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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 | |
960366cf KK |
7 | * |
8 | * Thanks to Karsten Keil (great drivers) | |
9 | * Cologne Chip (great chips) | |
10 | * | |
11 | * This module does: | |
12 | * Real-time tone generation | |
13 | * DTMF detection | |
14 | * Real-time cross-connection and conferrence | |
15 | * Compensate jitter due to system load and hardware fault. | |
16 | * All features are done in kernel space and will be realized | |
17 | * using hardware, if available and supported by chip set. | |
18 | * Blowfish encryption/decryption | |
19 | */ | |
20 | ||
21 | /* STRUCTURE: | |
22 | * | |
23 | * The dsp module provides layer 2 for b-channels (64kbit). It provides | |
24 | * transparent audio forwarding with special digital signal processing: | |
25 | * | |
26 | * - (1) generation of tones | |
27 | * - (2) detection of dtmf tones | |
28 | * - (3) crossconnecting and conferences (clocking) | |
29 | * - (4) echo generation for delay test | |
30 | * - (5) volume control | |
31 | * - (6) disable receive data | |
32 | * - (7) pipeline | |
33 | * - (8) encryption/decryption | |
34 | * | |
35 | * Look: | |
36 | * TX RX | |
37 | * ------upper layer------ | |
38 | * | ^ | |
39 | * | |(6) | |
40 | * v | | |
41 | * +-----+-------------+-----+ | |
42 | * |(3)(4) | | |
43 | * | CMX | | |
44 | * | | | |
45 | * | +-------------+ | |
46 | * | | ^ | |
47 | * | | | | |
48 | * |+---------+| +----+----+ | |
49 | * ||(1) || |(2) | | |
50 | * || || | | | |
51 | * || Tones || | DTMF | | |
52 | * || || | | | |
53 | * || || | | | |
54 | * |+----+----+| +----+----+ | |
55 | * +-----+-----+ ^ | |
56 | * | | | |
57 | * v | | |
58 | * +----+----+ +----+----+ | |
59 | * |(5) | |(5) | | |
60 | * | | | | | |
61 | * |TX Volume| |RX Volume| | |
62 | * | | | | | |
63 | * | | | | | |
64 | * +----+----+ +----+----+ | |
65 | * | ^ | |
66 | * | | | |
67 | * v | | |
68 | * +----+-------------+----+ | |
69 | * |(7) | | |
70 | * | | | |
71 | * | Pipeline Processing | | |
72 | * | | | |
73 | * | | | |
74 | * +----+-------------+----+ | |
75 | * | ^ | |
76 | * | | | |
77 | * v | | |
78 | * +----+----+ +----+----+ | |
79 | * |(8) | |(8) | | |
80 | * | | | | | |
81 | * | Encrypt | | Decrypt | | |
82 | * | | | | | |
83 | * | | | | | |
84 | * +----+----+ +----+----+ | |
85 | * | ^ | |
86 | * | | | |
87 | * v | | |
88 | * ------card layer------ | |
89 | * TX RX | |
90 | * | |
91 | * Above you can see the logical data flow. If software is used to do the | |
92 | * process, it is actually the real data flow. If hardware is used, data | |
93 | * may not flow, but hardware commands to the card, to provide the data flow | |
94 | * as shown. | |
95 | * | |
96 | * NOTE: The channel must be activated in order to make dsp work, even if | |
97 | * no data flow to the upper layer is intended. Activation can be done | |
98 | * after and before controlling the setting using PH_CONTROL requests. | |
99 | * | |
100 | * DTMF: Will be detected by hardware if possible. It is done before CMX | |
101 | * processing. | |
102 | * | |
103 | * Tones: Will be generated via software if endless looped audio fifos are | |
104 | * not supported by hardware. Tones will override all data from CMX. | |
105 | * It is not required to join a conference to use tones at any time. | |
106 | * | |
107 | * CMX: Is transparent when not used. When it is used, it will do | |
108 | * crossconnections and conferences via software if not possible through | |
109 | * hardware. If hardware capability is available, hardware is used. | |
110 | * | |
af901ca1 | 111 | * Echo: Is generated by CMX and is used to check performance of hard and |
960366cf KK |
112 | * software CMX. |
113 | * | |
114 | * The CMX has special functions for conferences with one, two and more | |
115 | * members. It will allow different types of data flow. Receive and transmit | |
08a7e621 | 116 | * data to/form upper layer may be switched on/off individually without losing |
960366cf KK |
117 | * features of CMX, Tones and DTMF. |
118 | * | |
119 | * Echo Cancellation: Sometimes we like to cancel echo from the interface. | |
120 | * Note that a VoIP call may not have echo caused by the IP phone. The echo | |
121 | * is generated by the telephone line connected to it. Because the delay | |
122 | * is high, it becomes an echo. RESULT: Echo Cachelation is required if | |
123 | * both echo AND delay is applied to an interface. | |
124 | * Remember that software CMX always generates a more or less delay. | |
125 | * | |
126 | * If all used features can be realized in hardware, and if transmit and/or | |
127 | * receive data ist disabled, the card may not send/receive any data at all. | |
25985edc LDM |
128 | * Not receiving is useful if only announcements are played. Not sending is |
129 | * useful if an answering machine records audio. Not sending and receiving is | |
130 | * useful during most states of the call. If supported by hardware, tones | |
960366cf KK |
131 | * will be played without cpu load. Small PBXs and NT-Mode applications will |
132 | * not need expensive hardware when processing calls. | |
133 | * | |
134 | * | |
135 | * LOCKING: | |
136 | * | |
137 | * When data is received from upper or lower layer (card), the complete dsp | |
138 | * module is locked by a global lock. This lock MUST lock irq, because it | |
139 | * must lock timer events by DSP poll timer. | |
140 | * When data is ready to be transmitted down, the data is queued and sent | |
141 | * outside lock and timer event. | |
142 | * PH_CONTROL must not change any settings, join or split conference members | |
143 | * during process of data. | |
144 | * | |
145 | * HDLC: | |
146 | * | |
147 | * It works quite the same as transparent, except that HDLC data is forwarded | |
148 | * to all other conference members if no hardware bridging is possible. | |
149 | * Send data will be writte to sendq. Sendq will be sent if confirm is received. | |
150 | * Conference cannot join, if one member is not hdlc. | |
151 | * | |
152 | */ | |
153 | ||
154 | #include <linux/delay.h> | |
5a0e3ad6 | 155 | #include <linux/gfp.h> |
960366cf KK |
156 | #include <linux/mISDNif.h> |
157 | #include <linux/mISDNdsp.h> | |
158 | #include <linux/module.h> | |
159 | #include <linux/vmalloc.h> | |
160 | #include "core.h" | |
161 | #include "dsp.h" | |
162 | ||
5b834354 | 163 | static const char *mISDN_dsp_revision = "2.0"; |
960366cf KK |
164 | |
165 | static int debug; | |
166 | static int options; | |
167 | static int poll; | |
168 | static int dtmfthreshold = 100; | |
169 | ||
170 | MODULE_AUTHOR("Andreas Eversberg"); | |
171 | module_param(debug, uint, S_IRUGO | S_IWUSR); | |
172 | module_param(options, uint, S_IRUGO | S_IWUSR); | |
173 | module_param(poll, uint, S_IRUGO | S_IWUSR); | |
174 | module_param(dtmfthreshold, uint, S_IRUGO | S_IWUSR); | |
175 | MODULE_LICENSE("GPL"); | |
176 | ||
177 | /*int spinnest = 0;*/ | |
178 | ||
77053fb7 | 179 | DEFINE_SPINLOCK(dsp_lock); /* global dsp lock */ |
5979415d SL |
180 | LIST_HEAD(dsp_ilist); |
181 | LIST_HEAD(conf_ilist); | |
960366cf KK |
182 | int dsp_debug; |
183 | int dsp_options; | |
184 | int dsp_poll, dsp_tics; | |
185 | ||
186 | /* check if rx may be turned off or must be turned on */ | |
187 | static void | |
188 | dsp_rx_off_member(struct dsp *dsp) | |
189 | { | |
190 | struct mISDN_ctrl_req cq; | |
191 | int rx_off = 1; | |
192 | ||
8dd2f36f AE |
193 | memset(&cq, 0, sizeof(cq)); |
194 | ||
960366cf KK |
195 | if (!dsp->features_rx_off) |
196 | return; | |
197 | ||
198 | /* not disabled */ | |
199 | if (!dsp->rx_disabled) | |
200 | rx_off = 0; | |
201 | /* software dtmf */ | |
202 | else if (dsp->dtmf.software) | |
203 | rx_off = 0; | |
204 | /* echo in software */ | |
bc138ec4 | 205 | else if (dsp->echo.software) |
960366cf KK |
206 | rx_off = 0; |
207 | /* bridge in software */ | |
bc138ec4 AE |
208 | else if (dsp->conf && dsp->conf->software) |
209 | rx_off = 0; | |
210 | /* data is not required by user space and not required | |
211 | * for echo dtmf detection, soft-echo, soft-bridging */ | |
960366cf KK |
212 | |
213 | if (rx_off == dsp->rx_is_off) | |
214 | return; | |
215 | ||
216 | if (!dsp->ch.peer) { | |
217 | if (dsp_debug & DEBUG_DSP_CORE) | |
218 | printk(KERN_DEBUG "%s: no peer, no rx_off\n", | |
475be4d8 | 219 | __func__); |
960366cf KK |
220 | return; |
221 | } | |
222 | cq.op = MISDN_CTRL_RX_OFF; | |
223 | cq.p1 = rx_off; | |
224 | if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { | |
225 | printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", | |
475be4d8 | 226 | __func__); |
960366cf KK |
227 | return; |
228 | } | |
229 | dsp->rx_is_off = rx_off; | |
230 | if (dsp_debug & DEBUG_DSP_CORE) | |
231 | printk(KERN_DEBUG "%s: %s set rx_off = %d\n", | |
475be4d8 | 232 | __func__, dsp->name, rx_off); |
960366cf KK |
233 | } |
234 | static void | |
235 | dsp_rx_off(struct dsp *dsp) | |
236 | { | |
237 | struct dsp_conf_member *member; | |
238 | ||
239 | if (dsp_options & DSP_OPT_NOHARDWARE) | |
240 | return; | |
241 | ||
242 | /* no conf */ | |
243 | if (!dsp->conf) { | |
244 | dsp_rx_off_member(dsp); | |
245 | return; | |
246 | } | |
247 | /* check all members in conf */ | |
248 | list_for_each_entry(member, &dsp->conf->mlist, list) { | |
249 | dsp_rx_off_member(member->dsp); | |
250 | } | |
251 | } | |
252 | ||
8dd2f36f AE |
253 | /* enable "fill empty" feature */ |
254 | static void | |
255 | dsp_fill_empty(struct dsp *dsp) | |
256 | { | |
257 | struct mISDN_ctrl_req cq; | |
258 | ||
259 | memset(&cq, 0, sizeof(cq)); | |
260 | ||
261 | if (!dsp->ch.peer) { | |
262 | if (dsp_debug & DEBUG_DSP_CORE) | |
263 | printk(KERN_DEBUG "%s: no peer, no fill_empty\n", | |
475be4d8 | 264 | __func__); |
8dd2f36f AE |
265 | return; |
266 | } | |
267 | cq.op = MISDN_CTRL_FILL_EMPTY; | |
268 | cq.p1 = 1; | |
6d1ee48f | 269 | cq.p2 = dsp_silence; |
8dd2f36f AE |
270 | if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { |
271 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", | |
475be4d8 | 272 | __func__); |
8dd2f36f AE |
273 | return; |
274 | } | |
275 | if (dsp_debug & DEBUG_DSP_CORE) | |
276 | printk(KERN_DEBUG "%s: %s set fill_empty = 1\n", | |
475be4d8 | 277 | __func__, dsp->name); |
8dd2f36f AE |
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 | ||
0d63c27d | 289 | if (skb->len < sizeof(int)) { |
960366cf | 290 | printk(KERN_ERR "%s: PH_CONTROL message too short\n", __func__); |
0d63c27d DC |
291 | return -EINVAL; |
292 | } | |
960366cf KK |
293 | cont = *((int *)skb->data); |
294 | len = skb->len - sizeof(int); | |
295 | data = skb->data + sizeof(int); | |
296 | ||
297 | switch (cont) { | |
298 | case DTMF_TONE_START: /* turn on DTMF */ | |
299 | if (dsp->hdlc) { | |
300 | ret = -EINVAL; | |
301 | break; | |
302 | } | |
303 | if (dsp_debug & DEBUG_DSP_CORE) | |
304 | printk(KERN_DEBUG "%s: start dtmf\n", __func__); | |
305 | if (len == sizeof(int)) { | |
c6a2e587 AE |
306 | if (dsp_debug & DEBUG_DSP_CORE) |
307 | printk(KERN_NOTICE "changing DTMF Threshold " | |
475be4d8 | 308 | "to %d\n", *((int *)data)); |
960366cf KK |
309 | dsp->dtmf.treshold = (*(int *)data) * 10000; |
310 | } | |
b0579d74 | 311 | dsp->dtmf.enable = 1; |
960366cf KK |
312 | /* init goertzel */ |
313 | dsp_dtmf_goertzel_init(dsp); | |
314 | ||
315 | /* check dtmf hardware */ | |
316 | dsp_dtmf_hardware(dsp); | |
b5df5a5c | 317 | dsp_rx_off(dsp); |
960366cf KK |
318 | break; |
319 | case DTMF_TONE_STOP: /* turn off DTMF */ | |
320 | if (dsp_debug & DEBUG_DSP_CORE) | |
321 | printk(KERN_DEBUG "%s: stop dtmf\n", __func__); | |
b0579d74 | 322 | dsp->dtmf.enable = 0; |
960366cf KK |
323 | dsp->dtmf.hardware = 0; |
324 | dsp->dtmf.software = 0; | |
325 | break; | |
326 | case DSP_CONF_JOIN: /* join / update conference */ | |
327 | if (len < sizeof(int)) { | |
328 | ret = -EINVAL; | |
329 | break; | |
330 | } | |
331 | if (*((u32 *)data) == 0) | |
332 | goto conf_split; | |
333 | if (dsp_debug & DEBUG_DSP_CORE) | |
334 | printk(KERN_DEBUG "%s: join conference %d\n", | |
475be4d8 | 335 | __func__, *((u32 *)data)); |
960366cf | 336 | ret = dsp_cmx_conf(dsp, *((u32 *)data)); |
475be4d8 | 337 | /* dsp_cmx_hardware will also be called here */ |
960366cf KK |
338 | dsp_rx_off(dsp); |
339 | if (dsp_debug & DEBUG_DSP_CMX) | |
340 | dsp_cmx_debug(dsp); | |
341 | break; | |
342 | case DSP_CONF_SPLIT: /* remove from conference */ | |
475be4d8 | 343 | conf_split: |
960366cf KK |
344 | if (dsp_debug & DEBUG_DSP_CORE) |
345 | printk(KERN_DEBUG "%s: release conference\n", __func__); | |
346 | ret = dsp_cmx_conf(dsp, 0); | |
475be4d8 | 347 | /* dsp_cmx_hardware will also be called here */ |
960366cf KK |
348 | if (dsp_debug & DEBUG_DSP_CMX) |
349 | dsp_cmx_debug(dsp); | |
350 | dsp_rx_off(dsp); | |
351 | break; | |
352 | case DSP_TONE_PATT_ON: /* play tone */ | |
353 | if (dsp->hdlc) { | |
354 | ret = -EINVAL; | |
355 | break; | |
356 | } | |
357 | if (len < sizeof(int)) { | |
358 | ret = -EINVAL; | |
359 | break; | |
360 | } | |
361 | if (dsp_debug & DEBUG_DSP_CORE) | |
362 | printk(KERN_DEBUG "%s: turn tone 0x%x on\n", | |
475be4d8 | 363 | __func__, *((int *)skb->data)); |
960366cf KK |
364 | ret = dsp_tone(dsp, *((int *)data)); |
365 | if (!ret) { | |
366 | dsp_cmx_hardware(dsp->conf, dsp); | |
367 | dsp_rx_off(dsp); | |
368 | } | |
369 | if (!dsp->tone.tone) | |
370 | goto tone_off; | |
371 | break; | |
372 | case DSP_TONE_PATT_OFF: /* stop tone */ | |
373 | if (dsp->hdlc) { | |
374 | ret = -EINVAL; | |
375 | break; | |
376 | } | |
377 | if (dsp_debug & DEBUG_DSP_CORE) | |
378 | printk(KERN_DEBUG "%s: turn tone off\n", __func__); | |
379 | dsp_tone(dsp, 0); | |
380 | dsp_cmx_hardware(dsp->conf, dsp); | |
381 | dsp_rx_off(dsp); | |
382 | /* reset tx buffers (user space data) */ | |
475be4d8 | 383 | tone_off: |
960366cf KK |
384 | dsp->rx_W = 0; |
385 | dsp->rx_R = 0; | |
386 | break; | |
387 | case DSP_VOL_CHANGE_TX: /* change volume */ | |
388 | if (dsp->hdlc) { | |
389 | ret = -EINVAL; | |
390 | break; | |
391 | } | |
392 | if (len < sizeof(int)) { | |
393 | ret = -EINVAL; | |
394 | break; | |
395 | } | |
396 | dsp->tx_volume = *((int *)data); | |
397 | if (dsp_debug & DEBUG_DSP_CORE) | |
398 | printk(KERN_DEBUG "%s: change tx vol to %d\n", | |
475be4d8 | 399 | __func__, dsp->tx_volume); |
960366cf KK |
400 | dsp_cmx_hardware(dsp->conf, dsp); |
401 | dsp_dtmf_hardware(dsp); | |
402 | dsp_rx_off(dsp); | |
403 | break; | |
404 | case DSP_VOL_CHANGE_RX: /* change volume */ | |
405 | if (dsp->hdlc) { | |
406 | ret = -EINVAL; | |
407 | break; | |
408 | } | |
409 | if (len < sizeof(int)) { | |
410 | ret = -EINVAL; | |
411 | break; | |
412 | } | |
413 | dsp->rx_volume = *((int *)data); | |
414 | if (dsp_debug & DEBUG_DSP_CORE) | |
415 | printk(KERN_DEBUG "%s: change rx vol to %d\n", | |
475be4d8 | 416 | __func__, dsp->tx_volume); |
960366cf KK |
417 | dsp_cmx_hardware(dsp->conf, dsp); |
418 | dsp_dtmf_hardware(dsp); | |
419 | dsp_rx_off(dsp); | |
420 | break; | |
421 | case DSP_ECHO_ON: /* enable echo */ | |
bc138ec4 | 422 | dsp->echo.software = 1; /* soft echo */ |
960366cf KK |
423 | if (dsp_debug & DEBUG_DSP_CORE) |
424 | printk(KERN_DEBUG "%s: enable cmx-echo\n", __func__); | |
425 | dsp_cmx_hardware(dsp->conf, dsp); | |
426 | dsp_rx_off(dsp); | |
427 | if (dsp_debug & DEBUG_DSP_CMX) | |
428 | dsp_cmx_debug(dsp); | |
429 | break; | |
430 | case DSP_ECHO_OFF: /* disable echo */ | |
bc138ec4 AE |
431 | dsp->echo.software = 0; |
432 | dsp->echo.hardware = 0; | |
960366cf KK |
433 | if (dsp_debug & DEBUG_DSP_CORE) |
434 | printk(KERN_DEBUG "%s: disable cmx-echo\n", __func__); | |
435 | dsp_cmx_hardware(dsp->conf, dsp); | |
436 | dsp_rx_off(dsp); | |
437 | if (dsp_debug & DEBUG_DSP_CMX) | |
438 | dsp_cmx_debug(dsp); | |
439 | break; | |
440 | case DSP_RECEIVE_ON: /* enable receive to user space */ | |
441 | if (dsp_debug & DEBUG_DSP_CORE) | |
442 | printk(KERN_DEBUG "%s: enable receive to user " | |
475be4d8 | 443 | "space\n", __func__); |
960366cf KK |
444 | dsp->rx_disabled = 0; |
445 | dsp_rx_off(dsp); | |
446 | break; | |
447 | case DSP_RECEIVE_OFF: /* disable receive to user space */ | |
448 | if (dsp_debug & DEBUG_DSP_CORE) | |
449 | printk(KERN_DEBUG "%s: disable receive to " | |
475be4d8 | 450 | "user space\n", __func__); |
960366cf KK |
451 | dsp->rx_disabled = 1; |
452 | dsp_rx_off(dsp); | |
453 | break; | |
454 | case DSP_MIX_ON: /* enable mixing of tx data */ | |
455 | if (dsp->hdlc) { | |
456 | ret = -EINVAL; | |
457 | break; | |
458 | } | |
459 | if (dsp_debug & DEBUG_DSP_CORE) | |
460 | printk(KERN_DEBUG "%s: enable mixing of " | |
d939be3a | 461 | "tx-data with conf members\n", __func__); |
960366cf KK |
462 | dsp->tx_mix = 1; |
463 | dsp_cmx_hardware(dsp->conf, dsp); | |
464 | dsp_rx_off(dsp); | |
465 | if (dsp_debug & DEBUG_DSP_CMX) | |
466 | dsp_cmx_debug(dsp); | |
467 | break; | |
468 | case DSP_MIX_OFF: /* disable mixing of tx data */ | |
469 | if (dsp->hdlc) { | |
470 | ret = -EINVAL; | |
471 | break; | |
472 | } | |
473 | if (dsp_debug & DEBUG_DSP_CORE) | |
474 | printk(KERN_DEBUG "%s: disable mixing of " | |
d939be3a | 475 | "tx-data with conf members\n", __func__); |
960366cf KK |
476 | dsp->tx_mix = 0; |
477 | dsp_cmx_hardware(dsp->conf, dsp); | |
478 | dsp_rx_off(dsp); | |
479 | if (dsp_debug & DEBUG_DSP_CMX) | |
480 | dsp_cmx_debug(dsp); | |
481 | break; | |
482 | case DSP_TXDATA_ON: /* enable txdata */ | |
483 | dsp->tx_data = 1; | |
484 | if (dsp_debug & DEBUG_DSP_CORE) | |
485 | printk(KERN_DEBUG "%s: enable tx-data\n", __func__); | |
486 | dsp_cmx_hardware(dsp->conf, dsp); | |
487 | dsp_rx_off(dsp); | |
488 | if (dsp_debug & DEBUG_DSP_CMX) | |
489 | dsp_cmx_debug(dsp); | |
490 | break; | |
491 | case DSP_TXDATA_OFF: /* disable txdata */ | |
492 | dsp->tx_data = 0; | |
493 | if (dsp_debug & DEBUG_DSP_CORE) | |
494 | printk(KERN_DEBUG "%s: disable tx-data\n", __func__); | |
495 | dsp_cmx_hardware(dsp->conf, dsp); | |
496 | dsp_rx_off(dsp); | |
497 | if (dsp_debug & DEBUG_DSP_CMX) | |
498 | dsp_cmx_debug(dsp); | |
499 | break; | |
500 | case DSP_DELAY: /* use delay algorithm instead of dynamic | |
501 | jitter algorithm */ | |
502 | if (dsp->hdlc) { | |
503 | ret = -EINVAL; | |
504 | break; | |
505 | } | |
506 | if (len < sizeof(int)) { | |
507 | ret = -EINVAL; | |
508 | break; | |
509 | } | |
510 | dsp->cmx_delay = (*((int *)data)) << 3; | |
475be4d8 JP |
511 | /* milliseconds to samples */ |
512 | if (dsp->cmx_delay >= (CMX_BUFF_HALF >> 1)) | |
960366cf | 513 | /* clip to half of maximum usable buffer |
475be4d8 JP |
514 | (half of half buffer) */ |
515 | dsp->cmx_delay = (CMX_BUFF_HALF >> 1) - 1; | |
960366cf KK |
516 | if (dsp_debug & DEBUG_DSP_CORE) |
517 | printk(KERN_DEBUG "%s: use delay algorithm to " | |
475be4d8 JP |
518 | "compensate jitter (%d samples)\n", |
519 | __func__, dsp->cmx_delay); | |
960366cf KK |
520 | break; |
521 | case DSP_JITTER: /* use dynamic jitter algorithm instead of | |
475be4d8 | 522 | delay algorithm */ |
960366cf KK |
523 | if (dsp->hdlc) { |
524 | ret = -EINVAL; | |
525 | break; | |
526 | } | |
527 | dsp->cmx_delay = 0; | |
528 | if (dsp_debug & DEBUG_DSP_CORE) | |
529 | printk(KERN_DEBUG "%s: use jitter algorithm to " | |
475be4d8 | 530 | "compensate jitter\n", __func__); |
960366cf KK |
531 | break; |
532 | case DSP_TX_DEJITTER: /* use dynamic jitter algorithm for tx-buffer */ | |
533 | if (dsp->hdlc) { | |
534 | ret = -EINVAL; | |
535 | break; | |
536 | } | |
537 | dsp->tx_dejitter = 1; | |
538 | if (dsp_debug & DEBUG_DSP_CORE) | |
539 | printk(KERN_DEBUG "%s: use dejitter on TX " | |
475be4d8 | 540 | "buffer\n", __func__); |
960366cf KK |
541 | break; |
542 | case DSP_TX_DEJ_OFF: /* use tx-buffer without dejittering*/ | |
543 | if (dsp->hdlc) { | |
544 | ret = -EINVAL; | |
545 | break; | |
546 | } | |
547 | dsp->tx_dejitter = 0; | |
548 | if (dsp_debug & DEBUG_DSP_CORE) | |
549 | printk(KERN_DEBUG "%s: use TX buffer without " | |
475be4d8 | 550 | "dejittering\n", __func__); |
960366cf KK |
551 | break; |
552 | case DSP_PIPELINE_CFG: | |
553 | if (dsp->hdlc) { | |
554 | ret = -EINVAL; | |
555 | break; | |
556 | } | |
557 | if (len > 0 && ((char *)data)[len - 1]) { | |
558 | printk(KERN_DEBUG "%s: pipeline config string " | |
475be4d8 | 559 | "is not NULL terminated!\n", __func__); |
960366cf KK |
560 | ret = -EINVAL; |
561 | } else { | |
562 | dsp->pipeline.inuse = 1; | |
563 | dsp_cmx_hardware(dsp->conf, dsp); | |
564 | ret = dsp_pipeline_build(&dsp->pipeline, | |
475be4d8 | 565 | len > 0 ? data : NULL); |
960366cf KK |
566 | dsp_cmx_hardware(dsp->conf, dsp); |
567 | dsp_rx_off(dsp); | |
568 | } | |
569 | break; | |
570 | case DSP_BF_ENABLE_KEY: /* turn blowfish on */ | |
571 | if (dsp->hdlc) { | |
572 | ret = -EINVAL; | |
573 | break; | |
574 | } | |
575 | if (len < 4 || len > 56) { | |
576 | ret = -EINVAL; | |
577 | break; | |
578 | } | |
579 | if (dsp_debug & DEBUG_DSP_CORE) | |
580 | printk(KERN_DEBUG "%s: turn blowfish on (key " | |
475be4d8 | 581 | "not shown)\n", __func__); |
960366cf KK |
582 | ret = dsp_bf_init(dsp, (u8 *)data, len); |
583 | /* set new cont */ | |
584 | if (!ret) | |
585 | cont = DSP_BF_ACCEPT; | |
586 | else | |
587 | cont = DSP_BF_REJECT; | |
588 | /* send indication if it worked to set it */ | |
589 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, MISDN_ID_ANY, | |
475be4d8 | 590 | sizeof(int), &cont, GFP_ATOMIC); |
960366cf KK |
591 | if (nskb) { |
592 | if (dsp->up) { | |
593 | if (dsp->up->send(dsp->up, nskb)) | |
594 | dev_kfree_skb(nskb); | |
595 | } else | |
596 | dev_kfree_skb(nskb); | |
597 | } | |
598 | if (!ret) { | |
599 | dsp_cmx_hardware(dsp->conf, dsp); | |
600 | dsp_dtmf_hardware(dsp); | |
601 | dsp_rx_off(dsp); | |
602 | } | |
603 | break; | |
604 | case DSP_BF_DISABLE: /* turn blowfish off */ | |
605 | if (dsp->hdlc) { | |
606 | ret = -EINVAL; | |
607 | break; | |
608 | } | |
609 | if (dsp_debug & DEBUG_DSP_CORE) | |
610 | printk(KERN_DEBUG "%s: turn blowfish off\n", __func__); | |
611 | dsp_bf_cleanup(dsp); | |
612 | dsp_cmx_hardware(dsp->conf, dsp); | |
613 | dsp_dtmf_hardware(dsp); | |
614 | dsp_rx_off(dsp); | |
615 | break; | |
616 | default: | |
617 | if (dsp_debug & DEBUG_DSP_CORE) | |
618 | printk(KERN_DEBUG "%s: ctrl req %x unhandled\n", | |
475be4d8 | 619 | __func__, cont); |
960366cf KK |
620 | ret = -EINVAL; |
621 | } | |
622 | return ret; | |
623 | } | |
624 | ||
625 | static void | |
626 | get_features(struct mISDNchannel *ch) | |
627 | { | |
628 | struct dsp *dsp = container_of(ch, struct dsp, ch); | |
629 | struct mISDN_ctrl_req cq; | |
630 | ||
960366cf KK |
631 | if (!ch->peer) { |
632 | if (dsp_debug & DEBUG_DSP_CORE) | |
633 | printk(KERN_DEBUG "%s: no peer, no features\n", | |
475be4d8 | 634 | __func__); |
960366cf KK |
635 | return; |
636 | } | |
637 | memset(&cq, 0, sizeof(cq)); | |
638 | cq.op = MISDN_CTRL_GETOP; | |
639 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq) < 0) { | |
640 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", | |
475be4d8 | 641 | __func__); |
960366cf KK |
642 | return; |
643 | } | |
644 | if (cq.op & MISDN_CTRL_RX_OFF) | |
645 | dsp->features_rx_off = 1; | |
8dd2f36f AE |
646 | if (cq.op & MISDN_CTRL_FILL_EMPTY) |
647 | dsp->features_fill_empty = 1; | |
648 | if (dsp_options & DSP_OPT_NOHARDWARE) | |
649 | return; | |
960366cf KK |
650 | if ((cq.op & MISDN_CTRL_HW_FEATURES_OP)) { |
651 | cq.op = MISDN_CTRL_HW_FEATURES; | |
652 | *((u_long *)&cq.p1) = (u_long)&dsp->features; | |
653 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq)) { | |
654 | printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", | |
475be4d8 | 655 | __func__); |
960366cf KK |
656 | } |
657 | } else | |
658 | if (dsp_debug & DEBUG_DSP_CORE) | |
659 | printk(KERN_DEBUG "%s: features not supported for %s\n", | |
475be4d8 | 660 | __func__, dsp->name); |
960366cf KK |
661 | } |
662 | ||
663 | static int | |
664 | dsp_function(struct mISDNchannel *ch, struct sk_buff *skb) | |
665 | { | |
b5df5a5c | 666 | struct dsp *dsp = container_of(ch, struct dsp, ch); |
960366cf KK |
667 | struct mISDNhead *hh; |
668 | int ret = 0; | |
b5df5a5c | 669 | u8 *digits = NULL; |
960366cf KK |
670 | u_long flags; |
671 | ||
672 | hh = mISDN_HEAD_P(skb); | |
673 | switch (hh->prim) { | |
475be4d8 | 674 | /* FROM DOWN */ |
960366cf KK |
675 | case (PH_DATA_CNF): |
676 | dsp->data_pending = 0; | |
677 | /* trigger next hdlc frame, if any */ | |
678 | if (dsp->hdlc) { | |
679 | spin_lock_irqsave(&dsp_lock, flags); | |
680 | if (dsp->b_active) | |
681 | schedule_work(&dsp->workq); | |
682 | spin_unlock_irqrestore(&dsp_lock, flags); | |
683 | } | |
684 | break; | |
685 | case (PH_DATA_IND): | |
686 | case (DL_DATA_IND): | |
687 | if (skb->len < 1) { | |
688 | ret = -EINVAL; | |
689 | break; | |
690 | } | |
691 | if (dsp->rx_is_off) { | |
692 | if (dsp_debug & DEBUG_DSP_CORE) | |
693 | printk(KERN_DEBUG "%s: rx-data during rx_off" | |
475be4d8 JP |
694 | " for %s\n", |
695 | __func__, dsp->name); | |
960366cf KK |
696 | } |
697 | if (dsp->hdlc) { | |
698 | /* hdlc */ | |
699 | spin_lock_irqsave(&dsp_lock, flags); | |
700 | dsp_cmx_hdlc(dsp, skb); | |
701 | spin_unlock_irqrestore(&dsp_lock, flags); | |
702 | if (dsp->rx_disabled) { | |
703 | /* if receive is not allowed */ | |
704 | break; | |
705 | } | |
706 | hh->prim = DL_DATA_IND; | |
707 | if (dsp->up) | |
708 | return dsp->up->send(dsp->up, skb); | |
709 | break; | |
710 | } | |
711 | ||
ba3af34e AE |
712 | spin_lock_irqsave(&dsp_lock, flags); |
713 | ||
960366cf KK |
714 | /* decrypt if enabled */ |
715 | if (dsp->bf_enable) | |
716 | dsp_bf_decrypt(dsp, skb->data, skb->len); | |
717 | /* pipeline */ | |
718 | if (dsp->pipeline.inuse) | |
719 | dsp_pipeline_process_rx(&dsp->pipeline, skb->data, | |
475be4d8 | 720 | skb->len, hh->id); |
960366cf KK |
721 | /* change volume if requested */ |
722 | if (dsp->rx_volume) | |
723 | dsp_change_volume(skb, dsp->rx_volume); | |
960366cf KK |
724 | /* check if dtmf soft decoding is turned on */ |
725 | if (dsp->dtmf.software) { | |
726 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, | |
475be4d8 | 727 | skb->len, (dsp_options & DSP_OPT_ULAW) ? 1 : 0); |
b5df5a5c AE |
728 | } |
729 | /* we need to process receive data if software */ | |
bc138ec4 | 730 | if (dsp->conf && dsp->conf->software) { |
b5df5a5c AE |
731 | /* process data from card at cmx */ |
732 | dsp_cmx_receive(dsp, skb); | |
733 | } | |
734 | ||
735 | spin_unlock_irqrestore(&dsp_lock, flags); | |
736 | ||
737 | /* send dtmf result, if any */ | |
738 | if (digits) { | |
960366cf | 739 | while (*digits) { |
b5df5a5c | 740 | int k; |
bb68b1d9 | 741 | struct sk_buff *nskb; |
960366cf KK |
742 | if (dsp_debug & DEBUG_DSP_DTMF) |
743 | printk(KERN_DEBUG "%s: digit" | |
475be4d8 JP |
744 | "(%c) to layer %s\n", |
745 | __func__, *digits, dsp->name); | |
b5df5a5c | 746 | k = *digits | DTMF_TONE_VAL; |
960366cf | 747 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, |
475be4d8 JP |
748 | MISDN_ID_ANY, sizeof(int), &k, |
749 | GFP_ATOMIC); | |
960366cf KK |
750 | if (nskb) { |
751 | if (dsp->up) { | |
752 | if (dsp->up->send( | |
475be4d8 | 753 | dsp->up, nskb)) |
b5df5a5c | 754 | dev_kfree_skb(nskb); |
960366cf KK |
755 | } else |
756 | dev_kfree_skb(nskb); | |
757 | } | |
758 | digits++; | |
759 | } | |
760 | } | |
960366cf KK |
761 | if (dsp->rx_disabled) { |
762 | /* if receive is not allowed */ | |
763 | break; | |
764 | } | |
765 | hh->prim = DL_DATA_IND; | |
766 | if (dsp->up) | |
767 | return dsp->up->send(dsp->up, skb); | |
768 | break; | |
769 | case (PH_CONTROL_IND): | |
770 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) | |
771 | printk(KERN_DEBUG "%s: PH_CONTROL INDICATION " | |
475be4d8 JP |
772 | "received: %x (len %d) %s\n", __func__, |
773 | hh->id, skb->len, dsp->name); | |
960366cf KK |
774 | switch (hh->id) { |
775 | case (DTMF_HFC_COEF): /* getting coefficients */ | |
776 | if (!dsp->dtmf.hardware) { | |
777 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) | |
778 | printk(KERN_DEBUG "%s: ignoring DTMF " | |
475be4d8 JP |
779 | "coefficients from HFC\n", |
780 | __func__); | |
960366cf KK |
781 | break; |
782 | } | |
783 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, | |
475be4d8 | 784 | skb->len, 2); |
960366cf KK |
785 | while (*digits) { |
786 | int k; | |
787 | struct sk_buff *nskb; | |
788 | if (dsp_debug & DEBUG_DSP_DTMF) | |
789 | printk(KERN_DEBUG "%s: digit" | |
475be4d8 JP |
790 | "(%c) to layer %s\n", |
791 | __func__, *digits, dsp->name); | |
960366cf KK |
792 | k = *digits | DTMF_TONE_VAL; |
793 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, | |
475be4d8 JP |
794 | MISDN_ID_ANY, sizeof(int), &k, |
795 | GFP_ATOMIC); | |
960366cf KK |
796 | if (nskb) { |
797 | if (dsp->up) { | |
798 | if (dsp->up->send( | |
475be4d8 | 799 | dsp->up, nskb)) |
b5df5a5c | 800 | dev_kfree_skb(nskb); |
960366cf KK |
801 | } else |
802 | dev_kfree_skb(nskb); | |
803 | } | |
804 | digits++; | |
805 | } | |
806 | break; | |
807 | case (HFC_VOL_CHANGE_TX): /* change volume */ | |
808 | if (skb->len != sizeof(int)) { | |
809 | ret = -EINVAL; | |
810 | break; | |
811 | } | |
812 | spin_lock_irqsave(&dsp_lock, flags); | |
813 | dsp->tx_volume = *((int *)skb->data); | |
814 | if (dsp_debug & DEBUG_DSP_CORE) | |
815 | printk(KERN_DEBUG "%s: change tx volume to " | |
475be4d8 | 816 | "%d\n", __func__, dsp->tx_volume); |
960366cf KK |
817 | dsp_cmx_hardware(dsp->conf, dsp); |
818 | dsp_dtmf_hardware(dsp); | |
819 | dsp_rx_off(dsp); | |
820 | spin_unlock_irqrestore(&dsp_lock, flags); | |
821 | break; | |
822 | default: | |
823 | if (dsp_debug & DEBUG_DSP_CORE) | |
824 | printk(KERN_DEBUG "%s: ctrl ind %x unhandled " | |
475be4d8 | 825 | "%s\n", __func__, hh->id, dsp->name); |
960366cf KK |
826 | ret = -EINVAL; |
827 | } | |
828 | break; | |
829 | case (PH_ACTIVATE_IND): | |
830 | case (PH_ACTIVATE_CNF): | |
831 | if (dsp_debug & DEBUG_DSP_CORE) | |
832 | printk(KERN_DEBUG "%s: b_channel is now active %s\n", | |
475be4d8 | 833 | __func__, dsp->name); |
960366cf KK |
834 | /* bchannel now active */ |
835 | spin_lock_irqsave(&dsp_lock, flags); | |
836 | dsp->b_active = 1; | |
837 | dsp->data_pending = 0; | |
838 | dsp->rx_init = 1; | |
475be4d8 | 839 | /* rx_W and rx_R will be adjusted on first frame */ |
960366cf KK |
840 | dsp->rx_W = 0; |
841 | dsp->rx_R = 0; | |
842 | memset(dsp->rx_buff, 0, sizeof(dsp->rx_buff)); | |
843 | dsp_cmx_hardware(dsp->conf, dsp); | |
844 | dsp_dtmf_hardware(dsp); | |
845 | dsp_rx_off(dsp); | |
846 | spin_unlock_irqrestore(&dsp_lock, flags); | |
847 | if (dsp_debug & DEBUG_DSP_CORE) | |
848 | printk(KERN_DEBUG "%s: done with activation, sending " | |
475be4d8 JP |
849 | "confirm to user space. %s\n", __func__, |
850 | dsp->name); | |
960366cf KK |
851 | /* send activation to upper layer */ |
852 | hh->prim = DL_ESTABLISH_CNF; | |
853 | if (dsp->up) | |
854 | return dsp->up->send(dsp->up, skb); | |
855 | break; | |
856 | case (PH_DEACTIVATE_IND): | |
857 | case (PH_DEACTIVATE_CNF): | |
858 | if (dsp_debug & DEBUG_DSP_CORE) | |
859 | printk(KERN_DEBUG "%s: b_channel is now inactive %s\n", | |
475be4d8 | 860 | __func__, dsp->name); |
960366cf KK |
861 | /* bchannel now inactive */ |
862 | spin_lock_irqsave(&dsp_lock, flags); | |
863 | dsp->b_active = 0; | |
864 | dsp->data_pending = 0; | |
865 | dsp_cmx_hardware(dsp->conf, dsp); | |
866 | dsp_rx_off(dsp); | |
867 | spin_unlock_irqrestore(&dsp_lock, flags); | |
868 | hh->prim = DL_RELEASE_CNF; | |
869 | if (dsp->up) | |
870 | return dsp->up->send(dsp->up, skb); | |
871 | break; | |
475be4d8 | 872 | /* FROM UP */ |
960366cf KK |
873 | case (DL_DATA_REQ): |
874 | case (PH_DATA_REQ): | |
875 | if (skb->len < 1) { | |
876 | ret = -EINVAL; | |
877 | break; | |
878 | } | |
879 | if (dsp->hdlc) { | |
880 | /* hdlc */ | |
e4cce225 PS |
881 | if (!dsp->b_active) { |
882 | ret = -EIO; | |
883 | break; | |
960366cf | 884 | } |
e4cce225 PS |
885 | hh->prim = PH_DATA_REQ; |
886 | spin_lock_irqsave(&dsp_lock, flags); | |
887 | skb_queue_tail(&dsp->sendq, skb); | |
888 | schedule_work(&dsp->workq); | |
960366cf KK |
889 | spin_unlock_irqrestore(&dsp_lock, flags); |
890 | return 0; | |
891 | } | |
892 | /* send data to tx-buffer (if no tone is played) */ | |
893 | if (!dsp->tone.tone) { | |
894 | spin_lock_irqsave(&dsp_lock, flags); | |
895 | dsp_cmx_transmit(dsp, skb); | |
896 | spin_unlock_irqrestore(&dsp_lock, flags); | |
897 | } | |
898 | break; | |
899 | case (PH_CONTROL_REQ): | |
900 | spin_lock_irqsave(&dsp_lock, flags); | |
901 | ret = dsp_control_req(dsp, hh, skb); | |
902 | spin_unlock_irqrestore(&dsp_lock, flags); | |
903 | break; | |
904 | case (DL_ESTABLISH_REQ): | |
905 | case (PH_ACTIVATE_REQ): | |
906 | if (dsp_debug & DEBUG_DSP_CORE) | |
907 | printk(KERN_DEBUG "%s: activating b_channel %s\n", | |
475be4d8 | 908 | __func__, dsp->name); |
960366cf KK |
909 | if (dsp->dtmf.hardware || dsp->dtmf.software) |
910 | dsp_dtmf_goertzel_init(dsp); | |
911 | get_features(ch); | |
8dd2f36f AE |
912 | /* enable fill_empty feature */ |
913 | if (dsp->features_fill_empty) | |
914 | dsp_fill_empty(dsp); | |
960366cf KK |
915 | /* send ph_activate */ |
916 | hh->prim = PH_ACTIVATE_REQ; | |
917 | if (ch->peer) | |
918 | return ch->recv(ch->peer, skb); | |
919 | break; | |
920 | case (DL_RELEASE_REQ): | |
921 | case (PH_DEACTIVATE_REQ): | |
922 | if (dsp_debug & DEBUG_DSP_CORE) | |
923 | printk(KERN_DEBUG "%s: releasing b_channel %s\n", | |
475be4d8 | 924 | __func__, dsp->name); |
960366cf KK |
925 | spin_lock_irqsave(&dsp_lock, flags); |
926 | dsp->tone.tone = 0; | |
927 | dsp->tone.hardware = 0; | |
928 | dsp->tone.software = 0; | |
929 | if (timer_pending(&dsp->tone.tl)) | |
930 | del_timer(&dsp->tone.tl); | |
931 | if (dsp->conf) | |
932 | dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be | |
933 | called here */ | |
934 | skb_queue_purge(&dsp->sendq); | |
935 | spin_unlock_irqrestore(&dsp_lock, flags); | |
936 | hh->prim = PH_DEACTIVATE_REQ; | |
937 | if (ch->peer) | |
938 | return ch->recv(ch->peer, skb); | |
939 | break; | |
940 | default: | |
941 | if (dsp_debug & DEBUG_DSP_CORE) | |
942 | printk(KERN_DEBUG "%s: msg %x unhandled %s\n", | |
475be4d8 | 943 | __func__, hh->prim, dsp->name); |
960366cf KK |
944 | ret = -EINVAL; |
945 | } | |
946 | if (!ret) | |
947 | dev_kfree_skb(skb); | |
948 | return ret; | |
949 | } | |
950 | ||
951 | static int | |
952 | dsp_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
953 | { | |
954 | struct dsp *dsp = container_of(ch, struct dsp, ch); | |
955 | u_long flags; | |
960366cf KK |
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", | |
475be4d8 | 981 | __func__, dsp->name); |
960366cf KK |
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", | |
475be4d8 | 989 | __func__, dsp->name); |
960366cf KK |
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", | |
475be4d8 | 995 | __func__); |
960366cf KK |
996 | vfree(dsp); |
997 | module_put(THIS_MODULE); | |
998 | break; | |
999 | } | |
762c1adb | 1000 | return 0; |
960366cf KK |
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 " | |
475be4d8 | 1019 | "no bug!\n", __func__, dsp->name); |
960366cf KK |
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 | |
475be4d8 | 1053 | && crq->protocol != ISDN_P_B_L2DSPHDLC) |
960366cf | 1054 | return -EPROTONOSUPPORT; |
1ac4594d | 1055 | ndsp = vzalloc(sizeof(struct dsp)); |
960366cf KK |
1056 | if (!ndsp) { |
1057 | printk(KERN_ERR "%s: vmalloc struct dsp failed\n", __func__); | |
1058 | return -ENOMEM; | |
1059 | } | |
960366cf KK |
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", | |
475be4d8 | 1079 | __func__); |
960366cf KK |
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 */ | |
e313ac12 | 1092 | timer_setup(&ndsp->tone.tl, dsp_tone_timeout, 0); |
960366cf KK |
1093 | |
1094 | if (dtmfthreshold < 20 || dtmfthreshold > 500) | |
1095 | dtmfthreshold = 200; | |
475be4d8 | 1096 | ndsp->dtmf.treshold = dtmfthreshold * 10000; |
960366cf KK |
1097 | |
1098 | /* init pipeline append to list */ | |
1099 | spin_lock_irqsave(&dsp_lock, flags); | |
1100 | dsp_pipeline_init(&ndsp->pipeline); | |
1101 | list_add_tail(&ndsp->list, &dsp_ilist); | |
1102 | spin_unlock_irqrestore(&dsp_lock, flags); | |
1103 | ||
1104 | return 0; | |
1105 | } | |
1106 | ||
1107 | ||
1108 | static struct Bprotocol DSP = { | |
1109 | .Bprotocols = (1 << (ISDN_P_B_L2DSP & ISDN_P_B_MASK)) | |
475be4d8 | 1110 | | (1 << (ISDN_P_B_L2DSPHDLC & ISDN_P_B_MASK)), |
960366cf KK |
1111 | .name = "dsp", |
1112 | .create = dspcreate | |
1113 | }; | |
1114 | ||
3d956d1d | 1115 | static int __init dsp_init(void) |
960366cf KK |
1116 | { |
1117 | int err; | |
1118 | int tics; | |
1119 | ||
4807f643 | 1120 | printk(KERN_INFO "DSP module %s\n", mISDN_dsp_revision); |
960366cf KK |
1121 | |
1122 | dsp_options = options; | |
1123 | dsp_debug = debug; | |
1124 | ||
1125 | /* set packet size */ | |
1126 | dsp_poll = poll; | |
1127 | if (dsp_poll) { | |
1128 | if (dsp_poll > MAX_POLL) { | |
1129 | printk(KERN_ERR "%s: Wrong poll value (%d), use %d " | |
475be4d8 | 1130 | "maximum.\n", __func__, poll, MAX_POLL); |
960366cf KK |
1131 | err = -EINVAL; |
1132 | return err; | |
1133 | } | |
1134 | if (dsp_poll < 8) { | |
1135 | printk(KERN_ERR "%s: Wrong poll value (%d), use 8 " | |
475be4d8 | 1136 | "minimum.\n", __func__, dsp_poll); |
960366cf KK |
1137 | err = -EINVAL; |
1138 | return err; | |
1139 | } | |
1140 | dsp_tics = poll * HZ / 8000; | |
1141 | if (dsp_tics * 8000 != poll * HZ) { | |
1142 | printk(KERN_INFO "mISDN_dsp: Cannot clock every %d " | |
475be4d8 JP |
1143 | "samples (0,125 ms). It is not a multiple of " |
1144 | "%d HZ.\n", poll, HZ); | |
960366cf KK |
1145 | err = -EINVAL; |
1146 | return err; | |
1147 | } | |
1148 | } else { | |
1149 | poll = 8; | |
1150 | while (poll <= MAX_POLL) { | |
400fd978 | 1151 | tics = (poll * HZ) / 8000; |
960366cf KK |
1152 | if (tics * 8000 == poll * HZ) { |
1153 | dsp_tics = tics; | |
1154 | dsp_poll = poll; | |
1155 | if (poll >= 64) | |
1156 | break; | |
1157 | } | |
1158 | poll++; | |
1159 | } | |
1160 | } | |
1161 | if (dsp_poll == 0) { | |
1162 | printk(KERN_INFO "mISDN_dsp: There is no multiple of kernel " | |
475be4d8 JP |
1163 | "clock that equals exactly the duration of 8-256 " |
1164 | "samples. (Choose kernel clock speed like 100, 250, " | |
1165 | "300, 1000)\n"); | |
960366cf KK |
1166 | err = -EINVAL; |
1167 | return err; | |
1168 | } | |
1169 | printk(KERN_INFO "mISDN_dsp: DSP clocks every %d samples. This equals " | |
475be4d8 | 1170 | "%d jiffies.\n", dsp_poll, dsp_tics); |
960366cf | 1171 | |
960366cf KK |
1172 | /* init conversion tables */ |
1173 | dsp_audio_generate_law_tables(); | |
475be4d8 JP |
1174 | dsp_silence = (dsp_options & DSP_OPT_ULAW) ? 0xff : 0x2a; |
1175 | dsp_audio_law_to_s32 = (dsp_options & DSP_OPT_ULAW) ? | |
eac74af9 | 1176 | dsp_audio_ulaw_to_s32 : dsp_audio_alaw_to_s32; |
960366cf KK |
1177 | dsp_audio_generate_s2law_table(); |
1178 | dsp_audio_generate_seven(); | |
1179 | dsp_audio_generate_mix_table(); | |
1180 | if (dsp_options & DSP_OPT_ULAW) | |
1181 | dsp_audio_generate_ulaw_samples(); | |
1182 | dsp_audio_generate_volume_changes(); | |
1183 | ||
1184 | err = dsp_pipeline_module_init(); | |
1185 | if (err) { | |
1186 | printk(KERN_ERR "mISDN_dsp: Can't initialize pipeline, " | |
475be4d8 | 1187 | "error(%d)\n", err); |
960366cf KK |
1188 | return err; |
1189 | } | |
1190 | ||
1191 | err = mISDN_register_Bprotocol(&DSP); | |
1192 | if (err) { | |
1193 | printk(KERN_ERR "Can't register %s error(%d)\n", DSP.name, err); | |
1194 | return err; | |
1195 | } | |
1196 | ||
1197 | /* set sample timer */ | |
1696ec86 | 1198 | timer_setup(&dsp_spl_tl, dsp_cmx_send, 0); |
960366cf KK |
1199 | dsp_spl_tl.expires = jiffies + dsp_tics; |
1200 | dsp_spl_jiffies = dsp_spl_tl.expires; | |
1201 | add_timer(&dsp_spl_tl); | |
1202 | ||
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | ||
3d956d1d | 1207 | static void __exit dsp_cleanup(void) |
960366cf KK |
1208 | { |
1209 | mISDN_unregister_Bprotocol(&DSP); | |
1210 | ||
4a0ae7b0 | 1211 | del_timer_sync(&dsp_spl_tl); |
960366cf KK |
1212 | |
1213 | if (!list_empty(&dsp_ilist)) { | |
1214 | printk(KERN_ERR "mISDN_dsp: Audio DSP object inst list not " | |
475be4d8 | 1215 | "empty.\n"); |
960366cf KK |
1216 | } |
1217 | if (!list_empty(&conf_ilist)) { | |
1218 | printk(KERN_ERR "mISDN_dsp: Conference list not empty. Not " | |
475be4d8 | 1219 | "all memory freed.\n"); |
960366cf KK |
1220 | } |
1221 | ||
1222 | dsp_pipeline_module_exit(); | |
1223 | } | |
1224 | ||
1225 | module_init(dsp_init); | |
1226 | module_exit(dsp_cleanup); |