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