git.oblomov.eu Git - linux-2.6/blob - sound/usb/caiaq/caiaq-audio.c

   1 /*
   2  *   Copyright (c) 2006,2007 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/init.h>
  20 #include <linux/module.h>
  21 #include <linux/moduleparam.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/usb.h>
  24 #include <linux/spinlock.h>
  25 #include <sound/core.h>
  26 #include <sound/initval.h>
  27 #include <sound/pcm.h>
  28 #include <sound/rawmidi.h>
  29 #include <linux/input.h>
  30
  31 #include "caiaq-device.h"
  32 #include "caiaq-audio.h"
  33
  34 #define N_URBS                  32
  35 #define CLOCK_DRIFT_TOLERANCE   5
  36 #define FRAMES_PER_URB          8
  37 #define BYTES_PER_FRAME         512
  38 #define CHANNELS_PER_STREAM     2
  39 #define BYTES_PER_SAMPLE        3
  40 #define BYTES_PER_SAMPLE_USB    4
  41 #define MAX_BUFFER_SIZE         (128*1024)
  42
  43 #define ENDPOINT_CAPTURE        2
  44 #define ENDPOINT_PLAYBACK       6
  45
  46 #define MAKE_CHECKBYTE(dev,stream,i) \
  47         (stream << 1) | (~(i / (dev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
  48
  49 static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
  50         .info           = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
  51                            SNDRV_PCM_INFO_BLOCK_TRANSFER),
  52         .formats        = SNDRV_PCM_FMTBIT_S24_3BE,
  53         .rates          = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
  54                            SNDRV_PCM_RATE_96000),
  55         .rate_min       = 44100,
  56         .rate_max       = 0, /* will overwrite later */
  57         .channels_min   = CHANNELS_PER_STREAM,
  58         .channels_max   = CHANNELS_PER_STREAM,
  59         .buffer_bytes_max = MAX_BUFFER_SIZE,
  60         .period_bytes_min = 128,
  61         .period_bytes_max = MAX_BUFFER_SIZE,
  62         .periods_min    = 1,
  63         .periods_max    = 1024,
  64 };
  65
  66 static void
  67 activate_substream(struct snd_usb_caiaqdev *dev,
  68                    struct snd_pcm_substream *sub)
  69 {
  70         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
  71                 dev->sub_playback[sub->number] = sub;
  72         else
  73                 dev->sub_capture[sub->number] = sub;
  74 }
  75
  76 static void
  77 deactivate_substream(struct snd_usb_caiaqdev *dev,
  78                      struct snd_pcm_substream *sub)
  79 {
  80         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
  81                 dev->sub_playback[sub->number] = NULL;
  82         else
  83                 dev->sub_capture[sub->number] = NULL;
  84 }
  85
  86 static int
  87 all_substreams_zero(struct snd_pcm_substream **subs)
  88 {
  89         int i;
  90         for (i = 0; i < MAX_STREAMS; i++)
  91                 if (subs[i] != NULL)
  92                         return 0;
  93         return 1;
  94 }
  95
  96 static int stream_start(struct snd_usb_caiaqdev *dev)
  97 {
  98         int i, ret;
  99
 100         debug("stream_start(%p)\n", dev);
 101         spin_lock_irq(&dev->spinlock);
 102         if (dev->streaming) {
 103                 spin_unlock_irq(&dev->spinlock);
 104                 return -EINVAL;
 105         }
 106
 107         dev->input_panic = 0;
 108         dev->output_panic = 0;
 109         dev->first_packet = 1;
 110         dev->streaming = 1;
 111
 112         for (i = 0; i < N_URBS; i++) {
 113                 ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC);
 114                 if (ret) {
 115                         log("unable to trigger initial read #%d! (ret = %d)\n",
 116                                 i, ret);
 117                         dev->streaming = 0;
 118                         spin_unlock_irq(&dev->spinlock);
 119                         return -EPIPE;
 120                 }
 121         }
 122
 123         spin_unlock_irq(&dev->spinlock);
 124         return 0;
 125 }
 126
 127 static void stream_stop(struct snd_usb_caiaqdev *dev)
 128 {
 129         int i;
 130
 131         debug("stream_stop(%p)\n", dev);
 132         if (!dev->streaming)
 133                 return;
 134
 135         dev->streaming = 0;
 136         for (i = 0; i < N_URBS; i++) {
 137                 usb_unlink_urb(dev->data_urbs_in[i]);
 138                 usb_unlink_urb(dev->data_urbs_out[i]);
 139         }
 140 }
 141
 142 static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
 143 {
 144         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
 145         debug("snd_usb_caiaq_substream_open(%p)\n", substream);
 146         substream->runtime->hw = dev->pcm_info;
 147         snd_pcm_limit_hw_rates(substream->runtime);
 148         return 0;
 149 }
 150
 151 static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
 152 {
 153         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
 154
 155         debug("snd_usb_caiaq_substream_close(%p)\n", substream);
 156         if (all_substreams_zero(dev->sub_playback) &&
 157             all_substreams_zero(dev->sub_capture)) {
 158                 /* when the last client has stopped streaming,
 159                  * all sample rates are allowed again */
 160                 stream_stop(dev);
 161                 dev->pcm_info.rates = dev->samplerates;
 162         }
 163
 164         return 0;
 165 }
 166
 167 static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
 168                                         struct snd_pcm_hw_params *hw_params)
 169 {
 170         debug("snd_usb_caiaq_pcm_hw_params(%p)\n", sub);
 171         return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params));
 172 }
 173
 174 static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
 175 {
 176         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
 177         debug("snd_usb_caiaq_pcm_hw_free(%p)\n", sub);
 178         spin_lock_irq(&dev->spinlock);
 179         deactivate_substream(dev, sub);
 180         spin_unlock_irq(&dev->spinlock);
 181         return snd_pcm_lib_free_pages(sub);
 182 }
 183
 184 /* this should probably go upstream */
 185 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
 186 #error "Change this table"
 187 #endif
 188
 189 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
 190                                  48000, 64000, 88200, 96000, 176400, 192000 };
 191
 192 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
 193 {
 194         int bytes_per_sample, bpp, ret, i;
 195         int index = substream->number;
 196         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
 197         struct snd_pcm_runtime *runtime = substream->runtime;
 198
 199         debug("snd_usb_caiaq_pcm_prepare(%p)\n", substream);
 200
 201         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 202                 dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
 203         else
 204                 dev->audio_in_buf_pos[index] = 0;
 205
 206         if (dev->streaming)
 207                 return 0;
 208
 209         /* the first client that opens a stream defines the sample rate
 210          * setting for all subsequent calls, until the last client closed. */
 211         for (i=0; i < ARRAY_SIZE(rates); i++)
 212                 if (runtime->rate == rates[i])
 213                         dev->pcm_info.rates = 1 << i;
 214
 215         snd_pcm_limit_hw_rates(runtime);
 216
 217         bytes_per_sample = BYTES_PER_SAMPLE;
 218         if (dev->spec.data_alignment == 2)
 219                 bytes_per_sample++;
 220
 221         bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
 222                 * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
 223
 224         ret = snd_usb_caiaq_set_audio_params(dev, runtime->rate,
 225                                              runtime->sample_bits, bpp);
 226         if (ret)
 227                 return ret;
 228
 229         ret = stream_start(dev);
 230         if (ret)
 231                 return ret;
 232
 233         dev->output_running = 0;
 234         wait_event_timeout(dev->prepare_wait_queue, dev->output_running, HZ);
 235         if (!dev->output_running) {
 236                 stream_stop(dev);
 237                 return -EPIPE;
 238         }
 239
 240         return 0;
 241 }
 242
 243 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
 244 {
 245         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
 246
 247         switch (cmd) {
 248         case SNDRV_PCM_TRIGGER_START:
 249         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 250                 spin_lock(&dev->spinlock);
 251                 activate_substream(dev, sub);
 252                 spin_unlock(&dev->spinlock);
 253                 break;
 254         case SNDRV_PCM_TRIGGER_STOP:
 255         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 256                 spin_lock(&dev->spinlock);
 257                 deactivate_substream(dev, sub);
 258                 spin_unlock(&dev->spinlock);
 259                 break;
 260         default:
 261                 return -EINVAL;
 262         }
 263
 264         return 0;
 265 }
 266
 267 static snd_pcm_uframes_t
 268 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
 269 {
 270         int index = sub->number;
 271         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
 272
 273         if (dev->input_panic || dev->output_panic)
 274                 return SNDRV_PCM_POS_XRUN;
 275
 276         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
 277                 return bytes_to_frames(sub->runtime,
 278                                         dev->audio_out_buf_pos[index]);
 279         else
 280                 return bytes_to_frames(sub->runtime,
 281                                         dev->audio_in_buf_pos[index]);
 282 }
 283
 284 /* operators for both playback and capture */
 285 static struct snd_pcm_ops snd_usb_caiaq_ops = {
 286         .open =         snd_usb_caiaq_substream_open,
 287         .close =        snd_usb_caiaq_substream_close,
 288         .ioctl =        snd_pcm_lib_ioctl,
 289         .hw_params =    snd_usb_caiaq_pcm_hw_params,
 290         .hw_free =      snd_usb_caiaq_pcm_hw_free,
 291         .prepare =      snd_usb_caiaq_pcm_prepare,
 292         .trigger =      snd_usb_caiaq_pcm_trigger,
 293         .pointer =      snd_usb_caiaq_pcm_pointer
 294 };
 295
 296 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
 297                                       struct snd_pcm_substream **subs)
 298 {
 299         int stream, pb, *cnt;
 300         struct snd_pcm_substream *sub;
 301
 302         for (stream = 0; stream < dev->n_streams; stream++) {
 303                 sub = subs[stream];
 304                 if (!sub)
 305                         continue;
 306
 307                 pb = frames_to_bytes(sub->runtime,
 308                                      sub->runtime->period_size);
 309                 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 310                                         &dev->period_out_count[stream] :
 311                                         &dev->period_in_count[stream];
 312
 313                 if (*cnt >= pb) {
 314                         snd_pcm_period_elapsed(sub);
 315                         *cnt %= pb;
 316                 }
 317         }
 318 }
 319
 320 static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
 321                               const struct urb *urb,
 322                               const struct usb_iso_packet_descriptor *iso)
 323 {
 324         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
 325         struct snd_pcm_substream *sub;
 326         int stream, i;
 327
 328         if (all_substreams_zero(dev->sub_capture))
 329                 return;
 330
 331         spin_lock(&dev->spinlock);
 332
 333         for (i = 0; i < iso->actual_length;) {
 334                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
 335                         sub = dev->sub_capture[stream];
 336                         if (sub) {
 337                                 struct snd_pcm_runtime *rt = sub->runtime;
 338                                 char *audio_buf = rt->dma_area;
 339                                 int sz = frames_to_bytes(rt, rt->buffer_size);
 340                                 audio_buf[dev->audio_in_buf_pos[stream]++]
 341                                         = usb_buf[i];
 342                                 dev->period_in_count[stream]++;
 343                                 if (dev->audio_in_buf_pos[stream] == sz)
 344                                         dev->audio_in_buf_pos[stream] = 0;
 345                         }
 346                 }
 347         }
 348
 349         spin_unlock(&dev->spinlock);
 350 }
 351
 352 static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
 353                               const struct urb *urb,
 354                               const struct usb_iso_packet_descriptor *iso)
 355 {
 356         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
 357         unsigned char check_byte;
 358         struct snd_pcm_substream *sub;
 359         int stream, i;
 360
 361         spin_lock(&dev->spinlock);
 362
 363         for (i = 0; i < iso->actual_length;) {
 364                 if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
 365                         for (stream = 0;
 366                              stream < dev->n_streams;
 367                              stream++, i++) {
 368                                 if (dev->first_packet)
 369                                         continue;
 370
 371                                 check_byte = MAKE_CHECKBYTE(dev, stream, i);
 372
 373                                 if ((usb_buf[i] & 0x3f) != check_byte)
 374                                         dev->input_panic = 1;
 375
 376                                 if (usb_buf[i] & 0x80)
 377                                         dev->output_panic = 1;
 378                         }
 379                 }
 380                 dev->first_packet = 0;
 381
 382                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
 383                         sub = dev->sub_capture[stream];
 384                         if (sub) {
 385                                 struct snd_pcm_runtime *rt = sub->runtime;
 386                                 char *audio_buf = rt->dma_area;
 387                                 int sz = frames_to_bytes(rt, rt->buffer_size);
 388                                 audio_buf[dev->audio_in_buf_pos[stream]++] =
 389                                         usb_buf[i];
 390                                 dev->period_in_count[stream]++;
 391                                 if (dev->audio_in_buf_pos[stream] == sz)
 392                                         dev->audio_in_buf_pos[stream] = 0;
 393                         }
 394                 }
 395         }
 396
 397         spin_unlock(&dev->spinlock);
 398 }
 399
 400 static void read_in_urb(struct snd_usb_caiaqdev *dev,
 401                         const struct urb *urb,
 402                         const struct usb_iso_packet_descriptor *iso)
 403 {
 404         if (!dev->streaming)
 405                 return;
 406
 407         switch (dev->spec.data_alignment) {
 408         case 0:
 409                 read_in_urb_mode0(dev, urb, iso);
 410                 break;
 411         case 2:
 412                 read_in_urb_mode2(dev, urb, iso);
 413                 break;
 414         }
 415
 416         if (dev->input_panic || dev->output_panic) {
 417                 debug("streaming error detected %s %s\n",
 418                                 dev->input_panic ? "(input)" : "",
 419                                 dev->output_panic ? "(output)" : "");
 420         }
 421
 422         check_for_elapsed_periods(dev, dev->sub_capture);
 423 }
 424
 425 static void fill_out_urb(struct snd_usb_caiaqdev *dev,
 426                          struct urb *urb,
 427                          const struct usb_iso_packet_descriptor *iso)
 428 {
 429         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
 430         struct snd_pcm_substream *sub;
 431         int stream, i;
 432
 433         spin_lock(&dev->spinlock);
 434
 435         for (i = 0; i < iso->length;) {
 436                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
 437                         sub = dev->sub_playback[stream];
 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                                 usb_buf[i] =
 443                                         audio_buf[dev->audio_out_buf_pos[stream]];
 444                                 dev->period_out_count[stream]++;
 445                                 dev->audio_out_buf_pos[stream]++;
 446                                 if (dev->audio_out_buf_pos[stream] == sz)
 447                                         dev->audio_out_buf_pos[stream] = 0;
 448                         } else
 449                                 usb_buf[i] = 0;
 450                 }
 451
 452                 /* fill in the check bytes */
 453                 if (dev->spec.data_alignment == 2 &&
 454                     i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
 455                         (dev->n_streams * CHANNELS_PER_STREAM))
 456                     for (stream = 0; stream < dev->n_streams; stream++, i++)
 457                         usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
 458         }
 459
 460         spin_unlock(&dev->spinlock);
 461         check_for_elapsed_periods(dev, dev->sub_playback);
 462 }
 463
 464 static void read_completed(struct urb *urb)
 465 {
 466         struct snd_usb_caiaq_cb_info *info = urb->context;
 467         struct snd_usb_caiaqdev *dev;
 468         struct urb *out;
 469         int frame, len, send_it = 0, outframe = 0;
 470
 471         if (urb->status || !info)
 472                 return;
 473
 474         dev = info->dev;
 475         if (!dev->streaming)
 476                 return;
 477
 478         out = dev->data_urbs_out[info->index];
 479
 480         /* read the recently received packet and send back one which has
 481          * the same layout */
 482         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
 483                 if (urb->iso_frame_desc[frame].status)
 484                         continue;
 485
 486                 len = urb->iso_frame_desc[outframe].actual_length;
 487                 out->iso_frame_desc[outframe].length = len;
 488                 out->iso_frame_desc[outframe].actual_length = 0;
 489                 out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame;
 490
 491                 if (len > 0) {
 492                         fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
 493                         read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
 494                         send_it = 1;
 495                 }
 496
 497                 outframe++;
 498         }
 499
 500         if (send_it) {
 501                 out->number_of_packets = FRAMES_PER_URB;
 502                 out->transfer_flags = URB_ISO_ASAP;
 503                 usb_submit_urb(out, GFP_ATOMIC);
 504         }
 505
 506         /* re-submit inbound urb */
 507         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
 508                 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
 509                 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
 510                 urb->iso_frame_desc[frame].actual_length = 0;
 511         }
 512
 513         urb->number_of_packets = FRAMES_PER_URB;
 514         urb->transfer_flags = URB_ISO_ASAP;
 515         usb_submit_urb(urb, GFP_ATOMIC);
 516 }
 517
 518 static void write_completed(struct urb *urb)
 519 {
 520         struct snd_usb_caiaq_cb_info *info = urb->context;
 521         struct snd_usb_caiaqdev *dev = info->dev;
 522
 523         if (!dev->output_running) {
 524                 dev->output_running = 1;
 525                 wake_up(&dev->prepare_wait_queue);
 526         }
 527 }
 528
 529 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
 530 {
 531         int i, frame;
 532         struct urb **urbs;
 533         struct usb_device *usb_dev = dev->chip.dev;
 534         unsigned int pipe;
 535
 536         pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
 537                 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
 538                 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
 539
 540         urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
 541         if (!urbs) {
 542                 log("unable to kmalloc() urbs, OOM!?\n");
 543                 *ret = -ENOMEM;
 544                 return NULL;
 545         }
 546
 547         for (i = 0; i < N_URBS; i++) {
 548                 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
 549                 if (!urbs[i]) {
 550                         log("unable to usb_alloc_urb(), OOM!?\n");
 551                         *ret = -ENOMEM;
 552                         return urbs;
 553                 }
 554
 555                 urbs[i]->transfer_buffer =
 556                         kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
 557                 if (!urbs[i]->transfer_buffer) {
 558                         log("unable to kmalloc() transfer buffer, OOM!?\n");
 559                         *ret = -ENOMEM;
 560                         return urbs;
 561                 }
 562
 563                 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
 564                         struct usb_iso_packet_descriptor *iso =
 565                                 &urbs[i]->iso_frame_desc[frame];
 566
 567                         iso->offset = BYTES_PER_FRAME * frame;
 568                         iso->length = BYTES_PER_FRAME;
 569                 }
 570
 571                 urbs[i]->dev = usb_dev;
 572                 urbs[i]->pipe = pipe;
 573                 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
 574                                                 * BYTES_PER_FRAME;
 575                 urbs[i]->context = &dev->data_cb_info[i];
 576                 urbs[i]->interval = 1;
 577                 urbs[i]->transfer_flags = URB_ISO_ASAP;
 578                 urbs[i]->number_of_packets = FRAMES_PER_URB;
 579                 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
 580                                         read_completed : write_completed;
 581         }
 582
 583         *ret = 0;
 584         return urbs;
 585 }
 586
 587 static void free_urbs(struct urb **urbs)
 588 {
 589         int i;
 590
 591         if (!urbs)
 592                 return;
 593
 594         for (i = 0; i < N_URBS; i++) {
 595                 if (!urbs[i])
 596                         continue;
 597
 598                 usb_kill_urb(urbs[i]);
 599                 kfree(urbs[i]->transfer_buffer);
 600                 usb_free_urb(urbs[i]);
 601         }
 602
 603         kfree(urbs);
 604 }
 605
 606 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
 607 {
 608         int i, ret;
 609
 610         dev->n_audio_in  = max(dev->spec.num_analog_audio_in,
 611                                dev->spec.num_digital_audio_in) /
 612                                 CHANNELS_PER_STREAM;
 613         dev->n_audio_out = max(dev->spec.num_analog_audio_out,
 614                                dev->spec.num_digital_audio_out) /
 615                                 CHANNELS_PER_STREAM;
 616         dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
 617
 618         debug("dev->n_audio_in = %d\n", dev->n_audio_in);
 619         debug("dev->n_audio_out = %d\n", dev->n_audio_out);
 620         debug("dev->n_streams = %d\n", dev->n_streams);
 621
 622         if (dev->n_streams > MAX_STREAMS) {
 623                 log("unable to initialize device, too many streams.\n");
 624                 return -EINVAL;
 625         }
 626
 627         ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
 628                         dev->n_audio_out, dev->n_audio_in, &dev->pcm);
 629
 630         if (ret < 0) {
 631                 log("snd_pcm_new() returned %d\n", ret);
 632                 return ret;
 633         }
 634
 635         dev->pcm->private_data = dev;
 636         strcpy(dev->pcm->name, dev->product_name);
 637
 638         memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
 639         memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
 640
 641         memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
 642                         sizeof(snd_usb_caiaq_pcm_hardware));
 643
 644         /* setup samplerates */
 645         dev->samplerates = dev->pcm_info.rates;
 646         switch (dev->chip.usb_id) {
 647         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
 648         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
 649                 dev->samplerates |= SNDRV_PCM_RATE_88200;
 650                 dev->samplerates |= SNDRV_PCM_RATE_192000;
 651                 break;
 652         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
 653                 dev->samplerates |= SNDRV_PCM_RATE_88200;
 654                 break;
 655         }
 656
 657         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
 658                                 &snd_usb_caiaq_ops);
 659         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
 660                                 &snd_usb_caiaq_ops);
 661
 662         snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
 663                                         SNDRV_DMA_TYPE_CONTINUOUS,
 664                                         snd_dma_continuous_data(GFP_KERNEL),
 665                                         MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
 666
 667         dev->data_cb_info =
 668                 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
 669                                         GFP_KERNEL);
 670
 671         if (!dev->data_cb_info)
 672                 return -ENOMEM;
 673
 674         for (i = 0; i < N_URBS; i++) {
 675                 dev->data_cb_info[i].dev = dev;
 676                 dev->data_cb_info[i].index = i;
 677         }
 678
 679         dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
 680         if (ret < 0) {
 681                 kfree(dev->data_cb_info);
 682                 free_urbs(dev->data_urbs_in);
 683                 return ret;
 684         }
 685
 686         dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
 687         if (ret < 0) {
 688                 kfree(dev->data_cb_info);
 689                 free_urbs(dev->data_urbs_in);
 690                 free_urbs(dev->data_urbs_out);
 691                 return ret;
 692         }
 693
 694         return 0;
 695 }
 696
 697 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
 698 {
 699         debug("snd_usb_caiaq_audio_free (%p)\n", dev);
 700         stream_stop(dev);
 701         free_urbs(dev->data_urbs_in);
 702         free_urbs(dev->data_urbs_out);
 703         kfree(dev->data_cb_info);
 704 }
 705