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ALSA: usb-audio: Fix missing autopm for MIDI input
[deliverable/linux.git] / sound / usb / pcm.c
CommitLineData
e5779998
DM		 1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 */
16
17#include <linux/init.h>
9966ddaf 18#include <linux/slab.h>
edcd3633 19#include <linux/ratelimit.h>
e5779998
DM		 20#include <linux/usb.h>
21#include <linux/usb/audio.h>
7e847894 22#include <linux/usb/audio-v2.h>
e5779998
DM		 23
24#include <sound/core.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27
28#include "usbaudio.h"
29#include "card.h"
30#include "quirks.h"
31#include "debug.h"
c731bc96 32#include "endpoint.h"
e5779998
DM		 33#include "helper.h"
34#include "pcm.h"
79f920fb 35#include "clock.h"
88a8516a 36#include "power.h"
e5779998 37
edcd3633
DM		 38#define SUBSTREAM_FLAG_DATA_EP_STARTED 0
39#define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
40
294c4fb8
PLB		 41/* return the estimated delay based on USB frame counters */
42snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
43 unsigned int rate)
44{
45 int current_frame_number;
46 int frame_diff;
47 int est_delay;
48
48779a0b
TI		 49 if (!subs->last_delay)
50 return 0; /* short path */
51
294c4fb8
PLB		 52 current_frame_number = usb_get_current_frame_number(subs->dev);
53 /*
54 * HCD implementations use different widths, use lower 8 bits.
55 * The delay will be managed up to 256ms, which is more than
56 * enough
57 */
58 frame_diff = (current_frame_number - subs->last_frame_number) & 0xff;
59
60 /* Approximation based on number of samples per USB frame (ms),
61 some truncation for 44.1 but the estimate is good enough */
62 est_delay = subs->last_delay - (frame_diff * rate / 1000);
63 if (est_delay < 0)
64 est_delay = 0;
65 return est_delay;
66}
67
e5779998
DM		 68/*
69 * return the current pcm pointer. just based on the hwptr_done value.
70 */
71static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
72{
73 struct snd_usb_substream *subs;
74 unsigned int hwptr_done;
75
76 subs = (struct snd_usb_substream *)substream->runtime->private_data;
978520b7
TI		 77 if (subs->stream->chip->shutdown)
78 return SNDRV_PCM_POS_XRUN;
e5779998
DM		 79 spin_lock(&subs->lock);
80 hwptr_done = subs->hwptr_done;
3f94fad0
TI		 81 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
82 substream->runtime->delay = snd_usb_pcm_delay(subs,
294c4fb8 83 substream->runtime->rate);
e5779998
DM		 84 spin_unlock(&subs->lock);
85 return hwptr_done / (substream->runtime->frame_bits >> 3);
86}
87
88/*
89 * find a matching audio format
90 */
61a70950 91static struct audioformat *find_format(struct snd_usb_substream *subs)
e5779998
DM		 92{
93 struct list_head *p;
94 struct audioformat *found = NULL;
95 int cur_attr = 0, attr;
96
97 list_for_each(p, &subs->fmt_list) {
98 struct audioformat *fp;
99 fp = list_entry(p, struct audioformat, list);
61a70950 100 if (!(fp->formats & (1uLL << subs->pcm_format)))
015eb0b0 101 continue;
61a70950 102 if (fp->channels != subs->channels)
e5779998 103 continue;
61a70950
DR		 104 if (subs->cur_rate < fp->rate_min ||
105 subs->cur_rate > fp->rate_max)
e5779998
DM		 106 continue;
107 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
108 unsigned int i;
109 for (i = 0; i < fp->nr_rates; i++)
61a70950 110 if (fp->rate_table[i] == subs->cur_rate)
e5779998
DM		 111 break;
112 if (i >= fp->nr_rates)
113 continue;
114 }
115 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
116 if (! found) {
117 found = fp;
118 cur_attr = attr;
119 continue;
120 }
121 /* avoid async out and adaptive in if the other method
122 * supports the same format.
123 * this is a workaround for the case like
124 * M-audio audiophile USB.
125 */
126 if (attr != cur_attr) {
127 if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
128 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
129 (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
130 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
131 continue;
132 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
133 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
134 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
135 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
136 found = fp;
137 cur_attr = attr;
138 continue;
139 }
140 }
141 /* find the format with the largest max. packet size */
142 if (fp->maxpacksize > found->maxpacksize) {
143 found = fp;
144 cur_attr = attr;
145 }
146 }
147 return found;
148}
149
767d75ad
DM		 150static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
151 struct usb_host_interface *alts,
152 struct audioformat *fmt)
153{
154 struct usb_device *dev = chip->dev;
155 unsigned int ep;
156 unsigned char data[1];
157 int err;
158
159 ep = get_endpoint(alts, 0)->bEndpointAddress;
160
767d75ad
DM		 161 data[0] = 1;
162 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
163 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
164 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
17d900c4 165 data, sizeof(data))) < 0) {
767d75ad
DM		 166 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
167 dev->devnum, iface, ep);
168 return err;
169 }
170
171 return 0;
172}
e5779998 173
92c25611
DM		 174static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
175 struct usb_host_interface *alts,
176 struct audioformat *fmt)
177{
178 struct usb_device *dev = chip->dev;
179 unsigned char data[1];
92c25611
DM		 180 int err;
181
92c25611
DM		 182 data[0] = 1;
183 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
184 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
185 UAC2_EP_CS_PITCH << 8, 0,
17d900c4 186 data, sizeof(data))) < 0) {
92c25611
DM		 187 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2)\n",
188 dev->devnum, iface, fmt->altsetting);
189 return err;
190 }
191
192 return 0;
193}
194
e5779998 195/*
92c25611 196 * initialize the pitch control and sample rate
e5779998 197 */
767d75ad 198int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
e5779998
DM		 199 struct usb_host_interface *alts,
200 struct audioformat *fmt)
201{
767d75ad
DM		 202 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
203
92c25611
DM		 204 /* if endpoint doesn't have pitch control, bail out */
205 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
206 return 0;
207
767d75ad
DM		 208 switch (altsd->bInterfaceProtocol) {
209 case UAC_VERSION_1:
a2acad82 210 default:
767d75ad
DM		 211 return init_pitch_v1(chip, iface, alts, fmt);
212
213 case UAC_VERSION_2:
92c25611 214 return init_pitch_v2(chip, iface, alts, fmt);
767d75ad 215 }
767d75ad
DM		 216}
217
a9bb3626 218static int start_endpoints(struct snd_usb_substream *subs, bool can_sleep)
edcd3633
DM		 219{
220 int err;
221
222 if (!subs->data_endpoint)
223 return -EINVAL;
224
225 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
226 struct snd_usb_endpoint *ep = subs->data_endpoint;
227
228 snd_printdd(KERN_DEBUG "Starting data EP @%p\n", ep);
229
230 ep->data_subs = subs;
015618b9 231 err = snd_usb_endpoint_start(ep, can_sleep);
edcd3633
DM		 232 if (err < 0) {
233 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
234 return err;
235 }
236 }
237
238 if (subs->sync_endpoint &&
239 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
240 struct snd_usb_endpoint *ep = subs->sync_endpoint;
241
2e4a263c
DM		 242 if (subs->data_endpoint->iface != subs->sync_endpoint->iface ||
243 subs->data_endpoint->alt_idx != subs->sync_endpoint->alt_idx) {
244 err = usb_set_interface(subs->dev,
245 subs->sync_endpoint->iface,
246 subs->sync_endpoint->alt_idx);
247 if (err < 0) {
248 snd_printk(KERN_ERR
249 "%d:%d:%d: cannot set interface (%d)\n",
250 subs->dev->devnum,
251 subs->sync_endpoint->iface,
252 subs->sync_endpoint->alt_idx, err);
253 return -EIO;
254 }
255 }
256
edcd3633
DM		 257 snd_printdd(KERN_DEBUG "Starting sync EP @%p\n", ep);
258
259 ep->sync_slave = subs->data_endpoint;
015618b9 260 err = snd_usb_endpoint_start(ep, can_sleep);
edcd3633
DM		 261 if (err < 0) {
262 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
263 return err;
264 }
265 }
266
267 return 0;
268}
269
a9bb3626 270static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
edcd3633
DM		 271{
272 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
b2eb950d 273 snd_usb_endpoint_stop(subs->sync_endpoint);
edcd3633
DM		 274
275 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
b2eb950d
TI		 276 snd_usb_endpoint_stop(subs->data_endpoint);
277
278 if (wait) {
279 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
280 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
281 }
edcd3633
DM		 282}
283
edcd3633
DM		 284static int deactivate_endpoints(struct snd_usb_substream *subs)
285{
286 int reta, retb;
287
288 reta = snd_usb_endpoint_deactivate(subs->sync_endpoint);
289 retb = snd_usb_endpoint_deactivate(subs->data_endpoint);
290
291 if (reta < 0)
292 return reta;
293
294 if (retb < 0)
295 return retb;
296
297 return 0;
298}
299
e5779998
DM		 300/*
301 * find a matching format and set up the interface
302 */
303static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
304{
305 struct usb_device *dev = subs->dev;
306 struct usb_host_interface *alts;
307 struct usb_interface_descriptor *altsd;
308 struct usb_interface *iface;
309 unsigned int ep, attr;
310 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
c75a8a7a 311 int err, implicit_fb = 0;
e5779998
DM		 312
313 iface = usb_ifnum_to_if(dev, fmt->iface);
314 if (WARN_ON(!iface))
315 return -EINVAL;
316 alts = &iface->altsetting[fmt->altset_idx];
317 altsd = get_iface_desc(alts);
318 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
319 return -EINVAL;
320
321 if (fmt == subs->cur_audiofmt)
322 return 0;
323
68e67f40
DM		 324 /* close the old interface */
325 if (subs->interface >= 0 && subs->interface != fmt->iface) {
326 err = usb_set_interface(subs->dev, subs->interface, 0);
327 if (err < 0) {
328 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed (%d)\n",
329 dev->devnum, fmt->iface, fmt->altsetting, err);
330 return -EIO;
331 }
332 subs->interface = -1;
333 subs->altset_idx = 0;
334 }
335
336 /* set interface */
337 if (subs->interface != fmt->iface ||
338 subs->altset_idx != fmt->altset_idx) {
339 err = usb_set_interface(dev, fmt->iface, fmt->altsetting);
340 if (err < 0) {
341 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed (%d)\n",
342 dev->devnum, fmt->iface, fmt->altsetting, err);
343 return -EIO;
344 }
345 snd_printdd(KERN_INFO "setting usb interface %d:%d\n",
346 fmt->iface, fmt->altsetting);
347 subs->interface = fmt->iface;
348 subs->altset_idx = fmt->altset_idx;
349 }
350
edcd3633
DM		 351 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
352 alts, fmt->endpoint, subs->direction,
353 SND_USB_ENDPOINT_TYPE_DATA);
354 if (!subs->data_endpoint)
355 return -EINVAL;
e5779998
DM		 356
357 /* we need a sync pipe in async OUT or adaptive IN mode */
358 /* check the number of EP, since some devices have broken
359 * descriptors which fool us. if it has only one EP,
360 * assume it as adaptive-out or sync-in.
361 */
362 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
c75a8a7a
DM		 363
364 switch (subs->stream->chip->usb_id) {
ca10a7eb
EZ		 365 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
366 if (is_playback) {
367 implicit_fb = 1;
368 ep = 0x81;
369 iface = usb_ifnum_to_if(dev, 3);
370
371 if (!iface || iface->num_altsetting == 0)
372 return -EINVAL;
373
374 alts = &iface->altsetting[1];
375 goto add_sync_ep;
376 }
377 break;
c75a8a7a
DM		 378 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
379 case USB_ID(0x0763, 0x2081):
380 if (is_playback) {
381 implicit_fb = 1;
edcd3633
DM		 382 ep = 0x81;
383 iface = usb_ifnum_to_if(dev, 2);
c75a8a7a
DM		 384
385 if (!iface || iface->num_altsetting == 0)
386 return -EINVAL;
387
edcd3633
DM		 388 alts = &iface->altsetting[1];
389 goto add_sync_ep;
390 }
c75a8a7a 391 }
edcd3633 392
c75a8a7a
DM		 393 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
394 (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
395 altsd->bNumEndpoints >= 2) {
e5779998
DM		 396 /* check sync-pipe endpoint */
397 /* ... and check descriptor size before accessing bSynchAddress
398 because there is a version of the SB Audigy 2 NX firmware lacking
399 the audio fields in the endpoint descriptors */
fde854bd 400 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
e5779998 401 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
c75a8a7a
DM		 402 get_endpoint(alts, 1)->bSynchAddress != 0 &&
403 !implicit_fb)) {
7fb75db1
DM		 404 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
405 dev->devnum, fmt->iface, fmt->altsetting,
406 get_endpoint(alts, 1)->bmAttributes,
407 get_endpoint(alts, 1)->bLength,
408 get_endpoint(alts, 1)->bSynchAddress);
e5779998
DM		 409 return -EINVAL;
410 }
411 ep = get_endpoint(alts, 1)->bEndpointAddress;
7fb75db1
DM		 412 if (!implicit_fb &&
413 get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
e5779998 414 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
7fb75db1
DM		 415 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
416 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
417 dev->devnum, fmt->iface, fmt->altsetting,
418 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
e5779998
DM		 419 return -EINVAL;
420 }
c75a8a7a
DM		 421
422 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
423 == USB_ENDPOINT_USAGE_IMPLICIT_FB;
424
edcd3633
DM		 425add_sync_ep:
426 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
427 alts, ep, !subs->direction,
c75a8a7a
DM		 428 implicit_fb ?
429 SND_USB_ENDPOINT_TYPE_DATA :
430 SND_USB_ENDPOINT_TYPE_SYNC);
edcd3633
DM		 431 if (!subs->sync_endpoint)
432 return -EINVAL;
433
434 subs->data_endpoint->sync_master = subs->sync_endpoint;
435 }
e5779998 436
9e9b5946 437 if ((err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt)) < 0)
e5779998
DM		 438 return err;
439
440 subs->cur_audiofmt = fmt;
441
442 snd_usb_set_format_quirk(subs, fmt);
443
444#if 0
445 printk(KERN_DEBUG
446 "setting done: format = %d, rate = %d..%d, channels = %d\n",
447 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
448 printk(KERN_DEBUG
449 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
450 subs->datapipe, subs->syncpipe);
451#endif
452
453 return 0;
454}
455
61a70950
DR		 456/*
457 * configure endpoint params
458 *
459 * called during initial setup and upon resume
460 */
461static int configure_endpoint(struct snd_usb_substream *subs)
462{
463 int ret;
464
61a70950 465 /* format changed */
b0db6063 466 stop_endpoints(subs, true);
61a70950
DR		 467 ret = snd_usb_endpoint_set_params(subs->data_endpoint,
468 subs->pcm_format,
469 subs->channels,
470 subs->period_bytes,
471 subs->cur_rate,
472 subs->cur_audiofmt,
473 subs->sync_endpoint);
474 if (ret < 0)
978520b7 475 return ret;
61a70950
DR		 476
477 if (subs->sync_endpoint)
947d2996 478 ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
61a70950
DR		 479 subs->pcm_format,
480 subs->channels,
481 subs->period_bytes,
482 subs->cur_rate,
483 subs->cur_audiofmt,
484 NULL);
61a70950
DR		 485 return ret;
486}
487
e5779998
DM		 488/*
489 * hw_params callback
490 *
491 * allocate a buffer and set the given audio format.
492 *
493 * so far we use a physically linear buffer although packetize transfer
494 * doesn't need a continuous area.
495 * if sg buffer is supported on the later version of alsa, we'll follow
496 * that.
497 */
498static int snd_usb_hw_params(struct snd_pcm_substream *substream,
499 struct snd_pcm_hw_params *hw_params)
500{
501 struct snd_usb_substream *subs = substream->runtime->private_data;
502 struct audioformat *fmt;
61a70950 503 int ret;
e5779998
DM		 504
505 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
506 params_buffer_bytes(hw_params));
507 if (ret < 0)
508 return ret;
509
61a70950
DR		 510 subs->pcm_format = params_format(hw_params);
511 subs->period_bytes = params_period_bytes(hw_params);
512 subs->channels = params_channels(hw_params);
513 subs->cur_rate = params_rate(hw_params);
514
515 fmt = find_format(subs);
e5779998
DM		 516 if (!fmt) {
517 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
61a70950 518 subs->pcm_format, subs->cur_rate, subs->channels);
e5779998
DM		 519 return -EINVAL;
520 }
521
34f3c89f 522 down_read(&subs->stream->chip->shutdown_rwsem);
978520b7
TI		 523 if (subs->stream->chip->shutdown)
524 ret = -ENODEV;
525 else
526 ret = set_format(subs, fmt);
34f3c89f 527 up_read(&subs->stream->chip->shutdown_rwsem);
978520b7 528 if (ret < 0)
e5779998
DM		 529 return ret;
530
61a70950
DR		 531 subs->interface = fmt->iface;
532 subs->altset_idx = fmt->altset_idx;
384dc085 533 subs->need_setup_ep = true;
715a1705 534
61a70950 535 return 0;
e5779998
DM		 536}
537
538/*
539 * hw_free callback
540 *
541 * reset the audio format and release the buffer
542 */
543static int snd_usb_hw_free(struct snd_pcm_substream *substream)
544{
545 struct snd_usb_substream *subs = substream->runtime->private_data;
546
547 subs->cur_audiofmt = NULL;
548 subs->cur_rate = 0;
549 subs->period_bytes = 0;
34f3c89f 550 down_read(&subs->stream->chip->shutdown_rwsem);
978520b7 551 if (!subs->stream->chip->shutdown) {
a9bb3626 552 stop_endpoints(subs, true);
978520b7
TI		 553 deactivate_endpoints(subs);
554 }
34f3c89f 555 up_read(&subs->stream->chip->shutdown_rwsem);
e5779998
DM		 556 return snd_pcm_lib_free_vmalloc_buffer(substream);
557}
558
559/*
560 * prepare callback
561 *
562 * only a few subtle things...
563 */
564static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
565{
566 struct snd_pcm_runtime *runtime = substream->runtime;
567 struct snd_usb_substream *subs = runtime->private_data;
61a70950
DR		 568 struct usb_host_interface *alts;
569 struct usb_interface *iface;
570 int ret;
e5779998
DM		 571
572 if (! subs->cur_audiofmt) {
573 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
574 return -ENXIO;
575 }
576
34f3c89f 577 down_read(&subs->stream->chip->shutdown_rwsem);
978520b7
TI		 578 if (subs->stream->chip->shutdown) {
579 ret = -ENODEV;
580 goto unlock;
581 }
582 if (snd_BUG_ON(!subs->data_endpoint)) {
583 ret = -EIO;
584 goto unlock;
585 }
edcd3633 586
f58161ba
TI		 587 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
588 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
589
61a70950
DR		 590 ret = set_format(subs, subs->cur_audiofmt);
591 if (ret < 0)
978520b7 592 goto unlock;
61a70950
DR		 593
594 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface);
595 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx];
596 ret = snd_usb_init_sample_rate(subs->stream->chip,
597 subs->cur_audiofmt->iface,
598 alts,
599 subs->cur_audiofmt,
600 subs->cur_rate);
601 if (ret < 0)
978520b7 602 goto unlock;
61a70950 603
384dc085
TI		 604 if (subs->need_setup_ep) {
605 ret = configure_endpoint(subs);
606 if (ret < 0)
978520b7 607 goto unlock;
384dc085
TI		 608 subs->need_setup_ep = false;
609 }
61a70950 610
e5779998 611 /* some unit conversions in runtime */
edcd3633
DM		 612 subs->data_endpoint->maxframesize =
613 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
614 subs->data_endpoint->curframesize =
615 bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
e5779998
DM		 616
617 /* reset the pointer */
618 subs->hwptr_done = 0;
619 subs->transfer_done = 0;
294c4fb8
PLB		 620 subs->last_delay = 0;
621 subs->last_frame_number = 0;
e5779998
DM		 622 runtime->delay = 0;
623
edcd3633
DM		 624 /* for playback, submit the URBs now; otherwise, the first hwptr_done
625 * updates for all URBs would happen at the same time when starting */
626 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
a9bb3626 627 ret = start_endpoints(subs, true);
edcd3633 628
978520b7 629 unlock:
34f3c89f 630 up_read(&subs->stream->chip->shutdown_rwsem);
978520b7 631 return ret;
e5779998
DM		 632}
633
634static struct snd_pcm_hardware snd_usb_hardware =
635{
636 .info = SNDRV_PCM_INFO_MMAP |
637 SNDRV_PCM_INFO_MMAP_VALID |
638 SNDRV_PCM_INFO_BATCH |
639 SNDRV_PCM_INFO_INTERLEAVED |
640 SNDRV_PCM_INFO_BLOCK_TRANSFER |
641 SNDRV_PCM_INFO_PAUSE,
642 .buffer_bytes_max = 1024 * 1024,
643 .period_bytes_min = 64,
644 .period_bytes_max = 512 * 1024,
645 .periods_min = 2,
646 .periods_max = 1024,
647};
648
649static int hw_check_valid_format(struct snd_usb_substream *subs,
650 struct snd_pcm_hw_params *params,
651 struct audioformat *fp)
652{
653 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
654 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
655 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
656 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
015eb0b0 657 struct snd_mask check_fmts;
e5779998
DM		 658 unsigned int ptime;
659
660 /* check the format */
015eb0b0
CL		 661 snd_mask_none(&check_fmts);
662 check_fmts.bits[0] = (u32)fp->formats;
663 check_fmts.bits[1] = (u32)(fp->formats >> 32);
664 snd_mask_intersect(&check_fmts, fmts);
665 if (snd_mask_empty(&check_fmts)) {
e5779998
DM		 666 hwc_debug(" > check: no supported format %d\n", fp->format);
667 return 0;
668 }
669 /* check the channels */
670 if (fp->channels < ct->min || fp->channels > ct->max) {
671 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
672 return 0;
673 }
674 /* check the rate is within the range */
675 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
676 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
677 return 0;
678 }
679 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
680 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
681 return 0;
682 }
683 /* check whether the period time is >= the data packet interval */
978520b7 684 if (subs->speed != USB_SPEED_FULL) {
e5779998
DM		 685 ptime = 125 * (1 << fp->datainterval);
686 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
687 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
688 return 0;
689 }
690 }
691 return 1;
692}
693
694static int hw_rule_rate(struct snd_pcm_hw_params *params,
695 struct snd_pcm_hw_rule *rule)
696{
697 struct snd_usb_substream *subs = rule->private;
698 struct list_head *p;
699 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
700 unsigned int rmin, rmax;
701 int changed;
702
703 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
704 changed = 0;
705 rmin = rmax = 0;
706 list_for_each(p, &subs->fmt_list) {
707 struct audioformat *fp;
708 fp = list_entry(p, struct audioformat, list);
709 if (!hw_check_valid_format(subs, params, fp))
710 continue;
711 if (changed++) {
712 if (rmin > fp->rate_min)
713 rmin = fp->rate_min;
714 if (rmax < fp->rate_max)
715 rmax = fp->rate_max;
716 } else {
717 rmin = fp->rate_min;
718 rmax = fp->rate_max;
719 }
720 }
721
722 if (!changed) {
723 hwc_debug(" --> get empty\n");
724 it->empty = 1;
725 return -EINVAL;
726 }
727
728 changed = 0;
729 if (it->min < rmin) {
730 it->min = rmin;
731 it->openmin = 0;
732 changed = 1;
733 }
734 if (it->max > rmax) {
735 it->max = rmax;
736 it->openmax = 0;
737 changed = 1;
738 }
739 if (snd_interval_checkempty(it)) {
740 it->empty = 1;
741 return -EINVAL;
742 }
743 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
744 return changed;
745}
746
747
748static int hw_rule_channels(struct snd_pcm_hw_params *params,
749 struct snd_pcm_hw_rule *rule)
750{
751 struct snd_usb_substream *subs = rule->private;
752 struct list_head *p;
753 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
754 unsigned int rmin, rmax;
755 int changed;
756
757 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
758 changed = 0;
759 rmin = rmax = 0;
760 list_for_each(p, &subs->fmt_list) {
761 struct audioformat *fp;
762 fp = list_entry(p, struct audioformat, list);
763 if (!hw_check_valid_format(subs, params, fp))
764 continue;
765 if (changed++) {
766 if (rmin > fp->channels)
767 rmin = fp->channels;
768 if (rmax < fp->channels)
769 rmax = fp->channels;
770 } else {
771 rmin = fp->channels;
772 rmax = fp->channels;
773 }
774 }
775
776 if (!changed) {
777 hwc_debug(" --> get empty\n");
778 it->empty = 1;
779 return -EINVAL;
780 }
781
782 changed = 0;
783 if (it->min < rmin) {
784 it->min = rmin;
785 it->openmin = 0;
786 changed = 1;
787 }
788 if (it->max > rmax) {
789 it->max = rmax;
790 it->openmax = 0;
791 changed = 1;
792 }
793 if (snd_interval_checkempty(it)) {
794 it->empty = 1;
795 return -EINVAL;
796 }
797 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
798 return changed;
799}
800
801static int hw_rule_format(struct snd_pcm_hw_params *params,
802 struct snd_pcm_hw_rule *rule)
803{
804 struct snd_usb_substream *subs = rule->private;
805 struct list_head *p;
806 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
807 u64 fbits;
808 u32 oldbits[2];
809 int changed;
810
811 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
812 fbits = 0;
813 list_for_each(p, &subs->fmt_list) {
814 struct audioformat *fp;
815 fp = list_entry(p, struct audioformat, list);
816 if (!hw_check_valid_format(subs, params, fp))
817 continue;
015eb0b0 818 fbits |= fp->formats;
e5779998
DM		 819 }
820
821 oldbits[0] = fmt->bits[0];
822 oldbits[1] = fmt->bits[1];
823 fmt->bits[0] &= (u32)fbits;
824 fmt->bits[1] &= (u32)(fbits >> 32);
825 if (!fmt->bits[0] && !fmt->bits[1]) {
826 hwc_debug(" --> get empty\n");
827 return -EINVAL;
828 }
829 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
830 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
831 return changed;
832}
833
834static int hw_rule_period_time(struct snd_pcm_hw_params *params,
835 struct snd_pcm_hw_rule *rule)
836{
837 struct snd_usb_substream *subs = rule->private;
838 struct audioformat *fp;
839 struct snd_interval *it;
840 unsigned char min_datainterval;
841 unsigned int pmin;
842 int changed;
843
844 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
845 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
846 min_datainterval = 0xff;
847 list_for_each_entry(fp, &subs->fmt_list, list) {
848 if (!hw_check_valid_format(subs, params, fp))
849 continue;
850 min_datainterval = min(min_datainterval, fp->datainterval);
851 }
852 if (min_datainterval == 0xff) {
a7ce2e0d 853 hwc_debug(" --> get empty\n");
e5779998
DM		 854 it->empty = 1;
855 return -EINVAL;
856 }
857 pmin = 125 * (1 << min_datainterval);
858 changed = 0;
859 if (it->min < pmin) {
860 it->min = pmin;
861 it->openmin = 0;
862 changed = 1;
863 }
864 if (snd_interval_checkempty(it)) {
865 it->empty = 1;
866 return -EINVAL;
867 }
868 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
869 return changed;
870}
871
872/*
873 * If the device supports unusual bit rates, does the request meet these?
874 */
875static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
876 struct snd_usb_substream *subs)
877{
878 struct audioformat *fp;
0717d0f5 879 int *rate_list;
e5779998
DM		 880 int count = 0, needs_knot = 0;
881 int err;
882
5cd5d7c4
CL		 883 kfree(subs->rate_list.list);
884 subs->rate_list.list = NULL;
885
e5779998
DM		 886 list_for_each_entry(fp, &subs->fmt_list, list) {
887 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
888 return 0;
889 count += fp->nr_rates;
890 if (fp->rates & SNDRV_PCM_RATE_KNOT)
891 needs_knot = 1;
892 }
893 if (!needs_knot)
894 return 0;
895
0717d0f5
TI		 896 subs->rate_list.list = rate_list =
897 kmalloc(sizeof(int) * count, GFP_KERNEL);
8a8d56b2
JJ		 898 if (!subs->rate_list.list)
899 return -ENOMEM;
900 subs->rate_list.count = count;
e5779998
DM		 901 subs->rate_list.mask = 0;
902 count = 0;
903 list_for_each_entry(fp, &subs->fmt_list, list) {
904 int i;
905 for (i = 0; i < fp->nr_rates; i++)
0717d0f5 906 rate_list[count++] = fp->rate_table[i];
e5779998
DM		 907 }
908 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
909 &subs->rate_list);
910 if (err < 0)
911 return err;
912
913 return 0;
914}
915
916
917/*
918 * set up the runtime hardware information.
919 */
920
921static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
922{
923 struct list_head *p;
924 unsigned int pt, ptmin;
925 int param_period_time_if_needed;
926 int err;
927
928 runtime->hw.formats = subs->formats;
929
930 runtime->hw.rate_min = 0x7fffffff;
931 runtime->hw.rate_max = 0;
932 runtime->hw.channels_min = 256;
933 runtime->hw.channels_max = 0;
934 runtime->hw.rates = 0;
935 ptmin = UINT_MAX;
936 /* check min/max rates and channels */
937 list_for_each(p, &subs->fmt_list) {
938 struct audioformat *fp;
939 fp = list_entry(p, struct audioformat, list);
940 runtime->hw.rates |= fp->rates;
941 if (runtime->hw.rate_min > fp->rate_min)
942 runtime->hw.rate_min = fp->rate_min;
943 if (runtime->hw.rate_max < fp->rate_max)
944 runtime->hw.rate_max = fp->rate_max;
945 if (runtime->hw.channels_min > fp->channels)
946 runtime->hw.channels_min = fp->channels;
947 if (runtime->hw.channels_max < fp->channels)
948 runtime->hw.channels_max = fp->channels;
949 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
950 /* FIXME: there might be more than one audio formats... */
951 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
952 fp->frame_size;
953 }
954 pt = 125 * (1 << fp->datainterval);
955 ptmin = min(ptmin, pt);
956 }
88a8516a
ON		 957 err = snd_usb_autoresume(subs->stream->chip);
958 if (err < 0)
959 return err;
e5779998
DM		 960
961 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
978520b7 962 if (subs->speed == USB_SPEED_FULL)
e5779998
DM		 963 /* full speed devices have fixed data packet interval */
964 ptmin = 1000;
965 if (ptmin == 1000)
966 /* if period time doesn't go below 1 ms, no rules needed */
967 param_period_time_if_needed = -1;
968 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
969 ptmin, UINT_MAX);
970
971 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
972 hw_rule_rate, subs,
973 SNDRV_PCM_HW_PARAM_FORMAT,
974 SNDRV_PCM_HW_PARAM_CHANNELS,
975 param_period_time_if_needed,
976 -1)) < 0)
88a8516a 977 goto rep_err;
e5779998
DM		 978 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
979 hw_rule_channels, subs,
980 SNDRV_PCM_HW_PARAM_FORMAT,
981 SNDRV_PCM_HW_PARAM_RATE,
982 param_period_time_if_needed,
983 -1)) < 0)
88a8516a 984 goto rep_err;
e5779998
DM		 985 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
986 hw_rule_format, subs,
987 SNDRV_PCM_HW_PARAM_RATE,
988 SNDRV_PCM_HW_PARAM_CHANNELS,
989 param_period_time_if_needed,
990 -1)) < 0)
88a8516a 991 goto rep_err;
e5779998
DM		 992 if (param_period_time_if_needed >= 0) {
993 err = snd_pcm_hw_rule_add(runtime, 0,
994 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
995 hw_rule_period_time, subs,
996 SNDRV_PCM_HW_PARAM_FORMAT,
997 SNDRV_PCM_HW_PARAM_CHANNELS,
998 SNDRV_PCM_HW_PARAM_RATE,
999 -1);
1000 if (err < 0)
88a8516a 1001 goto rep_err;
e5779998
DM		 1002 }
1003 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
88a8516a 1004 goto rep_err;
e5779998 1005 return 0;
88a8516a
ON		 1006
1007rep_err:
1008 snd_usb_autosuspend(subs->stream->chip);
1009 return err;
e5779998
DM		 1010}
1011
1012static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1013{
1014 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1015 struct snd_pcm_runtime *runtime = substream->runtime;
1016 struct snd_usb_substream *subs = &as->substream[direction];
1017
1018 subs->interface = -1;
e11b4e0e 1019 subs->altset_idx = 0;
e5779998
DM		 1020 runtime->hw = snd_usb_hardware;
1021 runtime->private_data = subs;
1022 subs->pcm_substream = substream;
88a8516a 1023 /* runtime PM is also done there */
e5779998
DM		 1024 return setup_hw_info(runtime, subs);
1025}
1026
1027static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1028{
1029 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1030 struct snd_usb_substream *subs = &as->substream[direction];
1031
b0db6063 1032 stop_endpoints(subs, true);
68e67f40
DM		 1033
1034 if (!as->chip->shutdown && subs->interface >= 0) {
1035 usb_set_interface(subs->dev, subs->interface, 0);
1036 subs->interface = -1;
1037 }
1038
e5779998 1039 subs->pcm_substream = NULL;
88a8516a 1040 snd_usb_autosuspend(subs->stream->chip);
edcd3633 1041
68e67f40 1042 return 0;
edcd3633
DM		 1043}
1044
1045/* Since a URB can handle only a single linear buffer, we must use double
1046 * buffering when the data to be transferred overflows the buffer boundary.
1047 * To avoid inconsistencies when updating hwptr_done, we use double buffering
1048 * for all URBs.
1049 */
1050static void retire_capture_urb(struct snd_usb_substream *subs,
1051 struct urb *urb)
1052{
1053 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1054 unsigned int stride, frames, bytes, oldptr;
1055 int i, period_elapsed = 0;
1056 unsigned long flags;
1057 unsigned char *cp;
1058
1059 stride = runtime->frame_bits >> 3;
1060
1061 for (i = 0; i < urb->number_of_packets; i++) {
1062 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1063 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
1064 snd_printdd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
1065 // continue;
1066 }
1067 bytes = urb->iso_frame_desc[i].actual_length;
1068 frames = bytes / stride;
1069 if (!subs->txfr_quirk)
1070 bytes = frames * stride;
1071 if (bytes % (runtime->sample_bits >> 3) != 0) {
1072#ifdef CONFIG_SND_DEBUG_VERBOSE
1073 int oldbytes = bytes;
1074#endif
1075 bytes = frames * stride;
1076 snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n",
1077 oldbytes, bytes);
1078 }
1079 /* update the current pointer */
1080 spin_lock_irqsave(&subs->lock, flags);
1081 oldptr = subs->hwptr_done;
1082 subs->hwptr_done += bytes;
1083 if (subs->hwptr_done >= runtime->buffer_size * stride)
1084 subs->hwptr_done -= runtime->buffer_size * stride;
1085 frames = (bytes + (oldptr % stride)) / stride;
1086 subs->transfer_done += frames;
1087 if (subs->transfer_done >= runtime->period_size) {
1088 subs->transfer_done -= runtime->period_size;
1089 period_elapsed = 1;
1090 }
1091 spin_unlock_irqrestore(&subs->lock, flags);
1092 /* copy a data chunk */
1093 if (oldptr + bytes > runtime->buffer_size * stride) {
1094 unsigned int bytes1 =
1095 runtime->buffer_size * stride - oldptr;
1096 memcpy(runtime->dma_area + oldptr, cp, bytes1);
1097 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1098 } else {
1099 memcpy(runtime->dma_area + oldptr, cp, bytes);
1100 }
1101 }
1102
1103 if (period_elapsed)
1104 snd_pcm_period_elapsed(subs->pcm_substream);
1105}
1106
1107static void prepare_playback_urb(struct snd_usb_substream *subs,
1108 struct urb *urb)
1109{
1110 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
245baf98 1111 struct snd_usb_endpoint *ep = subs->data_endpoint;
edcd3633
DM		 1112 struct snd_urb_ctx *ctx = urb->context;
1113 unsigned int counts, frames, bytes;
1114 int i, stride, period_elapsed = 0;
1115 unsigned long flags;
1116
1117 stride = runtime->frame_bits >> 3;
1118
1119 frames = 0;
1120 urb->number_of_packets = 0;
1121 spin_lock_irqsave(&subs->lock, flags);
1122 for (i = 0; i < ctx->packets; i++) {
245baf98
DM		 1123 if (ctx->packet_size[i])
1124 counts = ctx->packet_size[i];
1125 else
1126 counts = snd_usb_endpoint_next_packet_size(ep);
1127
edcd3633
DM		 1128 /* set up descriptor */
1129 urb->iso_frame_desc[i].offset = frames * stride;
1130 urb->iso_frame_desc[i].length = counts * stride;
1131 frames += counts;
1132 urb->number_of_packets++;
1133 subs->transfer_done += counts;
1134 if (subs->transfer_done >= runtime->period_size) {
1135 subs->transfer_done -= runtime->period_size;
1136 period_elapsed = 1;
1137 if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1138 if (subs->transfer_done > 0) {
1139 /* FIXME: fill-max mode is not
1140 * supported yet */
1141 frames -= subs->transfer_done;
1142 counts -= subs->transfer_done;
1143 urb->iso_frame_desc[i].length =
1144 counts * stride;
1145 subs->transfer_done = 0;
1146 }
1147 i++;
1148 if (i < ctx->packets) {
1149 /* add a transfer delimiter */
1150 urb->iso_frame_desc[i].offset =
1151 frames * stride;
1152 urb->iso_frame_desc[i].length = 0;
1153 urb->number_of_packets++;
1154 }
1155 break;
1156 }
1157 }
1158 if (period_elapsed &&
1159 !snd_usb_endpoint_implict_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */
1160 break;
1161 }
1162 bytes = frames * stride;
1163 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
1164 /* err, the transferred area goes over buffer boundary. */
1165 unsigned int bytes1 =
1166 runtime->buffer_size * stride - subs->hwptr_done;
1167 memcpy(urb->transfer_buffer,
1168 runtime->dma_area + subs->hwptr_done, bytes1);
1169 memcpy(urb->transfer_buffer + bytes1,
1170 runtime->dma_area, bytes - bytes1);
1171 } else {
1172 memcpy(urb->transfer_buffer,
1173 runtime->dma_area + subs->hwptr_done, bytes);
1174 }
1175 subs->hwptr_done += bytes;
1176 if (subs->hwptr_done >= runtime->buffer_size * stride)
1177 subs->hwptr_done -= runtime->buffer_size * stride;
fbcfbf5f
DM		 1178
1179 /* update delay with exact number of samples queued */
1180 runtime->delay = subs->last_delay;
edcd3633 1181 runtime->delay += frames;
fbcfbf5f
DM		 1182 subs->last_delay = runtime->delay;
1183
1184 /* realign last_frame_number */
1185 subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1186 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1187
edcd3633
DM		 1188 spin_unlock_irqrestore(&subs->lock, flags);
1189 urb->transfer_buffer_length = bytes;
1190 if (period_elapsed)
1191 snd_pcm_period_elapsed(subs->pcm_substream);
1192}
1193
1194/*
1195 * process after playback data complete
1196 * - decrease the delay count again
1197 */
1198static void retire_playback_urb(struct snd_usb_substream *subs,
1199 struct urb *urb)
1200{
1201 unsigned long flags;
1202 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1203 int stride = runtime->frame_bits >> 3;
1204 int processed = urb->transfer_buffer_length / stride;
fbcfbf5f 1205 int est_delay;
edcd3633 1206
1213a205
TI		 1207 /* ignore the delay accounting when procssed=0 is given, i.e.
1208 * silent payloads are procssed before handling the actual data
1209 */
1210 if (!processed)
1211 return;
1212
edcd3633 1213 spin_lock_irqsave(&subs->lock, flags);
48779a0b
TI		 1214 if (!subs->last_delay)
1215 goto out; /* short path */
1216
fbcfbf5f
DM		 1217 est_delay = snd_usb_pcm_delay(subs, runtime->rate);
1218 /* update delay with exact number of samples played */
1219 if (processed > subs->last_delay)
1220 subs->last_delay = 0;
edcd3633 1221 else
fbcfbf5f
DM		 1222 subs->last_delay -= processed;
1223 runtime->delay = subs->last_delay;
1224
1225 /*
1226 * Report when delay estimate is off by more than 2ms.
1227 * The error should be lower than 2ms since the estimate relies
1228 * on two reads of a counter updated every ms.
1229 */
1230 if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
1231 snd_printk(KERN_DEBUG "delay: estimated %d, actual %d\n",
1232 est_delay, subs->last_delay);
1233
48779a0b
TI		 1234 if (!subs->running) {
1235 /* update last_frame_number for delay counting here since
1236 * prepare_playback_urb won't be called during pause
1237 */
1238 subs->last_frame_number =
1239 usb_get_current_frame_number(subs->dev) & 0xff;
1240 }
1241
1242 out:
edcd3633 1243 spin_unlock_irqrestore(&subs->lock, flags);
e5779998
DM		 1244}
1245
1246static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1247{
1248 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1249}
1250
1251static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1252{
1253 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1254}
1255
1256static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1257{
1258 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1259}
1260
1261static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1262{
1263 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1264}
1265
edcd3633
DM		 1266static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1267 int cmd)
1268{
1269 struct snd_usb_substream *subs = substream->runtime->private_data;
1270
1271 switch (cmd) {
1272 case SNDRV_PCM_TRIGGER_START:
1273 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1274 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
1275 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1276 subs->running = 1;
edcd3633
DM		 1277 return 0;
1278 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1279 stop_endpoints(subs, false);
97f8d3b6 1280 subs->running = 0;
edcd3633
DM		 1281 return 0;
1282 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1283 subs->data_endpoint->prepare_data_urb = NULL;
48779a0b
TI		 1284 /* keep retire_data_urb for delay calculation */
1285 subs->data_endpoint->retire_data_urb = retire_playback_urb;
97f8d3b6 1286 subs->running = 0;
edcd3633
DM		 1287 return 0;
1288 }
1289
1290 return -EINVAL;
1291}
1292
afe25967
DM		 1293static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream,
1294 int cmd)
edcd3633
DM		 1295{
1296 int err;
1297 struct snd_usb_substream *subs = substream->runtime->private_data;
1298
1299 switch (cmd) {
1300 case SNDRV_PCM_TRIGGER_START:
a9bb3626 1301 err = start_endpoints(subs, false);
edcd3633
DM		 1302 if (err < 0)
1303 return err;
1304
1305 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1306 subs->running = 1;
edcd3633
DM		 1307 return 0;
1308 case SNDRV_PCM_TRIGGER_STOP:
a9bb3626 1309 stop_endpoints(subs, false);
97f8d3b6 1310 subs->running = 0;
edcd3633
DM		 1311 return 0;
1312 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1313 subs->data_endpoint->retire_data_urb = NULL;
97f8d3b6 1314 subs->running = 0;
edcd3633
DM		 1315 return 0;
1316 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1317 subs->data_endpoint->retire_data_urb = retire_capture_urb;
97f8d3b6 1318 subs->running = 1;
edcd3633
DM		 1319 return 0;
1320 }
1321
1322 return -EINVAL;
1323}
1324
e5779998
DM		 1325static struct snd_pcm_ops snd_usb_playback_ops = {
1326 .open = snd_usb_playback_open,
1327 .close = snd_usb_playback_close,
1328 .ioctl = snd_pcm_lib_ioctl,
1329 .hw_params = snd_usb_hw_params,
1330 .hw_free = snd_usb_hw_free,
1331 .prepare = snd_usb_pcm_prepare,
1332 .trigger = snd_usb_substream_playback_trigger,
1333 .pointer = snd_usb_pcm_pointer,
1334 .page = snd_pcm_lib_get_vmalloc_page,
1335 .mmap = snd_pcm_lib_mmap_vmalloc,
1336};
1337
1338static struct snd_pcm_ops snd_usb_capture_ops = {
1339 .open = snd_usb_capture_open,
1340 .close = snd_usb_capture_close,
1341 .ioctl = snd_pcm_lib_ioctl,
1342 .hw_params = snd_usb_hw_params,
1343 .hw_free = snd_usb_hw_free,
1344 .prepare = snd_usb_pcm_prepare,
1345 .trigger = snd_usb_substream_capture_trigger,
1346 .pointer = snd_usb_pcm_pointer,
1347 .page = snd_pcm_lib_get_vmalloc_page,
1348 .mmap = snd_pcm_lib_mmap_vmalloc,
1349};
1350
1351void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1352{
1353 snd_pcm_set_ops(pcm, stream,
1354 stream == SNDRV_PCM_STREAM_PLAYBACK ?
1355 &snd_usb_playback_ops : &snd_usb_capture_ops);
1356}
Linux kernel - Deliverables
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