1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 */
4
5 #include <linux/init.h>
6 #include <linux/slab.h>
7 #include <linux/usb.h>
8 #include <linux/usb/audio.h>
9 #include <linux/usb/audio-v2.h>
10 #include <linux/usb/audio-v3.h>
11
12 #include <sound/core.h>
13 #include <sound/pcm.h>
14
15 #include "usbaudio.h"
16 #include "card.h"
17 #include "quirks.h"
18 #include "helper.h"
19 #include "debug.h"
20 #include "clock.h"
21 #include "format.h"
22
23 /*
24 * parse the audio format type I descriptor
25 * and returns the corresponding pcm format
26 *
27 * @dev: usb device
28 * @fp: audioformat record
29 * @format: the format tag (wFormatTag)
30 * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
31 */
parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp, u64 format, void *_fmt)32 static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
33 struct audioformat *fp,
34 u64 format, void *_fmt)
35 {
36 int sample_width, sample_bytes;
37 u64 pcm_formats = 0;
38
39 switch (fp->protocol) {
40 case UAC_VERSION_1:
41 default: {
42 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
43 if (format >= 64) {
44 usb_audio_info(chip,
45 "%u:%d: invalid format type 0x%llx is detected, processed as PCM\n",
46 fp->iface, fp->altsetting, format);
47 format = UAC_FORMAT_TYPE_I_PCM;
48 }
49 sample_width = fmt->bBitResolution;
50 sample_bytes = fmt->bSubframeSize;
51 format = 1ULL << format;
52 break;
53 }
54
55 case UAC_VERSION_2: {
56 struct uac_format_type_i_ext_descriptor *fmt = _fmt;
57 sample_width = fmt->bBitResolution;
58 sample_bytes = fmt->bSubslotSize;
59
60 if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
61 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
62 /* flag potentially raw DSD capable altsettings */
63 fp->dsd_raw = true;
64 }
65
66 format <<= 1;
67 break;
68 }
69 case UAC_VERSION_3: {
70 struct uac3_as_header_descriptor *as = _fmt;
71
72 sample_width = as->bBitResolution;
73 sample_bytes = as->bSubslotSize;
74
75 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
76 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
77
78 format <<= 1;
79 break;
80 }
81 }
82
83 fp->fmt_bits = sample_width;
84
85 if ((pcm_formats == 0) &&
86 (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
87 /* some devices don't define this correctly... */
88 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
89 fp->iface, fp->altsetting);
90 format = 1 << UAC_FORMAT_TYPE_I_PCM;
91 }
92 if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
93 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
94 /* Edirol SD-90 */
95 (chip->usb_id == USB_ID(0x0582, 0x000c))) &&
96 /* Roland SC-D70 */
97 sample_width == 24 && sample_bytes == 2)
98 sample_bytes = 3;
99 else if (sample_width > sample_bytes * 8) {
100 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
101 fp->iface, fp->altsetting,
102 sample_width, sample_bytes);
103 }
104 /* check the format byte size */
105 switch (sample_bytes) {
106 case 1:
107 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
108 break;
109 case 2:
110 if (snd_usb_is_big_endian_format(chip, fp))
111 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
112 else
113 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
114 break;
115 case 3:
116 if (snd_usb_is_big_endian_format(chip, fp))
117 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
118 else
119 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
120 break;
121 case 4:
122 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
123 break;
124 default:
125 usb_audio_info(chip,
126 "%u:%d : unsupported sample bitwidth %d in %d bytes\n",
127 fp->iface, fp->altsetting,
128 sample_width, sample_bytes);
129 break;
130 }
131 }
132 if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
133 /* Dallas DS4201 workaround: it advertises U8 format, but really
134 supports S8. */
135 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
136 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
137 else
138 pcm_formats |= SNDRV_PCM_FMTBIT_U8;
139 }
140 if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
141 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
142 }
143 if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
144 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
145 }
146 if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
147 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
148 }
149 if (format & ~0x3f) {
150 usb_audio_info(chip,
151 "%u:%d : unsupported format bits %#llx\n",
152 fp->iface, fp->altsetting, format);
153 }
154
155 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
156
157 return pcm_formats;
158 }
159
set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)160 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
161 {
162 kfree(fp->rate_table);
163 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
164 if (!fp->rate_table)
165 return -ENOMEM;
166 fp->nr_rates = 1;
167 fp->rate_min = rate;
168 fp->rate_max = rate;
169 fp->rates = rate_bits;
170 fp->rate_table[0] = rate;
171 return 0;
172 }
173
174 /*
175 * parse the format descriptor and stores the possible sample rates
176 * on the audioformat table (audio class v1).
177 *
178 * @dev: usb device
179 * @fp: audioformat record
180 * @fmt: the format descriptor
181 * @offset: the start offset of descriptor pointing the rate type
182 * (7 for type I and II, 8 for type II)
183 */
parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp, unsigned char *fmt, int offset)184 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
185 unsigned char *fmt, int offset)
186 {
187 int nr_rates = fmt[offset];
188
189 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
190 usb_audio_err(chip,
191 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
192 fp->iface, fp->altsetting);
193 return -EINVAL;
194 }
195
196 if (nr_rates) {
197 /*
198 * build the rate table and bitmap flags
199 */
200 int r, idx;
201
202 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
203 GFP_KERNEL);
204 if (fp->rate_table == NULL)
205 return -ENOMEM;
206
207 fp->nr_rates = 0;
208 fp->rate_min = fp->rate_max = 0;
209 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
210 unsigned int rate = combine_triple(&fmt[idx]);
211 if (!rate)
212 continue;
213 /* C-Media CM6501 mislabels its 96 kHz altsetting */
214 /* Terratec Aureon 7.1 USB C-Media 6206, too */
215 /* Ozone Z90 USB C-Media, too */
216 if (rate == 48000 && nr_rates == 1 &&
217 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
218 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
219 chip->usb_id == USB_ID(0x0d8c, 0x0078) ||
220 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
221 fp->altsetting == 5 && fp->maxpacksize == 392)
222 rate = 96000;
223 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
224 if (rate == 16000 &&
225 (chip->usb_id == USB_ID(0x041e, 0x4064) ||
226 chip->usb_id == USB_ID(0x041e, 0x4068)))
227 rate = 8000;
228
229 fp->rate_table[fp->nr_rates] = rate;
230 if (!fp->rate_min || rate < fp->rate_min)
231 fp->rate_min = rate;
232 if (!fp->rate_max || rate > fp->rate_max)
233 fp->rate_max = rate;
234 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
235 fp->nr_rates++;
236 }
237 if (!fp->nr_rates) {
238 hwc_debug("All rates were zero. Skipping format!\n");
239 return -EINVAL;
240 }
241 } else {
242 /* continuous rates */
243 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
244 fp->rate_min = combine_triple(&fmt[offset + 1]);
245 fp->rate_max = combine_triple(&fmt[offset + 4]);
246 }
247
248 /* Jabra Evolve 65 headset */
249 if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) {
250 /* only 48kHz for playback while keeping 16kHz for capture */
251 if (fp->nr_rates != 1)
252 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
253 }
254
255 return 0;
256 }
257
258
259 /*
260 * Presonus Studio 1810c supports a limited set of sampling
261 * rates per altsetting but reports the full set each time.
262 * If we don't filter out the unsupported rates and attempt
263 * to configure the card, it will hang refusing to do any
264 * further audio I/O until a hard reset is performed.
265 *
266 * The list of supported rates per altsetting (set of available
267 * I/O channels) is described in the owner's manual, section 2.2.
268 */
s1810c_valid_sample_rate(struct audioformat *fp, unsigned int rate)269 static bool s1810c_valid_sample_rate(struct audioformat *fp,
270 unsigned int rate)
271 {
272 switch (fp->altsetting) {
273 case 1:
274 /* All ADAT ports available */
275 return rate <= 48000;
276 case 2:
277 /* Half of ADAT ports available */
278 return (rate == 88200 || rate == 96000);
279 case 3:
280 /* Analog I/O only (no S/PDIF nor ADAT) */
281 return rate >= 176400;
282 default:
283 return false;
284 }
285 return false;
286 }
287
288 /*
289 * Many Focusrite devices supports a limited set of sampling rates per
290 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
291 * descriptor which has a non-standard bLength = 10.
292 */
focusrite_valid_sample_rate(struct snd_usb_audio *chip, struct audioformat *fp, unsigned int rate)293 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
294 struct audioformat *fp,
295 unsigned int rate)
296 {
297 struct usb_interface *iface;
298 struct usb_host_interface *alts;
299 unsigned char *fmt;
300 unsigned int max_rate;
301
302 iface = usb_ifnum_to_if(chip->dev, fp->iface);
303 if (!iface)
304 return true;
305
306 alts = &iface->altsetting[fp->altset_idx];
307 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
308 NULL, UAC_FORMAT_TYPE);
309 if (!fmt)
310 return true;
311
312 if (fmt[0] == 10) { /* bLength */
313 max_rate = combine_quad(&fmt[6]);
314
315 /* Validate max rate */
316 if (max_rate != 48000 &&
317 max_rate != 96000 &&
318 max_rate != 192000 &&
319 max_rate != 384000) {
320
321 usb_audio_info(chip,
322 "%u:%d : unexpected max rate: %u\n",
323 fp->iface, fp->altsetting, max_rate);
324
325 return true;
326 }
327
328 return rate <= max_rate;
329 }
330
331 return true;
332 }
333
334 /*
335 * Helper function to walk the array of sample rate triplets reported by
336 * the device. The problem is that we need to parse whole array first to
337 * get to know how many sample rates we have to expect.
338 * Then fp->rate_table can be allocated and filled.
339 */
parse_uac2_sample_rate_range(struct snd_usb_audio *chip, struct audioformat *fp, int nr_triplets, const unsigned char *data)340 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
341 struct audioformat *fp, int nr_triplets,
342 const unsigned char *data)
343 {
344 int i, nr_rates = 0;
345
346 fp->rates = fp->rate_min = fp->rate_max = 0;
347
348 for (i = 0; i < nr_triplets; i++) {
349 int min = combine_quad(&data[2 + 12 * i]);
350 int max = combine_quad(&data[6 + 12 * i]);
351 int res = combine_quad(&data[10 + 12 * i]);
352 unsigned int rate;
353
354 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
355 continue;
356
357 /*
358 * for ranges with res == 1, we announce a continuous sample
359 * rate range, and this function should return 0 for no further
360 * parsing.
361 */
362 if (res == 1) {
363 fp->rate_min = min;
364 fp->rate_max = max;
365 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
366 return 0;
367 }
368
369 for (rate = min; rate <= max; rate += res) {
370
371 /* Filter out invalid rates on Presonus Studio 1810c */
372 if (chip->usb_id == USB_ID(0x194f, 0x010c) &&
373 !s1810c_valid_sample_rate(fp, rate))
374 goto skip_rate;
375
376 /* Filter out invalid rates on Focusrite devices */
377 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
378 !focusrite_valid_sample_rate(chip, fp, rate))
379 goto skip_rate;
380
381 if (fp->rate_table)
382 fp->rate_table[nr_rates] = rate;
383 if (!fp->rate_min || rate < fp->rate_min)
384 fp->rate_min = rate;
385 if (!fp->rate_max || rate > fp->rate_max)
386 fp->rate_max = rate;
387 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
388
389 nr_rates++;
390 if (nr_rates >= MAX_NR_RATES) {
391 usb_audio_err(chip, "invalid uac2 rates\n");
392 break;
393 }
394
395 skip_rate:
396 /* avoid endless loop */
397 if (res == 0)
398 break;
399 }
400 }
401
402 return nr_rates;
403 }
404
405 /* Line6 Helix series and the Rode Rodecaster Pro don't support the
406 * UAC2_CS_RANGE usb function call. Return a static table of known
407 * clock rates.
408 */
line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip, struct audioformat *fp)409 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
410 struct audioformat *fp)
411 {
412 switch (chip->usb_id) {
413 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
414 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
415 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
416 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
417 case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */
418 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
419 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
420 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
421 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
422 case USB_ID(0x0e41, 0x424b): /* Line6 Pod Go */
423 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
424 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
425 }
426
427 return -ENODEV;
428 }
429
430 /*
431 * parse the format descriptor and stores the possible sample rates
432 * on the audioformat table (audio class v2 and v3).
433 */
parse_audio_format_rates_v2v3(struct snd_usb_audio *chip, struct audioformat *fp)434 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
435 struct audioformat *fp)
436 {
437 struct usb_device *dev = chip->dev;
438 unsigned char tmp[2], *data;
439 int nr_triplets, data_size, ret = 0, ret_l6;
440 int clock = snd_usb_clock_find_source(chip, fp, false);
441
442 if (clock < 0) {
443 dev_err(&dev->dev,
444 "%s(): unable to find clock source (clock %d)\n",
445 __func__, clock);
446 goto err;
447 }
448
449 /* get the number of sample rates first by only fetching 2 bytes */
450 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
451 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
452 UAC2_CS_CONTROL_SAM_FREQ << 8,
453 snd_usb_ctrl_intf(chip) | (clock << 8),
454 tmp, sizeof(tmp));
455
456 if (ret < 0) {
457 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
458 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
459 if (ret_l6 == -ENODEV) {
460 /* no line6 device found continue showing the error */
461 dev_err(&dev->dev,
462 "%s(): unable to retrieve number of sample rates (clock %d)\n",
463 __func__, clock);
464 goto err;
465 }
466 if (ret_l6 == 0) {
467 dev_info(&dev->dev,
468 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
469 __func__, clock);
470 return 0;
471 }
472 ret = ret_l6;
473 goto err;
474 }
475
476 nr_triplets = (tmp[1] << 8) | tmp[0];
477 data_size = 2 + 12 * nr_triplets;
478 data = kzalloc(data_size, GFP_KERNEL);
479 if (!data) {
480 ret = -ENOMEM;
481 goto err;
482 }
483
484 /* now get the full information */
485 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
486 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
487 UAC2_CS_CONTROL_SAM_FREQ << 8,
488 snd_usb_ctrl_intf(chip) | (clock << 8),
489 data, data_size);
490
491 if (ret < 0) {
492 dev_err(&dev->dev,
493 "%s(): unable to retrieve sample rate range (clock %d)\n",
494 __func__, clock);
495 ret = -EINVAL;
496 goto err_free;
497 }
498
499 /* Call the triplet parser, and make sure fp->rate_table is NULL.
500 * We just use the return value to know how many sample rates we
501 * will have to deal with. */
502 kfree(fp->rate_table);
503 fp->rate_table = NULL;
504 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
505
506 if (fp->nr_rates == 0) {
507 /* SNDRV_PCM_RATE_CONTINUOUS */
508 ret = 0;
509 goto err_free;
510 }
511
512 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
513 if (!fp->rate_table) {
514 ret = -ENOMEM;
515 goto err_free;
516 }
517
518 /* Call the triplet parser again, but this time, fp->rate_table is
519 * allocated, so the rates will be stored */
520 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
521
522 err_free:
523 kfree(data);
524 err:
525 return ret;
526 }
527
528 /*
529 * parse the format type I and III descriptors
530 */
parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp, u64 format, void *_fmt)531 static int parse_audio_format_i(struct snd_usb_audio *chip,
532 struct audioformat *fp, u64 format,
533 void *_fmt)
534 {
535 snd_pcm_format_t pcm_format;
536 unsigned int fmt_type;
537 int ret;
538
539 switch (fp->protocol) {
540 default:
541 case UAC_VERSION_1:
542 case UAC_VERSION_2: {
543 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
544
545 fmt_type = fmt->bFormatType;
546 break;
547 }
548 case UAC_VERSION_3: {
549 /* fp->fmt_type is already set in this case */
550 fmt_type = fp->fmt_type;
551 break;
552 }
553 }
554
555 if (fmt_type == UAC_FORMAT_TYPE_III) {
556 /* FIXME: the format type is really IECxxx
557 * but we give normal PCM format to get the existing
558 * apps working...
559 */
560 switch (chip->usb_id) {
561
562 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
563 if (chip->setup == 0x00 &&
564 fp->altsetting == 6)
565 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
566 else
567 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
568 break;
569 default:
570 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
571 }
572 fp->formats = pcm_format_to_bits(pcm_format);
573 } else {
574 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
575 if (!fp->formats)
576 return -EINVAL;
577 }
578
579 /* gather possible sample rates */
580 /* audio class v1 reports possible sample rates as part of the
581 * proprietary class specific descriptor.
582 * audio class v2 uses class specific EP0 range requests for that.
583 */
584 switch (fp->protocol) {
585 default:
586 case UAC_VERSION_1: {
587 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
588
589 fp->channels = fmt->bNrChannels;
590 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
591 break;
592 }
593 case UAC_VERSION_2:
594 case UAC_VERSION_3: {
595 /* fp->channels is already set in this case */
596 ret = parse_audio_format_rates_v2v3(chip, fp);
597 break;
598 }
599 }
600
601 if (fp->channels < 1) {
602 usb_audio_err(chip,
603 "%u:%d : invalid channels %d\n",
604 fp->iface, fp->altsetting, fp->channels);
605 return -EINVAL;
606 }
607
608 return ret;
609 }
610
611 /*
612 * parse the format type II descriptor
613 */
parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp, u64 format, void *_fmt)614 static int parse_audio_format_ii(struct snd_usb_audio *chip,
615 struct audioformat *fp,
616 u64 format, void *_fmt)
617 {
618 int brate, framesize, ret;
619
620 switch (format) {
621 case UAC_FORMAT_TYPE_II_AC3:
622 /* FIXME: there is no AC3 format defined yet */
623 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
624 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
625 break;
626 case UAC_FORMAT_TYPE_II_MPEG:
627 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
628 break;
629 default:
630 usb_audio_info(chip,
631 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
632 fp->iface, fp->altsetting, format);
633 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
634 break;
635 }
636
637 fp->channels = 1;
638
639 switch (fp->protocol) {
640 default:
641 case UAC_VERSION_1: {
642 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
643 brate = le16_to_cpu(fmt->wMaxBitRate);
644 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
645 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
646 fp->frame_size = framesize;
647 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
648 break;
649 }
650 case UAC_VERSION_2: {
651 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
652 brate = le16_to_cpu(fmt->wMaxBitRate);
653 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
654 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
655 fp->frame_size = framesize;
656 ret = parse_audio_format_rates_v2v3(chip, fp);
657 break;
658 }
659 }
660
661 return ret;
662 }
663
snd_usb_parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp, u64 format, struct uac_format_type_i_continuous_descriptor *fmt, int stream)664 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
665 struct audioformat *fp, u64 format,
666 struct uac_format_type_i_continuous_descriptor *fmt,
667 int stream)
668 {
669 int err;
670
671 switch (fmt->bFormatType) {
672 case UAC_FORMAT_TYPE_I:
673 case UAC_FORMAT_TYPE_III:
674 err = parse_audio_format_i(chip, fp, format, fmt);
675 break;
676 case UAC_FORMAT_TYPE_II:
677 err = parse_audio_format_ii(chip, fp, format, fmt);
678 break;
679 default:
680 usb_audio_info(chip,
681 "%u:%d : format type %d is not supported yet\n",
682 fp->iface, fp->altsetting,
683 fmt->bFormatType);
684 return -ENOTSUPP;
685 }
686 fp->fmt_type = fmt->bFormatType;
687 if (err < 0)
688 return err;
689 #if 1
690 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
691 /* extigy apparently supports sample rates other than 48k
692 * but not in ordinary way. so we enable only 48k atm.
693 */
694 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
695 chip->usb_id == USB_ID(0x041e, 0x3020) ||
696 chip->usb_id == USB_ID(0x041e, 0x3061)) {
697 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
698 fp->rates != SNDRV_PCM_RATE_48000 &&
699 fp->rates != SNDRV_PCM_RATE_96000)
700 return -ENOTSUPP;
701 }
702 #endif
703 return 0;
704 }
705
snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip, struct audioformat *fp, struct uac3_as_header_descriptor *as, int stream)706 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
707 struct audioformat *fp,
708 struct uac3_as_header_descriptor *as,
709 int stream)
710 {
711 u64 format = le64_to_cpu(as->bmFormats);
712 int err;
713
714 /*
715 * Type I format bits are D0..D6
716 * This test works because type IV is not supported
717 */
718 if (format & 0x7f)
719 fp->fmt_type = UAC_FORMAT_TYPE_I;
720 else
721 fp->fmt_type = UAC_FORMAT_TYPE_III;
722
723 err = parse_audio_format_i(chip, fp, format, as);
724 if (err < 0)
725 return err;
726
727 return 0;
728 }
729