Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Author Andreas Eversberg (jolly@eversberg.eu) |
| 3 | * Based on source code structure by |
| 4 | * Karsten Keil (keil@isdn4linux.de) |
| 5 | * |
| 6 | * This file is (c) under GNU PUBLIC LICENSE |
| 7 | * For changes and modifications please read |
| 8 | * ../../../Documentation/isdn/mISDN.cert |
| 9 | * |
| 10 | * Thanks to Karsten Keil (great drivers) |
| 11 | * Cologne Chip (great chips) |
| 12 | * |
| 13 | * This module does: |
| 14 | * Real-time tone generation |
| 15 | * DTMF detection |
| 16 | * Real-time cross-connection and conferrence |
| 17 | * Compensate jitter due to system load and hardware fault. |
| 18 | * All features are done in kernel space and will be realized |
| 19 | * using hardware, if available and supported by chip set. |
| 20 | * Blowfish encryption/decryption |
| 21 | */ |
| 22 | |
| 23 | /* STRUCTURE: |
| 24 | * |
| 25 | * The dsp module provides layer 2 for b-channels (64kbit). It provides |
| 26 | * transparent audio forwarding with special digital signal processing: |
| 27 | * |
| 28 | * - (1) generation of tones |
| 29 | * - (2) detection of dtmf tones |
| 30 | * - (3) crossconnecting and conferences (clocking) |
| 31 | * - (4) echo generation for delay test |
| 32 | * - (5) volume control |
| 33 | * - (6) disable receive data |
| 34 | * - (7) pipeline |
| 35 | * - (8) encryption/decryption |
| 36 | * |
| 37 | * Look: |
| 38 | * TX RX |
| 39 | * ------upper layer------ |
| 40 | * | ^ |
| 41 | * | |(6) |
| 42 | * v | |
| 43 | * +-----+-------------+-----+ |
| 44 | * |(3)(4) | |
| 45 | * | CMX | |
| 46 | * | | |
| 47 | * | +-------------+ |
| 48 | * | | ^ |
| 49 | * | | | |
| 50 | * |+---------+| +----+----+ |
| 51 | * ||(1) || |(2) | |
| 52 | * || || | | |
| 53 | * || Tones || | DTMF | |
| 54 | * || || | | |
| 55 | * || || | | |
| 56 | * |+----+----+| +----+----+ |
| 57 | * +-----+-----+ ^ |
| 58 | * | | |
| 59 | * v | |
| 60 | * +----+----+ +----+----+ |
| 61 | * |(5) | |(5) | |
| 62 | * | | | | |
| 63 | * |TX Volume| |RX Volume| |
| 64 | * | | | | |
| 65 | * | | | | |
| 66 | * +----+----+ +----+----+ |
| 67 | * | ^ |
| 68 | * | | |
| 69 | * v | |
| 70 | * +----+-------------+----+ |
| 71 | * |(7) | |
| 72 | * | | |
| 73 | * | Pipeline Processing | |
| 74 | * | | |
| 75 | * | | |
| 76 | * +----+-------------+----+ |
| 77 | * | ^ |
| 78 | * | | |
| 79 | * v | |
| 80 | * +----+----+ +----+----+ |
| 81 | * |(8) | |(8) | |
| 82 | * | | | | |
| 83 | * | Encrypt | | Decrypt | |
| 84 | * | | | | |
| 85 | * | | | | |
| 86 | * +----+----+ +----+----+ |
| 87 | * | ^ |
| 88 | * | | |
| 89 | * v | |
| 90 | * ------card layer------ |
| 91 | * TX RX |
| 92 | * |
| 93 | * Above you can see the logical data flow. If software is used to do the |
| 94 | * process, it is actually the real data flow. If hardware is used, data |
| 95 | * may not flow, but hardware commands to the card, to provide the data flow |
| 96 | * as shown. |
| 97 | * |
| 98 | * NOTE: The channel must be activated in order to make dsp work, even if |
| 99 | * no data flow to the upper layer is intended. Activation can be done |
| 100 | * after and before controlling the setting using PH_CONTROL requests. |
| 101 | * |
| 102 | * DTMF: Will be detected by hardware if possible. It is done before CMX |
| 103 | * processing. |
| 104 | * |
| 105 | * Tones: Will be generated via software if endless looped audio fifos are |
| 106 | * not supported by hardware. Tones will override all data from CMX. |
| 107 | * It is not required to join a conference to use tones at any time. |
| 108 | * |
| 109 | * CMX: Is transparent when not used. When it is used, it will do |
| 110 | * crossconnections and conferences via software if not possible through |
| 111 | * hardware. If hardware capability is available, hardware is used. |
| 112 | * |
| 113 | * Echo: Is generated by CMX and is used to check performane of hard and |
| 114 | * software CMX. |
| 115 | * |
| 116 | * The CMX has special functions for conferences with one, two and more |
| 117 | * members. It will allow different types of data flow. Receive and transmit |
| 118 | * data to/form upper layer may be swithed on/off individually without loosing |
| 119 | * features of CMX, Tones and DTMF. |
| 120 | * |
| 121 | * Echo Cancellation: Sometimes we like to cancel echo from the interface. |
| 122 | * Note that a VoIP call may not have echo caused by the IP phone. The echo |
| 123 | * is generated by the telephone line connected to it. Because the delay |
| 124 | * is high, it becomes an echo. RESULT: Echo Cachelation is required if |
| 125 | * both echo AND delay is applied to an interface. |
| 126 | * Remember that software CMX always generates a more or less delay. |
| 127 | * |
| 128 | * If all used features can be realized in hardware, and if transmit and/or |
| 129 | * receive data ist disabled, the card may not send/receive any data at all. |
| 130 | * Not receiving is usefull if only announcements are played. Not sending is |
| 131 | * usefull if an answering machine records audio. Not sending and receiving is |
| 132 | * usefull during most states of the call. If supported by hardware, tones |
| 133 | * will be played without cpu load. Small PBXs and NT-Mode applications will |
| 134 | * not need expensive hardware when processing calls. |
| 135 | * |
| 136 | * |
| 137 | * LOCKING: |
| 138 | * |
| 139 | * When data is received from upper or lower layer (card), the complete dsp |
| 140 | * module is locked by a global lock. This lock MUST lock irq, because it |
| 141 | * must lock timer events by DSP poll timer. |
| 142 | * When data is ready to be transmitted down, the data is queued and sent |
| 143 | * outside lock and timer event. |
| 144 | * PH_CONTROL must not change any settings, join or split conference members |
| 145 | * during process of data. |
| 146 | * |
| 147 | * HDLC: |
| 148 | * |
| 149 | * It works quite the same as transparent, except that HDLC data is forwarded |
| 150 | * to all other conference members if no hardware bridging is possible. |
| 151 | * Send data will be writte to sendq. Sendq will be sent if confirm is received. |
| 152 | * Conference cannot join, if one member is not hdlc. |
| 153 | * |
| 154 | */ |
| 155 | |
| 156 | #include <linux/delay.h> |
| 157 | #include <linux/mISDNif.h> |
| 158 | #include <linux/mISDNdsp.h> |
| 159 | #include <linux/module.h> |
| 160 | #include <linux/vmalloc.h> |
| 161 | #include "core.h" |
| 162 | #include "dsp.h" |
| 163 | |
Hannes Eder | 5b83435 | 2008-12-12 21:15:17 -0800 | [diff] [blame] | 164 | static const char *mISDN_dsp_revision = "2.0"; |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 165 | |
| 166 | static int debug; |
| 167 | static int options; |
| 168 | static int poll; |
| 169 | static int dtmfthreshold = 100; |
| 170 | |
| 171 | MODULE_AUTHOR("Andreas Eversberg"); |
| 172 | module_param(debug, uint, S_IRUGO | S_IWUSR); |
| 173 | module_param(options, uint, S_IRUGO | S_IWUSR); |
| 174 | module_param(poll, uint, S_IRUGO | S_IWUSR); |
| 175 | module_param(dtmfthreshold, uint, S_IRUGO | S_IWUSR); |
| 176 | MODULE_LICENSE("GPL"); |
| 177 | |
| 178 | /*int spinnest = 0;*/ |
| 179 | |
| 180 | spinlock_t dsp_lock; /* global dsp lock */ |
| 181 | struct list_head dsp_ilist; |
| 182 | struct list_head conf_ilist; |
| 183 | int dsp_debug; |
| 184 | int dsp_options; |
| 185 | int dsp_poll, dsp_tics; |
| 186 | |
| 187 | /* check if rx may be turned off or must be turned on */ |
| 188 | static void |
| 189 | dsp_rx_off_member(struct dsp *dsp) |
| 190 | { |
| 191 | struct mISDN_ctrl_req cq; |
| 192 | int rx_off = 1; |
| 193 | |
Andreas Eversberg | 8dd2f36 | 2008-08-02 22:51:52 +0200 | [diff] [blame] | 194 | memset(&cq, 0, sizeof(cq)); |
| 195 | |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 196 | if (!dsp->features_rx_off) |
| 197 | return; |
| 198 | |
| 199 | /* not disabled */ |
| 200 | if (!dsp->rx_disabled) |
| 201 | rx_off = 0; |
| 202 | /* software dtmf */ |
| 203 | else if (dsp->dtmf.software) |
| 204 | rx_off = 0; |
| 205 | /* echo in software */ |
| 206 | else if (dsp->echo && dsp->pcm_slot_tx < 0) |
| 207 | rx_off = 0; |
| 208 | /* bridge in software */ |
| 209 | else if (dsp->conf) { |
| 210 | if (dsp->conf->software) |
| 211 | rx_off = 0; |
| 212 | } |
| 213 | |
| 214 | if (rx_off == dsp->rx_is_off) |
| 215 | return; |
| 216 | |
| 217 | if (!dsp->ch.peer) { |
| 218 | if (dsp_debug & DEBUG_DSP_CORE) |
| 219 | printk(KERN_DEBUG "%s: no peer, no rx_off\n", |
| 220 | __func__); |
| 221 | return; |
| 222 | } |
| 223 | cq.op = MISDN_CTRL_RX_OFF; |
| 224 | cq.p1 = rx_off; |
| 225 | if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { |
| 226 | printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", |
| 227 | __func__); |
| 228 | return; |
| 229 | } |
| 230 | dsp->rx_is_off = rx_off; |
| 231 | if (dsp_debug & DEBUG_DSP_CORE) |
| 232 | printk(KERN_DEBUG "%s: %s set rx_off = %d\n", |
| 233 | __func__, dsp->name, rx_off); |
| 234 | } |
| 235 | static void |
| 236 | dsp_rx_off(struct dsp *dsp) |
| 237 | { |
| 238 | struct dsp_conf_member *member; |
| 239 | |
| 240 | if (dsp_options & DSP_OPT_NOHARDWARE) |
| 241 | return; |
| 242 | |
| 243 | /* no conf */ |
| 244 | if (!dsp->conf) { |
| 245 | dsp_rx_off_member(dsp); |
| 246 | return; |
| 247 | } |
| 248 | /* check all members in conf */ |
| 249 | list_for_each_entry(member, &dsp->conf->mlist, list) { |
| 250 | dsp_rx_off_member(member->dsp); |
| 251 | } |
| 252 | } |
| 253 | |
Andreas Eversberg | 8dd2f36 | 2008-08-02 22:51:52 +0200 | [diff] [blame] | 254 | /* enable "fill empty" feature */ |
| 255 | static void |
| 256 | dsp_fill_empty(struct dsp *dsp) |
| 257 | { |
| 258 | struct mISDN_ctrl_req cq; |
| 259 | |
| 260 | memset(&cq, 0, sizeof(cq)); |
| 261 | |
| 262 | if (!dsp->ch.peer) { |
| 263 | if (dsp_debug & DEBUG_DSP_CORE) |
| 264 | printk(KERN_DEBUG "%s: no peer, no fill_empty\n", |
| 265 | __func__); |
| 266 | return; |
| 267 | } |
| 268 | cq.op = MISDN_CTRL_FILL_EMPTY; |
| 269 | cq.p1 = 1; |
| 270 | if (dsp->ch.peer->ctrl(dsp->ch.peer, CONTROL_CHANNEL, &cq)) { |
| 271 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", |
| 272 | __func__); |
| 273 | return; |
| 274 | } |
| 275 | if (dsp_debug & DEBUG_DSP_CORE) |
| 276 | printk(KERN_DEBUG "%s: %s set fill_empty = 1\n", |
| 277 | __func__, dsp->name); |
| 278 | } |
| 279 | |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 280 | static int |
| 281 | dsp_control_req(struct dsp *dsp, struct mISDNhead *hh, struct sk_buff *skb) |
| 282 | { |
| 283 | struct sk_buff *nskb; |
| 284 | int ret = 0; |
| 285 | int cont; |
| 286 | u8 *data; |
| 287 | int len; |
| 288 | |
| 289 | if (skb->len < sizeof(int)) |
| 290 | printk(KERN_ERR "%s: PH_CONTROL message too short\n", __func__); |
| 291 | cont = *((int *)skb->data); |
| 292 | len = skb->len - sizeof(int); |
| 293 | data = skb->data + sizeof(int); |
| 294 | |
| 295 | switch (cont) { |
| 296 | case DTMF_TONE_START: /* turn on DTMF */ |
| 297 | if (dsp->hdlc) { |
| 298 | ret = -EINVAL; |
| 299 | break; |
| 300 | } |
| 301 | if (dsp_debug & DEBUG_DSP_CORE) |
| 302 | printk(KERN_DEBUG "%s: start dtmf\n", __func__); |
| 303 | if (len == sizeof(int)) { |
Andreas Eversberg | c6a2e58 | 2008-12-28 16:31:26 +0100 | [diff] [blame] | 304 | if (dsp_debug & DEBUG_DSP_CORE) |
| 305 | printk(KERN_NOTICE "changing DTMF Threshold " |
| 306 | "to %d\n", *((int *)data)); |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 307 | dsp->dtmf.treshold = (*(int *)data) * 10000; |
| 308 | } |
| 309 | /* init goertzel */ |
| 310 | dsp_dtmf_goertzel_init(dsp); |
| 311 | |
| 312 | /* check dtmf hardware */ |
| 313 | dsp_dtmf_hardware(dsp); |
| 314 | break; |
| 315 | case DTMF_TONE_STOP: /* turn off DTMF */ |
| 316 | if (dsp_debug & DEBUG_DSP_CORE) |
| 317 | printk(KERN_DEBUG "%s: stop dtmf\n", __func__); |
| 318 | dsp->dtmf.hardware = 0; |
| 319 | dsp->dtmf.software = 0; |
| 320 | break; |
| 321 | case DSP_CONF_JOIN: /* join / update conference */ |
| 322 | if (len < sizeof(int)) { |
| 323 | ret = -EINVAL; |
| 324 | break; |
| 325 | } |
| 326 | if (*((u32 *)data) == 0) |
| 327 | goto conf_split; |
| 328 | if (dsp_debug & DEBUG_DSP_CORE) |
| 329 | printk(KERN_DEBUG "%s: join conference %d\n", |
| 330 | __func__, *((u32 *)data)); |
| 331 | ret = dsp_cmx_conf(dsp, *((u32 *)data)); |
| 332 | /* dsp_cmx_hardware will also be called here */ |
| 333 | dsp_rx_off(dsp); |
| 334 | if (dsp_debug & DEBUG_DSP_CMX) |
| 335 | dsp_cmx_debug(dsp); |
| 336 | break; |
| 337 | case DSP_CONF_SPLIT: /* remove from conference */ |
| 338 | conf_split: |
| 339 | if (dsp_debug & DEBUG_DSP_CORE) |
| 340 | printk(KERN_DEBUG "%s: release conference\n", __func__); |
| 341 | ret = dsp_cmx_conf(dsp, 0); |
| 342 | /* dsp_cmx_hardware will also be called here */ |
| 343 | if (dsp_debug & DEBUG_DSP_CMX) |
| 344 | dsp_cmx_debug(dsp); |
| 345 | dsp_rx_off(dsp); |
| 346 | break; |
| 347 | case DSP_TONE_PATT_ON: /* play tone */ |
| 348 | if (dsp->hdlc) { |
| 349 | ret = -EINVAL; |
| 350 | break; |
| 351 | } |
| 352 | if (len < sizeof(int)) { |
| 353 | ret = -EINVAL; |
| 354 | break; |
| 355 | } |
| 356 | if (dsp_debug & DEBUG_DSP_CORE) |
| 357 | printk(KERN_DEBUG "%s: turn tone 0x%x on\n", |
| 358 | __func__, *((int *)skb->data)); |
| 359 | ret = dsp_tone(dsp, *((int *)data)); |
| 360 | if (!ret) { |
| 361 | dsp_cmx_hardware(dsp->conf, dsp); |
| 362 | dsp_rx_off(dsp); |
| 363 | } |
| 364 | if (!dsp->tone.tone) |
| 365 | goto tone_off; |
| 366 | break; |
| 367 | case DSP_TONE_PATT_OFF: /* stop tone */ |
| 368 | if (dsp->hdlc) { |
| 369 | ret = -EINVAL; |
| 370 | break; |
| 371 | } |
| 372 | if (dsp_debug & DEBUG_DSP_CORE) |
| 373 | printk(KERN_DEBUG "%s: turn tone off\n", __func__); |
| 374 | dsp_tone(dsp, 0); |
| 375 | dsp_cmx_hardware(dsp->conf, dsp); |
| 376 | dsp_rx_off(dsp); |
| 377 | /* reset tx buffers (user space data) */ |
| 378 | tone_off: |
| 379 | dsp->rx_W = 0; |
| 380 | dsp->rx_R = 0; |
| 381 | break; |
| 382 | case DSP_VOL_CHANGE_TX: /* change volume */ |
| 383 | if (dsp->hdlc) { |
| 384 | ret = -EINVAL; |
| 385 | break; |
| 386 | } |
| 387 | if (len < sizeof(int)) { |
| 388 | ret = -EINVAL; |
| 389 | break; |
| 390 | } |
| 391 | dsp->tx_volume = *((int *)data); |
| 392 | if (dsp_debug & DEBUG_DSP_CORE) |
| 393 | printk(KERN_DEBUG "%s: change tx vol to %d\n", |
| 394 | __func__, dsp->tx_volume); |
| 395 | dsp_cmx_hardware(dsp->conf, dsp); |
| 396 | dsp_dtmf_hardware(dsp); |
| 397 | dsp_rx_off(dsp); |
| 398 | break; |
| 399 | case DSP_VOL_CHANGE_RX: /* change volume */ |
| 400 | if (dsp->hdlc) { |
| 401 | ret = -EINVAL; |
| 402 | break; |
| 403 | } |
| 404 | if (len < sizeof(int)) { |
| 405 | ret = -EINVAL; |
| 406 | break; |
| 407 | } |
| 408 | dsp->rx_volume = *((int *)data); |
| 409 | if (dsp_debug & DEBUG_DSP_CORE) |
| 410 | printk(KERN_DEBUG "%s: change rx vol to %d\n", |
| 411 | __func__, dsp->tx_volume); |
| 412 | dsp_cmx_hardware(dsp->conf, dsp); |
| 413 | dsp_dtmf_hardware(dsp); |
| 414 | dsp_rx_off(dsp); |
| 415 | break; |
| 416 | case DSP_ECHO_ON: /* enable echo */ |
| 417 | dsp->echo = 1; /* soft echo */ |
| 418 | if (dsp_debug & DEBUG_DSP_CORE) |
| 419 | printk(KERN_DEBUG "%s: enable cmx-echo\n", __func__); |
| 420 | dsp_cmx_hardware(dsp->conf, dsp); |
| 421 | dsp_rx_off(dsp); |
| 422 | if (dsp_debug & DEBUG_DSP_CMX) |
| 423 | dsp_cmx_debug(dsp); |
| 424 | break; |
| 425 | case DSP_ECHO_OFF: /* disable echo */ |
| 426 | dsp->echo = 0; |
| 427 | if (dsp_debug & DEBUG_DSP_CORE) |
| 428 | printk(KERN_DEBUG "%s: disable cmx-echo\n", __func__); |
| 429 | dsp_cmx_hardware(dsp->conf, dsp); |
| 430 | dsp_rx_off(dsp); |
| 431 | if (dsp_debug & DEBUG_DSP_CMX) |
| 432 | dsp_cmx_debug(dsp); |
| 433 | break; |
| 434 | case DSP_RECEIVE_ON: /* enable receive to user space */ |
| 435 | if (dsp_debug & DEBUG_DSP_CORE) |
| 436 | printk(KERN_DEBUG "%s: enable receive to user " |
| 437 | "space\n", __func__); |
| 438 | dsp->rx_disabled = 0; |
| 439 | dsp_rx_off(dsp); |
| 440 | break; |
| 441 | case DSP_RECEIVE_OFF: /* disable receive to user space */ |
| 442 | if (dsp_debug & DEBUG_DSP_CORE) |
| 443 | printk(KERN_DEBUG "%s: disable receive to " |
| 444 | "user space\n", __func__); |
| 445 | dsp->rx_disabled = 1; |
| 446 | dsp_rx_off(dsp); |
| 447 | break; |
| 448 | case DSP_MIX_ON: /* enable mixing of tx data */ |
| 449 | if (dsp->hdlc) { |
| 450 | ret = -EINVAL; |
| 451 | break; |
| 452 | } |
| 453 | if (dsp_debug & DEBUG_DSP_CORE) |
| 454 | printk(KERN_DEBUG "%s: enable mixing of " |
| 455 | "tx-data with conf mebers\n", __func__); |
| 456 | dsp->tx_mix = 1; |
| 457 | dsp_cmx_hardware(dsp->conf, dsp); |
| 458 | dsp_rx_off(dsp); |
| 459 | if (dsp_debug & DEBUG_DSP_CMX) |
| 460 | dsp_cmx_debug(dsp); |
| 461 | break; |
| 462 | case DSP_MIX_OFF: /* disable mixing of tx data */ |
| 463 | if (dsp->hdlc) { |
| 464 | ret = -EINVAL; |
| 465 | break; |
| 466 | } |
| 467 | if (dsp_debug & DEBUG_DSP_CORE) |
| 468 | printk(KERN_DEBUG "%s: disable mixing of " |
| 469 | "tx-data with conf mebers\n", __func__); |
| 470 | dsp->tx_mix = 0; |
| 471 | dsp_cmx_hardware(dsp->conf, dsp); |
| 472 | dsp_rx_off(dsp); |
| 473 | if (dsp_debug & DEBUG_DSP_CMX) |
| 474 | dsp_cmx_debug(dsp); |
| 475 | break; |
| 476 | case DSP_TXDATA_ON: /* enable txdata */ |
| 477 | dsp->tx_data = 1; |
| 478 | if (dsp_debug & DEBUG_DSP_CORE) |
| 479 | printk(KERN_DEBUG "%s: enable tx-data\n", __func__); |
| 480 | dsp_cmx_hardware(dsp->conf, dsp); |
| 481 | dsp_rx_off(dsp); |
| 482 | if (dsp_debug & DEBUG_DSP_CMX) |
| 483 | dsp_cmx_debug(dsp); |
| 484 | break; |
| 485 | case DSP_TXDATA_OFF: /* disable txdata */ |
| 486 | dsp->tx_data = 0; |
| 487 | if (dsp_debug & DEBUG_DSP_CORE) |
| 488 | printk(KERN_DEBUG "%s: disable tx-data\n", __func__); |
| 489 | dsp_cmx_hardware(dsp->conf, dsp); |
| 490 | dsp_rx_off(dsp); |
| 491 | if (dsp_debug & DEBUG_DSP_CMX) |
| 492 | dsp_cmx_debug(dsp); |
| 493 | break; |
| 494 | case DSP_DELAY: /* use delay algorithm instead of dynamic |
| 495 | jitter algorithm */ |
| 496 | if (dsp->hdlc) { |
| 497 | ret = -EINVAL; |
| 498 | break; |
| 499 | } |
| 500 | if (len < sizeof(int)) { |
| 501 | ret = -EINVAL; |
| 502 | break; |
| 503 | } |
| 504 | dsp->cmx_delay = (*((int *)data)) << 3; |
| 505 | /* miliseconds to samples */ |
| 506 | if (dsp->cmx_delay >= (CMX_BUFF_HALF>>1)) |
| 507 | /* clip to half of maximum usable buffer |
| 508 | (half of half buffer) */ |
| 509 | dsp->cmx_delay = (CMX_BUFF_HALF>>1) - 1; |
| 510 | if (dsp_debug & DEBUG_DSP_CORE) |
| 511 | printk(KERN_DEBUG "%s: use delay algorithm to " |
| 512 | "compensate jitter (%d samples)\n", |
| 513 | __func__, dsp->cmx_delay); |
| 514 | break; |
| 515 | case DSP_JITTER: /* use dynamic jitter algorithm instead of |
| 516 | delay algorithm */ |
| 517 | if (dsp->hdlc) { |
| 518 | ret = -EINVAL; |
| 519 | break; |
| 520 | } |
| 521 | dsp->cmx_delay = 0; |
| 522 | if (dsp_debug & DEBUG_DSP_CORE) |
| 523 | printk(KERN_DEBUG "%s: use jitter algorithm to " |
| 524 | "compensate jitter\n", __func__); |
| 525 | break; |
| 526 | case DSP_TX_DEJITTER: /* use dynamic jitter algorithm for tx-buffer */ |
| 527 | if (dsp->hdlc) { |
| 528 | ret = -EINVAL; |
| 529 | break; |
| 530 | } |
| 531 | dsp->tx_dejitter = 1; |
| 532 | if (dsp_debug & DEBUG_DSP_CORE) |
| 533 | printk(KERN_DEBUG "%s: use dejitter on TX " |
| 534 | "buffer\n", __func__); |
| 535 | break; |
| 536 | case DSP_TX_DEJ_OFF: /* use tx-buffer without dejittering*/ |
| 537 | if (dsp->hdlc) { |
| 538 | ret = -EINVAL; |
| 539 | break; |
| 540 | } |
| 541 | dsp->tx_dejitter = 0; |
| 542 | if (dsp_debug & DEBUG_DSP_CORE) |
| 543 | printk(KERN_DEBUG "%s: use TX buffer without " |
| 544 | "dejittering\n", __func__); |
| 545 | break; |
| 546 | case DSP_PIPELINE_CFG: |
| 547 | if (dsp->hdlc) { |
| 548 | ret = -EINVAL; |
| 549 | break; |
| 550 | } |
| 551 | if (len > 0 && ((char *)data)[len - 1]) { |
| 552 | printk(KERN_DEBUG "%s: pipeline config string " |
| 553 | "is not NULL terminated!\n", __func__); |
| 554 | ret = -EINVAL; |
| 555 | } else { |
| 556 | dsp->pipeline.inuse = 1; |
| 557 | dsp_cmx_hardware(dsp->conf, dsp); |
| 558 | ret = dsp_pipeline_build(&dsp->pipeline, |
| 559 | len > 0 ? (char *)data : NULL); |
| 560 | dsp_cmx_hardware(dsp->conf, dsp); |
| 561 | dsp_rx_off(dsp); |
| 562 | } |
| 563 | break; |
| 564 | case DSP_BF_ENABLE_KEY: /* turn blowfish on */ |
| 565 | if (dsp->hdlc) { |
| 566 | ret = -EINVAL; |
| 567 | break; |
| 568 | } |
| 569 | if (len < 4 || len > 56) { |
| 570 | ret = -EINVAL; |
| 571 | break; |
| 572 | } |
| 573 | if (dsp_debug & DEBUG_DSP_CORE) |
| 574 | printk(KERN_DEBUG "%s: turn blowfish on (key " |
| 575 | "not shown)\n", __func__); |
| 576 | ret = dsp_bf_init(dsp, (u8 *)data, len); |
| 577 | /* set new cont */ |
| 578 | if (!ret) |
| 579 | cont = DSP_BF_ACCEPT; |
| 580 | else |
| 581 | cont = DSP_BF_REJECT; |
| 582 | /* send indication if it worked to set it */ |
| 583 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, MISDN_ID_ANY, |
| 584 | sizeof(int), &cont, GFP_ATOMIC); |
| 585 | if (nskb) { |
| 586 | if (dsp->up) { |
| 587 | if (dsp->up->send(dsp->up, nskb)) |
| 588 | dev_kfree_skb(nskb); |
| 589 | } else |
| 590 | dev_kfree_skb(nskb); |
| 591 | } |
| 592 | if (!ret) { |
| 593 | dsp_cmx_hardware(dsp->conf, dsp); |
| 594 | dsp_dtmf_hardware(dsp); |
| 595 | dsp_rx_off(dsp); |
| 596 | } |
| 597 | break; |
| 598 | case DSP_BF_DISABLE: /* turn blowfish off */ |
| 599 | if (dsp->hdlc) { |
| 600 | ret = -EINVAL; |
| 601 | break; |
| 602 | } |
| 603 | if (dsp_debug & DEBUG_DSP_CORE) |
| 604 | printk(KERN_DEBUG "%s: turn blowfish off\n", __func__); |
| 605 | dsp_bf_cleanup(dsp); |
| 606 | dsp_cmx_hardware(dsp->conf, dsp); |
| 607 | dsp_dtmf_hardware(dsp); |
| 608 | dsp_rx_off(dsp); |
| 609 | break; |
| 610 | default: |
| 611 | if (dsp_debug & DEBUG_DSP_CORE) |
| 612 | printk(KERN_DEBUG "%s: ctrl req %x unhandled\n", |
| 613 | __func__, cont); |
| 614 | ret = -EINVAL; |
| 615 | } |
| 616 | return ret; |
| 617 | } |
| 618 | |
| 619 | static void |
| 620 | get_features(struct mISDNchannel *ch) |
| 621 | { |
| 622 | struct dsp *dsp = container_of(ch, struct dsp, ch); |
| 623 | struct mISDN_ctrl_req cq; |
| 624 | |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 625 | if (!ch->peer) { |
| 626 | if (dsp_debug & DEBUG_DSP_CORE) |
| 627 | printk(KERN_DEBUG "%s: no peer, no features\n", |
| 628 | __func__); |
| 629 | return; |
| 630 | } |
| 631 | memset(&cq, 0, sizeof(cq)); |
| 632 | cq.op = MISDN_CTRL_GETOP; |
| 633 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq) < 0) { |
| 634 | printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n", |
| 635 | __func__); |
| 636 | return; |
| 637 | } |
| 638 | if (cq.op & MISDN_CTRL_RX_OFF) |
| 639 | dsp->features_rx_off = 1; |
Andreas Eversberg | 8dd2f36 | 2008-08-02 22:51:52 +0200 | [diff] [blame] | 640 | if (cq.op & MISDN_CTRL_FILL_EMPTY) |
| 641 | dsp->features_fill_empty = 1; |
| 642 | if (dsp_options & DSP_OPT_NOHARDWARE) |
| 643 | return; |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 644 | if ((cq.op & MISDN_CTRL_HW_FEATURES_OP)) { |
| 645 | cq.op = MISDN_CTRL_HW_FEATURES; |
| 646 | *((u_long *)&cq.p1) = (u_long)&dsp->features; |
| 647 | if (ch->peer->ctrl(ch->peer, CONTROL_CHANNEL, &cq)) { |
| 648 | printk(KERN_DEBUG "%s: 2nd CONTROL_CHANNEL failed\n", |
| 649 | __func__); |
| 650 | } |
| 651 | } else |
| 652 | if (dsp_debug & DEBUG_DSP_CORE) |
| 653 | printk(KERN_DEBUG "%s: features not supported for %s\n", |
| 654 | __func__, dsp->name); |
| 655 | } |
| 656 | |
| 657 | static int |
| 658 | dsp_function(struct mISDNchannel *ch, struct sk_buff *skb) |
| 659 | { |
| 660 | struct dsp *dsp = container_of(ch, struct dsp, ch); |
| 661 | struct mISDNhead *hh; |
| 662 | int ret = 0; |
| 663 | u8 *digits; |
| 664 | int cont; |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 665 | u_long flags; |
| 666 | |
| 667 | hh = mISDN_HEAD_P(skb); |
| 668 | switch (hh->prim) { |
| 669 | /* FROM DOWN */ |
| 670 | case (PH_DATA_CNF): |
| 671 | dsp->data_pending = 0; |
| 672 | /* trigger next hdlc frame, if any */ |
| 673 | if (dsp->hdlc) { |
| 674 | spin_lock_irqsave(&dsp_lock, flags); |
| 675 | if (dsp->b_active) |
| 676 | schedule_work(&dsp->workq); |
| 677 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 678 | } |
| 679 | break; |
| 680 | case (PH_DATA_IND): |
| 681 | case (DL_DATA_IND): |
| 682 | if (skb->len < 1) { |
| 683 | ret = -EINVAL; |
| 684 | break; |
| 685 | } |
| 686 | if (dsp->rx_is_off) { |
| 687 | if (dsp_debug & DEBUG_DSP_CORE) |
| 688 | printk(KERN_DEBUG "%s: rx-data during rx_off" |
| 689 | " for %s\n", |
| 690 | __func__, dsp->name); |
| 691 | } |
| 692 | if (dsp->hdlc) { |
| 693 | /* hdlc */ |
| 694 | spin_lock_irqsave(&dsp_lock, flags); |
| 695 | dsp_cmx_hdlc(dsp, skb); |
| 696 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 697 | if (dsp->rx_disabled) { |
| 698 | /* if receive is not allowed */ |
| 699 | break; |
| 700 | } |
| 701 | hh->prim = DL_DATA_IND; |
| 702 | if (dsp->up) |
| 703 | return dsp->up->send(dsp->up, skb); |
| 704 | break; |
| 705 | } |
| 706 | |
| 707 | /* decrypt if enabled */ |
| 708 | if (dsp->bf_enable) |
| 709 | dsp_bf_decrypt(dsp, skb->data, skb->len); |
| 710 | /* pipeline */ |
| 711 | if (dsp->pipeline.inuse) |
| 712 | dsp_pipeline_process_rx(&dsp->pipeline, skb->data, |
| 713 | skb->len); |
| 714 | /* change volume if requested */ |
| 715 | if (dsp->rx_volume) |
| 716 | dsp_change_volume(skb, dsp->rx_volume); |
| 717 | |
| 718 | /* check if dtmf soft decoding is turned on */ |
| 719 | if (dsp->dtmf.software) { |
| 720 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, |
| 721 | skb->len, (dsp_options&DSP_OPT_ULAW)?1:0); |
| 722 | while (*digits) { |
Hannes Eder | bb68b1d | 2008-12-12 21:16:58 -0800 | [diff] [blame] | 723 | struct sk_buff *nskb; |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 724 | if (dsp_debug & DEBUG_DSP_DTMF) |
| 725 | printk(KERN_DEBUG "%s: digit" |
| 726 | "(%c) to layer %s\n", |
| 727 | __func__, *digits, dsp->name); |
| 728 | cont = DTMF_TONE_VAL | *digits; |
| 729 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, |
| 730 | MISDN_ID_ANY, sizeof(int), &cont, |
| 731 | GFP_ATOMIC); |
| 732 | if (nskb) { |
| 733 | if (dsp->up) { |
| 734 | if (dsp->up->send( |
| 735 | dsp->up, nskb)) |
| 736 | dev_kfree_skb(nskb); |
| 737 | } else |
| 738 | dev_kfree_skb(nskb); |
| 739 | } |
| 740 | digits++; |
| 741 | } |
| 742 | } |
| 743 | /* we need to process receive data if software */ |
| 744 | spin_lock_irqsave(&dsp_lock, flags); |
| 745 | if (dsp->pcm_slot_tx < 0 && dsp->pcm_slot_rx < 0) { |
| 746 | /* process data from card at cmx */ |
| 747 | dsp_cmx_receive(dsp, skb); |
| 748 | } |
| 749 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 750 | |
| 751 | if (dsp->rx_disabled) { |
| 752 | /* if receive is not allowed */ |
| 753 | break; |
| 754 | } |
| 755 | hh->prim = DL_DATA_IND; |
| 756 | if (dsp->up) |
| 757 | return dsp->up->send(dsp->up, skb); |
| 758 | break; |
| 759 | case (PH_CONTROL_IND): |
| 760 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) |
| 761 | printk(KERN_DEBUG "%s: PH_CONTROL INDICATION " |
| 762 | "received: %x (len %d) %s\n", __func__, |
| 763 | hh->id, skb->len, dsp->name); |
| 764 | switch (hh->id) { |
| 765 | case (DTMF_HFC_COEF): /* getting coefficients */ |
| 766 | if (!dsp->dtmf.hardware) { |
| 767 | if (dsp_debug & DEBUG_DSP_DTMFCOEFF) |
| 768 | printk(KERN_DEBUG "%s: ignoring DTMF " |
| 769 | "coefficients from HFC\n", |
| 770 | __func__); |
| 771 | break; |
| 772 | } |
| 773 | digits = dsp_dtmf_goertzel_decode(dsp, skb->data, |
| 774 | skb->len, 2); |
| 775 | while (*digits) { |
| 776 | int k; |
| 777 | struct sk_buff *nskb; |
| 778 | if (dsp_debug & DEBUG_DSP_DTMF) |
| 779 | printk(KERN_DEBUG "%s: digit" |
| 780 | "(%c) to layer %s\n", |
| 781 | __func__, *digits, dsp->name); |
| 782 | k = *digits | DTMF_TONE_VAL; |
| 783 | nskb = _alloc_mISDN_skb(PH_CONTROL_IND, |
| 784 | MISDN_ID_ANY, sizeof(int), &k, |
| 785 | GFP_ATOMIC); |
| 786 | if (nskb) { |
| 787 | if (dsp->up) { |
| 788 | if (dsp->up->send( |
| 789 | dsp->up, nskb)) |
| 790 | dev_kfree_skb(nskb); |
| 791 | } else |
| 792 | dev_kfree_skb(nskb); |
| 793 | } |
| 794 | digits++; |
| 795 | } |
| 796 | break; |
| 797 | case (HFC_VOL_CHANGE_TX): /* change volume */ |
| 798 | if (skb->len != sizeof(int)) { |
| 799 | ret = -EINVAL; |
| 800 | break; |
| 801 | } |
| 802 | spin_lock_irqsave(&dsp_lock, flags); |
| 803 | dsp->tx_volume = *((int *)skb->data); |
| 804 | if (dsp_debug & DEBUG_DSP_CORE) |
| 805 | printk(KERN_DEBUG "%s: change tx volume to " |
| 806 | "%d\n", __func__, dsp->tx_volume); |
| 807 | dsp_cmx_hardware(dsp->conf, dsp); |
| 808 | dsp_dtmf_hardware(dsp); |
| 809 | dsp_rx_off(dsp); |
| 810 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 811 | break; |
| 812 | default: |
| 813 | if (dsp_debug & DEBUG_DSP_CORE) |
| 814 | printk(KERN_DEBUG "%s: ctrl ind %x unhandled " |
| 815 | "%s\n", __func__, hh->id, dsp->name); |
| 816 | ret = -EINVAL; |
| 817 | } |
| 818 | break; |
| 819 | case (PH_ACTIVATE_IND): |
| 820 | case (PH_ACTIVATE_CNF): |
| 821 | if (dsp_debug & DEBUG_DSP_CORE) |
| 822 | printk(KERN_DEBUG "%s: b_channel is now active %s\n", |
| 823 | __func__, dsp->name); |
| 824 | /* bchannel now active */ |
| 825 | spin_lock_irqsave(&dsp_lock, flags); |
| 826 | dsp->b_active = 1; |
| 827 | dsp->data_pending = 0; |
| 828 | dsp->rx_init = 1; |
| 829 | /* rx_W and rx_R will be adjusted on first frame */ |
| 830 | dsp->rx_W = 0; |
| 831 | dsp->rx_R = 0; |
| 832 | memset(dsp->rx_buff, 0, sizeof(dsp->rx_buff)); |
| 833 | dsp_cmx_hardware(dsp->conf, dsp); |
| 834 | dsp_dtmf_hardware(dsp); |
| 835 | dsp_rx_off(dsp); |
| 836 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 837 | if (dsp_debug & DEBUG_DSP_CORE) |
| 838 | printk(KERN_DEBUG "%s: done with activation, sending " |
| 839 | "confirm to user space. %s\n", __func__, |
| 840 | dsp->name); |
| 841 | /* send activation to upper layer */ |
| 842 | hh->prim = DL_ESTABLISH_CNF; |
| 843 | if (dsp->up) |
| 844 | return dsp->up->send(dsp->up, skb); |
| 845 | break; |
| 846 | case (PH_DEACTIVATE_IND): |
| 847 | case (PH_DEACTIVATE_CNF): |
| 848 | if (dsp_debug & DEBUG_DSP_CORE) |
| 849 | printk(KERN_DEBUG "%s: b_channel is now inactive %s\n", |
| 850 | __func__, dsp->name); |
| 851 | /* bchannel now inactive */ |
| 852 | spin_lock_irqsave(&dsp_lock, flags); |
| 853 | dsp->b_active = 0; |
| 854 | dsp->data_pending = 0; |
| 855 | dsp_cmx_hardware(dsp->conf, dsp); |
| 856 | dsp_rx_off(dsp); |
| 857 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 858 | hh->prim = DL_RELEASE_CNF; |
| 859 | if (dsp->up) |
| 860 | return dsp->up->send(dsp->up, skb); |
| 861 | break; |
| 862 | /* FROM UP */ |
| 863 | case (DL_DATA_REQ): |
| 864 | case (PH_DATA_REQ): |
| 865 | if (skb->len < 1) { |
| 866 | ret = -EINVAL; |
| 867 | break; |
| 868 | } |
| 869 | if (dsp->hdlc) { |
| 870 | /* hdlc */ |
Peter Schlaile | e4cce22 | 2008-08-22 19:44:21 +0200 | [diff] [blame] | 871 | if (!dsp->b_active) { |
| 872 | ret = -EIO; |
| 873 | break; |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 874 | } |
Peter Schlaile | e4cce22 | 2008-08-22 19:44:21 +0200 | [diff] [blame] | 875 | hh->prim = PH_DATA_REQ; |
| 876 | spin_lock_irqsave(&dsp_lock, flags); |
| 877 | skb_queue_tail(&dsp->sendq, skb); |
| 878 | schedule_work(&dsp->workq); |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 879 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 880 | return 0; |
| 881 | } |
| 882 | /* send data to tx-buffer (if no tone is played) */ |
| 883 | if (!dsp->tone.tone) { |
| 884 | spin_lock_irqsave(&dsp_lock, flags); |
| 885 | dsp_cmx_transmit(dsp, skb); |
| 886 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 887 | } |
| 888 | break; |
| 889 | case (PH_CONTROL_REQ): |
| 890 | spin_lock_irqsave(&dsp_lock, flags); |
| 891 | ret = dsp_control_req(dsp, hh, skb); |
| 892 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 893 | break; |
| 894 | case (DL_ESTABLISH_REQ): |
| 895 | case (PH_ACTIVATE_REQ): |
| 896 | if (dsp_debug & DEBUG_DSP_CORE) |
| 897 | printk(KERN_DEBUG "%s: activating b_channel %s\n", |
| 898 | __func__, dsp->name); |
| 899 | if (dsp->dtmf.hardware || dsp->dtmf.software) |
| 900 | dsp_dtmf_goertzel_init(dsp); |
| 901 | get_features(ch); |
Andreas Eversberg | 8dd2f36 | 2008-08-02 22:51:52 +0200 | [diff] [blame] | 902 | /* enable fill_empty feature */ |
| 903 | if (dsp->features_fill_empty) |
| 904 | dsp_fill_empty(dsp); |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 905 | /* send ph_activate */ |
| 906 | hh->prim = PH_ACTIVATE_REQ; |
| 907 | if (ch->peer) |
| 908 | return ch->recv(ch->peer, skb); |
| 909 | break; |
| 910 | case (DL_RELEASE_REQ): |
| 911 | case (PH_DEACTIVATE_REQ): |
| 912 | if (dsp_debug & DEBUG_DSP_CORE) |
| 913 | printk(KERN_DEBUG "%s: releasing b_channel %s\n", |
| 914 | __func__, dsp->name); |
| 915 | spin_lock_irqsave(&dsp_lock, flags); |
| 916 | dsp->tone.tone = 0; |
| 917 | dsp->tone.hardware = 0; |
| 918 | dsp->tone.software = 0; |
| 919 | if (timer_pending(&dsp->tone.tl)) |
| 920 | del_timer(&dsp->tone.tl); |
| 921 | if (dsp->conf) |
| 922 | dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be |
| 923 | called here */ |
| 924 | skb_queue_purge(&dsp->sendq); |
| 925 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 926 | hh->prim = PH_DEACTIVATE_REQ; |
| 927 | if (ch->peer) |
| 928 | return ch->recv(ch->peer, skb); |
| 929 | break; |
| 930 | default: |
| 931 | if (dsp_debug & DEBUG_DSP_CORE) |
| 932 | printk(KERN_DEBUG "%s: msg %x unhandled %s\n", |
| 933 | __func__, hh->prim, dsp->name); |
| 934 | ret = -EINVAL; |
| 935 | } |
| 936 | if (!ret) |
| 937 | dev_kfree_skb(skb); |
| 938 | return ret; |
| 939 | } |
| 940 | |
| 941 | static int |
| 942 | dsp_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) |
| 943 | { |
| 944 | struct dsp *dsp = container_of(ch, struct dsp, ch); |
| 945 | u_long flags; |
| 946 | int err = 0; |
| 947 | |
| 948 | if (debug & DEBUG_DSP_CTRL) |
| 949 | printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd); |
| 950 | |
| 951 | switch (cmd) { |
| 952 | case OPEN_CHANNEL: |
| 953 | break; |
| 954 | case CLOSE_CHANNEL: |
| 955 | if (dsp->ch.peer) |
| 956 | dsp->ch.peer->ctrl(dsp->ch.peer, CLOSE_CHANNEL, NULL); |
| 957 | |
| 958 | /* wait until workqueue has finished, |
| 959 | * must lock here, or we may hit send-process currently |
| 960 | * queueing. */ |
| 961 | spin_lock_irqsave(&dsp_lock, flags); |
| 962 | dsp->b_active = 0; |
| 963 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 964 | /* MUST not be locked, because it waits until queue is done. */ |
| 965 | cancel_work_sync(&dsp->workq); |
| 966 | spin_lock_irqsave(&dsp_lock, flags); |
| 967 | if (timer_pending(&dsp->tone.tl)) |
| 968 | del_timer(&dsp->tone.tl); |
| 969 | skb_queue_purge(&dsp->sendq); |
| 970 | if (dsp_debug & DEBUG_DSP_CTRL) |
| 971 | printk(KERN_DEBUG "%s: releasing member %s\n", |
| 972 | __func__, dsp->name); |
| 973 | dsp->b_active = 0; |
| 974 | dsp_cmx_conf(dsp, 0); /* dsp_cmx_hardware will also be called |
| 975 | here */ |
| 976 | dsp_pipeline_destroy(&dsp->pipeline); |
| 977 | |
| 978 | if (dsp_debug & DEBUG_DSP_CTRL) |
| 979 | printk(KERN_DEBUG "%s: remove & destroy object %s\n", |
| 980 | __func__, dsp->name); |
| 981 | list_del(&dsp->list); |
| 982 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 983 | |
| 984 | if (dsp_debug & DEBUG_DSP_CTRL) |
| 985 | printk(KERN_DEBUG "%s: dsp instance released\n", |
| 986 | __func__); |
| 987 | vfree(dsp); |
| 988 | module_put(THIS_MODULE); |
| 989 | break; |
| 990 | } |
| 991 | return err; |
| 992 | } |
| 993 | |
| 994 | static void |
| 995 | dsp_send_bh(struct work_struct *work) |
| 996 | { |
| 997 | struct dsp *dsp = container_of(work, struct dsp, workq); |
| 998 | struct sk_buff *skb; |
| 999 | struct mISDNhead *hh; |
| 1000 | |
| 1001 | if (dsp->hdlc && dsp->data_pending) |
| 1002 | return; /* wait until data has been acknowledged */ |
| 1003 | |
| 1004 | /* send queued data */ |
| 1005 | while ((skb = skb_dequeue(&dsp->sendq))) { |
| 1006 | /* in locked date, we must have still data in queue */ |
| 1007 | if (dsp->data_pending) { |
| 1008 | if (dsp_debug & DEBUG_DSP_CORE) |
| 1009 | printk(KERN_DEBUG "%s: fifo full %s, this is " |
| 1010 | "no bug!\n", __func__, dsp->name); |
| 1011 | /* flush transparent data, if not acked */ |
| 1012 | dev_kfree_skb(skb); |
| 1013 | continue; |
| 1014 | } |
| 1015 | hh = mISDN_HEAD_P(skb); |
| 1016 | if (hh->prim == DL_DATA_REQ) { |
| 1017 | /* send packet up */ |
| 1018 | if (dsp->up) { |
| 1019 | if (dsp->up->send(dsp->up, skb)) |
| 1020 | dev_kfree_skb(skb); |
| 1021 | } else |
| 1022 | dev_kfree_skb(skb); |
| 1023 | } else { |
| 1024 | /* send packet down */ |
| 1025 | if (dsp->ch.peer) { |
| 1026 | dsp->data_pending = 1; |
| 1027 | if (dsp->ch.recv(dsp->ch.peer, skb)) { |
| 1028 | dev_kfree_skb(skb); |
| 1029 | dsp->data_pending = 0; |
| 1030 | } |
| 1031 | } else |
| 1032 | dev_kfree_skb(skb); |
| 1033 | } |
| 1034 | } |
| 1035 | } |
| 1036 | |
| 1037 | static int |
| 1038 | dspcreate(struct channel_req *crq) |
| 1039 | { |
| 1040 | struct dsp *ndsp; |
| 1041 | u_long flags; |
| 1042 | |
| 1043 | if (crq->protocol != ISDN_P_B_L2DSP |
| 1044 | && crq->protocol != ISDN_P_B_L2DSPHDLC) |
| 1045 | return -EPROTONOSUPPORT; |
| 1046 | ndsp = vmalloc(sizeof(struct dsp)); |
| 1047 | if (!ndsp) { |
| 1048 | printk(KERN_ERR "%s: vmalloc struct dsp failed\n", __func__); |
| 1049 | return -ENOMEM; |
| 1050 | } |
| 1051 | memset(ndsp, 0, sizeof(struct dsp)); |
| 1052 | if (dsp_debug & DEBUG_DSP_CTRL) |
| 1053 | printk(KERN_DEBUG "%s: creating new dsp instance\n", __func__); |
| 1054 | |
| 1055 | /* default enabled */ |
| 1056 | INIT_WORK(&ndsp->workq, (void *)dsp_send_bh); |
| 1057 | skb_queue_head_init(&ndsp->sendq); |
| 1058 | ndsp->ch.send = dsp_function; |
| 1059 | ndsp->ch.ctrl = dsp_ctrl; |
| 1060 | ndsp->up = crq->ch; |
| 1061 | crq->ch = &ndsp->ch; |
| 1062 | if (crq->protocol == ISDN_P_B_L2DSP) { |
| 1063 | crq->protocol = ISDN_P_B_RAW; |
| 1064 | ndsp->hdlc = 0; |
| 1065 | } else { |
| 1066 | crq->protocol = ISDN_P_B_HDLC; |
| 1067 | ndsp->hdlc = 1; |
| 1068 | } |
| 1069 | if (!try_module_get(THIS_MODULE)) |
| 1070 | printk(KERN_WARNING "%s:cannot get module\n", |
| 1071 | __func__); |
| 1072 | |
| 1073 | sprintf(ndsp->name, "DSP_C%x(0x%p)", |
| 1074 | ndsp->up->st->dev->id + 1, ndsp); |
| 1075 | /* set frame size to start */ |
| 1076 | ndsp->features.hfc_id = -1; /* current PCM id */ |
| 1077 | ndsp->features.pcm_id = -1; /* current PCM id */ |
| 1078 | ndsp->pcm_slot_rx = -1; /* current CPM slot */ |
| 1079 | ndsp->pcm_slot_tx = -1; |
| 1080 | ndsp->pcm_bank_rx = -1; |
| 1081 | ndsp->pcm_bank_tx = -1; |
| 1082 | ndsp->hfc_conf = -1; /* current conference number */ |
| 1083 | /* set tone timer */ |
| 1084 | ndsp->tone.tl.function = (void *)dsp_tone_timeout; |
| 1085 | ndsp->tone.tl.data = (long) ndsp; |
| 1086 | init_timer(&ndsp->tone.tl); |
| 1087 | |
| 1088 | if (dtmfthreshold < 20 || dtmfthreshold > 500) |
| 1089 | dtmfthreshold = 200; |
| 1090 | ndsp->dtmf.treshold = dtmfthreshold*10000; |
| 1091 | |
| 1092 | /* init pipeline append to list */ |
| 1093 | spin_lock_irqsave(&dsp_lock, flags); |
| 1094 | dsp_pipeline_init(&ndsp->pipeline); |
| 1095 | list_add_tail(&ndsp->list, &dsp_ilist); |
| 1096 | spin_unlock_irqrestore(&dsp_lock, flags); |
| 1097 | |
| 1098 | return 0; |
| 1099 | } |
| 1100 | |
| 1101 | |
| 1102 | static struct Bprotocol DSP = { |
| 1103 | .Bprotocols = (1 << (ISDN_P_B_L2DSP & ISDN_P_B_MASK)) |
| 1104 | | (1 << (ISDN_P_B_L2DSPHDLC & ISDN_P_B_MASK)), |
| 1105 | .name = "dsp", |
| 1106 | .create = dspcreate |
| 1107 | }; |
| 1108 | |
| 1109 | static int dsp_init(void) |
| 1110 | { |
| 1111 | int err; |
| 1112 | int tics; |
| 1113 | |
| 1114 | printk(KERN_INFO "DSP modul %s\n", mISDN_dsp_revision); |
| 1115 | |
| 1116 | dsp_options = options; |
| 1117 | dsp_debug = debug; |
| 1118 | |
| 1119 | /* set packet size */ |
| 1120 | dsp_poll = poll; |
| 1121 | if (dsp_poll) { |
| 1122 | if (dsp_poll > MAX_POLL) { |
| 1123 | printk(KERN_ERR "%s: Wrong poll value (%d), use %d " |
| 1124 | "maximum.\n", __func__, poll, MAX_POLL); |
| 1125 | err = -EINVAL; |
| 1126 | return err; |
| 1127 | } |
| 1128 | if (dsp_poll < 8) { |
| 1129 | printk(KERN_ERR "%s: Wrong poll value (%d), use 8 " |
| 1130 | "minimum.\n", __func__, dsp_poll); |
| 1131 | err = -EINVAL; |
| 1132 | return err; |
| 1133 | } |
| 1134 | dsp_tics = poll * HZ / 8000; |
| 1135 | if (dsp_tics * 8000 != poll * HZ) { |
| 1136 | printk(KERN_INFO "mISDN_dsp: Cannot clock every %d " |
| 1137 | "samples (0,125 ms). It is not a multiple of " |
| 1138 | "%d HZ.\n", poll, HZ); |
| 1139 | err = -EINVAL; |
| 1140 | return err; |
| 1141 | } |
| 1142 | } else { |
| 1143 | poll = 8; |
| 1144 | while (poll <= MAX_POLL) { |
Andreas Eversberg | 400fd97 | 2008-10-11 08:13:29 +0200 | [diff] [blame] | 1145 | tics = (poll * HZ) / 8000; |
Karsten Keil | 960366c | 2008-07-27 01:56:38 +0200 | [diff] [blame] | 1146 | if (tics * 8000 == poll * HZ) { |
| 1147 | dsp_tics = tics; |
| 1148 | dsp_poll = poll; |
| 1149 | if (poll >= 64) |
| 1150 | break; |
| 1151 | } |
| 1152 | poll++; |
| 1153 | } |
| 1154 | } |
| 1155 | if (dsp_poll == 0) { |
| 1156 | printk(KERN_INFO "mISDN_dsp: There is no multiple of kernel " |
| 1157 | "clock that equals exactly the duration of 8-256 " |
| 1158 | "samples. (Choose kernel clock speed like 100, 250, " |
| 1159 | "300, 1000)\n"); |
| 1160 | err = -EINVAL; |
| 1161 | return err; |
| 1162 | } |
| 1163 | printk(KERN_INFO "mISDN_dsp: DSP clocks every %d samples. This equals " |
| 1164 | "%d jiffies.\n", dsp_poll, dsp_tics); |
| 1165 | |
| 1166 | spin_lock_init(&dsp_lock); |
| 1167 | INIT_LIST_HEAD(&dsp_ilist); |
| 1168 | INIT_LIST_HEAD(&conf_ilist); |
| 1169 | |
| 1170 | /* init conversion tables */ |
| 1171 | dsp_audio_generate_law_tables(); |
| 1172 | dsp_silence = (dsp_options&DSP_OPT_ULAW)?0xff:0x2a; |
| 1173 | dsp_audio_law_to_s32 = (dsp_options&DSP_OPT_ULAW)?dsp_audio_ulaw_to_s32: |
| 1174 | dsp_audio_alaw_to_s32; |
| 1175 | dsp_audio_generate_s2law_table(); |
| 1176 | dsp_audio_generate_seven(); |
| 1177 | dsp_audio_generate_mix_table(); |
| 1178 | if (dsp_options & DSP_OPT_ULAW) |
| 1179 | dsp_audio_generate_ulaw_samples(); |
| 1180 | dsp_audio_generate_volume_changes(); |
| 1181 | |
| 1182 | err = dsp_pipeline_module_init(); |
| 1183 | if (err) { |
| 1184 | printk(KERN_ERR "mISDN_dsp: Can't initialize pipeline, " |
| 1185 | "error(%d)\n", err); |
| 1186 | return err; |
| 1187 | } |
| 1188 | |
| 1189 | err = mISDN_register_Bprotocol(&DSP); |
| 1190 | if (err) { |
| 1191 | printk(KERN_ERR "Can't register %s error(%d)\n", DSP.name, err); |
| 1192 | return err; |
| 1193 | } |
| 1194 | |
| 1195 | /* set sample timer */ |
| 1196 | dsp_spl_tl.function = (void *)dsp_cmx_send; |
| 1197 | dsp_spl_tl.data = 0; |
| 1198 | init_timer(&dsp_spl_tl); |
| 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 | |
| 1207 | static void dsp_cleanup(void) |
| 1208 | { |
| 1209 | mISDN_unregister_Bprotocol(&DSP); |
| 1210 | |
| 1211 | if (timer_pending(&dsp_spl_tl)) |
| 1212 | del_timer(&dsp_spl_tl); |
| 1213 | |
| 1214 | if (!list_empty(&dsp_ilist)) { |
| 1215 | printk(KERN_ERR "mISDN_dsp: Audio DSP object inst list not " |
| 1216 | "empty.\n"); |
| 1217 | } |
| 1218 | if (!list_empty(&conf_ilist)) { |
| 1219 | printk(KERN_ERR "mISDN_dsp: Conference list not empty. Not " |
| 1220 | "all memory freed.\n"); |
| 1221 | } |
| 1222 | |
| 1223 | dsp_pipeline_module_exit(); |
| 1224 | } |
| 1225 | |
| 1226 | module_init(dsp_init); |
| 1227 | module_exit(dsp_cleanup); |
| 1228 | |