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 fp->fmt_sz = sample_bytes;
89
90 if ((pcm_formats == 0) &&
91 (format == 0 || format == BIT(UAC_FORMAT_TYPE_I_UNDEFINED))) {
92 /* some devices don't define this correctly... */
93 usb_audio_info(chip, "%u:%d : format type 0 is detected, processed as PCM\n",
94 fp->iface, fp->altsetting);
95 format = BIT(UAC_FORMAT_TYPE_I_PCM);
96 }
97 if (format & BIT(UAC_FORMAT_TYPE_I_PCM)) {
98 if (((chip->usb_id == USB_ID(0x0582, 0x0016)) ||
99 /* Edirol SD-90 */
100 (chip->usb_id == USB_ID(0x0582, 0x000c))) &&
101 /* Roland SC-D70 */
102 sample_width == 24 && sample_bytes == 2)
103 sample_bytes = 3;
104 else if (sample_width > sample_bytes * 8) {
105 usb_audio_info(chip, "%u:%d : sample bitwidth %d in over sample bytes %d\n",
106 fp->iface, fp->altsetting,
107 sample_width, sample_bytes);
108 }
109 /* check the format byte size */
110 switch (sample_bytes) {
111 case 1:
112 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
113 break;
114 case 2:
115 if (snd_usb_is_big_endian_format(chip, fp))
116 pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
117 else
118 pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
119 break;
120 case 3:
121 if (snd_usb_is_big_endian_format(chip, fp))
122 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
123 else
124 pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
125 break;
126 case 4:
127 pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
128 break;
129 default:
130 usb_audio_info(chip,
131 "%u:%d : unsupported sample bitwidth %d in %d bytes\n",
132 fp->iface, fp->altsetting,
133 sample_width, sample_bytes);
134 break;
135 }
136 }
137 if (format & BIT(UAC_FORMAT_TYPE_I_PCM8)) {
138 /* Dallas DS4201 workaround: it advertises U8 format, but really
139 supports S8. */
140 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
141 pcm_formats |= SNDRV_PCM_FMTBIT_S8;
142 else
143 pcm_formats |= SNDRV_PCM_FMTBIT_U8;
144 }
145 if (format & BIT(UAC_FORMAT_TYPE_I_IEEE_FLOAT))
146 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
147 if (format & BIT(UAC_FORMAT_TYPE_I_ALAW))
148 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
149 if (format & BIT(UAC_FORMAT_TYPE_I_MULAW))
150 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
151 if (format & ~0x3f) {
152 usb_audio_info(chip,
153 "%u:%d : unsupported format bits %#llx\n",
154 fp->iface, fp->altsetting, format);
155 }
156
157 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
158
159 return pcm_formats;
160 }
161
set_fixed_rate(struct audioformat * fp,int rate,int rate_bits)162 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
163 {
164 kfree(fp->rate_table);
165 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
166 if (!fp->rate_table)
167 return -ENOMEM;
168 fp->nr_rates = 1;
169 fp->rate_min = rate;
170 fp->rate_max = rate;
171 fp->rates = rate_bits;
172 fp->rate_table[0] = rate;
173 return 0;
174 }
175
176 /* set up rate_min, rate_max and rates from the rate table */
set_rate_table_min_max(struct audioformat * fp)177 static void set_rate_table_min_max(struct audioformat *fp)
178 {
179 unsigned int rate;
180 int i;
181
182 fp->rate_min = INT_MAX;
183 fp->rate_max = 0;
184 fp->rates = 0;
185 for (i = 0; i < fp->nr_rates; i++) {
186 rate = fp->rate_table[i];
187 fp->rate_min = min(fp->rate_min, rate);
188 fp->rate_max = max(fp->rate_max, rate);
189 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
190 }
191 }
192
193 /*
194 * parse the format descriptor and stores the possible sample rates
195 * on the audioformat table (audio class v1).
196 *
197 * @dev: usb device
198 * @fp: audioformat record
199 * @fmt: the format descriptor
200 * @offset: the start offset of descriptor pointing the rate type
201 * (7 for type I and II, 8 for type II)
202 */
parse_audio_format_rates_v1(struct snd_usb_audio * chip,struct audioformat * fp,unsigned char * fmt,int offset)203 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
204 unsigned char *fmt, int offset)
205 {
206 int nr_rates = fmt[offset];
207
208 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
209 usb_audio_err(chip,
210 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
211 fp->iface, fp->altsetting);
212 return -EINVAL;
213 }
214
215 if (nr_rates) {
216 /*
217 * build the rate table and bitmap flags
218 */
219 int r, idx;
220
221 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
222 GFP_KERNEL);
223 if (fp->rate_table == NULL)
224 return -ENOMEM;
225
226 fp->nr_rates = 0;
227 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
228 unsigned int rate = combine_triple(&fmt[idx]);
229 if (!rate)
230 continue;
231 /* C-Media CM6501 mislabels its 96 kHz altsetting */
232 /* Terratec Aureon 7.1 USB C-Media 6206, too */
233 /* Ozone Z90 USB C-Media, too */
234 if (rate == 48000 && nr_rates == 1 &&
235 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
236 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
237 chip->usb_id == USB_ID(0x0d8c, 0x0078) ||
238 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
239 fp->altsetting == 5 && fp->maxpacksize == 392)
240 rate = 96000;
241 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
242 if (rate == 16000 &&
243 (chip->usb_id == USB_ID(0x041e, 0x4064) ||
244 chip->usb_id == USB_ID(0x041e, 0x4068)))
245 rate = 8000;
246
247 fp->rate_table[fp->nr_rates++] = rate;
248 }
249 if (!fp->nr_rates) {
250 usb_audio_info(chip,
251 "%u:%d: All rates were zero\n",
252 fp->iface, fp->altsetting);
253 return -EINVAL;
254 }
255 set_rate_table_min_max(fp);
256 } else {
257 /* continuous rates */
258 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
259 fp->rate_min = combine_triple(&fmt[offset + 1]);
260 fp->rate_max = combine_triple(&fmt[offset + 4]);
261 }
262
263 /* Jabra Evolve 65 headset */
264 if (chip->usb_id == USB_ID(0x0b0e, 0x030b) ||
265 chip->usb_id == USB_ID(0x0b0e, 0x030c)) {
266 /* only 48kHz for playback while keeping 16kHz for capture */
267 if (fp->nr_rates != 1)
268 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
269 }
270
271 return 0;
272 }
273
274
275 /*
276 * Presonus Studio 1810c supports a limited set of sampling
277 * rates per altsetting but reports the full set each time.
278 * If we don't filter out the unsupported rates and attempt
279 * to configure the card, it will hang refusing to do any
280 * further audio I/O until a hard reset is performed.
281 *
282 * The list of supported rates per altsetting (set of available
283 * I/O channels) is described in the owner's manual, section 2.2.
284 */
s1810c_valid_sample_rate(struct audioformat * fp,unsigned int rate)285 static bool s1810c_valid_sample_rate(struct audioformat *fp,
286 unsigned int rate)
287 {
288 switch (fp->altsetting) {
289 case 1:
290 /* All ADAT ports available */
291 return rate <= 48000;
292 case 2:
293 /* Half of ADAT ports available */
294 return (rate == 88200 || rate == 96000);
295 case 3:
296 /* Analog I/O only (no S/PDIF nor ADAT) */
297 return rate >= 176400;
298 default:
299 return false;
300 }
301 return false;
302 }
303
304 /*
305 * Many Focusrite devices supports a limited set of sampling rates per
306 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
307 * descriptor which has a non-standard bLength = 10.
308 */
focusrite_valid_sample_rate(struct snd_usb_audio * chip,struct audioformat * fp,unsigned int rate)309 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
310 struct audioformat *fp,
311 unsigned int rate)
312 {
313 struct usb_host_interface *alts;
314 unsigned char *fmt;
315 unsigned int max_rate;
316
317 alts = snd_usb_get_host_interface(chip, fp->iface, fp->altsetting);
318 if (!alts)
319 return true;
320
321 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
322 NULL, UAC_FORMAT_TYPE);
323 if (!fmt)
324 return true;
325
326 if (fmt[0] == 10) { /* bLength */
327 max_rate = combine_quad(&fmt[6]);
328
329 switch (max_rate) {
330 case 48000:
331 return (rate == 44100 || rate == 48000);
332 case 96000:
333 return (rate == 88200 || rate == 96000);
334 case 192000:
335 return (rate == 176400 || rate == 192000);
336 default:
337 usb_audio_info(chip,
338 "%u:%d : unexpected max rate: %u\n",
339 fp->iface, fp->altsetting, max_rate);
340
341 return true;
342 }
343 }
344
345 return true;
346 }
347
348 /*
349 * Helper function to walk the array of sample rate triplets reported by
350 * the device. The problem is that we need to parse whole array first to
351 * get to know how many sample rates we have to expect.
352 * Then fp->rate_table can be allocated and filled.
353 */
parse_uac2_sample_rate_range(struct snd_usb_audio * chip,struct audioformat * fp,int nr_triplets,const unsigned char * data)354 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
355 struct audioformat *fp, int nr_triplets,
356 const unsigned char *data)
357 {
358 int i, nr_rates = 0;
359
360 for (i = 0; i < nr_triplets; i++) {
361 int min = combine_quad(&data[2 + 12 * i]);
362 int max = combine_quad(&data[6 + 12 * i]);
363 int res = combine_quad(&data[10 + 12 * i]);
364 unsigned int rate;
365
366 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
367 continue;
368
369 /*
370 * for ranges with res == 1, we announce a continuous sample
371 * rate range, and this function should return 0 for no further
372 * parsing.
373 */
374 if (res == 1) {
375 fp->rate_min = min;
376 fp->rate_max = max;
377 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
378 return 0;
379 }
380
381 for (rate = min; rate <= max; rate += res) {
382
383 /* Filter out invalid rates on Presonus Studio 1810c */
384 if (chip->usb_id == USB_ID(0x194f, 0x010c) &&
385 !s1810c_valid_sample_rate(fp, rate))
386 goto skip_rate;
387 /* Filter out invalid rates on Presonus Studio 1824c */
388 if (chip->usb_id == USB_ID(0x194f, 0x010d) &&
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 struct usb_host_interface *ctrl_intf;
558
559 ctrl_intf = snd_usb_find_ctrl_interface(chip, fp->iface);
560 if (clock < 0) {
561 dev_err(&dev->dev,
562 "%s(): unable to find clock source (clock %d)\n",
563 __func__, clock);
564 goto err;
565 }
566
567 /* get the number of sample rates first by only fetching 2 bytes */
568 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
569 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
570 UAC2_CS_CONTROL_SAM_FREQ << 8,
571 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8),
572 tmp, sizeof(tmp));
573
574 if (ret < 0) {
575 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
576 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
577 if (ret_l6 == -ENODEV) {
578 /* no line6 device found continue showing the error */
579 dev_err(&dev->dev,
580 "%s(): unable to retrieve number of sample rates (clock %d)\n",
581 __func__, clock);
582 goto err;
583 }
584 if (ret_l6 == 0) {
585 dev_info(&dev->dev,
586 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
587 __func__, clock);
588 return 0;
589 }
590 ret = ret_l6;
591 goto err;
592 }
593
594 nr_triplets = (tmp[1] << 8) | tmp[0];
595 data_size = 2 + 12 * nr_triplets;
596 data = kzalloc(data_size, GFP_KERNEL);
597 if (!data) {
598 ret = -ENOMEM;
599 goto err;
600 }
601
602 /* now get the full information */
603 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
604 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
605 UAC2_CS_CONTROL_SAM_FREQ << 8,
606 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8),
607 data, data_size);
608
609 if (ret < 0) {
610 dev_err(&dev->dev,
611 "%s(): unable to retrieve sample rate range (clock %d)\n",
612 __func__, clock);
613 ret = -EINVAL;
614 goto err_free;
615 }
616
617 /* Call the triplet parser, and make sure fp->rate_table is NULL.
618 * We just use the return value to know how many sample rates we
619 * will have to deal with. */
620 kfree(fp->rate_table);
621 fp->rate_table = NULL;
622 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
623
624 if (fp->nr_rates == 0) {
625 /* SNDRV_PCM_RATE_CONTINUOUS */
626 ret = 0;
627 goto err_free;
628 }
629
630 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
631 if (!fp->rate_table) {
632 ret = -ENOMEM;
633 goto err_free;
634 }
635
636 /* Call the triplet parser again, but this time, fp->rate_table is
637 * allocated, so the rates will be stored */
638 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
639
640 ret = validate_sample_rate_table_v2v3(chip, fp, clock);
641 if (ret < 0)
642 goto err_free;
643
644 set_rate_table_min_max(fp);
645
646 err_free:
647 kfree(data);
648 err:
649 return ret;
650 }
651
652 /*
653 * parse the format type I and III descriptors
654 */
parse_audio_format_i(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)655 static int parse_audio_format_i(struct snd_usb_audio *chip,
656 struct audioformat *fp, u64 format,
657 void *_fmt)
658 {
659 snd_pcm_format_t pcm_format;
660 unsigned int fmt_type;
661 int ret;
662
663 switch (fp->protocol) {
664 default:
665 case UAC_VERSION_1:
666 case UAC_VERSION_2: {
667 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
668
669 fmt_type = fmt->bFormatType;
670 break;
671 }
672 case UAC_VERSION_3: {
673 /* fp->fmt_type is already set in this case */
674 fmt_type = fp->fmt_type;
675 break;
676 }
677 }
678
679 if (fmt_type == UAC_FORMAT_TYPE_III) {
680 /* FIXME: the format type is really IECxxx
681 * but we give normal PCM format to get the existing
682 * apps working...
683 */
684 switch (chip->usb_id) {
685
686 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
687 if (chip->setup == 0x00 &&
688 fp->altsetting == 6)
689 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
690 else
691 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
692 break;
693 default:
694 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
695 }
696 fp->formats = pcm_format_to_bits(pcm_format);
697 } else {
698 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
699 if (!fp->formats)
700 return -EINVAL;
701 }
702
703 /* gather possible sample rates */
704 /* audio class v1 reports possible sample rates as part of the
705 * proprietary class specific descriptor.
706 * audio class v2 uses class specific EP0 range requests for that.
707 */
708 switch (fp->protocol) {
709 default:
710 case UAC_VERSION_1: {
711 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
712
713 fp->channels = fmt->bNrChannels;
714 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
715 break;
716 }
717 case UAC_VERSION_2:
718 case UAC_VERSION_3: {
719 /* fp->channels is already set in this case */
720 ret = parse_audio_format_rates_v2v3(chip, fp);
721 break;
722 }
723 }
724
725 if (fp->channels < 1) {
726 usb_audio_err(chip,
727 "%u:%d : invalid channels %d\n",
728 fp->iface, fp->altsetting, fp->channels);
729 return -EINVAL;
730 }
731
732 return ret;
733 }
734
735 /*
736 * parse the format type II descriptor
737 */
parse_audio_format_ii(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)738 static int parse_audio_format_ii(struct snd_usb_audio *chip,
739 struct audioformat *fp,
740 u64 format, void *_fmt)
741 {
742 int brate, framesize, ret;
743
744 switch (format) {
745 case UAC_FORMAT_TYPE_II_AC3:
746 /* FIXME: there is no AC3 format defined yet */
747 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
748 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
749 break;
750 case UAC_FORMAT_TYPE_II_MPEG:
751 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
752 break;
753 default:
754 usb_audio_info(chip,
755 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
756 fp->iface, fp->altsetting, format);
757 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
758 break;
759 }
760
761 fp->channels = 1;
762
763 switch (fp->protocol) {
764 default:
765 case UAC_VERSION_1: {
766 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
767 brate = le16_to_cpu(fmt->wMaxBitRate);
768 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
769 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
770 fp->frame_size = framesize;
771 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
772 break;
773 }
774 case UAC_VERSION_2: {
775 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
776 brate = le16_to_cpu(fmt->wMaxBitRate);
777 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
778 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
779 fp->frame_size = framesize;
780 ret = parse_audio_format_rates_v2v3(chip, fp);
781 break;
782 }
783 }
784
785 return ret;
786 }
787
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)788 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
789 struct audioformat *fp, u64 format,
790 struct uac_format_type_i_continuous_descriptor *fmt,
791 int stream)
792 {
793 int err;
794
795 switch (fmt->bFormatType) {
796 case UAC_FORMAT_TYPE_I:
797 case UAC_FORMAT_TYPE_III:
798 err = parse_audio_format_i(chip, fp, format, fmt);
799 break;
800 case UAC_FORMAT_TYPE_II:
801 err = parse_audio_format_ii(chip, fp, format, fmt);
802 break;
803 default:
804 usb_audio_info(chip,
805 "%u:%d : format type %d is not supported yet\n",
806 fp->iface, fp->altsetting,
807 fmt->bFormatType);
808 return -ENOTSUPP;
809 }
810 fp->fmt_type = fmt->bFormatType;
811 if (err < 0)
812 return err;
813 #if 1
814 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
815 /* extigy apparently supports sample rates other than 48k
816 * but not in ordinary way. so we enable only 48k atm.
817 */
818 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
819 chip->usb_id == USB_ID(0x041e, 0x3020) ||
820 chip->usb_id == USB_ID(0x041e, 0x3061)) {
821 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
822 fp->rates != SNDRV_PCM_RATE_48000 &&
823 fp->rates != SNDRV_PCM_RATE_96000)
824 return -ENOTSUPP;
825 }
826 #endif
827 return 0;
828 }
829
snd_usb_parse_audio_format_v3(struct snd_usb_audio * chip,struct audioformat * fp,struct uac3_as_header_descriptor * as,int stream)830 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
831 struct audioformat *fp,
832 struct uac3_as_header_descriptor *as,
833 int stream)
834 {
835 u64 format = le64_to_cpu(as->bmFormats);
836 int err;
837
838 /*
839 * Type I format bits are D0..D6
840 * This test works because type IV is not supported
841 */
842 if (format & 0x7f)
843 fp->fmt_type = UAC_FORMAT_TYPE_I;
844 else
845 fp->fmt_type = UAC_FORMAT_TYPE_III;
846
847 err = parse_audio_format_i(chip, fp, format, as);
848 if (err < 0)
849 return err;
850
851 return 0;
852 }
853