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ALSA: usb-audio: work around corrupted TEAC UD-H01 feedback data
[mirror_ubuntu-artful-kernel.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>
44dcbbb1 19#include <linux/bitrev.h>
edcd3633 20#include <linux/ratelimit.h>
e5779998
DM		 21#include <linux/usb.h>
22#include <linux/usb/audio.h>
7e847894 23#include <linux/usb/audio-v2.h>
e5779998
DM		 24
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28
29#include "usbaudio.h"
30#include "card.h"
31#include "quirks.h"
32#include "debug.h"
c731bc96 33#include "endpoint.h"
e5779998
DM		 34#include "helper.h"
35#include "pcm.h"
79f920fb 36#include "clock.h"
88a8516a 37#include "power.h"
e5779998 38
edcd3633
DM		 39#define SUBSTREAM_FLAG_DATA_EP_STARTED 0
40#define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
41
294c4fb8
PLB		 42/* return the estimated delay based on USB frame counters */
43snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
44 unsigned int rate)
45{
46 int current_frame_number;
47 int frame_diff;
48 int est_delay;
49
48779a0b
TI		 50 if (!subs->last_delay)
51 return 0; /* short path */
52
294c4fb8
PLB		 53 current_frame_number = usb_get_current_frame_number(subs->dev);
54 /*
55 * HCD implementations use different widths, use lower 8 bits.
56 * The delay will be managed up to 256ms, which is more than
57 * enough
58 */
59 frame_diff = (current_frame_number - subs->last_frame_number) & 0xff;
60
61 /* Approximation based on number of samples per USB frame (ms),
62 some truncation for 44.1 but the estimate is good enough */
e4cc6153
PLB		 63 est_delay = frame_diff * rate / 1000;
64 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
65 est_delay = subs->last_delay - est_delay;
66 else
67 est_delay = subs->last_delay + est_delay;
68
294c4fb8
PLB		 69 if (est_delay < 0)
70 est_delay = 0;
71 return est_delay;
72}
73
e5779998
DM		 74/*
75 * return the current pcm pointer. just based on the hwptr_done value.
76 */
77static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
78{
79 struct snd_usb_substream *subs;
80 unsigned int hwptr_done;
81
82 subs = (struct snd_usb_substream *)substream->runtime->private_data;
978520b7
TI		 83 if (subs->stream->chip->shutdown)
84 return SNDRV_PCM_POS_XRUN;
e5779998
DM		 85 spin_lock(&subs->lock);
86 hwptr_done = subs->hwptr_done;
e4cc6153 87 substream->runtime->delay = snd_usb_pcm_delay(subs,
294c4fb8 88 substream->runtime->rate);
e5779998
DM		 89 spin_unlock(&subs->lock);
90 return hwptr_done / (substream->runtime->frame_bits >> 3);
91}
92
93/*
94 * find a matching audio format
95 */
61a70950 96static struct audioformat *find_format(struct snd_usb_substream *subs)
e5779998 97{
88766f04 98 struct audioformat *fp;
e5779998
DM		 99 struct audioformat *found = NULL;
100 int cur_attr = 0, attr;
101
88766f04 102 list_for_each_entry(fp, &subs->fmt_list, list) {
74c34ca1 103 if (!(fp->formats & pcm_format_to_bits(subs->pcm_format)))
015eb0b0 104 continue;
61a70950 105 if (fp->channels != subs->channels)
e5779998 106 continue;
61a70950
DR		 107 if (subs->cur_rate < fp->rate_min ||
108 subs->cur_rate > fp->rate_max)
e5779998
DM		 109 continue;
110 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
111 unsigned int i;
112 for (i = 0; i < fp->nr_rates; i++)
61a70950 113 if (fp->rate_table[i] == subs->cur_rate)
e5779998
DM		 114 break;
115 if (i >= fp->nr_rates)
116 continue;
117 }
118 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
119 if (! found) {
120 found = fp;
121 cur_attr = attr;
122 continue;
123 }
124 /* avoid async out and adaptive in if the other method
125 * supports the same format.
126 * this is a workaround for the case like
127 * M-audio audiophile USB.
128 */
129 if (attr != cur_attr) {
130 if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
131 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
132 (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
133 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
134 continue;
135 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
136 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
137 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
138 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
139 found = fp;
140 cur_attr = attr;
141 continue;
142 }
143 }
144 /* find the format with the largest max. packet size */
145 if (fp->maxpacksize > found->maxpacksize) {
146 found = fp;
147 cur_attr = attr;
148 }
149 }
150 return found;
151}
152
767d75ad
DM		 153static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
154 struct usb_host_interface *alts,
155 struct audioformat *fmt)
156{
157 struct usb_device *dev = chip->dev;
158 unsigned int ep;
159 unsigned char data[1];
160 int err;
161
162 ep = get_endpoint(alts, 0)->bEndpointAddress;
163
767d75ad
DM		 164 data[0] = 1;
165 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
166 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
167 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
17d900c4 168 data, sizeof(data))) < 0) {
0ba41d91
TI		 169 usb_audio_err(chip, "%d:%d: cannot set enable PITCH\n",
170 iface, ep);
767d75ad
DM		 171 return err;
172 }
173
174 return 0;
175}
e5779998 176
92c25611
DM		 177static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
178 struct usb_host_interface *alts,
179 struct audioformat *fmt)
180{
181 struct usb_device *dev = chip->dev;
182 unsigned char data[1];
92c25611
DM		 183 int err;
184
92c25611
DM		 185 data[0] = 1;
186 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
187 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
188 UAC2_EP_CS_PITCH << 8, 0,
17d900c4 189 data, sizeof(data))) < 0) {
0ba41d91
TI		 190 usb_audio_err(chip, "%d:%d: cannot set enable PITCH (v2)\n",
191 iface, fmt->altsetting);
92c25611
DM		 192 return err;
193 }
194
195 return 0;
196}
197
e5779998 198/*
92c25611 199 * initialize the pitch control and sample rate
e5779998 200 */
767d75ad 201int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
e5779998
DM		 202 struct usb_host_interface *alts,
203 struct audioformat *fmt)
204{
92c25611
DM		 205 /* if endpoint doesn't have pitch control, bail out */
206 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
207 return 0;
208
8f898e92 209 switch (fmt->protocol) {
767d75ad 210 case UAC_VERSION_1:
a2acad82 211 default:
767d75ad
DM		 212 return init_pitch_v1(chip, iface, alts, fmt);
213
214 case UAC_VERSION_2:
92c25611 215 return init_pitch_v2(chip, iface, alts, fmt);
767d75ad 216 }
767d75ad
DM		 217}
218
a9bb3626 219static int start_endpoints(struct snd_usb_substream *subs, bool can_sleep)
edcd3633
DM		 220{
221 int err;
222
223 if (!subs->data_endpoint)
224 return -EINVAL;
225
226 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
227 struct snd_usb_endpoint *ep = subs->data_endpoint;
228
0ba41d91 229 dev_dbg(&subs->dev->dev, "Starting data EP @%p\n", ep);
edcd3633
DM		 230
231 ep->data_subs = subs;
015618b9 232 err = snd_usb_endpoint_start(ep, can_sleep);
edcd3633
DM		 233 if (err < 0) {
234 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
235 return err;
236 }
237 }
238
239 if (subs->sync_endpoint &&
240 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
241 struct snd_usb_endpoint *ep = subs->sync_endpoint;
242
2e4a263c 243 if (subs->data_endpoint->iface != subs->sync_endpoint->iface ||
df23a246 244 subs->data_endpoint->altsetting != subs->sync_endpoint->altsetting) {
2e4a263c
DM		 245 err = usb_set_interface(subs->dev,
246 subs->sync_endpoint->iface,
df23a246 247 subs->sync_endpoint->altsetting);
2e4a263c 248 if (err < 0) {
06613f54 249 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
0ba41d91
TI		 250 dev_err(&subs->dev->dev,
251 "%d:%d: cannot set interface (%d)\n",
2e4a263c 252 subs->sync_endpoint->iface,
df23a246 253 subs->sync_endpoint->altsetting, err);
2e4a263c
DM		 254 return -EIO;
255 }
256 }
257
0ba41d91 258 dev_dbg(&subs->dev->dev, "Starting sync EP @%p\n", ep);
edcd3633
DM		 259
260 ep->sync_slave = subs->data_endpoint;
015618b9 261 err = snd_usb_endpoint_start(ep, can_sleep);
edcd3633
DM		 262 if (err < 0) {
263 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
264 return err;
265 }
266 }
267
268 return 0;
269}
270
a9bb3626 271static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
edcd3633
DM		 272{
273 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
b2eb950d 274 snd_usb_endpoint_stop(subs->sync_endpoint);
edcd3633
DM		 275
276 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
b2eb950d
TI		 277 snd_usb_endpoint_stop(subs->data_endpoint);
278
279 if (wait) {
280 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
281 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
282 }
edcd3633
DM		 283}
284
ba7c2be1
CL		 285static int search_roland_implicit_fb(struct usb_device *dev, int ifnum,
286 unsigned int altsetting,
287 struct usb_host_interface **alts,
288 unsigned int *ep)
289{
290 struct usb_interface *iface;
291 struct usb_interface_descriptor *altsd;
292 struct usb_endpoint_descriptor *epd;
293
294 iface = usb_ifnum_to_if(dev, ifnum);
295 if (!iface || iface->num_altsetting < altsetting + 1)
296 return -ENOENT;
297 *alts = &iface->altsetting[altsetting];
298 altsd = get_iface_desc(*alts);
299 if (altsd->bAlternateSetting != altsetting ||
300 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC ||
301 (altsd->bInterfaceSubClass != 2 &&
302 altsd->bInterfaceProtocol != 2 ) ||
303 altsd->bNumEndpoints < 1)
304 return -ENOENT;
305 epd = get_endpoint(*alts, 0);
306 if (!usb_endpoint_is_isoc_in(epd) ||
307 (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
308 USB_ENDPOINT_USAGE_IMPLICIT_FB)
309 return -ENOENT;
310 *ep = epd->bEndpointAddress;
311 return 0;
312}
313
a60945fd
EZ		 314static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
315 struct usb_device *dev,
316 struct usb_interface_descriptor *altsd,
317 unsigned int attr)
e5779998 318{
a60945fd 319 struct usb_host_interface *alts;
e5779998 320 struct usb_interface *iface;
a60945fd 321 unsigned int ep;
c75a8a7a 322
914273c7
EZ		 323 /* Implicit feedback sync EPs consumers are always playback EPs */
324 if (subs->direction != SNDRV_PCM_STREAM_PLAYBACK)
325 return 0;
326
c75a8a7a 327 switch (subs->stream->chip->usb_id) {
ca10a7eb 328 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
e9a25e04 329 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
914273c7
EZ		 330 ep = 0x81;
331 iface = usb_ifnum_to_if(dev, 3);
ca10a7eb 332
914273c7
EZ		 333 if (!iface || iface->num_altsetting == 0)
334 return -EINVAL;
ca10a7eb 335
914273c7
EZ		 336 alts = &iface->altsetting[1];
337 goto add_sync_ep;
ca10a7eb 338 break;
c75a8a7a
DM		 339 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
340 case USB_ID(0x0763, 0x2081):
914273c7
EZ		 341 ep = 0x81;
342 iface = usb_ifnum_to_if(dev, 2);
c75a8a7a 343
914273c7
EZ		 344 if (!iface || iface->num_altsetting == 0)
345 return -EINVAL;
c75a8a7a 346
914273c7
EZ		 347 alts = &iface->altsetting[1];
348 goto add_sync_ep;
c75a8a7a 349 }
914273c7 350 if (attr == USB_ENDPOINT_SYNC_ASYNC &&
ba7c2be1
CL		 351 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
352 altsd->bInterfaceProtocol == 2 &&
353 altsd->bNumEndpoints == 1 &&
354 USB_ID_VENDOR(subs->stream->chip->usb_id) == 0x0582 /* Roland */ &&
355 search_roland_implicit_fb(dev, altsd->bInterfaceNumber + 1,
356 altsd->bAlternateSetting,
357 &alts, &ep) >= 0) {
ba7c2be1
CL		 358 goto add_sync_ep;
359 }
edcd3633 360
a60945fd
EZ		 361 /* No quirk */
362 return 0;
363
364add_sync_ep:
365 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
366 alts, ep, !subs->direction,
88abb8ef 367 SND_USB_ENDPOINT_TYPE_DATA);
a60945fd
EZ		 368 if (!subs->sync_endpoint)
369 return -EINVAL;
370
371 subs->data_endpoint->sync_master = subs->sync_endpoint;
372
373 return 0;
374}
375
376static int set_sync_endpoint(struct snd_usb_substream *subs,
377 struct audioformat *fmt,
378 struct usb_device *dev,
379 struct usb_host_interface *alts,
380 struct usb_interface_descriptor *altsd)
381{
382 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
383 unsigned int ep, attr;
95fec883 384 bool implicit_fb;
a60945fd
EZ		 385 int err;
386
387 /* we need a sync pipe in async OUT or adaptive IN mode */
388 /* check the number of EP, since some devices have broken
389 * descriptors which fool us. if it has only one EP,
390 * assume it as adaptive-out or sync-in.
391 */
392 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
393
394 err = set_sync_ep_implicit_fb_quirk(subs, dev, altsd, attr);
395 if (err < 0)
396 return err;
397
f34d0650
EZ		 398 if (altsd->bNumEndpoints < 2)
399 return 0;
c75a8a7a 400
f34d0650
EZ		 401 if ((is_playback && attr != USB_ENDPOINT_SYNC_ASYNC) ||
402 (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE))
403 return 0;
edcd3633 404
f34d0650
EZ		 405 /* check sync-pipe endpoint */
406 /* ... and check descriptor size before accessing bSynchAddress
407 because there is a version of the SB Audigy 2 NX firmware lacking
408 the audio fields in the endpoint descriptors */
409 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
410 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
95fec883 411 get_endpoint(alts, 1)->bSynchAddress != 0)) {
0ba41d91
TI		 412 dev_err(&dev->dev,
413 "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
414 fmt->iface, fmt->altsetting,
f34d0650
EZ		 415 get_endpoint(alts, 1)->bmAttributes,
416 get_endpoint(alts, 1)->bLength,
417 get_endpoint(alts, 1)->bSynchAddress);
418 return -EINVAL;
419 }
420 ep = get_endpoint(alts, 1)->bEndpointAddress;
95fec883 421 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
f34d0650
EZ		 422 ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
423 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
0ba41d91
TI		 424 dev_err(&dev->dev,
425 "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
426 fmt->iface, fmt->altsetting,
f34d0650
EZ		 427 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
428 return -EINVAL;
edcd3633 429 }
e5779998 430
f34d0650
EZ		 431 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
432 == USB_ENDPOINT_USAGE_IMPLICIT_FB;
433
434 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
435 alts, ep, !subs->direction,
436 implicit_fb ?
437 SND_USB_ENDPOINT_TYPE_DATA :
438 SND_USB_ENDPOINT_TYPE_SYNC);
439 if (!subs->sync_endpoint)
440 return -EINVAL;
441
442 subs->data_endpoint->sync_master = subs->sync_endpoint;
443
71bb64c5
EZ		 444 return 0;
445}
446
447/*
448 * find a matching format and set up the interface
449 */
450static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
451{
452 struct usb_device *dev = subs->dev;
453 struct usb_host_interface *alts;
454 struct usb_interface_descriptor *altsd;
455 struct usb_interface *iface;
456 int err;
457
458 iface = usb_ifnum_to_if(dev, fmt->iface);
459 if (WARN_ON(!iface))
460 return -EINVAL;
461 alts = &iface->altsetting[fmt->altset_idx];
462 altsd = get_iface_desc(alts);
463 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
464 return -EINVAL;
465
466 if (fmt == subs->cur_audiofmt)
467 return 0;
468
469 /* close the old interface */
470 if (subs->interface >= 0 && subs->interface != fmt->iface) {
471 err = usb_set_interface(subs->dev, subs->interface, 0);
472 if (err < 0) {
0ba41d91
TI		 473 dev_err(&dev->dev,
474 "%d:%d: return to setting 0 failed (%d)\n",
475 fmt->iface, fmt->altsetting, err);
71bb64c5
EZ		 476 return -EIO;
477 }
478 subs->interface = -1;
479 subs->altset_idx = 0;
480 }
481
482 /* set interface */
483 if (subs->interface != fmt->iface ||
484 subs->altset_idx != fmt->altset_idx) {
485 err = usb_set_interface(dev, fmt->iface, fmt->altsetting);
486 if (err < 0) {
0ba41d91
TI		 487 dev_err(&dev->dev,
488 "%d:%d: usb_set_interface failed (%d)\n",
489 fmt->iface, fmt->altsetting, err);
71bb64c5
EZ		 490 return -EIO;
491 }
0ba41d91
TI		 492 dev_dbg(&dev->dev, "setting usb interface %d:%d\n",
493 fmt->iface, fmt->altsetting);
71bb64c5
EZ		 494 subs->interface = fmt->iface;
495 subs->altset_idx = fmt->altset_idx;
496
497 snd_usb_set_interface_quirk(dev);
498 }
499
500 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
501 alts, fmt->endpoint, subs->direction,
502 SND_USB_ENDPOINT_TYPE_DATA);
503
504 if (!subs->data_endpoint)
505 return -EINVAL;
506
507 err = set_sync_endpoint(subs, fmt, dev, alts, altsd);
508 if (err < 0)
509 return err;
510
d133f2c2
EZ		 511 err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt);
512 if (err < 0)
e5779998
DM		 513 return err;
514
515 subs->cur_audiofmt = fmt;
516
517 snd_usb_set_format_quirk(subs, fmt);
518
e5779998
DM		 519 return 0;
520}
521
0d9741c0
EZ		 522/*
523 * Return the score of matching two audioformats.
524 * Veto the audioformat if:
525 * - It has no channels for some reason.
526 * - Requested PCM format is not supported.
527 * - Requested sample rate is not supported.
528 */
0ba41d91
TI		 529static int match_endpoint_audioformats(struct snd_usb_substream *subs,
530 struct audioformat *fp,
531 struct audioformat *match, int rate,
532 snd_pcm_format_t pcm_format)
0d9741c0
EZ		 533{
534 int i;
535 int score = 0;
536
537 if (fp->channels < 1) {
0ba41d91
TI		 538 dev_dbg(&subs->dev->dev,
539 "%s: (fmt @%p) no channels\n", __func__, fp);
0d9741c0
EZ		 540 return 0;
541 }
542
74c34ca1 543 if (!(fp->formats & pcm_format_to_bits(pcm_format))) {
0ba41d91
TI		 544 dev_dbg(&subs->dev->dev,
545 "%s: (fmt @%p) no match for format %d\n", __func__,
0d9741c0
EZ		 546 fp, pcm_format);
547 return 0;
548 }
549
550 for (i = 0; i < fp->nr_rates; i++) {
551 if (fp->rate_table[i] == rate) {
552 score++;
553 break;
554 }
555 }
556 if (!score) {
0ba41d91
TI		 557 dev_dbg(&subs->dev->dev,
558 "%s: (fmt @%p) no match for rate %d\n", __func__,
0d9741c0
EZ		 559 fp, rate);
560 return 0;
561 }
562
563 if (fp->channels == match->channels)
564 score++;
565
0ba41d91
TI		 566 dev_dbg(&subs->dev->dev,
567 "%s: (fmt @%p) score %d\n", __func__, fp, score);
0d9741c0
EZ		 568
569 return score;
570}
571
572/*
573 * Configure the sync ep using the rate and pcm format of the data ep.
574 */
575static int configure_sync_endpoint(struct snd_usb_substream *subs)
576{
577 int ret;
578 struct audioformat *fp;
579 struct audioformat *sync_fp = NULL;
580 int cur_score = 0;
581 int sync_period_bytes = subs->period_bytes;
582 struct snd_usb_substream *sync_subs =
583 &subs->stream->substream[subs->direction ^ 1];
584
31be5425
TI		 585 if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA ||
586 !subs->stream)
587 return snd_usb_endpoint_set_params(subs->sync_endpoint,
588 subs->pcm_format,
589 subs->channels,
590 subs->period_bytes,
976b6c06 591 0, 0,
31be5425
TI		 592 subs->cur_rate,
593 subs->cur_audiofmt,
594 NULL);
595
0d9741c0
EZ		 596 /* Try to find the best matching audioformat. */
597 list_for_each_entry(fp, &sync_subs->fmt_list, list) {
0ba41d91
TI		 598 int score = match_endpoint_audioformats(subs,
599 fp, subs->cur_audiofmt,
0d9741c0
EZ		 600 subs->cur_rate, subs->pcm_format);
601
602 if (score > cur_score) {
603 sync_fp = fp;
604 cur_score = score;
605 }
606 }
607
608 if (unlikely(sync_fp == NULL)) {
0ba41d91
TI		 609 dev_err(&subs->dev->dev,
610 "%s: no valid audioformat for sync ep %x found\n",
0d9741c0
EZ		 611 __func__, sync_subs->ep_num);
612 return -EINVAL;
613 }
614
615 /*
616 * Recalculate the period bytes if channel number differ between
617 * data and sync ep audioformat.
618 */
619 if (sync_fp->channels != subs->channels) {
620 sync_period_bytes = (subs->period_bytes / subs->channels) *
621 sync_fp->channels;
0ba41d91
TI		 622 dev_dbg(&subs->dev->dev,
623 "%s: adjusted sync ep period bytes (%d -> %d)\n",
0d9741c0
EZ		 624 __func__, subs->period_bytes, sync_period_bytes);
625 }
626
627 ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
628 subs->pcm_format,
629 sync_fp->channels,
630 sync_period_bytes,
976b6c06 631 0, 0,
0d9741c0
EZ		 632 subs->cur_rate,
633 sync_fp,
634 NULL);
635
636 return ret;
637}
638
61a70950
DR		 639/*
640 * configure endpoint params
641 *
642 * called during initial setup and upon resume
643 */
644static int configure_endpoint(struct snd_usb_substream *subs)
645{
646 int ret;
647
61a70950 648 /* format changed */
b0db6063 649 stop_endpoints(subs, true);
61a70950
DR		 650 ret = snd_usb_endpoint_set_params(subs->data_endpoint,
651 subs->pcm_format,
652 subs->channels,
653 subs->period_bytes,
976b6c06
AS		 654 subs->period_frames,
655 subs->buffer_periods,
61a70950
DR		 656 subs->cur_rate,
657 subs->cur_audiofmt,
658 subs->sync_endpoint);
659 if (ret < 0)
978520b7 660 return ret;
61a70950
DR		 661
662 if (subs->sync_endpoint)
0d9741c0
EZ		 663 ret = configure_sync_endpoint(subs);
664
61a70950
DR		 665 return ret;
666}
667
e5779998
DM		 668/*
669 * hw_params callback
670 *
671 * allocate a buffer and set the given audio format.
672 *
673 * so far we use a physically linear buffer although packetize transfer
674 * doesn't need a continuous area.
675 * if sg buffer is supported on the later version of alsa, we'll follow
676 * that.
677 */
678static int snd_usb_hw_params(struct snd_pcm_substream *substream,
679 struct snd_pcm_hw_params *hw_params)
680{
681 struct snd_usb_substream *subs = substream->runtime->private_data;
682 struct audioformat *fmt;
61a70950 683 int ret;
e5779998
DM		 684
685 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
686 params_buffer_bytes(hw_params));
687 if (ret < 0)
688 return ret;
689
61a70950
DR		 690 subs->pcm_format = params_format(hw_params);
691 subs->period_bytes = params_period_bytes(hw_params);
976b6c06
AS		 692 subs->period_frames = params_period_size(hw_params);
693 subs->buffer_periods = params_periods(hw_params);
61a70950
DR		 694 subs->channels = params_channels(hw_params);
695 subs->cur_rate = params_rate(hw_params);
696
697 fmt = find_format(subs);
e5779998 698 if (!fmt) {
0ba41d91
TI		 699 dev_dbg(&subs->dev->dev,
700 "cannot set format: format = %#x, rate = %d, channels = %d\n",
61a70950 701 subs->pcm_format, subs->cur_rate, subs->channels);
e5779998
DM		 702 return -EINVAL;
703 }
704
34f3c89f 705 down_read(&subs->stream->chip->shutdown_rwsem);
978520b7
TI		 706 if (subs->stream->chip->shutdown)
707 ret = -ENODEV;
708 else
709 ret = set_format(subs, fmt);
34f3c89f 710 up_read(&subs->stream->chip->shutdown_rwsem);
978520b7 711 if (ret < 0)
e5779998
DM		 712 return ret;
713
61a70950
DR		 714 subs->interface = fmt->iface;
715 subs->altset_idx = fmt->altset_idx;
384dc085 716 subs->need_setup_ep = true;
715a1705 717
61a70950 718 return 0;
e5779998
DM		 719}
720
721/*
722 * hw_free callback
723 *
724 * reset the audio format and release the buffer
725 */
726static int snd_usb_hw_free(struct snd_pcm_substream *substream)
727{
728 struct snd_usb_substream *subs = substream->runtime->private_data;
729
730 subs->cur_audiofmt = NULL;
731 subs->cur_rate = 0;
732 subs->period_bytes = 0;
34f3c89f 733 down_read(&subs->stream->chip->shutdown_rwsem);
978520b7 734 if (!subs->stream->chip->shutdown) {
a9bb3626 735 stop_endpoints(subs, true);
26de5d0a
EZ		 736 snd_usb_endpoint_deactivate(subs->sync_endpoint);
737 snd_usb_endpoint_deactivate(subs->data_endpoint);
978520b7 738 }
34f3c89f 739 up_read(&subs->stream->chip->shutdown_rwsem);
e5779998
DM		 740 return snd_pcm_lib_free_vmalloc_buffer(substream);
741}
742
743/*
744 * prepare callback
745 *
746 * only a few subtle things...
747 */
748static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
749{
750 struct snd_pcm_runtime *runtime = substream->runtime;
751 struct snd_usb_substream *subs = runtime->private_data;
61a70950
DR		 752 struct usb_host_interface *alts;
753 struct usb_interface *iface;
754 int ret;
e5779998
DM		 755
756 if (! subs->cur_audiofmt) {
0ba41d91 757 dev_err(&subs->dev->dev, "no format is specified!\n");
e5779998
DM		 758 return -ENXIO;
759 }
760
34f3c89f 761 down_read(&subs->stream->chip->shutdown_rwsem);
978520b7
TI		 762 if (subs->stream->chip->shutdown) {
763 ret = -ENODEV;
764 goto unlock;
765 }
766 if (snd_BUG_ON(!subs->data_endpoint)) {
767 ret = -EIO;
768 goto unlock;
769 }
edcd3633 770
f58161ba
TI		 771 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
772 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
773
61a70950
DR		 774 ret = set_format(subs, subs->cur_audiofmt);
775 if (ret < 0)
978520b7 776 goto unlock;
61a70950
DR		 777
778 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface);
779 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx];
780 ret = snd_usb_init_sample_rate(subs->stream->chip,
781 subs->cur_audiofmt->iface,
782 alts,
783 subs->cur_audiofmt,
784 subs->cur_rate);
785 if (ret < 0)
978520b7 786 goto unlock;
61a70950 787
384dc085
TI		 788 if (subs->need_setup_ep) {
789 ret = configure_endpoint(subs);
790 if (ret < 0)
978520b7 791 goto unlock;
384dc085
TI		 792 subs->need_setup_ep = false;
793 }
61a70950 794
e5779998 795 /* some unit conversions in runtime */
edcd3633
DM		 796 subs->data_endpoint->maxframesize =
797 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
798 subs->data_endpoint->curframesize =
799 bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
e5779998
DM		 800
801 /* reset the pointer */
802 subs->hwptr_done = 0;
803 subs->transfer_done = 0;
294c4fb8
PLB		 804 subs->last_delay = 0;
805 subs->last_frame_number = 0;
e5779998
DM		 806 runtime->delay = 0;
807
edcd3633
DM		 808 /* for playback, submit the URBs now; otherwise, the first hwptr_done
809 * updates for all URBs would happen at the same time when starting */
810 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
a9bb3626 811 ret = start_endpoints(subs, true);
edcd3633 812
978520b7 813 unlock:
34f3c89f 814 up_read(&subs->stream->chip->shutdown_rwsem);
978520b7 815 return ret;
e5779998
DM		 816}
817
818static struct snd_pcm_hardware snd_usb_hardware =
819{
820 .info = SNDRV_PCM_INFO_MMAP |
821 SNDRV_PCM_INFO_MMAP_VALID |
822 SNDRV_PCM_INFO_BATCH |
823 SNDRV_PCM_INFO_INTERLEAVED |
824 SNDRV_PCM_INFO_BLOCK_TRANSFER |
825 SNDRV_PCM_INFO_PAUSE,
826 .buffer_bytes_max = 1024 * 1024,
827 .period_bytes_min = 64,
828 .period_bytes_max = 512 * 1024,
829 .periods_min = 2,
830 .periods_max = 1024,
831};
832
833static int hw_check_valid_format(struct snd_usb_substream *subs,
834 struct snd_pcm_hw_params *params,
835 struct audioformat *fp)
836{
837 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
838 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
839 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
840 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
015eb0b0 841 struct snd_mask check_fmts;
e5779998
DM		 842 unsigned int ptime;
843
844 /* check the format */
015eb0b0
CL		 845 snd_mask_none(&check_fmts);
846 check_fmts.bits[0] = (u32)fp->formats;
847 check_fmts.bits[1] = (u32)(fp->formats >> 32);
848 snd_mask_intersect(&check_fmts, fmts);
849 if (snd_mask_empty(&check_fmts)) {
e5779998
DM		 850 hwc_debug(" > check: no supported format %d\n", fp->format);
851 return 0;
852 }
853 /* check the channels */
854 if (fp->channels < ct->min || fp->channels > ct->max) {
855 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
856 return 0;
857 }
858 /* check the rate is within the range */
859 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
860 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
861 return 0;
862 }
863 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
864 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
865 return 0;
866 }
867 /* check whether the period time is >= the data packet interval */
978520b7 868 if (subs->speed != USB_SPEED_FULL) {
e5779998
DM		 869 ptime = 125 * (1 << fp->datainterval);
870 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
871 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
872 return 0;
873 }
874 }
875 return 1;
876}
877
878static int hw_rule_rate(struct snd_pcm_hw_params *params,
879 struct snd_pcm_hw_rule *rule)
880{
881 struct snd_usb_substream *subs = rule->private;
88766f04 882 struct audioformat *fp;
e5779998
DM		 883 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
884 unsigned int rmin, rmax;
885 int changed;
886
887 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
888 changed = 0;
889 rmin = rmax = 0;
88766f04 890 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 891 if (!hw_check_valid_format(subs, params, fp))
892 continue;
893 if (changed++) {
894 if (rmin > fp->rate_min)
895 rmin = fp->rate_min;
896 if (rmax < fp->rate_max)
897 rmax = fp->rate_max;
898 } else {
899 rmin = fp->rate_min;
900 rmax = fp->rate_max;
901 }
902 }
903
904 if (!changed) {
905 hwc_debug(" --> get empty\n");
906 it->empty = 1;
907 return -EINVAL;
908 }
909
910 changed = 0;
911 if (it->min < rmin) {
912 it->min = rmin;
913 it->openmin = 0;
914 changed = 1;
915 }
916 if (it->max > rmax) {
917 it->max = rmax;
918 it->openmax = 0;
919 changed = 1;
920 }
921 if (snd_interval_checkempty(it)) {
922 it->empty = 1;
923 return -EINVAL;
924 }
925 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
926 return changed;
927}
928
929
930static int hw_rule_channels(struct snd_pcm_hw_params *params,
931 struct snd_pcm_hw_rule *rule)
932{
933 struct snd_usb_substream *subs = rule->private;
88766f04 934 struct audioformat *fp;
e5779998
DM		 935 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
936 unsigned int rmin, rmax;
937 int changed;
938
939 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
940 changed = 0;
941 rmin = rmax = 0;
88766f04 942 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 943 if (!hw_check_valid_format(subs, params, fp))
944 continue;
945 if (changed++) {
946 if (rmin > fp->channels)
947 rmin = fp->channels;
948 if (rmax < fp->channels)
949 rmax = fp->channels;
950 } else {
951 rmin = fp->channels;
952 rmax = fp->channels;
953 }
954 }
955
956 if (!changed) {
957 hwc_debug(" --> get empty\n");
958 it->empty = 1;
959 return -EINVAL;
960 }
961
962 changed = 0;
963 if (it->min < rmin) {
964 it->min = rmin;
965 it->openmin = 0;
966 changed = 1;
967 }
968 if (it->max > rmax) {
969 it->max = rmax;
970 it->openmax = 0;
971 changed = 1;
972 }
973 if (snd_interval_checkempty(it)) {
974 it->empty = 1;
975 return -EINVAL;
976 }
977 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
978 return changed;
979}
980
981static int hw_rule_format(struct snd_pcm_hw_params *params,
982 struct snd_pcm_hw_rule *rule)
983{
984 struct snd_usb_substream *subs = rule->private;
88766f04 985 struct audioformat *fp;
e5779998
DM		 986 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
987 u64 fbits;
988 u32 oldbits[2];
989 int changed;
990
991 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
992 fbits = 0;
88766f04 993 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 994 if (!hw_check_valid_format(subs, params, fp))
995 continue;
015eb0b0 996 fbits |= fp->formats;
e5779998
DM		 997 }
998
999 oldbits[0] = fmt->bits[0];
1000 oldbits[1] = fmt->bits[1];
1001 fmt->bits[0] &= (u32)fbits;
1002 fmt->bits[1] &= (u32)(fbits >> 32);
1003 if (!fmt->bits[0] && !fmt->bits[1]) {
1004 hwc_debug(" --> get empty\n");
1005 return -EINVAL;
1006 }
1007 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1008 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1009 return changed;
1010}
1011
1012static int hw_rule_period_time(struct snd_pcm_hw_params *params,
1013 struct snd_pcm_hw_rule *rule)
1014{
1015 struct snd_usb_substream *subs = rule->private;
1016 struct audioformat *fp;
1017 struct snd_interval *it;
1018 unsigned char min_datainterval;
1019 unsigned int pmin;
1020 int changed;
1021
1022 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
1023 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
1024 min_datainterval = 0xff;
1025 list_for_each_entry(fp, &subs->fmt_list, list) {
1026 if (!hw_check_valid_format(subs, params, fp))
1027 continue;
1028 min_datainterval = min(min_datainterval, fp->datainterval);
1029 }
1030 if (min_datainterval == 0xff) {
a7ce2e0d 1031 hwc_debug(" --> get empty\n");
e5779998
DM		 1032 it->empty = 1;
1033 return -EINVAL;
1034 }
1035 pmin = 125 * (1 << min_datainterval);
1036 changed = 0;
1037 if (it->min < pmin) {
1038 it->min = pmin;
1039 it->openmin = 0;
1040 changed = 1;
1041 }
1042 if (snd_interval_checkempty(it)) {
1043 it->empty = 1;
1044 return -EINVAL;
1045 }
1046 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
1047 return changed;
1048}
1049
1050/*
1051 * If the device supports unusual bit rates, does the request meet these?
1052 */
1053static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1054 struct snd_usb_substream *subs)
1055{
1056 struct audioformat *fp;
0717d0f5 1057 int *rate_list;
e5779998
DM		 1058 int count = 0, needs_knot = 0;
1059 int err;
1060
5cd5d7c4
CL		 1061 kfree(subs->rate_list.list);
1062 subs->rate_list.list = NULL;
1063
e5779998
DM		 1064 list_for_each_entry(fp, &subs->fmt_list, list) {
1065 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1066 return 0;
1067 count += fp->nr_rates;
1068 if (fp->rates & SNDRV_PCM_RATE_KNOT)
1069 needs_knot = 1;
1070 }
1071 if (!needs_knot)
1072 return 0;
1073
0717d0f5
TI		 1074 subs->rate_list.list = rate_list =
1075 kmalloc(sizeof(int) * count, GFP_KERNEL);
8a8d56b2
JJ		 1076 if (!subs->rate_list.list)
1077 return -ENOMEM;
1078 subs->rate_list.count = count;
e5779998
DM		 1079 subs->rate_list.mask = 0;
1080 count = 0;
1081 list_for_each_entry(fp, &subs->fmt_list, list) {
1082 int i;
1083 for (i = 0; i < fp->nr_rates; i++)
0717d0f5 1084 rate_list[count++] = fp->rate_table[i];
e5779998
DM		 1085 }
1086 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1087 &subs->rate_list);
1088 if (err < 0)
1089 return err;
1090
1091 return 0;
1092}
1093
1094
1095/*
1096 * set up the runtime hardware information.
1097 */
1098
1099static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1100{
88766f04 1101 struct audioformat *fp;
e5779998
DM		 1102 unsigned int pt, ptmin;
1103 int param_period_time_if_needed;
1104 int err;
1105
1106 runtime->hw.formats = subs->formats;
1107
1108 runtime->hw.rate_min = 0x7fffffff;
1109 runtime->hw.rate_max = 0;
1110 runtime->hw.channels_min = 256;
1111 runtime->hw.channels_max = 0;
1112 runtime->hw.rates = 0;
1113 ptmin = UINT_MAX;
1114 /* check min/max rates and channels */
88766f04 1115 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 1116 runtime->hw.rates |= fp->rates;
1117 if (runtime->hw.rate_min > fp->rate_min)
1118 runtime->hw.rate_min = fp->rate_min;
1119 if (runtime->hw.rate_max < fp->rate_max)
1120 runtime->hw.rate_max = fp->rate_max;
1121 if (runtime->hw.channels_min > fp->channels)
1122 runtime->hw.channels_min = fp->channels;
1123 if (runtime->hw.channels_max < fp->channels)
1124 runtime->hw.channels_max = fp->channels;
1125 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
1126 /* FIXME: there might be more than one audio formats... */
1127 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1128 fp->frame_size;
1129 }
1130 pt = 125 * (1 << fp->datainterval);
1131 ptmin = min(ptmin, pt);
1132 }
88a8516a
ON		 1133 err = snd_usb_autoresume(subs->stream->chip);
1134 if (err < 0)
1135 return err;
e5779998
DM		 1136
1137 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
978520b7 1138 if (subs->speed == USB_SPEED_FULL)
e5779998
DM		 1139 /* full speed devices have fixed data packet interval */
1140 ptmin = 1000;
1141 if (ptmin == 1000)
1142 /* if period time doesn't go below 1 ms, no rules needed */
1143 param_period_time_if_needed = -1;
1144 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1145 ptmin, UINT_MAX);
1146
1147 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1148 hw_rule_rate, subs,
1149 SNDRV_PCM_HW_PARAM_FORMAT,
1150 SNDRV_PCM_HW_PARAM_CHANNELS,
1151 param_period_time_if_needed,
1152 -1)) < 0)
88a8516a 1153 goto rep_err;
e5779998
DM		 1154 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1155 hw_rule_channels, subs,
1156 SNDRV_PCM_HW_PARAM_FORMAT,
1157 SNDRV_PCM_HW_PARAM_RATE,
1158 param_period_time_if_needed,
1159 -1)) < 0)
88a8516a 1160 goto rep_err;
e5779998
DM		 1161 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1162 hw_rule_format, subs,
1163 SNDRV_PCM_HW_PARAM_RATE,
1164 SNDRV_PCM_HW_PARAM_CHANNELS,
1165 param_period_time_if_needed,
1166 -1)) < 0)
88a8516a 1167 goto rep_err;
e5779998
DM		 1168 if (param_period_time_if_needed >= 0) {
1169 err = snd_pcm_hw_rule_add(runtime, 0,
1170 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1171 hw_rule_period_time, subs,
1172 SNDRV_PCM_HW_PARAM_FORMAT,
1173 SNDRV_PCM_HW_PARAM_CHANNELS,
1174 SNDRV_PCM_HW_PARAM_RATE,
1175 -1);
1176 if (err < 0)
88a8516a 1177 goto rep_err;
e5779998
DM		 1178 }
1179 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
88a8516a 1180 goto rep_err;
e5779998 1181 return 0;
88a8516a
ON		 1182
1183rep_err:
1184 snd_usb_autosuspend(subs->stream->chip);
1185 return err;
e5779998
DM		 1186}
1187
1188static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1189{
1190 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1191 struct snd_pcm_runtime *runtime = substream->runtime;
1192 struct snd_usb_substream *subs = &as->substream[direction];
1193
1194 subs->interface = -1;
e11b4e0e 1195 subs->altset_idx = 0;
e5779998
DM		 1196 runtime->hw = snd_usb_hardware;
1197 runtime->private_data = subs;
1198 subs->pcm_substream = substream;
88a8516a 1199 /* runtime PM is also done there */
d24f5061
DM		 1200
1201 /* initialize DSD/DOP context */
1202 subs->dsd_dop.byte_idx = 0;
1203 subs->dsd_dop.channel = 0;
1204 subs->dsd_dop.marker = 1;
1205
e5779998
DM		 1206 return setup_hw_info(runtime, subs);
1207}
1208
1209static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1210{
1211 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1212 struct snd_usb_substream *subs = &as->substream[direction];
1213
b0db6063 1214 stop_endpoints(subs, true);
68e67f40
DM		 1215
1216 if (!as->chip->shutdown && subs->interface >= 0) {
1217 usb_set_interface(subs->dev, subs->interface, 0);
1218 subs->interface = -1;
1219 }
1220
e5779998 1221 subs->pcm_substream = NULL;
88a8516a 1222 snd_usb_autosuspend(subs->stream->chip);
edcd3633 1223
68e67f40 1224 return 0;
edcd3633
DM		 1225}
1226
1227/* Since a URB can handle only a single linear buffer, we must use double
1228 * buffering when the data to be transferred overflows the buffer boundary.
1229 * To avoid inconsistencies when updating hwptr_done, we use double buffering
1230 * for all URBs.
1231 */
1232static void retire_capture_urb(struct snd_usb_substream *subs,
1233 struct urb *urb)
1234{
1235 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1236 unsigned int stride, frames, bytes, oldptr;
1237 int i, period_elapsed = 0;
1238 unsigned long flags;
1239 unsigned char *cp;
e4cc6153
PLB		 1240 int current_frame_number;
1241
1242 /* read frame number here, update pointer in critical section */
1243 current_frame_number = usb_get_current_frame_number(subs->dev);
edcd3633
DM		 1244
1245 stride = runtime->frame_bits >> 3;
1246
1247 for (i = 0; i < urb->number_of_packets; i++) {
1539d4f8 1248 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj;
edcd3633 1249 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
0ba41d91
TI		 1250 dev_dbg(&subs->dev->dev, "frame %d active: %d\n",
1251 i, urb->iso_frame_desc[i].status);
edcd3633
DM		 1252 // continue;
1253 }
1254 bytes = urb->iso_frame_desc[i].actual_length;
1255 frames = bytes / stride;
1256 if (!subs->txfr_quirk)
1257 bytes = frames * stride;
1258 if (bytes % (runtime->sample_bits >> 3) != 0) {
edcd3633 1259 int oldbytes = bytes;
edcd3633 1260 bytes = frames * stride;
0ba41d91
TI		 1261 dev_warn(&subs->dev->dev,
1262 "Corrected urb data len. %d->%d\n",
edcd3633
DM		 1263 oldbytes, bytes);
1264 }
1265 /* update the current pointer */
1266 spin_lock_irqsave(&subs->lock, flags);
1267 oldptr = subs->hwptr_done;
1268 subs->hwptr_done += bytes;
1269 if (subs->hwptr_done >= runtime->buffer_size * stride)
1270 subs->hwptr_done -= runtime->buffer_size * stride;
1271 frames = (bytes + (oldptr % stride)) / stride;
1272 subs->transfer_done += frames;
1273 if (subs->transfer_done >= runtime->period_size) {
1274 subs->transfer_done -= runtime->period_size;
1275 period_elapsed = 1;
1276 }
e4cc6153
PLB		 1277 /* capture delay is by construction limited to one URB,
1278 * reset delays here
1279 */
1280 runtime->delay = subs->last_delay = 0;
1281
1282 /* realign last_frame_number */
1283 subs->last_frame_number = current_frame_number;
1284 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1285
edcd3633
DM		 1286 spin_unlock_irqrestore(&subs->lock, flags);
1287 /* copy a data chunk */
1288 if (oldptr + bytes > runtime->buffer_size * stride) {
1289 unsigned int bytes1 =
1290 runtime->buffer_size * stride - oldptr;
1291 memcpy(runtime->dma_area + oldptr, cp, bytes1);
1292 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1293 } else {
1294 memcpy(runtime->dma_area + oldptr, cp, bytes);
1295 }
1296 }
1297
1298 if (period_elapsed)
1299 snd_pcm_period_elapsed(subs->pcm_substream);
1300}
1301
d24f5061
DM		 1302static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs,
1303 struct urb *urb, unsigned int bytes)
1304{
1305 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1306 unsigned int stride = runtime->frame_bits >> 3;
1307 unsigned int dst_idx = 0;
1308 unsigned int src_idx = subs->hwptr_done;
1309 unsigned int wrap = runtime->buffer_size * stride;
1310 u8 *dst = urb->transfer_buffer;
1311 u8 *src = runtime->dma_area;
1312 u8 marker[] = { 0x05, 0xfa };
1313
1314 /*
1315 * The DSP DOP format defines a way to transport DSD samples over
1316 * normal PCM data endpoints. It requires stuffing of marker bytes
1317 * (0x05 and 0xfa, alternating per sample frame), and then expects
1318 * 2 additional bytes of actual payload. The whole frame is stored
1319 * LSB.
1320 *
1321 * Hence, for a stereo transport, the buffer layout looks like this,
1322 * where L refers to left channel samples and R to right.
1323 *
1324 * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa
1325 * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa
1326 * .....
1327 *
1328 */
1329
1330 while (bytes--) {
1331 if (++subs->dsd_dop.byte_idx == 3) {
1332 /* frame boundary? */
1333 dst[dst_idx++] = marker[subs->dsd_dop.marker];
1334 src_idx += 2;
1335 subs->dsd_dop.byte_idx = 0;
1336
1337 if (++subs->dsd_dop.channel % runtime->channels == 0) {
1338 /* alternate the marker */
1339 subs->dsd_dop.marker++;
1340 subs->dsd_dop.marker %= ARRAY_SIZE(marker);
1341 subs->dsd_dop.channel = 0;
1342 }
1343 } else {
1344 /* stuff the DSD payload */
1345 int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap;
44dcbbb1
DM		 1346
1347 if (subs->cur_audiofmt->dsd_bitrev)
1348 dst[dst_idx++] = bitrev8(src[idx]);
1349 else
1350 dst[dst_idx++] = src[idx];
1351
d24f5061
DM		 1352 subs->hwptr_done++;
1353 }
1354 }
1355}
1356
edcd3633
DM		 1357static void prepare_playback_urb(struct snd_usb_substream *subs,
1358 struct urb *urb)
1359{
1360 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
245baf98 1361 struct snd_usb_endpoint *ep = subs->data_endpoint;
edcd3633
DM		 1362 struct snd_urb_ctx *ctx = urb->context;
1363 unsigned int counts, frames, bytes;
1364 int i, stride, period_elapsed = 0;
1365 unsigned long flags;
1366
1367 stride = runtime->frame_bits >> 3;
1368
1369 frames = 0;
1370 urb->number_of_packets = 0;
1371 spin_lock_irqsave(&subs->lock, flags);
976b6c06 1372 subs->frame_limit += ep->max_urb_frames;
edcd3633 1373 for (i = 0; i < ctx->packets; i++) {
245baf98
DM		 1374 if (ctx->packet_size[i])
1375 counts = ctx->packet_size[i];
1376 else
1377 counts = snd_usb_endpoint_next_packet_size(ep);
1378
edcd3633 1379 /* set up descriptor */
8a2a74d2
DM		 1380 urb->iso_frame_desc[i].offset = frames * ep->stride;
1381 urb->iso_frame_desc[i].length = counts * ep->stride;
edcd3633
DM		 1382 frames += counts;
1383 urb->number_of_packets++;
1384 subs->transfer_done += counts;
1385 if (subs->transfer_done >= runtime->period_size) {
1386 subs->transfer_done -= runtime->period_size;
976b6c06 1387 subs->frame_limit = 0;
edcd3633
DM		 1388 period_elapsed = 1;
1389 if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1390 if (subs->transfer_done > 0) {
1391 /* FIXME: fill-max mode is not
1392 * supported yet */
1393 frames -= subs->transfer_done;
1394 counts -= subs->transfer_done;
1395 urb->iso_frame_desc[i].length =
8a2a74d2 1396 counts * ep->stride;
edcd3633
DM		 1397 subs->transfer_done = 0;
1398 }
1399 i++;
1400 if (i < ctx->packets) {
1401 /* add a transfer delimiter */
1402 urb->iso_frame_desc[i].offset =
8a2a74d2 1403 frames * ep->stride;
edcd3633
DM		 1404 urb->iso_frame_desc[i].length = 0;
1405 urb->number_of_packets++;
1406 }
1407 break;
1408 }
1409 }
976b6c06
AS		 1410 /* finish at the period boundary or after enough frames */
1411 if ((period_elapsed ||
1412 subs->transfer_done >= subs->frame_limit) &&
1413 !snd_usb_endpoint_implicit_feedback_sink(ep))
edcd3633
DM		 1414 break;
1415 }
8a2a74d2 1416 bytes = frames * ep->stride;
d24f5061
DM		 1417
1418 if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE &&
1419 subs->cur_audiofmt->dsd_dop)) {
1420 fill_playback_urb_dsd_dop(subs, urb, bytes);
44dcbbb1
DM		 1421 } else if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U8 &&
1422 subs->cur_audiofmt->dsd_bitrev)) {
1423 /* bit-reverse the bytes */
1424 u8 *buf = urb->transfer_buffer;
1425 for (i = 0; i < bytes; i++) {
1426 int idx = (subs->hwptr_done + i)
1427 % (runtime->buffer_size * stride);
1428 buf[i] = bitrev8(runtime->dma_area[idx]);
1429 }
1430
1431 subs->hwptr_done += bytes;
edcd3633 1432 } else {
d24f5061
DM		 1433 /* usual PCM */
1434 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
1435 /* err, the transferred area goes over buffer boundary. */
1436 unsigned int bytes1 =
1437 runtime->buffer_size * stride - subs->hwptr_done;
1438 memcpy(urb->transfer_buffer,
1439 runtime->dma_area + subs->hwptr_done, bytes1);
1440 memcpy(urb->transfer_buffer + bytes1,
1441 runtime->dma_area, bytes - bytes1);
1442 } else {
1443 memcpy(urb->transfer_buffer,
1444 runtime->dma_area + subs->hwptr_done, bytes);
1445 }
1446
1447 subs->hwptr_done += bytes;
edcd3633 1448 }
d24f5061 1449
edcd3633
DM		 1450 if (subs->hwptr_done >= runtime->buffer_size * stride)
1451 subs->hwptr_done -= runtime->buffer_size * stride;
fbcfbf5f
DM		 1452
1453 /* update delay with exact number of samples queued */
1454 runtime->delay = subs->last_delay;
edcd3633 1455 runtime->delay += frames;
fbcfbf5f
DM		 1456 subs->last_delay = runtime->delay;
1457
1458 /* realign last_frame_number */
1459 subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1460 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1461
edcd3633
DM		 1462 spin_unlock_irqrestore(&subs->lock, flags);
1463 urb->transfer_buffer_length = bytes;
1464 if (period_elapsed)
1465 snd_pcm_period_elapsed(subs->pcm_substream);
1466}
1467
1468/*
1469 * process after playback data complete
1470 * - decrease the delay count again
1471 */
1472static void retire_playback_urb(struct snd_usb_substream *subs,
1473 struct urb *urb)
1474{
1475 unsigned long flags;
1476 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
8a2a74d2
DM		 1477 struct snd_usb_endpoint *ep = subs->data_endpoint;
1478 int processed = urb->transfer_buffer_length / ep->stride;
fbcfbf5f 1479 int est_delay;
edcd3633 1480
1213a205
TI		 1481 /* ignore the delay accounting when procssed=0 is given, i.e.
1482 * silent payloads are procssed before handling the actual data
1483 */
1484 if (!processed)
1485 return;
1486
edcd3633 1487 spin_lock_irqsave(&subs->lock, flags);
48779a0b
TI		 1488 if (!subs->last_delay)
1489 goto out; /* short path */
1490
fbcfbf5f
DM		 1491 est_delay = snd_usb_pcm_delay(subs, runtime->rate);
1492 /* update delay with exact number of samples played */
1493 if (processed > subs->last_delay)
1494 subs->last_delay = 0;
edcd3633 1495 else
fbcfbf5f
DM		 1496 subs->last_delay -= processed;
1497 runtime->delay = subs->last_delay;
1498
1499 /*
1500 * Report when delay estimate is off by more than 2ms.
1501 * The error should be lower than 2ms since the estimate relies
1502 * on two reads of a counter updated every ms.
1503 */
b7a77235
SE		 1504 if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
1505 dev_dbg_ratelimited(&subs->dev->dev,
0ba41d91 1506 "delay: estimated %d, actual %d\n",
fbcfbf5f
DM		 1507 est_delay, subs->last_delay);
1508
48779a0b
TI		 1509 if (!subs->running) {
1510 /* update last_frame_number for delay counting here since
1511 * prepare_playback_urb won't be called during pause
1512 */
1513 subs->last_frame_number =
1514 usb_get_current_frame_number(subs->dev) & 0xff;
1515 }
1516
1517 out:
edcd3633 1518 spin_unlock_irqrestore(&subs->lock, flags);
e5779998
DM		 1519}
1520
1521static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1522{
1523 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1524}
1525
1526static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1527{
1528 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1529}
1530
1531static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1532{
1533 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1534}
1535
1536static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1537{
1538 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1539}
1540
edcd3633
DM		 1541static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1542 int cmd)
1543{
1544 struct snd_usb_substream *subs = substream->runtime->private_data;
1545
1546 switch (cmd) {
1547 case SNDRV_PCM_TRIGGER_START:
1548 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1549 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
1550 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1551 subs->running = 1;
edcd3633
DM		 1552 return 0;
1553 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1554 stop_endpoints(subs, false);
97f8d3b6 1555 subs->running = 0;
edcd3633
DM		 1556 return 0;
1557 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1558 subs->data_endpoint->prepare_data_urb = NULL;
48779a0b
TI		 1559 /* keep retire_data_urb for delay calculation */
1560 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1561 subs->running = 0;
edcd3633
DM		 1562 return 0;
1563 }
1564
1565 return -EINVAL;
1566}
1567
afe25967
DM		 1568static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream,
1569 int cmd)
edcd3633
DM		 1570{
1571 int err;
1572 struct snd_usb_substream *subs = substream->runtime->private_data;
1573
1574 switch (cmd) {
1575 case SNDRV_PCM_TRIGGER_START:
a9bb3626 1576 err = start_endpoints(subs, false);
edcd3633
DM		 1577 if (err < 0)
1578 return err;
1579
1580 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1581 subs->running = 1;
edcd3633
DM		 1582 return 0;
1583 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1584 stop_endpoints(subs, false);
97f8d3b6 1585 subs->running = 0;
edcd3633
DM		 1586 return 0;
1587 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1588 subs->data_endpoint->retire_data_urb = NULL;
97f8d3b6 1589 subs->running = 0;
edcd3633
DM		 1590 return 0;
1591 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1592 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1593 subs->running = 1;
edcd3633
DM		 1594 return 0;
1595 }
1596
1597 return -EINVAL;
1598}
1599
e5779998
DM		 1600static struct snd_pcm_ops snd_usb_playback_ops = {
1601 .open = snd_usb_playback_open,
1602 .close = snd_usb_playback_close,
1603 .ioctl = snd_pcm_lib_ioctl,
1604 .hw_params = snd_usb_hw_params,
1605 .hw_free = snd_usb_hw_free,
1606 .prepare = snd_usb_pcm_prepare,
1607 .trigger = snd_usb_substream_playback_trigger,
1608 .pointer = snd_usb_pcm_pointer,
1609 .page = snd_pcm_lib_get_vmalloc_page,
1610 .mmap = snd_pcm_lib_mmap_vmalloc,
1611};
1612
1613static struct snd_pcm_ops snd_usb_capture_ops = {
1614 .open = snd_usb_capture_open,
1615 .close = snd_usb_capture_close,
1616 .ioctl = snd_pcm_lib_ioctl,
1617 .hw_params = snd_usb_hw_params,
1618 .hw_free = snd_usb_hw_free,
1619 .prepare = snd_usb_pcm_prepare,
1620 .trigger = snd_usb_substream_capture_trigger,
1621 .pointer = snd_usb_pcm_pointer,
1622 .page = snd_pcm_lib_get_vmalloc_page,
1623 .mmap = snd_pcm_lib_mmap_vmalloc,
1624};
1625
1626void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1627{
1628 snd_pcm_set_ops(pcm, stream,
1629 stream == SNDRV_PCM_STREAM_PLAYBACK ?
1630 &snd_usb_playback_ops : &snd_usb_capture_ops);
1631}
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