blob: 9a9da09586a5581b8fe26eec00d3b5183e3a8469 [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 Rothwell36db0452010-03-29 16:02:50 +110018#include <linux/slab.h>
Daniel Macke5779992010-03-04 19:46:13 +010019#include <linux/usb.h>
20#include <linux/usb/audio.h>
21
22#include <sound/core.h>
23#include <sound/info.h>
24#include <sound/pcm.h>
25
26#include "usbaudio.h"
27#include "card.h"
Daniel Mackf0b5e632010-03-11 21:13:23 +010028#include "mixer.h"
Daniel Mack7b1eda22010-03-11 21:13:22 +010029#include "mixer_quirks.h"
Daniel Macke5779992010-03-04 19:46:13 +010030#include "midi.h"
31#include "quirks.h"
32#include "helper.h"
33#include "endpoint.h"
34#include "pcm.h"
Daniel Mack3d8d4dc2010-06-16 17:57:31 +020035#include "clock.h"
Daniel Macke5779992010-03-04 19:46:13 +010036
37/*
38 * handle the quirks for the contained interfaces
39 */
40static int create_composite_quirk(struct snd_usb_audio *chip,
41 struct usb_interface *iface,
42 struct usb_driver *driver,
43 const struct snd_usb_audio_quirk *quirk)
44{
45 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
46 int err;
47
48 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
49 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
50 if (!iface)
51 continue;
52 if (quirk->ifnum != probed_ifnum &&
53 usb_interface_claimed(iface))
54 continue;
55 err = snd_usb_create_quirk(chip, iface, driver, quirk);
56 if (err < 0)
57 return err;
58 if (quirk->ifnum != probed_ifnum)
59 usb_driver_claim_interface(driver, iface, (void *)-1L);
60 }
61 return 0;
62}
63
64static int ignore_interface_quirk(struct snd_usb_audio *chip,
65 struct usb_interface *iface,
66 struct usb_driver *driver,
67 const struct snd_usb_audio_quirk *quirk)
68{
69 return 0;
70}
71
72
73/*
74 * Allow alignment on audio sub-slot (channel samples) rather than
75 * on audio slots (audio frames)
76 */
77static int create_align_transfer_quirk(struct snd_usb_audio *chip,
78 struct usb_interface *iface,
79 struct usb_driver *driver,
80 const struct snd_usb_audio_quirk *quirk)
81{
82 chip->txfr_quirk = 1;
83 return 1; /* Continue with creating streams and mixer */
84}
85
86static int create_any_midi_quirk(struct snd_usb_audio *chip,
87 struct usb_interface *intf,
88 struct usb_driver *driver,
89 const struct snd_usb_audio_quirk *quirk)
90{
91 return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
92}
93
94/*
95 * create a stream for an interface with proper descriptors
96 */
97static int create_standard_audio_quirk(struct snd_usb_audio *chip,
98 struct usb_interface *iface,
99 struct usb_driver *driver,
100 const struct snd_usb_audio_quirk *quirk)
101{
102 struct usb_host_interface *alts;
103 struct usb_interface_descriptor *altsd;
104 int err;
105
106 alts = &iface->altsetting[0];
107 altsd = get_iface_desc(alts);
108 err = snd_usb_parse_audio_endpoints(chip, altsd->bInterfaceNumber);
109 if (err < 0) {
110 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
111 altsd->bInterfaceNumber, err);
112 return err;
113 }
114 /* reset the current interface */
115 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
116 return 0;
117}
118
119/*
120 * create a stream for an endpoint/altsetting without proper descriptors
121 */
122static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
123 struct usb_interface *iface,
124 struct usb_driver *driver,
125 const struct snd_usb_audio_quirk *quirk)
126{
127 struct audioformat *fp;
128 struct usb_host_interface *alts;
129 int stream, err;
130 unsigned *rate_table = NULL;
131
132 fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
133 if (! fp) {
134 snd_printk(KERN_ERR "cannot memdup\n");
135 return -ENOMEM;
136 }
137 if (fp->nr_rates > 0) {
138 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
139 if (!rate_table) {
140 kfree(fp);
141 return -ENOMEM;
142 }
143 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
144 fp->rate_table = rate_table;
145 }
146
147 stream = (fp->endpoint & USB_DIR_IN)
148 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
149 err = snd_usb_add_audio_endpoint(chip, stream, fp);
150 if (err < 0) {
151 kfree(fp);
152 kfree(rate_table);
153 return err;
154 }
155 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
156 fp->altset_idx >= iface->num_altsetting) {
157 kfree(fp);
158 kfree(rate_table);
159 return -EINVAL;
160 }
161 alts = &iface->altsetting[fp->altset_idx];
162 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
163 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
164 usb_set_interface(chip->dev, fp->iface, 0);
Daniel Mack767d75a2010-03-04 19:46:17 +0100165 snd_usb_init_pitch(chip, fp->iface, alts, fp);
166 snd_usb_init_sample_rate(chip, fp->iface, alts, fp, fp->rate_max);
Daniel Macke5779992010-03-04 19:46:13 +0100167 return 0;
168}
169
170/*
171 * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
172 * The only way to detect the sample rate is by looking at wMaxPacketSize.
173 */
174static int create_uaxx_quirk(struct snd_usb_audio *chip,
175 struct usb_interface *iface,
176 struct usb_driver *driver,
177 const struct snd_usb_audio_quirk *quirk)
178{
179 static const struct audioformat ua_format = {
Clemens Ladisch015eb0b2010-03-04 19:46:15 +0100180 .formats = SNDRV_PCM_FMTBIT_S24_3LE,
Daniel Macke5779992010-03-04 19:46:13 +0100181 .channels = 2,
182 .fmt_type = UAC_FORMAT_TYPE_I,
183 .altsetting = 1,
184 .altset_idx = 1,
185 .rates = SNDRV_PCM_RATE_CONTINUOUS,
186 };
187 struct usb_host_interface *alts;
188 struct usb_interface_descriptor *altsd;
189 struct audioformat *fp;
190 int stream, err;
191
192 /* both PCM and MIDI interfaces have 2 or more altsettings */
193 if (iface->num_altsetting < 2)
194 return -ENXIO;
195 alts = &iface->altsetting[1];
196 altsd = get_iface_desc(alts);
197
198 if (altsd->bNumEndpoints == 2) {
199 static const struct snd_usb_midi_endpoint_info ua700_ep = {
200 .out_cables = 0x0003,
201 .in_cables = 0x0003
202 };
203 static const struct snd_usb_audio_quirk ua700_quirk = {
204 .type = QUIRK_MIDI_FIXED_ENDPOINT,
205 .data = &ua700_ep
206 };
207 static const struct snd_usb_midi_endpoint_info uaxx_ep = {
208 .out_cables = 0x0001,
209 .in_cables = 0x0001
210 };
211 static const struct snd_usb_audio_quirk uaxx_quirk = {
212 .type = QUIRK_MIDI_FIXED_ENDPOINT,
213 .data = &uaxx_ep
214 };
215 const struct snd_usb_audio_quirk *quirk =
216 chip->usb_id == USB_ID(0x0582, 0x002b)
217 ? &ua700_quirk : &uaxx_quirk;
218 return snd_usbmidi_create(chip->card, iface,
219 &chip->midi_list, quirk);
220 }
221
222 if (altsd->bNumEndpoints != 1)
223 return -ENXIO;
224
225 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
226 if (!fp)
227 return -ENOMEM;
228 memcpy(fp, &ua_format, sizeof(*fp));
229
230 fp->iface = altsd->bInterfaceNumber;
231 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
232 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
233 fp->datainterval = 0;
234 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
235
236 switch (fp->maxpacksize) {
237 case 0x120:
238 fp->rate_max = fp->rate_min = 44100;
239 break;
240 case 0x138:
241 case 0x140:
242 fp->rate_max = fp->rate_min = 48000;
243 break;
244 case 0x258:
245 case 0x260:
246 fp->rate_max = fp->rate_min = 96000;
247 break;
248 default:
249 snd_printk(KERN_ERR "unknown sample rate\n");
250 kfree(fp);
251 return -ENXIO;
252 }
253
254 stream = (fp->endpoint & USB_DIR_IN)
255 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
256 err = snd_usb_add_audio_endpoint(chip, stream, fp);
257 if (err < 0) {
258 kfree(fp);
259 return err;
260 }
261 usb_set_interface(chip->dev, fp->iface, 0);
262 return 0;
263}
264
265/*
266 * audio-interface quirks
267 *
268 * returns zero if no standard audio/MIDI parsing is needed.
269 * returns a postive value if standard audio/midi interfaces are parsed
270 * after this.
271 * returns a negative value at error.
272 */
273int snd_usb_create_quirk(struct snd_usb_audio *chip,
274 struct usb_interface *iface,
275 struct usb_driver *driver,
276 const struct snd_usb_audio_quirk *quirk)
277{
278 typedef int (*quirk_func_t)(struct snd_usb_audio *,
279 struct usb_interface *,
280 struct usb_driver *,
281 const struct snd_usb_audio_quirk *);
282 static const quirk_func_t quirk_funcs[] = {
283 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
284 [QUIRK_COMPOSITE] = create_composite_quirk,
285 [QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
286 [QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
287 [QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
288 [QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
289 [QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
290 [QUIRK_MIDI_FASTLANE] = create_any_midi_quirk,
291 [QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
292 [QUIRK_MIDI_CME] = create_any_midi_quirk,
Krzysztof Foltman4434ade2010-05-20 20:31:10 +0100293 [QUIRK_MIDI_AKAI] = create_any_midi_quirk,
Daniel Macke5779992010-03-04 19:46:13 +0100294 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
295 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
296 [QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
297 [QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk
298 };
299
300 if (quirk->type < QUIRK_TYPE_COUNT) {
301 return quirk_funcs[quirk->type](chip, iface, driver, quirk);
302 } else {
303 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
304 return -ENXIO;
305 }
306}
307
308/*
309 * boot quirks
310 */
311
312#define EXTIGY_FIRMWARE_SIZE_OLD 794
313#define EXTIGY_FIRMWARE_SIZE_NEW 483
314
315static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
316{
317 struct usb_host_config *config = dev->actconfig;
318 int err;
319
320 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
321 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
322 snd_printdd("sending Extigy boot sequence...\n");
323 /* Send message to force it to reconnect with full interface. */
324 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
325 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
326 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
327 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
328 &dev->descriptor, sizeof(dev->descriptor));
329 config = dev->actconfig;
330 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
331 err = usb_reset_configuration(dev);
332 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
333 snd_printdd("extigy_boot: new boot length = %d\n",
334 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
335 return -ENODEV; /* quit this anyway */
336 }
337 return 0;
338}
339
340static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
341{
342 u8 buf = 1;
343
344 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
345 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
346 0, 0, &buf, 1, 1000);
347 if (buf == 0) {
348 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
349 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
350 1, 2000, NULL, 0, 1000);
351 return -ENODEV;
352 }
353 return 0;
354}
355
356/*
357 * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
358 * documented in the device's data sheet.
359 */
360static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
361{
362 u8 buf[4];
363 buf[0] = 0x20;
364 buf[1] = value & 0xff;
365 buf[2] = (value >> 8) & 0xff;
366 buf[3] = reg;
367 return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
368 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
369 0, 0, &buf, 4, 1000);
370}
371
372static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
373{
374 /*
375 * Enable line-out driver mode, set headphone source to front
376 * channels, enable stereo mic.
377 */
378 return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
379}
380
381/*
382 * C-Media CM6206 is based on CM106 with two additional
383 * registers that are not documented in the data sheet.
384 * Values here are chosen based on sniffing USB traffic
385 * under Windows.
386 */
387static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
388{
389 int err, reg;
390 int val[] = {0x200c, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
391
392 for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
393 err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
394 if (err < 0)
395 return err;
396 }
397
398 return err;
399}
400
401/*
402 * This call will put the synth in "USB send" mode, i.e it will send MIDI
403 * messages through USB (this is disabled at startup). The synth will
404 * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
405 * sign on its LCD. Values here are chosen based on sniffing USB traffic
406 * under Windows.
407 */
408static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
409{
410 int err, actual_length;
411
412 /* "midi send" enable */
413 static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
414
415 void *buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
416 if (!buf)
417 return -ENOMEM;
418 err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
419 ARRAY_SIZE(seq), &actual_length, 1000);
420 kfree(buf);
421 if (err < 0)
422 return err;
423
424 return 0;
425}
426
427/*
428 * Setup quirks
429 */
430#define AUDIOPHILE_SET 0x01 /* if set, parse device_setup */
431#define AUDIOPHILE_SET_DTS 0x02 /* if set, enable DTS Digital Output */
432#define AUDIOPHILE_SET_96K 0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
433#define AUDIOPHILE_SET_24B 0x08 /* 24bits sample if set, 16bits otherwise */
434#define AUDIOPHILE_SET_DI 0x10 /* if set, enable Digital Input */
435#define AUDIOPHILE_SET_MASK 0x1F /* bit mask for setup value */
436#define AUDIOPHILE_SET_24B_48K_DI 0x19 /* value for 24bits+48KHz+Digital Input */
437#define AUDIOPHILE_SET_24B_48K_NOTDI 0x09 /* value for 24bits+48KHz+No Digital Input */
438#define AUDIOPHILE_SET_16B_48K_DI 0x11 /* value for 16bits+48KHz+Digital Input */
439#define AUDIOPHILE_SET_16B_48K_NOTDI 0x01 /* value for 16bits+48KHz+No Digital Input */
440
441static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
442 int iface,
443 int altno)
444{
445 /* Reset ALL ifaces to 0 altsetting.
446 * Call it for every possible altsetting of every interface.
447 */
448 usb_set_interface(chip->dev, iface, 0);
449
450 if (chip->setup & AUDIOPHILE_SET) {
451 if ((chip->setup & AUDIOPHILE_SET_DTS)
452 && altno != 6)
453 return 1; /* skip this altsetting */
454 if ((chip->setup & AUDIOPHILE_SET_96K)
455 && altno != 1)
456 return 1; /* skip this altsetting */
457 if ((chip->setup & AUDIOPHILE_SET_MASK) ==
458 AUDIOPHILE_SET_24B_48K_DI && altno != 2)
459 return 1; /* skip this altsetting */
460 if ((chip->setup & AUDIOPHILE_SET_MASK) ==
461 AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
462 return 1; /* skip this altsetting */
463 if ((chip->setup & AUDIOPHILE_SET_MASK) ==
464 AUDIOPHILE_SET_16B_48K_DI && altno != 4)
465 return 1; /* skip this altsetting */
466 if ((chip->setup & AUDIOPHILE_SET_MASK) ==
467 AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
468 return 1; /* skip this altsetting */
469 }
470
471 return 0; /* keep this altsetting */
472}
473
474int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
475 int iface,
476 int altno)
477{
478 /* audiophile usb: skip altsets incompatible with device_setup */
479 if (chip->usb_id == USB_ID(0x0763, 0x2003))
480 return audiophile_skip_setting_quirk(chip, iface, altno);
481
482 return 0;
483}
484
485int snd_usb_apply_boot_quirk(struct usb_device *dev,
486 struct usb_interface *intf,
487 const struct snd_usb_audio_quirk *quirk)
488{
489 u32 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
490 le16_to_cpu(dev->descriptor.idProduct));
491
492 /* SB Extigy needs special boot-up sequence */
493 /* if more models come, this will go to the quirk list. */
494 if (id == USB_ID(0x041e, 0x3000))
495 return snd_usb_extigy_boot_quirk(dev, intf);
496
497 /* SB Audigy 2 NX needs its own boot-up magic, too */
498 if (id == USB_ID(0x041e, 0x3020))
499 return snd_usb_audigy2nx_boot_quirk(dev);
500
501 /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
502 if (id == USB_ID(0x10f5, 0x0200))
503 return snd_usb_cm106_boot_quirk(dev);
504
505 /* C-Media CM6206 / CM106-Like Sound Device */
506 if (id == USB_ID(0x0d8c, 0x0102))
507 return snd_usb_cm6206_boot_quirk(dev);
508
509 /* Access Music VirusTI Desktop */
510 if (id == USB_ID(0x133e, 0x0815))
511 return snd_usb_accessmusic_boot_quirk(dev);
512
513 return 0;
514}
515
516/*
517 * check if the device uses big-endian samples
518 */
519int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
520{
521 switch (chip->usb_id) {
522 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
523 if (fp->endpoint & USB_DIR_IN)
524 return 1;
525 break;
526 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
527 if (chip->setup == 0x00 ||
528 fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
529 return 1;
530 }
531 return 0;
532}
533
534/*
535 * For E-Mu 0404USB/0202USB/TrackerPre sample rate should be set for device,
536 * not for interface.
537 */
538
539enum {
540 EMU_QUIRK_SR_44100HZ = 0,
541 EMU_QUIRK_SR_48000HZ,
542 EMU_QUIRK_SR_88200HZ,
543 EMU_QUIRK_SR_96000HZ,
544 EMU_QUIRK_SR_176400HZ,
545 EMU_QUIRK_SR_192000HZ
546};
547
548static void set_format_emu_quirk(struct snd_usb_substream *subs,
549 struct audioformat *fmt)
550{
551 unsigned char emu_samplerate_id = 0;
552
553 /* When capture is active
554 * sample rate shouldn't be changed
555 * by playback substream
556 */
557 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
558 if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
559 return;
560 }
561
562 switch (fmt->rate_min) {
563 case 48000:
564 emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
565 break;
566 case 88200:
567 emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
568 break;
569 case 96000:
570 emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
571 break;
572 case 176400:
573 emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
574 break;
575 case 192000:
576 emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
577 break;
578 default:
579 emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
580 break;
581 }
582 snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
583}
584
585void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
586 struct audioformat *fmt)
587{
588 switch (subs->stream->chip->usb_id) {
589 case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
590 case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
591 case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
592 set_format_emu_quirk(subs, fmt);
593 break;
594 }
595}
596