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 sample_width = fmt->bBitResolution;
44 sample_bytes = fmt->bSubframeSize;
45 format = 1ULL << format;
46 break;
47 }
48
49 case UAC_VERSION_2: {
50 struct uac_format_type_i_ext_descriptor *fmt = _fmt;
51 sample_width = fmt->bBitResolution;
52 sample_bytes = fmt->bSubslotSize;
53
54 if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
55 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
56 /* flag potentially raw DSD capable altsettings */
57 fp->dsd_raw = true;
58 }
59
60 format <<= 1;
61 break;
62 }
63 case UAC_VERSION_3: {
64 struct uac3_as_header_descriptor *as = _fmt;
65
66 sample_width = as->bBitResolution;
67 sample_bytes = as->bSubslotSize;
68
69 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
70 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
71
72 format <<= 1;
73 break;
74 }
75 }
76
77 fp->fmt_bits = sample_width;
78
79 if ((pcm_formats == 0) &&
80 (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
81 /* some devices don't define this correctly... */
82 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
83 fp->iface, fp->altsetting);
84 format = 1 << UAC_FORMAT_TYPE_I_PCM;
85 }
86 if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
87 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
88 /* Edirol SD-90 */
89 (chip->usb_id == USB_ID(0x0582, 0x000c))) &&
90 /* Roland SC-D70 */
91 sample_width == 24 && sample_bytes == 2)
92 sample_bytes = 3;
93 else if (sample_width > sample_bytes * 8) {
94 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
95 fp->iface, fp->altsetting,
96 sample_width, sample_bytes);
97 }
98 /* check the format byte size */
99 switch (sample_bytes) {
100 case 1:
101 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
102 break;
103 case 2:
104 if (snd_usb_is_big_endian_format(chip, fp))
105 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
106 else
107 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
108 break;
109 case 3:
110 if (snd_usb_is_big_endian_format(chip, fp))
111 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
112 else
113 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
114 break;
115 case 4:
116 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
117 break;
118 default:
119 usb_audio_info(chip,
120 "%u:%d : unsupported sample bitwidth %d in %d bytes\n",
121 fp->iface, fp->altsetting,
122 sample_width, sample_bytes);
123 break;
124 }
125 }
126 if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
127 /* Dallas DS4201 workaround: it advertises U8 format, but really
128 supports S8. */
129 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
130 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
131 else
132 pcm_formats |= SNDRV_PCM_FMTBIT_U8;
133 }
134 if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
135 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
136 }
137 if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
138 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
139 }
140 if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
141 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
142 }
143 if (format & ~0x3f) {
144 usb_audio_info(chip,
145 "%u:%d : unsupported format bits %#llx\n",
146 fp->iface, fp->altsetting, format);
147 }
148
149 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
150
151 return pcm_formats;
152 }
153
set_fixed_rate(struct audioformat * fp,int rate,int rate_bits)154 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
155 {
156 kfree(fp->rate_table);
157 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
158 if (!fp->rate_table)
159 return -ENOMEM;
160 fp->nr_rates = 1;
161 fp->rate_min = rate;
162 fp->rate_max = rate;
163 fp->rates = rate_bits;
164 fp->rate_table[0] = rate;
165 return 0;
166 }
167
168 /*
169 * parse the format descriptor and stores the possible sample rates
170 * on the audioformat table (audio class v1).
171 *
172 * @dev: usb device
173 * @fp: audioformat record
174 * @fmt: the format descriptor
175 * @offset: the start offset of descriptor pointing the rate type
176 * (7 for type I and II, 8 for type II)
177 */
parse_audio_format_rates_v1(struct snd_usb_audio * chip,struct audioformat * fp,unsigned char * fmt,int offset)178 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
179 unsigned char *fmt, int offset)
180 {
181 int nr_rates = fmt[offset];
182
183 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
184 usb_audio_err(chip,
185 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
186 fp->iface, fp->altsetting);
187 return -EINVAL;
188 }
189
190 if (nr_rates) {
191 /*
192 * build the rate table and bitmap flags
193 */
194 int r, idx;
195
196 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
197 GFP_KERNEL);
198 if (fp->rate_table == NULL)
199 return -ENOMEM;
200
201 fp->nr_rates = 0;
202 fp->rate_min = fp->rate_max = 0;
203 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
204 unsigned int rate = combine_triple(&fmt[idx]);
205 if (!rate)
206 continue;
207 /* C-Media CM6501 mislabels its 96 kHz altsetting */
208 /* Terratec Aureon 7.1 USB C-Media 6206, too */
209 if (rate == 48000 && nr_rates == 1 &&
210 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
211 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
212 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
213 fp->altsetting == 5 && fp->maxpacksize == 392)
214 rate = 96000;
215 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
216 if (rate == 16000 &&
217 (chip->usb_id == USB_ID(0x041e, 0x4064) ||
218 chip->usb_id == USB_ID(0x041e, 0x4068)))
219 rate = 8000;
220
221 fp->rate_table[fp->nr_rates] = rate;
222 if (!fp->rate_min || rate < fp->rate_min)
223 fp->rate_min = rate;
224 if (!fp->rate_max || rate > fp->rate_max)
225 fp->rate_max = rate;
226 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
227 fp->nr_rates++;
228 }
229 if (!fp->nr_rates) {
230 hwc_debug("All rates were zero. Skipping format!\n");
231 return -EINVAL;
232 }
233 } else {
234 /* continuous rates */
235 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
236 fp->rate_min = combine_triple(&fmt[offset + 1]);
237 fp->rate_max = combine_triple(&fmt[offset + 4]);
238 }
239
240 /* Jabra Evolve 65 headset */
241 if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) {
242 /* only 48kHz for playback while keeping 16kHz for capture */
243 if (fp->nr_rates != 1)
244 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
245 }
246
247 return 0;
248 }
249
250
251 /*
252 * Presonus Studio 1810c supports a limited set of sampling
253 * rates per altsetting but reports the full set each time.
254 * If we don't filter out the unsupported rates and attempt
255 * to configure the card, it will hang refusing to do any
256 * further audio I/O until a hard reset is performed.
257 *
258 * The list of supported rates per altsetting (set of available
259 * I/O channels) is described in the owner's manual, section 2.2.
260 */
s1810c_valid_sample_rate(struct audioformat * fp,unsigned int rate)261 static bool s1810c_valid_sample_rate(struct audioformat *fp,
262 unsigned int rate)
263 {
264 switch (fp->altsetting) {
265 case 1:
266 /* All ADAT ports available */
267 return rate <= 48000;
268 case 2:
269 /* Half of ADAT ports available */
270 return (rate == 88200 || rate == 96000);
271 case 3:
272 /* Analog I/O only (no S/PDIF nor ADAT) */
273 return rate >= 176400;
274 default:
275 return false;
276 }
277 return false;
278 }
279
280 /*
281 * Many Focusrite devices supports a limited set of sampling rates per
282 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
283 * descriptor which has a non-standard bLength = 10.
284 */
focusrite_valid_sample_rate(struct snd_usb_audio * chip,struct audioformat * fp,unsigned int rate)285 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
286 struct audioformat *fp,
287 unsigned int rate)
288 {
289 struct usb_interface *iface;
290 struct usb_host_interface *alts;
291 unsigned char *fmt;
292 unsigned int max_rate;
293
294 iface = usb_ifnum_to_if(chip->dev, fp->iface);
295 if (!iface)
296 return true;
297
298 alts = &iface->altsetting[fp->altset_idx];
299 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
300 NULL, UAC_FORMAT_TYPE);
301 if (!fmt)
302 return true;
303
304 if (fmt[0] == 10) { /* bLength */
305 max_rate = combine_quad(&fmt[6]);
306
307 /* Validate max rate */
308 if (max_rate != 48000 &&
309 max_rate != 96000 &&
310 max_rate != 192000 &&
311 max_rate != 384000) {
312
313 usb_audio_info(chip,
314 "%u:%d : unexpected max rate: %u\n",
315 fp->iface, fp->altsetting, max_rate);
316
317 return true;
318 }
319
320 return rate <= max_rate;
321 }
322
323 return true;
324 }
325
326 /*
327 * Helper function to walk the array of sample rate triplets reported by
328 * the device. The problem is that we need to parse whole array first to
329 * get to know how many sample rates we have to expect.
330 * Then fp->rate_table can be allocated and filled.
331 */
parse_uac2_sample_rate_range(struct snd_usb_audio * chip,struct audioformat * fp,int nr_triplets,const unsigned char * data)332 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
333 struct audioformat *fp, int nr_triplets,
334 const unsigned char *data)
335 {
336 int i, nr_rates = 0;
337
338 fp->rates = fp->rate_min = fp->rate_max = 0;
339
340 for (i = 0; i < nr_triplets; i++) {
341 int min = combine_quad(&data[2 + 12 * i]);
342 int max = combine_quad(&data[6 + 12 * i]);
343 int res = combine_quad(&data[10 + 12 * i]);
344 unsigned int rate;
345
346 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
347 continue;
348
349 /*
350 * for ranges with res == 1, we announce a continuous sample
351 * rate range, and this function should return 0 for no further
352 * parsing.
353 */
354 if (res == 1) {
355 fp->rate_min = min;
356 fp->rate_max = max;
357 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
358 return 0;
359 }
360
361 for (rate = min; rate <= max; rate += res) {
362
363 /* Filter out invalid rates on Presonus Studio 1810c */
364 if (chip->usb_id == USB_ID(0x0194f, 0x010c) &&
365 !s1810c_valid_sample_rate(fp, rate))
366 goto skip_rate;
367
368 /* Filter out invalid rates on Focusrite devices */
369 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
370 !focusrite_valid_sample_rate(chip, fp, rate))
371 goto skip_rate;
372
373 if (fp->rate_table)
374 fp->rate_table[nr_rates] = rate;
375 if (!fp->rate_min || rate < fp->rate_min)
376 fp->rate_min = rate;
377 if (!fp->rate_max || rate > fp->rate_max)
378 fp->rate_max = rate;
379 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
380
381 nr_rates++;
382 if (nr_rates >= MAX_NR_RATES) {
383 usb_audio_err(chip, "invalid uac2 rates\n");
384 break;
385 }
386
387 skip_rate:
388 /* avoid endless loop */
389 if (res == 0)
390 break;
391 }
392 }
393
394 return nr_rates;
395 }
396
397 /* Line6 Helix series and the Rode Rodecaster Pro don't support the
398 * UAC2_CS_RANGE usb function call. Return a static table of known
399 * clock rates.
400 */
line6_parse_audio_format_rates_quirk(struct snd_usb_audio * chip,struct audioformat * fp)401 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
402 struct audioformat *fp)
403 {
404 switch (chip->usb_id) {
405 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
406 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
407 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
408 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
409 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
410 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
411 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
412 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
413 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
414 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
415 }
416
417 return -ENODEV;
418 }
419
420 /*
421 * parse the format descriptor and stores the possible sample rates
422 * on the audioformat table (audio class v2 and v3).
423 */
parse_audio_format_rates_v2v3(struct snd_usb_audio * chip,struct audioformat * fp)424 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
425 struct audioformat *fp)
426 {
427 struct usb_device *dev = chip->dev;
428 unsigned char tmp[2], *data;
429 int nr_triplets, data_size, ret = 0, ret_l6;
430 int clock = snd_usb_clock_find_source(chip, fp, false);
431
432 if (clock < 0) {
433 dev_err(&dev->dev,
434 "%s(): unable to find clock source (clock %d)\n",
435 __func__, clock);
436 goto err;
437 }
438
439 /* get the number of sample rates first by only fetching 2 bytes */
440 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
441 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
442 UAC2_CS_CONTROL_SAM_FREQ << 8,
443 snd_usb_ctrl_intf(chip) | (clock << 8),
444 tmp, sizeof(tmp));
445
446 if (ret < 0) {
447 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
448 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
449 if (ret_l6 == -ENODEV) {
450 /* no line6 device found continue showing the error */
451 dev_err(&dev->dev,
452 "%s(): unable to retrieve number of sample rates (clock %d)\n",
453 __func__, clock);
454 goto err;
455 }
456 if (ret_l6 == 0) {
457 dev_info(&dev->dev,
458 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
459 __func__, clock);
460 return 0;
461 }
462 ret = ret_l6;
463 goto err;
464 }
465
466 nr_triplets = (tmp[1] << 8) | tmp[0];
467 data_size = 2 + 12 * nr_triplets;
468 data = kzalloc(data_size, GFP_KERNEL);
469 if (!data) {
470 ret = -ENOMEM;
471 goto err;
472 }
473
474 /* now get the full information */
475 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
476 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
477 UAC2_CS_CONTROL_SAM_FREQ << 8,
478 snd_usb_ctrl_intf(chip) | (clock << 8),
479 data, data_size);
480
481 if (ret < 0) {
482 dev_err(&dev->dev,
483 "%s(): unable to retrieve sample rate range (clock %d)\n",
484 __func__, clock);
485 ret = -EINVAL;
486 goto err_free;
487 }
488
489 /* Call the triplet parser, and make sure fp->rate_table is NULL.
490 * We just use the return value to know how many sample rates we
491 * will have to deal with. */
492 kfree(fp->rate_table);
493 fp->rate_table = NULL;
494 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
495
496 if (fp->nr_rates == 0) {
497 /* SNDRV_PCM_RATE_CONTINUOUS */
498 ret = 0;
499 goto err_free;
500 }
501
502 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
503 if (!fp->rate_table) {
504 ret = -ENOMEM;
505 goto err_free;
506 }
507
508 /* Call the triplet parser again, but this time, fp->rate_table is
509 * allocated, so the rates will be stored */
510 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
511
512 err_free:
513 kfree(data);
514 err:
515 return ret;
516 }
517
518 /*
519 * parse the format type I and III descriptors
520 */
parse_audio_format_i(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)521 static int parse_audio_format_i(struct snd_usb_audio *chip,
522 struct audioformat *fp, u64 format,
523 void *_fmt)
524 {
525 snd_pcm_format_t pcm_format;
526 unsigned int fmt_type;
527 int ret;
528
529 switch (fp->protocol) {
530 default:
531 case UAC_VERSION_1:
532 case UAC_VERSION_2: {
533 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
534
535 fmt_type = fmt->bFormatType;
536 break;
537 }
538 case UAC_VERSION_3: {
539 /* fp->fmt_type is already set in this case */
540 fmt_type = fp->fmt_type;
541 break;
542 }
543 }
544
545 if (fmt_type == UAC_FORMAT_TYPE_III) {
546 /* FIXME: the format type is really IECxxx
547 * but we give normal PCM format to get the existing
548 * apps working...
549 */
550 switch (chip->usb_id) {
551
552 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
553 if (chip->setup == 0x00 &&
554 fp->altsetting == 6)
555 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
556 else
557 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
558 break;
559 default:
560 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
561 }
562 fp->formats = pcm_format_to_bits(pcm_format);
563 } else {
564 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
565 if (!fp->formats)
566 return -EINVAL;
567 }
568
569 /* gather possible sample rates */
570 /* audio class v1 reports possible sample rates as part of the
571 * proprietary class specific descriptor.
572 * audio class v2 uses class specific EP0 range requests for that.
573 */
574 switch (fp->protocol) {
575 default:
576 case UAC_VERSION_1: {
577 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
578
579 fp->channels = fmt->bNrChannels;
580 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
581 break;
582 }
583 case UAC_VERSION_2:
584 case UAC_VERSION_3: {
585 /* fp->channels is already set in this case */
586 ret = parse_audio_format_rates_v2v3(chip, fp);
587 break;
588 }
589 }
590
591 if (fp->channels < 1) {
592 usb_audio_err(chip,
593 "%u:%d : invalid channels %d\n",
594 fp->iface, fp->altsetting, fp->channels);
595 return -EINVAL;
596 }
597
598 return ret;
599 }
600
601 /*
602 * parse the format type II descriptor
603 */
parse_audio_format_ii(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)604 static int parse_audio_format_ii(struct snd_usb_audio *chip,
605 struct audioformat *fp,
606 u64 format, void *_fmt)
607 {
608 int brate, framesize, ret;
609
610 switch (format) {
611 case UAC_FORMAT_TYPE_II_AC3:
612 /* FIXME: there is no AC3 format defined yet */
613 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
614 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
615 break;
616 case UAC_FORMAT_TYPE_II_MPEG:
617 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
618 break;
619 default:
620 usb_audio_info(chip,
621 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
622 fp->iface, fp->altsetting, format);
623 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
624 break;
625 }
626
627 fp->channels = 1;
628
629 switch (fp->protocol) {
630 default:
631 case UAC_VERSION_1: {
632 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
633 brate = le16_to_cpu(fmt->wMaxBitRate);
634 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
635 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
636 fp->frame_size = framesize;
637 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
638 break;
639 }
640 case UAC_VERSION_2: {
641 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
642 brate = le16_to_cpu(fmt->wMaxBitRate);
643 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
644 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
645 fp->frame_size = framesize;
646 ret = parse_audio_format_rates_v2v3(chip, fp);
647 break;
648 }
649 }
650
651 return ret;
652 }
653
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)654 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
655 struct audioformat *fp, u64 format,
656 struct uac_format_type_i_continuous_descriptor *fmt,
657 int stream)
658 {
659 int err;
660
661 switch (fmt->bFormatType) {
662 case UAC_FORMAT_TYPE_I:
663 case UAC_FORMAT_TYPE_III:
664 err = parse_audio_format_i(chip, fp, format, fmt);
665 break;
666 case UAC_FORMAT_TYPE_II:
667 err = parse_audio_format_ii(chip, fp, format, fmt);
668 break;
669 default:
670 usb_audio_info(chip,
671 "%u:%d : format type %d is not supported yet\n",
672 fp->iface, fp->altsetting,
673 fmt->bFormatType);
674 return -ENOTSUPP;
675 }
676 fp->fmt_type = fmt->bFormatType;
677 if (err < 0)
678 return err;
679 #if 1
680 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
681 /* extigy apparently supports sample rates other than 48k
682 * but not in ordinary way. so we enable only 48k atm.
683 */
684 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
685 chip->usb_id == USB_ID(0x041e, 0x3020) ||
686 chip->usb_id == USB_ID(0x041e, 0x3061)) {
687 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
688 fp->rates != SNDRV_PCM_RATE_48000 &&
689 fp->rates != SNDRV_PCM_RATE_96000)
690 return -ENOTSUPP;
691 }
692 #endif
693 return 0;
694 }
695
snd_usb_parse_audio_format_v3(struct snd_usb_audio * chip,struct audioformat * fp,struct uac3_as_header_descriptor * as,int stream)696 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
697 struct audioformat *fp,
698 struct uac3_as_header_descriptor *as,
699 int stream)
700 {
701 u64 format = le64_to_cpu(as->bmFormats);
702 int err;
703
704 /*
705 * Type I format bits are D0..D6
706 * This test works because type IV is not supported
707 */
708 if (format & 0x7f)
709 fp->fmt_type = UAC_FORMAT_TYPE_I;
710 else
711 fp->fmt_type = UAC_FORMAT_TYPE_III;
712
713 err = parse_audio_format_i(chip, fp, format, as);
714 if (err < 0)
715 return err;
716
717 return 0;
718 }
719
