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 return 0; /* invalid format */
44 sample_width = fmt->bBitResolution;
45 sample_bytes = fmt->bSubframeSize;
46 format = 1ULL << format;
47 break;
48 }
49
50 case UAC_VERSION_2: {
51 struct uac_format_type_i_ext_descriptor *fmt = _fmt;
52 sample_width = fmt->bBitResolution;
53 sample_bytes = fmt->bSubslotSize;
54
55 if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) {
56 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
57 /* flag potentially raw DSD capable altsettings */
58 fp->dsd_raw = true;
59 }
60
61 format <<= 1;
62 break;
63 }
64 case UAC_VERSION_3: {
65 struct uac3_as_header_descriptor *as = _fmt;
66
67 sample_width = as->bBitResolution;
68 sample_bytes = as->bSubslotSize;
69
70 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA)
71 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
72
73 format <<= 1;
74 break;
75 }
76 }
77
78 fp->fmt_bits = sample_width;
79
80 if ((pcm_formats == 0) &&
81 (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
82 /* some devices don't define this correctly... */
83 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
84 fp->iface, fp->altsetting);
85 format = 1 << UAC_FORMAT_TYPE_I_PCM;
86 }
87 if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
88 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
89 /* Edirol SD-90 */
90 (chip->usb_id == USB_ID(0x0582, 0x000c))) &&
91 /* Roland SC-D70 */
92 sample_width == 24 && sample_bytes == 2)
93 sample_bytes = 3;
94 else if (sample_width > sample_bytes * 8) {
95 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
96 fp->iface, fp->altsetting,
97 sample_width, sample_bytes);
98 }
99 /* check the format byte size */
100 switch (sample_bytes) {
101 case 1:
102 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
103 break;
104 case 2:
105 if (snd_usb_is_big_endian_format(chip, fp))
106 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
107 else
108 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
109 break;
110 case 3:
111 if (snd_usb_is_big_endian_format(chip, fp))
112 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
113 else
114 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
115 break;
116 case 4:
117 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
118 break;
119 default:
120 usb_audio_info(chip,
121 "%u:%d : unsupported sample bitwidth %d in %d bytes\n",
122 fp->iface, fp->altsetting,
123 sample_width, sample_bytes);
124 break;
125 }
126 }
127 if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
128 /* Dallas DS4201 workaround: it advertises U8 format, but really
129 supports S8. */
130 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
131 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
132 else
133 pcm_formats |= SNDRV_PCM_FMTBIT_U8;
134 }
135 if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
136 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
137 }
138 if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
139 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
140 }
141 if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
142 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
143 }
144 if (format & ~0x3f) {
145 usb_audio_info(chip,
146 "%u:%d : unsupported format bits %#llx\n",
147 fp->iface, fp->altsetting, format);
148 }
149
150 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
151
152 return pcm_formats;
153 }
154
set_fixed_rate(struct audioformat * fp,int rate,int rate_bits)155 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
156 {
157 kfree(fp->rate_table);
158 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
159 if (!fp->rate_table)
160 return -ENOMEM;
161 fp->nr_rates = 1;
162 fp->rate_min = rate;
163 fp->rate_max = rate;
164 fp->rates = rate_bits;
165 fp->rate_table[0] = rate;
166 return 0;
167 }
168
169 /* set up rate_min, rate_max and rates from the rate table */
set_rate_table_min_max(struct audioformat * fp)170 static void set_rate_table_min_max(struct audioformat *fp)
171 {
172 unsigned int rate;
173 int i;
174
175 fp->rate_min = INT_MAX;
176 fp->rate_max = 0;
177 fp->rates = 0;
178 for (i = 0; i < fp->nr_rates; i++) {
179 rate = fp->rate_table[i];
180 fp->rate_min = min(fp->rate_min, rate);
181 fp->rate_max = max(fp->rate_max, rate);
182 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
183 }
184 }
185
186 /*
187 * parse the format descriptor and stores the possible sample rates
188 * on the audioformat table (audio class v1).
189 *
190 * @dev: usb device
191 * @fp: audioformat record
192 * @fmt: the format descriptor
193 * @offset: the start offset of descriptor pointing the rate type
194 * (7 for type I and II, 8 for type II)
195 */
parse_audio_format_rates_v1(struct snd_usb_audio * chip,struct audioformat * fp,unsigned char * fmt,int offset)196 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
197 unsigned char *fmt, int offset)
198 {
199 int nr_rates = fmt[offset];
200
201 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
202 usb_audio_err(chip,
203 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
204 fp->iface, fp->altsetting);
205 return -EINVAL;
206 }
207
208 if (nr_rates) {
209 /*
210 * build the rate table and bitmap flags
211 */
212 int r, idx;
213
214 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
215 GFP_KERNEL);
216 if (fp->rate_table == NULL)
217 return -ENOMEM;
218
219 fp->nr_rates = 0;
220 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
221 unsigned int rate = combine_triple(&fmt[idx]);
222 if (!rate)
223 continue;
224 /* C-Media CM6501 mislabels its 96 kHz altsetting */
225 /* Terratec Aureon 7.1 USB C-Media 6206, too */
226 /* Ozone Z90 USB C-Media, too */
227 if (rate == 48000 && nr_rates == 1 &&
228 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
229 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
230 chip->usb_id == USB_ID(0x0d8c, 0x0078) ||
231 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
232 fp->altsetting == 5 && fp->maxpacksize == 392)
233 rate = 96000;
234 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
235 if (rate == 16000 &&
236 (chip->usb_id == USB_ID(0x041e, 0x4064) ||
237 chip->usb_id == USB_ID(0x041e, 0x4068)))
238 rate = 8000;
239
240 fp->rate_table[fp->nr_rates++] = rate;
241 }
242 if (!fp->nr_rates) {
243 usb_audio_info(chip,
244 "%u:%d: All rates were zero\n",
245 fp->iface, fp->altsetting);
246 return -EINVAL;
247 }
248 set_rate_table_min_max(fp);
249 } else {
250 /* continuous rates */
251 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
252 fp->rate_min = combine_triple(&fmt[offset + 1]);
253 fp->rate_max = combine_triple(&fmt[offset + 4]);
254 }
255
256 /* Jabra Evolve 65 headset */
257 if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) {
258 /* only 48kHz for playback while keeping 16kHz for capture */
259 if (fp->nr_rates != 1)
260 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
261 }
262
263 return 0;
264 }
265
266
267 /*
268 * Presonus Studio 1810c supports a limited set of sampling
269 * rates per altsetting but reports the full set each time.
270 * If we don't filter out the unsupported rates and attempt
271 * to configure the card, it will hang refusing to do any
272 * further audio I/O until a hard reset is performed.
273 *
274 * The list of supported rates per altsetting (set of available
275 * I/O channels) is described in the owner's manual, section 2.2.
276 */
s1810c_valid_sample_rate(struct audioformat * fp,unsigned int rate)277 static bool s1810c_valid_sample_rate(struct audioformat *fp,
278 unsigned int rate)
279 {
280 switch (fp->altsetting) {
281 case 1:
282 /* All ADAT ports available */
283 return rate <= 48000;
284 case 2:
285 /* Half of ADAT ports available */
286 return (rate == 88200 || rate == 96000);
287 case 3:
288 /* Analog I/O only (no S/PDIF nor ADAT) */
289 return rate >= 176400;
290 default:
291 return false;
292 }
293 return false;
294 }
295
296 /*
297 * Many Focusrite devices supports a limited set of sampling rates per
298 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
299 * descriptor which has a non-standard bLength = 10.
300 */
focusrite_valid_sample_rate(struct snd_usb_audio * chip,struct audioformat * fp,unsigned int rate)301 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
302 struct audioformat *fp,
303 unsigned int rate)
304 {
305 struct usb_interface *iface;
306 struct usb_host_interface *alts;
307 unsigned char *fmt;
308 unsigned int max_rate;
309
310 iface = usb_ifnum_to_if(chip->dev, fp->iface);
311 if (!iface)
312 return true;
313
314 alts = &iface->altsetting[fp->altset_idx];
315 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
316 NULL, UAC_FORMAT_TYPE);
317 if (!fmt)
318 return true;
319
320 if (fmt[0] == 10) { /* bLength */
321 max_rate = combine_quad(&fmt[6]);
322
323 /* Validate max rate */
324 if (max_rate != 48000 &&
325 max_rate != 96000 &&
326 max_rate != 192000 &&
327 max_rate != 384000) {
328
329 usb_audio_info(chip,
330 "%u:%d : unexpected max rate: %u\n",
331 fp->iface, fp->altsetting, max_rate);
332
333 return true;
334 }
335
336 return rate <= max_rate;
337 }
338
339 return true;
340 }
341
342 /*
343 * Helper function to walk the array of sample rate triplets reported by
344 * the device. The problem is that we need to parse whole array first to
345 * get to know how many sample rates we have to expect.
346 * Then fp->rate_table can be allocated and filled.
347 */
parse_uac2_sample_rate_range(struct snd_usb_audio * chip,struct audioformat * fp,int nr_triplets,const unsigned char * data)348 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
349 struct audioformat *fp, int nr_triplets,
350 const unsigned char *data)
351 {
352 int i, nr_rates = 0;
353
354 for (i = 0; i < nr_triplets; i++) {
355 int min = combine_quad(&data[2 + 12 * i]);
356 int max = combine_quad(&data[6 + 12 * i]);
357 int res = combine_quad(&data[10 + 12 * i]);
358 unsigned int rate;
359
360 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
361 continue;
362
363 /*
364 * for ranges with res == 1, we announce a continuous sample
365 * rate range, and this function should return 0 for no further
366 * parsing.
367 */
368 if (res == 1) {
369 fp->rate_min = min;
370 fp->rate_max = max;
371 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
372 return 0;
373 }
374
375 for (rate = min; rate <= max; rate += res) {
376
377 /* Filter out invalid rates on Presonus Studio 1810c */
378 if (chip->usb_id == USB_ID(0x0194f, 0x010c) &&
379 !s1810c_valid_sample_rate(fp, rate))
380 goto skip_rate;
381
382 /* Filter out invalid rates on Focusrite devices */
383 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
384 !focusrite_valid_sample_rate(chip, fp, rate))
385 goto skip_rate;
386
387 if (fp->rate_table)
388 fp->rate_table[nr_rates] = rate;
389 nr_rates++;
390 if (nr_rates >= MAX_NR_RATES) {
391 usb_audio_err(chip, "invalid uac2 rates\n");
392 break;
393 }
394
395 skip_rate:
396 /* avoid endless loop */
397 if (res == 0)
398 break;
399 }
400 }
401
402 return nr_rates;
403 }
404
405 /* Line6 Helix series and the Rode Rodecaster Pro don't support the
406 * UAC2_CS_RANGE usb function call. Return a static table of known
407 * clock rates.
408 */
line6_parse_audio_format_rates_quirk(struct snd_usb_audio * chip,struct audioformat * fp)409 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
410 struct audioformat *fp)
411 {
412 switch (chip->usb_id) {
413 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
414 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
415 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
416 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
417 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
418 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
419 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
420 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
421 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
422 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
423 }
424
425 return -ENODEV;
426 }
427
428 /* 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)429 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,
430 int altsetting)
431 {
432 struct usb_device *dev = chip->dev;
433 __le64 raw_data = 0;
434 u64 data;
435 int err;
436
437 /* we assume 64bit is enough for any altsettings */
438 if (snd_BUG_ON(altsetting >= 64 - 8))
439 return false;
440
441 err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
442 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
443 UAC2_AS_VAL_ALT_SETTINGS << 8,
444 iface, &raw_data, sizeof(raw_data));
445 if (err < 0)
446 return false;
447
448 data = le64_to_cpu(raw_data);
449 /* first byte contains the bitmap size */
450 if ((data & 0xff) * 8 < altsetting)
451 return false;
452 if (data & (1ULL << (altsetting + 8)))
453 return true;
454
455 return false;
456 }
457
458 /*
459 * Validate each sample rate with the altsetting
460 * Rebuild the rate table if only partial values are valid
461 */
validate_sample_rate_table_v2v3(struct snd_usb_audio * chip,struct audioformat * fp,int clock)462 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,
463 struct audioformat *fp,
464 int clock)
465 {
466 struct usb_device *dev = chip->dev;
467 unsigned int *table;
468 unsigned int nr_rates;
469 int i, err;
470
471 /* performing the rate verification may lead to unexpected USB bus
472 * behavior afterwards by some unknown reason. Do this only for the
473 * known devices.
474 */
475 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES))
476 return 0; /* don't perform the validation as default */
477
478 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
479 if (!table)
480 return -ENOMEM;
481
482 /* clear the interface altsetting at first */
483 usb_set_interface(dev, fp->iface, 0);
484
485 nr_rates = 0;
486 for (i = 0; i < fp->nr_rates; i++) {
487 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
488 fp->rate_table[i]);
489 if (err < 0)
490 continue;
491
492 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))
493 table[nr_rates++] = fp->rate_table[i];
494 }
495
496 if (!nr_rates) {
497 usb_audio_dbg(chip,
498 "No valid sample rate available for %d:%d, assuming a firmware bug\n",
499 fp->iface, fp->altsetting);
500 nr_rates = fp->nr_rates; /* continue as is */
501 }
502
503 if (fp->nr_rates == nr_rates) {
504 kfree(table);
505 return 0;
506 }
507
508 kfree(fp->rate_table);
509 fp->rate_table = table;
510 fp->nr_rates = nr_rates;
511 return 0;
512 }
513
514 /*
515 * parse the format descriptor and stores the possible sample rates
516 * on the audioformat table (audio class v2 and v3).
517 */
parse_audio_format_rates_v2v3(struct snd_usb_audio * chip,struct audioformat * fp)518 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
519 struct audioformat *fp)
520 {
521 struct usb_device *dev = chip->dev;
522 unsigned char tmp[2], *data;
523 int nr_triplets, data_size, ret = 0, ret_l6;
524 int clock = snd_usb_clock_find_source(chip, fp, false);
525
526 if (clock < 0) {
527 dev_err(&dev->dev,
528 "%s(): unable to find clock source (clock %d)\n",
529 __func__, clock);
530 goto err;
531 }
532
533 /* get the number of sample rates first by only fetching 2 bytes */
534 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
535 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
536 UAC2_CS_CONTROL_SAM_FREQ << 8,
537 snd_usb_ctrl_intf(chip) | (clock << 8),
538 tmp, sizeof(tmp));
539
540 if (ret < 0) {
541 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
542 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
543 if (ret_l6 == -ENODEV) {
544 /* no line6 device found continue showing the error */
545 dev_err(&dev->dev,
546 "%s(): unable to retrieve number of sample rates (clock %d)\n",
547 __func__, clock);
548 goto err;
549 }
550 if (ret_l6 == 0) {
551 dev_info(&dev->dev,
552 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
553 __func__, clock);
554 return 0;
555 }
556 ret = ret_l6;
557 goto err;
558 }
559
560 nr_triplets = (tmp[1] << 8) | tmp[0];
561 data_size = 2 + 12 * nr_triplets;
562 data = kzalloc(data_size, GFP_KERNEL);
563 if (!data) {
564 ret = -ENOMEM;
565 goto err;
566 }
567
568 /* now get the full information */
569 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
570 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
571 UAC2_CS_CONTROL_SAM_FREQ << 8,
572 snd_usb_ctrl_intf(chip) | (clock << 8),
573 data, data_size);
574
575 if (ret < 0) {
576 dev_err(&dev->dev,
577 "%s(): unable to retrieve sample rate range (clock %d)\n",
578 __func__, clock);
579 ret = -EINVAL;
580 goto err_free;
581 }
582
583 /* Call the triplet parser, and make sure fp->rate_table is NULL.
584 * We just use the return value to know how many sample rates we
585 * will have to deal with. */
586 kfree(fp->rate_table);
587 fp->rate_table = NULL;
588 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
589
590 if (fp->nr_rates == 0) {
591 /* SNDRV_PCM_RATE_CONTINUOUS */
592 ret = 0;
593 goto err_free;
594 }
595
596 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
597 if (!fp->rate_table) {
598 ret = -ENOMEM;
599 goto err_free;
600 }
601
602 /* Call the triplet parser again, but this time, fp->rate_table is
603 * allocated, so the rates will be stored */
604 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
605
606 ret = validate_sample_rate_table_v2v3(chip, fp, clock);
607 if (ret < 0)
608 goto err_free;
609
610 set_rate_table_min_max(fp);
611
612 err_free:
613 kfree(data);
614 err:
615 return ret;
616 }
617
618 /*
619 * parse the format type I and III descriptors
620 */
parse_audio_format_i(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)621 static int parse_audio_format_i(struct snd_usb_audio *chip,
622 struct audioformat *fp, u64 format,
623 void *_fmt)
624 {
625 snd_pcm_format_t pcm_format;
626 unsigned int fmt_type;
627 int ret;
628
629 switch (fp->protocol) {
630 default:
631 case UAC_VERSION_1:
632 case UAC_VERSION_2: {
633 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
634
635 fmt_type = fmt->bFormatType;
636 break;
637 }
638 case UAC_VERSION_3: {
639 /* fp->fmt_type is already set in this case */
640 fmt_type = fp->fmt_type;
641 break;
642 }
643 }
644
645 if (fmt_type == UAC_FORMAT_TYPE_III) {
646 /* FIXME: the format type is really IECxxx
647 * but we give normal PCM format to get the existing
648 * apps working...
649 */
650 switch (chip->usb_id) {
651
652 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
653 if (chip->setup == 0x00 &&
654 fp->altsetting == 6)
655 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
656 else
657 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
658 break;
659 default:
660 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
661 }
662 fp->formats = pcm_format_to_bits(pcm_format);
663 } else {
664 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
665 if (!fp->formats)
666 return -EINVAL;
667 }
668
669 /* gather possible sample rates */
670 /* audio class v1 reports possible sample rates as part of the
671 * proprietary class specific descriptor.
672 * audio class v2 uses class specific EP0 range requests for that.
673 */
674 switch (fp->protocol) {
675 default:
676 case UAC_VERSION_1: {
677 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
678
679 fp->channels = fmt->bNrChannels;
680 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
681 break;
682 }
683 case UAC_VERSION_2:
684 case UAC_VERSION_3: {
685 /* fp->channels is already set in this case */
686 ret = parse_audio_format_rates_v2v3(chip, fp);
687 break;
688 }
689 }
690
691 if (fp->channels < 1) {
692 usb_audio_err(chip,
693 "%u:%d : invalid channels %d\n",
694 fp->iface, fp->altsetting, fp->channels);
695 return -EINVAL;
696 }
697
698 return ret;
699 }
700
701 /*
702 * parse the format type II descriptor
703 */
parse_audio_format_ii(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)704 static int parse_audio_format_ii(struct snd_usb_audio *chip,
705 struct audioformat *fp,
706 u64 format, void *_fmt)
707 {
708 int brate, framesize, ret;
709
710 switch (format) {
711 case UAC_FORMAT_TYPE_II_AC3:
712 /* FIXME: there is no AC3 format defined yet */
713 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
714 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
715 break;
716 case UAC_FORMAT_TYPE_II_MPEG:
717 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
718 break;
719 default:
720 usb_audio_info(chip,
721 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
722 fp->iface, fp->altsetting, format);
723 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
724 break;
725 }
726
727 fp->channels = 1;
728
729 switch (fp->protocol) {
730 default:
731 case UAC_VERSION_1: {
732 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
733 brate = le16_to_cpu(fmt->wMaxBitRate);
734 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
735 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
736 fp->frame_size = framesize;
737 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
738 break;
739 }
740 case UAC_VERSION_2: {
741 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
742 brate = le16_to_cpu(fmt->wMaxBitRate);
743 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
744 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
745 fp->frame_size = framesize;
746 ret = parse_audio_format_rates_v2v3(chip, fp);
747 break;
748 }
749 }
750
751 return ret;
752 }
753
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)754 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
755 struct audioformat *fp, u64 format,
756 struct uac_format_type_i_continuous_descriptor *fmt,
757 int stream)
758 {
759 int err;
760
761 switch (fmt->bFormatType) {
762 case UAC_FORMAT_TYPE_I:
763 case UAC_FORMAT_TYPE_III:
764 err = parse_audio_format_i(chip, fp, format, fmt);
765 break;
766 case UAC_FORMAT_TYPE_II:
767 err = parse_audio_format_ii(chip, fp, format, fmt);
768 break;
769 default:
770 usb_audio_info(chip,
771 "%u:%d : format type %d is not supported yet\n",
772 fp->iface, fp->altsetting,
773 fmt->bFormatType);
774 return -ENOTSUPP;
775 }
776 fp->fmt_type = fmt->bFormatType;
777 if (err < 0)
778 return err;
779 #if 1
780 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
781 /* extigy apparently supports sample rates other than 48k
782 * but not in ordinary way. so we enable only 48k atm.
783 */
784 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
785 chip->usb_id == USB_ID(0x041e, 0x3020) ||
786 chip->usb_id == USB_ID(0x041e, 0x3061)) {
787 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
788 fp->rates != SNDRV_PCM_RATE_48000 &&
789 fp->rates != SNDRV_PCM_RATE_96000)
790 return -ENOTSUPP;
791 }
792 #endif
793 return 0;
794 }
795
snd_usb_parse_audio_format_v3(struct snd_usb_audio * chip,struct audioformat * fp,struct uac3_as_header_descriptor * as,int stream)796 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
797 struct audioformat *fp,
798 struct uac3_as_header_descriptor *as,
799 int stream)
800 {
801 u64 format = le64_to_cpu(as->bmFormats);
802 int err;
803
804 /*
805 * Type I format bits are D0..D6
806 * This test works because type IV is not supported
807 */
808 if (format & 0x7f)
809 fp->fmt_type = UAC_FORMAT_TYPE_I;
810 else
811 fp->fmt_type = UAC_FORMAT_TYPE_III;
812
813 err = parse_audio_format_i(chip, fp, format, as);
814 if (err < 0)
815 return err;
816
817 return 0;
818 }
819
