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 /* clear special format bit to avoid "unsupported format" msg below */
64 format &= ~UAC2_FORMAT_TYPE_I_RAW_DATA;
65 }
66
67 format <<= 1;
68 break;
69 }
70 case UAC_VERSION_3: {
71 struct uac3_as_header_descriptor *as = _fmt;
72
73 sample_width = as->bBitResolution;
74 sample_bytes = as->bSubslotSize;
75
76 if (format & UAC3_FORMAT_TYPE_I_RAW_DATA) {
77 pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL;
78 /* clear special format bit to avoid "unsupported format" msg below */
79 format &= ~UAC3_FORMAT_TYPE_I_RAW_DATA;
80 }
81
82 format <<= 1;
83 break;
84 }
85 }
86
87 fp->fmt_bits = sample_width;
88
89 if ((pcm_formats == 0) &&
90 (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) {
91 /* some devices don't define this correctly... */
92 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
93 fp->iface, fp->altsetting);
94 format = 1 << UAC_FORMAT_TYPE_I_PCM;
95 }
96 if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
97 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
98 /* Edirol SD-90 */
99 (chip->usb_id == USB_ID(0x0582, 0x000c))) &&
100 /* Roland SC-D70 */
101 sample_width == 24 && sample_bytes == 2)
102 sample_bytes = 3;
103 else if (sample_width > sample_bytes * 8) {
104 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
105 fp->iface, fp->altsetting,
106 sample_width, sample_bytes);
107 }
108 /* check the format byte size */
109 switch (sample_bytes) {
110 case 1:
111 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
112 break;
113 case 2:
114 if (snd_usb_is_big_endian_format(chip, fp))
115 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
116 else
117 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
118 break;
119 case 3:
120 if (snd_usb_is_big_endian_format(chip, fp))
121 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
122 else
123 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
124 break;
125 case 4:
126 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
127 break;
128 default:
129 usb_audio_info(chip,
130 "%u:%d : unsupported sample bitwidth %d in %d bytes\n",
131 fp->iface, fp->altsetting,
132 sample_width, sample_bytes);
133 break;
134 }
135 }
136 if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
137 /* Dallas DS4201 workaround: it advertises U8 format, but really
138 supports S8. */
139 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
140 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
141 else
142 pcm_formats |= SNDRV_PCM_FMTBIT_U8;
143 }
144 if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
145 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
146 }
147 if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
148 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
149 }
150 if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
151 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
152 }
153 if (format & ~0x3f) {
154 usb_audio_info(chip,
155 "%u:%d : unsupported format bits %#llx\n",
156 fp->iface, fp->altsetting, format);
157 }
158
159 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
160
161 return pcm_formats;
162 }
163
set_fixed_rate(struct audioformat * fp,int rate,int rate_bits)164 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
165 {
166 kfree(fp->rate_table);
167 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
168 if (!fp->rate_table)
169 return -ENOMEM;
170 fp->nr_rates = 1;
171 fp->rate_min = rate;
172 fp->rate_max = rate;
173 fp->rates = rate_bits;
174 fp->rate_table[0] = rate;
175 return 0;
176 }
177
178 /* set up rate_min, rate_max and rates from the rate table */
set_rate_table_min_max(struct audioformat * fp)179 static void set_rate_table_min_max(struct audioformat *fp)
180 {
181 unsigned int rate;
182 int i;
183
184 fp->rate_min = INT_MAX;
185 fp->rate_max = 0;
186 fp->rates = 0;
187 for (i = 0; i < fp->nr_rates; i++) {
188 rate = fp->rate_table[i];
189 fp->rate_min = min(fp->rate_min, rate);
190 fp->rate_max = max(fp->rate_max, rate);
191 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
192 }
193 }
194
195 /*
196 * parse the format descriptor and stores the possible sample rates
197 * on the audioformat table (audio class v1).
198 *
199 * @dev: usb device
200 * @fp: audioformat record
201 * @fmt: the format descriptor
202 * @offset: the start offset of descriptor pointing the rate type
203 * (7 for type I and II, 8 for type II)
204 */
parse_audio_format_rates_v1(struct snd_usb_audio * chip,struct audioformat * fp,unsigned char * fmt,int offset)205 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
206 unsigned char *fmt, int offset)
207 {
208 int nr_rates = fmt[offset];
209
210 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
211 usb_audio_err(chip,
212 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
213 fp->iface, fp->altsetting);
214 return -EINVAL;
215 }
216
217 if (nr_rates) {
218 /*
219 * build the rate table and bitmap flags
220 */
221 int r, idx;
222
223 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
224 GFP_KERNEL);
225 if (fp->rate_table == NULL)
226 return -ENOMEM;
227
228 fp->nr_rates = 0;
229 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
230 unsigned int rate = combine_triple(&fmt[idx]);
231 if (!rate)
232 continue;
233 /* C-Media CM6501 mislabels its 96 kHz altsetting */
234 /* Terratec Aureon 7.1 USB C-Media 6206, too */
235 /* Ozone Z90 USB C-Media, too */
236 if (rate == 48000 && nr_rates == 1 &&
237 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
238 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
239 chip->usb_id == USB_ID(0x0d8c, 0x0078) ||
240 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
241 fp->altsetting == 5 && fp->maxpacksize == 392)
242 rate = 96000;
243 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
244 if (rate == 16000 &&
245 (chip->usb_id == USB_ID(0x041e, 0x4064) ||
246 chip->usb_id == USB_ID(0x041e, 0x4068)))
247 rate = 8000;
248
249 fp->rate_table[fp->nr_rates++] = rate;
250 }
251 if (!fp->nr_rates) {
252 usb_audio_info(chip,
253 "%u:%d: All rates were zero\n",
254 fp->iface, fp->altsetting);
255 return -EINVAL;
256 }
257 set_rate_table_min_max(fp);
258 } else {
259 /* continuous rates */
260 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
261 fp->rate_min = combine_triple(&fmt[offset + 1]);
262 fp->rate_max = combine_triple(&fmt[offset + 4]);
263 }
264
265 /* Jabra Evolve 65 headset */
266 if (chip->usb_id == USB_ID(0x0b0e, 0x030b) ||
267 chip->usb_id == USB_ID(0x0b0e, 0x030c)) {
268 /* only 48kHz for playback while keeping 16kHz for capture */
269 if (fp->nr_rates != 1)
270 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
271 }
272
273 return 0;
274 }
275
276
277 /*
278 * Presonus Studio 1810c supports a limited set of sampling
279 * rates per altsetting but reports the full set each time.
280 * If we don't filter out the unsupported rates and attempt
281 * to configure the card, it will hang refusing to do any
282 * further audio I/O until a hard reset is performed.
283 *
284 * The list of supported rates per altsetting (set of available
285 * I/O channels) is described in the owner's manual, section 2.2.
286 */
s1810c_valid_sample_rate(struct audioformat * fp,unsigned int rate)287 static bool s1810c_valid_sample_rate(struct audioformat *fp,
288 unsigned int rate)
289 {
290 switch (fp->altsetting) {
291 case 1:
292 /* All ADAT ports available */
293 return rate <= 48000;
294 case 2:
295 /* Half of ADAT ports available */
296 return (rate == 88200 || rate == 96000);
297 case 3:
298 /* Analog I/O only (no S/PDIF nor ADAT) */
299 return rate >= 176400;
300 default:
301 return false;
302 }
303 return false;
304 }
305
306 /*
307 * Many Focusrite devices supports a limited set of sampling rates per
308 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
309 * descriptor which has a non-standard bLength = 10.
310 */
focusrite_valid_sample_rate(struct snd_usb_audio * chip,struct audioformat * fp,unsigned int rate)311 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
312 struct audioformat *fp,
313 unsigned int rate)
314 {
315 struct usb_interface *iface;
316 struct usb_host_interface *alts;
317 unsigned char *fmt;
318 unsigned int max_rate;
319
320 iface = usb_ifnum_to_if(chip->dev, fp->iface);
321 if (!iface)
322 return true;
323
324 alts = &iface->altsetting[fp->altset_idx];
325 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
326 NULL, UAC_FORMAT_TYPE);
327 if (!fmt)
328 return true;
329
330 if (fmt[0] == 10) { /* bLength */
331 max_rate = combine_quad(&fmt[6]);
332
333 /* Validate max rate */
334 if (max_rate != 48000 &&
335 max_rate != 96000 &&
336 max_rate != 192000 &&
337 max_rate != 384000) {
338
339 usb_audio_info(chip,
340 "%u:%d : unexpected max rate: %u\n",
341 fp->iface, fp->altsetting, max_rate);
342
343 return true;
344 }
345
346 return rate <= max_rate;
347 }
348
349 return true;
350 }
351
352 /*
353 * Helper function to walk the array of sample rate triplets reported by
354 * the device. The problem is that we need to parse whole array first to
355 * get to know how many sample rates we have to expect.
356 * Then fp->rate_table can be allocated and filled.
357 */
parse_uac2_sample_rate_range(struct snd_usb_audio * chip,struct audioformat * fp,int nr_triplets,const unsigned char * data)358 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
359 struct audioformat *fp, int nr_triplets,
360 const unsigned char *data)
361 {
362 int i, nr_rates = 0;
363
364 for (i = 0; i < nr_triplets; i++) {
365 int min = combine_quad(&data[2 + 12 * i]);
366 int max = combine_quad(&data[6 + 12 * i]);
367 int res = combine_quad(&data[10 + 12 * i]);
368 unsigned int rate;
369
370 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
371 continue;
372
373 /*
374 * for ranges with res == 1, we announce a continuous sample
375 * rate range, and this function should return 0 for no further
376 * parsing.
377 */
378 if (res == 1) {
379 fp->rate_min = min;
380 fp->rate_max = max;
381 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
382 return 0;
383 }
384
385 for (rate = min; rate <= max; rate += res) {
386
387 /* Filter out invalid rates on Presonus Studio 1810c */
388 if (chip->usb_id == USB_ID(0x194f, 0x010c) &&
389 !s1810c_valid_sample_rate(fp, rate))
390 goto skip_rate;
391
392 /* Filter out invalid rates on Focusrite devices */
393 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
394 !focusrite_valid_sample_rate(chip, fp, rate))
395 goto skip_rate;
396
397 if (fp->rate_table)
398 fp->rate_table[nr_rates] = rate;
399 nr_rates++;
400 if (nr_rates >= MAX_NR_RATES) {
401 usb_audio_err(chip, "invalid uac2 rates\n");
402 break;
403 }
404
405 skip_rate:
406 /* avoid endless loop */
407 if (res == 0)
408 break;
409 }
410 }
411
412 return nr_rates;
413 }
414
415 /* Line6 Helix series and the Rode Rodecaster Pro don't support the
416 * UAC2_CS_RANGE usb function call. Return a static table of known
417 * clock rates.
418 */
line6_parse_audio_format_rates_quirk(struct snd_usb_audio * chip,struct audioformat * fp)419 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
420 struct audioformat *fp)
421 {
422 switch (chip->usb_id) {
423 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
424 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
425 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
426 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
427 case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */
428 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
429 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
430 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
431 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
432 case USB_ID(0x0e41, 0x424b): /* Line6 Pod Go */
433 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
434 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
435 }
436
437 return -ENODEV;
438 }
439
440 /* 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)441 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,
442 int altsetting)
443 {
444 struct usb_device *dev = chip->dev;
445 __le64 raw_data = 0;
446 u64 data;
447 int err;
448
449 /* we assume 64bit is enough for any altsettings */
450 if (snd_BUG_ON(altsetting >= 64 - 8))
451 return false;
452
453 err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
454 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
455 UAC2_AS_VAL_ALT_SETTINGS << 8,
456 iface, &raw_data, sizeof(raw_data));
457 if (err < 0)
458 return false;
459
460 data = le64_to_cpu(raw_data);
461 /* first byte contains the bitmap size */
462 if ((data & 0xff) * 8 < altsetting)
463 return false;
464 if (data & (1ULL << (altsetting + 8)))
465 return true;
466
467 return false;
468 }
469
470 /*
471 * Validate each sample rate with the altsetting
472 * Rebuild the rate table if only partial values are valid
473 */
validate_sample_rate_table_v2v3(struct snd_usb_audio * chip,struct audioformat * fp,int clock)474 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,
475 struct audioformat *fp,
476 int clock)
477 {
478 struct usb_device *dev = chip->dev;
479 struct usb_host_interface *alts;
480 unsigned int *table;
481 unsigned int nr_rates;
482 int i, err;
483 u32 bmControls;
484
485 /* performing the rate verification may lead to unexpected USB bus
486 * behavior afterwards by some unknown reason. Do this only for the
487 * known devices.
488 */
489 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES))
490 return 0; /* don't perform the validation as default */
491
492 alts = snd_usb_get_host_interface(chip, fp->iface, fp->altsetting);
493 if (!alts)
494 return 0;
495
496 if (fp->protocol == UAC_VERSION_3) {
497 struct uac3_as_header_descriptor *as = snd_usb_find_csint_desc(
498 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
499 bmControls = le32_to_cpu(as->bmControls);
500 } else {
501 struct uac2_as_header_descriptor *as = snd_usb_find_csint_desc(
502 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
503 bmControls = as->bmControls;
504 }
505
506 if (!uac_v2v3_control_is_readable(bmControls,
507 UAC2_AS_VAL_ALT_SETTINGS))
508 return 0;
509
510 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
511 if (!table)
512 return -ENOMEM;
513
514 /* clear the interface altsetting at first */
515 usb_set_interface(dev, fp->iface, 0);
516
517 nr_rates = 0;
518 for (i = 0; i < fp->nr_rates; i++) {
519 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
520 fp->rate_table[i]);
521 if (err < 0)
522 continue;
523
524 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))
525 table[nr_rates++] = fp->rate_table[i];
526 }
527
528 if (!nr_rates) {
529 usb_audio_dbg(chip,
530 "No valid sample rate available for %d:%d, assuming a firmware bug\n",
531 fp->iface, fp->altsetting);
532 nr_rates = fp->nr_rates; /* continue as is */
533 }
534
535 if (fp->nr_rates == nr_rates) {
536 kfree(table);
537 return 0;
538 }
539
540 kfree(fp->rate_table);
541 fp->rate_table = table;
542 fp->nr_rates = nr_rates;
543 return 0;
544 }
545
546 /*
547 * parse the format descriptor and stores the possible sample rates
548 * on the audioformat table (audio class v2 and v3).
549 */
parse_audio_format_rates_v2v3(struct snd_usb_audio * chip,struct audioformat * fp)550 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
551 struct audioformat *fp)
552 {
553 struct usb_device *dev = chip->dev;
554 unsigned char tmp[2], *data;
555 int nr_triplets, data_size, ret = 0, ret_l6;
556 int clock = snd_usb_clock_find_source(chip, fp, false);
557
558 if (clock < 0) {
559 dev_err(&dev->dev,
560 "%s(): unable to find clock source (clock %d)\n",
561 __func__, clock);
562 goto err;
563 }
564
565 /* get the number of sample rates first by only fetching 2 bytes */
566 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
567 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
568 UAC2_CS_CONTROL_SAM_FREQ << 8,
569 snd_usb_ctrl_intf(chip) | (clock << 8),
570 tmp, sizeof(tmp));
571
572 if (ret < 0) {
573 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
574 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
575 if (ret_l6 == -ENODEV) {
576 /* no line6 device found continue showing the error */
577 dev_err(&dev->dev,
578 "%s(): unable to retrieve number of sample rates (clock %d)\n",
579 __func__, clock);
580 goto err;
581 }
582 if (ret_l6 == 0) {
583 dev_info(&dev->dev,
584 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
585 __func__, clock);
586 return 0;
587 }
588 ret = ret_l6;
589 goto err;
590 }
591
592 nr_triplets = (tmp[1] << 8) | tmp[0];
593 data_size = 2 + 12 * nr_triplets;
594 data = kzalloc(data_size, GFP_KERNEL);
595 if (!data) {
596 ret = -ENOMEM;
597 goto err;
598 }
599
600 /* now get the full information */
601 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
602 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
603 UAC2_CS_CONTROL_SAM_FREQ << 8,
604 snd_usb_ctrl_intf(chip) | (clock << 8),
605 data, data_size);
606
607 if (ret < 0) {
608 dev_err(&dev->dev,
609 "%s(): unable to retrieve sample rate range (clock %d)\n",
610 __func__, clock);
611 ret = -EINVAL;
612 goto err_free;
613 }
614
615 /* Call the triplet parser, and make sure fp->rate_table is NULL.
616 * We just use the return value to know how many sample rates we
617 * will have to deal with. */
618 kfree(fp->rate_table);
619 fp->rate_table = NULL;
620 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
621
622 if (fp->nr_rates == 0) {
623 /* SNDRV_PCM_RATE_CONTINUOUS */
624 ret = 0;
625 goto err_free;
626 }
627
628 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
629 if (!fp->rate_table) {
630 ret = -ENOMEM;
631 goto err_free;
632 }
633
634 /* Call the triplet parser again, but this time, fp->rate_table is
635 * allocated, so the rates will be stored */
636 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
637
638 ret = validate_sample_rate_table_v2v3(chip, fp, clock);
639 if (ret < 0)
640 goto err_free;
641
642 set_rate_table_min_max(fp);
643
644 err_free:
645 kfree(data);
646 err:
647 return ret;
648 }
649
650 /*
651 * parse the format type I and III descriptors
652 */
parse_audio_format_i(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)653 static int parse_audio_format_i(struct snd_usb_audio *chip,
654 struct audioformat *fp, u64 format,
655 void *_fmt)
656 {
657 snd_pcm_format_t pcm_format;
658 unsigned int fmt_type;
659 int ret;
660
661 switch (fp->protocol) {
662 default:
663 case UAC_VERSION_1:
664 case UAC_VERSION_2: {
665 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
666
667 fmt_type = fmt->bFormatType;
668 break;
669 }
670 case UAC_VERSION_3: {
671 /* fp->fmt_type is already set in this case */
672 fmt_type = fp->fmt_type;
673 break;
674 }
675 }
676
677 if (fmt_type == UAC_FORMAT_TYPE_III) {
678 /* FIXME: the format type is really IECxxx
679 * but we give normal PCM format to get the existing
680 * apps working...
681 */
682 switch (chip->usb_id) {
683
684 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
685 if (chip->setup == 0x00 &&
686 fp->altsetting == 6)
687 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
688 else
689 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
690 break;
691 default:
692 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
693 }
694 fp->formats = pcm_format_to_bits(pcm_format);
695 } else {
696 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
697 if (!fp->formats)
698 return -EINVAL;
699 }
700
701 /* gather possible sample rates */
702 /* audio class v1 reports possible sample rates as part of the
703 * proprietary class specific descriptor.
704 * audio class v2 uses class specific EP0 range requests for that.
705 */
706 switch (fp->protocol) {
707 default:
708 case UAC_VERSION_1: {
709 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
710
711 fp->channels = fmt->bNrChannels;
712 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
713 break;
714 }
715 case UAC_VERSION_2:
716 case UAC_VERSION_3: {
717 /* fp->channels is already set in this case */
718 ret = parse_audio_format_rates_v2v3(chip, fp);
719 break;
720 }
721 }
722
723 if (fp->channels < 1) {
724 usb_audio_err(chip,
725 "%u:%d : invalid channels %d\n",
726 fp->iface, fp->altsetting, fp->channels);
727 return -EINVAL;
728 }
729
730 return ret;
731 }
732
733 /*
734 * parse the format type II descriptor
735 */
parse_audio_format_ii(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)736 static int parse_audio_format_ii(struct snd_usb_audio *chip,
737 struct audioformat *fp,
738 u64 format, void *_fmt)
739 {
740 int brate, framesize, ret;
741
742 switch (format) {
743 case UAC_FORMAT_TYPE_II_AC3:
744 /* FIXME: there is no AC3 format defined yet */
745 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
746 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
747 break;
748 case UAC_FORMAT_TYPE_II_MPEG:
749 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
750 break;
751 default:
752 usb_audio_info(chip,
753 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
754 fp->iface, fp->altsetting, format);
755 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
756 break;
757 }
758
759 fp->channels = 1;
760
761 switch (fp->protocol) {
762 default:
763 case UAC_VERSION_1: {
764 struct uac_format_type_ii_discrete_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_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
770 break;
771 }
772 case UAC_VERSION_2: {
773 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
774 brate = le16_to_cpu(fmt->wMaxBitRate);
775 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
776 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
777 fp->frame_size = framesize;
778 ret = parse_audio_format_rates_v2v3(chip, fp);
779 break;
780 }
781 }
782
783 return ret;
784 }
785
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)786 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
787 struct audioformat *fp, u64 format,
788 struct uac_format_type_i_continuous_descriptor *fmt,
789 int stream)
790 {
791 int err;
792
793 switch (fmt->bFormatType) {
794 case UAC_FORMAT_TYPE_I:
795 case UAC_FORMAT_TYPE_III:
796 err = parse_audio_format_i(chip, fp, format, fmt);
797 break;
798 case UAC_FORMAT_TYPE_II:
799 err = parse_audio_format_ii(chip, fp, format, fmt);
800 break;
801 default:
802 usb_audio_info(chip,
803 "%u:%d : format type %d is not supported yet\n",
804 fp->iface, fp->altsetting,
805 fmt->bFormatType);
806 return -ENOTSUPP;
807 }
808 fp->fmt_type = fmt->bFormatType;
809 if (err < 0)
810 return err;
811 #if 1
812 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
813 /* extigy apparently supports sample rates other than 48k
814 * but not in ordinary way. so we enable only 48k atm.
815 */
816 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
817 chip->usb_id == USB_ID(0x041e, 0x3020) ||
818 chip->usb_id == USB_ID(0x041e, 0x3061)) {
819 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
820 fp->rates != SNDRV_PCM_RATE_48000 &&
821 fp->rates != SNDRV_PCM_RATE_96000)
822 return -ENOTSUPP;
823 }
824 #endif
825 return 0;
826 }
827
snd_usb_parse_audio_format_v3(struct snd_usb_audio * chip,struct audioformat * fp,struct uac3_as_header_descriptor * as,int stream)828 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
829 struct audioformat *fp,
830 struct uac3_as_header_descriptor *as,
831 int stream)
832 {
833 u64 format = le64_to_cpu(as->bmFormats);
834 int err;
835
836 /*
837 * Type I format bits are D0..D6
838 * This test works because type IV is not supported
839 */
840 if (format & 0x7f)
841 fp->fmt_type = UAC_FORMAT_TYPE_I;
842 else
843 fp->fmt_type = UAC_FORMAT_TYPE_III;
844
845 err = parse_audio_format_i(chip, fp, format, as);
846 if (err < 0)
847 return err;
848
849 return 0;
850 }
851