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-rw-r--r--sound/usb/pcm.c845
1 files changed, 845 insertions, 0 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
new file mode 100644
index 000000000000..87863ccf9068
--- /dev/null
+++ b/sound/usb/pcm.c
@@ -0,0 +1,845 @@
1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 */
16
17#include <linux/init.h>
18#include <linux/usb.h>
19#include <linux/usb/audio.h>
20
21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24
25#include "usbaudio.h"
26#include "card.h"
27#include "quirks.h"
28#include "debug.h"
29#include "urb.h"
30#include "helper.h"
31#include "pcm.h"
32
33/*
34 * return the current pcm pointer. just based on the hwptr_done value.
35 */
36static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
37{
38 struct snd_usb_substream *subs;
39 unsigned int hwptr_done;
40
41 subs = (struct snd_usb_substream *)substream->runtime->private_data;
42 spin_lock(&subs->lock);
43 hwptr_done = subs->hwptr_done;
44 spin_unlock(&subs->lock);
45 return hwptr_done / (substream->runtime->frame_bits >> 3);
46}
47
48/*
49 * find a matching audio format
50 */
51static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
52 unsigned int rate, unsigned int channels)
53{
54 struct list_head *p;
55 struct audioformat *found = NULL;
56 int cur_attr = 0, attr;
57
58 list_for_each(p, &subs->fmt_list) {
59 struct audioformat *fp;
60 fp = list_entry(p, struct audioformat, list);
61 if (fp->format != format || fp->channels != channels)
62 continue;
63 if (rate < fp->rate_min || rate > fp->rate_max)
64 continue;
65 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
66 unsigned int i;
67 for (i = 0; i < fp->nr_rates; i++)
68 if (fp->rate_table[i] == rate)
69 break;
70 if (i >= fp->nr_rates)
71 continue;
72 }
73 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
74 if (! found) {
75 found = fp;
76 cur_attr = attr;
77 continue;
78 }
79 /* avoid async out and adaptive in if the other method
80 * supports the same format.
81 * this is a workaround for the case like
82 * M-audio audiophile USB.
83 */
84 if (attr != cur_attr) {
85 if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
86 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
87 (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
88 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
89 continue;
90 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
91 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
92 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
93 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
94 found = fp;
95 cur_attr = attr;
96 continue;
97 }
98 }
99 /* find the format with the largest max. packet size */
100 if (fp->maxpacksize > found->maxpacksize) {
101 found = fp;
102 cur_attr = attr;
103 }
104 }
105 return found;
106}
107
108
109/*
110 * initialize the picth control and sample rate
111 */
112int snd_usb_init_pitch(struct usb_device *dev, int iface,
113 struct usb_host_interface *alts,
114 struct audioformat *fmt)
115{
116 unsigned int ep;
117 unsigned char data[1];
118 int err;
119
120 ep = get_endpoint(alts, 0)->bEndpointAddress;
121 /* if endpoint has pitch control, enable it */
122 if (fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL) {
123 data[0] = 1;
124 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
125 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
126 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
127 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
128 dev->devnum, iface, ep);
129 return err;
130 }
131 }
132 return 0;
133}
134
135int snd_usb_init_sample_rate(struct usb_device *dev, int iface,
136 struct usb_host_interface *alts,
137 struct audioformat *fmt, int rate)
138{
139 unsigned int ep;
140 unsigned char data[3];
141 int err;
142
143 ep = get_endpoint(alts, 0)->bEndpointAddress;
144 /* if endpoint has sampling rate control, set it */
145 if (fmt->attributes & UAC_EP_CS_ATTR_SAMPLE_RATE) {
146 int crate;
147 data[0] = rate;
148 data[1] = rate >> 8;
149 data[2] = rate >> 16;
150 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
151 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
152 UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, 1000)) < 0) {
153 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep %#x\n",
154 dev->devnum, iface, fmt->altsetting, rate, ep);
155 return err;
156 }
157 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC_GET_CUR,
158 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
159 UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, 1000)) < 0) {
160 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep %#x\n",
161 dev->devnum, iface, fmt->altsetting, ep);
162 return 0; /* some devices don't support reading */
163 }
164 crate = data[0] | (data[1] << 8) | (data[2] << 16);
165 if (crate != rate) {
166 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
167 // runtime->rate = crate;
168 }
169 }
170 return 0;
171}
172
173/*
174 * find a matching format and set up the interface
175 */
176static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
177{
178 struct usb_device *dev = subs->dev;
179 struct usb_host_interface *alts;
180 struct usb_interface_descriptor *altsd;
181 struct usb_interface *iface;
182 unsigned int ep, attr;
183 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
184 int err;
185
186 iface = usb_ifnum_to_if(dev, fmt->iface);
187 if (WARN_ON(!iface))
188 return -EINVAL;
189 alts = &iface->altsetting[fmt->altset_idx];
190 altsd = get_iface_desc(alts);
191 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
192 return -EINVAL;
193
194 if (fmt == subs->cur_audiofmt)
195 return 0;
196
197 /* close the old interface */
198 if (subs->interface >= 0 && subs->interface != fmt->iface) {
199 if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
200 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
201 dev->devnum, fmt->iface, fmt->altsetting);
202 return -EIO;
203 }
204 subs->interface = -1;
205 subs->format = 0;
206 }
207
208 /* set interface */
209 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
210 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
211 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
212 dev->devnum, fmt->iface, fmt->altsetting);
213 return -EIO;
214 }
215 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
216 subs->interface = fmt->iface;
217 subs->format = fmt->altset_idx;
218 }
219
220 /* create a data pipe */
221 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
222 if (is_playback)
223 subs->datapipe = usb_sndisocpipe(dev, ep);
224 else
225 subs->datapipe = usb_rcvisocpipe(dev, ep);
226 subs->datainterval = fmt->datainterval;
227 subs->syncpipe = subs->syncinterval = 0;
228 subs->maxpacksize = fmt->maxpacksize;
229 subs->fill_max = 0;
230
231 /* we need a sync pipe in async OUT or adaptive IN mode */
232 /* check the number of EP, since some devices have broken
233 * descriptors which fool us. if it has only one EP,
234 * assume it as adaptive-out or sync-in.
235 */
236 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
237 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
238 (! is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
239 altsd->bNumEndpoints >= 2) {
240 /* check sync-pipe endpoint */
241 /* ... and check descriptor size before accessing bSynchAddress
242 because there is a version of the SB Audigy 2 NX firmware lacking
243 the audio fields in the endpoint descriptors */
244 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
245 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
246 get_endpoint(alts, 1)->bSynchAddress != 0)) {
247 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
248 dev->devnum, fmt->iface, fmt->altsetting);
249 return -EINVAL;
250 }
251 ep = get_endpoint(alts, 1)->bEndpointAddress;
252 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
253 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
254 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
255 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
256 dev->devnum, fmt->iface, fmt->altsetting);
257 return -EINVAL;
258 }
259 ep &= USB_ENDPOINT_NUMBER_MASK;
260 if (is_playback)
261 subs->syncpipe = usb_rcvisocpipe(dev, ep);
262 else
263 subs->syncpipe = usb_sndisocpipe(dev, ep);
264 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
265 get_endpoint(alts, 1)->bRefresh >= 1 &&
266 get_endpoint(alts, 1)->bRefresh <= 9)
267 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
268 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
269 subs->syncinterval = 1;
270 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
271 get_endpoint(alts, 1)->bInterval <= 16)
272 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
273 else
274 subs->syncinterval = 3;
275 }
276
277 /* always fill max packet size */
278 if (fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX)
279 subs->fill_max = 1;
280
281 if ((err = snd_usb_init_pitch(dev, subs->interface, alts, fmt)) < 0)
282 return err;
283
284 subs->cur_audiofmt = fmt;
285
286 snd_usb_set_format_quirk(subs, fmt);
287
288#if 0
289 printk(KERN_DEBUG
290 "setting done: format = %d, rate = %d..%d, channels = %d\n",
291 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
292 printk(KERN_DEBUG
293 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
294 subs->datapipe, subs->syncpipe);
295#endif
296
297 return 0;
298}
299
300/*
301 * hw_params callback
302 *
303 * allocate a buffer and set the given audio format.
304 *
305 * so far we use a physically linear buffer although packetize transfer
306 * doesn't need a continuous area.
307 * if sg buffer is supported on the later version of alsa, we'll follow
308 * that.
309 */
310static int snd_usb_hw_params(struct snd_pcm_substream *substream,
311 struct snd_pcm_hw_params *hw_params)
312{
313 struct snd_usb_substream *subs = substream->runtime->private_data;
314 struct audioformat *fmt;
315 unsigned int channels, rate, format;
316 int ret, changed;
317
318 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
319 params_buffer_bytes(hw_params));
320 if (ret < 0)
321 return ret;
322
323 format = params_format(hw_params);
324 rate = params_rate(hw_params);
325 channels = params_channels(hw_params);
326 fmt = find_format(subs, format, rate, channels);
327 if (!fmt) {
328 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
329 format, rate, channels);
330 return -EINVAL;
331 }
332
333 changed = subs->cur_audiofmt != fmt ||
334 subs->period_bytes != params_period_bytes(hw_params) ||
335 subs->cur_rate != rate;
336 if ((ret = set_format(subs, fmt)) < 0)
337 return ret;
338
339 if (subs->cur_rate != rate) {
340 struct usb_host_interface *alts;
341 struct usb_interface *iface;
342 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
343 alts = &iface->altsetting[fmt->altset_idx];
344 ret = snd_usb_init_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
345 if (ret < 0)
346 return ret;
347 subs->cur_rate = rate;
348 }
349
350 if (changed) {
351 /* format changed */
352 snd_usb_release_substream_urbs(subs, 0);
353 /* influenced: period_bytes, channels, rate, format, */
354 ret = snd_usb_init_substream_urbs(subs, params_period_bytes(hw_params),
355 params_rate(hw_params),
356 snd_pcm_format_physical_width(params_format(hw_params)) *
357 params_channels(hw_params));
358 }
359
360 return ret;
361}
362
363/*
364 * hw_free callback
365 *
366 * reset the audio format and release the buffer
367 */
368static int snd_usb_hw_free(struct snd_pcm_substream *substream)
369{
370 struct snd_usb_substream *subs = substream->runtime->private_data;
371
372 subs->cur_audiofmt = NULL;
373 subs->cur_rate = 0;
374 subs->period_bytes = 0;
375 if (!subs->stream->chip->shutdown)
376 snd_usb_release_substream_urbs(subs, 0);
377 return snd_pcm_lib_free_vmalloc_buffer(substream);
378}
379
380/*
381 * prepare callback
382 *
383 * only a few subtle things...
384 */
385static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
386{
387 struct snd_pcm_runtime *runtime = substream->runtime;
388 struct snd_usb_substream *subs = runtime->private_data;
389
390 if (! subs->cur_audiofmt) {
391 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
392 return -ENXIO;
393 }
394
395 /* some unit conversions in runtime */
396 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
397 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
398
399 /* reset the pointer */
400 subs->hwptr_done = 0;
401 subs->transfer_done = 0;
402 subs->phase = 0;
403 runtime->delay = 0;
404
405 return snd_usb_substream_prepare(subs, runtime);
406}
407
408static struct snd_pcm_hardware snd_usb_hardware =
409{
410 .info = SNDRV_PCM_INFO_MMAP |
411 SNDRV_PCM_INFO_MMAP_VALID |
412 SNDRV_PCM_INFO_BATCH |
413 SNDRV_PCM_INFO_INTERLEAVED |
414 SNDRV_PCM_INFO_BLOCK_TRANSFER |
415 SNDRV_PCM_INFO_PAUSE,
416 .buffer_bytes_max = 1024 * 1024,
417 .period_bytes_min = 64,
418 .period_bytes_max = 512 * 1024,
419 .periods_min = 2,
420 .periods_max = 1024,
421};
422
423static int hw_check_valid_format(struct snd_usb_substream *subs,
424 struct snd_pcm_hw_params *params,
425 struct audioformat *fp)
426{
427 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
428 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
429 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
430 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
431 unsigned int ptime;
432
433 /* check the format */
434 if (!snd_mask_test(fmts, fp->format)) {
435 hwc_debug(" > check: no supported format %d\n", fp->format);
436 return 0;
437 }
438 /* check the channels */
439 if (fp->channels < ct->min || fp->channels > ct->max) {
440 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
441 return 0;
442 }
443 /* check the rate is within the range */
444 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
445 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
446 return 0;
447 }
448 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
449 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
450 return 0;
451 }
452 /* check whether the period time is >= the data packet interval */
453 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) {
454 ptime = 125 * (1 << fp->datainterval);
455 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
456 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
457 return 0;
458 }
459 }
460 return 1;
461}
462
463static int hw_rule_rate(struct snd_pcm_hw_params *params,
464 struct snd_pcm_hw_rule *rule)
465{
466 struct snd_usb_substream *subs = rule->private;
467 struct list_head *p;
468 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
469 unsigned int rmin, rmax;
470 int changed;
471
472 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
473 changed = 0;
474 rmin = rmax = 0;
475 list_for_each(p, &subs->fmt_list) {
476 struct audioformat *fp;
477 fp = list_entry(p, struct audioformat, list);
478 if (!hw_check_valid_format(subs, params, fp))
479 continue;
480 if (changed++) {
481 if (rmin > fp->rate_min)
482 rmin = fp->rate_min;
483 if (rmax < fp->rate_max)
484 rmax = fp->rate_max;
485 } else {
486 rmin = fp->rate_min;
487 rmax = fp->rate_max;
488 }
489 }
490
491 if (!changed) {
492 hwc_debug(" --> get empty\n");
493 it->empty = 1;
494 return -EINVAL;
495 }
496
497 changed = 0;
498 if (it->min < rmin) {
499 it->min = rmin;
500 it->openmin = 0;
501 changed = 1;
502 }
503 if (it->max > rmax) {
504 it->max = rmax;
505 it->openmax = 0;
506 changed = 1;
507 }
508 if (snd_interval_checkempty(it)) {
509 it->empty = 1;
510 return -EINVAL;
511 }
512 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
513 return changed;
514}
515
516
517static int hw_rule_channels(struct snd_pcm_hw_params *params,
518 struct snd_pcm_hw_rule *rule)
519{
520 struct snd_usb_substream *subs = rule->private;
521 struct list_head *p;
522 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
523 unsigned int rmin, rmax;
524 int changed;
525
526 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
527 changed = 0;
528 rmin = rmax = 0;
529 list_for_each(p, &subs->fmt_list) {
530 struct audioformat *fp;
531 fp = list_entry(p, struct audioformat, list);
532 if (!hw_check_valid_format(subs, params, fp))
533 continue;
534 if (changed++) {
535 if (rmin > fp->channels)
536 rmin = fp->channels;
537 if (rmax < fp->channels)
538 rmax = fp->channels;
539 } else {
540 rmin = fp->channels;
541 rmax = fp->channels;
542 }
543 }
544
545 if (!changed) {
546 hwc_debug(" --> get empty\n");
547 it->empty = 1;
548 return -EINVAL;
549 }
550
551 changed = 0;
552 if (it->min < rmin) {
553 it->min = rmin;
554 it->openmin = 0;
555 changed = 1;
556 }
557 if (it->max > rmax) {
558 it->max = rmax;
559 it->openmax = 0;
560 changed = 1;
561 }
562 if (snd_interval_checkempty(it)) {
563 it->empty = 1;
564 return -EINVAL;
565 }
566 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
567 return changed;
568}
569
570static int hw_rule_format(struct snd_pcm_hw_params *params,
571 struct snd_pcm_hw_rule *rule)
572{
573 struct snd_usb_substream *subs = rule->private;
574 struct list_head *p;
575 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
576 u64 fbits;
577 u32 oldbits[2];
578 int changed;
579
580 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
581 fbits = 0;
582 list_for_each(p, &subs->fmt_list) {
583 struct audioformat *fp;
584 fp = list_entry(p, struct audioformat, list);
585 if (!hw_check_valid_format(subs, params, fp))
586 continue;
587 fbits |= (1ULL << fp->format);
588 }
589
590 oldbits[0] = fmt->bits[0];
591 oldbits[1] = fmt->bits[1];
592 fmt->bits[0] &= (u32)fbits;
593 fmt->bits[1] &= (u32)(fbits >> 32);
594 if (!fmt->bits[0] && !fmt->bits[1]) {
595 hwc_debug(" --> get empty\n");
596 return -EINVAL;
597 }
598 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
599 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
600 return changed;
601}
602
603static int hw_rule_period_time(struct snd_pcm_hw_params *params,
604 struct snd_pcm_hw_rule *rule)
605{
606 struct snd_usb_substream *subs = rule->private;
607 struct audioformat *fp;
608 struct snd_interval *it;
609 unsigned char min_datainterval;
610 unsigned int pmin;
611 int changed;
612
613 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
614 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
615 min_datainterval = 0xff;
616 list_for_each_entry(fp, &subs->fmt_list, list) {
617 if (!hw_check_valid_format(subs, params, fp))
618 continue;
619 min_datainterval = min(min_datainterval, fp->datainterval);
620 }
621 if (min_datainterval == 0xff) {
622 hwc_debug(" --> get emtpy\n");
623 it->empty = 1;
624 return -EINVAL;
625 }
626 pmin = 125 * (1 << min_datainterval);
627 changed = 0;
628 if (it->min < pmin) {
629 it->min = pmin;
630 it->openmin = 0;
631 changed = 1;
632 }
633 if (snd_interval_checkempty(it)) {
634 it->empty = 1;
635 return -EINVAL;
636 }
637 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
638 return changed;
639}
640
641/*
642 * If the device supports unusual bit rates, does the request meet these?
643 */
644static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
645 struct snd_usb_substream *subs)
646{
647 struct audioformat *fp;
648 int count = 0, needs_knot = 0;
649 int err;
650
651 list_for_each_entry(fp, &subs->fmt_list, list) {
652 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
653 return 0;
654 count += fp->nr_rates;
655 if (fp->rates & SNDRV_PCM_RATE_KNOT)
656 needs_knot = 1;
657 }
658 if (!needs_knot)
659 return 0;
660
661 subs->rate_list.count = count;
662 subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
663 subs->rate_list.mask = 0;
664 count = 0;
665 list_for_each_entry(fp, &subs->fmt_list, list) {
666 int i;
667 for (i = 0; i < fp->nr_rates; i++)
668 subs->rate_list.list[count++] = fp->rate_table[i];
669 }
670 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
671 &subs->rate_list);
672 if (err < 0)
673 return err;
674
675 return 0;
676}
677
678
679/*
680 * set up the runtime hardware information.
681 */
682
683static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
684{
685 struct list_head *p;
686 unsigned int pt, ptmin;
687 int param_period_time_if_needed;
688 int err;
689
690 runtime->hw.formats = subs->formats;
691
692 runtime->hw.rate_min = 0x7fffffff;
693 runtime->hw.rate_max = 0;
694 runtime->hw.channels_min = 256;
695 runtime->hw.channels_max = 0;
696 runtime->hw.rates = 0;
697 ptmin = UINT_MAX;
698 /* check min/max rates and channels */
699 list_for_each(p, &subs->fmt_list) {
700 struct audioformat *fp;
701 fp = list_entry(p, struct audioformat, list);
702 runtime->hw.rates |= fp->rates;
703 if (runtime->hw.rate_min > fp->rate_min)
704 runtime->hw.rate_min = fp->rate_min;
705 if (runtime->hw.rate_max < fp->rate_max)
706 runtime->hw.rate_max = fp->rate_max;
707 if (runtime->hw.channels_min > fp->channels)
708 runtime->hw.channels_min = fp->channels;
709 if (runtime->hw.channels_max < fp->channels)
710 runtime->hw.channels_max = fp->channels;
711 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
712 /* FIXME: there might be more than one audio formats... */
713 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
714 fp->frame_size;
715 }
716 pt = 125 * (1 << fp->datainterval);
717 ptmin = min(ptmin, pt);
718 }
719
720 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
721 if (snd_usb_get_speed(subs->dev) != USB_SPEED_HIGH)
722 /* full speed devices have fixed data packet interval */
723 ptmin = 1000;
724 if (ptmin == 1000)
725 /* if period time doesn't go below 1 ms, no rules needed */
726 param_period_time_if_needed = -1;
727 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
728 ptmin, UINT_MAX);
729
730 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
731 hw_rule_rate, subs,
732 SNDRV_PCM_HW_PARAM_FORMAT,
733 SNDRV_PCM_HW_PARAM_CHANNELS,
734 param_period_time_if_needed,
735 -1)) < 0)
736 return err;
737 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
738 hw_rule_channels, subs,
739 SNDRV_PCM_HW_PARAM_FORMAT,
740 SNDRV_PCM_HW_PARAM_RATE,
741 param_period_time_if_needed,
742 -1)) < 0)
743 return err;
744 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
745 hw_rule_format, subs,
746 SNDRV_PCM_HW_PARAM_RATE,
747 SNDRV_PCM_HW_PARAM_CHANNELS,
748 param_period_time_if_needed,
749 -1)) < 0)
750 return err;
751 if (param_period_time_if_needed >= 0) {
752 err = snd_pcm_hw_rule_add(runtime, 0,
753 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
754 hw_rule_period_time, subs,
755 SNDRV_PCM_HW_PARAM_FORMAT,
756 SNDRV_PCM_HW_PARAM_CHANNELS,
757 SNDRV_PCM_HW_PARAM_RATE,
758 -1);
759 if (err < 0)
760 return err;
761 }
762 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
763 return err;
764 return 0;
765}
766
767static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
768{
769 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
770 struct snd_pcm_runtime *runtime = substream->runtime;
771 struct snd_usb_substream *subs = &as->substream[direction];
772
773 subs->interface = -1;
774 subs->format = 0;
775 runtime->hw = snd_usb_hardware;
776 runtime->private_data = subs;
777 subs->pcm_substream = substream;
778 return setup_hw_info(runtime, subs);
779}
780
781static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
782{
783 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
784 struct snd_usb_substream *subs = &as->substream[direction];
785
786 if (!as->chip->shutdown && subs->interface >= 0) {
787 usb_set_interface(subs->dev, subs->interface, 0);
788 subs->interface = -1;
789 }
790 subs->pcm_substream = NULL;
791 return 0;
792}
793
794static int snd_usb_playback_open(struct snd_pcm_substream *substream)
795{
796 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
797}
798
799static int snd_usb_playback_close(struct snd_pcm_substream *substream)
800{
801 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
802}
803
804static int snd_usb_capture_open(struct snd_pcm_substream *substream)
805{
806 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
807}
808
809static int snd_usb_capture_close(struct snd_pcm_substream *substream)
810{
811 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
812}
813
814static struct snd_pcm_ops snd_usb_playback_ops = {
815 .open = snd_usb_playback_open,
816 .close = snd_usb_playback_close,
817 .ioctl = snd_pcm_lib_ioctl,
818 .hw_params = snd_usb_hw_params,
819 .hw_free = snd_usb_hw_free,
820 .prepare = snd_usb_pcm_prepare,
821 .trigger = snd_usb_substream_playback_trigger,
822 .pointer = snd_usb_pcm_pointer,
823 .page = snd_pcm_lib_get_vmalloc_page,
824 .mmap = snd_pcm_lib_mmap_vmalloc,
825};
826
827static struct snd_pcm_ops snd_usb_capture_ops = {
828 .open = snd_usb_capture_open,
829 .close = snd_usb_capture_close,
830 .ioctl = snd_pcm_lib_ioctl,
831 .hw_params = snd_usb_hw_params,
832 .hw_free = snd_usb_hw_free,
833 .prepare = snd_usb_pcm_prepare,
834 .trigger = snd_usb_substream_capture_trigger,
835 .pointer = snd_usb_pcm_pointer,
836 .page = snd_pcm_lib_get_vmalloc_page,
837 .mmap = snd_pcm_lib_mmap_vmalloc,
838};
839
840void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
841{
842 snd_pcm_set_ops(pcm, stream,
843 stream == SNDRV_PCM_STREAM_PLAYBACK ?
844 &snd_usb_playback_ops : &snd_usb_capture_ops);
845}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-11 07:36:43 -0500