projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ALSA: hda - Fix memory leak and error handling in CA0132 DSP loader
[deliverable/linux.git] / sound / usb / pcm.c
CommitLineData
e5779998
DM		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 */
16
17#include <linux/init.h>
9966ddaf 18#include <linux/slab.h>
edcd3633 19#include <linux/ratelimit.h>
e5779998
DM		 20#include <linux/usb.h>
21#include <linux/usb/audio.h>
7e847894 22#include <linux/usb/audio-v2.h>
e5779998
DM		 23
24#include <sound/core.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27
28#include "usbaudio.h"
29#include "card.h"
30#include "quirks.h"
31#include "debug.h"
c731bc96 32#include "endpoint.h"
e5779998
DM		 33#include "helper.h"
34#include "pcm.h"
79f920fb 35#include "clock.h"
88a8516a 36#include "power.h"
e5779998 37
edcd3633
DM		 38#define SUBSTREAM_FLAG_DATA_EP_STARTED 0
39#define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
40
294c4fb8
PLB		 41/* return the estimated delay based on USB frame counters */
42snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
43 unsigned int rate)
44{
45 int current_frame_number;
46 int frame_diff;
47 int est_delay;
48
48779a0b
TI		 49 if (!subs->last_delay)
50 return 0; /* short path */
51
294c4fb8
PLB		 52 current_frame_number = usb_get_current_frame_number(subs->dev);
53 /*
54 * HCD implementations use different widths, use lower 8 bits.
55 * The delay will be managed up to 256ms, which is more than
56 * enough
57 */
58 frame_diff = (current_frame_number - subs->last_frame_number) & 0xff;
59
60 /* Approximation based on number of samples per USB frame (ms),
61 some truncation for 44.1 but the estimate is good enough */
e4cc6153
PLB		 62 est_delay = frame_diff * rate / 1000;
63 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
64 est_delay = subs->last_delay - est_delay;
65 else
66 est_delay = subs->last_delay + est_delay;
67
294c4fb8
PLB		 68 if (est_delay < 0)
69 est_delay = 0;
70 return est_delay;
71}
72
e5779998
DM		 73/*
74 * return the current pcm pointer. just based on the hwptr_done value.
75 */
76static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
77{
78 struct snd_usb_substream *subs;
79 unsigned int hwptr_done;
80
81 subs = (struct snd_usb_substream *)substream->runtime->private_data;
978520b7
TI		 82 if (subs->stream->chip->shutdown)
83 return SNDRV_PCM_POS_XRUN;
e5779998
DM		 84 spin_lock(&subs->lock);
85 hwptr_done = subs->hwptr_done;
e4cc6153 86 substream->runtime->delay = snd_usb_pcm_delay(subs,
294c4fb8 87 substream->runtime->rate);
e5779998
DM		 88 spin_unlock(&subs->lock);
89 return hwptr_done / (substream->runtime->frame_bits >> 3);
90}
91
92/*
93 * find a matching audio format
94 */
61a70950 95static struct audioformat *find_format(struct snd_usb_substream *subs)
e5779998
DM		 96{
97 struct list_head *p;
98 struct audioformat *found = NULL;
99 int cur_attr = 0, attr;
100
101 list_for_each(p, &subs->fmt_list) {
102 struct audioformat *fp;
103 fp = list_entry(p, struct audioformat, list);
61a70950 104 if (!(fp->formats & (1uLL << subs->pcm_format)))
015eb0b0 105 continue;
61a70950 106 if (fp->channels != subs->channels)
e5779998 107 continue;
61a70950
DR		 108 if (subs->cur_rate < fp->rate_min ||
109 subs->cur_rate > fp->rate_max)
e5779998
DM		 110 continue;
111 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
112 unsigned int i;
113 for (i = 0; i < fp->nr_rates; i++)
61a70950 114 if (fp->rate_table[i] == subs->cur_rate)
e5779998
DM		 115 break;
116 if (i >= fp->nr_rates)
117 continue;
118 }
119 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
120 if (! found) {
121 found = fp;
122 cur_attr = attr;
123 continue;
124 }
125 /* avoid async out and adaptive in if the other method
126 * supports the same format.
127 * this is a workaround for the case like
128 * M-audio audiophile USB.
129 */
130 if (attr != cur_attr) {
131 if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
132 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
133 (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
134 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
135 continue;
136 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
137 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
138 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
139 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
140 found = fp;
141 cur_attr = attr;
142 continue;
143 }
144 }
145 /* find the format with the largest max. packet size */
146 if (fp->maxpacksize > found->maxpacksize) {
147 found = fp;
148 cur_attr = attr;
149 }
150 }
151 return found;
152}
153
767d75ad
DM		 154static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
155 struct usb_host_interface *alts,
156 struct audioformat *fmt)
157{
158 struct usb_device *dev = chip->dev;
159 unsigned int ep;
160 unsigned char data[1];
161 int err;
162
163 ep = get_endpoint(alts, 0)->bEndpointAddress;
164
767d75ad
DM		 165 data[0] = 1;
166 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
167 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
168 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
17d900c4 169 data, sizeof(data))) < 0) {
767d75ad
DM		 170 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
171 dev->devnum, iface, ep);
172 return err;
173 }
174
175 return 0;
176}
e5779998 177
92c25611
DM		 178static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
179 struct usb_host_interface *alts,
180 struct audioformat *fmt)
181{
182 struct usb_device *dev = chip->dev;
183 unsigned char data[1];
92c25611
DM		 184 int err;
185
92c25611
DM		 186 data[0] = 1;
187 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
188 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
189 UAC2_EP_CS_PITCH << 8, 0,
17d900c4 190 data, sizeof(data))) < 0) {
92c25611
DM		 191 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2)\n",
192 dev->devnum, iface, fmt->altsetting);
193 return err;
194 }
195
196 return 0;
197}
198
e5779998 199/*
92c25611 200 * initialize the pitch control and sample rate
e5779998 201 */
767d75ad 202int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
e5779998
DM		 203 struct usb_host_interface *alts,
204 struct audioformat *fmt)
205{
767d75ad
DM		 206 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
207
92c25611
DM		 208 /* if endpoint doesn't have pitch control, bail out */
209 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
210 return 0;
211
767d75ad
DM		 212 switch (altsd->bInterfaceProtocol) {
213 case UAC_VERSION_1:
a2acad82 214 default:
767d75ad
DM		 215 return init_pitch_v1(chip, iface, alts, fmt);
216
217 case UAC_VERSION_2:
92c25611 218 return init_pitch_v2(chip, iface, alts, fmt);
767d75ad 219 }
767d75ad
DM		 220}
221
a9bb3626 222static int start_endpoints(struct snd_usb_substream *subs, bool can_sleep)
edcd3633
DM		 223{
224 int err;
225
226 if (!subs->data_endpoint)
227 return -EINVAL;
228
229 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
230 struct snd_usb_endpoint *ep = subs->data_endpoint;
231
232 snd_printdd(KERN_DEBUG "Starting data EP @%p\n", ep);
233
234 ep->data_subs = subs;
015618b9 235 err = snd_usb_endpoint_start(ep, can_sleep);
edcd3633
DM		 236 if (err < 0) {
237 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
238 return err;
239 }
240 }
241
242 if (subs->sync_endpoint &&
243 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
244 struct snd_usb_endpoint *ep = subs->sync_endpoint;
245
2e4a263c
DM		 246 if (subs->data_endpoint->iface != subs->sync_endpoint->iface ||
247 subs->data_endpoint->alt_idx != subs->sync_endpoint->alt_idx) {
248 err = usb_set_interface(subs->dev,
249 subs->sync_endpoint->iface,
250 subs->sync_endpoint->alt_idx);
251 if (err < 0) {
252 snd_printk(KERN_ERR
253 "%d:%d:%d: cannot set interface (%d)\n",
254 subs->dev->devnum,
255 subs->sync_endpoint->iface,
256 subs->sync_endpoint->alt_idx, err);
257 return -EIO;
258 }
259 }
260
edcd3633
DM		 261 snd_printdd(KERN_DEBUG "Starting sync EP @%p\n", ep);
262
263 ep->sync_slave = subs->data_endpoint;
015618b9 264 err = snd_usb_endpoint_start(ep, can_sleep);
edcd3633
DM		 265 if (err < 0) {
266 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
267 return err;
268 }
269 }
270
271 return 0;
272}
273
a9bb3626 274static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
edcd3633
DM		 275{
276 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
b2eb950d 277 snd_usb_endpoint_stop(subs->sync_endpoint);
edcd3633
DM		 278
279 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
b2eb950d
TI		 280 snd_usb_endpoint_stop(subs->data_endpoint);
281
282 if (wait) {
283 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
284 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
285 }
edcd3633
DM		 286}
287
edcd3633
DM		 288static int deactivate_endpoints(struct snd_usb_substream *subs)
289{
290 int reta, retb;
291
292 reta = snd_usb_endpoint_deactivate(subs->sync_endpoint);
293 retb = snd_usb_endpoint_deactivate(subs->data_endpoint);
294
295 if (reta < 0)
296 return reta;
297
298 if (retb < 0)
299 return retb;
300
301 return 0;
302}
303
e5779998
DM		 304/*
305 * find a matching format and set up the interface
306 */
307static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
308{
309 struct usb_device *dev = subs->dev;
310 struct usb_host_interface *alts;
311 struct usb_interface_descriptor *altsd;
312 struct usb_interface *iface;
313 unsigned int ep, attr;
314 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
c75a8a7a 315 int err, implicit_fb = 0;
e5779998
DM		 316
317 iface = usb_ifnum_to_if(dev, fmt->iface);
318 if (WARN_ON(!iface))
319 return -EINVAL;
320 alts = &iface->altsetting[fmt->altset_idx];
321 altsd = get_iface_desc(alts);
322 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
323 return -EINVAL;
324
325 if (fmt == subs->cur_audiofmt)
326 return 0;
327
68e67f40
DM		 328 /* close the old interface */
329 if (subs->interface >= 0 && subs->interface != fmt->iface) {
330 err = usb_set_interface(subs->dev, subs->interface, 0);
331 if (err < 0) {
332 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed (%d)\n",
333 dev->devnum, fmt->iface, fmt->altsetting, err);
334 return -EIO;
335 }
336 subs->interface = -1;
337 subs->altset_idx = 0;
338 }
339
340 /* set interface */
341 if (subs->interface != fmt->iface ||
342 subs->altset_idx != fmt->altset_idx) {
343 err = usb_set_interface(dev, fmt->iface, fmt->altsetting);
344 if (err < 0) {
345 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed (%d)\n",
346 dev->devnum, fmt->iface, fmt->altsetting, err);
347 return -EIO;
348 }
349 snd_printdd(KERN_INFO "setting usb interface %d:%d\n",
350 fmt->iface, fmt->altsetting);
351 subs->interface = fmt->iface;
352 subs->altset_idx = fmt->altset_idx;
353 }
354
edcd3633
DM		 355 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
356 alts, fmt->endpoint, subs->direction,
357 SND_USB_ENDPOINT_TYPE_DATA);
358 if (!subs->data_endpoint)
359 return -EINVAL;
e5779998
DM		 360
361 /* we need a sync pipe in async OUT or adaptive IN mode */
362 /* check the number of EP, since some devices have broken
363 * descriptors which fool us. if it has only one EP,
364 * assume it as adaptive-out or sync-in.
365 */
366 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
c75a8a7a
DM		 367
368 switch (subs->stream->chip->usb_id) {
ca10a7eb
EZ		 369 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
370 if (is_playback) {
371 implicit_fb = 1;
372 ep = 0x81;
373 iface = usb_ifnum_to_if(dev, 3);
374
375 if (!iface || iface->num_altsetting == 0)
376 return -EINVAL;
377
378 alts = &iface->altsetting[1];
379 goto add_sync_ep;
380 }
381 break;
c75a8a7a
DM		 382 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
383 case USB_ID(0x0763, 0x2081):
384 if (is_playback) {
385 implicit_fb = 1;
edcd3633
DM		 386 ep = 0x81;
387 iface = usb_ifnum_to_if(dev, 2);
c75a8a7a
DM		 388
389 if (!iface || iface->num_altsetting == 0)
390 return -EINVAL;
391
edcd3633
DM		 392 alts = &iface->altsetting[1];
393 goto add_sync_ep;
394 }
c75a8a7a 395 }
edcd3633 396
c75a8a7a
DM		 397 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
398 (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
399 altsd->bNumEndpoints >= 2) {
e5779998
DM		 400 /* check sync-pipe endpoint */
401 /* ... and check descriptor size before accessing bSynchAddress
402 because there is a version of the SB Audigy 2 NX firmware lacking
403 the audio fields in the endpoint descriptors */
fde854bd 404 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
e5779998 405 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
c75a8a7a
DM		 406 get_endpoint(alts, 1)->bSynchAddress != 0 &&
407 !implicit_fb)) {
7fb75db1
DM		 408 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
409 dev->devnum, fmt->iface, fmt->altsetting,
410 get_endpoint(alts, 1)->bmAttributes,
411 get_endpoint(alts, 1)->bLength,
412 get_endpoint(alts, 1)->bSynchAddress);
e5779998
DM		 413 return -EINVAL;
414 }
415 ep = get_endpoint(alts, 1)->bEndpointAddress;
7fb75db1
DM		 416 if (!implicit_fb &&
417 get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
e5779998 418 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
7fb75db1
DM		 419 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
420 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
421 dev->devnum, fmt->iface, fmt->altsetting,
422 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
e5779998
DM		 423 return -EINVAL;
424 }
c75a8a7a
DM		 425
426 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
427 == USB_ENDPOINT_USAGE_IMPLICIT_FB;
428
edcd3633
DM		 429add_sync_ep:
430 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
431 alts, ep, !subs->direction,
c75a8a7a
DM		 432 implicit_fb ?
433 SND_USB_ENDPOINT_TYPE_DATA :
434 SND_USB_ENDPOINT_TYPE_SYNC);
edcd3633
DM		 435 if (!subs->sync_endpoint)
436 return -EINVAL;
437
438 subs->data_endpoint->sync_master = subs->sync_endpoint;
439 }
e5779998 440
9e9b5946 441 if ((err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt)) < 0)
e5779998
DM		 442 return err;
443
444 subs->cur_audiofmt = fmt;
445
446 snd_usb_set_format_quirk(subs, fmt);
447
448#if 0
449 printk(KERN_DEBUG
450 "setting done: format = %d, rate = %d..%d, channels = %d\n",
451 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
452 printk(KERN_DEBUG
453 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
454 subs->datapipe, subs->syncpipe);
455#endif
456
457 return 0;
458}
459
0d9741c0
EZ		 460/*
461 * Return the score of matching two audioformats.
462 * Veto the audioformat if:
463 * - It has no channels for some reason.
464 * - Requested PCM format is not supported.
465 * - Requested sample rate is not supported.
466 */
467static int match_endpoint_audioformats(struct audioformat *fp,
468 struct audioformat *match, int rate,
469 snd_pcm_format_t pcm_format)
470{
471 int i;
472 int score = 0;
473
474 if (fp->channels < 1) {
475 snd_printdd("%s: (fmt @%p) no channels\n", __func__, fp);
476 return 0;
477 }
478
479 if (!(fp->formats & (1ULL << pcm_format))) {
480 snd_printdd("%s: (fmt @%p) no match for format %d\n", __func__,
481 fp, pcm_format);
482 return 0;
483 }
484
485 for (i = 0; i < fp->nr_rates; i++) {
486 if (fp->rate_table[i] == rate) {
487 score++;
488 break;
489 }
490 }
491 if (!score) {
492 snd_printdd("%s: (fmt @%p) no match for rate %d\n", __func__,
493 fp, rate);
494 return 0;
495 }
496
497 if (fp->channels == match->channels)
498 score++;
499
500 snd_printdd("%s: (fmt @%p) score %d\n", __func__, fp, score);
501
502 return score;
503}
504
505/*
506 * Configure the sync ep using the rate and pcm format of the data ep.
507 */
508static int configure_sync_endpoint(struct snd_usb_substream *subs)
509{
510 int ret;
511 struct audioformat *fp;
512 struct audioformat *sync_fp = NULL;
513 int cur_score = 0;
514 int sync_period_bytes = subs->period_bytes;
515 struct snd_usb_substream *sync_subs =
516 &subs->stream->substream[subs->direction ^ 1];
517
31be5425
TI		 518 if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA ||
519 !subs->stream)
520 return snd_usb_endpoint_set_params(subs->sync_endpoint,
521 subs->pcm_format,
522 subs->channels,
523 subs->period_bytes,
524 subs->cur_rate,
525 subs->cur_audiofmt,
526 NULL);
527
0d9741c0
EZ		 528 /* Try to find the best matching audioformat. */
529 list_for_each_entry(fp, &sync_subs->fmt_list, list) {
530 int score = match_endpoint_audioformats(fp, subs->cur_audiofmt,
531 subs->cur_rate, subs->pcm_format);
532
533 if (score > cur_score) {
534 sync_fp = fp;
535 cur_score = score;
536 }
537 }
538
539 if (unlikely(sync_fp == NULL)) {
540 snd_printk(KERN_ERR "%s: no valid audioformat for sync ep %x found\n",
541 __func__, sync_subs->ep_num);
542 return -EINVAL;
543 }
544
545 /*
546 * Recalculate the period bytes if channel number differ between
547 * data and sync ep audioformat.
548 */
549 if (sync_fp->channels != subs->channels) {
550 sync_period_bytes = (subs->period_bytes / subs->channels) *
551 sync_fp->channels;
552 snd_printdd("%s: adjusted sync ep period bytes (%d -> %d)\n",
553 __func__, subs->period_bytes, sync_period_bytes);
554 }
555
556 ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
557 subs->pcm_format,
558 sync_fp->channels,
559 sync_period_bytes,
560 subs->cur_rate,
561 sync_fp,
562 NULL);
563
564 return ret;
565}
566
61a70950
DR		 567/*
568 * configure endpoint params
569 *
570 * called during initial setup and upon resume
571 */
572static int configure_endpoint(struct snd_usb_substream *subs)
573{
574 int ret;
575
61a70950 576 /* format changed */
b0db6063 577 stop_endpoints(subs, true);
61a70950
DR		 578 ret = snd_usb_endpoint_set_params(subs->data_endpoint,
579 subs->pcm_format,
580 subs->channels,
581 subs->period_bytes,
582 subs->cur_rate,
583 subs->cur_audiofmt,
584 subs->sync_endpoint);
585 if (ret < 0)
978520b7 586 return ret;
61a70950
DR		 587
588 if (subs->sync_endpoint)
0d9741c0
EZ		 589 ret = configure_sync_endpoint(subs);
590
61a70950
DR		 591 return ret;
592}
593
e5779998
DM		 594/*
595 * hw_params callback
596 *
597 * allocate a buffer and set the given audio format.
598 *
599 * so far we use a physically linear buffer although packetize transfer
600 * doesn't need a continuous area.
601 * if sg buffer is supported on the later version of alsa, we'll follow
602 * that.
603 */
604static int snd_usb_hw_params(struct snd_pcm_substream *substream,
605 struct snd_pcm_hw_params *hw_params)
606{
607 struct snd_usb_substream *subs = substream->runtime->private_data;
608 struct audioformat *fmt;
61a70950 609 int ret;
e5779998
DM		 610
611 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
612 params_buffer_bytes(hw_params));
613 if (ret < 0)
614 return ret;
615
61a70950
DR		 616 subs->pcm_format = params_format(hw_params);
617 subs->period_bytes = params_period_bytes(hw_params);
618 subs->channels = params_channels(hw_params);
619 subs->cur_rate = params_rate(hw_params);
620
621 fmt = find_format(subs);
e5779998
DM		 622 if (!fmt) {
623 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
61a70950 624 subs->pcm_format, subs->cur_rate, subs->channels);
e5779998
DM		 625 return -EINVAL;
626 }
627
34f3c89f 628 down_read(&subs->stream->chip->shutdown_rwsem);
978520b7
TI		 629 if (subs->stream->chip->shutdown)
630 ret = -ENODEV;
631 else
632 ret = set_format(subs, fmt);
34f3c89f 633 up_read(&subs->stream->chip->shutdown_rwsem);
978520b7 634 if (ret < 0)
e5779998
DM		 635 return ret;
636
61a70950
DR		 637 subs->interface = fmt->iface;
638 subs->altset_idx = fmt->altset_idx;
384dc085 639 subs->need_setup_ep = true;
715a1705 640
61a70950 641 return 0;
e5779998
DM		 642}
643
644/*
645 * hw_free callback
646 *
647 * reset the audio format and release the buffer
648 */
649static int snd_usb_hw_free(struct snd_pcm_substream *substream)
650{
651 struct snd_usb_substream *subs = substream->runtime->private_data;
652
653 subs->cur_audiofmt = NULL;
654 subs->cur_rate = 0;
655 subs->period_bytes = 0;
34f3c89f 656 down_read(&subs->stream->chip->shutdown_rwsem);
978520b7 657 if (!subs->stream->chip->shutdown) {
a9bb3626 658 stop_endpoints(subs, true);
978520b7
TI		 659 deactivate_endpoints(subs);
660 }
34f3c89f 661 up_read(&subs->stream->chip->shutdown_rwsem);
e5779998
DM		 662 return snd_pcm_lib_free_vmalloc_buffer(substream);
663}
664
665/*
666 * prepare callback
667 *
668 * only a few subtle things...
669 */
670static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
671{
672 struct snd_pcm_runtime *runtime = substream->runtime;
673 struct snd_usb_substream *subs = runtime->private_data;
61a70950
DR		 674 struct usb_host_interface *alts;
675 struct usb_interface *iface;
676 int ret;
e5779998
DM		 677
678 if (! subs->cur_audiofmt) {
679 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
680 return -ENXIO;
681 }
682
34f3c89f 683 down_read(&subs->stream->chip->shutdown_rwsem);
978520b7
TI		 684 if (subs->stream->chip->shutdown) {
685 ret = -ENODEV;
686 goto unlock;
687 }
688 if (snd_BUG_ON(!subs->data_endpoint)) {
689 ret = -EIO;
690 goto unlock;
691 }
edcd3633 692
f58161ba
TI		 693 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
694 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
695
61a70950
DR		 696 ret = set_format(subs, subs->cur_audiofmt);
697 if (ret < 0)
978520b7 698 goto unlock;
61a70950
DR		 699
700 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface);
701 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx];
702 ret = snd_usb_init_sample_rate(subs->stream->chip,
703 subs->cur_audiofmt->iface,
704 alts,
705 subs->cur_audiofmt,
706 subs->cur_rate);
707 if (ret < 0)
978520b7 708 goto unlock;
61a70950 709
384dc085
TI		 710 if (subs->need_setup_ep) {
711 ret = configure_endpoint(subs);
712 if (ret < 0)
978520b7 713 goto unlock;
384dc085
TI		 714 subs->need_setup_ep = false;
715 }
61a70950 716
e5779998 717 /* some unit conversions in runtime */
edcd3633
DM		 718 subs->data_endpoint->maxframesize =
719 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
720 subs->data_endpoint->curframesize =
721 bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
e5779998
DM		 722
723 /* reset the pointer */
724 subs->hwptr_done = 0;
725 subs->transfer_done = 0;
294c4fb8
PLB		 726 subs->last_delay = 0;
727 subs->last_frame_number = 0;
e5779998
DM		 728 runtime->delay = 0;
729
edcd3633
DM		 730 /* for playback, submit the URBs now; otherwise, the first hwptr_done
731 * updates for all URBs would happen at the same time when starting */
732 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
a9bb3626 733 ret = start_endpoints(subs, true);
edcd3633 734
978520b7 735 unlock:
34f3c89f 736 up_read(&subs->stream->chip->shutdown_rwsem);
978520b7 737 return ret;
e5779998
DM		 738}
739
740static struct snd_pcm_hardware snd_usb_hardware =
741{
742 .info = SNDRV_PCM_INFO_MMAP |
743 SNDRV_PCM_INFO_MMAP_VALID |
744 SNDRV_PCM_INFO_BATCH |
745 SNDRV_PCM_INFO_INTERLEAVED |
746 SNDRV_PCM_INFO_BLOCK_TRANSFER |
747 SNDRV_PCM_INFO_PAUSE,
748 .buffer_bytes_max = 1024 * 1024,
749 .period_bytes_min = 64,
750 .period_bytes_max = 512 * 1024,
751 .periods_min = 2,
752 .periods_max = 1024,
753};
754
755static int hw_check_valid_format(struct snd_usb_substream *subs,
756 struct snd_pcm_hw_params *params,
757 struct audioformat *fp)
758{
759 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
760 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
761 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
762 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
015eb0b0 763 struct snd_mask check_fmts;
e5779998
DM		 764 unsigned int ptime;
765
766 /* check the format */
015eb0b0
CL		 767 snd_mask_none(&check_fmts);
768 check_fmts.bits[0] = (u32)fp->formats;
769 check_fmts.bits[1] = (u32)(fp->formats >> 32);
770 snd_mask_intersect(&check_fmts, fmts);
771 if (snd_mask_empty(&check_fmts)) {
e5779998
DM		 772 hwc_debug(" > check: no supported format %d\n", fp->format);
773 return 0;
774 }
775 /* check the channels */
776 if (fp->channels < ct->min || fp->channels > ct->max) {
777 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
778 return 0;
779 }
780 /* check the rate is within the range */
781 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
782 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
783 return 0;
784 }
785 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
786 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
787 return 0;
788 }
789 /* check whether the period time is >= the data packet interval */
978520b7 790 if (subs->speed != USB_SPEED_FULL) {
e5779998
DM		 791 ptime = 125 * (1 << fp->datainterval);
792 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
793 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
794 return 0;
795 }
796 }
797 return 1;
798}
799
800static int hw_rule_rate(struct snd_pcm_hw_params *params,
801 struct snd_pcm_hw_rule *rule)
802{
803 struct snd_usb_substream *subs = rule->private;
804 struct list_head *p;
805 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
806 unsigned int rmin, rmax;
807 int changed;
808
809 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
810 changed = 0;
811 rmin = rmax = 0;
812 list_for_each(p, &subs->fmt_list) {
813 struct audioformat *fp;
814 fp = list_entry(p, struct audioformat, list);
815 if (!hw_check_valid_format(subs, params, fp))
816 continue;
817 if (changed++) {
818 if (rmin > fp->rate_min)
819 rmin = fp->rate_min;
820 if (rmax < fp->rate_max)
821 rmax = fp->rate_max;
822 } else {
823 rmin = fp->rate_min;
824 rmax = fp->rate_max;
825 }
826 }
827
828 if (!changed) {
829 hwc_debug(" --> get empty\n");
830 it->empty = 1;
831 return -EINVAL;
832 }
833
834 changed = 0;
835 if (it->min < rmin) {
836 it->min = rmin;
837 it->openmin = 0;
838 changed = 1;
839 }
840 if (it->max > rmax) {
841 it->max = rmax;
842 it->openmax = 0;
843 changed = 1;
844 }
845 if (snd_interval_checkempty(it)) {
846 it->empty = 1;
847 return -EINVAL;
848 }
849 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
850 return changed;
851}
852
853
854static int hw_rule_channels(struct snd_pcm_hw_params *params,
855 struct snd_pcm_hw_rule *rule)
856{
857 struct snd_usb_substream *subs = rule->private;
858 struct list_head *p;
859 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
860 unsigned int rmin, rmax;
861 int changed;
862
863 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
864 changed = 0;
865 rmin = rmax = 0;
866 list_for_each(p, &subs->fmt_list) {
867 struct audioformat *fp;
868 fp = list_entry(p, struct audioformat, list);
869 if (!hw_check_valid_format(subs, params, fp))
870 continue;
871 if (changed++) {
872 if (rmin > fp->channels)
873 rmin = fp->channels;
874 if (rmax < fp->channels)
875 rmax = fp->channels;
876 } else {
877 rmin = fp->channels;
878 rmax = fp->channels;
879 }
880 }
881
882 if (!changed) {
883 hwc_debug(" --> get empty\n");
884 it->empty = 1;
885 return -EINVAL;
886 }
887
888 changed = 0;
889 if (it->min < rmin) {
890 it->min = rmin;
891 it->openmin = 0;
892 changed = 1;
893 }
894 if (it->max > rmax) {
895 it->max = rmax;
896 it->openmax = 0;
897 changed = 1;
898 }
899 if (snd_interval_checkempty(it)) {
900 it->empty = 1;
901 return -EINVAL;
902 }
903 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
904 return changed;
905}
906
907static int hw_rule_format(struct snd_pcm_hw_params *params,
908 struct snd_pcm_hw_rule *rule)
909{
910 struct snd_usb_substream *subs = rule->private;
911 struct list_head *p;
912 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
913 u64 fbits;
914 u32 oldbits[2];
915 int changed;
916
917 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
918 fbits = 0;
919 list_for_each(p, &subs->fmt_list) {
920 struct audioformat *fp;
921 fp = list_entry(p, struct audioformat, list);
922 if (!hw_check_valid_format(subs, params, fp))
923 continue;
015eb0b0 924 fbits |= fp->formats;
e5779998
DM		 925 }
926
927 oldbits[0] = fmt->bits[0];
928 oldbits[1] = fmt->bits[1];
929 fmt->bits[0] &= (u32)fbits;
930 fmt->bits[1] &= (u32)(fbits >> 32);
931 if (!fmt->bits[0] && !fmt->bits[1]) {
932 hwc_debug(" --> get empty\n");
933 return -EINVAL;
934 }
935 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
936 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
937 return changed;
938}
939
940static int hw_rule_period_time(struct snd_pcm_hw_params *params,
941 struct snd_pcm_hw_rule *rule)
942{
943 struct snd_usb_substream *subs = rule->private;
944 struct audioformat *fp;
945 struct snd_interval *it;
946 unsigned char min_datainterval;
947 unsigned int pmin;
948 int changed;
949
950 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
951 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
952 min_datainterval = 0xff;
953 list_for_each_entry(fp, &subs->fmt_list, list) {
954 if (!hw_check_valid_format(subs, params, fp))
955 continue;
956 min_datainterval = min(min_datainterval, fp->datainterval);
957 }
958 if (min_datainterval == 0xff) {
a7ce2e0d 959 hwc_debug(" --> get empty\n");
e5779998
DM		 960 it->empty = 1;
961 return -EINVAL;
962 }
963 pmin = 125 * (1 << min_datainterval);
964 changed = 0;
965 if (it->min < pmin) {
966 it->min = pmin;
967 it->openmin = 0;
968 changed = 1;
969 }
970 if (snd_interval_checkempty(it)) {
971 it->empty = 1;
972 return -EINVAL;
973 }
974 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
975 return changed;
976}
977
978/*
979 * If the device supports unusual bit rates, does the request meet these?
980 */
981static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
982 struct snd_usb_substream *subs)
983{
984 struct audioformat *fp;
0717d0f5 985 int *rate_list;
e5779998
DM		 986 int count = 0, needs_knot = 0;
987 int err;
988
5cd5d7c4
CL		 989 kfree(subs->rate_list.list);
990 subs->rate_list.list = NULL;
991
e5779998
DM		 992 list_for_each_entry(fp, &subs->fmt_list, list) {
993 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
994 return 0;
995 count += fp->nr_rates;
996 if (fp->rates & SNDRV_PCM_RATE_KNOT)
997 needs_knot = 1;
998 }
999 if (!needs_knot)
1000 return 0;
1001
0717d0f5
TI		 1002 subs->rate_list.list = rate_list =
1003 kmalloc(sizeof(int) * count, GFP_KERNEL);
8a8d56b2
JJ		 1004 if (!subs->rate_list.list)
1005 return -ENOMEM;
1006 subs->rate_list.count = count;
e5779998
DM		 1007 subs->rate_list.mask = 0;
1008 count = 0;
1009 list_for_each_entry(fp, &subs->fmt_list, list) {
1010 int i;
1011 for (i = 0; i < fp->nr_rates; i++)
0717d0f5 1012 rate_list[count++] = fp->rate_table[i];
e5779998
DM		 1013 }
1014 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1015 &subs->rate_list);
1016 if (err < 0)
1017 return err;
1018
1019 return 0;
1020}
1021
1022
1023/*
1024 * set up the runtime hardware information.
1025 */
1026
1027static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1028{
1029 struct list_head *p;
1030 unsigned int pt, ptmin;
1031 int param_period_time_if_needed;
1032 int err;
1033
1034 runtime->hw.formats = subs->formats;
1035
1036 runtime->hw.rate_min = 0x7fffffff;
1037 runtime->hw.rate_max = 0;
1038 runtime->hw.channels_min = 256;
1039 runtime->hw.channels_max = 0;
1040 runtime->hw.rates = 0;
1041 ptmin = UINT_MAX;
1042 /* check min/max rates and channels */
1043 list_for_each(p, &subs->fmt_list) {
1044 struct audioformat *fp;
1045 fp = list_entry(p, struct audioformat, list);
1046 runtime->hw.rates |= fp->rates;
1047 if (runtime->hw.rate_min > fp->rate_min)
1048 runtime->hw.rate_min = fp->rate_min;
1049 if (runtime->hw.rate_max < fp->rate_max)
1050 runtime->hw.rate_max = fp->rate_max;
1051 if (runtime->hw.channels_min > fp->channels)
1052 runtime->hw.channels_min = fp->channels;
1053 if (runtime->hw.channels_max < fp->channels)
1054 runtime->hw.channels_max = fp->channels;
1055 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
1056 /* FIXME: there might be more than one audio formats... */
1057 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1058 fp->frame_size;
1059 }
1060 pt = 125 * (1 << fp->datainterval);
1061 ptmin = min(ptmin, pt);
1062 }
88a8516a
ON		 1063 err = snd_usb_autoresume(subs->stream->chip);
1064 if (err < 0)
1065 return err;
e5779998
DM		 1066
1067 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
978520b7 1068 if (subs->speed == USB_SPEED_FULL)
e5779998
DM		 1069 /* full speed devices have fixed data packet interval */
1070 ptmin = 1000;
1071 if (ptmin == 1000)
1072 /* if period time doesn't go below 1 ms, no rules needed */
1073 param_period_time_if_needed = -1;
1074 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1075 ptmin, UINT_MAX);
1076
1077 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1078 hw_rule_rate, subs,
1079 SNDRV_PCM_HW_PARAM_FORMAT,
1080 SNDRV_PCM_HW_PARAM_CHANNELS,
1081 param_period_time_if_needed,
1082 -1)) < 0)
88a8516a 1083 goto rep_err;
e5779998
DM		 1084 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1085 hw_rule_channels, subs,
1086 SNDRV_PCM_HW_PARAM_FORMAT,
1087 SNDRV_PCM_HW_PARAM_RATE,
1088 param_period_time_if_needed,
1089 -1)) < 0)
88a8516a 1090 goto rep_err;
e5779998
DM		 1091 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1092 hw_rule_format, subs,
1093 SNDRV_PCM_HW_PARAM_RATE,
1094 SNDRV_PCM_HW_PARAM_CHANNELS,
1095 param_period_time_if_needed,
1096 -1)) < 0)
88a8516a 1097 goto rep_err;
e5779998
DM		 1098 if (param_period_time_if_needed >= 0) {
1099 err = snd_pcm_hw_rule_add(runtime, 0,
1100 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1101 hw_rule_period_time, subs,
1102 SNDRV_PCM_HW_PARAM_FORMAT,
1103 SNDRV_PCM_HW_PARAM_CHANNELS,
1104 SNDRV_PCM_HW_PARAM_RATE,
1105 -1);
1106 if (err < 0)
88a8516a 1107 goto rep_err;
e5779998
DM		 1108 }
1109 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
88a8516a 1110 goto rep_err;
e5779998 1111 return 0;
88a8516a
ON		 1112
1113rep_err:
1114 snd_usb_autosuspend(subs->stream->chip);
1115 return err;
e5779998
DM		 1116}
1117
1118static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1119{
1120 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1121 struct snd_pcm_runtime *runtime = substream->runtime;
1122 struct snd_usb_substream *subs = &as->substream[direction];
1123
1124 subs->interface = -1;
e11b4e0e 1125 subs->altset_idx = 0;
e5779998
DM		 1126 runtime->hw = snd_usb_hardware;
1127 runtime->private_data = subs;
1128 subs->pcm_substream = substream;
88a8516a 1129 /* runtime PM is also done there */
e5779998
DM		 1130 return setup_hw_info(runtime, subs);
1131}
1132
1133static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1134{
1135 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1136 struct snd_usb_substream *subs = &as->substream[direction];
1137
b0db6063 1138 stop_endpoints(subs, true);
68e67f40
DM		 1139
1140 if (!as->chip->shutdown && subs->interface >= 0) {
1141 usb_set_interface(subs->dev, subs->interface, 0);
1142 subs->interface = -1;
1143 }
1144
e5779998 1145 subs->pcm_substream = NULL;
88a8516a 1146 snd_usb_autosuspend(subs->stream->chip);
edcd3633 1147
68e67f40 1148 return 0;
edcd3633
DM		 1149}
1150
1151/* Since a URB can handle only a single linear buffer, we must use double
1152 * buffering when the data to be transferred overflows the buffer boundary.
1153 * To avoid inconsistencies when updating hwptr_done, we use double buffering
1154 * for all URBs.
1155 */
1156static void retire_capture_urb(struct snd_usb_substream *subs,
1157 struct urb *urb)
1158{
1159 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1160 unsigned int stride, frames, bytes, oldptr;
1161 int i, period_elapsed = 0;
1162 unsigned long flags;
1163 unsigned char *cp;
e4cc6153
PLB		 1164 int current_frame_number;
1165
1166 /* read frame number here, update pointer in critical section */
1167 current_frame_number = usb_get_current_frame_number(subs->dev);
edcd3633
DM		 1168
1169 stride = runtime->frame_bits >> 3;
1170
1171 for (i = 0; i < urb->number_of_packets; i++) {
1172 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1173 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
1174 snd_printdd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
1175 // continue;
1176 }
1177 bytes = urb->iso_frame_desc[i].actual_length;
1178 frames = bytes / stride;
1179 if (!subs->txfr_quirk)
1180 bytes = frames * stride;
1181 if (bytes % (runtime->sample_bits >> 3) != 0) {
edcd3633 1182 int oldbytes = bytes;
edcd3633
DM		 1183 bytes = frames * stride;
1184 snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n",
1185 oldbytes, bytes);
1186 }
1187 /* update the current pointer */
1188 spin_lock_irqsave(&subs->lock, flags);
1189 oldptr = subs->hwptr_done;
1190 subs->hwptr_done += bytes;
1191 if (subs->hwptr_done >= runtime->buffer_size * stride)
1192 subs->hwptr_done -= runtime->buffer_size * stride;
1193 frames = (bytes + (oldptr % stride)) / stride;
1194 subs->transfer_done += frames;
1195 if (subs->transfer_done >= runtime->period_size) {
1196 subs->transfer_done -= runtime->period_size;
1197 period_elapsed = 1;
1198 }
e4cc6153
PLB		 1199 /* capture delay is by construction limited to one URB,
1200 * reset delays here
1201 */
1202 runtime->delay = subs->last_delay = 0;
1203
1204 /* realign last_frame_number */
1205 subs->last_frame_number = current_frame_number;
1206 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1207
edcd3633
DM		 1208 spin_unlock_irqrestore(&subs->lock, flags);
1209 /* copy a data chunk */
1210 if (oldptr + bytes > runtime->buffer_size * stride) {
1211 unsigned int bytes1 =
1212 runtime->buffer_size * stride - oldptr;
1213 memcpy(runtime->dma_area + oldptr, cp, bytes1);
1214 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1215 } else {
1216 memcpy(runtime->dma_area + oldptr, cp, bytes);
1217 }
1218 }
1219
1220 if (period_elapsed)
1221 snd_pcm_period_elapsed(subs->pcm_substream);
1222}
1223
1224static void prepare_playback_urb(struct snd_usb_substream *subs,
1225 struct urb *urb)
1226{
1227 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
245baf98 1228 struct snd_usb_endpoint *ep = subs->data_endpoint;
edcd3633
DM		 1229 struct snd_urb_ctx *ctx = urb->context;
1230 unsigned int counts, frames, bytes;
1231 int i, stride, period_elapsed = 0;
1232 unsigned long flags;
1233
1234 stride = runtime->frame_bits >> 3;
1235
1236 frames = 0;
1237 urb->number_of_packets = 0;
1238 spin_lock_irqsave(&subs->lock, flags);
1239 for (i = 0; i < ctx->packets; i++) {
245baf98
DM		 1240 if (ctx->packet_size[i])
1241 counts = ctx->packet_size[i];
1242 else
1243 counts = snd_usb_endpoint_next_packet_size(ep);
1244
edcd3633
DM		 1245 /* set up descriptor */
1246 urb->iso_frame_desc[i].offset = frames * stride;
1247 urb->iso_frame_desc[i].length = counts * stride;
1248 frames += counts;
1249 urb->number_of_packets++;
1250 subs->transfer_done += counts;
1251 if (subs->transfer_done >= runtime->period_size) {
1252 subs->transfer_done -= runtime->period_size;
1253 period_elapsed = 1;
1254 if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1255 if (subs->transfer_done > 0) {
1256 /* FIXME: fill-max mode is not
1257 * supported yet */
1258 frames -= subs->transfer_done;
1259 counts -= subs->transfer_done;
1260 urb->iso_frame_desc[i].length =
1261 counts * stride;
1262 subs->transfer_done = 0;
1263 }
1264 i++;
1265 if (i < ctx->packets) {
1266 /* add a transfer delimiter */
1267 urb->iso_frame_desc[i].offset =
1268 frames * stride;
1269 urb->iso_frame_desc[i].length = 0;
1270 urb->number_of_packets++;
1271 }
1272 break;
1273 }
1274 }
1275 if (period_elapsed &&
1276 !snd_usb_endpoint_implict_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */
1277 break;
1278 }
1279 bytes = frames * stride;
1280 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
1281 /* err, the transferred area goes over buffer boundary. */
1282 unsigned int bytes1 =
1283 runtime->buffer_size * stride - subs->hwptr_done;
1284 memcpy(urb->transfer_buffer,
1285 runtime->dma_area + subs->hwptr_done, bytes1);
1286 memcpy(urb->transfer_buffer + bytes1,
1287 runtime->dma_area, bytes - bytes1);
1288 } else {
1289 memcpy(urb->transfer_buffer,
1290 runtime->dma_area + subs->hwptr_done, bytes);
1291 }
1292 subs->hwptr_done += bytes;
1293 if (subs->hwptr_done >= runtime->buffer_size * stride)
1294 subs->hwptr_done -= runtime->buffer_size * stride;
fbcfbf5f
DM		 1295
1296 /* update delay with exact number of samples queued */
1297 runtime->delay = subs->last_delay;
edcd3633 1298 runtime->delay += frames;
fbcfbf5f
DM		 1299 subs->last_delay = runtime->delay;
1300
1301 /* realign last_frame_number */
1302 subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1303 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1304
edcd3633
DM		 1305 spin_unlock_irqrestore(&subs->lock, flags);
1306 urb->transfer_buffer_length = bytes;
1307 if (period_elapsed)
1308 snd_pcm_period_elapsed(subs->pcm_substream);
1309}
1310
1311/*
1312 * process after playback data complete
1313 * - decrease the delay count again
1314 */
1315static void retire_playback_urb(struct snd_usb_substream *subs,
1316 struct urb *urb)
1317{
1318 unsigned long flags;
1319 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1320 int stride = runtime->frame_bits >> 3;
1321 int processed = urb->transfer_buffer_length / stride;
fbcfbf5f 1322 int est_delay;
edcd3633 1323
1213a205
TI		 1324 /* ignore the delay accounting when procssed=0 is given, i.e.
1325 * silent payloads are procssed before handling the actual data
1326 */
1327 if (!processed)
1328 return;
1329
edcd3633 1330 spin_lock_irqsave(&subs->lock, flags);
48779a0b
TI		 1331 if (!subs->last_delay)
1332 goto out; /* short path */
1333
fbcfbf5f
DM		 1334 est_delay = snd_usb_pcm_delay(subs, runtime->rate);
1335 /* update delay with exact number of samples played */
1336 if (processed > subs->last_delay)
1337 subs->last_delay = 0;
edcd3633 1338 else
fbcfbf5f
DM		 1339 subs->last_delay -= processed;
1340 runtime->delay = subs->last_delay;
1341
1342 /*
1343 * Report when delay estimate is off by more than 2ms.
1344 * The error should be lower than 2ms since the estimate relies
1345 * on two reads of a counter updated every ms.
1346 */
1347 if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
1348 snd_printk(KERN_DEBUG "delay: estimated %d, actual %d\n",
1349 est_delay, subs->last_delay);
1350
48779a0b
TI		 1351 if (!subs->running) {
1352 /* update last_frame_number for delay counting here since
1353 * prepare_playback_urb won't be called during pause
1354 */
1355 subs->last_frame_number =
1356 usb_get_current_frame_number(subs->dev) & 0xff;
1357 }
1358
1359 out:
edcd3633 1360 spin_unlock_irqrestore(&subs->lock, flags);
e5779998
DM		 1361}
1362
1363static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1364{
1365 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1366}
1367
1368static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1369{
1370 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1371}
1372
1373static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1374{
1375 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1376}
1377
1378static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1379{
1380 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1381}
1382
edcd3633
DM		 1383static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1384 int cmd)
1385{
1386 struct snd_usb_substream *subs = substream->runtime->private_data;
1387
1388 switch (cmd) {
1389 case SNDRV_PCM_TRIGGER_START:
1390 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1391 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
1392 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1393 subs->running = 1;
edcd3633
DM		 1394 return 0;
1395 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1396 stop_endpoints(subs, false);
97f8d3b6 1397 subs->running = 0;
edcd3633
DM		 1398 return 0;
1399 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1400 subs->data_endpoint->prepare_data_urb = NULL;
48779a0b
TI		 1401 /* keep retire_data_urb for delay calculation */
1402 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1403 subs->running = 0;
edcd3633
DM		 1404 return 0;
1405 }
1406
1407 return -EINVAL;
1408}
1409
afe25967
DM		 1410static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream,
1411 int cmd)
edcd3633
DM		 1412{
1413 int err;
1414 struct snd_usb_substream *subs = substream->runtime->private_data;
1415
1416 switch (cmd) {
1417 case SNDRV_PCM_TRIGGER_START:
a9bb3626 1418 err = start_endpoints(subs, false);
edcd3633
DM		 1419 if (err < 0)
1420 return err;
1421
1422 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1423 subs->running = 1;
edcd3633
DM		 1424 return 0;
1425 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1426 stop_endpoints(subs, false);
97f8d3b6 1427 subs->running = 0;
edcd3633
DM		 1428 return 0;
1429 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1430 subs->data_endpoint->retire_data_urb = NULL;
97f8d3b6 1431 subs->running = 0;
edcd3633
DM		 1432 return 0;
1433 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1434 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1435 subs->running = 1;
edcd3633
DM		 1436 return 0;
1437 }
1438
1439 return -EINVAL;
1440}
1441
e5779998
DM		 1442static struct snd_pcm_ops snd_usb_playback_ops = {
1443 .open = snd_usb_playback_open,
1444 .close = snd_usb_playback_close,
1445 .ioctl = snd_pcm_lib_ioctl,
1446 .hw_params = snd_usb_hw_params,
1447 .hw_free = snd_usb_hw_free,
1448 .prepare = snd_usb_pcm_prepare,
1449 .trigger = snd_usb_substream_playback_trigger,
1450 .pointer = snd_usb_pcm_pointer,
1451 .page = snd_pcm_lib_get_vmalloc_page,
1452 .mmap = snd_pcm_lib_mmap_vmalloc,
1453};
1454
1455static struct snd_pcm_ops snd_usb_capture_ops = {
1456 .open = snd_usb_capture_open,
1457 .close = snd_usb_capture_close,
1458 .ioctl = snd_pcm_lib_ioctl,
1459 .hw_params = snd_usb_hw_params,
1460 .hw_free = snd_usb_hw_free,
1461 .prepare = snd_usb_pcm_prepare,
1462 .trigger = snd_usb_substream_capture_trigger,
1463 .pointer = snd_usb_pcm_pointer,
1464 .page = snd_pcm_lib_get_vmalloc_page,
1465 .mmap = snd_pcm_lib_mmap_vmalloc,
1466};
1467
1468void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1469{
1470 snd_pcm_set_ops(pcm, stream,
1471 stream == SNDRV_PCM_STREAM_PLAYBACK ?
1472 &snd_usb_playback_ops : &snd_usb_capture_ops);
1473}
Linux kernel - Deliverables
This page took 0.165757 seconds and 5 git commands to generate.