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 */
parse_audio_format_i_type(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)31 static 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
set_fixed_rate(struct audioformat * fp,int rate,int rate_bits)159 static 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 */
set_rate_table_min_max(struct audioformat * fp)174 static 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 */
parse_audio_format_rates_v1(struct snd_usb_audio * chip,struct audioformat * fp,unsigned char * fmt,int offset)200 static 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 */
s1810c_valid_sample_rate(struct audioformat * fp,unsigned int rate)281 static 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 */
focusrite_valid_sample_rate(struct snd_usb_audio * chip,struct audioformat * fp,unsigned int rate)305 static 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 */
parse_uac2_sample_rate_range(struct snd_usb_audio * chip,struct audioformat * fp,int nr_triplets,const unsigned char * data)352 static 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
399 skip_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 */
line6_parse_audio_format_rates_quirk(struct snd_usb_audio * chip,struct audioformat * fp)413 static 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 */
check_valid_altsetting_v2v3(struct snd_usb_audio * chip,int iface,int altsetting)435 static 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 */
validate_sample_rate_table_v2v3(struct snd_usb_audio * chip,struct audioformat * fp,int clock)468 static 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 unsigned int *table;
474 unsigned int nr_rates;
475 int i, err;
476
477 /* performing the rate verification may lead to unexpected USB bus
478 * behavior afterwards by some unknown reason. Do this only for the
479 * known devices.
480 */
481 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES))
482 return 0; /* don't perform the validation as default */
483
484 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
485 if (!table)
486 return -ENOMEM;
487
488 /* clear the interface altsetting at first */
489 usb_set_interface(dev, fp->iface, 0);
490
491 nr_rates = 0;
492 for (i = 0; i < fp->nr_rates; i++) {
493 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
494 fp->rate_table[i]);
495 if (err < 0)
496 continue;
497
498 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))
499 table[nr_rates++] = fp->rate_table[i];
500 }
501
502 if (!nr_rates) {
503 usb_audio_dbg(chip,
504 "No valid sample rate available for %d:%d, assuming a firmware bug\n",
505 fp->iface, fp->altsetting);
506 nr_rates = fp->nr_rates; /* continue as is */
507 }
508
509 if (fp->nr_rates == nr_rates) {
510 kfree(table);
511 return 0;
512 }
513
514 kfree(fp->rate_table);
515 fp->rate_table = table;
516 fp->nr_rates = nr_rates;
517 return 0;
518 }
519
520 /*
521 * parse the format descriptor and stores the possible sample rates
522 * on the audioformat table (audio class v2 and v3).
523 */
parse_audio_format_rates_v2v3(struct snd_usb_audio * chip,struct audioformat * fp)524 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
525 struct audioformat *fp)
526 {
527 struct usb_device *dev = chip->dev;
528 unsigned char tmp[2], *data;
529 int nr_triplets, data_size, ret = 0, ret_l6;
530 int clock = snd_usb_clock_find_source(chip, fp, false);
531
532 if (clock < 0) {
533 dev_err(&dev->dev,
534 "%s(): unable to find clock source (clock %d)\n",
535 __func__, clock);
536 goto err;
537 }
538
539 /* get the number of sample rates first by only fetching 2 bytes */
540 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
541 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
542 UAC2_CS_CONTROL_SAM_FREQ << 8,
543 snd_usb_ctrl_intf(chip) | (clock << 8),
544 tmp, sizeof(tmp));
545
546 if (ret < 0) {
547 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
548 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
549 if (ret_l6 == -ENODEV) {
550 /* no line6 device found continue showing the error */
551 dev_err(&dev->dev,
552 "%s(): unable to retrieve number of sample rates (clock %d)\n",
553 __func__, clock);
554 goto err;
555 }
556 if (ret_l6 == 0) {
557 dev_info(&dev->dev,
558 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
559 __func__, clock);
560 return 0;
561 }
562 ret = ret_l6;
563 goto err;
564 }
565
566 nr_triplets = (tmp[1] << 8) | tmp[0];
567 data_size = 2 + 12 * nr_triplets;
568 data = kzalloc(data_size, GFP_KERNEL);
569 if (!data) {
570 ret = -ENOMEM;
571 goto err;
572 }
573
574 /* now get the full information */
575 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
576 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
577 UAC2_CS_CONTROL_SAM_FREQ << 8,
578 snd_usb_ctrl_intf(chip) | (clock << 8),
579 data, data_size);
580
581 if (ret < 0) {
582 dev_err(&dev->dev,
583 "%s(): unable to retrieve sample rate range (clock %d)\n",
584 __func__, clock);
585 ret = -EINVAL;
586 goto err_free;
587 }
588
589 /* Call the triplet parser, and make sure fp->rate_table is NULL.
590 * We just use the return value to know how many sample rates we
591 * will have to deal with. */
592 kfree(fp->rate_table);
593 fp->rate_table = NULL;
594 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
595
596 if (fp->nr_rates == 0) {
597 /* SNDRV_PCM_RATE_CONTINUOUS */
598 ret = 0;
599 goto err_free;
600 }
601
602 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
603 if (!fp->rate_table) {
604 ret = -ENOMEM;
605 goto err_free;
606 }
607
608 /* Call the triplet parser again, but this time, fp->rate_table is
609 * allocated, so the rates will be stored */
610 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
611
612 ret = validate_sample_rate_table_v2v3(chip, fp, clock);
613 if (ret < 0)
614 goto err_free;
615
616 set_rate_table_min_max(fp);
617
618 err_free:
619 kfree(data);
620 err:
621 return ret;
622 }
623
624 /*
625 * parse the format type I and III descriptors
626 */
parse_audio_format_i(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)627 static int parse_audio_format_i(struct snd_usb_audio *chip,
628 struct audioformat *fp, u64 format,
629 void *_fmt)
630 {
631 snd_pcm_format_t pcm_format;
632 unsigned int fmt_type;
633 int ret;
634
635 switch (fp->protocol) {
636 default:
637 case UAC_VERSION_1:
638 case UAC_VERSION_2: {
639 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
640
641 fmt_type = fmt->bFormatType;
642 break;
643 }
644 case UAC_VERSION_3: {
645 /* fp->fmt_type is already set in this case */
646 fmt_type = fp->fmt_type;
647 break;
648 }
649 }
650
651 if (fmt_type == UAC_FORMAT_TYPE_III) {
652 /* FIXME: the format type is really IECxxx
653 * but we give normal PCM format to get the existing
654 * apps working...
655 */
656 switch (chip->usb_id) {
657
658 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
659 if (chip->setup == 0x00 &&
660 fp->altsetting == 6)
661 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
662 else
663 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
664 break;
665 default:
666 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
667 }
668 fp->formats = pcm_format_to_bits(pcm_format);
669 } else {
670 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
671 if (!fp->formats)
672 return -EINVAL;
673 }
674
675 /* gather possible sample rates */
676 /* audio class v1 reports possible sample rates as part of the
677 * proprietary class specific descriptor.
678 * audio class v2 uses class specific EP0 range requests for that.
679 */
680 switch (fp->protocol) {
681 default:
682 case UAC_VERSION_1: {
683 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
684
685 fp->channels = fmt->bNrChannels;
686 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
687 break;
688 }
689 case UAC_VERSION_2:
690 case UAC_VERSION_3: {
691 /* fp->channels is already set in this case */
692 ret = parse_audio_format_rates_v2v3(chip, fp);
693 break;
694 }
695 }
696
697 if (fp->channels < 1) {
698 usb_audio_err(chip,
699 "%u:%d : invalid channels %d\n",
700 fp->iface, fp->altsetting, fp->channels);
701 return -EINVAL;
702 }
703
704 return ret;
705 }
706
707 /*
708 * parse the format type II descriptor
709 */
parse_audio_format_ii(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)710 static int parse_audio_format_ii(struct snd_usb_audio *chip,
711 struct audioformat *fp,
712 u64 format, void *_fmt)
713 {
714 int brate, framesize, ret;
715
716 switch (format) {
717 case UAC_FORMAT_TYPE_II_AC3:
718 /* FIXME: there is no AC3 format defined yet */
719 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
720 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
721 break;
722 case UAC_FORMAT_TYPE_II_MPEG:
723 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
724 break;
725 default:
726 usb_audio_info(chip,
727 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
728 fp->iface, fp->altsetting, format);
729 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
730 break;
731 }
732
733 fp->channels = 1;
734
735 switch (fp->protocol) {
736 default:
737 case UAC_VERSION_1: {
738 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
739 brate = le16_to_cpu(fmt->wMaxBitRate);
740 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
741 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
742 fp->frame_size = framesize;
743 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
744 break;
745 }
746 case UAC_VERSION_2: {
747 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
748 brate = le16_to_cpu(fmt->wMaxBitRate);
749 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
750 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
751 fp->frame_size = framesize;
752 ret = parse_audio_format_rates_v2v3(chip, fp);
753 break;
754 }
755 }
756
757 return ret;
758 }
759
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)760 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
761 struct audioformat *fp, u64 format,
762 struct uac_format_type_i_continuous_descriptor *fmt,
763 int stream)
764 {
765 int err;
766
767 switch (fmt->bFormatType) {
768 case UAC_FORMAT_TYPE_I:
769 case UAC_FORMAT_TYPE_III:
770 err = parse_audio_format_i(chip, fp, format, fmt);
771 break;
772 case UAC_FORMAT_TYPE_II:
773 err = parse_audio_format_ii(chip, fp, format, fmt);
774 break;
775 default:
776 usb_audio_info(chip,
777 "%u:%d : format type %d is not supported yet\n",
778 fp->iface, fp->altsetting,
779 fmt->bFormatType);
780 return -ENOTSUPP;
781 }
782 fp->fmt_type = fmt->bFormatType;
783 if (err < 0)
784 return err;
785 #if 1
786 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
787 /* extigy apparently supports sample rates other than 48k
788 * but not in ordinary way. so we enable only 48k atm.
789 */
790 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
791 chip->usb_id == USB_ID(0x041e, 0x3020) ||
792 chip->usb_id == USB_ID(0x041e, 0x3061)) {
793 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
794 fp->rates != SNDRV_PCM_RATE_48000 &&
795 fp->rates != SNDRV_PCM_RATE_96000)
796 return -ENOTSUPP;
797 }
798 #endif
799 return 0;
800 }
801
snd_usb_parse_audio_format_v3(struct snd_usb_audio * chip,struct audioformat * fp,struct uac3_as_header_descriptor * as,int stream)802 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
803 struct audioformat *fp,
804 struct uac3_as_header_descriptor *as,
805 int stream)
806 {
807 u64 format = le64_to_cpu(as->bmFormats);
808 int err;
809
810 /*
811 * Type I format bits are D0..D6
812 * This test works because type IV is not supported
813 */
814 if (format & 0x7f)
815 fp->fmt_type = UAC_FORMAT_TYPE_I;
816 else
817 fp->fmt_type = UAC_FORMAT_TYPE_III;
818
819 err = parse_audio_format_i(chip, fp, format, as);
820 if (err < 0)
821 return err;
822
823 return 0;
824 }
825