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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 | * | |
af901ca1 | 113 | * Echo: Is generated by CMX and is used to check performance of hard and |
960366cf KK |
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 | |
25985edc | 118 | * data to/form upper layer may be swithed on/off individually without losing |
960366cf KK |
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. | |
25985edc LDM |
130 | * Not receiving is useful if only announcements are played. Not sending is |
131 | * useful if an answering machine records audio. Not sending and receiving is | |
132 | * useful during most states of the call. If supported by hardware, tones | |
960366cf KK |
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> | |
5a0e3ad6 | 157 | #include <linux/gfp.h> |
960366cf KK |
158 | #include <linux/mISDNif.h> |
159 | #include <linux/mISDNdsp.h> | |
160 | #include <linux/module.h> | |
161 | #include <linux/vmalloc.h> | |
162 | #include "core.h" | |
163 | #include "dsp.h" | |
164 | ||
5b834354 | 165 | static const char *mISDN_dsp_revision = "2.0"; |
960366cf KK |
166 | |
167 | static int debug; | |
168 | static int options; | |
169 | static int poll; | |
170 | static int dtmfthreshold = 100; | |
171 | ||
172 | MODULE_AUTHOR("Andreas Eversberg"); | |
173 | module_param(debug, uint, S_IRUGO | S_IWUSR); | |
174 | module_param(options, uint, S_IRUGO | S_IWUSR); | |
175 | module_param(poll, uint, S_IRUGO | S_IWUSR); | |
176 | module_param(dtmfthreshold, uint, S_IRUGO | S_IWUSR); | |
177 | MODULE_LICENSE("GPL"); | |
178 | ||
179 | /*int spinnest = 0;*/ | |
180 | ||
181 | spinlock_t dsp_lock; /* global dsp lock */ | |
182 | struct list_head dsp_ilist; | |
183 | struct list_head conf_ilist; | |
184 | int dsp_debug; | |
185 | int dsp_options; | |
186 | int dsp_poll, dsp_tics; | |
187 | ||
188 | /* check if rx may be turned off or must be turned on */ | |
189 | static void | |
190 | dsp_rx_off_member(struct dsp *dsp) | |
191 | { | |
192 | struct mISDN_ctrl_req cq; | |
193 | int rx_off = 1; | |
194 | ||
8dd2f36f AE |
195 | memset(&cq, 0, sizeof(cq)); |
196 | ||
960366cf KK |
197 | if (!dsp->features_rx_off) |
198 | return; | |
199 | ||
200 | /* not disabled */ | |
201 | if (!dsp->rx_disabled) | |
202 | rx_off = 0; | |
203 | /* software dtmf */ | |
204 | else if (dsp->dtmf.software) | |
205 | rx_off = 0; | |
206 | /* echo in software */ | |
bc138ec4 | 207 | else if (dsp->echo.software) |
960366cf KK |
208 | rx_off = 0; |
209 | /* bridge in software */ | |
bc138ec4 AE |
210 | else if (dsp->conf && dsp->conf->software) |
211 | rx_off = 0; | |
212 | /* data is not required by user space and not required | |
213 | * for echo dtmf detection, soft-echo, soft-bridging */ | |
960366cf KK |
214 | |
215 | if (rx_off == dsp->rx_is_off) | |
216 | return; | |
217 | ||
218 | if (!dsp->ch.peer) { | |
219 | if (dsp_debug & DEBUG_DSP_CORE) | |
220 | printk(KERN_DEBUG "%s: no peer, no rx_off\n", | |
221 | __func__); | |
222 | return; | |
223 | } | |
224 | cq.op = MISDN_CTRL_RX_OFF; | |
225 | cq.p1 = rx_off; | |
226 | if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { | |
227 | printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", | |
228 | __func__); | |
229 | return; | |
230 | } | |
231 | dsp->rx_is_off = rx_off; | |
232 | if (dsp_debug & DEBUG_DSP_CORE) | |
233 | printk(KERN_DEBUG "%s: %s set rx_off = %d\n", | |
234 | __func__, dsp->name, rx_off); | |
235 | } | |
236 | static void | |
237 | dsp_rx_off(struct dsp *dsp) | |
238 | { | |
239 | struct dsp_conf_member *member; | |
240 | ||
241 | if (dsp_options & DSP_OPT_NOHARDWARE) | |
242 | return; | |
243 | ||
244 | /* no conf */ | |
245 | if (!dsp->conf) { | |
246 | dsp_rx_off_member(dsp); | |
247 | return; | |
248 | } | |
249 | /* check all members in conf */ | |
250 | list_for_each_entry(member, &dsp->conf->mlist, list) { | |
251 | dsp_rx_off_member(member->dsp); | |
252 | } | |
253 | } | |
254 | ||
8dd2f36f AE |
255 | /* enable "fill empty" feature */ |
256 | static void | |
257 | dsp_fill_empty(struct dsp *dsp) | |
258 | { | |
259 | struct mISDN_ctrl_req cq; | |
260 | ||
261 | memset(&cq, 0, sizeof(cq)); | |
262 | ||
263 | if (!dsp->ch.peer) { | |
264 | if (dsp_debug & DEBUG_DSP_CORE) | |
265 | printk(KERN_DEBUG "%s: no peer, no fill_empty\n", | |
266 | __func__); | |
267 | return; | |
268 | } | |
269 | cq.op = MISDN_CTRL_FILL_EMPTY; | |
270 | cq.p1 = 1; | |
271 | if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { | |
272 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", | |
273 | __func__); | |
274 | return; | |
275 | } | |
276 | if (dsp_debug & DEBUG_DSP_CORE) | |
277 | printk(KERN_DEBUG "%s: %s set fill_empty = 1\n", | |
278 | __func__, dsp->name); | |
279 | } | |
280 | ||
960366cf KK |
281 | static int |
282 | dsp_control_req(struct dsp *dsp, struct mISDNhead *hh, struct sk_buff *skb) | |
283 | { | |
eac74af9 | 284 | struct sk_buff *nskb; |
960366cf KK |
285 | int ret = 0; |
286 | int cont; | |
287 | u8 *data; | |
288 | int len; | |
289 | ||
290 | if (skb->len < sizeof(int)) | |
291 | printk(KERN_ERR "%s: PH_CONTROL message too short\n", __func__); | |
292 | cont = *((int *)skb->data); | |
293 | len = skb->len - sizeof(int); | |
294 | data = skb->data + sizeof(int); | |
295 | ||
296 | switch (cont) { | |
297 | case DTMF_TONE_START: /* turn on DTMF */ | |
298 | if (dsp->hdlc) { | |
299 | ret = -EINVAL; | |
300 | break; | |
301 | } | |
302 | if (dsp_debug & DEBUG_DSP_CORE) | |
303 | printk(KERN_DEBUG "%s: start dtmf\n", __func__); | |
304 | if (len == sizeof(int)) { | |
c6a2e587 AE |
305 | if (dsp_debug & DEBUG_DSP_CORE) |
306 | printk(KERN_NOTICE "changing DTMF Threshold " | |
307 | "to %d\n", *((int *)data)); | |
960366cf KK |
308 | dsp->dtmf.treshold = (*(int *)data) * 10000; |
309 | } | |
b0579d74 | 310 | dsp->dtmf.enable = 1; |
960366cf KK |
311 | /* init goertzel */ |
312 | dsp_dtmf_goertzel_init(dsp); | |
313 | ||
314 | /* check dtmf hardware */ | |
315 | dsp_dtmf_hardware(dsp); | |
b5df5a5c | 316 | dsp_rx_off(dsp); |
960366cf KK |
317 | break; |
318 | case DTMF_TONE_STOP: /* turn off DTMF */ | |
319 | if (dsp_debug & DEBUG_DSP_CORE) | |
320 | printk(KERN_DEBUG "%s: stop dtmf\n", __func__); | |
b0579d74 | 321 | dsp->dtmf.enable = 0; |
960366cf KK |
322 | dsp->dtmf.hardware = 0; |
323 | dsp->dtmf.software = 0; | |
324 | break; | |
325 | case DSP_CONF_JOIN: /* join / update conference */ | |
326 | if (len < sizeof(int)) { | |
327 | ret = -EINVAL; | |
328 | break; | |
329 | } | |
330 | if (*((u32 *)data) == 0) | |
331 | goto conf_split; | |
332 | if (dsp_debug & DEBUG_DSP_CORE) | |
333 | printk(KERN_DEBUG "%s: join conference %d\n", | |
334 | __func__, *((u32 *)data)); | |
335 | ret = dsp_cmx_conf(dsp, *((u32 *)data)); | |
336 | /* dsp_cmx_hardware will also be called here */ | |
337 | dsp_rx_off(dsp); | |
338 | if (dsp_debug & DEBUG_DSP_CMX) | |
339 | dsp_cmx_debug(dsp); | |
340 | break; | |
341 | case DSP_CONF_SPLIT: /* remove from conference */ | |
342 | conf_split: | |
343 | if (dsp_debug & DEBUG_DSP_CORE) | |
344 | printk(KERN_DEBUG "%s: release conference\n", __func__); | |
345 | ret = dsp_cmx_conf(dsp, 0); | |
346 | /* dsp_cmx_hardware will also be called here */ | |
347 | if (dsp_debug & DEBUG_DSP_CMX) | |
348 | dsp_cmx_debug(dsp); | |
349 | dsp_rx_off(dsp); | |
350 | break; | |
351 | case DSP_TONE_PATT_ON: /* play tone */ | |
352 | if (dsp->hdlc) { | |
353 | ret = -EINVAL; | |
354 | break; | |
355 | } | |
356 | if (len < sizeof(int)) { | |
357 | ret = -EINVAL; | |
358 | break; | |
359 | } | |
360 | if (dsp_debug & DEBUG_DSP_CORE) | |
361 | printk(KERN_DEBUG "%s: turn tone 0x%x on\n", | |
362 | __func__, *((int *)skb->data)); | |
363 | ret = dsp_tone(dsp, *((int *)data)); | |
364 | if (!ret) { | |
365 | dsp_cmx_hardware(dsp->conf, dsp); | |
366 | dsp_rx_off(dsp); | |
367 | } | |
368 | if (!dsp->tone.tone) | |
369 | goto tone_off; | |
370 | break; | |
371 | case DSP_TONE_PATT_OFF: /* stop tone */ | |
372 | if (dsp->hdlc) { | |
373 | ret = -EINVAL; | |
374 | break; | |
375 | } | |
376 | if (dsp_debug & DEBUG_DSP_CORE) | |
377 | printk(KERN_DEBUG "%s: turn tone off\n", __func__); | |
378 | dsp_tone(dsp, 0); | |
379 | dsp_cmx_hardware(dsp->conf, dsp); | |
380 | dsp_rx_off(dsp); | |
381 | /* reset tx buffers (user space data) */ | |
382 | tone_off: | |
383 | dsp->rx_W = 0; | |
384 | dsp->rx_R = 0; | |
385 | break; | |
386 | case DSP_VOL_CHANGE_TX: /* change volume */ | |
387 | if (dsp->hdlc) { | |
388 | ret = -EINVAL; | |
389 | break; | |
390 | } | |
391 | if (len < sizeof(int)) { | |
392 | ret = -EINVAL; | |
393 | break; | |
394 | } | |
395 | dsp->tx_volume = *((int *)data); | |
396 | if (dsp_debug & DEBUG_DSP_CORE) | |
397 | printk(KERN_DEBUG "%s: change tx vol to %d\n", | |
398 | __func__, dsp->tx_volume); | |
399 | dsp_cmx_hardware(dsp->conf, dsp); | |
400 | dsp_dtmf_hardware(dsp); | |
401 | dsp_rx_off(dsp); | |
402 | break; | |
403 | case DSP_VOL_CHANGE_RX: /* change volume */ | |
404 | if (dsp->hdlc) { | |
405 | ret = -EINVAL; | |
406 | break; | |
407 | } | |
408 | if (len < sizeof(int)) { | |
409 | ret = -EINVAL; | |
410 | break; | |
411 | } | |
412 | dsp->rx_volume = *((int *)data); | |
413 | if (dsp_debug & DEBUG_DSP_CORE) | |
414 | printk(KERN_DEBUG "%s: change rx vol to %d\n", | |
415 | __func__, dsp->tx_volume); | |
416 | dsp_cmx_hardware(dsp->conf, dsp); | |
417 | dsp_dtmf_hardware(dsp); | |
418 | dsp_rx_off(dsp); | |
419 | break; | |
420 | case DSP_ECHO_ON: /* enable echo */ | |
bc138ec4 | 421 | dsp->echo.software = 1; /* soft echo */ |
960366cf KK |
422 | if (dsp_debug & DEBUG_DSP_CORE) |
423 | printk(KERN_DEBUG "%s: enable cmx-echo\n", __func__); | |
424 | dsp_cmx_hardware(dsp->conf, dsp); | |
425 | dsp_rx_off(dsp); | |
426 | if (dsp_debug & DEBUG_DSP_CMX) | |
427 | dsp_cmx_debug(dsp); | |
428 | break; | |
429 | case DSP_ECHO_OFF: /* disable echo */ | |
bc138ec4 AE |
430 | dsp->echo.software = 0; |
431 | dsp->echo.hardware = 0; | |
960366cf KK |
432 | if (dsp_debug & DEBUG_DSP_CORE) |
433 | printk(KERN_DEBUG "%s: disable cmx-echo\n", __func__); | |
434 | dsp_cmx_hardware(dsp->conf, dsp); | |
435 | dsp_rx_off(dsp); | |
436 | if (dsp_debug & DEBUG_DSP_CMX) | |
437 | dsp_cmx_debug(dsp); | |
438 | break; | |
439 | case DSP_RECEIVE_ON: /* enable receive to user space */ | |
440 | if (dsp_debug & DEBUG_DSP_CORE) | |
441 | printk(KERN_DEBUG "%s: enable receive to user " | |
442 | "space\n", __func__); | |
443 | dsp->rx_disabled = 0; | |
444 | dsp_rx_off(dsp); | |
445 | break; | |
446 | case DSP_RECEIVE_OFF: /* disable receive to user space */ | |
447 | if (dsp_debug & DEBUG_DSP_CORE) | |
448 | printk(KERN_DEBUG "%s: disable receive to " | |
449 | "user space\n", __func__); | |
450 | dsp->rx_disabled = 1; | |
451 | dsp_rx_off(dsp); | |
452 | break; | |
453 | case DSP_MIX_ON: /* enable mixing of tx data */ | |
454 | if (dsp->hdlc) { | |
455 | ret = -EINVAL; | |
456 | break; | |
457 | } | |
458 | if (dsp_debug & DEBUG_DSP_CORE) | |
459 | printk(KERN_DEBUG "%s: enable mixing of " | |
460 | "tx-data with conf mebers\n", __func__); | |
461 | dsp->tx_mix = 1; | |
462 | dsp_cmx_hardware(dsp->conf, dsp); | |
463 | dsp_rx_off(dsp); | |
464 | if (dsp_debug & DEBUG_DSP_CMX) | |
465 | dsp_cmx_debug(dsp); | |
466 | break; | |
467 | case DSP_MIX_OFF: /* disable mixing of tx data */ | |
468 | if (dsp->hdlc) { | |
469 | ret = -EINVAL; | |
470 | break; | |
471 | } | |
472 | if (dsp_debug & DEBUG_DSP_CORE) | |
473 | printk(KERN_DEBUG "%s: disable mixing of " | |
474 | "tx-data with conf mebers\n", __func__); | |
475 | dsp->tx_mix = 0; | |
476 | dsp_cmx_hardware(dsp->conf, dsp); | |
477 | dsp_rx_off(dsp); | |
478 | if (dsp_debug & DEBUG_DSP_CMX) | |
479 | dsp_cmx_debug(dsp); | |
480 | break; | |
481 | case DSP_TXDATA_ON: /* enable txdata */ | |
482 | dsp->tx_data = 1; | |
483 | if (dsp_debug & DEBUG_DSP_CORE) | |
484 | printk(KERN_DEBUG "%s: enable tx-data\n", __func__); | |
485 | dsp_cmx_hardware(dsp->conf, dsp); | |
486 | dsp_rx_off(dsp); | |
487 | if (dsp_debug & DEBUG_DSP_CMX) | |
488 | dsp_cmx_debug(dsp); | |
489 | break; | |
490 | case DSP_TXDATA_OFF: /* disable txdata */ | |
491 | dsp->tx_data = 0; | |
492 | if (dsp_debug & DEBUG_DSP_CORE) | |
493 | printk(KERN_DEBUG "%s: disable tx-data\n", __func__); | |
494 | dsp_cmx_hardware(dsp->conf, dsp); | |
495 | dsp_rx_off(dsp); | |
496 | if (dsp_debug & DEBUG_DSP_CMX) | |
497 | dsp_cmx_debug(dsp); | |
498 | break; | |
499 | case DSP_DELAY: /* use delay algorithm instead of dynamic | |
500 | jitter algorithm */ | |
501 | if (dsp->hdlc) { | |
502 | ret = -EINVAL; | |
503 | break; | |
504 | } | |
505 | if (len < sizeof(int)) { | |
506 | ret = -EINVAL; | |
507 | break; | |
508 | } | |
509 | dsp->cmx_delay = (*((int *)data)) << 3; | |
19af5cdb | 510 | /* milliseconds to samples */ |
960366cf KK |
511 | if (dsp->cmx_delay >= (CMX_BUFF_HALF>>1)) |
512 | /* clip to half of maximum usable buffer | |
513 | (half of half buffer) */ | |
514 | dsp->cmx_delay = (CMX_BUFF_HALF>>1) - 1; | |
515 | if (dsp_debug & DEBUG_DSP_CORE) | |
516 | printk(KERN_DEBUG "%s: use delay algorithm to " | |
517 | "compensate jitter (%d samples)\n", | |
518 | __func__, dsp->cmx_delay); | |
519 | break; | |
520 | case DSP_JITTER: /* use dynamic jitter algorithm instead of | |
521 | delay algorithm */ | |
522 | if (dsp->hdlc) { | |
523 | ret = -EINVAL; | |
524 | break; | |
525 | } | |
526 | dsp->cmx_delay = 0; | |
527 | if (dsp_debug & DEBUG_DSP_CORE) | |
528 | printk(KERN_DEBUG "%s: use jitter algorithm to " | |
529 | "compensate jitter\n", __func__); | |
530 | break; | |
531 | case DSP_TX_DEJITTER: /* use dynamic jitter algorithm for tx-buffer */ | |
532 | if (dsp->hdlc) { | |
533 | ret = -EINVAL; | |
534 | break; | |
535 | } | |
536 | dsp->tx_dejitter = 1; | |
537 | if (dsp_debug & DEBUG_DSP_CORE) | |
538 | printk(KERN_DEBUG "%s: use dejitter on TX " | |
539 | "buffer\n", __func__); | |
540 | break; | |
541 | case DSP_TX_DEJ_OFF: /* use tx-buffer without dejittering*/ | |
542 | if (dsp->hdlc) { | |
543 | ret = -EINVAL; | |
544 | break; | |
545 | } | |
546 | dsp->tx_dejitter = 0; | |
547 | if (dsp_debug & DEBUG_DSP_CORE) | |
548 | printk(KERN_DEBUG "%s: use TX buffer without " | |
549 | "dejittering\n", __func__); | |
550 | break; | |
551 | case DSP_PIPELINE_CFG: | |
552 | if (dsp->hdlc) { | |
553 | ret = -EINVAL; | |
554 | break; | |
555 | } | |
556 | if (len > 0 && ((char *)data)[len - 1]) { | |
557 | printk(KERN_DEBUG "%s: pipeline config string " | |
558 | "is not NULL terminated!\n", __func__); | |
559 | ret = -EINVAL; | |
560 | } else { | |
561 | dsp->pipeline.inuse = 1; | |
562 | dsp_cmx_hardware(dsp->conf, dsp); | |
563 | ret = dsp_pipeline_build(&dsp->pipeline, | |
eac74af9 | 564 | len > 0 ? data : NULL); |
960366cf KK |
565 | dsp_cmx_hardware(dsp->conf, dsp); |
566 | dsp_rx_off(dsp); | |
567 | } | |
568 | break; | |
569 | case DSP_BF_ENABLE_KEY: /* turn blowfish on */ | |
570 | if (dsp->hdlc) { | |
571 | ret = -EINVAL; | |
572 | break; | |
573 | } | |
574 | if (len < 4 || len > 56) { | |
575 | ret = -EINVAL; | |
576 | break; | |
577 | } | |
578 | if (dsp_debug & DEBUG_DSP_CORE) | |
579 | printk(KERN_DEBUG "%s: turn blowfish on (key " | |
580 | "not shown)\n", __func__); | |
581 | ret = dsp_bf_init(dsp, (u8 *)data, len); | |
582 | /* set new cont */ | |
583 | if (!ret) | |
584 | cont = DSP_BF_ACCEPT; | |
585 | else | |
586 | cont = DSP_BF_REJECT; | |
587 | /* send indication if it worked to set it */ | |
588 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, MISDN_ID_ANY, | |
589 | sizeof(int), &cont, GFP_ATOMIC); | |
590 | if (nskb) { | |
591 | if (dsp->up) { | |
592 | if (dsp->up->send(dsp->up, nskb)) | |
593 | dev_kfree_skb(nskb); | |
594 | } else | |
595 | dev_kfree_skb(nskb); | |
596 | } | |
597 | if (!ret) { | |
598 | dsp_cmx_hardware(dsp->conf, dsp); | |
599 | dsp_dtmf_hardware(dsp); | |
600 | dsp_rx_off(dsp); | |
601 | } | |
602 | break; | |
603 | case DSP_BF_DISABLE: /* turn blowfish off */ | |
604 | if (dsp->hdlc) { | |
605 | ret = -EINVAL; | |
606 | break; | |
607 | } | |
608 | if (dsp_debug & DEBUG_DSP_CORE) | |
609 | printk(KERN_DEBUG "%s: turn blowfish off\n", __func__); | |
610 | dsp_bf_cleanup(dsp); | |
611 | dsp_cmx_hardware(dsp->conf, dsp); | |
612 | dsp_dtmf_hardware(dsp); | |
613 | dsp_rx_off(dsp); | |
614 | break; | |
615 | default: | |
616 | if (dsp_debug & DEBUG_DSP_CORE) | |
617 | printk(KERN_DEBUG "%s: ctrl req %x unhandled\n", | |
618 | __func__, cont); | |
619 | ret = -EINVAL; | |
620 | } | |
621 | return ret; | |
622 | } | |
623 | ||
624 | static void | |
625 | get_features(struct mISDNchannel *ch) | |
626 | { | |
627 | struct dsp *dsp = container_of(ch, struct dsp, ch); | |
628 | struct mISDN_ctrl_req cq; | |
629 | ||
960366cf KK |
630 | if (!ch->peer) { |
631 | if (dsp_debug & DEBUG_DSP_CORE) | |
632 | printk(KERN_DEBUG "%s: no peer, no features\n", | |
633 | __func__); | |
634 | return; | |
635 | } | |
636 | memset(&cq, 0, sizeof(cq)); | |
637 | cq.op = MISDN_CTRL_GETOP; | |
638 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq) < 0) { | |
639 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", | |
640 | __func__); | |
641 | return; | |
642 | } | |
643 | if (cq.op & MISDN_CTRL_RX_OFF) | |
644 | dsp->features_rx_off = 1; | |
8dd2f36f AE |
645 | if (cq.op & MISDN_CTRL_FILL_EMPTY) |
646 | dsp->features_fill_empty = 1; | |
647 | if (dsp_options & DSP_OPT_NOHARDWARE) | |
648 | return; | |
960366cf KK |
649 | if ((cq.op & MISDN_CTRL_HW_FEATURES_OP)) { |
650 | cq.op = MISDN_CTRL_HW_FEATURES; | |
651 | *((u_long *)&cq.p1) = (u_long)&dsp->features; | |
652 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq)) { | |
653 | printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", | |
654 | __func__); | |
655 | } | |
656 | } else | |
657 | if (dsp_debug & DEBUG_DSP_CORE) | |
658 | printk(KERN_DEBUG "%s: features not supported for %s\n", | |
659 | __func__, dsp->name); | |
660 | } | |
661 | ||
662 | static int | |
663 | dsp_function(struct mISDNchannel *ch, struct sk_buff *skb) | |
664 | { | |
b5df5a5c | 665 | struct dsp *dsp = container_of(ch, struct dsp, ch); |
960366cf KK |
666 | struct mISDNhead *hh; |
667 | int ret = 0; | |
b5df5a5c | 668 | u8 *digits = NULL; |
960366cf KK |
669 | u_long flags; |
670 | ||
671 | hh = mISDN_HEAD_P(skb); | |
672 | switch (hh->prim) { | |
673 | /* FROM DOWN */ | |
674 | case (PH_DATA_CNF): | |
675 | dsp->data_pending = 0; | |
676 | /* trigger next hdlc frame, if any */ | |
677 | if (dsp->hdlc) { | |
678 | spin_lock_irqsave(&dsp_lock, flags); | |
679 | if (dsp->b_active) | |
680 | schedule_work(&dsp->workq); | |
681 | spin_unlock_irqrestore(&dsp_lock, flags); | |
682 | } | |
683 | break; | |
684 | case (PH_DATA_IND): | |
685 | case (DL_DATA_IND): | |
686 | if (skb->len < 1) { | |
687 | ret = -EINVAL; | |
688 | break; | |
689 | } | |
690 | if (dsp->rx_is_off) { | |
691 | if (dsp_debug & DEBUG_DSP_CORE) | |
692 | printk(KERN_DEBUG "%s: rx-data during rx_off" | |
693 | " for %s\n", | |
694 | __func__, dsp->name); | |
695 | } | |
696 | if (dsp->hdlc) { | |
697 | /* hdlc */ | |
698 | spin_lock_irqsave(&dsp_lock, flags); | |
699 | dsp_cmx_hdlc(dsp, skb); | |
700 | spin_unlock_irqrestore(&dsp_lock, flags); | |
701 | if (dsp->rx_disabled) { | |
702 | /* if receive is not allowed */ | |
703 | break; | |
704 | } | |
705 | hh->prim = DL_DATA_IND; | |
706 | if (dsp->up) | |
707 | return dsp->up->send(dsp->up, skb); | |
708 | break; | |
709 | } | |
710 | ||
ba3af34e AE |
711 | spin_lock_irqsave(&dsp_lock, flags); |
712 | ||
960366cf KK |
713 | /* decrypt if enabled */ |
714 | if (dsp->bf_enable) | |
715 | dsp_bf_decrypt(dsp, skb->data, skb->len); | |
716 | /* pipeline */ | |
717 | if (dsp->pipeline.inuse) | |
718 | dsp_pipeline_process_rx(&dsp->pipeline, skb->data, | |
7cfa153d | 719 | skb->len, hh->id); |
960366cf KK |
720 | /* change volume if requested */ |
721 | if (dsp->rx_volume) | |
722 | dsp_change_volume(skb, dsp->rx_volume); | |
960366cf KK |
723 | /* check if dtmf soft decoding is turned on */ |
724 | if (dsp->dtmf.software) { | |
725 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, | |
eac74af9 | 726 | skb->len, (dsp_options&DSP_OPT_ULAW) ? 1 : 0); |
b5df5a5c AE |
727 | } |
728 | /* we need to process receive data if software */ | |
bc138ec4 | 729 | if (dsp->conf && dsp->conf->software) { |
b5df5a5c AE |
730 | /* process data from card at cmx */ |
731 | dsp_cmx_receive(dsp, skb); | |
732 | } | |
733 | ||
734 | spin_unlock_irqrestore(&dsp_lock, flags); | |
735 | ||
736 | /* send dtmf result, if any */ | |
737 | if (digits) { | |
960366cf | 738 | while (*digits) { |
b5df5a5c | 739 | int k; |
bb68b1d9 | 740 | struct sk_buff *nskb; |
960366cf KK |
741 | if (dsp_debug & DEBUG_DSP_DTMF) |
742 | printk(KERN_DEBUG "%s: digit" | |
743 | "(%c) to layer %s\n", | |
744 | __func__, *digits, dsp->name); | |
b5df5a5c | 745 | k = *digits | DTMF_TONE_VAL; |
960366cf | 746 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, |
b5df5a5c AE |
747 | MISDN_ID_ANY, sizeof(int), &k, |
748 | GFP_ATOMIC); | |
960366cf KK |
749 | if (nskb) { |
750 | if (dsp->up) { | |
751 | if (dsp->up->send( | |
752 | dsp->up, nskb)) | |
b5df5a5c | 753 | dev_kfree_skb(nskb); |
960366cf KK |
754 | } else |
755 | dev_kfree_skb(nskb); | |
756 | } | |
757 | digits++; | |
758 | } | |
759 | } | |
960366cf KK |
760 | if (dsp->rx_disabled) { |
761 | /* if receive is not allowed */ | |
762 | break; | |
763 | } | |
764 | hh->prim = DL_DATA_IND; | |
765 | if (dsp->up) | |
766 | return dsp->up->send(dsp->up, skb); | |
767 | break; | |
768 | case (PH_CONTROL_IND): | |
769 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) | |
770 | printk(KERN_DEBUG "%s: PH_CONTROL INDICATION " | |
771 | "received: %x (len %d) %s\n", __func__, | |
772 | hh->id, skb->len, dsp->name); | |
773 | switch (hh->id) { | |
774 | case (DTMF_HFC_COEF): /* getting coefficients */ | |
775 | if (!dsp->dtmf.hardware) { | |
776 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) | |
777 | printk(KERN_DEBUG "%s: ignoring DTMF " | |
778 | "coefficients from HFC\n", | |
779 | __func__); | |
780 | break; | |
781 | } | |
782 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, | |
783 | skb->len, 2); | |
784 | while (*digits) { | |
785 | int k; | |
786 | struct sk_buff *nskb; | |
787 | if (dsp_debug & DEBUG_DSP_DTMF) | |
788 | printk(KERN_DEBUG "%s: digit" | |
789 | "(%c) to layer %s\n", | |
790 | __func__, *digits, dsp->name); | |
791 | k = *digits | DTMF_TONE_VAL; | |
792 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, | |
793 | MISDN_ID_ANY, sizeof(int), &k, | |
794 | GFP_ATOMIC); | |
795 | if (nskb) { | |
796 | if (dsp->up) { | |
797 | if (dsp->up->send( | |
798 | dsp->up, nskb)) | |
b5df5a5c | 799 | dev_kfree_skb(nskb); |
960366cf KK |
800 | } else |
801 | dev_kfree_skb(nskb); | |
802 | } | |
803 | digits++; | |
804 | } | |
805 | break; | |
806 | case (HFC_VOL_CHANGE_TX): /* change volume */ | |
807 | if (skb->len != sizeof(int)) { | |
808 | ret = -EINVAL; | |
809 | break; | |
810 | } | |
811 | spin_lock_irqsave(&dsp_lock, flags); | |
812 | dsp->tx_volume = *((int *)skb->data); | |
813 | if (dsp_debug & DEBUG_DSP_CORE) | |
814 | printk(KERN_DEBUG "%s: change tx volume to " | |
815 | "%d\n", __func__, dsp->tx_volume); | |
816 | dsp_cmx_hardware(dsp->conf, dsp); | |
817 | dsp_dtmf_hardware(dsp); | |
818 | dsp_rx_off(dsp); | |
819 | spin_unlock_irqrestore(&dsp_lock, flags); | |
820 | break; | |
821 | default: | |
822 | if (dsp_debug & DEBUG_DSP_CORE) | |
823 | printk(KERN_DEBUG "%s: ctrl ind %x unhandled " | |
824 | "%s\n", __func__, hh->id, dsp->name); | |
825 | ret = -EINVAL; | |
826 | } | |
827 | break; | |
828 | case (PH_ACTIVATE_IND): | |
829 | case (PH_ACTIVATE_CNF): | |
830 | if (dsp_debug & DEBUG_DSP_CORE) | |
831 | printk(KERN_DEBUG "%s: b_channel is now active %s\n", | |
832 | __func__, dsp->name); | |
833 | /* bchannel now active */ | |
834 | spin_lock_irqsave(&dsp_lock, flags); | |
835 | dsp->b_active = 1; | |
836 | dsp->data_pending = 0; | |
837 | dsp->rx_init = 1; | |
838 | /* rx_W and rx_R will be adjusted on first frame */ | |
839 | dsp->rx_W = 0; | |
840 | dsp->rx_R = 0; | |
841 | memset(dsp->rx_buff, 0, sizeof(dsp->rx_buff)); | |
842 | dsp_cmx_hardware(dsp->conf, dsp); | |
843 | dsp_dtmf_hardware(dsp); | |
844 | dsp_rx_off(dsp); | |
845 | spin_unlock_irqrestore(&dsp_lock, flags); | |
846 | if (dsp_debug & DEBUG_DSP_CORE) | |
847 | printk(KERN_DEBUG "%s: done with activation, sending " | |
848 | "confirm to user space. %s\n", __func__, | |
849 | dsp->name); | |
850 | /* send activation to upper layer */ | |
851 | hh->prim = DL_ESTABLISH_CNF; | |
852 | if (dsp->up) | |
853 | return dsp->up->send(dsp->up, skb); | |
854 | break; | |
855 | case (PH_DEACTIVATE_IND): | |
856 | case (PH_DEACTIVATE_CNF): | |
857 | if (dsp_debug & DEBUG_DSP_CORE) | |
858 | printk(KERN_DEBUG "%s: b_channel is now inactive %s\n", | |
859 | __func__, dsp->name); | |
860 | /* bchannel now inactive */ | |
861 | spin_lock_irqsave(&dsp_lock, flags); | |
862 | dsp->b_active = 0; | |
863 | dsp->data_pending = 0; | |
864 | dsp_cmx_hardware(dsp->conf, dsp); | |
865 | dsp_rx_off(dsp); | |
866 | spin_unlock_irqrestore(&dsp_lock, flags); | |
867 | hh->prim = DL_RELEASE_CNF; | |
868 | if (dsp->up) | |
869 | return dsp->up->send(dsp->up, skb); | |
870 | break; | |
871 | /* FROM UP */ | |
872 | case (DL_DATA_REQ): | |
873 | case (PH_DATA_REQ): | |
874 | if (skb->len < 1) { | |
875 | ret = -EINVAL; | |
876 | break; | |
877 | } | |
878 | if (dsp->hdlc) { | |
879 | /* hdlc */ | |
e4cce225 PS |
880 | if (!dsp->b_active) { |
881 | ret = -EIO; | |
882 | break; | |
960366cf | 883 | } |
e4cce225 PS |
884 | hh->prim = PH_DATA_REQ; |
885 | spin_lock_irqsave(&dsp_lock, flags); | |
886 | skb_queue_tail(&dsp->sendq, skb); | |
887 | schedule_work(&dsp->workq); | |
960366cf KK |
888 | spin_unlock_irqrestore(&dsp_lock, flags); |
889 | return 0; | |
890 | } | |
891 | /* send data to tx-buffer (if no tone is played) */ | |
892 | if (!dsp->tone.tone) { | |
893 | spin_lock_irqsave(&dsp_lock, flags); | |
894 | dsp_cmx_transmit(dsp, skb); | |
895 | spin_unlock_irqrestore(&dsp_lock, flags); | |
896 | } | |
897 | break; | |
898 | case (PH_CONTROL_REQ): | |
899 | spin_lock_irqsave(&dsp_lock, flags); | |
900 | ret = dsp_control_req(dsp, hh, skb); | |
901 | spin_unlock_irqrestore(&dsp_lock, flags); | |
902 | break; | |
903 | case (DL_ESTABLISH_REQ): | |
904 | case (PH_ACTIVATE_REQ): | |
905 | if (dsp_debug & DEBUG_DSP_CORE) | |
906 | printk(KERN_DEBUG "%s: activating b_channel %s\n", | |
907 | __func__, dsp->name); | |
908 | if (dsp->dtmf.hardware || dsp->dtmf.software) | |
909 | dsp_dtmf_goertzel_init(dsp); | |
910 | get_features(ch); | |
8dd2f36f AE |
911 | /* enable fill_empty feature */ |
912 | if (dsp->features_fill_empty) | |
913 | dsp_fill_empty(dsp); | |
960366cf KK |
914 | /* send ph_activate */ |
915 | hh->prim = PH_ACTIVATE_REQ; | |
916 | if (ch->peer) | |
917 | return ch->recv(ch->peer, skb); | |
918 | break; | |
919 | case (DL_RELEASE_REQ): | |
920 | case (PH_DEACTIVATE_REQ): | |
921 | if (dsp_debug & DEBUG_DSP_CORE) | |
922 | printk(KERN_DEBUG "%s: releasing b_channel %s\n", | |
923 | __func__, dsp->name); | |
924 | spin_lock_irqsave(&dsp_lock, flags); | |
925 | dsp->tone.tone = 0; | |
926 | dsp->tone.hardware = 0; | |
927 | dsp->tone.software = 0; | |
928 | if (timer_pending(&dsp->tone.tl)) | |
929 | del_timer(&dsp->tone.tl); | |
930 | if (dsp->conf) | |
931 | dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be | |
932 | called here */ | |
933 | skb_queue_purge(&dsp->sendq); | |
934 | spin_unlock_irqrestore(&dsp_lock, flags); | |
935 | hh->prim = PH_DEACTIVATE_REQ; | |
936 | if (ch->peer) | |
937 | return ch->recv(ch->peer, skb); | |
938 | break; | |
939 | default: | |
940 | if (dsp_debug & DEBUG_DSP_CORE) | |
941 | printk(KERN_DEBUG "%s: msg %x unhandled %s\n", | |
942 | __func__, hh->prim, dsp->name); | |
943 | ret = -EINVAL; | |
944 | } | |
945 | if (!ret) | |
946 | dev_kfree_skb(skb); | |
947 | return ret; | |
948 | } | |
949 | ||
950 | static int | |
951 | dsp_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
952 | { | |
953 | struct dsp *dsp = container_of(ch, struct dsp, ch); | |
954 | u_long flags; | |
955 | int err = 0; | |
956 | ||
957 | if (debug & DEBUG_DSP_CTRL) | |
eac74af9 | 958 | printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd); |
960366cf KK |
959 | |
960 | switch (cmd) { | |
961 | case OPEN_CHANNEL: | |
962 | break; | |
963 | case CLOSE_CHANNEL: | |
964 | if (dsp->ch.peer) | |
965 | dsp->ch.peer->ctrl(dsp->ch.peer, CLOSE_CHANNEL, NULL); | |
966 | ||
967 | /* wait until workqueue has finished, | |
968 | * must lock here, or we may hit send-process currently | |
969 | * queueing. */ | |
970 | spin_lock_irqsave(&dsp_lock, flags); | |
971 | dsp->b_active = 0; | |
972 | spin_unlock_irqrestore(&dsp_lock, flags); | |
973 | /* MUST not be locked, because it waits until queue is done. */ | |
974 | cancel_work_sync(&dsp->workq); | |
975 | spin_lock_irqsave(&dsp_lock, flags); | |
976 | if (timer_pending(&dsp->tone.tl)) | |
977 | del_timer(&dsp->tone.tl); | |
978 | skb_queue_purge(&dsp->sendq); | |
979 | if (dsp_debug & DEBUG_DSP_CTRL) | |
980 | printk(KERN_DEBUG "%s: releasing member %s\n", | |
981 | __func__, dsp->name); | |
982 | dsp->b_active = 0; | |
983 | dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be called | |
984 | here */ | |
985 | dsp_pipeline_destroy(&dsp->pipeline); | |
986 | ||
987 | if (dsp_debug & DEBUG_DSP_CTRL) | |
988 | printk(KERN_DEBUG "%s: remove & destroy object %s\n", | |
989 | __func__, dsp->name); | |
990 | list_del(&dsp->list); | |
991 | spin_unlock_irqrestore(&dsp_lock, flags); | |
992 | ||
993 | if (dsp_debug & DEBUG_DSP_CTRL) | |
994 | printk(KERN_DEBUG "%s: dsp instance released\n", | |
995 | __func__); | |
996 | vfree(dsp); | |
997 | module_put(THIS_MODULE); | |
998 | break; | |
999 | } | |
1000 | return err; | |
1001 | } | |
1002 | ||
1003 | static void | |
1004 | dsp_send_bh(struct work_struct *work) | |
1005 | { | |
1006 | struct dsp *dsp = container_of(work, struct dsp, workq); | |
1007 | struct sk_buff *skb; | |
1008 | struct mISDNhead *hh; | |
1009 | ||
1010 | if (dsp->hdlc && dsp->data_pending) | |
1011 | return; /* wait until data has been acknowledged */ | |
1012 | ||
1013 | /* send queued data */ | |
1014 | while ((skb = skb_dequeue(&dsp->sendq))) { | |
1015 | /* in locked date, we must have still data in queue */ | |
1016 | if (dsp->data_pending) { | |
1017 | if (dsp_debug & DEBUG_DSP_CORE) | |
1018 | printk(KERN_DEBUG "%s: fifo full %s, this is " | |
1019 | "no bug!\n", __func__, dsp->name); | |
1020 | /* flush transparent data, if not acked */ | |
1021 | dev_kfree_skb(skb); | |
1022 | continue; | |
1023 | } | |
1024 | hh = mISDN_HEAD_P(skb); | |
1025 | if (hh->prim == DL_DATA_REQ) { | |
1026 | /* send packet up */ | |
1027 | if (dsp->up) { | |
1028 | if (dsp->up->send(dsp->up, skb)) | |
1029 | dev_kfree_skb(skb); | |
1030 | } else | |
1031 | dev_kfree_skb(skb); | |
1032 | } else { | |
1033 | /* send packet down */ | |
1034 | if (dsp->ch.peer) { | |
1035 | dsp->data_pending = 1; | |
1036 | if (dsp->ch.recv(dsp->ch.peer, skb)) { | |
1037 | dev_kfree_skb(skb); | |
1038 | dsp->data_pending = 0; | |
1039 | } | |
1040 | } else | |
1041 | dev_kfree_skb(skb); | |
1042 | } | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | static int | |
1047 | dspcreate(struct channel_req *crq) | |
1048 | { | |
1049 | struct dsp *ndsp; | |
1050 | u_long flags; | |
1051 | ||
1052 | if (crq->protocol != ISDN_P_B_L2DSP | |
1053 | && crq->protocol != ISDN_P_B_L2DSPHDLC) | |
1054 | return -EPROTONOSUPPORT; | |
1055 | ndsp = vmalloc(sizeof(struct dsp)); | |
1056 | if (!ndsp) { | |
1057 | printk(KERN_ERR "%s: vmalloc struct dsp failed\n", __func__); | |
1058 | return -ENOMEM; | |
1059 | } | |
1060 | memset(ndsp, 0, sizeof(struct dsp)); | |
1061 | if (dsp_debug & DEBUG_DSP_CTRL) | |
1062 | printk(KERN_DEBUG "%s: creating new dsp instance\n", __func__); | |
1063 | ||
1064 | /* default enabled */ | |
1065 | INIT_WORK(&ndsp->workq, (void *)dsp_send_bh); | |
1066 | skb_queue_head_init(&ndsp->sendq); | |
1067 | ndsp->ch.send = dsp_function; | |
1068 | ndsp->ch.ctrl = dsp_ctrl; | |
1069 | ndsp->up = crq->ch; | |
1070 | crq->ch = &ndsp->ch; | |
1071 | if (crq->protocol == ISDN_P_B_L2DSP) { | |
1072 | crq->protocol = ISDN_P_B_RAW; | |
1073 | ndsp->hdlc = 0; | |
1074 | } else { | |
1075 | crq->protocol = ISDN_P_B_HDLC; | |
1076 | ndsp->hdlc = 1; | |
1077 | } | |
1078 | if (!try_module_get(THIS_MODULE)) | |
1079 | printk(KERN_WARNING "%s:cannot get module\n", | |
1080 | __func__); | |
1081 | ||
1082 | sprintf(ndsp->name, "DSP_C%x(0x%p)", | |
1083 | ndsp->up->st->dev->id + 1, ndsp); | |
1084 | /* set frame size to start */ | |
1085 | ndsp->features.hfc_id = -1; /* current PCM id */ | |
1086 | ndsp->features.pcm_id = -1; /* current PCM id */ | |
1087 | ndsp->pcm_slot_rx = -1; /* current CPM slot */ | |
1088 | ndsp->pcm_slot_tx = -1; | |
1089 | ndsp->pcm_bank_rx = -1; | |
1090 | ndsp->pcm_bank_tx = -1; | |
1091 | ndsp->hfc_conf = -1; /* current conference number */ | |
1092 | /* set tone timer */ | |
1093 | ndsp->tone.tl.function = (void *)dsp_tone_timeout; | |
1094 | ndsp->tone.tl.data = (long) ndsp; | |
1095 | init_timer(&ndsp->tone.tl); | |
1096 | ||
1097 | if (dtmfthreshold < 20 || dtmfthreshold > 500) | |
1098 | dtmfthreshold = 200; | |
1099 | ndsp->dtmf.treshold = dtmfthreshold*10000; | |
1100 | ||
1101 | /* init pipeline append to list */ | |
1102 | spin_lock_irqsave(&dsp_lock, flags); | |
1103 | dsp_pipeline_init(&ndsp->pipeline); | |
1104 | list_add_tail(&ndsp->list, &dsp_ilist); | |
1105 | spin_unlock_irqrestore(&dsp_lock, flags); | |
1106 | ||
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | ||
1111 | static struct Bprotocol DSP = { | |
1112 | .Bprotocols = (1 << (ISDN_P_B_L2DSP & ISDN_P_B_MASK)) | |
1113 | | (1 << (ISDN_P_B_L2DSPHDLC & ISDN_P_B_MASK)), | |
1114 | .name = "dsp", | |
1115 | .create = dspcreate | |
1116 | }; | |
1117 | ||
3d956d1d | 1118 | static int __init dsp_init(void) |
960366cf KK |
1119 | { |
1120 | int err; | |
1121 | int tics; | |
1122 | ||
1123 | printk(KERN_INFO "DSP modul %s\n", mISDN_dsp_revision); | |
1124 | ||
1125 | dsp_options = options; | |
1126 | dsp_debug = debug; | |
1127 | ||
1128 | /* set packet size */ | |
1129 | dsp_poll = poll; | |
1130 | if (dsp_poll) { | |
1131 | if (dsp_poll > MAX_POLL) { | |
1132 | printk(KERN_ERR "%s: Wrong poll value (%d), use %d " | |
1133 | "maximum.\n", __func__, poll, MAX_POLL); | |
1134 | err = -EINVAL; | |
1135 | return err; | |
1136 | } | |
1137 | if (dsp_poll < 8) { | |
1138 | printk(KERN_ERR "%s: Wrong poll value (%d), use 8 " | |
1139 | "minimum.\n", __func__, dsp_poll); | |
1140 | err = -EINVAL; | |
1141 | return err; | |
1142 | } | |
1143 | dsp_tics = poll * HZ / 8000; | |
1144 | if (dsp_tics * 8000 != poll * HZ) { | |
1145 | printk(KERN_INFO "mISDN_dsp: Cannot clock every %d " | |
1146 | "samples (0,125 ms). It is not a multiple of " | |
1147 | "%d HZ.\n", poll, HZ); | |
1148 | err = -EINVAL; | |
1149 | return err; | |
1150 | } | |
1151 | } else { | |
1152 | poll = 8; | |
1153 | while (poll <= MAX_POLL) { | |
400fd978 | 1154 | tics = (poll * HZ) / 8000; |
960366cf KK |
1155 | if (tics * 8000 == poll * HZ) { |
1156 | dsp_tics = tics; | |
1157 | dsp_poll = poll; | |
1158 | if (poll >= 64) | |
1159 | break; | |
1160 | } | |
1161 | poll++; | |
1162 | } | |
1163 | } | |
1164 | if (dsp_poll == 0) { | |
1165 | printk(KERN_INFO "mISDN_dsp: There is no multiple of kernel " | |
1166 | "clock that equals exactly the duration of 8-256 " | |
1167 | "samples. (Choose kernel clock speed like 100, 250, " | |
1168 | "300, 1000)\n"); | |
1169 | err = -EINVAL; | |
1170 | return err; | |
1171 | } | |
1172 | printk(KERN_INFO "mISDN_dsp: DSP clocks every %d samples. This equals " | |
1173 | "%d jiffies.\n", dsp_poll, dsp_tics); | |
1174 | ||
1175 | spin_lock_init(&dsp_lock); | |
1176 | INIT_LIST_HEAD(&dsp_ilist); | |
1177 | INIT_LIST_HEAD(&conf_ilist); | |
1178 | ||
1179 | /* init conversion tables */ | |
1180 | dsp_audio_generate_law_tables(); | |
eac74af9 KK |
1181 | dsp_silence = (dsp_options&DSP_OPT_ULAW) ? 0xff : 0x2a; |
1182 | dsp_audio_law_to_s32 = (dsp_options&DSP_OPT_ULAW) ? | |
1183 | dsp_audio_ulaw_to_s32 : dsp_audio_alaw_to_s32; | |
960366cf KK |
1184 | dsp_audio_generate_s2law_table(); |
1185 | dsp_audio_generate_seven(); | |
1186 | dsp_audio_generate_mix_table(); | |
1187 | if (dsp_options & DSP_OPT_ULAW) | |
1188 | dsp_audio_generate_ulaw_samples(); | |
1189 | dsp_audio_generate_volume_changes(); | |
1190 | ||
1191 | err = dsp_pipeline_module_init(); | |
1192 | if (err) { | |
1193 | printk(KERN_ERR "mISDN_dsp: Can't initialize pipeline, " | |
1194 | "error(%d)\n", err); | |
1195 | return err; | |
1196 | } | |
1197 | ||
1198 | err = mISDN_register_Bprotocol(&DSP); | |
1199 | if (err) { | |
1200 | printk(KERN_ERR "Can't register %s error(%d)\n", DSP.name, err); | |
1201 | return err; | |
1202 | } | |
1203 | ||
1204 | /* set sample timer */ | |
1205 | dsp_spl_tl.function = (void *)dsp_cmx_send; | |
1206 | dsp_spl_tl.data = 0; | |
1207 | init_timer(&dsp_spl_tl); | |
1208 | dsp_spl_tl.expires = jiffies + dsp_tics; | |
1209 | dsp_spl_jiffies = dsp_spl_tl.expires; | |
1210 | add_timer(&dsp_spl_tl); | |
1211 | ||
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | ||
3d956d1d | 1216 | static void __exit dsp_cleanup(void) |
960366cf KK |
1217 | { |
1218 | mISDN_unregister_Bprotocol(&DSP); | |
1219 | ||
1220 | if (timer_pending(&dsp_spl_tl)) | |
1221 | del_timer(&dsp_spl_tl); | |
1222 | ||
1223 | if (!list_empty(&dsp_ilist)) { | |
1224 | printk(KERN_ERR "mISDN_dsp: Audio DSP object inst list not " | |
1225 | "empty.\n"); | |
1226 | } | |
1227 | if (!list_empty(&conf_ilist)) { | |
1228 | printk(KERN_ERR "mISDN_dsp: Conference list not empty. Not " | |
1229 | "all memory freed.\n"); | |
1230 | } | |
1231 | ||
1232 | dsp_pipeline_module_exit(); | |
1233 | } | |
1234 | ||
1235 | module_init(dsp_init); | |
1236 | module_exit(dsp_cleanup); | |
1237 |