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ALSA: hda/ca0132: constify parameter table for effects
[linux-2.6-block.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;
47ab1545 83 if (atomic_read(&subs->stream->chip->shutdown))
978520b7 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
447d6275
TI		 162 if (get_iface_desc(alts)->bNumEndpoints < 1)
163 return -EINVAL;
767d75ad
DM		 164 ep = get_endpoint(alts, 0)->bEndpointAddress;
165
767d75ad
DM		 166 data[0] = 1;
167 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
168 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
169 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
17d900c4 170 data, sizeof(data))) < 0) {
0ba41d91
TI		 171 usb_audio_err(chip, "%d:%d: cannot set enable PITCH\n",
172 iface, ep);
767d75ad
DM		 173 return err;
174 }
175
176 return 0;
177}
e5779998 178
92c25611
DM		 179static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
180 struct usb_host_interface *alts,
181 struct audioformat *fmt)
182{
183 struct usb_device *dev = chip->dev;
184 unsigned char data[1];
92c25611
DM		 185 int err;
186
92c25611
DM		 187 data[0] = 1;
188 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
189 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
190 UAC2_EP_CS_PITCH << 8, 0,
17d900c4 191 data, sizeof(data))) < 0) {
0ba41d91
TI		 192 usb_audio_err(chip, "%d:%d: cannot set enable PITCH (v2)\n",
193 iface, fmt->altsetting);
92c25611
DM		 194 return err;
195 }
196
197 return 0;
198}
199
e5779998 200/*
92c25611 201 * initialize the pitch control and sample rate
e5779998 202 */
767d75ad 203int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
e5779998
DM		 204 struct usb_host_interface *alts,
205 struct audioformat *fmt)
206{
92c25611
DM		 207 /* if endpoint doesn't have pitch control, bail out */
208 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
209 return 0;
210
8f898e92 211 switch (fmt->protocol) {
767d75ad 212 case UAC_VERSION_1:
a2acad82 213 default:
767d75ad
DM		 214 return init_pitch_v1(chip, iface, alts, fmt);
215
216 case UAC_VERSION_2:
92c25611 217 return init_pitch_v2(chip, iface, alts, fmt);
767d75ad 218 }
767d75ad
DM		 219}
220
1d0f9530 221static int start_endpoints(struct snd_usb_substream *subs)
edcd3633
DM		 222{
223 int err;
224
225 if (!subs->data_endpoint)
226 return -EINVAL;
227
228 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
229 struct snd_usb_endpoint *ep = subs->data_endpoint;
230
0ba41d91 231 dev_dbg(&subs->dev->dev, "Starting data EP @%p\n", ep);
edcd3633
DM		 232
233 ep->data_subs = subs;
1d0f9530 234 err = snd_usb_endpoint_start(ep);
edcd3633
DM		 235 if (err < 0) {
236 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
237 return err;
238 }
239 }
240
241 if (subs->sync_endpoint &&
242 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
243 struct snd_usb_endpoint *ep = subs->sync_endpoint;
244
2e4a263c 245 if (subs->data_endpoint->iface != subs->sync_endpoint->iface ||
df23a246 246 subs->data_endpoint->altsetting != subs->sync_endpoint->altsetting) {
2e4a263c
DM		 247 err = usb_set_interface(subs->dev,
248 subs->sync_endpoint->iface,
df23a246 249 subs->sync_endpoint->altsetting);
2e4a263c 250 if (err < 0) {
06613f54 251 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
0ba41d91
TI		 252 dev_err(&subs->dev->dev,
253 "%d:%d: cannot set interface (%d)\n",
2e4a263c 254 subs->sync_endpoint->iface,
df23a246 255 subs->sync_endpoint->altsetting, err);
2e4a263c
DM		 256 return -EIO;
257 }
258 }
259
0ba41d91 260 dev_dbg(&subs->dev->dev, "Starting sync EP @%p\n", ep);
edcd3633
DM		 261
262 ep->sync_slave = subs->data_endpoint;
1d0f9530 263 err = snd_usb_endpoint_start(ep);
edcd3633
DM		 264 if (err < 0) {
265 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
266 return err;
267 }
268 }
269
270 return 0;
271}
272
a9bb3626 273static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
edcd3633
DM		 274{
275 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
b2eb950d 276 snd_usb_endpoint_stop(subs->sync_endpoint);
edcd3633
DM		 277
278 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
b2eb950d
TI		 279 snd_usb_endpoint_stop(subs->data_endpoint);
280
281 if (wait) {
282 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
283 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
284 }
edcd3633
DM		 285}
286
ba7c2be1
CL		 287static int search_roland_implicit_fb(struct usb_device *dev, int ifnum,
288 unsigned int altsetting,
289 struct usb_host_interface **alts,
290 unsigned int *ep)
291{
292 struct usb_interface *iface;
293 struct usb_interface_descriptor *altsd;
294 struct usb_endpoint_descriptor *epd;
295
296 iface = usb_ifnum_to_if(dev, ifnum);
297 if (!iface || iface->num_altsetting < altsetting + 1)
298 return -ENOENT;
299 *alts = &iface->altsetting[altsetting];
300 altsd = get_iface_desc(*alts);
301 if (altsd->bAlternateSetting != altsetting ||
302 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC ||
303 (altsd->bInterfaceSubClass != 2 &&
304 altsd->bInterfaceProtocol != 2 ) ||
305 altsd->bNumEndpoints < 1)
306 return -ENOENT;
307 epd = get_endpoint(*alts, 0);
308 if (!usb_endpoint_is_isoc_in(epd) ||
309 (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
310 USB_ENDPOINT_USAGE_IMPLICIT_FB)
311 return -ENOENT;
312 *ep = epd->bEndpointAddress;
313 return 0;
314}
315
a60945fd
EZ		 316static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
317 struct usb_device *dev,
318 struct usb_interface_descriptor *altsd,
319 unsigned int attr)
e5779998 320{
a60945fd 321 struct usb_host_interface *alts;
e5779998 322 struct usb_interface *iface;
a60945fd 323 unsigned int ep;
103e9625 324 unsigned int ifnum;
c75a8a7a 325
914273c7
EZ		 326 /* Implicit feedback sync EPs consumers are always playback EPs */
327 if (subs->direction != SNDRV_PCM_STREAM_PLAYBACK)
328 return 0;
329
c75a8a7a 330 switch (subs->stream->chip->usb_id) {
ca10a7eb 331 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
e9a25e04 332 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
914273c7 333 ep = 0x81;
103e9625
AA		 334 ifnum = 3;
335 goto add_sync_ep_from_ifnum;
c75a8a7a
DM		 336 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
337 case USB_ID(0x0763, 0x2081):
914273c7 338 ep = 0x81;
103e9625
AA		 339 ifnum = 2;
340 goto add_sync_ep_from_ifnum;
341 case USB_ID(0x2466, 0x8003): /* Fractal Audio Axe-Fx II */
17f08b0d 342 ep = 0x86;
103e9625
AA		 343 ifnum = 2;
344 goto add_sync_ep_from_ifnum;
91a8561d
AA		 345 case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx III */
346 ep = 0x81;
347 ifnum = 2;
348 goto add_sync_ep_from_ifnum;
103e9625 349 case USB_ID(0x1397, 0x0002): /* Behringer UFX1204 */
5e35dc03 350 ep = 0x81;
103e9625
AA		 351 ifnum = 1;
352 goto add_sync_ep_from_ifnum;
c75a8a7a 353 }
103e9625 354
914273c7 355 if (attr == USB_ENDPOINT_SYNC_ASYNC &&
ba7c2be1
CL		 356 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
357 altsd->bInterfaceProtocol == 2 &&
358 altsd->bNumEndpoints == 1 &&
359 USB_ID_VENDOR(subs->stream->chip->usb_id) == 0x0582 /* Roland */ &&
360 search_roland_implicit_fb(dev, altsd->bInterfaceNumber + 1,
361 altsd->bAlternateSetting,
362 &alts, &ep) >= 0) {
ba7c2be1
CL		 363 goto add_sync_ep;
364 }
edcd3633 365
a60945fd
EZ		 366 /* No quirk */
367 return 0;
368
103e9625
AA		 369add_sync_ep_from_ifnum:
370 iface = usb_ifnum_to_if(dev, ifnum);
371
372 if (!iface || iface->num_altsetting == 0)
373 return -EINVAL;
374
375 alts = &iface->altsetting[1];
376
a60945fd
EZ		 377add_sync_ep:
378 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
379 alts, ep, !subs->direction,
88abb8ef 380 SND_USB_ENDPOINT_TYPE_DATA);
a60945fd
EZ		 381 if (!subs->sync_endpoint)
382 return -EINVAL;
383
384 subs->data_endpoint->sync_master = subs->sync_endpoint;
385
386 return 0;
387}
388
389static int set_sync_endpoint(struct snd_usb_substream *subs,
390 struct audioformat *fmt,
391 struct usb_device *dev,
392 struct usb_host_interface *alts,
393 struct usb_interface_descriptor *altsd)
394{
395 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
396 unsigned int ep, attr;
95fec883 397 bool implicit_fb;
a60945fd
EZ		 398 int err;
399
400 /* we need a sync pipe in async OUT or adaptive IN mode */
401 /* check the number of EP, since some devices have broken
402 * descriptors which fool us. if it has only one EP,
403 * assume it as adaptive-out or sync-in.
404 */
405 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
406
63018447
PLB		 407 if ((is_playback && (attr != USB_ENDPOINT_SYNC_ASYNC)) ||
408 (!is_playback && (attr != USB_ENDPOINT_SYNC_ADAPTIVE))) {
409
410 /*
411 * In these modes the notion of sync_endpoint is irrelevant.
412 * Reset pointers to avoid using stale data from previously
413 * used settings, e.g. when configuration and endpoints were
414 * changed
415 */
416
417 subs->sync_endpoint = NULL;
418 subs->data_endpoint->sync_master = NULL;
419 }
420
a60945fd
EZ		 421 err = set_sync_ep_implicit_fb_quirk(subs, dev, altsd, attr);
422 if (err < 0)
423 return err;
424
f34d0650
EZ		 425 if (altsd->bNumEndpoints < 2)
426 return 0;
c75a8a7a 427
395ae54b
PLB		 428 if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC ||
429 attr == USB_ENDPOINT_SYNC_ADAPTIVE)) ||
f34d0650
EZ		 430 (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE))
431 return 0;
edcd3633 432
395ae54b
PLB		 433 /*
434 * In case of illegal SYNC_NONE for OUT endpoint, we keep going to see
435 * if we don't find a sync endpoint, as on M-Audio Transit. In case of
436 * error fall back to SYNC mode and don't create sync endpoint
437 */
438
f34d0650
EZ		 439 /* check sync-pipe endpoint */
440 /* ... and check descriptor size before accessing bSynchAddress
441 because there is a version of the SB Audigy 2 NX firmware lacking
442 the audio fields in the endpoint descriptors */
443 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
444 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
95fec883 445 get_endpoint(alts, 1)->bSynchAddress != 0)) {
0ba41d91
TI		 446 dev_err(&dev->dev,
447 "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
448 fmt->iface, fmt->altsetting,
f34d0650
EZ		 449 get_endpoint(alts, 1)->bmAttributes,
450 get_endpoint(alts, 1)->bLength,
451 get_endpoint(alts, 1)->bSynchAddress);
395ae54b
PLB		 452 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
453 return 0;
f34d0650
EZ		 454 return -EINVAL;
455 }
456 ep = get_endpoint(alts, 1)->bEndpointAddress;
95fec883 457 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
f34d0650
EZ		 458 ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
459 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
0ba41d91
TI		 460 dev_err(&dev->dev,
461 "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
462 fmt->iface, fmt->altsetting,
f34d0650 463 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
395ae54b
PLB		 464 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
465 return 0;
f34d0650 466 return -EINVAL;
edcd3633 467 }
e5779998 468
f34d0650
EZ		 469 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
470 == USB_ENDPOINT_USAGE_IMPLICIT_FB;
471
472 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
473 alts, ep, !subs->direction,
474 implicit_fb ?
475 SND_USB_ENDPOINT_TYPE_DATA :
476 SND_USB_ENDPOINT_TYPE_SYNC);
395ae54b
PLB		 477 if (!subs->sync_endpoint) {
478 if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
479 return 0;
f34d0650 480 return -EINVAL;
395ae54b 481 }
f34d0650
EZ		 482
483 subs->data_endpoint->sync_master = subs->sync_endpoint;
484
71bb64c5
EZ		 485 return 0;
486}
487
488/*
489 * find a matching format and set up the interface
490 */
491static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
492{
493 struct usb_device *dev = subs->dev;
494 struct usb_host_interface *alts;
495 struct usb_interface_descriptor *altsd;
496 struct usb_interface *iface;
497 int err;
498
499 iface = usb_ifnum_to_if(dev, fmt->iface);
500 if (WARN_ON(!iface))
501 return -EINVAL;
b099b969 502 alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
71bb64c5
EZ		 503 altsd = get_iface_desc(alts);
504 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
505 return -EINVAL;
506
507 if (fmt == subs->cur_audiofmt)
508 return 0;
509
510 /* close the old interface */
511 if (subs->interface >= 0 && subs->interface != fmt->iface) {
8a463225
TI		 512 if (!subs->stream->chip->keep_iface) {
513 err = usb_set_interface(subs->dev, subs->interface, 0);
514 if (err < 0) {
515 dev_err(&dev->dev,
516 "%d:%d: return to setting 0 failed (%d)\n",
517 fmt->iface, fmt->altsetting, err);
518 return -EIO;
519 }
71bb64c5
EZ		 520 }
521 subs->interface = -1;
522 subs->altset_idx = 0;
523 }
524
525 /* set interface */
b099b969 526 if (iface->cur_altsetting != alts) {
6874daad
JK		 527 err = snd_usb_select_mode_quirk(subs, fmt);
528 if (err < 0)
529 return -EIO;
530
71bb64c5
EZ		 531 err = usb_set_interface(dev, fmt->iface, fmt->altsetting);
532 if (err < 0) {
0ba41d91
TI		 533 dev_err(&dev->dev,
534 "%d:%d: usb_set_interface failed (%d)\n",
535 fmt->iface, fmt->altsetting, err);
71bb64c5
EZ		 536 return -EIO;
537 }
0ba41d91
TI		 538 dev_dbg(&dev->dev, "setting usb interface %d:%d\n",
539 fmt->iface, fmt->altsetting);
71bb64c5
EZ		 540 snd_usb_set_interface_quirk(dev);
541 }
542
b099b969
TI		 543 subs->interface = fmt->iface;
544 subs->altset_idx = fmt->altset_idx;
71bb64c5
EZ		 545 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
546 alts, fmt->endpoint, subs->direction,
547 SND_USB_ENDPOINT_TYPE_DATA);
548
549 if (!subs->data_endpoint)
550 return -EINVAL;
551
552 err = set_sync_endpoint(subs, fmt, dev, alts, altsd);
553 if (err < 0)
554 return err;
555
d133f2c2
EZ		 556 err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt);
557 if (err < 0)
e5779998
DM		 558 return err;
559
560 subs->cur_audiofmt = fmt;
561
562 snd_usb_set_format_quirk(subs, fmt);
563
e5779998
DM		 564 return 0;
565}
566
0d9741c0
EZ		 567/*
568 * Return the score of matching two audioformats.
569 * Veto the audioformat if:
570 * - It has no channels for some reason.
571 * - Requested PCM format is not supported.
572 * - Requested sample rate is not supported.
573 */
0ba41d91
TI		 574static int match_endpoint_audioformats(struct snd_usb_substream *subs,
575 struct audioformat *fp,
576 struct audioformat *match, int rate,
577 snd_pcm_format_t pcm_format)
0d9741c0
EZ		 578{
579 int i;
580 int score = 0;
581
582 if (fp->channels < 1) {
0ba41d91
TI		 583 dev_dbg(&subs->dev->dev,
584 "%s: (fmt @%p) no channels\n", __func__, fp);
0d9741c0
EZ		 585 return 0;
586 }
587
74c34ca1 588 if (!(fp->formats & pcm_format_to_bits(pcm_format))) {
0ba41d91
TI		 589 dev_dbg(&subs->dev->dev,
590 "%s: (fmt @%p) no match for format %d\n", __func__,
0d9741c0
EZ		 591 fp, pcm_format);
592 return 0;
593 }
594
595 for (i = 0; i < fp->nr_rates; i++) {
596 if (fp->rate_table[i] == rate) {
597 score++;
598 break;
599 }
600 }
601 if (!score) {
0ba41d91
TI		 602 dev_dbg(&subs->dev->dev,
603 "%s: (fmt @%p) no match for rate %d\n", __func__,
0d9741c0
EZ		 604 fp, rate);
605 return 0;
606 }
607
608 if (fp->channels == match->channels)
609 score++;
610
0ba41d91
TI		 611 dev_dbg(&subs->dev->dev,
612 "%s: (fmt @%p) score %d\n", __func__, fp, score);
0d9741c0
EZ		 613
614 return score;
615}
616
617/*
618 * Configure the sync ep using the rate and pcm format of the data ep.
619 */
620static int configure_sync_endpoint(struct snd_usb_substream *subs)
621{
622 int ret;
623 struct audioformat *fp;
624 struct audioformat *sync_fp = NULL;
625 int cur_score = 0;
626 int sync_period_bytes = subs->period_bytes;
627 struct snd_usb_substream *sync_subs =
628 &subs->stream->substream[subs->direction ^ 1];
629
31be5425
TI		 630 if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA ||
631 !subs->stream)
632 return snd_usb_endpoint_set_params(subs->sync_endpoint,
633 subs->pcm_format,
634 subs->channels,
635 subs->period_bytes,
976b6c06 636 0, 0,
31be5425
TI		 637 subs->cur_rate,
638 subs->cur_audiofmt,
639 NULL);
640
0d9741c0
EZ		 641 /* Try to find the best matching audioformat. */
642 list_for_each_entry(fp, &sync_subs->fmt_list, list) {
0ba41d91
TI		 643 int score = match_endpoint_audioformats(subs,
644 fp, subs->cur_audiofmt,
0d9741c0
EZ		 645 subs->cur_rate, subs->pcm_format);
646
647 if (score > cur_score) {
648 sync_fp = fp;
649 cur_score = score;
650 }
651 }
652
653 if (unlikely(sync_fp == NULL)) {
0ba41d91
TI		 654 dev_err(&subs->dev->dev,
655 "%s: no valid audioformat for sync ep %x found\n",
0d9741c0
EZ		 656 __func__, sync_subs->ep_num);
657 return -EINVAL;
658 }
659
660 /*
661 * Recalculate the period bytes if channel number differ between
662 * data and sync ep audioformat.
663 */
664 if (sync_fp->channels != subs->channels) {
665 sync_period_bytes = (subs->period_bytes / subs->channels) *
666 sync_fp->channels;
0ba41d91
TI		 667 dev_dbg(&subs->dev->dev,
668 "%s: adjusted sync ep period bytes (%d -> %d)\n",
0d9741c0
EZ		 669 __func__, subs->period_bytes, sync_period_bytes);
670 }
671
672 ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
673 subs->pcm_format,
674 sync_fp->channels,
675 sync_period_bytes,
976b6c06 676 0, 0,
0d9741c0
EZ		 677 subs->cur_rate,
678 sync_fp,
679 NULL);
680
681 return ret;
682}
683
61a70950
DR		 684/*
685 * configure endpoint params
686 *
687 * called during initial setup and upon resume
688 */
689static int configure_endpoint(struct snd_usb_substream *subs)
690{
691 int ret;
692
61a70950 693 /* format changed */
b0db6063 694 stop_endpoints(subs, true);
61a70950
DR		 695 ret = snd_usb_endpoint_set_params(subs->data_endpoint,
696 subs->pcm_format,
697 subs->channels,
698 subs->period_bytes,
976b6c06
AS		 699 subs->period_frames,
700 subs->buffer_periods,
61a70950
DR		 701 subs->cur_rate,
702 subs->cur_audiofmt,
703 subs->sync_endpoint);
704 if (ret < 0)
978520b7 705 return ret;
61a70950
DR		 706
707 if (subs->sync_endpoint)
0d9741c0
EZ		 708 ret = configure_sync_endpoint(subs);
709
61a70950
DR		 710 return ret;
711}
712
e5779998
DM		 713/*
714 * hw_params callback
715 *
716 * allocate a buffer and set the given audio format.
717 *
718 * so far we use a physically linear buffer although packetize transfer
719 * doesn't need a continuous area.
720 * if sg buffer is supported on the later version of alsa, we'll follow
721 * that.
722 */
723static int snd_usb_hw_params(struct snd_pcm_substream *substream,
724 struct snd_pcm_hw_params *hw_params)
725{
726 struct snd_usb_substream *subs = substream->runtime->private_data;
727 struct audioformat *fmt;
61a70950 728 int ret;
e5779998
DM		 729
730 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
731 params_buffer_bytes(hw_params));
732 if (ret < 0)
c89178f5 733 return ret;
e5779998 734
61a70950
DR		 735 subs->pcm_format = params_format(hw_params);
736 subs->period_bytes = params_period_bytes(hw_params);
976b6c06
AS		 737 subs->period_frames = params_period_size(hw_params);
738 subs->buffer_periods = params_periods(hw_params);
61a70950
DR		 739 subs->channels = params_channels(hw_params);
740 subs->cur_rate = params_rate(hw_params);
741
742 fmt = find_format(subs);
e5779998 743 if (!fmt) {
0ba41d91
TI		 744 dev_dbg(&subs->dev->dev,
745 "cannot set format: format = %#x, rate = %d, channels = %d\n",
61a70950 746 subs->pcm_format, subs->cur_rate, subs->channels);
c89178f5 747 return -EINVAL;
e5779998
DM		 748 }
749
47ab1545
TI		 750 ret = snd_usb_lock_shutdown(subs->stream->chip);
751 if (ret < 0)
c89178f5 752 return ret;
47ab1545
TI		 753 ret = set_format(subs, fmt);
754 snd_usb_unlock_shutdown(subs->stream->chip);
978520b7 755 if (ret < 0)
c89178f5 756 return ret;
e5779998 757
61a70950
DR		 758 subs->interface = fmt->iface;
759 subs->altset_idx = fmt->altset_idx;
384dc085 760 subs->need_setup_ep = true;
715a1705 761
61a70950 762 return 0;
e5779998
DM		 763}
764
765/*
766 * hw_free callback
767 *
768 * reset the audio format and release the buffer
769 */
770static int snd_usb_hw_free(struct snd_pcm_substream *substream)
771{
772 struct snd_usb_substream *subs = substream->runtime->private_data;
773
774 subs->cur_audiofmt = NULL;
775 subs->cur_rate = 0;
776 subs->period_bytes = 0;
47ab1545 777 if (!snd_usb_lock_shutdown(subs->stream->chip)) {
a9bb3626 778 stop_endpoints(subs, true);
26de5d0a
EZ		 779 snd_usb_endpoint_deactivate(subs->sync_endpoint);
780 snd_usb_endpoint_deactivate(subs->data_endpoint);
47ab1545 781 snd_usb_unlock_shutdown(subs->stream->chip);
978520b7 782 }
e5779998
DM		 783 return snd_pcm_lib_free_vmalloc_buffer(substream);
784}
785
786/*
787 * prepare callback
788 *
789 * only a few subtle things...
790 */
791static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
792{
793 struct snd_pcm_runtime *runtime = substream->runtime;
794 struct snd_usb_substream *subs = runtime->private_data;
61a70950
DR		 795 struct usb_host_interface *alts;
796 struct usb_interface *iface;
797 int ret;
e5779998
DM		 798
799 if (! subs->cur_audiofmt) {
0ba41d91 800 dev_err(&subs->dev->dev, "no format is specified!\n");
e5779998
DM		 801 return -ENXIO;
802 }
803
47ab1545
TI		 804 ret = snd_usb_lock_shutdown(subs->stream->chip);
805 if (ret < 0)
806 return ret;
978520b7
TI		 807 if (snd_BUG_ON(!subs->data_endpoint)) {
808 ret = -EIO;
809 goto unlock;
810 }
edcd3633 811
f58161ba
TI		 812 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
813 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
814
61a70950
DR		 815 ret = set_format(subs, subs->cur_audiofmt);
816 if (ret < 0)
978520b7 817 goto unlock;
61a70950 818
384dc085 819 if (subs->need_setup_ep) {
1e2e3fe4
DG		 820
821 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface);
822 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx];
823 ret = snd_usb_init_sample_rate(subs->stream->chip,
824 subs->cur_audiofmt->iface,
825 alts,
826 subs->cur_audiofmt,
827 subs->cur_rate);
828 if (ret < 0)
829 goto unlock;
830
384dc085
TI		 831 ret = configure_endpoint(subs);
832 if (ret < 0)
978520b7 833 goto unlock;
384dc085
TI		 834 subs->need_setup_ep = false;
835 }
61a70950 836
e5779998 837 /* some unit conversions in runtime */
edcd3633
DM		 838 subs->data_endpoint->maxframesize =
839 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
840 subs->data_endpoint->curframesize =
841 bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
e5779998
DM		 842
843 /* reset the pointer */
844 subs->hwptr_done = 0;
845 subs->transfer_done = 0;
294c4fb8
PLB		 846 subs->last_delay = 0;
847 subs->last_frame_number = 0;
e5779998
DM		 848 runtime->delay = 0;
849
edcd3633
DM		 850 /* for playback, submit the URBs now; otherwise, the first hwptr_done
851 * updates for all URBs would happen at the same time when starting */
852 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
1d0f9530 853 ret = start_endpoints(subs);
edcd3633 854
978520b7 855 unlock:
47ab1545 856 snd_usb_unlock_shutdown(subs->stream->chip);
978520b7 857 return ret;
e5779998
DM		 858}
859
aaffbf78 860static const struct snd_pcm_hardware snd_usb_hardware =
e5779998
DM		 861{
862 .info = SNDRV_PCM_INFO_MMAP |
863 SNDRV_PCM_INFO_MMAP_VALID |
864 SNDRV_PCM_INFO_BATCH |
865 SNDRV_PCM_INFO_INTERLEAVED |
866 SNDRV_PCM_INFO_BLOCK_TRANSFER |
867 SNDRV_PCM_INFO_PAUSE,
868 .buffer_bytes_max = 1024 * 1024,
869 .period_bytes_min = 64,
870 .period_bytes_max = 512 * 1024,
871 .periods_min = 2,
872 .periods_max = 1024,
873};
874
875static int hw_check_valid_format(struct snd_usb_substream *subs,
876 struct snd_pcm_hw_params *params,
877 struct audioformat *fp)
878{
879 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
880 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
881 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
882 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
015eb0b0 883 struct snd_mask check_fmts;
e5779998
DM		 884 unsigned int ptime;
885
886 /* check the format */
015eb0b0
CL		 887 snd_mask_none(&check_fmts);
888 check_fmts.bits[0] = (u32)fp->formats;
889 check_fmts.bits[1] = (u32)(fp->formats >> 32);
890 snd_mask_intersect(&check_fmts, fmts);
891 if (snd_mask_empty(&check_fmts)) {
e5779998
DM		 892 hwc_debug(" > check: no supported format %d\n", fp->format);
893 return 0;
894 }
895 /* check the channels */
896 if (fp->channels < ct->min || fp->channels > ct->max) {
897 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
898 return 0;
899 }
900 /* check the rate is within the range */
901 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
902 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
903 return 0;
904 }
905 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
906 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
907 return 0;
908 }
909 /* check whether the period time is >= the data packet interval */
978520b7 910 if (subs->speed != USB_SPEED_FULL) {
e5779998
DM		 911 ptime = 125 * (1 << fp->datainterval);
912 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
913 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
914 return 0;
915 }
916 }
917 return 1;
918}
919
920static int hw_rule_rate(struct snd_pcm_hw_params *params,
921 struct snd_pcm_hw_rule *rule)
922{
923 struct snd_usb_substream *subs = rule->private;
88766f04 924 struct audioformat *fp;
e5779998
DM		 925 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
926 unsigned int rmin, rmax;
927 int changed;
928
929 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
930 changed = 0;
931 rmin = rmax = 0;
88766f04 932 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 933 if (!hw_check_valid_format(subs, params, fp))
934 continue;
935 if (changed++) {
936 if (rmin > fp->rate_min)
937 rmin = fp->rate_min;
938 if (rmax < fp->rate_max)
939 rmax = fp->rate_max;
940 } else {
941 rmin = fp->rate_min;
942 rmax = fp->rate_max;
943 }
944 }
945
946 if (!changed) {
947 hwc_debug(" --> get empty\n");
948 it->empty = 1;
949 return -EINVAL;
950 }
951
952 changed = 0;
953 if (it->min < rmin) {
954 it->min = rmin;
955 it->openmin = 0;
956 changed = 1;
957 }
958 if (it->max > rmax) {
959 it->max = rmax;
960 it->openmax = 0;
961 changed = 1;
962 }
963 if (snd_interval_checkempty(it)) {
964 it->empty = 1;
965 return -EINVAL;
966 }
967 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
968 return changed;
969}
970
971
972static int hw_rule_channels(struct snd_pcm_hw_params *params,
973 struct snd_pcm_hw_rule *rule)
974{
975 struct snd_usb_substream *subs = rule->private;
88766f04 976 struct audioformat *fp;
e5779998
DM		 977 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
978 unsigned int rmin, rmax;
979 int changed;
980
981 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
982 changed = 0;
983 rmin = rmax = 0;
88766f04 984 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 985 if (!hw_check_valid_format(subs, params, fp))
986 continue;
987 if (changed++) {
988 if (rmin > fp->channels)
989 rmin = fp->channels;
990 if (rmax < fp->channels)
991 rmax = fp->channels;
992 } else {
993 rmin = fp->channels;
994 rmax = fp->channels;
995 }
996 }
997
998 if (!changed) {
999 hwc_debug(" --> get empty\n");
1000 it->empty = 1;
1001 return -EINVAL;
1002 }
1003
1004 changed = 0;
1005 if (it->min < rmin) {
1006 it->min = rmin;
1007 it->openmin = 0;
1008 changed = 1;
1009 }
1010 if (it->max > rmax) {
1011 it->max = rmax;
1012 it->openmax = 0;
1013 changed = 1;
1014 }
1015 if (snd_interval_checkempty(it)) {
1016 it->empty = 1;
1017 return -EINVAL;
1018 }
1019 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1020 return changed;
1021}
1022
1023static int hw_rule_format(struct snd_pcm_hw_params *params,
1024 struct snd_pcm_hw_rule *rule)
1025{
1026 struct snd_usb_substream *subs = rule->private;
88766f04 1027 struct audioformat *fp;
e5779998
DM		 1028 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1029 u64 fbits;
1030 u32 oldbits[2];
1031 int changed;
1032
1033 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1034 fbits = 0;
88766f04 1035 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 1036 if (!hw_check_valid_format(subs, params, fp))
1037 continue;
015eb0b0 1038 fbits |= fp->formats;
e5779998
DM		 1039 }
1040
1041 oldbits[0] = fmt->bits[0];
1042 oldbits[1] = fmt->bits[1];
1043 fmt->bits[0] &= (u32)fbits;
1044 fmt->bits[1] &= (u32)(fbits >> 32);
1045 if (!fmt->bits[0] && !fmt->bits[1]) {
1046 hwc_debug(" --> get empty\n");
1047 return -EINVAL;
1048 }
1049 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1050 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1051 return changed;
1052}
1053
1054static int hw_rule_period_time(struct snd_pcm_hw_params *params,
1055 struct snd_pcm_hw_rule *rule)
1056{
1057 struct snd_usb_substream *subs = rule->private;
1058 struct audioformat *fp;
1059 struct snd_interval *it;
1060 unsigned char min_datainterval;
1061 unsigned int pmin;
1062 int changed;
1063
1064 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
1065 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
1066 min_datainterval = 0xff;
1067 list_for_each_entry(fp, &subs->fmt_list, list) {
1068 if (!hw_check_valid_format(subs, params, fp))
1069 continue;
1070 min_datainterval = min(min_datainterval, fp->datainterval);
1071 }
1072 if (min_datainterval == 0xff) {
a7ce2e0d 1073 hwc_debug(" --> get empty\n");
e5779998
DM		 1074 it->empty = 1;
1075 return -EINVAL;
1076 }
1077 pmin = 125 * (1 << min_datainterval);
1078 changed = 0;
1079 if (it->min < pmin) {
1080 it->min = pmin;
1081 it->openmin = 0;
1082 changed = 1;
1083 }
1084 if (snd_interval_checkempty(it)) {
1085 it->empty = 1;
1086 return -EINVAL;
1087 }
1088 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
1089 return changed;
1090}
1091
1092/*
1093 * If the device supports unusual bit rates, does the request meet these?
1094 */
1095static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1096 struct snd_usb_substream *subs)
1097{
1098 struct audioformat *fp;
0717d0f5 1099 int *rate_list;
e5779998
DM		 1100 int count = 0, needs_knot = 0;
1101 int err;
1102
5cd5d7c4
CL		 1103 kfree(subs->rate_list.list);
1104 subs->rate_list.list = NULL;
1105
e5779998
DM		 1106 list_for_each_entry(fp, &subs->fmt_list, list) {
1107 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1108 return 0;
1109 count += fp->nr_rates;
1110 if (fp->rates & SNDRV_PCM_RATE_KNOT)
1111 needs_knot = 1;
1112 }
1113 if (!needs_knot)
1114 return 0;
1115
0717d0f5
TI		 1116 subs->rate_list.list = rate_list =
1117 kmalloc(sizeof(int) * count, GFP_KERNEL);
8a8d56b2
JJ		 1118 if (!subs->rate_list.list)
1119 return -ENOMEM;
1120 subs->rate_list.count = count;
e5779998
DM		 1121 subs->rate_list.mask = 0;
1122 count = 0;
1123 list_for_each_entry(fp, &subs->fmt_list, list) {
1124 int i;
1125 for (i = 0; i < fp->nr_rates; i++)
0717d0f5 1126 rate_list[count++] = fp->rate_table[i];
e5779998
DM		 1127 }
1128 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1129 &subs->rate_list);
1130 if (err < 0)
1131 return err;
1132
1133 return 0;
1134}
1135
1136
1137/*
1138 * set up the runtime hardware information.
1139 */
1140
1141static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1142{
88766f04 1143 struct audioformat *fp;
e5779998
DM		 1144 unsigned int pt, ptmin;
1145 int param_period_time_if_needed;
1146 int err;
1147
1148 runtime->hw.formats = subs->formats;
1149
1150 runtime->hw.rate_min = 0x7fffffff;
1151 runtime->hw.rate_max = 0;
1152 runtime->hw.channels_min = 256;
1153 runtime->hw.channels_max = 0;
1154 runtime->hw.rates = 0;
1155 ptmin = UINT_MAX;
1156 /* check min/max rates and channels */
88766f04 1157 list_for_each_entry(fp, &subs->fmt_list, list) {
e5779998
DM		 1158 runtime->hw.rates |= fp->rates;
1159 if (runtime->hw.rate_min > fp->rate_min)
1160 runtime->hw.rate_min = fp->rate_min;
1161 if (runtime->hw.rate_max < fp->rate_max)
1162 runtime->hw.rate_max = fp->rate_max;
1163 if (runtime->hw.channels_min > fp->channels)
1164 runtime->hw.channels_min = fp->channels;
1165 if (runtime->hw.channels_max < fp->channels)
1166 runtime->hw.channels_max = fp->channels;
1167 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
1168 /* FIXME: there might be more than one audio formats... */
1169 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1170 fp->frame_size;
1171 }
1172 pt = 125 * (1 << fp->datainterval);
1173 ptmin = min(ptmin, pt);
1174 }
88a8516a
ON		 1175 err = snd_usb_autoresume(subs->stream->chip);
1176 if (err < 0)
1177 return err;
e5779998
DM		 1178
1179 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
978520b7 1180 if (subs->speed == USB_SPEED_FULL)
e5779998
DM		 1181 /* full speed devices have fixed data packet interval */
1182 ptmin = 1000;
1183 if (ptmin == 1000)
1184 /* if period time doesn't go below 1 ms, no rules needed */
1185 param_period_time_if_needed = -1;
1186 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1187 ptmin, UINT_MAX);
1188
1189 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1190 hw_rule_rate, subs,
1191 SNDRV_PCM_HW_PARAM_FORMAT,
1192 SNDRV_PCM_HW_PARAM_CHANNELS,
1193 param_period_time_if_needed,
1194 -1)) < 0)
88a8516a 1195 goto rep_err;
e5779998
DM		 1196 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1197 hw_rule_channels, subs,
1198 SNDRV_PCM_HW_PARAM_FORMAT,
1199 SNDRV_PCM_HW_PARAM_RATE,
1200 param_period_time_if_needed,
1201 -1)) < 0)
88a8516a 1202 goto rep_err;
e5779998
DM		 1203 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1204 hw_rule_format, subs,
1205 SNDRV_PCM_HW_PARAM_RATE,
1206 SNDRV_PCM_HW_PARAM_CHANNELS,
1207 param_period_time_if_needed,
1208 -1)) < 0)
88a8516a 1209 goto rep_err;
e5779998
DM		 1210 if (param_period_time_if_needed >= 0) {
1211 err = snd_pcm_hw_rule_add(runtime, 0,
1212 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1213 hw_rule_period_time, subs,
1214 SNDRV_PCM_HW_PARAM_FORMAT,
1215 SNDRV_PCM_HW_PARAM_CHANNELS,
1216 SNDRV_PCM_HW_PARAM_RATE,
1217 -1);
1218 if (err < 0)
88a8516a 1219 goto rep_err;
e5779998
DM		 1220 }
1221 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
88a8516a 1222 goto rep_err;
e5779998 1223 return 0;
88a8516a
ON		 1224
1225rep_err:
1226 snd_usb_autosuspend(subs->stream->chip);
1227 return err;
e5779998
DM		 1228}
1229
1230static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1231{
1232 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1233 struct snd_pcm_runtime *runtime = substream->runtime;
1234 struct snd_usb_substream *subs = &as->substream[direction];
1235
1236 subs->interface = -1;
e11b4e0e 1237 subs->altset_idx = 0;
e5779998
DM		 1238 runtime->hw = snd_usb_hardware;
1239 runtime->private_data = subs;
1240 subs->pcm_substream = substream;
88a8516a 1241 /* runtime PM is also done there */
d24f5061
DM		 1242
1243 /* initialize DSD/DOP context */
1244 subs->dsd_dop.byte_idx = 0;
1245 subs->dsd_dop.channel = 0;
1246 subs->dsd_dop.marker = 1;
1247
c89178f5 1248 return setup_hw_info(runtime, subs);
e5779998
DM		 1249}
1250
1251static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1252{
1253 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1254 struct snd_usb_substream *subs = &as->substream[direction];
1255
b0db6063 1256 stop_endpoints(subs, true);
68e67f40 1257
8a463225
TI		 1258 if (!as->chip->keep_iface &&
1259 subs->interface >= 0 &&
47ab1545 1260 !snd_usb_lock_shutdown(subs->stream->chip)) {
68e67f40
DM		 1261 usb_set_interface(subs->dev, subs->interface, 0);
1262 subs->interface = -1;
47ab1545 1263 snd_usb_unlock_shutdown(subs->stream->chip);
68e67f40
DM		 1264 }
1265
e5779998 1266 subs->pcm_substream = NULL;
88a8516a 1267 snd_usb_autosuspend(subs->stream->chip);
edcd3633 1268
68e67f40 1269 return 0;
edcd3633
DM		 1270}
1271
1272/* Since a URB can handle only a single linear buffer, we must use double
1273 * buffering when the data to be transferred overflows the buffer boundary.
1274 * To avoid inconsistencies when updating hwptr_done, we use double buffering
1275 * for all URBs.
1276 */
1277static void retire_capture_urb(struct snd_usb_substream *subs,
1278 struct urb *urb)
1279{
1280 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1281 unsigned int stride, frames, bytes, oldptr;
1282 int i, period_elapsed = 0;
1283 unsigned long flags;
1284 unsigned char *cp;
e4cc6153
PLB		 1285 int current_frame_number;
1286
1287 /* read frame number here, update pointer in critical section */
1288 current_frame_number = usb_get_current_frame_number(subs->dev);
edcd3633
DM		 1289
1290 stride = runtime->frame_bits >> 3;
1291
1292 for (i = 0; i < urb->number_of_packets; i++) {
1539d4f8 1293 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj;
edcd3633 1294 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
0ba41d91
TI		 1295 dev_dbg(&subs->dev->dev, "frame %d active: %d\n",
1296 i, urb->iso_frame_desc[i].status);
edcd3633
DM		 1297 // continue;
1298 }
1299 bytes = urb->iso_frame_desc[i].actual_length;
1300 frames = bytes / stride;
1301 if (!subs->txfr_quirk)
1302 bytes = frames * stride;
1303 if (bytes % (runtime->sample_bits >> 3) != 0) {
edcd3633 1304 int oldbytes = bytes;
edcd3633 1305 bytes = frames * stride;
0ba41d91
TI		 1306 dev_warn(&subs->dev->dev,
1307 "Corrected urb data len. %d->%d\n",
edcd3633
DM		 1308 oldbytes, bytes);
1309 }
1310 /* update the current pointer */
1311 spin_lock_irqsave(&subs->lock, flags);
1312 oldptr = subs->hwptr_done;
1313 subs->hwptr_done += bytes;
1314 if (subs->hwptr_done >= runtime->buffer_size * stride)
1315 subs->hwptr_done -= runtime->buffer_size * stride;
1316 frames = (bytes + (oldptr % stride)) / stride;
1317 subs->transfer_done += frames;
1318 if (subs->transfer_done >= runtime->period_size) {
1319 subs->transfer_done -= runtime->period_size;
1320 period_elapsed = 1;
1321 }
e4cc6153
PLB		 1322 /* capture delay is by construction limited to one URB,
1323 * reset delays here
1324 */
1325 runtime->delay = subs->last_delay = 0;
1326
1327 /* realign last_frame_number */
1328 subs->last_frame_number = current_frame_number;
1329 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1330
edcd3633
DM		 1331 spin_unlock_irqrestore(&subs->lock, flags);
1332 /* copy a data chunk */
1333 if (oldptr + bytes > runtime->buffer_size * stride) {
1334 unsigned int bytes1 =
1335 runtime->buffer_size * stride - oldptr;
1336 memcpy(runtime->dma_area + oldptr, cp, bytes1);
1337 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1338 } else {
1339 memcpy(runtime->dma_area + oldptr, cp, bytes);
1340 }
1341 }
1342
1343 if (period_elapsed)
1344 snd_pcm_period_elapsed(subs->pcm_substream);
1345}
1346
d24f5061
DM		 1347static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs,
1348 struct urb *urb, unsigned int bytes)
1349{
1350 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1351 unsigned int stride = runtime->frame_bits >> 3;
1352 unsigned int dst_idx = 0;
1353 unsigned int src_idx = subs->hwptr_done;
1354 unsigned int wrap = runtime->buffer_size * stride;
1355 u8 *dst = urb->transfer_buffer;
1356 u8 *src = runtime->dma_area;
1357 u8 marker[] = { 0x05, 0xfa };
1358
1359 /*
1360 * The DSP DOP format defines a way to transport DSD samples over
1361 * normal PCM data endpoints. It requires stuffing of marker bytes
1362 * (0x05 and 0xfa, alternating per sample frame), and then expects
1363 * 2 additional bytes of actual payload. The whole frame is stored
1364 * LSB.
1365 *
1366 * Hence, for a stereo transport, the buffer layout looks like this,
1367 * where L refers to left channel samples and R to right.
1368 *
1369 * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa
1370 * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa
1371 * .....
1372 *
1373 */
1374
1375 while (bytes--) {
1376 if (++subs->dsd_dop.byte_idx == 3) {
1377 /* frame boundary? */
1378 dst[dst_idx++] = marker[subs->dsd_dop.marker];
1379 src_idx += 2;
1380 subs->dsd_dop.byte_idx = 0;
1381
1382 if (++subs->dsd_dop.channel % runtime->channels == 0) {
1383 /* alternate the marker */
1384 subs->dsd_dop.marker++;
1385 subs->dsd_dop.marker %= ARRAY_SIZE(marker);
1386 subs->dsd_dop.channel = 0;
1387 }
1388 } else {
1389 /* stuff the DSD payload */
1390 int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap;
44dcbbb1
DM		 1391
1392 if (subs->cur_audiofmt->dsd_bitrev)
1393 dst[dst_idx++] = bitrev8(src[idx]);
1394 else
1395 dst[dst_idx++] = src[idx];
1396
d24f5061
DM		 1397 subs->hwptr_done++;
1398 }
1399 }
4c4e4391
RW		 1400 if (subs->hwptr_done >= runtime->buffer_size * stride)
1401 subs->hwptr_done -= runtime->buffer_size * stride;
d24f5061
DM		 1402}
1403
b97a9369
RW		 1404static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb,
1405 int offset, int stride, unsigned int bytes)
07a40c2f
RW		 1406{
1407 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1408
1409 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
1410 /* err, the transferred area goes over buffer boundary. */
1411 unsigned int bytes1 =
1412 runtime->buffer_size * stride - subs->hwptr_done;
b97a9369 1413 memcpy(urb->transfer_buffer + offset,
07a40c2f 1414 runtime->dma_area + subs->hwptr_done, bytes1);
b97a9369 1415 memcpy(urb->transfer_buffer + offset + bytes1,
07a40c2f
RW		 1416 runtime->dma_area, bytes - bytes1);
1417 } else {
b97a9369 1418 memcpy(urb->transfer_buffer + offset,
07a40c2f
RW		 1419 runtime->dma_area + subs->hwptr_done, bytes);
1420 }
1421 subs->hwptr_done += bytes;
4c4e4391
RW		 1422 if (subs->hwptr_done >= runtime->buffer_size * stride)
1423 subs->hwptr_done -= runtime->buffer_size * stride;
07a40c2f
RW		 1424}
1425
e0570446
RW		 1426static unsigned int copy_to_urb_quirk(struct snd_usb_substream *subs,
1427 struct urb *urb, int stride,
1428 unsigned int bytes)
1429{
1430 __le32 packet_length;
1431 int i;
1432
1433 /* Put __le32 length descriptor at start of each packet. */
1434 for (i = 0; i < urb->number_of_packets; i++) {
1435 unsigned int length = urb->iso_frame_desc[i].length;
1436 unsigned int offset = urb->iso_frame_desc[i].offset;
1437
1438 packet_length = cpu_to_le32(length);
1439 offset += i * sizeof(packet_length);
1440 urb->iso_frame_desc[i].offset = offset;
1441 urb->iso_frame_desc[i].length += sizeof(packet_length);
1442 memcpy(urb->transfer_buffer + offset,
1443 &packet_length, sizeof(packet_length));
1444 copy_to_urb(subs, urb, offset + sizeof(packet_length),
1445 stride, length);
1446 }
1447 /* Adjust transfer size accordingly. */
1448 bytes += urb->number_of_packets * sizeof(packet_length);
1449 return bytes;
1450}
1451
edcd3633
DM		 1452static void prepare_playback_urb(struct snd_usb_substream *subs,
1453 struct urb *urb)
1454{
1455 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
245baf98 1456 struct snd_usb_endpoint *ep = subs->data_endpoint;
edcd3633
DM		 1457 struct snd_urb_ctx *ctx = urb->context;
1458 unsigned int counts, frames, bytes;
1459 int i, stride, period_elapsed = 0;
1460 unsigned long flags;
1461
1462 stride = runtime->frame_bits >> 3;
1463
1464 frames = 0;
1465 urb->number_of_packets = 0;
1466 spin_lock_irqsave(&subs->lock, flags);
976b6c06 1467 subs->frame_limit += ep->max_urb_frames;
edcd3633 1468 for (i = 0; i < ctx->packets; i++) {
245baf98
DM		 1469 if (ctx->packet_size[i])
1470 counts = ctx->packet_size[i];
1471 else
1472 counts = snd_usb_endpoint_next_packet_size(ep);
1473
edcd3633 1474 /* set up descriptor */
8a2a74d2
DM		 1475 urb->iso_frame_desc[i].offset = frames * ep->stride;
1476 urb->iso_frame_desc[i].length = counts * ep->stride;
edcd3633
DM		 1477 frames += counts;
1478 urb->number_of_packets++;
1479 subs->transfer_done += counts;
1480 if (subs->transfer_done >= runtime->period_size) {
1481 subs->transfer_done -= runtime->period_size;
976b6c06 1482 subs->frame_limit = 0;
edcd3633
DM		 1483 period_elapsed = 1;
1484 if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1485 if (subs->transfer_done > 0) {
1486 /* FIXME: fill-max mode is not
1487 * supported yet */
1488 frames -= subs->transfer_done;
1489 counts -= subs->transfer_done;
1490 urb->iso_frame_desc[i].length =
8a2a74d2 1491 counts * ep->stride;
edcd3633
DM		 1492 subs->transfer_done = 0;
1493 }
1494 i++;
1495 if (i < ctx->packets) {
1496 /* add a transfer delimiter */
1497 urb->iso_frame_desc[i].offset =
8a2a74d2 1498 frames * ep->stride;
edcd3633
DM		 1499 urb->iso_frame_desc[i].length = 0;
1500 urb->number_of_packets++;
1501 }
1502 break;
1503 }
1504 }
976b6c06
AS		 1505 /* finish at the period boundary or after enough frames */
1506 if ((period_elapsed ||
1507 subs->transfer_done >= subs->frame_limit) &&
1508 !snd_usb_endpoint_implicit_feedback_sink(ep))
edcd3633
DM		 1509 break;
1510 }
8a2a74d2 1511 bytes = frames * ep->stride;
d24f5061
DM		 1512
1513 if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE &&
1514 subs->cur_audiofmt->dsd_dop)) {
1515 fill_playback_urb_dsd_dop(subs, urb, bytes);
44dcbbb1
DM		 1516 } else if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U8 &&
1517 subs->cur_audiofmt->dsd_bitrev)) {
1518 /* bit-reverse the bytes */
1519 u8 *buf = urb->transfer_buffer;
1520 for (i = 0; i < bytes; i++) {
1521 int idx = (subs->hwptr_done + i)
1522 % (runtime->buffer_size * stride);
1523 buf[i] = bitrev8(runtime->dma_area[idx]);
1524 }
1525
1526 subs->hwptr_done += bytes;
4c4e4391
RW		 1527 if (subs->hwptr_done >= runtime->buffer_size * stride)
1528 subs->hwptr_done -= runtime->buffer_size * stride;
edcd3633 1529 } else {
d24f5061 1530 /* usual PCM */
e0570446
RW		 1531 if (!subs->tx_length_quirk)
1532 copy_to_urb(subs, urb, 0, stride, bytes);
1533 else
1534 bytes = copy_to_urb_quirk(subs, urb, stride, bytes);
1535 /* bytes is now amount of outgoing data */
edcd3633 1536 }
d24f5061 1537
fbcfbf5f
DM		 1538 /* update delay with exact number of samples queued */
1539 runtime->delay = subs->last_delay;
edcd3633 1540 runtime->delay += frames;
fbcfbf5f
DM		 1541 subs->last_delay = runtime->delay;
1542
1543 /* realign last_frame_number */
1544 subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1545 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1546
ea33d359
PLB		 1547 if (subs->trigger_tstamp_pending_update) {
1548 /* this is the first actual URB submitted,
1549 * update trigger timestamp to reflect actual start time
1550 */
1551 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1552 subs->trigger_tstamp_pending_update = false;
1553 }
1554
edcd3633
DM		 1555 spin_unlock_irqrestore(&subs->lock, flags);
1556 urb->transfer_buffer_length = bytes;
1557 if (period_elapsed)
1558 snd_pcm_period_elapsed(subs->pcm_substream);
1559}
1560
1561/*
1562 * process after playback data complete
1563 * - decrease the delay count again
1564 */
1565static void retire_playback_urb(struct snd_usb_substream *subs,
1566 struct urb *urb)
1567{
1568 unsigned long flags;
1569 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
8a2a74d2
DM		 1570 struct snd_usb_endpoint *ep = subs->data_endpoint;
1571 int processed = urb->transfer_buffer_length / ep->stride;
fbcfbf5f 1572 int est_delay;
edcd3633 1573
1213a205
TI		 1574 /* ignore the delay accounting when procssed=0 is given, i.e.
1575 * silent payloads are procssed before handling the actual data
1576 */
1577 if (!processed)
1578 return;
1579
edcd3633 1580 spin_lock_irqsave(&subs->lock, flags);
48779a0b
TI		 1581 if (!subs->last_delay)
1582 goto out; /* short path */
1583
fbcfbf5f
DM		 1584 est_delay = snd_usb_pcm_delay(subs, runtime->rate);
1585 /* update delay with exact number of samples played */
1586 if (processed > subs->last_delay)
1587 subs->last_delay = 0;
edcd3633 1588 else
fbcfbf5f
DM		 1589 subs->last_delay -= processed;
1590 runtime->delay = subs->last_delay;
1591
1592 /*
1593 * Report when delay estimate is off by more than 2ms.
1594 * The error should be lower than 2ms since the estimate relies
1595 * on two reads of a counter updated every ms.
1596 */
b7a77235
SE		 1597 if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
1598 dev_dbg_ratelimited(&subs->dev->dev,
0ba41d91 1599 "delay: estimated %d, actual %d\n",
fbcfbf5f
DM		 1600 est_delay, subs->last_delay);
1601
48779a0b
TI		 1602 if (!subs->running) {
1603 /* update last_frame_number for delay counting here since
1604 * prepare_playback_urb won't be called during pause
1605 */
1606 subs->last_frame_number =
1607 usb_get_current_frame_number(subs->dev) & 0xff;
1608 }
1609
1610 out:
edcd3633 1611 spin_unlock_irqrestore(&subs->lock, flags);
e5779998
DM		 1612}
1613
1614static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1615{
1616 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1617}
1618
1619static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1620{
1621 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1622}
1623
1624static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1625{
1626 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1627}
1628
1629static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1630{
1631 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1632}
1633
edcd3633
DM		 1634static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1635 int cmd)
1636{
1637 struct snd_usb_substream *subs = substream->runtime->private_data;
1638
1639 switch (cmd) {
1640 case SNDRV_PCM_TRIGGER_START:
ea33d359 1641 subs->trigger_tstamp_pending_update = true;
edcd3633
DM		 1642 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1643 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
1644 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1645 subs->running = 1;
edcd3633
DM		 1646 return 0;
1647 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1648 stop_endpoints(subs, false);
97f8d3b6 1649 subs->running = 0;
edcd3633
DM		 1650 return 0;
1651 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1652 subs->data_endpoint->prepare_data_urb = NULL;
48779a0b
TI		 1653 /* keep retire_data_urb for delay calculation */
1654 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1655 subs->running = 0;
edcd3633
DM		 1656 return 0;
1657 }
1658
1659 return -EINVAL;
1660}
1661
afe25967
DM		 1662static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream,
1663 int cmd)
edcd3633
DM		 1664{
1665 int err;
1666 struct snd_usb_substream *subs = substream->runtime->private_data;
1667
1668 switch (cmd) {
1669 case SNDRV_PCM_TRIGGER_START:
1d0f9530 1670 err = start_endpoints(subs);
edcd3633
DM		 1671 if (err < 0)
1672 return err;
1673
1674 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1675 subs->running = 1;
edcd3633
DM		 1676 return 0;
1677 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1678 stop_endpoints(subs, false);
97f8d3b6 1679 subs->running = 0;
edcd3633
DM		 1680 return 0;
1681 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1682 subs->data_endpoint->retire_data_urb = NULL;
97f8d3b6 1683 subs->running = 0;
edcd3633
DM		 1684 return 0;
1685 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1686 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1687 subs->running = 1;
edcd3633
DM		 1688 return 0;
1689 }
1690
1691 return -EINVAL;
1692}
1693
31cb1fb4 1694static const struct snd_pcm_ops snd_usb_playback_ops = {
e5779998
DM		 1695 .open = snd_usb_playback_open,
1696 .close = snd_usb_playback_close,
1697 .ioctl = snd_pcm_lib_ioctl,
1698 .hw_params = snd_usb_hw_params,
1699 .hw_free = snd_usb_hw_free,
1700 .prepare = snd_usb_pcm_prepare,
1701 .trigger = snd_usb_substream_playback_trigger,
1702 .pointer = snd_usb_pcm_pointer,
1703 .page = snd_pcm_lib_get_vmalloc_page,
1704 .mmap = snd_pcm_lib_mmap_vmalloc,
1705};
1706
31cb1fb4 1707static const struct snd_pcm_ops snd_usb_capture_ops = {
e5779998
DM		 1708 .open = snd_usb_capture_open,
1709 .close = snd_usb_capture_close,
1710 .ioctl = snd_pcm_lib_ioctl,
1711 .hw_params = snd_usb_hw_params,
1712 .hw_free = snd_usb_hw_free,
1713 .prepare = snd_usb_pcm_prepare,
1714 .trigger = snd_usb_substream_capture_trigger,
1715 .pointer = snd_usb_pcm_pointer,
1716 .page = snd_pcm_lib_get_vmalloc_page,
1717 .mmap = snd_pcm_lib_mmap_vmalloc,
1718};
1719
1720void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1721{
1722 snd_pcm_set_ops(pcm, stream,
1723 stream == SNDRV_PCM_STREAM_PLAYBACK ?
1724 &snd_usb_playback_ops : &snd_usb_capture_ops);
1725}
Linux 6.x block layer and io_uring tree(s)