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/ratelimit.h>
20 #include <linux/usb.h>
21 #include <linux/usb/audio.h>
22 #include <linux/usb/audio-v2.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
38 #define SUBSTREAM_FLAG_DATA_EP_STARTED 0
39 #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
41 /* return the estimated delay based on USB frame counters */
42 snd_pcm_uframes_t
snd_usb_pcm_delay(struct snd_usb_substream
*subs
,
45 int current_frame_number
;
49 current_frame_number
= usb_get_current_frame_number(subs
->dev
);
51 * HCD implementations use different widths, use lower 8 bits.
52 * The delay will be managed up to 256ms, which is more than
55 frame_diff
= (current_frame_number
- subs
->last_frame_number
) & 0xff;
57 /* Approximation based on number of samples per USB frame (ms),
58 some truncation for 44.1 but the estimate is good enough */
59 est_delay
= subs
->last_delay
- (frame_diff
* rate
/ 1000);
66 * return the current pcm pointer. just based on the hwptr_done value.
68 static snd_pcm_uframes_t
snd_usb_pcm_pointer(struct snd_pcm_substream
*substream
)
70 struct snd_usb_substream
*subs
;
71 unsigned int hwptr_done
;
73 subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
74 spin_lock(&subs
->lock
);
75 hwptr_done
= subs
->hwptr_done
;
76 substream
->runtime
->delay
= snd_usb_pcm_delay(subs
,
77 substream
->runtime
->rate
);
78 spin_unlock(&subs
->lock
);
79 return hwptr_done
/ (substream
->runtime
->frame_bits
>> 3);
83 * find a matching audio format
85 static struct audioformat
*find_format(struct snd_usb_substream
*subs
, unsigned int format
,
86 unsigned int rate
, unsigned int channels
)
89 struct audioformat
*found
= NULL
;
90 int cur_attr
= 0, attr
;
92 list_for_each(p
, &subs
->fmt_list
) {
93 struct audioformat
*fp
;
94 fp
= list_entry(p
, struct audioformat
, list
);
95 if (!(fp
->formats
& (1uLL << format
)))
97 if (fp
->channels
!= channels
)
99 if (rate
< fp
->rate_min
|| rate
> fp
->rate_max
)
101 if (! (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)) {
103 for (i
= 0; i
< fp
->nr_rates
; i
++)
104 if (fp
->rate_table
[i
] == rate
)
106 if (i
>= fp
->nr_rates
)
109 attr
= fp
->ep_attr
& USB_ENDPOINT_SYNCTYPE
;
115 /* avoid async out and adaptive in if the other method
116 * supports the same format.
117 * this is a workaround for the case like
118 * M-audio audiophile USB.
120 if (attr
!= cur_attr
) {
121 if ((attr
== USB_ENDPOINT_SYNC_ASYNC
&&
122 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
123 (attr
== USB_ENDPOINT_SYNC_ADAPTIVE
&&
124 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
))
126 if ((cur_attr
== USB_ENDPOINT_SYNC_ASYNC
&&
127 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
128 (cur_attr
== USB_ENDPOINT_SYNC_ADAPTIVE
&&
129 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
)) {
135 /* find the format with the largest max. packet size */
136 if (fp
->maxpacksize
> found
->maxpacksize
) {
144 static int init_pitch_v1(struct snd_usb_audio
*chip
, int iface
,
145 struct usb_host_interface
*alts
,
146 struct audioformat
*fmt
)
148 struct usb_device
*dev
= chip
->dev
;
150 unsigned char data
[1];
153 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
156 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), UAC_SET_CUR
,
157 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
158 UAC_EP_CS_ATTR_PITCH_CONTROL
<< 8, ep
,
159 data
, sizeof(data
))) < 0) {
160 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH\n",
161 dev
->devnum
, iface
, ep
);
168 static int init_pitch_v2(struct snd_usb_audio
*chip
, int iface
,
169 struct usb_host_interface
*alts
,
170 struct audioformat
*fmt
)
172 struct usb_device
*dev
= chip
->dev
;
173 unsigned char data
[1];
177 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
180 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), UAC2_CS_CUR
,
181 USB_TYPE_CLASS
| USB_RECIP_ENDPOINT
| USB_DIR_OUT
,
182 UAC2_EP_CS_PITCH
<< 8, 0,
183 data
, sizeof(data
))) < 0) {
184 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH (v2)\n",
185 dev
->devnum
, iface
, fmt
->altsetting
);
193 * initialize the pitch control and sample rate
195 int snd_usb_init_pitch(struct snd_usb_audio
*chip
, int iface
,
196 struct usb_host_interface
*alts
,
197 struct audioformat
*fmt
)
199 struct usb_interface_descriptor
*altsd
= get_iface_desc(alts
);
201 /* if endpoint doesn't have pitch control, bail out */
202 if (!(fmt
->attributes
& UAC_EP_CS_ATTR_PITCH_CONTROL
))
205 switch (altsd
->bInterfaceProtocol
) {
208 return init_pitch_v1(chip
, iface
, alts
, fmt
);
211 return init_pitch_v2(chip
, iface
, alts
, fmt
);
215 static int start_endpoints(struct snd_usb_substream
*subs
)
219 if (!subs
->data_endpoint
)
222 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED
, &subs
->flags
)) {
223 struct snd_usb_endpoint
*ep
= subs
->data_endpoint
;
225 snd_printdd(KERN_DEBUG
"Starting data EP @%p\n", ep
);
227 ep
->data_subs
= subs
;
228 err
= snd_usb_endpoint_start(ep
);
230 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED
, &subs
->flags
);
235 if (subs
->sync_endpoint
&&
236 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED
, &subs
->flags
)) {
237 struct snd_usb_endpoint
*ep
= subs
->sync_endpoint
;
239 snd_printdd(KERN_DEBUG
"Starting sync EP @%p\n", ep
);
241 ep
->sync_slave
= subs
->data_endpoint
;
242 err
= snd_usb_endpoint_start(ep
);
244 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED
, &subs
->flags
);
252 static void stop_endpoints(struct snd_usb_substream
*subs
,
253 int force
, int can_sleep
, int wait
)
255 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED
, &subs
->flags
))
256 snd_usb_endpoint_stop(subs
->sync_endpoint
,
257 force
, can_sleep
, wait
);
259 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED
, &subs
->flags
))
260 snd_usb_endpoint_stop(subs
->data_endpoint
,
261 force
, can_sleep
, wait
);
264 static int deactivate_endpoints(struct snd_usb_substream
*subs
)
268 reta
= snd_usb_endpoint_deactivate(subs
->sync_endpoint
);
269 retb
= snd_usb_endpoint_deactivate(subs
->data_endpoint
);
281 * find a matching format and set up the interface
283 static int set_format(struct snd_usb_substream
*subs
, struct audioformat
*fmt
)
285 struct usb_device
*dev
= subs
->dev
;
286 struct usb_host_interface
*alts
;
287 struct usb_interface_descriptor
*altsd
;
288 struct usb_interface
*iface
;
289 unsigned int ep
, attr
;
290 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
291 int err
, implicit_fb
= 0;
293 iface
= usb_ifnum_to_if(dev
, fmt
->iface
);
296 alts
= &iface
->altsetting
[fmt
->altset_idx
];
297 altsd
= get_iface_desc(alts
);
298 if (WARN_ON(altsd
->bAlternateSetting
!= fmt
->altsetting
))
301 if (fmt
== subs
->cur_audiofmt
)
304 /* close the old interface */
305 if (subs
->interface
>= 0 && subs
->interface
!= fmt
->iface
) {
306 err
= usb_set_interface(subs
->dev
, subs
->interface
, 0);
308 snd_printk(KERN_ERR
"%d:%d:%d: return to setting 0 failed (%d)\n",
309 dev
->devnum
, fmt
->iface
, fmt
->altsetting
, err
);
312 subs
->interface
= -1;
313 subs
->altset_idx
= 0;
317 if (subs
->interface
!= fmt
->iface
||
318 subs
->altset_idx
!= fmt
->altset_idx
) {
319 err
= usb_set_interface(dev
, fmt
->iface
, fmt
->altsetting
);
321 snd_printk(KERN_ERR
"%d:%d:%d: usb_set_interface failed (%d)\n",
322 dev
->devnum
, fmt
->iface
, fmt
->altsetting
, err
);
325 snd_printdd(KERN_INFO
"setting usb interface %d:%d\n",
326 fmt
->iface
, fmt
->altsetting
);
327 subs
->interface
= fmt
->iface
;
328 subs
->altset_idx
= fmt
->altset_idx
;
331 subs
->data_endpoint
= snd_usb_add_endpoint(subs
->stream
->chip
,
332 alts
, fmt
->endpoint
, subs
->direction
,
333 SND_USB_ENDPOINT_TYPE_DATA
);
334 if (!subs
->data_endpoint
)
337 /* we need a sync pipe in async OUT or adaptive IN mode */
338 /* check the number of EP, since some devices have broken
339 * descriptors which fool us. if it has only one EP,
340 * assume it as adaptive-out or sync-in.
342 attr
= fmt
->ep_attr
& USB_ENDPOINT_SYNCTYPE
;
344 switch (subs
->stream
->chip
->usb_id
) {
345 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
346 case USB_ID(0x0763, 0x2081):
350 iface
= usb_ifnum_to_if(dev
, 2);
352 if (!iface
|| iface
->num_altsetting
== 0)
355 alts
= &iface
->altsetting
[1];
360 if (((is_playback
&& attr
== USB_ENDPOINT_SYNC_ASYNC
) ||
361 (!is_playback
&& attr
== USB_ENDPOINT_SYNC_ADAPTIVE
)) &&
362 altsd
->bNumEndpoints
>= 2) {
363 /* check sync-pipe endpoint */
364 /* ... and check descriptor size before accessing bSynchAddress
365 because there is a version of the SB Audigy 2 NX firmware lacking
366 the audio fields in the endpoint descriptors */
367 if ((get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) != 0x01 ||
368 (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
369 get_endpoint(alts
, 1)->bSynchAddress
!= 0 &&
371 snd_printk(KERN_ERR
"%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
372 dev
->devnum
, fmt
->iface
, fmt
->altsetting
,
373 get_endpoint(alts
, 1)->bmAttributes
,
374 get_endpoint(alts
, 1)->bLength
,
375 get_endpoint(alts
, 1)->bSynchAddress
);
378 ep
= get_endpoint(alts
, 1)->bEndpointAddress
;
380 get_endpoint(alts
, 0)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
381 (( is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
| USB_DIR_IN
)) ||
382 (!is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
& ~USB_DIR_IN
)))) {
383 snd_printk(KERN_ERR
"%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
384 dev
->devnum
, fmt
->iface
, fmt
->altsetting
,
385 is_playback
, ep
, get_endpoint(alts
, 0)->bSynchAddress
);
389 implicit_fb
= (get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_USAGE_MASK
)
390 == USB_ENDPOINT_USAGE_IMPLICIT_FB
;
393 subs
->sync_endpoint
= snd_usb_add_endpoint(subs
->stream
->chip
,
394 alts
, ep
, !subs
->direction
,
396 SND_USB_ENDPOINT_TYPE_DATA
:
397 SND_USB_ENDPOINT_TYPE_SYNC
);
398 if (!subs
->sync_endpoint
)
401 subs
->data_endpoint
->sync_master
= subs
->sync_endpoint
;
404 if ((err
= snd_usb_init_pitch(subs
->stream
->chip
, fmt
->iface
, alts
, fmt
)) < 0)
407 subs
->cur_audiofmt
= fmt
;
409 snd_usb_set_format_quirk(subs
, fmt
);
413 "setting done: format = %d, rate = %d..%d, channels = %d\n",
414 fmt
->format
, fmt
->rate_min
, fmt
->rate_max
, fmt
->channels
);
416 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
417 subs
->datapipe
, subs
->syncpipe
);
426 * allocate a buffer and set the given audio format.
428 * so far we use a physically linear buffer although packetize transfer
429 * doesn't need a continuous area.
430 * if sg buffer is supported on the later version of alsa, we'll follow
433 static int snd_usb_hw_params(struct snd_pcm_substream
*substream
,
434 struct snd_pcm_hw_params
*hw_params
)
436 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
437 struct audioformat
*fmt
;
438 unsigned int channels
, rate
, format
;
441 ret
= snd_pcm_lib_alloc_vmalloc_buffer(substream
,
442 params_buffer_bytes(hw_params
));
446 format
= params_format(hw_params
);
447 rate
= params_rate(hw_params
);
448 channels
= params_channels(hw_params
);
449 fmt
= find_format(subs
, format
, rate
, channels
);
451 snd_printd(KERN_DEBUG
"cannot set format: format = %#x, rate = %d, channels = %d\n",
452 format
, rate
, channels
);
456 changed
= subs
->cur_audiofmt
!= fmt
||
457 subs
->period_bytes
!= params_period_bytes(hw_params
) ||
458 subs
->cur_rate
!= rate
;
459 if ((ret
= set_format(subs
, fmt
)) < 0)
462 if (subs
->cur_rate
!= rate
) {
463 struct usb_host_interface
*alts
;
464 struct usb_interface
*iface
;
465 iface
= usb_ifnum_to_if(subs
->dev
, fmt
->iface
);
466 alts
= &iface
->altsetting
[fmt
->altset_idx
];
467 ret
= snd_usb_init_sample_rate(subs
->stream
->chip
, fmt
->iface
, alts
, fmt
, rate
);
470 subs
->cur_rate
= rate
;
474 mutex_lock(&subs
->stream
->chip
->shutdown_mutex
);
476 stop_endpoints(subs
, 0, 0, 0);
477 ret
= snd_usb_endpoint_set_params(subs
->data_endpoint
, hw_params
, fmt
,
478 subs
->sync_endpoint
);
482 if (subs
->sync_endpoint
)
483 ret
= snd_usb_endpoint_set_params(subs
->sync_endpoint
,
484 hw_params
, fmt
, NULL
);
486 mutex_unlock(&subs
->stream
->chip
->shutdown_mutex
);
490 subs
->interface
= fmt
->iface
;
491 subs
->altset_idx
= fmt
->altset_idx
;
500 * reset the audio format and release the buffer
502 static int snd_usb_hw_free(struct snd_pcm_substream
*substream
)
504 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
506 subs
->cur_audiofmt
= NULL
;
508 subs
->period_bytes
= 0;
509 mutex_lock(&subs
->stream
->chip
->shutdown_mutex
);
510 stop_endpoints(subs
, 0, 1, 1);
511 deactivate_endpoints(subs
);
512 mutex_unlock(&subs
->stream
->chip
->shutdown_mutex
);
513 return snd_pcm_lib_free_vmalloc_buffer(substream
);
519 * only a few subtle things...
521 static int snd_usb_pcm_prepare(struct snd_pcm_substream
*substream
)
523 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
524 struct snd_usb_substream
*subs
= runtime
->private_data
;
526 if (! subs
->cur_audiofmt
) {
527 snd_printk(KERN_ERR
"usbaudio: no format is specified!\n");
531 if (snd_BUG_ON(!subs
->data_endpoint
))
534 /* some unit conversions in runtime */
535 subs
->data_endpoint
->maxframesize
=
536 bytes_to_frames(runtime
, subs
->data_endpoint
->maxpacksize
);
537 subs
->data_endpoint
->curframesize
=
538 bytes_to_frames(runtime
, subs
->data_endpoint
->curpacksize
);
540 /* reset the pointer */
541 subs
->hwptr_done
= 0;
542 subs
->transfer_done
= 0;
543 subs
->last_delay
= 0;
544 subs
->last_frame_number
= 0;
547 /* clear the pending deactivation on the target EPs */
548 deactivate_endpoints(subs
);
550 /* for playback, submit the URBs now; otherwise, the first hwptr_done
551 * updates for all URBs would happen at the same time when starting */
552 if (subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
)
553 return start_endpoints(subs
);
558 static struct snd_pcm_hardware snd_usb_hardware
=
560 .info
= SNDRV_PCM_INFO_MMAP
|
561 SNDRV_PCM_INFO_MMAP_VALID
|
562 SNDRV_PCM_INFO_BATCH
|
563 SNDRV_PCM_INFO_INTERLEAVED
|
564 SNDRV_PCM_INFO_BLOCK_TRANSFER
|
565 SNDRV_PCM_INFO_PAUSE
,
566 .buffer_bytes_max
= 1024 * 1024,
567 .period_bytes_min
= 64,
568 .period_bytes_max
= 512 * 1024,
573 static int hw_check_valid_format(struct snd_usb_substream
*subs
,
574 struct snd_pcm_hw_params
*params
,
575 struct audioformat
*fp
)
577 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
578 struct snd_interval
*ct
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
579 struct snd_mask
*fmts
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
580 struct snd_interval
*pt
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
);
581 struct snd_mask check_fmts
;
584 /* check the format */
585 snd_mask_none(&check_fmts
);
586 check_fmts
.bits
[0] = (u32
)fp
->formats
;
587 check_fmts
.bits
[1] = (u32
)(fp
->formats
>> 32);
588 snd_mask_intersect(&check_fmts
, fmts
);
589 if (snd_mask_empty(&check_fmts
)) {
590 hwc_debug(" > check: no supported format %d\n", fp
->format
);
593 /* check the channels */
594 if (fp
->channels
< ct
->min
|| fp
->channels
> ct
->max
) {
595 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp
->channels
, ct
->min
, ct
->max
);
598 /* check the rate is within the range */
599 if (fp
->rate_min
> it
->max
|| (fp
->rate_min
== it
->max
&& it
->openmax
)) {
600 hwc_debug(" > check: rate_min %d > max %d\n", fp
->rate_min
, it
->max
);
603 if (fp
->rate_max
< it
->min
|| (fp
->rate_max
== it
->min
&& it
->openmin
)) {
604 hwc_debug(" > check: rate_max %d < min %d\n", fp
->rate_max
, it
->min
);
607 /* check whether the period time is >= the data packet interval */
608 if (snd_usb_get_speed(subs
->dev
) != USB_SPEED_FULL
) {
609 ptime
= 125 * (1 << fp
->datainterval
);
610 if (ptime
> pt
->max
|| (ptime
== pt
->max
&& pt
->openmax
)) {
611 hwc_debug(" > check: ptime %u > max %u\n", ptime
, pt
->max
);
618 static int hw_rule_rate(struct snd_pcm_hw_params
*params
,
619 struct snd_pcm_hw_rule
*rule
)
621 struct snd_usb_substream
*subs
= rule
->private;
623 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
624 unsigned int rmin
, rmax
;
627 hwc_debug("hw_rule_rate: (%d,%d)\n", it
->min
, it
->max
);
630 list_for_each(p
, &subs
->fmt_list
) {
631 struct audioformat
*fp
;
632 fp
= list_entry(p
, struct audioformat
, list
);
633 if (!hw_check_valid_format(subs
, params
, fp
))
636 if (rmin
> fp
->rate_min
)
638 if (rmax
< fp
->rate_max
)
647 hwc_debug(" --> get empty\n");
653 if (it
->min
< rmin
) {
658 if (it
->max
> rmax
) {
663 if (snd_interval_checkempty(it
)) {
667 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
672 static int hw_rule_channels(struct snd_pcm_hw_params
*params
,
673 struct snd_pcm_hw_rule
*rule
)
675 struct snd_usb_substream
*subs
= rule
->private;
677 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
678 unsigned int rmin
, rmax
;
681 hwc_debug("hw_rule_channels: (%d,%d)\n", it
->min
, it
->max
);
684 list_for_each(p
, &subs
->fmt_list
) {
685 struct audioformat
*fp
;
686 fp
= list_entry(p
, struct audioformat
, list
);
687 if (!hw_check_valid_format(subs
, params
, fp
))
690 if (rmin
> fp
->channels
)
692 if (rmax
< fp
->channels
)
701 hwc_debug(" --> get empty\n");
707 if (it
->min
< rmin
) {
712 if (it
->max
> rmax
) {
717 if (snd_interval_checkempty(it
)) {
721 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
725 static int hw_rule_format(struct snd_pcm_hw_params
*params
,
726 struct snd_pcm_hw_rule
*rule
)
728 struct snd_usb_substream
*subs
= rule
->private;
730 struct snd_mask
*fmt
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
735 hwc_debug("hw_rule_format: %x:%x\n", fmt
->bits
[0], fmt
->bits
[1]);
737 list_for_each(p
, &subs
->fmt_list
) {
738 struct audioformat
*fp
;
739 fp
= list_entry(p
, struct audioformat
, list
);
740 if (!hw_check_valid_format(subs
, params
, fp
))
742 fbits
|= fp
->formats
;
745 oldbits
[0] = fmt
->bits
[0];
746 oldbits
[1] = fmt
->bits
[1];
747 fmt
->bits
[0] &= (u32
)fbits
;
748 fmt
->bits
[1] &= (u32
)(fbits
>> 32);
749 if (!fmt
->bits
[0] && !fmt
->bits
[1]) {
750 hwc_debug(" --> get empty\n");
753 changed
= (oldbits
[0] != fmt
->bits
[0] || oldbits
[1] != fmt
->bits
[1]);
754 hwc_debug(" --> %x:%x (changed = %d)\n", fmt
->bits
[0], fmt
->bits
[1], changed
);
758 static int hw_rule_period_time(struct snd_pcm_hw_params
*params
,
759 struct snd_pcm_hw_rule
*rule
)
761 struct snd_usb_substream
*subs
= rule
->private;
762 struct audioformat
*fp
;
763 struct snd_interval
*it
;
764 unsigned char min_datainterval
;
768 it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
);
769 hwc_debug("hw_rule_period_time: (%u,%u)\n", it
->min
, it
->max
);
770 min_datainterval
= 0xff;
771 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
772 if (!hw_check_valid_format(subs
, params
, fp
))
774 min_datainterval
= min(min_datainterval
, fp
->datainterval
);
776 if (min_datainterval
== 0xff) {
777 hwc_debug(" --> get empty\n");
781 pmin
= 125 * (1 << min_datainterval
);
783 if (it
->min
< pmin
) {
788 if (snd_interval_checkempty(it
)) {
792 hwc_debug(" --> (%u,%u) (changed = %d)\n", it
->min
, it
->max
, changed
);
797 * If the device supports unusual bit rates, does the request meet these?
799 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime
*runtime
,
800 struct snd_usb_substream
*subs
)
802 struct audioformat
*fp
;
804 int count
= 0, needs_knot
= 0;
807 kfree(subs
->rate_list
.list
);
808 subs
->rate_list
.list
= NULL
;
810 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
811 if (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)
813 count
+= fp
->nr_rates
;
814 if (fp
->rates
& SNDRV_PCM_RATE_KNOT
)
820 subs
->rate_list
.list
= rate_list
=
821 kmalloc(sizeof(int) * count
, GFP_KERNEL
);
822 if (!subs
->rate_list
.list
)
824 subs
->rate_list
.count
= count
;
825 subs
->rate_list
.mask
= 0;
827 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
829 for (i
= 0; i
< fp
->nr_rates
; i
++)
830 rate_list
[count
++] = fp
->rate_table
[i
];
832 err
= snd_pcm_hw_constraint_list(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
842 * set up the runtime hardware information.
845 static int setup_hw_info(struct snd_pcm_runtime
*runtime
, struct snd_usb_substream
*subs
)
848 unsigned int pt
, ptmin
;
849 int param_period_time_if_needed
;
852 runtime
->hw
.formats
= subs
->formats
;
854 runtime
->hw
.rate_min
= 0x7fffffff;
855 runtime
->hw
.rate_max
= 0;
856 runtime
->hw
.channels_min
= 256;
857 runtime
->hw
.channels_max
= 0;
858 runtime
->hw
.rates
= 0;
860 /* check min/max rates and channels */
861 list_for_each(p
, &subs
->fmt_list
) {
862 struct audioformat
*fp
;
863 fp
= list_entry(p
, struct audioformat
, list
);
864 runtime
->hw
.rates
|= fp
->rates
;
865 if (runtime
->hw
.rate_min
> fp
->rate_min
)
866 runtime
->hw
.rate_min
= fp
->rate_min
;
867 if (runtime
->hw
.rate_max
< fp
->rate_max
)
868 runtime
->hw
.rate_max
= fp
->rate_max
;
869 if (runtime
->hw
.channels_min
> fp
->channels
)
870 runtime
->hw
.channels_min
= fp
->channels
;
871 if (runtime
->hw
.channels_max
< fp
->channels
)
872 runtime
->hw
.channels_max
= fp
->channels
;
873 if (fp
->fmt_type
== UAC_FORMAT_TYPE_II
&& fp
->frame_size
> 0) {
874 /* FIXME: there might be more than one audio formats... */
875 runtime
->hw
.period_bytes_min
= runtime
->hw
.period_bytes_max
=
878 pt
= 125 * (1 << fp
->datainterval
);
879 ptmin
= min(ptmin
, pt
);
881 err
= snd_usb_autoresume(subs
->stream
->chip
);
885 param_period_time_if_needed
= SNDRV_PCM_HW_PARAM_PERIOD_TIME
;
886 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
887 /* full speed devices have fixed data packet interval */
890 /* if period time doesn't go below 1 ms, no rules needed */
891 param_period_time_if_needed
= -1;
892 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
895 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
897 SNDRV_PCM_HW_PARAM_FORMAT
,
898 SNDRV_PCM_HW_PARAM_CHANNELS
,
899 param_period_time_if_needed
,
902 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
903 hw_rule_channels
, subs
,
904 SNDRV_PCM_HW_PARAM_FORMAT
,
905 SNDRV_PCM_HW_PARAM_RATE
,
906 param_period_time_if_needed
,
909 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
910 hw_rule_format
, subs
,
911 SNDRV_PCM_HW_PARAM_RATE
,
912 SNDRV_PCM_HW_PARAM_CHANNELS
,
913 param_period_time_if_needed
,
916 if (param_period_time_if_needed
>= 0) {
917 err
= snd_pcm_hw_rule_add(runtime
, 0,
918 SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
919 hw_rule_period_time
, subs
,
920 SNDRV_PCM_HW_PARAM_FORMAT
,
921 SNDRV_PCM_HW_PARAM_CHANNELS
,
922 SNDRV_PCM_HW_PARAM_RATE
,
927 if ((err
= snd_usb_pcm_check_knot(runtime
, subs
)) < 0)
932 snd_usb_autosuspend(subs
->stream
->chip
);
936 static int snd_usb_pcm_open(struct snd_pcm_substream
*substream
, int direction
)
938 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
939 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
940 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
942 subs
->interface
= -1;
943 subs
->altset_idx
= 0;
944 runtime
->hw
= snd_usb_hardware
;
945 runtime
->private_data
= subs
;
946 subs
->pcm_substream
= substream
;
947 /* runtime PM is also done there */
948 return setup_hw_info(runtime
, subs
);
951 static int snd_usb_pcm_close(struct snd_pcm_substream
*substream
, int direction
)
953 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
954 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
956 stop_endpoints(subs
, 0, 0, 0);
958 if (!as
->chip
->shutdown
&& subs
->interface
>= 0) {
959 usb_set_interface(subs
->dev
, subs
->interface
, 0);
960 subs
->interface
= -1;
963 subs
->pcm_substream
= NULL
;
964 snd_usb_autosuspend(subs
->stream
->chip
);
969 /* Since a URB can handle only a single linear buffer, we must use double
970 * buffering when the data to be transferred overflows the buffer boundary.
971 * To avoid inconsistencies when updating hwptr_done, we use double buffering
974 static void retire_capture_urb(struct snd_usb_substream
*subs
,
977 struct snd_pcm_runtime
*runtime
= subs
->pcm_substream
->runtime
;
978 unsigned int stride
, frames
, bytes
, oldptr
;
979 int i
, period_elapsed
= 0;
983 stride
= runtime
->frame_bits
>> 3;
985 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
986 cp
= (unsigned char *)urb
->transfer_buffer
+ urb
->iso_frame_desc
[i
].offset
;
987 if (urb
->iso_frame_desc
[i
].status
&& printk_ratelimit()) {
988 snd_printdd(KERN_ERR
"frame %d active: %d\n", i
, urb
->iso_frame_desc
[i
].status
);
991 bytes
= urb
->iso_frame_desc
[i
].actual_length
;
992 frames
= bytes
/ stride
;
993 if (!subs
->txfr_quirk
)
994 bytes
= frames
* stride
;
995 if (bytes
% (runtime
->sample_bits
>> 3) != 0) {
996 #ifdef CONFIG_SND_DEBUG_VERBOSE
997 int oldbytes
= bytes
;
999 bytes
= frames
* stride
;
1000 snd_printdd(KERN_ERR
"Corrected urb data len. %d->%d\n",
1003 /* update the current pointer */
1004 spin_lock_irqsave(&subs
->lock
, flags
);
1005 oldptr
= subs
->hwptr_done
;
1006 subs
->hwptr_done
+= bytes
;
1007 if (subs
->hwptr_done
>= runtime
->buffer_size
* stride
)
1008 subs
->hwptr_done
-= runtime
->buffer_size
* stride
;
1009 frames
= (bytes
+ (oldptr
% stride
)) / stride
;
1010 subs
->transfer_done
+= frames
;
1011 if (subs
->transfer_done
>= runtime
->period_size
) {
1012 subs
->transfer_done
-= runtime
->period_size
;
1015 spin_unlock_irqrestore(&subs
->lock
, flags
);
1016 /* copy a data chunk */
1017 if (oldptr
+ bytes
> runtime
->buffer_size
* stride
) {
1018 unsigned int bytes1
=
1019 runtime
->buffer_size
* stride
- oldptr
;
1020 memcpy(runtime
->dma_area
+ oldptr
, cp
, bytes1
);
1021 memcpy(runtime
->dma_area
, cp
+ bytes1
, bytes
- bytes1
);
1023 memcpy(runtime
->dma_area
+ oldptr
, cp
, bytes
);
1028 snd_pcm_period_elapsed(subs
->pcm_substream
);
1031 static void prepare_playback_urb(struct snd_usb_substream
*subs
,
1034 struct snd_pcm_runtime
*runtime
= subs
->pcm_substream
->runtime
;
1035 struct snd_urb_ctx
*ctx
= urb
->context
;
1036 unsigned int counts
, frames
, bytes
;
1037 int i
, stride
, period_elapsed
= 0;
1038 unsigned long flags
;
1040 stride
= runtime
->frame_bits
>> 3;
1043 urb
->number_of_packets
= 0;
1044 spin_lock_irqsave(&subs
->lock
, flags
);
1045 for (i
= 0; i
< ctx
->packets
; i
++) {
1046 counts
= ctx
->packet_size
[i
];
1047 /* set up descriptor */
1048 urb
->iso_frame_desc
[i
].offset
= frames
* stride
;
1049 urb
->iso_frame_desc
[i
].length
= counts
* stride
;
1051 urb
->number_of_packets
++;
1052 subs
->transfer_done
+= counts
;
1053 if (subs
->transfer_done
>= runtime
->period_size
) {
1054 subs
->transfer_done
-= runtime
->period_size
;
1056 if (subs
->fmt_type
== UAC_FORMAT_TYPE_II
) {
1057 if (subs
->transfer_done
> 0) {
1058 /* FIXME: fill-max mode is not
1060 frames
-= subs
->transfer_done
;
1061 counts
-= subs
->transfer_done
;
1062 urb
->iso_frame_desc
[i
].length
=
1064 subs
->transfer_done
= 0;
1067 if (i
< ctx
->packets
) {
1068 /* add a transfer delimiter */
1069 urb
->iso_frame_desc
[i
].offset
=
1071 urb
->iso_frame_desc
[i
].length
= 0;
1072 urb
->number_of_packets
++;
1077 if (period_elapsed
&&
1078 !snd_usb_endpoint_implict_feedback_sink(subs
->data_endpoint
)) /* finish at the period boundary */
1081 bytes
= frames
* stride
;
1082 if (subs
->hwptr_done
+ bytes
> runtime
->buffer_size
* stride
) {
1083 /* err, the transferred area goes over buffer boundary. */
1084 unsigned int bytes1
=
1085 runtime
->buffer_size
* stride
- subs
->hwptr_done
;
1086 memcpy(urb
->transfer_buffer
,
1087 runtime
->dma_area
+ subs
->hwptr_done
, bytes1
);
1088 memcpy(urb
->transfer_buffer
+ bytes1
,
1089 runtime
->dma_area
, bytes
- bytes1
);
1091 memcpy(urb
->transfer_buffer
,
1092 runtime
->dma_area
+ subs
->hwptr_done
, bytes
);
1094 subs
->hwptr_done
+= bytes
;
1095 if (subs
->hwptr_done
>= runtime
->buffer_size
* stride
)
1096 subs
->hwptr_done
-= runtime
->buffer_size
* stride
;
1097 runtime
->delay
+= frames
;
1098 spin_unlock_irqrestore(&subs
->lock
, flags
);
1099 urb
->transfer_buffer_length
= bytes
;
1101 snd_pcm_period_elapsed(subs
->pcm_substream
);
1105 * process after playback data complete
1106 * - decrease the delay count again
1108 static void retire_playback_urb(struct snd_usb_substream
*subs
,
1111 unsigned long flags
;
1112 struct snd_pcm_runtime
*runtime
= subs
->pcm_substream
->runtime
;
1113 int stride
= runtime
->frame_bits
>> 3;
1114 int processed
= urb
->transfer_buffer_length
/ stride
;
1116 spin_lock_irqsave(&subs
->lock
, flags
);
1117 if (processed
> runtime
->delay
)
1120 runtime
->delay
-= processed
;
1121 spin_unlock_irqrestore(&subs
->lock
, flags
);
1124 static int snd_usb_playback_open(struct snd_pcm_substream
*substream
)
1126 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
1129 static int snd_usb_playback_close(struct snd_pcm_substream
*substream
)
1131 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
1134 static int snd_usb_capture_open(struct snd_pcm_substream
*substream
)
1136 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_CAPTURE
);
1139 static int snd_usb_capture_close(struct snd_pcm_substream
*substream
)
1141 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_CAPTURE
);
1144 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream
*substream
,
1147 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
1150 case SNDRV_PCM_TRIGGER_START
:
1151 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1152 subs
->data_endpoint
->prepare_data_urb
= prepare_playback_urb
;
1153 subs
->data_endpoint
->retire_data_urb
= retire_playback_urb
;
1156 case SNDRV_PCM_TRIGGER_STOP
:
1157 stop_endpoints(subs
, 0, 0, 0);
1160 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1161 subs
->data_endpoint
->prepare_data_urb
= NULL
;
1162 subs
->data_endpoint
->retire_data_urb
= NULL
;
1170 static int snd_usb_substream_capture_trigger(struct snd_pcm_substream
*substream
,
1174 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
1177 case SNDRV_PCM_TRIGGER_START
:
1178 err
= start_endpoints(subs
);
1182 subs
->data_endpoint
->retire_data_urb
= retire_capture_urb
;
1185 case SNDRV_PCM_TRIGGER_STOP
:
1186 stop_endpoints(subs
, 0, 0, 0);
1189 case SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1190 subs
->data_endpoint
->retire_data_urb
= NULL
;
1193 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1194 subs
->data_endpoint
->retire_data_urb
= retire_capture_urb
;
1202 static struct snd_pcm_ops snd_usb_playback_ops
= {
1203 .open
= snd_usb_playback_open
,
1204 .close
= snd_usb_playback_close
,
1205 .ioctl
= snd_pcm_lib_ioctl
,
1206 .hw_params
= snd_usb_hw_params
,
1207 .hw_free
= snd_usb_hw_free
,
1208 .prepare
= snd_usb_pcm_prepare
,
1209 .trigger
= snd_usb_substream_playback_trigger
,
1210 .pointer
= snd_usb_pcm_pointer
,
1211 .page
= snd_pcm_lib_get_vmalloc_page
,
1212 .mmap
= snd_pcm_lib_mmap_vmalloc
,
1215 static struct snd_pcm_ops snd_usb_capture_ops
= {
1216 .open
= snd_usb_capture_open
,
1217 .close
= snd_usb_capture_close
,
1218 .ioctl
= snd_pcm_lib_ioctl
,
1219 .hw_params
= snd_usb_hw_params
,
1220 .hw_free
= snd_usb_hw_free
,
1221 .prepare
= snd_usb_pcm_prepare
,
1222 .trigger
= snd_usb_substream_capture_trigger
,
1223 .pointer
= snd_usb_pcm_pointer
,
1224 .page
= snd_pcm_lib_get_vmalloc_page
,
1225 .mmap
= snd_pcm_lib_mmap_vmalloc
,
1228 void snd_usb_set_pcm_ops(struct snd_pcm
*pcm
, int stream
)
1230 snd_pcm_set_ops(pcm
, stream
,
1231 stream
== SNDRV_PCM_STREAM_PLAYBACK
?
1232 &snd_usb_playback_ops
: &snd_usb_capture_ops
);