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.
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.
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
17 #include <linux/init.h>
18 #include <linux/slab.h>
19 #include <linux/bitrev.h>
20 #include <linux/ratelimit.h>
21 #include <linux/usb.h>
22 #include <linux/usb/audio.h>
23 #include <linux/usb/audio-v2.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/pcm_params.h>
39 #define SUBSTREAM_FLAG_DATA_EP_STARTED 0
40 #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
42 /* return the estimated delay based on USB frame counters */
43 snd_pcm_uframes_t
snd_usb_pcm_delay(struct snd_usb_substream
*subs
,
46 int current_frame_number
;
50 if (!subs
->last_delay
)
51 return 0; /* short path */
53 current_frame_number
= usb_get_current_frame_number(subs
->dev
);
55 * HCD implementations use different widths, use lower 8 bits.
56 * The delay will be managed up to 256ms, which is more than
59 frame_diff
= (current_frame_number
- subs
->last_frame_number
) & 0xff;
61 /* Approximation based on number of samples per USB frame (ms),
62 some truncation for 44.1 but the estimate is good enough */
63 est_delay
= frame_diff
* rate
/ 1000;
64 if (subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
)
65 est_delay
= subs
->last_delay
- est_delay
;
67 est_delay
= subs
->last_delay
+ est_delay
;
75 * return the current pcm pointer. just based on the hwptr_done value.
77 static snd_pcm_uframes_t
snd_usb_pcm_pointer(struct snd_pcm_substream
*substream
)
79 struct snd_usb_substream
*subs
;
80 unsigned int hwptr_done
;
82 subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
83 if (subs
->stream
->chip
->shutdown
)
84 return SNDRV_PCM_POS_XRUN
;
85 spin_lock(&subs
->lock
);
86 hwptr_done
= subs
->hwptr_done
;
87 substream
->runtime
->delay
= snd_usb_pcm_delay(subs
,
88 substream
->runtime
->rate
);
89 spin_unlock(&subs
->lock
);
90 return hwptr_done
/ (substream
->runtime
->frame_bits
>> 3);
94 * find a matching audio format
96 static struct audioformat
*find_format(struct snd_usb_substream
*subs
)
98 struct audioformat
*fp
;
99 struct audioformat
*found
= NULL
;
100 int cur_attr
= 0, attr
;
102 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
103 if (!(fp
->formats
& pcm_format_to_bits(subs
->pcm_format
)))
105 if (fp
->channels
!= subs
->channels
)
107 if (subs
->cur_rate
< fp
->rate_min
||
108 subs
->cur_rate
> fp
->rate_max
)
110 if (! (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)) {
112 for (i
= 0; i
< fp
->nr_rates
; i
++)
113 if (fp
->rate_table
[i
] == subs
->cur_rate
)
115 if (i
>= fp
->nr_rates
)
118 attr
= fp
->ep_attr
& USB_ENDPOINT_SYNCTYPE
;
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.
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
))
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
)) {
144 /* find the format with the largest max. packet size */
145 if (fp
->maxpacksize
> found
->maxpacksize
) {
153 static int init_pitch_v1(struct snd_usb_audio
*chip
, int iface
,
154 struct usb_host_interface
*alts
,
155 struct audioformat
*fmt
)
157 struct usb_device
*dev
= chip
->dev
;
159 unsigned char data
[1];
162 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
165 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), UAC_SET_CUR
,
166 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
167 UAC_EP_CS_ATTR_PITCH_CONTROL
<< 8, ep
,
168 data
, sizeof(data
))) < 0) {
169 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH\n",
170 dev
->devnum
, iface
, ep
);
177 static int init_pitch_v2(struct snd_usb_audio
*chip
, int iface
,
178 struct usb_host_interface
*alts
,
179 struct audioformat
*fmt
)
181 struct usb_device
*dev
= chip
->dev
;
182 unsigned char data
[1];
186 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), UAC2_CS_CUR
,
187 USB_TYPE_CLASS
| USB_RECIP_ENDPOINT
| USB_DIR_OUT
,
188 UAC2_EP_CS_PITCH
<< 8, 0,
189 data
, sizeof(data
))) < 0) {
190 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH (v2)\n",
191 dev
->devnum
, iface
, fmt
->altsetting
);
199 * initialize the pitch control and sample rate
201 int snd_usb_init_pitch(struct snd_usb_audio
*chip
, int iface
,
202 struct usb_host_interface
*alts
,
203 struct audioformat
*fmt
)
205 struct usb_interface_descriptor
*altsd
= get_iface_desc(alts
);
207 /* if endpoint doesn't have pitch control, bail out */
208 if (!(fmt
->attributes
& UAC_EP_CS_ATTR_PITCH_CONTROL
))
211 switch (altsd
->bInterfaceProtocol
) {
214 return init_pitch_v1(chip
, iface
, alts
, fmt
);
217 return init_pitch_v2(chip
, iface
, alts
, fmt
);
221 static int start_endpoints(struct snd_usb_substream
*subs
, bool can_sleep
)
225 if (!subs
->data_endpoint
)
228 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED
, &subs
->flags
)) {
229 struct snd_usb_endpoint
*ep
= subs
->data_endpoint
;
231 snd_printdd(KERN_DEBUG
"Starting data EP @%p\n", ep
);
233 ep
->data_subs
= subs
;
234 err
= snd_usb_endpoint_start(ep
, can_sleep
);
236 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED
, &subs
->flags
);
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
;
245 if (subs
->data_endpoint
->iface
!= subs
->sync_endpoint
->iface
||
246 subs
->data_endpoint
->alt_idx
!= subs
->sync_endpoint
->alt_idx
) {
247 err
= usb_set_interface(subs
->dev
,
248 subs
->sync_endpoint
->iface
,
249 subs
->sync_endpoint
->alt_idx
);
252 "%d:%d:%d: cannot set interface (%d)\n",
254 subs
->sync_endpoint
->iface
,
255 subs
->sync_endpoint
->alt_idx
, err
);
260 snd_printdd(KERN_DEBUG
"Starting sync EP @%p\n", ep
);
262 ep
->sync_slave
= subs
->data_endpoint
;
263 err
= snd_usb_endpoint_start(ep
, can_sleep
);
265 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED
, &subs
->flags
);
273 static void stop_endpoints(struct snd_usb_substream
*subs
, bool wait
)
275 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED
, &subs
->flags
))
276 snd_usb_endpoint_stop(subs
->sync_endpoint
);
278 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED
, &subs
->flags
))
279 snd_usb_endpoint_stop(subs
->data_endpoint
);
282 snd_usb_endpoint_sync_pending_stop(subs
->sync_endpoint
);
283 snd_usb_endpoint_sync_pending_stop(subs
->data_endpoint
);
287 static int deactivate_endpoints(struct snd_usb_substream
*subs
)
291 reta
= snd_usb_endpoint_deactivate(subs
->sync_endpoint
);
292 retb
= snd_usb_endpoint_deactivate(subs
->data_endpoint
);
304 * find a matching format and set up the interface
306 static int set_format(struct snd_usb_substream
*subs
, struct audioformat
*fmt
)
308 struct usb_device
*dev
= subs
->dev
;
309 struct usb_host_interface
*alts
;
310 struct usb_interface_descriptor
*altsd
;
311 struct usb_interface
*iface
;
312 unsigned int ep
, attr
;
313 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
314 int err
, implicit_fb
= 0;
316 iface
= usb_ifnum_to_if(dev
, fmt
->iface
);
319 alts
= &iface
->altsetting
[fmt
->altset_idx
];
320 altsd
= get_iface_desc(alts
);
321 if (WARN_ON(altsd
->bAlternateSetting
!= fmt
->altsetting
))
324 if (fmt
== subs
->cur_audiofmt
)
327 /* close the old interface */
328 if (subs
->interface
>= 0 && subs
->interface
!= fmt
->iface
) {
329 err
= usb_set_interface(subs
->dev
, subs
->interface
, 0);
331 snd_printk(KERN_ERR
"%d:%d:%d: return to setting 0 failed (%d)\n",
332 dev
->devnum
, fmt
->iface
, fmt
->altsetting
, err
);
335 subs
->interface
= -1;
336 subs
->altset_idx
= 0;
340 if (subs
->interface
!= fmt
->iface
||
341 subs
->altset_idx
!= fmt
->altset_idx
) {
342 err
= usb_set_interface(dev
, fmt
->iface
, fmt
->altsetting
);
344 snd_printk(KERN_ERR
"%d:%d:%d: usb_set_interface failed (%d)\n",
345 dev
->devnum
, fmt
->iface
, fmt
->altsetting
, err
);
348 snd_printdd(KERN_INFO
"setting usb interface %d:%d\n",
349 fmt
->iface
, fmt
->altsetting
);
350 subs
->interface
= fmt
->iface
;
351 subs
->altset_idx
= fmt
->altset_idx
;
353 snd_usb_set_interface_quirk(dev
);
356 subs
->data_endpoint
= snd_usb_add_endpoint(subs
->stream
->chip
,
357 alts
, fmt
->endpoint
, subs
->direction
,
358 SND_USB_ENDPOINT_TYPE_DATA
);
359 if (!subs
->data_endpoint
)
362 /* we need a sync pipe in async OUT or adaptive IN mode */
363 /* check the number of EP, since some devices have broken
364 * descriptors which fool us. if it has only one EP,
365 * assume it as adaptive-out or sync-in.
367 attr
= fmt
->ep_attr
& USB_ENDPOINT_SYNCTYPE
;
369 switch (subs
->stream
->chip
->usb_id
) {
370 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
371 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
375 iface
= usb_ifnum_to_if(dev
, 3);
377 if (!iface
|| iface
->num_altsetting
== 0)
380 alts
= &iface
->altsetting
[1];
384 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
385 case USB_ID(0x0763, 0x2081):
389 iface
= usb_ifnum_to_if(dev
, 2);
391 if (!iface
|| iface
->num_altsetting
== 0)
394 alts
= &iface
->altsetting
[1];
399 if (((is_playback
&& attr
== USB_ENDPOINT_SYNC_ASYNC
) ||
400 (!is_playback
&& attr
== USB_ENDPOINT_SYNC_ADAPTIVE
)) &&
401 altsd
->bNumEndpoints
>= 2) {
402 /* check sync-pipe endpoint */
403 /* ... and check descriptor size before accessing bSynchAddress
404 because there is a version of the SB Audigy 2 NX firmware lacking
405 the audio fields in the endpoint descriptors */
406 if ((get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) != USB_ENDPOINT_XFER_ISOC
||
407 (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
408 get_endpoint(alts
, 1)->bSynchAddress
!= 0 &&
410 snd_printk(KERN_ERR
"%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
411 dev
->devnum
, fmt
->iface
, fmt
->altsetting
,
412 get_endpoint(alts
, 1)->bmAttributes
,
413 get_endpoint(alts
, 1)->bLength
,
414 get_endpoint(alts
, 1)->bSynchAddress
);
417 ep
= get_endpoint(alts
, 1)->bEndpointAddress
;
419 get_endpoint(alts
, 0)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
420 (( is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
| USB_DIR_IN
)) ||
421 (!is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
& ~USB_DIR_IN
)))) {
422 snd_printk(KERN_ERR
"%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
423 dev
->devnum
, fmt
->iface
, fmt
->altsetting
,
424 is_playback
, ep
, get_endpoint(alts
, 0)->bSynchAddress
);
428 implicit_fb
= (get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_USAGE_MASK
)
429 == USB_ENDPOINT_USAGE_IMPLICIT_FB
;
432 subs
->sync_endpoint
= snd_usb_add_endpoint(subs
->stream
->chip
,
433 alts
, ep
, !subs
->direction
,
435 SND_USB_ENDPOINT_TYPE_DATA
:
436 SND_USB_ENDPOINT_TYPE_SYNC
);
437 if (!subs
->sync_endpoint
)
440 subs
->data_endpoint
->sync_master
= subs
->sync_endpoint
;
443 if ((err
= snd_usb_init_pitch(subs
->stream
->chip
, fmt
->iface
, alts
, fmt
)) < 0)
446 subs
->cur_audiofmt
= fmt
;
448 snd_usb_set_format_quirk(subs
, fmt
);
452 "setting done: format = %d, rate = %d..%d, channels = %d\n",
453 fmt
->format
, fmt
->rate_min
, fmt
->rate_max
, fmt
->channels
);
455 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
456 subs
->datapipe
, subs
->syncpipe
);
463 * Return the score of matching two audioformats.
464 * Veto the audioformat if:
465 * - It has no channels for some reason.
466 * - Requested PCM format is not supported.
467 * - Requested sample rate is not supported.
469 static int match_endpoint_audioformats(struct audioformat
*fp
,
470 struct audioformat
*match
, int rate
,
471 snd_pcm_format_t pcm_format
)
476 if (fp
->channels
< 1) {
477 snd_printdd("%s: (fmt @%p) no channels\n", __func__
, fp
);
481 if (!(fp
->formats
& pcm_format_to_bits(pcm_format
))) {
482 snd_printdd("%s: (fmt @%p) no match for format %d\n", __func__
,
487 for (i
= 0; i
< fp
->nr_rates
; i
++) {
488 if (fp
->rate_table
[i
] == rate
) {
494 snd_printdd("%s: (fmt @%p) no match for rate %d\n", __func__
,
499 if (fp
->channels
== match
->channels
)
502 snd_printdd("%s: (fmt @%p) score %d\n", __func__
, fp
, score
);
508 * Configure the sync ep using the rate and pcm format of the data ep.
510 static int configure_sync_endpoint(struct snd_usb_substream
*subs
)
513 struct audioformat
*fp
;
514 struct audioformat
*sync_fp
= NULL
;
516 int sync_period_bytes
= subs
->period_bytes
;
517 struct snd_usb_substream
*sync_subs
=
518 &subs
->stream
->substream
[subs
->direction
^ 1];
520 if (subs
->sync_endpoint
->type
!= SND_USB_ENDPOINT_TYPE_DATA
||
522 return snd_usb_endpoint_set_params(subs
->sync_endpoint
,
530 /* Try to find the best matching audioformat. */
531 list_for_each_entry(fp
, &sync_subs
->fmt_list
, list
) {
532 int score
= match_endpoint_audioformats(fp
, subs
->cur_audiofmt
,
533 subs
->cur_rate
, subs
->pcm_format
);
535 if (score
> cur_score
) {
541 if (unlikely(sync_fp
== NULL
)) {
542 snd_printk(KERN_ERR
"%s: no valid audioformat for sync ep %x found\n",
543 __func__
, sync_subs
->ep_num
);
548 * Recalculate the period bytes if channel number differ between
549 * data and sync ep audioformat.
551 if (sync_fp
->channels
!= subs
->channels
) {
552 sync_period_bytes
= (subs
->period_bytes
/ subs
->channels
) *
554 snd_printdd("%s: adjusted sync ep period bytes (%d -> %d)\n",
555 __func__
, subs
->period_bytes
, sync_period_bytes
);
558 ret
= snd_usb_endpoint_set_params(subs
->sync_endpoint
,
570 * configure endpoint params
572 * called during initial setup and upon resume
574 static int configure_endpoint(struct snd_usb_substream
*subs
)
579 stop_endpoints(subs
, true);
580 ret
= snd_usb_endpoint_set_params(subs
->data_endpoint
,
586 subs
->sync_endpoint
);
590 if (subs
->sync_endpoint
)
591 ret
= configure_sync_endpoint(subs
);
599 * allocate a buffer and set the given audio format.
601 * so far we use a physically linear buffer although packetize transfer
602 * doesn't need a continuous area.
603 * if sg buffer is supported on the later version of alsa, we'll follow
606 static int snd_usb_hw_params(struct snd_pcm_substream
*substream
,
607 struct snd_pcm_hw_params
*hw_params
)
609 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
610 struct audioformat
*fmt
;
613 ret
= snd_pcm_lib_alloc_vmalloc_buffer(substream
,
614 params_buffer_bytes(hw_params
));
618 subs
->pcm_format
= params_format(hw_params
);
619 subs
->period_bytes
= params_period_bytes(hw_params
);
620 subs
->channels
= params_channels(hw_params
);
621 subs
->cur_rate
= params_rate(hw_params
);
623 fmt
= find_format(subs
);
625 snd_printd(KERN_DEBUG
"cannot set format: format = %#x, rate = %d, channels = %d\n",
626 subs
->pcm_format
, subs
->cur_rate
, subs
->channels
);
630 down_read(&subs
->stream
->chip
->shutdown_rwsem
);
631 if (subs
->stream
->chip
->shutdown
)
634 ret
= set_format(subs
, fmt
);
635 up_read(&subs
->stream
->chip
->shutdown_rwsem
);
639 subs
->interface
= fmt
->iface
;
640 subs
->altset_idx
= fmt
->altset_idx
;
641 subs
->need_setup_ep
= true;
649 * reset the audio format and release the buffer
651 static int snd_usb_hw_free(struct snd_pcm_substream
*substream
)
653 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
655 subs
->cur_audiofmt
= NULL
;
657 subs
->period_bytes
= 0;
658 down_read(&subs
->stream
->chip
->shutdown_rwsem
);
659 if (!subs
->stream
->chip
->shutdown
) {
660 stop_endpoints(subs
, true);
661 deactivate_endpoints(subs
);
663 up_read(&subs
->stream
->chip
->shutdown_rwsem
);
664 return snd_pcm_lib_free_vmalloc_buffer(substream
);
670 * only a few subtle things...
672 static int snd_usb_pcm_prepare(struct snd_pcm_substream
*substream
)
674 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
675 struct snd_usb_substream
*subs
= runtime
->private_data
;
676 struct usb_host_interface
*alts
;
677 struct usb_interface
*iface
;
680 if (! subs
->cur_audiofmt
) {
681 snd_printk(KERN_ERR
"usbaudio: no format is specified!\n");
685 down_read(&subs
->stream
->chip
->shutdown_rwsem
);
686 if (subs
->stream
->chip
->shutdown
) {
690 if (snd_BUG_ON(!subs
->data_endpoint
)) {
695 snd_usb_endpoint_sync_pending_stop(subs
->sync_endpoint
);
696 snd_usb_endpoint_sync_pending_stop(subs
->data_endpoint
);
698 ret
= set_format(subs
, subs
->cur_audiofmt
);
702 iface
= usb_ifnum_to_if(subs
->dev
, subs
->cur_audiofmt
->iface
);
703 alts
= &iface
->altsetting
[subs
->cur_audiofmt
->altset_idx
];
704 ret
= snd_usb_init_sample_rate(subs
->stream
->chip
,
705 subs
->cur_audiofmt
->iface
,
712 if (subs
->need_setup_ep
) {
713 ret
= configure_endpoint(subs
);
716 subs
->need_setup_ep
= false;
719 /* some unit conversions in runtime */
720 subs
->data_endpoint
->maxframesize
=
721 bytes_to_frames(runtime
, subs
->data_endpoint
->maxpacksize
);
722 subs
->data_endpoint
->curframesize
=
723 bytes_to_frames(runtime
, subs
->data_endpoint
->curpacksize
);
725 /* reset the pointer */
726 subs
->hwptr_done
= 0;
727 subs
->transfer_done
= 0;
728 subs
->last_delay
= 0;
729 subs
->last_frame_number
= 0;
732 /* for playback, submit the URBs now; otherwise, the first hwptr_done
733 * updates for all URBs would happen at the same time when starting */
734 if (subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
)
735 ret
= start_endpoints(subs
, true);
738 up_read(&subs
->stream
->chip
->shutdown_rwsem
);
742 static struct snd_pcm_hardware snd_usb_hardware
=
744 .info
= SNDRV_PCM_INFO_MMAP
|
745 SNDRV_PCM_INFO_MMAP_VALID
|
746 SNDRV_PCM_INFO_BATCH
|
747 SNDRV_PCM_INFO_INTERLEAVED
|
748 SNDRV_PCM_INFO_BLOCK_TRANSFER
|
749 SNDRV_PCM_INFO_PAUSE
,
750 .buffer_bytes_max
= 1024 * 1024,
751 .period_bytes_min
= 64,
752 .period_bytes_max
= 512 * 1024,
757 static int hw_check_valid_format(struct snd_usb_substream
*subs
,
758 struct snd_pcm_hw_params
*params
,
759 struct audioformat
*fp
)
761 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
762 struct snd_interval
*ct
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
763 struct snd_mask
*fmts
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
764 struct snd_interval
*pt
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
);
765 struct snd_mask check_fmts
;
768 /* check the format */
769 snd_mask_none(&check_fmts
);
770 check_fmts
.bits
[0] = (u32
)fp
->formats
;
771 check_fmts
.bits
[1] = (u32
)(fp
->formats
>> 32);
772 snd_mask_intersect(&check_fmts
, fmts
);
773 if (snd_mask_empty(&check_fmts
)) {
774 hwc_debug(" > check: no supported format %d\n", fp
->format
);
777 /* check the channels */
778 if (fp
->channels
< ct
->min
|| fp
->channels
> ct
->max
) {
779 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp
->channels
, ct
->min
, ct
->max
);
782 /* check the rate is within the range */
783 if (fp
->rate_min
> it
->max
|| (fp
->rate_min
== it
->max
&& it
->openmax
)) {
784 hwc_debug(" > check: rate_min %d > max %d\n", fp
->rate_min
, it
->max
);
787 if (fp
->rate_max
< it
->min
|| (fp
->rate_max
== it
->min
&& it
->openmin
)) {
788 hwc_debug(" > check: rate_max %d < min %d\n", fp
->rate_max
, it
->min
);
791 /* check whether the period time is >= the data packet interval */
792 if (subs
->speed
!= USB_SPEED_FULL
) {
793 ptime
= 125 * (1 << fp
->datainterval
);
794 if (ptime
> pt
->max
|| (ptime
== pt
->max
&& pt
->openmax
)) {
795 hwc_debug(" > check: ptime %u > max %u\n", ptime
, pt
->max
);
802 static int hw_rule_rate(struct snd_pcm_hw_params
*params
,
803 struct snd_pcm_hw_rule
*rule
)
805 struct snd_usb_substream
*subs
= rule
->private;
806 struct audioformat
*fp
;
807 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
808 unsigned int rmin
, rmax
;
811 hwc_debug("hw_rule_rate: (%d,%d)\n", it
->min
, it
->max
);
814 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
815 if (!hw_check_valid_format(subs
, params
, fp
))
818 if (rmin
> fp
->rate_min
)
820 if (rmax
< fp
->rate_max
)
829 hwc_debug(" --> get empty\n");
835 if (it
->min
< rmin
) {
840 if (it
->max
> rmax
) {
845 if (snd_interval_checkempty(it
)) {
849 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
854 static int hw_rule_channels(struct snd_pcm_hw_params
*params
,
855 struct snd_pcm_hw_rule
*rule
)
857 struct snd_usb_substream
*subs
= rule
->private;
858 struct audioformat
*fp
;
859 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
860 unsigned int rmin
, rmax
;
863 hwc_debug("hw_rule_channels: (%d,%d)\n", it
->min
, it
->max
);
866 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
867 if (!hw_check_valid_format(subs
, params
, fp
))
870 if (rmin
> fp
->channels
)
872 if (rmax
< fp
->channels
)
881 hwc_debug(" --> get empty\n");
887 if (it
->min
< rmin
) {
892 if (it
->max
> rmax
) {
897 if (snd_interval_checkempty(it
)) {
901 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
905 static int hw_rule_format(struct snd_pcm_hw_params
*params
,
906 struct snd_pcm_hw_rule
*rule
)
908 struct snd_usb_substream
*subs
= rule
->private;
909 struct audioformat
*fp
;
910 struct snd_mask
*fmt
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
915 hwc_debug("hw_rule_format: %x:%x\n", fmt
->bits
[0], fmt
->bits
[1]);
917 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
918 if (!hw_check_valid_format(subs
, params
, fp
))
920 fbits
|= fp
->formats
;
923 oldbits
[0] = fmt
->bits
[0];
924 oldbits
[1] = fmt
->bits
[1];
925 fmt
->bits
[0] &= (u32
)fbits
;
926 fmt
->bits
[1] &= (u32
)(fbits
>> 32);
927 if (!fmt
->bits
[0] && !fmt
->bits
[1]) {
928 hwc_debug(" --> get empty\n");
931 changed
= (oldbits
[0] != fmt
->bits
[0] || oldbits
[1] != fmt
->bits
[1]);
932 hwc_debug(" --> %x:%x (changed = %d)\n", fmt
->bits
[0], fmt
->bits
[1], changed
);
936 static int hw_rule_period_time(struct snd_pcm_hw_params
*params
,
937 struct snd_pcm_hw_rule
*rule
)
939 struct snd_usb_substream
*subs
= rule
->private;
940 struct audioformat
*fp
;
941 struct snd_interval
*it
;
942 unsigned char min_datainterval
;
946 it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
);
947 hwc_debug("hw_rule_period_time: (%u,%u)\n", it
->min
, it
->max
);
948 min_datainterval
= 0xff;
949 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
950 if (!hw_check_valid_format(subs
, params
, fp
))
952 min_datainterval
= min(min_datainterval
, fp
->datainterval
);
954 if (min_datainterval
== 0xff) {
955 hwc_debug(" --> get empty\n");
959 pmin
= 125 * (1 << min_datainterval
);
961 if (it
->min
< pmin
) {
966 if (snd_interval_checkempty(it
)) {
970 hwc_debug(" --> (%u,%u) (changed = %d)\n", it
->min
, it
->max
, changed
);
975 * If the device supports unusual bit rates, does the request meet these?
977 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime
*runtime
,
978 struct snd_usb_substream
*subs
)
980 struct audioformat
*fp
;
982 int count
= 0, needs_knot
= 0;
985 kfree(subs
->rate_list
.list
);
986 subs
->rate_list
.list
= NULL
;
988 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
989 if (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)
991 count
+= fp
->nr_rates
;
992 if (fp
->rates
& SNDRV_PCM_RATE_KNOT
)
998 subs
->rate_list
.list
= rate_list
=
999 kmalloc(sizeof(int) * count
, GFP_KERNEL
);
1000 if (!subs
->rate_list
.list
)
1002 subs
->rate_list
.count
= count
;
1003 subs
->rate_list
.mask
= 0;
1005 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
1007 for (i
= 0; i
< fp
->nr_rates
; i
++)
1008 rate_list
[count
++] = fp
->rate_table
[i
];
1010 err
= snd_pcm_hw_constraint_list(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1020 * set up the runtime hardware information.
1023 static int setup_hw_info(struct snd_pcm_runtime
*runtime
, struct snd_usb_substream
*subs
)
1025 struct audioformat
*fp
;
1026 unsigned int pt
, ptmin
;
1027 int param_period_time_if_needed
;
1030 runtime
->hw
.formats
= subs
->formats
;
1032 runtime
->hw
.rate_min
= 0x7fffffff;
1033 runtime
->hw
.rate_max
= 0;
1034 runtime
->hw
.channels_min
= 256;
1035 runtime
->hw
.channels_max
= 0;
1036 runtime
->hw
.rates
= 0;
1038 /* check min/max rates and channels */
1039 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
1040 runtime
->hw
.rates
|= fp
->rates
;
1041 if (runtime
->hw
.rate_min
> fp
->rate_min
)
1042 runtime
->hw
.rate_min
= fp
->rate_min
;
1043 if (runtime
->hw
.rate_max
< fp
->rate_max
)
1044 runtime
->hw
.rate_max
= fp
->rate_max
;
1045 if (runtime
->hw
.channels_min
> fp
->channels
)
1046 runtime
->hw
.channels_min
= fp
->channels
;
1047 if (runtime
->hw
.channels_max
< fp
->channels
)
1048 runtime
->hw
.channels_max
= fp
->channels
;
1049 if (fp
->fmt_type
== UAC_FORMAT_TYPE_II
&& fp
->frame_size
> 0) {
1050 /* FIXME: there might be more than one audio formats... */
1051 runtime
->hw
.period_bytes_min
= runtime
->hw
.period_bytes_max
=
1054 pt
= 125 * (1 << fp
->datainterval
);
1055 ptmin
= min(ptmin
, pt
);
1057 err
= snd_usb_autoresume(subs
->stream
->chip
);
1061 param_period_time_if_needed
= SNDRV_PCM_HW_PARAM_PERIOD_TIME
;
1062 if (subs
->speed
== USB_SPEED_FULL
)
1063 /* full speed devices have fixed data packet interval */
1066 /* if period time doesn't go below 1 ms, no rules needed */
1067 param_period_time_if_needed
= -1;
1068 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1071 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1073 SNDRV_PCM_HW_PARAM_FORMAT
,
1074 SNDRV_PCM_HW_PARAM_CHANNELS
,
1075 param_period_time_if_needed
,
1078 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1079 hw_rule_channels
, subs
,
1080 SNDRV_PCM_HW_PARAM_FORMAT
,
1081 SNDRV_PCM_HW_PARAM_RATE
,
1082 param_period_time_if_needed
,
1085 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1086 hw_rule_format
, subs
,
1087 SNDRV_PCM_HW_PARAM_RATE
,
1088 SNDRV_PCM_HW_PARAM_CHANNELS
,
1089 param_period_time_if_needed
,
1092 if (param_period_time_if_needed
>= 0) {
1093 err
= snd_pcm_hw_rule_add(runtime
, 0,
1094 SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1095 hw_rule_period_time
, subs
,
1096 SNDRV_PCM_HW_PARAM_FORMAT
,
1097 SNDRV_PCM_HW_PARAM_CHANNELS
,
1098 SNDRV_PCM_HW_PARAM_RATE
,
1103 if ((err
= snd_usb_pcm_check_knot(runtime
, subs
)) < 0)
1108 snd_usb_autosuspend(subs
->stream
->chip
);
1112 static int snd_usb_pcm_open(struct snd_pcm_substream
*substream
, int direction
)
1114 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
1115 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1116 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
1118 subs
->interface
= -1;
1119 subs
->altset_idx
= 0;
1120 runtime
->hw
= snd_usb_hardware
;
1121 runtime
->private_data
= subs
;
1122 subs
->pcm_substream
= substream
;
1123 /* runtime PM is also done there */
1125 /* initialize DSD/DOP context */
1126 subs
->dsd_dop
.byte_idx
= 0;
1127 subs
->dsd_dop
.channel
= 0;
1128 subs
->dsd_dop
.marker
= 1;
1130 return setup_hw_info(runtime
, subs
);
1133 static int snd_usb_pcm_close(struct snd_pcm_substream
*substream
, int direction
)
1135 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
1136 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
1138 stop_endpoints(subs
, true);
1140 if (!as
->chip
->shutdown
&& subs
->interface
>= 0) {
1141 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1142 subs
->interface
= -1;
1145 subs
->pcm_substream
= NULL
;
1146 snd_usb_autosuspend(subs
->stream
->chip
);
1151 /* Since a URB can handle only a single linear buffer, we must use double
1152 * buffering when the data to be transferred overflows the buffer boundary.
1153 * To avoid inconsistencies when updating hwptr_done, we use double buffering
1156 static void retire_capture_urb(struct snd_usb_substream
*subs
,
1159 struct snd_pcm_runtime
*runtime
= subs
->pcm_substream
->runtime
;
1160 unsigned int stride
, frames
, bytes
, oldptr
;
1161 int i
, period_elapsed
= 0;
1162 unsigned long flags
;
1164 int current_frame_number
;
1166 /* read frame number here, update pointer in critical section */
1167 current_frame_number
= usb_get_current_frame_number(subs
->dev
);
1169 stride
= runtime
->frame_bits
>> 3;
1171 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1172 cp
= (unsigned char *)urb
->transfer_buffer
+ urb
->iso_frame_desc
[i
].offset
+ subs
->pkt_offset_adj
;
1173 if (urb
->iso_frame_desc
[i
].status
&& printk_ratelimit()) {
1174 snd_printdd(KERN_ERR
"frame %d active: %d\n", i
, urb
->iso_frame_desc
[i
].status
);
1177 bytes
= urb
->iso_frame_desc
[i
].actual_length
;
1178 frames
= bytes
/ stride
;
1179 if (!subs
->txfr_quirk
)
1180 bytes
= frames
* stride
;
1181 if (bytes
% (runtime
->sample_bits
>> 3) != 0) {
1182 int oldbytes
= bytes
;
1183 bytes
= frames
* stride
;
1184 snd_printdd(KERN_ERR
"Corrected urb data len. %d->%d\n",
1187 /* update the current pointer */
1188 spin_lock_irqsave(&subs
->lock
, flags
);
1189 oldptr
= subs
->hwptr_done
;
1190 subs
->hwptr_done
+= bytes
;
1191 if (subs
->hwptr_done
>= runtime
->buffer_size
* stride
)
1192 subs
->hwptr_done
-= runtime
->buffer_size
* stride
;
1193 frames
= (bytes
+ (oldptr
% stride
)) / stride
;
1194 subs
->transfer_done
+= frames
;
1195 if (subs
->transfer_done
>= runtime
->period_size
) {
1196 subs
->transfer_done
-= runtime
->period_size
;
1199 /* capture delay is by construction limited to one URB,
1202 runtime
->delay
= subs
->last_delay
= 0;
1204 /* realign last_frame_number */
1205 subs
->last_frame_number
= current_frame_number
;
1206 subs
->last_frame_number
&= 0xFF; /* keep 8 LSBs */
1208 spin_unlock_irqrestore(&subs
->lock
, flags
);
1209 /* copy a data chunk */
1210 if (oldptr
+ bytes
> runtime
->buffer_size
* stride
) {
1211 unsigned int bytes1
=
1212 runtime
->buffer_size
* stride
- oldptr
;
1213 memcpy(runtime
->dma_area
+ oldptr
, cp
, bytes1
);
1214 memcpy(runtime
->dma_area
, cp
+ bytes1
, bytes
- bytes1
);
1216 memcpy(runtime
->dma_area
+ oldptr
, cp
, bytes
);
1221 snd_pcm_period_elapsed(subs
->pcm_substream
);
1224 static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream
*subs
,
1225 struct urb
*urb
, unsigned int bytes
)
1227 struct snd_pcm_runtime
*runtime
= subs
->pcm_substream
->runtime
;
1228 unsigned int stride
= runtime
->frame_bits
>> 3;
1229 unsigned int dst_idx
= 0;
1230 unsigned int src_idx
= subs
->hwptr_done
;
1231 unsigned int wrap
= runtime
->buffer_size
* stride
;
1232 u8
*dst
= urb
->transfer_buffer
;
1233 u8
*src
= runtime
->dma_area
;
1234 u8 marker
[] = { 0x05, 0xfa };
1237 * The DSP DOP format defines a way to transport DSD samples over
1238 * normal PCM data endpoints. It requires stuffing of marker bytes
1239 * (0x05 and 0xfa, alternating per sample frame), and then expects
1240 * 2 additional bytes of actual payload. The whole frame is stored
1243 * Hence, for a stereo transport, the buffer layout looks like this,
1244 * where L refers to left channel samples and R to right.
1246 * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa
1247 * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa
1253 if (++subs
->dsd_dop
.byte_idx
== 3) {
1254 /* frame boundary? */
1255 dst
[dst_idx
++] = marker
[subs
->dsd_dop
.marker
];
1257 subs
->dsd_dop
.byte_idx
= 0;
1259 if (++subs
->dsd_dop
.channel
% runtime
->channels
== 0) {
1260 /* alternate the marker */
1261 subs
->dsd_dop
.marker
++;
1262 subs
->dsd_dop
.marker
%= ARRAY_SIZE(marker
);
1263 subs
->dsd_dop
.channel
= 0;
1266 /* stuff the DSD payload */
1267 int idx
= (src_idx
+ subs
->dsd_dop
.byte_idx
- 1) % wrap
;
1269 if (subs
->cur_audiofmt
->dsd_bitrev
)
1270 dst
[dst_idx
++] = bitrev8(src
[idx
]);
1272 dst
[dst_idx
++] = src
[idx
];
1279 static void prepare_playback_urb(struct snd_usb_substream
*subs
,
1282 struct snd_pcm_runtime
*runtime
= subs
->pcm_substream
->runtime
;
1283 struct snd_usb_endpoint
*ep
= subs
->data_endpoint
;
1284 struct snd_urb_ctx
*ctx
= urb
->context
;
1285 unsigned int counts
, frames
, bytes
;
1286 int i
, stride
, period_elapsed
= 0;
1287 unsigned long flags
;
1289 stride
= runtime
->frame_bits
>> 3;
1292 urb
->number_of_packets
= 0;
1293 spin_lock_irqsave(&subs
->lock
, flags
);
1294 for (i
= 0; i
< ctx
->packets
; i
++) {
1295 if (ctx
->packet_size
[i
])
1296 counts
= ctx
->packet_size
[i
];
1298 counts
= snd_usb_endpoint_next_packet_size(ep
);
1300 /* set up descriptor */
1301 urb
->iso_frame_desc
[i
].offset
= frames
* ep
->stride
;
1302 urb
->iso_frame_desc
[i
].length
= counts
* ep
->stride
;
1304 urb
->number_of_packets
++;
1305 subs
->transfer_done
+= counts
;
1306 if (subs
->transfer_done
>= runtime
->period_size
) {
1307 subs
->transfer_done
-= runtime
->period_size
;
1309 if (subs
->fmt_type
== UAC_FORMAT_TYPE_II
) {
1310 if (subs
->transfer_done
> 0) {
1311 /* FIXME: fill-max mode is not
1313 frames
-= subs
->transfer_done
;
1314 counts
-= subs
->transfer_done
;
1315 urb
->iso_frame_desc
[i
].length
=
1316 counts
* ep
->stride
;
1317 subs
->transfer_done
= 0;
1320 if (i
< ctx
->packets
) {
1321 /* add a transfer delimiter */
1322 urb
->iso_frame_desc
[i
].offset
=
1323 frames
* ep
->stride
;
1324 urb
->iso_frame_desc
[i
].length
= 0;
1325 urb
->number_of_packets
++;
1330 if (period_elapsed
&&
1331 !snd_usb_endpoint_implicit_feedback_sink(subs
->data_endpoint
)) /* finish at the period boundary */
1334 bytes
= frames
* ep
->stride
;
1336 if (unlikely(subs
->pcm_format
== SNDRV_PCM_FORMAT_DSD_U16_LE
&&
1337 subs
->cur_audiofmt
->dsd_dop
)) {
1338 fill_playback_urb_dsd_dop(subs
, urb
, bytes
);
1339 } else if (unlikely(subs
->pcm_format
== SNDRV_PCM_FORMAT_DSD_U8
&&
1340 subs
->cur_audiofmt
->dsd_bitrev
)) {
1341 /* bit-reverse the bytes */
1342 u8
*buf
= urb
->transfer_buffer
;
1343 for (i
= 0; i
< bytes
; i
++) {
1344 int idx
= (subs
->hwptr_done
+ i
)
1345 % (runtime
->buffer_size
* stride
);
1346 buf
[i
] = bitrev8(runtime
->dma_area
[idx
]);
1349 subs
->hwptr_done
+= bytes
;
1352 if (subs
->hwptr_done
+ bytes
> runtime
->buffer_size
* stride
) {
1353 /* err, the transferred area goes over buffer boundary. */
1354 unsigned int bytes1
=
1355 runtime
->buffer_size
* stride
- subs
->hwptr_done
;
1356 memcpy(urb
->transfer_buffer
,
1357 runtime
->dma_area
+ subs
->hwptr_done
, bytes1
);
1358 memcpy(urb
->transfer_buffer
+ bytes1
,
1359 runtime
->dma_area
, bytes
- bytes1
);
1361 memcpy(urb
->transfer_buffer
,
1362 runtime
->dma_area
+ subs
->hwptr_done
, bytes
);
1365 subs
->hwptr_done
+= bytes
;
1368 if (subs
->hwptr_done
>= runtime
->buffer_size
* stride
)
1369 subs
->hwptr_done
-= runtime
->buffer_size
* stride
;
1371 /* update delay with exact number of samples queued */
1372 runtime
->delay
= subs
->last_delay
;
1373 runtime
->delay
+= frames
;
1374 subs
->last_delay
= runtime
->delay
;
1376 /* realign last_frame_number */
1377 subs
->last_frame_number
= usb_get_current_frame_number(subs
->dev
);
1378 subs
->last_frame_number
&= 0xFF; /* keep 8 LSBs */
1380 spin_unlock_irqrestore(&subs
->lock
, flags
);
1381 urb
->transfer_buffer_length
= bytes
;
1383 snd_pcm_period_elapsed(subs
->pcm_substream
);
1387 * process after playback data complete
1388 * - decrease the delay count again
1390 static void retire_playback_urb(struct snd_usb_substream
*subs
,
1393 unsigned long flags
;
1394 struct snd_pcm_runtime
*runtime
= subs
->pcm_substream
->runtime
;
1395 struct snd_usb_endpoint
*ep
= subs
->data_endpoint
;
1396 int processed
= urb
->transfer_buffer_length
/ ep
->stride
;
1399 /* ignore the delay accounting when procssed=0 is given, i.e.
1400 * silent payloads are procssed before handling the actual data
1405 spin_lock_irqsave(&subs
->lock
, flags
);
1406 if (!subs
->last_delay
)
1407 goto out
; /* short path */
1409 est_delay
= snd_usb_pcm_delay(subs
, runtime
->rate
);
1410 /* update delay with exact number of samples played */
1411 if (processed
> subs
->last_delay
)
1412 subs
->last_delay
= 0;
1414 subs
->last_delay
-= processed
;
1415 runtime
->delay
= subs
->last_delay
;
1418 * Report when delay estimate is off by more than 2ms.
1419 * The error should be lower than 2ms since the estimate relies
1420 * on two reads of a counter updated every ms.
1422 if (abs(est_delay
- subs
->last_delay
) * 1000 > runtime
->rate
* 2)
1423 snd_printk(KERN_DEBUG
"delay: estimated %d, actual %d\n",
1424 est_delay
, subs
->last_delay
);
1426 if (!subs
->running
) {
1427 /* update last_frame_number for delay counting here since
1428 * prepare_playback_urb won't be called during pause
1430 subs
->last_frame_number
=
1431 usb_get_current_frame_number(subs
->dev
) & 0xff;
1435 spin_unlock_irqrestore(&subs
->lock
, flags
);
1438 static int snd_usb_playback_open(struct snd_pcm_substream
*substream
)
1440 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
1443 static int snd_usb_playback_close(struct snd_pcm_substream
*substream
)
1445 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
1448 static int snd_usb_capture_open(struct snd_pcm_substream
*substream
)
1450 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_CAPTURE
);
1453 static int snd_usb_capture_close(struct snd_pcm_substream
*substream
)
1455 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_CAPTURE
);
1458 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream
*substream
,
1461 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
1464 case SNDRV_PCM_TRIGGER_START
:
1465 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1466 subs
->data_endpoint
->prepare_data_urb
= prepare_playback_urb
;
1467 subs
->data_endpoint
->retire_data_urb
= retire_playback_urb
;
1470 case SNDRV_PCM_TRIGGER_STOP
:
1471 stop_endpoints(subs
, false);
1474 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1475 subs
->data_endpoint
->prepare_data_urb
= NULL
;
1476 /* keep retire_data_urb for delay calculation */
1477 subs
->data_endpoint
->retire_data_urb
= retire_playback_urb
;
1485 static int snd_usb_substream_capture_trigger(struct snd_pcm_substream
*substream
,
1489 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
1492 case SNDRV_PCM_TRIGGER_START
:
1493 err
= start_endpoints(subs
, false);
1497 subs
->data_endpoint
->retire_data_urb
= retire_capture_urb
;
1500 case SNDRV_PCM_TRIGGER_STOP
:
1501 stop_endpoints(subs
, false);
1504 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1505 subs
->data_endpoint
->retire_data_urb
= NULL
;
1508 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1509 subs
->data_endpoint
->retire_data_urb
= retire_capture_urb
;
1517 static struct snd_pcm_ops snd_usb_playback_ops
= {
1518 .open
= snd_usb_playback_open
,
1519 .close
= snd_usb_playback_close
,
1520 .ioctl
= snd_pcm_lib_ioctl
,
1521 .hw_params
= snd_usb_hw_params
,
1522 .hw_free
= snd_usb_hw_free
,
1523 .prepare
= snd_usb_pcm_prepare
,
1524 .trigger
= snd_usb_substream_playback_trigger
,
1525 .pointer
= snd_usb_pcm_pointer
,
1526 .page
= snd_pcm_lib_get_vmalloc_page
,
1527 .mmap
= snd_pcm_lib_mmap_vmalloc
,
1530 static struct snd_pcm_ops snd_usb_capture_ops
= {
1531 .open
= snd_usb_capture_open
,
1532 .close
= snd_usb_capture_close
,
1533 .ioctl
= snd_pcm_lib_ioctl
,
1534 .hw_params
= snd_usb_hw_params
,
1535 .hw_free
= snd_usb_hw_free
,
1536 .prepare
= snd_usb_pcm_prepare
,
1537 .trigger
= snd_usb_substream_capture_trigger
,
1538 .pointer
= snd_usb_pcm_pointer
,
1539 .page
= snd_pcm_lib_get_vmalloc_page
,
1540 .mmap
= snd_pcm_lib_mmap_vmalloc
,
1543 void snd_usb_set_pcm_ops(struct snd_pcm
*pcm
, int stream
)
1545 snd_pcm_set_ops(pcm
, stream
,
1546 stream
== SNDRV_PCM_STREAM_PLAYBACK
?
1547 &snd_usb_playback_ops
: &snd_usb_capture_ops
);