1 /* 2 * Copyright (c) 2006-2008 Daniel Mack, Karsten Wiese 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 19 #include <linux/device.h> 20 #include <linux/spinlock.h> 21 #include <linux/slab.h> 22 #include <linux/init.h> 23 #include <linux/usb.h> 24 #include <sound/core.h> 25 #include <sound/pcm.h> 26 27 #include "device.h" 28 #include "audio.h" 29 30 #define N_URBS 32 31 #define CLOCK_DRIFT_TOLERANCE 5 32 #define FRAMES_PER_URB 8 33 #define BYTES_PER_FRAME 512 34 #define CHANNELS_PER_STREAM 2 35 #define BYTES_PER_SAMPLE 3 36 #define BYTES_PER_SAMPLE_USB 4 37 #define MAX_BUFFER_SIZE (128*1024) 38 #define MAX_ENDPOINT_SIZE 512 39 40 #define ENDPOINT_CAPTURE 2 41 #define ENDPOINT_PLAYBACK 6 42 43 #define MAKE_CHECKBYTE(cdev,stream,i) \ 44 (stream << 1) | (~(i / (cdev->n_streams * BYTES_PER_SAMPLE_USB)) & 1) 45 46 static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = { 47 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 48 SNDRV_PCM_INFO_BLOCK_TRANSFER), 49 .formats = SNDRV_PCM_FMTBIT_S24_3BE, 50 .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | 51 SNDRV_PCM_RATE_96000), 52 .rate_min = 44100, 53 .rate_max = 0, /* will overwrite later */ 54 .channels_min = CHANNELS_PER_STREAM, 55 .channels_max = CHANNELS_PER_STREAM, 56 .buffer_bytes_max = MAX_BUFFER_SIZE, 57 .period_bytes_min = 128, 58 .period_bytes_max = MAX_BUFFER_SIZE, 59 .periods_min = 1, 60 .periods_max = 1024, 61 }; 62 63 static void 64 activate_substream(struct snd_usb_caiaqdev *cdev, 65 struct snd_pcm_substream *sub) 66 { 67 spin_lock(&cdev->spinlock); 68 69 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) 70 cdev->sub_playback[sub->number] = sub; 71 else 72 cdev->sub_capture[sub->number] = sub; 73 74 spin_unlock(&cdev->spinlock); 75 } 76 77 static void 78 deactivate_substream(struct snd_usb_caiaqdev *cdev, 79 struct snd_pcm_substream *sub) 80 { 81 unsigned long flags; 82 spin_lock_irqsave(&cdev->spinlock, flags); 83 84 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) 85 cdev->sub_playback[sub->number] = NULL; 86 else 87 cdev->sub_capture[sub->number] = NULL; 88 89 spin_unlock_irqrestore(&cdev->spinlock, flags); 90 } 91 92 static int 93 all_substreams_zero(struct snd_pcm_substream **subs) 94 { 95 int i; 96 for (i = 0; i < MAX_STREAMS; i++) 97 if (subs[i] != NULL) 98 return 0; 99 return 1; 100 } 101 102 static int stream_start(struct snd_usb_caiaqdev *cdev) 103 { 104 int i, ret; 105 struct device *dev = caiaqdev_to_dev(cdev); 106 107 dev_dbg(dev, "%s(%p)\n", __func__, cdev); 108 109 if (cdev->streaming) 110 return -EINVAL; 111 112 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback)); 113 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture)); 114 cdev->input_panic = 0; 115 cdev->output_panic = 0; 116 cdev->first_packet = 4; 117 cdev->streaming = 1; 118 cdev->warned = 0; 119 120 for (i = 0; i < N_URBS; i++) { 121 ret = usb_submit_urb(cdev->data_urbs_in[i], GFP_ATOMIC); 122 if (ret) { 123 dev_err(dev, "unable to trigger read #%d! (ret %d)\n", 124 i, ret); 125 cdev->streaming = 0; 126 return -EPIPE; 127 } 128 } 129 130 return 0; 131 } 132 133 static void stream_stop(struct snd_usb_caiaqdev *cdev) 134 { 135 int i; 136 struct device *dev = caiaqdev_to_dev(cdev); 137 138 dev_dbg(dev, "%s(%p)\n", __func__, cdev); 139 if (!cdev->streaming) 140 return; 141 142 cdev->streaming = 0; 143 144 for (i = 0; i < N_URBS; i++) { 145 usb_kill_urb(cdev->data_urbs_in[i]); 146 147 if (test_bit(i, &cdev->outurb_active_mask)) 148 usb_kill_urb(cdev->data_urbs_out[i]); 149 } 150 151 cdev->outurb_active_mask = 0; 152 } 153 154 static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream) 155 { 156 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream); 157 struct device *dev = caiaqdev_to_dev(cdev); 158 159 dev_dbg(dev, "%s(%p)\n", __func__, substream); 160 substream->runtime->hw = cdev->pcm_info; 161 snd_pcm_limit_hw_rates(substream->runtime); 162 163 return 0; 164 } 165 166 static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream) 167 { 168 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream); 169 struct device *dev = caiaqdev_to_dev(cdev); 170 171 dev_dbg(dev, "%s(%p)\n", __func__, substream); 172 if (all_substreams_zero(cdev->sub_playback) && 173 all_substreams_zero(cdev->sub_capture)) { 174 /* when the last client has stopped streaming, 175 * all sample rates are allowed again */ 176 stream_stop(cdev); 177 cdev->pcm_info.rates = cdev->samplerates; 178 } 179 180 return 0; 181 } 182 183 static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub, 184 struct snd_pcm_hw_params *hw_params) 185 { 186 return snd_pcm_lib_alloc_vmalloc_buffer(sub, 187 params_buffer_bytes(hw_params)); 188 } 189 190 static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub) 191 { 192 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub); 193 deactivate_substream(cdev, sub); 194 return snd_pcm_lib_free_vmalloc_buffer(sub); 195 } 196 197 /* this should probably go upstream */ 198 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 199 #error "Change this table" 200 #endif 201 202 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, 203 48000, 64000, 88200, 96000, 176400, 192000 }; 204 205 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream) 206 { 207 int bytes_per_sample, bpp, ret, i; 208 int index = substream->number; 209 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream); 210 struct snd_pcm_runtime *runtime = substream->runtime; 211 struct device *dev = caiaqdev_to_dev(cdev); 212 213 dev_dbg(dev, "%s(%p)\n", __func__, substream); 214 215 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 216 int out_pos; 217 218 switch (cdev->spec.data_alignment) { 219 case 0: 220 case 2: 221 out_pos = BYTES_PER_SAMPLE + 1; 222 break; 223 case 3: 224 default: 225 out_pos = 0; 226 break; 227 } 228 229 cdev->period_out_count[index] = out_pos; 230 cdev->audio_out_buf_pos[index] = out_pos; 231 } else { 232 int in_pos; 233 234 switch (cdev->spec.data_alignment) { 235 case 0: 236 in_pos = BYTES_PER_SAMPLE + 2; 237 break; 238 case 2: 239 in_pos = BYTES_PER_SAMPLE; 240 break; 241 case 3: 242 default: 243 in_pos = 0; 244 break; 245 } 246 247 cdev->period_in_count[index] = in_pos; 248 cdev->audio_in_buf_pos[index] = in_pos; 249 } 250 251 if (cdev->streaming) 252 return 0; 253 254 /* the first client that opens a stream defines the sample rate 255 * setting for all subsequent calls, until the last client closed. */ 256 for (i=0; i < ARRAY_SIZE(rates); i++) 257 if (runtime->rate == rates[i]) 258 cdev->pcm_info.rates = 1 << i; 259 260 snd_pcm_limit_hw_rates(runtime); 261 262 bytes_per_sample = BYTES_PER_SAMPLE; 263 if (cdev->spec.data_alignment >= 2) 264 bytes_per_sample++; 265 266 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE) 267 * bytes_per_sample * CHANNELS_PER_STREAM * cdev->n_streams; 268 269 if (bpp > MAX_ENDPOINT_SIZE) 270 bpp = MAX_ENDPOINT_SIZE; 271 272 ret = snd_usb_caiaq_set_audio_params(cdev, runtime->rate, 273 runtime->sample_bits, bpp); 274 if (ret) 275 return ret; 276 277 ret = stream_start(cdev); 278 if (ret) 279 return ret; 280 281 cdev->output_running = 0; 282 wait_event_timeout(cdev->prepare_wait_queue, cdev->output_running, HZ); 283 if (!cdev->output_running) { 284 stream_stop(cdev); 285 return -EPIPE; 286 } 287 288 return 0; 289 } 290 291 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd) 292 { 293 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub); 294 struct device *dev = caiaqdev_to_dev(cdev); 295 296 dev_dbg(dev, "%s(%p) cmd %d\n", __func__, sub, cmd); 297 298 switch (cmd) { 299 case SNDRV_PCM_TRIGGER_START: 300 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 301 activate_substream(cdev, sub); 302 break; 303 case SNDRV_PCM_TRIGGER_STOP: 304 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 305 deactivate_substream(cdev, sub); 306 break; 307 default: 308 return -EINVAL; 309 } 310 311 return 0; 312 } 313 314 static snd_pcm_uframes_t 315 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub) 316 { 317 int index = sub->number; 318 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub); 319 snd_pcm_uframes_t ptr; 320 321 spin_lock(&cdev->spinlock); 322 323 if (cdev->input_panic || cdev->output_panic) { 324 ptr = SNDRV_PCM_POS_XRUN; 325 goto unlock; 326 } 327 328 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) 329 ptr = bytes_to_frames(sub->runtime, 330 cdev->audio_out_buf_pos[index]); 331 else 332 ptr = bytes_to_frames(sub->runtime, 333 cdev->audio_in_buf_pos[index]); 334 335 unlock: 336 spin_unlock(&cdev->spinlock); 337 return ptr; 338 } 339 340 /* operators for both playback and capture */ 341 static const struct snd_pcm_ops snd_usb_caiaq_ops = { 342 .open = snd_usb_caiaq_substream_open, 343 .close = snd_usb_caiaq_substream_close, 344 .ioctl = snd_pcm_lib_ioctl, 345 .hw_params = snd_usb_caiaq_pcm_hw_params, 346 .hw_free = snd_usb_caiaq_pcm_hw_free, 347 .prepare = snd_usb_caiaq_pcm_prepare, 348 .trigger = snd_usb_caiaq_pcm_trigger, 349 .pointer = snd_usb_caiaq_pcm_pointer, 350 .page = snd_pcm_lib_get_vmalloc_page, 351 .mmap = snd_pcm_lib_mmap_vmalloc, 352 }; 353 354 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *cdev, 355 struct snd_pcm_substream **subs) 356 { 357 int stream, pb, *cnt; 358 struct snd_pcm_substream *sub; 359 360 for (stream = 0; stream < cdev->n_streams; stream++) { 361 sub = subs[stream]; 362 if (!sub) 363 continue; 364 365 pb = snd_pcm_lib_period_bytes(sub); 366 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 367 &cdev->period_out_count[stream] : 368 &cdev->period_in_count[stream]; 369 370 if (*cnt >= pb) { 371 snd_pcm_period_elapsed(sub); 372 *cnt %= pb; 373 } 374 } 375 } 376 377 static void read_in_urb_mode0(struct snd_usb_caiaqdev *cdev, 378 const struct urb *urb, 379 const struct usb_iso_packet_descriptor *iso) 380 { 381 unsigned char *usb_buf = urb->transfer_buffer + iso->offset; 382 struct snd_pcm_substream *sub; 383 int stream, i; 384 385 if (all_substreams_zero(cdev->sub_capture)) 386 return; 387 388 for (i = 0; i < iso->actual_length;) { 389 for (stream = 0; stream < cdev->n_streams; stream++, i++) { 390 sub = cdev->sub_capture[stream]; 391 if (sub) { 392 struct snd_pcm_runtime *rt = sub->runtime; 393 char *audio_buf = rt->dma_area; 394 int sz = frames_to_bytes(rt, rt->buffer_size); 395 audio_buf[cdev->audio_in_buf_pos[stream]++] 396 = usb_buf[i]; 397 cdev->period_in_count[stream]++; 398 if (cdev->audio_in_buf_pos[stream] == sz) 399 cdev->audio_in_buf_pos[stream] = 0; 400 } 401 } 402 } 403 } 404 405 static void read_in_urb_mode2(struct snd_usb_caiaqdev *cdev, 406 const struct urb *urb, 407 const struct usb_iso_packet_descriptor *iso) 408 { 409 unsigned char *usb_buf = urb->transfer_buffer + iso->offset; 410 unsigned char check_byte; 411 struct snd_pcm_substream *sub; 412 int stream, i; 413 414 for (i = 0; i < iso->actual_length;) { 415 if (i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 0) { 416 for (stream = 0; 417 stream < cdev->n_streams; 418 stream++, i++) { 419 if (cdev->first_packet) 420 continue; 421 422 check_byte = MAKE_CHECKBYTE(cdev, stream, i); 423 424 if ((usb_buf[i] & 0x3f) != check_byte) 425 cdev->input_panic = 1; 426 427 if (usb_buf[i] & 0x80) 428 cdev->output_panic = 1; 429 } 430 } 431 cdev->first_packet = 0; 432 433 for (stream = 0; stream < cdev->n_streams; stream++, i++) { 434 sub = cdev->sub_capture[stream]; 435 if (cdev->input_panic) 436 usb_buf[i] = 0; 437 438 if (sub) { 439 struct snd_pcm_runtime *rt = sub->runtime; 440 char *audio_buf = rt->dma_area; 441 int sz = frames_to_bytes(rt, rt->buffer_size); 442 audio_buf[cdev->audio_in_buf_pos[stream]++] = 443 usb_buf[i]; 444 cdev->period_in_count[stream]++; 445 if (cdev->audio_in_buf_pos[stream] == sz) 446 cdev->audio_in_buf_pos[stream] = 0; 447 } 448 } 449 } 450 } 451 452 static void read_in_urb_mode3(struct snd_usb_caiaqdev *cdev, 453 const struct urb *urb, 454 const struct usb_iso_packet_descriptor *iso) 455 { 456 unsigned char *usb_buf = urb->transfer_buffer + iso->offset; 457 struct device *dev = caiaqdev_to_dev(cdev); 458 int stream, i; 459 460 /* paranoia check */ 461 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM)) 462 return; 463 464 for (i = 0; i < iso->actual_length;) { 465 for (stream = 0; stream < cdev->n_streams; stream++) { 466 struct snd_pcm_substream *sub = cdev->sub_capture[stream]; 467 char *audio_buf = NULL; 468 int c, n, sz = 0; 469 470 if (sub && !cdev->input_panic) { 471 struct snd_pcm_runtime *rt = sub->runtime; 472 audio_buf = rt->dma_area; 473 sz = frames_to_bytes(rt, rt->buffer_size); 474 } 475 476 for (c = 0; c < CHANNELS_PER_STREAM; c++) { 477 /* 3 audio data bytes, followed by 1 check byte */ 478 if (audio_buf) { 479 for (n = 0; n < BYTES_PER_SAMPLE; n++) { 480 audio_buf[cdev->audio_in_buf_pos[stream]++] = usb_buf[i+n]; 481 482 if (cdev->audio_in_buf_pos[stream] == sz) 483 cdev->audio_in_buf_pos[stream] = 0; 484 } 485 486 cdev->period_in_count[stream] += BYTES_PER_SAMPLE; 487 } 488 489 i += BYTES_PER_SAMPLE; 490 491 if (usb_buf[i] != ((stream << 1) | c) && 492 !cdev->first_packet) { 493 if (!cdev->input_panic) 494 dev_warn(dev, " EXPECTED: %02x got %02x, c %d, stream %d, i %d\n", 495 ((stream << 1) | c), usb_buf[i], c, stream, i); 496 cdev->input_panic = 1; 497 } 498 499 i++; 500 } 501 } 502 } 503 504 if (cdev->first_packet > 0) 505 cdev->first_packet--; 506 } 507 508 static void read_in_urb(struct snd_usb_caiaqdev *cdev, 509 const struct urb *urb, 510 const struct usb_iso_packet_descriptor *iso) 511 { 512 struct device *dev = caiaqdev_to_dev(cdev); 513 514 if (!cdev->streaming) 515 return; 516 517 if (iso->actual_length < cdev->bpp) 518 return; 519 520 switch (cdev->spec.data_alignment) { 521 case 0: 522 read_in_urb_mode0(cdev, urb, iso); 523 break; 524 case 2: 525 read_in_urb_mode2(cdev, urb, iso); 526 break; 527 case 3: 528 read_in_urb_mode3(cdev, urb, iso); 529 break; 530 } 531 532 if ((cdev->input_panic || cdev->output_panic) && !cdev->warned) { 533 dev_warn(dev, "streaming error detected %s %s\n", 534 cdev->input_panic ? "(input)" : "", 535 cdev->output_panic ? "(output)" : ""); 536 cdev->warned = 1; 537 } 538 } 539 540 static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *cdev, 541 struct urb *urb, 542 const struct usb_iso_packet_descriptor *iso) 543 { 544 unsigned char *usb_buf = urb->transfer_buffer + iso->offset; 545 struct snd_pcm_substream *sub; 546 int stream, i; 547 548 for (i = 0; i < iso->length;) { 549 for (stream = 0; stream < cdev->n_streams; stream++, i++) { 550 sub = cdev->sub_playback[stream]; 551 if (sub) { 552 struct snd_pcm_runtime *rt = sub->runtime; 553 char *audio_buf = rt->dma_area; 554 int sz = frames_to_bytes(rt, rt->buffer_size); 555 usb_buf[i] = 556 audio_buf[cdev->audio_out_buf_pos[stream]]; 557 cdev->period_out_count[stream]++; 558 cdev->audio_out_buf_pos[stream]++; 559 if (cdev->audio_out_buf_pos[stream] == sz) 560 cdev->audio_out_buf_pos[stream] = 0; 561 } else 562 usb_buf[i] = 0; 563 } 564 565 /* fill in the check bytes */ 566 if (cdev->spec.data_alignment == 2 && 567 i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 568 (cdev->n_streams * CHANNELS_PER_STREAM)) 569 for (stream = 0; stream < cdev->n_streams; stream++, i++) 570 usb_buf[i] = MAKE_CHECKBYTE(cdev, stream, i); 571 } 572 } 573 574 static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *cdev, 575 struct urb *urb, 576 const struct usb_iso_packet_descriptor *iso) 577 { 578 unsigned char *usb_buf = urb->transfer_buffer + iso->offset; 579 int stream, i; 580 581 for (i = 0; i < iso->length;) { 582 for (stream = 0; stream < cdev->n_streams; stream++) { 583 struct snd_pcm_substream *sub = cdev->sub_playback[stream]; 584 char *audio_buf = NULL; 585 int c, n, sz = 0; 586 587 if (sub) { 588 struct snd_pcm_runtime *rt = sub->runtime; 589 audio_buf = rt->dma_area; 590 sz = frames_to_bytes(rt, rt->buffer_size); 591 } 592 593 for (c = 0; c < CHANNELS_PER_STREAM; c++) { 594 for (n = 0; n < BYTES_PER_SAMPLE; n++) { 595 if (audio_buf) { 596 usb_buf[i+n] = audio_buf[cdev->audio_out_buf_pos[stream]++]; 597 598 if (cdev->audio_out_buf_pos[stream] == sz) 599 cdev->audio_out_buf_pos[stream] = 0; 600 } else { 601 usb_buf[i+n] = 0; 602 } 603 } 604 605 if (audio_buf) 606 cdev->period_out_count[stream] += BYTES_PER_SAMPLE; 607 608 i += BYTES_PER_SAMPLE; 609 610 /* fill in the check byte pattern */ 611 usb_buf[i++] = (stream << 1) | c; 612 } 613 } 614 } 615 } 616 617 static inline void fill_out_urb(struct snd_usb_caiaqdev *cdev, 618 struct urb *urb, 619 const struct usb_iso_packet_descriptor *iso) 620 { 621 switch (cdev->spec.data_alignment) { 622 case 0: 623 case 2: 624 fill_out_urb_mode_0(cdev, urb, iso); 625 break; 626 case 3: 627 fill_out_urb_mode_3(cdev, urb, iso); 628 break; 629 } 630 } 631 632 static void read_completed(struct urb *urb) 633 { 634 struct snd_usb_caiaq_cb_info *info = urb->context; 635 struct snd_usb_caiaqdev *cdev; 636 struct device *dev; 637 struct urb *out = NULL; 638 int i, frame, len, send_it = 0, outframe = 0; 639 size_t offset = 0; 640 641 if (urb->status || !info) 642 return; 643 644 cdev = info->cdev; 645 dev = caiaqdev_to_dev(cdev); 646 647 if (!cdev->streaming) 648 return; 649 650 /* find an unused output urb that is unused */ 651 for (i = 0; i < N_URBS; i++) 652 if (test_and_set_bit(i, &cdev->outurb_active_mask) == 0) { 653 out = cdev->data_urbs_out[i]; 654 break; 655 } 656 657 if (!out) { 658 dev_err(dev, "Unable to find an output urb to use\n"); 659 goto requeue; 660 } 661 662 /* read the recently received packet and send back one which has 663 * the same layout */ 664 for (frame = 0; frame < FRAMES_PER_URB; frame++) { 665 if (urb->iso_frame_desc[frame].status) 666 continue; 667 668 len = urb->iso_frame_desc[outframe].actual_length; 669 out->iso_frame_desc[outframe].length = len; 670 out->iso_frame_desc[outframe].actual_length = 0; 671 out->iso_frame_desc[outframe].offset = offset; 672 offset += len; 673 674 if (len > 0) { 675 spin_lock(&cdev->spinlock); 676 fill_out_urb(cdev, out, &out->iso_frame_desc[outframe]); 677 read_in_urb(cdev, urb, &urb->iso_frame_desc[frame]); 678 spin_unlock(&cdev->spinlock); 679 check_for_elapsed_periods(cdev, cdev->sub_playback); 680 check_for_elapsed_periods(cdev, cdev->sub_capture); 681 send_it = 1; 682 } 683 684 outframe++; 685 } 686 687 if (send_it) { 688 out->number_of_packets = outframe; 689 usb_submit_urb(out, GFP_ATOMIC); 690 } else { 691 struct snd_usb_caiaq_cb_info *oinfo = out->context; 692 clear_bit(oinfo->index, &cdev->outurb_active_mask); 693 } 694 695 requeue: 696 /* re-submit inbound urb */ 697 for (frame = 0; frame < FRAMES_PER_URB; frame++) { 698 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame; 699 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME; 700 urb->iso_frame_desc[frame].actual_length = 0; 701 } 702 703 urb->number_of_packets = FRAMES_PER_URB; 704 usb_submit_urb(urb, GFP_ATOMIC); 705 } 706 707 static void write_completed(struct urb *urb) 708 { 709 struct snd_usb_caiaq_cb_info *info = urb->context; 710 struct snd_usb_caiaqdev *cdev = info->cdev; 711 712 if (!cdev->output_running) { 713 cdev->output_running = 1; 714 wake_up(&cdev->prepare_wait_queue); 715 } 716 717 clear_bit(info->index, &cdev->outurb_active_mask); 718 } 719 720 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret) 721 { 722 int i, frame; 723 struct urb **urbs; 724 struct usb_device *usb_dev = cdev->chip.dev; 725 unsigned int pipe; 726 727 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ? 728 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) : 729 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE); 730 731 urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL); 732 if (!urbs) { 733 *ret = -ENOMEM; 734 return NULL; 735 } 736 737 for (i = 0; i < N_URBS; i++) { 738 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL); 739 if (!urbs[i]) { 740 *ret = -ENOMEM; 741 return urbs; 742 } 743 744 urbs[i]->transfer_buffer = 745 kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL); 746 if (!urbs[i]->transfer_buffer) { 747 *ret = -ENOMEM; 748 return urbs; 749 } 750 751 for (frame = 0; frame < FRAMES_PER_URB; frame++) { 752 struct usb_iso_packet_descriptor *iso = 753 &urbs[i]->iso_frame_desc[frame]; 754 755 iso->offset = BYTES_PER_FRAME * frame; 756 iso->length = BYTES_PER_FRAME; 757 } 758 759 urbs[i]->dev = usb_dev; 760 urbs[i]->pipe = pipe; 761 urbs[i]->transfer_buffer_length = FRAMES_PER_URB 762 * BYTES_PER_FRAME; 763 urbs[i]->context = &cdev->data_cb_info[i]; 764 urbs[i]->interval = 1; 765 urbs[i]->number_of_packets = FRAMES_PER_URB; 766 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ? 767 read_completed : write_completed; 768 } 769 770 *ret = 0; 771 return urbs; 772 } 773 774 static void free_urbs(struct urb **urbs) 775 { 776 int i; 777 778 if (!urbs) 779 return; 780 781 for (i = 0; i < N_URBS; i++) { 782 if (!urbs[i]) 783 continue; 784 785 usb_kill_urb(urbs[i]); 786 kfree(urbs[i]->transfer_buffer); 787 usb_free_urb(urbs[i]); 788 } 789 790 kfree(urbs); 791 } 792 793 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev) 794 { 795 int i, ret; 796 struct device *dev = caiaqdev_to_dev(cdev); 797 798 cdev->n_audio_in = max(cdev->spec.num_analog_audio_in, 799 cdev->spec.num_digital_audio_in) / 800 CHANNELS_PER_STREAM; 801 cdev->n_audio_out = max(cdev->spec.num_analog_audio_out, 802 cdev->spec.num_digital_audio_out) / 803 CHANNELS_PER_STREAM; 804 cdev->n_streams = max(cdev->n_audio_in, cdev->n_audio_out); 805 806 dev_dbg(dev, "cdev->n_audio_in = %d\n", cdev->n_audio_in); 807 dev_dbg(dev, "cdev->n_audio_out = %d\n", cdev->n_audio_out); 808 dev_dbg(dev, "cdev->n_streams = %d\n", cdev->n_streams); 809 810 if (cdev->n_streams > MAX_STREAMS) { 811 dev_err(dev, "unable to initialize device, too many streams.\n"); 812 return -EINVAL; 813 } 814 815 if (cdev->n_streams < 1) { 816 dev_err(dev, "bogus number of streams: %d\n", cdev->n_streams); 817 return -EINVAL; 818 } 819 820 ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0, 821 cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm); 822 823 if (ret < 0) { 824 dev_err(dev, "snd_pcm_new() returned %d\n", ret); 825 return ret; 826 } 827 828 cdev->pcm->private_data = cdev; 829 strlcpy(cdev->pcm->name, cdev->product_name, sizeof(cdev->pcm->name)); 830 831 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback)); 832 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture)); 833 834 memcpy(&cdev->pcm_info, &snd_usb_caiaq_pcm_hardware, 835 sizeof(snd_usb_caiaq_pcm_hardware)); 836 837 /* setup samplerates */ 838 cdev->samplerates = cdev->pcm_info.rates; 839 switch (cdev->chip.usb_id) { 840 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1): 841 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3): 842 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO): 843 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE): 844 cdev->samplerates |= SNDRV_PCM_RATE_192000; 845 /* fall thru */ 846 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ): 847 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ): 848 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ): 849 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2): 850 cdev->samplerates |= SNDRV_PCM_RATE_88200; 851 break; 852 } 853 854 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 855 &snd_usb_caiaq_ops); 856 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE, 857 &snd_usb_caiaq_ops); 858 859 cdev->data_cb_info = 860 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS, 861 GFP_KERNEL); 862 863 if (!cdev->data_cb_info) 864 return -ENOMEM; 865 866 cdev->outurb_active_mask = 0; 867 BUILD_BUG_ON(N_URBS > (sizeof(cdev->outurb_active_mask) * 8)); 868 869 for (i = 0; i < N_URBS; i++) { 870 cdev->data_cb_info[i].cdev = cdev; 871 cdev->data_cb_info[i].index = i; 872 } 873 874 cdev->data_urbs_in = alloc_urbs(cdev, SNDRV_PCM_STREAM_CAPTURE, &ret); 875 if (ret < 0) { 876 kfree(cdev->data_cb_info); 877 free_urbs(cdev->data_urbs_in); 878 return ret; 879 } 880 881 cdev->data_urbs_out = alloc_urbs(cdev, SNDRV_PCM_STREAM_PLAYBACK, &ret); 882 if (ret < 0) { 883 kfree(cdev->data_cb_info); 884 free_urbs(cdev->data_urbs_in); 885 free_urbs(cdev->data_urbs_out); 886 return ret; 887 } 888 889 return 0; 890 } 891 892 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *cdev) 893 { 894 struct device *dev = caiaqdev_to_dev(cdev); 895 896 dev_dbg(dev, "%s(%p)\n", __func__, cdev); 897 stream_stop(cdev); 898 free_urbs(cdev->data_urbs_in); 899 free_urbs(cdev->data_urbs_out); 900 kfree(cdev->data_cb_info); 901 } 902 903