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-rw-r--r--sound/usb/Makefile1
-rw-r--r--sound/usb/card.c3
-rw-r--r--sound/usb/endpoint.c433
-rw-r--r--sound/usb/endpoint.h7
-rw-r--r--sound/usb/quirks.c7
-rw-r--r--sound/usb/stream.c453
-rw-r--r--sound/usb/stream.h12
7 files changed, 472 insertions, 444 deletions
diff --git a/sound/usb/Makefile b/sound/usb/Makefile
index 083501e78f34..5390db00e098 100644
--- a/sound/usb/Makefile
+++ b/sound/usb/Makefile
@@ -12,6 +12,7 @@ snd-usb-audio-objs := card.o \
12 pcm.o \ 12 pcm.o \
13 proc.o \ 13 proc.o \
14 quirks.o \ 14 quirks.o \
15 stream.o \
15 urb.o 16 urb.o
16 17
17snd-usbmidi-lib-objs := midi.o 18snd-usbmidi-lib-objs := midi.o
diff --git a/sound/usb/card.c b/sound/usb/card.c
index 781d9e61adfb..a3136afb2198 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -68,6 +68,7 @@
68#include "urb.h" 68#include "urb.h"
69#include "format.h" 69#include "format.h"
70#include "power.h" 70#include "power.h"
71#include "stream.h"
71 72
72MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); 73MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
73MODULE_DESCRIPTION("USB Audio"); 74MODULE_DESCRIPTION("USB Audio");
@@ -185,7 +186,7 @@ static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int int
185 return -EINVAL; 186 return -EINVAL;
186 } 187 }
187 188
188 if (! snd_usb_parse_audio_endpoints(chip, interface)) { 189 if (! snd_usb_parse_audio_interface(chip, interface)) {
189 usb_set_interface(dev, interface, 0); /* reset the current interface */ 190 usb_set_interface(dev, interface, 0); /* reset the current interface */
190 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); 191 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
191 return -EINVAL; 192 return -EINVAL;
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 7d46e482375d..b3ee7cf243df 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -15,436 +15,3 @@
15 * 15 *
16 */ 16 */
17 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 "proc.h"
30#include "quirks.h"
31#include "endpoint.h"
32#include "urb.h"
33#include "pcm.h"
34#include "helper.h"
35#include "format.h"
36#include "clock.h"
37
38/*
39 * free a substream
40 */
41static void free_substream(struct snd_usb_substream *subs)
42{
43 struct list_head *p, *n;
44
45 if (!subs->num_formats)
46 return; /* not initialized */
47 list_for_each_safe(p, n, &subs->fmt_list) {
48 struct audioformat *fp = list_entry(p, struct audioformat, list);
49 kfree(fp->rate_table);
50 kfree(fp);
51 }
52 kfree(subs->rate_list.list);
53}
54
55
56/*
57 * free a usb stream instance
58 */
59static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
60{
61 free_substream(&stream->substream[0]);
62 free_substream(&stream->substream[1]);
63 list_del(&stream->list);
64 kfree(stream);
65}
66
67static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
68{
69 struct snd_usb_stream *stream = pcm->private_data;
70 if (stream) {
71 stream->pcm = NULL;
72 snd_usb_audio_stream_free(stream);
73 }
74}
75
76
77/*
78 * add this endpoint to the chip instance.
79 * if a stream with the same endpoint already exists, append to it.
80 * if not, create a new pcm stream.
81 */
82int snd_usb_add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
83{
84 struct list_head *p;
85 struct snd_usb_stream *as;
86 struct snd_usb_substream *subs;
87 struct snd_pcm *pcm;
88 int err;
89
90 list_for_each(p, &chip->pcm_list) {
91 as = list_entry(p, struct snd_usb_stream, list);
92 if (as->fmt_type != fp->fmt_type)
93 continue;
94 subs = &as->substream[stream];
95 if (!subs->endpoint)
96 continue;
97 if (subs->endpoint == fp->endpoint) {
98 list_add_tail(&fp->list, &subs->fmt_list);
99 subs->num_formats++;
100 subs->formats |= fp->formats;
101 return 0;
102 }
103 }
104 /* look for an empty stream */
105 list_for_each(p, &chip->pcm_list) {
106 as = list_entry(p, struct snd_usb_stream, list);
107 if (as->fmt_type != fp->fmt_type)
108 continue;
109 subs = &as->substream[stream];
110 if (subs->endpoint)
111 continue;
112 err = snd_pcm_new_stream(as->pcm, stream, 1);
113 if (err < 0)
114 return err;
115 snd_usb_init_substream(as, stream, fp);
116 return 0;
117 }
118
119 /* create a new pcm */
120 as = kzalloc(sizeof(*as), GFP_KERNEL);
121 if (!as)
122 return -ENOMEM;
123 as->pcm_index = chip->pcm_devs;
124 as->chip = chip;
125 as->fmt_type = fp->fmt_type;
126 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
127 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
128 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
129 &pcm);
130 if (err < 0) {
131 kfree(as);
132 return err;
133 }
134 as->pcm = pcm;
135 pcm->private_data = as;
136 pcm->private_free = snd_usb_audio_pcm_free;
137 pcm->info_flags = 0;
138 if (chip->pcm_devs > 0)
139 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
140 else
141 strcpy(pcm->name, "USB Audio");
142
143 snd_usb_init_substream(as, stream, fp);
144
145 list_add(&as->list, &chip->pcm_list);
146 chip->pcm_devs++;
147
148 snd_usb_proc_pcm_format_add(as);
149
150 return 0;
151}
152
153static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
154 struct usb_host_interface *alts,
155 int protocol, int iface_no)
156{
157 /* parsed with a v1 header here. that's ok as we only look at the
158 * header first which is the same for both versions */
159 struct uac_iso_endpoint_descriptor *csep;
160 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
161 int attributes = 0;
162
163 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
164
165 /* Creamware Noah has this descriptor after the 2nd endpoint */
166 if (!csep && altsd->bNumEndpoints >= 2)
167 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
168
169 if (!csep || csep->bLength < 7 ||
170 csep->bDescriptorSubtype != UAC_EP_GENERAL) {
171 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
172 " class specific endpoint descriptor\n",
173 chip->dev->devnum, iface_no,
174 altsd->bAlternateSetting);
175 return 0;
176 }
177
178 if (protocol == UAC_VERSION_1) {
179 attributes = csep->bmAttributes;
180 } else {
181 struct uac2_iso_endpoint_descriptor *csep2 =
182 (struct uac2_iso_endpoint_descriptor *) csep;
183
184 attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX;
185
186 /* emulate the endpoint attributes of a v1 device */
187 if (csep2->bmControls & UAC2_CONTROL_PITCH)
188 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
189 }
190
191 return attributes;
192}
193
194static struct uac2_input_terminal_descriptor *
195 snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface,
196 int terminal_id)
197{
198 struct uac2_input_terminal_descriptor *term = NULL;
199
200 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
201 ctrl_iface->extralen,
202 term, UAC_INPUT_TERMINAL))) {
203 if (term->bTerminalID == terminal_id)
204 return term;
205 }
206
207 return NULL;
208}
209
210static struct uac2_output_terminal_descriptor *
211 snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
212 int terminal_id)
213{
214 struct uac2_output_terminal_descriptor *term = NULL;
215
216 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
217 ctrl_iface->extralen,
218 term, UAC_OUTPUT_TERMINAL))) {
219 if (term->bTerminalID == terminal_id)
220 return term;
221 }
222
223 return NULL;
224}
225
226int snd_usb_parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
227{
228 struct usb_device *dev;
229 struct usb_interface *iface;
230 struct usb_host_interface *alts;
231 struct usb_interface_descriptor *altsd;
232 int i, altno, err, stream;
233 int format = 0, num_channels = 0;
234 struct audioformat *fp = NULL;
235 int num, protocol, clock = 0;
236 struct uac_format_type_i_continuous_descriptor *fmt;
237
238 dev = chip->dev;
239
240 /* parse the interface's altsettings */
241 iface = usb_ifnum_to_if(dev, iface_no);
242
243 num = iface->num_altsetting;
244
245 /*
246 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
247 * one misses syncpipe, and does not produce any sound.
248 */
249 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
250 num = 4;
251
252 for (i = 0; i < num; i++) {
253 alts = &iface->altsetting[i];
254 altsd = get_iface_desc(alts);
255 protocol = altsd->bInterfaceProtocol;
256 /* skip invalid one */
257 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
258 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
259 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
260 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
261 altsd->bNumEndpoints < 1 ||
262 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
263 continue;
264 /* must be isochronous */
265 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
266 USB_ENDPOINT_XFER_ISOC)
267 continue;
268 /* check direction */
269 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
270 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
271 altno = altsd->bAlternateSetting;
272
273 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
274 continue;
275
276 /* get audio formats */
277 switch (protocol) {
278 default:
279 snd_printdd(KERN_WARNING "%d:%u:%d: unknown interface protocol %#02x, assuming v1\n",
280 dev->devnum, iface_no, altno, protocol);
281 protocol = UAC_VERSION_1;
282 /* fall through */
283
284 case UAC_VERSION_1: {
285 struct uac1_as_header_descriptor *as =
286 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
287
288 if (!as) {
289 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
290 dev->devnum, iface_no, altno);
291 continue;
292 }
293
294 if (as->bLength < sizeof(*as)) {
295 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
296 dev->devnum, iface_no, altno);
297 continue;
298 }
299
300 format = le16_to_cpu(as->wFormatTag); /* remember the format value */
301 break;
302 }
303
304 case UAC_VERSION_2: {
305 struct uac2_input_terminal_descriptor *input_term;
306 struct uac2_output_terminal_descriptor *output_term;
307 struct uac2_as_header_descriptor *as =
308 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
309
310 if (!as) {
311 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
312 dev->devnum, iface_no, altno);
313 continue;
314 }
315
316 if (as->bLength < sizeof(*as)) {
317 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
318 dev->devnum, iface_no, altno);
319 continue;
320 }
321
322 num_channels = as->bNrChannels;
323 format = le32_to_cpu(as->bmFormats);
324
325 /* lookup the terminal associated to this interface
326 * to extract the clock */
327 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
328 as->bTerminalLink);
329 if (input_term) {
330 clock = input_term->bCSourceID;
331 break;
332 }
333
334 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
335 as->bTerminalLink);
336 if (output_term) {
337 clock = output_term->bCSourceID;
338 break;
339 }
340
341 snd_printk(KERN_ERR "%d:%u:%d : bogus bTerminalLink %d\n",
342 dev->devnum, iface_no, altno, as->bTerminalLink);
343 continue;
344 }
345 }
346
347 /* get format type */
348 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
349 if (!fmt) {
350 snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n",
351 dev->devnum, iface_no, altno);
352 continue;
353 }
354 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
355 ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) {
356 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
357 dev->devnum, iface_no, altno);
358 continue;
359 }
360
361 /*
362 * Blue Microphones workaround: The last altsetting is identical
363 * with the previous one, except for a larger packet size, but
364 * is actually a mislabeled two-channel setting; ignore it.
365 */
366 if (fmt->bNrChannels == 1 &&
367 fmt->bSubframeSize == 2 &&
368 altno == 2 && num == 3 &&
369 fp && fp->altsetting == 1 && fp->channels == 1 &&
370 fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
371 protocol == UAC_VERSION_1 &&
372 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
373 fp->maxpacksize * 2)
374 continue;
375
376 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
377 if (! fp) {
378 snd_printk(KERN_ERR "cannot malloc\n");
379 return -ENOMEM;
380 }
381
382 fp->iface = iface_no;
383 fp->altsetting = altno;
384 fp->altset_idx = i;
385 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
386 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
387 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
388 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
389 /* num_channels is only set for v2 interfaces */
390 fp->channels = num_channels;
391 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
392 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
393 * (fp->maxpacksize & 0x7ff);
394 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
395 fp->clock = clock;
396
397 /* some quirks for attributes here */
398
399 switch (chip->usb_id) {
400 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
401 /* Optoplay sets the sample rate attribute although
402 * it seems not supporting it in fact.
403 */
404 fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
405 break;
406 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
407 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
408 /* doesn't set the sample rate attribute, but supports it */
409 fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
410 break;
411 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */
412 case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */
413 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
414 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
415 an older model 77d:223) */
416 /*
417 * plantronics headset and Griffin iMic have set adaptive-in
418 * although it's really not...
419 */
420 fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
421 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
422 fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
423 else
424 fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
425 break;
426 }
427
428 /* ok, let's parse further... */
429 if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream, alts) < 0) {
430 kfree(fp->rate_table);
431 kfree(fp);
432 fp = NULL;
433 continue;
434 }
435
436 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
437 err = snd_usb_add_audio_endpoint(chip, stream, fp);
438 if (err < 0) {
439 kfree(fp->rate_table);
440 kfree(fp);
441 return err;
442 }
443 /* try to set the interface... */
444 usb_set_interface(chip->dev, iface_no, altno);
445 snd_usb_init_pitch(chip, iface_no, alts, fp);
446 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
447 }
448 return 0;
449}
450
diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h
index 64dd0db023b2..e5d8a6adf38f 100644
--- a/sound/usb/endpoint.h
+++ b/sound/usb/endpoint.h
@@ -1,11 +1,4 @@
1#ifndef __USBAUDIO_ENDPOINT_H 1#ifndef __USBAUDIO_ENDPOINT_H
2#define __USBAUDIO_ENDPOINT_H 2#define __USBAUDIO_ENDPOINT_H
3 3
4int snd_usb_parse_audio_endpoints(struct snd_usb_audio *chip,
5 int iface_no);
6
7int snd_usb_add_audio_endpoint(struct snd_usb_audio *chip,
8 int stream,
9 struct audioformat *fp);
10
11#endif /* __USBAUDIO_ENDPOINT_H */ 4#endif /* __USBAUDIO_ENDPOINT_H */
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index cf61b0340026..556edea28b90 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -34,6 +34,7 @@
34#include "endpoint.h" 34#include "endpoint.h"
35#include "pcm.h" 35#include "pcm.h"
36#include "clock.h" 36#include "clock.h"
37#include "stream.h"
37 38
38/* 39/*
39 * handle the quirks for the contained interfaces 40 * handle the quirks for the contained interfaces
@@ -106,7 +107,7 @@ static int create_standard_audio_quirk(struct snd_usb_audio *chip,
106 107
107 alts = &iface->altsetting[0]; 108 alts = &iface->altsetting[0];
108 altsd = get_iface_desc(alts); 109 altsd = get_iface_desc(alts);
109 err = snd_usb_parse_audio_endpoints(chip, altsd->bInterfaceNumber); 110 err = snd_usb_parse_audio_interface(chip, altsd->bInterfaceNumber);
110 if (err < 0) { 111 if (err < 0) {
111 snd_printk(KERN_ERR "cannot setup if %d: error %d\n", 112 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
112 altsd->bInterfaceNumber, err); 113 altsd->bInterfaceNumber, err);
@@ -147,7 +148,7 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
147 148
148 stream = (fp->endpoint & USB_DIR_IN) 149 stream = (fp->endpoint & USB_DIR_IN)
149 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 150 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
150 err = snd_usb_add_audio_endpoint(chip, stream, fp); 151 err = snd_usb_add_audio_stream(chip, stream, fp);
151 if (err < 0) { 152 if (err < 0) {
152 kfree(fp); 153 kfree(fp);
153 kfree(rate_table); 154 kfree(rate_table);
@@ -254,7 +255,7 @@ static int create_uaxx_quirk(struct snd_usb_audio *chip,
254 255
255 stream = (fp->endpoint & USB_DIR_IN) 256 stream = (fp->endpoint & USB_DIR_IN)
256 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 257 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
257 err = snd_usb_add_audio_endpoint(chip, stream, fp); 258 err = snd_usb_add_audio_stream(chip, stream, fp);
258 if (err < 0) { 259 if (err < 0) {
259 kfree(fp); 260 kfree(fp);
260 return err; 261 return err;
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
new file mode 100644
index 000000000000..4688d4c6208b
--- /dev/null
+++ b/sound/usb/stream.c
@@ -0,0 +1,453 @@
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 "proc.h"
30#include "quirks.h"
31#include "endpoint.h"
32#include "urb.h"
33#include "pcm.h"
34#include "helper.h"
35#include "format.h"
36#include "clock.h"
37#include "stream.h"
38
39/*
40 * free a substream
41 */
42static void free_substream(struct snd_usb_substream *subs)
43{
44 struct list_head *p, *n;
45
46 if (!subs->num_formats)
47 return; /* not initialized */
48 list_for_each_safe(p, n, &subs->fmt_list) {
49 struct audioformat *fp = list_entry(p, struct audioformat, list);
50 kfree(fp->rate_table);
51 kfree(fp);
52 }
53 kfree(subs->rate_list.list);
54}
55
56
57/*
58 * free a usb stream instance
59 */
60static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
61{
62 free_substream(&stream->substream[0]);
63 free_substream(&stream->substream[1]);
64 list_del(&stream->list);
65 kfree(stream);
66}
67
68static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
69{
70 struct snd_usb_stream *stream = pcm->private_data;
71 if (stream) {
72 stream->pcm = NULL;
73 snd_usb_audio_stream_free(stream);
74 }
75}
76
77
78/*
79 * add this endpoint to the chip instance.
80 * if a stream with the same endpoint already exists, append to it.
81 * if not, create a new pcm stream.
82 */
83int snd_usb_add_audio_stream(struct snd_usb_audio *chip,
84 int stream,
85 struct audioformat *fp)
86{
87 struct list_head *p;
88 struct snd_usb_stream *as;
89 struct snd_usb_substream *subs;
90 struct snd_pcm *pcm;
91 int err;
92
93 list_for_each(p, &chip->pcm_list) {
94 as = list_entry(p, struct snd_usb_stream, list);
95 if (as->fmt_type != fp->fmt_type)
96 continue;
97 subs = &as->substream[stream];
98 if (!subs->endpoint)
99 continue;
100 if (subs->endpoint == fp->endpoint) {
101 list_add_tail(&fp->list, &subs->fmt_list);
102 subs->num_formats++;
103 subs->formats |= fp->formats;
104 return 0;
105 }
106 }
107 /* look for an empty stream */
108 list_for_each(p, &chip->pcm_list) {
109 as = list_entry(p, struct snd_usb_stream, list);
110 if (as->fmt_type != fp->fmt_type)
111 continue;
112 subs = &as->substream[stream];
113 if (subs->endpoint)
114 continue;
115 err = snd_pcm_new_stream(as->pcm, stream, 1);
116 if (err < 0)
117 return err;
118 snd_usb_init_substream(as, stream, fp);
119 return 0;
120 }
121
122 /* create a new pcm */
123 as = kzalloc(sizeof(*as), GFP_KERNEL);
124 if (!as)
125 return -ENOMEM;
126 as->pcm_index = chip->pcm_devs;
127 as->chip = chip;
128 as->fmt_type = fp->fmt_type;
129 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
130 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
131 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
132 &pcm);
133 if (err < 0) {
134 kfree(as);
135 return err;
136 }
137 as->pcm = pcm;
138 pcm->private_data = as;
139 pcm->private_free = snd_usb_audio_pcm_free;
140 pcm->info_flags = 0;
141 if (chip->pcm_devs > 0)
142 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
143 else
144 strcpy(pcm->name, "USB Audio");
145
146 snd_usb_init_substream(as, stream, fp);
147
148 list_add(&as->list, &chip->pcm_list);
149 chip->pcm_devs++;
150
151 snd_usb_proc_pcm_format_add(as);
152
153 return 0;
154}
155
156static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
157 struct usb_host_interface *alts,
158 int protocol, int iface_no)
159{
160 /* parsed with a v1 header here. that's ok as we only look at the
161 * header first which is the same for both versions */
162 struct uac_iso_endpoint_descriptor *csep;
163 struct usb_interface_descriptor *altsd = get_iface_desc(alts);
164 int attributes = 0;
165
166 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
167
168 /* Creamware Noah has this descriptor after the 2nd endpoint */
169 if (!csep && altsd->bNumEndpoints >= 2)
170 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
171
172 if (!csep || csep->bLength < 7 ||
173 csep->bDescriptorSubtype != UAC_EP_GENERAL) {
174 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
175 " class specific endpoint descriptor\n",
176 chip->dev->devnum, iface_no,
177 altsd->bAlternateSetting);
178 return 0;
179 }
180
181 if (protocol == UAC_VERSION_1) {
182 attributes = csep->bmAttributes;
183 } else {
184 struct uac2_iso_endpoint_descriptor *csep2 =
185 (struct uac2_iso_endpoint_descriptor *) csep;
186
187 attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX;
188
189 /* emulate the endpoint attributes of a v1 device */
190 if (csep2->bmControls & UAC2_CONTROL_PITCH)
191 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
192 }
193
194 return attributes;
195}
196
197static struct uac2_input_terminal_descriptor *
198 snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface,
199 int terminal_id)
200{
201 struct uac2_input_terminal_descriptor *term = NULL;
202
203 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
204 ctrl_iface->extralen,
205 term, UAC_INPUT_TERMINAL))) {
206 if (term->bTerminalID == terminal_id)
207 return term;
208 }
209
210 return NULL;
211}
212
213static struct uac2_output_terminal_descriptor *
214 snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
215 int terminal_id)
216{
217 struct uac2_output_terminal_descriptor *term = NULL;
218
219 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
220 ctrl_iface->extralen,
221 term, UAC_OUTPUT_TERMINAL))) {
222 if (term->bTerminalID == terminal_id)
223 return term;
224 }
225
226 return NULL;
227}
228
229int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
230{
231 struct usb_device *dev;
232 struct usb_interface *iface;
233 struct usb_host_interface *alts;
234 struct usb_interface_descriptor *altsd;
235 int i, altno, err, stream;
236 int format = 0, num_channels = 0;
237 struct audioformat *fp = NULL;
238 int num, protocol, clock = 0;
239 struct uac_format_type_i_continuous_descriptor *fmt;
240
241 dev = chip->dev;
242
243 /* parse the interface's altsettings */
244 iface = usb_ifnum_to_if(dev, iface_no);
245
246 num = iface->num_altsetting;
247
248 /*
249 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
250 * one misses syncpipe, and does not produce any sound.
251 */
252 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
253 num = 4;
254
255 for (i = 0; i < num; i++) {
256 alts = &iface->altsetting[i];
257 altsd = get_iface_desc(alts);
258 protocol = altsd->bInterfaceProtocol;
259 /* skip invalid one */
260 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
261 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
262 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
263 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
264 altsd->bNumEndpoints < 1 ||
265 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
266 continue;
267 /* must be isochronous */
268 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
269 USB_ENDPOINT_XFER_ISOC)
270 continue;
271 /* check direction */
272 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
273 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
274 altno = altsd->bAlternateSetting;
275
276 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
277 continue;
278
279 /* get audio formats */
280 switch (protocol) {
281 default:
282 snd_printdd(KERN_WARNING "%d:%u:%d: unknown interface protocol %#02x, assuming v1\n",
283 dev->devnum, iface_no, altno, protocol);
284 protocol = UAC_VERSION_1;
285 /* fall through */
286
287 case UAC_VERSION_1: {
288 struct uac1_as_header_descriptor *as =
289 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
290
291 if (!as) {
292 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
293 dev->devnum, iface_no, altno);
294 continue;
295 }
296
297 if (as->bLength < sizeof(*as)) {
298 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
299 dev->devnum, iface_no, altno);
300 continue;
301 }
302
303 format = le16_to_cpu(as->wFormatTag); /* remember the format value */
304 break;
305 }
306
307 case UAC_VERSION_2: {
308 struct uac2_input_terminal_descriptor *input_term;
309 struct uac2_output_terminal_descriptor *output_term;
310 struct uac2_as_header_descriptor *as =
311 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
312
313 if (!as) {
314 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
315 dev->devnum, iface_no, altno);
316 continue;
317 }
318
319 if (as->bLength < sizeof(*as)) {
320 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
321 dev->devnum, iface_no, altno);
322 continue;
323 }
324
325 num_channels = as->bNrChannels;
326 format = le32_to_cpu(as->bmFormats);
327
328 /* lookup the terminal associated to this interface
329 * to extract the clock */
330 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
331 as->bTerminalLink);
332 if (input_term) {
333 clock = input_term->bCSourceID;
334 break;
335 }
336
337 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
338 as->bTerminalLink);
339 if (output_term) {
340 clock = output_term->bCSourceID;
341 break;
342 }
343
344 snd_printk(KERN_ERR "%d:%u:%d : bogus bTerminalLink %d\n",
345 dev->devnum, iface_no, altno, as->bTerminalLink);
346 continue;
347 }
348 }
349
350 /* get format type */
351 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
352 if (!fmt) {
353 snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n",
354 dev->devnum, iface_no, altno);
355 continue;
356 }
357 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
358 ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) {
359 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
360 dev->devnum, iface_no, altno);
361 continue;
362 }
363
364 /*
365 * Blue Microphones workaround: The last altsetting is identical
366 * with the previous one, except for a larger packet size, but
367 * is actually a mislabeled two-channel setting; ignore it.
368 */
369 if (fmt->bNrChannels == 1 &&
370 fmt->bSubframeSize == 2 &&
371 altno == 2 && num == 3 &&
372 fp && fp->altsetting == 1 && fp->channels == 1 &&
373 fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
374 protocol == UAC_VERSION_1 &&
375 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
376 fp->maxpacksize * 2)
377 continue;
378
379 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
380 if (! fp) {
381 snd_printk(KERN_ERR "cannot malloc\n");
382 return -ENOMEM;
383 }
384
385 fp->iface = iface_no;
386 fp->altsetting = altno;
387 fp->altset_idx = i;
388 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
389 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
390 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
391 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
392 /* num_channels is only set for v2 interfaces */
393 fp->channels = num_channels;
394 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
395 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
396 * (fp->maxpacksize & 0x7ff);
397 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
398 fp->clock = clock;
399
400 /* some quirks for attributes here */
401
402 switch (chip->usb_id) {
403 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
404 /* Optoplay sets the sample rate attribute although
405 * it seems not supporting it in fact.
406 */
407 fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
408 break;
409 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
410 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
411 /* doesn't set the sample rate attribute, but supports it */
412 fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
413 break;
414 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */
415 case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */
416 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
417 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
418 an older model 77d:223) */
419 /*
420 * plantronics headset and Griffin iMic have set adaptive-in
421 * although it's really not...
422 */
423 fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
424 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
425 fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
426 else
427 fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
428 break;
429 }
430
431 /* ok, let's parse further... */
432 if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream, alts) < 0) {
433 kfree(fp->rate_table);
434 kfree(fp);
435 fp = NULL;
436 continue;
437 }
438
439 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
440 err = snd_usb_add_audio_stream(chip, stream, fp);
441 if (err < 0) {
442 kfree(fp->rate_table);
443 kfree(fp);
444 return err;
445 }
446 /* try to set the interface... */
447 usb_set_interface(chip->dev, iface_no, altno);
448 snd_usb_init_pitch(chip, iface_no, alts, fp);
449 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
450 }
451 return 0;
452}
453
diff --git a/sound/usb/stream.h b/sound/usb/stream.h
new file mode 100644
index 000000000000..c97f679fc84f
--- /dev/null
+++ b/sound/usb/stream.h
@@ -0,0 +1,12 @@
1#ifndef __USBAUDIO_STREAM_H
2#define __USBAUDIO_STREAM_H
3
4int snd_usb_parse_audio_interface(struct snd_usb_audio *chip,
5 int iface_no);
6
7int snd_usb_add_audio_stream(struct snd_usb_audio *chip,
8 int stream,
9 struct audioformat *fp);
10
11#endif /* __USBAUDIO_STREAM_H */
12
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-06 10:47:00 -0500