2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 #include <linux/init.h>
18 #include <linux/slab.h>
19 #include <linux/ratelimit.h>
20 #include <linux/usb.h>
21 #include <linux/usb/audio.h>
22 #include <linux/usb/audio-v2.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
38 #define SUBSTREAM_FLAG_DATA_EP_STARTED 0
39 #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
41 /* return the estimated delay based on USB frame counters */
42 snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
45 int current_frame_number;
49 current_frame_number = usb_get_current_frame_number(subs->dev);
51 * HCD implementations use different widths, use lower 8 bits.
52 * The delay will be managed up to 256ms, which is more than
55 frame_diff = (current_frame_number - subs->last_frame_number) & 0xff;
57 /* Approximation based on number of samples per USB frame (ms),
58 some truncation for 44.1 but the estimate is good enough */
59 est_delay = subs->last_delay - (frame_diff * rate / 1000);
66 * return the current pcm pointer. just based on the hwptr_done value.
68 static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
70 struct snd_usb_substream *subs;
71 unsigned int hwptr_done;
73 subs = (struct snd_usb_substream *)substream->runtime->private_data;
74 spin_lock(&subs->lock);
75 hwptr_done = subs->hwptr_done;
76 substream->runtime->delay = snd_usb_pcm_delay(subs,
77 substream->runtime->rate);
78 spin_unlock(&subs->lock);
79 return hwptr_done / (substream->runtime->frame_bits >> 3);
83 * find a matching audio format
85 static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
86 unsigned int rate, unsigned int channels)
89 struct audioformat *found = NULL;
90 int cur_attr = 0, attr;
92 list_for_each(p, &subs->fmt_list) {
93 struct audioformat *fp;
94 fp = list_entry(p, struct audioformat, list);
95 if (!(fp->formats & (1uLL << format)))
97 if (fp->channels != channels)
99 if (rate < fp->rate_min || rate > fp->rate_max)
101 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
103 for (i = 0; i < fp->nr_rates; i++)
104 if (fp->rate_table[i] == rate)
106 if (i >= fp->nr_rates)
109 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
115 /* avoid async out and adaptive in if the other method
116 * supports the same format.
117 * this is a workaround for the case like
118 * M-audio audiophile USB.
120 if (attr != cur_attr) {
121 if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
122 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
123 (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
124 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
126 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
127 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
128 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
129 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
135 /* find the format with the largest max. packet size */
136 if (fp->maxpacksize > found->maxpacksize) {
144 static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
145 struct usb_host_interface *alts,
146 struct audioformat *fmt)
148 struct usb_device *dev = chip->dev;
150 unsigned char data[1];
153 ep = get_endpoint(alts, 0)->bEndpointAddress;
156 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
157 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
158 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
159 data, sizeof(data))) < 0) {
160 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
161 dev->devnum, iface, ep);
168 static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
169 struct usb_host_interface *alts,
170 struct audioformat *fmt)
172 struct usb_device *dev = chip->dev;
173 unsigned char data[1];
177 ep = get_endpoint(alts, 0)->bEndpointAddress;
180 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
181 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
182 UAC2_EP_CS_PITCH << 8, 0,
183 data, sizeof(data))) < 0) {
184 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2)\n",
185 dev->devnum, iface, fmt->altsetting);
193 * initialize the pitch control and sample rate
195 int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
196 struct usb_host_interface *alts,
197 struct audioformat *fmt)
199 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
201 /* if endpoint doesn't have pitch control, bail out */
202 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
205 switch (altsd->bInterfaceProtocol) {
208 return init_pitch_v1(chip, iface, alts, fmt);
211 return init_pitch_v2(chip, iface, alts, fmt);
215 static int start_endpoints(struct snd_usb_substream *subs)
219 if (!subs->data_endpoint)
222 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
223 struct snd_usb_endpoint *ep = subs->data_endpoint;
225 snd_printdd(KERN_DEBUG "Starting data EP @%p\n", ep);
227 ep->data_subs = subs;
228 err = snd_usb_endpoint_start(ep);
230 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
235 if (subs->sync_endpoint &&
236 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
237 struct snd_usb_endpoint *ep = subs->sync_endpoint;
239 snd_printdd(KERN_DEBUG "Starting sync EP @%p\n", ep);
241 ep->sync_slave = subs->data_endpoint;
242 err = snd_usb_endpoint_start(ep);
244 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
252 static void stop_endpoints(struct snd_usb_substream *subs,
253 int force, int can_sleep, int wait)
255 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
256 snd_usb_endpoint_stop(subs->sync_endpoint,
257 force, can_sleep, wait);
259 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
260 snd_usb_endpoint_stop(subs->data_endpoint,
261 force, can_sleep, wait);
264 static int deactivate_endpoints(struct snd_usb_substream *subs)
268 reta = snd_usb_endpoint_deactivate(subs->sync_endpoint);
269 retb = snd_usb_endpoint_deactivate(subs->data_endpoint);
281 * find a matching format and set up the interface
283 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
285 struct usb_device *dev = subs->dev;
286 struct usb_host_interface *alts;
287 struct usb_interface_descriptor *altsd;
288 struct usb_interface *iface;
289 unsigned int ep, attr;
290 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
291 int err, implicit_fb = 0;
293 iface = usb_ifnum_to_if(dev, fmt->iface);
296 alts = &iface->altsetting[fmt->altset_idx];
297 altsd = get_iface_desc(alts);
298 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
301 if (fmt == subs->cur_audiofmt)
304 /* close the old interface */
305 if (subs->interface >= 0 && subs->interface != fmt->iface) {
306 err = usb_set_interface(subs->dev, subs->interface, 0);
308 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed (%d)\n",
309 dev->devnum, fmt->iface, fmt->altsetting, err);
312 subs->interface = -1;
313 subs->altset_idx = 0;
317 if (subs->interface != fmt->iface ||
318 subs->altset_idx != fmt->altset_idx) {
319 err = usb_set_interface(dev, fmt->iface, fmt->altsetting);
321 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed (%d)\n",
322 dev->devnum, fmt->iface, fmt->altsetting, err);
325 snd_printdd(KERN_INFO "setting usb interface %d:%d\n",
326 fmt->iface, fmt->altsetting);
327 subs->interface = fmt->iface;
328 subs->altset_idx = fmt->altset_idx;
331 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
332 alts, fmt->endpoint, subs->direction,
333 SND_USB_ENDPOINT_TYPE_DATA);
334 if (!subs->data_endpoint)
337 /* we need a sync pipe in async OUT or adaptive IN mode */
338 /* check the number of EP, since some devices have broken
339 * descriptors which fool us. if it has only one EP,
340 * assume it as adaptive-out or sync-in.
342 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
344 switch (subs->stream->chip->usb_id) {
345 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
346 case USB_ID(0x0763, 0x2081):
350 iface = usb_ifnum_to_if(dev, 2);
352 if (!iface || iface->num_altsetting == 0)
355 alts = &iface->altsetting[1];
360 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
361 (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
362 altsd->bNumEndpoints >= 2) {
363 /* check sync-pipe endpoint */
364 /* ... and check descriptor size before accessing bSynchAddress
365 because there is a version of the SB Audigy 2 NX firmware lacking
366 the audio fields in the endpoint descriptors */
367 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
368 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
369 get_endpoint(alts, 1)->bSynchAddress != 0 &&
371 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
372 dev->devnum, fmt->iface, fmt->altsetting,
373 get_endpoint(alts, 1)->bmAttributes,
374 get_endpoint(alts, 1)->bLength,
375 get_endpoint(alts, 1)->bSynchAddress);
378 ep = get_endpoint(alts, 1)->bEndpointAddress;
380 get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
381 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
382 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
383 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
384 dev->devnum, fmt->iface, fmt->altsetting,
385 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
389 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
390 == USB_ENDPOINT_USAGE_IMPLICIT_FB;
393 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
394 alts, ep, !subs->direction,
396 SND_USB_ENDPOINT_TYPE_DATA :
397 SND_USB_ENDPOINT_TYPE_SYNC);
398 if (!subs->sync_endpoint)
401 subs->data_endpoint->sync_master = subs->sync_endpoint;
404 if ((err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt)) < 0)
407 subs->cur_audiofmt = fmt;
409 snd_usb_set_format_quirk(subs, fmt);
413 "setting done: format = %d, rate = %d..%d, channels = %d\n",
414 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
416 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
417 subs->datapipe, subs->syncpipe);
426 * allocate a buffer and set the given audio format.
428 * so far we use a physically linear buffer although packetize transfer
429 * doesn't need a continuous area.
430 * if sg buffer is supported on the later version of alsa, we'll follow
433 static int snd_usb_hw_params(struct snd_pcm_substream *substream,
434 struct snd_pcm_hw_params *hw_params)
436 struct snd_usb_substream *subs = substream->runtime->private_data;
437 struct audioformat *fmt;
438 unsigned int channels, rate, format;
441 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
442 params_buffer_bytes(hw_params));
446 format = params_format(hw_params);
447 rate = params_rate(hw_params);
448 channels = params_channels(hw_params);
449 fmt = find_format(subs, format, rate, channels);
451 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
452 format, rate, channels);
456 changed = subs->cur_audiofmt != fmt ||
457 subs->period_bytes != params_period_bytes(hw_params) ||
458 subs->cur_rate != rate;
459 if ((ret = set_format(subs, fmt)) < 0)
462 if (subs->cur_rate != rate) {
463 struct usb_host_interface *alts;
464 struct usb_interface *iface;
465 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
466 alts = &iface->altsetting[fmt->altset_idx];
467 ret = snd_usb_init_sample_rate(subs->stream->chip, fmt->iface, alts, fmt, rate);
470 subs->cur_rate = rate;
474 mutex_lock(&subs->stream->chip->shutdown_mutex);
476 stop_endpoints(subs, 0, 0, 0);
477 ret = snd_usb_endpoint_set_params(subs->data_endpoint, hw_params, fmt,
478 subs->sync_endpoint);
482 if (subs->sync_endpoint)
483 ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
484 hw_params, fmt, NULL);
486 mutex_unlock(&subs->stream->chip->shutdown_mutex);
490 subs->interface = fmt->iface;
491 subs->altset_idx = fmt->altset_idx;
500 * reset the audio format and release the buffer
502 static int snd_usb_hw_free(struct snd_pcm_substream *substream)
504 struct snd_usb_substream *subs = substream->runtime->private_data;
506 subs->cur_audiofmt = NULL;
508 subs->period_bytes = 0;
509 mutex_lock(&subs->stream->chip->shutdown_mutex);
510 stop_endpoints(subs, 0, 1, 1);
511 deactivate_endpoints(subs);
512 mutex_unlock(&subs->stream->chip->shutdown_mutex);
513 return snd_pcm_lib_free_vmalloc_buffer(substream);
519 * only a few subtle things...
521 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
523 struct snd_pcm_runtime *runtime = substream->runtime;
524 struct snd_usb_substream *subs = runtime->private_data;
526 if (! subs->cur_audiofmt) {
527 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
531 if (snd_BUG_ON(!subs->data_endpoint))
534 /* some unit conversions in runtime */
535 subs->data_endpoint->maxframesize =
536 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
537 subs->data_endpoint->curframesize =
538 bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
540 /* reset the pointer */
541 subs->hwptr_done = 0;
542 subs->transfer_done = 0;
543 subs->last_delay = 0;
544 subs->last_frame_number = 0;
547 /* clear the pending deactivation on the target EPs */
548 deactivate_endpoints(subs);
550 /* for playback, submit the URBs now; otherwise, the first hwptr_done
551 * updates for all URBs would happen at the same time when starting */
552 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
553 return start_endpoints(subs);
558 static struct snd_pcm_hardware snd_usb_hardware =
560 .info = SNDRV_PCM_INFO_MMAP |
561 SNDRV_PCM_INFO_MMAP_VALID |
562 SNDRV_PCM_INFO_BATCH |
563 SNDRV_PCM_INFO_INTERLEAVED |
564 SNDRV_PCM_INFO_BLOCK_TRANSFER |
565 SNDRV_PCM_INFO_PAUSE,
566 .buffer_bytes_max = 1024 * 1024,
567 .period_bytes_min = 64,
568 .period_bytes_max = 512 * 1024,
573 static int hw_check_valid_format(struct snd_usb_substream *subs,
574 struct snd_pcm_hw_params *params,
575 struct audioformat *fp)
577 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
578 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
579 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
580 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
581 struct snd_mask check_fmts;
584 /* check the format */
585 snd_mask_none(&check_fmts);
586 check_fmts.bits[0] = (u32)fp->formats;
587 check_fmts.bits[1] = (u32)(fp->formats >> 32);
588 snd_mask_intersect(&check_fmts, fmts);
589 if (snd_mask_empty(&check_fmts)) {
590 hwc_debug(" > check: no supported format %d\n", fp->format);
593 /* check the channels */
594 if (fp->channels < ct->min || fp->channels > ct->max) {
595 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
598 /* check the rate is within the range */
599 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
600 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
603 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
604 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
607 /* check whether the period time is >= the data packet interval */
608 if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) {
609 ptime = 125 * (1 << fp->datainterval);
610 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
611 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
618 static int hw_rule_rate(struct snd_pcm_hw_params *params,
619 struct snd_pcm_hw_rule *rule)
621 struct snd_usb_substream *subs = rule->private;
623 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
624 unsigned int rmin, rmax;
627 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
630 list_for_each(p, &subs->fmt_list) {
631 struct audioformat *fp;
632 fp = list_entry(p, struct audioformat, list);
633 if (!hw_check_valid_format(subs, params, fp))
636 if (rmin > fp->rate_min)
638 if (rmax < fp->rate_max)
647 hwc_debug(" --> get empty\n");
653 if (it->min < rmin) {
658 if (it->max > rmax) {
663 if (snd_interval_checkempty(it)) {
667 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
672 static int hw_rule_channels(struct snd_pcm_hw_params *params,
673 struct snd_pcm_hw_rule *rule)
675 struct snd_usb_substream *subs = rule->private;
677 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
678 unsigned int rmin, rmax;
681 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
684 list_for_each(p, &subs->fmt_list) {
685 struct audioformat *fp;
686 fp = list_entry(p, struct audioformat, list);
687 if (!hw_check_valid_format(subs, params, fp))
690 if (rmin > fp->channels)
692 if (rmax < fp->channels)
701 hwc_debug(" --> get empty\n");
707 if (it->min < rmin) {
712 if (it->max > rmax) {
717 if (snd_interval_checkempty(it)) {
721 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
725 static int hw_rule_format(struct snd_pcm_hw_params *params,
726 struct snd_pcm_hw_rule *rule)
728 struct snd_usb_substream *subs = rule->private;
730 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
735 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
737 list_for_each(p, &subs->fmt_list) {
738 struct audioformat *fp;
739 fp = list_entry(p, struct audioformat, list);
740 if (!hw_check_valid_format(subs, params, fp))
742 fbits |= fp->formats;
745 oldbits[0] = fmt->bits[0];
746 oldbits[1] = fmt->bits[1];
747 fmt->bits[0] &= (u32)fbits;
748 fmt->bits[1] &= (u32)(fbits >> 32);
749 if (!fmt->bits[0] && !fmt->bits[1]) {
750 hwc_debug(" --> get empty\n");
753 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
754 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
758 static int hw_rule_period_time(struct snd_pcm_hw_params *params,
759 struct snd_pcm_hw_rule *rule)
761 struct snd_usb_substream *subs = rule->private;
762 struct audioformat *fp;
763 struct snd_interval *it;
764 unsigned char min_datainterval;
768 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
769 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
770 min_datainterval = 0xff;
771 list_for_each_entry(fp, &subs->fmt_list, list) {
772 if (!hw_check_valid_format(subs, params, fp))
774 min_datainterval = min(min_datainterval, fp->datainterval);
776 if (min_datainterval == 0xff) {
777 hwc_debug(" --> get empty\n");
781 pmin = 125 * (1 << min_datainterval);
783 if (it->min < pmin) {
788 if (snd_interval_checkempty(it)) {
792 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
797 * If the device supports unusual bit rates, does the request meet these?
799 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
800 struct snd_usb_substream *subs)
802 struct audioformat *fp;
804 int count = 0, needs_knot = 0;
807 kfree(subs->rate_list.list);
808 subs->rate_list.list = NULL;
810 list_for_each_entry(fp, &subs->fmt_list, list) {
811 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
813 count += fp->nr_rates;
814 if (fp->rates & SNDRV_PCM_RATE_KNOT)
820 subs->rate_list.list = rate_list =
821 kmalloc(sizeof(int) * count, GFP_KERNEL);
822 if (!subs->rate_list.list)
824 subs->rate_list.count = count;
825 subs->rate_list.mask = 0;
827 list_for_each_entry(fp, &subs->fmt_list, list) {
829 for (i = 0; i < fp->nr_rates; i++)
830 rate_list[count++] = fp->rate_table[i];
832 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
842 * set up the runtime hardware information.
845 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
848 unsigned int pt, ptmin;
849 int param_period_time_if_needed;
852 runtime->hw.formats = subs->formats;
854 runtime->hw.rate_min = 0x7fffffff;
855 runtime->hw.rate_max = 0;
856 runtime->hw.channels_min = 256;
857 runtime->hw.channels_max = 0;
858 runtime->hw.rates = 0;
860 /* check min/max rates and channels */
861 list_for_each(p, &subs->fmt_list) {
862 struct audioformat *fp;
863 fp = list_entry(p, struct audioformat, list);
864 runtime->hw.rates |= fp->rates;
865 if (runtime->hw.rate_min > fp->rate_min)
866 runtime->hw.rate_min = fp->rate_min;
867 if (runtime->hw.rate_max < fp->rate_max)
868 runtime->hw.rate_max = fp->rate_max;
869 if (runtime->hw.channels_min > fp->channels)
870 runtime->hw.channels_min = fp->channels;
871 if (runtime->hw.channels_max < fp->channels)
872 runtime->hw.channels_max = fp->channels;
873 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
874 /* FIXME: there might be more than one audio formats... */
875 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
878 pt = 125 * (1 << fp->datainterval);
879 ptmin = min(ptmin, pt);
881 err = snd_usb_autoresume(subs->stream->chip);
885 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
886 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
887 /* full speed devices have fixed data packet interval */
890 /* if period time doesn't go below 1 ms, no rules needed */
891 param_period_time_if_needed = -1;
892 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
895 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
897 SNDRV_PCM_HW_PARAM_FORMAT,
898 SNDRV_PCM_HW_PARAM_CHANNELS,
899 param_period_time_if_needed,
902 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
903 hw_rule_channels, subs,
904 SNDRV_PCM_HW_PARAM_FORMAT,
905 SNDRV_PCM_HW_PARAM_RATE,
906 param_period_time_if_needed,
909 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
910 hw_rule_format, subs,
911 SNDRV_PCM_HW_PARAM_RATE,
912 SNDRV_PCM_HW_PARAM_CHANNELS,
913 param_period_time_if_needed,
916 if (param_period_time_if_needed >= 0) {
917 err = snd_pcm_hw_rule_add(runtime, 0,
918 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
919 hw_rule_period_time, subs,
920 SNDRV_PCM_HW_PARAM_FORMAT,
921 SNDRV_PCM_HW_PARAM_CHANNELS,
922 SNDRV_PCM_HW_PARAM_RATE,
927 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
932 snd_usb_autosuspend(subs->stream->chip);
936 static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
938 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
939 struct snd_pcm_runtime *runtime = substream->runtime;
940 struct snd_usb_substream *subs = &as->substream[direction];
942 subs->interface = -1;
943 subs->altset_idx = 0;
944 runtime->hw = snd_usb_hardware;
945 runtime->private_data = subs;
946 subs->pcm_substream = substream;
947 /* runtime PM is also done there */
948 return setup_hw_info(runtime, subs);
951 static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
953 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
954 struct snd_usb_substream *subs = &as->substream[direction];
956 stop_endpoints(subs, 0, 0, 0);
958 if (!as->chip->shutdown && subs->interface >= 0) {
959 usb_set_interface(subs->dev, subs->interface, 0);
960 subs->interface = -1;
963 subs->pcm_substream = NULL;
964 snd_usb_autosuspend(subs->stream->chip);
969 /* Since a URB can handle only a single linear buffer, we must use double
970 * buffering when the data to be transferred overflows the buffer boundary.
971 * To avoid inconsistencies when updating hwptr_done, we use double buffering
974 static void retire_capture_urb(struct snd_usb_substream *subs,
977 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
978 unsigned int stride, frames, bytes, oldptr;
979 int i, period_elapsed = 0;
983 stride = runtime->frame_bits >> 3;
985 for (i = 0; i < urb->number_of_packets; i++) {
986 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
987 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
988 snd_printdd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
991 bytes = urb->iso_frame_desc[i].actual_length;
992 frames = bytes / stride;
993 if (!subs->txfr_quirk)
994 bytes = frames * stride;
995 if (bytes % (runtime->sample_bits >> 3) != 0) {
996 #ifdef CONFIG_SND_DEBUG_VERBOSE
997 int oldbytes = bytes;
999 bytes = frames * stride;
1000 snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n",
1003 /* update the current pointer */
1004 spin_lock_irqsave(&subs->lock, flags);
1005 oldptr = subs->hwptr_done;
1006 subs->hwptr_done += bytes;
1007 if (subs->hwptr_done >= runtime->buffer_size * stride)
1008 subs->hwptr_done -= runtime->buffer_size * stride;
1009 frames = (bytes + (oldptr % stride)) / stride;
1010 subs->transfer_done += frames;
1011 if (subs->transfer_done >= runtime->period_size) {
1012 subs->transfer_done -= runtime->period_size;
1015 spin_unlock_irqrestore(&subs->lock, flags);
1016 /* copy a data chunk */
1017 if (oldptr + bytes > runtime->buffer_size * stride) {
1018 unsigned int bytes1 =
1019 runtime->buffer_size * stride - oldptr;
1020 memcpy(runtime->dma_area + oldptr, cp, bytes1);
1021 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1023 memcpy(runtime->dma_area + oldptr, cp, bytes);
1028 snd_pcm_period_elapsed(subs->pcm_substream);
1031 static void prepare_playback_urb(struct snd_usb_substream *subs,
1034 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1035 struct snd_urb_ctx *ctx = urb->context;
1036 unsigned int counts, frames, bytes;
1037 int i, stride, period_elapsed = 0;
1038 unsigned long flags;
1040 stride = runtime->frame_bits >> 3;
1043 urb->number_of_packets = 0;
1044 spin_lock_irqsave(&subs->lock, flags);
1045 for (i = 0; i < ctx->packets; i++) {
1046 counts = ctx->packet_size[i];
1047 /* set up descriptor */
1048 urb->iso_frame_desc[i].offset = frames * stride;
1049 urb->iso_frame_desc[i].length = counts * stride;
1051 urb->number_of_packets++;
1052 subs->transfer_done += counts;
1053 if (subs->transfer_done >= runtime->period_size) {
1054 subs->transfer_done -= runtime->period_size;
1056 if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1057 if (subs->transfer_done > 0) {
1058 /* FIXME: fill-max mode is not
1060 frames -= subs->transfer_done;
1061 counts -= subs->transfer_done;
1062 urb->iso_frame_desc[i].length =
1064 subs->transfer_done = 0;
1067 if (i < ctx->packets) {
1068 /* add a transfer delimiter */
1069 urb->iso_frame_desc[i].offset =
1071 urb->iso_frame_desc[i].length = 0;
1072 urb->number_of_packets++;
1077 if (period_elapsed &&
1078 !snd_usb_endpoint_implict_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */
1081 bytes = frames * stride;
1082 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
1083 /* err, the transferred area goes over buffer boundary. */
1084 unsigned int bytes1 =
1085 runtime->buffer_size * stride - subs->hwptr_done;
1086 memcpy(urb->transfer_buffer,
1087 runtime->dma_area + subs->hwptr_done, bytes1);
1088 memcpy(urb->transfer_buffer + bytes1,
1089 runtime->dma_area, bytes - bytes1);
1091 memcpy(urb->transfer_buffer,
1092 runtime->dma_area + subs->hwptr_done, bytes);
1094 subs->hwptr_done += bytes;
1095 if (subs->hwptr_done >= runtime->buffer_size * stride)
1096 subs->hwptr_done -= runtime->buffer_size * stride;
1097 runtime->delay += frames;
1098 spin_unlock_irqrestore(&subs->lock, flags);
1099 urb->transfer_buffer_length = bytes;
1101 snd_pcm_period_elapsed(subs->pcm_substream);
1105 * process after playback data complete
1106 * - decrease the delay count again
1108 static void retire_playback_urb(struct snd_usb_substream *subs,
1111 unsigned long flags;
1112 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1113 int stride = runtime->frame_bits >> 3;
1114 int processed = urb->transfer_buffer_length / stride;
1116 spin_lock_irqsave(&subs->lock, flags);
1117 if (processed > runtime->delay)
1120 runtime->delay -= processed;
1121 spin_unlock_irqrestore(&subs->lock, flags);
1124 static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1126 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1129 static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1131 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1134 static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1136 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1139 static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1141 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1144 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1147 struct snd_usb_substream *subs = substream->runtime->private_data;
1150 case SNDRV_PCM_TRIGGER_START:
1151 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1152 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
1153 subs->data_endpoint->retire_data_urb = retire_playback_urb;
1156 case SNDRV_PCM_TRIGGER_STOP:
1157 stop_endpoints(subs, 0, 0, 0);
1160 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1161 subs->data_endpoint->prepare_data_urb = NULL;
1162 subs->data_endpoint->retire_data_urb = NULL;
1170 static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream,
1174 struct snd_usb_substream *subs = substream->runtime->private_data;
1177 case SNDRV_PCM_TRIGGER_START:
1178 err = start_endpoints(subs);
1182 subs->data_endpoint->retire_data_urb = retire_capture_urb;
1185 case SNDRV_PCM_TRIGGER_STOP:
1186 stop_endpoints(subs, 0, 0, 0);
1189 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1190 subs->data_endpoint->retire_data_urb = NULL;
1193 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1194 subs->data_endpoint->retire_data_urb = retire_capture_urb;
1202 static struct snd_pcm_ops snd_usb_playback_ops = {
1203 .open = snd_usb_playback_open,
1204 .close = snd_usb_playback_close,
1205 .ioctl = snd_pcm_lib_ioctl,
1206 .hw_params = snd_usb_hw_params,
1207 .hw_free = snd_usb_hw_free,
1208 .prepare = snd_usb_pcm_prepare,
1209 .trigger = snd_usb_substream_playback_trigger,
1210 .pointer = snd_usb_pcm_pointer,
1211 .page = snd_pcm_lib_get_vmalloc_page,
1212 .mmap = snd_pcm_lib_mmap_vmalloc,
1215 static struct snd_pcm_ops snd_usb_capture_ops = {
1216 .open = snd_usb_capture_open,
1217 .close = snd_usb_capture_close,
1218 .ioctl = snd_pcm_lib_ioctl,
1219 .hw_params = snd_usb_hw_params,
1220 .hw_free = snd_usb_hw_free,
1221 .prepare = snd_usb_pcm_prepare,
1222 .trigger = snd_usb_substream_capture_trigger,
1223 .pointer = snd_usb_pcm_pointer,
1224 .page = snd_pcm_lib_get_vmalloc_page,
1225 .mmap = snd_pcm_lib_mmap_vmalloc,
1228 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1230 snd_pcm_set_ops(pcm, stream,
1231 stream == SNDRV_PCM_STREAM_PLAYBACK ?
1232 &snd_usb_playback_ops : &snd_usb_capture_ops);