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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
[linux-block.git] / sound / usb / pcm.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
e5779998 2/*
e5779998
DM		 3 */
4
5#include <linux/init.h>
9966ddaf 6#include <linux/slab.h>
44dcbbb1 7#include <linux/bitrev.h>
edcd3633 8#include <linux/ratelimit.h>
e5779998
DM		 9#include <linux/usb.h>
10#include <linux/usb/audio.h>
7e847894 11#include <linux/usb/audio-v2.h>
e5779998
DM		 12
13#include <sound/core.h>
14#include <sound/pcm.h>
15#include <sound/pcm_params.h>
16
17#include "usbaudio.h"
18#include "card.h"
19#include "quirks.h"
20#include "debug.h"
c731bc96 21#include "endpoint.h"
e5779998
DM		 22#include "helper.h"
23#include "pcm.h"
79f920fb 24#include "clock.h"
88a8516a 25#include "power.h"
66354f18 26#include "media.h"
e5779998 27
edcd3633
DM		 28#define SUBSTREAM_FLAG_DATA_EP_STARTED 0
29#define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
30
294c4fb8
PLB		 31/* return the estimated delay based on USB frame counters */
32snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
33 unsigned int rate)
34{
35 int current_frame_number;
36 int frame_diff;
37 int est_delay;
38
48779a0b
TI		 39 if (!subs->last_delay)
40 return 0; /* short path */
41
294c4fb8
PLB		 42 current_frame_number = usb_get_current_frame_number(subs->dev);
43 /*
44 * HCD implementations use different widths, use lower 8 bits.
45 * The delay will be managed up to 256ms, which is more than
46 * enough
47 */
48 frame_diff = (current_frame_number - subs->last_frame_number) & 0xff;
49
50 /* Approximation based on number of samples per USB frame (ms),
51 some truncation for 44.1 but the estimate is good enough */
e4cc6153
PLB		 52 est_delay = frame_diff * rate / 1000;
53 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
54 est_delay = subs->last_delay - est_delay;
55 else
56 est_delay = subs->last_delay + est_delay;
57
294c4fb8
PLB		 58 if (est_delay < 0)
59 est_delay = 0;
60 return est_delay;
61}
62
e5779998
DM		 63/*
64 * return the current pcm pointer. just based on the hwptr_done value.
65 */
66static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
67{
e92be814 68 struct snd_usb_substream *subs = substream->runtime->private_data;
e5779998
DM		 69 unsigned int hwptr_done;
70
47ab1545 71 if (atomic_read(&subs->stream->chip->shutdown))
978520b7 72 return SNDRV_PCM_POS_XRUN;
e5779998
DM		 73 spin_lock(&subs->lock);
74 hwptr_done = subs->hwptr_done;
e4cc6153 75 substream->runtime->delay = snd_usb_pcm_delay(subs,
294c4fb8 76 substream->runtime->rate);
e5779998
DM		 77 spin_unlock(&subs->lock);
78 return hwptr_done / (substream->runtime->frame_bits >> 3);
79}
80
81/*
82 * find a matching audio format
83 */
61a70950 84static struct audioformat *find_format(struct snd_usb_substream *subs)
e5779998 85{
88766f04 86 struct audioformat *fp;
e5779998
DM		 87 struct audioformat *found = NULL;
88 int cur_attr = 0, attr;
89
88766f04 90 list_for_each_entry(fp, &subs->fmt_list, list) {
74c34ca1 91 if (!(fp->formats & pcm_format_to_bits(subs->pcm_format)))
015eb0b0 92 continue;
61a70950 93 if (fp->channels != subs->channels)
e5779998 94 continue;
61a70950
DR		 95 if (subs->cur_rate < fp->rate_min ||
96 subs->cur_rate > fp->rate_max)
e5779998
DM		 97 continue;
98 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
99 unsigned int i;
100 for (i = 0; i < fp->nr_rates; i++)
61a70950 101 if (fp->rate_table[i] == subs->cur_rate)
e5779998
DM		 102 break;
103 if (i >= fp->nr_rates)
104 continue;
105 }
106 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
107 if (! found) {
108 found = fp;
109 cur_attr = attr;
110 continue;
111 }
112 /* avoid async out and adaptive in if the other method
113 * supports the same format.
114 * this is a workaround for the case like
115 * M-audio audiophile USB.
116 */
117 if (attr != cur_attr) {
118 if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
119 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
120 (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
121 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
122 continue;
123 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
124 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
125 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
126 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
127 found = fp;
128 cur_attr = attr;
129 continue;
130 }
131 }
132 /* find the format with the largest max. packet size */
133 if (fp->maxpacksize > found->maxpacksize) {
134 found = fp;
135 cur_attr = attr;
136 }
137 }
138 return found;
139}
140
767d75ad
DM		 141static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
142 struct usb_host_interface *alts,
143 struct audioformat *fmt)
144{
145 struct usb_device *dev = chip->dev;
146 unsigned int ep;
147 unsigned char data[1];
148 int err;
149
447d6275
TI		 150 if (get_iface_desc(alts)->bNumEndpoints < 1)
151 return -EINVAL;
767d75ad
DM		 152 ep = get_endpoint(alts, 0)->bEndpointAddress;
153
767d75ad 154 data[0] = 1;
f25ecf8f
TI		 155 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
156 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
157 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
158 data, sizeof(data));
159 if (err < 0) {
0ba41d91
TI		 160 usb_audio_err(chip, "%d:%d: cannot set enable PITCH\n",
161 iface, ep);
767d75ad
DM		 162 return err;
163 }
164
165 return 0;
166}
e5779998 167
92c25611
DM		 168static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
169 struct usb_host_interface *alts,
170 struct audioformat *fmt)
171{
172 struct usb_device *dev = chip->dev;
173 unsigned char data[1];
92c25611
DM		 174 int err;
175
92c25611 176 data[0] = 1;
f25ecf8f
TI		 177 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
178 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
179 UAC2_EP_CS_PITCH << 8, 0,
180 data, sizeof(data));
181 if (err < 0) {
0ba41d91
TI		 182 usb_audio_err(chip, "%d:%d: cannot set enable PITCH (v2)\n",
183 iface, fmt->altsetting);
92c25611
DM		 184 return err;
185 }
186
187 return 0;
188}
189
e5779998 190/*
92c25611 191 * initialize the pitch control and sample rate
e5779998 192 */
767d75ad 193int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
e5779998
DM		 194 struct usb_host_interface *alts,
195 struct audioformat *fmt)
196{
92c25611
DM		 197 /* if endpoint doesn't have pitch control, bail out */
198 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
199 return 0;
200
8f898e92 201 switch (fmt->protocol) {
767d75ad 202 case UAC_VERSION_1:
a2acad82 203 default:
767d75ad
DM		 204 return init_pitch_v1(chip, iface, alts, fmt);
205
206 case UAC_VERSION_2:
92c25611 207 return init_pitch_v2(chip, iface, alts, fmt);
767d75ad 208 }
767d75ad
DM		 209}
210
1d0f9530 211static int start_endpoints(struct snd_usb_substream *subs)
edcd3633
DM		 212{
213 int err;
214
215 if (!subs->data_endpoint)
216 return -EINVAL;
217
218 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
219 struct snd_usb_endpoint *ep = subs->data_endpoint;
220
0ba41d91 221 dev_dbg(&subs->dev->dev, "Starting data EP @%p\n", ep);
edcd3633
DM		 222
223 ep->data_subs = subs;
1d0f9530 224 err = snd_usb_endpoint_start(ep);
edcd3633
DM		 225 if (err < 0) {
226 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
227 return err;
228 }
229 }
230
231 if (subs->sync_endpoint &&
232 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
233 struct snd_usb_endpoint *ep = subs->sync_endpoint;
234
2e4a263c 235 if (subs->data_endpoint->iface != subs->sync_endpoint->iface ||
df23a246 236 subs->data_endpoint->altsetting != subs->sync_endpoint->altsetting) {
2e4a263c
DM		 237 err = usb_set_interface(subs->dev,
238 subs->sync_endpoint->iface,
df23a246 239 subs->sync_endpoint->altsetting);
2e4a263c 240 if (err < 0) {
06613f54 241 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
0ba41d91
TI		 242 dev_err(&subs->dev->dev,
243 "%d:%d: cannot set interface (%d)\n",
2e4a263c 244 subs->sync_endpoint->iface,
df23a246 245 subs->sync_endpoint->altsetting, err);
2e4a263c
DM		 246 return -EIO;
247 }
248 }
249
0ba41d91 250 dev_dbg(&subs->dev->dev, "Starting sync EP @%p\n", ep);
edcd3633
DM		 251
252 ep->sync_slave = subs->data_endpoint;
1d0f9530 253 err = snd_usb_endpoint_start(ep);
edcd3633
DM		 254 if (err < 0) {
255 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
256 return err;
257 }
258 }
259
260 return 0;
261}
262
a9bb3626 263static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
edcd3633
DM		 264{
265 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
b2eb950d 266 snd_usb_endpoint_stop(subs->sync_endpoint);
edcd3633
DM		 267
268 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
b2eb950d
TI		 269 snd_usb_endpoint_stop(subs->data_endpoint);
270
271 if (wait) {
272 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
273 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
274 }
edcd3633
DM		 275}
276
ba7c2be1
CL		 277static int search_roland_implicit_fb(struct usb_device *dev, int ifnum,
278 unsigned int altsetting,
279 struct usb_host_interface **alts,
280 unsigned int *ep)
281{
282 struct usb_interface *iface;
283 struct usb_interface_descriptor *altsd;
284 struct usb_endpoint_descriptor *epd;
285
286 iface = usb_ifnum_to_if(dev, ifnum);
287 if (!iface || iface->num_altsetting < altsetting + 1)
288 return -ENOENT;
289 *alts = &iface->altsetting[altsetting];
290 altsd = get_iface_desc(*alts);
291 if (altsd->bAlternateSetting != altsetting ||
292 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC ||
293 (altsd->bInterfaceSubClass != 2 &&
294 altsd->bInterfaceProtocol != 2 ) ||
295 altsd->bNumEndpoints < 1)
296 return -ENOENT;
297 epd = get_endpoint(*alts, 0);
298 if (!usb_endpoint_is_isoc_in(epd) ||
299 (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
300 USB_ENDPOINT_USAGE_IMPLICIT_FB)
301 return -ENOENT;
302 *ep = epd->bEndpointAddress;
303 return 0;
304}
305
2bc16b9f
MR		 306/* Setup an implicit feedback endpoint from a quirk. Returns 0 if no quirk
307 * applies. Returns 1 if a quirk was found.
308 */
a60945fd
EZ		 309static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
310 struct usb_device *dev,
311 struct usb_interface_descriptor *altsd,
312 unsigned int attr)
e5779998 313{
a60945fd 314 struct usb_host_interface *alts;
e5779998 315 struct usb_interface *iface;
a60945fd 316 unsigned int ep;
103e9625 317 unsigned int ifnum;
c75a8a7a 318
914273c7
EZ		 319 /* Implicit feedback sync EPs consumers are always playback EPs */
320 if (subs->direction != SNDRV_PCM_STREAM_PLAYBACK)
321 return 0;
322
c75a8a7a 323 switch (subs->stream->chip->usb_id) {
ca10a7eb 324 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
e9a25e04 325 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
914273c7 326 ep = 0x81;
103e9625
AA		 327 ifnum = 3;
328 goto add_sync_ep_from_ifnum;
c75a8a7a
DM		 329 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
330 case USB_ID(0x0763, 0x2081):
914273c7 331 ep = 0x81;
103e9625
AA		 332 ifnum = 2;
333 goto add_sync_ep_from_ifnum;
334 case USB_ID(0x2466, 0x8003): /* Fractal Audio Axe-Fx II */
17f08b0d 335 ep = 0x86;
103e9625
AA		 336 ifnum = 2;
337 goto add_sync_ep_from_ifnum;
91a8561d
AA		 338 case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx III */
339 ep = 0x81;
340 ifnum = 2;
341 goto add_sync_ep_from_ifnum;
103e9625 342 case USB_ID(0x1397, 0x0002): /* Behringer UFX1204 */
5e35dc03 343 ep = 0x81;
103e9625
AA		 344 ifnum = 1;
345 goto add_sync_ep_from_ifnum;
a634090a
MR		 346 case USB_ID(0x07fd, 0x0004): /* MOTU MicroBook II */
347 ep = 0x84;
348 ifnum = 0;
349 goto add_sync_ep_from_ifnum;
c75a8a7a 350 }
103e9625 351
914273c7 352 if (attr == USB_ENDPOINT_SYNC_ASYNC &&
ba7c2be1
CL		 353 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
354 altsd->bInterfaceProtocol == 2 &&
355 altsd->bNumEndpoints == 1 &&
356 USB_ID_VENDOR(subs->stream->chip->usb_id) == 0x0582 /* Roland */ &&
357 search_roland_implicit_fb(dev, altsd->bInterfaceNumber + 1,
358 altsd->bAlternateSetting,
359 &alts, &ep) >= 0) {
ba7c2be1
CL		 360 goto add_sync_ep;
361 }
edcd3633 362
a60945fd
EZ		 363 /* No quirk */
364 return 0;
365
103e9625
AA		 366add_sync_ep_from_ifnum:
367 iface = usb_ifnum_to_if(dev, ifnum);
368
369 if (!iface || iface->num_altsetting == 0)
370 return -EINVAL;
371
372 alts = &iface->altsetting[1];
373
a60945fd
EZ		 374add_sync_ep:
375 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
376 alts, ep, !subs->direction,
88abb8ef 377 SND_USB_ENDPOINT_TYPE_DATA);
a60945fd
EZ		 378 if (!subs->sync_endpoint)
379 return -EINVAL;
380
381 subs->data_endpoint->sync_master = subs->sync_endpoint;
382
2bc16b9f 383 return 1;
a60945fd
EZ		 384}
385
386static int set_sync_endpoint(struct snd_usb_substream *subs,
387 struct audioformat *fmt,
388 struct usb_device *dev,
389 struct usb_host_interface *alts,
390 struct usb_interface_descriptor *altsd)
391{
392 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
393 unsigned int ep, attr;
95fec883 394 bool implicit_fb;
a60945fd
EZ		 395 int err;
396
397 /* we need a sync pipe in async OUT or adaptive IN mode */
398 /* check the number of EP, since some devices have broken
399 * descriptors which fool us. if it has only one EP,
400 * assume it as adaptive-out or sync-in.
401 */
402 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
403
63018447
PLB		 404 if ((is_playback && (attr != USB_ENDPOINT_SYNC_ASYNC)) ||
405 (!is_playback && (attr != USB_ENDPOINT_SYNC_ADAPTIVE))) {
406
407 /*
408 * In these modes the notion of sync_endpoint is irrelevant.
409 * Reset pointers to avoid using stale data from previously
410 * used settings, e.g. when configuration and endpoints were
411 * changed
412 */
413
414 subs->sync_endpoint = NULL;
415 subs->data_endpoint->sync_master = NULL;
416 }
417
a60945fd
EZ		 418 err = set_sync_ep_implicit_fb_quirk(subs, dev, altsd, attr);
419 if (err < 0)
420 return err;
421
2bc16b9f
MR		 422 /* endpoint set by quirk */
423 if (err > 0)
424 return 0;
425
f34d0650
EZ		 426 if (altsd->bNumEndpoints < 2)
427 return 0;
c75a8a7a 428
395ae54b
PLB		 429 if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC ||
430 attr == USB_ENDPOINT_SYNC_ADAPTIVE)) ||
f34d0650
EZ		 431 (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE))
432 return 0;
edcd3633 433
395ae54b
PLB		 434 /*
435 * In case of illegal SYNC_NONE for OUT endpoint, we keep going to see
436 * if we don't find a sync endpoint, as on M-Audio Transit. In case of
437 * error fall back to SYNC mode and don't create sync endpoint
438 */
439
f34d0650
EZ		 440 /* check sync-pipe endpoint */
441 /* ... and check descriptor size before accessing bSynchAddress
442 because there is a version of the SB Audigy 2 NX firmware lacking
443 the audio fields in the endpoint descriptors */
444 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
445 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
95fec883 446 get_endpoint(alts, 1)->bSynchAddress != 0)) {
0ba41d91
TI		 447 dev_err(&dev->dev,
448 "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
449 fmt->iface, fmt->altsetting,
f34d0650
EZ		 450 get_endpoint(alts, 1)->bmAttributes,
451 get_endpoint(alts, 1)->bLength,
452 get_endpoint(alts, 1)->bSynchAddress);
395ae54b
PLB		 453 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
454 return 0;
f34d0650
EZ		 455 return -EINVAL;
456 }
457 ep = get_endpoint(alts, 1)->bEndpointAddress;
95fec883 458 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
f34d0650
EZ		 459 ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
460 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
0ba41d91
TI		 461 dev_err(&dev->dev,
462 "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
463 fmt->iface, fmt->altsetting,
f34d0650 464 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
395ae54b
PLB		 465 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
466 return 0;
f34d0650 467 return -EINVAL;
edcd3633 468 }
e5779998 469
f34d0650
EZ		 470 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
471 == USB_ENDPOINT_USAGE_IMPLICIT_FB;
472
473 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
474 alts, ep, !subs->direction,
475 implicit_fb ?
476 SND_USB_ENDPOINT_TYPE_DATA :
477 SND_USB_ENDPOINT_TYPE_SYNC);
395ae54b
PLB		 478 if (!subs->sync_endpoint) {
479 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
480 return 0;
f34d0650 481 return -EINVAL;
395ae54b 482 }
f34d0650
EZ		 483
484 subs->data_endpoint->sync_master = subs->sync_endpoint;
485
71bb64c5
EZ		 486 return 0;
487}
488
489/*
490 * find a matching format and set up the interface
491 */
492static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
493{
494 struct usb_device *dev = subs->dev;
495 struct usb_host_interface *alts;
496 struct usb_interface_descriptor *altsd;
497 struct usb_interface *iface;
498 int err;
499
500 iface = usb_ifnum_to_if(dev, fmt->iface);
501 if (WARN_ON(!iface))
502 return -EINVAL;
b099b969 503 alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
71bb64c5
EZ		 504 altsd = get_iface_desc(alts);
505 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
506 return -EINVAL;
507
508 if (fmt == subs->cur_audiofmt)
509 return 0;
510
511 /* close the old interface */
512 if (subs->interface >= 0 && subs->interface != fmt->iface) {
8a463225
TI		 513 if (!subs->stream->chip->keep_iface) {
514 err = usb_set_interface(subs->dev, subs->interface, 0);
515 if (err < 0) {
516 dev_err(&dev->dev,
517 "%d:%d: return to setting 0 failed (%d)\n",
518 fmt->iface, fmt->altsetting, err);
519 return -EIO;
520 }
71bb64c5
EZ		 521 }
522 subs->interface = -1;
523 subs->altset_idx = 0;
524 }
525
526 /* set interface */
b099b969 527 if (iface->cur_altsetting != alts) {
6874daad
JK		 528 err = snd_usb_select_mode_quirk(subs, fmt);
529 if (err < 0)
530 return -EIO;
531
71bb64c5
EZ		 532 err = usb_set_interface(dev, fmt->iface, fmt->altsetting);
533 if (err < 0) {
0ba41d91
TI		 534 dev_err(&dev->dev,
535 "%d:%d: usb_set_interface failed (%d)\n",
536 fmt->iface, fmt->altsetting, err);
71bb64c5
EZ		 537 return -EIO;
538 }
0ba41d91
TI		 539 dev_dbg(&dev->dev, "setting usb interface %d:%d\n",
540 fmt->iface, fmt->altsetting);
71bb64c5
EZ		 541 snd_usb_set_interface_quirk(dev);
542 }
543
b099b969
TI		 544 subs->interface = fmt->iface;
545 subs->altset_idx = fmt->altset_idx;
71bb64c5
EZ		 546 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
547 alts, fmt->endpoint, subs->direction,
548 SND_USB_ENDPOINT_TYPE_DATA);
549
550 if (!subs->data_endpoint)
551 return -EINVAL;
552
553 err = set_sync_endpoint(subs, fmt, dev, alts, altsd);
554 if (err < 0)
555 return err;
556
d133f2c2
EZ		 557 err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt);
558 if (err < 0)
e5779998
DM		 559 return err;
560
561 subs->cur_audiofmt = fmt;
562
563 snd_usb_set_format_quirk(subs, fmt);
564
e5779998
DM		 565 return 0;
566}
567
0d9741c0
EZ		 568/*
569 * Return the score of matching two audioformats.
570 * Veto the audioformat if:
571 * - It has no channels for some reason.
572 * - Requested PCM format is not supported.
573 * - Requested sample rate is not supported.
574 */
0ba41d91
TI		 575static int match_endpoint_audioformats(struct snd_usb_substream *subs,
576 struct audioformat *fp,
577 struct audioformat *match, int rate,
578 snd_pcm_format_t pcm_format)
0d9741c0
EZ		 579{
580 int i;
581 int score = 0;
582
583 if (fp->channels < 1) {
0ba41d91
TI		 584 dev_dbg(&subs->dev->dev,
585 "%s: (fmt @%p) no channels\n", __func__, fp);
0d9741c0
EZ		 586 return 0;
587 }
588
74c34ca1 589 if (!(fp->formats & pcm_format_to_bits(pcm_format))) {
0ba41d91
TI		 590 dev_dbg(&subs->dev->dev,
591 "%s: (fmt @%p) no match for format %d\n", __func__,
0d9741c0
EZ		 592 fp, pcm_format);
593 return 0;
594 }
595
596 for (i = 0; i < fp->nr_rates; i++) {
597 if (fp->rate_table[i] == rate) {
598 score++;
599 break;
600 }
601 }
602 if (!score) {
0ba41d91
TI		 603 dev_dbg(&subs->dev->dev,
604 "%s: (fmt @%p) no match for rate %d\n", __func__,
0d9741c0
EZ		 605 fp, rate);
606 return 0;
607 }
608
609 if (fp->channels == match->channels)
610 score++;
611
0ba41d91
TI		 612 dev_dbg(&subs->dev->dev,
613 "%s: (fmt @%p) score %d\n", __func__, fp, score);
0d9741c0
EZ		 614
615 return score;
616}
617
618/*
619 * Configure the sync ep using the rate and pcm format of the data ep.
620 */
621static int configure_sync_endpoint(struct snd_usb_substream *subs)
622{
623 int ret;
624 struct audioformat *fp;
625 struct audioformat *sync_fp = NULL;
626 int cur_score = 0;
627 int sync_period_bytes = subs->period_bytes;
628 struct snd_usb_substream *sync_subs =
629 &subs->stream->substream[subs->direction ^ 1];
630
31be5425
TI		 631 if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA ||
632 !subs->stream)
633 return snd_usb_endpoint_set_params(subs->sync_endpoint,
634 subs->pcm_format,
635 subs->channels,
636 subs->period_bytes,
976b6c06 637 0, 0,
31be5425
TI		 638 subs->cur_rate,
639 subs->cur_audiofmt,
640 NULL);
641
0d9741c0
EZ		 642 /* Try to find the best matching audioformat. */
643 list_for_each_entry(fp, &sync_subs->fmt_list, list) {
0ba41d91
TI		 644 int score = match_endpoint_audioformats(subs,
645 fp, subs->cur_audiofmt,
0d9741c0
EZ		 646 subs->cur_rate, subs->pcm_format);
647
648 if (score > cur_score) {
649 sync_fp = fp;
650 cur_score = score;
651 }
652 }
653
654 if (unlikely(sync_fp == NULL)) {
0ba41d91
TI		 655 dev_err(&subs->dev->dev,
656 "%s: no valid audioformat for sync ep %x found\n",
0d9741c0
EZ		 657 __func__, sync_subs->ep_num);
658 return -EINVAL;
659 }
660
661 /*
662 * Recalculate the period bytes if channel number differ between
663 * data and sync ep audioformat.
664 */
665 if (sync_fp->channels != subs->channels) {
666 sync_period_bytes = (subs->period_bytes / subs->channels) *
667 sync_fp->channels;
0ba41d91
TI		 668 dev_dbg(&subs->dev->dev,
669 "%s: adjusted sync ep period bytes (%d -> %d)\n",
0d9741c0
EZ		 670 __func__, subs->period_bytes, sync_period_bytes);
671 }
672
673 ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
674 subs->pcm_format,
675 sync_fp->channels,
676 sync_period_bytes,
976b6c06 677 0, 0,
0d9741c0
EZ		 678 subs->cur_rate,
679 sync_fp,
680 NULL);
681
682 return ret;
683}
684
61a70950
DR		 685/*
686 * configure endpoint params
687 *
688 * called during initial setup and upon resume
689 */
690static int configure_endpoint(struct snd_usb_substream *subs)
691{
692 int ret;
693
61a70950 694 /* format changed */
b0db6063 695 stop_endpoints(subs, true);
61a70950
DR		 696 ret = snd_usb_endpoint_set_params(subs->data_endpoint,
697 subs->pcm_format,
698 subs->channels,
699 subs->period_bytes,
976b6c06
AS		 700 subs->period_frames,
701 subs->buffer_periods,
61a70950
DR		 702 subs->cur_rate,
703 subs->cur_audiofmt,
704 subs->sync_endpoint);
705 if (ret < 0)
978520b7 706 return ret;
61a70950
DR		 707
708 if (subs->sync_endpoint)
0d9741c0
EZ		 709 ret = configure_sync_endpoint(subs);
710
61a70950
DR		 711 return ret;
712}
713
3f59aa11
JS		 714static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state)
715{
716 int ret;
717
718 if (!subs->str_pd)
719 return 0;
720
721 ret = snd_usb_power_domain_set(subs->stream->chip, subs->str_pd, state);
722 if (ret < 0) {
723 dev_err(&subs->dev->dev,
724 "Cannot change Power Domain ID: %d to state: %d. Err: %d\n",
725 subs->str_pd->pd_id, state, ret);
726 return ret;
727 }
728
729 return 0;
730}
731
732int snd_usb_pcm_suspend(struct snd_usb_stream *as)
733{
734 int ret;
735
736 ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D2);
737 if (ret < 0)
738 return ret;
739
740 ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D2);
741 if (ret < 0)
742 return ret;
743
744 return 0;
745}
746
747int snd_usb_pcm_resume(struct snd_usb_stream *as)
748{
749 int ret;
750
a0a4959e 751 ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D1);
3f59aa11
JS		 752 if (ret < 0)
753 return ret;
754
a0a4959e 755 ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D1);
3f59aa11
JS		 756 if (ret < 0)
757 return ret;
758
759 return 0;
760}
761
e5779998
DM		 762/*
763 * hw_params callback
764 *
765 * allocate a buffer and set the given audio format.
766 *
767 * so far we use a physically linear buffer although packetize transfer
768 * doesn't need a continuous area.
769 * if sg buffer is supported on the later version of alsa, we'll follow
770 * that.
771 */
772static int snd_usb_hw_params(struct snd_pcm_substream *substream,
773 struct snd_pcm_hw_params *hw_params)
774{
775 struct snd_usb_substream *subs = substream->runtime->private_data;
776 struct audioformat *fmt;
61a70950 777 int ret;
e5779998 778
66354f18
SK		 779 ret = snd_media_start_pipeline(subs);
780 if (ret)
781 return ret;
782
f274baa4
TI		 783 if (snd_usb_use_vmalloc)
784 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
785 params_buffer_bytes(hw_params));
786 else
787 ret = snd_pcm_lib_malloc_pages(substream,
e5779998
DM		 788 params_buffer_bytes(hw_params));
789 if (ret < 0)
66354f18 790 goto stop_pipeline;
e5779998 791
61a70950
DR		 792 subs->pcm_format = params_format(hw_params);
793 subs->period_bytes = params_period_bytes(hw_params);
976b6c06
AS		 794 subs->period_frames = params_period_size(hw_params);
795 subs->buffer_periods = params_periods(hw_params);
61a70950
DR		 796 subs->channels = params_channels(hw_params);
797 subs->cur_rate = params_rate(hw_params);
798
799 fmt = find_format(subs);
e5779998 800 if (!fmt) {
0ba41d91
TI		 801 dev_dbg(&subs->dev->dev,
802 "cannot set format: format = %#x, rate = %d, channels = %d\n",
61a70950 803 subs->pcm_format, subs->cur_rate, subs->channels);
66354f18
SK		 804 ret = -EINVAL;
805 goto stop_pipeline;
e5779998
DM		 806 }
807
47ab1545
TI		 808 ret = snd_usb_lock_shutdown(subs->stream->chip);
809 if (ret < 0)
66354f18 810 goto stop_pipeline;
a0a4959e
JS		 811
812 ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0);
813 if (ret < 0)
814 goto unlock;
815
47ab1545 816 ret = set_format(subs, fmt);
978520b7 817 if (ret < 0)
a0a4959e 818 goto unlock;
e5779998 819
61a70950
DR		 820 subs->interface = fmt->iface;
821 subs->altset_idx = fmt->altset_idx;
384dc085 822 subs->need_setup_ep = true;
715a1705 823
a0a4959e
JS		 824 unlock:
825 snd_usb_unlock_shutdown(subs->stream->chip);
66354f18
SK		 826 if (ret < 0)
827 goto stop_pipeline;
828 return ret;
829
830 stop_pipeline:
831 snd_media_stop_pipeline(subs);
a0a4959e 832 return ret;
e5779998
DM		 833}
834
835/*
836 * hw_free callback
837 *
838 * reset the audio format and release the buffer
839 */
840static int snd_usb_hw_free(struct snd_pcm_substream *substream)
841{
842 struct snd_usb_substream *subs = substream->runtime->private_data;
843
66354f18 844 snd_media_stop_pipeline(subs);
e5779998
DM		 845 subs->cur_audiofmt = NULL;
846 subs->cur_rate = 0;
847 subs->period_bytes = 0;
47ab1545 848 if (!snd_usb_lock_shutdown(subs->stream->chip)) {
a9bb3626 849 stop_endpoints(subs, true);
26de5d0a
EZ		 850 snd_usb_endpoint_deactivate(subs->sync_endpoint);
851 snd_usb_endpoint_deactivate(subs->data_endpoint);
47ab1545 852 snd_usb_unlock_shutdown(subs->stream->chip);
978520b7 853 }
f274baa4
TI		 854
855 if (snd_usb_use_vmalloc)
856 return snd_pcm_lib_free_vmalloc_buffer(substream);
857 else
858 return snd_pcm_lib_free_pages(substream);
e5779998
DM		 859}
860
861/*
862 * prepare callback
863 *
864 * only a few subtle things...
865 */
866static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
867{
868 struct snd_pcm_runtime *runtime = substream->runtime;
869 struct snd_usb_substream *subs = runtime->private_data;
61a70950
DR		 870 struct usb_host_interface *alts;
871 struct usb_interface *iface;
872 int ret;
e5779998
DM		 873
874 if (! subs->cur_audiofmt) {
0ba41d91 875 dev_err(&subs->dev->dev, "no format is specified!\n");
e5779998
DM		 876 return -ENXIO;
877 }
878
47ab1545
TI		 879 ret = snd_usb_lock_shutdown(subs->stream->chip);
880 if (ret < 0)
881 return ret;
978520b7
TI		 882 if (snd_BUG_ON(!subs->data_endpoint)) {
883 ret = -EIO;
884 goto unlock;
885 }
edcd3633 886
f58161ba
TI		 887 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
888 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
889
a0a4959e
JS		 890 ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0);
891 if (ret < 0)
892 goto unlock;
893
61a70950
DR		 894 ret = set_format(subs, subs->cur_audiofmt);
895 if (ret < 0)
978520b7 896 goto unlock;
61a70950 897
384dc085 898 if (subs->need_setup_ep) {
1e2e3fe4
DG		 899
900 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface);
901 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx];
902 ret = snd_usb_init_sample_rate(subs->stream->chip,
903 subs->cur_audiofmt->iface,
904 alts,
905 subs->cur_audiofmt,
906 subs->cur_rate);
907 if (ret < 0)
908 goto unlock;
909
384dc085
TI		 910 ret = configure_endpoint(subs);
911 if (ret < 0)
978520b7 912 goto unlock;
384dc085
TI		 913 subs->need_setup_ep = false;
914 }
61a70950 915
e5779998 916 /* some unit conversions in runtime */
edcd3633
DM		 917 subs->data_endpoint->maxframesize =
918 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
919 subs->data_endpoint->curframesize =
920 bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
e5779998
DM		 921
922 /* reset the pointer */
923 subs->hwptr_done = 0;
924 subs->transfer_done = 0;
294c4fb8
PLB		 925 subs->last_delay = 0;
926 subs->last_frame_number = 0;
e5779998
DM		 927 runtime->delay = 0;
928
edcd3633
DM		 929 /* for playback, submit the URBs now; otherwise, the first hwptr_done
930 * updates for all URBs would happen at the same time when starting */
931 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
1d0f9530 932 ret = start_endpoints(subs);
edcd3633 933
978520b7 934 unlock:
47ab1545 935 snd_usb_unlock_shutdown(subs->stream->chip);
978520b7 936 return ret;
e5779998
DM		 937}
938
aaffbf78 939static const struct snd_pcm_hardware snd_usb_hardware =
e5779998
DM		 940{
941 .info = SNDRV_PCM_INFO_MMAP |
942 SNDRV_PCM_INFO_MMAP_VALID |
943 SNDRV_PCM_INFO_BATCH |
944 SNDRV_PCM_INFO_INTERLEAVED |
945 SNDRV_PCM_INFO_BLOCK_TRANSFER |
946 SNDRV_PCM_INFO_PAUSE,
947 .buffer_bytes_max = 1024 * 1024,
948 .period_bytes_min = 64,
949 .period_bytes_max = 512 * 1024,
950 .periods_min = 2,
951 .periods_max = 1024,
952};
953
954static int hw_check_valid_format(struct snd_usb_substream *subs,
955 struct snd_pcm_hw_params *params,
956 struct audioformat *fp)
957{
958 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
959 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
960 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
961 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
015eb0b0 962 struct snd_mask check_fmts;
e5779998
DM		 963 unsigned int ptime;
964
965 /* check the format */
015eb0b0
CL		 966 snd_mask_none(&check_fmts);
967 check_fmts.bits[0] = (u32)fp->formats;
968 check_fmts.bits[1] = (u32)(fp->formats >> 32);
969 snd_mask_intersect(&check_fmts, fmts);
970 if (snd_mask_empty(&check_fmts)) {
e5779998
DM		 971 hwc_debug(" > check: no supported format %d\n", fp->format);
972 return 0;
973 }
974 /* check the channels */
975 if (fp->channels < ct->min || fp->channels > ct->max) {
976 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
977 return 0;
978 }
979 /* check the rate is within the range */
980 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
981 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
982 return 0;
983 }
984 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
985 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
986 return 0;
987 }
988 /* check whether the period time is >= the data packet interval */
978520b7 989 if (subs->speed != USB_SPEED_FULL) {
e5779998
DM		 990 ptime = 125 * (1 << fp->datainterval);
991 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
992 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
993 return 0;
994 }
995 }
996 return 1;
997}
998
999static int hw_rule_rate(struct snd_pcm_hw_params *params,
1000 struct snd_pcm_hw_rule *rule)
1001{
1002 struct snd_usb_substream *subs = rule->private;
88766f04 1003 struct audioformat *fp;
e5779998
DM		 1004 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1005 unsigned int rmin, rmax;
1006 int changed;
1007
1008 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1009 changed = 0;
1010 rmin = rmax = 0;
88766f04 1011 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 1012 if (!hw_check_valid_format(subs, params, fp))
1013 continue;
1014 if (changed++) {
1015 if (rmin > fp->rate_min)
1016 rmin = fp->rate_min;
1017 if (rmax < fp->rate_max)
1018 rmax = fp->rate_max;
1019 } else {
1020 rmin = fp->rate_min;
1021 rmax = fp->rate_max;
1022 }
1023 }
1024
1025 if (!changed) {
1026 hwc_debug(" --> get empty\n");
1027 it->empty = 1;
1028 return -EINVAL;
1029 }
1030
1031 changed = 0;
1032 if (it->min < rmin) {
1033 it->min = rmin;
1034 it->openmin = 0;
1035 changed = 1;
1036 }
1037 if (it->max > rmax) {
1038 it->max = rmax;
1039 it->openmax = 0;
1040 changed = 1;
1041 }
1042 if (snd_interval_checkempty(it)) {
1043 it->empty = 1;
1044 return -EINVAL;
1045 }
1046 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1047 return changed;
1048}
1049
1050
1051static int hw_rule_channels(struct snd_pcm_hw_params *params,
1052 struct snd_pcm_hw_rule *rule)
1053{
1054 struct snd_usb_substream *subs = rule->private;
88766f04 1055 struct audioformat *fp;
e5779998
DM		 1056 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1057 unsigned int rmin, rmax;
1058 int changed;
1059
1060 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1061 changed = 0;
1062 rmin = rmax = 0;
88766f04 1063 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 1064 if (!hw_check_valid_format(subs, params, fp))
1065 continue;
1066 if (changed++) {
1067 if (rmin > fp->channels)
1068 rmin = fp->channels;
1069 if (rmax < fp->channels)
1070 rmax = fp->channels;
1071 } else {
1072 rmin = fp->channels;
1073 rmax = fp->channels;
1074 }
1075 }
1076
1077 if (!changed) {
1078 hwc_debug(" --> get empty\n");
1079 it->empty = 1;
1080 return -EINVAL;
1081 }
1082
1083 changed = 0;
1084 if (it->min < rmin) {
1085 it->min = rmin;
1086 it->openmin = 0;
1087 changed = 1;
1088 }
1089 if (it->max > rmax) {
1090 it->max = rmax;
1091 it->openmax = 0;
1092 changed = 1;
1093 }
1094 if (snd_interval_checkempty(it)) {
1095 it->empty = 1;
1096 return -EINVAL;
1097 }
1098 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1099 return changed;
1100}
1101
1102static int hw_rule_format(struct snd_pcm_hw_params *params,
1103 struct snd_pcm_hw_rule *rule)
1104{
1105 struct snd_usb_substream *subs = rule->private;
88766f04 1106 struct audioformat *fp;
e5779998
DM		 1107 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1108 u64 fbits;
1109 u32 oldbits[2];
1110 int changed;
1111
1112 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1113 fbits = 0;
88766f04 1114 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 1115 if (!hw_check_valid_format(subs, params, fp))
1116 continue;
015eb0b0 1117 fbits |= fp->formats;
e5779998
DM		 1118 }
1119
1120 oldbits[0] = fmt->bits[0];
1121 oldbits[1] = fmt->bits[1];
1122 fmt->bits[0] &= (u32)fbits;
1123 fmt->bits[1] &= (u32)(fbits >> 32);
1124 if (!fmt->bits[0] && !fmt->bits[1]) {
1125 hwc_debug(" --> get empty\n");
1126 return -EINVAL;
1127 }
1128 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1129 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1130 return changed;
1131}
1132
1133static int hw_rule_period_time(struct snd_pcm_hw_params *params,
1134 struct snd_pcm_hw_rule *rule)
1135{
1136 struct snd_usb_substream *subs = rule->private;
1137 struct audioformat *fp;
1138 struct snd_interval *it;
1139 unsigned char min_datainterval;
1140 unsigned int pmin;
1141 int changed;
1142
1143 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
1144 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
1145 min_datainterval = 0xff;
1146 list_for_each_entry(fp, &subs->fmt_list, list) {
1147 if (!hw_check_valid_format(subs, params, fp))
1148 continue;
1149 min_datainterval = min(min_datainterval, fp->datainterval);
1150 }
1151 if (min_datainterval == 0xff) {
a7ce2e0d 1152 hwc_debug(" --> get empty\n");
e5779998
DM		 1153 it->empty = 1;
1154 return -EINVAL;
1155 }
1156 pmin = 125 * (1 << min_datainterval);
1157 changed = 0;
1158 if (it->min < pmin) {
1159 it->min = pmin;
1160 it->openmin = 0;
1161 changed = 1;
1162 }
1163 if (snd_interval_checkempty(it)) {
1164 it->empty = 1;
1165 return -EINVAL;
1166 }
1167 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
1168 return changed;
1169}
1170
1171/*
1172 * If the device supports unusual bit rates, does the request meet these?
1173 */
1174static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1175 struct snd_usb_substream *subs)
1176{
1177 struct audioformat *fp;
0717d0f5 1178 int *rate_list;
e5779998
DM		 1179 int count = 0, needs_knot = 0;
1180 int err;
1181
5cd5d7c4
CL		 1182 kfree(subs->rate_list.list);
1183 subs->rate_list.list = NULL;
1184
e5779998
DM		 1185 list_for_each_entry(fp, &subs->fmt_list, list) {
1186 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1187 return 0;
1188 count += fp->nr_rates;
1189 if (fp->rates & SNDRV_PCM_RATE_KNOT)
1190 needs_knot = 1;
1191 }
1192 if (!needs_knot)
1193 return 0;
1194
0717d0f5 1195 subs->rate_list.list = rate_list =
6da2ec56 1196 kmalloc_array(count, sizeof(int), GFP_KERNEL);
8a8d56b2
JJ		 1197 if (!subs->rate_list.list)
1198 return -ENOMEM;
1199 subs->rate_list.count = count;
e5779998
DM		 1200 subs->rate_list.mask = 0;
1201 count = 0;
1202 list_for_each_entry(fp, &subs->fmt_list, list) {
1203 int i;
1204 for (i = 0; i < fp->nr_rates; i++)
0717d0f5 1205 rate_list[count++] = fp->rate_table[i];
e5779998
DM		 1206 }
1207 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1208 &subs->rate_list);
1209 if (err < 0)
1210 return err;
1211
1212 return 0;
1213}
1214
1215
1216/*
1217 * set up the runtime hardware information.
1218 */
1219
1220static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1221{
88766f04 1222 struct audioformat *fp;
e5779998
DM		 1223 unsigned int pt, ptmin;
1224 int param_period_time_if_needed;
1225 int err;
1226
1227 runtime->hw.formats = subs->formats;
1228
1229 runtime->hw.rate_min = 0x7fffffff;
1230 runtime->hw.rate_max = 0;
1231 runtime->hw.channels_min = 256;
1232 runtime->hw.channels_max = 0;
1233 runtime->hw.rates = 0;
1234 ptmin = UINT_MAX;
1235 /* check min/max rates and channels */
88766f04 1236 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 1237 runtime->hw.rates |= fp->rates;
1238 if (runtime->hw.rate_min > fp->rate_min)
1239 runtime->hw.rate_min = fp->rate_min;
1240 if (runtime->hw.rate_max < fp->rate_max)
1241 runtime->hw.rate_max = fp->rate_max;
1242 if (runtime->hw.channels_min > fp->channels)
1243 runtime->hw.channels_min = fp->channels;
1244 if (runtime->hw.channels_max < fp->channels)
1245 runtime->hw.channels_max = fp->channels;
1246 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
1247 /* FIXME: there might be more than one audio formats... */
1248 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1249 fp->frame_size;
1250 }
1251 pt = 125 * (1 << fp->datainterval);
1252 ptmin = min(ptmin, pt);
1253 }
1254
1255 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
978520b7 1256 if (subs->speed == USB_SPEED_FULL)
e5779998
DM		 1257 /* full speed devices have fixed data packet interval */
1258 ptmin = 1000;
1259 if (ptmin == 1000)
1260 /* if period time doesn't go below 1 ms, no rules needed */
1261 param_period_time_if_needed = -1;
e92be814
TI		 1262
1263 err = snd_pcm_hw_constraint_minmax(runtime,
1264 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1265 ptmin, UINT_MAX);
1266 if (err < 0)
1267 return err;
1268
1269 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1270 hw_rule_rate, subs,
1271 SNDRV_PCM_HW_PARAM_FORMAT,
1272 SNDRV_PCM_HW_PARAM_CHANNELS,
1273 param_period_time_if_needed,
1274 -1);
1275 if (err < 0)
1276 return err;
1277 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1278 hw_rule_channels, subs,
1279 SNDRV_PCM_HW_PARAM_FORMAT,
1280 SNDRV_PCM_HW_PARAM_RATE,
1281 param_period_time_if_needed,
1282 -1);
1283 if (err < 0)
1284 return err;
1285 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1286 hw_rule_format, subs,
1287 SNDRV_PCM_HW_PARAM_RATE,
1288 SNDRV_PCM_HW_PARAM_CHANNELS,
1289 param_period_time_if_needed,
1290 -1);
1291 if (err < 0)
1292 return err;
e5779998
DM		 1293 if (param_period_time_if_needed >= 0) {
1294 err = snd_pcm_hw_rule_add(runtime, 0,
1295 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1296 hw_rule_period_time, subs,
1297 SNDRV_PCM_HW_PARAM_FORMAT,
1298 SNDRV_PCM_HW_PARAM_CHANNELS,
1299 SNDRV_PCM_HW_PARAM_RATE,
1300 -1);
1301 if (err < 0)
e92be814 1302 return err;
e5779998 1303 }
e92be814
TI		 1304 err = snd_usb_pcm_check_knot(runtime, subs);
1305 if (err < 0)
1306 return err;
88a8516a 1307
e92be814 1308 return snd_usb_autoresume(subs->stream->chip);
e5779998
DM		 1309}
1310
6fddc797 1311static int snd_usb_pcm_open(struct snd_pcm_substream *substream)
e5779998 1312{
6fddc797 1313 int direction = substream->stream;
e5779998
DM		 1314 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1315 struct snd_pcm_runtime *runtime = substream->runtime;
1316 struct snd_usb_substream *subs = &as->substream[direction];
66354f18 1317 int ret;
e5779998
DM		 1318
1319 subs->interface = -1;
e11b4e0e 1320 subs->altset_idx = 0;
e5779998
DM		 1321 runtime->hw = snd_usb_hardware;
1322 runtime->private_data = subs;
1323 subs->pcm_substream = substream;
88a8516a 1324 /* runtime PM is also done there */
d24f5061
DM		 1325
1326 /* initialize DSD/DOP context */
1327 subs->dsd_dop.byte_idx = 0;
1328 subs->dsd_dop.channel = 0;
1329 subs->dsd_dop.marker = 1;
1330
66354f18
SK		 1331 ret = setup_hw_info(runtime, subs);
1332 if (ret == 0) {
1333 ret = snd_media_stream_init(subs, as->pcm, direction);
1334 if (ret)
1335 snd_usb_autosuspend(subs->stream->chip);
1336 }
1337 return ret;
e5779998
DM		 1338}
1339
6fddc797 1340static int snd_usb_pcm_close(struct snd_pcm_substream *substream)
e5779998 1341{
6fddc797 1342 int direction = substream->stream;
e5779998
DM		 1343 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1344 struct snd_usb_substream *subs = &as->substream[direction];
a0a4959e 1345 int ret;
e5779998 1346
b0db6063 1347 stop_endpoints(subs, true);
66354f18 1348 snd_media_stop_pipeline(subs);
68e67f40 1349
8a463225
TI		 1350 if (!as->chip->keep_iface &&
1351 subs->interface >= 0 &&
47ab1545 1352 !snd_usb_lock_shutdown(subs->stream->chip)) {
68e67f40
DM		 1353 usb_set_interface(subs->dev, subs->interface, 0);
1354 subs->interface = -1;
a0a4959e 1355 ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D1);
47ab1545 1356 snd_usb_unlock_shutdown(subs->stream->chip);
a0a4959e
JS		 1357 if (ret < 0)
1358 return ret;
68e67f40
DM		 1359 }
1360
e5779998 1361 subs->pcm_substream = NULL;
88a8516a 1362 snd_usb_autosuspend(subs->stream->chip);
edcd3633 1363
68e67f40 1364 return 0;
edcd3633
DM		 1365}
1366
1367/* Since a URB can handle only a single linear buffer, we must use double
1368 * buffering when the data to be transferred overflows the buffer boundary.
1369 * To avoid inconsistencies when updating hwptr_done, we use double buffering
1370 * for all URBs.
1371 */
1372static void retire_capture_urb(struct snd_usb_substream *subs,
1373 struct urb *urb)
1374{
1375 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1376 unsigned int stride, frames, bytes, oldptr;
1377 int i, period_elapsed = 0;
1378 unsigned long flags;
1379 unsigned char *cp;
e4cc6153
PLB		 1380 int current_frame_number;
1381
1382 /* read frame number here, update pointer in critical section */
1383 current_frame_number = usb_get_current_frame_number(subs->dev);
edcd3633
DM		 1384
1385 stride = runtime->frame_bits >> 3;
1386
1387 for (i = 0; i < urb->number_of_packets; i++) {
1539d4f8 1388 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj;
edcd3633 1389 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
0ba41d91
TI		 1390 dev_dbg(&subs->dev->dev, "frame %d active: %d\n",
1391 i, urb->iso_frame_desc[i].status);
edcd3633
DM		 1392 // continue;
1393 }
1394 bytes = urb->iso_frame_desc[i].actual_length;
1395 frames = bytes / stride;
1396 if (!subs->txfr_quirk)
1397 bytes = frames * stride;
1398 if (bytes % (runtime->sample_bits >> 3) != 0) {
edcd3633 1399 int oldbytes = bytes;
edcd3633 1400 bytes = frames * stride;
377a879d 1401 dev_warn_ratelimited(&subs->dev->dev,
0ba41d91 1402 "Corrected urb data len. %d->%d\n",
edcd3633
DM		 1403 oldbytes, bytes);
1404 }
1405 /* update the current pointer */
1406 spin_lock_irqsave(&subs->lock, flags);
1407 oldptr = subs->hwptr_done;
1408 subs->hwptr_done += bytes;
1409 if (subs->hwptr_done >= runtime->buffer_size * stride)
1410 subs->hwptr_done -= runtime->buffer_size * stride;
1411 frames = (bytes + (oldptr % stride)) / stride;
1412 subs->transfer_done += frames;
1413 if (subs->transfer_done >= runtime->period_size) {
1414 subs->transfer_done -= runtime->period_size;
1415 period_elapsed = 1;
1416 }
e4cc6153
PLB		 1417 /* capture delay is by construction limited to one URB,
1418 * reset delays here
1419 */
1420 runtime->delay = subs->last_delay = 0;
1421
1422 /* realign last_frame_number */
1423 subs->last_frame_number = current_frame_number;
1424 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1425
edcd3633
DM		 1426 spin_unlock_irqrestore(&subs->lock, flags);
1427 /* copy a data chunk */
1428 if (oldptr + bytes > runtime->buffer_size * stride) {
1429 unsigned int bytes1 =
1430 runtime->buffer_size * stride - oldptr;
1431 memcpy(runtime->dma_area + oldptr, cp, bytes1);
1432 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1433 } else {
1434 memcpy(runtime->dma_area + oldptr, cp, bytes);
1435 }
1436 }
1437
1438 if (period_elapsed)
1439 snd_pcm_period_elapsed(subs->pcm_substream);
1440}
1441
d24f5061
DM		 1442static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs,
1443 struct urb *urb, unsigned int bytes)
1444{
1445 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1446 unsigned int stride = runtime->frame_bits >> 3;
1447 unsigned int dst_idx = 0;
1448 unsigned int src_idx = subs->hwptr_done;
1449 unsigned int wrap = runtime->buffer_size * stride;
1450 u8 *dst = urb->transfer_buffer;
1451 u8 *src = runtime->dma_area;
1452 u8 marker[] = { 0x05, 0xfa };
1453
1454 /*
1455 * The DSP DOP format defines a way to transport DSD samples over
1456 * normal PCM data endpoints. It requires stuffing of marker bytes
1457 * (0x05 and 0xfa, alternating per sample frame), and then expects
1458 * 2 additional bytes of actual payload. The whole frame is stored
1459 * LSB.
1460 *
1461 * Hence, for a stereo transport, the buffer layout looks like this,
1462 * where L refers to left channel samples and R to right.
1463 *
1464 * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa
1465 * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa
1466 * .....
1467 *
1468 */
1469
1470 while (bytes--) {
1471 if (++subs->dsd_dop.byte_idx == 3) {
1472 /* frame boundary? */
1473 dst[dst_idx++] = marker[subs->dsd_dop.marker];
1474 src_idx += 2;
1475 subs->dsd_dop.byte_idx = 0;
1476
1477 if (++subs->dsd_dop.channel % runtime->channels == 0) {
1478 /* alternate the marker */
1479 subs->dsd_dop.marker++;
1480 subs->dsd_dop.marker %= ARRAY_SIZE(marker);
1481 subs->dsd_dop.channel = 0;
1482 }
1483 } else {
1484 /* stuff the DSD payload */
1485 int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap;
44dcbbb1
DM		 1486
1487 if (subs->cur_audiofmt->dsd_bitrev)
1488 dst[dst_idx++] = bitrev8(src[idx]);
1489 else
1490 dst[dst_idx++] = src[idx];
1491
d24f5061
DM		 1492 subs->hwptr_done++;
1493 }
1494 }
4c4e4391
RW		 1495 if (subs->hwptr_done >= runtime->buffer_size * stride)
1496 subs->hwptr_done -= runtime->buffer_size * stride;
d24f5061
DM		 1497}
1498
b97a9369
RW		 1499static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb,
1500 int offset, int stride, unsigned int bytes)
07a40c2f
RW		 1501{
1502 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1503
1504 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
1505 /* err, the transferred area goes over buffer boundary. */
1506 unsigned int bytes1 =
1507 runtime->buffer_size * stride - subs->hwptr_done;
b97a9369 1508 memcpy(urb->transfer_buffer + offset,
07a40c2f 1509 runtime->dma_area + subs->hwptr_done, bytes1);
b97a9369 1510 memcpy(urb->transfer_buffer + offset + bytes1,
07a40c2f
RW		 1511 runtime->dma_area, bytes - bytes1);
1512 } else {
b97a9369 1513 memcpy(urb->transfer_buffer + offset,
07a40c2f
RW		 1514 runtime->dma_area + subs->hwptr_done, bytes);
1515 }
1516 subs->hwptr_done += bytes;
4c4e4391
RW		 1517 if (subs->hwptr_done >= runtime->buffer_size * stride)
1518 subs->hwptr_done -= runtime->buffer_size * stride;
07a40c2f
RW		 1519}
1520
e0570446
RW		 1521static unsigned int copy_to_urb_quirk(struct snd_usb_substream *subs,
1522 struct urb *urb, int stride,
1523 unsigned int bytes)
1524{
1525 __le32 packet_length;
1526 int i;
1527
1528 /* Put __le32 length descriptor at start of each packet. */
1529 for (i = 0; i < urb->number_of_packets; i++) {
1530 unsigned int length = urb->iso_frame_desc[i].length;
1531 unsigned int offset = urb->iso_frame_desc[i].offset;
1532
1533 packet_length = cpu_to_le32(length);
1534 offset += i * sizeof(packet_length);
1535 urb->iso_frame_desc[i].offset = offset;
1536 urb->iso_frame_desc[i].length += sizeof(packet_length);
1537 memcpy(urb->transfer_buffer + offset,
1538 &packet_length, sizeof(packet_length));
1539 copy_to_urb(subs, urb, offset + sizeof(packet_length),
1540 stride, length);
1541 }
1542 /* Adjust transfer size accordingly. */
1543 bytes += urb->number_of_packets * sizeof(packet_length);
1544 return bytes;
1545}
1546
edcd3633
DM		 1547static void prepare_playback_urb(struct snd_usb_substream *subs,
1548 struct urb *urb)
1549{
1550 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
245baf98 1551 struct snd_usb_endpoint *ep = subs->data_endpoint;
edcd3633
DM		 1552 struct snd_urb_ctx *ctx = urb->context;
1553 unsigned int counts, frames, bytes;
1554 int i, stride, period_elapsed = 0;
1555 unsigned long flags;
1556
1557 stride = runtime->frame_bits >> 3;
1558
1559 frames = 0;
1560 urb->number_of_packets = 0;
1561 spin_lock_irqsave(&subs->lock, flags);
976b6c06 1562 subs->frame_limit += ep->max_urb_frames;
edcd3633 1563 for (i = 0; i < ctx->packets; i++) {
245baf98
DM		 1564 if (ctx->packet_size[i])
1565 counts = ctx->packet_size[i];
1566 else
1567 counts = snd_usb_endpoint_next_packet_size(ep);
1568
edcd3633 1569 /* set up descriptor */
8a2a74d2
DM		 1570 urb->iso_frame_desc[i].offset = frames * ep->stride;
1571 urb->iso_frame_desc[i].length = counts * ep->stride;
edcd3633
DM		 1572 frames += counts;
1573 urb->number_of_packets++;
1574 subs->transfer_done += counts;
1575 if (subs->transfer_done >= runtime->period_size) {
1576 subs->transfer_done -= runtime->period_size;
976b6c06 1577 subs->frame_limit = 0;
edcd3633
DM		 1578 period_elapsed = 1;
1579 if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1580 if (subs->transfer_done > 0) {
1581 /* FIXME: fill-max mode is not
1582 * supported yet */
1583 frames -= subs->transfer_done;
1584 counts -= subs->transfer_done;
1585 urb->iso_frame_desc[i].length =
8a2a74d2 1586 counts * ep->stride;
edcd3633
DM		 1587 subs->transfer_done = 0;
1588 }
1589 i++;
1590 if (i < ctx->packets) {
1591 /* add a transfer delimiter */
1592 urb->iso_frame_desc[i].offset =
8a2a74d2 1593 frames * ep->stride;
edcd3633
DM		 1594 urb->iso_frame_desc[i].length = 0;
1595 urb->number_of_packets++;
1596 }
1597 break;
1598 }
1599 }
976b6c06
AS		 1600 /* finish at the period boundary or after enough frames */
1601 if ((period_elapsed ||
1602 subs->transfer_done >= subs->frame_limit) &&
1603 !snd_usb_endpoint_implicit_feedback_sink(ep))
edcd3633
DM		 1604 break;
1605 }
8a2a74d2 1606 bytes = frames * ep->stride;
d24f5061
DM		 1607
1608 if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE &&
1609 subs->cur_audiofmt->dsd_dop)) {
1610 fill_playback_urb_dsd_dop(subs, urb, bytes);
44dcbbb1
DM		 1611 } else if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U8 &&
1612 subs->cur_audiofmt->dsd_bitrev)) {
1613 /* bit-reverse the bytes */
1614 u8 *buf = urb->transfer_buffer;
1615 for (i = 0; i < bytes; i++) {
1616 int idx = (subs->hwptr_done + i)
1617 % (runtime->buffer_size * stride);
1618 buf[i] = bitrev8(runtime->dma_area[idx]);
1619 }
1620
1621 subs->hwptr_done += bytes;
4c4e4391
RW		 1622 if (subs->hwptr_done >= runtime->buffer_size * stride)
1623 subs->hwptr_done -= runtime->buffer_size * stride;
edcd3633 1624 } else {
d24f5061 1625 /* usual PCM */
e0570446
RW		 1626 if (!subs->tx_length_quirk)
1627 copy_to_urb(subs, urb, 0, stride, bytes);
1628 else
1629 bytes = copy_to_urb_quirk(subs, urb, stride, bytes);
1630 /* bytes is now amount of outgoing data */
edcd3633 1631 }
d24f5061 1632
fbcfbf5f
DM		 1633 /* update delay with exact number of samples queued */
1634 runtime->delay = subs->last_delay;
edcd3633 1635 runtime->delay += frames;
fbcfbf5f
DM		 1636 subs->last_delay = runtime->delay;
1637
1638 /* realign last_frame_number */
1639 subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1640 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1641
ea33d359
PLB		 1642 if (subs->trigger_tstamp_pending_update) {
1643 /* this is the first actual URB submitted,
1644 * update trigger timestamp to reflect actual start time
1645 */
1646 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1647 subs->trigger_tstamp_pending_update = false;
1648 }
1649
edcd3633
DM		 1650 spin_unlock_irqrestore(&subs->lock, flags);
1651 urb->transfer_buffer_length = bytes;
1652 if (period_elapsed)
1653 snd_pcm_period_elapsed(subs->pcm_substream);
1654}
1655
1656/*
1657 * process after playback data complete
1658 * - decrease the delay count again
1659 */
1660static void retire_playback_urb(struct snd_usb_substream *subs,
1661 struct urb *urb)
1662{
1663 unsigned long flags;
1664 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
8a2a74d2
DM		 1665 struct snd_usb_endpoint *ep = subs->data_endpoint;
1666 int processed = urb->transfer_buffer_length / ep->stride;
fbcfbf5f 1667 int est_delay;
edcd3633 1668
1213a205
TI		 1669 /* ignore the delay accounting when procssed=0 is given, i.e.
1670 * silent payloads are procssed before handling the actual data
1671 */
1672 if (!processed)
1673 return;
1674
edcd3633 1675 spin_lock_irqsave(&subs->lock, flags);
48779a0b
TI		 1676 if (!subs->last_delay)
1677 goto out; /* short path */
1678
fbcfbf5f
DM		 1679 est_delay = snd_usb_pcm_delay(subs, runtime->rate);
1680 /* update delay with exact number of samples played */
1681 if (processed > subs->last_delay)
1682 subs->last_delay = 0;
edcd3633 1683 else
fbcfbf5f
DM		 1684 subs->last_delay -= processed;
1685 runtime->delay = subs->last_delay;
1686
1687 /*
1688 * Report when delay estimate is off by more than 2ms.
1689 * The error should be lower than 2ms since the estimate relies
1690 * on two reads of a counter updated every ms.
1691 */
b7a77235
SE		 1692 if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
1693 dev_dbg_ratelimited(&subs->dev->dev,
0ba41d91 1694 "delay: estimated %d, actual %d\n",
fbcfbf5f
DM		 1695 est_delay, subs->last_delay);
1696
48779a0b
TI		 1697 if (!subs->running) {
1698 /* update last_frame_number for delay counting here since
1699 * prepare_playback_urb won't be called during pause
1700 */
1701 subs->last_frame_number =
1702 usb_get_current_frame_number(subs->dev) & 0xff;
1703 }
1704
1705 out:
edcd3633 1706 spin_unlock_irqrestore(&subs->lock, flags);
e5779998
DM		 1707}
1708
edcd3633
DM		 1709static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1710 int cmd)
1711{
1712 struct snd_usb_substream *subs = substream->runtime->private_data;
1713
1714 switch (cmd) {
1715 case SNDRV_PCM_TRIGGER_START:
ea33d359 1716 subs->trigger_tstamp_pending_update = true;
d5e77fca 1717 /* fall through */
edcd3633
DM		 1718 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1719 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
1720 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1721 subs->running = 1;
edcd3633
DM		 1722 return 0;
1723 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1724 stop_endpoints(subs, false);
97f8d3b6 1725 subs->running = 0;
edcd3633
DM		 1726 return 0;
1727 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1728 subs->data_endpoint->prepare_data_urb = NULL;
48779a0b
TI		 1729 /* keep retire_data_urb for delay calculation */
1730 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1731 subs->running = 0;
edcd3633
DM		 1732 return 0;
1733 }
1734
1735 return -EINVAL;
1736}
1737
afe25967
DM		 1738static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream,
1739 int cmd)
edcd3633
DM		 1740{
1741 int err;
1742 struct snd_usb_substream *subs = substream->runtime->private_data;
1743
1744 switch (cmd) {
1745 case SNDRV_PCM_TRIGGER_START:
1d0f9530 1746 err = start_endpoints(subs);
edcd3633
DM		 1747 if (err < 0)
1748 return err;
1749
1750 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1751 subs->running = 1;
edcd3633
DM		 1752 return 0;
1753 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1754 stop_endpoints(subs, false);
97f8d3b6 1755 subs->running = 0;
edcd3633
DM		 1756 return 0;
1757 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1758 subs->data_endpoint->retire_data_urb = NULL;
97f8d3b6 1759 subs->running = 0;
edcd3633
DM		 1760 return 0;
1761 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1762 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1763 subs->running = 1;
edcd3633
DM		 1764 return 0;
1765 }
1766
1767 return -EINVAL;
1768}
1769
31cb1fb4 1770static const struct snd_pcm_ops snd_usb_playback_ops = {
6fddc797
TI		 1771 .open = snd_usb_pcm_open,
1772 .close = snd_usb_pcm_close,
e5779998
DM		 1773 .ioctl = snd_pcm_lib_ioctl,
1774 .hw_params = snd_usb_hw_params,
1775 .hw_free = snd_usb_hw_free,
1776 .prepare = snd_usb_pcm_prepare,
1777 .trigger = snd_usb_substream_playback_trigger,
1778 .pointer = snd_usb_pcm_pointer,
1779 .page = snd_pcm_lib_get_vmalloc_page,
e5779998
DM		 1780};
1781
31cb1fb4 1782static const struct snd_pcm_ops snd_usb_capture_ops = {
6fddc797
TI		 1783 .open = snd_usb_pcm_open,
1784 .close = snd_usb_pcm_close,
e5779998
DM		 1785 .ioctl = snd_pcm_lib_ioctl,
1786 .hw_params = snd_usb_hw_params,
1787 .hw_free = snd_usb_hw_free,
1788 .prepare = snd_usb_pcm_prepare,
1789 .trigger = snd_usb_substream_capture_trigger,
1790 .pointer = snd_usb_pcm_pointer,
1791 .page = snd_pcm_lib_get_vmalloc_page,
e5779998
DM		 1792};
1793
f274baa4
TI		 1794static const struct snd_pcm_ops snd_usb_playback_dev_ops = {
1795 .open = snd_usb_pcm_open,
1796 .close = snd_usb_pcm_close,
1797 .ioctl = snd_pcm_lib_ioctl,
1798 .hw_params = snd_usb_hw_params,
1799 .hw_free = snd_usb_hw_free,
1800 .prepare = snd_usb_pcm_prepare,
1801 .trigger = snd_usb_substream_playback_trigger,
1802 .pointer = snd_usb_pcm_pointer,
1803 .page = snd_pcm_sgbuf_ops_page,
1804};
1805
1806static const struct snd_pcm_ops snd_usb_capture_dev_ops = {
1807 .open = snd_usb_pcm_open,
1808 .close = snd_usb_pcm_close,
1809 .ioctl = snd_pcm_lib_ioctl,
1810 .hw_params = snd_usb_hw_params,
1811 .hw_free = snd_usb_hw_free,
1812 .prepare = snd_usb_pcm_prepare,
1813 .trigger = snd_usb_substream_capture_trigger,
1814 .pointer = snd_usb_pcm_pointer,
1815 .page = snd_pcm_sgbuf_ops_page,
1816};
1817
e5779998
DM		 1818void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1819{
f274baa4
TI		 1820 const struct snd_pcm_ops *ops;
1821
1822 if (snd_usb_use_vmalloc)
1823 ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
1824 &snd_usb_playback_ops : &snd_usb_capture_ops;
1825 else
1826 ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
1827 &snd_usb_playback_dev_ops : &snd_usb_capture_dev_ops;
1828 snd_pcm_set_ops(pcm, stream, ops);
1829}
1830
1831void snd_usb_preallocate_buffer(struct snd_usb_substream *subs)
1832{
1833 struct snd_pcm *pcm = subs->stream->pcm;
1834 struct snd_pcm_substream *s = pcm->streams[subs->direction].substream;
1835 struct device *dev = subs->dev->bus->controller;
1836
1837 if (!snd_usb_use_vmalloc)
1838 snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_DEV_SG,
1839 dev, 64*1024, 512*1024);
e5779998 1840}
Linux 6.x block layer and io_uring tree(s)