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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 | int format, void *_fmt, |
47 | int protocol) |
48 | { |
49 | int sample_width, sample_bytes; |
50 | u64 pcm_formats; |
51 | |
52 | switch (protocol) { |
53 | case UAC_VERSION_1: |
54 | default: { |
55 | struct uac_format_type_i_discrete_descriptor *fmt = _fmt; |
56 | sample_width = fmt->bBitResolution; |
57 | sample_bytes = fmt->bSubframeSize; |
58 | format = 1 << format; |
59 | break; |
60 | } |
61 | |
62 | case UAC_VERSION_2: { |
63 | struct uac_format_type_i_ext_descriptor *fmt = _fmt; |
64 | sample_width = fmt->bBitResolution; |
65 | sample_bytes = fmt->bSubslotSize; |
66 | format <<= 1; |
67 | break; |
68 | } |
69 | } |
70 | |
71 | pcm_formats = 0; |
72 | |
73 | if (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED)) { |
74 | /* some devices don't define this correctly... */ |
75 | snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n", |
76 | chip->dev->devnum, fp->iface, fp->altsetting); |
77 | format = 1 << UAC_FORMAT_TYPE_I_PCM; |
78 | } |
79 | if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) { |
80 | if (chip->usb_id == USB_ID(0x0582, 0x0016) /* Edirol SD-90 */ && |
81 | sample_width == 24 && sample_bytes == 2) |
82 | sample_bytes = 3; |
83 | else if (sample_width > sample_bytes * 8) { |
84 | snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n", |
85 | chip->dev->devnum, fp->iface, fp->altsetting, |
86 | sample_width, sample_bytes); |
87 | } |
88 | /* check the format byte size */ |
89 | switch (sample_bytes) { |
90 | case 1: |
91 | pcm_formats |= SNDRV_PCM_FMTBIT_S8; |
92 | break; |
93 | case 2: |
94 | if (snd_usb_is_big_endian_format(chip, fp)) |
95 | pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */ |
96 | else |
97 | pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE; |
98 | break; |
99 | case 3: |
100 | if (snd_usb_is_big_endian_format(chip, fp)) |
101 | pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */ |
102 | else |
103 | pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE; |
104 | break; |
105 | case 4: |
106 | pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE; |
107 | break; |
108 | default: |
109 | snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n", |
110 | chip->dev->devnum, fp->iface, fp->altsetting, |
111 | sample_width, sample_bytes); |
112 | break; |
113 | } |
114 | } |
115 | if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) { |
116 | /* Dallas DS4201 workaround: it advertises U8 format, but really |
117 | supports S8. */ |
118 | if (chip->usb_id == USB_ID(0x04fa, 0x4201)) |
119 | pcm_formats |= SNDRV_PCM_FMTBIT_S8; |
120 | else |
121 | pcm_formats |= SNDRV_PCM_FMTBIT_U8; |
122 | } |
123 | if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) { |
124 | pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE; |
125 | } |
126 | if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) { |
127 | pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW; |
128 | } |
129 | if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) { |
130 | pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW; |
131 | } |
132 | if (format & ~0x3f) { |
133 | snd_printk(KERN_INFO "%d:%u:%d : unsupported format bits %#x\n", |
134 | chip->dev->devnum, fp->iface, fp->altsetting, format); |
135 | } |
136 | return pcm_formats; |
137 | } |
138 | |
139 | |
140 | /* |
141 | * parse the format descriptor and stores the possible sample rates |
142 | * on the audioformat table (audio class v1). |
143 | * |
144 | * @dev: usb device |
145 | * @fp: audioformat record |
146 | * @fmt: the format descriptor |
147 | * @offset: the start offset of descriptor pointing the rate type |
148 | * (7 for type I and II, 8 for type II) |
149 | */ |
150 | static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp, |
151 | unsigned char *fmt, int offset) |
152 | { |
153 | int nr_rates = fmt[offset]; |
154 | |
155 | if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) { |
156 | snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n", |
157 | chip->dev->devnum, fp->iface, fp->altsetting); |
158 | return -1; |
159 | } |
160 | |
161 | if (nr_rates) { |
162 | /* |
163 | * build the rate table and bitmap flags |
164 | */ |
165 | int r, idx; |
166 | |
167 | fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL); |
168 | if (fp->rate_table == NULL) { |
169 | snd_printk(KERN_ERR "cannot malloc\n"); |
170 | return -1; |
171 | } |
172 | |
173 | fp->nr_rates = 0; |
174 | fp->rate_min = fp->rate_max = 0; |
175 | for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) { |
176 | unsigned int rate = combine_triple(&fmt[idx]); |
177 | if (!rate) |
178 | continue; |
179 | /* C-Media CM6501 mislabels its 96 kHz altsetting */ |
180 | /* Terratec Aureon 7.1 USB C-Media 6206, too */ |
181 | if (rate == 48000 && nr_rates == 1 && |
182 | (chip->usb_id == USB_ID(0x0d8c, 0x0201) || |
183 | chip->usb_id == USB_ID(0x0d8c, 0x0102) || |
184 | chip->usb_id == USB_ID(0x0ccd, 0x00b1)) && |
185 | fp->altsetting == 5 && fp->maxpacksize == 392) |
186 | rate = 96000; |
187 | /* Creative VF0470 Live Cam reports 16 kHz instead of 8kHz */ |
188 | if (rate == 16000 && chip->usb_id == USB_ID(0x041e, 0x4068)) |
189 | rate = 8000; |
190 | |
191 | fp->rate_table[fp->nr_rates] = rate; |
192 | if (!fp->rate_min || rate < fp->rate_min) |
193 | fp->rate_min = rate; |
194 | if (!fp->rate_max || rate > fp->rate_max) |
195 | fp->rate_max = rate; |
196 | fp->rates |= snd_pcm_rate_to_rate_bit(rate); |
197 | fp->nr_rates++; |
198 | } |
199 | if (!fp->nr_rates) { |
200 | hwc_debug("All rates were zero. Skipping format!\n"); |
201 | return -1; |
202 | } |
203 | } else { |
204 | /* continuous rates */ |
205 | fp->rates = SNDRV_PCM_RATE_CONTINUOUS; |
206 | fp->rate_min = combine_triple(&fmt[offset + 1]); |
207 | fp->rate_max = combine_triple(&fmt[offset + 4]); |
208 | } |
209 | return 0; |
210 | } |
211 | |
212 | /* |
213 | * Helper function to walk the array of sample rate triplets reported by |
214 | * the device. The problem is that we need to parse whole array first to |
215 | * get to know how many sample rates we have to expect. |
216 | * Then fp->rate_table can be allocated and filled. |
217 | */ |
218 | static int parse_uac2_sample_rate_range(struct audioformat *fp, int nr_triplets, |
219 | const unsigned char *data) |
220 | { |
221 | int i, nr_rates = 0; |
222 | |
223 | fp->rates = fp->rate_min = fp->rate_max = 0; |
224 | |
225 | for (i = 0; i < nr_triplets; i++) { |
226 | int min = combine_quad(&data[2 + 12 * i]); |
227 | int max = combine_quad(&data[6 + 12 * i]); |
228 | int res = combine_quad(&data[10 + 12 * i]); |
229 | int rate; |
230 | |
231 | if ((max < 0) || (min < 0) || (res < 0) || (max < min)) |
232 | continue; |
233 | |
234 | /* |
235 | * for ranges with res == 1, we announce a continuous sample |
236 | * rate range, and this function should return 0 for no further |
237 | * parsing. |
238 | */ |
239 | if (res == 1) { |
240 | fp->rate_min = min; |
241 | fp->rate_max = max; |
242 | fp->rates = SNDRV_PCM_RATE_CONTINUOUS; |
243 | return 0; |
244 | } |
245 | |
246 | for (rate = min; rate <= max; rate += res) { |
247 | if (fp->rate_table) |
248 | fp->rate_table[nr_rates] = rate; |
249 | if (!fp->rate_min || rate < fp->rate_min) |
250 | fp->rate_min = rate; |
251 | if (!fp->rate_max || rate > fp->rate_max) |
252 | fp->rate_max = rate; |
253 | fp->rates |= snd_pcm_rate_to_rate_bit(rate); |
254 | |
255 | nr_rates++; |
256 | |
257 | /* avoid endless loop */ |
258 | if (res == 0) |
259 | break; |
260 | } |
261 | } |
262 | |
263 | return nr_rates; |
264 | } |
265 | |
266 | /* |
267 | * parse the format descriptor and stores the possible sample rates |
268 | * on the audioformat table (audio class v2). |
269 | */ |
270 | static int parse_audio_format_rates_v2(struct snd_usb_audio *chip, |
271 | struct audioformat *fp) |
272 | { |
273 | struct usb_device *dev = chip->dev; |
274 | unsigned char tmp[2], *data; |
275 | int nr_triplets, data_size, ret = 0; |
276 | int clock = snd_usb_clock_find_source(chip, fp->clock); |
277 | |
278 | if (clock < 0) { |
279 | snd_printk(KERN_ERR "%s(): unable to find clock source (clock %d)\n", |
280 | __func__, clock); |
281 | goto err; |
282 | } |
283 | |
284 | /* get the number of sample rates first by only fetching 2 bytes */ |
285 | ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, |
286 | USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
287 | UAC2_CS_CONTROL_SAM_FREQ << 8, |
288 | snd_usb_ctrl_intf(chip) | (clock << 8), |
289 | tmp, sizeof(tmp), 1000); |
290 | |
291 | if (ret < 0) { |
292 | snd_printk(KERN_ERR "%s(): unable to retrieve number of sample rates (clock %d)\n", |
293 | __func__, clock); |
294 | goto err; |
295 | } |
296 | |
297 | nr_triplets = (tmp[1] << 8) | tmp[0]; |
298 | data_size = 2 + 12 * nr_triplets; |
299 | data = kzalloc(data_size, GFP_KERNEL); |
300 | if (!data) { |
301 | ret = -ENOMEM; |
302 | goto err; |
303 | } |
304 | |
305 | /* now get the full information */ |
306 | ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE, |
307 | USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
308 | UAC2_CS_CONTROL_SAM_FREQ << 8, |
309 | snd_usb_ctrl_intf(chip) | (clock << 8), |
310 | data, data_size, 1000); |
311 | |
312 | if (ret < 0) { |
313 | snd_printk(KERN_ERR "%s(): unable to retrieve sample rate range (clock %d)\n", |
314 | __func__, clock); |
315 | ret = -EINVAL; |
316 | goto err_free; |
317 | } |
318 | |
319 | /* Call the triplet parser, and make sure fp->rate_table is NULL. |
320 | * We just use the return value to know how many sample rates we |
321 | * will have to deal with. */ |
322 | kfree(fp->rate_table); |
323 | fp->rate_table = NULL; |
324 | fp->nr_rates = parse_uac2_sample_rate_range(fp, nr_triplets, data); |
325 | |
326 | if (fp->nr_rates == 0) { |
327 | /* SNDRV_PCM_RATE_CONTINUOUS */ |
328 | ret = 0; |
329 | goto err_free; |
330 | } |
331 | |
332 | fp->rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL); |
333 | if (!fp->rate_table) { |
334 | ret = -ENOMEM; |
335 | goto err_free; |
336 | } |
337 | |
338 | /* Call the triplet parser again, but this time, fp->rate_table is |
339 | * allocated, so the rates will be stored */ |
340 | parse_uac2_sample_rate_range(fp, nr_triplets, data); |
341 | |
342 | err_free: |
343 | kfree(data); |
344 | err: |
345 | return ret; |
346 | } |
347 | |
348 | /* |
349 | * parse the format type I and III descriptors |
350 | */ |
351 | static int parse_audio_format_i(struct snd_usb_audio *chip, |
352 | struct audioformat *fp, int format, |
353 | struct uac_format_type_i_continuous_descriptor *fmt, |
354 | struct usb_host_interface *iface) |
355 | { |
356 | struct usb_interface_descriptor *altsd = get_iface_desc(iface); |
357 | int protocol = altsd->bInterfaceProtocol; |
358 | int pcm_format, ret; |
359 | |
360 | if (fmt->bFormatType == UAC_FORMAT_TYPE_III) { |
361 | /* FIXME: the format type is really IECxxx |
362 | * but we give normal PCM format to get the existing |
363 | * apps working... |
364 | */ |
365 | switch (chip->usb_id) { |
366 | |
367 | case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ |
368 | if (chip->setup == 0x00 && |
369 | fp->altsetting == 6) |
370 | pcm_format = SNDRV_PCM_FORMAT_S16_BE; |
371 | else |
372 | pcm_format = SNDRV_PCM_FORMAT_S16_LE; |
373 | break; |
374 | default: |
375 | pcm_format = SNDRV_PCM_FORMAT_S16_LE; |
376 | } |
377 | fp->formats = 1uLL << pcm_format; |
378 | } else { |
379 | fp->formats = parse_audio_format_i_type(chip, fp, format, |
380 | fmt, protocol); |
381 | if (!fp->formats) |
382 | return -1; |
383 | } |
384 | |
385 | /* gather possible sample rates */ |
386 | /* audio class v1 reports possible sample rates as part of the |
387 | * proprietary class specific descriptor. |
388 | * audio class v2 uses class specific EP0 range requests for that. |
389 | */ |
390 | switch (protocol) { |
391 | default: |
392 | snd_printdd(KERN_WARNING "%d:%u:%d : invalid protocol version %d, assuming v1\n", |
393 | chip->dev->devnum, fp->iface, fp->altsetting, protocol); |
394 | /* fall through */ |
395 | case UAC_VERSION_1: |
396 | fp->channels = fmt->bNrChannels; |
397 | ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7); |
398 | break; |
399 | case UAC_VERSION_2: |
400 | /* fp->channels is already set in this case */ |
401 | ret = parse_audio_format_rates_v2(chip, fp); |
402 | break; |
403 | } |
404 | |
405 | if (fp->channels < 1) { |
406 | snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n", |
407 | chip->dev->devnum, fp->iface, fp->altsetting, fp->channels); |
408 | return -1; |
409 | } |
410 | |
411 | return ret; |
412 | } |
413 | |
414 | /* |
415 | * parse the format type II descriptor |
416 | */ |
417 | static int parse_audio_format_ii(struct snd_usb_audio *chip, |
418 | struct audioformat *fp, |
419 | int format, void *_fmt, |
420 | struct usb_host_interface *iface) |
421 | { |
422 | int brate, framesize, ret; |
423 | struct usb_interface_descriptor *altsd = get_iface_desc(iface); |
424 | int protocol = altsd->bInterfaceProtocol; |
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 (protocol) { |
445 | default: |
446 | snd_printdd(KERN_WARNING "%d:%u:%d : invalid protocol version %d, assuming v1\n", |
447 | chip->dev->devnum, fp->iface, fp->altsetting, protocol); |
448 | /* fall through */ |
449 | case UAC_VERSION_1: { |
450 | struct uac_format_type_ii_discrete_descriptor *fmt = _fmt; |
451 | brate = le16_to_cpu(fmt->wMaxBitRate); |
452 | framesize = le16_to_cpu(fmt->wSamplesPerFrame); |
453 | snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); |
454 | fp->frame_size = framesize; |
455 | ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */ |
456 | break; |
457 | } |
458 | case UAC_VERSION_2: { |
459 | struct uac_format_type_ii_ext_descriptor *fmt = _fmt; |
460 | brate = le16_to_cpu(fmt->wMaxBitRate); |
461 | framesize = le16_to_cpu(fmt->wSamplesPerFrame); |
462 | snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); |
463 | fp->frame_size = framesize; |
464 | ret = parse_audio_format_rates_v2(chip, fp); |
465 | break; |
466 | } |
467 | } |
468 | |
469 | return ret; |
470 | } |
471 | |
472 | int snd_usb_parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp, |
473 | int format, struct uac_format_type_i_continuous_descriptor *fmt, |
474 | int stream, struct usb_host_interface *iface) |
475 | { |
476 | int err; |
477 | |
478 | switch (fmt->bFormatType) { |
479 | case UAC_FORMAT_TYPE_I: |
480 | case UAC_FORMAT_TYPE_III: |
481 | err = parse_audio_format_i(chip, fp, format, fmt, iface); |
482 | break; |
483 | case UAC_FORMAT_TYPE_II: |
484 | err = parse_audio_format_ii(chip, fp, format, fmt, iface); |
485 | break; |
486 | default: |
487 | snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n", |
488 | chip->dev->devnum, fp->iface, fp->altsetting, |
489 | fmt->bFormatType); |
490 | return -ENOTSUPP; |
491 | } |
492 | fp->fmt_type = fmt->bFormatType; |
493 | if (err < 0) |
494 | return err; |
495 | #if 1 |
496 | /* FIXME: temporary hack for extigy/audigy 2 nx/zs */ |
497 | /* extigy apparently supports sample rates other than 48k |
498 | * but not in ordinary way. so we enable only 48k atm. |
499 | */ |
500 | if (chip->usb_id == USB_ID(0x041e, 0x3000) || |
501 | chip->usb_id == USB_ID(0x041e, 0x3020) || |
502 | chip->usb_id == USB_ID(0x041e, 0x3061)) { |
503 | if (fmt->bFormatType == UAC_FORMAT_TYPE_I && |
504 | fp->rates != SNDRV_PCM_RATE_48000 && |
505 | fp->rates != SNDRV_PCM_RATE_96000) |
506 | return -ENOTSUPP; |
507 | } |
508 | #endif |
509 | return 0; |
510 | } |
511 | |
512 |
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