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 /* only 48kHz for playback while keeping 16kHz for capture */
268 if (fp->nr_rates != 1)
269 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
270 }
271
272 return 0;
273 }
274
275
276 /*
277 * Presonus Studio 1810c supports a limited set of sampling
278 * rates per altsetting but reports the full set each time.
279 * If we don't filter out the unsupported rates and attempt
280 * to configure the card, it will hang refusing to do any
281 * further audio I/O until a hard reset is performed.
282 *
283 * The list of supported rates per altsetting (set of available
284 * I/O channels) is described in the owner's manual, section 2.2.
285 */
s1810c_valid_sample_rate(struct audioformat * fp,unsigned int rate)286 static bool s1810c_valid_sample_rate(struct audioformat *fp,
287 unsigned int rate)
288 {
289 switch (fp->altsetting) {
290 case 1:
291 /* All ADAT ports available */
292 return rate <= 48000;
293 case 2:
294 /* Half of ADAT ports available */
295 return (rate == 88200 || rate == 96000);
296 case 3:
297 /* Analog I/O only (no S/PDIF nor ADAT) */
298 return rate >= 176400;
299 default:
300 return false;
301 }
302 return false;
303 }
304
305 /*
306 * Many Focusrite devices supports a limited set of sampling rates per
307 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
308 * descriptor which has a non-standard bLength = 10.
309 */
focusrite_valid_sample_rate(struct snd_usb_audio * chip,struct audioformat * fp,unsigned int rate)310 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
311 struct audioformat *fp,
312 unsigned int rate)
313 {
314 struct usb_interface *iface;
315 struct usb_host_interface *alts;
316 unsigned char *fmt;
317 unsigned int max_rate;
318
319 iface = usb_ifnum_to_if(chip->dev, fp->iface);
320 if (!iface)
321 return true;
322
323 alts = &iface->altsetting[fp->altset_idx];
324 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
325 NULL, UAC_FORMAT_TYPE);
326 if (!fmt)
327 return true;
328
329 if (fmt[0] == 10) { /* bLength */
330 max_rate = combine_quad(&fmt[6]);
331
332 /* Validate max rate */
333 if (max_rate != 48000 &&
334 max_rate != 96000 &&
335 max_rate != 192000 &&
336 max_rate != 384000) {
337
338 usb_audio_info(chip,
339 "%u:%d : unexpected max rate: %u\n",
340 fp->iface, fp->altsetting, max_rate);
341
342 return true;
343 }
344
345 return rate <= max_rate;
346 }
347
348 return true;
349 }
350
351 /*
352 * Helper function to walk the array of sample rate triplets reported by
353 * the device. The problem is that we need to parse whole array first to
354 * get to know how many sample rates we have to expect.
355 * Then fp->rate_table can be allocated and filled.
356 */
parse_uac2_sample_rate_range(struct snd_usb_audio * chip,struct audioformat * fp,int nr_triplets,const unsigned char * data)357 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
358 struct audioformat *fp, int nr_triplets,
359 const unsigned char *data)
360 {
361 int i, nr_rates = 0;
362
363 for (i = 0; i < nr_triplets; i++) {
364 int min = combine_quad(&data[2 + 12 * i]);
365 int max = combine_quad(&data[6 + 12 * i]);
366 int res = combine_quad(&data[10 + 12 * i]);
367 unsigned int rate;
368
369 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
370 continue;
371
372 /*
373 * for ranges with res == 1, we announce a continuous sample
374 * rate range, and this function should return 0 for no further
375 * parsing.
376 */
377 if (res == 1) {
378 fp->rate_min = min;
379 fp->rate_max = max;
380 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
381 return 0;
382 }
383
384 for (rate = min; rate <= max; rate += res) {
385
386 /* Filter out invalid rates on Presonus Studio 1810c */
387 if (chip->usb_id == USB_ID(0x194f, 0x010c) &&
388 !s1810c_valid_sample_rate(fp, rate))
389 goto skip_rate;
390
391 /* Filter out invalid rates on Focusrite devices */
392 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
393 !focusrite_valid_sample_rate(chip, fp, rate))
394 goto skip_rate;
395
396 if (fp->rate_table)
397 fp->rate_table[nr_rates] = rate;
398 nr_rates++;
399 if (nr_rates >= MAX_NR_RATES) {
400 usb_audio_err(chip, "invalid uac2 rates\n");
401 break;
402 }
403
404 skip_rate:
405 /* avoid endless loop */
406 if (res == 0)
407 break;
408 }
409 }
410
411 return nr_rates;
412 }
413
414 /* Line6 Helix series and the Rode Rodecaster Pro don't support the
415 * UAC2_CS_RANGE usb function call. Return a static table of known
416 * clock rates.
417 */
line6_parse_audio_format_rates_quirk(struct snd_usb_audio * chip,struct audioformat * fp)418 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
419 struct audioformat *fp)
420 {
421 switch (chip->usb_id) {
422 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
423 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
424 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
425 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
426 case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */
427 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
428 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
429 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
430 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
431 case USB_ID(0x0e41, 0x424b): /* Line6 Pod Go */
432 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
433 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
434 }
435
436 return -ENODEV;
437 }
438
439 /* 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)440 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,
441 int altsetting)
442 {
443 struct usb_device *dev = chip->dev;
444 __le64 raw_data = 0;
445 u64 data;
446 int err;
447
448 /* we assume 64bit is enough for any altsettings */
449 if (snd_BUG_ON(altsetting >= 64 - 8))
450 return false;
451
452 err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
453 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
454 UAC2_AS_VAL_ALT_SETTINGS << 8,
455 iface, &raw_data, sizeof(raw_data));
456 if (err < 0)
457 return false;
458
459 data = le64_to_cpu(raw_data);
460 /* first byte contains the bitmap size */
461 if ((data & 0xff) * 8 < altsetting)
462 return false;
463 if (data & (1ULL << (altsetting + 8)))
464 return true;
465
466 return false;
467 }
468
469 /*
470 * Validate each sample rate with the altsetting
471 * Rebuild the rate table if only partial values are valid
472 */
validate_sample_rate_table_v2v3(struct snd_usb_audio * chip,struct audioformat * fp,int clock)473 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,
474 struct audioformat *fp,
475 int clock)
476 {
477 struct usb_device *dev = chip->dev;
478 struct usb_host_interface *alts;
479 unsigned int *table;
480 unsigned int nr_rates;
481 int i, err;
482 u32 bmControls;
483
484 /* performing the rate verification may lead to unexpected USB bus
485 * behavior afterwards by some unknown reason. Do this only for the
486 * known devices.
487 */
488 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES))
489 return 0; /* don't perform the validation as default */
490
491 alts = snd_usb_get_host_interface(chip, fp->iface, fp->altsetting);
492 if (!alts)
493 return 0;
494
495 if (fp->protocol == UAC_VERSION_3) {
496 struct uac3_as_header_descriptor *as = snd_usb_find_csint_desc(
497 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
498 bmControls = le32_to_cpu(as->bmControls);
499 } else {
500 struct uac2_as_header_descriptor *as = snd_usb_find_csint_desc(
501 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
502 bmControls = as->bmControls;
503 }
504
505 if (!uac_v2v3_control_is_readable(bmControls,
506 UAC2_AS_VAL_ALT_SETTINGS))
507 return 0;
508
509 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
510 if (!table)
511 return -ENOMEM;
512
513 /* clear the interface altsetting at first */
514 usb_set_interface(dev, fp->iface, 0);
515
516 nr_rates = 0;
517 for (i = 0; i < fp->nr_rates; i++) {
518 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
519 fp->rate_table[i]);
520 if (err < 0)
521 continue;
522
523 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))
524 table[nr_rates++] = fp->rate_table[i];
525 }
526
527 if (!nr_rates) {
528 usb_audio_dbg(chip,
529 "No valid sample rate available for %d:%d, assuming a firmware bug\n",
530 fp->iface, fp->altsetting);
531 nr_rates = fp->nr_rates; /* continue as is */
532 }
533
534 if (fp->nr_rates == nr_rates) {
535 kfree(table);
536 return 0;
537 }
538
539 kfree(fp->rate_table);
540 fp->rate_table = table;
541 fp->nr_rates = nr_rates;
542 return 0;
543 }
544
545 /*
546 * parse the format descriptor and stores the possible sample rates
547 * on the audioformat table (audio class v2 and v3).
548 */
parse_audio_format_rates_v2v3(struct snd_usb_audio * chip,struct audioformat * fp)549 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
550 struct audioformat *fp)
551 {
552 struct usb_device *dev = chip->dev;
553 unsigned char tmp[2], *data;
554 int nr_triplets, data_size, ret = 0, ret_l6;
555 int clock = snd_usb_clock_find_source(chip, fp, false);
556
557 if (clock < 0) {
558 dev_err(&dev->dev,
559 "%s(): unable to find clock source (clock %d)\n",
560 __func__, clock);
561 goto err;
562 }
563
564 /* get the number of sample rates first by only fetching 2 bytes */
565 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
566 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
567 UAC2_CS_CONTROL_SAM_FREQ << 8,
568 snd_usb_ctrl_intf(chip) | (clock << 8),
569 tmp, sizeof(tmp));
570
571 if (ret < 0) {
572 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
573 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
574 if (ret_l6 == -ENODEV) {
575 /* no line6 device found continue showing the error */
576 dev_err(&dev->dev,
577 "%s(): unable to retrieve number of sample rates (clock %d)\n",
578 __func__, clock);
579 goto err;
580 }
581 if (ret_l6 == 0) {
582 dev_info(&dev->dev,
583 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
584 __func__, clock);
585 return 0;
586 }
587 ret = ret_l6;
588 goto err;
589 }
590
591 nr_triplets = (tmp[1] << 8) | tmp[0];
592 data_size = 2 + 12 * nr_triplets;
593 data = kzalloc(data_size, GFP_KERNEL);
594 if (!data) {
595 ret = -ENOMEM;
596 goto err;
597 }
598
599 /* now get the full information */
600 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
601 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
602 UAC2_CS_CONTROL_SAM_FREQ << 8,
603 snd_usb_ctrl_intf(chip) | (clock << 8),
604 data, data_size);
605
606 if (ret < 0) {
607 dev_err(&dev->dev,
608 "%s(): unable to retrieve sample rate range (clock %d)\n",
609 __func__, clock);
610 ret = -EINVAL;
611 goto err_free;
612 }
613
614 /* Call the triplet parser, and make sure fp->rate_table is NULL.
615 * We just use the return value to know how many sample rates we
616 * will have to deal with. */
617 kfree(fp->rate_table);
618 fp->rate_table = NULL;
619 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
620
621 if (fp->nr_rates == 0) {
622 /* SNDRV_PCM_RATE_CONTINUOUS */
623 ret = 0;
624 goto err_free;
625 }
626
627 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
628 if (!fp->rate_table) {
629 ret = -ENOMEM;
630 goto err_free;
631 }
632
633 /* Call the triplet parser again, but this time, fp->rate_table is
634 * allocated, so the rates will be stored */
635 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
636
637 ret = validate_sample_rate_table_v2v3(chip, fp, clock);
638 if (ret < 0)
639 goto err_free;
640
641 set_rate_table_min_max(fp);
642
643 err_free:
644 kfree(data);
645 err:
646 return ret;
647 }
648
649 /*
650 * parse the format type I and III descriptors
651 */
parse_audio_format_i(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)652 static int parse_audio_format_i(struct snd_usb_audio *chip,
653 struct audioformat *fp, u64 format,
654 void *_fmt)
655 {
656 snd_pcm_format_t pcm_format;
657 unsigned int fmt_type;
658 int ret;
659
660 switch (fp->protocol) {
661 default:
662 case UAC_VERSION_1:
663 case UAC_VERSION_2: {
664 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
665
666 fmt_type = fmt->bFormatType;
667 break;
668 }
669 case UAC_VERSION_3: {
670 /* fp->fmt_type is already set in this case */
671 fmt_type = fp->fmt_type;
672 break;
673 }
674 }
675
676 if (fmt_type == UAC_FORMAT_TYPE_III) {
677 /* FIXME: the format type is really IECxxx
678 * but we give normal PCM format to get the existing
679 * apps working...
680 */
681 switch (chip->usb_id) {
682
683 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
684 if (chip->setup == 0x00 &&
685 fp->altsetting == 6)
686 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
687 else
688 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
689 break;
690 default:
691 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
692 }
693 fp->formats = pcm_format_to_bits(pcm_format);
694 } else {
695 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
696 if (!fp->formats)
697 return -EINVAL;
698 }
699
700 /* gather possible sample rates */
701 /* audio class v1 reports possible sample rates as part of the
702 * proprietary class specific descriptor.
703 * audio class v2 uses class specific EP0 range requests for that.
704 */
705 switch (fp->protocol) {
706 default:
707 case UAC_VERSION_1: {
708 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
709
710 fp->channels = fmt->bNrChannels;
711 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
712 break;
713 }
714 case UAC_VERSION_2:
715 case UAC_VERSION_3: {
716 /* fp->channels is already set in this case */
717 ret = parse_audio_format_rates_v2v3(chip, fp);
718 break;
719 }
720 }
721
722 if (fp->channels < 1) {
723 usb_audio_err(chip,
724 "%u:%d : invalid channels %d\n",
725 fp->iface, fp->altsetting, fp->channels);
726 return -EINVAL;
727 }
728
729 return ret;
730 }
731
732 /*
733 * parse the format type II descriptor
734 */
parse_audio_format_ii(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)735 static int parse_audio_format_ii(struct snd_usb_audio *chip,
736 struct audioformat *fp,
737 u64 format, void *_fmt)
738 {
739 int brate, framesize, ret;
740
741 switch (format) {
742 case UAC_FORMAT_TYPE_II_AC3:
743 /* FIXME: there is no AC3 format defined yet */
744 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
745 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
746 break;
747 case UAC_FORMAT_TYPE_II_MPEG:
748 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
749 break;
750 default:
751 usb_audio_info(chip,
752 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
753 fp->iface, fp->altsetting, format);
754 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
755 break;
756 }
757
758 fp->channels = 1;
759
760 switch (fp->protocol) {
761 default:
762 case UAC_VERSION_1: {
763 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
764 brate = le16_to_cpu(fmt->wMaxBitRate);
765 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
766 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
767 fp->frame_size = framesize;
768 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
769 break;
770 }
771 case UAC_VERSION_2: {
772 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
773 brate = le16_to_cpu(fmt->wMaxBitRate);
774 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
775 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
776 fp->frame_size = framesize;
777 ret = parse_audio_format_rates_v2v3(chip, fp);
778 break;
779 }
780 }
781
782 return ret;
783 }
784
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)785 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
786 struct audioformat *fp, u64 format,
787 struct uac_format_type_i_continuous_descriptor *fmt,
788 int stream)
789 {
790 int err;
791
792 switch (fmt->bFormatType) {
793 case UAC_FORMAT_TYPE_I:
794 case UAC_FORMAT_TYPE_III:
795 err = parse_audio_format_i(chip, fp, format, fmt);
796 break;
797 case UAC_FORMAT_TYPE_II:
798 err = parse_audio_format_ii(chip, fp, format, fmt);
799 break;
800 default:
801 usb_audio_info(chip,
802 "%u:%d : format type %d is not supported yet\n",
803 fp->iface, fp->altsetting,
804 fmt->bFormatType);
805 return -ENOTSUPP;
806 }
807 fp->fmt_type = fmt->bFormatType;
808 if (err < 0)
809 return err;
810 #if 1
811 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
812 /* extigy apparently supports sample rates other than 48k
813 * but not in ordinary way. so we enable only 48k atm.
814 */
815 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
816 chip->usb_id == USB_ID(0x041e, 0x3020) ||
817 chip->usb_id == USB_ID(0x041e, 0x3061)) {
818 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
819 fp->rates != SNDRV_PCM_RATE_48000 &&
820 fp->rates != SNDRV_PCM_RATE_96000)
821 return -ENOTSUPP;
822 }
823 #endif
824 return 0;
825 }
826
snd_usb_parse_audio_format_v3(struct snd_usb_audio * chip,struct audioformat * fp,struct uac3_as_header_descriptor * as,int stream)827 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
828 struct audioformat *fp,
829 struct uac3_as_header_descriptor *as,
830 int stream)
831 {
832 u64 format = le64_to_cpu(as->bmFormats);
833 int err;
834
835 /*
836 * Type I format bits are D0..D6
837 * This test works because type IV is not supported
838 */
839 if (format & 0x7f)
840 fp->fmt_type = UAC_FORMAT_TYPE_I;
841 else
842 fp->fmt_type = UAC_FORMAT_TYPE_III;
843
844 err = parse_audio_format_i(chip, fp, format, as);
845 if (err < 0)
846 return err;
847
848 return 0;
849 }
850