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IPv6: reassembly: replace magic number with macro definitions
[net-next-2.6.git] / sound / usb / usbaudio.c
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1da177e4
LT		 1/*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Main and PCM part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 *
28 * NOTES:
29 *
30 * - async unlink should be used for avoiding the sleep inside lock.
31 * 2.4.22 usb-uhci seems buggy for async unlinking and results in
32 * oops. in such a cse, pass async_unlink=0 option.
33 * - the linked URBs would be preferred but not used so far because of
34 * the instability of unlinking.
35 * - type II is not supported properly. there is no device which supports
36 * this type *correctly*. SB extigy looks as if it supports, but it's
37 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
38 */
39
40
1da177e4
LT		 41#include <linux/bitops.h>
42#include <linux/init.h>
43#include <linux/list.h>
44#include <linux/slab.h>
45#include <linux/string.h>
46#include <linux/usb.h>
6207e51b 47#include <linux/vmalloc.h>
1da177e4 48#include <linux/moduleparam.h>
12aa7579 49#include <linux/mutex.h>
1da177e4
LT		 50#include <sound/core.h>
51#include <sound/info.h>
52#include <sound/pcm.h>
53#include <sound/pcm_params.h>
54#include <sound/initval.h>
55
56#include "usbaudio.h"
57
58
59MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
60MODULE_DESCRIPTION("USB Audio");
61MODULE_LICENSE("GPL");
62MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
63
64
65static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
66static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
07f51a72
PM		 67static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
68/* Vendor/product IDs for this card */
69static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
70static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
92b9ac78 71static int nrpacks = 8; /* max. number of packets per urb */
1da177e4 72static int async_unlink = 1;
e311334e 73static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
7a9b8063 74static int ignore_ctl_error;
1da177e4
LT		 75
76module_param_array(index, int, NULL, 0444);
77MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
78module_param_array(id, charp, NULL, 0444);
79MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
80module_param_array(enable, bool, NULL, 0444);
81MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
82module_param_array(vid, int, NULL, 0444);
83MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
84module_param_array(pid, int, NULL, 0444);
85MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
71d848ca 86module_param(nrpacks, int, 0644);
1da177e4
LT		 87MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
88module_param(async_unlink, bool, 0444);
89MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
e311334e
TLM		 90module_param_array(device_setup, int, NULL, 0444);
91MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
7a9b8063
TI		 92module_param(ignore_ctl_error, bool, 0444);
93MODULE_PARM_DESC(ignore_ctl_error,
94 "Ignore errors from USB controller for mixer interfaces.");
1da177e4
LT		 95
96/*
97 * debug the h/w constraints
98 */
99/* #define HW_CONST_DEBUG */
100
101
102/*
103 *
104 */
105
92b9ac78 106#define MAX_PACKS 20
1da177e4 107#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
15a24c07 108#define MAX_URBS 8
604cf499 109#define SYNC_URBS 4 /* always four urbs for sync */
4d788e04 110#define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */
1da177e4 111
1da177e4
LT		 112struct audioformat {
113 struct list_head list;
114 snd_pcm_format_t format; /* format type */
115 unsigned int channels; /* # channels */
116 unsigned int fmt_type; /* USB audio format type (1-3) */
117 unsigned int frame_size; /* samples per frame for non-audio */
118 int iface; /* interface number */
119 unsigned char altsetting; /* corresponding alternate setting */
120 unsigned char altset_idx; /* array index of altenate setting */
121 unsigned char attributes; /* corresponding attributes of cs endpoint */
122 unsigned char endpoint; /* endpoint */
123 unsigned char ep_attr; /* endpoint attributes */
744b89e5 124 unsigned char datainterval; /* log_2 of data packet interval */
1da177e4
LT		 125 unsigned int maxpacksize; /* max. packet size */
126 unsigned int rates; /* rate bitmasks */
127 unsigned int rate_min, rate_max; /* min/max rates */
128 unsigned int nr_rates; /* number of rate table entries */
129 unsigned int *rate_table; /* rate table */
130};
131
86e07d34
TI		 132struct snd_usb_substream;
133
1da177e4
LT		 134struct snd_urb_ctx {
135 struct urb *urb;
55851f73 136 unsigned int buffer_size; /* size of data buffer, if data URB */
86e07d34 137 struct snd_usb_substream *subs;
1da177e4
LT		 138 int index; /* index for urb array */
139 int packets; /* number of packets per urb */
1da177e4
LT		 140};
141
142struct snd_urb_ops {
86e07d34
TI		 143 int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
144 int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
145 int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
146 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
1da177e4
LT		 147};
148
149struct snd_usb_substream {
86e07d34 150 struct snd_usb_stream *stream;
1da177e4 151 struct usb_device *dev;
86e07d34 152 struct snd_pcm_substream *pcm_substream;
1da177e4
LT		 153 int direction; /* playback or capture */
154 int interface; /* current interface */
155 int endpoint; /* assigned endpoint */
156 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
157 unsigned int cur_rate; /* current rate (for hw_params callback) */
158 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
159 unsigned int format; /* USB data format */
160 unsigned int datapipe; /* the data i/o pipe */
161 unsigned int syncpipe; /* 1 - async out or adaptive in */
573567e0 162 unsigned int datainterval; /* log_2 of data packet interval */
1da177e4
LT		 163 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
164 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
165 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
166 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
167 unsigned int phase; /* phase accumulator */
168 unsigned int maxpacksize; /* max packet size in bytes */
169 unsigned int maxframesize; /* max packet size in frames */
170 unsigned int curpacksize; /* current packet size in bytes (for capture) */
171 unsigned int curframesize; /* current packet size in frames (for capture) */
172 unsigned int fill_max: 1; /* fill max packet size always */
173 unsigned int fmt_type; /* USB audio format type (1-3) */
174
175 unsigned int running: 1; /* running status */
176
1da177e4 177 unsigned int hwptr_done; /* processed frame position in the buffer */
1da177e4
LT		 178 unsigned int transfer_done; /* processed frames since last period update */
179 unsigned long active_mask; /* bitmask of active urbs */
180 unsigned long unlink_mask; /* bitmask of unlinked urbs */
181
182 unsigned int nurbs; /* # urbs */
86e07d34
TI		 183 struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
184 struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
55851f73
CL		 185 char *syncbuf; /* sync buffer for all sync URBs */
186 dma_addr_t sync_dma; /* DMA address of syncbuf */
1da177e4
LT		 187
188 u64 formats; /* format bitmasks (all or'ed) */
189 unsigned int num_formats; /* number of supported audio formats (list) */
190 struct list_head fmt_list; /* format list */
8fec560d 191 struct snd_pcm_hw_constraint_list rate_list; /* limited rates */
1da177e4
LT		 192 spinlock_t lock;
193
194 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
195};
196
197
198struct snd_usb_stream {
86e07d34
TI		 199 struct snd_usb_audio *chip;
200 struct snd_pcm *pcm;
1da177e4
LT		 201 int pcm_index;
202 unsigned int fmt_type; /* USB audio format type (1-3) */
86e07d34 203 struct snd_usb_substream substream[2];
1da177e4
LT		 204 struct list_head list;
205};
206
207
208/*
209 * we keep the snd_usb_audio_t instances by ourselves for merging
210 * the all interfaces on the same card as one sound device.
211 */
212
12aa7579 213static DEFINE_MUTEX(register_mutex);
86e07d34 214static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
1da177e4
LT		 215
216
217/*
218 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
219 * this will overflow at approx 524 kHz
220 */
77933d72 221static inline unsigned get_usb_full_speed_rate(unsigned int rate)
1da177e4
LT		 222{
223 return ((rate << 13) + 62) / 125;
224}
225
226/*
227 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
228 * this will overflow at approx 4 MHz
229 */
77933d72 230static inline unsigned get_usb_high_speed_rate(unsigned int rate)
1da177e4
LT		 231{
232 return ((rate << 10) + 62) / 125;
233}
234
235/* convert our full speed USB rate into sampling rate in Hz */
77933d72 236static inline unsigned get_full_speed_hz(unsigned int usb_rate)
1da177e4
LT		 237{
238 return (usb_rate * 125 + (1 << 12)) >> 13;
239}
240
241/* convert our high speed USB rate into sampling rate in Hz */
77933d72 242static inline unsigned get_high_speed_hz(unsigned int usb_rate)
1da177e4
LT		 243{
244 return (usb_rate * 125 + (1 << 9)) >> 10;
245}
246
247
248/*
249 * prepare urb for full speed capture sync pipe
250 *
251 * fill the length and offset of each urb descriptor.
252 * the fixed 10.14 frequency is passed through the pipe.
253 */
86e07d34
TI		 254static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
255 struct snd_pcm_runtime *runtime,
1da177e4
LT		 256 struct urb *urb)
257{
258 unsigned char *cp = urb->transfer_buffer;
88518275 259 struct snd_urb_ctx *ctx = urb->context;
1da177e4 260
1da177e4 261 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 262 urb->iso_frame_desc[0].length = 3;
263 urb->iso_frame_desc[0].offset = 0;
264 cp[0] = subs->freqn >> 2;
265 cp[1] = subs->freqn >> 10;
266 cp[2] = subs->freqn >> 18;
1da177e4
LT		 267 return 0;
268}
269
270/*
271 * prepare urb for high speed capture sync pipe
272 *
273 * fill the length and offset of each urb descriptor.
274 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
275 */
86e07d34
TI		 276static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
277 struct snd_pcm_runtime *runtime,
1da177e4
LT		 278 struct urb *urb)
279{
280 unsigned char *cp = urb->transfer_buffer;
88518275 281 struct snd_urb_ctx *ctx = urb->context;
1da177e4 282
1da177e4 283 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 284 urb->iso_frame_desc[0].length = 4;
285 urb->iso_frame_desc[0].offset = 0;
286 cp[0] = subs->freqn;
287 cp[1] = subs->freqn >> 8;
288 cp[2] = subs->freqn >> 16;
289 cp[3] = subs->freqn >> 24;
1da177e4
LT		 290 return 0;
291}
292
293/*
294 * process after capture sync complete
295 * - nothing to do
296 */
86e07d34
TI		 297static int retire_capture_sync_urb(struct snd_usb_substream *subs,
298 struct snd_pcm_runtime *runtime,
1da177e4
LT		 299 struct urb *urb)
300{
301 return 0;
302}
303
304/*
305 * prepare urb for capture data pipe
306 *
307 * fill the offset and length of each descriptor.
308 *
309 * we use a temporary buffer to write the captured data.
310 * since the length of written data is determined by host, we cannot
311 * write onto the pcm buffer directly... the data is thus copied
312 * later at complete callback to the global buffer.
313 */
86e07d34
TI		 314static int prepare_capture_urb(struct snd_usb_substream *subs,
315 struct snd_pcm_runtime *runtime,
1da177e4
LT		 316 struct urb *urb)
317{
318 int i, offs;
88518275 319 struct snd_urb_ctx *ctx = urb->context;
1da177e4
LT		 320
321 offs = 0;
322 urb->dev = ctx->subs->dev; /* we need to set this at each time */
1da177e4
LT		 323 for (i = 0; i < ctx->packets; i++) {
324 urb->iso_frame_desc[i].offset = offs;
325 urb->iso_frame_desc[i].length = subs->curpacksize;
326 offs += subs->curpacksize;
1da177e4 327 }
1da177e4 328 urb->transfer_buffer_length = offs;
b263a9bd 329 urb->number_of_packets = ctx->packets;
1da177e4
LT		 330 return 0;
331}
332
333/*
334 * process after capture complete
335 *
336 * copy the data from each desctiptor to the pcm buffer, and
337 * update the current position.
338 */
86e07d34
TI		 339static int retire_capture_urb(struct snd_usb_substream *subs,
340 struct snd_pcm_runtime *runtime,
1da177e4
LT		 341 struct urb *urb)
342{
343 unsigned long flags;
344 unsigned char *cp;
345 int i;
346 unsigned int stride, len, oldptr;
b263a9bd 347 int period_elapsed = 0;
1da177e4
LT		 348
349 stride = runtime->frame_bits >> 3;
350
351 for (i = 0; i < urb->number_of_packets; i++) {
352 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
353 if (urb->iso_frame_desc[i].status) {
354 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
355 // continue;
356 }
357 len = urb->iso_frame_desc[i].actual_length / stride;
358 if (! len)
359 continue;
360 /* update the current pointer */
361 spin_lock_irqsave(&subs->lock, flags);
362 oldptr = subs->hwptr_done;
363 subs->hwptr_done += len;
364 if (subs->hwptr_done >= runtime->buffer_size)
365 subs->hwptr_done -= runtime->buffer_size;
366 subs->transfer_done += len;
b263a9bd
CL		 367 if (subs->transfer_done >= runtime->period_size) {
368 subs->transfer_done -= runtime->period_size;
369 period_elapsed = 1;
370 }
1da177e4
LT		 371 spin_unlock_irqrestore(&subs->lock, flags);
372 /* copy a data chunk */
373 if (oldptr + len > runtime->buffer_size) {
374 unsigned int cnt = runtime->buffer_size - oldptr;
375 unsigned int blen = cnt * stride;
376 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
377 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
378 } else {
379 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
380 }
1da177e4 381 }
b263a9bd
CL		 382 if (period_elapsed)
383 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 384 return 0;
385}
386
e4f8e656
CL		 387/*
388 * Process after capture complete when paused. Nothing to do.
389 */
390static int retire_paused_capture_urb(struct snd_usb_substream *subs,
391 struct snd_pcm_runtime *runtime,
392 struct urb *urb)
393{
394 return 0;
395}
396
1da177e4
LT		 397
398/*
399 * prepare urb for full speed playback sync pipe
400 *
401 * set up the offset and length to receive the current frequency.
402 */
403
86e07d34
TI		 404static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
405 struct snd_pcm_runtime *runtime,
1da177e4
LT		 406 struct urb *urb)
407{
88518275 408 struct snd_urb_ctx *ctx = urb->context;
1da177e4 409
1da177e4 410 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 411 urb->iso_frame_desc[0].length = 3;
412 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 413 return 0;
414}
415
416/*
417 * prepare urb for high speed playback sync pipe
418 *
419 * set up the offset and length to receive the current frequency.
420 */
421
86e07d34
TI		 422static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
423 struct snd_pcm_runtime *runtime,
1da177e4
LT		 424 struct urb *urb)
425{
88518275 426 struct snd_urb_ctx *ctx = urb->context;
1da177e4 427
1da177e4 428 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 429 urb->iso_frame_desc[0].length = 4;
430 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 431 return 0;
432}
433
434/*
435 * process after full speed playback sync complete
436 *
437 * retrieve the current 10.14 frequency from pipe, and set it.
438 * the value is referred in prepare_playback_urb().
439 */
86e07d34
TI		 440static int retire_playback_sync_urb(struct snd_usb_substream *subs,
441 struct snd_pcm_runtime *runtime,
1da177e4
LT		 442 struct urb *urb)
443{
ca81090a 444 unsigned int f;
1da177e4
LT		 445 unsigned long flags;
446
ca81090a
CL		 447 if (urb->iso_frame_desc[0].status == 0 &&
448 urb->iso_frame_desc[0].actual_length == 3) {
449 f = combine_triple((u8*)urb->transfer_buffer) << 2;
50cdbf15
CL		 450 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
451 spin_lock_irqsave(&subs->lock, flags);
452 subs->freqm = f;
453 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4 454 }
1da177e4
LT		 455 }
456
457 return 0;
458}
459
460/*
461 * process after high speed playback sync complete
462 *
463 * retrieve the current 12.13 frequency from pipe, and set it.
464 * the value is referred in prepare_playback_urb().
465 */
86e07d34
TI		 466static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
467 struct snd_pcm_runtime *runtime,
1da177e4
LT		 468 struct urb *urb)
469{
ca81090a 470 unsigned int f;
1da177e4
LT		 471 unsigned long flags;
472
ca81090a
CL		 473 if (urb->iso_frame_desc[0].status == 0 &&
474 urb->iso_frame_desc[0].actual_length == 4) {
475 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
50cdbf15
CL		 476 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
477 spin_lock_irqsave(&subs->lock, flags);
478 subs->freqm = f;
479 spin_unlock_irqrestore(&subs->lock, flags);
480 }
1da177e4
LT		 481 }
482
483 return 0;
484}
485
d513202e 486/*
97c889a7 487 * process after E-Mu 0202/0404/Tracker Pre high speed playback sync complete
d513202e
CL		 488 *
489 * These devices return the number of samples per packet instead of the number
490 * of samples per microframe.
491 */
492static int retire_playback_sync_urb_hs_emu(struct snd_usb_substream *subs,
493 struct snd_pcm_runtime *runtime,
494 struct urb *urb)
495{
496 unsigned int f;
497 unsigned long flags;
498
499 if (urb->iso_frame_desc[0].status == 0 &&
500 urb->iso_frame_desc[0].actual_length == 4) {
501 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
502 f >>= subs->datainterval;
503 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
504 spin_lock_irqsave(&subs->lock, flags);
505 subs->freqm = f;
506 spin_unlock_irqrestore(&subs->lock, flags);
507 }
508 }
509
510 return 0;
511}
512
9568f461
CL		 513/* determine the number of frames in the next packet */
514static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
515{
516 if (subs->fill_max)
517 return subs->maxframesize;
518 else {
519 subs->phase = (subs->phase & 0xffff)
520 + (subs->freqm << subs->datainterval);
521 return min(subs->phase >> 16, subs->maxframesize);
522 }
523}
524
b55bbf06 525/*
e4f8e656 526 * Prepare urb for streaming before playback starts or when paused.
b55bbf06 527 *
b7eb4a06 528 * We don't have any data, so we send silence.
b55bbf06 529 */
e4f8e656
CL		 530static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
531 struct snd_pcm_runtime *runtime,
532 struct urb *urb)
b55bbf06 533{
4b284928 534 unsigned int i, offs, counts;
86e07d34 535 struct snd_urb_ctx *ctx = urb->context;
4b284928 536 int stride = runtime->frame_bits >> 3;
b55bbf06 537
4b284928 538 offs = 0;
b55bbf06 539 urb->dev = ctx->subs->dev;
b7eb4a06 540 for (i = 0; i < ctx->packets; ++i) {
9568f461 541 counts = snd_usb_audio_next_packet_size(subs);
4b284928
CL		 542 urb->iso_frame_desc[i].offset = offs * stride;
543 urb->iso_frame_desc[i].length = counts * stride;
544 offs += counts;
b55bbf06 545 }
b7eb4a06 546 urb->number_of_packets = ctx->packets;
4b284928
CL		 547 urb->transfer_buffer_length = offs * stride;
548 memset(urb->transfer_buffer,
549 subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
550 offs * stride);
b55bbf06
CL		 551 return 0;
552}
553
1da177e4
LT		 554/*
555 * prepare urb for playback data pipe
556 *
7efd8bc8
CL		 557 * Since a URB can handle only a single linear buffer, we must use double
558 * buffering when the data to be transferred overflows the buffer boundary.
559 * To avoid inconsistencies when updating hwptr_done, we use double buffering
560 * for all URBs.
1da177e4 561 */
86e07d34
TI		 562static int prepare_playback_urb(struct snd_usb_substream *subs,
563 struct snd_pcm_runtime *runtime,
1da177e4
LT		 564 struct urb *urb)
565{
566 int i, stride, offs;
567 unsigned int counts;
568 unsigned long flags;
7efd8bc8 569 int period_elapsed = 0;
88518275 570 struct snd_urb_ctx *ctx = urb->context;
1da177e4
LT		 571
572 stride = runtime->frame_bits >> 3;
573
574 offs = 0;
575 urb->dev = ctx->subs->dev; /* we need to set this at each time */
576 urb->number_of_packets = 0;
577 spin_lock_irqsave(&subs->lock, flags);
578 for (i = 0; i < ctx->packets; i++) {
9568f461 579 counts = snd_usb_audio_next_packet_size(subs);
1da177e4
LT		 580 /* set up descriptor */
581 urb->iso_frame_desc[i].offset = offs * stride;
582 urb->iso_frame_desc[i].length = counts * stride;
583 offs += counts;
584 urb->number_of_packets++;
7efd8bc8
CL		 585 subs->transfer_done += counts;
586 if (subs->transfer_done >= runtime->period_size) {
587 subs->transfer_done -= runtime->period_size;
588 period_elapsed = 1;
1da177e4 589 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
7efd8bc8
CL		 590 if (subs->transfer_done > 0) {
591 /* FIXME: fill-max mode is not
592 * supported yet */
593 offs -= subs->transfer_done;
594 counts -= subs->transfer_done;
595 urb->iso_frame_desc[i].length =
596 counts * stride;
597 subs->transfer_done = 0;
1da177e4
LT		 598 }
599 i++;
600 if (i < ctx->packets) {
601 /* add a transfer delimiter */
7efd8bc8
CL		 602 urb->iso_frame_desc[i].offset =
603 offs * stride;
1da177e4
LT		 604 urb->iso_frame_desc[i].length = 0;
605 urb->number_of_packets++;
606 }
9624ea81 607 break;
1da177e4 608 }
1da177e4 609 }
a7d9c099 610 if (period_elapsed) /* finish at the period boundary */
9624ea81 611 break;
1da177e4 612 }
7efd8bc8
CL		 613 if (subs->hwptr_done + offs > runtime->buffer_size) {
614 /* err, the transferred area goes over buffer boundary. */
615 unsigned int len = runtime->buffer_size - subs->hwptr_done;
616 memcpy(urb->transfer_buffer,
617 runtime->dma_area + subs->hwptr_done * stride,
618 len * stride);
619 memcpy(urb->transfer_buffer + len * stride,
620 runtime->dma_area,
621 (offs - len) * stride);
1da177e4 622 } else {
7efd8bc8
CL		 623 memcpy(urb->transfer_buffer,
624 runtime->dma_area + subs->hwptr_done * stride,
625 offs * stride);
1da177e4 626 }
7efd8bc8
CL		 627 subs->hwptr_done += offs;
628 if (subs->hwptr_done >= runtime->buffer_size)
629 subs->hwptr_done -= runtime->buffer_size;
ae1ec5e1 630 runtime->delay += offs;
1da177e4
LT		 631 spin_unlock_irqrestore(&subs->lock, flags);
632 urb->transfer_buffer_length = offs * stride;
b55bbf06
CL		 633 if (period_elapsed)
634 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 635 return 0;
636}
637
638/*
639 * process after playback data complete
ae1ec5e1 640 * - decrease the delay count again
1da177e4 641 */
86e07d34
TI		 642static int retire_playback_urb(struct snd_usb_substream *subs,
643 struct snd_pcm_runtime *runtime,
1da177e4
LT		 644 struct urb *urb)
645{
ae1ec5e1
TI		 646 unsigned long flags;
647 int stride = runtime->frame_bits >> 3;
648 int processed = urb->transfer_buffer_length / stride;
649
650 spin_lock_irqsave(&subs->lock, flags);
651 if (processed > runtime->delay)
652 runtime->delay = 0;
653 else
654 runtime->delay -= processed;
655 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4
LT		 656 return 0;
657}
658
659
660/*
661 */
662static struct snd_urb_ops audio_urb_ops[2] = {
663 {
e4f8e656 664 .prepare = prepare_nodata_playback_urb,
1da177e4
LT		 665 .retire = retire_playback_urb,
666 .prepare_sync = prepare_playback_sync_urb,
667 .retire_sync = retire_playback_sync_urb,
668 },
669 {
670 .prepare = prepare_capture_urb,
671 .retire = retire_capture_urb,
672 .prepare_sync = prepare_capture_sync_urb,
673 .retire_sync = retire_capture_sync_urb,
674 },
675};
676
677static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
678 {
e4f8e656 679 .prepare = prepare_nodata_playback_urb,
1da177e4
LT		 680 .retire = retire_playback_urb,
681 .prepare_sync = prepare_playback_sync_urb_hs,
682 .retire_sync = retire_playback_sync_urb_hs,
683 },
684 {
685 .prepare = prepare_capture_urb,
686 .retire = retire_capture_urb,
687 .prepare_sync = prepare_capture_sync_urb_hs,
688 .retire_sync = retire_capture_sync_urb,
689 },
690};
691
692/*
693 * complete callback from data urb
694 */
7d12e780 695static void snd_complete_urb(struct urb *urb)
1da177e4 696{
88518275 697 struct snd_urb_ctx *ctx = urb->context;
86e07d34
TI		 698 struct snd_usb_substream *subs = ctx->subs;
699 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 700 int err = 0;
701
702 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
07f51a72 703 !subs->running || /* can be stopped during retire callback */
1da177e4
LT		 704 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
705 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
706 clear_bit(ctx->index, &subs->active_mask);
707 if (err < 0) {
708 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
709 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
710 }
711 }
712}
713
714
715/*
716 * complete callback from sync urb
717 */
7d12e780 718static void snd_complete_sync_urb(struct urb *urb)
1da177e4 719{
88518275 720 struct snd_urb_ctx *ctx = urb->context;
86e07d34
TI		 721 struct snd_usb_substream *subs = ctx->subs;
722 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 723 int err = 0;
724
725 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
07f51a72 726 !subs->running || /* can be stopped during retire callback */
1da177e4
LT		 727 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
728 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
729 clear_bit(ctx->index + 16, &subs->active_mask);
730 if (err < 0) {
731 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
732 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
733 }
734 }
735}
736
737
6207e51b 738/* get the physical page pointer at the given offset */
86e07d34 739static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
6207e51b
CL		 740 unsigned long offset)
741{
742 void *pageptr = subs->runtime->dma_area + offset;
743 return vmalloc_to_page(pageptr);
744}
745
746/* allocate virtual buffer; may be called more than once */
86e07d34 747static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
6207e51b 748{
86e07d34 749 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b
CL		 750 if (runtime->dma_area) {
751 if (runtime->dma_bytes >= size)
752 return 0; /* already large enough */
b1d5776d 753 vfree(runtime->dma_area);
6207e51b 754 }
3e85fd61 755 runtime->dma_area = vmalloc_user(size);
07f51a72 756 if (!runtime->dma_area)
6207e51b
CL		 757 return -ENOMEM;
758 runtime->dma_bytes = size;
759 return 0;
760}
761
762/* free virtual buffer; may be called more than once */
86e07d34 763static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
6207e51b 764{
86e07d34 765 struct snd_pcm_runtime *runtime = subs->runtime;
9c4be3d3
JJ		 766
767 vfree(runtime->dma_area);
768 runtime->dma_area = NULL;
6207e51b
CL		 769 return 0;
770}
771
772
1da177e4
LT		 773/*
774 * unlink active urbs.
775 */
86e07d34 776static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
1da177e4
LT		 777{
778 unsigned int i;
779 int async;
780
781 subs->running = 0;
782
783 if (!force && subs->stream->chip->shutdown) /* to be sure... */
784 return -EBADFD;
785
786 async = !can_sleep && async_unlink;
787
07f51a72 788 if (!async && in_interrupt())
1da177e4
LT		 789 return 0;
790
791 for (i = 0; i < subs->nurbs; i++) {
792 if (test_bit(i, &subs->active_mask)) {
07f51a72 793 if (!test_and_set_bit(i, &subs->unlink_mask)) {
1da177e4 794 struct urb *u = subs->dataurb[i].urb;
b375a049 795 if (async)
1da177e4 796 usb_unlink_urb(u);
b375a049 797 else
1da177e4
LT		 798 usb_kill_urb(u);
799 }
800 }
801 }
802 if (subs->syncpipe) {
803 for (i = 0; i < SYNC_URBS; i++) {
804 if (test_bit(i+16, &subs->active_mask)) {
07f51a72 805 if (!test_and_set_bit(i+16, &subs->unlink_mask)) {
1da177e4 806 struct urb *u = subs->syncurb[i].urb;
b375a049 807 if (async)
1da177e4 808 usb_unlink_urb(u);
b375a049 809 else
1da177e4
LT		 810 usb_kill_urb(u);
811 }
812 }
813 }
814 }
815 return 0;
816}
817
818
32e19e88
CL		 819static const char *usb_error_string(int err)
820{
821 switch (err) {
822 case -ENODEV:
823 return "no device";
824 case -ENOENT:
825 return "endpoint not enabled";
826 case -EPIPE:
827 return "endpoint stalled";
828 case -ENOSPC:
829 return "not enough bandwidth";
830 case -ESHUTDOWN:
831 return "device disabled";
832 case -EHOSTUNREACH:
833 return "device suspended";
834 case -EINVAL:
835 case -EAGAIN:
836 case -EFBIG:
837 case -EMSGSIZE:
838 return "internal error";
839 default:
840 return "unknown error";
841 }
842}
843
1da177e4
LT		 844/*
845 * set up and start data/sync urbs
846 */
86e07d34 847static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
1da177e4
LT		 848{
849 unsigned int i;
850 int err;
851
852 if (subs->stream->chip->shutdown)
853 return -EBADFD;
854
855 for (i = 0; i < subs->nurbs; i++) {
5e246b85
TI		 856 if (snd_BUG_ON(!subs->dataurb[i].urb))
857 return -EINVAL;
1da177e4
LT		 858 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
859 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
860 goto __error;
861 }
862 }
863 if (subs->syncpipe) {
864 for (i = 0; i < SYNC_URBS; i++) {
5e246b85
TI		 865 if (snd_BUG_ON(!subs->syncurb[i].urb))
866 return -EINVAL;
1da177e4
LT		 867 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
868 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
869 goto __error;
870 }
871 }
872 }
873
874 subs->active_mask = 0;
875 subs->unlink_mask = 0;
876 subs->running = 1;
877 for (i = 0; i < subs->nurbs; i++) {
32e19e88
CL		 878 err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC);
879 if (err < 0) {
880 snd_printk(KERN_ERR "cannot submit datapipe "
881 "for urb %d, error %d: %s\n",
882 i, err, usb_error_string(err));
1da177e4
LT		 883 goto __error;
884 }
885 set_bit(i, &subs->active_mask);
886 }
887 if (subs->syncpipe) {
888 for (i = 0; i < SYNC_URBS; i++) {
32e19e88
CL		 889 err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC);
890 if (err < 0) {
891 snd_printk(KERN_ERR "cannot submit syncpipe "
892 "for urb %d, error %d: %s\n",
893 i, err, usb_error_string(err));
1da177e4
LT		 894 goto __error;
895 }
896 set_bit(i + 16, &subs->active_mask);
897 }
898 }
899 return 0;
900
901 __error:
902 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
903 deactivate_urbs(subs, 0, 0);
904 return -EPIPE;
905}
906
907
908/*
909 * wait until all urbs are processed.
910 */
86e07d34 911static int wait_clear_urbs(struct snd_usb_substream *subs)
1da177e4 912{
b27c187f 913 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 914 unsigned int i;
915 int alive;
916
917 do {
918 alive = 0;
919 for (i = 0; i < subs->nurbs; i++) {
920 if (test_bit(i, &subs->active_mask))
921 alive++;
922 }
923 if (subs->syncpipe) {
924 for (i = 0; i < SYNC_URBS; i++) {
925 if (test_bit(i + 16, &subs->active_mask))
926 alive++;
927 }
928 }
929 if (! alive)
930 break;
8433a509 931 schedule_timeout_uninterruptible(1);
b27c187f 932 } while (time_before(jiffies, end_time));
1da177e4
LT		 933 if (alive)
934 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
935 return 0;
936}
937
938
939/*
940 * return the current pcm pointer. just return the hwptr_done value.
941 */
86e07d34 942static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 943{
86e07d34 944 struct snd_usb_substream *subs;
daa150ef
CL		 945 snd_pcm_uframes_t hwptr_done;
946
86e07d34 947 subs = (struct snd_usb_substream *)substream->runtime->private_data;
daa150ef
CL		 948 spin_lock(&subs->lock);
949 hwptr_done = subs->hwptr_done;
950 spin_unlock(&subs->lock);
951 return hwptr_done;
1da177e4
LT		 952}
953
954
955/*
b55bbf06 956 * start/stop playback substream
1da177e4 957 */
86e07d34 958static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
b55bbf06 959 int cmd)
1da177e4 960{
86e07d34 961 struct snd_usb_substream *subs = substream->runtime->private_data;
b55bbf06
CL		 962
963 switch (cmd) {
964 case SNDRV_PCM_TRIGGER_START:
e4f8e656 965 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
b55bbf06
CL		 966 subs->ops.prepare = prepare_playback_urb;
967 return 0;
968 case SNDRV_PCM_TRIGGER_STOP:
969 return deactivate_urbs(subs, 0, 0);
e4f8e656
CL		 970 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
971 subs->ops.prepare = prepare_nodata_playback_urb;
972 return 0;
b55bbf06
CL		 973 default:
974 return -EINVAL;
975 }
976}
977
978/*
979 * start/stop capture substream
980 */
86e07d34 981static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
b55bbf06
CL		 982 int cmd)
983{
86e07d34 984 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 985
986 switch (cmd) {
987 case SNDRV_PCM_TRIGGER_START:
e4f8e656 988 subs->ops.retire = retire_capture_urb;
b55bbf06 989 return start_urbs(subs, substream->runtime);
1da177e4 990 case SNDRV_PCM_TRIGGER_STOP:
b55bbf06 991 return deactivate_urbs(subs, 0, 0);
e4f8e656
CL		 992 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
993 subs->ops.retire = retire_paused_capture_urb;
994 return 0;
995 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
996 subs->ops.retire = retire_capture_urb;
997 return 0;
1da177e4 998 default:
b55bbf06 999 return -EINVAL;
1da177e4 1000 }
1da177e4
LT		 1001}
1002
1003
1004/*
1005 * release a urb data
1006 */
86e07d34 1007static void release_urb_ctx(struct snd_urb_ctx *u)
1da177e4
LT		 1008{
1009 if (u->urb) {
55851f73
CL		 1010 if (u->buffer_size)
1011 usb_buffer_free(u->subs->dev, u->buffer_size,
1012 u->urb->transfer_buffer,
1013 u->urb->transfer_dma);
1da177e4
LT		 1014 usb_free_urb(u->urb);
1015 u->urb = NULL;
1016 }
1da177e4
LT		 1017}
1018
1019/*
1020 * release a substream
1021 */
86e07d34 1022static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1da177e4
LT		 1023{
1024 int i;
1025
1026 /* stop urbs (to be sure) */
1027 deactivate_urbs(subs, force, 1);
1028 wait_clear_urbs(subs);
1029
1030 for (i = 0; i < MAX_URBS; i++)
1031 release_urb_ctx(&subs->dataurb[i]);
1032 for (i = 0; i < SYNC_URBS; i++)
1033 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 1034 usb_buffer_free(subs->dev, SYNC_URBS * 4,
1035 subs->syncbuf, subs->sync_dma);
1036 subs->syncbuf = NULL;
1da177e4
LT		 1037 subs->nurbs = 0;
1038}
1039
1040/*
1041 * initialize a substream for plaback/capture
1042 */
86e07d34 1043static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1da177e4
LT		 1044 unsigned int rate, unsigned int frame_bits)
1045{
160389c8 1046 unsigned int maxsize, i;
1da177e4 1047 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
160389c8 1048 unsigned int urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 1049
1050 /* calculate the frequency in 16.16 format */
1051 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1052 subs->freqn = get_usb_full_speed_rate(rate);
1053 else
1054 subs->freqn = get_usb_high_speed_rate(rate);
1055 subs->freqm = subs->freqn;
573567e0
CL		 1056 /* calculate max. frequency */
1057 if (subs->maxpacksize) {
1058 /* whatever fits into a max. size packet */
1da177e4 1059 maxsize = subs->maxpacksize;
573567e0
CL		 1060 subs->freqmax = (maxsize / (frame_bits >> 3))
1061 << (16 - subs->datainterval);
1062 } else {
1063 /* no max. packet size: just take 25% higher than nominal */
1064 subs->freqmax = subs->freqn + (subs->freqn >> 2);
1065 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
1066 >> (16 - subs->datainterval);
1da177e4 1067 }
573567e0 1068 subs->phase = 0;
1da177e4
LT		 1069
1070 if (subs->fill_max)
1071 subs->curpacksize = subs->maxpacksize;
1072 else
1073 subs->curpacksize = maxsize;
1074
a93bf990
CL		 1075 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
1076 packs_per_ms = 8 >> subs->datainterval;
1077 else
1078 packs_per_ms = 1;
1079
71d848ca 1080 if (is_playback) {
f3990e61 1081 urb_packs = max(nrpacks, 1);
71d848ca
CL		 1082 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
1083 } else
15a24c07 1084 urb_packs = 1;
a93bf990 1085 urb_packs *= packs_per_ms;
765e8db0 1086 if (subs->syncpipe)
f1e6d3c5 1087 urb_packs = min(urb_packs, 1U << subs->syncinterval);
1da177e4 1088
1da177e4 1089 /* decide how many packets to be used */
15a24c07 1090 if (is_playback) {
4d788e04 1091 unsigned int minsize, maxpacks;
d6db392e
CL		 1092 /* determine how small a packet can be */
1093 minsize = (subs->freqn >> (16 - subs->datainterval))
1094 * (frame_bits >> 3);
7efd8bc8 1095 /* with sync from device, assume it can be 12% lower */
d6db392e 1096 if (subs->syncpipe)
7efd8bc8 1097 minsize -= minsize >> 3;
d6db392e
CL		 1098 minsize = max(minsize, 1u);
1099 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990 1100 /* we need at least two URBs for queueing */
a7d9c099
CL		 1101 if (total_packs < 2) {
1102 total_packs = 2;
f3990e61 1103 } else {
4d788e04 1104 /* and we don't want too long a queue either */
b1c86bb8
CL		 1105 maxpacks = max(MAX_QUEUE * packs_per_ms, urb_packs * 2);
1106 total_packs = min(total_packs, maxpacks);
4d788e04 1107 }
15a24c07 1108 } else {
a7d9c099
CL		 1109 while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
1110 urb_packs >>= 1;
15a24c07
CL		 1111 total_packs = MAX_URBS * urb_packs;
1112 }
1da177e4
LT		 1113 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1114 if (subs->nurbs > MAX_URBS) {
1115 /* too much... */
1116 subs->nurbs = MAX_URBS;
1117 total_packs = MAX_URBS * urb_packs;
160389c8 1118 } else if (subs->nurbs < 2) {
1da177e4
LT		 1119 /* too little - we need at least two packets
1120 * to ensure contiguous playback/capture
1121 */
1122 subs->nurbs = 2;
1da177e4
LT		 1123 }
1124
1125 /* allocate and initialize data urbs */
1126 for (i = 0; i < subs->nurbs; i++) {
86e07d34 1127 struct snd_urb_ctx *u = &subs->dataurb[i];
1da177e4
LT		 1128 u->index = i;
1129 u->subs = subs;
160389c8
CL		 1130 u->packets = (i + 1) * total_packs / subs->nurbs
1131 - i * total_packs / subs->nurbs;
55851f73 1132 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1133 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1134 u->packets++; /* for transfer delimiter */
1da177e4 1135 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
07f51a72 1136 if (!u->urb)
55851f73
CL		 1137 goto out_of_memory;
1138 u->urb->transfer_buffer =
1139 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1140 &u->urb->transfer_dma);
07f51a72 1141 if (!u->urb->transfer_buffer)
55851f73 1142 goto out_of_memory;
1da177e4 1143 u->urb->pipe = subs->datapipe;
55851f73 1144 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1145 u->urb->interval = 1 << subs->datainterval;
1da177e4 1146 u->urb->context = u;
3527a008 1147 u->urb->complete = snd_complete_urb;
1da177e4
LT		 1148 }
1149
1150 if (subs->syncpipe) {
1151 /* allocate and initialize sync urbs */
55851f73
CL		 1152 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1153 GFP_KERNEL, &subs->sync_dma);
07f51a72 1154 if (!subs->syncbuf)
55851f73 1155 goto out_of_memory;
1da177e4 1156 for (i = 0; i < SYNC_URBS; i++) {
86e07d34 1157 struct snd_urb_ctx *u = &subs->syncurb[i];
1da177e4
LT		 1158 u->index = i;
1159 u->subs = subs;
ca81090a
CL		 1160 u->packets = 1;
1161 u->urb = usb_alloc_urb(1, GFP_KERNEL);
07f51a72 1162 if (!u->urb)
55851f73 1163 goto out_of_memory;
ca81090a 1164 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1165 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1166 u->urb->transfer_buffer_length = 4;
1da177e4 1167 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1168 u->urb->transfer_flags = URB_ISO_ASAP |
1169 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1170 u->urb->number_of_packets = 1;
1149a64f 1171 u->urb->interval = 1 << subs->syncinterval;
1da177e4 1172 u->urb->context = u;
3527a008 1173 u->urb->complete = snd_complete_sync_urb;
1da177e4
LT		 1174 }
1175 }
1176 return 0;
55851f73
CL		 1177
1178out_of_memory:
1179 release_substream_urbs(subs, 0);
1180 return -ENOMEM;
1da177e4
LT		 1181}
1182
1183
1184/*
1185 * find a matching audio format
1186 */
86e07d34 1187static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1da177e4
LT		 1188 unsigned int rate, unsigned int channels)
1189{
1190 struct list_head *p;
1191 struct audioformat *found = NULL;
1192 int cur_attr = 0, attr;
1193
1194 list_for_each(p, &subs->fmt_list) {
1195 struct audioformat *fp;
1196 fp = list_entry(p, struct audioformat, list);
1197 if (fp->format != format || fp->channels != channels)
1198 continue;
1199 if (rate < fp->rate_min || rate > fp->rate_max)
1200 continue;
1201 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1202 unsigned int i;
1203 for (i = 0; i < fp->nr_rates; i++)
1204 if (fp->rate_table[i] == rate)
1205 break;
1206 if (i >= fp->nr_rates)
1207 continue;
1208 }
1209 attr = fp->ep_attr & EP_ATTR_MASK;
1210 if (! found) {
1211 found = fp;
1212 cur_attr = attr;
1213 continue;
1214 }
1215 /* avoid async out and adaptive in if the other method
1216 * supports the same format.
1217 * this is a workaround for the case like
1218 * M-audio audiophile USB.
1219 */
1220 if (attr != cur_attr) {
1221 if ((attr == EP_ATTR_ASYNC &&
1222 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1223 (attr == EP_ATTR_ADAPTIVE &&
1224 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1225 continue;
1226 if ((cur_attr == EP_ATTR_ASYNC &&
1227 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1228 (cur_attr == EP_ATTR_ADAPTIVE &&
1229 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1230 found = fp;
1231 cur_attr = attr;
1232 continue;
1233 }
1234 }
1235 /* find the format with the largest max. packet size */
1236 if (fp->maxpacksize > found->maxpacksize) {
1237 found = fp;
1238 cur_attr = attr;
1239 }
1240 }
1241 return found;
1242}
1243
1244
1245/*
1246 * initialize the picth control and sample rate
1247 */
1248static int init_usb_pitch(struct usb_device *dev, int iface,
1249 struct usb_host_interface *alts,
1250 struct audioformat *fmt)
1251{
1252 unsigned int ep;
1253 unsigned char data[1];
1254 int err;
1255
1256 ep = get_endpoint(alts, 0)->bEndpointAddress;
1257 /* if endpoint has pitch control, enable it */
1258 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1259 data[0] = 1;
1260 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1261 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1262 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1263 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1264 dev->devnum, iface, ep);
1265 return err;
1266 }
1267 }
1268 return 0;
1269}
1270
1271static int init_usb_sample_rate(struct usb_device *dev, int iface,
1272 struct usb_host_interface *alts,
1273 struct audioformat *fmt, int rate)
1274{
1275 unsigned int ep;
1276 unsigned char data[3];
1277 int err;
1278
1279 ep = get_endpoint(alts, 0)->bEndpointAddress;
1280 /* if endpoint has sampling rate control, set it */
1281 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1282 int crate;
1283 data[0] = rate;
1284 data[1] = rate >> 8;
1285 data[2] = rate >> 16;
1286 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1287 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1288 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
b9d710b3 1289 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep %#x\n",
1da177e4
LT		 1290 dev->devnum, iface, fmt->altsetting, rate, ep);
1291 return err;
1292 }
1293 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1294 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1295 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
b9d710b3 1296 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep %#x\n",
1da177e4
LT		 1297 dev->devnum, iface, fmt->altsetting, ep);
1298 return 0; /* some devices don't support reading */
1299 }
1300 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1301 if (crate != rate) {
1302 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1303 // runtime->rate = crate;
1304 }
1305 }
1306 return 0;
1307}
1308
1309/*
1310 * find a matching format and set up the interface
1311 */
86e07d34 1312static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1da177e4
LT		 1313{
1314 struct usb_device *dev = subs->dev;
1315 struct usb_host_interface *alts;
1316 struct usb_interface_descriptor *altsd;
1317 struct usb_interface *iface;
1318 unsigned int ep, attr;
1319 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1320 int err;
1321
1322 iface = usb_ifnum_to_if(dev, fmt->iface);
5e246b85
TI		 1323 if (WARN_ON(!iface))
1324 return -EINVAL;
1da177e4
LT		 1325 alts = &iface->altsetting[fmt->altset_idx];
1326 altsd = get_iface_desc(alts);
5e246b85
TI		 1327 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
1328 return -EINVAL;
1da177e4
LT		 1329
1330 if (fmt == subs->cur_audiofmt)
1331 return 0;
1332
1333 /* close the old interface */
1334 if (subs->interface >= 0 && subs->interface != fmt->iface) {
5149fe2c
ON		 1335 if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
1336 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
1337 dev->devnum, fmt->iface, fmt->altsetting);
1338 return -EIO;
1339 }
1da177e4
LT		 1340 subs->interface = -1;
1341 subs->format = 0;
1342 }
1343
1344 /* set interface */
1345 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1346 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1347 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1348 dev->devnum, fmt->iface, fmt->altsetting);
1349 return -EIO;
1350 }
1351 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1352 subs->interface = fmt->iface;
1353 subs->format = fmt->altset_idx;
1354 }
1355
1356 /* create a data pipe */
1357 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1358 if (is_playback)
1359 subs->datapipe = usb_sndisocpipe(dev, ep);
1360 else
1361 subs->datapipe = usb_rcvisocpipe(dev, ep);
744b89e5 1362 subs->datainterval = fmt->datainterval;
1da177e4
LT		 1363 subs->syncpipe = subs->syncinterval = 0;
1364 subs->maxpacksize = fmt->maxpacksize;
1365 subs->fill_max = 0;
1366
1367 /* we need a sync pipe in async OUT or adaptive IN mode */
1368 /* check the number of EP, since some devices have broken
1369 * descriptors which fool us. if it has only one EP,
1370 * assume it as adaptive-out or sync-in.
1371 */
1372 attr = fmt->ep_attr & EP_ATTR_MASK;
1373 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1374 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1375 altsd->bNumEndpoints >= 2) {
1376 /* check sync-pipe endpoint */
1377 /* ... and check descriptor size before accessing bSynchAddress
1378 because there is a version of the SB Audigy 2 NX firmware lacking
1379 the audio fields in the endpoint descriptors */
1380 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1381 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1382 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1383 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1384 dev->devnum, fmt->iface, fmt->altsetting);
1385 return -EINVAL;
1386 }
1387 ep = get_endpoint(alts, 1)->bEndpointAddress;
1388 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1389 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1390 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1391 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1392 dev->devnum, fmt->iface, fmt->altsetting);
1393 return -EINVAL;
1394 }
1395 ep &= USB_ENDPOINT_NUMBER_MASK;
1396 if (is_playback)
1397 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1398 else
1399 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1400 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1401 get_endpoint(alts, 1)->bRefresh >= 1 &&
1402 get_endpoint(alts, 1)->bRefresh <= 9)
1403 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1404 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1405 subs->syncinterval = 1;
604cf499
CL		 1406 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1407 get_endpoint(alts, 1)->bInterval <= 16)
1408 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1409 else
1410 subs->syncinterval = 3;
1da177e4
LT		 1411 }
1412
1413 /* always fill max packet size */
1414 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1415 subs->fill_max = 1;
1416
1417 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1418 return err;
1419
1420 subs->cur_audiofmt = fmt;
1421
1422#if 0
54530bde
TI		 1423 printk(KERN_DEBUG
1424 "setting done: format = %d, rate = %d..%d, channels = %d\n",
2a56f51b 1425 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
54530bde
TI		 1426 printk(KERN_DEBUG
1427 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
1da177e4
LT		 1428 subs->datapipe, subs->syncpipe);
1429#endif
1430
1431 return 0;
1432}
1433
1434/*
1435 * hw_params callback
1436 *
1437 * allocate a buffer and set the given audio format.
1438 *
1439 * so far we use a physically linear buffer although packetize transfer
1440 * doesn't need a continuous area.
1441 * if sg buffer is supported on the later version of alsa, we'll follow
1442 * that.
1443 */
86e07d34
TI		 1444static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1445 struct snd_pcm_hw_params *hw_params)
1da177e4 1446{
88518275 1447 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 1448 struct audioformat *fmt;
1449 unsigned int channels, rate, format;
1450 int ret, changed;
1451
6207e51b
CL		 1452 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1453 params_buffer_bytes(hw_params));
1da177e4
LT		 1454 if (ret < 0)
1455 return ret;
1456
1457 format = params_format(hw_params);
1458 rate = params_rate(hw_params);
1459 channels = params_channels(hw_params);
1460 fmt = find_format(subs, format, rate, channels);
07f51a72 1461 if (!fmt) {
b9d710b3 1462 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
21a3479a 1463 format, rate, channels);
1da177e4
LT		 1464 return -EINVAL;
1465 }
1466
1467 changed = subs->cur_audiofmt != fmt ||
1468 subs->period_bytes != params_period_bytes(hw_params) ||
1469 subs->cur_rate != rate;
1470 if ((ret = set_format(subs, fmt)) < 0)
1471 return ret;
1472
1473 if (subs->cur_rate != rate) {
1474 struct usb_host_interface *alts;
1475 struct usb_interface *iface;
1476 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1477 alts = &iface->altsetting[fmt->altset_idx];
1478 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1479 if (ret < 0)
1480 return ret;
1481 subs->cur_rate = rate;
1482 }
1483
1484 if (changed) {
1485 /* format changed */
1486 release_substream_urbs(subs, 0);
1487 /* influenced: period_bytes, channels, rate, format, */
1488 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1489 params_rate(hw_params),
1490 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1491 }
1492
1493 return ret;
1494}
1495
1496/*
1497 * hw_free callback
1498 *
1499 * reset the audio format and release the buffer
1500 */
86e07d34 1501static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1da177e4 1502{
88518275 1503 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 1504
1505 subs->cur_audiofmt = NULL;
1506 subs->cur_rate = 0;
1507 subs->period_bytes = 0;
de1b8b93
TI		 1508 if (!subs->stream->chip->shutdown)
1509 release_substream_urbs(subs, 0);
6207e51b 1510 return snd_pcm_free_vmalloc_buffer(substream);
1da177e4
LT		 1511}
1512
1513/*
1514 * prepare callback
1515 *
1516 * only a few subtle things...
1517 */
86e07d34 1518static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 1519{
86e07d34
TI		 1520 struct snd_pcm_runtime *runtime = substream->runtime;
1521 struct snd_usb_substream *subs = runtime->private_data;
1da177e4
LT		 1522
1523 if (! subs->cur_audiofmt) {
1524 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1525 return -ENXIO;
1526 }
1527
1528 /* some unit conversions in runtime */
1529 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1530 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1531
1532 /* reset the pointer */
1da177e4 1533 subs->hwptr_done = 0;
1da177e4
LT		 1534 subs->transfer_done = 0;
1535 subs->phase = 0;
ae1ec5e1 1536 runtime->delay = 0;
1da177e4
LT		 1537
1538 /* clear urbs (to be sure) */
1539 deactivate_urbs(subs, 0, 1);
1540 wait_clear_urbs(subs);
1541
b55bbf06
CL		 1542 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1543 * updates for all URBs would happen at the same time when starting */
1544 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
e4f8e656 1545 subs->ops.prepare = prepare_nodata_playback_urb;
b55bbf06
CL		 1546 return start_urbs(subs, runtime);
1547 } else
1548 return 0;
1da177e4
LT		 1549}
1550
1700f308 1551static struct snd_pcm_hardware snd_usb_hardware =
1da177e4 1552{
49045d3d
CL		 1553 .info = SNDRV_PCM_INFO_MMAP |
1554 SNDRV_PCM_INFO_MMAP_VALID |
1555 SNDRV_PCM_INFO_BATCH |
1556 SNDRV_PCM_INFO_INTERLEAVED |
e4f8e656
CL		 1557 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1558 SNDRV_PCM_INFO_PAUSE,
d31cbbfd 1559 .buffer_bytes_max = 1024 * 1024,
1da177e4 1560 .period_bytes_min = 64,
d31cbbfd 1561 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1562 .periods_min = 2,
1563 .periods_max = 1024,
1564};
1565
1566/*
1567 * h/w constraints
1568 */
1569
1570#ifdef HW_CONST_DEBUG
1571#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1572#else
1573#define hwc_debug(fmt, args...) /**/
1574#endif
1575
a7d9c099
CL		 1576static int hw_check_valid_format(struct snd_usb_substream *subs,
1577 struct snd_pcm_hw_params *params,
1578 struct audioformat *fp)
1da177e4 1579{
86e07d34
TI		 1580 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1581 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1582 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
a7d9c099
CL		 1583 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
1584 unsigned int ptime;
1da177e4
LT		 1585
1586 /* check the format */
07f51a72 1587 if (!snd_mask_test(fmts, fp->format)) {
1da177e4
LT		 1588 hwc_debug(" > check: no supported format %d\n", fp->format);
1589 return 0;
1590 }
1591 /* check the channels */
1592 if (fp->channels < ct->min || fp->channels > ct->max) {
1593 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1594 return 0;
1595 }
1596 /* check the rate is within the range */
1597 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1598 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1599 return 0;
1600 }
1601 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1602 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1603 return 0;
1604 }
a7d9c099
CL		 1605 /* check whether the period time is >= the data packet interval */
1606 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) {
1607 ptime = 125 * (1 << fp->datainterval);
1608 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
1609 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
1610 return 0;
1611 }
1612 }
1da177e4
LT		 1613 return 1;
1614}
1615
86e07d34
TI		 1616static int hw_rule_rate(struct snd_pcm_hw_params *params,
1617 struct snd_pcm_hw_rule *rule)
1da177e4 1618{
86e07d34 1619 struct snd_usb_substream *subs = rule->private;
1da177e4 1620 struct list_head *p;
86e07d34 1621 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 1622 unsigned int rmin, rmax;
1623 int changed;
1624
1625 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1626 changed = 0;
1627 rmin = rmax = 0;
1628 list_for_each(p, &subs->fmt_list) {
1629 struct audioformat *fp;
1630 fp = list_entry(p, struct audioformat, list);
a7d9c099 1631 if (!hw_check_valid_format(subs, params, fp))
1da177e4
LT		 1632 continue;
1633 if (changed++) {
1634 if (rmin > fp->rate_min)
1635 rmin = fp->rate_min;
1636 if (rmax < fp->rate_max)
1637 rmax = fp->rate_max;
1638 } else {
1639 rmin = fp->rate_min;
1640 rmax = fp->rate_max;
1641 }
1642 }
1643
07f51a72 1644 if (!changed) {
1da177e4
LT		 1645 hwc_debug(" --> get empty\n");
1646 it->empty = 1;
1647 return -EINVAL;
1648 }
1649
1650 changed = 0;
1651 if (it->min < rmin) {
1652 it->min = rmin;
1653 it->openmin = 0;
1654 changed = 1;
1655 }
1656 if (it->max > rmax) {
1657 it->max = rmax;
1658 it->openmax = 0;
1659 changed = 1;
1660 }
1661 if (snd_interval_checkempty(it)) {
1662 it->empty = 1;
1663 return -EINVAL;
1664 }
1665 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1666 return changed;
1667}
1668
1669
86e07d34
TI		 1670static int hw_rule_channels(struct snd_pcm_hw_params *params,
1671 struct snd_pcm_hw_rule *rule)
1da177e4 1672{
86e07d34 1673 struct snd_usb_substream *subs = rule->private;
1da177e4 1674 struct list_head *p;
86e07d34 1675 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1da177e4
LT		 1676 unsigned int rmin, rmax;
1677 int changed;
1678
1679 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1680 changed = 0;
1681 rmin = rmax = 0;
1682 list_for_each(p, &subs->fmt_list) {
1683 struct audioformat *fp;
1684 fp = list_entry(p, struct audioformat, list);
a7d9c099 1685 if (!hw_check_valid_format(subs, params, fp))
1da177e4
LT		 1686 continue;
1687 if (changed++) {
1688 if (rmin > fp->channels)
1689 rmin = fp->channels;
1690 if (rmax < fp->channels)
1691 rmax = fp->channels;
1692 } else {
1693 rmin = fp->channels;
1694 rmax = fp->channels;
1695 }
1696 }
1697
07f51a72 1698 if (!changed) {
1da177e4
LT		 1699 hwc_debug(" --> get empty\n");
1700 it->empty = 1;
1701 return -EINVAL;
1702 }
1703
1704 changed = 0;
1705 if (it->min < rmin) {
1706 it->min = rmin;
1707 it->openmin = 0;
1708 changed = 1;
1709 }
1710 if (it->max > rmax) {
1711 it->max = rmax;
1712 it->openmax = 0;
1713 changed = 1;
1714 }
1715 if (snd_interval_checkempty(it)) {
1716 it->empty = 1;
1717 return -EINVAL;
1718 }
1719 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1720 return changed;
1721}
1722
86e07d34
TI		 1723static int hw_rule_format(struct snd_pcm_hw_params *params,
1724 struct snd_pcm_hw_rule *rule)
1da177e4 1725{
86e07d34 1726 struct snd_usb_substream *subs = rule->private;
1da177e4 1727 struct list_head *p;
86e07d34 1728 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1729 u64 fbits;
1730 u32 oldbits[2];
1731 int changed;
1732
1733 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1734 fbits = 0;
1735 list_for_each(p, &subs->fmt_list) {
1736 struct audioformat *fp;
1737 fp = list_entry(p, struct audioformat, list);
a7d9c099 1738 if (!hw_check_valid_format(subs, params, fp))
1da177e4
LT		 1739 continue;
1740 fbits |= (1ULL << fp->format);
1741 }
1742
1743 oldbits[0] = fmt->bits[0];
1744 oldbits[1] = fmt->bits[1];
1745 fmt->bits[0] &= (u32)fbits;
1746 fmt->bits[1] &= (u32)(fbits >> 32);
07f51a72 1747 if (!fmt->bits[0] && !fmt->bits[1]) {
1da177e4
LT		 1748 hwc_debug(" --> get empty\n");
1749 return -EINVAL;
1750 }
1751 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1752 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1753 return changed;
1754}
1755
a7d9c099
CL		 1756static int hw_rule_period_time(struct snd_pcm_hw_params *params,
1757 struct snd_pcm_hw_rule *rule)
1758{
1759 struct snd_usb_substream *subs = rule->private;
1760 struct audioformat *fp;
1761 struct snd_interval *it;
1762 unsigned char min_datainterval;
1763 unsigned int pmin;
1764 int changed;
1765
1766 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
1767 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
1768 min_datainterval = 0xff;
1769 list_for_each_entry(fp, &subs->fmt_list, list) {
1770 if (!hw_check_valid_format(subs, params, fp))
1771 continue;
1772 min_datainterval = min(min_datainterval, fp->datainterval);
1773 }
1774 if (min_datainterval == 0xff) {
1775 hwc_debug(" --> get emtpy\n");
1776 it->empty = 1;
1777 return -EINVAL;
1778 }
1779 pmin = 125 * (1 << min_datainterval);
1780 changed = 0;
1781 if (it->min < pmin) {
1782 it->min = pmin;
1783 it->openmin = 0;
1784 changed = 1;
1785 }
1786 if (snd_interval_checkempty(it)) {
1787 it->empty = 1;
1788 return -EINVAL;
1789 }
1790 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
1791 return changed;
1792}
1793
a79eee8d
LR		 1794/*
1795 * If the device supports unusual bit rates, does the request meet these?
1796 */
1797static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1798 struct snd_usb_substream *subs)
1799{
8fec560d
TI		 1800 struct audioformat *fp;
1801 int count = 0, needs_knot = 0;
a79eee8d
LR		 1802 int err;
1803
8fec560d
TI		 1804 list_for_each_entry(fp, &subs->fmt_list, list) {
1805 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1806 return 0;
1807 count += fp->nr_rates;
918f3a0e 1808 if (fp->rates & SNDRV_PCM_RATE_KNOT)
8fec560d 1809 needs_knot = 1;
a79eee8d 1810 }
8fec560d
TI		 1811 if (!needs_knot)
1812 return 0;
1813
1814 subs->rate_list.count = count;
1815 subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
1816 subs->rate_list.mask = 0;
1817 count = 0;
1818 list_for_each_entry(fp, &subs->fmt_list, list) {
1819 int i;
1820 for (i = 0; i < fp->nr_rates; i++)
1821 subs->rate_list.list[count++] = fp->rate_table[i];
1822 }
1823 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1824 &subs->rate_list);
1825 if (err < 0)
1826 return err;
a79eee8d
LR		 1827
1828 return 0;
1829}
1830
1da177e4
LT		 1831
1832/*
1833 * set up the runtime hardware information.
1834 */
1835
86e07d34 1836static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1da177e4
LT		 1837{
1838 struct list_head *p;
a7d9c099
CL		 1839 unsigned int pt, ptmin;
1840 int param_period_time_if_needed;
1da177e4
LT		 1841 int err;
1842
1843 runtime->hw.formats = subs->formats;
1844
1845 runtime->hw.rate_min = 0x7fffffff;
1846 runtime->hw.rate_max = 0;
1847 runtime->hw.channels_min = 256;
1848 runtime->hw.channels_max = 0;
1849 runtime->hw.rates = 0;
a7d9c099 1850 ptmin = UINT_MAX;
1da177e4
LT		 1851 /* check min/max rates and channels */
1852 list_for_each(p, &subs->fmt_list) {
1853 struct audioformat *fp;
1854 fp = list_entry(p, struct audioformat, list);
1855 runtime->hw.rates |= fp->rates;
1856 if (runtime->hw.rate_min > fp->rate_min)
1857 runtime->hw.rate_min = fp->rate_min;
1858 if (runtime->hw.rate_max < fp->rate_max)
1859 runtime->hw.rate_max = fp->rate_max;
1860 if (runtime->hw.channels_min > fp->channels)
1861 runtime->hw.channels_min = fp->channels;
1862 if (runtime->hw.channels_max < fp->channels)
1863 runtime->hw.channels_max = fp->channels;
1864 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1865 /* FIXME: there might be more than one audio formats... */
1866 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1867 fp->frame_size;
1868 }
a7d9c099
CL		 1869 pt = 125 * (1 << fp->datainterval);
1870 ptmin = min(ptmin, pt);
1da177e4
LT		 1871 }
1872
a7d9c099
CL		 1873 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
1874 if (snd_usb_get_speed(subs->dev) != USB_SPEED_HIGH)
1875 /* full speed devices have fixed data packet interval */
1876 ptmin = 1000;
1877 if (ptmin == 1000)
1878 /* if period time doesn't go below 1 ms, no rules needed */
1879 param_period_time_if_needed = -1;
1da177e4 1880 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
a7d9c099 1881 ptmin, UINT_MAX);
1da177e4 1882
4608eb08
CL		 1883 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1884 hw_rule_rate, subs,
1885 SNDRV_PCM_HW_PARAM_FORMAT,
1886 SNDRV_PCM_HW_PARAM_CHANNELS,
a7d9c099 1887 param_period_time_if_needed,
4608eb08
CL		 1888 -1)) < 0)
1889 return err;
1890 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1891 hw_rule_channels, subs,
1892 SNDRV_PCM_HW_PARAM_FORMAT,
1893 SNDRV_PCM_HW_PARAM_RATE,
a7d9c099 1894 param_period_time_if_needed,
4608eb08
CL		 1895 -1)) < 0)
1896 return err;
1897 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1898 hw_rule_format, subs,
1899 SNDRV_PCM_HW_PARAM_RATE,
1900 SNDRV_PCM_HW_PARAM_CHANNELS,
a7d9c099 1901 param_period_time_if_needed,
4608eb08
CL		 1902 -1)) < 0)
1903 return err;
a7d9c099
CL		 1904 if (param_period_time_if_needed >= 0) {
1905 err = snd_pcm_hw_rule_add(runtime, 0,
1906 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1907 hw_rule_period_time, subs,
1908 SNDRV_PCM_HW_PARAM_FORMAT,
1909 SNDRV_PCM_HW_PARAM_CHANNELS,
1910 SNDRV_PCM_HW_PARAM_RATE,
1911 -1);
1912 if (err < 0)
1913 return err;
1914 }
4608eb08 1915 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
5a220c86 1916 return err;
1da177e4
LT		 1917 return 0;
1918}
1919
1700f308 1920static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1da177e4 1921{
86e07d34
TI		 1922 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1923 struct snd_pcm_runtime *runtime = substream->runtime;
1924 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1925
1926 subs->interface = -1;
1927 subs->format = 0;
1700f308 1928 runtime->hw = snd_usb_hardware;
1da177e4
LT		 1929 runtime->private_data = subs;
1930 subs->pcm_substream = substream;
1931 return setup_hw_info(runtime, subs);
1932}
1933
86e07d34 1934static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1da177e4 1935{
86e07d34
TI		 1936 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1937 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1938
1939 if (subs->interface >= 0) {
1940 usb_set_interface(subs->dev, subs->interface, 0);
1941 subs->interface = -1;
1942 }
1943 subs->pcm_substream = NULL;
1944 return 0;
1945}
1946
86e07d34 1947static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1da177e4 1948{
1700f308 1949 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1da177e4
LT		 1950}
1951
86e07d34 1952static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1953{
1954 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1955}
1956
86e07d34 1957static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1da177e4 1958{
1700f308 1959 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1da177e4
LT		 1960}
1961
86e07d34 1962static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1963{
1964 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1965}
1966
86e07d34 1967static struct snd_pcm_ops snd_usb_playback_ops = {
1da177e4
LT		 1968 .open = snd_usb_playback_open,
1969 .close = snd_usb_playback_close,
1970 .ioctl = snd_pcm_lib_ioctl,
1971 .hw_params = snd_usb_hw_params,
1972 .hw_free = snd_usb_hw_free,
1973 .prepare = snd_usb_pcm_prepare,
b55bbf06 1974 .trigger = snd_usb_pcm_playback_trigger,
1da177e4 1975 .pointer = snd_usb_pcm_pointer,
6207e51b 1976 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1977};
1978
86e07d34 1979static struct snd_pcm_ops snd_usb_capture_ops = {
1da177e4
LT		 1980 .open = snd_usb_capture_open,
1981 .close = snd_usb_capture_close,
1982 .ioctl = snd_pcm_lib_ioctl,
1983 .hw_params = snd_usb_hw_params,
1984 .hw_free = snd_usb_hw_free,
1985 .prepare = snd_usb_pcm_prepare,
b55bbf06 1986 .trigger = snd_usb_pcm_capture_trigger,
1da177e4 1987 .pointer = snd_usb_pcm_pointer,
6207e51b 1988 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1989};
1990
1991
1992
1993/*
1994 * helper functions
1995 */
1996
1997/*
1998 * combine bytes and get an integer value
1999 */
2000unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
2001{
2002 switch (size) {
2003 case 1: return *bytes;
2004 case 2: return combine_word(bytes);
2005 case 3: return combine_triple(bytes);
2006 case 4: return combine_quad(bytes);
2007 default: return 0;
2008 }
2009}
2010
2011/*
2012 * parse descriptor buffer and return the pointer starting the given
2013 * descriptor type.
2014 */
2015void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
2016{
2017 u8 *p, *end, *next;
2018
2019 p = descstart;
2020 end = p + desclen;
2021 for (; p < end;) {
2022 if (p[0] < 2)
2023 return NULL;
2024 next = p + p[0];
2025 if (next > end)
2026 return NULL;
2027 if (p[1] == dtype && (!after || (void *)p > after)) {
2028 return p;
2029 }
2030 p = next;
2031 }
2032 return NULL;
2033}
2034
2035/*
2036 * find a class-specified interface descriptor with the given subtype.
2037 */
2038void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
2039{
2040 unsigned char *p = after;
2041
2042 while ((p = snd_usb_find_desc(buffer, buflen, p,
2043 USB_DT_CS_INTERFACE)) != NULL) {
2044 if (p[0] >= 3 && p[2] == dsubtype)
2045 return p;
2046 }
2047 return NULL;
2048}
2049
2050/*
2051 * Wrapper for usb_control_msg().
2052 * Allocates a temp buffer to prevent dmaing from/to the stack.
2053 */
2054int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
2055 __u8 requesttype, __u16 value, __u16 index, void *data,
2056 __u16 size, int timeout)
2057{
2058 int err;
2059 void *buf = NULL;
2060
2061 if (size > 0) {
52978be6 2062 buf = kmemdup(data, size, GFP_KERNEL);
1da177e4
LT		 2063 if (!buf)
2064 return -ENOMEM;
1da177e4
LT		 2065 }
2066 err = usb_control_msg(dev, pipe, request, requesttype,
2067 value, index, buf, size, timeout);
2068 if (size > 0) {
2069 memcpy(data, buf, size);
2070 kfree(buf);
2071 }
2072 return err;
2073}
2074
2075
2076/*
2077 * entry point for linux usb interface
2078 */
2079
2080static int usb_audio_probe(struct usb_interface *intf,
2081 const struct usb_device_id *id);
2082static void usb_audio_disconnect(struct usb_interface *intf);
93521d27
AM		 2083
2084#ifdef CONFIG_PM
f85bf29c
ON		 2085static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message);
2086static int usb_audio_resume(struct usb_interface *intf);
93521d27
AM		 2087#else
2088#define usb_audio_suspend NULL
2089#define usb_audio_resume NULL
2090#endif
1da177e4
LT		 2091
2092static struct usb_device_id usb_audio_ids [] = {
2093#include "usbquirks.h"
2094 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2095 .bInterfaceClass = USB_CLASS_AUDIO,
2096 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
2097 { } /* Terminating entry */
2098};
2099
2100MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2101
2102static struct usb_driver usb_audio_driver = {
1da177e4
LT		 2103 .name = "snd-usb-audio",
2104 .probe = usb_audio_probe,
2105 .disconnect = usb_audio_disconnect,
f85bf29c
ON		 2106 .suspend = usb_audio_suspend,
2107 .resume = usb_audio_resume,
1da177e4
LT		 2108 .id_table = usb_audio_ids,
2109};
2110
2111
727f317a 2112#if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
21a3479a 2113
1da177e4
LT		 2114/*
2115 * proc interface for list the supported pcm formats
2116 */
86e07d34 2117static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2118{
2119 struct list_head *p;
2120 static char *sync_types[4] = {
2121 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2122 };
2123
2124 list_for_each(p, &subs->fmt_list) {
2125 struct audioformat *fp;
2126 fp = list_entry(p, struct audioformat, list);
2127 snd_iprintf(buffer, " Interface %d\n", fp->iface);
2128 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
6e5265ec
TI		 2129 snd_iprintf(buffer, " Format: %s\n",
2130 snd_pcm_format_name(fp->format));
1da177e4
LT		 2131 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
2132 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
2133 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2134 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2135 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2136 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2137 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2138 fp->rate_min, fp->rate_max);
2139 } else {
2140 unsigned int i;
2141 snd_iprintf(buffer, " Rates: ");
2142 for (i = 0; i < fp->nr_rates; i++) {
2143 if (i > 0)
2144 snd_iprintf(buffer, ", ");
2145 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2146 }
2147 snd_iprintf(buffer, "\n");
2148 }
744b89e5
CL		 2149 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
2150 snd_iprintf(buffer, " Data packet interval: %d us\n",
2151 125 * (1 << fp->datainterval));
1da177e4 2152 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
b9d710b3 2153 // snd_iprintf(buffer, " EP Attribute = %#x\n", fp->attributes);
1da177e4
LT		 2154 }
2155}
2156
86e07d34 2157static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2158{
2159 if (subs->running) {
2160 unsigned int i;
2161 snd_iprintf(buffer, " Status: Running\n");
2162 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2163 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2164 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2165 for (i = 0; i < subs->nurbs; i++)
2166 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2167 snd_iprintf(buffer, "]\n");
2168 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2169 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2170 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2171 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2172 : get_high_speed_hz(subs->freqm),
2173 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2174 } else {
2175 snd_iprintf(buffer, " Status: Stop\n");
2176 }
2177}
2178
86e07d34 2179static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 2180{
86e07d34 2181 struct snd_usb_stream *stream = entry->private_data;
1da177e4
LT		 2182
2183 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2184
2185 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2186 snd_iprintf(buffer, "\nPlayback:\n");
2187 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2188 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2189 }
2190 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2191 snd_iprintf(buffer, "\nCapture:\n");
2192 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2193 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2194 }
2195}
2196
86e07d34 2197static void proc_pcm_format_add(struct snd_usb_stream *stream)
1da177e4 2198{
86e07d34 2199 struct snd_info_entry *entry;
1da177e4 2200 char name[32];
86e07d34 2201 struct snd_card *card = stream->chip->card;
1da177e4
LT		 2202
2203 sprintf(name, "stream%d", stream->pcm_index);
07f51a72 2204 if (!snd_card_proc_new(card, name, &entry))
bf850204 2205 snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
1da177e4
LT		 2206}
2207
21a3479a
JK		 2208#else
2209
2210static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
2211{
2212}
2213
2214#endif
1da177e4
LT		 2215
2216/*
2217 * initialize the substream instance.
2218 */
2219
86e07d34 2220static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
1da177e4 2221{
86e07d34 2222 struct snd_usb_substream *subs = &as->substream[stream];
1da177e4
LT		 2223
2224 INIT_LIST_HEAD(&subs->fmt_list);
2225 spin_lock_init(&subs->lock);
2226
2227 subs->stream = as;
2228 subs->direction = stream;
2229 subs->dev = as->chip->dev;
d513202e 2230 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) {
1da177e4 2231 subs->ops = audio_urb_ops[stream];
d513202e 2232 } else {
1da177e4 2233 subs->ops = audio_urb_ops_high_speed[stream];
d513202e
CL		 2234 switch (as->chip->usb_id) {
2235 case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
2236 case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
97c889a7 2237 case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
d513202e
CL		 2238 subs->ops.retire_sync = retire_playback_sync_urb_hs_emu;
2239 break;
2240 }
2241 }
1da177e4
LT		 2242 snd_pcm_set_ops(as->pcm, stream,
2243 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2244 &snd_usb_playback_ops : &snd_usb_capture_ops);
2245
2246 list_add_tail(&fp->list, &subs->fmt_list);
2247 subs->formats |= 1ULL << fp->format;
2248 subs->endpoint = fp->endpoint;
2249 subs->num_formats++;
2250 subs->fmt_type = fp->fmt_type;
2251}
2252
2253
2254/*
2255 * free a substream
2256 */
86e07d34 2257static void free_substream(struct snd_usb_substream *subs)
1da177e4
LT		 2258{
2259 struct list_head *p, *n;
2260
07f51a72 2261 if (!subs->num_formats)
1da177e4
LT		 2262 return; /* not initialized */
2263 list_for_each_safe(p, n, &subs->fmt_list) {
2264 struct audioformat *fp = list_entry(p, struct audioformat, list);
2265 kfree(fp->rate_table);
2266 kfree(fp);
2267 }
8fec560d 2268 kfree(subs->rate_list.list);
1da177e4
LT		 2269}
2270
2271
2272/*
2273 * free a usb stream instance
2274 */
86e07d34 2275static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
1da177e4
LT		 2276{
2277 free_substream(&stream->substream[0]);
2278 free_substream(&stream->substream[1]);
2279 list_del(&stream->list);
2280 kfree(stream);
2281}
2282
86e07d34 2283static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
1da177e4 2284{
86e07d34 2285 struct snd_usb_stream *stream = pcm->private_data;
1da177e4
LT		 2286 if (stream) {
2287 stream->pcm = NULL;
1da177e4
LT		 2288 snd_usb_audio_stream_free(stream);
2289 }
2290}
2291
2292
2293/*
2294 * add this endpoint to the chip instance.
2295 * if a stream with the same endpoint already exists, append to it.
2296 * if not, create a new pcm stream.
2297 */
86e07d34 2298static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
1da177e4
LT		 2299{
2300 struct list_head *p;
86e07d34
TI		 2301 struct snd_usb_stream *as;
2302 struct snd_usb_substream *subs;
2303 struct snd_pcm *pcm;
1da177e4
LT		 2304 int err;
2305
2306 list_for_each(p, &chip->pcm_list) {
86e07d34 2307 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2308 if (as->fmt_type != fp->fmt_type)
2309 continue;
2310 subs = &as->substream[stream];
07f51a72 2311 if (!subs->endpoint)
1da177e4
LT		 2312 continue;
2313 if (subs->endpoint == fp->endpoint) {
2314 list_add_tail(&fp->list, &subs->fmt_list);
2315 subs->num_formats++;
2316 subs->formats |= 1ULL << fp->format;
2317 return 0;
2318 }
2319 }
2320 /* look for an empty stream */
2321 list_for_each(p, &chip->pcm_list) {
86e07d34 2322 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2323 if (as->fmt_type != fp->fmt_type)
2324 continue;
2325 subs = &as->substream[stream];
2326 if (subs->endpoint)
2327 continue;
2328 err = snd_pcm_new_stream(as->pcm, stream, 1);
2329 if (err < 0)
2330 return err;
2331 init_substream(as, stream, fp);
2332 return 0;
2333 }
2334
2335 /* create a new pcm */
59feddb2 2336 as = kzalloc(sizeof(*as), GFP_KERNEL);
07f51a72 2337 if (!as)
1da177e4 2338 return -ENOMEM;
1da177e4
LT		 2339 as->pcm_index = chip->pcm_devs;
2340 as->chip = chip;
2341 as->fmt_type = fp->fmt_type;
2342 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2343 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2344 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2345 &pcm);
2346 if (err < 0) {
2347 kfree(as);
2348 return err;
2349 }
2350 as->pcm = pcm;
2351 pcm->private_data = as;
2352 pcm->private_free = snd_usb_audio_pcm_free;
2353 pcm->info_flags = 0;
2354 if (chip->pcm_devs > 0)
2355 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2356 else
2357 strcpy(pcm->name, "USB Audio");
2358
2359 init_substream(as, stream, fp);
2360
2361 list_add(&as->list, &chip->pcm_list);
2362 chip->pcm_devs++;
2363
2364 proc_pcm_format_add(as);
2365
2366 return 0;
2367}
2368
2369
2370/*
2371 * check if the device uses big-endian samples
2372 */
86e07d34 2373static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1da177e4 2374{
27d10f56
CL		 2375 switch (chip->usb_id) {
2376 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2377 if (fp->endpoint & USB_DIR_IN)
1da177e4 2378 return 1;
27d10f56
CL		 2379 break;
2380 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
f8c78b82
TLM		 2381 if (device_setup[chip->index] == 0x00 ||
2382 fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
2383 return 1;
1da177e4
LT		 2384 }
2385 return 0;
2386}
2387
2388/*
2389 * parse the audio format type I descriptor
2390 * and returns the corresponding pcm format
2391 *
2392 * @dev: usb device
2393 * @fp: audioformat record
2394 * @format: the format tag (wFormatTag)
2395 * @fmt: the format type descriptor
2396 */
86e07d34 2397static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2398 int format, unsigned char *fmt)
2399{
2400 int pcm_format;
2401 int sample_width, sample_bytes;
2402
2403 /* FIXME: correct endianess and sign? */
2404 pcm_format = -1;
2405 sample_width = fmt[6];
2406 sample_bytes = fmt[5];
2407 switch (format) {
2408 case 0: /* some devices don't define this correctly... */
2409 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2410 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2411 /* fall-through */
2412 case USB_AUDIO_FORMAT_PCM:
2413 if (sample_width > sample_bytes * 8) {
2414 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2415 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2416 sample_width, sample_bytes);
2417 }
2418 /* check the format byte size */
2419 switch (fmt[5]) {
2420 case 1:
2421 pcm_format = SNDRV_PCM_FORMAT_S8;
2422 break;
2423 case 2:
27d10f56 2424 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2425 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2426 else
2427 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2428 break;
2429 case 3:
27d10f56 2430 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2431 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2432 else
2433 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2434 break;
2435 case 4:
2436 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2437 break;
2438 default:
2439 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2440 chip->dev->devnum, fp->iface,
2441 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2442 break;
2443 }
2444 break;
2445 case USB_AUDIO_FORMAT_PCM8:
2a56f51b
PM		 2446 pcm_format = SNDRV_PCM_FORMAT_U8;
2447
2448 /* Dallas DS4201 workaround: it advertises U8 format, but really
2449 supports S8. */
27d10f56 2450 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4 2451 pcm_format = SNDRV_PCM_FORMAT_S8;
1da177e4
LT		 2452 break;
2453 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2454 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2455 break;
2456 case USB_AUDIO_FORMAT_ALAW:
2457 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2458 break;
2459 case USB_AUDIO_FORMAT_MU_LAW:
2460 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2461 break;
2462 default:
2463 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2464 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2465 break;
2466 }
2467 return pcm_format;
2468}
2469
2470
2471/*
2472 * parse the format descriptor and stores the possible sample rates
2473 * on the audioformat table.
2474 *
2475 * @dev: usb device
2476 * @fp: audioformat record
2477 * @fmt: the format descriptor
2478 * @offset: the start offset of descriptor pointing the rate type
2479 * (7 for type I and II, 8 for type II)
2480 */
86e07d34 2481static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2482 unsigned char *fmt, int offset)
2483{
2484 int nr_rates = fmt[offset];
918f3a0e 2485
1da177e4
LT		 2486 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2487 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2488 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2489 return -1;
2490 }
2491
2492 if (nr_rates) {
2493 /*
2494 * build the rate table and bitmap flags
2495 */
918f3a0e 2496 int r, idx;
918f3a0e 2497
1da177e4
LT		 2498 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2499 if (fp->rate_table == NULL) {
2500 snd_printk(KERN_ERR "cannot malloc\n");
2501 return -1;
2502 }
2503
0412558c
TI		 2504 fp->nr_rates = 0;
2505 fp->rate_min = fp->rate_max = 0;
1da177e4 2506 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
987411b7 2507 unsigned int rate = combine_triple(&fmt[idx]);
0412558c
TI		 2508 if (!rate)
2509 continue;
987411b7
CL		 2510 /* C-Media CM6501 mislabels its 96 kHz altsetting */
2511 if (rate == 48000 && nr_rates == 1 &&
3b03cc5b
JR		 2512 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
2513 chip->usb_id == USB_ID(0x0d8c, 0x0102)) &&
987411b7
CL		 2514 fp->altsetting == 5 && fp->maxpacksize == 392)
2515 rate = 96000;
0412558c
TI		 2516 fp->rate_table[fp->nr_rates] = rate;
2517 if (!fp->rate_min || rate < fp->rate_min)
1da177e4 2518 fp->rate_min = rate;
0412558c 2519 if (!fp->rate_max || rate > fp->rate_max)
1da177e4 2520 fp->rate_max = rate;
918f3a0e 2521 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
0412558c 2522 fp->nr_rates++;
1da177e4 2523 }
0412558c 2524 if (!fp->nr_rates) {
beb60119
GJ		 2525 hwc_debug("All rates were zero. Skipping format!\n");
2526 return -1;
2527 }
1da177e4
LT		 2528 } else {
2529 /* continuous rates */
2530 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2531 fp->rate_min = combine_triple(&fmt[offset + 1]);
2532 fp->rate_max = combine_triple(&fmt[offset + 4]);
2533 }
2534 return 0;
2535}
2536
2537/*
2538 * parse the format type I and III descriptors
2539 */
86e07d34 2540static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2541 int format, unsigned char *fmt)
2542{
2543 int pcm_format;
2544
2545 if (fmt[3] == USB_FORMAT_TYPE_III) {
2546 /* FIXME: the format type is really IECxxx
2547 * but we give normal PCM format to get the existing
2548 * apps working...
2549 */
cac19c3b
TLM		 2550 switch (chip->usb_id) {
2551
2552 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2553 if (device_setup[chip->index] == 0x00 &&
2554 fp->altsetting == 6)
2555 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
2556 else
2557 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2558 break;
2559 default:
2560 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2561 }
1da177e4 2562 } else {
27d10f56 2563 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2564 if (pcm_format < 0)
2565 return -1;
2566 }
2567 fp->format = pcm_format;
2568 fp->channels = fmt[4];
2569 if (fp->channels < 1) {
2570 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2571 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2572 return -1;
2573 }
27d10f56 2574 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2575}
2576
2577/*
2578 * prase the format type II descriptor
2579 */
86e07d34 2580static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2581 int format, unsigned char *fmt)
2582{
2583 int brate, framesize;
2584 switch (format) {
2585 case USB_AUDIO_FORMAT_AC3:
2586 /* FIXME: there is no AC3 format defined yet */
2587 // fp->format = SNDRV_PCM_FORMAT_AC3;
2588 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2589 break;
2590 case USB_AUDIO_FORMAT_MPEG:
2591 fp->format = SNDRV_PCM_FORMAT_MPEG;
2592 break;
2593 default:
b9d710b3 2594 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag %#x is detected. processed as MPEG.\n",
27d10f56 2595 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2596 fp->format = SNDRV_PCM_FORMAT_MPEG;
2597 break;
2598 }
2599 fp->channels = 1;
2600 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2601 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2602 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2603 fp->frame_size = framesize;
27d10f56 2604 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2605}
2606
86e07d34 2607static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2608 int format, unsigned char *fmt, int stream)
2609{
2610 int err;
2611
2612 switch (fmt[3]) {
2613 case USB_FORMAT_TYPE_I:
2614 case USB_FORMAT_TYPE_III:
27d10f56 2615 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2616 break;
2617 case USB_FORMAT_TYPE_II:
27d10f56 2618 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2619 break;
2620 default:
2621 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2622 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2623 return -1;
2624 }
2625 fp->fmt_type = fmt[3];
2626 if (err < 0)
2627 return err;
2628#if 1
33159378 2629 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
1da177e4
LT		 2630 /* extigy apparently supports sample rates other than 48k
2631 * but not in ordinary way. so we enable only 48k atm.
2632 */
27d10f56 2633 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
33159378
CL		 2634 chip->usb_id == USB_ID(0x041e, 0x3020) ||
2635 chip->usb_id == USB_ID(0x041e, 0x3061)) {
1da177e4 2636 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2637 fp->rates != SNDRV_PCM_RATE_48000 &&
2638 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2639 return -1;
1da177e4
LT		 2640 }
2641#endif
2642 return 0;
2643}
2644
744b89e5
CL		 2645static unsigned char parse_datainterval(struct snd_usb_audio *chip,
2646 struct usb_host_interface *alts)
2647{
2648 if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH &&
2649 get_endpoint(alts, 0)->bInterval >= 1 &&
2650 get_endpoint(alts, 0)->bInterval <= 4)
2651 return get_endpoint(alts, 0)->bInterval - 1;
2652 else
2653 return 0;
2654}
2655
e311334e
TLM		 2656static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
2657 int iface, int altno);
86e07d34 2658static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
1da177e4
LT		 2659{
2660 struct usb_device *dev;
2661 struct usb_interface *iface;
2662 struct usb_host_interface *alts;
2663 struct usb_interface_descriptor *altsd;
2664 int i, altno, err, stream;
2665 int format;
8886f33f 2666 struct audioformat *fp = NULL;
1da177e4 2667 unsigned char *fmt, *csep;
b9d43bcd 2668 int num;
1da177e4
LT		 2669
2670 dev = chip->dev;
2671
2672 /* parse the interface's altsettings */
2673 iface = usb_ifnum_to_if(dev, iface_no);
b9d43bcd
PM		 2674
2675 num = iface->num_altsetting;
2676
2677 /*
2678 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
2679 * one misses syncpipe, and does not produce any sound.
2680 */
2681 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
2682 num = 4;
2683
2684 for (i = 0; i < num; i++) {
1da177e4
LT		 2685 alts = &iface->altsetting[i];
2686 altsd = get_iface_desc(alts);
2687 /* skip invalid one */
2688 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2689 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2690 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2691 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2692 altsd->bNumEndpoints < 1 ||
2693 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2694 continue;
2695 /* must be isochronous */
2696 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2697 USB_ENDPOINT_XFER_ISOC)
2698 continue;
2699 /* check direction */
2700 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2701 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2702 altno = altsd->bAlternateSetting;
e311334e
TLM		 2703
2704 /* audiophile usb: skip altsets incompatible with device_setup
2705 */
2706 if (chip->usb_id == USB_ID(0x0763, 0x2003) &&
2707 audiophile_skip_setting_quirk(chip, iface_no, altno))
2708 continue;
1da177e4
LT		 2709
2710 /* get audio formats */
2711 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2712 if (!fmt) {
2713 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2714 dev->devnum, iface_no, altno);
2715 continue;
2716 }
2717
2718 if (fmt[0] < 7) {
2719 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2720 dev->devnum, iface_no, altno);
2721 continue;
2722 }
2723
2724 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2725
2726 /* get format type */
2727 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2728 if (!fmt) {
2729 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2730 dev->devnum, iface_no, altno);
2731 continue;
2732 }
2733 if (fmt[0] < 8) {
2734 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2735 dev->devnum, iface_no, altno);
2736 continue;
2737 }
2738
8886f33f
CL		 2739 /*
2740 * Blue Microphones workaround: The last altsetting is identical
2741 * with the previous one, except for a larger packet size, but
2742 * is actually a mislabeled two-channel setting; ignore it.
2743 */
2744 if (fmt[4] == 1 && fmt[5] == 2 && altno == 2 && num == 3 &&
2745 fp && fp->altsetting == 1 && fp->channels == 1 &&
2746 fp->format == SNDRV_PCM_FORMAT_S16_LE &&
2747 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
2748 fp->maxpacksize * 2)
2749 continue;
2750
1da177e4
LT		 2751 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2752 /* Creamware Noah has this descriptor after the 2nd endpoint */
2753 if (!csep && altsd->bNumEndpoints >= 2)
2754 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2755 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
f8c75790 2756 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
faf8d117 2757 " class specific endpoint descriptor\n",
1da177e4 2758 dev->devnum, iface_no, altno);
faf8d117 2759 csep = NULL;
1da177e4
LT		 2760 }
2761
59feddb2 2762 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 2763 if (! fp) {
2764 snd_printk(KERN_ERR "cannot malloc\n");
2765 return -ENOMEM;
2766 }
2767
1da177e4
LT		 2768 fp->iface = iface_no;
2769 fp->altsetting = altno;
2770 fp->altset_idx = i;
2771 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2772 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
744b89e5 2773 fp->datainterval = parse_datainterval(chip, alts);
1da177e4 2774 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2775 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2776 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2777 * (fp->maxpacksize & 0x7ff);
faf8d117 2778 fp->attributes = csep ? csep[3] : 0;
1da177e4
LT		 2779
2780 /* some quirks for attributes here */
2781
c3f93297
CL		 2782 switch (chip->usb_id) {
2783 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2784 /* Optoplay sets the sample rate attribute although
2785 * it seems not supporting it in fact.
2786 */
2787 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2788 break;
2789 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2790 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2791 /* doesn't set the sample rate attribute, but supports it */
2792 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2793 break;
2794 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2795 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2796 an older model 77d:223) */
1da177e4
LT		 2797 /*
2798 * plantronics headset and Griffin iMic have set adaptive-in
2799 * although it's really not...
2800 */
1da177e4
LT		 2801 fp->ep_attr &= ~EP_ATTR_MASK;
2802 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2803 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2804 else
2805 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2806 break;
1da177e4
LT		 2807 }
2808
2809 /* ok, let's parse further... */
27d10f56 2810 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2811 kfree(fp->rate_table);
2812 kfree(fp);
2813 continue;
2814 }
2815
b9d710b3 2816 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
1da177e4
LT		 2817 err = add_audio_endpoint(chip, stream, fp);
2818 if (err < 0) {
2819 kfree(fp->rate_table);
2820 kfree(fp);
2821 return err;
2822 }
2823 /* try to set the interface... */
2824 usb_set_interface(chip->dev, iface_no, altno);
2825 init_usb_pitch(chip->dev, iface_no, alts, fp);
2826 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2827 }
2828 return 0;
2829}
2830
2831
2832/*
2833 * disconnect streams
2834 * called from snd_usb_audio_disconnect()
2835 */
ee733397 2836static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2837{
2838 int idx;
86e07d34
TI		 2839 struct snd_usb_stream *as;
2840 struct snd_usb_substream *subs;
1da177e4 2841
86e07d34 2842 as = list_entry(head, struct snd_usb_stream, list);
1da177e4
LT		 2843 for (idx = 0; idx < 2; idx++) {
2844 subs = &as->substream[idx];
2845 if (!subs->num_formats)
2846 return;
2847 release_substream_urbs(subs, 1);
2848 subs->interface = -1;
2849 }
2850}
2851
2852/*
2853 * parse audio control descriptor and create pcm/midi streams
2854 */
86e07d34 2855static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
1da177e4
LT		 2856{
2857 struct usb_device *dev = chip->dev;
2858 struct usb_host_interface *host_iface;
2859 struct usb_interface *iface;
2860 unsigned char *p1;
2861 int i, j;
2862
2863 /* find audiocontrol interface */
2864 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2865 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2866 snd_printk(KERN_ERR "cannot find HEADER\n");
2867 return -EINVAL;
2868 }
2869 if (! p1[7] || p1[0] < 8 + p1[7]) {
2870 snd_printk(KERN_ERR "invalid HEADER\n");
2871 return -EINVAL;
2872 }
2873
2874 /*
2875 * parse all USB audio streaming interfaces
2876 */
2877 for (i = 0; i < p1[7]; i++) {
2878 struct usb_host_interface *alts;
2879 struct usb_interface_descriptor *altsd;
2880 j = p1[8 + i];
2881 iface = usb_ifnum_to_if(dev, j);
2882 if (!iface) {
2883 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2884 dev->devnum, ctrlif, j);
2885 continue;
2886 }
2887 if (usb_interface_claimed(iface)) {
2888 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2889 continue;
2890 }
2891 alts = &iface->altsetting[0];
2892 altsd = get_iface_desc(alts);
2893 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2894 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2895 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
d82af9f9
CL		 2896 int err = snd_usbmidi_create(chip->card, iface,
2897 &chip->midi_list, NULL);
2898 if (err < 0) {
1da177e4
LT		 2899 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2900 continue;
2901 }
2902 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2903 continue;
2904 }
2905 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2906 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2907 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2908 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2909 /* skip non-supported classes */
2910 continue;
2911 }
076639f6
CL		 2912 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
2913 snd_printk(KERN_ERR "low speed audio streaming not supported\n");
2914 continue;
2915 }
1da177e4
LT		 2916 if (! parse_audio_endpoints(chip, j)) {
2917 usb_set_interface(dev, j, 0); /* reset the current interface */
2918 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2919 }
2920 }
2921
2922 return 0;
2923}
2924
2925/*
2926 * create a stream for an endpoint/altsetting without proper descriptors
2927 */
86e07d34 2928static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
1da177e4 2929 struct usb_interface *iface,
86e07d34 2930 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2931{
2932 struct audioformat *fp;
2933 struct usb_host_interface *alts;
2934 int stream, err;
b4482a4b 2935 unsigned *rate_table = NULL;
1da177e4 2936
52978be6 2937 fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
1da177e4 2938 if (! fp) {
52978be6 2939 snd_printk(KERN_ERR "cannot memdup\n");
1da177e4
LT		 2940 return -ENOMEM;
2941 }
1da177e4
LT		 2942 if (fp->nr_rates > 0) {
2943 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2944 if (!rate_table) {
2945 kfree(fp);
2946 return -ENOMEM;
2947 }
2948 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2949 fp->rate_table = rate_table;
2950 }
2951
2952 stream = (fp->endpoint & USB_DIR_IN)
2953 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2954 err = add_audio_endpoint(chip, stream, fp);
2955 if (err < 0) {
2956 kfree(fp);
2957 kfree(rate_table);
2958 return err;
2959 }
2960 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2961 fp->altset_idx >= iface->num_altsetting) {
2962 kfree(fp);
2963 kfree(rate_table);
2964 return -EINVAL;
2965 }
2966 alts = &iface->altsetting[fp->altset_idx];
744b89e5 2967 fp->datainterval = parse_datainterval(chip, alts);
894dcd78 2968 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
1da177e4
LT		 2969 usb_set_interface(chip->dev, fp->iface, 0);
2970 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2971 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2972 return 0;
2973}
2974
2975/*
2976 * create a stream for an interface with proper descriptors
2977 */
86e07d34 2978static int create_standard_audio_quirk(struct snd_usb_audio *chip,
d1bda045 2979 struct usb_interface *iface,
86e07d34 2980 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2981{
2982 struct usb_host_interface *alts;
2983 struct usb_interface_descriptor *altsd;
2984 int err;
2985
2986 alts = &iface->altsetting[0];
2987 altsd = get_iface_desc(alts);
d1bda045 2988 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
1da177e4
LT		 2989 if (err < 0) {
2990 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2991 altsd->bInterfaceNumber, err);
2992 return err;
2993 }
d1bda045
CL		 2994 /* reset the current interface */
2995 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
1da177e4
LT		 2996 return 0;
2997}
2998
2999/*
310e0dc0
PLC		 3000 * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
3001 * The only way to detect the sample rate is by looking at wMaxPacketSize.
1da177e4 3002 */
310e0dc0
PLC		 3003static int create_uaxx_quirk(struct snd_usb_audio *chip,
3004 struct usb_interface *iface,
3005 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3006{
3007 static const struct audioformat ua_format = {
3008 .format = SNDRV_PCM_FORMAT_S24_3LE,
3009 .channels = 2,
3010 .fmt_type = USB_FORMAT_TYPE_I,
3011 .altsetting = 1,
3012 .altset_idx = 1,
3013 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3014 };
3015 struct usb_host_interface *alts;
3016 struct usb_interface_descriptor *altsd;
3017 struct audioformat *fp;
3018 int stream, err;
3019
310e0dc0
PLC		 3020 /* both PCM and MIDI interfaces have 2 or more altsettings */
3021 if (iface->num_altsetting < 2)
1da177e4
LT		 3022 return -ENXIO;
3023 alts = &iface->altsetting[1];
3024 altsd = get_iface_desc(alts);
3025
59b3db6c
PLC		 3026 if (altsd->bNumEndpoints == 2) {
3027 static const struct snd_usb_midi_endpoint_info ua700_ep = {
3028 .out_cables = 0x0003,
3029 .in_cables = 0x0003
3030 };
3031 static const struct snd_usb_audio_quirk ua700_quirk = {
3032 .type = QUIRK_MIDI_FIXED_ENDPOINT,
3033 .data = &ua700_ep
3034 };
3035 static const struct snd_usb_midi_endpoint_info uaxx_ep = {
3036 .out_cables = 0x0001,
3037 .in_cables = 0x0001
3038 };
3039 static const struct snd_usb_audio_quirk uaxx_quirk = {
3040 .type = QUIRK_MIDI_FIXED_ENDPOINT,
3041 .data = &uaxx_ep
3042 };
d82af9f9
CL		 3043 const struct snd_usb_audio_quirk *quirk =
3044 chip->usb_id == USB_ID(0x0582, 0x002b)
3045 ? &ua700_quirk : &uaxx_quirk;
3046 return snd_usbmidi_create(chip->card, iface,
3047 &chip->midi_list, quirk);
59b3db6c
PLC		 3048 }
3049
1da177e4
LT		 3050 if (altsd->bNumEndpoints != 1)
3051 return -ENXIO;
3052
3053 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
3054 if (!fp)
3055 return -ENOMEM;
3056 memcpy(fp, &ua_format, sizeof(*fp));
3057
3058 fp->iface = altsd->bInterfaceNumber;
3059 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3060 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
744b89e5 3061 fp->datainterval = 0;
1da177e4
LT		 3062 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3063
3064 switch (fp->maxpacksize) {
3065 case 0x120:
3066 fp->rate_max = fp->rate_min = 44100;
3067 break;
3068 case 0x138:
3069 case 0x140:
3070 fp->rate_max = fp->rate_min = 48000;
3071 break;
3072 case 0x258:
3073 case 0x260:
3074 fp->rate_max = fp->rate_min = 96000;
3075 break;
3076 default:
3077 snd_printk(KERN_ERR "unknown sample rate\n");
3078 kfree(fp);
3079 return -ENXIO;
3080 }
3081
3082 stream = (fp->endpoint & USB_DIR_IN)
3083 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3084 err = add_audio_endpoint(chip, stream, fp);
3085 if (err < 0) {
3086 kfree(fp);
3087 return err;
3088 }
3089 usb_set_interface(chip->dev, fp->iface, 0);
3090 return 0;
3091}
3092
3093/*
3094 * Create a stream for an Edirol UA-1000 interface.
3095 */
86e07d34 3096static int create_ua1000_quirk(struct snd_usb_audio *chip,
854af957 3097 struct usb_interface *iface,
86e07d34 3098 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3099{
3100 static const struct audioformat ua1000_format = {
3101 .format = SNDRV_PCM_FORMAT_S32_LE,
3102 .fmt_type = USB_FORMAT_TYPE_I,
3103 .altsetting = 1,
3104 .altset_idx = 1,
3105 .attributes = 0,
3106 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3107 };
3108 struct usb_host_interface *alts;
3109 struct usb_interface_descriptor *altsd;
3110 struct audioformat *fp;
3111 int stream, err;
3112
3113 if (iface->num_altsetting != 2)
3114 return -ENXIO;
3115 alts = &iface->altsetting[1];
3116 altsd = get_iface_desc(alts);
c4a87ef4 3117 if (alts->extralen != 11 || alts->extra[1] != USB_DT_CS_INTERFACE ||
1da177e4
LT		 3118 altsd->bNumEndpoints != 1)
3119 return -ENXIO;
3120
52978be6 3121 fp = kmemdup(&ua1000_format, sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 3122 if (!fp)
3123 return -ENOMEM;
1da177e4
LT		 3124
3125 fp->channels = alts->extra[4];
3126 fp->iface = altsd->bInterfaceNumber;
3127 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3128 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
744b89e5 3129 fp->datainterval = parse_datainterval(chip, alts);
1da177e4
LT		 3130 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3131 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
3132
3133 stream = (fp->endpoint & USB_DIR_IN)
3134 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3135 err = add_audio_endpoint(chip, stream, fp);
3136 if (err < 0) {
3137 kfree(fp);
3138 return err;
3139 }
3140 /* FIXME: playback must be synchronized to capture */
3141 usb_set_interface(chip->dev, fp->iface, 0);
3142 return 0;
3143}
3144
d0b0fac1
BF		 3145/*
3146 * Create a stream for an Edirol UA-101 interface.
3147 * Copy, paste and modify from Edirol UA-1000
3148 */
3149static int create_ua101_quirk(struct snd_usb_audio *chip,
3150 struct usb_interface *iface,
3151 const struct snd_usb_audio_quirk *quirk)
3152{
3153 static const struct audioformat ua101_format = {
3154 .format = SNDRV_PCM_FORMAT_S32_LE,
3155 .fmt_type = USB_FORMAT_TYPE_I,
3156 .altsetting = 1,
3157 .altset_idx = 1,
3158 .attributes = 0,
3159 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3160 };
3161 struct usb_host_interface *alts;
3162 struct usb_interface_descriptor *altsd;
3163 struct audioformat *fp;
3164 int stream, err;
3165
3166 if (iface->num_altsetting != 2)
3167 return -ENXIO;
3168 alts = &iface->altsetting[1];
3169 altsd = get_iface_desc(alts);
3170 if (alts->extralen != 18 || alts->extra[1] != USB_DT_CS_INTERFACE ||
3171 altsd->bNumEndpoints != 1)
3172 return -ENXIO;
3173
3174 fp = kmemdup(&ua101_format, sizeof(*fp), GFP_KERNEL);
3175 if (!fp)
3176 return -ENOMEM;
3177
3178 fp->channels = alts->extra[11];
3179 fp->iface = altsd->bInterfaceNumber;
3180 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3181 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
744b89e5 3182 fp->datainterval = parse_datainterval(chip, alts);
d0b0fac1
BF		 3183 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3184 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[15]);
3185
3186 stream = (fp->endpoint & USB_DIR_IN)
3187 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3188 err = add_audio_endpoint(chip, stream, fp);
3189 if (err < 0) {
3190 kfree(fp);
3191 return err;
3192 }
3193 /* FIXME: playback must be synchronized to capture */
3194 usb_set_interface(chip->dev, fp->iface, 0);
3195 return 0;
3196}
3197
86e07d34 3198static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3199 struct usb_interface *iface,
86e07d34 3200 const struct snd_usb_audio_quirk *quirk);
1da177e4
LT		 3201
3202/*
3203 * handle the quirks for the contained interfaces
3204 */
86e07d34 3205static int create_composite_quirk(struct snd_usb_audio *chip,
1da177e4 3206 struct usb_interface *iface,
86e07d34 3207 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3208{
3209 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
3210 int err;
3211
3212 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
3213 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
3214 if (!iface)
3215 continue;
3216 if (quirk->ifnum != probed_ifnum &&
3217 usb_interface_claimed(iface))
3218 continue;
3219 err = snd_usb_create_quirk(chip, iface, quirk);
3220 if (err < 0)
3221 return err;
3222 if (quirk->ifnum != probed_ifnum)
3223 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
3224 }
3225 return 0;
3226}
3227
86e07d34 3228static int ignore_interface_quirk(struct snd_usb_audio *chip,
854af957 3229 struct usb_interface *iface,
86e07d34 3230 const struct snd_usb_audio_quirk *quirk)
854af957
CL		 3231{
3232 return 0;
3233}
3234
1da177e4
LT		 3235
3236/*
3237 * boot quirks
3238 */
3239
3240#define EXTIGY_FIRMWARE_SIZE_OLD 794
3241#define EXTIGY_FIRMWARE_SIZE_NEW 483
3242
3243static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
3244{
3245 struct usb_host_config *config = dev->actconfig;
3246 int err;
3247
3248 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
3249 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
3250 snd_printdd("sending Extigy boot sequence...\n");
3251 /* Send message to force it to reconnect with full interface. */
3252 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3253 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3254 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3255 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3256 &dev->descriptor, sizeof(dev->descriptor));
3257 config = dev->actconfig;
3258 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3259 err = usb_reset_configuration(dev);
3260 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3261 snd_printdd("extigy_boot: new boot length = %d\n",
3262 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3263 return -ENODEV; /* quit this anyway */
3264 }
3265 return 0;
3266}
3267
3a2f0856
CL		 3268static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3269{
3a2f0856
CL		 3270 u8 buf = 1;
3271
3272 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3273 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3274 0, 0, &buf, 1, 1000);
3275 if (buf == 0) {
3276 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3277 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3278 1, 2000, NULL, 0, 1000);
3279 return -ENODEV;
3280 }
3a2f0856
CL		 3281 return 0;
3282}
3283
e217e30c
SR		 3284/*
3285 * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
3286 * documented in the device's data sheet.
3287 */
3288static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
3289{
3290 u8 buf[4];
3291 buf[0] = 0x20;
3292 buf[1] = value & 0xff;
3293 buf[2] = (value >> 8) & 0xff;
3294 buf[3] = reg;
3295 return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
3296 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
3297 0, 0, &buf, 4, 1000);
3298}
3299
3300static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
3301{
3302 /*
3303 * Enable line-out driver mode, set headphone source to front
3304 * channels, enable stereo mic.
3305 */
3306 return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
3307}
3308
92a43793
DA		 3309/*
3310 * C-Media CM6206 is based on CM106 with two additional
3311 * registers that are not documented in the data sheet.
3312 * Values here are chosen based on sniffing USB traffic
3313 * under Windows.
3314 */
3315static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
3316{
3317 int err, reg;
3318 int val[] = {0x200c, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
3319
3320 for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
3321 err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
3322 if (err < 0)
3323 return err;
3324 }
3325
3326 return err;
3327}
e217e30c 3328
e311334e
TLM		 3329/*
3330 * Setup quirks
3331 */
3332#define AUDIOPHILE_SET 0x01 /* if set, parse device_setup */
3333#define AUDIOPHILE_SET_DTS 0x02 /* if set, enable DTS Digital Output */
3334#define AUDIOPHILE_SET_96K 0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
3335#define AUDIOPHILE_SET_24B 0x08 /* 24bits sample if set, 16bits otherwise */
3336#define AUDIOPHILE_SET_DI 0x10 /* if set, enable Digital Input */
3337#define AUDIOPHILE_SET_MASK 0x1F /* bit mask for setup value */
3338#define AUDIOPHILE_SET_24B_48K_DI 0x19 /* value for 24bits+48KHz+Digital Input */
3339#define AUDIOPHILE_SET_24B_48K_NOTDI 0x09 /* value for 24bits+48KHz+No Digital Input */
3340#define AUDIOPHILE_SET_16B_48K_DI 0x11 /* value for 16bits+48KHz+Digital Input */
3341#define AUDIOPHILE_SET_16B_48K_NOTDI 0x01 /* value for 16bits+48KHz+No Digital Input */
3342
3343static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
3344 int iface, int altno)
3345{
f8c78b82
TLM		 3346 /* Reset ALL ifaces to 0 altsetting.
3347 * Call it for every possible altsetting of every interface.
3348 */
3349 usb_set_interface(chip->dev, iface, 0);
3350
e311334e
TLM		 3351 if (device_setup[chip->index] & AUDIOPHILE_SET) {
3352 if ((device_setup[chip->index] & AUDIOPHILE_SET_DTS)
3353 && altno != 6)
3354 return 1; /* skip this altsetting */
3355 if ((device_setup[chip->index] & AUDIOPHILE_SET_96K)
3356 && altno != 1)
3357 return 1; /* skip this altsetting */
3358 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3359 AUDIOPHILE_SET_24B_48K_DI && altno != 2)
3360 return 1; /* skip this altsetting */
3361 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3362 AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
3363 return 1; /* skip this altsetting */
3364 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3365 AUDIOPHILE_SET_16B_48K_DI && altno != 4)
3366 return 1; /* skip this altsetting */
3367 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3368 AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
3369 return 1; /* skip this altsetting */
3370 }
3371 return 0; /* keep this altsetting */
3372}
1da177e4 3373
d82af9f9
CL		 3374static int create_any_midi_quirk(struct snd_usb_audio *chip,
3375 struct usb_interface *intf,
3376 const struct snd_usb_audio_quirk *quirk)
3377{
3378 return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
3379}
3380
1da177e4
LT		 3381/*
3382 * audio-interface quirks
3383 *
3384 * returns zero if no standard audio/MIDI parsing is needed.
3385 * returns a postive value if standard audio/midi interfaces are parsed
3386 * after this.
3387 * returns a negative value at error.
3388 */
86e07d34 3389static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3390 struct usb_interface *iface,
86e07d34 3391 const struct snd_usb_audio_quirk *quirk)
1da177e4 3392{
86e07d34
TI		 3393 typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
3394 const struct snd_usb_audio_quirk *);
854af957
CL		 3395 static const quirk_func_t quirk_funcs[] = {
3396 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3397 [QUIRK_COMPOSITE] = create_composite_quirk,
d82af9f9
CL		 3398 [QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
3399 [QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
3400 [QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
3401 [QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
3402 [QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
3403 [QUIRK_MIDI_FASTLANE] = create_any_midi_quirk,
3404 [QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
3405 [QUIRK_MIDI_CME] = create_any_midi_quirk,
d1bda045 3406 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
854af957 3407 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
854af957 3408 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
d0b0fac1 3409 [QUIRK_AUDIO_EDIROL_UA101] = create_ua101_quirk,
310e0dc0 3410 [QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk
854af957
CL		 3411 };
3412
3413 if (quirk->type < QUIRK_TYPE_COUNT) {
3414 return quirk_funcs[quirk->type](chip, iface, quirk);
3415 } else {
1da177e4
LT		 3416 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3417 return -ENXIO;
3418 }
3419}
3420
3421
3422/*
3423 * common proc files to show the usb device info
3424 */
86e07d34 3425static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3426{
86e07d34 3427 struct snd_usb_audio *chip = entry->private_data;
07f51a72 3428 if (!chip->shutdown)
1da177e4
LT		 3429 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3430}
3431
86e07d34 3432static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3433{
86e07d34 3434 struct snd_usb_audio *chip = entry->private_data;
07f51a72 3435 if (!chip->shutdown)
1da177e4 3436 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3437 USB_ID_VENDOR(chip->usb_id),
3438 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3439}
3440
86e07d34 3441static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
1da177e4 3442{
86e07d34 3443 struct snd_info_entry *entry;
07f51a72 3444 if (!snd_card_proc_new(chip->card, "usbbus", &entry))
bf850204 3445 snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
07f51a72 3446 if (!snd_card_proc_new(chip->card, "usbid", &entry))
bf850204 3447 snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
1da177e4
LT		 3448}
3449
3450/*
3451 * free the chip instance
3452 *
3453 * here we have to do not much, since pcm and controls are already freed
3454 *
3455 */
3456
86e07d34 3457static int snd_usb_audio_free(struct snd_usb_audio *chip)
1da177e4
LT		 3458{
3459 kfree(chip);
3460 return 0;
3461}
3462
86e07d34 3463static int snd_usb_audio_dev_free(struct snd_device *device)
1da177e4 3464{
86e07d34 3465 struct snd_usb_audio *chip = device->device_data;
1da177e4
LT		 3466 return snd_usb_audio_free(chip);
3467}
3468
3469
3470/*
3471 * create a chip instance and set its names.
3472 */
3473static int snd_usb_audio_create(struct usb_device *dev, int idx,
86e07d34
TI		 3474 const struct snd_usb_audio_quirk *quirk,
3475 struct snd_usb_audio **rchip)
1da177e4 3476{
86e07d34
TI		 3477 struct snd_card *card;
3478 struct snd_usb_audio *chip;
1da177e4
LT		 3479 int err, len;
3480 char component[14];
86e07d34 3481 static struct snd_device_ops ops = {
1da177e4
LT		 3482 .dev_free = snd_usb_audio_dev_free,
3483 };
3484
3485 *rchip = NULL;
3486
076639f6
CL		 3487 if (snd_usb_get_speed(dev) != USB_SPEED_LOW &&
3488 snd_usb_get_speed(dev) != USB_SPEED_FULL &&
1da177e4
LT		 3489 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3490 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3491 return -ENXIO;
3492 }
3493
bd7dd77c
TI		 3494 err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
3495 if (err < 0) {
1da177e4 3496 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
bd7dd77c 3497 return err;
1da177e4
LT		 3498 }
3499
561b220a 3500 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4
LT		 3501 if (! chip) {
3502 snd_card_free(card);
3503 return -ENOMEM;
3504 }
3505
3506 chip->index = idx;
3507 chip->dev = dev;
3508 chip->card = card;
27d10f56
CL		 3509 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3510 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3511 INIT_LIST_HEAD(&chip->pcm_list);
3512 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3513 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3514
3515 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3516 snd_usb_audio_free(chip);
3517 snd_card_free(card);
3518 return err;
3519 }
3520
3521 strcpy(card->driver, "USB-Audio");
3522 sprintf(component, "USB%04x:%04x",
27d10f56 3523 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3524 snd_component_add(card, component);
3525
3526 /* retrieve the device string as shortname */
3527 if (quirk && quirk->product_name) {
3528 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3529 } else {
3530 if (!dev->descriptor.iProduct ||
3531 usb_string(dev, dev->descriptor.iProduct,
3532 card->shortname, sizeof(card->shortname)) <= 0) {
3533 /* no name available from anywhere, so use ID */
3534 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3535 USB_ID_VENDOR(chip->usb_id),
3536 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3537 }
3538 }
3539
3540 /* retrieve the vendor and device strings as longname */
3541 if (quirk && quirk->vendor_name) {
3542 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3543 } else {
3544 if (dev->descriptor.iManufacturer)
3545 len = usb_string(dev, dev->descriptor.iManufacturer,
3546 card->longname, sizeof(card->longname));
3547 else
3548 len = 0;
3549 /* we don't really care if there isn't any vendor string */
3550 }
3551 if (len > 0)
3552 strlcat(card->longname, " ", sizeof(card->longname));
3553
3554 strlcat(card->longname, card->shortname, sizeof(card->longname));
3555
3556 len = strlcat(card->longname, " at ", sizeof(card->longname));
3557
3558 if (len < sizeof(card->longname))
3559 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3560
3561 strlcat(card->longname,
076639f6
CL		 3562 snd_usb_get_speed(dev) == USB_SPEED_LOW ? ", low speed" :
3563 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" :
3564 ", high speed",
1da177e4
LT		 3565 sizeof(card->longname));
3566
3567 snd_usb_audio_create_proc(chip);
3568
1da177e4
LT		 3569 *rchip = chip;
3570 return 0;
3571}
3572
3573
3574/*
3575 * probe the active usb device
3576 *
3577 * note that this can be called multiple times per a device, when it
3578 * includes multiple audio control interfaces.
3579 *
3580 * thus we check the usb device pointer and creates the card instance
3581 * only at the first time. the successive calls of this function will
3582 * append the pcm interface to the corresponding card.
3583 */
3584static void *snd_usb_audio_probe(struct usb_device *dev,
3585 struct usb_interface *intf,
3586 const struct usb_device_id *usb_id)
3587{
86e07d34 3588 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
1da177e4 3589 int i, err;
86e07d34 3590 struct snd_usb_audio *chip;
1da177e4
LT		 3591 struct usb_host_interface *alts;
3592 int ifnum;
27d10f56 3593 u32 id;
1da177e4
LT		 3594
3595 alts = &intf->altsetting[0];
3596 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3597 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3598 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3599
3600 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3601 goto __err_val;
3602
3603 /* SB Extigy needs special boot-up sequence */
3604 /* if more models come, this will go to the quirk list. */
27d10f56 3605 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3606 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3607 goto __err_val;
1da177e4 3608 }
3a2f0856
CL		 3609 /* SB Audigy 2 NX needs its own boot-up magic, too */
3610 if (id == USB_ID(0x041e, 0x3020)) {
3611 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3612 goto __err_val;
3613 }
1da177e4 3614
e217e30c
SR		 3615 /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
3616 if (id == USB_ID(0x10f5, 0x0200)) {
3617 if (snd_usb_cm106_boot_quirk(dev) < 0)
3618 goto __err_val;
3619 }
3620
92a43793
DA		 3621 /* C-Media CM6206 / CM106-Like Sound Device */
3622 if (id == USB_ID(0x0d8c, 0x0102)) {
3623 if (snd_usb_cm6206_boot_quirk(dev) < 0)
3624 goto __err_val;
3625 }
3626
1da177e4
LT		 3627 /*
3628 * found a config. now register to ALSA
3629 */
3630
3631 /* check whether it's already registered */
3632 chip = NULL;
12aa7579 3633 mutex_lock(&register_mutex);
1da177e4
LT		 3634 for (i = 0; i < SNDRV_CARDS; i++) {
3635 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3636 if (usb_chip[i]->shutdown) {
3637 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3638 goto __error;
3639 }
3640 chip = usb_chip[i];
3641 break;
3642 }
3643 }
3644 if (! chip) {
3645 /* it's a fresh one.
3646 * now look for an empty slot and create a new card instance
3647 */
1da177e4
LT		 3648 for (i = 0; i < SNDRV_CARDS; i++)
3649 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3650 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3651 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3652 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3653 goto __error;
3654 }
1dcd3ec4 3655 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3656 break;
3657 }
07f51a72
PM		 3658 if (!chip) {
3659 printk(KERN_ERR "no available usb audio device\n");
1da177e4
LT		 3660 goto __error;
3661 }
3662 }
3663
3664 err = 1; /* continue */
3665 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3666 /* need some special handlings */
3667 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3668 goto __error;
3669 }
3670
3671 if (err > 0) {
3672 /* create normal USB audio interfaces */
3673 if (snd_usb_create_streams(chip, ifnum) < 0 ||
7a9b8063 3674 snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
1da177e4
LT		 3675 goto __error;
3676 }
3677 }
3678
3679 /* we are allowed to call snd_card_register() many times */
3680 if (snd_card_register(chip->card) < 0) {
3681 goto __error;
3682 }
3683
3684 usb_chip[chip->index] = chip;
3685 chip->num_interfaces++;
12aa7579 3686 mutex_unlock(&register_mutex);
1da177e4
LT		 3687 return chip;
3688
3689 __error:
3690 if (chip && !chip->num_interfaces)
3691 snd_card_free(chip->card);
12aa7579 3692 mutex_unlock(&register_mutex);
1da177e4
LT		 3693 __err_val:
3694 return NULL;
3695}
3696
3697/*
3698 * we need to take care of counter, since disconnection can be called also
3699 * many times as well as usb_audio_probe().
3700 */
3701static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3702{
86e07d34
TI		 3703 struct snd_usb_audio *chip;
3704 struct snd_card *card;
1da177e4
LT		 3705 struct list_head *p;
3706
3707 if (ptr == (void *)-1L)
3708 return;
3709
3710 chip = ptr;
3711 card = chip->card;
12aa7579 3712 mutex_lock(&register_mutex);
1da177e4
LT		 3713 chip->shutdown = 1;
3714 chip->num_interfaces--;
3715 if (chip->num_interfaces <= 0) {
3716 snd_card_disconnect(card);
3717 /* release the pcm resources */
3718 list_for_each(p, &chip->pcm_list) {
ee733397 3719 snd_usb_stream_disconnect(p);
1da177e4
LT		 3720 }
3721 /* release the midi resources */
3722 list_for_each(p, &chip->midi_list) {
ee733397 3723 snd_usbmidi_disconnect(p);
1da177e4 3724 }
84957a8a
CL		 3725 /* release mixer resources */
3726 list_for_each(p, &chip->mixer_list) {
3727 snd_usb_mixer_disconnect(p);
3728 }
9eb70e68 3729 usb_chip[chip->index] = NULL;
12aa7579 3730 mutex_unlock(&register_mutex);
c461482c 3731 snd_card_free_when_closed(card);
1da177e4 3732 } else {
12aa7579 3733 mutex_unlock(&register_mutex);
1da177e4
LT		 3734 }
3735}
3736
3737/*
3738 * new 2.5 USB kernel API
3739 */
3740static int usb_audio_probe(struct usb_interface *intf,
3741 const struct usb_device_id *id)
3742{
3743 void *chip;
3744 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3745 if (chip) {
f4e9749f 3746 usb_set_intfdata(intf, chip);
1da177e4
LT		 3747 return 0;
3748 } else
3749 return -EIO;
3750}
3751
3752static void usb_audio_disconnect(struct usb_interface *intf)
3753{
3754 snd_usb_audio_disconnect(interface_to_usbdev(intf),
f4e9749f 3755 usb_get_intfdata(intf));
1da177e4
LT		 3756}
3757
93521d27 3758#ifdef CONFIG_PM
f85bf29c
ON		 3759static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
3760{
f4e9749f 3761 struct snd_usb_audio *chip = usb_get_intfdata(intf);
f85bf29c
ON		 3762 struct list_head *p;
3763 struct snd_usb_stream *as;
3764
3765 if (chip == (void *)-1L)
3766 return 0;
3767
3768 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
3769 if (!chip->num_suspended_intf++) {
3770 list_for_each(p, &chip->pcm_list) {
3771 as = list_entry(p, struct snd_usb_stream, list);
3772 snd_pcm_suspend_all(as->pcm);
3773 }
3774 }
3775
3776 return 0;
3777}
3778
3779static int usb_audio_resume(struct usb_interface *intf)
3780{
f4e9749f 3781 struct snd_usb_audio *chip = usb_get_intfdata(intf);
f85bf29c
ON		 3782
3783 if (chip == (void *)-1L)
3784 return 0;
3785 if (--chip->num_suspended_intf)
3786 return 0;
3787 /*
3788 * ALSA leaves material resumption to user space
3789 * we just notify
3790 */
3791
3792 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
3793
3794 return 0;
3795}
93521d27 3796#endif /* CONFIG_PM */
1da177e4
LT		 3797
3798static int __init snd_usb_audio_init(void)
3799{
f3990e61 3800 if (nrpacks < 1 || nrpacks > MAX_PACKS) {
1da177e4
LT		 3801 printk(KERN_WARNING "invalid nrpacks value.\n");
3802 return -EINVAL;
3803 }
cf78bbc4 3804 return usb_register(&usb_audio_driver);
1da177e4
LT		 3805}
3806
3807
3808static void __exit snd_usb_audio_cleanup(void)
3809{
3810 usb_deregister(&usb_audio_driver);
3811}
3812
3813module_init(snd_usb_audio_init);
3814module_exit(snd_usb_audio_cleanup);
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