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Merge branch 'akpm'
[linux-2.6/next.git] / sound / usb / pcm.c
blobb8dcbf407bbbbe10bf4daf39b65d4f6e06ec65b7
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/slab.h>
19 #include <linux/usb.h>
20 #include <linux/usb/audio.h>
21 #include <linux/usb/audio-v2.h>
22
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26
27 #include "usbaudio.h"
28 #include "card.h"
29 #include "quirks.h"
30 #include "debug.h"
31 #include "urb.h"
32 #include "helper.h"
33 #include "pcm.h"
34 #include "clock.h"
35 #include "power.h"
36
37 /*
38 * return the current pcm pointer. just based on the hwptr_done value.
39 */
40 static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
41 {
42 struct snd_usb_substream *subs;
43 unsigned int hwptr_done;
44
45 subs = (struct snd_usb_substream *)substream->runtime->private_data;
46 spin_lock(&subs->lock);
47 hwptr_done = subs->hwptr_done;
48 spin_unlock(&subs->lock);
49 return hwptr_done / (substream->runtime->frame_bits >> 3);
50 }
51
52 /*
53 * find a matching audio format
54 */
55 static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
56 unsigned int rate, unsigned int channels)
57 {
58 struct list_head *p;
59 struct audioformat *found = NULL;
60 int cur_attr = 0, attr;
61
62 list_for_each(p, &subs->fmt_list) {
63 struct audioformat *fp;
64 fp = list_entry(p, struct audioformat, list);
65 if (!(fp->formats & (1uLL << format)))
66 continue;
67 if (fp->channels != channels)
68 continue;
69 if (rate < fp->rate_min || rate > fp->rate_max)
70 continue;
71 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
72 unsigned int i;
73 for (i = 0; i < fp->nr_rates; i++)
74 if (fp->rate_table[i] == rate)
75 break;
76 if (i >= fp->nr_rates)
77 continue;
78 }
79 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
80 if (! found) {
81 found = fp;
82 cur_attr = attr;
83 continue;
84 }
85 /* avoid async out and adaptive in if the other method
86 * supports the same format.
87 * this is a workaround for the case like
88 * M-audio audiophile USB.
89 */
90 if (attr != cur_attr) {
91 if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
92 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
93 (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
94 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
95 continue;
96 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
97 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
98 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
99 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
100 found = fp;
101 cur_attr = attr;
102 continue;
103 }
104 }
105 /* find the format with the largest max. packet size */
106 if (fp->maxpacksize > found->maxpacksize) {
107 found = fp;
108 cur_attr = attr;
109 }
110 }
111 return found;
112 }
113
114 static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
115 struct usb_host_interface *alts,
116 struct audioformat *fmt)
117 {
118 struct usb_device *dev = chip->dev;
119 unsigned int ep;
120 unsigned char data[1];
121 int err;
122
123 ep = get_endpoint(alts, 0)->bEndpointAddress;
124
125 data[0] = 1;
126 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
127 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
128 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
129 data, sizeof(data), 1000)) < 0) {
130 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
131 dev->devnum, iface, ep);
132 return err;
133 }
134
135 return 0;
136 }
137
138 static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
139 struct usb_host_interface *alts,
140 struct audioformat *fmt)
141 {
142 struct usb_device *dev = chip->dev;
143 unsigned char data[1];
144 unsigned int ep;
145 int err;
146
147 ep = get_endpoint(alts, 0)->bEndpointAddress;
148
149 data[0] = 1;
150 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
151 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
152 UAC2_EP_CS_PITCH << 8, 0,
153 data, sizeof(data), 1000)) < 0) {
154 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2)\n",
155 dev->devnum, iface, fmt->altsetting);
156 return err;
157 }
158
159 return 0;
160 }
161
162 /*
163 * initialize the pitch control and sample rate
164 */
165 int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
166 struct usb_host_interface *alts,
167 struct audioformat *fmt)
168 {
169 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
170
171 /* if endpoint doesn't have pitch control, bail out */
172 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
173 return 0;
174
175 switch (altsd->bInterfaceProtocol) {
176 case UAC_VERSION_1:
177 default:
178 return init_pitch_v1(chip, iface, alts, fmt);
179
180 case UAC_VERSION_2:
181 return init_pitch_v2(chip, iface, alts, fmt);
182 }
183 }
184
185 /*
186 * find a matching format and set up the interface
187 */
188 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
189 {
190 struct usb_device *dev = subs->dev;
191 struct usb_host_interface *alts;
192 struct usb_interface_descriptor *altsd;
193 struct usb_interface *iface;
194 unsigned int ep, attr;
195 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
196 int err;
197
198 iface = usb_ifnum_to_if(dev, fmt->iface);
199 if (WARN_ON(!iface))
200 return -EINVAL;
201 alts = &iface->altsetting[fmt->altset_idx];
202 altsd = get_iface_desc(alts);
203 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
204 return -EINVAL;
205
206 if (fmt == subs->cur_audiofmt)
207 return 0;
208
209 /* close the old interface */
210 if (subs->interface >= 0 && subs->interface != fmt->iface) {
211 if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
212 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
213 dev->devnum, fmt->iface, fmt->altsetting);
214 return -EIO;
215 }
216 subs->interface = -1;
217 subs->altset_idx = 0;
218 }
219
220 /* set interface */
221 if (subs->interface != fmt->iface || subs->altset_idx != fmt->altset_idx) {
222 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
223 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
224 dev->devnum, fmt->iface, fmt->altsetting);
225 return -EIO;
226 }
227 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
228 subs->interface = fmt->iface;
229 subs->altset_idx = fmt->altset_idx;
230 }
231
232 /* create a data pipe */
233 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
234 if (is_playback)
235 subs->datapipe = usb_sndisocpipe(dev, ep);
236 else
237 subs->datapipe = usb_rcvisocpipe(dev, ep);
238 subs->datainterval = fmt->datainterval;
239 subs->syncpipe = subs->syncinterval = 0;
240 subs->maxpacksize = fmt->maxpacksize;
241 subs->syncmaxsize = 0;
242 subs->fill_max = 0;
243
244 /* we need a sync pipe in async OUT or adaptive IN mode */
245 /* check the number of EP, since some devices have broken
246 * descriptors which fool us. if it has only one EP,
247 * assume it as adaptive-out or sync-in.
248 */
249 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
250 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
251 (! is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
252 altsd->bNumEndpoints >= 2) {
253 /* check sync-pipe endpoint */
254 /* ... and check descriptor size before accessing bSynchAddress
255 because there is a version of the SB Audigy 2 NX firmware lacking
256 the audio fields in the endpoint descriptors */
257 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
258 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
259 get_endpoint(alts, 1)->bSynchAddress != 0)) {
260 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
261 dev->devnum, fmt->iface, fmt->altsetting);
262 return -EINVAL;
263 }
264 ep = get_endpoint(alts, 1)->bEndpointAddress;
265 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
266 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
267 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
268 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
269 dev->devnum, fmt->iface, fmt->altsetting);
270 return -EINVAL;
271 }
272 ep &= USB_ENDPOINT_NUMBER_MASK;
273 if (is_playback)
274 subs->syncpipe = usb_rcvisocpipe(dev, ep);
275 else
276 subs->syncpipe = usb_sndisocpipe(dev, ep);
277 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
278 get_endpoint(alts, 1)->bRefresh >= 1 &&
279 get_endpoint(alts, 1)->bRefresh <= 9)
280 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
281 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
282 subs->syncinterval = 1;
283 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
284 get_endpoint(alts, 1)->bInterval <= 16)
285 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
286 else
287 subs->syncinterval = 3;
288 subs->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize);
289 }
290
291 /* always fill max packet size */
292 if (fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX)
293 subs->fill_max = 1;
294
295 if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0)
296 return err;
297
298 subs->cur_audiofmt = fmt;
299
300 snd_usb_set_format_quirk(subs, fmt);
301
302 #if 0
303 printk(KERN_DEBUG
304 "setting done: format = %d, rate = %d..%d, channels = %d\n",
305 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
306 printk(KERN_DEBUG
307 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
308 subs->datapipe, subs->syncpipe);
309 #endif
310
311 return 0;
312 }
313
314 /*
315 * hw_params callback
316 *
317 * allocate a buffer and set the given audio format.
318 *
319 * so far we use a physically linear buffer although packetize transfer
320 * doesn't need a continuous area.
321 * if sg buffer is supported on the later version of alsa, we'll follow
322 * that.
323 */
324 static int snd_usb_hw_params(struct snd_pcm_substream *substream,
325 struct snd_pcm_hw_params *hw_params)
326 {
327 struct snd_usb_substream *subs = substream->runtime->private_data;
328 struct audioformat *fmt;
329 unsigned int channels, rate, format;
330 int ret, changed;
331
332 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
333 params_buffer_bytes(hw_params));
334 if (ret < 0)
335 return ret;
336
337 format = params_format(hw_params);
338 rate = params_rate(hw_params);
339 channels = params_channels(hw_params);
340 fmt = find_format(subs, format, rate, channels);
341 if (!fmt) {
342 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
343 format, rate, channels);
344 return -EINVAL;
345 }
346
347 changed = subs->cur_audiofmt != fmt ||
348 subs->period_bytes != params_period_bytes(hw_params) ||
349 subs->cur_rate != rate;
350 if ((ret = set_format(subs, fmt)) < 0)
351 return ret;
352
353 if (subs->cur_rate != rate) {
354 struct usb_host_interface *alts;
355 struct usb_interface *iface;
356 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
357 alts = &iface->altsetting[fmt->altset_idx];
358 ret = snd_usb_init_sample_rate(subs->stream->chip, subs->interface, alts, fmt, rate);
359 if (ret < 0)
360 return ret;
361 subs->cur_rate = rate;
362 }
363
364 if (changed) {
365 mutex_lock(&subs->stream->chip->shutdown_mutex);
366 /* format changed */
367 snd_usb_release_substream_urbs(subs, 0);
368 /* influenced: period_bytes, channels, rate, format, */
369 ret = snd_usb_init_substream_urbs(subs, params_period_bytes(hw_params),
370 params_rate(hw_params),
371 snd_pcm_format_physical_width(params_format(hw_params)) *
372 params_channels(hw_params));
373 mutex_unlock(&subs->stream->chip->shutdown_mutex);
374 }
375
376 return ret;
377 }
378
379 /*
380 * hw_free callback
381 *
382 * reset the audio format and release the buffer
383 */
384 static int snd_usb_hw_free(struct snd_pcm_substream *substream)
385 {
386 struct snd_usb_substream *subs = substream->runtime->private_data;
387
388 subs->cur_audiofmt = NULL;
389 subs->cur_rate = 0;
390 subs->period_bytes = 0;
391 mutex_lock(&subs->stream->chip->shutdown_mutex);
392 snd_usb_release_substream_urbs(subs, 0);
393 mutex_unlock(&subs->stream->chip->shutdown_mutex);
394 return snd_pcm_lib_free_vmalloc_buffer(substream);
395 }
396
397 /*
398 * prepare callback
399 *
400 * only a few subtle things...
401 */
402 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
403 {
404 struct snd_pcm_runtime *runtime = substream->runtime;
405 struct snd_usb_substream *subs = runtime->private_data;
406
407 if (! subs->cur_audiofmt) {
408 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
409 return -ENXIO;
410 }
411
412 /* some unit conversions in runtime */
413 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
414 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
415
416 /* reset the pointer */
417 subs->hwptr_done = 0;
418 subs->transfer_done = 0;
419 subs->phase = 0;
420 runtime->delay = 0;
421
422 return snd_usb_substream_prepare(subs, runtime);
423 }
424
425 static struct snd_pcm_hardware snd_usb_hardware =
426 {
427 .info = SNDRV_PCM_INFO_MMAP |
428 SNDRV_PCM_INFO_MMAP_VALID |
429 SNDRV_PCM_INFO_BATCH |
430 SNDRV_PCM_INFO_INTERLEAVED |
431 SNDRV_PCM_INFO_BLOCK_TRANSFER |
432 SNDRV_PCM_INFO_PAUSE,
433 .buffer_bytes_max = 1024 * 1024,
434 .period_bytes_min = 64,
435 .period_bytes_max = 512 * 1024,
436 .periods_min = 2,
437 .periods_max = 1024,
438 };
439
440 static int hw_check_valid_format(struct snd_usb_substream *subs,
441 struct snd_pcm_hw_params *params,
442 struct audioformat *fp)
443 {
444 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
445 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
446 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
447 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
448 struct snd_mask check_fmts;
449 unsigned int ptime;
450
451 /* check the format */
452 snd_mask_none(&check_fmts);
453 check_fmts.bits[0] = (u32)fp->formats;
454 check_fmts.bits[1] = (u32)(fp->formats >> 32);
455 snd_mask_intersect(&check_fmts, fmts);
456 if (snd_mask_empty(&check_fmts)) {
457 hwc_debug(" > check: no supported format %d\n", fp->format);
458 return 0;
459 }
460 /* check the channels */
461 if (fp->channels < ct->min || fp->channels > ct->max) {
462 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
463 return 0;
464 }
465 /* check the rate is within the range */
466 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
467 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
468 return 0;
469 }
470 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
471 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
472 return 0;
473 }
474 /* check whether the period time is >= the data packet interval */
475 if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) {
476 ptime = 125 * (1 << fp->datainterval);
477 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
478 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
479 return 0;
480 }
481 }
482 return 1;
483 }
484
485 static int hw_rule_rate(struct snd_pcm_hw_params *params,
486 struct snd_pcm_hw_rule *rule)
487 {
488 struct snd_usb_substream *subs = rule->private;
489 struct list_head *p;
490 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
491 unsigned int rmin, rmax;
492 int changed;
493
494 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
495 changed = 0;
496 rmin = rmax = 0;
497 list_for_each(p, &subs->fmt_list) {
498 struct audioformat *fp;
499 fp = list_entry(p, struct audioformat, list);
500 if (!hw_check_valid_format(subs, params, fp))
501 continue;
502 if (changed++) {
503 if (rmin > fp->rate_min)
504 rmin = fp->rate_min;
505 if (rmax < fp->rate_max)
506 rmax = fp->rate_max;
507 } else {
508 rmin = fp->rate_min;
509 rmax = fp->rate_max;
510 }
511 }
512
513 if (!changed) {
514 hwc_debug(" --> get empty\n");
515 it->empty = 1;
516 return -EINVAL;
517 }
518
519 changed = 0;
520 if (it->min < rmin) {
521 it->min = rmin;
522 it->openmin = 0;
523 changed = 1;
524 }
525 if (it->max > rmax) {
526 it->max = rmax;
527 it->openmax = 0;
528 changed = 1;
529 }
530 if (snd_interval_checkempty(it)) {
531 it->empty = 1;
532 return -EINVAL;
533 }
534 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
535 return changed;
536 }
537
538
539 static int hw_rule_channels(struct snd_pcm_hw_params *params,
540 struct snd_pcm_hw_rule *rule)
541 {
542 struct snd_usb_substream *subs = rule->private;
543 struct list_head *p;
544 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
545 unsigned int rmin, rmax;
546 int changed;
547
548 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
549 changed = 0;
550 rmin = rmax = 0;
551 list_for_each(p, &subs->fmt_list) {
552 struct audioformat *fp;
553 fp = list_entry(p, struct audioformat, list);
554 if (!hw_check_valid_format(subs, params, fp))
555 continue;
556 if (changed++) {
557 if (rmin > fp->channels)
558 rmin = fp->channels;
559 if (rmax < fp->channels)
560 rmax = fp->channels;
561 } else {
562 rmin = fp->channels;
563 rmax = fp->channels;
564 }
565 }
566
567 if (!changed) {
568 hwc_debug(" --> get empty\n");
569 it->empty = 1;
570 return -EINVAL;
571 }
572
573 changed = 0;
574 if (it->min < rmin) {
575 it->min = rmin;
576 it->openmin = 0;
577 changed = 1;
578 }
579 if (it->max > rmax) {
580 it->max = rmax;
581 it->openmax = 0;
582 changed = 1;
583 }
584 if (snd_interval_checkempty(it)) {
585 it->empty = 1;
586 return -EINVAL;
587 }
588 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
589 return changed;
590 }
591
592 static int hw_rule_format(struct snd_pcm_hw_params *params,
593 struct snd_pcm_hw_rule *rule)
594 {
595 struct snd_usb_substream *subs = rule->private;
596 struct list_head *p;
597 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
598 u64 fbits;
599 u32 oldbits[2];
600 int changed;
601
602 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
603 fbits = 0;
604 list_for_each(p, &subs->fmt_list) {
605 struct audioformat *fp;
606 fp = list_entry(p, struct audioformat, list);
607 if (!hw_check_valid_format(subs, params, fp))
608 continue;
609 fbits |= fp->formats;
610 }
611
612 oldbits[0] = fmt->bits[0];
613 oldbits[1] = fmt->bits[1];
614 fmt->bits[0] &= (u32)fbits;
615 fmt->bits[1] &= (u32)(fbits >> 32);
616 if (!fmt->bits[0] && !fmt->bits[1]) {
617 hwc_debug(" --> get empty\n");
618 return -EINVAL;
619 }
620 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
621 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
622 return changed;
623 }
624
625 static int hw_rule_period_time(struct snd_pcm_hw_params *params,
626 struct snd_pcm_hw_rule *rule)
627 {
628 struct snd_usb_substream *subs = rule->private;
629 struct audioformat *fp;
630 struct snd_interval *it;
631 unsigned char min_datainterval;
632 unsigned int pmin;
633 int changed;
634
635 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
636 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
637 min_datainterval = 0xff;
638 list_for_each_entry(fp, &subs->fmt_list, list) {
639 if (!hw_check_valid_format(subs, params, fp))
640 continue;
641 min_datainterval = min(min_datainterval, fp->datainterval);
642 }
643 if (min_datainterval == 0xff) {
644 hwc_debug(" --> get empty\n");
645 it->empty = 1;
646 return -EINVAL;
647 }
648 pmin = 125 * (1 << min_datainterval);
649 changed = 0;
650 if (it->min < pmin) {
651 it->min = pmin;
652 it->openmin = 0;
653 changed = 1;
654 }
655 if (snd_interval_checkempty(it)) {
656 it->empty = 1;
657 return -EINVAL;
658 }
659 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
660 return changed;
661 }
662
663 /*
664 * If the device supports unusual bit rates, does the request meet these?
665 */
666 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
667 struct snd_usb_substream *subs)
668 {
669 struct audioformat *fp;
670 int count = 0, needs_knot = 0;
671 int err;
672
673 list_for_each_entry(fp, &subs->fmt_list, list) {
674 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
675 return 0;
676 count += fp->nr_rates;
677 if (fp->rates & SNDRV_PCM_RATE_KNOT)
678 needs_knot = 1;
679 }
680 if (!needs_knot)
681 return 0;
682
683 subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
684 if (!subs->rate_list.list)
685 return -ENOMEM;
686 subs->rate_list.count = count;
687 subs->rate_list.mask = 0;
688 count = 0;
689 list_for_each_entry(fp, &subs->fmt_list, list) {
690 int i;
691 for (i = 0; i < fp->nr_rates; i++)
692 subs->rate_list.list[count++] = fp->rate_table[i];
693 }
694 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
695 &subs->rate_list);
696 if (err < 0)
697 return err;
698
699 return 0;
700 }
701
702
703 /*
704 * set up the runtime hardware information.
705 */
706
707 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
708 {
709 struct list_head *p;
710 unsigned int pt, ptmin;
711 int param_period_time_if_needed;
712 int err;
713
714 runtime->hw.formats = subs->formats;
715
716 runtime->hw.rate_min = 0x7fffffff;
717 runtime->hw.rate_max = 0;
718 runtime->hw.channels_min = 256;
719 runtime->hw.channels_max = 0;
720 runtime->hw.rates = 0;
721 ptmin = UINT_MAX;
722 /* check min/max rates and channels */
723 list_for_each(p, &subs->fmt_list) {
724 struct audioformat *fp;
725 fp = list_entry(p, struct audioformat, list);
726 runtime->hw.rates |= fp->rates;
727 if (runtime->hw.rate_min > fp->rate_min)
728 runtime->hw.rate_min = fp->rate_min;
729 if (runtime->hw.rate_max < fp->rate_max)
730 runtime->hw.rate_max = fp->rate_max;
731 if (runtime->hw.channels_min > fp->channels)
732 runtime->hw.channels_min = fp->channels;
733 if (runtime->hw.channels_max < fp->channels)
734 runtime->hw.channels_max = fp->channels;
735 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
736 /* FIXME: there might be more than one audio formats... */
737 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
738 fp->frame_size;
739 }
740 pt = 125 * (1 << fp->datainterval);
741 ptmin = min(ptmin, pt);
742 }
743 err = snd_usb_autoresume(subs->stream->chip);
744 if (err < 0)
745 return err;
746
747 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
748 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
749 /* full speed devices have fixed data packet interval */
750 ptmin = 1000;
751 if (ptmin == 1000)
752 /* if period time doesn't go below 1 ms, no rules needed */
753 param_period_time_if_needed = -1;
754 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
755 ptmin, UINT_MAX);
756
757 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
758 hw_rule_rate, subs,
759 SNDRV_PCM_HW_PARAM_FORMAT,
760 SNDRV_PCM_HW_PARAM_CHANNELS,
761 param_period_time_if_needed,
762 -1)) < 0)
763 goto rep_err;
764 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
765 hw_rule_channels, subs,
766 SNDRV_PCM_HW_PARAM_FORMAT,
767 SNDRV_PCM_HW_PARAM_RATE,
768 param_period_time_if_needed,
769 -1)) < 0)
770 goto rep_err;
771 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
772 hw_rule_format, subs,
773 SNDRV_PCM_HW_PARAM_RATE,
774 SNDRV_PCM_HW_PARAM_CHANNELS,
775 param_period_time_if_needed,
776 -1)) < 0)
777 goto rep_err;
778 if (param_period_time_if_needed >= 0) {
779 err = snd_pcm_hw_rule_add(runtime, 0,
780 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
781 hw_rule_period_time, subs,
782 SNDRV_PCM_HW_PARAM_FORMAT,
783 SNDRV_PCM_HW_PARAM_CHANNELS,
784 SNDRV_PCM_HW_PARAM_RATE,
785 -1);
786 if (err < 0)
787 goto rep_err;
788 }
789 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
790 goto rep_err;
791 return 0;
792
793 rep_err:
794 snd_usb_autosuspend(subs->stream->chip);
795 return err;
796 }
797
798 static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
799 {
800 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
801 struct snd_pcm_runtime *runtime = substream->runtime;
802 struct snd_usb_substream *subs = &as->substream[direction];
803
804 subs->interface = -1;
805 subs->altset_idx = 0;
806 runtime->hw = snd_usb_hardware;
807 runtime->private_data = subs;
808 subs->pcm_substream = substream;
809 /* runtime PM is also done there */
810 return setup_hw_info(runtime, subs);
811 }
812
813 static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
814 {
815 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
816 struct snd_usb_substream *subs = &as->substream[direction];
817
818 if (!as->chip->shutdown && subs->interface >= 0) {
819 usb_set_interface(subs->dev, subs->interface, 0);
820 subs->interface = -1;
821 }
822 subs->pcm_substream = NULL;
823 snd_usb_autosuspend(subs->stream->chip);
824 return 0;
825 }
826
827 static int snd_usb_playback_open(struct snd_pcm_substream *substream)
828 {
829 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
830 }
831
832 static int snd_usb_playback_close(struct snd_pcm_substream *substream)
833 {
834 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
835 }
836
837 static int snd_usb_capture_open(struct snd_pcm_substream *substream)
838 {
839 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
840 }
841
842 static int snd_usb_capture_close(struct snd_pcm_substream *substream)
843 {
844 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
845 }
846
847 static struct snd_pcm_ops snd_usb_playback_ops = {
848 .open = snd_usb_playback_open,
849 .close = snd_usb_playback_close,
850 .ioctl = snd_pcm_lib_ioctl,
851 .hw_params = snd_usb_hw_params,
852 .hw_free = snd_usb_hw_free,
853 .prepare = snd_usb_pcm_prepare,
854 .trigger = snd_usb_substream_playback_trigger,
855 .pointer = snd_usb_pcm_pointer,
856 .page = snd_pcm_lib_get_vmalloc_page,
857 .mmap = snd_pcm_lib_mmap_vmalloc,
858 };
859
860 static struct snd_pcm_ops snd_usb_capture_ops = {
861 .open = snd_usb_capture_open,
862 .close = snd_usb_capture_close,
863 .ioctl = snd_pcm_lib_ioctl,
864 .hw_params = snd_usb_hw_params,
865 .hw_free = snd_usb_hw_free,
866 .prepare = snd_usb_pcm_prepare,
867 .trigger = snd_usb_substream_capture_trigger,
868 .pointer = snd_usb_pcm_pointer,
869 .page = snd_pcm_lib_get_vmalloc_page,
870 .mmap = snd_pcm_lib_mmap_vmalloc,
871 };
872
873 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
874 {
875 snd_pcm_set_ops(pcm, stream,
876 stream == SNDRV_PCM_STREAM_PLAYBACK ?
877 &snd_usb_playback_ops : &snd_usb_capture_ops);
878 }
linux-next