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 activate_endpoints(struct snd_usb_substream *subs)
266 if (subs->sync_endpoint) {
269 ret = snd_usb_endpoint_activate(subs->sync_endpoint);
274 return snd_usb_endpoint_activate(subs->data_endpoint);
277 static int deactivate_endpoints(struct snd_usb_substream *subs)
281 reta = snd_usb_endpoint_deactivate(subs->sync_endpoint);
282 retb = snd_usb_endpoint_deactivate(subs->data_endpoint);
294 * find a matching format and set up the interface
296 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
298 struct usb_device *dev = subs->dev;
299 struct usb_host_interface *alts;
300 struct usb_interface_descriptor *altsd;
301 struct usb_interface *iface;
302 unsigned int ep, attr;
303 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
304 int err, implicit_fb = 0;
306 iface = usb_ifnum_to_if(dev, fmt->iface);
309 alts = &iface->altsetting[fmt->altset_idx];
310 altsd = get_iface_desc(alts);
311 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
314 if (fmt == subs->cur_audiofmt)
317 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
318 alts, fmt->endpoint, subs->direction,
319 SND_USB_ENDPOINT_TYPE_DATA);
320 if (!subs->data_endpoint)
323 /* we need a sync pipe in async OUT or adaptive IN mode */
324 /* check the number of EP, since some devices have broken
325 * descriptors which fool us. if it has only one EP,
326 * assume it as adaptive-out or sync-in.
328 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
330 switch (subs->stream->chip->usb_id) {
331 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
332 case USB_ID(0x0763, 0x2081):
336 iface = usb_ifnum_to_if(dev, 2);
338 if (!iface || iface->num_altsetting == 0)
341 alts = &iface->altsetting[1];
346 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
347 (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
348 altsd->bNumEndpoints >= 2) {
349 /* check sync-pipe endpoint */
350 /* ... and check descriptor size before accessing bSynchAddress
351 because there is a version of the SB Audigy 2 NX firmware lacking
352 the audio fields in the endpoint descriptors */
353 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
354 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
355 get_endpoint(alts, 1)->bSynchAddress != 0 &&
357 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
358 dev->devnum, fmt->iface, fmt->altsetting);
361 ep = get_endpoint(alts, 1)->bEndpointAddress;
362 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
363 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
364 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)) ||
365 ( is_playback && !implicit_fb))) {
366 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
367 dev->devnum, fmt->iface, fmt->altsetting);
371 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
372 == USB_ENDPOINT_USAGE_IMPLICIT_FB;
375 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
376 alts, ep, !subs->direction,
378 SND_USB_ENDPOINT_TYPE_DATA :
379 SND_USB_ENDPOINT_TYPE_SYNC);
380 if (!subs->sync_endpoint)
383 subs->data_endpoint->sync_master = subs->sync_endpoint;
386 if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0)
389 subs->cur_audiofmt = fmt;
391 snd_usb_set_format_quirk(subs, fmt);
395 "setting done: format = %d, rate = %d..%d, channels = %d\n",
396 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
398 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
399 subs->datapipe, subs->syncpipe);
408 * allocate a buffer and set the given audio format.
410 * so far we use a physically linear buffer although packetize transfer
411 * doesn't need a continuous area.
412 * if sg buffer is supported on the later version of alsa, we'll follow
415 static int snd_usb_hw_params(struct snd_pcm_substream *substream,
416 struct snd_pcm_hw_params *hw_params)
418 struct snd_usb_substream *subs = substream->runtime->private_data;
419 struct audioformat *fmt;
420 unsigned int channels, rate, format;
423 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
424 params_buffer_bytes(hw_params));
428 format = params_format(hw_params);
429 rate = params_rate(hw_params);
430 channels = params_channels(hw_params);
431 fmt = find_format(subs, format, rate, channels);
433 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
434 format, rate, channels);
438 changed = subs->cur_audiofmt != fmt ||
439 subs->period_bytes != params_period_bytes(hw_params) ||
440 subs->cur_rate != rate;
441 if ((ret = set_format(subs, fmt)) < 0)
444 if (subs->cur_rate != rate) {
445 struct usb_host_interface *alts;
446 struct usb_interface *iface;
447 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
448 alts = &iface->altsetting[fmt->altset_idx];
449 ret = snd_usb_init_sample_rate(subs->stream->chip, subs->interface, alts, fmt, rate);
452 subs->cur_rate = rate;
456 mutex_lock(&subs->stream->chip->shutdown_mutex);
458 stop_endpoints(subs, 0, 0, 0);
459 deactivate_endpoints(subs);
461 ret = activate_endpoints(subs);
465 ret = snd_usb_endpoint_set_params(subs->data_endpoint, hw_params, fmt,
466 subs->sync_endpoint);
470 if (subs->sync_endpoint)
471 ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
472 hw_params, fmt, NULL);
474 mutex_unlock(&subs->stream->chip->shutdown_mutex);
483 * reset the audio format and release the buffer
485 static int snd_usb_hw_free(struct snd_pcm_substream *substream)
487 struct snd_usb_substream *subs = substream->runtime->private_data;
489 subs->cur_audiofmt = NULL;
491 subs->period_bytes = 0;
492 mutex_lock(&subs->stream->chip->shutdown_mutex);
493 stop_endpoints(subs, 0, 1, 1);
494 mutex_unlock(&subs->stream->chip->shutdown_mutex);
495 return snd_pcm_lib_free_vmalloc_buffer(substream);
501 * only a few subtle things...
503 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
505 struct snd_pcm_runtime *runtime = substream->runtime;
506 struct snd_usb_substream *subs = runtime->private_data;
508 if (! subs->cur_audiofmt) {
509 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
513 if (snd_BUG_ON(!subs->data_endpoint))
516 /* some unit conversions in runtime */
517 subs->data_endpoint->maxframesize =
518 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
519 subs->data_endpoint->curframesize =
520 bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
522 /* reset the pointer */
523 subs->hwptr_done = 0;
524 subs->transfer_done = 0;
525 subs->last_delay = 0;
526 subs->last_frame_number = 0;
529 /* for playback, submit the URBs now; otherwise, the first hwptr_done
530 * updates for all URBs would happen at the same time when starting */
531 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
532 return start_endpoints(subs);
537 static struct snd_pcm_hardware snd_usb_hardware =
539 .info = SNDRV_PCM_INFO_MMAP |
540 SNDRV_PCM_INFO_MMAP_VALID |
541 SNDRV_PCM_INFO_BATCH |
542 SNDRV_PCM_INFO_INTERLEAVED |
543 SNDRV_PCM_INFO_BLOCK_TRANSFER |
544 SNDRV_PCM_INFO_PAUSE,
545 .buffer_bytes_max = 1024 * 1024,
546 .period_bytes_min = 64,
547 .period_bytes_max = 512 * 1024,
552 static int hw_check_valid_format(struct snd_usb_substream *subs,
553 struct snd_pcm_hw_params *params,
554 struct audioformat *fp)
556 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
557 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
558 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
559 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
560 struct snd_mask check_fmts;
563 /* check the format */
564 snd_mask_none(&check_fmts);
565 check_fmts.bits[0] = (u32)fp->formats;
566 check_fmts.bits[1] = (u32)(fp->formats >> 32);
567 snd_mask_intersect(&check_fmts, fmts);
568 if (snd_mask_empty(&check_fmts)) {
569 hwc_debug(" > check: no supported format %d\n", fp->format);
572 /* check the channels */
573 if (fp->channels < ct->min || fp->channels > ct->max) {
574 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
577 /* check the rate is within the range */
578 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
579 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
582 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
583 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
586 /* check whether the period time is >= the data packet interval */
587 if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) {
588 ptime = 125 * (1 << fp->datainterval);
589 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
590 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
597 static int hw_rule_rate(struct snd_pcm_hw_params *params,
598 struct snd_pcm_hw_rule *rule)
600 struct snd_usb_substream *subs = rule->private;
602 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
603 unsigned int rmin, rmax;
606 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
609 list_for_each(p, &subs->fmt_list) {
610 struct audioformat *fp;
611 fp = list_entry(p, struct audioformat, list);
612 if (!hw_check_valid_format(subs, params, fp))
615 if (rmin > fp->rate_min)
617 if (rmax < fp->rate_max)
626 hwc_debug(" --> get empty\n");
632 if (it->min < rmin) {
637 if (it->max > rmax) {
642 if (snd_interval_checkempty(it)) {
646 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
651 static int hw_rule_channels(struct snd_pcm_hw_params *params,
652 struct snd_pcm_hw_rule *rule)
654 struct snd_usb_substream *subs = rule->private;
656 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
657 unsigned int rmin, rmax;
660 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
663 list_for_each(p, &subs->fmt_list) {
664 struct audioformat *fp;
665 fp = list_entry(p, struct audioformat, list);
666 if (!hw_check_valid_format(subs, params, fp))
669 if (rmin > fp->channels)
671 if (rmax < fp->channels)
680 hwc_debug(" --> get empty\n");
686 if (it->min < rmin) {
691 if (it->max > rmax) {
696 if (snd_interval_checkempty(it)) {
700 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
704 static int hw_rule_format(struct snd_pcm_hw_params *params,
705 struct snd_pcm_hw_rule *rule)
707 struct snd_usb_substream *subs = rule->private;
709 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
714 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
716 list_for_each(p, &subs->fmt_list) {
717 struct audioformat *fp;
718 fp = list_entry(p, struct audioformat, list);
719 if (!hw_check_valid_format(subs, params, fp))
721 fbits |= fp->formats;
724 oldbits[0] = fmt->bits[0];
725 oldbits[1] = fmt->bits[1];
726 fmt->bits[0] &= (u32)fbits;
727 fmt->bits[1] &= (u32)(fbits >> 32);
728 if (!fmt->bits[0] && !fmt->bits[1]) {
729 hwc_debug(" --> get empty\n");
732 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
733 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
737 static int hw_rule_period_time(struct snd_pcm_hw_params *params,
738 struct snd_pcm_hw_rule *rule)
740 struct snd_usb_substream *subs = rule->private;
741 struct audioformat *fp;
742 struct snd_interval *it;
743 unsigned char min_datainterval;
747 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
748 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
749 min_datainterval = 0xff;
750 list_for_each_entry(fp, &subs->fmt_list, list) {
751 if (!hw_check_valid_format(subs, params, fp))
753 min_datainterval = min(min_datainterval, fp->datainterval);
755 if (min_datainterval == 0xff) {
756 hwc_debug(" --> get empty\n");
760 pmin = 125 * (1 << min_datainterval);
762 if (it->min < pmin) {
767 if (snd_interval_checkempty(it)) {
771 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
776 * If the device supports unusual bit rates, does the request meet these?
778 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
779 struct snd_usb_substream *subs)
781 struct audioformat *fp;
783 int count = 0, needs_knot = 0;
786 list_for_each_entry(fp, &subs->fmt_list, list) {
787 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
789 count += fp->nr_rates;
790 if (fp->rates & SNDRV_PCM_RATE_KNOT)
796 subs->rate_list.list = rate_list =
797 kmalloc(sizeof(int) * count, GFP_KERNEL);
798 if (!subs->rate_list.list)
800 subs->rate_list.count = count;
801 subs->rate_list.mask = 0;
803 list_for_each_entry(fp, &subs->fmt_list, list) {
805 for (i = 0; i < fp->nr_rates; i++)
806 rate_list[count++] = fp->rate_table[i];
808 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
818 * set up the runtime hardware information.
821 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
824 unsigned int pt, ptmin;
825 int param_period_time_if_needed;
828 runtime->hw.formats = subs->formats;
830 runtime->hw.rate_min = 0x7fffffff;
831 runtime->hw.rate_max = 0;
832 runtime->hw.channels_min = 256;
833 runtime->hw.channels_max = 0;
834 runtime->hw.rates = 0;
836 /* check min/max rates and channels */
837 list_for_each(p, &subs->fmt_list) {
838 struct audioformat *fp;
839 fp = list_entry(p, struct audioformat, list);
840 runtime->hw.rates |= fp->rates;
841 if (runtime->hw.rate_min > fp->rate_min)
842 runtime->hw.rate_min = fp->rate_min;
843 if (runtime->hw.rate_max < fp->rate_max)
844 runtime->hw.rate_max = fp->rate_max;
845 if (runtime->hw.channels_min > fp->channels)
846 runtime->hw.channels_min = fp->channels;
847 if (runtime->hw.channels_max < fp->channels)
848 runtime->hw.channels_max = fp->channels;
849 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
850 /* FIXME: there might be more than one audio formats... */
851 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
854 pt = 125 * (1 << fp->datainterval);
855 ptmin = min(ptmin, pt);
857 err = snd_usb_autoresume(subs->stream->chip);
861 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
862 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
863 /* full speed devices have fixed data packet interval */
866 /* if period time doesn't go below 1 ms, no rules needed */
867 param_period_time_if_needed = -1;
868 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
871 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
873 SNDRV_PCM_HW_PARAM_FORMAT,
874 SNDRV_PCM_HW_PARAM_CHANNELS,
875 param_period_time_if_needed,
878 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
879 hw_rule_channels, subs,
880 SNDRV_PCM_HW_PARAM_FORMAT,
881 SNDRV_PCM_HW_PARAM_RATE,
882 param_period_time_if_needed,
885 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
886 hw_rule_format, subs,
887 SNDRV_PCM_HW_PARAM_RATE,
888 SNDRV_PCM_HW_PARAM_CHANNELS,
889 param_period_time_if_needed,
892 if (param_period_time_if_needed >= 0) {
893 err = snd_pcm_hw_rule_add(runtime, 0,
894 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
895 hw_rule_period_time, subs,
896 SNDRV_PCM_HW_PARAM_FORMAT,
897 SNDRV_PCM_HW_PARAM_CHANNELS,
898 SNDRV_PCM_HW_PARAM_RATE,
903 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
908 snd_usb_autosuspend(subs->stream->chip);
912 static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
914 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
915 struct snd_pcm_runtime *runtime = substream->runtime;
916 struct snd_usb_substream *subs = &as->substream[direction];
918 subs->interface = -1;
919 subs->altset_idx = 0;
920 runtime->hw = snd_usb_hardware;
921 runtime->private_data = subs;
922 subs->pcm_substream = substream;
923 /* runtime PM is also done there */
924 return setup_hw_info(runtime, subs);
927 static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
930 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
931 struct snd_usb_substream *subs = &as->substream[direction];
933 stop_endpoints(subs, 0, 0, 0);
934 ret = deactivate_endpoints(subs);
935 subs->pcm_substream = NULL;
936 snd_usb_autosuspend(subs->stream->chip);
941 /* Since a URB can handle only a single linear buffer, we must use double
942 * buffering when the data to be transferred overflows the buffer boundary.
943 * To avoid inconsistencies when updating hwptr_done, we use double buffering
946 static void retire_capture_urb(struct snd_usb_substream *subs,
949 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
950 unsigned int stride, frames, bytes, oldptr;
951 int i, period_elapsed = 0;
955 stride = runtime->frame_bits >> 3;
957 for (i = 0; i < urb->number_of_packets; i++) {
958 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
959 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
960 snd_printdd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
963 bytes = urb->iso_frame_desc[i].actual_length;
964 frames = bytes / stride;
965 if (!subs->txfr_quirk)
966 bytes = frames * stride;
967 if (bytes % (runtime->sample_bits >> 3) != 0) {
968 #ifdef CONFIG_SND_DEBUG_VERBOSE
969 int oldbytes = bytes;
971 bytes = frames * stride;
972 snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n",
975 /* update the current pointer */
976 spin_lock_irqsave(&subs->lock, flags);
977 oldptr = subs->hwptr_done;
978 subs->hwptr_done += bytes;
979 if (subs->hwptr_done >= runtime->buffer_size * stride)
980 subs->hwptr_done -= runtime->buffer_size * stride;
981 frames = (bytes + (oldptr % stride)) / stride;
982 subs->transfer_done += frames;
983 if (subs->transfer_done >= runtime->period_size) {
984 subs->transfer_done -= runtime->period_size;
987 spin_unlock_irqrestore(&subs->lock, flags);
988 /* copy a data chunk */
989 if (oldptr + bytes > runtime->buffer_size * stride) {
990 unsigned int bytes1 =
991 runtime->buffer_size * stride - oldptr;
992 memcpy(runtime->dma_area + oldptr, cp, bytes1);
993 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
995 memcpy(runtime->dma_area + oldptr, cp, bytes);
1000 snd_pcm_period_elapsed(subs->pcm_substream);
1003 static void prepare_playback_urb(struct snd_usb_substream *subs,
1006 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1007 struct snd_urb_ctx *ctx = urb->context;
1008 unsigned int counts, frames, bytes;
1009 int i, stride, period_elapsed = 0;
1010 unsigned long flags;
1012 stride = runtime->frame_bits >> 3;
1015 urb->number_of_packets = 0;
1016 spin_lock_irqsave(&subs->lock, flags);
1017 for (i = 0; i < ctx->packets; i++) {
1018 counts = ctx->packet_size[i];
1019 /* set up descriptor */
1020 urb->iso_frame_desc[i].offset = frames * stride;
1021 urb->iso_frame_desc[i].length = counts * stride;
1023 urb->number_of_packets++;
1024 subs->transfer_done += counts;
1025 if (subs->transfer_done >= runtime->period_size) {
1026 subs->transfer_done -= runtime->period_size;
1028 if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1029 if (subs->transfer_done > 0) {
1030 /* FIXME: fill-max mode is not
1032 frames -= subs->transfer_done;
1033 counts -= subs->transfer_done;
1034 urb->iso_frame_desc[i].length =
1036 subs->transfer_done = 0;
1039 if (i < ctx->packets) {
1040 /* add a transfer delimiter */
1041 urb->iso_frame_desc[i].offset =
1043 urb->iso_frame_desc[i].length = 0;
1044 urb->number_of_packets++;
1049 if (period_elapsed &&
1050 !snd_usb_endpoint_implict_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */
1053 bytes = frames * stride;
1054 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
1055 /* err, the transferred area goes over buffer boundary. */
1056 unsigned int bytes1 =
1057 runtime->buffer_size * stride - subs->hwptr_done;
1058 memcpy(urb->transfer_buffer,
1059 runtime->dma_area + subs->hwptr_done, bytes1);
1060 memcpy(urb->transfer_buffer + bytes1,
1061 runtime->dma_area, bytes - bytes1);
1063 memcpy(urb->transfer_buffer,
1064 runtime->dma_area + subs->hwptr_done, bytes);
1066 subs->hwptr_done += bytes;
1067 if (subs->hwptr_done >= runtime->buffer_size * stride)
1068 subs->hwptr_done -= runtime->buffer_size * stride;
1069 runtime->delay += frames;
1070 spin_unlock_irqrestore(&subs->lock, flags);
1071 urb->transfer_buffer_length = bytes;
1073 snd_pcm_period_elapsed(subs->pcm_substream);
1077 * process after playback data complete
1078 * - decrease the delay count again
1080 static void retire_playback_urb(struct snd_usb_substream *subs,
1083 unsigned long flags;
1084 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1085 int stride = runtime->frame_bits >> 3;
1086 int processed = urb->transfer_buffer_length / stride;
1088 spin_lock_irqsave(&subs->lock, flags);
1089 if (processed > runtime->delay)
1092 runtime->delay -= processed;
1093 spin_unlock_irqrestore(&subs->lock, flags);
1096 static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1098 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1101 static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1103 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1106 static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1108 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1111 static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1113 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1116 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1119 struct snd_usb_substream *subs = substream->runtime->private_data;
1122 case SNDRV_PCM_TRIGGER_START:
1123 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1124 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
1125 subs->data_endpoint->retire_data_urb = retire_playback_urb;
1127 case SNDRV_PCM_TRIGGER_STOP:
1128 stop_endpoints(subs, 0, 0, 0);
1130 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1131 subs->data_endpoint->prepare_data_urb = NULL;
1132 subs->data_endpoint->retire_data_urb = NULL;
1139 int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd)
1142 struct snd_usb_substream *subs = substream->runtime->private_data;
1145 case SNDRV_PCM_TRIGGER_START:
1146 err = start_endpoints(subs);
1150 subs->data_endpoint->retire_data_urb = retire_capture_urb;
1152 case SNDRV_PCM_TRIGGER_STOP:
1153 stop_endpoints(subs, 0, 0, 0);
1155 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1156 subs->data_endpoint->retire_data_urb = NULL;
1158 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1159 subs->data_endpoint->retire_data_urb = retire_capture_urb;
1166 static struct snd_pcm_ops snd_usb_playback_ops = {
1167 .open = snd_usb_playback_open,
1168 .close = snd_usb_playback_close,
1169 .ioctl = snd_pcm_lib_ioctl,
1170 .hw_params = snd_usb_hw_params,
1171 .hw_free = snd_usb_hw_free,
1172 .prepare = snd_usb_pcm_prepare,
1173 .trigger = snd_usb_substream_playback_trigger,
1174 .pointer = snd_usb_pcm_pointer,
1175 .page = snd_pcm_lib_get_vmalloc_page,
1176 .mmap = snd_pcm_lib_mmap_vmalloc,
1179 static struct snd_pcm_ops snd_usb_capture_ops = {
1180 .open = snd_usb_capture_open,
1181 .close = snd_usb_capture_close,
1182 .ioctl = snd_pcm_lib_ioctl,
1183 .hw_params = snd_usb_hw_params,
1184 .hw_free = snd_usb_hw_free,
1185 .prepare = snd_usb_pcm_prepare,
1186 .trigger = snd_usb_substream_capture_trigger,
1187 .pointer = snd_usb_pcm_pointer,
1188 .page = snd_pcm_lib_get_vmalloc_page,
1189 .mmap = snd_pcm_lib_mmap_vmalloc,
1192 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1194 snd_pcm_set_ops(pcm, stream,
1195 stream == SNDRV_PCM_STREAM_PLAYBACK ?
1196 &snd_usb_playback_ops : &snd_usb_capture_ops);