding is turned on */ |
723 | if (dsp->dtmf.software) { | |
724 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, | |
eac74af9 | 725 | skb->len, (dsp_options&DSP_OPT_ULAW) ? 1 : 0); |
b5df5a5c AE |
726 | } |
727 | /* we need to process receive data if software */ | |
bc138ec4 | 728 | if (dsp->conf && dsp->conf->software) { |
b5df5a5c AE |
729 | /* process data from card at cmx */ |
730 | dsp_cmx_receive(dsp, skb); | |
731 | } | |
732 | ||
733 | spin_unlock_irqrestore(&dsp_lock, flags); | |
734 | ||
735 | /* send dtmf result, if any */ | |
736 | if (digits) { | |
960366cf | 737 | while (*digits) { |
b5df5a5c | 738 | int k; |
bb68b1d9 | 739 | struct sk_buff *nskb; |
960366cf KK |
740 | if (dsp_debug & DEBUG_DSP_DTMF) |
741 | printk(KERN_DEBUG "%s: digit" | |
742 | "(%c) to layer %s\n", | |
743 | __func__, *digits, dsp->name); | |
b5df5a5c | 744 | k = *digits | DTMF_TONE_VAL; |
960366cf | 745 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, |
b5df5a5c AE |
746 | MISDN_ID_ANY, sizeof(int), &k, |
747 | GFP_ATOMIC); | |
960366cf KK |
748 | if (nskb) { |
749 | if (dsp->up) { | |
750 | if (dsp->up->send( | |
751 | dsp->up, nskb)) | |
b5df5a5c | 752 | dev_kfree_skb(nskb); |
960366cf KK |
753 | } else |
754 | dev_kfree_skb(nskb); | |
755 | } | |
756 | digits++; | |
757 | } | |
758 | } | |
960366cf KK |
759 | if (dsp->rx_disabled) { |
760 | /* if receive is not allowed */ | |
761 | break; | |
762 | } | |
763 | hh->prim = DL_DATA_IND; | |
764 | if (dsp->up) | |
765 | return dsp->up->send(dsp->up, skb); | |
766 | break; | |
767 | case (PH_CONTROL_IND): | |
768 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) | |
769 | printk(KERN_DEBUG "%s: PH_CONTROL INDICATION " | |
770 | "received: %x (len %d) %s\n", __func__, | |
771 | hh->id, skb->len, dsp->name); | |
772 | switch (hh->id) { | |
773 | case (DTMF_HFC_COEF): /* getting coefficients */ | |
774 | if (!dsp->dtmf.hardware) { | |
775 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) | |
776 | printk(KERN_DEBUG "%s: ignoring DTMF " | |
777 | "coefficients from HFC\n", | |
778 | __func__); | |
779 | break; | |
780 | } | |
781 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, | |
782 | skb->len, 2); | |
783 | while (*digits) { | |
784 | int k; | |
785 | struct sk_buff *nskb; | |
786 | if (dsp_debug & DEBUG_DSP_DTMF) | |
787 | printk(KERN_DEBUG "%s: digit" | |
788 | "(%c) to layer %s\n", | |
789 | __func__, *digits, dsp->name); | |
790 | k = *digits | DTMF_TONE_VAL; | |
791 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, | |
792 | MISDN_ID_ANY, sizeof(int), &k, | |
793 | GFP_ATOMIC); | |
794 | if (nskb) { | |
795 | if (dsp->up) { | |
796 | if (dsp->up->send( | |
797 | dsp->up, nskb)) | |
b5df5a5c | 798 | dev_kfree_skb(nskb); |
960366cf KK |
799 | } else |
800 | dev_kfree_skb(nskb); | |
801 | } | |
802 | digits++; | |
803 | } | |
804 | break; | |
805 | case (HFC_VOL_CHANGE_TX): /* change volume */ | |
806 | if (skb->len != sizeof(int)) { | |
807 | ret = -EINVAL; | |
808 | break; | |
809 | } | |
810 | spin_lock_irqsave(&dsp_lock, flags); | |
811 | dsp->tx_volume = *((int *)skb->data); | |
812 | if (dsp_debug & DEBUG_DSP_CORE) | |
813 | printk(KERN_DEBUG "%s: change tx volume to " | |
814 | "%d\n", __func__, dsp->tx_volume); | |
815 | dsp_cmx_hardware(dsp->conf, dsp); | |
816 | dsp_dtmf_hardware(dsp); | |
817 | dsp_rx_off(dsp); | |
818 | spin_unlock_irqrestore(&dsp_lock, flags); | |
819 | break; | |
820 | default: | |
821 | if (dsp_debug & DEBUG_DSP_CORE) | |
822 | printk(KERN_DEBUG "%s: ctrl ind %x unhandled " | |
823 | "%s\n", __func__, hh->id, dsp->name); | |
824 | ret = -EINVAL; | |
825 | } | |
826 | break; | |
827 | case (PH_ACTIVATE_IND): | |
828 | case (PH_ACTIVATE_CNF): | |
829 | if (dsp_debug & DEBUG_DSP_CORE) | |
830 | printk(KERN_DEBUG "%s: b_channel is now active %s\n", | |
831 | __func__, dsp->name); | |
832 | /* bchannel now active */ | |
833 | spin_lock_irqsave(&dsp_lock, flags); | |
834 | dsp->b_active = 1; | |
835 | dsp->data_pending = 0; | |
836 | dsp->rx_init = 1; | |
837 | /* rx_W and rx_R will be adjusted on first frame */ | |
838 | dsp->rx_W = 0; | |
839 | dsp->rx_R = 0; | |
840 | memset(dsp->rx_buff, 0, sizeof(dsp->rx_buff)); | |
841 | dsp_cmx_hardware(dsp->conf, dsp); | |
842 | dsp_dtmf_hardware(dsp); | |
843 | dsp_rx_off(dsp); | |
844 | spin_unlock_irqrestore(&dsp_lock, flags); | |
845 | if (dsp_debug & DEBUG_DSP_CORE) | |
846 | printk(KERN_DEBUG "%s: done with activation, sending " | |
847 | "confirm to user space. %s\n", __func__, | |
848 | dsp->name); | |
849 | /* send activation to upper layer */ | |
850 | hh->prim = DL_ESTABLISH_CNF; | |
851 | if (dsp->up) | |
852 | return dsp->up->send(dsp->up, skb); | |
853 | break; | |
854 | case (PH_DEACTIVATE_IND): | |
855 | case (PH_DEACTIVATE_CNF): | |
856 | if (dsp_debug & DEBUG_DSP_CORE) | |
857 | printk(KERN_DEBUG "%s: b_channel is now inactive %s\n", | |
858 | __func__, dsp->name); | |
859 | /* bchannel now inactive */ | |
860 | spin_lock_irqsave(&dsp_lock, flags); | |
861 | dsp->b_active = 0; | |
862 | dsp->data_pending = 0; | |
863 | dsp_cmx_hardware(dsp->conf, dsp); | |
864 | dsp_rx_off(dsp); | |
865 | spin_unlock_irqrestore(&dsp_lock, flags); | |
866 | hh->prim = DL_RELEASE_CNF; | |
867 | if (dsp->up) | |
868 | return dsp->up->send(dsp->up, skb); | |
869 | break; | |
870 | /* FROM UP */ | |
871 | case (DL_DATA_REQ): | |
872 | case (PH_DATA_REQ): | |
873 | if (skb->len < 1) { | |
874 | ret = -EINVAL; | |
875 | break; | |
876 | } | |
877 | if (dsp->hdlc) { | |
878 | /* hdlc */ | |
e4cce225 PS |
879 | if (!dsp->b_active) { |
880 | ret = -EIO; | |
881 | break; | |
960366cf | 882 | } |
e4cce225 PS |
883 | hh->prim = PH_DATA_REQ; |
884 | spin_lock_irqsave(&dsp_lock, flags); | |
885 | skb_queue_tail(&dsp->sendq, skb); | |
886 | schedule_work(&dsp->workq); | |
960366cf KK |
887 | spin_unlock_irqrestore(&dsp_lock, flags); |
888 | return 0; | |
889 | } | |
890 | /* send data to tx-buffer (if no tone is played) */ | |
891 | if (!dsp->tone.tone) { | |
892 | spin_lock_irqsave(&dsp_lock, flags); | |
893 | dsp_cmx_transmit(dsp, skb); | |
894 | spin_unlock_irqrestore(&dsp_lock, flags); | |
895 | } | |
896 | break; | |
897 | case (PH_CONTROL_REQ): | |
898 | spin_lock_irqsave(&dsp_lock, flags); | |
899 | ret = dsp_control_req(dsp, hh, skb); | |
900 | spin_unlock_irqrestore(&dsp_lock, flags); | |
901 | break; | |
902 | case (DL_ESTABLISH_REQ): | |
903 | case (PH_ACTIVATE_REQ): | |
904 | if (dsp_debug & DEBUG_DSP_CORE) | |
905 | printk(KERN_DEBUG "%s: activating b_channel %s\n", | |
906 | __func__, dsp->name); | |
907 | if (dsp->dtmf.hardware || dsp->dtmf.software) | |
908 | dsp_dtmf_goertzel_init(dsp); | |
909 | get_features(ch); | |
8dd2f36f AE |
910 | /* enable fill_empty feature */ |
911 | if (dsp->features_fill_empty) | |
912 | dsp_fill_empty(dsp); | |
960366cf KK |
913 | /* send ph_activate */ |
914 | hh->prim = PH_ACTIVATE_REQ; | |
915 | if (ch->peer) | |
916 | return ch->recv(ch->peer, skb); | |
917 | break; | |
918 | case (DL_RELEASE_REQ): | |
919 | case (PH_DEACTIVATE_REQ): | |
920 | if (dsp_debug & DEBUG_DSP_CORE) | |
921 | printk(KERN_DEBUG "%s: releasing b_channel %s\n", | |
922 | __func__, dsp->name); | |
923 | spin_lock_irqsave(&dsp_lock, flags); | |
924 | dsp->tone.tone = 0; | |
925 | dsp->tone.hardware = 0; | |
926 | dsp->tone.software = 0; | |
927 | if (timer_pending(&dsp->tone.tl)) | |
928 | del_timer(&dsp->tone.tl); | |
929 | if (dsp->conf) | |
930 | dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be | |
931 | called here */ | |
932 | skb_queue_purge(&dsp->sendq); | |
933 | spin_unlock_irqrestore(&dsp_lock, flags); | |
934 | hh->prim = PH_DEACTIVATE_REQ; | |
935 | if (ch->peer) | |
936 | return ch->recv(ch->peer, skb); | |
937 | break; | |
938 | default: | |
939 | if (dsp_debug & DEBUG_DSP_CORE) | |
940 | printk(KERN_DEBUG "%s: msg %x unhandled %s\n", | |
941 | __func__, hh->prim, dsp->name); | |
942 | ret = -EINVAL; | |
943 | } | |
944 | if (!ret) | |
945 | dev_kfree_skb(skb); | |
946 | return ret; | |
947 | } | |
948 | ||
949 | static int | |
950 | dsp_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
951 | { | |
952 | struct dsp *dsp = container_of(ch, struct dsp, ch); | |
953 | u_long flags; | |
954 | int err = 0; | |
955 | ||
956 | if (debug & DEBUG_DSP_CTRL) | |
eac74af9 | 957 | printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd); |
960366cf KK |
958 | |
959 | switch (cmd) { | |
960 | case OPEN_CHANNEL: | |
961 | break; | |
962 | case CLOSE_CHANNEL: | |
963 | if (dsp->ch.peer) | |
964 | dsp->ch.peer->ctrl(dsp->ch.peer, CLOSE_CHANNEL, NULL); | |
965 | ||
966 | /* wait until workqueue has finished, | |
967 | * must lock here, or we may hit send-process currently | |
968 | * queueing. */ | |
969 | spin_lock_irqsave(&dsp_lock, flags); | |
970 | dsp->b_active = 0; | |
971 | spin_unlock_irqrestore(&dsp_lock, flags); | |
972 | /* MUST not be locked, because it waits until queue is done. */ | |
973 | cancel_work_sync(&dsp->workq); | |
974 | spin_lock_irqsave(&dsp_lock, flags); | |
975 | if (timer_pending(&dsp->tone.tl)) | |
976 | del_timer(&dsp->tone.tl); | |
977 | skb_queue_purge(&dsp->sendq); | |
978 | if (dsp_debug & DEBUG_DSP_CTRL) | |
979 | printk(KERN_DEBUG "%s: releasing member %s\n", | |
980 | __func__, dsp->name); | |
981 | dsp->b_active = 0; | |
982 | dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be called | |
983 | here */ | |
984 | dsp_pipeline_destroy(&dsp->pipeline); | |
985 | ||
986 | if (dsp_debug & DEBUG_DSP_CTRL) | |
987 | printk(KERN_DEBUG "%s: remove & destroy object %s\n", | |
988 | __func__, dsp->name); | |
989 | list_del(&dsp->list); | |
990 | spin_unlock_irqrestore(&dsp_lock, flags); | |
991 | ||
992 | if (dsp_debug & DEBUG_DSP_CTRL) | |
993 | printk(KERN_DEBUG "%s: dsp instance released\n", | |
994 | __func__); | |
995 | vfree(dsp); | |
996 | module_put(THIS_MODULE); | |
997 | break; | |
998 | } | |
999 | return err; | |
1000 | } | |
1001 | ||
1002 | static void | |
1003 | dsp_send_bh(struct work_struct *work) | |
1004 | { | |
1005 | struct dsp *dsp = container_of(work, struct dsp, workq); | |
1006 | struct sk_buff *skb; | |
1007 | struct mISDNhead *hh; | |
1008 | ||
1009 | if (dsp->hdlc && dsp->data_pending) | |
1010 | return; /* wait until data has been acknowledged */ | |
1011 | ||
1012 | /* send queued data */ | |
1013 | while ((skb = skb_dequeue(&dsp->sendq))) { | |
1014 | /* in locked date, we must have still data in queue */ | |
1015 | if (dsp->data_pending) { | |
1016 | if (dsp_debug & DEBUG_DSP_CORE) | |
1017 | printk(KERN_DEBUG "%s: fifo full %s, this is " | |
1018 | "no bug!\n", __func__, dsp->name); | |
1019 | /* flush transparent data, if not acked */ | |
1020 | dev_kfree_skb(skb); | |
1021 | continue; | |
1022 | } | |
1023 | hh = mISDN_HEAD_P(skb); | |
1024 | if (hh->prim == DL_DATA_REQ) { | |
1025 | /* send packet up */ | |
1026 | if (dsp->up) { | |
1027 | if (dsp->up->send(dsp->up, skb)) | |
1028 | dev_kfree_skb(skb); | |
1029 | } else | |
1030 | dev_kfree_skb(skb); | |
1031 | } else { | |
1032 | /* send packet down */ | |
1033 | if (dsp->ch.peer) { | |
1034 | dsp->data_pending = 1; | |
1035 | if (dsp->ch.recv(dsp->ch.peer, skb)) { | |
1036 | dev_kfree_skb(skb); | |
1037 | dsp->data_pending = 0; | |
1038 | } | |
1039 | } else | |
1040 | dev_kfree_skb(skb); | |
1041 | } | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | static int | |
1046 | dspcreate(struct channel_req *crq) | |
1047 | { | |
1048 | struct dsp *ndsp; | |
1049 | u_long flags; | |
1050 | ||
1051 | if (crq->protocol != ISDN_P_B_L2DSP | |
1052 | && crq->protocol != ISDN_P_B_L2DSPHDLC) | |
1053 | return -EPROTONOSUPPORT; | |
1054 | ndsp = vmalloc(sizeof(struct dsp)); | |
1055 | if (!ndsp) { | |
1056 | printk(KERN_ERR "%s: vmalloc struct dsp failed\n", __func__); | |
1057 | return -ENOMEM; | |
1058 | } | |
1059 | memset(ndsp, 0, sizeof(struct dsp)); | |
1060 | if (dsp_debug & DEBUG_DSP_CTRL) | |
1061 | printk(KERN_DEBUG "%s: creating new dsp instance\n", __func__); | |
1062 | ||
1063 | /* default enabled */ | |
1064 | INIT_WORK(&ndsp->workq, (void *)dsp_send_bh); | |
1065 | skb_queue_head_init(&ndsp->sendq); | |
1066 | ndsp->ch.send = dsp_function; | |
1067 | ndsp->ch.ctrl = dsp_ctrl; | |
1068 | ndsp->up = crq->ch; | |
1069 | crq->ch = &ndsp->ch; | |
1070 | if (crq->protocol == ISDN_P_B_L2DSP) { | |
1071 | crq->protocol = ISDN_P_B_RAW; | |
1072 | ndsp->hdlc = 0; | |
1073 | } else { | |
1074 | crq->protocol = ISDN_P_B_HDLC; | |
1075 | ndsp->hdlc = 1; | |
1076 | } | |
1077 | if (!try_module_get(THIS_MODULE)) | |
1078 | printk(KERN_WARNING "%s:cannot get module\n", | |
1079 | __func__); | |
1080 | ||
1081 | sprintf(ndsp->name, "DSP_C%x(0x%p)", | |
1082 | ndsp->up->st->dev->id + 1, ndsp); | |
1083 | /* set frame size to start */ | |
1084 | ndsp->features.hfc_id = -1; /* current PCM id */ | |
1085 | ndsp->features.pcm_id = -1; /* current PCM id */ | |
1086 | ndsp->pcm_slot_rx = -1; /* current CPM slot */ | |
1087 | ndsp->pcm_slot_tx = -1; | |
1088 | ndsp->pcm_bank_rx = -1; | |
1089 | ndsp->pcm_bank_tx = -1; | |
1090 | ndsp->hfc_conf = -1; /* current conference number */ | |
1091 | /* set tone timer */ | |
1092 | ndsp->tone.tl.function = (void *)dsp_tone_timeout; | |
1093 | ndsp->tone.tl.data = (long) ndsp; | |
1094 | init_timer(&ndsp->tone.tl); | |
1095 | ||
1096 | if (dtmfthreshold < 20 || dtmfthreshold > 500) | |
1097 | dtmfthreshold = 200; | |
1098 | ndsp->dtmf.treshold = dtmfthreshold*10000; | |
1099 | ||
1100 | /* init pipeline append to list */ | |
1101 | spin_lock_irqsave(&dsp_lock, flags); | |
1102 | dsp_pipeline_init(&ndsp->pipeline); | |
1103 | list_add_tail(&ndsp->list, &dsp_ilist); | |
1104 | spin_unlock_irqrestore(&dsp_lock, flags); | |
1105 | ||
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | ||
1110 | static struct Bprotocol DSP = { | |
1111 | .Bprotocols = (1 << (ISDN_P_B_L2DSP & ISDN_P_B_MASK)) | |
1112 | | (1 << (ISDN_P_B_L2DSPHDLC & ISDN_P_B_MASK)), | |
1113 | .name = "dsp", | |
1114 | .create = dspcreate | |
1115 | }; | |
1116 | ||
1117 | static int dsp_init(void) | |
1118 | { | |
1119 | int err; | |
1120 | int tics; | |
1121 | ||
1122 | printk(KERN_INFO "DSP modul %s\n", mISDN_dsp_revision); | |
1123 | ||
1124 | dsp_options = options; | |
1125 | dsp_debug = debug; | |
1126 | ||
1127 | /* set packet size */ | |
1128 | dsp_poll = poll; | |
1129 | if (dsp_poll) { | |
1130 | if (dsp_poll > MAX_POLL) { | |
1131 | printk(KERN_ERR "%s: Wrong poll value (%d), use %d " | |
1132 | "maximum.\n", __func__, poll, MAX_POLL); | |
1133 | err = -EINVAL; | |
1134 | return err; | |
1135 | } | |
1136 | if (dsp_poll < 8) { | |
1137 | printk(KERN_ERR "%s: Wrong poll value (%d), use 8 " | |
1138 | "minimum.\n", __func__, dsp_poll); | |
1139 | err = -EINVAL; | |
1140 | return err; | |
1141 | } | |
1142 | dsp_tics = poll * HZ / 8000; | |
1143 | if (dsp_tics * 8000 != poll * HZ) { | |
1144 | printk(KERN_INFO "mISDN_dsp: Cannot clock every %d " | |
1145 | "samples (0,125 ms). It is not a multiple of " | |
1146 | "%d HZ.\n", poll, HZ); | |
1147 | err = -EINVAL; | |
1148 | return err; | |
1149 | } | |
1150 | } else { | |
1151 | poll = 8; | |
1152 | while (poll <= MAX_POLL) { | |
400fd978 | 1153 | tics = (poll * HZ) / 8000; |
960366cf KK |
1154 | if (tics * 8000 == poll * HZ) { |
1155 | dsp_tics = tics; | |
1156 | dsp_poll = poll; | |
1157 | if (poll >= 64) | |
1158 | break; | |
1159 | } | |
1160 | poll++; | |
1161 | } | |
1162 | } | |
1163 | if (dsp_poll == 0) { | |
1164 | printk(KERN_INFO "mISDN_dsp: There is no multiple of kernel " | |
1165 | "clock that equals exactly the duration of 8-256 " | |
1166 | "samples. (Choose kernel clock speed like 100, 250, " | |
1167 | "300, 1000)\n"); | |
1168 | err = -EINVAL; | |
1169 | return err; | |
1170 | } | |
1171 | printk(KERN_INFO "mISDN_dsp: DSP clocks every %d samples. This equals " | |
1172 | "%d jiffies.\n", dsp_poll, dsp_tics); | |
1173 | ||
1174 | spin_lock_init(&dsp_lock); | |
1175 | INIT_LIST_HEAD(&dsp_ilist); | |
1176 | INIT_LIST_HEAD(&conf_ilist); | |
1177 | ||
1178 | /* init conversion tables */ | |
1179 | dsp_audio_generate_law_tables(); | |
eac74af9 KK |
1180 | dsp_silence = (dsp_options&DSP_OPT_ULAW) ? 0xff : 0x2a; |
1181 | dsp_audio_law_to_s32 = (dsp_options&DSP_OPT_ULAW) ? | |
1182 | dsp_audio_ulaw_to_s32 : dsp_audio_alaw_to_s32; | |
960366cf KK |
1183 | dsp_audio_generate_s2law_table(); |
1184 | dsp_audio_generate_seven(); | |
1185 | dsp_audio_generate_mix_table(); | |
1186 | if (dsp_options & DSP_OPT_ULAW) | |
1187 | dsp_audio_generate_ulaw_samples(); | |
1188 | dsp_audio_generate_volume_changes(); | |
1189 | ||
1190 | err = dsp_pipeline_module_init(); | |
1191 | if (err) { | |
1192 | printk(KERN_ERR "mISDN_dsp: Can't initialize pipeline, " | |
1193 | "error(%d)\n", err); | |
1194 | return err; | |
1195 | } | |
1196 | ||
1197 | err = mISDN_register_Bprotocol(&DSP); | |
1198 | if (err) { | |
1199 | printk(KERN_ERR "Can't register %s error(%d)\n", DSP.name, err); | |
1200 | return err; | |
1201 | } | |
1202 | ||
1203 | /* set sample timer */ | |
1204 | dsp_spl_tl.function = (void *)dsp_cmx_send; | |
1205 | dsp_spl_tl.data = 0; | |
1206 | init_timer(&dsp_spl_tl); | |
1207 | dsp_spl_tl.expires = jiffies + dsp_tics; | |
1208 | dsp_spl_jiffies = dsp_spl_tl.expires; | |
1209 | add_timer(&dsp_spl_tl); | |
1210 | ||
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | ||
1215 | static void dsp_cleanup(void) | |
1216 | { | |
1217 | mISDN_unregister_Bprotocol(&DSP); | |
1218 | ||
1219 | if (timer_pending(&dsp_spl_tl)) | |
1220 | del_timer(&dsp_spl_tl); | |
1221 | ||
1222 | if (!list_empty(&dsp_ilist)) { | |
1223 | printk(KERN_ERR "mISDN_dsp: Audio DSP object inst list not " | |
1224 | "empty.\n"); | |
1225 | } | |
1226 | if (!list_empty(&conf_ilist)) { | |
1227 | printk(KERN_ERR "mISDN_dsp: Conference list not empty. Not " | |
1228 | "all memory freed.\n"); | |
1229 | } | |
1230 | ||
1231 | dsp_pipeline_module_exit(); | |
1232 | } | |
1233 | ||
1234 | module_init(dsp_init); | |
1235 | module_exit(dsp_cleanup); | |
1236 |