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Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6
[net-next-2.6.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;
240 subs->fill_max = 0;
241
242 /* we need a sync pipe in async OUT or adaptive IN mode */
243 /* check the number of EP, since some devices have broken
244 * descriptors which fool us. if it has only one EP,
245 * assume it as adaptive-out or sync-in.
246 */
247 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
248 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
249 (! is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
250 altsd->bNumEndpoints >= 2) {
251 /* check sync-pipe endpoint */
252 /* ... and check descriptor size before accessing bSynchAddress
253 because there is a version of the SB Audigy 2 NX firmware lacking
254 the audio fields in the endpoint descriptors */
255 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
256 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
257 get_endpoint(alts, 1)->bSynchAddress != 0)) {
258 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
259 dev->devnum, fmt->iface, fmt->altsetting);
260 return -EINVAL;
261 }
262 ep = get_endpoint(alts, 1)->bEndpointAddress;
263 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
264 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
265 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
266 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
267 dev->devnum, fmt->iface, fmt->altsetting);
268 return -EINVAL;
269 }
270 ep &= USB_ENDPOINT_NUMBER_MASK;
271 if (is_playback)
272 subs->syncpipe = usb_rcvisocpipe(dev, ep);
273 else
274 subs->syncpipe = usb_sndisocpipe(dev, ep);
275 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
276 get_endpoint(alts, 1)->bRefresh >= 1 &&
277 get_endpoint(alts, 1)->bRefresh <= 9)
278 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
279 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
280 subs->syncinterval = 1;
281 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
282 get_endpoint(alts, 1)->bInterval <= 16)
283 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
284 else
285 subs->syncinterval = 3;
286 }
287
288 /* always fill max packet size */
289 if (fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX)
290 subs->fill_max = 1;
291
767d75ad 292 if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0)
e5779998
DM		 293 return err;
294
295 subs->cur_audiofmt = fmt;
296
297 snd_usb_set_format_quirk(subs, fmt);
298
299#if 0
300 printk(KERN_DEBUG
301 "setting done: format = %d, rate = %d..%d, channels = %d\n",
302 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
303 printk(KERN_DEBUG
304 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
305 subs->datapipe, subs->syncpipe);
306#endif
307
308 return 0;
309}
310
311/*
312 * hw_params callback
313 *
314 * allocate a buffer and set the given audio format.
315 *
316 * so far we use a physically linear buffer although packetize transfer
317 * doesn't need a continuous area.
318 * if sg buffer is supported on the later version of alsa, we'll follow
319 * that.
320 */
321static int snd_usb_hw_params(struct snd_pcm_substream *substream,
322 struct snd_pcm_hw_params *hw_params)
323{
324 struct snd_usb_substream *subs = substream->runtime->private_data;
325 struct audioformat *fmt;
326 unsigned int channels, rate, format;
327 int ret, changed;
328
329 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
330 params_buffer_bytes(hw_params));
331 if (ret < 0)
332 return ret;
333
334 format = params_format(hw_params);
335 rate = params_rate(hw_params);
336 channels = params_channels(hw_params);
337 fmt = find_format(subs, format, rate, channels);
338 if (!fmt) {
339 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
340 format, rate, channels);
341 return -EINVAL;
342 }
343
344 changed = subs->cur_audiofmt != fmt ||
345 subs->period_bytes != params_period_bytes(hw_params) ||
346 subs->cur_rate != rate;
347 if ((ret = set_format(subs, fmt)) < 0)
348 return ret;
349
350 if (subs->cur_rate != rate) {
351 struct usb_host_interface *alts;
352 struct usb_interface *iface;
353 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
354 alts = &iface->altsetting[fmt->altset_idx];
767d75ad 355 ret = snd_usb_init_sample_rate(subs->stream->chip, subs->interface, alts, fmt, rate);
e5779998
DM		 356 if (ret < 0)
357 return ret;
358 subs->cur_rate = rate;
359 }
360
361 if (changed) {
362 /* format changed */
363 snd_usb_release_substream_urbs(subs, 0);
364 /* influenced: period_bytes, channels, rate, format, */
365 ret = snd_usb_init_substream_urbs(subs, params_period_bytes(hw_params),
366 params_rate(hw_params),
367 snd_pcm_format_physical_width(params_format(hw_params)) *
368 params_channels(hw_params));
369 }
370
371 return ret;
372}
373
374/*
375 * hw_free callback
376 *
377 * reset the audio format and release the buffer
378 */
379static int snd_usb_hw_free(struct snd_pcm_substream *substream)
380{
381 struct snd_usb_substream *subs = substream->runtime->private_data;
382
383 subs->cur_audiofmt = NULL;
384 subs->cur_rate = 0;
385 subs->period_bytes = 0;
386 if (!subs->stream->chip->shutdown)
387 snd_usb_release_substream_urbs(subs, 0);
388 return snd_pcm_lib_free_vmalloc_buffer(substream);
389}
390
391/*
392 * prepare callback
393 *
394 * only a few subtle things...
395 */
396static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
397{
398 struct snd_pcm_runtime *runtime = substream->runtime;
399 struct snd_usb_substream *subs = runtime->private_data;
400
401 if (! subs->cur_audiofmt) {
402 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
403 return -ENXIO;
404 }
405
406 /* some unit conversions in runtime */
407 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
408 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
409
410 /* reset the pointer */
411 subs->hwptr_done = 0;
412 subs->transfer_done = 0;
413 subs->phase = 0;
414 runtime->delay = 0;
415
416 return snd_usb_substream_prepare(subs, runtime);
417}
418
419static struct snd_pcm_hardware snd_usb_hardware =
420{
421 .info = SNDRV_PCM_INFO_MMAP |
422 SNDRV_PCM_INFO_MMAP_VALID |
423 SNDRV_PCM_INFO_BATCH |
424 SNDRV_PCM_INFO_INTERLEAVED |
425 SNDRV_PCM_INFO_BLOCK_TRANSFER |
426 SNDRV_PCM_INFO_PAUSE,
427 .buffer_bytes_max = 1024 * 1024,
428 .period_bytes_min = 64,
429 .period_bytes_max = 512 * 1024,
430 .periods_min = 2,
431 .periods_max = 1024,
432};
433
434static int hw_check_valid_format(struct snd_usb_substream *subs,
435 struct snd_pcm_hw_params *params,
436 struct audioformat *fp)
437{
438 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
439 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
440 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
441 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
015eb0b0 442 struct snd_mask check_fmts;
e5779998
DM		 443 unsigned int ptime;
444
445 /* check the format */
015eb0b0
CL		 446 snd_mask_none(&check_fmts);
447 check_fmts.bits[0] = (u32)fp->formats;
448 check_fmts.bits[1] = (u32)(fp->formats >> 32);
449 snd_mask_intersect(&check_fmts, fmts);
450 if (snd_mask_empty(&check_fmts)) {
e5779998
DM		 451 hwc_debug(" > check: no supported format %d\n", fp->format);
452 return 0;
453 }
454 /* check the channels */
455 if (fp->channels < ct->min || fp->channels > ct->max) {
456 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
457 return 0;
458 }
459 /* check the rate is within the range */
460 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
461 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
462 return 0;
463 }
464 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
465 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
466 return 0;
467 }
468 /* check whether the period time is >= the data packet interval */
469 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) {
470 ptime = 125 * (1 << fp->datainterval);
471 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
472 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
473 return 0;
474 }
475 }
476 return 1;
477}
478
479static int hw_rule_rate(struct snd_pcm_hw_params *params,
480 struct snd_pcm_hw_rule *rule)
481{
482 struct snd_usb_substream *subs = rule->private;
483 struct list_head *p;
484 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
485 unsigned int rmin, rmax;
486 int changed;
487
488 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
489 changed = 0;
490 rmin = rmax = 0;
491 list_for_each(p, &subs->fmt_list) {
492 struct audioformat *fp;
493 fp = list_entry(p, struct audioformat, list);
494 if (!hw_check_valid_format(subs, params, fp))
495 continue;
496 if (changed++) {
497 if (rmin > fp->rate_min)
498 rmin = fp->rate_min;
499 if (rmax < fp->rate_max)
500 rmax = fp->rate_max;
501 } else {
502 rmin = fp->rate_min;
503 rmax = fp->rate_max;
504 }
505 }
506
507 if (!changed) {
508 hwc_debug(" --> get empty\n");
509 it->empty = 1;
510 return -EINVAL;
511 }
512
513 changed = 0;
514 if (it->min < rmin) {
515 it->min = rmin;
516 it->openmin = 0;
517 changed = 1;
518 }
519 if (it->max > rmax) {
520 it->max = rmax;
521 it->openmax = 0;
522 changed = 1;
523 }
524 if (snd_interval_checkempty(it)) {
525 it->empty = 1;
526 return -EINVAL;
527 }
528 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
529 return changed;
530}
531
532
533static int hw_rule_channels(struct snd_pcm_hw_params *params,
534 struct snd_pcm_hw_rule *rule)
535{
536 struct snd_usb_substream *subs = rule->private;
537 struct list_head *p;
538 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
539 unsigned int rmin, rmax;
540 int changed;
541
542 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
543 changed = 0;
544 rmin = rmax = 0;
545 list_for_each(p, &subs->fmt_list) {
546 struct audioformat *fp;
547 fp = list_entry(p, struct audioformat, list);
548 if (!hw_check_valid_format(subs, params, fp))
549 continue;
550 if (changed++) {
551 if (rmin > fp->channels)
552 rmin = fp->channels;
553 if (rmax < fp->channels)
554 rmax = fp->channels;
555 } else {
556 rmin = fp->channels;
557 rmax = fp->channels;
558 }
559 }
560
561 if (!changed) {
562 hwc_debug(" --> get empty\n");
563 it->empty = 1;
564 return -EINVAL;
565 }
566
567 changed = 0;
568 if (it->min < rmin) {
569 it->min = rmin;
570 it->openmin = 0;
571 changed = 1;
572 }
573 if (it->max > rmax) {
574 it->max = rmax;
575 it->openmax = 0;
576 changed = 1;
577 }
578 if (snd_interval_checkempty(it)) {
579 it->empty = 1;
580 return -EINVAL;
581 }
582 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
583 return changed;
584}
585
586static int hw_rule_format(struct snd_pcm_hw_params *params,
587 struct snd_pcm_hw_rule *rule)
588{
589 struct snd_usb_substream *subs = rule->private;
590 struct list_head *p;
591 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
592 u64 fbits;
593 u32 oldbits[2];
594 int changed;
595
596 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
597 fbits = 0;
598 list_for_each(p, &subs->fmt_list) {
599 struct audioformat *fp;
600 fp = list_entry(p, struct audioformat, list);
601 if (!hw_check_valid_format(subs, params, fp))
602 continue;
015eb0b0 603 fbits |= fp->formats;
e5779998
DM		 604 }
605
606 oldbits[0] = fmt->bits[0];
607 oldbits[1] = fmt->bits[1];
608 fmt->bits[0] &= (u32)fbits;
609 fmt->bits[1] &= (u32)(fbits >> 32);
610 if (!fmt->bits[0] && !fmt->bits[1]) {
611 hwc_debug(" --> get empty\n");
612 return -EINVAL;
613 }
614 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
615 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
616 return changed;
617}
618
619static int hw_rule_period_time(struct snd_pcm_hw_params *params,
620 struct snd_pcm_hw_rule *rule)
621{
622 struct snd_usb_substream *subs = rule->private;
623 struct audioformat *fp;
624 struct snd_interval *it;
625 unsigned char min_datainterval;
626 unsigned int pmin;
627 int changed;
628
629 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
630 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
631 min_datainterval = 0xff;
632 list_for_each_entry(fp, &subs->fmt_list, list) {
633 if (!hw_check_valid_format(subs, params, fp))
634 continue;
635 min_datainterval = min(min_datainterval, fp->datainterval);
636 }
637 if (min_datainterval == 0xff) {
a7ce2e0d 638 hwc_debug(" --> get empty\n");
e5779998
DM		 639 it->empty = 1;
640 return -EINVAL;
641 }
642 pmin = 125 * (1 << min_datainterval);
643 changed = 0;
644 if (it->min < pmin) {
645 it->min = pmin;
646 it->openmin = 0;
647 changed = 1;
648 }
649 if (snd_interval_checkempty(it)) {
650 it->empty = 1;
651 return -EINVAL;
652 }
653 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
654 return changed;
655}
656
657/*
658 * If the device supports unusual bit rates, does the request meet these?
659 */
660static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
661 struct snd_usb_substream *subs)
662{
663 struct audioformat *fp;
664 int count = 0, needs_knot = 0;
665 int err;
666
667 list_for_each_entry(fp, &subs->fmt_list, list) {
668 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
669 return 0;
670 count += fp->nr_rates;
671 if (fp->rates & SNDRV_PCM_RATE_KNOT)
672 needs_knot = 1;
673 }
674 if (!needs_knot)
675 return 0;
676
677 subs->rate_list.count = count;
678 subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
679 subs->rate_list.mask = 0;
680 count = 0;
681 list_for_each_entry(fp, &subs->fmt_list, list) {
682 int i;
683 for (i = 0; i < fp->nr_rates; i++)
684 subs->rate_list.list[count++] = fp->rate_table[i];
685 }
686 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
687 &subs->rate_list);
688 if (err < 0)
689 return err;
690
691 return 0;
692}
693
694
695/*
696 * set up the runtime hardware information.
697 */
698
699static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
700{
701 struct list_head *p;
702 unsigned int pt, ptmin;
703 int param_period_time_if_needed;
704 int err;
705
706 runtime->hw.formats = subs->formats;
707
708 runtime->hw.rate_min = 0x7fffffff;
709 runtime->hw.rate_max = 0;
710 runtime->hw.channels_min = 256;
711 runtime->hw.channels_max = 0;
712 runtime->hw.rates = 0;
713 ptmin = UINT_MAX;
714 /* check min/max rates and channels */
715 list_for_each(p, &subs->fmt_list) {
716 struct audioformat *fp;
717 fp = list_entry(p, struct audioformat, list);
718 runtime->hw.rates |= fp->rates;
719 if (runtime->hw.rate_min > fp->rate_min)
720 runtime->hw.rate_min = fp->rate_min;
721 if (runtime->hw.rate_max < fp->rate_max)
722 runtime->hw.rate_max = fp->rate_max;
723 if (runtime->hw.channels_min > fp->channels)
724 runtime->hw.channels_min = fp->channels;
725 if (runtime->hw.channels_max < fp->channels)
726 runtime->hw.channels_max = fp->channels;
727 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
728 /* FIXME: there might be more than one audio formats... */
729 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
730 fp->frame_size;
731 }
732 pt = 125 * (1 << fp->datainterval);
733 ptmin = min(ptmin, pt);
734 }
735
736 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
737 if (snd_usb_get_speed(subs->dev) != USB_SPEED_HIGH)
738 /* full speed devices have fixed data packet interval */
739 ptmin = 1000;
740 if (ptmin == 1000)
741 /* if period time doesn't go below 1 ms, no rules needed */
742 param_period_time_if_needed = -1;
743 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
744 ptmin, UINT_MAX);
745
746 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
747 hw_rule_rate, subs,
748 SNDRV_PCM_HW_PARAM_FORMAT,
749 SNDRV_PCM_HW_PARAM_CHANNELS,
750 param_period_time_if_needed,
751 -1)) < 0)
752 return err;
753 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
754 hw_rule_channels, subs,
755 SNDRV_PCM_HW_PARAM_FORMAT,
756 SNDRV_PCM_HW_PARAM_RATE,
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_FORMAT,
761 hw_rule_format, subs,
762 SNDRV_PCM_HW_PARAM_RATE,
763 SNDRV_PCM_HW_PARAM_CHANNELS,
764 param_period_time_if_needed,
765 -1)) < 0)
766 return err;
767 if (param_period_time_if_needed >= 0) {
768 err = snd_pcm_hw_rule_add(runtime, 0,
769 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
770 hw_rule_period_time, subs,
771 SNDRV_PCM_HW_PARAM_FORMAT,
772 SNDRV_PCM_HW_PARAM_CHANNELS,
773 SNDRV_PCM_HW_PARAM_RATE,
774 -1);
775 if (err < 0)
776 return err;
777 }
778 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
779 return err;
780 return 0;
781}
782
783static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
784{
785 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
786 struct snd_pcm_runtime *runtime = substream->runtime;
787 struct snd_usb_substream *subs = &as->substream[direction];
788
789 subs->interface = -1;
e11b4e0e 790 subs->altset_idx = 0;
e5779998
DM		 791 runtime->hw = snd_usb_hardware;
792 runtime->private_data = subs;
793 subs->pcm_substream = substream;
794 return setup_hw_info(runtime, subs);
795}
796
797static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
798{
799 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
800 struct snd_usb_substream *subs = &as->substream[direction];
801
802 if (!as->chip->shutdown && subs->interface >= 0) {
803 usb_set_interface(subs->dev, subs->interface, 0);
804 subs->interface = -1;
805 }
806 subs->pcm_substream = NULL;
807 return 0;
808}
809
810static int snd_usb_playback_open(struct snd_pcm_substream *substream)
811{
812 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
813}
814
815static int snd_usb_playback_close(struct snd_pcm_substream *substream)
816{
817 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
818}
819
820static int snd_usb_capture_open(struct snd_pcm_substream *substream)
821{
822 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
823}
824
825static int snd_usb_capture_close(struct snd_pcm_substream *substream)
826{
827 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
828}
829
830static struct snd_pcm_ops snd_usb_playback_ops = {
831 .open = snd_usb_playback_open,
832 .close = snd_usb_playback_close,
833 .ioctl = snd_pcm_lib_ioctl,
834 .hw_params = snd_usb_hw_params,
835 .hw_free = snd_usb_hw_free,
836 .prepare = snd_usb_pcm_prepare,
837 .trigger = snd_usb_substream_playback_trigger,
838 .pointer = snd_usb_pcm_pointer,
839 .page = snd_pcm_lib_get_vmalloc_page,
840 .mmap = snd_pcm_lib_mmap_vmalloc,
841};
842
843static struct snd_pcm_ops snd_usb_capture_ops = {
844 .open = snd_usb_capture_open,
845 .close = snd_usb_capture_close,
846 .ioctl = snd_pcm_lib_ioctl,
847 .hw_params = snd_usb_hw_params,
848 .hw_free = snd_usb_hw_free,
849 .prepare = snd_usb_pcm_prepare,
850 .trigger = snd_usb_substream_capture_trigger,
851 .pointer = snd_usb_pcm_pointer,
852 .page = snd_pcm_lib_get_vmalloc_page,
853 .mmap = snd_pcm_lib_mmap_vmalloc,
854};
855
856void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
857{
858 snd_pcm_set_ops(pcm, stream,
859 stream == SNDRV_PCM_STREAM_PLAYBACK ?
860 &snd_usb_playback_ops : &snd_usb_capture_ops);
861}
Clone of davem's net-next-2.6 tree