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1 | /* |
2 | * This program is free software; you can redistribute it and/or modify |
3 | * it under the terms of the GNU General Public License as published by |
4 | * the Free Software Foundation; either version 2 of the License, or |
5 | * (at your option) any later version. |
6 | * |
7 | * This program is distributed in the hope that it will be useful, |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
10 | * GNU General Public License for more details. |
11 | * |
12 | * You should have received a copy of the GNU General Public License |
13 | * along with this program; if not, write to the Free Software |
14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
15 | * |
16 | */ |
17 | |
18 | #include <linux/init.h> |
19 | #include <linux/slab.h> |
20 | #include <linux/usb.h> |
21 | #include <linux/usb/audio.h> |
22 | #include <linux/usb/audio-v2.h> |
23 | |
24 | #include <sound/core.h> |
25 | #include <sound/pcm.h> |
26 | |
27 | #include "usbaudio.h" |
28 | #include "card.h" |
29 | #include "quirks.h" |
30 | #include "helper.h" |
31 | #include "debug.h" |
32 | #include "clock.h" |
33 | #include "format.h" |
34 | |
35 | /* |
36 | * parse the audio format type I descriptor |
37 | * and returns the corresponding pcm format |
38 | * |
39 | * @dev: usb device |
40 | * @fp: audioformat record |
41 | * @format: the format tag (wFormatTag) |
42 | * @fmt: the format type descriptor |
43 | */ |
44 | static u64 parse_audio_format_i_type(struct snd_usb_audio *chip, |
45 | struct audioformat *fp, |
46 | unsigned int format, void *_fmt) |
47 | { |
48 | int sample_width, sample_bytes; |
49 | u64 pcm_formats = 0; |
50 | |
51 | switch (fp->protocol) { |
52 | case UAC_VERSION_1: |
53 | default: { |
54 | struct uac_format_type_i_discrete_descriptor *fmt = _fmt; |
55 | sample_width = fmt->bBitResolution; |
56 | sample_bytes = fmt->bSubframeSize; |
57 | format = 1 << format; |
58 | break; |
59 | } |
60 | |
61 | case UAC_VERSION_2: { |
62 | struct uac_format_type_i_ext_descriptor *fmt = _fmt; |
63 | sample_width = fmt->bBitResolution; |
64 | sample_bytes = fmt->bSubslotSize; |
65 | |
66 | if (format & UAC2_FORMAT_TYPE_I_RAW_DATA) |
67 | pcm_formats |= SNDRV_PCM_FMTBIT_SPECIAL; |
68 | |
69 | format <<= 1; |
70 | break; |
71 | } |
72 | } |
73 | |
74 | if ((pcm_formats == 0) && |
75 | (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED))) { |
76 | /* some devices don't define this correctly... */ |
77 | snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n", |
78 | chip->dev->devnum, fp->iface, fp->altsetting); |
79 | format = 1 << UAC_FORMAT_TYPE_I_PCM; |
80 | } |
81 | if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) { |
82 | if (chip->usb_id == USB_ID(0x0582, 0x0016) /* Edirol SD-90 */ && |
83 | sample_width == 24 && sample_bytes == 2) |
84 | sample_bytes = 3; |
85 | else if (sample_width > sample_bytes * 8) { |
86 | snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n", |
87 | chip->dev->devnum, fp->iface, fp->altsetting, |
88 | sample_width, sample_bytes); |
89 | } |
90 | /* check the format byte size */ |
91 | switch (sample_bytes) { |
92 | case 1: |
93 | pcm_formats |= SNDRV_PCM_FMTBIT_S8; |
94 | break; |
95 | case 2: |
96 | if (snd_usb_is_big_endian_format(chip, fp)) |
97 | pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */ |
98 | else |
99 | pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE; |
100 | break; |
101 | case 3: |
102 | if (snd_usb_is_big_endian_format(chip, fp)) |
103 | pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */ |
104 | else |
105 | pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE; |
106 | break; |
107 | case 4: |
108 | pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE; |
109 | break; |
110 | default: |
111 | snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n", |
112 | chip->dev->devnum, fp->iface, fp->altsetting, |
113 | sample_width, sample_bytes); |
114 | break; |
115 | } |
116 | } |
117 | if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) { |
118 | /* Dallas DS4201 workaround: it advertises U8 format, but really |
119 | supports S8. */ |
120 | if (chip->usb_id == USB_ID(0x04fa, 0x4201)) |
121 | pcm_formats |= SNDRV_PCM_FMTBIT_S8; |
122 | else |
123 | pcm_formats |= SNDRV_PCM_FMTBIT_U8; |
124 | } |
125 | if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) { |
126 | pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; |
127 | } |
128 | if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) { |
129 | pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW; |
130 | } |
131 | if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) { |
132 | pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW; |
133 | } |
134 | if (format & ~0x3f) { |
135 | snd_printk(KERN_INFO "%d:%u:%d : unsupported format bits %#x\n", |
136 | chip->dev->devnum, fp->iface, fp->altsetting, format); |
137 | } |
138 | |
139 | pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes); |
140 | |
141 | return pcm_formats; |
142 | } |
143 | |
144 | |
145 | /* |
146 | * parse the format descriptor and stores the possible sample rates |
147 | * on the audioformat table (audio class v1). |
148 | * |
149 | * @dev: usb device |
150 | * @fp: audioformat record |
151 | * @fmt: the format descriptor |
152 | * @offset: the start offset of descriptor pointing the rate type |
153 | * (7 for type I and II, 8 for type II) |
154 | */ |
155 | static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp, |
156 | unsigned char *fmt, int offset) |
157 | { |
158 | int nr_rates = fmt[offset]; |
159 | |
160 | if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) { |
161 | snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n", |
162 | chip->dev->devnum, fp->iface, fp->altsetting); |
163 | return -EINVAL; |
164 | } |
165 | |
166 | if (nr_rates) { |
167 | /* |
168 | * build the rate table and bitmap flags |
169 | */ |
170 | int r, idx; |
171 | |
172 | fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL); |
173 | if (fp->rate_table == NULL) { |
174 | snd_printk(KERN_ERR "cannot malloc\n"); |
175 | return -ENOMEM; |
176 | } |
177 | |
178 | fp->nr_rates = 0; |
179 | fp->rate_min = fp->rate_max = 0; |
180 | for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) { |
181 | unsigned int rate = combine_triple(&fmt[idx]); |
182 | if (!rate) |
183 | continue; |
184 | /* C-Media CM6501 mislabels its 96 kHz altsetting */ |
185 | /* Terratec Aureon 7.1 USB C-Media 6206, too */ |
186 | if (rate == 48000 && nr_rates == 1 && |
187 | (chip->usb_id == USB_ID(0x0d8c, 0x0201) || |
188 | chip->usb_id == USB_ID(0x0d8c, 0x0102) || |
189 | chip->usb_id == USB_ID(0x0ccd, 0x00b1)) && |
190 | fp->altsetting == 5 && fp->maxpacksize == 392) |
191 | rate = 96000; |
192 | /* Creative VF0470 Live Cam reports 16 kHz instead of 8kHz */ |
193 | if (rate == 16000 && chip->usb_id == USB_ID(0x041e, 0x4068)) |
194 | rate = 8000; |
195 | |
196 | fp->rate_table[fp->nr_rates] = rate; |
197 | if (!fp->rate_min || rate < fp->rate_min) |
198 | fp->rate_min = rate; |
199 | if (!fp->rate_max || rate > fp->rate_max) |
200 | fp->rate_max = rate; |
201 | fp->rates |= snd_pcm_rate_to_rate_bit(rate); |
202 | fp->nr_rates++; |
203 | } |
204 | if (!fp->nr_rates) { |
205 | hwc_debug("All rates were zero. Skipping format!\n"); |
206 | return -EINVAL; |
207 | } |
208 | } else { |
209 | /* continuous rates */ |
210 | fp->rates = SNDRV_PCM_RATE_CONTINUOUS; |
211 | fp->rate_min = combine_triple(&fmt[offset + 1]); |
212 | fp->rate_max = combine_triple(&fmt[offset + 4]); |
213 | } |
214 | return 0; |
215 | } |
216 | |
217 | /* |
218 | * Helper function to walk the array of sample rate triplets reported by |
219 | * the device. The problem is that we need to parse whole array first to |
220 | * get to know how many sample rates we have to expect. |
221 | * Then fp->rate_table can be allocated and filled. |
222 | */ |
223 | static int parse_uac2_sample_rate_range(struct audioformat *fp, int nr_triplets, |
224 | const unsigned char *data) |
225 | { |
226 | int i, nr_rates = 0; |
227 | |
228 | fp->rates = fp->rate_min = fp->rate_max = 0; |
229 | |
230 | for (i = 0; i < nr_triplets; i++) { |
231 | int min = combine_quad(&data[2 + 12 * i]); |
232 | int max = combine_quad(&data[6 + 12 * i]); |
233 | int res = combine_quad(&data[10 + 12 * i]); |
234 | unsigned int rate; |
235 | |
236 | if ((max < 0) || (min < 0) || (res < 0) || (max < min)) |
237 | continue; |
238 | |
239 | /* |
240 | * for ranges with res == 1, we announce a continuous sample |
241 | * rate range, and this function should return 0 for no further |
242 | * parsing. |
243 | */ |
244 | if (res == 1) { |
245 | fp->rate_min = min; |
246 | fp->rate_max = max; |
247 | fp->rates = SNDRV_PCM_RATE_CONTINUOUS; |
248 | return 0; |
249 | } |
250 | |
251 | for (rate = min; rate <= max; rate += res) { |
252 | if (fp->rate_table) |
253 | fp->rate_table[nr_rates] = rate; |
254 | if (!fp->rate_min || rate < fp->rate_min) |
255 | fp->rate_min = rate; |
256 | if (!fp->rate_max || rate > fp->rate_max) |
257 | fp->rate_max = rate; |
258 | fp->rates |= snd_pcm_rate_to_rate_bit(rate); |
259 | |
260 | nr_rates++; |
261 | if (nr_rates >= MAX_NR_RATES) { |
262 | snd_printk(KERN_ERR "invalid uac2 rates\n"); |
263 | break; |
264 | } |
265 | |
266 | /* avoid endless loop */ |
267 | if (res == 0) |
268 | break; |
269 | } |
270 | } |
271 | |
272 | return nr_rates; |
273 | } |
274 | |
275 | /* |
276 | * parse the format descriptor and stores the possible sample rates |
277 | * on the audioformat table (audio class v2). |
278 | */ |
279 | static int parse_audio_format_rates_v2(struct snd_usb_audio *chip, |
280 | struct audioformat *fp) |
281 | { |
282 | struct usb_device *dev = chip->dev; |
283 | unsigned char tmp[2], *data; |
284 | int nr_triplets, data_size, ret = 0; |
285 | int clock = snd_usb_clock_find_source(chip, fp->clock, false); |
286 | |
287 | if (clock < 0) { |
288 | snd_printk(KERN_ERR "%s(): unable to find clock source (clock %d)\n", |
289 | __func__, clock); |
290 | goto err; |
291 | } |
292 | |
293 | /* get the number of sample rates first by only fetching 2 bytes */ |
294 | ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, |
295 | USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
296 | UAC2_CS_CONTROL_SAM_FREQ << 8, |
297 | snd_usb_ctrl_intf(chip) | (clock << 8), |
298 | tmp, sizeof(tmp)); |
299 | |
300 | if (ret < 0) { |
301 | snd_printk(KERN_ERR "%s(): unable to retrieve number of sample rates (clock %d)\n", |
302 | __func__, clock); |
303 | goto err; |
304 | } |
305 | |
306 | nr_triplets = (tmp[1] << 8) | tmp[0]; |
307 | data_size = 2 + 12 * nr_triplets; |
308 | data = kzalloc(data_size, GFP_KERNEL); |
309 | if (!data) { |
310 | ret = -ENOMEM; |
311 | goto err; |
312 | } |
313 | |
314 | /* now get the full information */ |
315 | ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, |
316 | USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
317 | UAC2_CS_CONTROL_SAM_FREQ << 8, |
318 | snd_usb_ctrl_intf(chip) | (clock << 8), |
319 | data, data_size); |
320 | |
321 | if (ret < 0) { |
322 | snd_printk(KERN_ERR "%s(): unable to retrieve sample rate range (clock %d)\n", |
323 | __func__, clock); |
324 | ret = -EINVAL; |
325 | goto err_free; |
326 | } |
327 | |
328 | /* Call the triplet parser, and make sure fp->rate_table is NULL. |
329 | * We just use the return value to know how many sample rates we |
330 | * will have to deal with. */ |
331 | kfree(fp->rate_table); |
332 | fp->rate_table = NULL; |
333 | fp->nr_rates = parse_uac2_sample_rate_range(fp, nr_triplets, data); |
334 | |
335 | if (fp->nr_rates == 0) { |
336 | /* SNDRV_PCM_RATE_CONTINUOUS */ |
337 | ret = 0; |
338 | goto err_free; |
339 | } |
340 | |
341 | fp->rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL); |
342 | if (!fp->rate_table) { |
343 | ret = -ENOMEM; |
344 | goto err_free; |
345 | } |
346 | |
347 | /* Call the triplet parser again, but this time, fp->rate_table is |
348 | * allocated, so the rates will be stored */ |
349 | parse_uac2_sample_rate_range(fp, nr_triplets, data); |
350 | |
351 | err_free: |
352 | kfree(data); |
353 | err: |
354 | return ret; |
355 | } |
356 | |
357 | /* |
358 | * parse the format type I and III descriptors |
359 | */ |
360 | static int parse_audio_format_i(struct snd_usb_audio *chip, |
361 | struct audioformat *fp, unsigned int format, |
362 | struct uac_format_type_i_continuous_descriptor *fmt) |
363 | { |
364 | snd_pcm_format_t pcm_format; |
365 | int ret; |
366 | |
367 | if (fmt->bFormatType == UAC_FORMAT_TYPE_III) { |
368 | /* FIXME: the format type is really IECxxx |
369 | * but we give normal PCM format to get the existing |
370 | * apps working... |
371 | */ |
372 | switch (chip->usb_id) { |
373 | |
374 | case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ |
375 | if (chip->setup == 0x00 && |
376 | fp->altsetting == 6) |
377 | pcm_format = SNDRV_PCM_FORMAT_S16_BE; |
378 | else |
379 | pcm_format = SNDRV_PCM_FORMAT_S16_LE; |
380 | break; |
381 | default: |
382 | pcm_format = SNDRV_PCM_FORMAT_S16_LE; |
383 | } |
384 | fp->formats = pcm_format_to_bits(pcm_format); |
385 | } else { |
386 | fp->formats = parse_audio_format_i_type(chip, fp, format, fmt); |
387 | if (!fp->formats) |
388 | return -EINVAL; |
389 | } |
390 | |
391 | /* gather possible sample rates */ |
392 | /* audio class v1 reports possible sample rates as part of the |
393 | * proprietary class specific descriptor. |
394 | * audio class v2 uses class specific EP0 range requests for that. |
395 | */ |
396 | switch (fp->protocol) { |
397 | default: |
398 | case UAC_VERSION_1: |
399 | fp->channels = fmt->bNrChannels; |
400 | ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7); |
401 | break; |
402 | case UAC_VERSION_2: |
403 | /* fp->channels is already set in this case */ |
404 | ret = parse_audio_format_rates_v2(chip, fp); |
405 | break; |
406 | } |
407 | |
408 | if (fp->channels < 1) { |
409 | snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n", |
410 | chip->dev->devnum, fp->iface, fp->altsetting, fp->channels); |
411 | return -EINVAL; |
412 | } |
413 | |
414 | return ret; |
415 | } |
416 | |
417 | /* |
418 | * parse the format type II descriptor |
419 | */ |
420 | static int parse_audio_format_ii(struct snd_usb_audio *chip, |
421 | struct audioformat *fp, |
422 | int format, void *_fmt) |
423 | { |
424 | int brate, framesize, ret; |
425 | |
426 | switch (format) { |
427 | case UAC_FORMAT_TYPE_II_AC3: |
428 | /* FIXME: there is no AC3 format defined yet */ |
429 | // fp->formats = SNDRV_PCM_FMTBIT_AC3; |
430 | fp->formats = SNDRV_PCM_FMTBIT_U8; /* temporary hack to receive byte streams */ |
431 | break; |
432 | case UAC_FORMAT_TYPE_II_MPEG: |
433 | fp->formats = SNDRV_PCM_FMTBIT_MPEG; |
434 | break; |
435 | default: |
436 | snd_printd(KERN_INFO "%d:%u:%d : unknown format tag %#x is detected. processed as MPEG.\n", |
437 | chip->dev->devnum, fp->iface, fp->altsetting, format); |
438 | fp->formats = SNDRV_PCM_FMTBIT_MPEG; |
439 | break; |
440 | } |
441 | |
442 | fp->channels = 1; |
443 | |
444 | switch (fp->protocol) { |
445 | default: |
446 | case UAC_VERSION_1: { |
447 | struct uac_format_type_ii_discrete_descriptor *fmt = _fmt; |
448 | brate = le16_to_cpu(fmt->wMaxBitRate); |
449 | framesize = le16_to_cpu(fmt->wSamplesPerFrame); |
450 | snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); |
451 | fp->frame_size = framesize; |
452 | ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */ |
453 | break; |
454 | } |
455 | case UAC_VERSION_2: { |
456 | struct uac_format_type_ii_ext_descriptor *fmt = _fmt; |
457 | brate = le16_to_cpu(fmt->wMaxBitRate); |
458 | framesize = le16_to_cpu(fmt->wSamplesPerFrame); |
459 | snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); |
460 | fp->frame_size = framesize; |
461 | ret = parse_audio_format_rates_v2(chip, fp); |
462 | break; |
463 | } |
464 | } |
465 | |
466 | return ret; |
467 | } |
468 | |
469 | int snd_usb_parse_audio_format(struct snd_usb_audio *chip, |
470 | struct audioformat *fp, unsigned int format, |
471 | struct uac_format_type_i_continuous_descriptor *fmt, |
472 | int stream) |
473 | { |
474 | int err; |
475 | |
476 | switch (fmt->bFormatType) { |
477 | case UAC_FORMAT_TYPE_I: |
478 | case UAC_FORMAT_TYPE_III: |
479 | err = parse_audio_format_i(chip, fp, format, fmt); |
480 | break; |
481 | case UAC_FORMAT_TYPE_II: |
482 | err = parse_audio_format_ii(chip, fp, format, fmt); |
483 | break; |
484 | default: |
485 | snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n", |
486 | chip->dev->devnum, fp->iface, fp->altsetting, |
487 | fmt->bFormatType); |
488 | return -ENOTSUPP; |
489 | } |
490 | fp->fmt_type = fmt->bFormatType; |
491 | if (err < 0) |
492 | return err; |
493 | #if 1 |
494 | /* FIXME: temporary hack for extigy/audigy 2 nx/zs */ |
495 | /* extigy apparently supports sample rates other than 48k |
496 | * but not in ordinary way. so we enable only 48k atm. |
497 | */ |
498 | if (chip->usb_id == USB_ID(0x041e, 0x3000) || |
499 | chip->usb_id == USB_ID(0x041e, 0x3020) || |
500 | chip->usb_id == USB_ID(0x041e, 0x3061)) { |
501 | if (fmt->bFormatType == UAC_FORMAT_TYPE_I && |
502 | fp->rates != SNDRV_PCM_RATE_48000 && |
503 | fp->rates != SNDRV_PCM_RATE_96000) |
504 | return -ENOTSUPP; |
505 | } |
506 | #endif |
507 | return 0; |
508 | } |
509 | |
510 |
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