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 if (rate == 48000 && nr_rates == 1 &&
227 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
228 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
229 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
230 fp->altsetting == 5 && fp->maxpacksize == 392)
231 rate = 96000;
232 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
233 if (rate == 16000 &&
234 (chip->usb_id == USB_ID(0x041e, 0x4064) ||
235 chip->usb_id == USB_ID(0x041e, 0x4068)))
236 rate = 8000;
237
238 fp->rate_table[fp->nr_rates++] = rate;
239 }
240 if (!fp->nr_rates) {
241 usb_audio_info(chip,
242 "%u:%d: All rates were zero\n",
243 fp->iface, fp->altsetting);
244 return -EINVAL;
245 }
246 set_rate_table_min_max(fp);
247 } else {
248 /* continuous rates */
249 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
250 fp->rate_min = combine_triple(&fmt[offset + 1]);
251 fp->rate_max = combine_triple(&fmt[offset + 4]);
252 }
253
254 /* Jabra Evolve 65 headset */
255 if (chip->usb_id == USB_ID(0x0b0e, 0x030b)) {
256 /* only 48kHz for playback while keeping 16kHz for capture */
257 if (fp->nr_rates != 1)
258 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
259 }
260
261 return 0;
262 }
263
264
265 /*
266 * Presonus Studio 1810c supports a limited set of sampling
267 * rates per altsetting but reports the full set each time.
268 * If we don't filter out the unsupported rates and attempt
269 * to configure the card, it will hang refusing to do any
270 * further audio I/O until a hard reset is performed.
271 *
272 * The list of supported rates per altsetting (set of available
273 * I/O channels) is described in the owner's manual, section 2.2.
274 */
s1810c_valid_sample_rate(struct audioformat * fp,unsigned int rate)275 static bool s1810c_valid_sample_rate(struct audioformat *fp,
276 unsigned int rate)
277 {
278 switch (fp->altsetting) {
279 case 1:
280 /* All ADAT ports available */
281 return rate <= 48000;
282 case 2:
283 /* Half of ADAT ports available */
284 return (rate == 88200 || rate == 96000);
285 case 3:
286 /* Analog I/O only (no S/PDIF nor ADAT) */
287 return rate >= 176400;
288 default:
289 return false;
290 }
291 return false;
292 }
293
294 /*
295 * Many Focusrite devices supports a limited set of sampling rates per
296 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
297 * descriptor which has a non-standard bLength = 10.
298 */
focusrite_valid_sample_rate(struct snd_usb_audio * chip,struct audioformat * fp,unsigned int rate)299 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
300 struct audioformat *fp,
301 unsigned int rate)
302 {
303 struct usb_interface *iface;
304 struct usb_host_interface *alts;
305 unsigned char *fmt;
306 unsigned int max_rate;
307
308 iface = usb_ifnum_to_if(chip->dev, fp->iface);
309 if (!iface)
310 return true;
311
312 alts = &iface->altsetting[fp->altset_idx];
313 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
314 NULL, UAC_FORMAT_TYPE);
315 if (!fmt)
316 return true;
317
318 if (fmt[0] == 10) { /* bLength */
319 max_rate = combine_quad(&fmt[6]);
320
321 /* Validate max rate */
322 if (max_rate != 48000 &&
323 max_rate != 96000 &&
324 max_rate != 192000 &&
325 max_rate != 384000) {
326
327 usb_audio_info(chip,
328 "%u:%d : unexpected max rate: %u\n",
329 fp->iface, fp->altsetting, max_rate);
330
331 return true;
332 }
333
334 return rate <= max_rate;
335 }
336
337 return true;
338 }
339
340 /*
341 * Helper function to walk the array of sample rate triplets reported by
342 * the device. The problem is that we need to parse whole array first to
343 * get to know how many sample rates we have to expect.
344 * Then fp->rate_table can be allocated and filled.
345 */
parse_uac2_sample_rate_range(struct snd_usb_audio * chip,struct audioformat * fp,int nr_triplets,const unsigned char * data)346 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
347 struct audioformat *fp, int nr_triplets,
348 const unsigned char *data)
349 {
350 int i, nr_rates = 0;
351
352 for (i = 0; i < nr_triplets; i++) {
353 int min = combine_quad(&data[2 + 12 * i]);
354 int max = combine_quad(&data[6 + 12 * i]);
355 int res = combine_quad(&data[10 + 12 * i]);
356 unsigned int rate;
357
358 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
359 continue;
360
361 /*
362 * for ranges with res == 1, we announce a continuous sample
363 * rate range, and this function should return 0 for no further
364 * parsing.
365 */
366 if (res == 1) {
367 fp->rate_min = min;
368 fp->rate_max = max;
369 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
370 return 0;
371 }
372
373 for (rate = min; rate <= max; rate += res) {
374
375 /* Filter out invalid rates on Presonus Studio 1810c */
376 if (chip->usb_id == USB_ID(0x0194f, 0x010c) &&
377 !s1810c_valid_sample_rate(fp, rate))
378 goto skip_rate;
379
380 /* Filter out invalid rates on Focusrite devices */
381 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
382 !focusrite_valid_sample_rate(chip, fp, rate))
383 goto skip_rate;
384
385 if (fp->rate_table)
386 fp->rate_table[nr_rates] = rate;
387 nr_rates++;
388 if (nr_rates >= MAX_NR_RATES) {
389 usb_audio_err(chip, "invalid uac2 rates\n");
390 break;
391 }
392
393 skip_rate:
394 /* avoid endless loop */
395 if (res == 0)
396 break;
397 }
398 }
399
400 return nr_rates;
401 }
402
403 /* Line6 Helix series and the Rode Rodecaster Pro don't support the
404 * UAC2_CS_RANGE usb function call. Return a static table of known
405 * clock rates.
406 */
line6_parse_audio_format_rates_quirk(struct snd_usb_audio * chip,struct audioformat * fp)407 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
408 struct audioformat *fp)
409 {
410 switch (chip->usb_id) {
411 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
412 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
413 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
414 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
415 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
416 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
417 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
418 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
419 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
420 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
421 }
422
423 return -ENODEV;
424 }
425
426 /* 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)427 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,
428 int altsetting)
429 {
430 struct usb_device *dev = chip->dev;
431 __le64 raw_data = 0;
432 u64 data;
433 int err;
434
435 /* we assume 64bit is enough for any altsettings */
436 if (snd_BUG_ON(altsetting >= 64 - 8))
437 return false;
438
439 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
440 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
441 UAC2_AS_VAL_ALT_SETTINGS << 8,
442 iface, &raw_data, sizeof(raw_data));
443 if (err < 0)
444 return false;
445
446 data = le64_to_cpu(raw_data);
447 /* first byte contains the bitmap size */
448 if ((data & 0xff) * 8 < altsetting)
449 return false;
450 if (data & (1ULL << (altsetting + 8)))
451 return true;
452
453 return false;
454 }
455
456 /*
457 * Validate each sample rate with the altsetting
458 * Rebuild the rate table if only partial values are valid
459 */
validate_sample_rate_table_v2v3(struct snd_usb_audio * chip,struct audioformat * fp,int clock)460 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,
461 struct audioformat *fp,
462 int clock)
463 {
464 struct usb_device *dev = chip->dev;
465 unsigned int *table;
466 unsigned int nr_rates;
467 int i, err;
468
469 /* performing the rate verification may lead to unexpected USB bus
470 * behavior afterwards by some unknown reason. Do this only for the
471 * known devices.
472 */
473 switch (USB_ID_VENDOR(chip->usb_id)) {
474 case 0x07fd: /* MOTU */
475 break;
476 default:
477 return 0; /* don't perform the validation as default */
478 }
479
480 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
481 if (!table)
482 return -ENOMEM;
483
484 /* clear the interface altsetting at first */
485 usb_set_interface(dev, fp->iface, 0);
486
487 nr_rates = 0;
488 for (i = 0; i < fp->nr_rates; i++) {
489 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
490 fp->rate_table[i]);
491 if (err < 0)
492 continue;
493
494 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))
495 table[nr_rates++] = fp->rate_table[i];
496 }
497
498 if (!nr_rates) {
499 usb_audio_dbg(chip,
500 "No valid sample rate available for %d:%d, assuming a firmware bug\n",
501 fp->iface, fp->altsetting);
502 nr_rates = fp->nr_rates; /* continue as is */
503 }
504
505 if (fp->nr_rates == nr_rates) {
506 kfree(table);
507 return 0;
508 }
509
510 kfree(fp->rate_table);
511 fp->rate_table = table;
512 fp->nr_rates = nr_rates;
513 return 0;
514 }
515
516 /*
517 * parse the format descriptor and stores the possible sample rates
518 * on the audioformat table (audio class v2 and v3).
519 */
parse_audio_format_rates_v2v3(struct snd_usb_audio * chip,struct audioformat * fp)520 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
521 struct audioformat *fp)
522 {
523 struct usb_device *dev = chip->dev;
524 unsigned char tmp[2], *data;
525 int nr_triplets, data_size, ret = 0, ret_l6;
526 int clock = snd_usb_clock_find_source(chip, fp, false);
527
528 if (clock < 0) {
529 dev_err(&dev->dev,
530 "%s(): unable to find clock source (clock %d)\n",
531 __func__, clock);
532 goto err;
533 }
534
535 /* get the number of sample rates first by only fetching 2 bytes */
536 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
537 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
538 UAC2_CS_CONTROL_SAM_FREQ << 8,
539 snd_usb_ctrl_intf(chip) | (clock << 8),
540 tmp, sizeof(tmp));
541
542 if (ret < 0) {
543 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
544 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
545 if (ret_l6 == -ENODEV) {
546 /* no line6 device found continue showing the error */
547 dev_err(&dev->dev,
548 "%s(): unable to retrieve number of sample rates (clock %d)\n",
549 __func__, clock);
550 goto err;
551 }
552 if (ret_l6 == 0) {
553 dev_info(&dev->dev,
554 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
555 __func__, clock);
556 return 0;
557 }
558 ret = ret_l6;
559 goto err;
560 }
561
562 nr_triplets = (tmp[1] << 8) | tmp[0];
563 data_size = 2 + 12 * nr_triplets;
564 data = kzalloc(data_size, GFP_KERNEL);
565 if (!data) {
566 ret = -ENOMEM;
567 goto err;
568 }
569
570 /* now get the full information */
571 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
572 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
573 UAC2_CS_CONTROL_SAM_FREQ << 8,
574 snd_usb_ctrl_intf(chip) | (clock << 8),
575 data, data_size);
576
577 if (ret < 0) {
578 dev_err(&dev->dev,
579 "%s(): unable to retrieve sample rate range (clock %d)\n",
580 __func__, clock);
581 ret = -EINVAL;
582 goto err_free;
583 }
584
585 /* Call the triplet parser, and make sure fp->rate_table is NULL.
586 * We just use the return value to know how many sample rates we
587 * will have to deal with. */
588 kfree(fp->rate_table);
589 fp->rate_table = NULL;
590 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
591
592 if (fp->nr_rates == 0) {
593 /* SNDRV_PCM_RATE_CONTINUOUS */
594 ret = 0;
595 goto err_free;
596 }
597
598 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
599 if (!fp->rate_table) {
600 ret = -ENOMEM;
601 goto err_free;
602 }
603
604 /* Call the triplet parser again, but this time, fp->rate_table is
605 * allocated, so the rates will be stored */
606 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
607
608 ret = validate_sample_rate_table_v2v3(chip, fp, clock);
609 if (ret < 0)
610 goto err_free;
611
612 set_rate_table_min_max(fp);
613
614 err_free:
615 kfree(data);
616 err:
617 return ret;
618 }
619
620 /*
621 * parse the format type I and III descriptors
622 */
parse_audio_format_i(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)623 static int parse_audio_format_i(struct snd_usb_audio *chip,
624 struct audioformat *fp, u64 format,
625 void *_fmt)
626 {
627 snd_pcm_format_t pcm_format;
628 unsigned int fmt_type;
629 int ret;
630
631 switch (fp->protocol) {
632 default:
633 case UAC_VERSION_1:
634 case UAC_VERSION_2: {
635 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
636
637 fmt_type = fmt->bFormatType;
638 break;
639 }
640 case UAC_VERSION_3: {
641 /* fp->fmt_type is already set in this case */
642 fmt_type = fp->fmt_type;
643 break;
644 }
645 }
646
647 if (fmt_type == UAC_FORMAT_TYPE_III) {
648 /* FIXME: the format type is really IECxxx
649 * but we give normal PCM format to get the existing
650 * apps working...
651 */
652 switch (chip->usb_id) {
653
654 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
655 if (chip->setup == 0x00 &&
656 fp->altsetting == 6)
657 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
658 else
659 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
660 break;
661 default:
662 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
663 }
664 fp->formats = pcm_format_to_bits(pcm_format);
665 } else {
666 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
667 if (!fp->formats)
668 return -EINVAL;
669 }
670
671 /* gather possible sample rates */
672 /* audio class v1 reports possible sample rates as part of the
673 * proprietary class specific descriptor.
674 * audio class v2 uses class specific EP0 range requests for that.
675 */
676 switch (fp->protocol) {
677 default:
678 case UAC_VERSION_1: {
679 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
680
681 fp->channels = fmt->bNrChannels;
682 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
683 break;
684 }
685 case UAC_VERSION_2:
686 case UAC_VERSION_3: {
687 /* fp->channels is already set in this case */
688 ret = parse_audio_format_rates_v2v3(chip, fp);
689 break;
690 }
691 }
692
693 if (fp->channels < 1) {
694 usb_audio_err(chip,
695 "%u:%d : invalid channels %d\n",
696 fp->iface, fp->altsetting, fp->channels);
697 return -EINVAL;
698 }
699
700 return ret;
701 }
702
703 /*
704 * parse the format type II descriptor
705 */
parse_audio_format_ii(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)706 static int parse_audio_format_ii(struct snd_usb_audio *chip,
707 struct audioformat *fp,
708 u64 format, void *_fmt)
709 {
710 int brate, framesize, ret;
711
712 switch (format) {
713 case UAC_FORMAT_TYPE_II_AC3:
714 /* FIXME: there is no AC3 format defined yet */
715 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
716 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
717 break;
718 case UAC_FORMAT_TYPE_II_MPEG:
719 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
720 break;
721 default:
722 usb_audio_info(chip,
723 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
724 fp->iface, fp->altsetting, format);
725 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
726 break;
727 }
728
729 fp->channels = 1;
730
731 switch (fp->protocol) {
732 default:
733 case UAC_VERSION_1: {
734 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
735 brate = le16_to_cpu(fmt->wMaxBitRate);
736 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
737 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
738 fp->frame_size = framesize;
739 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
740 break;
741 }
742 case UAC_VERSION_2: {
743 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
744 brate = le16_to_cpu(fmt->wMaxBitRate);
745 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
746 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
747 fp->frame_size = framesize;
748 ret = parse_audio_format_rates_v2v3(chip, fp);
749 break;
750 }
751 }
752
753 return ret;
754 }
755
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)756 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
757 struct audioformat *fp, u64 format,
758 struct uac_format_type_i_continuous_descriptor *fmt,
759 int stream)
760 {
761 int err;
762
763 switch (fmt->bFormatType) {
764 case UAC_FORMAT_TYPE_I:
765 case UAC_FORMAT_TYPE_III:
766 err = parse_audio_format_i(chip, fp, format, fmt);
767 break;
768 case UAC_FORMAT_TYPE_II:
769 err = parse_audio_format_ii(chip, fp, format, fmt);
770 break;
771 default:
772 usb_audio_info(chip,
773 "%u:%d : format type %d is not supported yet\n",
774 fp->iface, fp->altsetting,
775 fmt->bFormatType);
776 return -ENOTSUPP;
777 }
778 fp->fmt_type = fmt->bFormatType;
779 if (err < 0)
780 return err;
781 #if 1
782 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
783 /* extigy apparently supports sample rates other than 48k
784 * but not in ordinary way. so we enable only 48k atm.
785 */
786 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
787 chip->usb_id == USB_ID(0x041e, 0x3020) ||
788 chip->usb_id == USB_ID(0x041e, 0x3061)) {
789 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
790 fp->rates != SNDRV_PCM_RATE_48000 &&
791 fp->rates != SNDRV_PCM_RATE_96000)
792 return -ENOTSUPP;
793 }
794 #endif
795 return 0;
796 }
797
snd_usb_parse_audio_format_v3(struct snd_usb_audio * chip,struct audioformat * fp,struct uac3_as_header_descriptor * as,int stream)798 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
799 struct audioformat *fp,
800 struct uac3_as_header_descriptor *as,
801 int stream)
802 {
803 u64 format = le64_to_cpu(as->bmFormats);
804 int err;
805
806 /*
807 * Type I format bits are D0..D6
808 * This test works because type IV is not supported
809 */
810 if (format & 0x7f)
811 fp->fmt_type = UAC_FORMAT_TYPE_I;
812 else
813 fp->fmt_type = UAC_FORMAT_TYPE_III;
814
815 err = parse_audio_format_i(chip, fp, format, as);
816 if (err < 0)
817 return err;
818
819 return 0;
820 }
821