sound/usb/caiaq/audio.c

   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/init.h>
  21 #include <linux/usb.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24
  25 #include "device.h"
  26 #include "audio.h"
  27
  28 #define N_URBS                  32
  29 #define CLOCK_DRIFT_TOLERANCE   5
  30 #define FRAMES_PER_URB          8
  31 #define BYTES_PER_FRAME         512
  32 #define CHANNELS_PER_STREAM     2
  33 #define BYTES_PER_SAMPLE        3
  34 #define BYTES_PER_SAMPLE_USB    4
  35 #define MAX_BUFFER_SIZE         (128*1024)
  36 #define MAX_ENDPOINT_SIZE       512
  37
  38 #define ENDPOINT_CAPTURE        2
  39 #define ENDPOINT_PLAYBACK       6
  40
  41 #define MAKE_CHECKBYTE(dev,stream,i) \
  42         (stream << 1) | (~(i / (dev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
  43
  44 static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
  45         .info           = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
  46                            SNDRV_PCM_INFO_BLOCK_TRANSFER),
  47         .formats        = SNDRV_PCM_FMTBIT_S24_3BE,
  48         .rates          = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
  49                            SNDRV_PCM_RATE_96000),
  50         .rate_min       = 44100,
  51         .rate_max       = 0, /* will overwrite later */
  52         .channels_min   = CHANNELS_PER_STREAM,
  53         .channels_max   = CHANNELS_PER_STREAM,
  54         .buffer_bytes_max = MAX_BUFFER_SIZE,
  55         .period_bytes_min = 128,
  56         .period_bytes_max = MAX_BUFFER_SIZE,
  57         .periods_min    = 1,
  58         .periods_max    = 1024,
  59 };
  60
  61 static void
  62 activate_substream(struct snd_usb_caiaqdev *dev,
  63                    struct snd_pcm_substream *sub)
  64 {
  65         spin_lock(&dev->spinlock);
  66
  67         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
  68                 dev->sub_playback[sub->number] = sub;
  69         else
  70                 dev->sub_capture[sub->number] = sub;
  71
  72         spin_unlock(&dev->spinlock);
  73 }
  74
  75 static void
  76 deactivate_substream(struct snd_usb_caiaqdev *dev,
  77                      struct snd_pcm_substream *sub)
  78 {
  79         unsigned long flags;
  80         spin_lock_irqsave(&dev->spinlock, flags);
  81
  82         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
  83                 dev->sub_playback[sub->number] = NULL;
  84         else
  85                 dev->sub_capture[sub->number] = NULL;
  86
  87         spin_unlock_irqrestore(&dev->spinlock, flags);
  88 }
  89
  90 static int
  91 all_substreams_zero(struct snd_pcm_substream **subs)
  92 {
  93         int i;
  94         for (i = 0; i < MAX_STREAMS; i++)
  95                 if (subs[i] != NULL)
  96                         return 0;
  97         return 1;
  98 }
  99
 100 static int stream_start(struct snd_usb_caiaqdev *dev)
 101 {
 102         int i, ret;
 103
 104         debug("%s(%p)\n", __func__, dev);
 105
 106         if (dev->streaming)
 107                 return -EINVAL;
 108
 109         memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
 110         memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
 111         dev->input_panic = 0;
 112         dev->output_panic = 0;
 113         dev->first_packet = 1;
 114         dev->streaming = 1;
 115         dev->warned = 0;
 116
 117         for (i = 0; i < N_URBS; i++) {
 118                 ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC);
 119                 if (ret) {
 120                         log("unable to trigger read #%d! (ret %d)\n", i, ret);
 121                         dev->streaming = 0;
 122                         return -EPIPE;
 123                 }
 124         }
 125
 126         return 0;
 127 }
 128
 129 static void stream_stop(struct snd_usb_caiaqdev *dev)
 130 {
 131         int i;
 132
 133         debug("%s(%p)\n", __func__, dev);
 134         if (!dev->streaming)
 135                 return;
 136
 137         dev->streaming = 0;
 138
 139         for (i = 0; i < N_URBS; i++) {
 140                 usb_kill_urb(dev->data_urbs_in[i]);
 141                 usb_kill_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("%s(%p)\n", __func__, 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("%s(%p)\n", __func__, 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("%s(%p)\n", __func__, 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("%s(%p)\n", __func__, sub);
 181         deactivate_substream(dev, sub);
 182         return snd_pcm_lib_free_pages(sub);
 183 }
 184
 185 /* this should probably go upstream */
 186 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
 187 #error "Change this table"
 188 #endif
 189
 190 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
 191                                  48000, 64000, 88200, 96000, 176400, 192000 };
 192
 193 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
 194 {
 195         int bytes_per_sample, bpp, ret, i;
 196         int index = substream->number;
 197         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
 198         struct snd_pcm_runtime *runtime = substream->runtime;
 199
 200         debug("%s(%p)\n", __func__, substream);
 201
 202         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 203                 dev->period_out_count[index] = BYTES_PER_SAMPLE + 1;
 204                 dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
 205         } else {
 206                 int in_pos = (dev->spec.data_alignment == 2) ? 0 : 2;
 207                 dev->period_in_count[index] = BYTES_PER_SAMPLE + in_pos;
 208                 dev->audio_in_buf_pos[index] = BYTES_PER_SAMPLE + in_pos;
 209         }
 210
 211         if (dev->streaming)
 212                 return 0;
 213
 214         /* the first client that opens a stream defines the sample rate
 215          * setting for all subsequent calls, until the last client closed. */
 216         for (i=0; i < ARRAY_SIZE(rates); i++)
 217                 if (runtime->rate == rates[i])
 218                         dev->pcm_info.rates = 1 << i;
 219
 220         snd_pcm_limit_hw_rates(runtime);
 221
 222         bytes_per_sample = BYTES_PER_SAMPLE;
 223         if (dev->spec.data_alignment == 2)
 224                 bytes_per_sample++;
 225
 226         bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
 227                 * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
 228
 229         if (bpp > MAX_ENDPOINT_SIZE)
 230                 bpp = MAX_ENDPOINT_SIZE;
 231
 232         ret = snd_usb_caiaq_set_audio_params(dev, runtime->rate,
 233                                              runtime->sample_bits, bpp);
 234         if (ret)
 235                 return ret;
 236
 237         ret = stream_start(dev);
 238         if (ret)
 239                 return ret;
 240
 241         dev->output_running = 0;
 242         wait_event_timeout(dev->prepare_wait_queue, dev->output_running, HZ);
 243         if (!dev->output_running) {
 244                 stream_stop(dev);
 245                 return -EPIPE;
 246         }
 247
 248         return 0;
 249 }
 250
 251 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
 252 {
 253         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
 254
 255         switch (cmd) {
 256         case SNDRV_PCM_TRIGGER_START:
 257         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 258                 activate_substream(dev, sub);
 259                 break;
 260         case SNDRV_PCM_TRIGGER_STOP:
 261         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 262                 deactivate_substream(dev, sub);
 263                 break;
 264         default:
 265                 return -EINVAL;
 266         }
 267
 268         return 0;
 269 }
 270
 271 static snd_pcm_uframes_t
 272 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
 273 {
 274         int index = sub->number;
 275         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
 276         snd_pcm_uframes_t ptr;
 277
 278         spin_lock(&dev->spinlock);
 279
 280         if (dev->input_panic || dev->output_panic)
 281                 ptr = SNDRV_PCM_POS_XRUN;
 282
 283         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
 284                 ptr = bytes_to_frames(sub->runtime,
 285                                         dev->audio_out_buf_pos[index]);
 286         else
 287                 ptr = bytes_to_frames(sub->runtime,
 288                                         dev->audio_in_buf_pos[index]);
 289
 290         spin_unlock(&dev->spinlock);
 291         return ptr;
 292 }
 293
 294 /* operators for both playback and capture */
 295 static struct snd_pcm_ops snd_usb_caiaq_ops = {
 296         .open =         snd_usb_caiaq_substream_open,
 297         .close =        snd_usb_caiaq_substream_close,
 298         .ioctl =        snd_pcm_lib_ioctl,
 299         .hw_params =    snd_usb_caiaq_pcm_hw_params,
 300         .hw_free =      snd_usb_caiaq_pcm_hw_free,
 301         .prepare =      snd_usb_caiaq_pcm_prepare,
 302         .trigger =      snd_usb_caiaq_pcm_trigger,
 303         .pointer =      snd_usb_caiaq_pcm_pointer
 304 };
 305
 306 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
 307                                       struct snd_pcm_substream **subs)
 308 {
 309         int stream, pb, *cnt;
 310         struct snd_pcm_substream *sub;
 311
 312         for (stream = 0; stream < dev->n_streams; stream++) {
 313                 sub = subs[stream];
 314                 if (!sub)
 315                         continue;
 316
 317                 pb = snd_pcm_lib_period_bytes(sub);
 318                 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 319                                         &dev->period_out_count[stream] :
 320                                         &dev->period_in_count[stream];
 321
 322                 if (*cnt >= pb) {
 323                         snd_pcm_period_elapsed(sub);
 324                         *cnt %= pb;
 325                 }
 326         }
 327 }
 328
 329 static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
 330                               const struct urb *urb,
 331                               const struct usb_iso_packet_descriptor *iso)
 332 {
 333         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
 334         struct snd_pcm_substream *sub;
 335         int stream, i;
 336
 337         if (all_substreams_zero(dev->sub_capture))
 338                 return;
 339
 340         for (i = 0; i < iso->actual_length;) {
 341                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
 342                         sub = dev->sub_capture[stream];
 343                         if (sub) {
 344                                 struct snd_pcm_runtime *rt = sub->runtime;
 345                                 char *audio_buf = rt->dma_area;
 346                                 int sz = frames_to_bytes(rt, rt->buffer_size);
 347                                 audio_buf[dev->audio_in_buf_pos[stream]++]
 348                                         = usb_buf[i];
 349                                 dev->period_in_count[stream]++;
 350                                 if (dev->audio_in_buf_pos[stream] == sz)
 351                                         dev->audio_in_buf_pos[stream] = 0;
 352                         }
 353                 }
 354         }
 355 }
 356
 357 static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
 358                               const struct urb *urb,
 359                               const struct usb_iso_packet_descriptor *iso)
 360 {
 361         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
 362         unsigned char check_byte;
 363         struct snd_pcm_substream *sub;
 364         int stream, i;
 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 (dev->input_panic)
 388                                 usb_buf[i] = 0;
 389
 390                         if (sub) {
 391                                 struct snd_pcm_runtime *rt = sub->runtime;
 392                                 char *audio_buf = rt->dma_area;
 393                                 int sz = frames_to_bytes(rt, rt->buffer_size);
 394                                 audio_buf[dev->audio_in_buf_pos[stream]++] =
 395                                         usb_buf[i];
 396                                 dev->period_in_count[stream]++;
 397                                 if (dev->audio_in_buf_pos[stream] == sz)
 398                                         dev->audio_in_buf_pos[stream] = 0;
 399                         }
 400                 }
 401         }
 402 }
 403
 404 static void read_in_urb(struct snd_usb_caiaqdev *dev,
 405                         const struct urb *urb,
 406                         const struct usb_iso_packet_descriptor *iso)
 407 {
 408         if (!dev->streaming)
 409                 return;
 410
 411         if (iso->actual_length < dev->bpp)
 412                 return;
 413
 414         switch (dev->spec.data_alignment) {
 415         case 0:
 416                 read_in_urb_mode0(dev, urb, iso);
 417                 break;
 418         case 2:
 419                 read_in_urb_mode2(dev, urb, iso);
 420                 break;
 421         }
 422
 423         if ((dev->input_panic || dev->output_panic) && !dev->warned) {
 424                 debug("streaming error detected %s %s\n",
 425                                 dev->input_panic ? "(input)" : "",
 426                                 dev->output_panic ? "(output)" : "");
 427                 dev->warned = 1;
 428         }
 429 }
 430
 431 static void fill_out_urb(struct snd_usb_caiaqdev *dev,
 432                          struct urb *urb,
 433                          const struct usb_iso_packet_descriptor *iso)
 434 {
 435         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
 436         struct snd_pcm_substream *sub;
 437         int stream, i;
 438
 439         for (i = 0; i < iso->length;) {
 440                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
 441                         sub = dev->sub_playback[stream];
 442                         if (sub) {
 443                                 struct snd_pcm_runtime *rt = sub->runtime;
 444                                 char *audio_buf = rt->dma_area;
 445                                 int sz = frames_to_bytes(rt, rt->buffer_size);
 446                                 usb_buf[i] =
 447                                         audio_buf[dev->audio_out_buf_pos[stream]];
 448                                 dev->period_out_count[stream]++;
 449                                 dev->audio_out_buf_pos[stream]++;
 450                                 if (dev->audio_out_buf_pos[stream] == sz)
 451                                         dev->audio_out_buf_pos[stream] = 0;
 452                         } else
 453                                 usb_buf[i] = 0;
 454                 }
 455
 456                 /* fill in the check bytes */
 457                 if (dev->spec.data_alignment == 2 &&
 458                     i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
 459                         (dev->n_streams * CHANNELS_PER_STREAM))
 460                     for (stream = 0; stream < dev->n_streams; stream++, i++)
 461                         usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
 462         }
 463 }
 464
 465 static void read_completed(struct urb *urb)
 466 {
 467         struct snd_usb_caiaq_cb_info *info = urb->context;
 468         struct snd_usb_caiaqdev *dev;
 469         struct urb *out;
 470         int frame, len, send_it = 0, outframe = 0;
 471
 472         if (urb->status || !info)
 473                 return;
 474
 475         dev = info->dev;
 476
 477         if (!dev->streaming)
 478                 return;
 479
 480         out = dev->data_urbs_out[info->index];
 481
 482         /* read the recently received packet and send back one which has
 483          * the same layout */
 484         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
 485                 if (urb->iso_frame_desc[frame].status)
 486                         continue;
 487
 488                 len = urb->iso_frame_desc[outframe].actual_length;
 489                 out->iso_frame_desc[outframe].length = len;
 490                 out->iso_frame_desc[outframe].actual_length = 0;
 491                 out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame;
 492
 493                 if (len > 0) {
 494                         spin_lock(&dev->spinlock);
 495                         fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
 496                         read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
 497                         spin_unlock(&dev->spinlock);
 498                         check_for_elapsed_periods(dev, dev->sub_playback);
 499                         check_for_elapsed_periods(dev, dev->sub_capture);
 500                         send_it = 1;
 501                 }
 502
 503                 outframe++;
 504         }
 505
 506         if (send_it) {
 507                 out->number_of_packets = FRAMES_PER_URB;
 508                 out->transfer_flags = URB_ISO_ASAP;
 509                 usb_submit_urb(out, GFP_ATOMIC);
 510         }
 511
 512         /* re-submit inbound urb */
 513         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
 514                 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
 515                 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
 516                 urb->iso_frame_desc[frame].actual_length = 0;
 517         }
 518
 519         urb->number_of_packets = FRAMES_PER_URB;
 520         urb->transfer_flags = URB_ISO_ASAP;
 521         usb_submit_urb(urb, GFP_ATOMIC);
 522 }
 523
 524 static void write_completed(struct urb *urb)
 525 {
 526         struct snd_usb_caiaq_cb_info *info = urb->context;
 527         struct snd_usb_caiaqdev *dev = info->dev;
 528
 529         if (!dev->output_running) {
 530                 dev->output_running = 1;
 531                 wake_up(&dev->prepare_wait_queue);
 532         }
 533 }
 534
 535 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
 536 {
 537         int i, frame;
 538         struct urb **urbs;
 539         struct usb_device *usb_dev = dev->chip.dev;
 540         unsigned int pipe;
 541
 542         pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
 543                 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
 544                 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
 545
 546         urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
 547         if (!urbs) {
 548                 log("unable to kmalloc() urbs, OOM!?\n");
 549                 *ret = -ENOMEM;
 550                 return NULL;
 551         }
 552
 553         for (i = 0; i < N_URBS; i++) {
 554                 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
 555                 if (!urbs[i]) {
 556                         log("unable to usb_alloc_urb(), OOM!?\n");
 557                         *ret = -ENOMEM;
 558                         return urbs;
 559                 }
 560
 561                 urbs[i]->transfer_buffer =
 562                         kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
 563                 if (!urbs[i]->transfer_buffer) {
 564                         log("unable to kmalloc() transfer buffer, OOM!?\n");
 565                         *ret = -ENOMEM;
 566                         return urbs;
 567                 }
 568
 569                 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
 570                         struct usb_iso_packet_descriptor *iso =
 571                                 &urbs[i]->iso_frame_desc[frame];
 572
 573                         iso->offset = BYTES_PER_FRAME * frame;
 574                         iso->length = BYTES_PER_FRAME;
 575                 }
 576
 577                 urbs[i]->dev = usb_dev;
 578                 urbs[i]->pipe = pipe;
 579                 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
 580                                                 * BYTES_PER_FRAME;
 581                 urbs[i]->context = &dev->data_cb_info[i];
 582                 urbs[i]->interval = 1;
 583                 urbs[i]->transfer_flags = URB_ISO_ASAP;
 584                 urbs[i]->number_of_packets = FRAMES_PER_URB;
 585                 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
 586                                         read_completed : write_completed;
 587         }
 588
 589         *ret = 0;
 590         return urbs;
 591 }
 592
 593 static void free_urbs(struct urb **urbs)
 594 {
 595         int i;
 596
 597         if (!urbs)
 598                 return;
 599
 600         for (i = 0; i < N_URBS; i++) {
 601                 if (!urbs[i])
 602                         continue;
 603
 604                 usb_kill_urb(urbs[i]);
 605                 kfree(urbs[i]->transfer_buffer);
 606                 usb_free_urb(urbs[i]);
 607         }
 608
 609         kfree(urbs);
 610 }
 611
 612 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
 613 {
 614         int i, ret;
 615
 616         dev->n_audio_in  = max(dev->spec.num_analog_audio_in,
 617                                dev->spec.num_digital_audio_in) /
 618                                 CHANNELS_PER_STREAM;
 619         dev->n_audio_out = max(dev->spec.num_analog_audio_out,
 620                                dev->spec.num_digital_audio_out) /
 621                                 CHANNELS_PER_STREAM;
 622         dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
 623
 624         debug("dev->n_audio_in = %d\n", dev->n_audio_in);
 625         debug("dev->n_audio_out = %d\n", dev->n_audio_out);
 626         debug("dev->n_streams = %d\n", dev->n_streams);
 627
 628         if (dev->n_streams > MAX_STREAMS) {
 629                 log("unable to initialize device, too many streams.\n");
 630                 return -EINVAL;
 631         }
 632
 633         ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
 634                         dev->n_audio_out, dev->n_audio_in, &dev->pcm);
 635
 636         if (ret < 0) {
 637                 log("snd_pcm_new() returned %d\n", ret);
 638                 return ret;
 639         }
 640
 641         dev->pcm->private_data = dev;
 642         strcpy(dev->pcm->name, dev->product_name);
 643
 644         memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
 645         memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
 646
 647         memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
 648                         sizeof(snd_usb_caiaq_pcm_hardware));
 649
 650         /* setup samplerates */
 651         dev->samplerates = dev->pcm_info.rates;
 652         switch (dev->chip.usb_id) {
 653         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
 654         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
 655         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
 656         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
 657                 dev->samplerates |= SNDRV_PCM_RATE_192000;
 658                 /* fall thru */
 659         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
 660         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
 661         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
 662                 dev->samplerates |= SNDRV_PCM_RATE_88200;
 663                 break;
 664         }
 665
 666         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
 667                                 &snd_usb_caiaq_ops);
 668         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
 669                                 &snd_usb_caiaq_ops);
 670
 671         snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
 672                                         SNDRV_DMA_TYPE_CONTINUOUS,
 673                                         snd_dma_continuous_data(GFP_KERNEL),
 674                                         MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
 675
 676         dev->data_cb_info =
 677                 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
 678                                         GFP_KERNEL);
 679
 680         if (!dev->data_cb_info)
 681                 return -ENOMEM;
 682
 683         for (i = 0; i < N_URBS; i++) {
 684                 dev->data_cb_info[i].dev = dev;
 685                 dev->data_cb_info[i].index = i;
 686         }
 687
 688         dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
 689         if (ret < 0) {
 690                 kfree(dev->data_cb_info);
 691                 free_urbs(dev->data_urbs_in);
 692                 return ret;
 693         }
 694
 695         dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
 696         if (ret < 0) {
 697                 kfree(dev->data_cb_info);
 698                 free_urbs(dev->data_urbs_in);
 699                 free_urbs(dev->data_urbs_out);
 700                 return ret;
 701         }
 702
 703         return 0;
 704 }
 705
 706 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
 707 {
 708         debug("%s(%p)\n", __func__, dev);
 709         stream_stop(dev);
 710         free_urbs(dev->data_urbs_in);
 711         free_urbs(dev->data_urbs_out);
 712         kfree(dev->data_cb_info);
 713 }
 714