Root/
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 | |
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 | /* |
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 | */ |
82 | int 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 | |
153 | static 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 | |
194 | static 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 | |
210 | static 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 | |
226 | int 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(0x047f, 0x0ca1): /* plantronics headset */ |
412 | case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is |
413 | an older model 77d:223) */ |
414 | /* |
415 | * plantronics headset and Griffin iMic have set adaptive-in |
416 | * although it's really not... |
417 | */ |
418 | fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE; |
419 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
420 | fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE; |
421 | else |
422 | fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC; |
423 | break; |
424 | } |
425 | |
426 | /* ok, let's parse further... */ |
427 | if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream, alts) < 0) { |
428 | kfree(fp->rate_table); |
429 | kfree(fp); |
430 | fp = NULL; |
431 | continue; |
432 | } |
433 | |
434 | snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint); |
435 | err = snd_usb_add_audio_endpoint(chip, stream, fp); |
436 | if (err < 0) { |
437 | kfree(fp->rate_table); |
438 | kfree(fp); |
439 | return err; |
440 | } |
441 | /* try to set the interface... */ |
442 | usb_set_interface(chip->dev, iface_no, altno); |
443 | snd_usb_init_pitch(chip, iface_no, alts, fp); |
444 | snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max); |
445 | } |
446 | return 0; |
447 | } |
448 | |
449 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9