[ALSA] Add Native Instrument usb audio device support
[linux-2.6.git] / 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++) {
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->audio_out_buf_pos[stream]++;
448                                 if (dev->audio_out_buf_pos[stream] == sz)
449                                         dev->audio_out_buf_pos[stream] = 0;
450                         } else
451                                 usb_buf[i++] = 0;
452
453                 /* fill in the check bytes */
454                 if (dev->spec.data_alignment == 2 &&
455                     i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 
456                         (dev->n_streams * CHANNELS_PER_STREAM))
457                     for (stream = 0; stream < dev->n_streams; stream++, i++)
458                         usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
459                 }
460         }
461
462         spin_unlock(&dev->spinlock);
463         check_for_elapsed_periods(dev, dev->sub_playback);
464 }
465
466 static void read_completed(struct urb *urb)
467 {
468         struct snd_usb_caiaq_cb_info *info = urb->context; 
469         struct snd_usb_caiaqdev *dev;
470         struct urb *out;
471         int frame, len, send_it = 0, outframe = 0;
472
473         if (urb->status || !info)
474                 return;
475
476         dev = info->dev;
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                         fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
495                         read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
496                         send_it = 1;
497                 }
498
499                 outframe++;
500         }
501
502         if (send_it) {
503                 out->number_of_packets = FRAMES_PER_URB;
504                 out->transfer_flags = URB_ISO_ASAP;
505                 usb_submit_urb(out, GFP_ATOMIC);
506         }
507         
508         /* re-submit inbound urb */
509         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
510                 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
511                 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
512                 urb->iso_frame_desc[frame].actual_length = 0;
513         }
514         
515         urb->number_of_packets = FRAMES_PER_URB;
516         urb->transfer_flags = URB_ISO_ASAP;
517         usb_submit_urb(urb, GFP_ATOMIC);
518 }
519
520 static void write_completed(struct urb *urb)
521 {
522         struct snd_usb_caiaq_cb_info *info = urb->context;
523         struct snd_usb_caiaqdev *dev = info->dev;
524
525         if (!dev->output_running) {
526                 dev->output_running = 1;
527                 wake_up(&dev->prepare_wait_queue);
528         }
529 }
530
531 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
532 {
533         int i, frame;
534         struct urb **urbs;
535         struct usb_device *usb_dev = dev->chip.dev;
536         unsigned int pipe;
537
538         pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ? 
539                 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
540                 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
541
542         urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
543         if (!urbs) {
544                 log("unable to kmalloc() urbs, OOM!?\n");
545                 *ret = -ENOMEM;
546                 return NULL;
547         }
548
549         for (i = 0; i < N_URBS; i++) {
550                 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
551                 if (!urbs[i]) {
552                         log("unable to usb_alloc_urb(), OOM!?\n");
553                         *ret = -ENOMEM;
554                         return urbs;
555                 }
556
557                 urbs[i]->transfer_buffer = 
558                         kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
559                 if (!urbs[i]->transfer_buffer) {
560                         log("unable to kmalloc() transfer buffer, OOM!?\n");
561                         *ret = -ENOMEM;
562                         return urbs;
563                 }
564                 
565                 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
566                         struct usb_iso_packet_descriptor *iso = 
567                                 &urbs[i]->iso_frame_desc[frame];
568                         
569                         iso->offset = BYTES_PER_FRAME * frame;
570                         iso->length = BYTES_PER_FRAME;
571                 }
572                 
573                 urbs[i]->dev = usb_dev;
574                 urbs[i]->pipe = pipe;
575                 urbs[i]->transfer_buffer_length = FRAMES_PER_URB 
576                                                 * BYTES_PER_FRAME;
577                 urbs[i]->context = &dev->data_cb_info[i];
578                 urbs[i]->interval = 1;
579                 urbs[i]->transfer_flags = URB_ISO_ASAP;
580                 urbs[i]->number_of_packets = FRAMES_PER_URB;
581                 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
582                                         read_completed : write_completed;
583         }
584
585         *ret = 0;
586         return urbs;
587 }
588
589 static void free_urbs(struct urb **urbs)
590 {
591         int i;
592
593         if (!urbs)
594                 return;
595
596         for (i = 0; i < N_URBS; i++) {
597                 if (!urbs[i])
598                         continue;
599                 
600                 usb_kill_urb(urbs[i]);
601                 kfree(urbs[i]->transfer_buffer);
602                 usb_free_urb(urbs[i]);
603         }
604
605         kfree(urbs);
606 }
607
608 int __devinit snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
609 {
610         int i, ret;
611
612         dev->n_audio_in  = max(dev->spec.num_analog_audio_in, 
613                                dev->spec.num_digital_audio_in) / 
614                                 CHANNELS_PER_STREAM;
615         dev->n_audio_out = max(dev->spec.num_analog_audio_out,
616                                dev->spec.num_digital_audio_out) / 
617                                 CHANNELS_PER_STREAM;
618         dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
619
620         debug("dev->n_audio_in = %d\n", dev->n_audio_in);
621         debug("dev->n_audio_out = %d\n", dev->n_audio_out);
622         debug("dev->n_streams = %d\n", dev->n_streams);
623
624         if (dev->n_streams > MAX_STREAMS) {
625                 log("unable to initialize device, too many streams.\n");
626                 return -EINVAL;
627         }
628
629         ret = snd_pcm_new(dev->chip.card, dev->product_name, 0, 
630                         dev->n_audio_out, dev->n_audio_in, &dev->pcm);
631
632         if (ret < 0) {
633                 log("snd_pcm_new() returned %d\n", ret);
634                 return ret;
635         }
636
637         dev->pcm->private_data = dev;
638         strcpy(dev->pcm->name, dev->product_name);
639
640         memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
641         memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
642         
643         memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
644                         sizeof(snd_usb_caiaq_pcm_hardware));
645
646         /* setup samplerates */
647         dev->samplerates = dev->pcm_info.rates;
648         switch (dev->chip.usb_id) {
649         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
650                 dev->samplerates |= SNDRV_PCM_RATE_88200;
651                 dev->samplerates |= SNDRV_PCM_RATE_192000;
652                 break;
653         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
654                 dev->samplerates |= SNDRV_PCM_RATE_88200;
655                 break;
656         }
657
658         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 
659                                 &snd_usb_caiaq_ops);
660         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 
661                                 &snd_usb_caiaq_ops);
662
663         snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
664                                         SNDRV_DMA_TYPE_CONTINUOUS,
665                                         snd_dma_continuous_data(GFP_KERNEL),
666                                         MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
667
668         dev->data_cb_info =
669                 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS, 
670                                         GFP_KERNEL);
671
672         if (!dev->data_cb_info)
673                 return -ENOMEM;
674
675         for (i = 0; i < N_URBS; i++) {
676                 dev->data_cb_info[i].dev = dev;
677                 dev->data_cb_info[i].index = i;
678         }
679         
680         dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
681         if (ret < 0) {
682                 kfree(dev->data_cb_info);
683                 free_urbs(dev->data_urbs_in);
684                 return ret;
685         }
686         
687         dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
688         if (ret < 0) {
689                 kfree(dev->data_cb_info);
690                 free_urbs(dev->data_urbs_in);
691                 free_urbs(dev->data_urbs_out);
692                 return ret;
693         }
694
695         return 0;
696 }
697
698 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
699 {
700         debug("snd_usb_caiaq_audio_free (%p)\n", dev);
701         stream_stop(dev);
702         free_urbs(dev->data_urbs_in);
703         free_urbs(dev->data_urbs_out);
704         kfree(dev->data_cb_info);
705 }
706