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