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/usb.h>
19 #include <linux/usb/audio.h>
20 #include <linux/usb/audio-v2.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
35 * return the current pcm pointer. just based on the hwptr_done value.
37 static snd_pcm_uframes_t
snd_usb_pcm_pointer(struct snd_pcm_substream
*substream
)
39 struct snd_usb_substream
*subs
;
40 unsigned int hwptr_done
;
42 subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
43 spin_lock(&subs
->lock
);
44 hwptr_done
= subs
->hwptr_done
;
45 spin_unlock(&subs
->lock
);
46 return hwptr_done
/ (substream
->runtime
->frame_bits
>> 3);
50 * find a matching audio format
52 static struct audioformat
*find_format(struct snd_usb_substream
*subs
, unsigned int format
,
53 unsigned int rate
, unsigned int channels
)
56 struct audioformat
*found
= NULL
;
57 int cur_attr
= 0, attr
;
59 list_for_each(p
, &subs
->fmt_list
) {
60 struct audioformat
*fp
;
61 fp
= list_entry(p
, struct audioformat
, list
);
62 if (!(fp
->formats
& (1uLL << format
)))
64 if (fp
->channels
!= channels
)
66 if (rate
< fp
->rate_min
|| rate
> fp
->rate_max
)
68 if (! (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)) {
70 for (i
= 0; i
< fp
->nr_rates
; i
++)
71 if (fp
->rate_table
[i
] == rate
)
73 if (i
>= fp
->nr_rates
)
76 attr
= fp
->ep_attr
& USB_ENDPOINT_SYNCTYPE
;
82 /* avoid async out and adaptive in if the other method
83 * supports the same format.
84 * this is a workaround for the case like
85 * M-audio audiophile USB.
87 if (attr
!= cur_attr
) {
88 if ((attr
== USB_ENDPOINT_SYNC_ASYNC
&&
89 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
90 (attr
== USB_ENDPOINT_SYNC_ADAPTIVE
&&
91 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
))
93 if ((cur_attr
== USB_ENDPOINT_SYNC_ASYNC
&&
94 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
95 (cur_attr
== USB_ENDPOINT_SYNC_ADAPTIVE
&&
96 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
)) {
102 /* find the format with the largest max. packet size */
103 if (fp
->maxpacksize
> found
->maxpacksize
) {
111 static int init_pitch_v1(struct snd_usb_audio
*chip
, int iface
,
112 struct usb_host_interface
*alts
,
113 struct audioformat
*fmt
)
115 struct usb_device
*dev
= chip
->dev
;
117 unsigned char data
[1];
120 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
122 /* if endpoint doesn't have pitch control, bail out */
123 if (!(fmt
->attributes
& UAC_EP_CS_ATTR_PITCH_CONTROL
))
127 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), UAC_SET_CUR
,
128 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
129 UAC_EP_CS_ATTR_PITCH_CONTROL
<< 8, ep
,
130 data
, sizeof(data
), 1000)) < 0) {
131 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH\n",
132 dev
->devnum
, iface
, ep
);
140 * initialize the picth control and sample rate
142 int snd_usb_init_pitch(struct snd_usb_audio
*chip
, int iface
,
143 struct usb_host_interface
*alts
,
144 struct audioformat
*fmt
)
146 struct usb_interface_descriptor
*altsd
= get_iface_desc(alts
);
148 switch (altsd
->bInterfaceProtocol
) {
150 return init_pitch_v1(chip
, iface
, alts
, fmt
);
153 /* not implemented yet */
160 static int set_sample_rate_v1(struct snd_usb_audio
*chip
, int iface
,
161 struct usb_host_interface
*alts
,
162 struct audioformat
*fmt
, int rate
)
164 struct usb_device
*dev
= chip
->dev
;
166 unsigned char data
[3];
169 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
170 /* if endpoint doesn't have sampling rate control, bail out */
171 if (!(fmt
->attributes
& UAC_EP_CS_ATTR_SAMPLE_RATE
)) {
172 snd_printk(KERN_WARNING
"%d:%d:%d: endpoint lacks sample rate attribute bit, cannot set.\n",
173 dev
->devnum
, iface
, fmt
->altsetting
);
179 data
[2] = rate
>> 16;
180 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), UAC_SET_CUR
,
181 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
182 UAC_EP_CS_ATTR_SAMPLE_RATE
<< 8, ep
,
183 data
, sizeof(data
), 1000)) < 0) {
184 snd_printk(KERN_ERR
"%d:%d:%d: cannot set freq %d to ep %#x\n",
185 dev
->devnum
, iface
, fmt
->altsetting
, rate
, ep
);
188 if ((err
= snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), UAC_GET_CUR
,
189 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_IN
,
190 UAC_EP_CS_ATTR_SAMPLE_RATE
<< 8, ep
,
191 data
, sizeof(data
), 1000)) < 0) {
192 snd_printk(KERN_WARNING
"%d:%d:%d: cannot get freq at ep %#x\n",
193 dev
->devnum
, iface
, fmt
->altsetting
, ep
);
194 return 0; /* some devices don't support reading */
196 crate
= data
[0] | (data
[1] << 8) | (data
[2] << 16);
198 snd_printd(KERN_WARNING
"current rate %d is different from the runtime rate %d\n", crate
, rate
);
199 // runtime->rate = crate;
205 static int set_sample_rate_v2(struct snd_usb_audio
*chip
, int iface
,
206 struct usb_host_interface
*alts
,
207 struct audioformat
*fmt
, int rate
)
209 struct usb_device
*dev
= chip
->dev
;
210 unsigned char data
[4];
215 data
[2] = rate
>> 16;
216 data
[3] = rate
>> 24;
217 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), UAC2_CS_CUR
,
218 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_OUT
,
219 UAC2_CS_CONTROL_SAM_FREQ
<< 8, chip
->clock_id
<< 8,
220 data
, sizeof(data
), 1000)) < 0) {
221 snd_printk(KERN_ERR
"%d:%d:%d: cannot set freq %d (v2)\n",
222 dev
->devnum
, iface
, fmt
->altsetting
, rate
);
225 if ((err
= snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), UAC2_CS_CUR
,
226 USB_TYPE_CLASS
| USB_RECIP_INTERFACE
| USB_DIR_IN
,
227 UAC2_CS_CONTROL_SAM_FREQ
<< 8, chip
->clock_id
<< 8,
228 data
, sizeof(data
), 1000)) < 0) {
229 snd_printk(KERN_WARNING
"%d:%d:%d: cannot get freq (v2)\n",
230 dev
->devnum
, iface
, fmt
->altsetting
);
233 crate
= data
[0] | (data
[1] << 8) | (data
[2] << 16) | (data
[3] << 24);
235 snd_printd(KERN_WARNING
"current rate %d is different from the runtime rate %d\n", crate
, rate
);
240 int snd_usb_init_sample_rate(struct snd_usb_audio
*chip
, int iface
,
241 struct usb_host_interface
*alts
,
242 struct audioformat
*fmt
, int rate
)
244 struct usb_interface_descriptor
*altsd
= get_iface_desc(alts
);
246 switch (altsd
->bInterfaceProtocol
) {
248 return set_sample_rate_v1(chip
, iface
, alts
, fmt
, rate
);
251 return set_sample_rate_v2(chip
, iface
, alts
, fmt
, rate
);
258 * find a matching format and set up the interface
260 static int set_format(struct snd_usb_substream
*subs
, struct audioformat
*fmt
)
262 struct usb_device
*dev
= subs
->dev
;
263 struct usb_host_interface
*alts
;
264 struct usb_interface_descriptor
*altsd
;
265 struct usb_interface
*iface
;
266 unsigned int ep
, attr
;
267 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
270 iface
= usb_ifnum_to_if(dev
, fmt
->iface
);
273 alts
= &iface
->altsetting
[fmt
->altset_idx
];
274 altsd
= get_iface_desc(alts
);
275 if (WARN_ON(altsd
->bAlternateSetting
!= fmt
->altsetting
))
278 if (fmt
== subs
->cur_audiofmt
)
281 /* close the old interface */
282 if (subs
->interface
>= 0 && subs
->interface
!= fmt
->iface
) {
283 if (usb_set_interface(subs
->dev
, subs
->interface
, 0) < 0) {
284 snd_printk(KERN_ERR
"%d:%d:%d: return to setting 0 failed\n",
285 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
288 subs
->interface
= -1;
289 subs
->altset_idx
= 0;
293 if (subs
->interface
!= fmt
->iface
|| subs
->altset_idx
!= fmt
->altset_idx
) {
294 if (usb_set_interface(dev
, fmt
->iface
, fmt
->altsetting
) < 0) {
295 snd_printk(KERN_ERR
"%d:%d:%d: usb_set_interface failed\n",
296 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
299 snd_printdd(KERN_INFO
"setting usb interface %d:%d\n", fmt
->iface
, fmt
->altsetting
);
300 subs
->interface
= fmt
->iface
;
301 subs
->altset_idx
= fmt
->altset_idx
;
304 /* create a data pipe */
305 ep
= fmt
->endpoint
& USB_ENDPOINT_NUMBER_MASK
;
307 subs
->datapipe
= usb_sndisocpipe(dev
, ep
);
309 subs
->datapipe
= usb_rcvisocpipe(dev
, ep
);
310 subs
->datainterval
= fmt
->datainterval
;
311 subs
->syncpipe
= subs
->syncinterval
= 0;
312 subs
->maxpacksize
= fmt
->maxpacksize
;
315 /* we need a sync pipe in async OUT or adaptive IN mode */
316 /* check the number of EP, since some devices have broken
317 * descriptors which fool us. if it has only one EP,
318 * assume it as adaptive-out or sync-in.
320 attr
= fmt
->ep_attr
& USB_ENDPOINT_SYNCTYPE
;
321 if (((is_playback
&& attr
== USB_ENDPOINT_SYNC_ASYNC
) ||
322 (! is_playback
&& attr
== USB_ENDPOINT_SYNC_ADAPTIVE
)) &&
323 altsd
->bNumEndpoints
>= 2) {
324 /* check sync-pipe endpoint */
325 /* ... and check descriptor size before accessing bSynchAddress
326 because there is a version of the SB Audigy 2 NX firmware lacking
327 the audio fields in the endpoint descriptors */
328 if ((get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) != 0x01 ||
329 (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
330 get_endpoint(alts
, 1)->bSynchAddress
!= 0)) {
331 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
332 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
335 ep
= get_endpoint(alts
, 1)->bEndpointAddress
;
336 if (get_endpoint(alts
, 0)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
337 (( is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
| USB_DIR_IN
)) ||
338 (!is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
& ~USB_DIR_IN
)))) {
339 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
340 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
343 ep
&= USB_ENDPOINT_NUMBER_MASK
;
345 subs
->syncpipe
= usb_rcvisocpipe(dev
, ep
);
347 subs
->syncpipe
= usb_sndisocpipe(dev
, ep
);
348 if (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
349 get_endpoint(alts
, 1)->bRefresh
>= 1 &&
350 get_endpoint(alts
, 1)->bRefresh
<= 9)
351 subs
->syncinterval
= get_endpoint(alts
, 1)->bRefresh
;
352 else if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
353 subs
->syncinterval
= 1;
354 else if (get_endpoint(alts
, 1)->bInterval
>= 1 &&
355 get_endpoint(alts
, 1)->bInterval
<= 16)
356 subs
->syncinterval
= get_endpoint(alts
, 1)->bInterval
- 1;
358 subs
->syncinterval
= 3;
361 /* always fill max packet size */
362 if (fmt
->attributes
& UAC_EP_CS_ATTR_FILL_MAX
)
365 if ((err
= snd_usb_init_pitch(subs
->stream
->chip
, subs
->interface
, alts
, fmt
)) < 0)
368 subs
->cur_audiofmt
= fmt
;
370 snd_usb_set_format_quirk(subs
, fmt
);
374 "setting done: format = %d, rate = %d..%d, channels = %d\n",
375 fmt
->format
, fmt
->rate_min
, fmt
->rate_max
, fmt
->channels
);
377 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
378 subs
->datapipe
, subs
->syncpipe
);
387 * allocate a buffer and set the given audio format.
389 * so far we use a physically linear buffer although packetize transfer
390 * doesn't need a continuous area.
391 * if sg buffer is supported on the later version of alsa, we'll follow
394 static int snd_usb_hw_params(struct snd_pcm_substream
*substream
,
395 struct snd_pcm_hw_params
*hw_params
)
397 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
398 struct audioformat
*fmt
;
399 unsigned int channels
, rate
, format
;
402 ret
= snd_pcm_lib_alloc_vmalloc_buffer(substream
,
403 params_buffer_bytes(hw_params
));
407 format
= params_format(hw_params
);
408 rate
= params_rate(hw_params
);
409 channels
= params_channels(hw_params
);
410 fmt
= find_format(subs
, format
, rate
, channels
);
412 snd_printd(KERN_DEBUG
"cannot set format: format = %#x, rate = %d, channels = %d\n",
413 format
, rate
, channels
);
417 changed
= subs
->cur_audiofmt
!= fmt
||
418 subs
->period_bytes
!= params_period_bytes(hw_params
) ||
419 subs
->cur_rate
!= rate
;
420 if ((ret
= set_format(subs
, fmt
)) < 0)
423 if (subs
->cur_rate
!= rate
) {
424 struct usb_host_interface
*alts
;
425 struct usb_interface
*iface
;
426 iface
= usb_ifnum_to_if(subs
->dev
, fmt
->iface
);
427 alts
= &iface
->altsetting
[fmt
->altset_idx
];
428 ret
= snd_usb_init_sample_rate(subs
->stream
->chip
, subs
->interface
, alts
, fmt
, rate
);
431 subs
->cur_rate
= rate
;
436 snd_usb_release_substream_urbs(subs
, 0);
437 /* influenced: period_bytes, channels, rate, format, */
438 ret
= snd_usb_init_substream_urbs(subs
, params_period_bytes(hw_params
),
439 params_rate(hw_params
),
440 snd_pcm_format_physical_width(params_format(hw_params
)) *
441 params_channels(hw_params
));
450 * reset the audio format and release the buffer
452 static int snd_usb_hw_free(struct snd_pcm_substream
*substream
)
454 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
456 subs
->cur_audiofmt
= NULL
;
458 subs
->period_bytes
= 0;
459 if (!subs
->stream
->chip
->shutdown
)
460 snd_usb_release_substream_urbs(subs
, 0);
461 return snd_pcm_lib_free_vmalloc_buffer(substream
);
467 * only a few subtle things...
469 static int snd_usb_pcm_prepare(struct snd_pcm_substream
*substream
)
471 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
472 struct snd_usb_substream
*subs
= runtime
->private_data
;
474 if (! subs
->cur_audiofmt
) {
475 snd_printk(KERN_ERR
"usbaudio: no format is specified!\n");
479 /* some unit conversions in runtime */
480 subs
->maxframesize
= bytes_to_frames(runtime
, subs
->maxpacksize
);
481 subs
->curframesize
= bytes_to_frames(runtime
, subs
->curpacksize
);
483 /* reset the pointer */
484 subs
->hwptr_done
= 0;
485 subs
->transfer_done
= 0;
489 return snd_usb_substream_prepare(subs
, runtime
);
492 static struct snd_pcm_hardware snd_usb_hardware
=
494 .info
= SNDRV_PCM_INFO_MMAP
|
495 SNDRV_PCM_INFO_MMAP_VALID
|
496 SNDRV_PCM_INFO_BATCH
|
497 SNDRV_PCM_INFO_INTERLEAVED
|
498 SNDRV_PCM_INFO_BLOCK_TRANSFER
|
499 SNDRV_PCM_INFO_PAUSE
,
500 .buffer_bytes_max
= 1024 * 1024,
501 .period_bytes_min
= 64,
502 .period_bytes_max
= 512 * 1024,
507 static int hw_check_valid_format(struct snd_usb_substream
*subs
,
508 struct snd_pcm_hw_params
*params
,
509 struct audioformat
*fp
)
511 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
512 struct snd_interval
*ct
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
513 struct snd_mask
*fmts
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
514 struct snd_interval
*pt
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
);
515 struct snd_mask check_fmts
;
518 /* check the format */
519 snd_mask_none(&check_fmts
);
520 check_fmts
.bits
[0] = (u32
)fp
->formats
;
521 check_fmts
.bits
[1] = (u32
)(fp
->formats
>> 32);
522 snd_mask_intersect(&check_fmts
, fmts
);
523 if (snd_mask_empty(&check_fmts
)) {
524 hwc_debug(" > check: no supported format %d\n", fp
->format
);
527 /* check the channels */
528 if (fp
->channels
< ct
->min
|| fp
->channels
> ct
->max
) {
529 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp
->channels
, ct
->min
, ct
->max
);
532 /* check the rate is within the range */
533 if (fp
->rate_min
> it
->max
|| (fp
->rate_min
== it
->max
&& it
->openmax
)) {
534 hwc_debug(" > check: rate_min %d > max %d\n", fp
->rate_min
, it
->max
);
537 if (fp
->rate_max
< it
->min
|| (fp
->rate_max
== it
->min
&& it
->openmin
)) {
538 hwc_debug(" > check: rate_max %d < min %d\n", fp
->rate_max
, it
->min
);
541 /* check whether the period time is >= the data packet interval */
542 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
) {
543 ptime
= 125 * (1 << fp
->datainterval
);
544 if (ptime
> pt
->max
|| (ptime
== pt
->max
&& pt
->openmax
)) {
545 hwc_debug(" > check: ptime %u > max %u\n", ptime
, pt
->max
);
552 static int hw_rule_rate(struct snd_pcm_hw_params
*params
,
553 struct snd_pcm_hw_rule
*rule
)
555 struct snd_usb_substream
*subs
= rule
->private;
557 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
558 unsigned int rmin
, rmax
;
561 hwc_debug("hw_rule_rate: (%d,%d)\n", it
->min
, it
->max
);
564 list_for_each(p
, &subs
->fmt_list
) {
565 struct audioformat
*fp
;
566 fp
= list_entry(p
, struct audioformat
, list
);
567 if (!hw_check_valid_format(subs
, params
, fp
))
570 if (rmin
> fp
->rate_min
)
572 if (rmax
< fp
->rate_max
)
581 hwc_debug(" --> get empty\n");
587 if (it
->min
< rmin
) {
592 if (it
->max
> rmax
) {
597 if (snd_interval_checkempty(it
)) {
601 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
606 static int hw_rule_channels(struct snd_pcm_hw_params
*params
,
607 struct snd_pcm_hw_rule
*rule
)
609 struct snd_usb_substream
*subs
= rule
->private;
611 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
612 unsigned int rmin
, rmax
;
615 hwc_debug("hw_rule_channels: (%d,%d)\n", it
->min
, it
->max
);
618 list_for_each(p
, &subs
->fmt_list
) {
619 struct audioformat
*fp
;
620 fp
= list_entry(p
, struct audioformat
, list
);
621 if (!hw_check_valid_format(subs
, params
, fp
))
624 if (rmin
> fp
->channels
)
626 if (rmax
< fp
->channels
)
635 hwc_debug(" --> get empty\n");
641 if (it
->min
< rmin
) {
646 if (it
->max
> rmax
) {
651 if (snd_interval_checkempty(it
)) {
655 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
659 static int hw_rule_format(struct snd_pcm_hw_params
*params
,
660 struct snd_pcm_hw_rule
*rule
)
662 struct snd_usb_substream
*subs
= rule
->private;
664 struct snd_mask
*fmt
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
669 hwc_debug("hw_rule_format: %x:%x\n", fmt
->bits
[0], fmt
->bits
[1]);
671 list_for_each(p
, &subs
->fmt_list
) {
672 struct audioformat
*fp
;
673 fp
= list_entry(p
, struct audioformat
, list
);
674 if (!hw_check_valid_format(subs
, params
, fp
))
676 fbits
|= fp
->formats
;
679 oldbits
[0] = fmt
->bits
[0];
680 oldbits
[1] = fmt
->bits
[1];
681 fmt
->bits
[0] &= (u32
)fbits
;
682 fmt
->bits
[1] &= (u32
)(fbits
>> 32);
683 if (!fmt
->bits
[0] && !fmt
->bits
[1]) {
684 hwc_debug(" --> get empty\n");
687 changed
= (oldbits
[0] != fmt
->bits
[0] || oldbits
[1] != fmt
->bits
[1]);
688 hwc_debug(" --> %x:%x (changed = %d)\n", fmt
->bits
[0], fmt
->bits
[1], changed
);
692 static int hw_rule_period_time(struct snd_pcm_hw_params
*params
,
693 struct snd_pcm_hw_rule
*rule
)
695 struct snd_usb_substream
*subs
= rule
->private;
696 struct audioformat
*fp
;
697 struct snd_interval
*it
;
698 unsigned char min_datainterval
;
702 it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
);
703 hwc_debug("hw_rule_period_time: (%u,%u)\n", it
->min
, it
->max
);
704 min_datainterval
= 0xff;
705 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
706 if (!hw_check_valid_format(subs
, params
, fp
))
708 min_datainterval
= min(min_datainterval
, fp
->datainterval
);
710 if (min_datainterval
== 0xff) {
711 hwc_debug(" --> get emtpy\n");
715 pmin
= 125 * (1 << min_datainterval
);
717 if (it
->min
< pmin
) {
722 if (snd_interval_checkempty(it
)) {
726 hwc_debug(" --> (%u,%u) (changed = %d)\n", it
->min
, it
->max
, changed
);
731 * If the device supports unusual bit rates, does the request meet these?
733 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime
*runtime
,
734 struct snd_usb_substream
*subs
)
736 struct audioformat
*fp
;
737 int count
= 0, needs_knot
= 0;
740 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
741 if (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)
743 count
+= fp
->nr_rates
;
744 if (fp
->rates
& SNDRV_PCM_RATE_KNOT
)
750 subs
->rate_list
.count
= count
;
751 subs
->rate_list
.list
= kmalloc(sizeof(int) * count
, GFP_KERNEL
);
752 subs
->rate_list
.mask
= 0;
754 list_for_each_entry(fp
, &subs
->fmt_list
, list
) {
756 for (i
= 0; i
< fp
->nr_rates
; i
++)
757 subs
->rate_list
.list
[count
++] = fp
->rate_table
[i
];
759 err
= snd_pcm_hw_constraint_list(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
769 * set up the runtime hardware information.
772 static int setup_hw_info(struct snd_pcm_runtime
*runtime
, struct snd_usb_substream
*subs
)
775 unsigned int pt
, ptmin
;
776 int param_period_time_if_needed
;
779 runtime
->hw
.formats
= subs
->formats
;
781 runtime
->hw
.rate_min
= 0x7fffffff;
782 runtime
->hw
.rate_max
= 0;
783 runtime
->hw
.channels_min
= 256;
784 runtime
->hw
.channels_max
= 0;
785 runtime
->hw
.rates
= 0;
787 /* check min/max rates and channels */
788 list_for_each(p
, &subs
->fmt_list
) {
789 struct audioformat
*fp
;
790 fp
= list_entry(p
, struct audioformat
, list
);
791 runtime
->hw
.rates
|= fp
->rates
;
792 if (runtime
->hw
.rate_min
> fp
->rate_min
)
793 runtime
->hw
.rate_min
= fp
->rate_min
;
794 if (runtime
->hw
.rate_max
< fp
->rate_max
)
795 runtime
->hw
.rate_max
= fp
->rate_max
;
796 if (runtime
->hw
.channels_min
> fp
->channels
)
797 runtime
->hw
.channels_min
= fp
->channels
;
798 if (runtime
->hw
.channels_max
< fp
->channels
)
799 runtime
->hw
.channels_max
= fp
->channels
;
800 if (fp
->fmt_type
== UAC_FORMAT_TYPE_II
&& fp
->frame_size
> 0) {
801 /* FIXME: there might be more than one audio formats... */
802 runtime
->hw
.period_bytes_min
= runtime
->hw
.period_bytes_max
=
805 pt
= 125 * (1 << fp
->datainterval
);
806 ptmin
= min(ptmin
, pt
);
809 param_period_time_if_needed
= SNDRV_PCM_HW_PARAM_PERIOD_TIME
;
810 if (snd_usb_get_speed(subs
->dev
) != USB_SPEED_HIGH
)
811 /* full speed devices have fixed data packet interval */
814 /* if period time doesn't go below 1 ms, no rules needed */
815 param_period_time_if_needed
= -1;
816 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
819 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
821 SNDRV_PCM_HW_PARAM_FORMAT
,
822 SNDRV_PCM_HW_PARAM_CHANNELS
,
823 param_period_time_if_needed
,
826 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
827 hw_rule_channels
, subs
,
828 SNDRV_PCM_HW_PARAM_FORMAT
,
829 SNDRV_PCM_HW_PARAM_RATE
,
830 param_period_time_if_needed
,
833 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
834 hw_rule_format
, subs
,
835 SNDRV_PCM_HW_PARAM_RATE
,
836 SNDRV_PCM_HW_PARAM_CHANNELS
,
837 param_period_time_if_needed
,
840 if (param_period_time_if_needed
>= 0) {
841 err
= snd_pcm_hw_rule_add(runtime
, 0,
842 SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
843 hw_rule_period_time
, subs
,
844 SNDRV_PCM_HW_PARAM_FORMAT
,
845 SNDRV_PCM_HW_PARAM_CHANNELS
,
846 SNDRV_PCM_HW_PARAM_RATE
,
851 if ((err
= snd_usb_pcm_check_knot(runtime
, subs
)) < 0)
856 static int snd_usb_pcm_open(struct snd_pcm_substream
*substream
, int direction
)
858 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
859 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
860 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
862 subs
->interface
= -1;
863 subs
->altset_idx
= 0;
864 runtime
->hw
= snd_usb_hardware
;
865 runtime
->private_data
= subs
;
866 subs
->pcm_substream
= substream
;
867 return setup_hw_info(runtime
, subs
);
870 static int snd_usb_pcm_close(struct snd_pcm_substream
*substream
, int direction
)
872 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
873 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
875 if (!as
->chip
->shutdown
&& subs
->interface
>= 0) {
876 usb_set_interface(subs
->dev
, subs
->interface
, 0);
877 subs
->interface
= -1;
879 subs
->pcm_substream
= NULL
;
883 static int snd_usb_playback_open(struct snd_pcm_substream
*substream
)
885 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
888 static int snd_usb_playback_close(struct snd_pcm_substream
*substream
)
890 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
893 static int snd_usb_capture_open(struct snd_pcm_substream
*substream
)
895 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_CAPTURE
);
898 static int snd_usb_capture_close(struct snd_pcm_substream
*substream
)
900 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_CAPTURE
);
903 static struct snd_pcm_ops snd_usb_playback_ops
= {
904 .open
= snd_usb_playback_open
,
905 .close
= snd_usb_playback_close
,
906 .ioctl
= snd_pcm_lib_ioctl
,
907 .hw_params
= snd_usb_hw_params
,
908 .hw_free
= snd_usb_hw_free
,
909 .prepare
= snd_usb_pcm_prepare
,
910 .trigger
= snd_usb_substream_playback_trigger
,
911 .pointer
= snd_usb_pcm_pointer
,
912 .page
= snd_pcm_lib_get_vmalloc_page
,
913 .mmap
= snd_pcm_lib_mmap_vmalloc
,
916 static struct snd_pcm_ops snd_usb_capture_ops
= {
917 .open
= snd_usb_capture_open
,
918 .close
= snd_usb_capture_close
,
919 .ioctl
= snd_pcm_lib_ioctl
,
920 .hw_params
= snd_usb_hw_params
,
921 .hw_free
= snd_usb_hw_free
,
922 .prepare
= snd_usb_pcm_prepare
,
923 .trigger
= snd_usb_substream_capture_trigger
,
924 .pointer
= snd_usb_pcm_pointer
,
925 .page
= snd_pcm_lib_get_vmalloc_page
,
926 .mmap
= snd_pcm_lib_mmap_vmalloc
,
929 void snd_usb_set_pcm_ops(struct snd_pcm
*pcm
, int stream
)
931 snd_pcm_set_ops(pcm
, stream
,
932 stream
== SNDRV_PCM_STREAM_PLAYBACK
?
933 &snd_usb_playback_ops
: &snd_usb_capture_ops
);