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 <sound/driver.h>
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/usb.h>
  25 #include <linux/spinlock.h>
  26 #include <sound/core.h>
  27 #include <sound/initval.h>
  28 #include <sound/pcm.h>
  29 #include <sound/rawmidi.h>
  30 #ifdef CONFIG_SND_USB_CAIAQ_INPUT
  31 #include <linux/input.h>
  32 #endif
  33
  34 #include "caiaq-device.h"
  35 #include "caiaq-audio.h"
  36
  37 #define N_URBS                  32
  38 #define CLOCK_DRIFT_TOLERANCE   5
  39 #define FRAMES_PER_URB          8
  40 #define BYTES_PER_FRAME         512
  41 #define CHANNELS_PER_STREAM     2
  42 #define BYTES_PER_SAMPLE        3
  43 #define BYTES_PER_SAMPLE_USB    4
  44 #define MAX_BUFFER_SIZE         (128*1024)
  45
  46 #define ENDPOINT_CAPTURE        2
  47 #define ENDPOINT_PLAYBACK       6
  48
  49 #define MAKE_CHECKBYTE(dev,stream,i) \
  50         (stream << 1) | (~(i / (dev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
  51
  52 static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
  53         .info           = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
  54                            SNDRV_PCM_INFO_BLOCK_TRANSFER),
  55         .formats        = SNDRV_PCM_FMTBIT_S24_3BE,
  56         .rates          = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
  57                            SNDRV_PCM_RATE_96000),
  58         .rate_min       = 44100,
  59         .rate_max       = 0, /* will overwrite later */
  60         .channels_min   = CHANNELS_PER_STREAM,
  61         .channels_max   = CHANNELS_PER_STREAM,
  62         .buffer_bytes_max = MAX_BUFFER_SIZE,
  63         .period_bytes_min = 4096,
  64         .period_bytes_max = MAX_BUFFER_SIZE,
  65         .periods_min    = 1,
  66         .periods_max    = 1024,
  67 };
  68
  69 static void
  70 activate_substream(struct snd_usb_caiaqdev *dev,
  71                    struct snd_pcm_substream *sub)
  72 {
  73         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
  74                 dev->sub_playback[sub->number] = sub;
  75         else
  76                 dev->sub_capture[sub->number] = sub;
  77 }
  78
  79 static void
  80 deactivate_substream(struct snd_usb_caiaqdev *dev,
  81                      struct snd_pcm_substream *sub)
  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
  89 static int
  90 all_substreams_zero(struct snd_pcm_substream **subs)
  91 {
  92         int i;
  93         for (i = 0; i < MAX_STREAMS; i++)
  94                 if (subs[i] != NULL)
  95                         return 0;
  96         return 1;
  97 }
  98
  99 static int stream_start(struct snd_usb_caiaqdev *dev)
 100 {
 101         int i, ret;
 102
 103         debug("stream_start(%p)\n", dev);
 104         spin_lock_irq(&dev->spinlock);
 105         if (dev->streaming) {
 106                 spin_unlock_irq(&dev->spinlock);
 107                 return -EINVAL;
 108         }
 109
 110         dev->input_panic = 0;
 111         dev->output_panic = 0;
 112         dev->first_packet = 1;
 113         dev->streaming = 1;
 114
 115         for (i = 0; i < N_URBS; i++) {
 116                 ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC);
 117                 if (ret) {
 118                         log("unable to trigger initial read #%d! (ret = %d)\n",
 119                                 i, ret);
 120                         dev->streaming = 0;
 121                         spin_unlock_irq(&dev->spinlock);
 122                         return -EPIPE;
 123                 }
 124         }
 125
 126         spin_unlock_irq(&dev->spinlock);
 127         return 0;
 128 }
 129
 130 static void stream_stop(struct snd_usb_caiaqdev *dev)
 131 {
 132         int i;
 133
 134         debug("stream_stop(%p)\n", dev);
 135         if (!dev->streaming)
 136                 return;
 137
 138         dev->streaming = 0;
 139         for (i = 0; i < N_URBS; i++) {
 140                 usb_unlink_urb(dev->data_urbs_in[i]);
 141                 usb_unlink_urb(dev->data_urbs_out[i]);
 142         }
 143 }
 144
 145 static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
 146 {
 147         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
 148         debug("snd_usb_caiaq_substream_open(%p)\n", substream);
 149         substream->runtime->hw = dev->pcm_info;
 150         snd_pcm_limit_hw_rates(substream->runtime);
 151         return 0;
 152 }
 153
 154 static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
 155 {
 156         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
 157
 158         debug("snd_usb_caiaq_substream_close(%p)\n", substream);
 159         if (all_substreams_zero(dev->sub_playback) &&
 160             all_substreams_zero(dev->sub_capture)) {
 161                 /* when the last client has stopped streaming,
 162                  * all sample rates are allowed again */
 163                 stream_stop(dev);
 164                 dev->pcm_info.rates = dev->samplerates;
 165         }
 166
 167         return 0;
 168 }
 169
 170 static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
 171                                         struct snd_pcm_hw_params *hw_params)
 172 {
 173         debug("snd_usb_caiaq_pcm_hw_params(%p)\n", sub);
 174         return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params));
 175 }
 176
 177 static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
 178 {
 179         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
 180         debug("snd_usb_caiaq_pcm_hw_free(%p)\n", sub);
 181         spin_lock_irq(&dev->spinlock);
 182         deactivate_substream(dev, sub);
 183         spin_unlock_irq(&dev->spinlock);
 184         return snd_pcm_lib_free_pages(sub);
 185 }
 186
 187 /* this should probably go upstream */
 188 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
 189 #error "Change this table"
 190 #endif
 191
 192 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
 193                                  48000, 64000, 88200, 96000, 176400, 192000 };
 194
 195 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
 196 {
 197         int bytes_per_sample, bpp, ret, i;
 198         int index = substream->number;
 199         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
 200         struct snd_pcm_runtime *runtime = substream->runtime;
 201
 202         debug("snd_usb_caiaq_pcm_prepare(%p)\n", substream);
 203
 204         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 205                 dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
 206         else
 207                 dev->audio_in_buf_pos[index] = 0;
 208
 209         if (dev->streaming)
 210                 return 0;
 211
 212         /* the first client that opens a stream defines the sample rate
 213          * setting for all subsequent calls, until the last client closed. */
 214         for (i=0; i < ARRAY_SIZE(rates); i++)
 215                 if (runtime->rate == rates[i])
 216                         dev->pcm_info.rates = 1 << i;
 217
 218         snd_pcm_limit_hw_rates(runtime);
 219
 220         bytes_per_sample = BYTES_PER_SAMPLE;
 221         if (dev->spec.data_alignment == 2)
 222                 bytes_per_sample++;
 223
 224         bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
 225                 * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
 226
 227         ret = snd_usb_caiaq_set_audio_params(dev, runtime->rate,
 228                                              runtime->sample_bits, bpp);
 229         if (ret)
 230                 return ret;
 231
 232         ret = stream_start(dev);
 233         if (ret)
 234                 return ret;
 235
 236         dev->output_running = 0;
 237         wait_event_timeout(dev->prepare_wait_queue, dev->output_running, HZ);
 238         if (!dev->output_running) {
 239                 stream_stop(dev);
 240                 return -EPIPE;
 241         }
 242
 243         return 0;
 244 }
 245
 246 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
 247 {
 248         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
 249
 250         switch (cmd) {
 251         case SNDRV_PCM_TRIGGER_START:
 252         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 253                 spin_lock(&dev->spinlock);
 254                 activate_substream(dev, sub);
 255                 spin_unlock(&dev->spinlock);
 256                 break;
 257         case SNDRV_PCM_TRIGGER_STOP:
 258         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 259                 spin_lock(&dev->spinlock);
 260                 deactivate_substream(dev, sub);
 261                 spin_unlock(&dev->spinlock);
 262                 break;
 263         default:
 264                 return -EINVAL;
 265         }
 266
 267         return 0;
 268 }
 269
 270 static snd_pcm_uframes_t
 271 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
 272 {
 273         int index = sub->number;
 274         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
 275
 276         if (dev->input_panic || dev->output_panic)
 277                 return SNDRV_PCM_POS_XRUN;
 278
 279         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
 280                 return bytes_to_frames(sub->runtime,
 281                                         dev->audio_out_buf_pos[index]);
 282         else
 283                 return bytes_to_frames(sub->runtime,
 284                                         dev->audio_in_buf_pos[index]);
 285 }
 286
 287 /* operators for both playback and capture */
 288 static struct snd_pcm_ops snd_usb_caiaq_ops = {
 289         .open =         snd_usb_caiaq_substream_open,
 290         .close =        snd_usb_caiaq_substream_close,
 291         .ioctl =        snd_pcm_lib_ioctl,
 292         .hw_params =    snd_usb_caiaq_pcm_hw_params,
 293         .hw_free =      snd_usb_caiaq_pcm_hw_free,
 294         .prepare =      snd_usb_caiaq_pcm_prepare,
 295         .trigger =      snd_usb_caiaq_pcm_trigger,
 296         .pointer =      snd_usb_caiaq_pcm_pointer
 297 };
 298
 299 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
 300                                       struct snd_pcm_substream **subs)
 301 {
 302         int stream, pb, *cnt;
 303         struct snd_pcm_substream *sub;
 304
 305         for (stream = 0; stream < dev->n_streams; stream++) {
 306                 sub = subs[stream];
 307                 if (!sub)
 308                         continue;
 309
 310                 pb = frames_to_bytes(sub->runtime,
 311                                      sub->runtime->period_size);
 312                 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 313                                         &dev->period_out_count[stream] :
 314                                         &dev->period_in_count[stream];
 315
 316                 if (*cnt >= pb) {
 317                         snd_pcm_period_elapsed(sub);
 318                         *cnt %= pb;
 319                 }
 320         }
 321 }
 322
 323 static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
 324                               const struct urb *urb,
 325                               const struct usb_iso_packet_descriptor *iso)
 326 {
 327         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
 328         struct snd_pcm_substream *sub;
 329         int stream, i;
 330
 331         if (all_substreams_zero(dev->sub_capture))
 332                 return;
 333
 334         spin_lock(&dev->spinlock);
 335
 336         for (i = 0; i < iso->actual_length;) {
 337                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
 338                         sub = dev->sub_capture[stream];
 339                         if (sub) {
 340                                 struct snd_pcm_runtime *rt = sub->runtime;
 341                                 char *audio_buf = rt->dma_area;
 342                                 int sz = frames_to_bytes(rt, rt->buffer_size);
 343                                 audio_buf[dev->audio_in_buf_pos[stream]++]
 344                                         = usb_buf[i];
 345                                 dev->period_in_count[stream]++;
 346                                 if (dev->audio_in_buf_pos[stream] == sz)
 347                                         dev->audio_in_buf_pos[stream] = 0;
 348                         }
 349                 }
 350         }
 351
 352         spin_unlock(&dev->spinlock);
 353 }
 354
 355 static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
 356                               const struct urb *urb,
 357                               const struct usb_iso_packet_descriptor *iso)
 358 {
 359         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
 360         unsigned char check_byte;
 361         struct snd_pcm_substream *sub;
 362         int stream, i;
 363
 364         spin_lock(&dev->spinlock);
 365
 366         for (i = 0; i < iso->actual_length;) {
 367                 if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
 368                         for (stream = 0;
 369                              stream < dev->n_streams;
 370                              stream++, i++) {
 371                                 if (dev->first_packet)
 372                                         continue;
 373
 374                                 check_byte = MAKE_CHECKBYTE(dev, stream, i);
 375
 376                                 if ((usb_buf[i] & 0x3f) != check_byte)
 377                                         dev->input_panic = 1;
 378
 379                                 if (usb_buf[i] & 0x80)
 380                                         dev->output_panic = 1;
 381                         }
 382                 }
 383                 dev->first_packet = 0;
 384
 385                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
 386                         sub = dev->sub_capture[stream];
 387                         if (sub) {
 388                                 struct snd_pcm_runtime *rt = sub->runtime;
 389                                 char *audio_buf = rt->dma_area;
 390                                 int sz = frames_to_bytes(rt, rt->buffer_size);
 391                                 audio_buf[dev->audio_in_buf_pos[stream]++] =
 392                                         usb_buf[i];
 393                                 dev->period_in_count[stream]++;
 394                                 if (dev->audio_in_buf_pos[stream] == sz)
 395                                         dev->audio_in_buf_pos[stream] = 0;
 396                         }
 397                 }
 398         }
 399
 400         spin_unlock(&dev->spinlock);
 401 }
 402
 403 static void read_in_urb(struct snd_usb_caiaqdev *dev,
 404                         const struct urb *urb,
 405                         const struct usb_iso_packet_descriptor *iso)
 406 {
 407         if (!dev->streaming)
 408                 return;
 409
 410         switch (dev->spec.data_alignment) {
 411         case 0:
 412                 read_in_urb_mode0(dev, urb, iso);
 413                 break;
 414         case 2:
 415                 read_in_urb_mode2(dev, urb, iso);
 416                 break;
 417         }
 418
 419         if (dev->input_panic || dev->output_panic) {
 420                 debug("streaming error detected %s %s\n",
 421                                 dev->input_panic ? "(input)" : "",
 422                                 dev->output_panic ? "(output)" : "");
 423         }
 424
 425         check_for_elapsed_periods(dev, dev->sub_capture);
 426 }
 427
 428 static void fill_out_urb(struct snd_usb_caiaqdev *dev,
 429                          struct urb *urb,
 430                          const struct usb_iso_packet_descriptor *iso)
 431 {
 432         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
 433         struct snd_pcm_substream *sub;
 434         int stream, i;
 435
 436         spin_lock(&dev->spinlock);
 437
 438         for (i = 0; i < iso->length;) {
 439                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
 440                         sub = dev->sub_playback[stream];
 441                         if (sub) {
 442                                 struct snd_pcm_runtime *rt = sub->runtime;
 443                                 char *audio_buf = rt->dma_area;
 444                                 int sz = frames_to_bytes(rt, rt->buffer_size);
 445                                 usb_buf[i] =
 446                                         audio_buf[dev->audio_out_buf_pos[stream]];
 447                                 dev->period_out_count[stream]++;
 448                                 dev->audio_out_buf_pos[stream]++;
 449                                 if (dev->audio_out_buf_pos[stream] == sz)
 450                                         dev->audio_out_buf_pos[stream] = 0;
 451                         } else
 452                                 usb_buf[i] = 0;
 453                 }
 454
 455                 /* fill in the check bytes */
 456                 if (dev->spec.data_alignment == 2 &&
 457                     i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
 458                         (dev->n_streams * CHANNELS_PER_STREAM))
 459                     for (stream = 0; stream < dev->n_streams; stream++, i++)
 460                         usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
 461         }
 462
 463         spin_unlock(&dev->spinlock);
 464         check_for_elapsed_periods(dev, dev->sub_playback);
 465 }
 466
 467 static void read_completed(struct urb *urb)
 468 {
 469         struct snd_usb_caiaq_cb_info *info = urb->context;
 470         struct snd_usb_caiaqdev *dev;
 471         struct urb *out;
 472         int frame, len, send_it = 0, outframe = 0;
 473
 474         if (urb->status || !info)
 475                 return;
 476
 477         dev = info->dev;
 478         if (!dev->streaming)
 479                 return;
 480
 481         out = dev->data_urbs_out[info->index];
 482
 483         /* read the recently received packet and send back one which has
 484          * the same layout */
 485         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
 486                 if (urb->iso_frame_desc[frame].status)
 487                         continue;
 488
 489                 len = urb->iso_frame_desc[outframe].actual_length;
 490                 out->iso_frame_desc[outframe].length = len;
 491                 out->iso_frame_desc[outframe].actual_length = 0;
 492                 out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame;
 493
 494                 if (len > 0) {
 495                         fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
 496                         read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
 497                         send_it = 1;
 498                 }
 499
 500                 outframe++;
 501         }
 502
 503         if (send_it) {
 504                 out->number_of_packets = FRAMES_PER_URB;
 505                 out->transfer_flags = URB_ISO_ASAP;
 506                 usb_submit_urb(out, GFP_ATOMIC);
 507         }
 508
 509         /* re-submit inbound urb */
 510         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
 511                 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
 512                 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
 513                 urb->iso_frame_desc[frame].actual_length = 0;
 514         }
 515
 516         urb->number_of_packets = FRAMES_PER_URB;
 517         urb->transfer_flags = URB_ISO_ASAP;
 518         usb_submit_urb(urb, GFP_ATOMIC);
 519 }
 520
 521 static void write_completed(struct urb *urb)
 522 {
 523         struct snd_usb_caiaq_cb_info *info = urb->context;
 524         struct snd_usb_caiaqdev *dev = info->dev;
 525
 526         if (!dev->output_running) {
 527                 dev->output_running = 1;
 528                 wake_up(&dev->prepare_wait_queue);
 529         }
 530 }
 531
 532 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
 533 {
 534         int i, frame;
 535         struct urb **urbs;
 536         struct usb_device *usb_dev = dev->chip.dev;
 537         unsigned int pipe;
 538
 539         pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
 540                 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
 541                 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
 542
 543         urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
 544         if (!urbs) {
 545                 log("unable to kmalloc() urbs, OOM!?\n");
 546                 *ret = -ENOMEM;
 547                 return NULL;
 548         }
 549
 550         for (i = 0; i < N_URBS; i++) {
 551                 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
 552                 if (!urbs[i]) {
 553                         log("unable to usb_alloc_urb(), OOM!?\n");
 554                         *ret = -ENOMEM;
 555                         return urbs;
 556                 }
 557
 558                 urbs[i]->transfer_buffer =
 559                         kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
 560                 if (!urbs[i]->transfer_buffer) {
 561                         log("unable to kmalloc() transfer buffer, OOM!?\n");
 562                         *ret = -ENOMEM;
 563                         return urbs;
 564                 }
 565
 566                 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
 567                         struct usb_iso_packet_descriptor *iso =
 568                                 &urbs[i]->iso_frame_desc[frame];
 569
 570                         iso->offset = BYTES_PER_FRAME * frame;
 571                         iso->length = BYTES_PER_FRAME;
 572                 }
 573
 574                 urbs[i]->dev = usb_dev;
 575                 urbs[i]->pipe = pipe;
 576                 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
 577                                                 * BYTES_PER_FRAME;
 578                 urbs[i]->context = &dev->data_cb_info[i];
 579                 urbs[i]->interval = 1;
 580                 urbs[i]->transfer_flags = URB_ISO_ASAP;
 581                 urbs[i]->number_of_packets = FRAMES_PER_URB;
 582                 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
 583                                         read_completed : write_completed;
 584         }
 585
 586         *ret = 0;
 587         return urbs;
 588 }
 589
 590 static void free_urbs(struct urb **urbs)
 591 {
 592         int i;
 593
 594         if (!urbs)
 595                 return;
 596
 597         for (i = 0; i < N_URBS; i++) {
 598                 if (!urbs[i])
 599                         continue;
 600
 601                 usb_kill_urb(urbs[i]);
 602                 kfree(urbs[i]->transfer_buffer);
 603                 usb_free_urb(urbs[i]);
 604         }
 605
 606         kfree(urbs);
 607 }
 608
 609 int __devinit snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
 610 {
 611         int i, ret;
 612
 613         dev->n_audio_in  = max(dev->spec.num_analog_audio_in,
 614                                dev->spec.num_digital_audio_in) /
 615                                 CHANNELS_PER_STREAM;
 616         dev->n_audio_out = max(dev->spec.num_analog_audio_out,
 617                                dev->spec.num_digital_audio_out) /
 618                                 CHANNELS_PER_STREAM;
 619         dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
 620
 621         debug("dev->n_audio_in = %d\n", dev->n_audio_in);
 622         debug("dev->n_audio_out = %d\n", dev->n_audio_out);
 623         debug("dev->n_streams = %d\n", dev->n_streams);
 624
 625         if (dev->n_streams > MAX_STREAMS) {
 626                 log("unable to initialize device, too many streams.\n");
 627                 return -EINVAL;
 628         }
 629
 630         ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
 631                         dev->n_audio_out, dev->n_audio_in, &dev->pcm);
 632
 633         if (ret < 0) {
 634                 log("snd_pcm_new() returned %d\n", ret);
 635                 return ret;
 636         }
 637
 638         dev->pcm->private_data = dev;
 639         strcpy(dev->pcm->name, dev->product_name);
 640
 641         memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
 642         memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
 643
 644         memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
 645                         sizeof(snd_usb_caiaq_pcm_hardware));
 646
 647         /* setup samplerates */
 648         dev->samplerates = dev->pcm_info.rates;
 649         switch (dev->chip.usb_id) {
 650         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
 651         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
 652                 dev->samplerates |= SNDRV_PCM_RATE_88200;
 653                 dev->samplerates |= SNDRV_PCM_RATE_192000;
 654                 break;
 655         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
 656                 dev->samplerates |= SNDRV_PCM_RATE_88200;
 657                 break;
 658         }
 659
 660         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
 661                                 &snd_usb_caiaq_ops);
 662         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
 663                                 &snd_usb_caiaq_ops);
 664
 665         snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
 666                                         SNDRV_DMA_TYPE_CONTINUOUS,
 667                                         snd_dma_continuous_data(GFP_KERNEL),
 668                                         MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
 669
 670         dev->data_cb_info =
 671                 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
 672                                         GFP_KERNEL);
 673
 674         if (!dev->data_cb_info)
 675                 return -ENOMEM;
 676
 677         for (i = 0; i < N_URBS; i++) {
 678                 dev->data_cb_info[i].dev = dev;
 679                 dev->data_cb_info[i].index = i;
 680         }
 681
 682         dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
 683         if (ret < 0) {
 684                 kfree(dev->data_cb_info);
 685                 free_urbs(dev->data_urbs_in);
 686                 return ret;
 687         }
 688
 689         dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
 690         if (ret < 0) {
 691                 kfree(dev->data_cb_info);
 692                 free_urbs(dev->data_urbs_in);
 693                 free_urbs(dev->data_urbs_out);
 694                 return ret;
 695         }
 696
 697         return 0;
 698 }
 699
 700 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
 701 {
 702         debug("snd_usb_caiaq_audio_free (%p)\n", dev);
 703         stream_stop(dev);
 704         free_urbs(dev->data_urbs_in);
 705         free_urbs(dev->data_urbs_out);
 706         kfree(dev->data_cb_info);
 707 }
 708