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ALSA: usbaudio: fix suspend/resume
[deliverable/linux.git] / sound / usb / pcm.c
CommitLineData
e5779998
DM		 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>
9966ddaf 18#include <linux/slab.h>
e5779998
DM		 19#include <linux/usb.h>
20#include <linux/usb/audio.h>
7e847894 21#include <linux/usb/audio-v2.h>
e5779998
DM		 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"
79f920fb 34#include "clock.h"
e5779998
DM		 35
36/*
37 * return the current pcm pointer. just based on the hwptr_done value.
38 */
39static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
40{
41 struct snd_usb_substream *subs;
42 unsigned int hwptr_done;
43
44 subs = (struct snd_usb_substream *)substream->runtime->private_data;
45 spin_lock(&subs->lock);
46 hwptr_done = subs->hwptr_done;
47 spin_unlock(&subs->lock);
48 return hwptr_done / (substream->runtime->frame_bits >> 3);
49}
50
51/*
52 * find a matching audio format
53 */
54static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
55 unsigned int rate, unsigned int channels)
56{
57 struct list_head *p;
58 struct audioformat *found = NULL;
59 int cur_attr = 0, attr;
60
61 list_for_each(p, &subs->fmt_list) {
62 struct audioformat *fp;
63 fp = list_entry(p, struct audioformat, list);
015eb0b0
CL		 64 if (!(fp->formats & (1uLL << format)))
65 continue;
66 if (fp->channels != channels)
e5779998
DM		 67 continue;
68 if (rate < fp->rate_min || rate > fp->rate_max)
69 continue;
70 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
71 unsigned int i;
72 for (i = 0; i < fp->nr_rates; i++)
73 if (fp->rate_table[i] == rate)
74 break;
75 if (i >= fp->nr_rates)
76 continue;
77 }
78 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
79 if (! found) {
80 found = fp;
81 cur_attr = attr;
82 continue;
83 }
84 /* avoid async out and adaptive in if the other method
85 * supports the same format.
86 * this is a workaround for the case like
87 * M-audio audiophile USB.
88 */
89 if (attr != cur_attr) {
90 if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
91 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
92 (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
93 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
94 continue;
95 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
96 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
97 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
98 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
99 found = fp;
100 cur_attr = attr;
101 continue;
102 }
103 }
104 /* find the format with the largest max. packet size */
105 if (fp->maxpacksize > found->maxpacksize) {
106 found = fp;
107 cur_attr = attr;
108 }
109 }
110 return found;
111}
112
767d75ad
DM		 113static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
114 struct usb_host_interface *alts,
115 struct audioformat *fmt)
116{
117 struct usb_device *dev = chip->dev;
118 unsigned int ep;
119 unsigned char data[1];
120 int err;
121
122 ep = get_endpoint(alts, 0)->bEndpointAddress;
123
767d75ad
DM		 124 data[0] = 1;
125 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
126 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
127 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
128 data, sizeof(data), 1000)) < 0) {
129 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
130 dev->devnum, iface, ep);
131 return err;
132 }
133
134 return 0;
135}
e5779998 136
92c25611
DM		 137static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
138 struct usb_host_interface *alts,
139 struct audioformat *fmt)
140{
141 struct usb_device *dev = chip->dev;
142 unsigned char data[1];
143 unsigned int ep;
144 int err;
145
146 ep = get_endpoint(alts, 0)->bEndpointAddress;
147
148 data[0] = 1;
149 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
150 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
151 UAC2_EP_CS_PITCH << 8, 0,
152 data, sizeof(data), 1000)) < 0) {
153 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2)\n",
154 dev->devnum, iface, fmt->altsetting);
155 return err;
156 }
157
158 return 0;
159}
160
e5779998 161/*
92c25611 162 * initialize the pitch control and sample rate
e5779998 163 */
767d75ad 164int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
e5779998
DM		 165 struct usb_host_interface *alts,
166 struct audioformat *fmt)
167{
767d75ad
DM		 168 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
169
92c25611
DM		 170 /* if endpoint doesn't have pitch control, bail out */
171 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
172 return 0;
173
767d75ad
DM		 174 switch (altsd->bInterfaceProtocol) {
175 case UAC_VERSION_1:
a2acad82 176 default:
767d75ad
DM		 177 return init_pitch_v1(chip, iface, alts, fmt);
178
179 case UAC_VERSION_2:
92c25611 180 return init_pitch_v2(chip, iface, alts, fmt);
767d75ad 181 }
767d75ad
DM		 182}
183
e5779998
DM		 184/*
185 * find a matching format and set up the interface
186 */
187static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
188{
189 struct usb_device *dev = subs->dev;
190 struct usb_host_interface *alts;
191 struct usb_interface_descriptor *altsd;
192 struct usb_interface *iface;
193 unsigned int ep, attr;
194 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
195 int err;
196
197 iface = usb_ifnum_to_if(dev, fmt->iface);
198 if (WARN_ON(!iface))
199 return -EINVAL;
200 alts = &iface->altsetting[fmt->altset_idx];
201 altsd = get_iface_desc(alts);
202 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
203 return -EINVAL;
204
205 if (fmt == subs->cur_audiofmt)
206 return 0;
207
208 /* close the old interface */
209 if (subs->interface >= 0 && subs->interface != fmt->iface) {
210 if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
211 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
212 dev->devnum, fmt->iface, fmt->altsetting);
213 return -EIO;
214 }
215 subs->interface = -1;
e11b4e0e 216 subs->altset_idx = 0;
e5779998
DM		 217 }
218
219 /* set interface */
e11b4e0e 220 if (subs->interface != fmt->iface || subs->altset_idx != fmt->altset_idx) {
e5779998
DM		 221 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
222 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
223 dev->devnum, fmt->iface, fmt->altsetting);
224 return -EIO;
225 }
226 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
227 subs->interface = fmt->iface;
e11b4e0e 228 subs->altset_idx = fmt->altset_idx;
e5779998
DM		 229 }
230
231 /* create a data pipe */
232 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
233 if (is_playback)
234 subs->datapipe = usb_sndisocpipe(dev, ep);
235 else
236 subs->datapipe = usb_rcvisocpipe(dev, ep);
237 subs->datainterval = fmt->datainterval;
238 subs->syncpipe = subs->syncinterval = 0;
239 subs->maxpacksize = fmt->maxpacksize;
89e1e66d 240 subs->syncmaxsize = 0;
e5779998
DM		 241 subs->fill_max = 0;
242
243 /* we need a sync pipe in async OUT or adaptive IN mode */
244 /* check the number of EP, since some devices have broken
245 * descriptors which fool us. if it has only one EP,
246 * assume it as adaptive-out or sync-in.
247 */
248 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
249 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
250 (! is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
251 altsd->bNumEndpoints >= 2) {
252 /* check sync-pipe endpoint */
253 /* ... and check descriptor size before accessing bSynchAddress
254 because there is a version of the SB Audigy 2 NX firmware lacking
255 the audio fields in the endpoint descriptors */
256 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
257 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
258 get_endpoint(alts, 1)->bSynchAddress != 0)) {
259 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
260 dev->devnum, fmt->iface, fmt->altsetting);
261 return -EINVAL;
262 }
263 ep = get_endpoint(alts, 1)->bEndpointAddress;
264 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
265 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
266 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
267 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
268 dev->devnum, fmt->iface, fmt->altsetting);
269 return -EINVAL;
270 }
271 ep &= USB_ENDPOINT_NUMBER_MASK;
272 if (is_playback)
273 subs->syncpipe = usb_rcvisocpipe(dev, ep);
274 else
275 subs->syncpipe = usb_sndisocpipe(dev, ep);
276 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
277 get_endpoint(alts, 1)->bRefresh >= 1 &&
278 get_endpoint(alts, 1)->bRefresh <= 9)
279 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
280 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
281 subs->syncinterval = 1;
282 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
283 get_endpoint(alts, 1)->bInterval <= 16)
284 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
285 else
286 subs->syncinterval = 3;
89e1e66d 287 subs->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize);
e5779998
DM		 288 }
289
290 /* always fill max packet size */
291 if (fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX)
292 subs->fill_max = 1;
293
767d75ad 294 if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0)
e5779998
DM		 295 return err;
296
297 subs->cur_audiofmt = fmt;
298
299 snd_usb_set_format_quirk(subs, fmt);
300
301#if 0
302 printk(KERN_DEBUG
303 "setting done: format = %d, rate = %d..%d, channels = %d\n",
304 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
305 printk(KERN_DEBUG
306 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
307 subs->datapipe, subs->syncpipe);
308#endif
309
310 return 0;
311}
312
313/*
314 * hw_params callback
315 *
316 * allocate a buffer and set the given audio format.
317 *
318 * so far we use a physically linear buffer although packetize transfer
319 * doesn't need a continuous area.
320 * if sg buffer is supported on the later version of alsa, we'll follow
321 * that.
322 */
323static int snd_usb_hw_params(struct snd_pcm_substream *substream,
324 struct snd_pcm_hw_params *hw_params)
325{
326 struct snd_usb_substream *subs = substream->runtime->private_data;
327 struct audioformat *fmt;
328 unsigned int channels, rate, format;
329 int ret, changed;
330
331 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
332 params_buffer_bytes(hw_params));
333 if (ret < 0)
334 return ret;
335
336 format = params_format(hw_params);
337 rate = params_rate(hw_params);
338 channels = params_channels(hw_params);
339 fmt = find_format(subs, format, rate, channels);
340 if (!fmt) {
341 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
342 format, rate, channels);
343 return -EINVAL;
344 }
345
346 changed = subs->cur_audiofmt != fmt ||
347 subs->period_bytes != params_period_bytes(hw_params) ||
348 subs->cur_rate != rate;
349 if ((ret = set_format(subs, fmt)) < 0)
350 return ret;
351
352 if (subs->cur_rate != rate) {
353 struct usb_host_interface *alts;
354 struct usb_interface *iface;
355 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
356 alts = &iface->altsetting[fmt->altset_idx];
767d75ad 357 ret = snd_usb_init_sample_rate(subs->stream->chip, subs->interface, alts, fmt, rate);
e5779998
DM		 358 if (ret < 0)
359 return ret;
360 subs->cur_rate = rate;
361 }
362
363 if (changed) {
382225e6 364 mutex_lock(&subs->stream->chip->shutdown_mutex);
e5779998
DM		 365 /* format changed */
366 snd_usb_release_substream_urbs(subs, 0);
367 /* influenced: period_bytes, channels, rate, format, */
368 ret = snd_usb_init_substream_urbs(subs, params_period_bytes(hw_params),
369 params_rate(hw_params),
370 snd_pcm_format_physical_width(params_format(hw_params)) *
371 params_channels(hw_params));
382225e6 372 mutex_unlock(&subs->stream->chip->shutdown_mutex);
e5779998
DM		 373 }
374
375 return ret;
376}
377
378/*
379 * hw_free callback
380 *
381 * reset the audio format and release the buffer
382 */
383static int snd_usb_hw_free(struct snd_pcm_substream *substream)
384{
385 struct snd_usb_substream *subs = substream->runtime->private_data;
386
387 subs->cur_audiofmt = NULL;
388 subs->cur_rate = 0;
389 subs->period_bytes = 0;
382225e6
TI		 390 mutex_lock(&subs->stream->chip->shutdown_mutex);
391 snd_usb_release_substream_urbs(subs, 0);
392 mutex_unlock(&subs->stream->chip->shutdown_mutex);
e5779998
DM		 393 return snd_pcm_lib_free_vmalloc_buffer(substream);
394}
395
396/*
397 * prepare callback
398 *
399 * only a few subtle things...
400 */
401static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
402{
403 struct snd_pcm_runtime *runtime = substream->runtime;
404 struct snd_usb_substream *subs = runtime->private_data;
405
406 if (! subs->cur_audiofmt) {
407 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
408 return -ENXIO;
409 }
410
411 /* some unit conversions in runtime */
412 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
413 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
414
415 /* reset the pointer */
416 subs->hwptr_done = 0;
417 subs->transfer_done = 0;
418 subs->phase = 0;
419 runtime->delay = 0;
420
421 return snd_usb_substream_prepare(subs, runtime);
422}
423
424static struct snd_pcm_hardware snd_usb_hardware =
425{
426 .info = SNDRV_PCM_INFO_MMAP |
427 SNDRV_PCM_INFO_MMAP_VALID |
428 SNDRV_PCM_INFO_BATCH |
429 SNDRV_PCM_INFO_INTERLEAVED |
430 SNDRV_PCM_INFO_BLOCK_TRANSFER |
431 SNDRV_PCM_INFO_PAUSE,
432 .buffer_bytes_max = 1024 * 1024,
433 .period_bytes_min = 64,
434 .period_bytes_max = 512 * 1024,
435 .periods_min = 2,
436 .periods_max = 1024,
437};
438
439static int hw_check_valid_format(struct snd_usb_substream *subs,
440 struct snd_pcm_hw_params *params,
441 struct audioformat *fp)
442{
443 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
444 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
445 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
446 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
015eb0b0 447 struct snd_mask check_fmts;
e5779998
DM		 448 unsigned int ptime;
449
450 /* check the format */
015eb0b0
CL		 451 snd_mask_none(&check_fmts);
452 check_fmts.bits[0] = (u32)fp->formats;
453 check_fmts.bits[1] = (u32)(fp->formats >> 32);
454 snd_mask_intersect(&check_fmts, fmts);
455 if (snd_mask_empty(&check_fmts)) {
e5779998
DM		 456 hwc_debug(" > check: no supported format %d\n", fp->format);
457 return 0;
458 }
459 /* check the channels */
460 if (fp->channels < ct->min || fp->channels > ct->max) {
461 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
462 return 0;
463 }
464 /* check the rate is within the range */
465 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
466 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
467 return 0;
468 }
469 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
470 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
471 return 0;
472 }
473 /* check whether the period time is >= the data packet interval */
4f4e8f69 474 if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) {
e5779998
DM		 475 ptime = 125 * (1 << fp->datainterval);
476 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
477 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
478 return 0;
479 }
480 }
481 return 1;
482}
483
484static int hw_rule_rate(struct snd_pcm_hw_params *params,
485 struct snd_pcm_hw_rule *rule)
486{
487 struct snd_usb_substream *subs = rule->private;
488 struct list_head *p;
489 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
490 unsigned int rmin, rmax;
491 int changed;
492
493 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
494 changed = 0;
495 rmin = rmax = 0;
496 list_for_each(p, &subs->fmt_list) {
497 struct audioformat *fp;
498 fp = list_entry(p, struct audioformat, list);
499 if (!hw_check_valid_format(subs, params, fp))
500 continue;
501 if (changed++) {
502 if (rmin > fp->rate_min)
503 rmin = fp->rate_min;
504 if (rmax < fp->rate_max)
505 rmax = fp->rate_max;
506 } else {
507 rmin = fp->rate_min;
508 rmax = fp->rate_max;
509 }
510 }
511
512 if (!changed) {
513 hwc_debug(" --> get empty\n");
514 it->empty = 1;
515 return -EINVAL;
516 }
517
518 changed = 0;
519 if (it->min < rmin) {
520 it->min = rmin;
521 it->openmin = 0;
522 changed = 1;
523 }
524 if (it->max > rmax) {
525 it->max = rmax;
526 it->openmax = 0;
527 changed = 1;
528 }
529 if (snd_interval_checkempty(it)) {
530 it->empty = 1;
531 return -EINVAL;
532 }
533 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
534 return changed;
535}
536
537
538static int hw_rule_channels(struct snd_pcm_hw_params *params,
539 struct snd_pcm_hw_rule *rule)
540{
541 struct snd_usb_substream *subs = rule->private;
542 struct list_head *p;
543 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
544 unsigned int rmin, rmax;
545 int changed;
546
547 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
548 changed = 0;
549 rmin = rmax = 0;
550 list_for_each(p, &subs->fmt_list) {
551 struct audioformat *fp;
552 fp = list_entry(p, struct audioformat, list);
553 if (!hw_check_valid_format(subs, params, fp))
554 continue;
555 if (changed++) {
556 if (rmin > fp->channels)
557 rmin = fp->channels;
558 if (rmax < fp->channels)
559 rmax = fp->channels;
560 } else {
561 rmin = fp->channels;
562 rmax = fp->channels;
563 }
564 }
565
566 if (!changed) {
567 hwc_debug(" --> get empty\n");
568 it->empty = 1;
569 return -EINVAL;
570 }
571
572 changed = 0;
573 if (it->min < rmin) {
574 it->min = rmin;
575 it->openmin = 0;
576 changed = 1;
577 }
578 if (it->max > rmax) {
579 it->max = rmax;
580 it->openmax = 0;
581 changed = 1;
582 }
583 if (snd_interval_checkempty(it)) {
584 it->empty = 1;
585 return -EINVAL;
586 }
587 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
588 return changed;
589}
590
591static int hw_rule_format(struct snd_pcm_hw_params *params,
592 struct snd_pcm_hw_rule *rule)
593{
594 struct snd_usb_substream *subs = rule->private;
595 struct list_head *p;
596 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
597 u64 fbits;
598 u32 oldbits[2];
599 int changed;
600
601 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
602 fbits = 0;
603 list_for_each(p, &subs->fmt_list) {
604 struct audioformat *fp;
605 fp = list_entry(p, struct audioformat, list);
606 if (!hw_check_valid_format(subs, params, fp))
607 continue;
015eb0b0 608 fbits |= fp->formats;
e5779998
DM		 609 }
610
611 oldbits[0] = fmt->bits[0];
612 oldbits[1] = fmt->bits[1];
613 fmt->bits[0] &= (u32)fbits;
614 fmt->bits[1] &= (u32)(fbits >> 32);
615 if (!fmt->bits[0] && !fmt->bits[1]) {
616 hwc_debug(" --> get empty\n");
617 return -EINVAL;
618 }
619 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
620 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
621 return changed;
622}
623
624static int hw_rule_period_time(struct snd_pcm_hw_params *params,
625 struct snd_pcm_hw_rule *rule)
626{
627 struct snd_usb_substream *subs = rule->private;
628 struct audioformat *fp;
629 struct snd_interval *it;
630 unsigned char min_datainterval;
631 unsigned int pmin;
632 int changed;
633
634 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
635 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
636 min_datainterval = 0xff;
637 list_for_each_entry(fp, &subs->fmt_list, list) {
638 if (!hw_check_valid_format(subs, params, fp))
639 continue;
640 min_datainterval = min(min_datainterval, fp->datainterval);
641 }
642 if (min_datainterval == 0xff) {
a7ce2e0d 643 hwc_debug(" --> get empty\n");
e5779998
DM		 644 it->empty = 1;
645 return -EINVAL;
646 }
647 pmin = 125 * (1 << min_datainterval);
648 changed = 0;
649 if (it->min < pmin) {
650 it->min = pmin;
651 it->openmin = 0;
652 changed = 1;
653 }
654 if (snd_interval_checkempty(it)) {
655 it->empty = 1;
656 return -EINVAL;
657 }
658 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
659 return changed;
660}
661
662/*
663 * If the device supports unusual bit rates, does the request meet these?
664 */
665static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
666 struct snd_usb_substream *subs)
667{
668 struct audioformat *fp;
669 int count = 0, needs_knot = 0;
670 int err;
671
672 list_for_each_entry(fp, &subs->fmt_list, list) {
673 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
674 return 0;
675 count += fp->nr_rates;
676 if (fp->rates & SNDRV_PCM_RATE_KNOT)
677 needs_knot = 1;
678 }
679 if (!needs_knot)
680 return 0;
681
e5779998 682 subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
8a8d56b2
JJ		 683 if (!subs->rate_list.list)
684 return -ENOMEM;
685 subs->rate_list.count = count;
e5779998
DM		 686 subs->rate_list.mask = 0;
687 count = 0;
688 list_for_each_entry(fp, &subs->fmt_list, list) {
689 int i;
690 for (i = 0; i < fp->nr_rates; i++)
691 subs->rate_list.list[count++] = fp->rate_table[i];
692 }
693 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
694 &subs->rate_list);
695 if (err < 0)
696 return err;
697
698 return 0;
699}
700
701
702/*
703 * set up the runtime hardware information.
704 */
705
706static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
707{
708 struct list_head *p;
709 unsigned int pt, ptmin;
710 int param_period_time_if_needed;
711 int err;
712
713 runtime->hw.formats = subs->formats;
714
715 runtime->hw.rate_min = 0x7fffffff;
716 runtime->hw.rate_max = 0;
717 runtime->hw.channels_min = 256;
718 runtime->hw.channels_max = 0;
719 runtime->hw.rates = 0;
720 ptmin = UINT_MAX;
721 /* check min/max rates and channels */
722 list_for_each(p, &subs->fmt_list) {
723 struct audioformat *fp;
724 fp = list_entry(p, struct audioformat, list);
725 runtime->hw.rates |= fp->rates;
726 if (runtime->hw.rate_min > fp->rate_min)
727 runtime->hw.rate_min = fp->rate_min;
728 if (runtime->hw.rate_max < fp->rate_max)
729 runtime->hw.rate_max = fp->rate_max;
730 if (runtime->hw.channels_min > fp->channels)
731 runtime->hw.channels_min = fp->channels;
732 if (runtime->hw.channels_max < fp->channels)
733 runtime->hw.channels_max = fp->channels;
734 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
735 /* FIXME: there might be more than one audio formats... */
736 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
737 fp->frame_size;
738 }
739 pt = 125 * (1 << fp->datainterval);
740 ptmin = min(ptmin, pt);
741 }
742
743 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
4f4e8f69 744 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
e5779998
DM		 745 /* full speed devices have fixed data packet interval */
746 ptmin = 1000;
747 if (ptmin == 1000)
748 /* if period time doesn't go below 1 ms, no rules needed */
749 param_period_time_if_needed = -1;
750 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
751 ptmin, UINT_MAX);
752
753 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
754 hw_rule_rate, subs,
755 SNDRV_PCM_HW_PARAM_FORMAT,
756 SNDRV_PCM_HW_PARAM_CHANNELS,
757 param_period_time_if_needed,
758 -1)) < 0)
759 return err;
760 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
761 hw_rule_channels, subs,
762 SNDRV_PCM_HW_PARAM_FORMAT,
763 SNDRV_PCM_HW_PARAM_RATE,
764 param_period_time_if_needed,
765 -1)) < 0)
766 return err;
767 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
768 hw_rule_format, subs,
769 SNDRV_PCM_HW_PARAM_RATE,
770 SNDRV_PCM_HW_PARAM_CHANNELS,
771 param_period_time_if_needed,
772 -1)) < 0)
773 return err;
774 if (param_period_time_if_needed >= 0) {
775 err = snd_pcm_hw_rule_add(runtime, 0,
776 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
777 hw_rule_period_time, subs,
778 SNDRV_PCM_HW_PARAM_FORMAT,
779 SNDRV_PCM_HW_PARAM_CHANNELS,
780 SNDRV_PCM_HW_PARAM_RATE,
781 -1);
782 if (err < 0)
783 return err;
784 }
785 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
786 return err;
787 return 0;
788}
789
790static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
791{
792 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
793 struct snd_pcm_runtime *runtime = substream->runtime;
794 struct snd_usb_substream *subs = &as->substream[direction];
795
796 subs->interface = -1;
e11b4e0e 797 subs->altset_idx = 0;
e5779998
DM		 798 runtime->hw = snd_usb_hardware;
799 runtime->private_data = subs;
800 subs->pcm_substream = substream;
801 return setup_hw_info(runtime, subs);
802}
803
804static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
805{
806 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
807 struct snd_usb_substream *subs = &as->substream[direction];
808
809 if (!as->chip->shutdown && subs->interface >= 0) {
810 usb_set_interface(subs->dev, subs->interface, 0);
811 subs->interface = -1;
812 }
813 subs->pcm_substream = NULL;
814 return 0;
815}
816
817static int snd_usb_playback_open(struct snd_pcm_substream *substream)
818{
819 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
820}
821
822static int snd_usb_playback_close(struct snd_pcm_substream *substream)
823{
824 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
825}
826
827static int snd_usb_capture_open(struct snd_pcm_substream *substream)
828{
829 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
830}
831
832static int snd_usb_capture_close(struct snd_pcm_substream *substream)
833{
834 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
835}
836
837static struct snd_pcm_ops snd_usb_playback_ops = {
838 .open = snd_usb_playback_open,
839 .close = snd_usb_playback_close,
840 .ioctl = snd_pcm_lib_ioctl,
841 .hw_params = snd_usb_hw_params,
842 .hw_free = snd_usb_hw_free,
843 .prepare = snd_usb_pcm_prepare,
844 .trigger = snd_usb_substream_playback_trigger,
845 .pointer = snd_usb_pcm_pointer,
846 .page = snd_pcm_lib_get_vmalloc_page,
847 .mmap = snd_pcm_lib_mmap_vmalloc,
848};
849
850static struct snd_pcm_ops snd_usb_capture_ops = {
851 .open = snd_usb_capture_open,
852 .close = snd_usb_capture_close,
853 .ioctl = snd_pcm_lib_ioctl,
854 .hw_params = snd_usb_hw_params,
855 .hw_free = snd_usb_hw_free,
856 .prepare = snd_usb_pcm_prepare,
857 .trigger = snd_usb_substream_capture_trigger,
858 .pointer = snd_usb_pcm_pointer,
859 .page = snd_pcm_lib_get_vmalloc_page,
860 .mmap = snd_pcm_lib_mmap_vmalloc,
861};
862
863void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
864{
865 snd_pcm_set_ops(pcm, stream,
866 stream == SNDRV_PCM_STREAM_PLAYBACK ?
867 &snd_usb_playback_ops : &snd_usb_capture_ops);
868}
Linux kernel - Deliverables
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