aboutsummaryrefslogtreecommitdiffstats
path: root/sound/usb/format.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/usb/format.c')
-rw-r--r--sound/usb/format.c445
1 files changed, 445 insertions, 0 deletions
diff --git a/sound/usb/format.c b/sound/usb/format.c
new file mode 100644
index 000000000000..cbfe0c23dbd6
--- /dev/null
+++ b/sound/usb/format.c
@@ -0,0 +1,445 @@
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/usb.h>
20#include <linux/usb/audio.h>
21
22#include <sound/core.h>
23#include <sound/pcm.h>
24
25#include "usbaudio.h"
26#include "card.h"
27#include "quirks.h"
28#include "helper.h"
29#include "debug.h"
30
31/*
32 * parse the audio format type I descriptor
33 * and returns the corresponding pcm format
34 *
35 * @dev: usb device
36 * @fp: audioformat record
37 * @format: the format tag (wFormatTag)
38 * @fmt: the format type descriptor
39 */
40static int parse_audio_format_i_type(struct snd_usb_audio *chip,
41 struct audioformat *fp,
42 int format, void *_fmt,
43 int protocol)
44{
45 int pcm_format, i;
46 int sample_width, sample_bytes;
47
48 switch (protocol) {
49 case UAC_VERSION_1: {
50 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
51 sample_width = fmt->bBitResolution;
52 sample_bytes = fmt->bSubframeSize;
53 break;
54 }
55
56 case UAC_VERSION_2: {
57 struct uac_format_type_i_ext_descriptor *fmt = _fmt;
58 sample_width = fmt->bBitResolution;
59 sample_bytes = fmt->bSubslotSize;
60
61 /*
62 * FIXME
63 * USB audio class v2 devices specify a bitmap of possible
64 * audio formats rather than one fix value. For now, we just
65 * pick one of them and report that as the only possible
66 * value for this setting.
67 * The bit allocation map is in fact compatible to the
68 * wFormatTag of the v1 AS streaming descriptors, which is why
69 * we can simply map the matrix.
70 */
71
72 for (i = 0; i < 5; i++)
73 if (format & (1UL << i)) {
74 format = i + 1;
75 break;
76 }
77
78 break;
79 }
80
81 default:
82 return -EINVAL;
83 }
84
85 /* FIXME: correct endianess and sign? */
86 pcm_format = -1;
87
88 switch (format) {
89 case UAC_FORMAT_TYPE_I_UNDEFINED: /* some devices don't define this correctly... */
90 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
91 chip->dev->devnum, fp->iface, fp->altsetting);
92 /* fall-through */
93 case UAC_FORMAT_TYPE_I_PCM:
94 if (sample_width > sample_bytes * 8) {
95 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
96 chip->dev->devnum, fp->iface, fp->altsetting,
97 sample_width, sample_bytes);
98 }
99 /* check the format byte size */
100 switch (sample_bytes) {
101 case 1:
102 pcm_format = SNDRV_PCM_FORMAT_S8;
103 break;
104 case 2:
105 if (snd_usb_is_big_endian_format(chip, fp))
106 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
107 else
108 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
109 break;
110 case 3:
111 if (snd_usb_is_big_endian_format(chip, fp))
112 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
113 else
114 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
115 break;
116 case 4:
117 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
118 break;
119 default:
120 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
121 chip->dev->devnum, fp->iface, fp->altsetting,
122 sample_width, sample_bytes);
123 break;
124 }
125 break;
126 case UAC_FORMAT_TYPE_I_PCM8:
127 pcm_format = SNDRV_PCM_FORMAT_U8;
128
129 /* Dallas DS4201 workaround: it advertises U8 format, but really
130 supports S8. */
131 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
132 pcm_format = SNDRV_PCM_FORMAT_S8;
133 break;
134 case UAC_FORMAT_TYPE_I_IEEE_FLOAT:
135 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
136 break;
137 case UAC_FORMAT_TYPE_I_ALAW:
138 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
139 break;
140 case UAC_FORMAT_TYPE_I_MULAW:
141 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
142 break;
143 default:
144 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
145 chip->dev->devnum, fp->iface, fp->altsetting, format);
146 break;
147 }
148 return pcm_format;
149}
150
151
152/*
153 * parse the format descriptor and stores the possible sample rates
154 * on the audioformat table (audio class v1).
155 *
156 * @dev: usb device
157 * @fp: audioformat record
158 * @fmt: the format descriptor
159 * @offset: the start offset of descriptor pointing the rate type
160 * (7 for type I and II, 8 for type II)
161 */
162static int parse_audio_format_rates_v1(struct snd_usb_audio *chip, struct audioformat *fp,
163 unsigned char *fmt, int offset)
164{
165 int nr_rates = fmt[offset];
166
167 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
168 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
169 chip->dev->devnum, fp->iface, fp->altsetting);
170 return -1;
171 }
172
173 if (nr_rates) {
174 /*
175 * build the rate table and bitmap flags
176 */
177 int r, idx;
178
179 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
180 if (fp->rate_table == NULL) {
181 snd_printk(KERN_ERR "cannot malloc\n");
182 return -1;
183 }
184
185 fp->nr_rates = 0;
186 fp->rate_min = fp->rate_max = 0;
187 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
188 unsigned int rate = combine_triple(&fmt[idx]);
189 if (!rate)
190 continue;
191 /* C-Media CM6501 mislabels its 96 kHz altsetting */
192 if (rate == 48000 && nr_rates == 1 &&
193 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
194 chip->usb_id == USB_ID(0x0d8c, 0x0102)) &&
195 fp->altsetting == 5 && fp->maxpacksize == 392)
196 rate = 96000;
197 /* Creative VF0470 Live Cam reports 16 kHz instead of 8kHz */
198 if (rate == 16000 && chip->usb_id == USB_ID(0x041e, 0x4068))
199 rate = 8000;
200
201 fp->rate_table[fp->nr_rates] = rate;
202 if (!fp->rate_min || rate < fp->rate_min)
203 fp->rate_min = rate;
204 if (!fp->rate_max || rate > fp->rate_max)
205 fp->rate_max = rate;
206 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
207 fp->nr_rates++;
208 }
209 if (!fp->nr_rates) {
210 hwc_debug("All rates were zero. Skipping format!\n");
211 return -1;
212 }
213 } else {
214 /* continuous rates */
215 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
216 fp->rate_min = combine_triple(&fmt[offset + 1]);
217 fp->rate_max = combine_triple(&fmt[offset + 4]);
218 }
219 return 0;
220}
221
222/*
223 * parse the format descriptor and stores the possible sample rates
224 * on the audioformat table (audio class v2).
225 */
226static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
227 struct audioformat *fp,
228 struct usb_host_interface *iface)
229{
230 struct usb_device *dev = chip->dev;
231 unsigned char tmp[2], *data;
232 int i, nr_rates, data_size, ret = 0;
233
234 /* get the number of sample rates first by only fetching 2 bytes */
235 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
236 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
237 0x0100, chip->clock_id << 8, tmp, sizeof(tmp), 1000);
238
239 if (ret < 0) {
240 snd_printk(KERN_ERR "unable to retrieve number of sample rates\n");
241 goto err;
242 }
243
244 nr_rates = (tmp[1] << 8) | tmp[0];
245 data_size = 2 + 12 * nr_rates;
246 data = kzalloc(data_size, GFP_KERNEL);
247 if (!data) {
248 ret = -ENOMEM;
249 goto err;
250 }
251
252 /* now get the full information */
253 ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
254 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
255 0x0100, chip->clock_id << 8, data, data_size, 1000);
256
257 if (ret < 0) {
258 snd_printk(KERN_ERR "unable to retrieve sample rate range\n");
259 ret = -EINVAL;
260 goto err_free;
261 }
262
263 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
264 if (!fp->rate_table) {
265 ret = -ENOMEM;
266 goto err_free;
267 }
268
269 fp->nr_rates = 0;
270 fp->rate_min = fp->rate_max = 0;
271
272 for (i = 0; i < nr_rates; i++) {
273 int rate = combine_quad(&data[2 + 12 * i]);
274
275 fp->rate_table[fp->nr_rates] = rate;
276 if (!fp->rate_min || rate < fp->rate_min)
277 fp->rate_min = rate;
278 if (!fp->rate_max || rate > fp->rate_max)
279 fp->rate_max = rate;
280 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
281 fp->nr_rates++;
282 }
283
284err_free:
285 kfree(data);
286err:
287 return ret;
288}
289
290/*
291 * parse the format type I and III descriptors
292 */
293static int parse_audio_format_i(struct snd_usb_audio *chip,
294 struct audioformat *fp,
295 int format, void *_fmt,
296 struct usb_host_interface *iface)
297{
298 struct usb_interface_descriptor *altsd = get_iface_desc(iface);
299 struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
300 int protocol = altsd->bInterfaceProtocol;
301 int pcm_format, ret;
302
303 if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
304 /* FIXME: the format type is really IECxxx
305 * but we give normal PCM format to get the existing
306 * apps working...
307 */
308 switch (chip->usb_id) {
309
310 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
311 if (chip->setup == 0x00 &&
312 fp->altsetting == 6)
313 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
314 else
315 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
316 break;
317 default:
318 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
319 }
320 } else {
321 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt, protocol);
322 if (pcm_format < 0)
323 return -1;
324 }
325
326 fp->format = pcm_format;
327
328 /* gather possible sample rates */
329 /* audio class v1 reports possible sample rates as part of the
330 * proprietary class specific descriptor.
331 * audio class v2 uses class specific EP0 range requests for that.
332 */
333 switch (protocol) {
334 case UAC_VERSION_1:
335 fp->channels = fmt->bNrChannels;
336 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 7);
337 break;
338 case UAC_VERSION_2:
339 /* fp->channels is already set in this case */
340 ret = parse_audio_format_rates_v2(chip, fp, iface);
341 break;
342 }
343
344 if (fp->channels < 1) {
345 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
346 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
347 return -1;
348 }
349
350 return ret;
351}
352
353/*
354 * parse the format type II descriptor
355 */
356static int parse_audio_format_ii(struct snd_usb_audio *chip,
357 struct audioformat *fp,
358 int format, void *_fmt,
359 struct usb_host_interface *iface)
360{
361 int brate, framesize, ret;
362 struct usb_interface_descriptor *altsd = get_iface_desc(iface);
363 int protocol = altsd->bInterfaceProtocol;
364
365 switch (format) {
366 case UAC_FORMAT_TYPE_II_AC3:
367 /* FIXME: there is no AC3 format defined yet */
368 // fp->format = SNDRV_PCM_FORMAT_AC3;
369 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
370 break;
371 case UAC_FORMAT_TYPE_II_MPEG:
372 fp->format = SNDRV_PCM_FORMAT_MPEG;
373 break;
374 default:
375 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag %#x is detected. processed as MPEG.\n",
376 chip->dev->devnum, fp->iface, fp->altsetting, format);
377 fp->format = SNDRV_PCM_FORMAT_MPEG;
378 break;
379 }
380
381 fp->channels = 1;
382
383 switch (protocol) {
384 case UAC_VERSION_1: {
385 struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
386 brate = le16_to_cpu(fmt->wMaxBitRate);
387 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
388 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
389 fp->frame_size = framesize;
390 ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
391 break;
392 }
393 case UAC_VERSION_2: {
394 struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
395 brate = le16_to_cpu(fmt->wMaxBitRate);
396 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
397 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
398 fp->frame_size = framesize;
399 ret = parse_audio_format_rates_v2(chip, fp, iface);
400 break;
401 }
402 }
403
404 return ret;
405}
406
407int snd_usb_parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
408 int format, unsigned char *fmt, int stream,
409 struct usb_host_interface *iface)
410{
411 int err;
412
413 switch (fmt[3]) {
414 case UAC_FORMAT_TYPE_I:
415 case UAC_FORMAT_TYPE_III:
416 err = parse_audio_format_i(chip, fp, format, fmt, iface);
417 break;
418 case UAC_FORMAT_TYPE_II:
419 err = parse_audio_format_ii(chip, fp, format, fmt, iface);
420 break;
421 default:
422 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
423 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
424 return -1;
425 }
426 fp->fmt_type = fmt[3];
427 if (err < 0)
428 return err;
429#if 1
430 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
431 /* extigy apparently supports sample rates other than 48k
432 * but not in ordinary way. so we enable only 48k atm.
433 */
434 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
435 chip->usb_id == USB_ID(0x041e, 0x3020) ||
436 chip->usb_id == USB_ID(0x041e, 0x3061)) {
437 if (fmt[3] == UAC_FORMAT_TYPE_I &&
438 fp->rates != SNDRV_PCM_RATE_48000 &&
439 fp->rates != SNDRV_PCM_RATE_96000)
440 return -1;
441 }
442#endif
443 return 0;
444}
445
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-18 06:43:14 -0500