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6#include <linux/device.h>
7#include <linux/spinlock.h>
8#include <linux/slab.h>
9#include <linux/init.h>
10#include <linux/usb.h>
11#include <sound/core.h>
12#include <sound/pcm.h>
13
14#include "device.h"
15#include "audio.h"
16
17#define N_URBS 32
18#define CLOCK_DRIFT_TOLERANCE 5
19#define FRAMES_PER_URB 8
20#define BYTES_PER_FRAME 512
21#define CHANNELS_PER_STREAM 2
22#define BYTES_PER_SAMPLE 3
23#define BYTES_PER_SAMPLE_USB 4
24#define MAX_BUFFER_SIZE (128*1024)
25#define MAX_ENDPOINT_SIZE 512
26
27#define ENDPOINT_CAPTURE 2
28#define ENDPOINT_PLAYBACK 6
29
30#define MAKE_CHECKBYTE(cdev,stream,i) \
31 (stream << 1) | (~(i / (cdev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
32
33static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
34 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
35 SNDRV_PCM_INFO_BLOCK_TRANSFER),
36 .formats = SNDRV_PCM_FMTBIT_S24_3BE,
37 .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
38 SNDRV_PCM_RATE_96000),
39 .rate_min = 44100,
40 .rate_max = 0,
41 .channels_min = CHANNELS_PER_STREAM,
42 .channels_max = CHANNELS_PER_STREAM,
43 .buffer_bytes_max = MAX_BUFFER_SIZE,
44 .period_bytes_min = 128,
45 .period_bytes_max = MAX_BUFFER_SIZE,
46 .periods_min = 1,
47 .periods_max = 1024,
48};
49
50static void
51activate_substream(struct snd_usb_caiaqdev *cdev,
52 struct snd_pcm_substream *sub)
53{
54 spin_lock(&cdev->spinlock);
55
56 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
57 cdev->sub_playback[sub->number] = sub;
58 else
59 cdev->sub_capture[sub->number] = sub;
60
61 spin_unlock(&cdev->spinlock);
62}
63
64static void
65deactivate_substream(struct snd_usb_caiaqdev *cdev,
66 struct snd_pcm_substream *sub)
67{
68 unsigned long flags;
69 spin_lock_irqsave(&cdev->spinlock, flags);
70
71 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
72 cdev->sub_playback[sub->number] = NULL;
73 else
74 cdev->sub_capture[sub->number] = NULL;
75
76 spin_unlock_irqrestore(&cdev->spinlock, flags);
77}
78
79static int
80all_substreams_zero(struct snd_pcm_substream **subs)
81{
82 int i;
83 for (i = 0; i < MAX_STREAMS; i++)
84 if (subs[i] != NULL)
85 return 0;
86 return 1;
87}
88
89static int stream_start(struct snd_usb_caiaqdev *cdev)
90{
91 int i, ret;
92 struct device *dev = caiaqdev_to_dev(cdev);
93
94 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
95
96 if (cdev->streaming)
97 return -EINVAL;
98
99 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
100 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
101 cdev->input_panic = 0;
102 cdev->output_panic = 0;
103 cdev->first_packet = 4;
104 cdev->streaming = 1;
105 cdev->warned = 0;
106
107 for (i = 0; i < N_URBS; i++) {
108 ret = usb_submit_urb(cdev->data_urbs_in[i], GFP_ATOMIC);
109 if (ret) {
110 dev_err(dev, "unable to trigger read #%d! (ret %d)\n",
111 i, ret);
112 cdev->streaming = 0;
113 return -EPIPE;
114 }
115 }
116
117 return 0;
118}
119
120static void stream_stop(struct snd_usb_caiaqdev *cdev)
121{
122 int i;
123 struct device *dev = caiaqdev_to_dev(cdev);
124
125 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
126 if (!cdev->streaming)
127 return;
128
129 cdev->streaming = 0;
130
131 for (i = 0; i < N_URBS; i++) {
132 usb_kill_urb(cdev->data_urbs_in[i]);
133
134 if (test_bit(i, &cdev->outurb_active_mask))
135 usb_kill_urb(cdev->data_urbs_out[i]);
136 }
137
138 cdev->outurb_active_mask = 0;
139}
140
141static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
142{
143 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
144 struct device *dev = caiaqdev_to_dev(cdev);
145
146 dev_dbg(dev, "%s(%p)\n", __func__, substream);
147 substream->runtime->hw = cdev->pcm_info;
148 snd_pcm_limit_hw_rates(substream->runtime);
149
150 return 0;
151}
152
153static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
154{
155 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
156 struct device *dev = caiaqdev_to_dev(cdev);
157
158 dev_dbg(dev, "%s(%p)\n", __func__, substream);
159 if (all_substreams_zero(cdev->sub_playback) &&
160 all_substreams_zero(cdev->sub_capture)) {
161
162
163 stream_stop(cdev);
164 cdev->pcm_info.rates = cdev->samplerates;
165 }
166
167 return 0;
168}
169
170static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
171 struct snd_pcm_hw_params *hw_params)
172{
173 return snd_pcm_lib_alloc_vmalloc_buffer(sub,
174 params_buffer_bytes(hw_params));
175}
176
177static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
178{
179 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
180 deactivate_substream(cdev, sub);
181 return snd_pcm_lib_free_vmalloc_buffer(sub);
182}
183
184
185#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
186#error "Change this table"
187#endif
188
189static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
190 48000, 64000, 88200, 96000, 176400, 192000 };
191
192static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
193{
194 int bytes_per_sample, bpp, ret, i;
195 int index = substream->number;
196 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
197 struct snd_pcm_runtime *runtime = substream->runtime;
198 struct device *dev = caiaqdev_to_dev(cdev);
199
200 dev_dbg(dev, "%s(%p)\n", __func__, substream);
201
202 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
203 int out_pos;
204
205 switch (cdev->spec.data_alignment) {
206 case 0:
207 case 2:
208 out_pos = BYTES_PER_SAMPLE + 1;
209 break;
210 case 3:
211 default:
212 out_pos = 0;
213 break;
214 }
215
216 cdev->period_out_count[index] = out_pos;
217 cdev->audio_out_buf_pos[index] = out_pos;
218 } else {
219 int in_pos;
220
221 switch (cdev->spec.data_alignment) {
222 case 0:
223 in_pos = BYTES_PER_SAMPLE + 2;
224 break;
225 case 2:
226 in_pos = BYTES_PER_SAMPLE;
227 break;
228 case 3:
229 default:
230 in_pos = 0;
231 break;
232 }
233
234 cdev->period_in_count[index] = in_pos;
235 cdev->audio_in_buf_pos[index] = in_pos;
236 }
237
238 if (cdev->streaming)
239 return 0;
240
241
242
243 for (i=0; i < ARRAY_SIZE(rates); i++)
244 if (runtime->rate == rates[i])
245 cdev->pcm_info.rates = 1 << i;
246
247 snd_pcm_limit_hw_rates(runtime);
248
249 bytes_per_sample = BYTES_PER_SAMPLE;
250 if (cdev->spec.data_alignment >= 2)
251 bytes_per_sample++;
252
253 bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
254 * bytes_per_sample * CHANNELS_PER_STREAM * cdev->n_streams;
255
256 if (bpp > MAX_ENDPOINT_SIZE)
257 bpp = MAX_ENDPOINT_SIZE;
258
259 ret = snd_usb_caiaq_set_audio_params(cdev, runtime->rate,
260 runtime->sample_bits, bpp);
261 if (ret)
262 return ret;
263
264 ret = stream_start(cdev);
265 if (ret)
266 return ret;
267
268 cdev->output_running = 0;
269 wait_event_timeout(cdev->prepare_wait_queue, cdev->output_running, HZ);
270 if (!cdev->output_running) {
271 stream_stop(cdev);
272 return -EPIPE;
273 }
274
275 return 0;
276}
277
278static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
279{
280 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
281 struct device *dev = caiaqdev_to_dev(cdev);
282
283 dev_dbg(dev, "%s(%p) cmd %d\n", __func__, sub, cmd);
284
285 switch (cmd) {
286 case SNDRV_PCM_TRIGGER_START:
287 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
288 activate_substream(cdev, sub);
289 break;
290 case SNDRV_PCM_TRIGGER_STOP:
291 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
292 deactivate_substream(cdev, sub);
293 break;
294 default:
295 return -EINVAL;
296 }
297
298 return 0;
299}
300
301static snd_pcm_uframes_t
302snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
303{
304 int index = sub->number;
305 struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
306 snd_pcm_uframes_t ptr;
307
308 spin_lock(&cdev->spinlock);
309
310 if (cdev->input_panic || cdev->output_panic) {
311 ptr = SNDRV_PCM_POS_XRUN;
312 goto unlock;
313 }
314
315 if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
316 ptr = bytes_to_frames(sub->runtime,
317 cdev->audio_out_buf_pos[index]);
318 else
319 ptr = bytes_to_frames(sub->runtime,
320 cdev->audio_in_buf_pos[index]);
321
322unlock:
323 spin_unlock(&cdev->spinlock);
324 return ptr;
325}
326
327
328static const struct snd_pcm_ops snd_usb_caiaq_ops = {
329 .open = snd_usb_caiaq_substream_open,
330 .close = snd_usb_caiaq_substream_close,
331 .ioctl = snd_pcm_lib_ioctl,
332 .hw_params = snd_usb_caiaq_pcm_hw_params,
333 .hw_free = snd_usb_caiaq_pcm_hw_free,
334 .prepare = snd_usb_caiaq_pcm_prepare,
335 .trigger = snd_usb_caiaq_pcm_trigger,
336 .pointer = snd_usb_caiaq_pcm_pointer,
337 .page = snd_pcm_lib_get_vmalloc_page,
338};
339
340static void check_for_elapsed_periods(struct snd_usb_caiaqdev *cdev,
341 struct snd_pcm_substream **subs)
342{
343 int stream, pb, *cnt;
344 struct snd_pcm_substream *sub;
345
346 for (stream = 0; stream < cdev->n_streams; stream++) {
347 sub = subs[stream];
348 if (!sub)
349 continue;
350
351 pb = snd_pcm_lib_period_bytes(sub);
352 cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
353 &cdev->period_out_count[stream] :
354 &cdev->period_in_count[stream];
355
356 if (*cnt >= pb) {
357 snd_pcm_period_elapsed(sub);
358 *cnt %= pb;
359 }
360 }
361}
362
363static void read_in_urb_mode0(struct snd_usb_caiaqdev *cdev,
364 const struct urb *urb,
365 const struct usb_iso_packet_descriptor *iso)
366{
367 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
368 struct snd_pcm_substream *sub;
369 int stream, i;
370
371 if (all_substreams_zero(cdev->sub_capture))
372 return;
373
374 for (i = 0; i < iso->actual_length;) {
375 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
376 sub = cdev->sub_capture[stream];
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[cdev->audio_in_buf_pos[stream]++]
382 = usb_buf[i];
383 cdev->period_in_count[stream]++;
384 if (cdev->audio_in_buf_pos[stream] == sz)
385 cdev->audio_in_buf_pos[stream] = 0;
386 }
387 }
388 }
389}
390
391static void read_in_urb_mode2(struct snd_usb_caiaqdev *cdev,
392 const struct urb *urb,
393 const struct usb_iso_packet_descriptor *iso)
394{
395 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
396 unsigned char check_byte;
397 struct snd_pcm_substream *sub;
398 int stream, i;
399
400 for (i = 0; i < iso->actual_length;) {
401 if (i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
402 for (stream = 0;
403 stream < cdev->n_streams;
404 stream++, i++) {
405 if (cdev->first_packet)
406 continue;
407
408 check_byte = MAKE_CHECKBYTE(cdev, stream, i);
409
410 if ((usb_buf[i] & 0x3f) != check_byte)
411 cdev->input_panic = 1;
412
413 if (usb_buf[i] & 0x80)
414 cdev->output_panic = 1;
415 }
416 }
417 cdev->first_packet = 0;
418
419 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
420 sub = cdev->sub_capture[stream];
421 if (cdev->input_panic)
422 usb_buf[i] = 0;
423
424 if (sub) {
425 struct snd_pcm_runtime *rt = sub->runtime;
426 char *audio_buf = rt->dma_area;
427 int sz = frames_to_bytes(rt, rt->buffer_size);
428 audio_buf[cdev->audio_in_buf_pos[stream]++] =
429 usb_buf[i];
430 cdev->period_in_count[stream]++;
431 if (cdev->audio_in_buf_pos[stream] == sz)
432 cdev->audio_in_buf_pos[stream] = 0;
433 }
434 }
435 }
436}
437
438static void read_in_urb_mode3(struct snd_usb_caiaqdev *cdev,
439 const struct urb *urb,
440 const struct usb_iso_packet_descriptor *iso)
441{
442 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
443 struct device *dev = caiaqdev_to_dev(cdev);
444 int stream, i;
445
446
447 if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
448 return;
449
450 for (i = 0; i < iso->actual_length;) {
451 for (stream = 0; stream < cdev->n_streams; stream++) {
452 struct snd_pcm_substream *sub = cdev->sub_capture[stream];
453 char *audio_buf = NULL;
454 int c, n, sz = 0;
455
456 if (sub && !cdev->input_panic) {
457 struct snd_pcm_runtime *rt = sub->runtime;
458 audio_buf = rt->dma_area;
459 sz = frames_to_bytes(rt, rt->buffer_size);
460 }
461
462 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
463
464 if (audio_buf) {
465 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
466 audio_buf[cdev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
467
468 if (cdev->audio_in_buf_pos[stream] == sz)
469 cdev->audio_in_buf_pos[stream] = 0;
470 }
471
472 cdev->period_in_count[stream] += BYTES_PER_SAMPLE;
473 }
474
475 i += BYTES_PER_SAMPLE;
476
477 if (usb_buf[i] != ((stream << 1) | c) &&
478 !cdev->first_packet) {
479 if (!cdev->input_panic)
480 dev_warn(dev, " EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
481 ((stream << 1) | c), usb_buf[i], c, stream, i);
482 cdev->input_panic = 1;
483 }
484
485 i++;
486 }
487 }
488 }
489
490 if (cdev->first_packet > 0)
491 cdev->first_packet--;
492}
493
494static void read_in_urb(struct snd_usb_caiaqdev *cdev,
495 const struct urb *urb,
496 const struct usb_iso_packet_descriptor *iso)
497{
498 struct device *dev = caiaqdev_to_dev(cdev);
499
500 if (!cdev->streaming)
501 return;
502
503 if (iso->actual_length < cdev->bpp)
504 return;
505
506 switch (cdev->spec.data_alignment) {
507 case 0:
508 read_in_urb_mode0(cdev, urb, iso);
509 break;
510 case 2:
511 read_in_urb_mode2(cdev, urb, iso);
512 break;
513 case 3:
514 read_in_urb_mode3(cdev, urb, iso);
515 break;
516 }
517
518 if ((cdev->input_panic || cdev->output_panic) && !cdev->warned) {
519 dev_warn(dev, "streaming error detected %s %s\n",
520 cdev->input_panic ? "(input)" : "",
521 cdev->output_panic ? "(output)" : "");
522 cdev->warned = 1;
523 }
524}
525
526static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *cdev,
527 struct urb *urb,
528 const struct usb_iso_packet_descriptor *iso)
529{
530 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
531 struct snd_pcm_substream *sub;
532 int stream, i;
533
534 for (i = 0; i < iso->length;) {
535 for (stream = 0; stream < cdev->n_streams; stream++, i++) {
536 sub = cdev->sub_playback[stream];
537 if (sub) {
538 struct snd_pcm_runtime *rt = sub->runtime;
539 char *audio_buf = rt->dma_area;
540 int sz = frames_to_bytes(rt, rt->buffer_size);
541 usb_buf[i] =
542 audio_buf[cdev->audio_out_buf_pos[stream]];
543 cdev->period_out_count[stream]++;
544 cdev->audio_out_buf_pos[stream]++;
545 if (cdev->audio_out_buf_pos[stream] == sz)
546 cdev->audio_out_buf_pos[stream] = 0;
547 } else
548 usb_buf[i] = 0;
549 }
550
551
552 if (cdev->spec.data_alignment == 2 &&
553 i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) ==
554 (cdev->n_streams * CHANNELS_PER_STREAM))
555 for (stream = 0; stream < cdev->n_streams; stream++, i++)
556 usb_buf[i] = MAKE_CHECKBYTE(cdev, stream, i);
557 }
558}
559
560static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *cdev,
561 struct urb *urb,
562 const struct usb_iso_packet_descriptor *iso)
563{
564 unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
565 int stream, i;
566
567 for (i = 0; i < iso->length;) {
568 for (stream = 0; stream < cdev->n_streams; stream++) {
569 struct snd_pcm_substream *sub = cdev->sub_playback[stream];
570 char *audio_buf = NULL;
571 int c, n, sz = 0;
572
573 if (sub) {
574 struct snd_pcm_runtime *rt = sub->runtime;
575 audio_buf = rt->dma_area;
576 sz = frames_to_bytes(rt, rt->buffer_size);
577 }
578
579 for (c = 0; c < CHANNELS_PER_STREAM; c++) {
580 for (n = 0; n < BYTES_PER_SAMPLE; n++) {
581 if (audio_buf) {
582 usb_buf[i+n] = audio_buf[cdev->audio_out_buf_pos[stream]++];
583
584 if (cdev->audio_out_buf_pos[stream] == sz)
585 cdev->audio_out_buf_pos[stream] = 0;
586 } else {
587 usb_buf[i+n] = 0;
588 }
589 }
590
591 if (audio_buf)
592 cdev->period_out_count[stream] += BYTES_PER_SAMPLE;
593
594 i += BYTES_PER_SAMPLE;
595
596
597 usb_buf[i++] = (stream << 1) | c;
598 }
599 }
600 }
601}
602
603static inline void fill_out_urb(struct snd_usb_caiaqdev *cdev,
604 struct urb *urb,
605 const struct usb_iso_packet_descriptor *iso)
606{
607 switch (cdev->spec.data_alignment) {
608 case 0:
609 case 2:
610 fill_out_urb_mode_0(cdev, urb, iso);
611 break;
612 case 3:
613 fill_out_urb_mode_3(cdev, urb, iso);
614 break;
615 }
616}
617
618static void read_completed(struct urb *urb)
619{
620 struct snd_usb_caiaq_cb_info *info = urb->context;
621 struct snd_usb_caiaqdev *cdev;
622 struct device *dev;
623 struct urb *out = NULL;
624 int i, frame, len, send_it = 0, outframe = 0;
625 unsigned long flags;
626 size_t offset = 0;
627
628 if (urb->status || !info)
629 return;
630
631 cdev = info->cdev;
632 dev = caiaqdev_to_dev(cdev);
633
634 if (!cdev->streaming)
635 return;
636
637
638 for (i = 0; i < N_URBS; i++)
639 if (test_and_set_bit(i, &cdev->outurb_active_mask) == 0) {
640 out = cdev->data_urbs_out[i];
641 break;
642 }
643
644 if (!out) {
645 dev_err(dev, "Unable to find an output urb to use\n");
646 goto requeue;
647 }
648
649
650
651 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
652 if (urb->iso_frame_desc[frame].status)
653 continue;
654
655 len = urb->iso_frame_desc[outframe].actual_length;
656 out->iso_frame_desc[outframe].length = len;
657 out->iso_frame_desc[outframe].actual_length = 0;
658 out->iso_frame_desc[outframe].offset = offset;
659 offset += len;
660
661 if (len > 0) {
662 spin_lock_irqsave(&cdev->spinlock, flags);
663 fill_out_urb(cdev, out, &out->iso_frame_desc[outframe]);
664 read_in_urb(cdev, urb, &urb->iso_frame_desc[frame]);
665 spin_unlock_irqrestore(&cdev->spinlock, flags);
666 check_for_elapsed_periods(cdev, cdev->sub_playback);
667 check_for_elapsed_periods(cdev, cdev->sub_capture);
668 send_it = 1;
669 }
670
671 outframe++;
672 }
673
674 if (send_it) {
675 out->number_of_packets = outframe;
676 usb_submit_urb(out, GFP_ATOMIC);
677 } else {
678 struct snd_usb_caiaq_cb_info *oinfo = out->context;
679 clear_bit(oinfo->index, &cdev->outurb_active_mask);
680 }
681
682requeue:
683
684 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
685 urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
686 urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
687 urb->iso_frame_desc[frame].actual_length = 0;
688 }
689
690 urb->number_of_packets = FRAMES_PER_URB;
691 usb_submit_urb(urb, GFP_ATOMIC);
692}
693
694static void write_completed(struct urb *urb)
695{
696 struct snd_usb_caiaq_cb_info *info = urb->context;
697 struct snd_usb_caiaqdev *cdev = info->cdev;
698
699 if (!cdev->output_running) {
700 cdev->output_running = 1;
701 wake_up(&cdev->prepare_wait_queue);
702 }
703
704 clear_bit(info->index, &cdev->outurb_active_mask);
705}
706
707static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret)
708{
709 int i, frame;
710 struct urb **urbs;
711 struct usb_device *usb_dev = cdev->chip.dev;
712 unsigned int pipe;
713
714 pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
715 usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
716 usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
717
718 urbs = kmalloc_array(N_URBS, sizeof(*urbs), GFP_KERNEL);
719 if (!urbs) {
720 *ret = -ENOMEM;
721 return NULL;
722 }
723
724 for (i = 0; i < N_URBS; i++) {
725 urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
726 if (!urbs[i]) {
727 *ret = -ENOMEM;
728 return urbs;
729 }
730
731 urbs[i]->transfer_buffer =
732 kmalloc_array(BYTES_PER_FRAME, FRAMES_PER_URB,
733 GFP_KERNEL);
734 if (!urbs[i]->transfer_buffer) {
735 *ret = -ENOMEM;
736 return urbs;
737 }
738
739 for (frame = 0; frame < FRAMES_PER_URB; frame++) {
740 struct usb_iso_packet_descriptor *iso =
741 &urbs[i]->iso_frame_desc[frame];
742
743 iso->offset = BYTES_PER_FRAME * frame;
744 iso->length = BYTES_PER_FRAME;
745 }
746
747 urbs[i]->dev = usb_dev;
748 urbs[i]->pipe = pipe;
749 urbs[i]->transfer_buffer_length = FRAMES_PER_URB
750 * BYTES_PER_FRAME;
751 urbs[i]->context = &cdev->data_cb_info[i];
752 urbs[i]->interval = 1;
753 urbs[i]->number_of_packets = FRAMES_PER_URB;
754 urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
755 read_completed : write_completed;
756 }
757
758 *ret = 0;
759 return urbs;
760}
761
762static void free_urbs(struct urb **urbs)
763{
764 int i;
765
766 if (!urbs)
767 return;
768
769 for (i = 0; i < N_URBS; i++) {
770 if (!urbs[i])
771 continue;
772
773 usb_kill_urb(urbs[i]);
774 kfree(urbs[i]->transfer_buffer);
775 usb_free_urb(urbs[i]);
776 }
777
778 kfree(urbs);
779}
780
781int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev)
782{
783 int i, ret;
784 struct device *dev = caiaqdev_to_dev(cdev);
785
786 cdev->n_audio_in = max(cdev->spec.num_analog_audio_in,
787 cdev->spec.num_digital_audio_in) /
788 CHANNELS_PER_STREAM;
789 cdev->n_audio_out = max(cdev->spec.num_analog_audio_out,
790 cdev->spec.num_digital_audio_out) /
791 CHANNELS_PER_STREAM;
792 cdev->n_streams = max(cdev->n_audio_in, cdev->n_audio_out);
793
794 dev_dbg(dev, "cdev->n_audio_in = %d\n", cdev->n_audio_in);
795 dev_dbg(dev, "cdev->n_audio_out = %d\n", cdev->n_audio_out);
796 dev_dbg(dev, "cdev->n_streams = %d\n", cdev->n_streams);
797
798 if (cdev->n_streams > MAX_STREAMS) {
799 dev_err(dev, "unable to initialize device, too many streams.\n");
800 return -EINVAL;
801 }
802
803 if (cdev->n_streams < 1) {
804 dev_err(dev, "bogus number of streams: %d\n", cdev->n_streams);
805 return -EINVAL;
806 }
807
808 ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0,
809 cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm);
810
811 if (ret < 0) {
812 dev_err(dev, "snd_pcm_new() returned %d\n", ret);
813 return ret;
814 }
815
816 cdev->pcm->private_data = cdev;
817 strlcpy(cdev->pcm->name, cdev->product_name, sizeof(cdev->pcm->name));
818
819 memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
820 memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
821
822 memcpy(&cdev->pcm_info, &snd_usb_caiaq_pcm_hardware,
823 sizeof(snd_usb_caiaq_pcm_hardware));
824
825
826 cdev->samplerates = cdev->pcm_info.rates;
827 switch (cdev->chip.usb_id) {
828 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
829 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
830 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
831 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
832 cdev->samplerates |= SNDRV_PCM_RATE_192000;
833
834 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
835 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
836 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
837 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
838 cdev->samplerates |= SNDRV_PCM_RATE_88200;
839 break;
840 }
841
842 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
843 &snd_usb_caiaq_ops);
844 snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE,
845 &snd_usb_caiaq_ops);
846
847 cdev->data_cb_info =
848 kmalloc_array(N_URBS, sizeof(struct snd_usb_caiaq_cb_info),
849 GFP_KERNEL);
850
851 if (!cdev->data_cb_info)
852 return -ENOMEM;
853
854 cdev->outurb_active_mask = 0;
855 BUILD_BUG_ON(N_URBS > (sizeof(cdev->outurb_active_mask) * 8));
856
857 for (i = 0; i < N_URBS; i++) {
858 cdev->data_cb_info[i].cdev = cdev;
859 cdev->data_cb_info[i].index = i;
860 }
861
862 cdev->data_urbs_in = alloc_urbs(cdev, SNDRV_PCM_STREAM_CAPTURE, &ret);
863 if (ret < 0) {
864 kfree(cdev->data_cb_info);
865 free_urbs(cdev->data_urbs_in);
866 return ret;
867 }
868
869 cdev->data_urbs_out = alloc_urbs(cdev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
870 if (ret < 0) {
871 kfree(cdev->data_cb_info);
872 free_urbs(cdev->data_urbs_in);
873 free_urbs(cdev->data_urbs_out);
874 return ret;
875 }
876
877 return 0;
878}
879
880void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *cdev)
881{
882 struct device *dev = caiaqdev_to_dev(cdev);
883
884 dev_dbg(dev, "%s(%p)\n", __func__, cdev);
885 stream_stop(cdev);
886 free_urbs(cdev->data_urbs_in);
887 free_urbs(cdev->data_urbs_out);
888 kfree(cdev->data_cb_info);
889}
890
891
