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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 "clock.h"
20#include "format.h"
21
22/*
23 * parse the audio format type I descriptor
24 * and returns the corresponding pcm format
25 *
26 * @dev: usb device
27 * @fp: audioformat record
28 * @format: the format tag (wFormatTag)
29 * @fmt: the format type descriptor (v1/v2) or AudioStreaming descriptor (v3)
30 */
31static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
32 struct audioformat *fp,
33 u64 format, void *_fmt)
34{
35 int sample_width, sample_bytes;
36 u64 pcm_formats = 0;
37
38 switch (fp->protocol) {
39 case UAC_VERSION_1:
40 default: {
41 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
42 if (format >= 64) {
43 usb_audio_info(chip,
44 "%u:%d: invalid format type 0x%llx is detected, processed as PCM\n",
45 fp->iface, fp->altsetting, format);
46 format = UAC_FORMAT_TYPE_I_PCM;
47 }
48 sample_width = fmt->bBitResolution;
49 sample_bytes = fmt->bSubframeSize;
50 format = 1ULL << format;
51 break;
52 }
53
54 case UAC_VERSION_2: {
55 struct uac_format_type_i_ext_descriptor *fmt = _fmt;
56 sample_width = fmt->bBitResolution;
57 sample_bytes = fmt->bSubslotSize;
58
59 if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
60 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
61 /* flag potentially raw DSD capable altsettings */
62 fp->dsd_raw = true;
63 /* clear special format bit to avoid "unsupported format" msg below */
64 format &= ~UAC2_FORMAT_TYPE_I_RAW_DATA;
65 }
66
67 format <<= 1;
68 break;
69 }
70 case UAC_VERSION_3: {
71 struct uac3_as_header_descriptor *as = _fmt;
72
73 sample_width = as->bBitResolution;
74 sample_bytes = as->bSubslotSize;
75
76 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA) {
77 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
78 /* clear special format bit to avoid "unsupported format" msg below */
79 format &= ~UAC3_FORMAT_TYPE_I_RAW_DATA;
80 }
81
82 format <<= 1;
83 break;
84 }
85 }
86
87 fp->fmt_bits = sample_width;
88
89 if ((pcm_formats == 0) &&
90 (format == 0 || format == BIT(UAC_FORMAT_TYPE_I_UNDEFINED))) {
91 /* some devices don't define this correctly... */
92 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
93 fp->iface, fp->altsetting);
94 format = BIT(UAC_FORMAT_TYPE_I_PCM);
95 }
96 if (format & BIT(UAC_FORMAT_TYPE_I_PCM)) {
97 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
98 /* Edirol SD-90 */
99 (chip->usb_id == USB_ID(0x0582, 0x000c))) &&
100 /* Roland SC-D70 */
101 sample_width == 24 && sample_bytes == 2)
102 sample_bytes = 3;
103 else if (sample_width > sample_bytes * 8) {
104 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
105 fp->iface, fp->altsetting,
106 sample_width, sample_bytes);
107 }
108 /* check the format byte size */
109 switch (sample_bytes) {
110 case 1:
111 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
112 break;
113 case 2:
114 if (snd_usb_is_big_endian_format(chip, fp))
115 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
116 else
117 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
118 break;
119 case 3:
120 if (snd_usb_is_big_endian_format(chip, fp))
121 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
122 else
123 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
124 break;
125 case 4:
126 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
127 break;
128 default:
129 usb_audio_info(chip,
130 "%u:%d : unsupported sample bitwidth %d in %d bytes\n",
131 fp->iface, fp->altsetting,
132 sample_width, sample_bytes);
133 break;
134 }
135 }
136 if (format & BIT(UAC_FORMAT_TYPE_I_PCM8)) {
137 /* Dallas DS4201 workaround: it advertises U8 format, but really
138 supports S8. */
139 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
140 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
141 else
142 pcm_formats |= SNDRV_PCM_FMTBIT_U8;
143 }
144 if (format & BIT(UAC_FORMAT_TYPE_I_IEEE_FLOAT))
145 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
146 if (format & BIT(UAC_FORMAT_TYPE_I_ALAW))
147 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
148 if (format & BIT(UAC_FORMAT_TYPE_I_MULAW))
149 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
150 if (format & ~0x3f) {
151 usb_audio_info(chip,
152 "%u:%d : unsupported format bits %#llx\n",
153 fp->iface, fp->altsetting, format);
154 }
155
156 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
157
158 return pcm_formats;
159}
160
161static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
162{
163 kfree(fp->rate_table);
164 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
165 if (!fp->rate_table)
166 return -ENOMEM;
167 fp->nr_rates = 1;
168 fp->rate_min = rate;
169 fp->rate_max = rate;
170 fp->rates = rate_bits;
171 fp->rate_table[0] = rate;
172 return 0;
173}
174
175/* set up rate_min, rate_max and rates from the rate table */
176static void set_rate_table_min_max(struct audioformat *fp)
177{
178 unsigned int rate;
179 int i;
180
181 fp->rate_min = INT_MAX;
182 fp->rate_max = 0;
183 fp->rates = 0;
184 for (i = 0; i < fp->nr_rates; i++) {
185 rate = fp->rate_table[i];
186 fp->rate_min = min(fp->rate_min, rate);
187 fp->rate_max = max(fp->rate_max, rate);
188 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
189 }
190}
191
192/*
193 * parse the format descriptor and stores the possible sample rates
194 * on the audioformat table (audio class v1).
195 *
196 * @dev: usb device
197 * @fp: audioformat record
198 * @fmt: the format descriptor
199 * @offset: the start offset of descriptor pointing the rate type
200 * (7 for type I and II, 8 for type II)
201 */
202static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
203 unsigned char *fmt, int offset)
204{
205 int nr_rates = fmt[offset];
206
207 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
208 usb_audio_err(chip,
209 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
210 fp->iface, fp->altsetting);
211 return -EINVAL;
212 }
213
214 if (nr_rates) {
215 /*
216 * build the rate table and bitmap flags
217 */
218 int r, idx;
219
220 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
221 GFP_KERNEL);
222 if (fp->rate_table == NULL)
223 return -ENOMEM;
224
225 fp->nr_rates = 0;
226 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
227 unsigned int rate = combine_triple(&fmt[idx]);
228 if (!rate)
229 continue;
230 /* C-Media CM6501 mislabels its 96 kHz altsetting */
231 /* Terratec Aureon 7.1 USB C-Media 6206, too */
232 /* Ozone Z90 USB C-Media, too */
233 if (rate == 48000 && nr_rates == 1 &&
234 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
235 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
236 chip->usb_id == USB_ID(0x0d8c, 0x0078) ||
237 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
238 fp->altsetting == 5 && fp->maxpacksize == 392)
239 rate = 96000;
240 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
241 if (rate == 16000 &&
242 (chip->usb_id == USB_ID(0x041e, 0x4064) ||
243 chip->usb_id == USB_ID(0x041e, 0x4068)))
244 rate = 8000;
245
246 fp->rate_table[fp->nr_rates++] = rate;
247 }
248 if (!fp->nr_rates) {
249 usb_audio_info(chip,
250 "%u:%d: All rates were zero\n",
251 fp->iface, fp->altsetting);
252 return -EINVAL;
253 }
254 set_rate_table_min_max(fp);
255 } else {
256 /* continuous rates */
257 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
258 fp->rate_min = combine_triple(&fmt[offset + 1]);
259 fp->rate_max = combine_triple(&fmt[offset + 4]);
260 }
261
262 /* Jabra Evolve 65 headset */
263 if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) {
264 /* only 48kHz for playback while keeping 16kHz for capture */
265 if (fp->nr_rates != 1)
266 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
267 }
268
269 return 0;
270}
271
272
273/*
274 * Presonus Studio 1810c supports a limited set of sampling
275 * rates per altsetting but reports the full set each time.
276 * If we don't filter out the unsupported rates and attempt
277 * to configure the card, it will hang refusing to do any
278 * further audio I/O until a hard reset is performed.
279 *
280 * The list of supported rates per altsetting (set of available
281 * I/O channels) is described in the owner's manual, section 2.2.
282 */
283static bool s1810c_valid_sample_rate(struct audioformat *fp,
284 unsigned int rate)
285{
286 switch (fp->altsetting) {
287 case 1:
288 /* All ADAT ports available */
289 return rate <= 48000;
290 case 2:
291 /* Half of ADAT ports available */
292 return (rate == 88200 || rate == 96000);
293 case 3:
294 /* Analog I/O only (no S/PDIF nor ADAT) */
295 return rate >= 176400;
296 default:
297 return false;
298 }
299 return false;
300}
301
302/*
303 * Many Focusrite devices supports a limited set of sampling rates per
304 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
305 * descriptor which has a non-standard bLength = 10.
306 */
307static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
308 struct audioformat *fp,
309 unsigned int rate)
310{
311 struct usb_interface *iface;
312 struct usb_host_interface *alts;
313 unsigned char *fmt;
314 unsigned int max_rate;
315
316 iface = usb_ifnum_to_if(chip->dev, fp->iface);
317 if (!iface)
318 return true;
319
320 alts = &iface->altsetting[fp->altset_idx];
321 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
322 NULL, UAC_FORMAT_TYPE);
323 if (!fmt)
324 return true;
325
326 if (fmt[0] == 10) { /* bLength */
327 max_rate = combine_quad(&fmt[6]);
328
329 /* Validate max rate */
330 if (max_rate != 48000 &&
331 max_rate != 96000 &&
332 max_rate != 192000 &&
333 max_rate != 384000) {
334
335 usb_audio_info(chip,
336 "%u:%d : unexpected max rate: %u\n",
337 fp->iface, fp->altsetting, max_rate);
338
339 return true;
340 }
341
342 return rate <= max_rate;
343 }
344
345 return true;
346}
347
348/*
349 * Helper function to walk the array of sample rate triplets reported by
350 * the device. The problem is that we need to parse whole array first to
351 * get to know how many sample rates we have to expect.
352 * Then fp->rate_table can be allocated and filled.
353 */
354static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
355 struct audioformat *fp, int nr_triplets,
356 const unsigned char *data)
357{
358 int i, nr_rates = 0;
359
360 for (i = 0; i < nr_triplets; i++) {
361 int min = combine_quad(&data[2 + 12 * i]);
362 int max = combine_quad(&data[6 + 12 * i]);
363 int res = combine_quad(&data[10 + 12 * i]);
364 unsigned int rate;
365
366 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
367 continue;
368
369 /*
370 * for ranges with res == 1, we announce a continuous sample
371 * rate range, and this function should return 0 for no further
372 * parsing.
373 */
374 if (res == 1) {
375 fp->rate_min = min;
376 fp->rate_max = max;
377 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
378 return 0;
379 }
380
381 for (rate = min; rate <= max; rate += res) {
382
383 /* Filter out invalid rates on Presonus Studio 1810c */
384 if (chip->usb_id == USB_ID(0x194f, 0x010c) &&
385 !s1810c_valid_sample_rate(fp, rate))
386 goto skip_rate;
387
388 /* Filter out invalid rates on Focusrite devices */
389 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
390 !focusrite_valid_sample_rate(chip, fp, rate))
391 goto skip_rate;
392
393 if (fp->rate_table)
394 fp->rate_table[nr_rates] = rate;
395 nr_rates++;
396 if (nr_rates >= MAX_NR_RATES) {
397 usb_audio_err(chip, "invalid uac2 rates\n");
398 break;
399 }
400
401skip_rate:
402 /* avoid endless loop */
403 if (res == 0)
404 break;
405 }
406 }
407
408 return nr_rates;
409}
410
411/* Line6 Helix series and the Rode Rodecaster Pro don't support the
412 * UAC2_CS_RANGE usb function call. Return a static table of known
413 * clock rates.
414 */
415static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
416 struct audioformat *fp)
417{
418 switch (chip->usb_id) {
419 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
420 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
421 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
422 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
423 case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */
424 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
425 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
426 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
427 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
428 case USB_ID(0x0e41, 0x424b): /* Line6 Pod Go */
429 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
430 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
431 }
432
433 return -ENODEV;
434}
435
436/* check whether the given altsetting is supported for the already set rate */
437static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,
438 int altsetting)
439{
440 struct usb_device *dev = chip->dev;
441 __le64 raw_data = 0;
442 u64 data;
443 int err;
444
445 /* we assume 64bit is enough for any altsettings */
446 if (snd_BUG_ON(altsetting >= 64 - 8))
447 return false;
448
449 err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
450 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
451 UAC2_AS_VAL_ALT_SETTINGS << 8,
452 iface, &raw_data, sizeof(raw_data));
453 if (err < 0)
454 return false;
455
456 data = le64_to_cpu(raw_data);
457 /* first byte contains the bitmap size */
458 if ((data & 0xff) * 8 < altsetting)
459 return false;
460 if (data & (1ULL << (altsetting + 8)))
461 return true;
462
463 return false;
464}
465
466/*
467 * Validate each sample rate with the altsetting
468 * Rebuild the rate table if only partial values are valid
469 */
470static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,
471 struct audioformat *fp,
472 int clock)
473{
474 struct usb_device *dev = chip->dev;
475 struct usb_host_interface *alts;
476 unsigned int *table;
477 unsigned int nr_rates;
478 int i, err;
479 u32 bmControls;
480
481 /* performing the rate verification may lead to unexpected USB bus
482 * behavior afterwards by some unknown reason. Do this only for the
483 * known devices.
484 */
485 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES))
486 return 0; /* don't perform the validation as default */
487
488 alts = snd_usb_get_host_interface(chip, fp->iface, fp->altsetting);
489 if (!alts)
490 return 0;
491
492 if (fp->protocol == UAC_VERSION_3) {
493 struct uac3_as_header_descriptor *as = snd_usb_find_csint_desc(
494 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
495 bmControls = le32_to_cpu(as->bmControls);
496 } else {
497 struct uac2_as_header_descriptor *as = snd_usb_find_csint_desc(
498 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
499 bmControls = as->bmControls;
500 }
501
502 if (!uac_v2v3_control_is_readable(bmControls,
503 UAC2_AS_VAL_ALT_SETTINGS))
504 return 0;
505
506 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
507 if (!table)
508 return -ENOMEM;
509
510 /* clear the interface altsetting at first */
511 usb_set_interface(dev, fp->iface, 0);
512
513 nr_rates = 0;
514 for (i = 0; i < fp->nr_rates; i++) {
515 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
516 fp->rate_table[i]);
517 if (err < 0)
518 continue;
519
520 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))
521 table[nr_rates++] = fp->rate_table[i];
522 }
523
524 if (!nr_rates) {
525 usb_audio_dbg(chip,
526 "No valid sample rate available for %d:%d, assuming a firmware bug\n",
527 fp->iface, fp->altsetting);
528 nr_rates = fp->nr_rates; /* continue as is */
529 }
530
531 if (fp->nr_rates == nr_rates) {
532 kfree(table);
533 return 0;
534 }
535
536 kfree(fp->rate_table);
537 fp->rate_table = table;
538 fp->nr_rates = nr_rates;
539 return 0;
540}
541
542/*
543 * parse the format descriptor and stores the possible sample rates
544 * on the audioformat table (audio class v2 and v3).
545 */
546static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
547 struct audioformat *fp)
548{
549 struct usb_device *dev = chip->dev;
550 unsigned char tmp[2], *data;
551 int nr_triplets, data_size, ret = 0, ret_l6;
552 int clock = snd_usb_clock_find_source(chip, fp, false);
553 struct usb_host_interface *ctrl_intf;
554
555 ctrl_intf = snd_usb_find_ctrl_interface(chip, fp->iface);
556 if (clock < 0) {
557 dev_err(&dev->dev,
558 "%s(): unable to find clock source (clock %d)\n",
559 __func__, clock);
560 goto err;
561 }
562
563 /* get the number of sample rates first by only fetching 2 bytes */
564 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
565 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
566 UAC2_CS_CONTROL_SAM_FREQ << 8,
567 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8),
568 tmp, sizeof(tmp));
569
570 if (ret < 0) {
571 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
572 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
573 if (ret_l6 == -ENODEV) {
574 /* no line6 device found continue showing the error */
575 dev_err(&dev->dev,
576 "%s(): unable to retrieve number of sample rates (clock %d)\n",
577 __func__, clock);
578 goto err;
579 }
580 if (ret_l6 == 0) {
581 dev_info(&dev->dev,
582 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
583 __func__, clock);
584 return 0;
585 }
586 ret = ret_l6;
587 goto err;
588 }
589
590 nr_triplets = (tmp[1] << 8) | tmp[0];
591 data_size = 2 + 12 * nr_triplets;
592 data = kzalloc(data_size, GFP_KERNEL);
593 if (!data) {
594 ret = -ENOMEM;
595 goto err;
596 }
597
598 /* now get the full information */
599 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
600 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
601 UAC2_CS_CONTROL_SAM_FREQ << 8,
602 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8),
603 data, data_size);
604
605 if (ret < 0) {
606 dev_err(&dev->dev,
607 "%s(): unable to retrieve sample rate range (clock %d)\n",
608 __func__, clock);
609 ret = -EINVAL;
610 goto err_free;
611 }
612
613 /* Call the triplet parser, and make sure fp->rate_table is NULL.
614 * We just use the return value to know how many sample rates we
615 * will have to deal with. */
616 kfree(fp->rate_table);
617 fp->rate_table = NULL;
618 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
619
620 if (fp->nr_rates == 0) {
621 /* SNDRV_PCM_RATE_CONTINUOUS */
622 ret = 0;
623 goto err_free;
624 }
625
626 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
627 if (!fp->rate_table) {
628 ret = -ENOMEM;
629 goto err_free;
630 }
631
632 /* Call the triplet parser again, but this time, fp->rate_table is
633 * allocated, so the rates will be stored */
634 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
635
636 ret = validate_sample_rate_table_v2v3(chip, fp, clock);
637 if (ret < 0)
638 goto err_free;
639
640 set_rate_table_min_max(fp);
641
642err_free:
643 kfree(data);
644err:
645 return ret;
646}
647
648/*
649 * parse the format type I and III descriptors
650 */
651static int parse_audio_format_i(struct snd_usb_audio *chip,
652 struct audioformat *fp, u64 format,
653 void *_fmt)
654{
655 snd_pcm_format_t pcm_format;
656 unsigned int fmt_type;
657 int ret;
658
659 switch (fp->protocol) {
660 default:
661 case UAC_VERSION_1:
662 case UAC_VERSION_2: {
663 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
664
665 fmt_type = fmt->bFormatType;
666 break;
667 }
668 case UAC_VERSION_3: {
669 /* fp->fmt_type is already set in this case */
670 fmt_type = fp->fmt_type;
671 break;
672 }
673 }
674
675 if (fmt_type == UAC_FORMAT_TYPE_III) {
676 /* FIXME: the format type is really IECxxx
677 * but we give normal PCM format to get the existing
678 * apps working...
679 */
680 switch (chip->usb_id) {
681
682 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
683 if (chip->setup == 0x00 &&
684 fp->altsetting == 6)
685 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
686 else
687 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
688 break;
689 default:
690 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
691 }
692 fp->formats = pcm_format_to_bits(pcm_format);
693 } else {
694 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
695 if (!fp->formats)
696 return -EINVAL;
697 }
698
699 /* gather possible sample rates */
700 /* audio class v1 reports possible sample rates as part of the
701 * proprietary class specific descriptor.
702 * audio class v2 uses class specific EP0 range requests for that.
703 */
704 switch (fp->protocol) {
705 default:
706 case UAC_VERSION_1: {
707 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
708
709 fp->channels = fmt->bNrChannels;
710 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
711 break;
712 }
713 case UAC_VERSION_2:
714 case UAC_VERSION_3: {
715 /* fp->channels is already set in this case */
716 ret = parse_audio_format_rates_v2v3(chip, fp);
717 break;
718 }
719 }
720
721 if (fp->channels < 1) {
722 usb_audio_err(chip,
723 "%u:%d : invalid channels %d\n",
724 fp->iface, fp->altsetting, fp->channels);
725 return -EINVAL;
726 }
727
728 return ret;
729}
730
731/*
732 * parse the format type II descriptor
733 */
734static int parse_audio_format_ii(struct snd_usb_audio *chip,
735 struct audioformat *fp,
736 u64 format, void *_fmt)
737{
738 int brate, framesize, ret;
739
740 switch (format) {
741 case UAC_FORMAT_TYPE_II_AC3:
742 /* FIXME: there is no AC3 format defined yet */
743 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
744 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
745 break;
746 case UAC_FORMAT_TYPE_II_MPEG:
747 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
748 break;
749 default:
750 usb_audio_info(chip,
751 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
752 fp->iface, fp->altsetting, format);
753 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
754 break;
755 }
756
757 fp->channels = 1;
758
759 switch (fp->protocol) {
760 default:
761 case UAC_VERSION_1: {
762 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
763 brate = le16_to_cpu(fmt->wMaxBitRate);
764 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
765 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
766 fp->frame_size = framesize;
767 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
768 break;
769 }
770 case UAC_VERSION_2: {
771 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
772 brate = le16_to_cpu(fmt->wMaxBitRate);
773 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
774 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
775 fp->frame_size = framesize;
776 ret = parse_audio_format_rates_v2v3(chip, fp);
777 break;
778 }
779 }
780
781 return ret;
782}
783
784int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
785 struct audioformat *fp, u64 format,
786 struct uac_format_type_i_continuous_descriptor *fmt,
787 int stream)
788{
789 int err;
790
791 switch (fmt->bFormatType) {
792 case UAC_FORMAT_TYPE_I:
793 case UAC_FORMAT_TYPE_III:
794 err = parse_audio_format_i(chip, fp, format, fmt);
795 break;
796 case UAC_FORMAT_TYPE_II:
797 err = parse_audio_format_ii(chip, fp, format, fmt);
798 break;
799 default:
800 usb_audio_info(chip,
801 "%u:%d : format type %d is not supported yet\n",
802 fp->iface, fp->altsetting,
803 fmt->bFormatType);
804 return -ENOTSUPP;
805 }
806 fp->fmt_type = fmt->bFormatType;
807 if (err < 0)
808 return err;
809#if 1
810 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
811 /* extigy apparently supports sample rates other than 48k
812 * but not in ordinary way. so we enable only 48k atm.
813 */
814 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
815 chip->usb_id == USB_ID(0x041e, 0x3020) ||
816 chip->usb_id == USB_ID(0x041e, 0x3061)) {
817 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
818 fp->rates != SNDRV_PCM_RATE_48000 &&
819 fp->rates != SNDRV_PCM_RATE_96000)
820 return -ENOTSUPP;
821 }
822#endif
823 return 0;
824}
825
826int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
827 struct audioformat *fp,
828 struct uac3_as_header_descriptor *as,
829 int stream)
830{
831 u64 format = le64_to_cpu(as->bmFormats);
832 int err;
833
834 /*
835 * Type I format bits are D0..D6
836 * This test works because type IV is not supported
837 */
838 if (format & 0x7f)
839 fp->fmt_type = UAC_FORMAT_TYPE_I;
840 else
841 fp->fmt_type = UAC_FORMAT_TYPE_III;
842
843 err = parse_audio_format_i(chip, fp, format, as);
844 if (err < 0)
845 return err;
846
847 return 0;
848}
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
18#include <linux/init.h>
19#include <linux/slab.h>
20#include <linux/usb.h>
21#include <linux/usb/audio.h>
22#include <linux/usb/audio-v2.h>
23
24#include <sound/core.h>
25#include <sound/pcm.h>
26
27#include "usbaudio.h"
28#include "card.h"
29#include "quirks.h"
30#include "helper.h"
31#include "debug.h"
32#include "clock.h"
33#include "format.h"
34
35/*
36 * parse the audio format type I descriptor
37 * and returns the corresponding pcm format
38 *
39 * @dev: usb device
40 * @fp: audioformat record
41 * @format: the format tag (wFormatTag)
42 * @fmt: the format type descriptor
43 */
44static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
45 struct audioformat *fp,
46 unsigned int format, void *_fmt)
47{
48 int sample_width, sample_bytes;
49 u64 pcm_formats = 0;
50
51 switch (fp->protocol) {
52 case UAC_VERSION_1:
53 default: {
54 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
55 sample_width = fmt->bBitResolution;
56 sample_bytes = fmt->bSubframeSize;
57 format = 1 << format;
58 break;
59 }
60
61 case UAC_VERSION_2: {
62 struct uac_format_type_i_ext_descriptor *fmt = _fmt;
63 sample_width = fmt->bBitResolution;
64 sample_bytes = fmt->bSubslotSize;
65
66 if (format & UAC2_FORMAT_TYPE_I_RAW_DATA)
67 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
68
69 format <<= 1;
70 break;
71 }
72 }
73
74 if ((pcm_formats == 0) &&
75 (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
76 /* some devices don't define this correctly... */
77 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
78 fp->iface, fp->altsetting);
79 format = 1 << UAC_FORMAT_TYPE_I_PCM;
80 }
81 if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
82 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
83 /* Edirol SD-90 */
84 (chip->usb_id == USB_ID(0x0582, 0x000c))) &&
85 /* Roland SC-D70 */
86 sample_width == 24 && sample_bytes == 2)
87 sample_bytes = 3;
88 else if (sample_width > sample_bytes * 8) {
89 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
90 fp->iface, fp->altsetting,
91 sample_width, sample_bytes);
92 }
93 /* check the format byte size */
94 switch (sample_bytes) {
95 case 1:
96 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
97 break;
98 case 2:
99 if (snd_usb_is_big_endian_format(chip, fp))
100 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
101 else
102 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
103 break;
104 case 3:
105 if (snd_usb_is_big_endian_format(chip, fp))
106 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
107 else
108 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
109 break;
110 case 4:
111 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
112 break;
113 default:
114 usb_audio_info(chip,
115 "%u:%d : unsupported sample bitwidth %d in %d bytes\n",
116 fp->iface, fp->altsetting,
117 sample_width, sample_bytes);
118 break;
119 }
120 }
121 if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
122 /* Dallas DS4201 workaround: it advertises U8 format, but really
123 supports S8. */
124 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
125 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
126 else
127 pcm_formats |= SNDRV_PCM_FMTBIT_U8;
128 }
129 if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
130 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
131 }
132 if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
133 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
134 }
135 if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
136 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
137 }
138 if (format & ~0x3f) {
139 usb_audio_info(chip,
140 "%u:%d : unsupported format bits %#x\n",
141 fp->iface, fp->altsetting, format);
142 }
143
144 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
145
146 return pcm_formats;
147}
148
149
150/*
151 * parse the format descriptor and stores the possible sample rates
152 * on the audioformat table (audio class v1).
153 *
154 * @dev: usb device
155 * @fp: audioformat record
156 * @fmt: the format descriptor
157 * @offset: the start offset of descriptor pointing the rate type
158 * (7 for type I and II, 8 for type II)
159 */
160static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
161 unsigned char *fmt, int offset)
162{
163 int nr_rates = fmt[offset];
164
165 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
166 usb_audio_err(chip,
167 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
168 fp->iface, fp->altsetting);
169 return -EINVAL;
170 }
171
172 if (nr_rates) {
173 /*
174 * build the rate table and bitmap flags
175 */
176 int r, idx;
177
178 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
179 if (fp->rate_table == NULL) {
180 usb_audio_err(chip, "cannot malloc\n");
181 return -ENOMEM;
182 }
183
184 fp->nr_rates = 0;
185 fp->rate_min = fp->rate_max = 0;
186 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
187 unsigned int rate = combine_triple(&fmt[idx]);
188 if (!rate)
189 continue;
190 /* C-Media CM6501 mislabels its 96 kHz altsetting */
191 /* Terratec Aureon 7.1 USB C-Media 6206, too */
192 if (rate == 48000 && nr_rates == 1 &&
193 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
194 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
195 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
196 fp->altsetting == 5 && fp->maxpacksize == 392)
197 rate = 96000;
198 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
199 if (rate == 16000 &&
200 (chip->usb_id == USB_ID(0x041e, 0x4064) ||
201 chip->usb_id == USB_ID(0x041e, 0x4068)))
202 rate = 8000;
203
204 fp->rate_table[fp->nr_rates] = rate;
205 if (!fp->rate_min || rate < fp->rate_min)
206 fp->rate_min = rate;
207 if (!fp->rate_max || rate > fp->rate_max)
208 fp->rate_max = rate;
209 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
210 fp->nr_rates++;
211 }
212 if (!fp->nr_rates) {
213 hwc_debug("All rates were zero. Skipping format!\n");
214 return -EINVAL;
215 }
216 } else {
217 /* continuous rates */
218 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
219 fp->rate_min = combine_triple(&fmt[offset + 1]);
220 fp->rate_max = combine_triple(&fmt[offset + 4]);
221 }
222 return 0;
223}
224
225/*
226 * Helper function to walk the array of sample rate triplets reported by
227 * the device. The problem is that we need to parse whole array first to
228 * get to know how many sample rates we have to expect.
229 * Then fp->rate_table can be allocated and filled.
230 */
231static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
232 struct audioformat *fp, int nr_triplets,
233 const unsigned char *data)
234{
235 int i, nr_rates = 0;
236
237 fp->rates = fp->rate_min = fp->rate_max = 0;
238
239 for (i = 0; i < nr_triplets; i++) {
240 int min = combine_quad(&data[2 + 12 * i]);
241 int max = combine_quad(&data[6 + 12 * i]);
242 int res = combine_quad(&data[10 + 12 * i]);
243 unsigned int rate;
244
245 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
246 continue;
247
248 /*
249 * for ranges with res == 1, we announce a continuous sample
250 * rate range, and this function should return 0 for no further
251 * parsing.
252 */
253 if (res == 1) {
254 fp->rate_min = min;
255 fp->rate_max = max;
256 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
257 return 0;
258 }
259
260 for (rate = min; rate <= max; rate += res) {
261 if (fp->rate_table)
262 fp->rate_table[nr_rates] = rate;
263 if (!fp->rate_min || rate < fp->rate_min)
264 fp->rate_min = rate;
265 if (!fp->rate_max || rate > fp->rate_max)
266 fp->rate_max = rate;
267 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
268
269 nr_rates++;
270 if (nr_rates >= MAX_NR_RATES) {
271 usb_audio_err(chip, "invalid uac2 rates\n");
272 break;
273 }
274
275 /* avoid endless loop */
276 if (res == 0)
277 break;
278 }
279 }
280
281 return nr_rates;
282}
283
284/*
285 * parse the format descriptor and stores the possible sample rates
286 * on the audioformat table (audio class v2).
287 */
288static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
289 struct audioformat *fp)
290{
291 struct usb_device *dev = chip->dev;
292 unsigned char tmp[2], *data;
293 int nr_triplets, data_size, ret = 0;
294 int clock = snd_usb_clock_find_source(chip, fp->clock, false);
295
296 if (clock < 0) {
297 dev_err(&dev->dev,
298 "%s(): unable to find clock source (clock %d)\n",
299 __func__, clock);
300 goto err;
301 }
302
303 /* get the number of sample rates first by only fetching 2 bytes */
304 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
305 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
306 UAC2_CS_CONTROL_SAM_FREQ << 8,
307 snd_usb_ctrl_intf(chip) | (clock << 8),
308 tmp, sizeof(tmp));
309
310 if (ret < 0) {
311 dev_err(&dev->dev,
312 "%s(): unable to retrieve number of sample rates (clock %d)\n",
313 __func__, clock);
314 goto err;
315 }
316
317 nr_triplets = (tmp[1] << 8) | tmp[0];
318 data_size = 2 + 12 * nr_triplets;
319 data = kzalloc(data_size, GFP_KERNEL);
320 if (!data) {
321 ret = -ENOMEM;
322 goto err;
323 }
324
325 /* now get the full information */
326 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
327 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
328 UAC2_CS_CONTROL_SAM_FREQ << 8,
329 snd_usb_ctrl_intf(chip) | (clock << 8),
330 data, data_size);
331
332 if (ret < 0) {
333 dev_err(&dev->dev,
334 "%s(): unable to retrieve sample rate range (clock %d)\n",
335 __func__, clock);
336 ret = -EINVAL;
337 goto err_free;
338 }
339
340 /* Call the triplet parser, and make sure fp->rate_table is NULL.
341 * We just use the return value to know how many sample rates we
342 * will have to deal with. */
343 kfree(fp->rate_table);
344 fp->rate_table = NULL;
345 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
346
347 if (fp->nr_rates == 0) {
348 /* SNDRV_PCM_RATE_CONTINUOUS */
349 ret = 0;
350 goto err_free;
351 }
352
353 fp->rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
354 if (!fp->rate_table) {
355 ret = -ENOMEM;
356 goto err_free;
357 }
358
359 /* Call the triplet parser again, but this time, fp->rate_table is
360 * allocated, so the rates will be stored */
361 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
362
363err_free:
364 kfree(data);
365err:
366 return ret;
367}
368
369/*
370 * parse the format type I and III descriptors
371 */
372static int parse_audio_format_i(struct snd_usb_audio *chip,
373 struct audioformat *fp, unsigned int format,
374 struct uac_format_type_i_continuous_descriptor *fmt)
375{
376 snd_pcm_format_t pcm_format;
377 int ret;
378
379 if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
380 /* FIXME: the format type is really IECxxx
381 * but we give normal PCM format to get the existing
382 * apps working...
383 */
384 switch (chip->usb_id) {
385
386 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
387 if (chip->setup == 0x00 &&
388 fp->altsetting == 6)
389 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
390 else
391 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
392 break;
393 default:
394 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
395 }
396 fp->formats = pcm_format_to_bits(pcm_format);
397 } else {
398 fp->formats = parse_audio_format_i_type(chip, fp, format, fmt);
399 if (!fp->formats)
400 return -EINVAL;
401 }
402
403 /* gather possible sample rates */
404 /* audio class v1 reports possible sample rates as part of the
405 * proprietary class specific descriptor.
406 * audio class v2 uses class specific EP0 range requests for that.
407 */
408 switch (fp->protocol) {
409 default:
410 case UAC_VERSION_1:
411 fp->channels = fmt->bNrChannels;
412 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
413 break;
414 case UAC_VERSION_2:
415 /* fp->channels is already set in this case */
416 ret = parse_audio_format_rates_v2(chip, fp);
417 break;
418 }
419
420 if (fp->channels < 1) {
421 usb_audio_err(chip,
422 "%u:%d : invalid channels %d\n",
423 fp->iface, fp->altsetting, fp->channels);
424 return -EINVAL;
425 }
426
427 return ret;
428}
429
430/*
431 * parse the format type II descriptor
432 */
433static int parse_audio_format_ii(struct snd_usb_audio *chip,
434 struct audioformat *fp,
435 int format, void *_fmt)
436{
437 int brate, framesize, ret;
438
439 switch (format) {
440 case UAC_FORMAT_TYPE_II_AC3:
441 /* FIXME: there is no AC3 format defined yet */
442 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
443 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
444 break;
445 case UAC_FORMAT_TYPE_II_MPEG:
446 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
447 break;
448 default:
449 usb_audio_info(chip,
450 "%u:%d : unknown format tag %#x is detected. processed as MPEG.\n",
451 fp->iface, fp->altsetting, format);
452 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
453 break;
454 }
455
456 fp->channels = 1;
457
458 switch (fp->protocol) {
459 default:
460 case UAC_VERSION_1: {
461 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
462 brate = le16_to_cpu(fmt->wMaxBitRate);
463 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
464 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
465 fp->frame_size = framesize;
466 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
467 break;
468 }
469 case UAC_VERSION_2: {
470 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
471 brate = le16_to_cpu(fmt->wMaxBitRate);
472 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
473 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
474 fp->frame_size = framesize;
475 ret = parse_audio_format_rates_v2(chip, fp);
476 break;
477 }
478 }
479
480 return ret;
481}
482
483int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
484 struct audioformat *fp, unsigned int format,
485 struct uac_format_type_i_continuous_descriptor *fmt,
486 int stream)
487{
488 int err;
489
490 switch (fmt->bFormatType) {
491 case UAC_FORMAT_TYPE_I:
492 case UAC_FORMAT_TYPE_III:
493 err = parse_audio_format_i(chip, fp, format, fmt);
494 break;
495 case UAC_FORMAT_TYPE_II:
496 err = parse_audio_format_ii(chip, fp, format, fmt);
497 break;
498 default:
499 usb_audio_info(chip,
500 "%u:%d : format type %d is not supported yet\n",
501 fp->iface, fp->altsetting,
502 fmt->bFormatType);
503 return -ENOTSUPP;
504 }
505 fp->fmt_type = fmt->bFormatType;
506 if (err < 0)
507 return err;
508#if 1
509 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
510 /* extigy apparently supports sample rates other than 48k
511 * but not in ordinary way. so we enable only 48k atm.
512 */
513 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
514 chip->usb_id == USB_ID(0x041e, 0x3020) ||
515 chip->usb_id == USB_ID(0x041e, 0x3061)) {
516 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
517 fp->rates != SNDRV_PCM_RATE_48000 &&
518 fp->rates != SNDRV_PCM_RATE_96000)
519 return -ENOTSUPP;
520 }
521#endif
522 return 0;
523}
524