121af0644fd9bc901fbbc62cb676738e9049e0c7
[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->period_out_count[index] = BYTES_PER_SAMPLE + 1;
200                 dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
201         } else {
202                 int in_pos = (dev->spec.data_alignment == 2) ? 0 : 2;
203                 dev->period_in_count[index] = BYTES_PER_SAMPLE + in_pos;
204                 dev->audio_in_buf_pos[index] = BYTES_PER_SAMPLE + in_pos;
205         }
206
207         if (dev->streaming)
208                 return 0;
209
210         /* the first client that opens a stream defines the sample rate
211          * setting for all subsequent calls, until the last client closed. */
212         for (i=0; i < ARRAY_SIZE(rates); i++)
213                 if (runtime->rate == rates[i])
214                         dev->pcm_info.rates = 1 << i;
215
216         snd_pcm_limit_hw_rates(runtime);
217
218         bytes_per_sample = BYTES_PER_SAMPLE;
219         if (dev->spec.data_alignment == 2)
220                 bytes_per_sample++;
221
222         bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
223                 * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
224
225         if (bpp > MAX_ENDPOINT_SIZE)
226                 bpp = MAX_ENDPOINT_SIZE;
227
228         ret = snd_usb_caiaq_set_audio_params(dev, runtime->rate,
229                                              runtime->sample_bits, bpp);
230         if (ret)
231                 return ret;
232
233         ret = stream_start(dev);
234         if (ret)
235                 return ret;
236
237         dev->output_running = 0;
238         wait_event_timeout(dev->prepare_wait_queue, dev->output_running, HZ);
239         if (!dev->output_running) {
240                 stream_stop(dev);
241                 return -EPIPE;
242         }
243
244         return 0;
245 }
246
247 static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
248 {
249         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
250
251         switch (cmd) {
252         case SNDRV_PCM_TRIGGER_START:
253         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
254                 activate_substream(dev, sub);
255                 break;
256         case SNDRV_PCM_TRIGGER_STOP:
257         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
258                 deactivate_substream(dev, sub);
259                 break;
260         default:
261                 return -EINVAL;
262         }
263
264         return 0;
265 }
266
267 static snd_pcm_uframes_t
268 snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
269 {
270         int index = sub->number;
271         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
272
273         if (dev->input_panic || dev->output_panic)
274                 return SNDRV_PCM_POS_XRUN;
275
276         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
277                 return bytes_to_frames(sub->runtime,
278                                         dev->audio_out_buf_pos[index]);
279         else
280                 return bytes_to_frames(sub->runtime,
281                                         dev->audio_in_buf_pos[index]);
282 }
283
284 /* operators for both playback and capture */
285 static struct snd_pcm_ops snd_usb_caiaq_ops = {
286         .open =         snd_usb_caiaq_substream_open,
287         .close =        snd_usb_caiaq_substream_close,
288         .ioctl =        snd_pcm_lib_ioctl,
289         .hw_params =    snd_usb_caiaq_pcm_hw_params,
290         .hw_free =      snd_usb_caiaq_pcm_hw_free,
291         .prepare =      snd_usb_caiaq_pcm_prepare,
292         .trigger =      snd_usb_caiaq_pcm_trigger,
293         .pointer =      snd_usb_caiaq_pcm_pointer
294 };
295
296 static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
297                                       struct snd_pcm_substream **subs)
298 {
299         int stream, pb, *cnt;
300         struct snd_pcm_substream *sub;
301
302         for (stream = 0; stream < dev->n_streams; stream++) {
303                 sub = subs[stream];
304                 if (!sub)
305                         continue;
306
307                 pb = snd_pcm_lib_period_bytes(sub);
308                 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
309                                         &dev->period_out_count[stream] :
310                                         &dev->period_in_count[stream];
311
312                 if (*cnt >= pb) {
313                         snd_pcm_period_elapsed(sub);
314                         *cnt %= pb;
315                 }
316         }
317 }
318
319 static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
320                               const struct urb *urb,
321                               const struct usb_iso_packet_descriptor *iso)
322 {
323         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
324         struct snd_pcm_substream *sub;
325         int stream, i;
326
327         if (all_substreams_zero(dev->sub_capture))
328                 return;
329
330         for (i = 0; i < iso->actual_length;) {
331                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
332                         sub = dev->sub_capture[stream];
333                         if (sub) {
334                                 struct snd_pcm_runtime *rt = sub->runtime;
335                                 char *audio_buf = rt->dma_area;
336                                 int sz = frames_to_bytes(rt, rt->buffer_size);
337                                 audio_buf[dev->audio_in_buf_pos[stream]++]
338                                         = usb_buf[i];
339                                 dev->period_in_count[stream]++;
340                                 if (dev->audio_in_buf_pos[stream] == sz)
341                                         dev->audio_in_buf_pos[stream] = 0;
342                         }
343                 }
344         }
345 }
346
347 static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
348                               const struct urb *urb,
349                               const struct usb_iso_packet_descriptor *iso)
350 {
351         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
352         unsigned char check_byte;
353         struct snd_pcm_substream *sub;
354         int stream, i;
355
356         for (i = 0; i < iso->actual_length;) {
357                 if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
358                         for (stream = 0;
359                              stream < dev->n_streams;
360                              stream++, i++) {
361                                 if (dev->first_packet)
362                                         continue;
363
364                                 check_byte = MAKE_CHECKBYTE(dev, stream, i);
365
366                                 if ((usb_buf[i] & 0x3f) != check_byte)
367                                         dev->input_panic = 1;
368
369                                 if (usb_buf[i] & 0x80)
370                                         dev->output_panic = 1;
371                         }
372                 }
373                 dev->first_packet = 0;
374
375                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
376                         sub = dev->sub_capture[stream];
377                         if (dev->input_panic)
378                                 usb_buf[i] = 0;
379
380                         if (sub) {
381                                 struct snd_pcm_runtime *rt = sub->runtime;
382                                 char *audio_buf = rt->dma_area;
383                                 int sz = frames_to_bytes(rt, rt->buffer_size);
384                                 audio_buf[dev->audio_in_buf_pos[stream]++] =
385                                         usb_buf[i];
386                                 dev->period_in_count[stream]++;
387                                 if (dev->audio_in_buf_pos[stream] == sz)
388                                         dev->audio_in_buf_pos[stream] = 0;
389                         }
390                 }
391         }
392 }
393
394 static void read_in_urb(struct snd_usb_caiaqdev *dev,
395                         const struct urb *urb,
396                         const struct usb_iso_packet_descriptor *iso)
397 {
398         if (!dev->streaming)
399                 return;
400
401         if (iso->actual_length < dev->bpp)
402                 return;
403
404         switch (dev->spec.data_alignment) {
405         case 0:
406                 read_in_urb_mode0(dev, urb, iso);
407                 break;
408         case 2:
409                 read_in_urb_mode2(dev, urb, iso);
410                 break;
411         }
412
413         if ((dev->input_panic || dev->output_panic) && !dev->warned) {
414                 debug("streaming error detected %s %s\n",
415                                 dev->input_panic ? "(input)" : "",
416                                 dev->output_panic ? "(output)" : "");
417                 dev->warned = 1;
418         }
419 }
420
421 static void fill_out_urb(struct snd_usb_caiaqdev *dev,
422                          struct urb *urb,
423                          const struct usb_iso_packet_descriptor *iso)
424 {
425         unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
426         struct snd_pcm_substream *sub;
427         int stream, i;
428
429         for (i = 0; i < iso->length;) {
430                 for (stream = 0; stream < dev->n_streams; stream++, i++) {
431                         sub = dev->sub_playback[stream];
432                         if (sub) {
433                                 struct snd_pcm_runtime *rt = sub->runtime;
434                                 char *audio_buf = rt->dma_area;
435                                 int sz = frames_to_bytes(rt, rt->buffer_size);
436                                 usb_buf[i] =
437                                         audio_buf[dev->audio_out_buf_pos[stream]];
438                                 dev->period_out_count[stream]++;
439                                 dev->audio_out_buf_pos[stream]++;
440                                 if (dev->audio_out_buf_pos[stream] == sz)
441                                         dev->audio_out_buf_pos[stream] = 0;
442                         } else
443                                 usb_buf[i] = 0;
444                 }
445
446                 /* fill in the check bytes */
447                 if (dev->spec.data_alignment == 2 &&
448                     i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
449                         (dev->n_streams * CHANNELS_PER_STREAM))
450                     for (stream = 0; stream < dev->n_streams; stream++, i++)
451                         usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
452         }
453 }
454
455 static void read_completed(struct urb *urb)
456 {
457         struct snd_usb_caiaq_cb_info *info = urb->context;
458         struct snd_usb_caiaqdev *dev;
459         struct urb *out;
460         int frame, len, send_it = 0, outframe = 0;
461
462         if (urb->status || !info)
463                 return;
464
465         dev = info->dev;
466
467         if (!dev->streaming)
468                 return;
469
470         out = dev->data_urbs_out[info->index];
471
472         /* read the recently received packet and send back one which has
473          * the same layout */
474         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
475                 if (urb->iso_frame_desc[frame].status)
476                         continue;
477
478                 len = urb->iso_frame_desc[outframe].actual_length;
479                 out->iso_frame_desc[outframe].length = len;
480                 out->iso_frame_desc[outframe].actual_length = 0;
481                 out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame;
482
483                 if (len > 0) {
484                         spin_lock(&dev->spinlock);
485                         fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
486                         read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
487                         spin_unlock(&dev->spinlock);
488                         check_for_elapsed_periods(dev, dev->sub_playback);
489                         check_for_elapsed_periods(dev, dev->sub_capture);
490                         send_it = 1;
491                 }
492
493                 outframe++;
494         }
495
496         if (send_it) {
497                 out->number_of_packets = FRAMES_PER_URB;
498                 out->transfer_flags = URB_ISO_ASAP;
499                 usb_submit_urb(out, GFP_ATOMIC);
500         }
501
502         /* re-submit inbound urb */
503         for (frame = 0; frame < FRAMES_PER_URB; frame++) {
504                 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
505                 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
506                 urb->iso_frame_desc[frame].actual_length = 0;
507         }
508
509         urb->number_of_packets = FRAMES_PER_URB;
510         urb->transfer_flags = URB_ISO_ASAP;
511         usb_submit_urb(urb, GFP_ATOMIC);
512 }
513
514 static void write_completed(struct urb *urb)
515 {
516         struct snd_usb_caiaq_cb_info *info = urb->context;
517         struct snd_usb_caiaqdev *dev = info->dev;
518
519         if (!dev->output_running) {
520                 dev->output_running = 1;
521                 wake_up(&dev->prepare_wait_queue);
522         }
523 }
524
525 static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
526 {
527         int i, frame;
528         struct urb **urbs;
529         struct usb_device *usb_dev = dev->chip.dev;
530         unsigned int pipe;
531
532         pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
533                 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
534                 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
535
536         urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
537         if (!urbs) {
538                 log("unable to kmalloc() urbs, OOM!?\n");
539                 *ret = -ENOMEM;
540                 return NULL;
541         }
542
543         for (i = 0; i < N_URBS; i++) {
544                 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
545                 if (!urbs[i]) {
546                         log("unable to usb_alloc_urb(), OOM!?\n");
547                         *ret = -ENOMEM;
548                         return urbs;
549                 }
550
551                 urbs[i]->transfer_buffer =
552                         kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
553                 if (!urbs[i]->transfer_buffer) {
554                         log("unable to kmalloc() transfer buffer, OOM!?\n");
555                         *ret = -ENOMEM;
556                         return urbs;
557                 }
558
559                 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
560                         struct usb_iso_packet_descriptor *iso =
561                                 &urbs[i]->iso_frame_desc[frame];
562
563                         iso->offset = BYTES_PER_FRAME * frame;
564                         iso->length = BYTES_PER_FRAME;
565                 }
566
567                 urbs[i]->dev = usb_dev;
568                 urbs[i]->pipe = pipe;
569                 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
570                                                 * BYTES_PER_FRAME;
571                 urbs[i]->context = &dev->data_cb_info[i];
572                 urbs[i]->interval = 1;
573                 urbs[i]->transfer_flags = URB_ISO_ASAP;
574                 urbs[i]->number_of_packets = FRAMES_PER_URB;
575                 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
576                                         read_completed : write_completed;
577         }
578
579         *ret = 0;
580         return urbs;
581 }
582
583 static void free_urbs(struct urb **urbs)
584 {
585         int i;
586
587         if (!urbs)
588                 return;
589
590         for (i = 0; i < N_URBS; i++) {
591                 if (!urbs[i])
592                         continue;
593
594                 usb_kill_urb(urbs[i]);
595                 kfree(urbs[i]->transfer_buffer);
596                 usb_free_urb(urbs[i]);
597         }
598
599         kfree(urbs);
600 }
601
602 int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
603 {
604         int i, ret;
605
606         dev->n_audio_in  = max(dev->spec.num_analog_audio_in,
607                                dev->spec.num_digital_audio_in) /
608                                 CHANNELS_PER_STREAM;
609         dev->n_audio_out = max(dev->spec.num_analog_audio_out,
610                                dev->spec.num_digital_audio_out) /
611                                 CHANNELS_PER_STREAM;
612         dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
613
614         debug("dev->n_audio_in = %d\n", dev->n_audio_in);
615         debug("dev->n_audio_out = %d\n", dev->n_audio_out);
616         debug("dev->n_streams = %d\n", dev->n_streams);
617
618         if (dev->n_streams > MAX_STREAMS) {
619                 log("unable to initialize device, too many streams.\n");
620                 return -EINVAL;
621         }
622
623         ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
624                         dev->n_audio_out, dev->n_audio_in, &dev->pcm);
625
626         if (ret < 0) {
627                 log("snd_pcm_new() returned %d\n", ret);
628                 return ret;
629         }
630
631         dev->pcm->private_data = dev;
632         strcpy(dev->pcm->name, dev->product_name);
633
634         memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
635         memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
636
637         memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
638                         sizeof(snd_usb_caiaq_pcm_hardware));
639
640         /* setup samplerates */
641         dev->samplerates = dev->pcm_info.rates;
642         switch (dev->chip.usb_id) {
643         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
644         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
645         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
646         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
647                 dev->samplerates |= SNDRV_PCM_RATE_192000;
648                 /* fall thru */
649         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
650         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
651         case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
652                 dev->samplerates |= SNDRV_PCM_RATE_88200;
653                 break;
654         }
655
656         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
657                                 &snd_usb_caiaq_ops);
658         snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
659                                 &snd_usb_caiaq_ops);
660
661         snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
662                                         SNDRV_DMA_TYPE_CONTINUOUS,
663                                         snd_dma_continuous_data(GFP_KERNEL),
664                                         MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
665
666         dev->data_cb_info =
667                 kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
668                                         GFP_KERNEL);
669
670         if (!dev->data_cb_info)
671                 return -ENOMEM;
672
673         for (i = 0; i < N_URBS; i++) {
674                 dev->data_cb_info[i].dev = dev;
675                 dev->data_cb_info[i].index = i;
676         }
677
678         dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
679         if (ret < 0) {
680                 kfree(dev->data_cb_info);
681                 free_urbs(dev->data_urbs_in);
682                 return ret;
683         }
684
685         dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
686         if (ret < 0) {
687                 kfree(dev->data_cb_info);
688                 free_urbs(dev->data_urbs_in);
689                 free_urbs(dev->data_urbs_out);
690                 return ret;
691         }
692
693         return 0;
694 }
695
696 void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
697 {
698         debug("%s(%p)\n", __func__, dev);
699         stream_stop(dev);
700         free_urbs(dev->data_urbs_in);
701         free_urbs(dev->data_urbs_out);
702         kfree(dev->data_cb_info);
703 }
704