blob: b4ef410e5a982b31adc933153773b34f9ccbbc2b [file] [log] [blame]
Daniel Macke5779992010-03-04 19:46:13 +01001/*
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>
Stephen Rothwell9966dda2010-03-29 19:01:48 +110018#include <linux/slab.h>
Daniel Mack44dcbbb2013-04-17 00:01:39 +080019#include <linux/bitrev.h>
Daniel Mackedcd3632012-04-12 13:51:12 +020020#include <linux/ratelimit.h>
Daniel Macke5779992010-03-04 19:46:13 +010021#include <linux/usb.h>
22#include <linux/usb/audio.h>
Daniel Mack7e847892010-03-11 21:13:20 +010023#include <linux/usb/audio-v2.h>
Daniel Macke5779992010-03-04 19:46:13 +010024
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28
29#include "usbaudio.h"
30#include "card.h"
31#include "quirks.h"
32#include "debug.h"
Daniel Mackc731bc92011-09-14 12:46:57 +020033#include "endpoint.h"
Daniel Macke5779992010-03-04 19:46:13 +010034#include "helper.h"
35#include "pcm.h"
Daniel Mack79f920f2010-05-31 14:51:31 +020036#include "clock.h"
Oliver Neukum88a85162011-03-11 14:51:12 +010037#include "power.h"
Daniel Macke5779992010-03-04 19:46:13 +010038
Daniel Mackedcd3632012-04-12 13:51:12 +020039#define SUBSTREAM_FLAG_DATA_EP_STARTED 0
40#define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
41
Pierre-Louis Bossart294c4fb2011-09-06 19:15:34 -050042/* return the estimated delay based on USB frame counters */
43snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
44 unsigned int rate)
45{
46 int current_frame_number;
47 int frame_diff;
48 int est_delay;
49
Takashi Iwai48779a02012-11-23 16:00:37 +010050 if (!subs->last_delay)
51 return 0; /* short path */
52
Pierre-Louis Bossart294c4fb2011-09-06 19:15:34 -050053 current_frame_number = usb_get_current_frame_number(subs->dev);
54 /*
55 * HCD implementations use different widths, use lower 8 bits.
56 * The delay will be managed up to 256ms, which is more than
57 * enough
58 */
59 frame_diff = (current_frame_number - subs->last_frame_number) & 0xff;
60
61 /* Approximation based on number of samples per USB frame (ms),
62 some truncation for 44.1 but the estimate is good enough */
Pierre-Louis Bossarte4cc6152012-12-19 11:39:05 -060063 est_delay = frame_diff * rate / 1000;
64 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
65 est_delay = subs->last_delay - est_delay;
66 else
67 est_delay = subs->last_delay + est_delay;
68
Pierre-Louis Bossart294c4fb2011-09-06 19:15:34 -050069 if (est_delay < 0)
70 est_delay = 0;
71 return est_delay;
72}
73
Daniel Macke5779992010-03-04 19:46:13 +010074/*
75 * return the current pcm pointer. just based on the hwptr_done value.
76 */
77static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
78{
79 struct snd_usb_substream *subs;
80 unsigned int hwptr_done;
81
82 subs = (struct snd_usb_substream *)substream->runtime->private_data;
Takashi Iwai978520b2012-10-12 15:12:55 +020083 if (subs->stream->chip->shutdown)
84 return SNDRV_PCM_POS_XRUN;
Daniel Macke5779992010-03-04 19:46:13 +010085 spin_lock(&subs->lock);
86 hwptr_done = subs->hwptr_done;
Pierre-Louis Bossarte4cc6152012-12-19 11:39:05 -060087 substream->runtime->delay = snd_usb_pcm_delay(subs,
Pierre-Louis Bossart294c4fb2011-09-06 19:15:34 -050088 substream->runtime->rate);
Daniel Macke5779992010-03-04 19:46:13 +010089 spin_unlock(&subs->lock);
90 return hwptr_done / (substream->runtime->frame_bits >> 3);
91}
92
93/*
94 * find a matching audio format
95 */
Dylan Reid61a70952012-09-18 09:49:48 -070096static struct audioformat *find_format(struct snd_usb_substream *subs)
Daniel Macke5779992010-03-04 19:46:13 +010097{
Eldad Zack88766f02013-04-03 23:18:49 +020098 struct audioformat *fp;
Daniel Macke5779992010-03-04 19:46:13 +010099 struct audioformat *found = NULL;
100 int cur_attr = 0, attr;
101
Eldad Zack88766f02013-04-03 23:18:49 +0200102 list_for_each_entry(fp, &subs->fmt_list, list) {
Eldad Zack74c34ca2013-04-23 01:00:41 +0200103 if (!(fp->formats & pcm_format_to_bits(subs->pcm_format)))
Clemens Ladisch015eb0b2010-03-04 19:46:15 +0100104 continue;
Dylan Reid61a70952012-09-18 09:49:48 -0700105 if (fp->channels != subs->channels)
Daniel Macke5779992010-03-04 19:46:13 +0100106 continue;
Dylan Reid61a70952012-09-18 09:49:48 -0700107 if (subs->cur_rate < fp->rate_min ||
108 subs->cur_rate > fp->rate_max)
Daniel Macke5779992010-03-04 19:46:13 +0100109 continue;
110 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
111 unsigned int i;
112 for (i = 0; i < fp->nr_rates; i++)
Dylan Reid61a70952012-09-18 09:49:48 -0700113 if (fp->rate_table[i] == subs->cur_rate)
Daniel Macke5779992010-03-04 19:46:13 +0100114 break;
115 if (i >= fp->nr_rates)
116 continue;
117 }
118 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
119 if (! found) {
120 found = fp;
121 cur_attr = attr;
122 continue;
123 }
124 /* avoid async out and adaptive in if the other method
125 * supports the same format.
126 * this is a workaround for the case like
127 * M-audio audiophile USB.
128 */
129 if (attr != cur_attr) {
130 if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
131 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
132 (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
133 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
134 continue;
135 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
136 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
137 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
138 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
139 found = fp;
140 cur_attr = attr;
141 continue;
142 }
143 }
144 /* find the format with the largest max. packet size */
145 if (fp->maxpacksize > found->maxpacksize) {
146 found = fp;
147 cur_attr = attr;
148 }
149 }
150 return found;
151}
152
Daniel Mack767d75a2010-03-04 19:46:17 +0100153static int init_pitch_v1(struct snd_usb_audio *chip, int iface,
154 struct usb_host_interface *alts,
155 struct audioformat *fmt)
Daniel Macke5779992010-03-04 19:46:13 +0100156{
Daniel Mack767d75a2010-03-04 19:46:17 +0100157 struct usb_device *dev = chip->dev;
Daniel Macke5779992010-03-04 19:46:13 +0100158 unsigned int ep;
159 unsigned char data[1];
160 int err;
161
162 ep = get_endpoint(alts, 0)->bEndpointAddress;
Daniel Mack767d75a2010-03-04 19:46:17 +0100163
Daniel Mack767d75a2010-03-04 19:46:17 +0100164 data[0] = 1;
165 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
166 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
167 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
Clemens Ladisch17d900c2011-09-26 21:15:27 +0200168 data, sizeof(data))) < 0) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100169 usb_audio_err(chip, "%d:%d: cannot set enable PITCH\n",
170 iface, ep);
Daniel Mack767d75a2010-03-04 19:46:17 +0100171 return err;
Daniel Macke5779992010-03-04 19:46:13 +0100172 }
Daniel Mack767d75a2010-03-04 19:46:17 +0100173
Daniel Macke5779992010-03-04 19:46:13 +0100174 return 0;
175}
176
Daniel Mack92c25612010-05-26 18:11:39 +0200177static int init_pitch_v2(struct snd_usb_audio *chip, int iface,
178 struct usb_host_interface *alts,
179 struct audioformat *fmt)
180{
181 struct usb_device *dev = chip->dev;
182 unsigned char data[1];
Daniel Mack92c25612010-05-26 18:11:39 +0200183 int err;
184
Daniel Mack92c25612010-05-26 18:11:39 +0200185 data[0] = 1;
186 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
187 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
188 UAC2_EP_CS_PITCH << 8, 0,
Clemens Ladisch17d900c2011-09-26 21:15:27 +0200189 data, sizeof(data))) < 0) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100190 usb_audio_err(chip, "%d:%d: cannot set enable PITCH (v2)\n",
191 iface, fmt->altsetting);
Daniel Mack92c25612010-05-26 18:11:39 +0200192 return err;
193 }
194
195 return 0;
196}
197
Daniel Mack767d75a2010-03-04 19:46:17 +0100198/*
Daniel Mack92c25612010-05-26 18:11:39 +0200199 * initialize the pitch control and sample rate
Daniel Mack767d75a2010-03-04 19:46:17 +0100200 */
201int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
202 struct usb_host_interface *alts,
203 struct audioformat *fmt)
204{
Daniel Mack92c25612010-05-26 18:11:39 +0200205 /* if endpoint doesn't have pitch control, bail out */
206 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
207 return 0;
208
Clemens Ladisch8f898e92013-01-31 21:39:17 +0100209 switch (fmt->protocol) {
Daniel Mack767d75a2010-03-04 19:46:17 +0100210 case UAC_VERSION_1:
Clemens Ladischa2acad82010-09-03 10:53:11 +0200211 default:
Daniel Mack767d75a2010-03-04 19:46:17 +0100212 return init_pitch_v1(chip, iface, alts, fmt);
213
214 case UAC_VERSION_2:
Daniel Mack92c25612010-05-26 18:11:39 +0200215 return init_pitch_v2(chip, iface, alts, fmt);
Daniel Mack767d75a2010-03-04 19:46:17 +0100216 }
Daniel Mack767d75a2010-03-04 19:46:17 +0100217}
218
Takashi Iwaia9bb3622012-11-20 18:32:06 +0100219static int start_endpoints(struct snd_usb_substream *subs, bool can_sleep)
Daniel Mackedcd3632012-04-12 13:51:12 +0200220{
221 int err;
222
223 if (!subs->data_endpoint)
224 return -EINVAL;
225
226 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
227 struct snd_usb_endpoint *ep = subs->data_endpoint;
228
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100229 dev_dbg(&subs->dev->dev, "Starting data EP @%p\n", ep);
Daniel Mackedcd3632012-04-12 13:51:12 +0200230
231 ep->data_subs = subs;
Daniel Mack015618b2012-08-29 13:17:05 +0200232 err = snd_usb_endpoint_start(ep, can_sleep);
Daniel Mackedcd3632012-04-12 13:51:12 +0200233 if (err < 0) {
234 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
235 return err;
236 }
237 }
238
239 if (subs->sync_endpoint &&
240 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
241 struct snd_usb_endpoint *ep = subs->sync_endpoint;
242
Daniel Mack2e4a2632012-08-30 18:52:31 +0200243 if (subs->data_endpoint->iface != subs->sync_endpoint->iface ||
Eldad Zackdf23a242013-10-06 22:31:13 +0200244 subs->data_endpoint->altsetting != subs->sync_endpoint->altsetting) {
Daniel Mack2e4a2632012-08-30 18:52:31 +0200245 err = usb_set_interface(subs->dev,
246 subs->sync_endpoint->iface,
Eldad Zackdf23a242013-10-06 22:31:13 +0200247 subs->sync_endpoint->altsetting);
Daniel Mack2e4a2632012-08-30 18:52:31 +0200248 if (err < 0) {
Eldad Zack06613f52013-10-06 22:31:11 +0200249 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100250 dev_err(&subs->dev->dev,
251 "%d:%d: cannot set interface (%d)\n",
Daniel Mack2e4a2632012-08-30 18:52:31 +0200252 subs->sync_endpoint->iface,
Eldad Zackdf23a242013-10-06 22:31:13 +0200253 subs->sync_endpoint->altsetting, err);
Daniel Mack2e4a2632012-08-30 18:52:31 +0200254 return -EIO;
255 }
256 }
257
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100258 dev_dbg(&subs->dev->dev, "Starting sync EP @%p\n", ep);
Daniel Mackedcd3632012-04-12 13:51:12 +0200259
260 ep->sync_slave = subs->data_endpoint;
Daniel Mack015618b2012-08-29 13:17:05 +0200261 err = snd_usb_endpoint_start(ep, can_sleep);
Daniel Mackedcd3632012-04-12 13:51:12 +0200262 if (err < 0) {
263 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
264 return err;
265 }
266 }
267
268 return 0;
269}
270
Takashi Iwaia9bb3622012-11-20 18:32:06 +0100271static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
Daniel Mackedcd3632012-04-12 13:51:12 +0200272{
273 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
Takashi Iwaib2eb9502012-11-21 08:30:48 +0100274 snd_usb_endpoint_stop(subs->sync_endpoint);
Daniel Mackedcd3632012-04-12 13:51:12 +0200275
276 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
Takashi Iwaib2eb9502012-11-21 08:30:48 +0100277 snd_usb_endpoint_stop(subs->data_endpoint);
278
279 if (wait) {
280 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
281 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
282 }
Daniel Mackedcd3632012-04-12 13:51:12 +0200283}
284
Clemens Ladischba7c2be2013-02-03 22:31:20 +0100285static int search_roland_implicit_fb(struct usb_device *dev, int ifnum,
286 unsigned int altsetting,
287 struct usb_host_interface **alts,
288 unsigned int *ep)
289{
290 struct usb_interface *iface;
291 struct usb_interface_descriptor *altsd;
292 struct usb_endpoint_descriptor *epd;
293
294 iface = usb_ifnum_to_if(dev, ifnum);
295 if (!iface || iface->num_altsetting < altsetting + 1)
296 return -ENOENT;
297 *alts = &iface->altsetting[altsetting];
298 altsd = get_iface_desc(*alts);
299 if (altsd->bAlternateSetting != altsetting ||
300 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC ||
301 (altsd->bInterfaceSubClass != 2 &&
302 altsd->bInterfaceProtocol != 2 ) ||
303 altsd->bNumEndpoints < 1)
304 return -ENOENT;
305 epd = get_endpoint(*alts, 0);
306 if (!usb_endpoint_is_isoc_in(epd) ||
307 (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
308 USB_ENDPOINT_USAGE_IMPLICIT_FB)
309 return -ENOENT;
310 *ep = epd->bEndpointAddress;
311 return 0;
312}
313
Eldad Zacka60945f2013-08-03 10:50:18 +0200314static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
315 struct usb_device *dev,
316 struct usb_interface_descriptor *altsd,
317 unsigned int attr)
Daniel Macke5779992010-03-04 19:46:13 +0100318{
Eldad Zacka60945f2013-08-03 10:50:18 +0200319 struct usb_host_interface *alts;
Daniel Macke5779992010-03-04 19:46:13 +0100320 struct usb_interface *iface;
Eldad Zacka60945f2013-08-03 10:50:18 +0200321 unsigned int ep;
Daniel Mackc75a8a72012-04-12 13:51:14 +0200322
Eldad Zack914273c2013-08-03 10:50:21 +0200323 /* Implicit feedback sync EPs consumers are always playback EPs */
324 if (subs->direction != SNDRV_PCM_STREAM_PLAYBACK)
325 return 0;
326
Daniel Mackc75a8a72012-04-12 13:51:14 +0200327 switch (subs->stream->chip->usb_id) {
Eldad Zackca10a7e2012-11-28 23:55:41 +0100328 case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
Matt Gruskine9a25e02013-02-09 12:56:35 -0500329 case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
Eldad Zack914273c2013-08-03 10:50:21 +0200330 ep = 0x81;
331 iface = usb_ifnum_to_if(dev, 3);
Eldad Zackca10a7e2012-11-28 23:55:41 +0100332
Eldad Zack914273c2013-08-03 10:50:21 +0200333 if (!iface || iface->num_altsetting == 0)
334 return -EINVAL;
Eldad Zackca10a7e2012-11-28 23:55:41 +0100335
Eldad Zack914273c2013-08-03 10:50:21 +0200336 alts = &iface->altsetting[1];
337 goto add_sync_ep;
Eldad Zackca10a7e2012-11-28 23:55:41 +0100338 break;
Daniel Mackc75a8a72012-04-12 13:51:14 +0200339 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
340 case USB_ID(0x0763, 0x2081):
Eldad Zack914273c2013-08-03 10:50:21 +0200341 ep = 0x81;
342 iface = usb_ifnum_to_if(dev, 2);
Daniel Mackc75a8a72012-04-12 13:51:14 +0200343
Eldad Zack914273c2013-08-03 10:50:21 +0200344 if (!iface || iface->num_altsetting == 0)
345 return -EINVAL;
Daniel Mackc75a8a72012-04-12 13:51:14 +0200346
Eldad Zack914273c2013-08-03 10:50:21 +0200347 alts = &iface->altsetting[1];
348 goto add_sync_ep;
Daniel Mackc75a8a72012-04-12 13:51:14 +0200349 }
Eldad Zack914273c2013-08-03 10:50:21 +0200350 if (attr == USB_ENDPOINT_SYNC_ASYNC &&
Clemens Ladischba7c2be2013-02-03 22:31:20 +0100351 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
352 altsd->bInterfaceProtocol == 2 &&
353 altsd->bNumEndpoints == 1 &&
354 USB_ID_VENDOR(subs->stream->chip->usb_id) == 0x0582 /* Roland */ &&
355 search_roland_implicit_fb(dev, altsd->bInterfaceNumber + 1,
356 altsd->bAlternateSetting,
357 &alts, &ep) >= 0) {
Clemens Ladischba7c2be2013-02-03 22:31:20 +0100358 goto add_sync_ep;
359 }
Daniel Mackedcd3632012-04-12 13:51:12 +0200360
Eldad Zacka60945f2013-08-03 10:50:18 +0200361 /* No quirk */
362 return 0;
363
364add_sync_ep:
365 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
366 alts, ep, !subs->direction,
Eldad Zack88abb8e2013-08-03 10:51:14 +0200367 SND_USB_ENDPOINT_TYPE_DATA);
Eldad Zacka60945f2013-08-03 10:50:18 +0200368 if (!subs->sync_endpoint)
369 return -EINVAL;
370
371 subs->data_endpoint->sync_master = subs->sync_endpoint;
372
373 return 0;
374}
375
376static int set_sync_endpoint(struct snd_usb_substream *subs,
377 struct audioformat *fmt,
378 struct usb_device *dev,
379 struct usb_host_interface *alts,
380 struct usb_interface_descriptor *altsd)
381{
382 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
383 unsigned int ep, attr;
Eldad Zack95fec882013-08-03 10:50:20 +0200384 bool implicit_fb;
Eldad Zacka60945f2013-08-03 10:50:18 +0200385 int err;
386
387 /* we need a sync pipe in async OUT or adaptive IN mode */
388 /* check the number of EP, since some devices have broken
389 * descriptors which fool us. if it has only one EP,
390 * assume it as adaptive-out or sync-in.
391 */
392 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
393
394 err = set_sync_ep_implicit_fb_quirk(subs, dev, altsd, attr);
395 if (err < 0)
396 return err;
397
Eldad Zackf34d0652013-08-03 10:50:19 +0200398 if (altsd->bNumEndpoints < 2)
399 return 0;
Daniel Mackc75a8a72012-04-12 13:51:14 +0200400
Eldad Zackf34d0652013-08-03 10:50:19 +0200401 if ((is_playback && attr != USB_ENDPOINT_SYNC_ASYNC) ||
402 (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE))
403 return 0;
Daniel Mackc75a8a72012-04-12 13:51:14 +0200404
Eldad Zackf34d0652013-08-03 10:50:19 +0200405 /* check sync-pipe endpoint */
406 /* ... and check descriptor size before accessing bSynchAddress
407 because there is a version of the SB Audigy 2 NX firmware lacking
408 the audio fields in the endpoint descriptors */
409 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
410 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
Eldad Zack95fec882013-08-03 10:50:20 +0200411 get_endpoint(alts, 1)->bSynchAddress != 0)) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100412 dev_err(&dev->dev,
413 "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
414 fmt->iface, fmt->altsetting,
Eldad Zackf34d0652013-08-03 10:50:19 +0200415 get_endpoint(alts, 1)->bmAttributes,
416 get_endpoint(alts, 1)->bLength,
417 get_endpoint(alts, 1)->bSynchAddress);
418 return -EINVAL;
Daniel Mackedcd3632012-04-12 13:51:12 +0200419 }
Eldad Zackf34d0652013-08-03 10:50:19 +0200420 ep = get_endpoint(alts, 1)->bEndpointAddress;
Eldad Zack95fec882013-08-03 10:50:20 +0200421 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
Eldad Zackf34d0652013-08-03 10:50:19 +0200422 ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
423 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100424 dev_err(&dev->dev,
425 "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
426 fmt->iface, fmt->altsetting,
Eldad Zackf34d0652013-08-03 10:50:19 +0200427 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
428 return -EINVAL;
429 }
430
431 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
432 == USB_ENDPOINT_USAGE_IMPLICIT_FB;
433
434 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
435 alts, ep, !subs->direction,
436 implicit_fb ?
437 SND_USB_ENDPOINT_TYPE_DATA :
438 SND_USB_ENDPOINT_TYPE_SYNC);
439 if (!subs->sync_endpoint)
440 return -EINVAL;
441
442 subs->data_endpoint->sync_master = subs->sync_endpoint;
Daniel Macke5779992010-03-04 19:46:13 +0100443
Eldad Zack71bb64c2013-08-03 10:50:17 +0200444 return 0;
445}
446
447/*
448 * find a matching format and set up the interface
449 */
450static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
451{
452 struct usb_device *dev = subs->dev;
453 struct usb_host_interface *alts;
454 struct usb_interface_descriptor *altsd;
455 struct usb_interface *iface;
456 int err;
457
458 iface = usb_ifnum_to_if(dev, fmt->iface);
459 if (WARN_ON(!iface))
460 return -EINVAL;
461 alts = &iface->altsetting[fmt->altset_idx];
462 altsd = get_iface_desc(alts);
463 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
464 return -EINVAL;
465
466 if (fmt == subs->cur_audiofmt)
467 return 0;
468
469 /* close the old interface */
470 if (subs->interface >= 0 && subs->interface != fmt->iface) {
471 err = usb_set_interface(subs->dev, subs->interface, 0);
472 if (err < 0) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100473 dev_err(&dev->dev,
474 "%d:%d: return to setting 0 failed (%d)\n",
475 fmt->iface, fmt->altsetting, err);
Eldad Zack71bb64c2013-08-03 10:50:17 +0200476 return -EIO;
477 }
478 subs->interface = -1;
479 subs->altset_idx = 0;
480 }
481
482 /* set interface */
483 if (subs->interface != fmt->iface ||
484 subs->altset_idx != fmt->altset_idx) {
Jurgen Kramer6874daa2014-11-28 17:32:54 +0100485
486 err = snd_usb_select_mode_quirk(subs, fmt);
487 if (err < 0)
488 return -EIO;
489
Eldad Zack71bb64c2013-08-03 10:50:17 +0200490 err = usb_set_interface(dev, fmt->iface, fmt->altsetting);
491 if (err < 0) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100492 dev_err(&dev->dev,
493 "%d:%d: usb_set_interface failed (%d)\n",
494 fmt->iface, fmt->altsetting, err);
Eldad Zack71bb64c2013-08-03 10:50:17 +0200495 return -EIO;
496 }
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100497 dev_dbg(&dev->dev, "setting usb interface %d:%d\n",
498 fmt->iface, fmt->altsetting);
Eldad Zack71bb64c2013-08-03 10:50:17 +0200499 subs->interface = fmt->iface;
500 subs->altset_idx = fmt->altset_idx;
501
502 snd_usb_set_interface_quirk(dev);
503 }
504
505 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
506 alts, fmt->endpoint, subs->direction,
507 SND_USB_ENDPOINT_TYPE_DATA);
508
509 if (!subs->data_endpoint)
510 return -EINVAL;
511
512 err = set_sync_endpoint(subs, fmt, dev, alts, altsd);
513 if (err < 0)
514 return err;
515
Eldad Zackd133f2c2013-08-03 10:50:16 +0200516 err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt);
517 if (err < 0)
Daniel Macke5779992010-03-04 19:46:13 +0100518 return err;
519
520 subs->cur_audiofmt = fmt;
521
522 snd_usb_set_format_quirk(subs, fmt);
523
Daniel Macke5779992010-03-04 19:46:13 +0100524 return 0;
525}
526
527/*
Eldad Zack0d9741c2012-12-03 20:30:09 +0100528 * Return the score of matching two audioformats.
529 * Veto the audioformat if:
530 * - It has no channels for some reason.
531 * - Requested PCM format is not supported.
532 * - Requested sample rate is not supported.
533 */
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100534static int match_endpoint_audioformats(struct snd_usb_substream *subs,
535 struct audioformat *fp,
536 struct audioformat *match, int rate,
537 snd_pcm_format_t pcm_format)
Eldad Zack0d9741c2012-12-03 20:30:09 +0100538{
539 int i;
540 int score = 0;
541
542 if (fp->channels < 1) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100543 dev_dbg(&subs->dev->dev,
544 "%s: (fmt @%p) no channels\n", __func__, fp);
Eldad Zack0d9741c2012-12-03 20:30:09 +0100545 return 0;
546 }
547
Eldad Zack74c34ca2013-04-23 01:00:41 +0200548 if (!(fp->formats & pcm_format_to_bits(pcm_format))) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100549 dev_dbg(&subs->dev->dev,
550 "%s: (fmt @%p) no match for format %d\n", __func__,
Eldad Zack0d9741c2012-12-03 20:30:09 +0100551 fp, pcm_format);
552 return 0;
553 }
554
555 for (i = 0; i < fp->nr_rates; i++) {
556 if (fp->rate_table[i] == rate) {
557 score++;
558 break;
559 }
560 }
561 if (!score) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100562 dev_dbg(&subs->dev->dev,
563 "%s: (fmt @%p) no match for rate %d\n", __func__,
Eldad Zack0d9741c2012-12-03 20:30:09 +0100564 fp, rate);
565 return 0;
566 }
567
568 if (fp->channels == match->channels)
569 score++;
570
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100571 dev_dbg(&subs->dev->dev,
572 "%s: (fmt @%p) score %d\n", __func__, fp, score);
Eldad Zack0d9741c2012-12-03 20:30:09 +0100573
574 return score;
575}
576
577/*
578 * Configure the sync ep using the rate and pcm format of the data ep.
579 */
580static int configure_sync_endpoint(struct snd_usb_substream *subs)
581{
582 int ret;
583 struct audioformat *fp;
584 struct audioformat *sync_fp = NULL;
585 int cur_score = 0;
586 int sync_period_bytes = subs->period_bytes;
587 struct snd_usb_substream *sync_subs =
588 &subs->stream->substream[subs->direction ^ 1];
589
Takashi Iwai31be5422013-01-10 14:06:38 +0100590 if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA ||
591 !subs->stream)
592 return snd_usb_endpoint_set_params(subs->sync_endpoint,
593 subs->pcm_format,
594 subs->channels,
595 subs->period_bytes,
Alan Stern976b6c02013-09-24 15:51:58 -0400596 0, 0,
Takashi Iwai31be5422013-01-10 14:06:38 +0100597 subs->cur_rate,
598 subs->cur_audiofmt,
599 NULL);
600
Eldad Zack0d9741c2012-12-03 20:30:09 +0100601 /* Try to find the best matching audioformat. */
602 list_for_each_entry(fp, &sync_subs->fmt_list, list) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100603 int score = match_endpoint_audioformats(subs,
604 fp, subs->cur_audiofmt,
Eldad Zack0d9741c2012-12-03 20:30:09 +0100605 subs->cur_rate, subs->pcm_format);
606
607 if (score > cur_score) {
608 sync_fp = fp;
609 cur_score = score;
610 }
611 }
612
613 if (unlikely(sync_fp == NULL)) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100614 dev_err(&subs->dev->dev,
615 "%s: no valid audioformat for sync ep %x found\n",
Eldad Zack0d9741c2012-12-03 20:30:09 +0100616 __func__, sync_subs->ep_num);
617 return -EINVAL;
618 }
619
620 /*
621 * Recalculate the period bytes if channel number differ between
622 * data and sync ep audioformat.
623 */
624 if (sync_fp->channels != subs->channels) {
625 sync_period_bytes = (subs->period_bytes / subs->channels) *
626 sync_fp->channels;
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100627 dev_dbg(&subs->dev->dev,
628 "%s: adjusted sync ep period bytes (%d -> %d)\n",
Eldad Zack0d9741c2012-12-03 20:30:09 +0100629 __func__, subs->period_bytes, sync_period_bytes);
630 }
631
632 ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
633 subs->pcm_format,
634 sync_fp->channels,
635 sync_period_bytes,
Alan Stern976b6c02013-09-24 15:51:58 -0400636 0, 0,
Eldad Zack0d9741c2012-12-03 20:30:09 +0100637 subs->cur_rate,
638 sync_fp,
639 NULL);
640
641 return ret;
642}
643
644/*
Dylan Reid61a70952012-09-18 09:49:48 -0700645 * configure endpoint params
646 *
647 * called during initial setup and upon resume
648 */
649static int configure_endpoint(struct snd_usb_substream *subs)
650{
651 int ret;
652
Dylan Reid61a70952012-09-18 09:49:48 -0700653 /* format changed */
Takashi Iwaib0db6062012-11-21 08:35:42 +0100654 stop_endpoints(subs, true);
Dylan Reid61a70952012-09-18 09:49:48 -0700655 ret = snd_usb_endpoint_set_params(subs->data_endpoint,
656 subs->pcm_format,
657 subs->channels,
658 subs->period_bytes,
Alan Stern976b6c02013-09-24 15:51:58 -0400659 subs->period_frames,
660 subs->buffer_periods,
Dylan Reid61a70952012-09-18 09:49:48 -0700661 subs->cur_rate,
662 subs->cur_audiofmt,
663 subs->sync_endpoint);
664 if (ret < 0)
Takashi Iwai978520b2012-10-12 15:12:55 +0200665 return ret;
Dylan Reid61a70952012-09-18 09:49:48 -0700666
667 if (subs->sync_endpoint)
Eldad Zack0d9741c2012-12-03 20:30:09 +0100668 ret = configure_sync_endpoint(subs);
669
Dylan Reid61a70952012-09-18 09:49:48 -0700670 return ret;
671}
672
673/*
Daniel Macke5779992010-03-04 19:46:13 +0100674 * hw_params callback
675 *
676 * allocate a buffer and set the given audio format.
677 *
678 * so far we use a physically linear buffer although packetize transfer
679 * doesn't need a continuous area.
680 * if sg buffer is supported on the later version of alsa, we'll follow
681 * that.
682 */
683static int snd_usb_hw_params(struct snd_pcm_substream *substream,
684 struct snd_pcm_hw_params *hw_params)
685{
686 struct snd_usb_substream *subs = substream->runtime->private_data;
687 struct audioformat *fmt;
Dylan Reid61a70952012-09-18 09:49:48 -0700688 int ret;
Daniel Macke5779992010-03-04 19:46:13 +0100689
690 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
691 params_buffer_bytes(hw_params));
692 if (ret < 0)
693 return ret;
694
Dylan Reid61a70952012-09-18 09:49:48 -0700695 subs->pcm_format = params_format(hw_params);
696 subs->period_bytes = params_period_bytes(hw_params);
Alan Stern976b6c02013-09-24 15:51:58 -0400697 subs->period_frames = params_period_size(hw_params);
698 subs->buffer_periods = params_periods(hw_params);
Dylan Reid61a70952012-09-18 09:49:48 -0700699 subs->channels = params_channels(hw_params);
700 subs->cur_rate = params_rate(hw_params);
701
702 fmt = find_format(subs);
Daniel Macke5779992010-03-04 19:46:13 +0100703 if (!fmt) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100704 dev_dbg(&subs->dev->dev,
705 "cannot set format: format = %#x, rate = %d, channels = %d\n",
Dylan Reid61a70952012-09-18 09:49:48 -0700706 subs->pcm_format, subs->cur_rate, subs->channels);
Daniel Macke5779992010-03-04 19:46:13 +0100707 return -EINVAL;
708 }
709
Takashi Iwai34f3c892012-10-15 12:16:02 +0200710 down_read(&subs->stream->chip->shutdown_rwsem);
Takashi Iwai978520b2012-10-12 15:12:55 +0200711 if (subs->stream->chip->shutdown)
712 ret = -ENODEV;
713 else
714 ret = set_format(subs, fmt);
Takashi Iwai34f3c892012-10-15 12:16:02 +0200715 up_read(&subs->stream->chip->shutdown_rwsem);
Takashi Iwai978520b2012-10-12 15:12:55 +0200716 if (ret < 0)
Daniel Macke5779992010-03-04 19:46:13 +0100717 return ret;
718
Dylan Reid61a70952012-09-18 09:49:48 -0700719 subs->interface = fmt->iface;
720 subs->altset_idx = fmt->altset_idx;
Takashi Iwai384dc0852012-09-18 14:49:31 +0200721 subs->need_setup_ep = true;
Daniel Macke5779992010-03-04 19:46:13 +0100722
Dylan Reid61a70952012-09-18 09:49:48 -0700723 return 0;
Daniel Macke5779992010-03-04 19:46:13 +0100724}
725
726/*
727 * hw_free callback
728 *
729 * reset the audio format and release the buffer
730 */
731static int snd_usb_hw_free(struct snd_pcm_substream *substream)
732{
733 struct snd_usb_substream *subs = substream->runtime->private_data;
734
735 subs->cur_audiofmt = NULL;
736 subs->cur_rate = 0;
737 subs->period_bytes = 0;
Takashi Iwai34f3c892012-10-15 12:16:02 +0200738 down_read(&subs->stream->chip->shutdown_rwsem);
Takashi Iwai978520b2012-10-12 15:12:55 +0200739 if (!subs->stream->chip->shutdown) {
Takashi Iwaia9bb3622012-11-20 18:32:06 +0100740 stop_endpoints(subs, true);
Eldad Zack26de5d02013-10-06 22:31:07 +0200741 snd_usb_endpoint_deactivate(subs->sync_endpoint);
742 snd_usb_endpoint_deactivate(subs->data_endpoint);
Takashi Iwai978520b2012-10-12 15:12:55 +0200743 }
Takashi Iwai34f3c892012-10-15 12:16:02 +0200744 up_read(&subs->stream->chip->shutdown_rwsem);
Daniel Macke5779992010-03-04 19:46:13 +0100745 return snd_pcm_lib_free_vmalloc_buffer(substream);
746}
747
748/*
749 * prepare callback
750 *
751 * only a few subtle things...
752 */
753static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
754{
755 struct snd_pcm_runtime *runtime = substream->runtime;
756 struct snd_usb_substream *subs = runtime->private_data;
Dylan Reid61a70952012-09-18 09:49:48 -0700757 struct usb_host_interface *alts;
758 struct usb_interface *iface;
759 int ret;
Daniel Macke5779992010-03-04 19:46:13 +0100760
761 if (! subs->cur_audiofmt) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +0100762 dev_err(&subs->dev->dev, "no format is specified!\n");
Daniel Macke5779992010-03-04 19:46:13 +0100763 return -ENXIO;
764 }
765
Takashi Iwai34f3c892012-10-15 12:16:02 +0200766 down_read(&subs->stream->chip->shutdown_rwsem);
Takashi Iwai978520b2012-10-12 15:12:55 +0200767 if (subs->stream->chip->shutdown) {
768 ret = -ENODEV;
769 goto unlock;
770 }
771 if (snd_BUG_ON(!subs->data_endpoint)) {
772 ret = -EIO;
773 goto unlock;
774 }
Daniel Mackedcd3632012-04-12 13:51:12 +0200775
Takashi Iwaif58161b2012-11-08 08:52:45 +0100776 snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
777 snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
778
Dylan Reid61a70952012-09-18 09:49:48 -0700779 ret = set_format(subs, subs->cur_audiofmt);
780 if (ret < 0)
Takashi Iwai978520b2012-10-12 15:12:55 +0200781 goto unlock;
Dylan Reid61a70952012-09-18 09:49:48 -0700782
783 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface);
784 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx];
785 ret = snd_usb_init_sample_rate(subs->stream->chip,
786 subs->cur_audiofmt->iface,
787 alts,
788 subs->cur_audiofmt,
789 subs->cur_rate);
790 if (ret < 0)
Takashi Iwai978520b2012-10-12 15:12:55 +0200791 goto unlock;
Dylan Reid61a70952012-09-18 09:49:48 -0700792
Takashi Iwai384dc0852012-09-18 14:49:31 +0200793 if (subs->need_setup_ep) {
794 ret = configure_endpoint(subs);
795 if (ret < 0)
Takashi Iwai978520b2012-10-12 15:12:55 +0200796 goto unlock;
Takashi Iwai384dc0852012-09-18 14:49:31 +0200797 subs->need_setup_ep = false;
798 }
Dylan Reid61a70952012-09-18 09:49:48 -0700799
Daniel Macke5779992010-03-04 19:46:13 +0100800 /* some unit conversions in runtime */
Daniel Mackedcd3632012-04-12 13:51:12 +0200801 subs->data_endpoint->maxframesize =
802 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
803 subs->data_endpoint->curframesize =
804 bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
Daniel Macke5779992010-03-04 19:46:13 +0100805
806 /* reset the pointer */
807 subs->hwptr_done = 0;
808 subs->transfer_done = 0;
Pierre-Louis Bossart294c4fb2011-09-06 19:15:34 -0500809 subs->last_delay = 0;
810 subs->last_frame_number = 0;
Daniel Macke5779992010-03-04 19:46:13 +0100811 runtime->delay = 0;
812
Daniel Mackedcd3632012-04-12 13:51:12 +0200813 /* for playback, submit the URBs now; otherwise, the first hwptr_done
814 * updates for all URBs would happen at the same time when starting */
815 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
Takashi Iwaia9bb3622012-11-20 18:32:06 +0100816 ret = start_endpoints(subs, true);
Daniel Mackedcd3632012-04-12 13:51:12 +0200817
Takashi Iwai978520b2012-10-12 15:12:55 +0200818 unlock:
Takashi Iwai34f3c892012-10-15 12:16:02 +0200819 up_read(&subs->stream->chip->shutdown_rwsem);
Takashi Iwai978520b2012-10-12 15:12:55 +0200820 return ret;
Daniel Macke5779992010-03-04 19:46:13 +0100821}
822
823static struct snd_pcm_hardware snd_usb_hardware =
824{
825 .info = SNDRV_PCM_INFO_MMAP |
826 SNDRV_PCM_INFO_MMAP_VALID |
827 SNDRV_PCM_INFO_BATCH |
828 SNDRV_PCM_INFO_INTERLEAVED |
829 SNDRV_PCM_INFO_BLOCK_TRANSFER |
830 SNDRV_PCM_INFO_PAUSE,
831 .buffer_bytes_max = 1024 * 1024,
832 .period_bytes_min = 64,
833 .period_bytes_max = 512 * 1024,
834 .periods_min = 2,
835 .periods_max = 1024,
836};
837
838static int hw_check_valid_format(struct snd_usb_substream *subs,
839 struct snd_pcm_hw_params *params,
840 struct audioformat *fp)
841{
842 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
843 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
844 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
845 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
Clemens Ladisch015eb0b2010-03-04 19:46:15 +0100846 struct snd_mask check_fmts;
Daniel Macke5779992010-03-04 19:46:13 +0100847 unsigned int ptime;
848
849 /* check the format */
Clemens Ladisch015eb0b2010-03-04 19:46:15 +0100850 snd_mask_none(&check_fmts);
851 check_fmts.bits[0] = (u32)fp->formats;
852 check_fmts.bits[1] = (u32)(fp->formats >> 32);
853 snd_mask_intersect(&check_fmts, fmts);
854 if (snd_mask_empty(&check_fmts)) {
Daniel Macke5779992010-03-04 19:46:13 +0100855 hwc_debug(" > check: no supported format %d\n", fp->format);
856 return 0;
857 }
858 /* check the channels */
859 if (fp->channels < ct->min || fp->channels > ct->max) {
860 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
861 return 0;
862 }
863 /* check the rate is within the range */
864 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
865 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
866 return 0;
867 }
868 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
869 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
870 return 0;
871 }
872 /* check whether the period time is >= the data packet interval */
Takashi Iwai978520b2012-10-12 15:12:55 +0200873 if (subs->speed != USB_SPEED_FULL) {
Daniel Macke5779992010-03-04 19:46:13 +0100874 ptime = 125 * (1 << fp->datainterval);
875 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
876 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
877 return 0;
878 }
879 }
880 return 1;
881}
882
883static int hw_rule_rate(struct snd_pcm_hw_params *params,
884 struct snd_pcm_hw_rule *rule)
885{
886 struct snd_usb_substream *subs = rule->private;
Eldad Zack88766f02013-04-03 23:18:49 +0200887 struct audioformat *fp;
Daniel Macke5779992010-03-04 19:46:13 +0100888 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
889 unsigned int rmin, rmax;
890 int changed;
891
892 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
893 changed = 0;
894 rmin = rmax = 0;
Eldad Zack88766f02013-04-03 23:18:49 +0200895 list_for_each_entry(fp, &subs->fmt_list, list) {
Daniel Macke5779992010-03-04 19:46:13 +0100896 if (!hw_check_valid_format(subs, params, fp))
897 continue;
898 if (changed++) {
899 if (rmin > fp->rate_min)
900 rmin = fp->rate_min;
901 if (rmax < fp->rate_max)
902 rmax = fp->rate_max;
903 } else {
904 rmin = fp->rate_min;
905 rmax = fp->rate_max;
906 }
907 }
908
909 if (!changed) {
910 hwc_debug(" --> get empty\n");
911 it->empty = 1;
912 return -EINVAL;
913 }
914
915 changed = 0;
916 if (it->min < rmin) {
917 it->min = rmin;
918 it->openmin = 0;
919 changed = 1;
920 }
921 if (it->max > rmax) {
922 it->max = rmax;
923 it->openmax = 0;
924 changed = 1;
925 }
926 if (snd_interval_checkempty(it)) {
927 it->empty = 1;
928 return -EINVAL;
929 }
930 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
931 return changed;
932}
933
934
935static int hw_rule_channels(struct snd_pcm_hw_params *params,
936 struct snd_pcm_hw_rule *rule)
937{
938 struct snd_usb_substream *subs = rule->private;
Eldad Zack88766f02013-04-03 23:18:49 +0200939 struct audioformat *fp;
Daniel Macke5779992010-03-04 19:46:13 +0100940 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
941 unsigned int rmin, rmax;
942 int changed;
943
944 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
945 changed = 0;
946 rmin = rmax = 0;
Eldad Zack88766f02013-04-03 23:18:49 +0200947 list_for_each_entry(fp, &subs->fmt_list, list) {
Daniel Macke5779992010-03-04 19:46:13 +0100948 if (!hw_check_valid_format(subs, params, fp))
949 continue;
950 if (changed++) {
951 if (rmin > fp->channels)
952 rmin = fp->channels;
953 if (rmax < fp->channels)
954 rmax = fp->channels;
955 } else {
956 rmin = fp->channels;
957 rmax = fp->channels;
958 }
959 }
960
961 if (!changed) {
962 hwc_debug(" --> get empty\n");
963 it->empty = 1;
964 return -EINVAL;
965 }
966
967 changed = 0;
968 if (it->min < rmin) {
969 it->min = rmin;
970 it->openmin = 0;
971 changed = 1;
972 }
973 if (it->max > rmax) {
974 it->max = rmax;
975 it->openmax = 0;
976 changed = 1;
977 }
978 if (snd_interval_checkempty(it)) {
979 it->empty = 1;
980 return -EINVAL;
981 }
982 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
983 return changed;
984}
985
986static int hw_rule_format(struct snd_pcm_hw_params *params,
987 struct snd_pcm_hw_rule *rule)
988{
989 struct snd_usb_substream *subs = rule->private;
Eldad Zack88766f02013-04-03 23:18:49 +0200990 struct audioformat *fp;
Daniel Macke5779992010-03-04 19:46:13 +0100991 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
992 u64 fbits;
993 u32 oldbits[2];
994 int changed;
995
996 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
997 fbits = 0;
Eldad Zack88766f02013-04-03 23:18:49 +0200998 list_for_each_entry(fp, &subs->fmt_list, list) {
Daniel Macke5779992010-03-04 19:46:13 +0100999 if (!hw_check_valid_format(subs, params, fp))
1000 continue;
Clemens Ladisch015eb0b2010-03-04 19:46:15 +01001001 fbits |= fp->formats;
Daniel Macke5779992010-03-04 19:46:13 +01001002 }
1003
1004 oldbits[0] = fmt->bits[0];
1005 oldbits[1] = fmt->bits[1];
1006 fmt->bits[0] &= (u32)fbits;
1007 fmt->bits[1] &= (u32)(fbits >> 32);
1008 if (!fmt->bits[0] && !fmt->bits[1]) {
1009 hwc_debug(" --> get empty\n");
1010 return -EINVAL;
1011 }
1012 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1013 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1014 return changed;
1015}
1016
1017static int hw_rule_period_time(struct snd_pcm_hw_params *params,
1018 struct snd_pcm_hw_rule *rule)
1019{
1020 struct snd_usb_substream *subs = rule->private;
1021 struct audioformat *fp;
1022 struct snd_interval *it;
1023 unsigned char min_datainterval;
1024 unsigned int pmin;
1025 int changed;
1026
1027 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
1028 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
1029 min_datainterval = 0xff;
1030 list_for_each_entry(fp, &subs->fmt_list, list) {
1031 if (!hw_check_valid_format(subs, params, fp))
1032 continue;
1033 min_datainterval = min(min_datainterval, fp->datainterval);
1034 }
1035 if (min_datainterval == 0xff) {
Uwe Kleine-Königa7ce2e02010-07-12 17:15:44 +02001036 hwc_debug(" --> get empty\n");
Daniel Macke5779992010-03-04 19:46:13 +01001037 it->empty = 1;
1038 return -EINVAL;
1039 }
1040 pmin = 125 * (1 << min_datainterval);
1041 changed = 0;
1042 if (it->min < pmin) {
1043 it->min = pmin;
1044 it->openmin = 0;
1045 changed = 1;
1046 }
1047 if (snd_interval_checkempty(it)) {
1048 it->empty = 1;
1049 return -EINVAL;
1050 }
1051 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
1052 return changed;
1053}
1054
1055/*
1056 * If the device supports unusual bit rates, does the request meet these?
1057 */
1058static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1059 struct snd_usb_substream *subs)
1060{
1061 struct audioformat *fp;
Takashi Iwai0717d0f2012-03-15 16:14:38 +01001062 int *rate_list;
Daniel Macke5779992010-03-04 19:46:13 +01001063 int count = 0, needs_knot = 0;
1064 int err;
1065
Clemens Ladisch5cd5d7c2012-05-18 18:00:43 +02001066 kfree(subs->rate_list.list);
1067 subs->rate_list.list = NULL;
1068
Daniel Macke5779992010-03-04 19:46:13 +01001069 list_for_each_entry(fp, &subs->fmt_list, list) {
1070 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1071 return 0;
1072 count += fp->nr_rates;
1073 if (fp->rates & SNDRV_PCM_RATE_KNOT)
1074 needs_knot = 1;
1075 }
1076 if (!needs_knot)
1077 return 0;
1078
Takashi Iwai0717d0f2012-03-15 16:14:38 +01001079 subs->rate_list.list = rate_list =
1080 kmalloc(sizeof(int) * count, GFP_KERNEL);
Jesper Juhl8a8d56b2010-10-29 20:40:23 +02001081 if (!subs->rate_list.list)
1082 return -ENOMEM;
1083 subs->rate_list.count = count;
Daniel Macke5779992010-03-04 19:46:13 +01001084 subs->rate_list.mask = 0;
1085 count = 0;
1086 list_for_each_entry(fp, &subs->fmt_list, list) {
1087 int i;
1088 for (i = 0; i < fp->nr_rates; i++)
Takashi Iwai0717d0f2012-03-15 16:14:38 +01001089 rate_list[count++] = fp->rate_table[i];
Daniel Macke5779992010-03-04 19:46:13 +01001090 }
1091 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1092 &subs->rate_list);
1093 if (err < 0)
1094 return err;
1095
1096 return 0;
1097}
1098
1099
1100/*
1101 * set up the runtime hardware information.
1102 */
1103
1104static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1105{
Eldad Zack88766f02013-04-03 23:18:49 +02001106 struct audioformat *fp;
Daniel Macke5779992010-03-04 19:46:13 +01001107 unsigned int pt, ptmin;
1108 int param_period_time_if_needed;
1109 int err;
1110
1111 runtime->hw.formats = subs->formats;
1112
1113 runtime->hw.rate_min = 0x7fffffff;
1114 runtime->hw.rate_max = 0;
1115 runtime->hw.channels_min = 256;
1116 runtime->hw.channels_max = 0;
1117 runtime->hw.rates = 0;
1118 ptmin = UINT_MAX;
1119 /* check min/max rates and channels */
Eldad Zack88766f02013-04-03 23:18:49 +02001120 list_for_each_entry(fp, &subs->fmt_list, list) {
Daniel Macke5779992010-03-04 19:46:13 +01001121 runtime->hw.rates |= fp->rates;
1122 if (runtime->hw.rate_min > fp->rate_min)
1123 runtime->hw.rate_min = fp->rate_min;
1124 if (runtime->hw.rate_max < fp->rate_max)
1125 runtime->hw.rate_max = fp->rate_max;
1126 if (runtime->hw.channels_min > fp->channels)
1127 runtime->hw.channels_min = fp->channels;
1128 if (runtime->hw.channels_max < fp->channels)
1129 runtime->hw.channels_max = fp->channels;
1130 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) {
1131 /* FIXME: there might be more than one audio formats... */
1132 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1133 fp->frame_size;
1134 }
1135 pt = 125 * (1 << fp->datainterval);
1136 ptmin = min(ptmin, pt);
1137 }
Oliver Neukum88a85162011-03-11 14:51:12 +01001138 err = snd_usb_autoresume(subs->stream->chip);
1139 if (err < 0)
1140 return err;
Daniel Macke5779992010-03-04 19:46:13 +01001141
1142 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
Takashi Iwai978520b2012-10-12 15:12:55 +02001143 if (subs->speed == USB_SPEED_FULL)
Daniel Macke5779992010-03-04 19:46:13 +01001144 /* full speed devices have fixed data packet interval */
1145 ptmin = 1000;
1146 if (ptmin == 1000)
1147 /* if period time doesn't go below 1 ms, no rules needed */
1148 param_period_time_if_needed = -1;
1149 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1150 ptmin, UINT_MAX);
1151
1152 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1153 hw_rule_rate, subs,
1154 SNDRV_PCM_HW_PARAM_FORMAT,
1155 SNDRV_PCM_HW_PARAM_CHANNELS,
1156 param_period_time_if_needed,
1157 -1)) < 0)
Oliver Neukum88a85162011-03-11 14:51:12 +01001158 goto rep_err;
Daniel Macke5779992010-03-04 19:46:13 +01001159 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1160 hw_rule_channels, subs,
1161 SNDRV_PCM_HW_PARAM_FORMAT,
1162 SNDRV_PCM_HW_PARAM_RATE,
1163 param_period_time_if_needed,
1164 -1)) < 0)
Oliver Neukum88a85162011-03-11 14:51:12 +01001165 goto rep_err;
Daniel Macke5779992010-03-04 19:46:13 +01001166 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1167 hw_rule_format, subs,
1168 SNDRV_PCM_HW_PARAM_RATE,
1169 SNDRV_PCM_HW_PARAM_CHANNELS,
1170 param_period_time_if_needed,
1171 -1)) < 0)
Oliver Neukum88a85162011-03-11 14:51:12 +01001172 goto rep_err;
Daniel Macke5779992010-03-04 19:46:13 +01001173 if (param_period_time_if_needed >= 0) {
1174 err = snd_pcm_hw_rule_add(runtime, 0,
1175 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1176 hw_rule_period_time, subs,
1177 SNDRV_PCM_HW_PARAM_FORMAT,
1178 SNDRV_PCM_HW_PARAM_CHANNELS,
1179 SNDRV_PCM_HW_PARAM_RATE,
1180 -1);
1181 if (err < 0)
Oliver Neukum88a85162011-03-11 14:51:12 +01001182 goto rep_err;
Daniel Macke5779992010-03-04 19:46:13 +01001183 }
1184 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
Oliver Neukum88a85162011-03-11 14:51:12 +01001185 goto rep_err;
Daniel Macke5779992010-03-04 19:46:13 +01001186 return 0;
Oliver Neukum88a85162011-03-11 14:51:12 +01001187
1188rep_err:
1189 snd_usb_autosuspend(subs->stream->chip);
1190 return err;
Daniel Macke5779992010-03-04 19:46:13 +01001191}
1192
1193static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1194{
1195 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1196 struct snd_pcm_runtime *runtime = substream->runtime;
1197 struct snd_usb_substream *subs = &as->substream[direction];
1198
1199 subs->interface = -1;
Clemens Ladische11b4e02010-03-04 19:46:14 +01001200 subs->altset_idx = 0;
Daniel Macke5779992010-03-04 19:46:13 +01001201 runtime->hw = snd_usb_hardware;
1202 runtime->private_data = subs;
1203 subs->pcm_substream = substream;
Oliver Neukum88a85162011-03-11 14:51:12 +01001204 /* runtime PM is also done there */
Daniel Mackd24f5062013-04-17 00:01:38 +08001205
1206 /* initialize DSD/DOP context */
1207 subs->dsd_dop.byte_idx = 0;
1208 subs->dsd_dop.channel = 0;
1209 subs->dsd_dop.marker = 1;
1210
Daniel Macke5779992010-03-04 19:46:13 +01001211 return setup_hw_info(runtime, subs);
1212}
1213
1214static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1215{
1216 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1217 struct snd_usb_substream *subs = &as->substream[direction];
1218
Takashi Iwaib0db6062012-11-21 08:35:42 +01001219 stop_endpoints(subs, true);
Daniel Mack68e67f42012-07-12 13:08:40 +02001220
1221 if (!as->chip->shutdown && subs->interface >= 0) {
1222 usb_set_interface(subs->dev, subs->interface, 0);
1223 subs->interface = -1;
1224 }
1225
Daniel Macke5779992010-03-04 19:46:13 +01001226 subs->pcm_substream = NULL;
Oliver Neukum88a85162011-03-11 14:51:12 +01001227 snd_usb_autosuspend(subs->stream->chip);
Daniel Mackedcd3632012-04-12 13:51:12 +02001228
Daniel Mack68e67f42012-07-12 13:08:40 +02001229 return 0;
Daniel Mackedcd3632012-04-12 13:51:12 +02001230}
1231
1232/* Since a URB can handle only a single linear buffer, we must use double
1233 * buffering when the data to be transferred overflows the buffer boundary.
1234 * To avoid inconsistencies when updating hwptr_done, we use double buffering
1235 * for all URBs.
1236 */
1237static void retire_capture_urb(struct snd_usb_substream *subs,
1238 struct urb *urb)
1239{
1240 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1241 unsigned int stride, frames, bytes, oldptr;
1242 int i, period_elapsed = 0;
1243 unsigned long flags;
1244 unsigned char *cp;
Pierre-Louis Bossarte4cc6152012-12-19 11:39:05 -06001245 int current_frame_number;
1246
1247 /* read frame number here, update pointer in critical section */
1248 current_frame_number = usb_get_current_frame_number(subs->dev);
Daniel Mackedcd3632012-04-12 13:51:12 +02001249
1250 stride = runtime->frame_bits >> 3;
1251
1252 for (i = 0; i < urb->number_of_packets; i++) {
Calvin Owens1539d4f2013-04-12 22:33:59 -05001253 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj;
Daniel Mackedcd3632012-04-12 13:51:12 +02001254 if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
Takashi Iwai0ba41d92014-02-26 13:02:17 +01001255 dev_dbg(&subs->dev->dev, "frame %d active: %d\n",
1256 i, urb->iso_frame_desc[i].status);
Daniel Mackedcd3632012-04-12 13:51:12 +02001257 // continue;
1258 }
1259 bytes = urb->iso_frame_desc[i].actual_length;
1260 frames = bytes / stride;
1261 if (!subs->txfr_quirk)
1262 bytes = frames * stride;
1263 if (bytes % (runtime->sample_bits >> 3) != 0) {
Daniel Mackedcd3632012-04-12 13:51:12 +02001264 int oldbytes = bytes;
Daniel Mackedcd3632012-04-12 13:51:12 +02001265 bytes = frames * stride;
Takashi Iwai0ba41d92014-02-26 13:02:17 +01001266 dev_warn(&subs->dev->dev,
1267 "Corrected urb data len. %d->%d\n",
Daniel Mackedcd3632012-04-12 13:51:12 +02001268 oldbytes, bytes);
1269 }
1270 /* update the current pointer */
1271 spin_lock_irqsave(&subs->lock, flags);
1272 oldptr = subs->hwptr_done;
1273 subs->hwptr_done += bytes;
1274 if (subs->hwptr_done >= runtime->buffer_size * stride)
1275 subs->hwptr_done -= runtime->buffer_size * stride;
1276 frames = (bytes + (oldptr % stride)) / stride;
1277 subs->transfer_done += frames;
1278 if (subs->transfer_done >= runtime->period_size) {
1279 subs->transfer_done -= runtime->period_size;
1280 period_elapsed = 1;
1281 }
Pierre-Louis Bossarte4cc6152012-12-19 11:39:05 -06001282 /* capture delay is by construction limited to one URB,
1283 * reset delays here
1284 */
1285 runtime->delay = subs->last_delay = 0;
1286
1287 /* realign last_frame_number */
1288 subs->last_frame_number = current_frame_number;
1289 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1290
Daniel Mackedcd3632012-04-12 13:51:12 +02001291 spin_unlock_irqrestore(&subs->lock, flags);
1292 /* copy a data chunk */
1293 if (oldptr + bytes > runtime->buffer_size * stride) {
1294 unsigned int bytes1 =
1295 runtime->buffer_size * stride - oldptr;
1296 memcpy(runtime->dma_area + oldptr, cp, bytes1);
1297 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1298 } else {
1299 memcpy(runtime->dma_area + oldptr, cp, bytes);
1300 }
1301 }
1302
1303 if (period_elapsed)
1304 snd_pcm_period_elapsed(subs->pcm_substream);
1305}
1306
Daniel Mackd24f5062013-04-17 00:01:38 +08001307static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs,
1308 struct urb *urb, unsigned int bytes)
1309{
1310 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1311 unsigned int stride = runtime->frame_bits >> 3;
1312 unsigned int dst_idx = 0;
1313 unsigned int src_idx = subs->hwptr_done;
1314 unsigned int wrap = runtime->buffer_size * stride;
1315 u8 *dst = urb->transfer_buffer;
1316 u8 *src = runtime->dma_area;
1317 u8 marker[] = { 0x05, 0xfa };
1318
1319 /*
1320 * The DSP DOP format defines a way to transport DSD samples over
1321 * normal PCM data endpoints. It requires stuffing of marker bytes
1322 * (0x05 and 0xfa, alternating per sample frame), and then expects
1323 * 2 additional bytes of actual payload. The whole frame is stored
1324 * LSB.
1325 *
1326 * Hence, for a stereo transport, the buffer layout looks like this,
1327 * where L refers to left channel samples and R to right.
1328 *
1329 * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa
1330 * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa
1331 * .....
1332 *
1333 */
1334
1335 while (bytes--) {
1336 if (++subs->dsd_dop.byte_idx == 3) {
1337 /* frame boundary? */
1338 dst[dst_idx++] = marker[subs->dsd_dop.marker];
1339 src_idx += 2;
1340 subs->dsd_dop.byte_idx = 0;
1341
1342 if (++subs->dsd_dop.channel % runtime->channels == 0) {
1343 /* alternate the marker */
1344 subs->dsd_dop.marker++;
1345 subs->dsd_dop.marker %= ARRAY_SIZE(marker);
1346 subs->dsd_dop.channel = 0;
1347 }
1348 } else {
1349 /* stuff the DSD payload */
1350 int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap;
Daniel Mack44dcbbb2013-04-17 00:01:39 +08001351
1352 if (subs->cur_audiofmt->dsd_bitrev)
1353 dst[dst_idx++] = bitrev8(src[idx]);
1354 else
1355 dst[dst_idx++] = src[idx];
1356
Daniel Mackd24f5062013-04-17 00:01:38 +08001357 subs->hwptr_done++;
1358 }
1359 }
1360}
1361
Daniel Mackedcd3632012-04-12 13:51:12 +02001362static void prepare_playback_urb(struct snd_usb_substream *subs,
1363 struct urb *urb)
1364{
1365 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
Daniel Mack245baf92012-08-30 18:52:30 +02001366 struct snd_usb_endpoint *ep = subs->data_endpoint;
Daniel Mackedcd3632012-04-12 13:51:12 +02001367 struct snd_urb_ctx *ctx = urb->context;
1368 unsigned int counts, frames, bytes;
1369 int i, stride, period_elapsed = 0;
1370 unsigned long flags;
1371
1372 stride = runtime->frame_bits >> 3;
1373
1374 frames = 0;
1375 urb->number_of_packets = 0;
1376 spin_lock_irqsave(&subs->lock, flags);
Alan Stern976b6c02013-09-24 15:51:58 -04001377 subs->frame_limit += ep->max_urb_frames;
Daniel Mackedcd3632012-04-12 13:51:12 +02001378 for (i = 0; i < ctx->packets; i++) {
Daniel Mack245baf92012-08-30 18:52:30 +02001379 if (ctx->packet_size[i])
1380 counts = ctx->packet_size[i];
1381 else
1382 counts = snd_usb_endpoint_next_packet_size(ep);
1383
Daniel Mackedcd3632012-04-12 13:51:12 +02001384 /* set up descriptor */
Daniel Mack8a2a74d2013-04-17 00:01:37 +08001385 urb->iso_frame_desc[i].offset = frames * ep->stride;
1386 urb->iso_frame_desc[i].length = counts * ep->stride;
Daniel Mackedcd3632012-04-12 13:51:12 +02001387 frames += counts;
1388 urb->number_of_packets++;
1389 subs->transfer_done += counts;
1390 if (subs->transfer_done >= runtime->period_size) {
1391 subs->transfer_done -= runtime->period_size;
Alan Stern976b6c02013-09-24 15:51:58 -04001392 subs->frame_limit = 0;
Daniel Mackedcd3632012-04-12 13:51:12 +02001393 period_elapsed = 1;
1394 if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
1395 if (subs->transfer_done > 0) {
1396 /* FIXME: fill-max mode is not
1397 * supported yet */
1398 frames -= subs->transfer_done;
1399 counts -= subs->transfer_done;
1400 urb->iso_frame_desc[i].length =
Daniel Mack8a2a74d2013-04-17 00:01:37 +08001401 counts * ep->stride;
Daniel Mackedcd3632012-04-12 13:51:12 +02001402 subs->transfer_done = 0;
1403 }
1404 i++;
1405 if (i < ctx->packets) {
1406 /* add a transfer delimiter */
1407 urb->iso_frame_desc[i].offset =
Daniel Mack8a2a74d2013-04-17 00:01:37 +08001408 frames * ep->stride;
Daniel Mackedcd3632012-04-12 13:51:12 +02001409 urb->iso_frame_desc[i].length = 0;
1410 urb->number_of_packets++;
1411 }
1412 break;
1413 }
1414 }
Alan Stern976b6c02013-09-24 15:51:58 -04001415 /* finish at the period boundary or after enough frames */
1416 if ((period_elapsed ||
1417 subs->transfer_done >= subs->frame_limit) &&
1418 !snd_usb_endpoint_implicit_feedback_sink(ep))
Daniel Mackedcd3632012-04-12 13:51:12 +02001419 break;
1420 }
Daniel Mack8a2a74d2013-04-17 00:01:37 +08001421 bytes = frames * ep->stride;
Daniel Mackd24f5062013-04-17 00:01:38 +08001422
1423 if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE &&
1424 subs->cur_audiofmt->dsd_dop)) {
1425 fill_playback_urb_dsd_dop(subs, urb, bytes);
Daniel Mack44dcbbb2013-04-17 00:01:39 +08001426 } else if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U8 &&
1427 subs->cur_audiofmt->dsd_bitrev)) {
1428 /* bit-reverse the bytes */
1429 u8 *buf = urb->transfer_buffer;
1430 for (i = 0; i < bytes; i++) {
1431 int idx = (subs->hwptr_done + i)
1432 % (runtime->buffer_size * stride);
1433 buf[i] = bitrev8(runtime->dma_area[idx]);
1434 }
1435
1436 subs->hwptr_done += bytes;
Daniel Mackedcd3632012-04-12 13:51:12 +02001437 } else {
Daniel Mackd24f5062013-04-17 00:01:38 +08001438 /* usual PCM */
1439 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
1440 /* err, the transferred area goes over buffer boundary. */
1441 unsigned int bytes1 =
1442 runtime->buffer_size * stride - subs->hwptr_done;
1443 memcpy(urb->transfer_buffer,
1444 runtime->dma_area + subs->hwptr_done, bytes1);
1445 memcpy(urb->transfer_buffer + bytes1,
1446 runtime->dma_area, bytes - bytes1);
1447 } else {
1448 memcpy(urb->transfer_buffer,
1449 runtime->dma_area + subs->hwptr_done, bytes);
1450 }
1451
1452 subs->hwptr_done += bytes;
Daniel Mackedcd3632012-04-12 13:51:12 +02001453 }
Daniel Mackd24f5062013-04-17 00:01:38 +08001454
Daniel Mackedcd3632012-04-12 13:51:12 +02001455 if (subs->hwptr_done >= runtime->buffer_size * stride)
1456 subs->hwptr_done -= runtime->buffer_size * stride;
Daniel Mackfbcfbf52012-08-30 18:52:29 +02001457
1458 /* update delay with exact number of samples queued */
1459 runtime->delay = subs->last_delay;
Daniel Mackedcd3632012-04-12 13:51:12 +02001460 runtime->delay += frames;
Daniel Mackfbcfbf52012-08-30 18:52:29 +02001461 subs->last_delay = runtime->delay;
1462
1463 /* realign last_frame_number */
1464 subs->last_frame_number = usb_get_current_frame_number(subs->dev);
1465 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
1466
Pierre-Louis Bossartea33d352015-02-06 15:55:53 -06001467 if (subs->trigger_tstamp_pending_update) {
1468 /* this is the first actual URB submitted,
1469 * update trigger timestamp to reflect actual start time
1470 */
1471 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
1472 subs->trigger_tstamp_pending_update = false;
1473 }
1474
Daniel Mackedcd3632012-04-12 13:51:12 +02001475 spin_unlock_irqrestore(&subs->lock, flags);
1476 urb->transfer_buffer_length = bytes;
1477 if (period_elapsed)
1478 snd_pcm_period_elapsed(subs->pcm_substream);
1479}
1480
1481/*
1482 * process after playback data complete
1483 * - decrease the delay count again
1484 */
1485static void retire_playback_urb(struct snd_usb_substream *subs,
1486 struct urb *urb)
1487{
1488 unsigned long flags;
1489 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
Daniel Mack8a2a74d2013-04-17 00:01:37 +08001490 struct snd_usb_endpoint *ep = subs->data_endpoint;
1491 int processed = urb->transfer_buffer_length / ep->stride;
Daniel Mackfbcfbf52012-08-30 18:52:29 +02001492 int est_delay;
Daniel Mackedcd3632012-04-12 13:51:12 +02001493
Takashi Iwai1213a202012-09-06 14:58:00 +02001494 /* ignore the delay accounting when procssed=0 is given, i.e.
1495 * silent payloads are procssed before handling the actual data
1496 */
1497 if (!processed)
1498 return;
1499
Daniel Mackedcd3632012-04-12 13:51:12 +02001500 spin_lock_irqsave(&subs->lock, flags);
Takashi Iwai48779a02012-11-23 16:00:37 +01001501 if (!subs->last_delay)
1502 goto out; /* short path */
1503
Daniel Mackfbcfbf52012-08-30 18:52:29 +02001504 est_delay = snd_usb_pcm_delay(subs, runtime->rate);
1505 /* update delay with exact number of samples played */
1506 if (processed > subs->last_delay)
1507 subs->last_delay = 0;
Daniel Mackedcd3632012-04-12 13:51:12 +02001508 else
Daniel Mackfbcfbf52012-08-30 18:52:29 +02001509 subs->last_delay -= processed;
1510 runtime->delay = subs->last_delay;
1511
1512 /*
1513 * Report when delay estimate is off by more than 2ms.
1514 * The error should be lower than 2ms since the estimate relies
1515 * on two reads of a counter updated every ms.
1516 */
Sander Eikelenboomb7a77232014-05-02 15:09:27 +02001517 if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
1518 dev_dbg_ratelimited(&subs->dev->dev,
Takashi Iwai0ba41d92014-02-26 13:02:17 +01001519 "delay: estimated %d, actual %d\n",
Daniel Mackfbcfbf52012-08-30 18:52:29 +02001520 est_delay, subs->last_delay);
1521
Takashi Iwai48779a02012-11-23 16:00:37 +01001522 if (!subs->running) {
1523 /* update last_frame_number for delay counting here since
1524 * prepare_playback_urb won't be called during pause
1525 */
1526 subs->last_frame_number =
1527 usb_get_current_frame_number(subs->dev) & 0xff;
1528 }
1529
1530 out:
Daniel Mackedcd3632012-04-12 13:51:12 +02001531 spin_unlock_irqrestore(&subs->lock, flags);
Daniel Macke5779992010-03-04 19:46:13 +01001532}
1533
1534static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1535{
1536 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1537}
1538
1539static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1540{
1541 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1542}
1543
1544static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1545{
1546 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1547}
1548
1549static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1550{
1551 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1552}
1553
Daniel Mackedcd3632012-04-12 13:51:12 +02001554static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
1555 int cmd)
1556{
1557 struct snd_usb_substream *subs = substream->runtime->private_data;
1558
1559 switch (cmd) {
1560 case SNDRV_PCM_TRIGGER_START:
Pierre-Louis Bossartea33d352015-02-06 15:55:53 -06001561 subs->trigger_tstamp_pending_update = true;
Daniel Mackedcd3632012-04-12 13:51:12 +02001562 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1563 subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
1564 subs->data_endpoint->retire_data_urb = retire_playback_urb;
Daniel Mack97f8d3b2012-05-21 12:47:36 +02001565 subs->running = 1;
Daniel Mackedcd3632012-04-12 13:51:12 +02001566 return 0;
1567 case SNDRV_PCM_TRIGGER_STOP:
Takashi Iwaia9bb3622012-11-20 18:32:06 +01001568 stop_endpoints(subs, false);
Daniel Mack97f8d3b2012-05-21 12:47:36 +02001569 subs->running = 0;
Daniel Mackedcd3632012-04-12 13:51:12 +02001570 return 0;
1571 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1572 subs->data_endpoint->prepare_data_urb = NULL;
Takashi Iwai48779a02012-11-23 16:00:37 +01001573 /* keep retire_data_urb for delay calculation */
1574 subs->data_endpoint->retire_data_urb = retire_playback_urb;
Daniel Mack97f8d3b2012-05-21 12:47:36 +02001575 subs->running = 0;
Daniel Mackedcd3632012-04-12 13:51:12 +02001576 return 0;
1577 }
1578
1579 return -EINVAL;
1580}
1581
Daniel Mackafe25962012-06-16 16:58:04 +02001582static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream,
1583 int cmd)
Daniel Mackedcd3632012-04-12 13:51:12 +02001584{
1585 int err;
1586 struct snd_usb_substream *subs = substream->runtime->private_data;
1587
1588 switch (cmd) {
1589 case SNDRV_PCM_TRIGGER_START:
Takashi Iwaia9bb3622012-11-20 18:32:06 +01001590 err = start_endpoints(subs, false);
Daniel Mackedcd3632012-04-12 13:51:12 +02001591 if (err < 0)
1592 return err;
1593
1594 subs->data_endpoint->retire_data_urb = retire_capture_urb;
Daniel Mack97f8d3b2012-05-21 12:47:36 +02001595 subs->running = 1;
Daniel Mackedcd3632012-04-12 13:51:12 +02001596 return 0;
1597 case SNDRV_PCM_TRIGGER_STOP:
Takashi Iwaia9bb3622012-11-20 18:32:06 +01001598 stop_endpoints(subs, false);
Daniel Mack97f8d3b2012-05-21 12:47:36 +02001599 subs->running = 0;
Daniel Mackedcd3632012-04-12 13:51:12 +02001600 return 0;
1601 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1602 subs->data_endpoint->retire_data_urb = NULL;
Daniel Mack97f8d3b2012-05-21 12:47:36 +02001603 subs->running = 0;
Daniel Mackedcd3632012-04-12 13:51:12 +02001604 return 0;
1605 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1606 subs->data_endpoint->retire_data_urb = retire_capture_urb;
Daniel Mack97f8d3b2012-05-21 12:47:36 +02001607 subs->running = 1;
Daniel Mackedcd3632012-04-12 13:51:12 +02001608 return 0;
1609 }
1610
1611 return -EINVAL;
1612}
1613
Daniel Macke5779992010-03-04 19:46:13 +01001614static struct snd_pcm_ops snd_usb_playback_ops = {
1615 .open = snd_usb_playback_open,
1616 .close = snd_usb_playback_close,
1617 .ioctl = snd_pcm_lib_ioctl,
1618 .hw_params = snd_usb_hw_params,
1619 .hw_free = snd_usb_hw_free,
1620 .prepare = snd_usb_pcm_prepare,
1621 .trigger = snd_usb_substream_playback_trigger,
1622 .pointer = snd_usb_pcm_pointer,
1623 .page = snd_pcm_lib_get_vmalloc_page,
1624 .mmap = snd_pcm_lib_mmap_vmalloc,
1625};
1626
1627static struct snd_pcm_ops snd_usb_capture_ops = {
1628 .open = snd_usb_capture_open,
1629 .close = snd_usb_capture_close,
1630 .ioctl = snd_pcm_lib_ioctl,
1631 .hw_params = snd_usb_hw_params,
1632 .hw_free = snd_usb_hw_free,
1633 .prepare = snd_usb_pcm_prepare,
1634 .trigger = snd_usb_substream_capture_trigger,
1635 .pointer = snd_usb_pcm_pointer,
1636 .page = snd_pcm_lib_get_vmalloc_page,
1637 .mmap = snd_pcm_lib_mmap_vmalloc,
1638};
1639
1640void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
1641{
1642 snd_pcm_set_ops(pcm, stream,
1643 stream == SNDRV_PCM_STREAM_PLAYBACK ?
1644 &snd_usb_playback_ops : &snd_usb_capture_ops);
1645}