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