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 == BIT(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 = BIT(UAC_FORMAT_TYPE_I_PCM);
95 }
96 if (format & BIT(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 & BIT(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 & BIT(UAC_FORMAT_TYPE_I_IEEE_FLOAT))
145 pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
146 if (format & BIT(UAC_FORMAT_TYPE_I_ALAW))
147 pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
148 if (format & BIT(UAC_FORMAT_TYPE_I_MULAW))
149 pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
150 if (format & ~0x3f) {
151 usb_audio_info(chip,
152 "%u:%d : unsupported format bits %#llx\n",
153 fp->iface, fp->altsetting, format);
154 }
155
156 pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
157
158 return pcm_formats;
159 }
160
set_fixed_rate(struct audioformat * fp,int rate,int rate_bits)161 static int set_fixed_rate(struct audioformat *fp, int rate, int rate_bits)
162 {
163 kfree(fp->rate_table);
164 fp->rate_table = kmalloc(sizeof(int), GFP_KERNEL);
165 if (!fp->rate_table)
166 return -ENOMEM;
167 fp->nr_rates = 1;
168 fp->rate_min = rate;
169 fp->rate_max = rate;
170 fp->rates = rate_bits;
171 fp->rate_table[0] = rate;
172 return 0;
173 }
174
175 /* set up rate_min, rate_max and rates from the rate table */
set_rate_table_min_max(struct audioformat * fp)176 static void set_rate_table_min_max(struct audioformat *fp)
177 {
178 unsigned int rate;
179 int i;
180
181 fp->rate_min = INT_MAX;
182 fp->rate_max = 0;
183 fp->rates = 0;
184 for (i = 0; i < fp->nr_rates; i++) {
185 rate = fp->rate_table[i];
186 fp->rate_min = min(fp->rate_min, rate);
187 fp->rate_max = max(fp->rate_max, rate);
188 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
189 }
190 }
191
192 /*
193 * parse the format descriptor and stores the possible sample rates
194 * on the audioformat table (audio class v1).
195 *
196 * @dev: usb device
197 * @fp: audioformat record
198 * @fmt: the format descriptor
199 * @offset: the start offset of descriptor pointing the rate type
200 * (7 for type I and II, 8 for type II)
201 */
parse_audio_format_rates_v1(struct snd_usb_audio * chip,struct audioformat * fp,unsigned char * fmt,int offset)202 static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
203 unsigned char *fmt, int offset)
204 {
205 int nr_rates = fmt[offset];
206
207 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
208 usb_audio_err(chip,
209 "%u:%d : invalid UAC_FORMAT_TYPE desc\n",
210 fp->iface, fp->altsetting);
211 return -EINVAL;
212 }
213
214 if (nr_rates) {
215 /*
216 * build the rate table and bitmap flags
217 */
218 int r, idx;
219
220 fp->rate_table = kmalloc_array(nr_rates, sizeof(int),
221 GFP_KERNEL);
222 if (fp->rate_table == NULL)
223 return -ENOMEM;
224
225 fp->nr_rates = 0;
226 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
227 unsigned int rate = combine_triple(&fmt[idx]);
228 if (!rate)
229 continue;
230 /* C-Media CM6501 mislabels its 96 kHz altsetting */
231 /* Terratec Aureon 7.1 USB C-Media 6206, too */
232 /* Ozone Z90 USB C-Media, too */
233 if (rate == 48000 && nr_rates == 1 &&
234 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
235 chip->usb_id == USB_ID(0x0d8c, 0x0102) ||
236 chip->usb_id == USB_ID(0x0d8c, 0x0078) ||
237 chip->usb_id == USB_ID(0x0ccd, 0x00b1)) &&
238 fp->altsetting == 5 && fp->maxpacksize == 392)
239 rate = 96000;
240 /* Creative VF0420/VF0470 Live Cams report 16 kHz instead of 8kHz */
241 if (rate == 16000 &&
242 (chip->usb_id == USB_ID(0x041e, 0x4064) ||
243 chip->usb_id == USB_ID(0x041e, 0x4068)))
244 rate = 8000;
245
246 fp->rate_table[fp->nr_rates++] = rate;
247 }
248 if (!fp->nr_rates) {
249 usb_audio_info(chip,
250 "%u:%d: All rates were zero\n",
251 fp->iface, fp->altsetting);
252 return -EINVAL;
253 }
254 set_rate_table_min_max(fp);
255 } else {
256 /* continuous rates */
257 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
258 fp->rate_min = combine_triple(&fmt[offset + 1]);
259 fp->rate_max = combine_triple(&fmt[offset + 4]);
260 }
261
262 /* Jabra Evolve 65 headset */
263 if (chip->usb_id == USB_ID(0x0b0e, 0x030b) ||
264 chip->usb_id == USB_ID(0x0b0e, 0x030c)) {
265 /* only 48kHz for playback while keeping 16kHz for capture */
266 if (fp->nr_rates != 1)
267 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
268 }
269
270 return 0;
271 }
272
273
274 /*
275 * Presonus Studio 1810c supports a limited set of sampling
276 * rates per altsetting but reports the full set each time.
277 * If we don't filter out the unsupported rates and attempt
278 * to configure the card, it will hang refusing to do any
279 * further audio I/O until a hard reset is performed.
280 *
281 * The list of supported rates per altsetting (set of available
282 * I/O channels) is described in the owner's manual, section 2.2.
283 */
s1810c_valid_sample_rate(struct audioformat * fp,unsigned int rate)284 static bool s1810c_valid_sample_rate(struct audioformat *fp,
285 unsigned int rate)
286 {
287 switch (fp->altsetting) {
288 case 1:
289 /* All ADAT ports available */
290 return rate <= 48000;
291 case 2:
292 /* Half of ADAT ports available */
293 return (rate == 88200 || rate == 96000);
294 case 3:
295 /* Analog I/O only (no S/PDIF nor ADAT) */
296 return rate >= 176400;
297 default:
298 return false;
299 }
300 return false;
301 }
302
303 /*
304 * Many Focusrite devices supports a limited set of sampling rates per
305 * altsetting. Maximum rate is exposed in the last 4 bytes of Format Type
306 * descriptor which has a non-standard bLength = 10.
307 */
focusrite_valid_sample_rate(struct snd_usb_audio * chip,struct audioformat * fp,unsigned int rate)308 static bool focusrite_valid_sample_rate(struct snd_usb_audio *chip,
309 struct audioformat *fp,
310 unsigned int rate)
311 {
312 struct usb_interface *iface;
313 struct usb_host_interface *alts;
314 unsigned char *fmt;
315 unsigned int max_rate;
316
317 iface = usb_ifnum_to_if(chip->dev, fp->iface);
318 if (!iface)
319 return true;
320
321 alts = &iface->altsetting[fp->altset_idx];
322 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
323 NULL, UAC_FORMAT_TYPE);
324 if (!fmt)
325 return true;
326
327 if (fmt[0] == 10) { /* bLength */
328 max_rate = combine_quad(&fmt[6]);
329
330 /* Validate max rate */
331 if (max_rate != 48000 &&
332 max_rate != 96000 &&
333 max_rate != 192000 &&
334 max_rate != 384000) {
335
336 usb_audio_info(chip,
337 "%u:%d : unexpected max rate: %u\n",
338 fp->iface, fp->altsetting, max_rate);
339
340 return true;
341 }
342
343 return rate <= max_rate;
344 }
345
346 return true;
347 }
348
349 /*
350 * Helper function to walk the array of sample rate triplets reported by
351 * the device. The problem is that we need to parse whole array first to
352 * get to know how many sample rates we have to expect.
353 * Then fp->rate_table can be allocated and filled.
354 */
parse_uac2_sample_rate_range(struct snd_usb_audio * chip,struct audioformat * fp,int nr_triplets,const unsigned char * data)355 static int parse_uac2_sample_rate_range(struct snd_usb_audio *chip,
356 struct audioformat *fp, int nr_triplets,
357 const unsigned char *data)
358 {
359 int i, nr_rates = 0;
360
361 for (i = 0; i < nr_triplets; i++) {
362 int min = combine_quad(&data[2 + 12 * i]);
363 int max = combine_quad(&data[6 + 12 * i]);
364 int res = combine_quad(&data[10 + 12 * i]);
365 unsigned int rate;
366
367 if ((max < 0) || (min < 0) || (res < 0) || (max < min))
368 continue;
369
370 /*
371 * for ranges with res == 1, we announce a continuous sample
372 * rate range, and this function should return 0 for no further
373 * parsing.
374 */
375 if (res == 1) {
376 fp->rate_min = min;
377 fp->rate_max = max;
378 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
379 return 0;
380 }
381
382 for (rate = min; rate <= max; rate += res) {
383
384 /* Filter out invalid rates on Presonus Studio 1810c */
385 if (chip->usb_id == USB_ID(0x194f, 0x010c) &&
386 !s1810c_valid_sample_rate(fp, rate))
387 goto skip_rate;
388 /* Filter out invalid rates on Presonus Studio 1824c */
389 if (chip->usb_id == USB_ID(0x194f, 0x010d) &&
390 !s1810c_valid_sample_rate(fp, rate))
391 goto skip_rate;
392
393 /* Filter out invalid rates on Focusrite devices */
394 if (USB_ID_VENDOR(chip->usb_id) == 0x1235 &&
395 !focusrite_valid_sample_rate(chip, fp, rate))
396 goto skip_rate;
397
398 if (fp->rate_table)
399 fp->rate_table[nr_rates] = rate;
400 nr_rates++;
401 if (nr_rates >= MAX_NR_RATES) {
402 usb_audio_err(chip, "invalid uac2 rates\n");
403 break;
404 }
405
406 skip_rate:
407 /* avoid endless loop */
408 if (res == 0)
409 break;
410 }
411 }
412
413 return nr_rates;
414 }
415
416 /* Line6 Helix series and the Rode Rodecaster Pro don't support the
417 * UAC2_CS_RANGE usb function call. Return a static table of known
418 * clock rates.
419 */
line6_parse_audio_format_rates_quirk(struct snd_usb_audio * chip,struct audioformat * fp)420 static int line6_parse_audio_format_rates_quirk(struct snd_usb_audio *chip,
421 struct audioformat *fp)
422 {
423 switch (chip->usb_id) {
424 case USB_ID(0x0e41, 0x4241): /* Line6 Helix */
425 case USB_ID(0x0e41, 0x4242): /* Line6 Helix Rack */
426 case USB_ID(0x0e41, 0x4244): /* Line6 Helix LT */
427 case USB_ID(0x0e41, 0x4246): /* Line6 HX-Stomp */
428 case USB_ID(0x0e41, 0x4253): /* Line6 HX-Stomp XL */
429 case USB_ID(0x0e41, 0x4247): /* Line6 Pod Go */
430 case USB_ID(0x0e41, 0x4248): /* Line6 Helix >= fw 2.82 */
431 case USB_ID(0x0e41, 0x4249): /* Line6 Helix Rack >= fw 2.82 */
432 case USB_ID(0x0e41, 0x424a): /* Line6 Helix LT >= fw 2.82 */
433 case USB_ID(0x0e41, 0x424b): /* Line6 Pod Go */
434 case USB_ID(0x19f7, 0x0011): /* Rode Rodecaster Pro */
435 return set_fixed_rate(fp, 48000, SNDRV_PCM_RATE_48000);
436 }
437
438 return -ENODEV;
439 }
440
441 /* 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)442 static bool check_valid_altsetting_v2v3(struct snd_usb_audio *chip, int iface,
443 int altsetting)
444 {
445 struct usb_device *dev = chip->dev;
446 __le64 raw_data = 0;
447 u64 data;
448 int err;
449
450 /* we assume 64bit is enough for any altsettings */
451 if (snd_BUG_ON(altsetting >= 64 - 8))
452 return false;
453
454 err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
455 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
456 UAC2_AS_VAL_ALT_SETTINGS << 8,
457 iface, &raw_data, sizeof(raw_data));
458 if (err < 0)
459 return false;
460
461 data = le64_to_cpu(raw_data);
462 /* first byte contains the bitmap size */
463 if ((data & 0xff) * 8 < altsetting)
464 return false;
465 if (data & (1ULL << (altsetting + 8)))
466 return true;
467
468 return false;
469 }
470
471 /*
472 * Validate each sample rate with the altsetting
473 * Rebuild the rate table if only partial values are valid
474 */
validate_sample_rate_table_v2v3(struct snd_usb_audio * chip,struct audioformat * fp,int clock)475 static int validate_sample_rate_table_v2v3(struct snd_usb_audio *chip,
476 struct audioformat *fp,
477 int clock)
478 {
479 struct usb_device *dev = chip->dev;
480 struct usb_host_interface *alts;
481 unsigned int *table;
482 unsigned int nr_rates;
483 int i, err;
484 u32 bmControls;
485
486 /* performing the rate verification may lead to unexpected USB bus
487 * behavior afterwards by some unknown reason. Do this only for the
488 * known devices.
489 */
490 if (!(chip->quirk_flags & QUIRK_FLAG_VALIDATE_RATES))
491 return 0; /* don't perform the validation as default */
492
493 alts = snd_usb_get_host_interface(chip, fp->iface, fp->altsetting);
494 if (!alts)
495 return 0;
496
497 if (fp->protocol == UAC_VERSION_3) {
498 struct uac3_as_header_descriptor *as = snd_usb_find_csint_desc(
499 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
500 bmControls = le32_to_cpu(as->bmControls);
501 } else {
502 struct uac2_as_header_descriptor *as = snd_usb_find_csint_desc(
503 alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
504 bmControls = as->bmControls;
505 }
506
507 if (!uac_v2v3_control_is_readable(bmControls,
508 UAC2_AS_VAL_ALT_SETTINGS))
509 return 0;
510
511 table = kcalloc(fp->nr_rates, sizeof(*table), GFP_KERNEL);
512 if (!table)
513 return -ENOMEM;
514
515 /* clear the interface altsetting at first */
516 usb_set_interface(dev, fp->iface, 0);
517
518 nr_rates = 0;
519 for (i = 0; i < fp->nr_rates; i++) {
520 err = snd_usb_set_sample_rate_v2v3(chip, fp, clock,
521 fp->rate_table[i]);
522 if (err < 0)
523 continue;
524
525 if (check_valid_altsetting_v2v3(chip, fp->iface, fp->altsetting))
526 table[nr_rates++] = fp->rate_table[i];
527 }
528
529 if (!nr_rates) {
530 usb_audio_dbg(chip,
531 "No valid sample rate available for %d:%d, assuming a firmware bug\n",
532 fp->iface, fp->altsetting);
533 nr_rates = fp->nr_rates; /* continue as is */
534 }
535
536 if (fp->nr_rates == nr_rates) {
537 kfree(table);
538 return 0;
539 }
540
541 kfree(fp->rate_table);
542 fp->rate_table = table;
543 fp->nr_rates = nr_rates;
544 return 0;
545 }
546
547 /*
548 * parse the format descriptor and stores the possible sample rates
549 * on the audioformat table (audio class v2 and v3).
550 */
parse_audio_format_rates_v2v3(struct snd_usb_audio * chip,struct audioformat * fp)551 static int parse_audio_format_rates_v2v3(struct snd_usb_audio *chip,
552 struct audioformat *fp)
553 {
554 struct usb_device *dev = chip->dev;
555 unsigned char tmp[2], *data;
556 int nr_triplets, data_size, ret = 0, ret_l6;
557 int clock = snd_usb_clock_find_source(chip, fp, false);
558 struct usb_host_interface *ctrl_intf;
559
560 ctrl_intf = snd_usb_find_ctrl_interface(chip, fp->iface);
561 if (clock < 0) {
562 dev_err(&dev->dev,
563 "%s(): unable to find clock source (clock %d)\n",
564 __func__, clock);
565 goto err;
566 }
567
568 /* get the number of sample rates first by only fetching 2 bytes */
569 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
570 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
571 UAC2_CS_CONTROL_SAM_FREQ << 8,
572 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8),
573 tmp, sizeof(tmp));
574
575 if (ret < 0) {
576 /* line6 helix devices don't support UAC2_CS_CONTROL_SAM_FREQ call */
577 ret_l6 = line6_parse_audio_format_rates_quirk(chip, fp);
578 if (ret_l6 == -ENODEV) {
579 /* no line6 device found continue showing the error */
580 dev_err(&dev->dev,
581 "%s(): unable to retrieve number of sample rates (clock %d)\n",
582 __func__, clock);
583 goto err;
584 }
585 if (ret_l6 == 0) {
586 dev_info(&dev->dev,
587 "%s(): unable to retrieve number of sample rates: set it to a predefined value (clock %d).\n",
588 __func__, clock);
589 return 0;
590 }
591 ret = ret_l6;
592 goto err;
593 }
594
595 nr_triplets = (tmp[1] << 8) | tmp[0];
596 data_size = 2 + 12 * nr_triplets;
597 data = kzalloc(data_size, GFP_KERNEL);
598 if (!data) {
599 ret = -ENOMEM;
600 goto err;
601 }
602
603 /* now get the full information */
604 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
605 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
606 UAC2_CS_CONTROL_SAM_FREQ << 8,
607 snd_usb_ctrl_intf(ctrl_intf) | (clock << 8),
608 data, data_size);
609
610 if (ret < 0) {
611 dev_err(&dev->dev,
612 "%s(): unable to retrieve sample rate range (clock %d)\n",
613 __func__, clock);
614 ret = -EINVAL;
615 goto err_free;
616 }
617
618 /* Call the triplet parser, and make sure fp->rate_table is NULL.
619 * We just use the return value to know how many sample rates we
620 * will have to deal with. */
621 kfree(fp->rate_table);
622 fp->rate_table = NULL;
623 fp->nr_rates = parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
624
625 if (fp->nr_rates == 0) {
626 /* SNDRV_PCM_RATE_CONTINUOUS */
627 ret = 0;
628 goto err_free;
629 }
630
631 fp->rate_table = kmalloc_array(fp->nr_rates, sizeof(int), GFP_KERNEL);
632 if (!fp->rate_table) {
633 ret = -ENOMEM;
634 goto err_free;
635 }
636
637 /* Call the triplet parser again, but this time, fp->rate_table is
638 * allocated, so the rates will be stored */
639 parse_uac2_sample_rate_range(chip, fp, nr_triplets, data);
640
641 ret = validate_sample_rate_table_v2v3(chip, fp, clock);
642 if (ret < 0)
643 goto err_free;
644
645 set_rate_table_min_max(fp);
646
647 err_free:
648 kfree(data);
649 err:
650 return ret;
651 }
652
653 /*
654 * parse the format type I and III descriptors
655 */
parse_audio_format_i(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)656 static int parse_audio_format_i(struct snd_usb_audio *chip,
657 struct audioformat *fp, u64 format,
658 void *_fmt)
659 {
660 snd_pcm_format_t pcm_format;
661 unsigned int fmt_type;
662 int ret;
663
664 switch (fp->protocol) {
665 default:
666 case UAC_VERSION_1:
667 case UAC_VERSION_2: {
668 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
669
670 fmt_type = fmt->bFormatType;
671 break;
672 }
673 case UAC_VERSION_3: {
674 /* fp->fmt_type is already set in this case */
675 fmt_type = fp->fmt_type;
676 break;
677 }
678 }
679
680 if (fmt_type == UAC_FORMAT_TYPE_III) {
681 /* FIXME: the format type is really IECxxx
682 * but we give normal PCM format to get the existing
683 * apps working...
684 */
685 switch (chip->usb_id) {
686
687 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
688 if (chip->setup == 0x00 &&
689 fp->altsetting == 6)
690 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
691 else
692 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
693 break;
694 default:
695 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
696 }
697 fp->formats = pcm_format_to_bits(pcm_format);
698 } else {
699 fp->formats = parse_audio_format_i_type(chip, fp, format, _fmt);
700 if (!fp->formats)
701 return -EINVAL;
702 }
703
704 /* gather possible sample rates */
705 /* audio class v1 reports possible sample rates as part of the
706 * proprietary class specific descriptor.
707 * audio class v2 uses class specific EP0 range requests for that.
708 */
709 switch (fp->protocol) {
710 default:
711 case UAC_VERSION_1: {
712 struct uac_format_type_i_continuous_descriptor *fmt = _fmt;
713
714 fp->channels = fmt->bNrChannels;
715 ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
716 break;
717 }
718 case UAC_VERSION_2:
719 case UAC_VERSION_3: {
720 /* fp->channels is already set in this case */
721 ret = parse_audio_format_rates_v2v3(chip, fp);
722 break;
723 }
724 }
725
726 if (fp->channels < 1) {
727 usb_audio_err(chip,
728 "%u:%d : invalid channels %d\n",
729 fp->iface, fp->altsetting, fp->channels);
730 return -EINVAL;
731 }
732
733 return ret;
734 }
735
736 /*
737 * parse the format type II descriptor
738 */
parse_audio_format_ii(struct snd_usb_audio * chip,struct audioformat * fp,u64 format,void * _fmt)739 static int parse_audio_format_ii(struct snd_usb_audio *chip,
740 struct audioformat *fp,
741 u64 format, void *_fmt)
742 {
743 int brate, framesize, ret;
744
745 switch (format) {
746 case UAC_FORMAT_TYPE_II_AC3:
747 /* FIXME: there is no AC3 format defined yet */
748 // fp->formats = SNDRV_PCM_FMTBIT_AC3;
749 fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */
750 break;
751 case UAC_FORMAT_TYPE_II_MPEG:
752 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
753 break;
754 default:
755 usb_audio_info(chip,
756 "%u:%d : unknown format tag %#llx is detected. processed as MPEG.\n",
757 fp->iface, fp->altsetting, format);
758 fp->formats = SNDRV_PCM_FMTBIT_MPEG;
759 break;
760 }
761
762 fp->channels = 1;
763
764 switch (fp->protocol) {
765 default:
766 case UAC_VERSION_1: {
767 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
768 brate = le16_to_cpu(fmt->wMaxBitRate);
769 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
770 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
771 fp->frame_size = framesize;
772 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
773 break;
774 }
775 case UAC_VERSION_2: {
776 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
777 brate = le16_to_cpu(fmt->wMaxBitRate);
778 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
779 usb_audio_info(chip, "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
780 fp->frame_size = framesize;
781 ret = parse_audio_format_rates_v2v3(chip, fp);
782 break;
783 }
784 }
785
786 return ret;
787 }
788
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)789 int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
790 struct audioformat *fp, u64 format,
791 struct uac_format_type_i_continuous_descriptor *fmt,
792 int stream)
793 {
794 int err;
795
796 switch (fmt->bFormatType) {
797 case UAC_FORMAT_TYPE_I:
798 case UAC_FORMAT_TYPE_III:
799 err = parse_audio_format_i(chip, fp, format, fmt);
800 break;
801 case UAC_FORMAT_TYPE_II:
802 err = parse_audio_format_ii(chip, fp, format, fmt);
803 break;
804 default:
805 usb_audio_info(chip,
806 "%u:%d : format type %d is not supported yet\n",
807 fp->iface, fp->altsetting,
808 fmt->bFormatType);
809 return -ENOTSUPP;
810 }
811 fp->fmt_type = fmt->bFormatType;
812 if (err < 0)
813 return err;
814 #if 1
815 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
816 /* extigy apparently supports sample rates other than 48k
817 * but not in ordinary way. so we enable only 48k atm.
818 */
819 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
820 chip->usb_id == USB_ID(0x041e, 0x3020) ||
821 chip->usb_id == USB_ID(0x041e, 0x3061)) {
822 if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
823 fp->rates != SNDRV_PCM_RATE_48000 &&
824 fp->rates != SNDRV_PCM_RATE_96000)
825 return -ENOTSUPP;
826 }
827 #endif
828 return 0;
829 }
830
snd_usb_parse_audio_format_v3(struct snd_usb_audio * chip,struct audioformat * fp,struct uac3_as_header_descriptor * as,int stream)831 int snd_usb_parse_audio_format_v3(struct snd_usb_audio *chip,
832 struct audioformat *fp,
833 struct uac3_as_header_descriptor *as,
834 int stream)
835 {
836 u64 format = le64_to_cpu(as->bmFormats);
837 int err;
838
839 /*
840 * Type I format bits are D0..D6
841 * This test works because type IV is not supported
842 */
843 if (format & 0x7f)
844 fp->fmt_type = UAC_FORMAT_TYPE_I;
845 else
846 fp->fmt_type = UAC_FORMAT_TYPE_III;
847
848 err = parse_audio_format_i(chip, fp, format, as);
849 if (err < 0)
850 return err;
851
852 return 0;
853 }
854