ALSA: snd-usb-caiaq: rename files to remove redundant information in file pathes
[linux-2.6.git] / 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         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
66                 dev->sub_playback[sub->number] = sub;
67         else
68                 dev->sub_capture[sub->number] = sub;
69 }
70
71 static void 
72 deactivate_substream(struct snd_usb_caiaqdev *dev,
73                      struct snd_pcm_substream *sub)
74 {
75         unsigned long flags;
76         spin_lock_irqsave(&dev->spinlock, flags);
77
78         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
79                 dev->sub_playback[sub->number] = NULL;
80         else
81                 dev->sub_capture[sub->number] = NULL;
82
83         spin_unlock_irqrestore(&dev->spinlock, flags);
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("%s(%p)\n", __func__, dev);
101
102         if (dev->streaming)
103                 return -EINVAL;
104
105         memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
106         memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
107         dev->input_panic = 0;
108         dev->output_panic = 0;
109         dev->first_packet = 1;
110         dev->streaming = 1;
111         dev->warned = 0;
112
113         for (i = 0; i < N_URBS; i++) {
114                 ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC);
115                 if (ret) {
116                         log("unable to trigger read #%d! (ret %d)\n", i, ret);
117                         dev->streaming = 0;
118                         return -EPIPE;
119                 }
120         }
121         
122         return 0;
123 }
124
125 static void stream_stop(struct snd_usb_caiaqdev *dev)
126 {
127         int i;
128
129         debug("%s(%p)\n", __func__, dev);
130         if (!dev->streaming)
131                 return;
132         
133         dev->streaming = 0;
134
135         for (i = 0; i < N_URBS; i++) {
136                 usb_kill_urb(dev->data_urbs_in[i]);
137                 usb_kill_urb(dev->data_urbs_out[i]);
138         }
139 }
140
141 static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
142 {
143         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
144         debug("%s(%p)\n", __func__, substream);
145         substream->runtime->hw = dev->pcm_info;
146         snd_pcm_limit_hw_rates(substream->runtime);
147         return 0;
148 }
149
150 static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
151 {
152         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
153
154         debug("%s(%p)\n", __func__, substream);
155         if (all_substreams_zero(dev->sub_playback) &&
156             all_substreams_zero(dev->sub_capture)) {
157                 /* when the last client has stopped streaming, 
158                  * all sample rates are allowed again */
159                 stream_stop(dev);
160                 dev->pcm_info.rates = dev->samplerates;
161         }
162
163         return 0;
164 }
165
166 static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
167                                         struct snd_pcm_hw_params *hw_params)
168 {
169         debug("%s(%p)\n", __func__, sub);
170         return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params));
171 }
172
173 static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
174 {
175         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
176         debug("%s(%p)\n", __func__, sub);
177         deactivate_substream(dev, sub);
178         return snd_pcm_lib_free_pages(sub);
179 }
180
181 /* this should probably go upstream */
182 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
183 #error "Change this table"
184 #endif
185
186 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
187                                  48000, 64000, 88200, 96000, 176400, 192000 };
188
189 static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
190 {
191         int bytes_per_sample, bpp, ret, i;
192         int index = substream->number;
193         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
194         struct snd_pcm_runtime *runtime = substream->runtime;
195
196         debug("%s(%p)\n", __func__, substream);
197         
198         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
199                 dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
200         else
201                 dev->audio_in_buf_pos[index] = BYTES_PER_SAMPLE;
202         
203         if (dev->streaming)
204                 return 0;
205         
206         /* the first client that opens a stream defines the sample rate
207          * setting for all subsequent calls, until the last client closed. */
208         for (i=0; i < ARRAY_SIZE(rates); i++)
209                 if (runtime->rate == rates[i])
210                         dev->pcm_info.rates = 1 << i;
211         
212         snd_pcm_limit_hw_rates(runtime);
213
214         bytes_per_sample = BYTES_PER_SAMPLE;
215         if (dev->spec.data_alignment == 2)
216                 bytes_per_sample++;
217         
218         bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
219                 * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
220
221         if (bpp > MAX_ENDPOINT_SIZE)
222                 bpp = MAX_ENDPOINT_SIZE;
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                 activate_substream(dev, sub);
251                 break;
252         case SNDRV_PCM_TRIGGER_STOP:
253         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
254                 deactivate_substream(dev, sub);
255                 break;
256         default:
257                 return -EINVAL;
258         }
259
260         return 0;
261 }
262
263 static snd_pcm_uframes_t
264 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
265 {
266         int index = sub->number;
267         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
268
269         if (dev->input_panic || dev->output_panic)
270                 return SNDRV_PCM_POS_XRUN;
271
272         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
273                 return bytes_to_frames(sub->runtime, 
274                                         dev->audio_out_buf_pos[index]);
275         else
276                 return bytes_to_frames(sub->runtime,
277                                         dev->audio_in_buf_pos[index]);
278 }
279
280 /* operators for both playback and capture */
281 static struct snd_pcm_ops snd_usb_caiaq_ops = {
282         .open =         snd_usb_caiaq_substream_open,
283         .close =        snd_usb_caiaq_substream_close,
284         .ioctl =        snd_pcm_lib_ioctl,
285         .hw_params =    snd_usb_caiaq_pcm_hw_params,
286         .hw_free =      snd_usb_caiaq_pcm_hw_free,
287         .prepare =      snd_usb_caiaq_pcm_prepare,
288         .trigger =      snd_usb_caiaq_pcm_trigger,
289         .pointer =      snd_usb_caiaq_pcm_pointer
290 };
291         
292 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
293                                       struct snd_pcm_substream **subs)
294 {
295         int stream, pb, *cnt;
296         struct snd_pcm_substream *sub;
297
298         for (stream = 0; stream < dev->n_streams; stream++) {
299                 sub = subs[stream];
300                 if (!sub)
301                         continue;
302
303                 pb = frames_to_bytes(sub->runtime, 
304                                      sub->runtime->period_size);
305                 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
306                                         &dev->period_out_count[stream] :
307                                         &dev->period_in_count[stream];
308
309                 if (*cnt >= pb) {
310                         snd_pcm_period_elapsed(sub);
311                         *cnt %= pb;
312                 }
313         }
314 }
315
316 static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
317                               const struct urb *urb,
318                               const struct usb_iso_packet_descriptor *iso)
319 {
320         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
321         struct snd_pcm_substream *sub;
322         int stream, i;
323
324         if (all_substreams_zero(dev->sub_capture))
325                 return;
326
327         for (i = 0; i < iso->actual_length;) {
328                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
329                         sub = dev->sub_capture[stream];
330                         if (sub) {
331                                 struct snd_pcm_runtime *rt = sub->runtime;
332                                 char *audio_buf = rt->dma_area;
333                                 int sz = frames_to_bytes(rt, rt->buffer_size);
334                                 audio_buf[dev->audio_in_buf_pos[stream]++] 
335                                         = usb_buf[i];
336                                 dev->period_in_count[stream]++;
337                                 if (dev->audio_in_buf_pos[stream] == sz)
338                                         dev->audio_in_buf_pos[stream] = 0;
339                         }
340                 }
341         }
342 }
343
344 static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
345                               const struct urb *urb,
346                               const struct usb_iso_packet_descriptor *iso)
347 {
348         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
349         unsigned char check_byte;
350         struct snd_pcm_substream *sub;
351         int stream, i;
352
353         for (i = 0; i < iso->actual_length;) {
354                 if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
355                         for (stream = 0; 
356                              stream < dev->n_streams; 
357                              stream++, i++) {
358                                 if (dev->first_packet)
359                                         continue;
360
361                                 check_byte = MAKE_CHECKBYTE(dev, stream, i);
362                                 
363                                 if ((usb_buf[i] & 0x3f) != check_byte)
364                                         dev->input_panic = 1;
365
366                                 if (usb_buf[i] & 0x80)
367                                         dev->output_panic = 1;
368                         }
369                 }
370                 dev->first_packet = 0;
371
372                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
373                         sub = dev->sub_capture[stream];
374                         if (dev->input_panic)
375                                 usb_buf[i] = 0;
376
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
391 static void read_in_urb(struct snd_usb_caiaqdev *dev,
392                         const struct urb *urb,
393                         const struct usb_iso_packet_descriptor *iso)
394 {
395         if (!dev->streaming)
396                 return;
397
398         if (iso->actual_length < dev->bpp)
399                 return;
400
401         switch (dev->spec.data_alignment) {
402         case 0:
403                 read_in_urb_mode0(dev, urb, iso);
404                 break;
405         case 2:
406                 read_in_urb_mode2(dev, urb, iso);
407                 break;
408         }
409
410         if ((dev->input_panic || dev->output_panic) && !dev->warned) {
411                 debug("streaming error detected %s %s\n", 
412                                 dev->input_panic ? "(input)" : "",
413                                 dev->output_panic ? "(output)" : "");
414                 dev->warned = 1;
415         }
416 }
417
418 static void fill_out_urb(struct snd_usb_caiaqdev *dev, 
419                          struct urb *urb, 
420                          const struct usb_iso_packet_descriptor *iso)
421 {
422         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
423         struct snd_pcm_substream *sub;
424         int stream, i;
425         
426         for (i = 0; i < iso->length;) {
427                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
428                         sub = dev->sub_playback[stream];
429                         if (sub) {
430                                 struct snd_pcm_runtime *rt = sub->runtime;
431                                 char *audio_buf = rt->dma_area;
432                                 int sz = frames_to_bytes(rt, rt->buffer_size);
433                                 usb_buf[i] =
434                                         audio_buf[dev->audio_out_buf_pos[stream]];
435                                 dev->period_out_count[stream]++;
436                                 dev->audio_out_buf_pos[stream]++;
437                                 if (dev->audio_out_buf_pos[stream] == sz)
438                                         dev->audio_out_buf_pos[stream] = 0;
439                         } else
440                                 usb_buf[i] = 0;
441                 }
442
443                 /* fill in the check bytes */
444                 if (dev->spec.data_alignment == 2 &&
445                     i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 
446                         (dev->n_streams * CHANNELS_PER_STREAM))
447                     for (stream = 0; stream < dev->n_streams; stream++, i++)
448                         usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
449         }
450 }
451
452 static void read_completed(struct urb *urb)
453 {
454         struct snd_usb_caiaq_cb_info *info = urb->context; 
455         struct snd_usb_caiaqdev *dev;
456         struct urb *out;
457         int frame, len, send_it = 0, outframe = 0;
458
459         if (urb->status || !info)
460                 return;
461
462         dev = info->dev;
463
464         if (!dev->streaming)
465                 return;
466
467         out = dev->data_urbs_out[info->index];
468
469         /* read the recently received packet and send back one which has
470          * the same layout */
471         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
472                 if (urb->iso_frame_desc[frame].status)
473                         continue;
474
475                 len = urb->iso_frame_desc[outframe].actual_length;
476                 out->iso_frame_desc[outframe].length = len;
477                 out->iso_frame_desc[outframe].actual_length = 0;
478                 out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame;
479                 
480                 if (len > 0) {
481                         spin_lock(&dev->spinlock);
482                         fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
483                         read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
484                         spin_unlock(&dev->spinlock);
485                         check_for_elapsed_periods(dev, dev->sub_playback);
486                         check_for_elapsed_periods(dev, dev->sub_capture);
487                         send_it = 1;
488                 }
489
490                 outframe++;
491         }
492
493         if (send_it) {
494                 out->number_of_packets = FRAMES_PER_URB;
495                 out->transfer_flags = URB_ISO_ASAP;
496                 usb_submit_urb(out, GFP_ATOMIC);
497         }
498         
499         /* re-submit inbound urb */
500         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
501                 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
502                 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
503                 urb->iso_frame_desc[frame].actual_length = 0;
504         }
505         
506         urb->number_of_packets = FRAMES_PER_URB;
507         urb->transfer_flags = URB_ISO_ASAP;
508         usb_submit_urb(urb, GFP_ATOMIC);
509 }
510
511 static void write_completed(struct urb *urb)
512 {
513         struct snd_usb_caiaq_cb_info *info = urb->context;
514         struct snd_usb_caiaqdev *dev = info->dev;
515
516         if (!dev->output_running) {
517                 dev->output_running = 1;
518                 wake_up(&dev->prepare_wait_queue);
519         }
520 }
521
522 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
523 {
524         int i, frame;
525         struct urb **urbs;
526         struct usb_device *usb_dev = dev->chip.dev;
527         unsigned int pipe;
528
529         pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ? 
530                 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
531                 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
532
533         urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
534         if (!urbs) {
535                 log("unable to kmalloc() urbs, OOM!?\n");
536                 *ret = -ENOMEM;
537                 return NULL;
538         }
539
540         for (i = 0; i < N_URBS; i++) {
541                 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
542                 if (!urbs[i]) {
543                         log("unable to usb_alloc_urb(), OOM!?\n");
544                         *ret = -ENOMEM;
545                         return urbs;
546                 }
547
548                 urbs[i]->transfer_buffer = 
549                         kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
550                 if (!urbs[i]->transfer_buffer) {
551                         log("unable to kmalloc() transfer buffer, OOM!?\n");
552                         *ret = -ENOMEM;
553                         return urbs;
554                 }
555                 
556                 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
557                         struct usb_iso_packet_descriptor *iso = 
558                                 &urbs[i]->iso_frame_desc[frame];
559                         
560                         iso->offset = BYTES_PER_FRAME * frame;
561                         iso->length = BYTES_PER_FRAME;
562                 }
563                 
564                 urbs[i]->dev = usb_dev;
565                 urbs[i]->pipe = pipe;
566                 urbs[i]->transfer_buffer_length = FRAMES_PER_URB 
567                                                 * BYTES_PER_FRAME;
568                 urbs[i]->context = &dev->data_cb_info[i];
569                 urbs[i]->interval = 1;
570                 urbs[i]->transfer_flags = URB_ISO_ASAP;
571                 urbs[i]->number_of_packets = FRAMES_PER_URB;
572                 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
573                                         read_completed : write_completed;
574         }
575
576         *ret = 0;
577         return urbs;
578 }
579
580 static void free_urbs(struct urb **urbs)
581 {
582         int i;
583
584         if (!urbs)
585                 return;
586
587         for (i = 0; i < N_URBS; i++) {
588                 if (!urbs[i])
589                         continue;
590                 
591                 usb_kill_urb(urbs[i]);
592                 kfree(urbs[i]->transfer_buffer);
593                 usb_free_urb(urbs[i]);
594         }
595
596         kfree(urbs);
597 }
598
599 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
600 {
601         int i, ret;
602
603         dev->n_audio_in  = max(dev->spec.num_analog_audio_in, 
604                                dev->spec.num_digital_audio_in) / 
605                                 CHANNELS_PER_STREAM;
606         dev->n_audio_out = max(dev->spec.num_analog_audio_out,
607                                dev->spec.num_digital_audio_out) / 
608                                 CHANNELS_PER_STREAM;
609         dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
610
611         debug("dev->n_audio_in = %d\n", dev->n_audio_in);
612         debug("dev->n_audio_out = %d\n", dev->n_audio_out);
613         debug("dev->n_streams = %d\n", dev->n_streams);
614
615         if (dev->n_streams > MAX_STREAMS) {
616                 log("unable to initialize device, too many streams.\n");
617                 return -EINVAL;
618         }
619
620         ret = snd_pcm_new(dev->chip.card, dev->product_name, 0, 
621                         dev->n_audio_out, dev->n_audio_in, &dev->pcm);
622
623         if (ret < 0) {
624                 log("snd_pcm_new() returned %d\n", ret);
625                 return ret;
626         }
627
628         dev->pcm->private_data = dev;
629         strcpy(dev->pcm->name, dev->product_name);
630
631         memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
632         memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
633         
634         memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
635                         sizeof(snd_usb_caiaq_pcm_hardware));
636
637         /* setup samplerates */
638         dev->samplerates = dev->pcm_info.rates;
639         switch (dev->chip.usb_id) {
640         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
641         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
642         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
643         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
644                 dev->samplerates |= SNDRV_PCM_RATE_192000;
645                 /* fall thru */
646         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
647         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
648                 dev->samplerates |= SNDRV_PCM_RATE_88200;
649                 break;
650         }
651
652         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 
653                                 &snd_usb_caiaq_ops);
654         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 
655                                 &snd_usb_caiaq_ops);
656
657         snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
658                                         SNDRV_DMA_TYPE_CONTINUOUS,
659                                         snd_dma_continuous_data(GFP_KERNEL),
660                                         MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
661
662         dev->data_cb_info =
663                 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS, 
664                                         GFP_KERNEL);
665
666         if (!dev->data_cb_info)
667                 return -ENOMEM;
668
669         for (i = 0; i < N_URBS; i++) {
670                 dev->data_cb_info[i].dev = dev;
671                 dev->data_cb_info[i].index = i;
672         }
673         
674         dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
675         if (ret < 0) {
676                 kfree(dev->data_cb_info);
677                 free_urbs(dev->data_urbs_in);
678                 return ret;
679         }
680         
681         dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
682         if (ret < 0) {
683                 kfree(dev->data_cb_info);
684                 free_urbs(dev->data_urbs_in);
685                 free_urbs(dev->data_urbs_out);
686                 return ret;
687         }
688
689         return 0;
690 }
691
692 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
693 {
694         debug("%s(%p)\n", __func__, dev);
695         stream_stop(dev);
696         free_urbs(dev->data_urbs_in);
697         free_urbs(dev->data_urbs_out);
698         kfree(dev->data_cb_info);
699 }
700