Commit | Line | Data |
---|---|---|
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", | |
475be4d8 | 221 | __func__); |
960366cf KK |
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", | |
475be4d8 | 228 | __func__); |
960366cf KK |
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", | |
475be4d8 | 234 | __func__, dsp->name, rx_off); |
960366cf KK |
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", | |
475be4d8 | 266 | __func__); |
8dd2f36f AE |
267 | return; |
268 | } | |
269 | cq.op = MISDN_CTRL_FILL_EMPTY; | |
270 | cq.p1 = 1; | |
6d1ee48f | 271 | cq.p2 = dsp_silence; |
8dd2f36f AE |
272 | if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { |
273 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", | |
475be4d8 | 274 | __func__); |
8dd2f36f AE |
275 | return; |
276 | } | |
277 | if (dsp_debug & DEBUG_DSP_CORE) | |
278 | printk(KERN_DEBUG "%s: %s set fill_empty = 1\n", | |
475be4d8 | 279 | __func__, dsp->name); |
8dd2f36f AE |
280 | } |
281 | ||
960366cf KK |
282 | static int |
283 | dsp_control_req(struct dsp *dsp, struct mISDNhead *hh, struct sk_buff *skb) | |
284 | { | |
eac74af9 | 285 | struct sk_buff *nskb; |
960366cf KK |
286 | int ret = 0; |
287 | int cont; | |
288 | u8 *data; | |
289 | int len; | |
290 | ||
0d63c27d | 291 | if (skb->len < sizeof(int)) { |
960366cf | 292 | printk(KERN_ERR "%s: PH_CONTROL message too short\n", __func__); |
0d63c27d DC |
293 | return -EINVAL; |
294 | } | |
960366cf KK |
295 | cont = *((int *)skb->data); |
296 | len = skb->len - sizeof(int); | |
297 | data = skb->data + sizeof(int); | |
298 | ||
299 | switch (cont) { | |
300 | case DTMF_TONE_START: /* turn on DTMF */ | |
301 | if (dsp->hdlc) { | |
302 | ret = -EINVAL; | |
303 | break; | |
304 | } | |
305 | if (dsp_debug & DEBUG_DSP_CORE) | |
306 | printk(KERN_DEBUG "%s: start dtmf\n", __func__); | |
307 | if (len == sizeof(int)) { | |
c6a2e587 AE |
308 | if (dsp_debug & DEBUG_DSP_CORE) |
309 | printk(KERN_NOTICE "changing DTMF Threshold " | |
475be4d8 | 310 | "to %d\n", *((int *)data)); |
960366cf KK |
311 | dsp->dtmf.treshold = (*(int *)data) * 10000; |
312 | } | |
b0579d74 | 313 | dsp->dtmf.enable = 1; |
960366cf KK |
314 | /* init goertzel */ |
315 | dsp_dtmf_goertzel_init(dsp); | |
316 | ||
317 | /* check dtmf hardware */ | |
318 | dsp_dtmf_hardware(dsp); | |
b5df5a5c | 319 | dsp_rx_off(dsp); |
960366cf KK |
320 | break; |
321 | case DTMF_TONE_STOP: /* turn off DTMF */ | |
322 | if (dsp_debug & DEBUG_DSP_CORE) | |
323 | printk(KERN_DEBUG "%s: stop dtmf\n", __func__); | |
b0579d74 | 324 | dsp->dtmf.enable = 0; |
960366cf KK |
325 | dsp->dtmf.hardware = 0; |
326 | dsp->dtmf.software = 0; | |
327 | break; | |
328 | case DSP_CONF_JOIN: /* join / update conference */ | |
329 | if (len < sizeof(int)) { | |
330 | ret = -EINVAL; | |
331 | break; | |
332 | } | |
333 | if (*((u32 *)data) == 0) | |
334 | goto conf_split; | |
335 | if (dsp_debug & DEBUG_DSP_CORE) | |
336 | printk(KERN_DEBUG "%s: join conference %d\n", | |
475be4d8 | 337 | __func__, *((u32 *)data)); |
960366cf | 338 | ret = dsp_cmx_conf(dsp, *((u32 *)data)); |
475be4d8 | 339 | /* dsp_cmx_hardware will also be called here */ |
960366cf KK |
340 | dsp_rx_off(dsp); |
341 | if (dsp_debug & DEBUG_DSP_CMX) | |
342 | dsp_cmx_debug(dsp); | |
343 | break; | |
344 | case DSP_CONF_SPLIT: /* remove from conference */ | |
475be4d8 | 345 | conf_split: |
960366cf KK |
346 | if (dsp_debug & DEBUG_DSP_CORE) |
347 | printk(KERN_DEBUG "%s: release conference\n", __func__); | |
348 | ret = dsp_cmx_conf(dsp, 0); | |
475be4d8 | 349 | /* dsp_cmx_hardware will also be called here */ |
960366cf KK |
350 | if (dsp_debug & DEBUG_DSP_CMX) |
351 | dsp_cmx_debug(dsp); | |
352 | dsp_rx_off(dsp); | |
353 | break; | |
354 | case DSP_TONE_PATT_ON: /* play tone */ | |
355 | if (dsp->hdlc) { | |
356 | ret = -EINVAL; | |
357 | break; | |
358 | } | |
359 | if (len < sizeof(int)) { | |
360 | ret = -EINVAL; | |
361 | break; | |
362 | } | |
363 | if (dsp_debug & DEBUG_DSP_CORE) | |
364 | printk(KERN_DEBUG "%s: turn tone 0x%x on\n", | |
475be4d8 | 365 | __func__, *((int *)skb->data)); |
960366cf KK |
366 | ret = dsp_tone(dsp, *((int *)data)); |
367 | if (!ret) { | |
368 | dsp_cmx_hardware(dsp->conf, dsp); | |
369 | dsp_rx_off(dsp); | |
370 | } | |
371 | if (!dsp->tone.tone) | |
372 | goto tone_off; | |
373 | break; | |
374 | case DSP_TONE_PATT_OFF: /* stop tone */ | |
375 | if (dsp->hdlc) { | |
376 | ret = -EINVAL; | |
377 | break; | |
378 | } | |
379 | if (dsp_debug & DEBUG_DSP_CORE) | |
380 | printk(KERN_DEBUG "%s: turn tone off\n", __func__); | |
381 | dsp_tone(dsp, 0); | |
382 | dsp_cmx_hardware(dsp->conf, dsp); | |
383 | dsp_rx_off(dsp); | |
384 | /* reset tx buffers (user space data) */ | |
475be4d8 | 385 | tone_off: |
960366cf KK |
386 | dsp->rx_W = 0; |
387 | dsp->rx_R = 0; | |
388 | break; | |
389 | case DSP_VOL_CHANGE_TX: /* change volume */ | |
390 | if (dsp->hdlc) { | |
391 | ret = -EINVAL; | |
392 | break; | |
393 | } | |
394 | if (len < sizeof(int)) { | |
395 | ret = -EINVAL; | |
396 | break; | |
397 | } | |
398 | dsp->tx_volume = *((int *)data); | |
399 | if (dsp_debug & DEBUG_DSP_CORE) | |
400 | printk(KERN_DEBUG "%s: change tx vol to %d\n", | |
475be4d8 | 401 | __func__, dsp->tx_volume); |
960366cf KK |
402 | dsp_cmx_hardware(dsp->conf, dsp); |
403 | dsp_dtmf_hardware(dsp); | |
404 | dsp_rx_off(dsp); | |
405 | break; | |
406 | case DSP_VOL_CHANGE_RX: /* change volume */ | |
407 | if (dsp->hdlc) { | |
408 | ret = -EINVAL; | |
409 | break; | |
410 | } | |
411 | if (len < sizeof(int)) { | |
412 | ret = -EINVAL; | |
413 | break; | |
414 | } | |
415 | dsp->rx_volume = *((int *)data); | |
416 | if (dsp_debug & DEBUG_DSP_CORE) | |
417 | printk(KERN_DEBUG "%s: change rx vol to %d\n", | |
475be4d8 | 418 | __func__, dsp->tx_volume); |
960366cf KK |
419 | dsp_cmx_hardware(dsp->conf, dsp); |
420 | dsp_dtmf_hardware(dsp); | |
421 | dsp_rx_off(dsp); | |
422 | break; | |
423 | case DSP_ECHO_ON: /* enable echo */ | |
bc138ec4 | 424 | dsp->echo.software = 1; /* soft echo */ |
960366cf KK |
425 | if (dsp_debug & DEBUG_DSP_CORE) |
426 | printk(KERN_DEBUG "%s: enable cmx-echo\n", __func__); | |
427 | dsp_cmx_hardware(dsp->conf, dsp); | |
428 | dsp_rx_off(dsp); | |
429 | if (dsp_debug & DEBUG_DSP_CMX) | |
430 | dsp_cmx_debug(dsp); | |
431 | break; | |
432 | case DSP_ECHO_OFF: /* disable echo */ | |
bc138ec4 AE |
433 | dsp->echo.software = 0; |
434 | dsp->echo.hardware = 0; | |
960366cf KK |
435 | if (dsp_debug & DEBUG_DSP_CORE) |
436 | printk(KERN_DEBUG "%s: disable cmx-echo\n", __func__); | |
437 | dsp_cmx_hardware(dsp->conf, dsp); | |
438 | dsp_rx_off(dsp); | |
439 | if (dsp_debug & DEBUG_DSP_CMX) | |
440 | dsp_cmx_debug(dsp); | |
441 | break; | |
442 | case DSP_RECEIVE_ON: /* enable receive to user space */ | |
443 | if (dsp_debug & DEBUG_DSP_CORE) | |
444 | printk(KERN_DEBUG "%s: enable receive to user " | |
475be4d8 | 445 | "space\n", __func__); |
960366cf KK |
446 | dsp->rx_disabled = 0; |
447 | dsp_rx_off(dsp); | |
448 | break; | |
449 | case DSP_RECEIVE_OFF: /* disable receive to user space */ | |
450 | if (dsp_debug & DEBUG_DSP_CORE) | |
451 | printk(KERN_DEBUG "%s: disable receive to " | |
475be4d8 | 452 | "user space\n", __func__); |
960366cf KK |
453 | dsp->rx_disabled = 1; |
454 | dsp_rx_off(dsp); | |
455 | break; | |
456 | case DSP_MIX_ON: /* enable mixing of tx data */ | |
457 | if (dsp->hdlc) { | |
458 | ret = -EINVAL; | |
459 | break; | |
460 | } | |
461 | if (dsp_debug & DEBUG_DSP_CORE) | |
462 | printk(KERN_DEBUG "%s: enable mixing of " | |
d939be3a | 463 | "tx-data with conf members\n", __func__); |
960366cf KK |
464 | dsp->tx_mix = 1; |
465 | dsp_cmx_hardware(dsp->conf, dsp); | |
466 | dsp_rx_off(dsp); | |
467 | if (dsp_debug & DEBUG_DSP_CMX) | |
468 | dsp_cmx_debug(dsp); | |
469 | break; | |
470 | case DSP_MIX_OFF: /* disable mixing of tx data */ | |
471 | if (dsp->hdlc) { | |
472 | ret = -EINVAL; | |
473 | break; | |
474 | } | |
475 | if (dsp_debug & DEBUG_DSP_CORE) | |
476 | printk(KERN_DEBUG "%s: disable mixing of " | |
d939be3a | 477 | "tx-data with conf members\n", __func__); |
960366cf KK |
478 | dsp->tx_mix = 0; |
479 | dsp_cmx_hardware(dsp->conf, dsp); | |
480 | dsp_rx_off(dsp); | |
481 | if (dsp_debug & DEBUG_DSP_CMX) | |
482 | dsp_cmx_debug(dsp); | |
483 | break; | |
484 | case DSP_TXDATA_ON: /* enable txdata */ | |
485 | dsp->tx_data = 1; | |
486 | if (dsp_debug & DEBUG_DSP_CORE) | |
487 | printk(KERN_DEBUG "%s: enable tx-data\n", __func__); | |
488 | dsp_cmx_hardware(dsp->conf, dsp); | |
489 | dsp_rx_off(dsp); | |
490 | if (dsp_debug & DEBUG_DSP_CMX) | |
491 | dsp_cmx_debug(dsp); | |
492 | break; | |
493 | case DSP_TXDATA_OFF: /* disable txdata */ | |
494 | dsp->tx_data = 0; | |
495 | if (dsp_debug & DEBUG_DSP_CORE) | |
496 | printk(KERN_DEBUG "%s: disable tx-data\n", __func__); | |
497 | dsp_cmx_hardware(dsp->conf, dsp); | |
498 | dsp_rx_off(dsp); | |
499 | if (dsp_debug & DEBUG_DSP_CMX) | |
500 | dsp_cmx_debug(dsp); | |
501 | break; | |
502 | case DSP_DELAY: /* use delay algorithm instead of dynamic | |
503 | jitter algorithm */ | |
504 | if (dsp->hdlc) { | |
505 | ret = -EINVAL; | |
506 | break; | |
507 | } | |
508 | if (len < sizeof(int)) { | |
509 | ret = -EINVAL; | |
510 | break; | |
511 | } | |
512 | dsp->cmx_delay = (*((int *)data)) << 3; | |
475be4d8 JP |
513 | /* milliseconds to samples */ |
514 | if (dsp->cmx_delay >= (CMX_BUFF_HALF >> 1)) | |
960366cf | 515 | /* clip to half of maximum usable buffer |
475be4d8 JP |
516 | (half of half buffer) */ |
517 | dsp->cmx_delay = (CMX_BUFF_HALF >> 1) - 1; | |
960366cf KK |
518 | if (dsp_debug & DEBUG_DSP_CORE) |
519 | printk(KERN_DEBUG "%s: use delay algorithm to " | |
475be4d8 JP |
520 | "compensate jitter (%d samples)\n", |
521 | __func__, dsp->cmx_delay); | |
960366cf KK |
522 | break; |
523 | case DSP_JITTER: /* use dynamic jitter algorithm instead of | |
475be4d8 | 524 | delay algorithm */ |
960366cf KK |
525 | if (dsp->hdlc) { |
526 | ret = -EINVAL; | |
527 | break; | |
528 | } | |
529 | dsp->cmx_delay = 0; | |
530 | if (dsp_debug & DEBUG_DSP_CORE) | |
531 | printk(KERN_DEBUG "%s: use jitter algorithm to " | |
475be4d8 | 532 | "compensate jitter\n", __func__); |
960366cf KK |
533 | break; |
534 | case DSP_TX_DEJITTER: /* use dynamic jitter algorithm for tx-buffer */ | |
535 | if (dsp->hdlc) { | |
536 | ret = -EINVAL; | |
537 | break; | |
538 | } | |
539 | dsp->tx_dejitter = 1; | |
540 | if (dsp_debug & DEBUG_DSP_CORE) | |
541 | printk(KERN_DEBUG "%s: use dejitter on TX " | |
475be4d8 | 542 | "buffer\n", __func__); |
960366cf KK |
543 | break; |
544 | case DSP_TX_DEJ_OFF: /* use tx-buffer without dejittering*/ | |
545 | if (dsp->hdlc) { | |
546 | ret = -EINVAL; | |
547 | break; | |
548 | } | |
549 | dsp->tx_dejitter = 0; | |
550 | if (dsp_debug & DEBUG_DSP_CORE) | |
551 | printk(KERN_DEBUG "%s: use TX buffer without " | |
475be4d8 | 552 | "dejittering\n", __func__); |
960366cf KK |
553 | break; |
554 | case DSP_PIPELINE_CFG: | |
555 | if (dsp->hdlc) { | |
556 | ret = -EINVAL; | |
557 | break; | |
558 | } | |
559 | if (len > 0 && ((char *)data)[len - 1]) { | |
560 | printk(KERN_DEBUG "%s: pipeline config string " | |
475be4d8 | 561 | "is not NULL terminated!\n", __func__); |
960366cf KK |
562 | ret = -EINVAL; |
563 | } else { | |
564 | dsp->pipeline.inuse = 1; | |
565 | dsp_cmx_hardware(dsp->conf, dsp); | |
566 | ret = dsp_pipeline_build(&dsp->pipeline, | |
475be4d8 | 567 | len > 0 ? data : NULL); |
960366cf KK |
568 | dsp_cmx_hardware(dsp->conf, dsp); |
569 | dsp_rx_off(dsp); | |
570 | } | |
571 | break; | |
572 | case DSP_BF_ENABLE_KEY: /* turn blowfish on */ | |
573 | if (dsp->hdlc) { | |
574 | ret = -EINVAL; | |
575 | break; | |
576 | } | |
577 | if (len < 4 || len > 56) { | |
578 | ret = -EINVAL; | |
579 | break; | |
580 | } | |
581 | if (dsp_debug & DEBUG_DSP_CORE) | |
582 | printk(KERN_DEBUG "%s: turn blowfish on (key " | |
475be4d8 | 583 | "not shown)\n", __func__); |
960366cf KK |
584 | ret = dsp_bf_init(dsp, (u8 *)data, len); |
585 | /* set new cont */ | |
586 | if (!ret) | |
587 | cont = DSP_BF_ACCEPT; | |
588 | else | |
589 | cont = DSP_BF_REJECT; | |
590 | /* send indication if it worked to set it */ | |
591 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, MISDN_ID_ANY, | |
475be4d8 | 592 | sizeof(int), &cont, GFP_ATOMIC); |
960366cf KK |
593 | if (nskb) { |
594 | if (dsp->up) { | |
595 | if (dsp->up->send(dsp->up, nskb)) | |
596 | dev_kfree_skb(nskb); | |
597 | } else | |
598 | dev_kfree_skb(nskb); | |
599 | } | |
600 | if (!ret) { | |
601 | dsp_cmx_hardware(dsp->conf, dsp); | |
602 | dsp_dtmf_hardware(dsp); | |
603 | dsp_rx_off(dsp); | |
604 | } | |
605 | break; | |
606 | case DSP_BF_DISABLE: /* turn blowfish off */ | |
607 | if (dsp->hdlc) { | |
608 | ret = -EINVAL; | |
609 | break; | |
610 | } | |
611 | if (dsp_debug & DEBUG_DSP_CORE) | |
612 | printk(KERN_DEBUG "%s: turn blowfish off\n", __func__); | |
613 | dsp_bf_cleanup(dsp); | |
614 | dsp_cmx_hardware(dsp->conf, dsp); | |
615 | dsp_dtmf_hardware(dsp); | |
616 | dsp_rx_off(dsp); | |
617 | break; | |
618 | default: | |
619 | if (dsp_debug & DEBUG_DSP_CORE) | |
620 | printk(KERN_DEBUG "%s: ctrl req %x unhandled\n", | |
475be4d8 | 621 | __func__, cont); |
960366cf KK |
622 | ret = -EINVAL; |
623 | } | |
624 | return ret; | |
625 | } | |
626 | ||
627 | static void | |
628 | get_features(struct mISDNchannel *ch) | |
629 | { | |
630 | struct dsp *dsp = container_of(ch, struct dsp, ch); | |
631 | struct mISDN_ctrl_req cq; | |
632 | ||
960366cf KK |
633 | if (!ch->peer) { |
634 | if (dsp_debug & DEBUG_DSP_CORE) | |
635 | printk(KERN_DEBUG "%s: no peer, no features\n", | |
475be4d8 | 636 | __func__); |
960366cf KK |
637 | return; |
638 | } | |
639 | memset(&cq, 0, sizeof(cq)); | |
640 | cq.op = MISDN_CTRL_GETOP; | |
641 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq) < 0) { | |
642 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", | |
475be4d8 | 643 | __func__); |
960366cf KK |
644 | return; |
645 | } | |
646 | if (cq.op & MISDN_CTRL_RX_OFF) | |
647 | dsp->features_rx_off = 1; | |
8dd2f36f AE |
648 | if (cq.op & MISDN_CTRL_FILL_EMPTY) |
649 | dsp->features_fill_empty = 1; | |
650 | if (dsp_options & DSP_OPT_NOHARDWARE) | |
651 | return; | |
960366cf KK |
652 | if ((cq.op & MISDN_CTRL_HW_FEATURES_OP)) { |
653 | cq.op = MISDN_CTRL_HW_FEATURES; | |
654 | *((u_long *)&cq.p1) = (u_long)&dsp->features; | |
655 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq)) { | |
656 | printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", | |
475be4d8 | 657 | __func__); |
960366cf KK |
658 | } |
659 | } else | |
660 | if (dsp_debug & DEBUG_DSP_CORE) | |
661 | printk(KERN_DEBUG "%s: features not supported for %s\n", | |
475be4d8 | 662 | __func__, dsp->name); |
960366cf KK |
663 | } |
664 | ||
665 | static int | |
666 | dsp_function(struct mISDNchannel *ch, struct sk_buff *skb) | |
667 | { | |
b5df5a5c | 668 | struct dsp *dsp = container_of(ch, struct dsp, ch); |
960366cf KK |
669 | struct mISDNhead *hh; |
670 | int ret = 0; | |
b5df5a5c | 671 | u8 *digits = NULL; |
960366cf KK |
672 | u_long flags; |
673 | ||
674 | hh = mISDN_HEAD_P(skb); | |
675 | switch (hh->prim) { | |
475be4d8 | 676 | /* FROM DOWN */ |
960366cf KK |
677 | case (PH_DATA_CNF): |
678 | dsp->data_pending = 0; | |
679 | /* trigger next hdlc frame, if any */ | |
680 | if (dsp->hdlc) { | |
681 | spin_lock_irqsave(&dsp_lock, flags); | |
682 | if (dsp->b_active) | |
683 | schedule_work(&dsp->workq); | |
684 | spin_unlock_irqrestore(&dsp_lock, flags); | |
685 | } | |
686 | break; | |
687 | case (PH_DATA_IND): | |
688 | case (DL_DATA_IND): | |
689 | if (skb->len < 1) { | |
690 | ret = -EINVAL; | |
691 | break; | |
692 | } | |
693 | if (dsp->rx_is_off) { | |
694 | if (dsp_debug & DEBUG_DSP_CORE) | |
695 | printk(KERN_DEBUG "%s: rx-data during rx_off" | |
475be4d8 JP |
696 | " for %s\n", |
697 | __func__, dsp->name); | |
960366cf KK |
698 | } |
699 | if (dsp->hdlc) { | |
700 | /* hdlc */ | |
701 | spin_lock_irqsave(&dsp_lock, flags); | |
702 | dsp_cmx_hdlc(dsp, skb); | |
703 | spin_unlock_irqrestore(&dsp_lock, flags); | |
704 | if (dsp->rx_disabled) { | |
705 | /* if receive is not allowed */ | |
706 | break; | |
707 | } | |
708 | hh->prim = DL_DATA_IND; | |
709 | if (dsp->up) | |
710 | return dsp->up->send(dsp->up, skb); | |
711 | break; | |
712 | } | |
713 | ||
ba3af34e AE |
714 | spin_lock_irqsave(&dsp_lock, flags); |
715 | ||
960366cf KK |
716 | /* decrypt if enabled */ |
717 | if (dsp->bf_enable) | |
718 | dsp_bf_decrypt(dsp, skb->data, skb->len); | |
719 | /* pipeline */ | |
720 | if (dsp->pipeline.inuse) | |
721 | dsp_pipeline_process_rx(&dsp->pipeline, skb->data, | |
475be4d8 | 722 | skb->len, hh->id); |
960366cf KK |
723 | /* change volume if requested */ |
724 | if (dsp->rx_volume) | |
725 | dsp_change_volume(skb, dsp->rx_volume); | |
960366cf KK |
726 | /* check if dtmf soft decoding is turned on */ |
727 | if (dsp->dtmf.software) { | |
728 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, | |
475be4d8 | 729 | skb->len, (dsp_options & DSP_OPT_ULAW) ? 1 : 0); |
b5df5a5c AE |
730 | } |
731 | /* we need to process receive data if software */ | |
bc138ec4 | 732 | if (dsp->conf && dsp->conf->software) { |
b5df5a5c AE |
733 | /* process data from card at cmx */ |
734 | dsp_cmx_receive(dsp, skb); | |
735 | } | |
736 | ||
737 | spin_unlock_irqrestore(&dsp_lock, flags); | |
738 | ||
739 | /* send dtmf result, if any */ | |
740 | if (digits) { | |
960366cf | 741 | while (*digits) { |
b5df5a5c | 742 | int k; |
bb68b1d9 | 743 | struct sk_buff *nskb; |
960366cf KK |
744 | if (dsp_debug & DEBUG_DSP_DTMF) |
745 | printk(KERN_DEBUG "%s: digit" | |
475be4d8 JP |
746 | "(%c) to layer %s\n", |
747 | __func__, *digits, dsp->name); | |
b5df5a5c | 748 | k = *digits | DTMF_TONE_VAL; |
960366cf | 749 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, |
475be4d8 JP |
750 | MISDN_ID_ANY, sizeof(int), &k, |
751 | GFP_ATOMIC); | |
960366cf KK |
752 | if (nskb) { |
753 | if (dsp->up) { | |
754 | if (dsp->up->send( | |
475be4d8 | 755 | dsp->up, nskb)) |
b5df5a5c | 756 | dev_kfree_skb(nskb); |
960366cf KK |
757 | } else |
758 | dev_kfree_skb(nskb); | |
759 | } | |
760 | digits++; | |
761 | } | |
762 | } | |
960366cf KK |
763 | if (dsp->rx_disabled) { |
764 | /* if receive is not allowed */ | |
765 | break; | |
766 | } | |
767 | hh->prim = DL_DATA_IND; | |
768 | if (dsp->up) | |
769 | return dsp->up->send(dsp->up, skb); | |
770 | break; | |
771 | case (PH_CONTROL_IND): | |
772 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) | |
773 | printk(KERN_DEBUG "%s: PH_CONTROL INDICATION " | |
475be4d8 JP |
774 | "received: %x (len %d) %s\n", __func__, |
775 | hh->id, skb->len, dsp->name); | |
960366cf KK |
776 | switch (hh->id) { |
777 | case (DTMF_HFC_COEF): /* getting coefficients */ | |
778 | if (!dsp->dtmf.hardware) { | |
779 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) | |
780 | printk(KERN_DEBUG "%s: ignoring DTMF " | |
475be4d8 JP |
781 | "coefficients from HFC\n", |
782 | __func__); | |
960366cf KK |
783 | break; |
784 | } | |
785 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, | |
475be4d8 | 786 | skb->len, 2); |
960366cf KK |
787 | while (*digits) { |
788 | int k; | |
789 | struct sk_buff *nskb; | |
790 | if (dsp_debug & DEBUG_DSP_DTMF) | |
791 | printk(KERN_DEBUG "%s: digit" | |
475be4d8 JP |
792 | "(%c) to layer %s\n", |
793 | __func__, *digits, dsp->name); | |
960366cf KK |
794 | k = *digits | DTMF_TONE_VAL; |
795 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, | |
475be4d8 JP |
796 | MISDN_ID_ANY, sizeof(int), &k, |
797 | GFP_ATOMIC); | |
960366cf KK |
798 | if (nskb) { |
799 | if (dsp->up) { | |
800 | if (dsp->up->send( | |
475be4d8 | 801 | dsp->up, nskb)) |
b5df5a5c | 802 | dev_kfree_skb(nskb); |
960366cf KK |
803 | } else |
804 | dev_kfree_skb(nskb); | |
805 | } | |
806 | digits++; | |
807 | } | |
808 | break; | |
809 | case (HFC_VOL_CHANGE_TX): /* change volume */ | |
810 | if (skb->len != sizeof(int)) { | |
811 | ret = -EINVAL; | |
812 | break; | |
813 | } | |
814 | spin_lock_irqsave(&dsp_lock, flags); | |
815 | dsp->tx_volume = *((int *)skb->data); | |
816 | if (dsp_debug & DEBUG_DSP_CORE) | |
817 | printk(KERN_DEBUG "%s: change tx volume to " | |
475be4d8 | 818 | "%d\n", __func__, dsp->tx_volume); |
960366cf KK |
819 | dsp_cmx_hardware(dsp->conf, dsp); |
820 | dsp_dtmf_hardware(dsp); | |
821 | dsp_rx_off(dsp); | |
822 | spin_unlock_irqrestore(&dsp_lock, flags); | |
823 | break; | |
824 | default: | |
825 | if (dsp_debug & DEBUG_DSP_CORE) | |
826 | printk(KERN_DEBUG "%s: ctrl ind %x unhandled " | |
475be4d8 | 827 | "%s\n", __func__, hh->id, dsp->name); |
960366cf KK |
828 | ret = -EINVAL; |
829 | } | |
830 | break; | |
831 | case (PH_ACTIVATE_IND): | |
832 | case (PH_ACTIVATE_CNF): | |
833 | if (dsp_debug & DEBUG_DSP_CORE) | |
834 | printk(KERN_DEBUG "%s: b_channel is now active %s\n", | |
475be4d8 | 835 | __func__, dsp->name); |
960366cf KK |
836 | /* bchannel now active */ |
837 | spin_lock_irqsave(&dsp_lock, flags); | |
838 | dsp->b_active = 1; | |
839 | dsp->data_pending = 0; | |
840 | dsp->rx_init = 1; | |
475be4d8 | 841 | /* rx_W and rx_R will be adjusted on first frame */ |
960366cf KK |
842 | dsp->rx_W = 0; |
843 | dsp->rx_R = 0; | |
844 | memset(dsp->rx_buff, 0, sizeof(dsp->rx_buff)); | |
845 | dsp_cmx_hardware(dsp->conf, dsp); | |
846 | dsp_dtmf_hardware(dsp); | |
847 | dsp_rx_off(dsp); | |
848 | spin_unlock_irqrestore(&dsp_lock, flags); | |
849 | if (dsp_debug & DEBUG_DSP_CORE) | |
850 | printk(KERN_DEBUG "%s: done with activation, sending " | |
475be4d8 JP |
851 | "confirm to user space. %s\n", __func__, |
852 | dsp->name); | |
960366cf KK |
853 | /* send activation to upper layer */ |
854 | hh->prim = DL_ESTABLISH_CNF; | |
855 | if (dsp->up) | |
856 | return dsp->up->send(dsp->up, skb); | |
857 | break; | |
858 | case (PH_DEACTIVATE_IND): | |
859 | case (PH_DEACTIVATE_CNF): | |
860 | if (dsp_debug & DEBUG_DSP_CORE) | |
861 | printk(KERN_DEBUG "%s: b_channel is now inactive %s\n", | |
475be4d8 | 862 | __func__, dsp->name); |
960366cf KK |
863 | /* bchannel now inactive */ |
864 | spin_lock_irqsave(&dsp_lock, flags); | |
865 | dsp->b_active = 0; | |
866 | dsp->data_pending = 0; | |
867 | dsp_cmx_hardware(dsp->conf, dsp); | |
868 | dsp_rx_off(dsp); | |
869 | spin_unlock_irqrestore(&dsp_lock, flags); | |
870 | hh->prim = DL_RELEASE_CNF; | |
871 | if (dsp->up) | |
872 | return dsp->up->send(dsp->up, skb); | |
873 | break; | |
475be4d8 | 874 | /* FROM UP */ |
960366cf KK |
875 | case (DL_DATA_REQ): |
876 | case (PH_DATA_REQ): | |
877 | if (skb->len < 1) { | |
878 | ret = -EINVAL; | |
879 | break; | |
880 | } | |
881 | if (dsp->hdlc) { | |
882 | /* hdlc */ | |
e4cce225 PS |
883 | if (!dsp->b_active) { |
884 | ret = -EIO; | |
885 | break; | |
960366cf | 886 | } |
e4cce225 PS |
887 | hh->prim = PH_DATA_REQ; |
888 | spin_lock_irqsave(&dsp_lock, flags); | |
889 | skb_queue_tail(&dsp->sendq, skb); | |
890 | schedule_work(&dsp->workq); | |
960366cf KK |
891 | spin_unlock_irqrestore(&dsp_lock, flags); |
892 | return 0; | |
893 | } | |
894 | /* send data to tx-buffer (if no tone is played) */ | |
895 | if (!dsp->tone.tone) { | |
896 | spin_lock_irqsave(&dsp_lock, flags); | |
897 | dsp_cmx_transmit(dsp, skb); | |
898 | spin_unlock_irqrestore(&dsp_lock, flags); | |
899 | } | |
900 | break; | |
901 | case (PH_CONTROL_REQ): | |
902 | spin_lock_irqsave(&dsp_lock, flags); | |
903 | ret = dsp_control_req(dsp, hh, skb); | |
904 | spin_unlock_irqrestore(&dsp_lock, flags); | |
905 | break; | |
906 | case (DL_ESTABLISH_REQ): | |
907 | case (PH_ACTIVATE_REQ): | |
908 | if (dsp_debug & DEBUG_DSP_CORE) | |
909 | printk(KERN_DEBUG "%s: activating b_channel %s\n", | |
475be4d8 | 910 | __func__, dsp->name); |
960366cf KK |
911 | if (dsp->dtmf.hardware || dsp->dtmf.software) |
912 | dsp_dtmf_goertzel_init(dsp); | |
913 | get_features(ch); | |
8dd2f36f AE |
914 | /* enable fill_empty feature */ |
915 | if (dsp->features_fill_empty) | |
916 | dsp_fill_empty(dsp); | |
960366cf KK |
917 | /* send ph_activate */ |
918 | hh->prim = PH_ACTIVATE_REQ; | |
919 | if (ch->peer) | |
920 | return ch->recv(ch->peer, skb); | |
921 | break; | |
922 | case (DL_RELEASE_REQ): | |
923 | case (PH_DEACTIVATE_REQ): | |
924 | if (dsp_debug & DEBUG_DSP_CORE) | |
925 | printk(KERN_DEBUG "%s: releasing b_channel %s\n", | |
475be4d8 | 926 | __func__, dsp->name); |
960366cf KK |
927 | spin_lock_irqsave(&dsp_lock, flags); |
928 | dsp->tone.tone = 0; | |
929 | dsp->tone.hardware = 0; | |
930 | dsp->tone.software = 0; | |
931 | if (timer_pending(&dsp->tone.tl)) | |
932 | del_timer(&dsp->tone.tl); | |
933 | if (dsp->conf) | |
934 | dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be | |
935 | called here */ | |
936 | skb_queue_purge(&dsp->sendq); | |
937 | spin_unlock_irqrestore(&dsp_lock, flags); | |
938 | hh->prim = PH_DEACTIVATE_REQ; | |
939 | if (ch->peer) | |
940 | return ch->recv(ch->peer, skb); | |
941 | break; | |
942 | default: | |
943 | if (dsp_debug & DEBUG_DSP_CORE) | |
944 | printk(KERN_DEBUG "%s: msg %x unhandled %s\n", | |
475be4d8 | 945 | __func__, hh->prim, dsp->name); |
960366cf KK |
946 | ret = -EINVAL; |
947 | } | |
948 | if (!ret) | |
949 | dev_kfree_skb(skb); | |
950 | return ret; | |
951 | } | |
952 | ||
953 | static int | |
954 | dsp_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
955 | { | |
956 | struct dsp *dsp = container_of(ch, struct dsp, ch); | |
957 | u_long flags; | |
958 | int err = 0; | |
959 | ||
960 | if (debug & DEBUG_DSP_CTRL) | |
eac74af9 | 961 | printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd); |
960366cf KK |
962 | |
963 | switch (cmd) { | |
964 | case OPEN_CHANNEL: | |
965 | break; | |
966 | case CLOSE_CHANNEL: | |
967 | if (dsp->ch.peer) | |
968 | dsp->ch.peer->ctrl(dsp->ch.peer, CLOSE_CHANNEL, NULL); | |
969 | ||
970 | /* wait until workqueue has finished, | |
971 | * must lock here, or we may hit send-process currently | |
972 | * queueing. */ | |
973 | spin_lock_irqsave(&dsp_lock, flags); | |
974 | dsp->b_active = 0; | |
975 | spin_unlock_irqrestore(&dsp_lock, flags); | |
976 | /* MUST not be locked, because it waits until queue is done. */ | |
977 | cancel_work_sync(&dsp->workq); | |
978 | spin_lock_irqsave(&dsp_lock, flags); | |
979 | if (timer_pending(&dsp->tone.tl)) | |
980 | del_timer(&dsp->tone.tl); | |
981 | skb_queue_purge(&dsp->sendq); | |
982 | if (dsp_debug & DEBUG_DSP_CTRL) | |
983 | printk(KERN_DEBUG "%s: releasing member %s\n", | |
475be4d8 | 984 | __func__, dsp->name); |
960366cf KK |
985 | dsp->b_active = 0; |
986 | dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be called | |
987 | here */ | |
988 | dsp_pipeline_destroy(&dsp->pipeline); | |
989 | ||
990 | if (dsp_debug & DEBUG_DSP_CTRL) | |
991 | printk(KERN_DEBUG "%s: remove & destroy object %s\n", | |
475be4d8 | 992 | __func__, dsp->name); |
960366cf KK |
993 | list_del(&dsp->list); |
994 | spin_unlock_irqrestore(&dsp_lock, flags); | |
995 | ||
996 | if (dsp_debug & DEBUG_DSP_CTRL) | |
997 | printk(KERN_DEBUG "%s: dsp instance released\n", | |
475be4d8 | 998 | __func__); |
960366cf KK |
999 | vfree(dsp); |
1000 | module_put(THIS_MODULE); | |
1001 | break; | |
1002 | } | |
1003 | return err; | |
1004 | } | |
1005 | ||
1006 | static void | |
1007 | dsp_send_bh(struct work_struct *work) | |
1008 | { | |
1009 | struct dsp *dsp = container_of(work, struct dsp, workq); | |
1010 | struct sk_buff *skb; | |
1011 | struct mISDNhead *hh; | |
1012 | ||
1013 | if (dsp->hdlc && dsp->data_pending) | |
1014 | return; /* wait until data has been acknowledged */ | |
1015 | ||
1016 | /* send queued data */ | |
1017 | while ((skb = skb_dequeue(&dsp->sendq))) { | |
1018 | /* in locked date, we must have still data in queue */ | |
1019 | if (dsp->data_pending) { | |
1020 | if (dsp_debug & DEBUG_DSP_CORE) | |
1021 | printk(KERN_DEBUG "%s: fifo full %s, this is " | |
475be4d8 | 1022 | "no bug!\n", __func__, dsp->name); |
960366cf KK |
1023 | /* flush transparent data, if not acked */ |
1024 | dev_kfree_skb(skb); | |
1025 | continue; | |
1026 | } | |
1027 | hh = mISDN_HEAD_P(skb); | |
1028 | if (hh->prim == DL_DATA_REQ) { | |
1029 | /* send packet up */ | |
1030 | if (dsp->up) { | |
1031 | if (dsp->up->send(dsp->up, skb)) | |
1032 | dev_kfree_skb(skb); | |
1033 | } else | |
1034 | dev_kfree_skb(skb); | |
1035 | } else { | |
1036 | /* send packet down */ | |
1037 | if (dsp->ch.peer) { | |
1038 | dsp->data_pending = 1; | |
1039 | if (dsp->ch.recv(dsp->ch.peer, skb)) { | |
1040 | dev_kfree_skb(skb); | |
1041 | dsp->data_pending = 0; | |
1042 | } | |
1043 | } else | |
1044 | dev_kfree_skb(skb); | |
1045 | } | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | static int | |
1050 | dspcreate(struct channel_req *crq) | |
1051 | { | |
1052 | struct dsp *ndsp; | |
1053 | u_long flags; | |
1054 | ||
1055 | if (crq->protocol != ISDN_P_B_L2DSP | |
475be4d8 | 1056 | && crq->protocol != ISDN_P_B_L2DSPHDLC) |
960366cf | 1057 | return -EPROTONOSUPPORT; |
1ac4594d | 1058 | ndsp = vzalloc(sizeof(struct dsp)); |
960366cf KK |
1059 | if (!ndsp) { |
1060 | printk(KERN_ERR "%s: vmalloc struct dsp failed\n", __func__); | |
1061 | return -ENOMEM; | |
1062 | } | |
960366cf KK |
1063 | if (dsp_debug & DEBUG_DSP_CTRL) |
1064 | printk(KERN_DEBUG "%s: creating new dsp instance\n", __func__); | |
1065 | ||
1066 | /* default enabled */ | |
1067 | INIT_WORK(&ndsp->workq, (void *)dsp_send_bh); | |
1068 | skb_queue_head_init(&ndsp->sendq); | |
1069 | ndsp->ch.send = dsp_function; | |
1070 | ndsp->ch.ctrl = dsp_ctrl; | |
1071 | ndsp->up = crq->ch; | |
1072 | crq->ch = &ndsp->ch; | |
1073 | if (crq->protocol == ISDN_P_B_L2DSP) { | |
1074 | crq->protocol = ISDN_P_B_RAW; | |
1075 | ndsp->hdlc = 0; | |
1076 | } else { | |
1077 | crq->protocol = ISDN_P_B_HDLC; | |
1078 | ndsp->hdlc = 1; | |
1079 | } | |
1080 | if (!try_module_get(THIS_MODULE)) | |
1081 | printk(KERN_WARNING "%s:cannot get module\n", | |
475be4d8 | 1082 | __func__); |
960366cf KK |
1083 | |
1084 | sprintf(ndsp->name, "DSP_C%x(0x%p)", | |
1085 | ndsp->up->st->dev->id + 1, ndsp); | |
1086 | /* set frame size to start */ | |
1087 | ndsp->features.hfc_id = -1; /* current PCM id */ | |
1088 | ndsp->features.pcm_id = -1; /* current PCM id */ | |
1089 | ndsp->pcm_slot_rx = -1; /* current CPM slot */ | |
1090 | ndsp->pcm_slot_tx = -1; | |
1091 | ndsp->pcm_bank_rx = -1; | |
1092 | ndsp->pcm_bank_tx = -1; | |
1093 | ndsp->hfc_conf = -1; /* current conference number */ | |
1094 | /* set tone timer */ | |
1095 | ndsp->tone.tl.function = (void *)dsp_tone_timeout; | |
1096 | ndsp->tone.tl.data = (long) ndsp; | |
1097 | init_timer(&ndsp->tone.tl); | |
1098 | ||
1099 | if (dtmfthreshold < 20 || dtmfthreshold > 500) | |
1100 | dtmfthreshold = 200; | |
475be4d8 | 1101 | ndsp->dtmf.treshold = dtmfthreshold * 10000; |
960366cf KK |
1102 | |
1103 | /* init pipeline append to list */ | |
1104 | spin_lock_irqsave(&dsp_lock, flags); | |
1105 | dsp_pipeline_init(&ndsp->pipeline); | |
1106 | list_add_tail(&ndsp->list, &dsp_ilist); | |
1107 | spin_unlock_irqrestore(&dsp_lock, flags); | |
1108 | ||
1109 | return 0; | |
1110 | } | |
1111 | ||
1112 | ||
1113 | static struct Bprotocol DSP = { | |
1114 | .Bprotocols = (1 << (ISDN_P_B_L2DSP & ISDN_P_B_MASK)) | |
475be4d8 | 1115 | | (1 << (ISDN_P_B_L2DSPHDLC & ISDN_P_B_MASK)), |
960366cf KK |
1116 | .name = "dsp", |
1117 | .create = dspcreate | |
1118 | }; | |
1119 | ||
3d956d1d | 1120 | static int __init dsp_init(void) |
960366cf KK |
1121 | { |
1122 | int err; | |
1123 | int tics; | |
1124 | ||
4807f643 | 1125 | printk(KERN_INFO "DSP module %s\n", mISDN_dsp_revision); |
960366cf KK |
1126 | |
1127 | dsp_options = options; | |
1128 | dsp_debug = debug; | |
1129 | ||
1130 | /* set packet size */ | |
1131 | dsp_poll = poll; | |
1132 | if (dsp_poll) { | |
1133 | if (dsp_poll > MAX_POLL) { | |
1134 | printk(KERN_ERR "%s: Wrong poll value (%d), use %d " | |
475be4d8 | 1135 | "maximum.\n", __func__, poll, MAX_POLL); |
960366cf KK |
1136 | err = -EINVAL; |
1137 | return err; | |
1138 | } | |
1139 | if (dsp_poll < 8) { | |
1140 | printk(KERN_ERR "%s: Wrong poll value (%d), use 8 " | |
475be4d8 | 1141 | "minimum.\n", __func__, dsp_poll); |
960366cf KK |
1142 | err = -EINVAL; |
1143 | return err; | |
1144 | } | |
1145 | dsp_tics = poll * HZ / 8000; | |
1146 | if (dsp_tics * 8000 != poll * HZ) { | |
1147 | printk(KERN_INFO "mISDN_dsp: Cannot clock every %d " | |
475be4d8 JP |
1148 | "samples (0,125 ms). It is not a multiple of " |
1149 | "%d HZ.\n", poll, HZ); | |
960366cf KK |
1150 | err = -EINVAL; |
1151 | return err; | |
1152 | } | |
1153 | } else { | |
1154 | poll = 8; | |
1155 | while (poll <= MAX_POLL) { | |
400fd978 | 1156 | tics = (poll * HZ) / 8000; |
960366cf KK |
1157 | if (tics * 8000 == poll * HZ) { |
1158 | dsp_tics = tics; | |
1159 | dsp_poll = poll; | |
1160 | if (poll >= 64) | |
1161 | break; | |
1162 | } | |
1163 | poll++; | |
1164 | } | |
1165 | } | |
1166 | if (dsp_poll == 0) { | |
1167 | printk(KERN_INFO "mISDN_dsp: There is no multiple of kernel " | |
475be4d8 JP |
1168 | "clock that equals exactly the duration of 8-256 " |
1169 | "samples. (Choose kernel clock speed like 100, 250, " | |
1170 | "300, 1000)\n"); | |
960366cf KK |
1171 | err = -EINVAL; |
1172 | return err; | |
1173 | } | |
1174 | printk(KERN_INFO "mISDN_dsp: DSP clocks every %d samples. This equals " | |
475be4d8 | 1175 | "%d jiffies.\n", dsp_poll, dsp_tics); |
960366cf KK |
1176 | |
1177 | spin_lock_init(&dsp_lock); | |
1178 | INIT_LIST_HEAD(&dsp_ilist); | |
1179 | INIT_LIST_HEAD(&conf_ilist); | |
1180 | ||
1181 | /* init conversion tables */ | |
1182 | dsp_audio_generate_law_tables(); | |
475be4d8 JP |
1183 | dsp_silence = (dsp_options & DSP_OPT_ULAW) ? 0xff : 0x2a; |
1184 | dsp_audio_law_to_s32 = (dsp_options & DSP_OPT_ULAW) ? | |
eac74af9 | 1185 | dsp_audio_ulaw_to_s32 : dsp_audio_alaw_to_s32; |
960366cf KK |
1186 | dsp_audio_generate_s2law_table(); |
1187 | dsp_audio_generate_seven(); | |
1188 | dsp_audio_generate_mix_table(); | |
1189 | if (dsp_options & DSP_OPT_ULAW) | |
1190 | dsp_audio_generate_ulaw_samples(); | |
1191 | dsp_audio_generate_volume_changes(); | |
1192 | ||
1193 | err = dsp_pipeline_module_init(); | |
1194 | if (err) { | |
1195 | printk(KERN_ERR "mISDN_dsp: Can't initialize pipeline, " | |
475be4d8 | 1196 | "error(%d)\n", err); |
960366cf KK |
1197 | return err; |
1198 | } | |
1199 | ||
1200 | err = mISDN_register_Bprotocol(&DSP); | |
1201 | if (err) { | |
1202 | printk(KERN_ERR "Can't register %s error(%d)\n", DSP.name, err); | |
1203 | return err; | |
1204 | } | |
1205 | ||
1206 | /* set sample timer */ | |
1207 | dsp_spl_tl.function = (void *)dsp_cmx_send; | |
1208 | dsp_spl_tl.data = 0; | |
1209 | init_timer(&dsp_spl_tl); | |
1210 | dsp_spl_tl.expires = jiffies + dsp_tics; | |
1211 | dsp_spl_jiffies = dsp_spl_tl.expires; | |
1212 | add_timer(&dsp_spl_tl); | |
1213 | ||
1214 | return 0; | |
1215 | } | |
1216 | ||
1217 | ||
3d956d1d | 1218 | static void __exit dsp_cleanup(void) |
960366cf KK |
1219 | { |
1220 | mISDN_unregister_Bprotocol(&DSP); | |
1221 | ||
4a0ae7b0 | 1222 | del_timer_sync(&dsp_spl_tl); |
960366cf KK |
1223 | |
1224 | if (!list_empty(&dsp_ilist)) { | |
1225 | printk(KERN_ERR "mISDN_dsp: Audio DSP object inst list not " | |
475be4d8 | 1226 | "empty.\n"); |
960366cf KK |
1227 | } |
1228 | if (!list_empty(&conf_ilist)) { | |
1229 | printk(KERN_ERR "mISDN_dsp: Conference list not empty. Not " | |
475be4d8 | 1230 | "all memory freed.\n"); |
960366cf KK |
1231 | } |
1232 | ||
1233 | dsp_pipeline_module_exit(); | |
1234 | } | |
1235 | ||
1236 | module_init(dsp_init); | |
1237 | module_exit(dsp_cleanup); |