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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 "proc.h" |
30 | #include "quirks.h" |
31 | #include "endpoint.h" |
32 | #include "pcm.h" |
33 | #include "helper.h" |
34 | #include "format.h" |
35 | #include "clock.h" |
36 | #include "stream.h" |
37 | |
38 | /* |
39 | * free a substream |
40 | */ |
41 | static 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 | */ |
59 | static 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 | |
67 | static 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 | * initialize the substream instance. |
78 | */ |
79 | |
80 | static void snd_usb_init_substream(struct snd_usb_stream *as, |
81 | int stream, |
82 | struct audioformat *fp) |
83 | { |
84 | struct snd_usb_substream *subs = &as->substream[stream]; |
85 | |
86 | INIT_LIST_HEAD(&subs->fmt_list); |
87 | spin_lock_init(&subs->lock); |
88 | |
89 | subs->stream = as; |
90 | subs->direction = stream; |
91 | subs->dev = as->chip->dev; |
92 | subs->txfr_quirk = as->chip->txfr_quirk; |
93 | |
94 | snd_usb_set_pcm_ops(as->pcm, stream); |
95 | |
96 | list_add_tail(&fp->list, &subs->fmt_list); |
97 | subs->formats |= fp->formats; |
98 | subs->num_formats++; |
99 | subs->fmt_type = fp->fmt_type; |
100 | subs->ep_num = fp->endpoint; |
101 | } |
102 | |
103 | /* |
104 | * add this endpoint to the chip instance. |
105 | * if a stream with the same endpoint already exists, append to it. |
106 | * if not, create a new pcm stream. |
107 | */ |
108 | int snd_usb_add_audio_stream(struct snd_usb_audio *chip, |
109 | int stream, |
110 | struct audioformat *fp) |
111 | { |
112 | struct list_head *p; |
113 | struct snd_usb_stream *as; |
114 | struct snd_usb_substream *subs; |
115 | struct snd_pcm *pcm; |
116 | int err; |
117 | |
118 | list_for_each(p, &chip->pcm_list) { |
119 | as = list_entry(p, struct snd_usb_stream, list); |
120 | if (as->fmt_type != fp->fmt_type) |
121 | continue; |
122 | subs = &as->substream[stream]; |
123 | if (subs->ep_num == fp->endpoint) { |
124 | list_add_tail(&fp->list, &subs->fmt_list); |
125 | subs->num_formats++; |
126 | subs->formats |= fp->formats; |
127 | return 0; |
128 | } |
129 | } |
130 | /* look for an empty stream */ |
131 | list_for_each(p, &chip->pcm_list) { |
132 | as = list_entry(p, struct snd_usb_stream, list); |
133 | if (as->fmt_type != fp->fmt_type) |
134 | continue; |
135 | subs = &as->substream[stream]; |
136 | if (subs->ep_num) |
137 | continue; |
138 | err = snd_pcm_new_stream(as->pcm, stream, 1); |
139 | if (err < 0) |
140 | return err; |
141 | snd_usb_init_substream(as, stream, fp); |
142 | return 0; |
143 | } |
144 | |
145 | /* create a new pcm */ |
146 | as = kzalloc(sizeof(*as), GFP_KERNEL); |
147 | if (!as) |
148 | return -ENOMEM; |
149 | as->pcm_index = chip->pcm_devs; |
150 | as->chip = chip; |
151 | as->fmt_type = fp->fmt_type; |
152 | err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs, |
153 | stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0, |
154 | stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1, |
155 | &pcm); |
156 | if (err < 0) { |
157 | kfree(as); |
158 | return err; |
159 | } |
160 | as->pcm = pcm; |
161 | pcm->private_data = as; |
162 | pcm->private_free = snd_usb_audio_pcm_free; |
163 | pcm->info_flags = 0; |
164 | if (chip->pcm_devs > 0) |
165 | sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs); |
166 | else |
167 | strcpy(pcm->name, "USB Audio"); |
168 | |
169 | snd_usb_init_substream(as, stream, fp); |
170 | |
171 | list_add(&as->list, &chip->pcm_list); |
172 | chip->pcm_devs++; |
173 | |
174 | snd_usb_proc_pcm_format_add(as); |
175 | |
176 | return 0; |
177 | } |
178 | |
179 | static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip, |
180 | struct usb_host_interface *alts, |
181 | int protocol, int iface_no) |
182 | { |
183 | /* parsed with a v1 header here. that's ok as we only look at the |
184 | * header first which is the same for both versions */ |
185 | struct uac_iso_endpoint_descriptor *csep; |
186 | struct usb_interface_descriptor *altsd = get_iface_desc(alts); |
187 | int attributes = 0; |
188 | |
189 | csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT); |
190 | |
191 | /* Creamware Noah has this descriptor after the 2nd endpoint */ |
192 | if (!csep && altsd->bNumEndpoints >= 2) |
193 | csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT); |
194 | |
195 | if (!csep || csep->bLength < 7 || |
196 | csep->bDescriptorSubtype != UAC_EP_GENERAL) { |
197 | snd_printk(KERN_WARNING "%d:%u:%d : no or invalid" |
198 | " class specific endpoint descriptor\n", |
199 | chip->dev->devnum, iface_no, |
200 | altsd->bAlternateSetting); |
201 | return 0; |
202 | } |
203 | |
204 | if (protocol == UAC_VERSION_1) { |
205 | attributes = csep->bmAttributes; |
206 | } else { |
207 | struct uac2_iso_endpoint_descriptor *csep2 = |
208 | (struct uac2_iso_endpoint_descriptor *) csep; |
209 | |
210 | attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX; |
211 | |
212 | /* emulate the endpoint attributes of a v1 device */ |
213 | if (csep2->bmControls & UAC2_CONTROL_PITCH) |
214 | attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL; |
215 | } |
216 | |
217 | return attributes; |
218 | } |
219 | |
220 | static struct uac2_input_terminal_descriptor * |
221 | snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface, |
222 | int terminal_id) |
223 | { |
224 | struct uac2_input_terminal_descriptor *term = NULL; |
225 | |
226 | while ((term = snd_usb_find_csint_desc(ctrl_iface->extra, |
227 | ctrl_iface->extralen, |
228 | term, UAC_INPUT_TERMINAL))) { |
229 | if (term->bTerminalID == terminal_id) |
230 | return term; |
231 | } |
232 | |
233 | return NULL; |
234 | } |
235 | |
236 | static struct uac2_output_terminal_descriptor * |
237 | snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface, |
238 | int terminal_id) |
239 | { |
240 | struct uac2_output_terminal_descriptor *term = NULL; |
241 | |
242 | while ((term = snd_usb_find_csint_desc(ctrl_iface->extra, |
243 | ctrl_iface->extralen, |
244 | term, UAC_OUTPUT_TERMINAL))) { |
245 | if (term->bTerminalID == terminal_id) |
246 | return term; |
247 | } |
248 | |
249 | return NULL; |
250 | } |
251 | |
252 | int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no) |
253 | { |
254 | struct usb_device *dev; |
255 | struct usb_interface *iface; |
256 | struct usb_host_interface *alts; |
257 | struct usb_interface_descriptor *altsd; |
258 | int i, altno, err, stream; |
259 | int format = 0, num_channels = 0; |
260 | struct audioformat *fp = NULL; |
261 | int num, protocol, clock = 0; |
262 | struct uac_format_type_i_continuous_descriptor *fmt; |
263 | |
264 | dev = chip->dev; |
265 | |
266 | /* parse the interface's altsettings */ |
267 | iface = usb_ifnum_to_if(dev, iface_no); |
268 | |
269 | num = iface->num_altsetting; |
270 | |
271 | /* |
272 | * Dallas DS4201 workaround: It presents 5 altsettings, but the last |
273 | * one misses syncpipe, and does not produce any sound. |
274 | */ |
275 | if (chip->usb_id == USB_ID(0x04fa, 0x4201)) |
276 | num = 4; |
277 | |
278 | for (i = 0; i < num; i++) { |
279 | alts = &iface->altsetting[i]; |
280 | altsd = get_iface_desc(alts); |
281 | protocol = altsd->bInterfaceProtocol; |
282 | /* skip invalid one */ |
283 | if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && |
284 | altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || |
285 | (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING && |
286 | altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) || |
287 | altsd->bNumEndpoints < 1 || |
288 | le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0) |
289 | continue; |
290 | /* must be isochronous */ |
291 | if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != |
292 | USB_ENDPOINT_XFER_ISOC) |
293 | continue; |
294 | /* check direction */ |
295 | stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ? |
296 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; |
297 | altno = altsd->bAlternateSetting; |
298 | |
299 | if (snd_usb_apply_interface_quirk(chip, iface_no, altno)) |
300 | continue; |
301 | |
302 | /* get audio formats */ |
303 | switch (protocol) { |
304 | default: |
305 | snd_printdd(KERN_WARNING "%d:%u:%d: unknown interface protocol %#02x, assuming v1\n", |
306 | dev->devnum, iface_no, altno, protocol); |
307 | protocol = UAC_VERSION_1; |
308 | /* fall through */ |
309 | |
310 | case UAC_VERSION_1: { |
311 | struct uac1_as_header_descriptor *as = |
312 | snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); |
313 | |
314 | if (!as) { |
315 | snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n", |
316 | dev->devnum, iface_no, altno); |
317 | continue; |
318 | } |
319 | |
320 | if (as->bLength < sizeof(*as)) { |
321 | snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n", |
322 | dev->devnum, iface_no, altno); |
323 | continue; |
324 | } |
325 | |
326 | format = le16_to_cpu(as->wFormatTag); /* remember the format value */ |
327 | break; |
328 | } |
329 | |
330 | case UAC_VERSION_2: { |
331 | struct uac2_input_terminal_descriptor *input_term; |
332 | struct uac2_output_terminal_descriptor *output_term; |
333 | struct uac2_as_header_descriptor *as = |
334 | snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); |
335 | |
336 | if (!as) { |
337 | snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n", |
338 | dev->devnum, iface_no, altno); |
339 | continue; |
340 | } |
341 | |
342 | if (as->bLength < sizeof(*as)) { |
343 | snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n", |
344 | dev->devnum, iface_no, altno); |
345 | continue; |
346 | } |
347 | |
348 | num_channels = as->bNrChannels; |
349 | format = le32_to_cpu(as->bmFormats); |
350 | |
351 | /* lookup the terminal associated to this interface |
352 | * to extract the clock */ |
353 | input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf, |
354 | as->bTerminalLink); |
355 | if (input_term) { |
356 | clock = input_term->bCSourceID; |
357 | break; |
358 | } |
359 | |
360 | output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf, |
361 | as->bTerminalLink); |
362 | if (output_term) { |
363 | clock = output_term->bCSourceID; |
364 | break; |
365 | } |
366 | |
367 | snd_printk(KERN_ERR "%d:%u:%d : bogus bTerminalLink %d\n", |
368 | dev->devnum, iface_no, altno, as->bTerminalLink); |
369 | continue; |
370 | } |
371 | } |
372 | |
373 | /* get format type */ |
374 | fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE); |
375 | if (!fmt) { |
376 | snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n", |
377 | dev->devnum, iface_no, altno); |
378 | continue; |
379 | } |
380 | if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) || |
381 | ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) { |
382 | snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n", |
383 | dev->devnum, iface_no, altno); |
384 | continue; |
385 | } |
386 | |
387 | /* |
388 | * Blue Microphones workaround: The last altsetting is identical |
389 | * with the previous one, except for a larger packet size, but |
390 | * is actually a mislabeled two-channel setting; ignore it. |
391 | */ |
392 | if (fmt->bNrChannels == 1 && |
393 | fmt->bSubframeSize == 2 && |
394 | altno == 2 && num == 3 && |
395 | fp && fp->altsetting == 1 && fp->channels == 1 && |
396 | fp->formats == SNDRV_PCM_FMTBIT_S16_LE && |
397 | protocol == UAC_VERSION_1 && |
398 | le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == |
399 | fp->maxpacksize * 2) |
400 | continue; |
401 | |
402 | fp = kzalloc(sizeof(*fp), GFP_KERNEL); |
403 | if (! fp) { |
404 | snd_printk(KERN_ERR "cannot malloc\n"); |
405 | return -ENOMEM; |
406 | } |
407 | |
408 | fp->iface = iface_no; |
409 | fp->altsetting = altno; |
410 | fp->altset_idx = i; |
411 | fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress; |
412 | fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; |
413 | fp->datainterval = snd_usb_parse_datainterval(chip, alts); |
414 | fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); |
415 | /* num_channels is only set for v2 interfaces */ |
416 | fp->channels = num_channels; |
417 | if (snd_usb_get_speed(dev) == USB_SPEED_HIGH) |
418 | fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1) |
419 | * (fp->maxpacksize & 0x7ff); |
420 | fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no); |
421 | fp->clock = clock; |
422 | |
423 | /* some quirks for attributes here */ |
424 | |
425 | switch (chip->usb_id) { |
426 | case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */ |
427 | /* Optoplay sets the sample rate attribute although |
428 | * it seems not supporting it in fact. |
429 | */ |
430 | fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE; |
431 | break; |
432 | case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */ |
433 | case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ |
434 | /* doesn't set the sample rate attribute, but supports it */ |
435 | fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE; |
436 | break; |
437 | case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */ |
438 | case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */ |
439 | case USB_ID(0x047f, 0x0ca1): /* plantronics headset */ |
440 | case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is |
441 | an older model 77d:223) */ |
442 | /* |
443 | * plantronics headset and Griffin iMic have set adaptive-in |
444 | * although it's really not... |
445 | */ |
446 | fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE; |
447 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
448 | fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE; |
449 | else |
450 | fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC; |
451 | break; |
452 | } |
453 | |
454 | /* ok, let's parse further... */ |
455 | if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream, alts) < 0) { |
456 | kfree(fp->rate_table); |
457 | kfree(fp); |
458 | fp = NULL; |
459 | continue; |
460 | } |
461 | |
462 | snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint); |
463 | err = snd_usb_add_audio_stream(chip, stream, fp); |
464 | if (err < 0) { |
465 | kfree(fp->rate_table); |
466 | kfree(fp); |
467 | return err; |
468 | } |
469 | /* try to set the interface... */ |
470 | usb_set_interface(chip->dev, iface_no, altno); |
471 | snd_usb_init_pitch(chip, iface_no, alts, fp); |
472 | snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max); |
473 | } |
474 | return 0; |
475 | } |
476 | |
477 |
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