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TOMOYO Linux Cross Reference
Linux/sound/usb/quirks.c

Version: ~ [ linux-5.4.2 ] ~ [ linux-5.3.15 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.88 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.158 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.206 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.206 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.78 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  *   This program is free software; you can redistribute it and/or modify
  3  *   it under the terms of the GNU General Public License as published by
  4  *   the Free Software Foundation; either version 2 of the License, or
  5  *   (at your option) any later version.
  6  *
  7  *   This program is distributed in the hope that it will be useful,
  8  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  9  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 10  *   GNU General Public License for more details.
 11  *
 12  *   You should have received a copy of the GNU General Public License
 13  *   along with this program; if not, write to the Free Software
 14  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 15  */
 16 
 17 #include <linux/init.h>
 18 #include <linux/slab.h>
 19 #include <linux/usb.h>
 20 #include <linux/usb/audio.h>
 21 #include <linux/usb/midi.h>
 22 
 23 #include <sound/control.h>
 24 #include <sound/core.h>
 25 #include <sound/info.h>
 26 #include <sound/pcm.h>
 27 
 28 #include "usbaudio.h"
 29 #include "card.h"
 30 #include "mixer.h"
 31 #include "mixer_quirks.h"
 32 #include "midi.h"
 33 #include "quirks.h"
 34 #include "helper.h"
 35 #include "endpoint.h"
 36 #include "pcm.h"
 37 #include "clock.h"
 38 #include "stream.h"
 39 
 40 /*
 41  * handle the quirks for the contained interfaces
 42  */
 43 static int create_composite_quirk(struct snd_usb_audio *chip,
 44                                   struct usb_interface *iface,
 45                                   struct usb_driver *driver,
 46                                   const struct snd_usb_audio_quirk *quirk)
 47 {
 48         int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
 49         int err;
 50 
 51         for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
 52                 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
 53                 if (!iface)
 54                         continue;
 55                 if (quirk->ifnum != probed_ifnum &&
 56                     usb_interface_claimed(iface))
 57                         continue;
 58                 err = snd_usb_create_quirk(chip, iface, driver, quirk);
 59                 if (err < 0)
 60                         return err;
 61                 if (quirk->ifnum != probed_ifnum)
 62                         usb_driver_claim_interface(driver, iface, (void *)-1L);
 63         }
 64         return 0;
 65 }
 66 
 67 static int ignore_interface_quirk(struct snd_usb_audio *chip,
 68                                   struct usb_interface *iface,
 69                                   struct usb_driver *driver,
 70                                   const struct snd_usb_audio_quirk *quirk)
 71 {
 72         return 0;
 73 }
 74 
 75 
 76 /*
 77  * Allow alignment on audio sub-slot (channel samples) rather than
 78  * on audio slots (audio frames)
 79  */
 80 static int create_align_transfer_quirk(struct snd_usb_audio *chip,
 81                                        struct usb_interface *iface,
 82                                        struct usb_driver *driver,
 83                                        const struct snd_usb_audio_quirk *quirk)
 84 {
 85         chip->txfr_quirk = 1;
 86         return 1;       /* Continue with creating streams and mixer */
 87 }
 88 
 89 static int create_any_midi_quirk(struct snd_usb_audio *chip,
 90                                  struct usb_interface *intf,
 91                                  struct usb_driver *driver,
 92                                  const struct snd_usb_audio_quirk *quirk)
 93 {
 94         return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
 95 }
 96 
 97 /*
 98  * create a stream for an interface with proper descriptors
 99  */
100 static int create_standard_audio_quirk(struct snd_usb_audio *chip,
101                                        struct usb_interface *iface,
102                                        struct usb_driver *driver,
103                                        const struct snd_usb_audio_quirk *quirk)
104 {
105         struct usb_host_interface *alts;
106         struct usb_interface_descriptor *altsd;
107         int err;
108 
109         alts = &iface->altsetting[0];
110         altsd = get_iface_desc(alts);
111         err = snd_usb_parse_audio_interface(chip, altsd->bInterfaceNumber);
112         if (err < 0) {
113                 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
114                            altsd->bInterfaceNumber, err);
115                 return err;
116         }
117         /* reset the current interface */
118         usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
119         return 0;
120 }
121 
122 /*
123  * create a stream for an endpoint/altsetting without proper descriptors
124  */
125 static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
126                                      struct usb_interface *iface,
127                                      struct usb_driver *driver,
128                                      const struct snd_usb_audio_quirk *quirk)
129 {
130         struct audioformat *fp;
131         struct usb_host_interface *alts;
132         struct usb_interface_descriptor *altsd;
133         int stream, err;
134         unsigned *rate_table = NULL;
135 
136         fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
137         if (!fp) {
138                 snd_printk(KERN_ERR "cannot memdup\n");
139                 return -ENOMEM;
140         }
141         INIT_LIST_HEAD(&fp->list);
142         if (fp->nr_rates > MAX_NR_RATES) {
143                 kfree(fp);
144                 return -EINVAL;
145         }
146         if (fp->nr_rates > 0) {
147                 rate_table = kmemdup(fp->rate_table,
148                                      sizeof(int) * fp->nr_rates, GFP_KERNEL);
149                 if (!rate_table) {
150                         kfree(fp);
151                         return -ENOMEM;
152                 }
153                 fp->rate_table = rate_table;
154         }
155 
156         stream = (fp->endpoint & USB_DIR_IN)
157                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
158         err = snd_usb_add_audio_stream(chip, stream, fp);
159         if (err < 0)
160                 goto error;
161         if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
162             fp->altset_idx >= iface->num_altsetting) {
163                 err = -EINVAL;
164                 goto error;
165         }
166         alts = &iface->altsetting[fp->altset_idx];
167         altsd = get_iface_desc(alts);
168         if (altsd->bNumEndpoints < 1) {
169                 err = -EINVAL;
170                 goto error;
171         }
172 
173         fp->protocol = altsd->bInterfaceProtocol;
174 
175         if (fp->datainterval == 0)
176                 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
177         if (fp->maxpacksize == 0)
178                 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
179         usb_set_interface(chip->dev, fp->iface, 0);
180         snd_usb_init_pitch(chip, fp->iface, alts, fp);
181         snd_usb_init_sample_rate(chip, fp->iface, alts, fp, fp->rate_max);
182         return 0;
183 
184  error:
185         list_del(&fp->list); /* unlink for avoiding double-free */
186         kfree(fp);
187         kfree(rate_table);
188         return err;
189 }
190 
191 static int create_auto_pcm_quirk(struct snd_usb_audio *chip,
192                                  struct usb_interface *iface,
193                                  struct usb_driver *driver)
194 {
195         struct usb_host_interface *alts;
196         struct usb_interface_descriptor *altsd;
197         struct usb_endpoint_descriptor *epd;
198         struct uac1_as_header_descriptor *ashd;
199         struct uac_format_type_i_discrete_descriptor *fmtd;
200 
201         /*
202          * Most Roland/Yamaha audio streaming interfaces have more or less
203          * standard descriptors, but older devices might lack descriptors, and
204          * future ones might change, so ensure that we fail silently if the
205          * interface doesn't look exactly right.
206          */
207 
208         /* must have a non-zero altsetting for streaming */
209         if (iface->num_altsetting < 2)
210                 return -ENODEV;
211         alts = &iface->altsetting[1];
212         altsd = get_iface_desc(alts);
213 
214         /* must have an isochronous endpoint for streaming */
215         if (altsd->bNumEndpoints < 1)
216                 return -ENODEV;
217         epd = get_endpoint(alts, 0);
218         if (!usb_endpoint_xfer_isoc(epd))
219                 return -ENODEV;
220 
221         /* must have format descriptors */
222         ashd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
223                                        UAC_AS_GENERAL);
224         fmtd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
225                                        UAC_FORMAT_TYPE);
226         if (!ashd || ashd->bLength < 7 ||
227             !fmtd || fmtd->bLength < 8)
228                 return -ENODEV;
229 
230         return create_standard_audio_quirk(chip, iface, driver, NULL);
231 }
232 
233 static int create_yamaha_midi_quirk(struct snd_usb_audio *chip,
234                                     struct usb_interface *iface,
235                                     struct usb_driver *driver,
236                                     struct usb_host_interface *alts)
237 {
238         static const struct snd_usb_audio_quirk yamaha_midi_quirk = {
239                 .type = QUIRK_MIDI_YAMAHA
240         };
241         struct usb_midi_in_jack_descriptor *injd;
242         struct usb_midi_out_jack_descriptor *outjd;
243 
244         /* must have some valid jack descriptors */
245         injd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
246                                        NULL, USB_MS_MIDI_IN_JACK);
247         outjd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
248                                         NULL, USB_MS_MIDI_OUT_JACK);
249         if (!injd && !outjd)
250                 return -ENODEV;
251         if (injd && (injd->bLength < 5 ||
252                      (injd->bJackType != USB_MS_EMBEDDED &&
253                       injd->bJackType != USB_MS_EXTERNAL)))
254                 return -ENODEV;
255         if (outjd && (outjd->bLength < 6 ||
256                       (outjd->bJackType != USB_MS_EMBEDDED &&
257                        outjd->bJackType != USB_MS_EXTERNAL)))
258                 return -ENODEV;
259         return create_any_midi_quirk(chip, iface, driver, &yamaha_midi_quirk);
260 }
261 
262 static int create_roland_midi_quirk(struct snd_usb_audio *chip,
263                                     struct usb_interface *iface,
264                                     struct usb_driver *driver,
265                                     struct usb_host_interface *alts)
266 {
267         static const struct snd_usb_audio_quirk roland_midi_quirk = {
268                 .type = QUIRK_MIDI_ROLAND
269         };
270         u8 *roland_desc = NULL;
271 
272         /* might have a vendor-specific descriptor <06 24 F1 02 ...> */
273         for (;;) {
274                 roland_desc = snd_usb_find_csint_desc(alts->extra,
275                                                       alts->extralen,
276                                                       roland_desc, 0xf1);
277                 if (!roland_desc)
278                         return -ENODEV;
279                 if (roland_desc[0] < 6 || roland_desc[3] != 2)
280                         continue;
281                 return create_any_midi_quirk(chip, iface, driver,
282                                              &roland_midi_quirk);
283         }
284 }
285 
286 static int create_std_midi_quirk(struct snd_usb_audio *chip,
287                                  struct usb_interface *iface,
288                                  struct usb_driver *driver,
289                                  struct usb_host_interface *alts)
290 {
291         struct usb_ms_header_descriptor *mshd;
292         struct usb_ms_endpoint_descriptor *msepd;
293 
294         /* must have the MIDIStreaming interface header descriptor*/
295         mshd = (struct usb_ms_header_descriptor *)alts->extra;
296         if (alts->extralen < 7 ||
297             mshd->bLength < 7 ||
298             mshd->bDescriptorType != USB_DT_CS_INTERFACE ||
299             mshd->bDescriptorSubtype != USB_MS_HEADER)
300                 return -ENODEV;
301         /* must have the MIDIStreaming endpoint descriptor*/
302         msepd = (struct usb_ms_endpoint_descriptor *)alts->endpoint[0].extra;
303         if (alts->endpoint[0].extralen < 4 ||
304             msepd->bLength < 4 ||
305             msepd->bDescriptorType != USB_DT_CS_ENDPOINT ||
306             msepd->bDescriptorSubtype != UAC_MS_GENERAL ||
307             msepd->bNumEmbMIDIJack < 1 ||
308             msepd->bNumEmbMIDIJack > 16)
309                 return -ENODEV;
310 
311         return create_any_midi_quirk(chip, iface, driver, NULL);
312 }
313 
314 static int create_auto_midi_quirk(struct snd_usb_audio *chip,
315                                   struct usb_interface *iface,
316                                   struct usb_driver *driver)
317 {
318         struct usb_host_interface *alts;
319         struct usb_interface_descriptor *altsd;
320         struct usb_endpoint_descriptor *epd;
321         int err;
322 
323         alts = &iface->altsetting[0];
324         altsd = get_iface_desc(alts);
325 
326         /* must have at least one bulk/interrupt endpoint for streaming */
327         if (altsd->bNumEndpoints < 1)
328                 return -ENODEV;
329         epd = get_endpoint(alts, 0);
330         if (!usb_endpoint_xfer_bulk(epd) &&
331             !usb_endpoint_xfer_int(epd))
332                 return -ENODEV;
333 
334         switch (USB_ID_VENDOR(chip->usb_id)) {
335         case 0x0499: /* Yamaha */
336                 err = create_yamaha_midi_quirk(chip, iface, driver, alts);
337                 if (err != -ENODEV)
338                         return err;
339                 break;
340         case 0x0582: /* Roland */
341                 err = create_roland_midi_quirk(chip, iface, driver, alts);
342                 if (err != -ENODEV)
343                         return err;
344                 break;
345         }
346 
347         return create_std_midi_quirk(chip, iface, driver, alts);
348 }
349 
350 static int create_autodetect_quirk(struct snd_usb_audio *chip,
351                                    struct usb_interface *iface,
352                                    struct usb_driver *driver)
353 {
354         int err;
355 
356         err = create_auto_pcm_quirk(chip, iface, driver);
357         if (err == -ENODEV)
358                 err = create_auto_midi_quirk(chip, iface, driver);
359         return err;
360 }
361 
362 static int create_autodetect_quirks(struct snd_usb_audio *chip,
363                                     struct usb_interface *iface,
364                                     struct usb_driver *driver,
365                                     const struct snd_usb_audio_quirk *quirk)
366 {
367         int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
368         int ifcount, ifnum, err;
369 
370         err = create_autodetect_quirk(chip, iface, driver);
371         if (err < 0)
372                 return err;
373 
374         /*
375          * ALSA PCM playback/capture devices cannot be registered in two steps,
376          * so we have to claim the other corresponding interface here.
377          */
378         ifcount = chip->dev->actconfig->desc.bNumInterfaces;
379         for (ifnum = 0; ifnum < ifcount; ifnum++) {
380                 if (ifnum == probed_ifnum || quirk->ifnum >= 0)
381                         continue;
382                 iface = usb_ifnum_to_if(chip->dev, ifnum);
383                 if (!iface ||
384                     usb_interface_claimed(iface) ||
385                     get_iface_desc(iface->altsetting)->bInterfaceClass !=
386                                                         USB_CLASS_VENDOR_SPEC)
387                         continue;
388 
389                 err = create_autodetect_quirk(chip, iface, driver);
390                 if (err >= 0)
391                         usb_driver_claim_interface(driver, iface, (void *)-1L);
392         }
393 
394         return 0;
395 }
396 
397 /*
398  * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.  
399  * The only way to detect the sample rate is by looking at wMaxPacketSize.
400  */
401 static int create_uaxx_quirk(struct snd_usb_audio *chip,
402                              struct usb_interface *iface,
403                              struct usb_driver *driver,
404                              const struct snd_usb_audio_quirk *quirk)
405 {
406         static const struct audioformat ua_format = {
407                 .formats = SNDRV_PCM_FMTBIT_S24_3LE,
408                 .channels = 2,
409                 .fmt_type = UAC_FORMAT_TYPE_I,
410                 .altsetting = 1,
411                 .altset_idx = 1,
412                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
413         };
414         struct usb_host_interface *alts;
415         struct usb_interface_descriptor *altsd;
416         struct audioformat *fp;
417         int stream, err;
418 
419         /* both PCM and MIDI interfaces have 2 or more altsettings */
420         if (iface->num_altsetting < 2)
421                 return -ENXIO;
422         alts = &iface->altsetting[1];
423         altsd = get_iface_desc(alts);
424 
425         if (altsd->bNumEndpoints == 2) {
426                 static const struct snd_usb_midi_endpoint_info ua700_ep = {
427                         .out_cables = 0x0003,
428                         .in_cables  = 0x0003
429                 };
430                 static const struct snd_usb_audio_quirk ua700_quirk = {
431                         .type = QUIRK_MIDI_FIXED_ENDPOINT,
432                         .data = &ua700_ep
433                 };
434                 static const struct snd_usb_midi_endpoint_info uaxx_ep = {
435                         .out_cables = 0x0001,
436                         .in_cables  = 0x0001
437                 };
438                 static const struct snd_usb_audio_quirk uaxx_quirk = {
439                         .type = QUIRK_MIDI_FIXED_ENDPOINT,
440                         .data = &uaxx_ep
441                 };
442                 const struct snd_usb_audio_quirk *quirk =
443                         chip->usb_id == USB_ID(0x0582, 0x002b)
444                         ? &ua700_quirk : &uaxx_quirk;
445                 return snd_usbmidi_create(chip->card, iface,
446                                           &chip->midi_list, quirk);
447         }
448 
449         if (altsd->bNumEndpoints != 1)
450                 return -ENXIO;
451 
452         fp = kmemdup(&ua_format, sizeof(*fp), GFP_KERNEL);
453         if (!fp)
454                 return -ENOMEM;
455 
456         fp->iface = altsd->bInterfaceNumber;
457         fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
458         fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
459         fp->datainterval = 0;
460         fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
461         INIT_LIST_HEAD(&fp->list);
462 
463         switch (fp->maxpacksize) {
464         case 0x120:
465                 fp->rate_max = fp->rate_min = 44100;
466                 break;
467         case 0x138:
468         case 0x140:
469                 fp->rate_max = fp->rate_min = 48000;
470                 break;
471         case 0x258:
472         case 0x260:
473                 fp->rate_max = fp->rate_min = 96000;
474                 break;
475         default:
476                 snd_printk(KERN_ERR "unknown sample rate\n");
477                 kfree(fp);
478                 return -ENXIO;
479         }
480 
481         stream = (fp->endpoint & USB_DIR_IN)
482                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
483         err = snd_usb_add_audio_stream(chip, stream, fp);
484         if (err < 0) {
485                 list_del(&fp->list); /* unlink for avoiding double-free */
486                 kfree(fp);
487                 return err;
488         }
489         usb_set_interface(chip->dev, fp->iface, 0);
490         return 0;
491 }
492 
493 /*
494  * Create a standard mixer for the specified interface.
495  */
496 static int create_standard_mixer_quirk(struct snd_usb_audio *chip,
497                                        struct usb_interface *iface,
498                                        struct usb_driver *driver,
499                                        const struct snd_usb_audio_quirk *quirk)
500 {
501         if (quirk->ifnum < 0)
502                 return 0;
503 
504         return snd_usb_create_mixer(chip, quirk->ifnum, 0);
505 }
506 
507 /*
508  * audio-interface quirks
509  *
510  * returns zero if no standard audio/MIDI parsing is needed.
511  * returns a positive value if standard audio/midi interfaces are parsed
512  * after this.
513  * returns a negative value at error.
514  */
515 int snd_usb_create_quirk(struct snd_usb_audio *chip,
516                          struct usb_interface *iface,
517                          struct usb_driver *driver,
518                          const struct snd_usb_audio_quirk *quirk)
519 {
520         typedef int (*quirk_func_t)(struct snd_usb_audio *,
521                                     struct usb_interface *,
522                                     struct usb_driver *,
523                                     const struct snd_usb_audio_quirk *);
524         static const quirk_func_t quirk_funcs[] = {
525                 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
526                 [QUIRK_COMPOSITE] = create_composite_quirk,
527                 [QUIRK_AUTODETECT] = create_autodetect_quirks,
528                 [QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
529                 [QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
530                 [QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
531                 [QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
532                 [QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
533                 [QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
534                 [QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
535                 [QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
536                 [QUIRK_MIDI_CME] = create_any_midi_quirk,
537                 [QUIRK_MIDI_AKAI] = create_any_midi_quirk,
538                 [QUIRK_MIDI_FTDI] = create_any_midi_quirk,
539                 [QUIRK_MIDI_CH345] = create_any_midi_quirk,
540                 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
541                 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
542                 [QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
543                 [QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
544                 [QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
545         };
546 
547         if (quirk->type < QUIRK_TYPE_COUNT) {
548                 return quirk_funcs[quirk->type](chip, iface, driver, quirk);
549         } else {
550                 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
551                 return -ENXIO;
552         }
553 }
554 
555 /*
556  * boot quirks
557  */
558 
559 #define EXTIGY_FIRMWARE_SIZE_OLD 794
560 #define EXTIGY_FIRMWARE_SIZE_NEW 483
561 
562 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
563 {
564         struct usb_host_config *config = dev->actconfig;
565         int err;
566 
567         if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
568             le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
569                 snd_printdd("sending Extigy boot sequence...\n");
570                 /* Send message to force it to reconnect with full interface. */
571                 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
572                                       0x10, 0x43, 0x0001, 0x000a, NULL, 0);
573                 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
574                 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
575                                 &dev->descriptor, sizeof(dev->descriptor));
576                 config = dev->actconfig;
577                 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
578                 err = usb_reset_configuration(dev);
579                 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
580                 snd_printdd("extigy_boot: new boot length = %d\n",
581                             le16_to_cpu(get_cfg_desc(config)->wTotalLength));
582                 return -ENODEV; /* quit this anyway */
583         }
584         return 0;
585 }
586 
587 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
588 {
589         u8 buf = 1;
590 
591         snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
592                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
593                         0, 0, &buf, 1);
594         if (buf == 0) {
595                 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
596                                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
597                                 1, 2000, NULL, 0);
598                 return -ENODEV;
599         }
600         return 0;
601 }
602 
603 static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
604 {
605         int err;
606 
607         if (dev->actconfig->desc.bConfigurationValue == 1) {
608                 snd_printk(KERN_INFO "usb-audio: "
609                            "Fast Track Pro switching to config #2\n");
610                 /* This function has to be available by the usb core module.
611                  * if it is not avialable the boot quirk has to be left out
612                  * and the configuration has to be set by udev or hotplug
613                  * rules
614                  */
615                 err = usb_driver_set_configuration(dev, 2);
616                 if (err < 0)
617                         snd_printdd("error usb_driver_set_configuration: %d\n",
618                                     err);
619                 /* Always return an error, so that we stop creating a device
620                    that will just be destroyed and recreated with a new
621                    configuration */
622                 return -ENODEV;
623         } else
624                 snd_printk(KERN_INFO "usb-audio: Fast Track Pro config OK\n");
625 
626         return 0;
627 }
628 
629 /*
630  * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
631  * documented in the device's data sheet.
632  */
633 static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
634 {
635         u8 buf[4];
636         buf[0] = 0x20;
637         buf[1] = value & 0xff;
638         buf[2] = (value >> 8) & 0xff;
639         buf[3] = reg;
640         return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
641                                USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
642                                0, 0, &buf, 4);
643 }
644 
645 static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
646 {
647         /*
648          * Enable line-out driver mode, set headphone source to front
649          * channels, enable stereo mic.
650          */
651         return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
652 }
653 
654 /*
655  * C-Media CM6206 is based on CM106 with two additional
656  * registers that are not documented in the data sheet.
657  * Values here are chosen based on sniffing USB traffic
658  * under Windows.
659  */
660 static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
661 {
662         int err  = 0, reg;
663         int val[] = {0x2004, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
664 
665         for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
666                 err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
667                 if (err < 0)
668                         return err;
669         }
670 
671         return err;
672 }
673 
674 /*
675  * Novation Twitch DJ controller
676  * Focusrite Novation Saffire 6 USB audio card
677  */
678 static int snd_usb_novation_boot_quirk(struct usb_device *dev)
679 {
680         /* preemptively set up the device because otherwise the
681          * raw MIDI endpoints are not active */
682         usb_set_interface(dev, 0, 1);
683         return 0;
684 }
685 
686 /*
687  * This call will put the synth in "USB send" mode, i.e it will send MIDI
688  * messages through USB (this is disabled at startup). The synth will
689  * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
690  * sign on its LCD. Values here are chosen based on sniffing USB traffic
691  * under Windows.
692  */
693 static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
694 {
695         int err, actual_length;
696 
697         /* "midi send" enable */
698         static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
699 
700         void *buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
701         if (!buf)
702                 return -ENOMEM;
703         err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
704                         ARRAY_SIZE(seq), &actual_length, 1000);
705         kfree(buf);
706         if (err < 0)
707                 return err;
708 
709         return 0;
710 }
711 
712 /*
713  * Some sound cards from Native Instruments are in fact compliant to the USB
714  * audio standard of version 2 and other approved USB standards, even though
715  * they come up as vendor-specific device when first connected.
716  *
717  * However, they can be told to come up with a new set of descriptors
718  * upon their next enumeration, and the interfaces announced by the new
719  * descriptors will then be handled by the kernel's class drivers. As the
720  * product ID will also change, no further checks are required.
721  */
722 
723 static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
724 {
725         int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
726                                   0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
727                                   1, 0, NULL, 0, 1000);
728 
729         if (ret < 0)
730                 return ret;
731 
732         usb_reset_device(dev);
733 
734         /* return -EAGAIN, so the creation of an audio interface for this
735          * temporary device is aborted. The device will reconnect with a
736          * new product ID */
737         return -EAGAIN;
738 }
739 
740 static void mbox2_setup_48_24_magic(struct usb_device *dev)
741 {
742         u8 srate[3];
743         u8 temp[12];
744 
745         /* Choose 48000Hz permanently */
746         srate[0] = 0x80;
747         srate[1] = 0xbb;
748         srate[2] = 0x00;
749 
750         /* Send the magic! */
751         snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
752                 0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
753         snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
754                 0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
755         snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
756                 0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
757         snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
758                 0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
759         return;
760 }
761 
762 /* Digidesign Mbox 2 needs to load firmware onboard
763  * and driver must wait a few seconds for initialisation.
764  */
765 
766 #define MBOX2_FIRMWARE_SIZE    646
767 #define MBOX2_BOOT_LOADING     0x01 /* Hard coded into the device */
768 #define MBOX2_BOOT_READY       0x02 /* Hard coded into the device */
769 
770 static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
771 {
772         struct usb_host_config *config = dev->actconfig;
773         int err;
774         u8 bootresponse[0x12];
775         int fwsize;
776         int count;
777 
778         fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);
779 
780         if (fwsize != MBOX2_FIRMWARE_SIZE) {
781                 snd_printk(KERN_ERR "usb-audio: Invalid firmware size=%d.\n", fwsize);
782                 return -ENODEV;
783         }
784 
785         snd_printd("usb-audio: Sending Digidesign Mbox 2 boot sequence...\n");
786 
787         count = 0;
788         bootresponse[0] = MBOX2_BOOT_LOADING;
789         while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
790                 msleep(500); /* 0.5 second delay */
791                 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
792                         /* Control magic - load onboard firmware */
793                         0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
794                 if (bootresponse[0] == MBOX2_BOOT_READY)
795                         break;
796                 snd_printd("usb-audio: device not ready, resending boot sequence...\n");
797                 count++;
798         }
799 
800         if (bootresponse[0] != MBOX2_BOOT_READY) {
801                 snd_printk(KERN_ERR "usb-audio: Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
802                 return -ENODEV;
803         }
804 
805         snd_printdd("usb-audio: device initialised!\n");
806 
807         err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
808                 &dev->descriptor, sizeof(dev->descriptor));
809         config = dev->actconfig;
810         if (err < 0)
811                 snd_printd("error usb_get_descriptor: %d\n", err);
812 
813         err = usb_reset_configuration(dev);
814         if (err < 0)
815                 snd_printd("error usb_reset_configuration: %d\n", err);
816         snd_printdd("mbox2_boot: new boot length = %d\n",
817                 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
818 
819         mbox2_setup_48_24_magic(dev);
820 
821         snd_printk(KERN_INFO "usb-audio: Digidesign Mbox 2: 24bit 48kHz");
822 
823         return 0; /* Successful boot */
824 }
825 
826 /*
827  * Setup quirks
828  */
829 #define MAUDIO_SET              0x01 /* parse device_setup */
830 #define MAUDIO_SET_COMPATIBLE   0x80 /* use only "win-compatible" interfaces */
831 #define MAUDIO_SET_DTS          0x02 /* enable DTS Digital Output */
832 #define MAUDIO_SET_96K          0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
833 #define MAUDIO_SET_24B          0x08 /* 24bits sample if set, 16bits otherwise */
834 #define MAUDIO_SET_DI           0x10 /* enable Digital Input */
835 #define MAUDIO_SET_MASK         0x1f /* bit mask for setup value */
836 #define MAUDIO_SET_24B_48K_DI    0x19 /* 24bits+48KHz+Digital Input */
837 #define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48KHz+No Digital Input */
838 #define MAUDIO_SET_16B_48K_DI    0x11 /* 16bits+48KHz+Digital Input */
839 #define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48KHz+No Digital Input */
840 
841 static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
842                                       int iface, int altno)
843 {
844         /* Reset ALL ifaces to 0 altsetting.
845          * Call it for every possible altsetting of every interface.
846          */
847         usb_set_interface(chip->dev, iface, 0);
848         if (chip->setup & MAUDIO_SET) {
849                 if (chip->setup & MAUDIO_SET_COMPATIBLE) {
850                         if (iface != 1 && iface != 2)
851                                 return 1; /* skip all interfaces but 1 and 2 */
852                 } else {
853                         unsigned int mask;
854                         if (iface == 1 || iface == 2)
855                                 return 1; /* skip interfaces 1 and 2 */
856                         if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
857                                 return 1; /* skip this altsetting */
858                         mask = chip->setup & MAUDIO_SET_MASK;
859                         if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
860                                 return 1; /* skip this altsetting */
861                         if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
862                                 return 1; /* skip this altsetting */
863                         if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
864                                 return 1; /* skip this altsetting */
865                 }
866         }
867         snd_printdd(KERN_INFO
868                     "using altsetting %d for interface %d config %d\n",
869                     altno, iface, chip->setup);
870         return 0; /* keep this altsetting */
871 }
872 
873 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
874                                          int iface,
875                                          int altno)
876 {
877         /* Reset ALL ifaces to 0 altsetting.
878          * Call it for every possible altsetting of every interface.
879          */
880         usb_set_interface(chip->dev, iface, 0);
881 
882         if (chip->setup & MAUDIO_SET) {
883                 unsigned int mask;
884                 if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
885                         return 1; /* skip this altsetting */
886                 if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
887                         return 1; /* skip this altsetting */
888                 mask = chip->setup & MAUDIO_SET_MASK;
889                 if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
890                         return 1; /* skip this altsetting */
891                 if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
892                         return 1; /* skip this altsetting */
893                 if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
894                         return 1; /* skip this altsetting */
895                 if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
896                         return 1; /* skip this altsetting */
897         }
898 
899         return 0; /* keep this altsetting */
900 }
901 
902 static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
903                                            int iface, int altno)
904 {
905         /* Reset ALL ifaces to 0 altsetting.
906          * Call it for every possible altsetting of every interface.
907          */
908         usb_set_interface(chip->dev, iface, 0);
909 
910         /* possible configuration where both inputs and only one output is
911          *used is not supported by the current setup
912          */
913         if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
914                 if (chip->setup & MAUDIO_SET_96K) {
915                         if (altno != 3 && altno != 6)
916                                 return 1;
917                 } else if (chip->setup & MAUDIO_SET_DI) {
918                         if (iface == 4)
919                                 return 1; /* no analog input */
920                         if (altno != 2 && altno != 5)
921                                 return 1; /* enable only altsets 2 and 5 */
922                 } else {
923                         if (iface == 5)
924                                 return 1; /* disable digialt input */
925                         if (altno != 2 && altno != 5)
926                                 return 1; /* enalbe only altsets 2 and 5 */
927                 }
928         } else {
929                 /* keep only 16-Bit mode */
930                 if (altno != 1)
931                         return 1;
932         }
933 
934         snd_printdd(KERN_INFO
935                     "using altsetting %d for interface %d config %d\n",
936                     altno, iface, chip->setup);
937         return 0; /* keep this altsetting */
938 }
939 
940 int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
941                                   int iface,
942                                   int altno)
943 {
944         /* audiophile usb: skip altsets incompatible with device_setup */
945         if (chip->usb_id == USB_ID(0x0763, 0x2003))
946                 return audiophile_skip_setting_quirk(chip, iface, altno);
947         /* quattro usb: skip altsets incompatible with device_setup */
948         if (chip->usb_id == USB_ID(0x0763, 0x2001))
949                 return quattro_skip_setting_quirk(chip, iface, altno);
950         /* fasttrackpro usb: skip altsets incompatible with device_setup */
951         if (chip->usb_id == USB_ID(0x0763, 0x2012))
952                 return fasttrackpro_skip_setting_quirk(chip, iface, altno);
953 
954         return 0;
955 }
956 
957 int snd_usb_apply_boot_quirk(struct usb_device *dev,
958                              struct usb_interface *intf,
959                              const struct snd_usb_audio_quirk *quirk)
960 {
961         u32 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
962                         le16_to_cpu(dev->descriptor.idProduct));
963 
964         switch (id) {
965         case USB_ID(0x041e, 0x3000):
966                 /* SB Extigy needs special boot-up sequence */
967                 /* if more models come, this will go to the quirk list. */
968                 return snd_usb_extigy_boot_quirk(dev, intf);
969 
970         case USB_ID(0x041e, 0x3020):
971                 /* SB Audigy 2 NX needs its own boot-up magic, too */
972                 return snd_usb_audigy2nx_boot_quirk(dev);
973 
974         case USB_ID(0x10f5, 0x0200):
975                 /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
976                 return snd_usb_cm106_boot_quirk(dev);
977 
978         case USB_ID(0x0d8c, 0x0102):
979                 /* C-Media CM6206 / CM106-Like Sound Device */
980         case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
981                 return snd_usb_cm6206_boot_quirk(dev);
982 
983         case USB_ID(0x0dba, 0x3000):
984                 /* Digidesign Mbox 2 */
985                 return snd_usb_mbox2_boot_quirk(dev);
986 
987         case USB_ID(0x1235, 0x0010): /* Focusrite Novation Saffire 6 USB */
988         case USB_ID(0x1235, 0x0018): /* Focusrite Novation Twitch */
989                 return snd_usb_novation_boot_quirk(dev);
990 
991         case USB_ID(0x133e, 0x0815):
992                 /* Access Music VirusTI Desktop */
993                 return snd_usb_accessmusic_boot_quirk(dev);
994 
995         case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
996         case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
997         case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
998                 return snd_usb_nativeinstruments_boot_quirk(dev);
999         case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
1000                 return snd_usb_fasttrackpro_boot_quirk(dev);
1001         }
1002 
1003         return 0;
1004 }
1005 
1006 /*
1007  * check if the device uses big-endian samples
1008  */
1009 int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1010 {
1011         /* it depends on altsetting whether the device is big-endian or not */
1012         switch (chip->usb_id) {
1013         case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
1014                 if (fp->altsetting == 2 || fp->altsetting == 3 ||
1015                         fp->altsetting == 5 || fp->altsetting == 6)
1016                         return 1;
1017                 break;
1018         case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1019                 if (chip->setup == 0x00 ||
1020                         fp->altsetting == 1 || fp->altsetting == 2 ||
1021                         fp->altsetting == 3)
1022                         return 1;
1023                 break;
1024         case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
1025                 if (fp->altsetting == 2 || fp->altsetting == 3 ||
1026                         fp->altsetting == 5 || fp->altsetting == 6)
1027                         return 1;
1028                 break;
1029         }
1030         return 0;
1031 }
1032 
1033 /*
1034  * For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
1035  * not for interface.
1036  */
1037 
1038 enum {
1039         EMU_QUIRK_SR_44100HZ = 0,
1040         EMU_QUIRK_SR_48000HZ,
1041         EMU_QUIRK_SR_88200HZ,
1042         EMU_QUIRK_SR_96000HZ,
1043         EMU_QUIRK_SR_176400HZ,
1044         EMU_QUIRK_SR_192000HZ
1045 };
1046 
1047 static void set_format_emu_quirk(struct snd_usb_substream *subs,
1048                                  struct audioformat *fmt)
1049 {
1050         unsigned char emu_samplerate_id = 0;
1051 
1052         /* When capture is active
1053          * sample rate shouldn't be changed
1054          * by playback substream
1055          */
1056         if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1057                 if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
1058                         return;
1059         }
1060 
1061         switch (fmt->rate_min) {
1062         case 48000:
1063                 emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
1064                 break;
1065         case 88200:
1066                 emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
1067                 break;
1068         case 96000:
1069                 emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
1070                 break;
1071         case 176400:
1072                 emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
1073                 break;
1074         case 192000:
1075                 emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
1076                 break;
1077         default:
1078                 emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
1079                 break;
1080         }
1081         snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
1082         subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
1083 }
1084 
1085 void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
1086                               struct audioformat *fmt)
1087 {
1088         switch (subs->stream->chip->usb_id) {
1089         case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
1090         case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
1091         case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1092         case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
1093                 set_format_emu_quirk(subs, fmt);
1094                 break;
1095         }
1096 }
1097 
1098 void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
1099 {
1100         /*
1101          * "Playback Design" products send bogus feedback data at the start
1102          * of the stream. Ignore them.
1103          */
1104         if ((le16_to_cpu(ep->chip->dev->descriptor.idVendor) == 0x23ba) &&
1105             ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
1106                 ep->skip_packets = 4;
1107 
1108         /*
1109          * M-Audio Fast Track C400/C600 - when packets are not skipped, real
1110          * world latency varies by approx. +/- 50 frames (at 96KHz) each time
1111          * the stream is (re)started. When skipping packets 16 at endpoint
1112          * start up, the real world latency is stable within +/- 1 frame (also
1113          * across power cycles).
1114          */
1115         if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
1116              ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
1117             ep->type == SND_USB_ENDPOINT_TYPE_DATA)
1118                 ep->skip_packets = 16;
1119 }
1120 
1121 void snd_usb_set_interface_quirk(struct usb_device *dev)
1122 {
1123         /*
1124          * "Playback Design" products need a 50ms delay after setting the
1125          * USB interface.
1126          */
1127         switch (le16_to_cpu(dev->descriptor.idVendor)) {
1128         case 0x23ba: /* Playback Design */
1129         case 0x0644: /* TEAC Corp. */
1130                 mdelay(50);
1131                 break;
1132         }
1133 }
1134 
1135 void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
1136                            __u8 request, __u8 requesttype, __u16 value,
1137                            __u16 index, void *data, __u16 size)
1138 {
1139         /*
1140          * "Playback Design" products need a 20ms delay after each
1141          * class compliant request
1142          */
1143         if ((le16_to_cpu(dev->descriptor.idVendor) == 0x23ba) &&
1144             (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1145                 mdelay(20);
1146 
1147         /*
1148          * "TEAC Corp." products need a 20ms delay after each
1149          * class compliant request
1150          */
1151         if ((le16_to_cpu(dev->descriptor.idVendor) == 0x0644) &&
1152             (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
1153                 mdelay(20);
1154 
1155         /* Marantz/Denon devices with USB DAC functionality need a delay
1156          * after each class compliant request
1157          */
1158         if ((le16_to_cpu(dev->descriptor.idVendor) == 0x154e) &&
1159             (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS) {
1160 
1161                 switch (le16_to_cpu(dev->descriptor.idProduct)) {
1162                 case 0x3005: /* Marantz HD-DAC1 */
1163                 case 0x3006: /* Marantz SA-14S1 */
1164                         mdelay(20);
1165                         break;
1166                 }
1167         }
1168 }
1169 
1170 /*
1171  * snd_usb_interface_dsd_format_quirks() is called from format.c to
1172  * augment the PCM format bit-field for DSD types. The UAC standards
1173  * don't have a designated bit field to denote DSD-capable interfaces,
1174  * hence all hardware that is known to support this format has to be
1175  * listed here.
1176  */
1177 u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
1178                                         struct audioformat *fp,
1179                                         unsigned int sample_bytes)
1180 {
1181         /* Playback Designs */
1182         if (le16_to_cpu(chip->dev->descriptor.idVendor) == 0x23ba) {
1183                 switch (fp->altsetting) {
1184                 case 1:
1185                         fp->dsd_dop = true;
1186                         return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1187                 case 2:
1188                         fp->dsd_bitrev = true;
1189                         return SNDRV_PCM_FMTBIT_DSD_U8;
1190                 case 3:
1191                         fp->dsd_bitrev = true;
1192                         return SNDRV_PCM_FMTBIT_DSD_U16_LE;
1193                 }
1194         }
1195 
1196         return 0;
1197 }
1198 

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