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