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ALSA: usbaudio: parse USB descriptors with structs
[deliverable/linux.git] / sound / usb / usbaudio.c
CommitLineData
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>
47#include <linux/moduleparam.h>
12aa7579 48#include <linux/mutex.h>
28e1b773
DM		 49#include <linux/usb/audio.h>
50
1da177e4
LT		 51#include <sound/core.h>
52#include <sound/info.h>
53#include <sound/pcm.h>
54#include <sound/pcm_params.h>
55#include <sound/initval.h>
56
57#include "usbaudio.h"
58
59
60MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
61MODULE_DESCRIPTION("USB Audio");
62MODULE_LICENSE("GPL");
63MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
64
65
66static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
67static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
07f51a72
PM		 68static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
69/* Vendor/product IDs for this card */
70static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
71static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
92b9ac78 72static int nrpacks = 8; /* max. number of packets per urb */
1da177e4 73static int async_unlink = 1;
e311334e 74static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
7a9b8063 75static int ignore_ctl_error;
1da177e4
LT		 76
77module_param_array(index, int, NULL, 0444);
78MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
79module_param_array(id, charp, NULL, 0444);
80MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
81module_param_array(enable, bool, NULL, 0444);
82MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
83module_param_array(vid, int, NULL, 0444);
84MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
85module_param_array(pid, int, NULL, 0444);
86MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
71d848ca 87module_param(nrpacks, int, 0644);
1da177e4
LT		 88MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
89module_param(async_unlink, bool, 0444);
90MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
e311334e
TLM		 91module_param_array(device_setup, int, NULL, 0444);
92MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
7a9b8063
TI		 93module_param(ignore_ctl_error, bool, 0444);
94MODULE_PARM_DESC(ignore_ctl_error,
95 "Ignore errors from USB controller for mixer interfaces.");
1da177e4
LT		 96
97/*
98 * debug the h/w constraints
99 */
100/* #define HW_CONST_DEBUG */
101
102
103/*
104 *
105 */
106
92b9ac78 107#define MAX_PACKS 20
1da177e4 108#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
15a24c07 109#define MAX_URBS 8
604cf499 110#define SYNC_URBS 4 /* always four urbs for sync */
4d788e04 111#define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */
1da177e4 112
1da177e4
LT		 113struct audioformat {
114 struct list_head list;
115 snd_pcm_format_t format; /* format type */
116 unsigned int channels; /* # channels */
117 unsigned int fmt_type; /* USB audio format type (1-3) */
118 unsigned int frame_size; /* samples per frame for non-audio */
119 int iface; /* interface number */
120 unsigned char altsetting; /* corresponding alternate setting */
121 unsigned char altset_idx; /* array index of altenate setting */
122 unsigned char attributes; /* corresponding attributes of cs endpoint */
123 unsigned char endpoint; /* endpoint */
124 unsigned char ep_attr; /* endpoint attributes */
744b89e5 125 unsigned char datainterval; /* log_2 of data packet interval */
1da177e4
LT		 126 unsigned int maxpacksize; /* max. packet size */
127 unsigned int rates; /* rate bitmasks */
128 unsigned int rate_min, rate_max; /* min/max rates */
129 unsigned int nr_rates; /* number of rate table entries */
130 unsigned int *rate_table; /* rate table */
131};
132
86e07d34
TI		 133struct snd_usb_substream;
134
1da177e4
LT		 135struct snd_urb_ctx {
136 struct urb *urb;
55851f73 137 unsigned int buffer_size; /* size of data buffer, if data URB */
86e07d34 138 struct snd_usb_substream *subs;
1da177e4
LT		 139 int index; /* index for urb array */
140 int packets; /* number of packets per urb */
1da177e4
LT		 141};
142
143struct snd_urb_ops {
86e07d34
TI		 144 int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
145 int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
146 int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
147 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
1da177e4
LT		 148};
149
150struct snd_usb_substream {
86e07d34 151 struct snd_usb_stream *stream;
1da177e4 152 struct usb_device *dev;
86e07d34 153 struct snd_pcm_substream *pcm_substream;
1da177e4
LT		 154 int direction; /* playback or capture */
155 int interface; /* current interface */
156 int endpoint; /* assigned endpoint */
157 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
158 unsigned int cur_rate; /* current rate (for hw_params callback) */
159 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
160 unsigned int format; /* USB data format */
161 unsigned int datapipe; /* the data i/o pipe */
162 unsigned int syncpipe; /* 1 - async out or adaptive in */
573567e0 163 unsigned int datainterval; /* log_2 of data packet interval */
1da177e4
LT		 164 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
165 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
166 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
167 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
168 unsigned int phase; /* phase accumulator */
169 unsigned int maxpacksize; /* max packet size in bytes */
170 unsigned int maxframesize; /* max packet size in frames */
171 unsigned int curpacksize; /* current packet size in bytes (for capture) */
172 unsigned int curframesize; /* current packet size in frames (for capture) */
173 unsigned int fill_max: 1; /* fill max packet size always */
98e89f60 174 unsigned int txfr_quirk:1; /* allow sub-frame alignment */
1da177e4
LT		 175 unsigned int fmt_type; /* USB audio format type (1-3) */
176
177 unsigned int running: 1; /* running status */
178
adc8d313 179 unsigned int hwptr_done; /* processed byte position in the buffer */
1da177e4
LT		 180 unsigned int transfer_done; /* processed frames since last period update */
181 unsigned long active_mask; /* bitmask of active urbs */
182 unsigned long unlink_mask; /* bitmask of unlinked urbs */
183
184 unsigned int nurbs; /* # urbs */
86e07d34
TI		 185 struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
186 struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
55851f73
CL		 187 char *syncbuf; /* sync buffer for all sync URBs */
188 dma_addr_t sync_dma; /* DMA address of syncbuf */
1da177e4
LT		 189
190 u64 formats; /* format bitmasks (all or'ed) */
191 unsigned int num_formats; /* number of supported audio formats (list) */
192 struct list_head fmt_list; /* format list */
8fec560d 193 struct snd_pcm_hw_constraint_list rate_list; /* limited rates */
1da177e4
LT		 194 spinlock_t lock;
195
196 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
197};
198
199
200struct snd_usb_stream {
86e07d34
TI		 201 struct snd_usb_audio *chip;
202 struct snd_pcm *pcm;
1da177e4
LT		 203 int pcm_index;
204 unsigned int fmt_type; /* USB audio format type (1-3) */
86e07d34 205 struct snd_usb_substream substream[2];
1da177e4
LT		 206 struct list_head list;
207};
208
209
210/*
211 * we keep the snd_usb_audio_t instances by ourselves for merging
212 * the all interfaces on the same card as one sound device.
213 */
214
12aa7579 215static DEFINE_MUTEX(register_mutex);
86e07d34 216static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
1da177e4
LT		 217
218
219/*
220 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
221 * this will overflow at approx 524 kHz
222 */
77933d72 223static inline unsigned get_usb_full_speed_rate(unsigned int rate)
1da177e4
LT		 224{
225 return ((rate << 13) + 62) / 125;
226}
227
228/*
229 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
230 * this will overflow at approx 4 MHz
231 */
77933d72 232static inline unsigned get_usb_high_speed_rate(unsigned int rate)
1da177e4
LT		 233{
234 return ((rate << 10) + 62) / 125;
235}
236
237/* convert our full speed USB rate into sampling rate in Hz */
77933d72 238static inline unsigned get_full_speed_hz(unsigned int usb_rate)
1da177e4
LT		 239{
240 return (usb_rate * 125 + (1 << 12)) >> 13;
241}
242
243/* convert our high speed USB rate into sampling rate in Hz */
77933d72 244static inline unsigned get_high_speed_hz(unsigned int usb_rate)
1da177e4
LT		 245{
246 return (usb_rate * 125 + (1 << 9)) >> 10;
247}
248
249
250/*
251 * prepare urb for full speed capture sync pipe
252 *
253 * fill the length and offset of each urb descriptor.
254 * the fixed 10.14 frequency is passed through the pipe.
255 */
86e07d34
TI		 256static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
257 struct snd_pcm_runtime *runtime,
1da177e4
LT		 258 struct urb *urb)
259{
260 unsigned char *cp = urb->transfer_buffer;
88518275 261 struct snd_urb_ctx *ctx = urb->context;
1da177e4 262
1da177e4 263 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 264 urb->iso_frame_desc[0].length = 3;
265 urb->iso_frame_desc[0].offset = 0;
266 cp[0] = subs->freqn >> 2;
267 cp[1] = subs->freqn >> 10;
268 cp[2] = subs->freqn >> 18;
1da177e4
LT		 269 return 0;
270}
271
272/*
273 * prepare urb for high speed capture sync pipe
274 *
275 * fill the length and offset of each urb descriptor.
276 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
277 */
86e07d34
TI		 278static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
279 struct snd_pcm_runtime *runtime,
1da177e4
LT		 280 struct urb *urb)
281{
282 unsigned char *cp = urb->transfer_buffer;
88518275 283 struct snd_urb_ctx *ctx = urb->context;
1da177e4 284
1da177e4 285 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 286 urb->iso_frame_desc[0].length = 4;
287 urb->iso_frame_desc[0].offset = 0;
288 cp[0] = subs->freqn;
289 cp[1] = subs->freqn >> 8;
290 cp[2] = subs->freqn >> 16;
291 cp[3] = subs->freqn >> 24;
1da177e4
LT		 292 return 0;
293}
294
295/*
296 * process after capture sync complete
297 * - nothing to do
298 */
86e07d34
TI		 299static int retire_capture_sync_urb(struct snd_usb_substream *subs,
300 struct snd_pcm_runtime *runtime,
1da177e4
LT		 301 struct urb *urb)
302{
303 return 0;
304}
305
306/*
307 * prepare urb for capture data pipe
308 *
309 * fill the offset and length of each descriptor.
310 *
311 * we use a temporary buffer to write the captured data.
312 * since the length of written data is determined by host, we cannot
313 * write onto the pcm buffer directly... the data is thus copied
314 * later at complete callback to the global buffer.
315 */
86e07d34
TI		 316static int prepare_capture_urb(struct snd_usb_substream *subs,
317 struct snd_pcm_runtime *runtime,
1da177e4
LT		 318 struct urb *urb)
319{
320 int i, offs;
88518275 321 struct snd_urb_ctx *ctx = urb->context;
1da177e4
LT		 322
323 offs = 0;
324 urb->dev = ctx->subs->dev; /* we need to set this at each time */
1da177e4
LT		 325 for (i = 0; i < ctx->packets; i++) {
326 urb->iso_frame_desc[i].offset = offs;
327 urb->iso_frame_desc[i].length = subs->curpacksize;
328 offs += subs->curpacksize;
1da177e4 329 }
1da177e4 330 urb->transfer_buffer_length = offs;
b263a9bd 331 urb->number_of_packets = ctx->packets;
1da177e4
LT		 332 return 0;
333}
334
335/*
336 * process after capture complete
337 *
338 * copy the data from each desctiptor to the pcm buffer, and
339 * update the current position.
340 */
86e07d34
TI		 341static int retire_capture_urb(struct snd_usb_substream *subs,
342 struct snd_pcm_runtime *runtime,
1da177e4
LT		 343 struct urb *urb)
344{
345 unsigned long flags;
346 unsigned char *cp;
347 int i;
adc8d313 348 unsigned int stride, frames, bytes, oldptr;
b263a9bd 349 int period_elapsed = 0;
1da177e4
LT		 350
351 stride = runtime->frame_bits >> 3;
352
353 for (i = 0; i < urb->number_of_packets; i++) {
354 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
355 if (urb->iso_frame_desc[i].status) {
356 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
357 // continue;
358 }
98e89f60
JG		 359 bytes = urb->iso_frame_desc[i].actual_length;
360 frames = bytes / stride;
361 if (!subs->txfr_quirk)
362 bytes = frames * stride;
363 if (bytes % (runtime->sample_bits >> 3) != 0) {
364#ifdef CONFIG_SND_DEBUG_VERBOSE
365 int oldbytes = bytes;
366#endif
367 bytes = frames * stride;
368 snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n",
369 oldbytes, bytes);
370 }
1da177e4
LT		 371 /* update the current pointer */
372 spin_lock_irqsave(&subs->lock, flags);
373 oldptr = subs->hwptr_done;
adc8d313
CL		 374 subs->hwptr_done += bytes;
375 if (subs->hwptr_done >= runtime->buffer_size * stride)
376 subs->hwptr_done -= runtime->buffer_size * stride;
98e89f60 377 frames = (bytes + (oldptr % stride)) / stride;
adc8d313 378 subs->transfer_done += frames;
b263a9bd
CL		 379 if (subs->transfer_done >= runtime->period_size) {
380 subs->transfer_done -= runtime->period_size;
381 period_elapsed = 1;
382 }
1da177e4
LT		 383 spin_unlock_irqrestore(&subs->lock, flags);
384 /* copy a data chunk */
adc8d313
CL		 385 if (oldptr + bytes > runtime->buffer_size * stride) {
386 unsigned int bytes1 =
387 runtime->buffer_size * stride - oldptr;
388 memcpy(runtime->dma_area + oldptr, cp, bytes1);
389 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
1da177e4 390 } else {
adc8d313 391 memcpy(runtime->dma_area + oldptr, cp, bytes);
1da177e4 392 }
1da177e4 393 }
b263a9bd
CL		 394 if (period_elapsed)
395 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 396 return 0;
397}
398
e4f8e656
CL		 399/*
400 * Process after capture complete when paused. Nothing to do.
401 */
402static int retire_paused_capture_urb(struct snd_usb_substream *subs,
403 struct snd_pcm_runtime *runtime,
404 struct urb *urb)
405{
406 return 0;
407}
408
1da177e4
LT		 409
410/*
411 * prepare urb for full speed playback sync pipe
412 *
413 * set up the offset and length to receive the current frequency.
414 */
415
86e07d34
TI		 416static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
417 struct snd_pcm_runtime *runtime,
1da177e4
LT		 418 struct urb *urb)
419{
88518275 420 struct snd_urb_ctx *ctx = urb->context;
1da177e4 421
1da177e4 422 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 423 urb->iso_frame_desc[0].length = 3;
424 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 425 return 0;
426}
427
428/*
429 * prepare urb for high speed playback sync pipe
430 *
431 * set up the offset and length to receive the current frequency.
432 */
433
86e07d34
TI		 434static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
435 struct snd_pcm_runtime *runtime,
1da177e4
LT		 436 struct urb *urb)
437{
88518275 438 struct snd_urb_ctx *ctx = urb->context;
1da177e4 439
1da177e4 440 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 441 urb->iso_frame_desc[0].length = 4;
442 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 443 return 0;
444}
445
446/*
447 * process after full speed playback sync complete
448 *
449 * retrieve the current 10.14 frequency from pipe, and set it.
450 * the value is referred in prepare_playback_urb().
451 */
86e07d34
TI		 452static int retire_playback_sync_urb(struct snd_usb_substream *subs,
453 struct snd_pcm_runtime *runtime,
1da177e4
LT		 454 struct urb *urb)
455{
ca81090a 456 unsigned int f;
1da177e4
LT		 457 unsigned long flags;
458
ca81090a
CL		 459 if (urb->iso_frame_desc[0].status == 0 &&
460 urb->iso_frame_desc[0].actual_length == 3) {
461 f = combine_triple((u8*)urb->transfer_buffer) << 2;
50cdbf15
CL		 462 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
463 spin_lock_irqsave(&subs->lock, flags);
464 subs->freqm = f;
465 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4 466 }
1da177e4
LT		 467 }
468
469 return 0;
470}
471
472/*
473 * process after high speed playback sync complete
474 *
475 * retrieve the current 12.13 frequency from pipe, and set it.
476 * the value is referred in prepare_playback_urb().
477 */
86e07d34
TI		 478static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
479 struct snd_pcm_runtime *runtime,
1da177e4
LT		 480 struct urb *urb)
481{
ca81090a 482 unsigned int f;
1da177e4
LT		 483 unsigned long flags;
484
ca81090a
CL		 485 if (urb->iso_frame_desc[0].status == 0 &&
486 urb->iso_frame_desc[0].actual_length == 4) {
487 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
50cdbf15
CL		 488 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
489 spin_lock_irqsave(&subs->lock, flags);
490 subs->freqm = f;
491 spin_unlock_irqrestore(&subs->lock, flags);
492 }
1da177e4
LT		 493 }
494
495 return 0;
496}
497
d513202e 498/*
97c889a7 499 * process after E-Mu 0202/0404/Tracker Pre high speed playback sync complete
d513202e
CL		 500 *
501 * These devices return the number of samples per packet instead of the number
502 * of samples per microframe.
503 */
504static int retire_playback_sync_urb_hs_emu(struct snd_usb_substream *subs,
505 struct snd_pcm_runtime *runtime,
506 struct urb *urb)
507{
508 unsigned int f;
509 unsigned long flags;
510
511 if (urb->iso_frame_desc[0].status == 0 &&
512 urb->iso_frame_desc[0].actual_length == 4) {
513 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
514 f >>= subs->datainterval;
515 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
516 spin_lock_irqsave(&subs->lock, flags);
517 subs->freqm = f;
518 spin_unlock_irqrestore(&subs->lock, flags);
519 }
520 }
521
522 return 0;
523}
524
9568f461
CL		 525/* determine the number of frames in the next packet */
526static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
527{
528 if (subs->fill_max)
529 return subs->maxframesize;
530 else {
531 subs->phase = (subs->phase & 0xffff)
532 + (subs->freqm << subs->datainterval);
533 return min(subs->phase >> 16, subs->maxframesize);
534 }
535}
536
b55bbf06 537/*
e4f8e656 538 * Prepare urb for streaming before playback starts or when paused.
b55bbf06 539 *
b7eb4a06 540 * We don't have any data, so we send silence.
b55bbf06 541 */
e4f8e656
CL		 542static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
543 struct snd_pcm_runtime *runtime,
544 struct urb *urb)
b55bbf06 545{
4b284928 546 unsigned int i, offs, counts;
86e07d34 547 struct snd_urb_ctx *ctx = urb->context;
4b284928 548 int stride = runtime->frame_bits >> 3;
b55bbf06 549
4b284928 550 offs = 0;
b55bbf06 551 urb->dev = ctx->subs->dev;
b7eb4a06 552 for (i = 0; i < ctx->packets; ++i) {
9568f461 553 counts = snd_usb_audio_next_packet_size(subs);
4b284928
CL		 554 urb->iso_frame_desc[i].offset = offs * stride;
555 urb->iso_frame_desc[i].length = counts * stride;
556 offs += counts;
b55bbf06 557 }
b7eb4a06 558 urb->number_of_packets = ctx->packets;
4b284928
CL		 559 urb->transfer_buffer_length = offs * stride;
560 memset(urb->transfer_buffer,
561 subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
562 offs * stride);
b55bbf06
CL		 563 return 0;
564}
565
1da177e4
LT		 566/*
567 * prepare urb for playback data pipe
568 *
7efd8bc8
CL		 569 * Since a URB can handle only a single linear buffer, we must use double
570 * buffering when the data to be transferred overflows the buffer boundary.
571 * To avoid inconsistencies when updating hwptr_done, we use double buffering
572 * for all URBs.
1da177e4 573 */
86e07d34
TI		 574static int prepare_playback_urb(struct snd_usb_substream *subs,
575 struct snd_pcm_runtime *runtime,
1da177e4
LT		 576 struct urb *urb)
577{
adc8d313
CL		 578 int i, stride;
579 unsigned int counts, frames, bytes;
1da177e4 580 unsigned long flags;
7efd8bc8 581 int period_elapsed = 0;
88518275 582 struct snd_urb_ctx *ctx = urb->context;
1da177e4
LT		 583
584 stride = runtime->frame_bits >> 3;
585
adc8d313 586 frames = 0;
1da177e4
LT		 587 urb->dev = ctx->subs->dev; /* we need to set this at each time */
588 urb->number_of_packets = 0;
589 spin_lock_irqsave(&subs->lock, flags);
590 for (i = 0; i < ctx->packets; i++) {
9568f461 591 counts = snd_usb_audio_next_packet_size(subs);
1da177e4 592 /* set up descriptor */
adc8d313 593 urb->iso_frame_desc[i].offset = frames * stride;
1da177e4 594 urb->iso_frame_desc[i].length = counts * stride;
adc8d313 595 frames += counts;
1da177e4 596 urb->number_of_packets++;
7efd8bc8
CL		 597 subs->transfer_done += counts;
598 if (subs->transfer_done >= runtime->period_size) {
599 subs->transfer_done -= runtime->period_size;
600 period_elapsed = 1;
1da177e4 601 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
7efd8bc8
CL		 602 if (subs->transfer_done > 0) {
603 /* FIXME: fill-max mode is not
604 * supported yet */
adc8d313 605 frames -= subs->transfer_done;
7efd8bc8
CL		 606 counts -= subs->transfer_done;
607 urb->iso_frame_desc[i].length =
608 counts * stride;
609 subs->transfer_done = 0;
1da177e4
LT		 610 }
611 i++;
612 if (i < ctx->packets) {
613 /* add a transfer delimiter */
7efd8bc8 614 urb->iso_frame_desc[i].offset =
adc8d313 615 frames * stride;
1da177e4
LT		 616 urb->iso_frame_desc[i].length = 0;
617 urb->number_of_packets++;
618 }
9624ea81 619 break;
1da177e4 620 }
1da177e4 621 }
a7d9c099 622 if (period_elapsed) /* finish at the period boundary */
9624ea81 623 break;
1da177e4 624 }
adc8d313
CL		 625 bytes = frames * stride;
626 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
7efd8bc8 627 /* err, the transferred area goes over buffer boundary. */
adc8d313
CL		 628 unsigned int bytes1 =
629 runtime->buffer_size * stride - subs->hwptr_done;
7efd8bc8 630 memcpy(urb->transfer_buffer,
adc8d313
CL		 631 runtime->dma_area + subs->hwptr_done, bytes1);
632 memcpy(urb->transfer_buffer + bytes1,
633 runtime->dma_area, bytes - bytes1);
1da177e4 634 } else {
7efd8bc8 635 memcpy(urb->transfer_buffer,
adc8d313 636 runtime->dma_area + subs->hwptr_done, bytes);
1da177e4 637 }
adc8d313
CL		 638 subs->hwptr_done += bytes;
639 if (subs->hwptr_done >= runtime->buffer_size * stride)
640 subs->hwptr_done -= runtime->buffer_size * stride;
641 runtime->delay += frames;
1da177e4 642 spin_unlock_irqrestore(&subs->lock, flags);
adc8d313 643 urb->transfer_buffer_length = bytes;
b55bbf06
CL		 644 if (period_elapsed)
645 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 646 return 0;
647}
648
649/*
650 * process after playback data complete
ae1ec5e1 651 * - decrease the delay count again
1da177e4 652 */
86e07d34
TI		 653static int retire_playback_urb(struct snd_usb_substream *subs,
654 struct snd_pcm_runtime *runtime,
1da177e4
LT		 655 struct urb *urb)
656{
ae1ec5e1
TI		 657 unsigned long flags;
658 int stride = runtime->frame_bits >> 3;
659 int processed = urb->transfer_buffer_length / stride;
660
661 spin_lock_irqsave(&subs->lock, flags);
662 if (processed > runtime->delay)
663 runtime->delay = 0;
664 else
665 runtime->delay -= processed;
666 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4
LT		 667 return 0;
668}
669
670
671/*
672 */
673static struct snd_urb_ops audio_urb_ops[2] = {
674 {
e4f8e656 675 .prepare = prepare_nodata_playback_urb,
1da177e4
LT		 676 .retire = retire_playback_urb,
677 .prepare_sync = prepare_playback_sync_urb,
678 .retire_sync = retire_playback_sync_urb,
679 },
680 {
681 .prepare = prepare_capture_urb,
682 .retire = retire_capture_urb,
683 .prepare_sync = prepare_capture_sync_urb,
684 .retire_sync = retire_capture_sync_urb,
685 },
686};
687
688static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
689 {
e4f8e656 690 .prepare = prepare_nodata_playback_urb,
1da177e4
LT		 691 .retire = retire_playback_urb,
692 .prepare_sync = prepare_playback_sync_urb_hs,
693 .retire_sync = retire_playback_sync_urb_hs,
694 },
695 {
696 .prepare = prepare_capture_urb,
697 .retire = retire_capture_urb,
698 .prepare_sync = prepare_capture_sync_urb_hs,
699 .retire_sync = retire_capture_sync_urb,
700 },
701};
702
703/*
704 * complete callback from data urb
705 */
7d12e780 706static void snd_complete_urb(struct urb *urb)
1da177e4 707{
88518275 708 struct snd_urb_ctx *ctx = urb->context;
86e07d34
TI		 709 struct snd_usb_substream *subs = ctx->subs;
710 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 711 int err = 0;
712
713 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
07f51a72 714 !subs->running || /* can be stopped during retire callback */
1da177e4
LT		 715 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
716 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
717 clear_bit(ctx->index, &subs->active_mask);
718 if (err < 0) {
719 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
720 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
721 }
722 }
723}
724
725
726/*
727 * complete callback from sync urb
728 */
7d12e780 729static void snd_complete_sync_urb(struct urb *urb)
1da177e4 730{
88518275 731 struct snd_urb_ctx *ctx = urb->context;
86e07d34
TI		 732 struct snd_usb_substream *subs = ctx->subs;
733 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 734 int err = 0;
735
736 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
07f51a72 737 !subs->running || /* can be stopped during retire callback */
1da177e4
LT		 738 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
739 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
740 clear_bit(ctx->index + 16, &subs->active_mask);
741 if (err < 0) {
742 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
743 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
744 }
745 }
746}
747
748
749/*
750 * unlink active urbs.
751 */
86e07d34 752static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
1da177e4
LT		 753{
754 unsigned int i;
755 int async;
756
757 subs->running = 0;
758
759 if (!force && subs->stream->chip->shutdown) /* to be sure... */
760 return -EBADFD;
761
762 async = !can_sleep && async_unlink;
763
07f51a72 764 if (!async && in_interrupt())
1da177e4
LT		 765 return 0;
766
767 for (i = 0; i < subs->nurbs; i++) {
768 if (test_bit(i, &subs->active_mask)) {
07f51a72 769 if (!test_and_set_bit(i, &subs->unlink_mask)) {
1da177e4 770 struct urb *u = subs->dataurb[i].urb;
b375a049 771 if (async)
1da177e4 772 usb_unlink_urb(u);
b375a049 773 else
1da177e4
LT		 774 usb_kill_urb(u);
775 }
776 }
777 }
778 if (subs->syncpipe) {
779 for (i = 0; i < SYNC_URBS; i++) {
780 if (test_bit(i+16, &subs->active_mask)) {
07f51a72 781 if (!test_and_set_bit(i+16, &subs->unlink_mask)) {
1da177e4 782 struct urb *u = subs->syncurb[i].urb;
b375a049 783 if (async)
1da177e4 784 usb_unlink_urb(u);
b375a049 785 else
1da177e4
LT		 786 usb_kill_urb(u);
787 }
788 }
789 }
790 }
791 return 0;
792}
793
794
32e19e88
CL		 795static const char *usb_error_string(int err)
796{
797 switch (err) {
798 case -ENODEV:
799 return "no device";
800 case -ENOENT:
801 return "endpoint not enabled";
802 case -EPIPE:
803 return "endpoint stalled";
804 case -ENOSPC:
805 return "not enough bandwidth";
806 case -ESHUTDOWN:
807 return "device disabled";
808 case -EHOSTUNREACH:
809 return "device suspended";
810 case -EINVAL:
811 case -EAGAIN:
812 case -EFBIG:
813 case -EMSGSIZE:
814 return "internal error";
815 default:
816 return "unknown error";
817 }
818}
819
1da177e4
LT		 820/*
821 * set up and start data/sync urbs
822 */
86e07d34 823static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
1da177e4
LT		 824{
825 unsigned int i;
826 int err;
827
828 if (subs->stream->chip->shutdown)
829 return -EBADFD;
830
831 for (i = 0; i < subs->nurbs; i++) {
5e246b85
TI		 832 if (snd_BUG_ON(!subs->dataurb[i].urb))
833 return -EINVAL;
1da177e4
LT		 834 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
835 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
836 goto __error;
837 }
838 }
839 if (subs->syncpipe) {
840 for (i = 0; i < SYNC_URBS; i++) {
5e246b85
TI		 841 if (snd_BUG_ON(!subs->syncurb[i].urb))
842 return -EINVAL;
1da177e4
LT		 843 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
844 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
845 goto __error;
846 }
847 }
848 }
849
850 subs->active_mask = 0;
851 subs->unlink_mask = 0;
852 subs->running = 1;
853 for (i = 0; i < subs->nurbs; i++) {
32e19e88
CL		 854 err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC);
855 if (err < 0) {
856 snd_printk(KERN_ERR "cannot submit datapipe "
857 "for urb %d, error %d: %s\n",
858 i, err, usb_error_string(err));
1da177e4
LT		 859 goto __error;
860 }
861 set_bit(i, &subs->active_mask);
862 }
863 if (subs->syncpipe) {
864 for (i = 0; i < SYNC_URBS; i++) {
32e19e88
CL		 865 err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC);
866 if (err < 0) {
867 snd_printk(KERN_ERR "cannot submit syncpipe "
868 "for urb %d, error %d: %s\n",
869 i, err, usb_error_string(err));
1da177e4
LT		 870 goto __error;
871 }
872 set_bit(i + 16, &subs->active_mask);
873 }
874 }
875 return 0;
876
877 __error:
878 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
879 deactivate_urbs(subs, 0, 0);
880 return -EPIPE;
881}
882
883
884/*
885 * wait until all urbs are processed.
886 */
86e07d34 887static int wait_clear_urbs(struct snd_usb_substream *subs)
1da177e4 888{
b27c187f 889 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 890 unsigned int i;
891 int alive;
892
893 do {
894 alive = 0;
895 for (i = 0; i < subs->nurbs; i++) {
896 if (test_bit(i, &subs->active_mask))
897 alive++;
898 }
899 if (subs->syncpipe) {
900 for (i = 0; i < SYNC_URBS; i++) {
901 if (test_bit(i + 16, &subs->active_mask))
902 alive++;
903 }
904 }
905 if (! alive)
906 break;
8433a509 907 schedule_timeout_uninterruptible(1);
b27c187f 908 } while (time_before(jiffies, end_time));
1da177e4
LT		 909 if (alive)
910 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
911 return 0;
912}
913
914
915/*
adc8d313 916 * return the current pcm pointer. just based on the hwptr_done value.
1da177e4 917 */
86e07d34 918static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 919{
86e07d34 920 struct snd_usb_substream *subs;
adc8d313 921 unsigned int hwptr_done;
daa150ef 922
86e07d34 923 subs = (struct snd_usb_substream *)substream->runtime->private_data;
daa150ef
CL		 924 spin_lock(&subs->lock);
925 hwptr_done = subs->hwptr_done;
926 spin_unlock(&subs->lock);
adc8d313 927 return hwptr_done / (substream->runtime->frame_bits >> 3);
1da177e4
LT		 928}
929
930
931/*
b55bbf06 932 * start/stop playback substream
1da177e4 933 */
86e07d34 934static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
b55bbf06 935 int cmd)
1da177e4 936{
86e07d34 937 struct snd_usb_substream *subs = substream->runtime->private_data;
b55bbf06
CL		 938
939 switch (cmd) {
940 case SNDRV_PCM_TRIGGER_START:
e4f8e656 941 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
b55bbf06
CL		 942 subs->ops.prepare = prepare_playback_urb;
943 return 0;
944 case SNDRV_PCM_TRIGGER_STOP:
945 return deactivate_urbs(subs, 0, 0);
e4f8e656
CL		 946 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
947 subs->ops.prepare = prepare_nodata_playback_urb;
948 return 0;
b55bbf06
CL		 949 default:
950 return -EINVAL;
951 }
952}
953
954/*
955 * start/stop capture substream
956 */
86e07d34 957static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
b55bbf06
CL		 958 int cmd)
959{
86e07d34 960 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 961
962 switch (cmd) {
963 case SNDRV_PCM_TRIGGER_START:
e4f8e656 964 subs->ops.retire = retire_capture_urb;
b55bbf06 965 return start_urbs(subs, substream->runtime);
1da177e4 966 case SNDRV_PCM_TRIGGER_STOP:
b55bbf06 967 return deactivate_urbs(subs, 0, 0);
e4f8e656
CL		 968 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
969 subs->ops.retire = retire_paused_capture_urb;
970 return 0;
971 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
972 subs->ops.retire = retire_capture_urb;
973 return 0;
1da177e4 974 default:
b55bbf06 975 return -EINVAL;
1da177e4 976 }
1da177e4
LT		 977}
978
979
980/*
981 * release a urb data
982 */
86e07d34 983static void release_urb_ctx(struct snd_urb_ctx *u)
1da177e4
LT		 984{
985 if (u->urb) {
55851f73
CL		 986 if (u->buffer_size)
987 usb_buffer_free(u->subs->dev, u->buffer_size,
988 u->urb->transfer_buffer,
989 u->urb->transfer_dma);
1da177e4
LT		 990 usb_free_urb(u->urb);
991 u->urb = NULL;
992 }
1da177e4
LT		 993}
994
995/*
996 * release a substream
997 */
86e07d34 998static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1da177e4
LT		 999{
1000 int i;
1001
1002 /* stop urbs (to be sure) */
1003 deactivate_urbs(subs, force, 1);
1004 wait_clear_urbs(subs);
1005
1006 for (i = 0; i < MAX_URBS; i++)
1007 release_urb_ctx(&subs->dataurb[i]);
1008 for (i = 0; i < SYNC_URBS; i++)
1009 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 1010 usb_buffer_free(subs->dev, SYNC_URBS * 4,
1011 subs->syncbuf, subs->sync_dma);
1012 subs->syncbuf = NULL;
1da177e4
LT		 1013 subs->nurbs = 0;
1014}
1015
1016/*
1017 * initialize a substream for plaback/capture
1018 */
86e07d34 1019static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1da177e4
LT		 1020 unsigned int rate, unsigned int frame_bits)
1021{
160389c8 1022 unsigned int maxsize, i;
1da177e4 1023 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
160389c8 1024 unsigned int urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 1025
1026 /* calculate the frequency in 16.16 format */
1027 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1028 subs->freqn = get_usb_full_speed_rate(rate);
1029 else
1030 subs->freqn = get_usb_high_speed_rate(rate);
1031 subs->freqm = subs->freqn;
573567e0
CL		 1032 /* calculate max. frequency */
1033 if (subs->maxpacksize) {
1034 /* whatever fits into a max. size packet */
1da177e4 1035 maxsize = subs->maxpacksize;
573567e0
CL		 1036 subs->freqmax = (maxsize / (frame_bits >> 3))
1037 << (16 - subs->datainterval);
1038 } else {
1039 /* no max. packet size: just take 25% higher than nominal */
1040 subs->freqmax = subs->freqn + (subs->freqn >> 2);
1041 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
1042 >> (16 - subs->datainterval);
1da177e4 1043 }
573567e0 1044 subs->phase = 0;
1da177e4
LT		 1045
1046 if (subs->fill_max)
1047 subs->curpacksize = subs->maxpacksize;
1048 else
1049 subs->curpacksize = maxsize;
1050
a93bf990
CL		 1051 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
1052 packs_per_ms = 8 >> subs->datainterval;
1053 else
1054 packs_per_ms = 1;
1055
71d848ca 1056 if (is_playback) {
f3990e61 1057 urb_packs = max(nrpacks, 1);
71d848ca
CL		 1058 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
1059 } else
15a24c07 1060 urb_packs = 1;
a93bf990 1061 urb_packs *= packs_per_ms;
765e8db0 1062 if (subs->syncpipe)
f1e6d3c5 1063 urb_packs = min(urb_packs, 1U << subs->syncinterval);
1da177e4 1064
1da177e4 1065 /* decide how many packets to be used */
15a24c07 1066 if (is_playback) {
4d788e04 1067 unsigned int minsize, maxpacks;
d6db392e
CL		 1068 /* determine how small a packet can be */
1069 minsize = (subs->freqn >> (16 - subs->datainterval))
1070 * (frame_bits >> 3);
7efd8bc8 1071 /* with sync from device, assume it can be 12% lower */
d6db392e 1072 if (subs->syncpipe)
7efd8bc8 1073 minsize -= minsize >> 3;
d6db392e
CL		 1074 minsize = max(minsize, 1u);
1075 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990 1076 /* we need at least two URBs for queueing */
a7d9c099
CL		 1077 if (total_packs < 2) {
1078 total_packs = 2;
f3990e61 1079 } else {
4d788e04 1080 /* and we don't want too long a queue either */
b1c86bb8
CL		 1081 maxpacks = max(MAX_QUEUE * packs_per_ms, urb_packs * 2);
1082 total_packs = min(total_packs, maxpacks);
4d788e04 1083 }
15a24c07 1084 } else {
a7d9c099
CL		 1085 while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
1086 urb_packs >>= 1;
15a24c07
CL		 1087 total_packs = MAX_URBS * urb_packs;
1088 }
1da177e4
LT		 1089 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1090 if (subs->nurbs > MAX_URBS) {
1091 /* too much... */
1092 subs->nurbs = MAX_URBS;
1093 total_packs = MAX_URBS * urb_packs;
160389c8 1094 } else if (subs->nurbs < 2) {
1da177e4
LT		 1095 /* too little - we need at least two packets
1096 * to ensure contiguous playback/capture
1097 */
1098 subs->nurbs = 2;
1da177e4
LT		 1099 }
1100
1101 /* allocate and initialize data urbs */
1102 for (i = 0; i < subs->nurbs; i++) {
86e07d34 1103 struct snd_urb_ctx *u = &subs->dataurb[i];
1da177e4
LT		 1104 u->index = i;
1105 u->subs = subs;
160389c8
CL		 1106 u->packets = (i + 1) * total_packs / subs->nurbs
1107 - i * total_packs / subs->nurbs;
55851f73 1108 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1109 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1110 u->packets++; /* for transfer delimiter */
1da177e4 1111 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
07f51a72 1112 if (!u->urb)
55851f73
CL		 1113 goto out_of_memory;
1114 u->urb->transfer_buffer =
1115 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1116 &u->urb->transfer_dma);
07f51a72 1117 if (!u->urb->transfer_buffer)
55851f73 1118 goto out_of_memory;
1da177e4 1119 u->urb->pipe = subs->datapipe;
55851f73 1120 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1121 u->urb->interval = 1 << subs->datainterval;
1da177e4 1122 u->urb->context = u;
3527a008 1123 u->urb->complete = snd_complete_urb;
1da177e4
LT		 1124 }
1125
1126 if (subs->syncpipe) {
1127 /* allocate and initialize sync urbs */
55851f73
CL		 1128 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1129 GFP_KERNEL, &subs->sync_dma);
07f51a72 1130 if (!subs->syncbuf)
55851f73 1131 goto out_of_memory;
1da177e4 1132 for (i = 0; i < SYNC_URBS; i++) {
86e07d34 1133 struct snd_urb_ctx *u = &subs->syncurb[i];
1da177e4
LT		 1134 u->index = i;
1135 u->subs = subs;
ca81090a
CL		 1136 u->packets = 1;
1137 u->urb = usb_alloc_urb(1, GFP_KERNEL);
07f51a72 1138 if (!u->urb)
55851f73 1139 goto out_of_memory;
ca81090a 1140 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1141 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1142 u->urb->transfer_buffer_length = 4;
1da177e4 1143 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1144 u->urb->transfer_flags = URB_ISO_ASAP |
1145 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1146 u->urb->number_of_packets = 1;
1149a64f 1147 u->urb->interval = 1 << subs->syncinterval;
1da177e4 1148 u->urb->context = u;
3527a008 1149 u->urb->complete = snd_complete_sync_urb;
1da177e4
LT		 1150 }
1151 }
1152 return 0;
55851f73
CL		 1153
1154out_of_memory:
1155 release_substream_urbs(subs, 0);
1156 return -ENOMEM;
1da177e4
LT		 1157}
1158
1159
1160/*
1161 * find a matching audio format
1162 */
86e07d34 1163static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1da177e4
LT		 1164 unsigned int rate, unsigned int channels)
1165{
1166 struct list_head *p;
1167 struct audioformat *found = NULL;
1168 int cur_attr = 0, attr;
1169
1170 list_for_each(p, &subs->fmt_list) {
1171 struct audioformat *fp;
1172 fp = list_entry(p, struct audioformat, list);
1173 if (fp->format != format || fp->channels != channels)
1174 continue;
1175 if (rate < fp->rate_min || rate > fp->rate_max)
1176 continue;
1177 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1178 unsigned int i;
1179 for (i = 0; i < fp->nr_rates; i++)
1180 if (fp->rate_table[i] == rate)
1181 break;
1182 if (i >= fp->nr_rates)
1183 continue;
1184 }
1185 attr = fp->ep_attr & EP_ATTR_MASK;
1186 if (! found) {
1187 found = fp;
1188 cur_attr = attr;
1189 continue;
1190 }
1191 /* avoid async out and adaptive in if the other method
1192 * supports the same format.
1193 * this is a workaround for the case like
1194 * M-audio audiophile USB.
1195 */
1196 if (attr != cur_attr) {
1197 if ((attr == EP_ATTR_ASYNC &&
1198 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1199 (attr == EP_ATTR_ADAPTIVE &&
1200 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1201 continue;
1202 if ((cur_attr == EP_ATTR_ASYNC &&
1203 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1204 (cur_attr == EP_ATTR_ADAPTIVE &&
1205 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1206 found = fp;
1207 cur_attr = attr;
1208 continue;
1209 }
1210 }
1211 /* find the format with the largest max. packet size */
1212 if (fp->maxpacksize > found->maxpacksize) {
1213 found = fp;
1214 cur_attr = attr;
1215 }
1216 }
1217 return found;
1218}
1219
1220
1221/*
1222 * initialize the picth control and sample rate
1223 */
1224static int init_usb_pitch(struct usb_device *dev, int iface,
1225 struct usb_host_interface *alts,
1226 struct audioformat *fmt)
1227{
1228 unsigned int ep;
1229 unsigned char data[1];
1230 int err;
1231
1232 ep = get_endpoint(alts, 0)->bEndpointAddress;
1233 /* if endpoint has pitch control, enable it */
1234 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1235 data[0] = 1;
1236 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1237 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1238 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1239 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1240 dev->devnum, iface, ep);
1241 return err;
1242 }
1243 }
1244 return 0;
1245}
1246
1247static int init_usb_sample_rate(struct usb_device *dev, int iface,
1248 struct usb_host_interface *alts,
1249 struct audioformat *fmt, int rate)
1250{
1251 unsigned int ep;
1252 unsigned char data[3];
1253 int err;
1254
1255 ep = get_endpoint(alts, 0)->bEndpointAddress;
1256 /* if endpoint has sampling rate control, set it */
1257 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1258 int crate;
1259 data[0] = rate;
1260 data[1] = rate >> 8;
1261 data[2] = rate >> 16;
1262 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1263 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1264 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
b9d710b3 1265 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep %#x\n",
1da177e4
LT		 1266 dev->devnum, iface, fmt->altsetting, rate, ep);
1267 return err;
1268 }
1269 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1270 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1271 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
b9d710b3 1272 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep %#x\n",
1da177e4
LT		 1273 dev->devnum, iface, fmt->altsetting, ep);
1274 return 0; /* some devices don't support reading */
1275 }
1276 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1277 if (crate != rate) {
1278 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1279 // runtime->rate = crate;
1280 }
1281 }
1282 return 0;
1283}
1284
7d2b451e
SK		 1285/*
1286 * For E-Mu 0404USB/0202USB/TrackerPre sample rate should be set for device,
1287 * not for interface.
1288 */
1289static void set_format_emu_quirk(struct snd_usb_substream *subs,
1290 struct audioformat *fmt)
1291{
1292 unsigned char emu_samplerate_id = 0;
1293
1294 /* When capture is active
1295 * sample rate shouldn't be changed
1296 * by playback substream
1297 */
1298 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1299 if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
1300 return;
1301 }
1302
1303 switch (fmt->rate_min) {
1304 case 48000:
1305 emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
1306 break;
1307 case 88200:
1308 emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
1309 break;
1310 case 96000:
1311 emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
1312 break;
1313 case 176400:
1314 emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
1315 break;
1316 case 192000:
1317 emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
1318 break;
1319 default:
1320 emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
1321 break;
1322 }
1323 snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
1324}
1325
1da177e4
LT		 1326/*
1327 * find a matching format and set up the interface
1328 */
86e07d34 1329static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1da177e4
LT		 1330{
1331 struct usb_device *dev = subs->dev;
1332 struct usb_host_interface *alts;
1333 struct usb_interface_descriptor *altsd;
1334 struct usb_interface *iface;
1335 unsigned int ep, attr;
1336 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1337 int err;
1338
1339 iface = usb_ifnum_to_if(dev, fmt->iface);
5e246b85
TI		 1340 if (WARN_ON(!iface))
1341 return -EINVAL;
1da177e4
LT		 1342 alts = &iface->altsetting[fmt->altset_idx];
1343 altsd = get_iface_desc(alts);
5e246b85
TI		 1344 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
1345 return -EINVAL;
1da177e4
LT		 1346
1347 if (fmt == subs->cur_audiofmt)
1348 return 0;
1349
1350 /* close the old interface */
1351 if (subs->interface >= 0 && subs->interface != fmt->iface) {
5149fe2c
ON		 1352 if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
1353 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
1354 dev->devnum, fmt->iface, fmt->altsetting);
1355 return -EIO;
1356 }
1da177e4
LT		 1357 subs->interface = -1;
1358 subs->format = 0;
1359 }
1360
1361 /* set interface */
1362 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1363 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1364 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1365 dev->devnum, fmt->iface, fmt->altsetting);
1366 return -EIO;
1367 }
1368 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1369 subs->interface = fmt->iface;
1370 subs->format = fmt->altset_idx;
1371 }
1372
1373 /* create a data pipe */
1374 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1375 if (is_playback)
1376 subs->datapipe = usb_sndisocpipe(dev, ep);
1377 else
1378 subs->datapipe = usb_rcvisocpipe(dev, ep);
744b89e5 1379 subs->datainterval = fmt->datainterval;
1da177e4
LT		 1380 subs->syncpipe = subs->syncinterval = 0;
1381 subs->maxpacksize = fmt->maxpacksize;
1382 subs->fill_max = 0;
1383
1384 /* we need a sync pipe in async OUT or adaptive IN mode */
1385 /* check the number of EP, since some devices have broken
1386 * descriptors which fool us. if it has only one EP,
1387 * assume it as adaptive-out or sync-in.
1388 */
1389 attr = fmt->ep_attr & EP_ATTR_MASK;
1390 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1391 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1392 altsd->bNumEndpoints >= 2) {
1393 /* check sync-pipe endpoint */
1394 /* ... and check descriptor size before accessing bSynchAddress
1395 because there is a version of the SB Audigy 2 NX firmware lacking
1396 the audio fields in the endpoint descriptors */
1397 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1398 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1399 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1400 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1401 dev->devnum, fmt->iface, fmt->altsetting);
1402 return -EINVAL;
1403 }
1404 ep = get_endpoint(alts, 1)->bEndpointAddress;
1405 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1406 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1407 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1408 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1409 dev->devnum, fmt->iface, fmt->altsetting);
1410 return -EINVAL;
1411 }
1412 ep &= USB_ENDPOINT_NUMBER_MASK;
1413 if (is_playback)
1414 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1415 else
1416 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1417 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1418 get_endpoint(alts, 1)->bRefresh >= 1 &&
1419 get_endpoint(alts, 1)->bRefresh <= 9)
1420 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1421 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1422 subs->syncinterval = 1;
604cf499
CL		 1423 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1424 get_endpoint(alts, 1)->bInterval <= 16)
1425 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1426 else
1427 subs->syncinterval = 3;
1da177e4
LT		 1428 }
1429
1430 /* always fill max packet size */
1431 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1432 subs->fill_max = 1;
1433
1434 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1435 return err;
1436
1437 subs->cur_audiofmt = fmt;
1438
7d2b451e
SK		 1439 switch (subs->stream->chip->usb_id) {
1440 case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
1441 case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
1442 case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1443 set_format_emu_quirk(subs, fmt);
1444 break;
1445 }
1446
1da177e4 1447#if 0
54530bde
TI		 1448 printk(KERN_DEBUG
1449 "setting done: format = %d, rate = %d..%d, channels = %d\n",
2a56f51b 1450 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
54530bde
TI		 1451 printk(KERN_DEBUG
1452 " datapipe = 0x%0x, syncpipe = 0x%0x\n",
1da177e4
LT		 1453 subs->datapipe, subs->syncpipe);
1454#endif
1455
1456 return 0;
1457}
1458
1459/*
1460 * hw_params callback
1461 *
1462 * allocate a buffer and set the given audio format.
1463 *
1464 * so far we use a physically linear buffer although packetize transfer
1465 * doesn't need a continuous area.
1466 * if sg buffer is supported on the later version of alsa, we'll follow
1467 * that.
1468 */
86e07d34
TI		 1469static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1470 struct snd_pcm_hw_params *hw_params)
1da177e4 1471{
88518275 1472 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 1473 struct audioformat *fmt;
1474 unsigned int channels, rate, format;
1475 int ret, changed;
1476
c55675e3
CL		 1477 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
1478 params_buffer_bytes(hw_params));
1da177e4
LT		 1479 if (ret < 0)
1480 return ret;
1481
1482 format = params_format(hw_params);
1483 rate = params_rate(hw_params);
1484 channels = params_channels(hw_params);
1485 fmt = find_format(subs, format, rate, channels);
07f51a72 1486 if (!fmt) {
b9d710b3 1487 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
21a3479a 1488 format, rate, channels);
1da177e4
LT		 1489 return -EINVAL;
1490 }
1491
1492 changed = subs->cur_audiofmt != fmt ||
1493 subs->period_bytes != params_period_bytes(hw_params) ||
1494 subs->cur_rate != rate;
1495 if ((ret = set_format(subs, fmt)) < 0)
1496 return ret;
1497
1498 if (subs->cur_rate != rate) {
1499 struct usb_host_interface *alts;
1500 struct usb_interface *iface;
1501 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1502 alts = &iface->altsetting[fmt->altset_idx];
1503 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1504 if (ret < 0)
1505 return ret;
1506 subs->cur_rate = rate;
1507 }
1508
1509 if (changed) {
1510 /* format changed */
1511 release_substream_urbs(subs, 0);
1512 /* influenced: period_bytes, channels, rate, format, */
1513 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1514 params_rate(hw_params),
1515 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1516 }
1517
1518 return ret;
1519}
1520
1521/*
1522 * hw_free callback
1523 *
1524 * reset the audio format and release the buffer
1525 */
86e07d34 1526static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1da177e4 1527{
88518275 1528 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 1529
1530 subs->cur_audiofmt = NULL;
1531 subs->cur_rate = 0;
1532 subs->period_bytes = 0;
de1b8b93
TI		 1533 if (!subs->stream->chip->shutdown)
1534 release_substream_urbs(subs, 0);
c55675e3 1535 return snd_pcm_lib_free_vmalloc_buffer(substream);
1da177e4
LT		 1536}
1537
1538/*
1539 * prepare callback
1540 *
1541 * only a few subtle things...
1542 */
86e07d34 1543static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 1544{
86e07d34
TI		 1545 struct snd_pcm_runtime *runtime = substream->runtime;
1546 struct snd_usb_substream *subs = runtime->private_data;
1da177e4
LT		 1547
1548 if (! subs->cur_audiofmt) {
1549 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1550 return -ENXIO;
1551 }
1552
1553 /* some unit conversions in runtime */
1554 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1555 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1556
1557 /* reset the pointer */
1da177e4 1558 subs->hwptr_done = 0;
1da177e4
LT		 1559 subs->transfer_done = 0;
1560 subs->phase = 0;
ae1ec5e1 1561 runtime->delay = 0;
1da177e4
LT		 1562
1563 /* clear urbs (to be sure) */
1564 deactivate_urbs(subs, 0, 1);
1565 wait_clear_urbs(subs);
1566
b55bbf06
CL		 1567 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1568 * updates for all URBs would happen at the same time when starting */
1569 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
e4f8e656 1570 subs->ops.prepare = prepare_nodata_playback_urb;
b55bbf06
CL		 1571 return start_urbs(subs, runtime);
1572 } else
1573 return 0;
1da177e4
LT		 1574}
1575
1700f308 1576static struct snd_pcm_hardware snd_usb_hardware =
1da177e4 1577{
49045d3d
CL		 1578 .info = SNDRV_PCM_INFO_MMAP |
1579 SNDRV_PCM_INFO_MMAP_VALID |
1580 SNDRV_PCM_INFO_BATCH |
1581 SNDRV_PCM_INFO_INTERLEAVED |
e4f8e656
CL		 1582 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1583 SNDRV_PCM_INFO_PAUSE,
d31cbbfd 1584 .buffer_bytes_max = 1024 * 1024,
1da177e4 1585 .period_bytes_min = 64,
d31cbbfd 1586 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1587 .periods_min = 2,
1588 .periods_max = 1024,
1589};
1590
1591/*
1592 * h/w constraints
1593 */
1594
1595#ifdef HW_CONST_DEBUG
1596#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1597#else
1598#define hwc_debug(fmt, args...) /**/
1599#endif
1600
a7d9c099
CL		 1601static int hw_check_valid_format(struct snd_usb_substream *subs,
1602 struct snd_pcm_hw_params *params,
1603 struct audioformat *fp)
1da177e4 1604{
86e07d34
TI		 1605 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1606 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1607 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
a7d9c099
CL		 1608 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
1609 unsigned int ptime;
1da177e4
LT		 1610
1611 /* check the format */
07f51a72 1612 if (!snd_mask_test(fmts, fp->format)) {
1da177e4
LT		 1613 hwc_debug(" > check: no supported format %d\n", fp->format);
1614 return 0;
1615 }
1616 /* check the channels */
1617 if (fp->channels < ct->min || fp->channels > ct->max) {
1618 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1619 return 0;
1620 }
1621 /* check the rate is within the range */
1622 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1623 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1624 return 0;
1625 }
1626 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1627 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1628 return 0;
1629 }
a7d9c099
CL		 1630 /* check whether the period time is >= the data packet interval */
1631 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) {
1632 ptime = 125 * (1 << fp->datainterval);
1633 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
1634 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
1635 return 0;
1636 }
1637 }
1da177e4
LT		 1638 return 1;
1639}
1640
86e07d34
TI		 1641static int hw_rule_rate(struct snd_pcm_hw_params *params,
1642 struct snd_pcm_hw_rule *rule)
1da177e4 1643{
86e07d34 1644 struct snd_usb_substream *subs = rule->private;
1da177e4 1645 struct list_head *p;
86e07d34 1646 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 1647 unsigned int rmin, rmax;
1648 int changed;
1649
1650 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1651 changed = 0;
1652 rmin = rmax = 0;
1653 list_for_each(p, &subs->fmt_list) {
1654 struct audioformat *fp;
1655 fp = list_entry(p, struct audioformat, list);
a7d9c099 1656 if (!hw_check_valid_format(subs, params, fp))
1da177e4
LT		 1657 continue;
1658 if (changed++) {
1659 if (rmin > fp->rate_min)
1660 rmin = fp->rate_min;
1661 if (rmax < fp->rate_max)
1662 rmax = fp->rate_max;
1663 } else {
1664 rmin = fp->rate_min;
1665 rmax = fp->rate_max;
1666 }
1667 }
1668
07f51a72 1669 if (!changed) {
1da177e4
LT		 1670 hwc_debug(" --> get empty\n");
1671 it->empty = 1;
1672 return -EINVAL;
1673 }
1674
1675 changed = 0;
1676 if (it->min < rmin) {
1677 it->min = rmin;
1678 it->openmin = 0;
1679 changed = 1;
1680 }
1681 if (it->max > rmax) {
1682 it->max = rmax;
1683 it->openmax = 0;
1684 changed = 1;
1685 }
1686 if (snd_interval_checkempty(it)) {
1687 it->empty = 1;
1688 return -EINVAL;
1689 }
1690 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1691 return changed;
1692}
1693
1694
86e07d34
TI		 1695static int hw_rule_channels(struct snd_pcm_hw_params *params,
1696 struct snd_pcm_hw_rule *rule)
1da177e4 1697{
86e07d34 1698 struct snd_usb_substream *subs = rule->private;
1da177e4 1699 struct list_head *p;
86e07d34 1700 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1da177e4
LT		 1701 unsigned int rmin, rmax;
1702 int changed;
1703
1704 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1705 changed = 0;
1706 rmin = rmax = 0;
1707 list_for_each(p, &subs->fmt_list) {
1708 struct audioformat *fp;
1709 fp = list_entry(p, struct audioformat, list);
a7d9c099 1710 if (!hw_check_valid_format(subs, params, fp))
1da177e4
LT		 1711 continue;
1712 if (changed++) {
1713 if (rmin > fp->channels)
1714 rmin = fp->channels;
1715 if (rmax < fp->channels)
1716 rmax = fp->channels;
1717 } else {
1718 rmin = fp->channels;
1719 rmax = fp->channels;
1720 }
1721 }
1722
07f51a72 1723 if (!changed) {
1da177e4
LT		 1724 hwc_debug(" --> get empty\n");
1725 it->empty = 1;
1726 return -EINVAL;
1727 }
1728
1729 changed = 0;
1730 if (it->min < rmin) {
1731 it->min = rmin;
1732 it->openmin = 0;
1733 changed = 1;
1734 }
1735 if (it->max > rmax) {
1736 it->max = rmax;
1737 it->openmax = 0;
1738 changed = 1;
1739 }
1740 if (snd_interval_checkempty(it)) {
1741 it->empty = 1;
1742 return -EINVAL;
1743 }
1744 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1745 return changed;
1746}
1747
86e07d34
TI		 1748static int hw_rule_format(struct snd_pcm_hw_params *params,
1749 struct snd_pcm_hw_rule *rule)
1da177e4 1750{
86e07d34 1751 struct snd_usb_substream *subs = rule->private;
1da177e4 1752 struct list_head *p;
86e07d34 1753 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1754 u64 fbits;
1755 u32 oldbits[2];
1756 int changed;
1757
1758 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1759 fbits = 0;
1760 list_for_each(p, &subs->fmt_list) {
1761 struct audioformat *fp;
1762 fp = list_entry(p, struct audioformat, list);
a7d9c099 1763 if (!hw_check_valid_format(subs, params, fp))
1da177e4
LT		 1764 continue;
1765 fbits |= (1ULL << fp->format);
1766 }
1767
1768 oldbits[0] = fmt->bits[0];
1769 oldbits[1] = fmt->bits[1];
1770 fmt->bits[0] &= (u32)fbits;
1771 fmt->bits[1] &= (u32)(fbits >> 32);
07f51a72 1772 if (!fmt->bits[0] && !fmt->bits[1]) {
1da177e4
LT		 1773 hwc_debug(" --> get empty\n");
1774 return -EINVAL;
1775 }
1776 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1777 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1778 return changed;
1779}
1780
a7d9c099
CL		 1781static int hw_rule_period_time(struct snd_pcm_hw_params *params,
1782 struct snd_pcm_hw_rule *rule)
1783{
1784 struct snd_usb_substream *subs = rule->private;
1785 struct audioformat *fp;
1786 struct snd_interval *it;
1787 unsigned char min_datainterval;
1788 unsigned int pmin;
1789 int changed;
1790
1791 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
1792 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
1793 min_datainterval = 0xff;
1794 list_for_each_entry(fp, &subs->fmt_list, list) {
1795 if (!hw_check_valid_format(subs, params, fp))
1796 continue;
1797 min_datainterval = min(min_datainterval, fp->datainterval);
1798 }
1799 if (min_datainterval == 0xff) {
1800 hwc_debug(" --> get emtpy\n");
1801 it->empty = 1;
1802 return -EINVAL;
1803 }
1804 pmin = 125 * (1 << min_datainterval);
1805 changed = 0;
1806 if (it->min < pmin) {
1807 it->min = pmin;
1808 it->openmin = 0;
1809 changed = 1;
1810 }
1811 if (snd_interval_checkempty(it)) {
1812 it->empty = 1;
1813 return -EINVAL;
1814 }
1815 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
1816 return changed;
1817}
1818
a79eee8d
LR		 1819/*
1820 * If the device supports unusual bit rates, does the request meet these?
1821 */
1822static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1823 struct snd_usb_substream *subs)
1824{
8fec560d
TI		 1825 struct audioformat *fp;
1826 int count = 0, needs_knot = 0;
a79eee8d
LR		 1827 int err;
1828
8fec560d
TI		 1829 list_for_each_entry(fp, &subs->fmt_list, list) {
1830 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1831 return 0;
1832 count += fp->nr_rates;
918f3a0e 1833 if (fp->rates & SNDRV_PCM_RATE_KNOT)
8fec560d 1834 needs_knot = 1;
a79eee8d 1835 }
8fec560d
TI		 1836 if (!needs_knot)
1837 return 0;
1838
1839 subs->rate_list.count = count;
1840 subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
1841 subs->rate_list.mask = 0;
1842 count = 0;
1843 list_for_each_entry(fp, &subs->fmt_list, list) {
1844 int i;
1845 for (i = 0; i < fp->nr_rates; i++)
1846 subs->rate_list.list[count++] = fp->rate_table[i];
1847 }
1848 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1849 &subs->rate_list);
1850 if (err < 0)
1851 return err;
a79eee8d
LR		 1852
1853 return 0;
1854}
1855
1da177e4
LT		 1856
1857/*
1858 * set up the runtime hardware information.
1859 */
1860
86e07d34 1861static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1da177e4
LT		 1862{
1863 struct list_head *p;
a7d9c099
CL		 1864 unsigned int pt, ptmin;
1865 int param_period_time_if_needed;
1da177e4
LT		 1866 int err;
1867
1868 runtime->hw.formats = subs->formats;
1869
1870 runtime->hw.rate_min = 0x7fffffff;
1871 runtime->hw.rate_max = 0;
1872 runtime->hw.channels_min = 256;
1873 runtime->hw.channels_max = 0;
1874 runtime->hw.rates = 0;
a7d9c099 1875 ptmin = UINT_MAX;
1da177e4
LT		 1876 /* check min/max rates and channels */
1877 list_for_each(p, &subs->fmt_list) {
1878 struct audioformat *fp;
1879 fp = list_entry(p, struct audioformat, list);
1880 runtime->hw.rates |= fp->rates;
1881 if (runtime->hw.rate_min > fp->rate_min)
1882 runtime->hw.rate_min = fp->rate_min;
1883 if (runtime->hw.rate_max < fp->rate_max)
1884 runtime->hw.rate_max = fp->rate_max;
1885 if (runtime->hw.channels_min > fp->channels)
1886 runtime->hw.channels_min = fp->channels;
1887 if (runtime->hw.channels_max < fp->channels)
1888 runtime->hw.channels_max = fp->channels;
1889 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1890 /* FIXME: there might be more than one audio formats... */
1891 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1892 fp->frame_size;
1893 }
a7d9c099
CL		 1894 pt = 125 * (1 << fp->datainterval);
1895 ptmin = min(ptmin, pt);
1da177e4
LT		 1896 }
1897
a7d9c099
CL		 1898 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
1899 if (snd_usb_get_speed(subs->dev) != USB_SPEED_HIGH)
1900 /* full speed devices have fixed data packet interval */
1901 ptmin = 1000;
1902 if (ptmin == 1000)
1903 /* if period time doesn't go below 1 ms, no rules needed */
1904 param_period_time_if_needed = -1;
1da177e4 1905 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
a7d9c099 1906 ptmin, UINT_MAX);
1da177e4 1907
4608eb08
CL		 1908 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1909 hw_rule_rate, subs,
1910 SNDRV_PCM_HW_PARAM_FORMAT,
1911 SNDRV_PCM_HW_PARAM_CHANNELS,
a7d9c099 1912 param_period_time_if_needed,
4608eb08
CL		 1913 -1)) < 0)
1914 return err;
1915 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1916 hw_rule_channels, subs,
1917 SNDRV_PCM_HW_PARAM_FORMAT,
1918 SNDRV_PCM_HW_PARAM_RATE,
a7d9c099 1919 param_period_time_if_needed,
4608eb08
CL		 1920 -1)) < 0)
1921 return err;
1922 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1923 hw_rule_format, subs,
1924 SNDRV_PCM_HW_PARAM_RATE,
1925 SNDRV_PCM_HW_PARAM_CHANNELS,
a7d9c099 1926 param_period_time_if_needed,
4608eb08
CL		 1927 -1)) < 0)
1928 return err;
a7d9c099
CL		 1929 if (param_period_time_if_needed >= 0) {
1930 err = snd_pcm_hw_rule_add(runtime, 0,
1931 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1932 hw_rule_period_time, subs,
1933 SNDRV_PCM_HW_PARAM_FORMAT,
1934 SNDRV_PCM_HW_PARAM_CHANNELS,
1935 SNDRV_PCM_HW_PARAM_RATE,
1936 -1);
1937 if (err < 0)
1938 return err;
1939 }
4608eb08 1940 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
5a220c86 1941 return err;
1da177e4
LT		 1942 return 0;
1943}
1944
1700f308 1945static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1da177e4 1946{
86e07d34
TI		 1947 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1948 struct snd_pcm_runtime *runtime = substream->runtime;
1949 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1950
1951 subs->interface = -1;
1952 subs->format = 0;
1700f308 1953 runtime->hw = snd_usb_hardware;
1da177e4
LT		 1954 runtime->private_data = subs;
1955 subs->pcm_substream = substream;
1956 return setup_hw_info(runtime, subs);
1957}
1958
86e07d34 1959static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1da177e4 1960{
86e07d34
TI		 1961 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1962 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4 1963
78b8d5d2 1964 if (!as->chip->shutdown && subs->interface >= 0) {
1da177e4
LT		 1965 usb_set_interface(subs->dev, subs->interface, 0);
1966 subs->interface = -1;
1967 }
1968 subs->pcm_substream = NULL;
1969 return 0;
1970}
1971
86e07d34 1972static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1da177e4 1973{
1700f308 1974 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1da177e4
LT		 1975}
1976
86e07d34 1977static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1978{
1979 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1980}
1981
86e07d34 1982static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1da177e4 1983{
1700f308 1984 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1da177e4
LT		 1985}
1986
86e07d34 1987static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1988{
1989 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1990}
1991
86e07d34 1992static struct snd_pcm_ops snd_usb_playback_ops = {
1da177e4
LT		 1993 .open = snd_usb_playback_open,
1994 .close = snd_usb_playback_close,
1995 .ioctl = snd_pcm_lib_ioctl,
1996 .hw_params = snd_usb_hw_params,
1997 .hw_free = snd_usb_hw_free,
1998 .prepare = snd_usb_pcm_prepare,
b55bbf06 1999 .trigger = snd_usb_pcm_playback_trigger,
1da177e4 2000 .pointer = snd_usb_pcm_pointer,
c55675e3 2001 .page = snd_pcm_lib_get_vmalloc_page,
c32d977b 2002 .mmap = snd_pcm_lib_mmap_vmalloc,
1da177e4
LT		 2003};
2004
86e07d34 2005static struct snd_pcm_ops snd_usb_capture_ops = {
1da177e4
LT		 2006 .open = snd_usb_capture_open,
2007 .close = snd_usb_capture_close,
2008 .ioctl = snd_pcm_lib_ioctl,
2009 .hw_params = snd_usb_hw_params,
2010 .hw_free = snd_usb_hw_free,
2011 .prepare = snd_usb_pcm_prepare,
b55bbf06 2012 .trigger = snd_usb_pcm_capture_trigger,
1da177e4 2013 .pointer = snd_usb_pcm_pointer,
c55675e3 2014 .page = snd_pcm_lib_get_vmalloc_page,
c32d977b 2015 .mmap = snd_pcm_lib_mmap_vmalloc,
1da177e4
LT		 2016};
2017
2018
2019
2020/*
2021 * helper functions
2022 */
2023
2024/*
2025 * combine bytes and get an integer value
2026 */
2027unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
2028{
2029 switch (size) {
2030 case 1: return *bytes;
2031 case 2: return combine_word(bytes);
2032 case 3: return combine_triple(bytes);
2033 case 4: return combine_quad(bytes);
2034 default: return 0;
2035 }
2036}
2037
2038/*
2039 * parse descriptor buffer and return the pointer starting the given
2040 * descriptor type.
2041 */
2042void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
2043{
2044 u8 *p, *end, *next;
2045
2046 p = descstart;
2047 end = p + desclen;
2048 for (; p < end;) {
2049 if (p[0] < 2)
2050 return NULL;
2051 next = p + p[0];
2052 if (next > end)
2053 return NULL;
2054 if (p[1] == dtype && (!after || (void *)p > after)) {
2055 return p;
2056 }
2057 p = next;
2058 }
2059 return NULL;
2060}
2061
2062/*
2063 * find a class-specified interface descriptor with the given subtype.
2064 */
2065void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
2066{
2067 unsigned char *p = after;
2068
2069 while ((p = snd_usb_find_desc(buffer, buflen, p,
2070 USB_DT_CS_INTERFACE)) != NULL) {
2071 if (p[0] >= 3 && p[2] == dsubtype)
2072 return p;
2073 }
2074 return NULL;
2075}
2076
2077/*
2078 * Wrapper for usb_control_msg().
2079 * Allocates a temp buffer to prevent dmaing from/to the stack.
2080 */
2081int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
2082 __u8 requesttype, __u16 value, __u16 index, void *data,
2083 __u16 size, int timeout)
2084{
2085 int err;
2086 void *buf = NULL;
2087
2088 if (size > 0) {
52978be6 2089 buf = kmemdup(data, size, GFP_KERNEL);
1da177e4
LT		 2090 if (!buf)
2091 return -ENOMEM;
1da177e4
LT		 2092 }
2093 err = usb_control_msg(dev, pipe, request, requesttype,
2094 value, index, buf, size, timeout);
2095 if (size > 0) {
2096 memcpy(data, buf, size);
2097 kfree(buf);
2098 }
2099 return err;
2100}
2101
2102
2103/*
2104 * entry point for linux usb interface
2105 */
2106
2107static int usb_audio_probe(struct usb_interface *intf,
2108 const struct usb_device_id *id);
2109static void usb_audio_disconnect(struct usb_interface *intf);
93521d27
AM		 2110
2111#ifdef CONFIG_PM
f85bf29c
ON		 2112static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message);
2113static int usb_audio_resume(struct usb_interface *intf);
93521d27
AM		 2114#else
2115#define usb_audio_suspend NULL
2116#define usb_audio_resume NULL
2117#endif
1da177e4
LT		 2118
2119static struct usb_device_id usb_audio_ids [] = {
2120#include "usbquirks.h"
2121 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2122 .bInterfaceClass = USB_CLASS_AUDIO,
2123 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
2124 { } /* Terminating entry */
2125};
2126
2127MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2128
2129static struct usb_driver usb_audio_driver = {
1da177e4
LT		 2130 .name = "snd-usb-audio",
2131 .probe = usb_audio_probe,
2132 .disconnect = usb_audio_disconnect,
f85bf29c
ON		 2133 .suspend = usb_audio_suspend,
2134 .resume = usb_audio_resume,
1da177e4
LT		 2135 .id_table = usb_audio_ids,
2136};
2137
2138
727f317a 2139#if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
21a3479a 2140
1da177e4
LT		 2141/*
2142 * proc interface for list the supported pcm formats
2143 */
86e07d34 2144static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2145{
2146 struct list_head *p;
2147 static char *sync_types[4] = {
2148 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2149 };
2150
2151 list_for_each(p, &subs->fmt_list) {
2152 struct audioformat *fp;
2153 fp = list_entry(p, struct audioformat, list);
2154 snd_iprintf(buffer, " Interface %d\n", fp->iface);
2155 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
6e5265ec
TI		 2156 snd_iprintf(buffer, " Format: %s\n",
2157 snd_pcm_format_name(fp->format));
1da177e4
LT		 2158 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
2159 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
2160 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2161 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2162 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2163 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2164 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2165 fp->rate_min, fp->rate_max);
2166 } else {
2167 unsigned int i;
2168 snd_iprintf(buffer, " Rates: ");
2169 for (i = 0; i < fp->nr_rates; i++) {
2170 if (i > 0)
2171 snd_iprintf(buffer, ", ");
2172 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2173 }
2174 snd_iprintf(buffer, "\n");
2175 }
744b89e5
CL		 2176 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
2177 snd_iprintf(buffer, " Data packet interval: %d us\n",
2178 125 * (1 << fp->datainterval));
1da177e4 2179 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
b9d710b3 2180 // snd_iprintf(buffer, " EP Attribute = %#x\n", fp->attributes);
1da177e4
LT		 2181 }
2182}
2183
86e07d34 2184static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2185{
2186 if (subs->running) {
2187 unsigned int i;
2188 snd_iprintf(buffer, " Status: Running\n");
2189 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2190 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2191 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2192 for (i = 0; i < subs->nurbs; i++)
2193 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2194 snd_iprintf(buffer, "]\n");
2195 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2196 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2197 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2198 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2199 : get_high_speed_hz(subs->freqm),
2200 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2201 } else {
2202 snd_iprintf(buffer, " Status: Stop\n");
2203 }
2204}
2205
86e07d34 2206static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 2207{
86e07d34 2208 struct snd_usb_stream *stream = entry->private_data;
1da177e4
LT		 2209
2210 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2211
2212 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2213 snd_iprintf(buffer, "\nPlayback:\n");
2214 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2215 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2216 }
2217 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2218 snd_iprintf(buffer, "\nCapture:\n");
2219 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2220 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2221 }
2222}
2223
86e07d34 2224static void proc_pcm_format_add(struct snd_usb_stream *stream)
1da177e4 2225{
86e07d34 2226 struct snd_info_entry *entry;
1da177e4 2227 char name[32];
86e07d34 2228 struct snd_card *card = stream->chip->card;
1da177e4
LT		 2229
2230 sprintf(name, "stream%d", stream->pcm_index);
07f51a72 2231 if (!snd_card_proc_new(card, name, &entry))
bf850204 2232 snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
1da177e4
LT		 2233}
2234
21a3479a
JK		 2235#else
2236
2237static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
2238{
2239}
2240
2241#endif
1da177e4
LT		 2242
2243/*
2244 * initialize the substream instance.
2245 */
2246
86e07d34 2247static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
1da177e4 2248{
86e07d34 2249 struct snd_usb_substream *subs = &as->substream[stream];
1da177e4
LT		 2250
2251 INIT_LIST_HEAD(&subs->fmt_list);
2252 spin_lock_init(&subs->lock);
2253
2254 subs->stream = as;
2255 subs->direction = stream;
2256 subs->dev = as->chip->dev;
98e89f60 2257 subs->txfr_quirk = as->chip->txfr_quirk;
d513202e 2258 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) {
1da177e4 2259 subs->ops = audio_urb_ops[stream];
d513202e 2260 } else {
1da177e4 2261 subs->ops = audio_urb_ops_high_speed[stream];
d513202e
CL		 2262 switch (as->chip->usb_id) {
2263 case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
2264 case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
97c889a7 2265 case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
d513202e
CL		 2266 subs->ops.retire_sync = retire_playback_sync_urb_hs_emu;
2267 break;
2268 }
2269 }
1da177e4
LT		 2270 snd_pcm_set_ops(as->pcm, stream,
2271 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2272 &snd_usb_playback_ops : &snd_usb_capture_ops);
2273
2274 list_add_tail(&fp->list, &subs->fmt_list);
2275 subs->formats |= 1ULL << fp->format;
2276 subs->endpoint = fp->endpoint;
2277 subs->num_formats++;
2278 subs->fmt_type = fp->fmt_type;
2279}
2280
2281
2282/*
2283 * free a substream
2284 */
86e07d34 2285static void free_substream(struct snd_usb_substream *subs)
1da177e4
LT		 2286{
2287 struct list_head *p, *n;
2288
07f51a72 2289 if (!subs->num_formats)
1da177e4
LT		 2290 return; /* not initialized */
2291 list_for_each_safe(p, n, &subs->fmt_list) {
2292 struct audioformat *fp = list_entry(p, struct audioformat, list);
2293 kfree(fp->rate_table);
2294 kfree(fp);
2295 }
8fec560d 2296 kfree(subs->rate_list.list);
1da177e4
LT		 2297}
2298
2299
2300/*
2301 * free a usb stream instance
2302 */
86e07d34 2303static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
1da177e4
LT		 2304{
2305 free_substream(&stream->substream[0]);
2306 free_substream(&stream->substream[1]);
2307 list_del(&stream->list);
2308 kfree(stream);
2309}
2310
86e07d34 2311static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
1da177e4 2312{
86e07d34 2313 struct snd_usb_stream *stream = pcm->private_data;
1da177e4
LT		 2314 if (stream) {
2315 stream->pcm = NULL;
1da177e4
LT		 2316 snd_usb_audio_stream_free(stream);
2317 }
2318}
2319
2320
2321/*
2322 * add this endpoint to the chip instance.
2323 * if a stream with the same endpoint already exists, append to it.
2324 * if not, create a new pcm stream.
2325 */
86e07d34 2326static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
1da177e4
LT		 2327{
2328 struct list_head *p;
86e07d34
TI		 2329 struct snd_usb_stream *as;
2330 struct snd_usb_substream *subs;
2331 struct snd_pcm *pcm;
1da177e4
LT		 2332 int err;
2333
2334 list_for_each(p, &chip->pcm_list) {
86e07d34 2335 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2336 if (as->fmt_type != fp->fmt_type)
2337 continue;
2338 subs = &as->substream[stream];
07f51a72 2339 if (!subs->endpoint)
1da177e4
LT		 2340 continue;
2341 if (subs->endpoint == fp->endpoint) {
2342 list_add_tail(&fp->list, &subs->fmt_list);
2343 subs->num_formats++;
2344 subs->formats |= 1ULL << fp->format;
2345 return 0;
2346 }
2347 }
2348 /* look for an empty stream */
2349 list_for_each(p, &chip->pcm_list) {
86e07d34 2350 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2351 if (as->fmt_type != fp->fmt_type)
2352 continue;
2353 subs = &as->substream[stream];
2354 if (subs->endpoint)
2355 continue;
2356 err = snd_pcm_new_stream(as->pcm, stream, 1);
2357 if (err < 0)
2358 return err;
2359 init_substream(as, stream, fp);
2360 return 0;
2361 }
2362
2363 /* create a new pcm */
59feddb2 2364 as = kzalloc(sizeof(*as), GFP_KERNEL);
07f51a72 2365 if (!as)
1da177e4 2366 return -ENOMEM;
1da177e4
LT		 2367 as->pcm_index = chip->pcm_devs;
2368 as->chip = chip;
2369 as->fmt_type = fp->fmt_type;
2370 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2371 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2372 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2373 &pcm);
2374 if (err < 0) {
2375 kfree(as);
2376 return err;
2377 }
2378 as->pcm = pcm;
2379 pcm->private_data = as;
2380 pcm->private_free = snd_usb_audio_pcm_free;
2381 pcm->info_flags = 0;
2382 if (chip->pcm_devs > 0)
2383 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2384 else
2385 strcpy(pcm->name, "USB Audio");
2386
2387 init_substream(as, stream, fp);
2388
2389 list_add(&as->list, &chip->pcm_list);
2390 chip->pcm_devs++;
2391
2392 proc_pcm_format_add(as);
2393
2394 return 0;
2395}
2396
2397
2398/*
2399 * check if the device uses big-endian samples
2400 */
86e07d34 2401static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1da177e4 2402{
27d10f56
CL		 2403 switch (chip->usb_id) {
2404 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2405 if (fp->endpoint & USB_DIR_IN)
1da177e4 2406 return 1;
27d10f56
CL		 2407 break;
2408 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
f8c78b82
TLM		 2409 if (device_setup[chip->index] == 0x00 ||
2410 fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
2411 return 1;
1da177e4
LT		 2412 }
2413 return 0;
2414}
2415
2416/*
2417 * parse the audio format type I descriptor
2418 * and returns the corresponding pcm format
2419 *
2420 * @dev: usb device
2421 * @fp: audioformat record
2422 * @format: the format tag (wFormatTag)
2423 * @fmt: the format type descriptor
2424 */
86e07d34 2425static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
28e1b773 2426 int format, void *fmt_raw)
1da177e4
LT		 2427{
2428 int pcm_format;
2429 int sample_width, sample_bytes;
28e1b773 2430 struct uac_format_type_i_discrete_descriptor *fmt = fmt_raw;
1da177e4
LT		 2431
2432 /* FIXME: correct endianess and sign? */
2433 pcm_format = -1;
28e1b773
DM		 2434 sample_width = fmt->bBitResolution;
2435 sample_bytes = fmt->bSubframeSize;
2436
1da177e4
LT		 2437 switch (format) {
2438 case 0: /* some devices don't define this correctly... */
2439 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2440 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2441 /* fall-through */
2442 case USB_AUDIO_FORMAT_PCM:
2443 if (sample_width > sample_bytes * 8) {
2444 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2445 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2446 sample_width, sample_bytes);
2447 }
2448 /* check the format byte size */
28e1b773 2449 switch (sample_bytes) {
1da177e4
LT		 2450 case 1:
2451 pcm_format = SNDRV_PCM_FORMAT_S8;
2452 break;
2453 case 2:
27d10f56 2454 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2455 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2456 else
2457 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2458 break;
2459 case 3:
27d10f56 2460 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2461 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2462 else
2463 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2464 break;
2465 case 4:
2466 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2467 break;
2468 default:
2469 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
28e1b773
DM		 2470 chip->dev->devnum, fp->iface, fp->altsetting,
2471 sample_width, sample_bytes);
1da177e4
LT		 2472 break;
2473 }
2474 break;
2475 case USB_AUDIO_FORMAT_PCM8:
2a56f51b
PM		 2476 pcm_format = SNDRV_PCM_FORMAT_U8;
2477
2478 /* Dallas DS4201 workaround: it advertises U8 format, but really
2479 supports S8. */
27d10f56 2480 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4 2481 pcm_format = SNDRV_PCM_FORMAT_S8;
1da177e4
LT		 2482 break;
2483 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2484 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2485 break;
2486 case USB_AUDIO_FORMAT_ALAW:
2487 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2488 break;
2489 case USB_AUDIO_FORMAT_MU_LAW:
2490 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2491 break;
2492 default:
2493 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2494 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2495 break;
2496 }
2497 return pcm_format;
2498}
2499
2500
2501/*
2502 * parse the format descriptor and stores the possible sample rates
2503 * on the audioformat table.
2504 *
2505 * @dev: usb device
2506 * @fp: audioformat record
2507 * @fmt: the format descriptor
2508 * @offset: the start offset of descriptor pointing the rate type
2509 * (7 for type I and II, 8 for type II)
2510 */
86e07d34 2511static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2512 unsigned char *fmt, int offset)
2513{
2514 int nr_rates = fmt[offset];
918f3a0e 2515
1da177e4
LT		 2516 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2517 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2518 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2519 return -1;
2520 }
2521
2522 if (nr_rates) {
2523 /*
2524 * build the rate table and bitmap flags
2525 */
918f3a0e 2526 int r, idx;
918f3a0e 2527
1da177e4
LT		 2528 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2529 if (fp->rate_table == NULL) {
2530 snd_printk(KERN_ERR "cannot malloc\n");
2531 return -1;
2532 }
2533
0412558c
TI		 2534 fp->nr_rates = 0;
2535 fp->rate_min = fp->rate_max = 0;
1da177e4 2536 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
987411b7 2537 unsigned int rate = combine_triple(&fmt[idx]);
0412558c
TI		 2538 if (!rate)
2539 continue;
987411b7
CL		 2540 /* C-Media CM6501 mislabels its 96 kHz altsetting */
2541 if (rate == 48000 && nr_rates == 1 &&
3b03cc5b
JR		 2542 (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
2543 chip->usb_id == USB_ID(0x0d8c, 0x0102)) &&
987411b7
CL		 2544 fp->altsetting == 5 && fp->maxpacksize == 392)
2545 rate = 96000;
0412558c
TI		 2546 fp->rate_table[fp->nr_rates] = rate;
2547 if (!fp->rate_min || rate < fp->rate_min)
1da177e4 2548 fp->rate_min = rate;
0412558c 2549 if (!fp->rate_max || rate > fp->rate_max)
1da177e4 2550 fp->rate_max = rate;
918f3a0e 2551 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
0412558c 2552 fp->nr_rates++;
1da177e4 2553 }
0412558c 2554 if (!fp->nr_rates) {
beb60119
GJ		 2555 hwc_debug("All rates were zero. Skipping format!\n");
2556 return -1;
2557 }
1da177e4
LT		 2558 } else {
2559 /* continuous rates */
2560 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2561 fp->rate_min = combine_triple(&fmt[offset + 1]);
2562 fp->rate_max = combine_triple(&fmt[offset + 4]);
2563 }
2564 return 0;
2565}
2566
2567/*
2568 * parse the format type I and III descriptors
2569 */
86e07d34 2570static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
28e1b773 2571 int format, void *fmt_raw)
1da177e4
LT		 2572{
2573 int pcm_format;
28e1b773 2574 struct uac_format_type_i_discrete_descriptor *fmt = fmt_raw;
1da177e4 2575
28e1b773 2576 if (fmt->bFormatType == USB_FORMAT_TYPE_III) {
1da177e4
LT		 2577 /* FIXME: the format type is really IECxxx
2578 * but we give normal PCM format to get the existing
2579 * apps working...
2580 */
cac19c3b
TLM		 2581 switch (chip->usb_id) {
2582
2583 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2584 if (device_setup[chip->index] == 0x00 &&
2585 fp->altsetting == 6)
2586 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
2587 else
2588 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2589 break;
2590 default:
2591 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2592 }
1da177e4 2593 } else {
27d10f56 2594 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2595 if (pcm_format < 0)
2596 return -1;
2597 }
28e1b773 2598
1da177e4 2599 fp->format = pcm_format;
28e1b773
DM		 2600 fp->channels = fmt->bNrChannels;
2601
1da177e4
LT		 2602 if (fp->channels < 1) {
2603 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2604 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2605 return -1;
2606 }
28e1b773 2607 return parse_audio_format_rates(chip, fp, fmt_raw, 7);
1da177e4
LT		 2608}
2609
2610/*
28e1b773 2611 * parse the format type II descriptor
1da177e4 2612 */
86e07d34 2613static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
28e1b773 2614 int format, void *fmt_raw)
1da177e4
LT		 2615{
2616 int brate, framesize;
28e1b773
DM		 2617 struct uac_format_type_ii_discrete_descriptor *fmt = fmt_raw;
2618
1da177e4
LT		 2619 switch (format) {
2620 case USB_AUDIO_FORMAT_AC3:
2621 /* FIXME: there is no AC3 format defined yet */
2622 // fp->format = SNDRV_PCM_FORMAT_AC3;
2623 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2624 break;
2625 case USB_AUDIO_FORMAT_MPEG:
2626 fp->format = SNDRV_PCM_FORMAT_MPEG;
2627 break;
2628 default:
b9d710b3 2629 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag %#x is detected. processed as MPEG.\n",
27d10f56 2630 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2631 fp->format = SNDRV_PCM_FORMAT_MPEG;
2632 break;
2633 }
28e1b773 2634
1da177e4 2635 fp->channels = 1;
28e1b773
DM		 2636
2637 brate = le16_to_cpu(fmt->wMaxBitRate);
2638 framesize = le16_to_cpu(fmt->wSamplesPerFrame);
1da177e4
LT		 2639 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2640 fp->frame_size = framesize;
28e1b773 2641 return parse_audio_format_rates(chip, fp, fmt_raw, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2642}
2643
86e07d34 2644static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
28e1b773 2645 int format, void *fmt_raw, int stream)
1da177e4
LT		 2646{
2647 int err;
28e1b773
DM		 2648 /* we only parse the common header of all format types here,
2649 * so it is safe to take a type_i struct */
2650 struct uac_format_type_i_discrete_descriptor *fmt = fmt_raw;
1da177e4 2651
28e1b773 2652 switch (fmt->bFormatType) {
1da177e4
LT		 2653 case USB_FORMAT_TYPE_I:
2654 case USB_FORMAT_TYPE_III:
27d10f56 2655 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2656 break;
2657 case USB_FORMAT_TYPE_II:
27d10f56 2658 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2659 break;
2660 default:
2661 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
28e1b773 2662 chip->dev->devnum, fp->iface, fp->altsetting, fmt->bFormatType);
1da177e4
LT		 2663 return -1;
2664 }
28e1b773 2665 fp->fmt_type = fmt->bFormatType;
1da177e4
LT		 2666 if (err < 0)
2667 return err;
2668#if 1
33159378 2669 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
1da177e4
LT		 2670 /* extigy apparently supports sample rates other than 48k
2671 * but not in ordinary way. so we enable only 48k atm.
2672 */
27d10f56 2673 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
33159378
CL		 2674 chip->usb_id == USB_ID(0x041e, 0x3020) ||
2675 chip->usb_id == USB_ID(0x041e, 0x3061)) {
28e1b773 2676 if (fmt->bFormatType == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2677 fp->rates != SNDRV_PCM_RATE_48000 &&
2678 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2679 return -1;
1da177e4
LT		 2680 }
2681#endif
2682 return 0;
2683}
2684
744b89e5
CL		 2685static unsigned char parse_datainterval(struct snd_usb_audio *chip,
2686 struct usb_host_interface *alts)
2687{
2688 if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH &&
2689 get_endpoint(alts, 0)->bInterval >= 1 &&
2690 get_endpoint(alts, 0)->bInterval <= 4)
2691 return get_endpoint(alts, 0)->bInterval - 1;
2692 else
2693 return 0;
2694}
2695
e311334e
TLM		 2696static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
2697 int iface, int altno);
86e07d34 2698static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
1da177e4
LT		 2699{
2700 struct usb_device *dev;
2701 struct usb_interface *iface;
2702 struct usb_host_interface *alts;
2703 struct usb_interface_descriptor *altsd;
2704 int i, altno, err, stream;
2705 int format;
8886f33f 2706 struct audioformat *fp = NULL;
1da177e4 2707 unsigned char *fmt, *csep;
b9d43bcd 2708 int num;
1da177e4
LT		 2709
2710 dev = chip->dev;
2711
2712 /* parse the interface's altsettings */
2713 iface = usb_ifnum_to_if(dev, iface_no);
b9d43bcd
PM		 2714
2715 num = iface->num_altsetting;
2716
2717 /*
2718 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
2719 * one misses syncpipe, and does not produce any sound.
2720 */
2721 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
2722 num = 4;
2723
2724 for (i = 0; i < num; i++) {
28e1b773
DM		 2725 struct uac_as_header_descriptor_v1 *as;
2726
1da177e4
LT		 2727 alts = &iface->altsetting[i];
2728 altsd = get_iface_desc(alts);
2729 /* skip invalid one */
2730 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2731 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2732 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2733 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2734 altsd->bNumEndpoints < 1 ||
2735 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2736 continue;
2737 /* must be isochronous */
2738 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2739 USB_ENDPOINT_XFER_ISOC)
2740 continue;
2741 /* check direction */
2742 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2743 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2744 altno = altsd->bAlternateSetting;
28e1b773 2745
e311334e
TLM		 2746 /* audiophile usb: skip altsets incompatible with device_setup
2747 */
2748 if (chip->usb_id == USB_ID(0x0763, 0x2003) &&
2749 audiophile_skip_setting_quirk(chip, iface_no, altno))
2750 continue;
1da177e4
LT		 2751
2752 /* get audio formats */
28e1b773
DM		 2753 as = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2754
2755 if (!as) {
1da177e4
LT		 2756 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2757 dev->devnum, iface_no, altno);
2758 continue;
2759 }
2760
28e1b773 2761 if (as->bLength < sizeof(*as)) {
1da177e4
LT		 2762 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2763 dev->devnum, iface_no, altno);
2764 continue;
2765 }
2766
28e1b773 2767 format = le16_to_cpu(as->wFormatTag); /* remember the format value */
1da177e4
LT		 2768
2769 /* get format type */
2770 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2771 if (!fmt) {
2772 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2773 dev->devnum, iface_no, altno);
2774 continue;
2775 }
2776 if (fmt[0] < 8) {
2777 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2778 dev->devnum, iface_no, altno);
2779 continue;
2780 }
2781
8886f33f
CL		 2782 /*
2783 * Blue Microphones workaround: The last altsetting is identical
2784 * with the previous one, except for a larger packet size, but
2785 * is actually a mislabeled two-channel setting; ignore it.
2786 */
2787 if (fmt[4] == 1 && fmt[5] == 2 && altno == 2 && num == 3 &&
2788 fp && fp->altsetting == 1 && fp->channels == 1 &&
2789 fp->format == SNDRV_PCM_FORMAT_S16_LE &&
2790 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
2791 fp->maxpacksize * 2)
2792 continue;
2793
1da177e4
LT		 2794 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2795 /* Creamware Noah has this descriptor after the 2nd endpoint */
2796 if (!csep && altsd->bNumEndpoints >= 2)
2797 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2798 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
f8c75790 2799 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
faf8d117 2800 " class specific endpoint descriptor\n",
1da177e4 2801 dev->devnum, iface_no, altno);
faf8d117 2802 csep = NULL;
1da177e4
LT		 2803 }
2804
59feddb2 2805 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 2806 if (! fp) {
2807 snd_printk(KERN_ERR "cannot malloc\n");
2808 return -ENOMEM;
2809 }
2810
1da177e4
LT		 2811 fp->iface = iface_no;
2812 fp->altsetting = altno;
2813 fp->altset_idx = i;
2814 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2815 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
744b89e5 2816 fp->datainterval = parse_datainterval(chip, alts);
1da177e4 2817 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2818 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2819 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2820 * (fp->maxpacksize & 0x7ff);
faf8d117 2821 fp->attributes = csep ? csep[3] : 0;
1da177e4
LT		 2822
2823 /* some quirks for attributes here */
2824
c3f93297
CL		 2825 switch (chip->usb_id) {
2826 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2827 /* Optoplay sets the sample rate attribute although
2828 * it seems not supporting it in fact.
2829 */
2830 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2831 break;
2832 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2833 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2834 /* doesn't set the sample rate attribute, but supports it */
2835 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2836 break;
2837 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2838 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2839 an older model 77d:223) */
1da177e4
LT		 2840 /*
2841 * plantronics headset and Griffin iMic have set adaptive-in
2842 * although it's really not...
2843 */
1da177e4
LT		 2844 fp->ep_attr &= ~EP_ATTR_MASK;
2845 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2846 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2847 else
2848 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2849 break;
1da177e4
LT		 2850 }
2851
2852 /* ok, let's parse further... */
27d10f56 2853 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2854 kfree(fp->rate_table);
2855 kfree(fp);
2856 continue;
2857 }
2858
b9d710b3 2859 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
1da177e4
LT		 2860 err = add_audio_endpoint(chip, stream, fp);
2861 if (err < 0) {
2862 kfree(fp->rate_table);
2863 kfree(fp);
2864 return err;
2865 }
2866 /* try to set the interface... */
2867 usb_set_interface(chip->dev, iface_no, altno);
2868 init_usb_pitch(chip->dev, iface_no, alts, fp);
2869 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2870 }
2871 return 0;
2872}
2873
2874
2875/*
2876 * disconnect streams
2877 * called from snd_usb_audio_disconnect()
2878 */
ee733397 2879static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2880{
2881 int idx;
86e07d34
TI		 2882 struct snd_usb_stream *as;
2883 struct snd_usb_substream *subs;
1da177e4 2884
86e07d34 2885 as = list_entry(head, struct snd_usb_stream, list);
1da177e4
LT		 2886 for (idx = 0; idx < 2; idx++) {
2887 subs = &as->substream[idx];
2888 if (!subs->num_formats)
2889 return;
2890 release_substream_urbs(subs, 1);
2891 subs->interface = -1;
2892 }
2893}
2894
28e1b773
DM		 2895static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
2896{
2897 struct usb_device *dev = chip->dev;
2898 struct usb_host_interface *alts;
2899 struct usb_interface_descriptor *altsd;
2900 struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
2901
2902 if (!iface) {
2903 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2904 dev->devnum, ctrlif, interface);
2905 return -EINVAL;
2906 }
2907
2908 if (usb_interface_claimed(iface)) {
2909 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n",
2910 dev->devnum, ctrlif, interface);
2911 return -EINVAL;
2912 }
2913
2914 alts = &iface->altsetting[0];
2915 altsd = get_iface_desc(alts);
2916 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2917 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2918 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2919 int err = snd_usbmidi_create(chip->card, iface,
2920 &chip->midi_list, NULL);
2921 if (err < 0) {
2922 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n",
2923 dev->devnum, ctrlif, interface);
2924 return -EINVAL;
2925 }
2926 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2927
2928 return 0;
2929 }
2930
2931 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2932 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2933 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2934 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n",
2935 dev->devnum, ctrlif, interface, altsd->bInterfaceClass);
2936 /* skip non-supported classes */
2937 return -EINVAL;
2938 }
2939
2940 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
2941 snd_printk(KERN_ERR "low speed audio streaming not supported\n");
2942 return -EINVAL;
2943 }
2944
2945 if (! parse_audio_endpoints(chip, interface)) {
2946 usb_set_interface(dev, interface, 0); /* reset the current interface */
2947 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2948 return -EINVAL;
2949 }
2950
2951 return 0;
2952}
2953
1da177e4
LT		 2954/*
2955 * parse audio control descriptor and create pcm/midi streams
2956 */
86e07d34 2957static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
1da177e4
LT		 2958{
2959 struct usb_device *dev = chip->dev;
2960 struct usb_host_interface *host_iface;
28e1b773
DM		 2961 struct uac_ac_header_descriptor_v1 *h1;
2962 void *control_header;
2963 int i;
1da177e4
LT		 2964
2965 /* find audiocontrol interface */
2966 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
28e1b773
DM		 2967 control_header = snd_usb_find_csint_desc(host_iface->extra,
2968 host_iface->extralen,
2969 NULL, HEADER);
2970
2971 if (!control_header) {
1da177e4
LT		 2972 snd_printk(KERN_ERR "cannot find HEADER\n");
2973 return -EINVAL;
2974 }
28e1b773
DM		 2975
2976 h1 = control_header;
2977
2978 if (!h1->bInCollection) {
2979 snd_printk(KERN_INFO "skipping empty audio interface (v1)\n");
1da177e4
LT		 2980 return -EINVAL;
2981 }
2982
28e1b773
DM		 2983 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
2984 snd_printk(KERN_ERR "invalid HEADER (v1)\n");
2985 return -EINVAL;
1da177e4
LT		 2986 }
2987
28e1b773
DM		 2988 for (i = 0; i < h1->bInCollection; i++)
2989 snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
2990
1da177e4
LT		 2991 return 0;
2992}
2993
2994/*
2995 * create a stream for an endpoint/altsetting without proper descriptors
2996 */
86e07d34 2997static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
1da177e4 2998 struct usb_interface *iface,
86e07d34 2999 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3000{
3001 struct audioformat *fp;
3002 struct usb_host_interface *alts;
3003 int stream, err;
b4482a4b 3004 unsigned *rate_table = NULL;
1da177e4 3005
52978be6 3006 fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
1da177e4 3007 if (! fp) {
52978be6 3008 snd_printk(KERN_ERR "cannot memdup\n");
1da177e4
LT		 3009 return -ENOMEM;
3010 }
1da177e4
LT		 3011 if (fp->nr_rates > 0) {
3012 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
3013 if (!rate_table) {
3014 kfree(fp);
3015 return -ENOMEM;
3016 }
3017 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
3018 fp->rate_table = rate_table;
3019 }
3020
3021 stream = (fp->endpoint & USB_DIR_IN)
3022 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3023 err = add_audio_endpoint(chip, stream, fp);
3024 if (err < 0) {
3025 kfree(fp);
3026 kfree(rate_table);
3027 return err;
3028 }
3029 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
3030 fp->altset_idx >= iface->num_altsetting) {
3031 kfree(fp);
3032 kfree(rate_table);
3033 return -EINVAL;
3034 }
3035 alts = &iface->altsetting[fp->altset_idx];
744b89e5 3036 fp->datainterval = parse_datainterval(chip, alts);
894dcd78 3037 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
1da177e4
LT		 3038 usb_set_interface(chip->dev, fp->iface, 0);
3039 init_usb_pitch(chip->dev, fp->iface, alts, fp);
3040 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
3041 return 0;
3042}
3043
3044/*
3045 * create a stream for an interface with proper descriptors
3046 */
86e07d34 3047static int create_standard_audio_quirk(struct snd_usb_audio *chip,
d1bda045 3048 struct usb_interface *iface,
86e07d34 3049 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3050{
3051 struct usb_host_interface *alts;
3052 struct usb_interface_descriptor *altsd;
3053 int err;
3054
3055 alts = &iface->altsetting[0];
3056 altsd = get_iface_desc(alts);
d1bda045 3057 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
1da177e4
LT		 3058 if (err < 0) {
3059 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
3060 altsd->bInterfaceNumber, err);
3061 return err;
3062 }
d1bda045
CL		 3063 /* reset the current interface */
3064 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
1da177e4
LT		 3065 return 0;
3066}
3067
3068/*
310e0dc0
PLC		 3069 * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
3070 * The only way to detect the sample rate is by looking at wMaxPacketSize.
1da177e4 3071 */
310e0dc0
PLC		 3072static int create_uaxx_quirk(struct snd_usb_audio *chip,
3073 struct usb_interface *iface,
3074 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3075{
3076 static const struct audioformat ua_format = {
3077 .format = SNDRV_PCM_FORMAT_S24_3LE,
3078 .channels = 2,
3079 .fmt_type = USB_FORMAT_TYPE_I,
3080 .altsetting = 1,
3081 .altset_idx = 1,
3082 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3083 };
3084 struct usb_host_interface *alts;
3085 struct usb_interface_descriptor *altsd;
3086 struct audioformat *fp;
3087 int stream, err;
3088
310e0dc0
PLC		 3089 /* both PCM and MIDI interfaces have 2 or more altsettings */
3090 if (iface->num_altsetting < 2)
1da177e4
LT		 3091 return -ENXIO;
3092 alts = &iface->altsetting[1];
3093 altsd = get_iface_desc(alts);
3094
59b3db6c
PLC		 3095 if (altsd->bNumEndpoints == 2) {
3096 static const struct snd_usb_midi_endpoint_info ua700_ep = {
3097 .out_cables = 0x0003,
3098 .in_cables = 0x0003
3099 };
3100 static const struct snd_usb_audio_quirk ua700_quirk = {
3101 .type = QUIRK_MIDI_FIXED_ENDPOINT,
3102 .data = &ua700_ep
3103 };
3104 static const struct snd_usb_midi_endpoint_info uaxx_ep = {
3105 .out_cables = 0x0001,
3106 .in_cables = 0x0001
3107 };
3108 static const struct snd_usb_audio_quirk uaxx_quirk = {
3109 .type = QUIRK_MIDI_FIXED_ENDPOINT,
3110 .data = &uaxx_ep
3111 };
d82af9f9
CL		 3112 const struct snd_usb_audio_quirk *quirk =
3113 chip->usb_id == USB_ID(0x0582, 0x002b)
3114 ? &ua700_quirk : &uaxx_quirk;
3115 return snd_usbmidi_create(chip->card, iface,
3116 &chip->midi_list, quirk);
59b3db6c
PLC		 3117 }
3118
1da177e4
LT		 3119 if (altsd->bNumEndpoints != 1)
3120 return -ENXIO;
3121
3122 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
3123 if (!fp)
3124 return -ENOMEM;
3125 memcpy(fp, &ua_format, sizeof(*fp));
3126
3127 fp->iface = altsd->bInterfaceNumber;
3128 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3129 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
744b89e5 3130 fp->datainterval = 0;
1da177e4
LT		 3131 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3132
3133 switch (fp->maxpacksize) {
3134 case 0x120:
3135 fp->rate_max = fp->rate_min = 44100;
3136 break;
3137 case 0x138:
3138 case 0x140:
3139 fp->rate_max = fp->rate_min = 48000;
3140 break;
3141 case 0x258:
3142 case 0x260:
3143 fp->rate_max = fp->rate_min = 96000;
3144 break;
3145 default:
3146 snd_printk(KERN_ERR "unknown sample rate\n");
3147 kfree(fp);
3148 return -ENXIO;
3149 }
3150
3151 stream = (fp->endpoint & USB_DIR_IN)
3152 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3153 err = add_audio_endpoint(chip, stream, fp);
3154 if (err < 0) {
3155 kfree(fp);
3156 return err;
3157 }
3158 usb_set_interface(chip->dev, fp->iface, 0);
3159 return 0;
3160}
3161
3162/*
3163 * Create a stream for an Edirol UA-1000 interface.
3164 */
86e07d34 3165static int create_ua1000_quirk(struct snd_usb_audio *chip,
854af957 3166 struct usb_interface *iface,
86e07d34 3167 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3168{
3169 static const struct audioformat ua1000_format = {
3170 .format = SNDRV_PCM_FORMAT_S32_LE,
3171 .fmt_type = USB_FORMAT_TYPE_I,
3172 .altsetting = 1,
3173 .altset_idx = 1,
3174 .attributes = 0,
3175 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3176 };
3177 struct usb_host_interface *alts;
3178 struct usb_interface_descriptor *altsd;
3179 struct audioformat *fp;
3180 int stream, err;
3181
3182 if (iface->num_altsetting != 2)
3183 return -ENXIO;
3184 alts = &iface->altsetting[1];
3185 altsd = get_iface_desc(alts);
c4a87ef4 3186 if (alts->extralen != 11 || alts->extra[1] != USB_DT_CS_INTERFACE ||
1da177e4
LT		 3187 altsd->bNumEndpoints != 1)
3188 return -ENXIO;
3189
52978be6 3190 fp = kmemdup(&ua1000_format, sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 3191 if (!fp)
3192 return -ENOMEM;
1da177e4
LT		 3193
3194 fp->channels = alts->extra[4];
3195 fp->iface = altsd->bInterfaceNumber;
3196 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3197 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
744b89e5 3198 fp->datainterval = parse_datainterval(chip, alts);
1da177e4
LT		 3199 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3200 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
3201
3202 stream = (fp->endpoint & USB_DIR_IN)
3203 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3204 err = add_audio_endpoint(chip, stream, fp);
3205 if (err < 0) {
3206 kfree(fp);
3207 return err;
3208 }
3209 /* FIXME: playback must be synchronized to capture */
3210 usb_set_interface(chip->dev, fp->iface, 0);
3211 return 0;
3212}
3213
86e07d34 3214static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3215 struct usb_interface *iface,
86e07d34 3216 const struct snd_usb_audio_quirk *quirk);
1da177e4
LT		 3217
3218/*
3219 * handle the quirks for the contained interfaces
3220 */
86e07d34 3221static int create_composite_quirk(struct snd_usb_audio *chip,
1da177e4 3222 struct usb_interface *iface,
86e07d34 3223 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3224{
3225 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
3226 int err;
3227
3228 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
3229 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
3230 if (!iface)
3231 continue;
3232 if (quirk->ifnum != probed_ifnum &&
3233 usb_interface_claimed(iface))
3234 continue;
3235 err = snd_usb_create_quirk(chip, iface, quirk);
3236 if (err < 0)
3237 return err;
3238 if (quirk->ifnum != probed_ifnum)
3239 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
3240 }
3241 return 0;
3242}
3243
86e07d34 3244static int ignore_interface_quirk(struct snd_usb_audio *chip,
854af957 3245 struct usb_interface *iface,
86e07d34 3246 const struct snd_usb_audio_quirk *quirk)
854af957
CL		 3247{
3248 return 0;
3249}
3250
52a7a583
JG		 3251/*
3252 * Allow alignment on audio sub-slot (channel samples) rather than
3253 * on audio slots (audio frames)
3254 */
3255static int create_align_transfer_quirk(struct snd_usb_audio *chip,
3256 struct usb_interface *iface,
3257 const struct snd_usb_audio_quirk *quirk)
3258{
3259 chip->txfr_quirk = 1;
3260 return 1; /* Continue with creating streams and mixer */
3261}
3262
1da177e4
LT		 3263
3264/*
3265 * boot quirks
3266 */
3267
3268#define EXTIGY_FIRMWARE_SIZE_OLD 794
3269#define EXTIGY_FIRMWARE_SIZE_NEW 483
3270
3271static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
3272{
3273 struct usb_host_config *config = dev->actconfig;
3274 int err;
3275
3276 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
3277 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
3278 snd_printdd("sending Extigy boot sequence...\n");
3279 /* Send message to force it to reconnect with full interface. */
3280 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3281 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3282 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3283 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3284 &dev->descriptor, sizeof(dev->descriptor));
3285 config = dev->actconfig;
3286 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3287 err = usb_reset_configuration(dev);
3288 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3289 snd_printdd("extigy_boot: new boot length = %d\n",
3290 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3291 return -ENODEV; /* quit this anyway */
3292 }
3293 return 0;
3294}
3295
3a2f0856
CL		 3296static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3297{
3a2f0856
CL		 3298 u8 buf = 1;
3299
3300 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3301 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3302 0, 0, &buf, 1, 1000);
3303 if (buf == 0) {
3304 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3305 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3306 1, 2000, NULL, 0, 1000);
3307 return -ENODEV;
3308 }
3a2f0856
CL		 3309 return 0;
3310}
3311
e217e30c
SR		 3312/*
3313 * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
3314 * documented in the device's data sheet.
3315 */
3316static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
3317{
3318 u8 buf[4];
3319 buf[0] = 0x20;
3320 buf[1] = value & 0xff;
3321 buf[2] = (value >> 8) & 0xff;
3322 buf[3] = reg;
3323 return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
3324 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
3325 0, 0, &buf, 4, 1000);
3326}
3327
3328static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
3329{
3330 /*
3331 * Enable line-out driver mode, set headphone source to front
3332 * channels, enable stereo mic.
3333 */
3334 return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
3335}
3336
92a43793
DA		 3337/*
3338 * C-Media CM6206 is based on CM106 with two additional
3339 * registers that are not documented in the data sheet.
3340 * Values here are chosen based on sniffing USB traffic
3341 * under Windows.
3342 */
3343static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
3344{
3345 int err, reg;
3346 int val[] = {0x200c, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
3347
3348 for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
3349 err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
3350 if (err < 0)
3351 return err;
3352 }
3353
3354 return err;
3355}
e217e30c 3356
d39e82db
SA		 3357/*
3358 * This call will put the synth in "USB send" mode, i.e it will send MIDI
3359 * messages through USB (this is disabled at startup). The synth will
3360 * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
3361 * sign on its LCD. Values here are chosen based on sniffing USB traffic
3362 * under Windows.
3363 */
3364static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
3365{
3366 int err, actual_length;
3367
3368 /* "midi send" enable */
3369 static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
3370
3371 void *buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
3372 if (!buf)
3373 return -ENOMEM;
3374 err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
3375 ARRAY_SIZE(seq), &actual_length, 1000);
3376 kfree(buf);
3377 if (err < 0)
3378 return err;
3379
3380 return 0;
3381}
3382
e311334e
TLM		 3383/*
3384 * Setup quirks
3385 */
3386#define AUDIOPHILE_SET 0x01 /* if set, parse device_setup */
3387#define AUDIOPHILE_SET_DTS 0x02 /* if set, enable DTS Digital Output */
3388#define AUDIOPHILE_SET_96K 0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
3389#define AUDIOPHILE_SET_24B 0x08 /* 24bits sample if set, 16bits otherwise */
3390#define AUDIOPHILE_SET_DI 0x10 /* if set, enable Digital Input */
3391#define AUDIOPHILE_SET_MASK 0x1F /* bit mask for setup value */
3392#define AUDIOPHILE_SET_24B_48K_DI 0x19 /* value for 24bits+48KHz+Digital Input */
3393#define AUDIOPHILE_SET_24B_48K_NOTDI 0x09 /* value for 24bits+48KHz+No Digital Input */
3394#define AUDIOPHILE_SET_16B_48K_DI 0x11 /* value for 16bits+48KHz+Digital Input */
3395#define AUDIOPHILE_SET_16B_48K_NOTDI 0x01 /* value for 16bits+48KHz+No Digital Input */
3396
3397static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
3398 int iface, int altno)
3399{
f8c78b82
TLM		 3400 /* Reset ALL ifaces to 0 altsetting.
3401 * Call it for every possible altsetting of every interface.
3402 */
3403 usb_set_interface(chip->dev, iface, 0);
3404
e311334e
TLM		 3405 if (device_setup[chip->index] & AUDIOPHILE_SET) {
3406 if ((device_setup[chip->index] & AUDIOPHILE_SET_DTS)
3407 && altno != 6)
3408 return 1; /* skip this altsetting */
3409 if ((device_setup[chip->index] & AUDIOPHILE_SET_96K)
3410 && altno != 1)
3411 return 1; /* skip this altsetting */
3412 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3413 AUDIOPHILE_SET_24B_48K_DI && altno != 2)
3414 return 1; /* skip this altsetting */
3415 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3416 AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
3417 return 1; /* skip this altsetting */
3418 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3419 AUDIOPHILE_SET_16B_48K_DI && altno != 4)
3420 return 1; /* skip this altsetting */
3421 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3422 AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
3423 return 1; /* skip this altsetting */
3424 }
3425 return 0; /* keep this altsetting */
3426}
1da177e4 3427
d82af9f9
CL		 3428static int create_any_midi_quirk(struct snd_usb_audio *chip,
3429 struct usb_interface *intf,
3430 const struct snd_usb_audio_quirk *quirk)
3431{
3432 return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
3433}
3434
1da177e4
LT		 3435/*
3436 * audio-interface quirks
3437 *
3438 * returns zero if no standard audio/MIDI parsing is needed.
3439 * returns a postive value if standard audio/midi interfaces are parsed
3440 * after this.
3441 * returns a negative value at error.
3442 */
86e07d34 3443static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3444 struct usb_interface *iface,
86e07d34 3445 const struct snd_usb_audio_quirk *quirk)
1da177e4 3446{
86e07d34
TI		 3447 typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
3448 const struct snd_usb_audio_quirk *);
854af957
CL		 3449 static const quirk_func_t quirk_funcs[] = {
3450 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3451 [QUIRK_COMPOSITE] = create_composite_quirk,
d82af9f9
CL		 3452 [QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
3453 [QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
3454 [QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
3455 [QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
3456 [QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
3457 [QUIRK_MIDI_FASTLANE] = create_any_midi_quirk,
3458 [QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
3459 [QUIRK_MIDI_CME] = create_any_midi_quirk,
d1bda045 3460 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
854af957 3461 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
854af957 3462 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
52a7a583
JG		 3463 [QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
3464 [QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk
854af957
CL		 3465 };
3466
3467 if (quirk->type < QUIRK_TYPE_COUNT) {
3468 return quirk_funcs[quirk->type](chip, iface, quirk);
3469 } else {
1da177e4
LT		 3470 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3471 return -ENXIO;
3472 }
3473}
3474
3475
3476/*
3477 * common proc files to show the usb device info
3478 */
86e07d34 3479static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3480{
86e07d34 3481 struct snd_usb_audio *chip = entry->private_data;
07f51a72 3482 if (!chip->shutdown)
1da177e4
LT		 3483 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3484}
3485
86e07d34 3486static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3487{
86e07d34 3488 struct snd_usb_audio *chip = entry->private_data;
07f51a72 3489 if (!chip->shutdown)
1da177e4 3490 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3491 USB_ID_VENDOR(chip->usb_id),
3492 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3493}
3494
86e07d34 3495static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
1da177e4 3496{
86e07d34 3497 struct snd_info_entry *entry;
07f51a72 3498 if (!snd_card_proc_new(chip->card, "usbbus", &entry))
bf850204 3499 snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
07f51a72 3500 if (!snd_card_proc_new(chip->card, "usbid", &entry))
bf850204 3501 snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
1da177e4
LT		 3502}
3503
3504/*
3505 * free the chip instance
3506 *
3507 * here we have to do not much, since pcm and controls are already freed
3508 *
3509 */
3510
86e07d34 3511static int snd_usb_audio_free(struct snd_usb_audio *chip)
1da177e4
LT		 3512{
3513 kfree(chip);
3514 return 0;
3515}
3516
86e07d34 3517static int snd_usb_audio_dev_free(struct snd_device *device)
1da177e4 3518{
86e07d34 3519 struct snd_usb_audio *chip = device->device_data;
1da177e4
LT		 3520 return snd_usb_audio_free(chip);
3521}
3522
3523
3524/*
3525 * create a chip instance and set its names.
3526 */
3527static int snd_usb_audio_create(struct usb_device *dev, int idx,
86e07d34
TI		 3528 const struct snd_usb_audio_quirk *quirk,
3529 struct snd_usb_audio **rchip)
1da177e4 3530{
86e07d34
TI		 3531 struct snd_card *card;
3532 struct snd_usb_audio *chip;
1da177e4
LT		 3533 int err, len;
3534 char component[14];
86e07d34 3535 static struct snd_device_ops ops = {
1da177e4
LT		 3536 .dev_free = snd_usb_audio_dev_free,
3537 };
3538
3539 *rchip = NULL;
3540
076639f6
CL		 3541 if (snd_usb_get_speed(dev) != USB_SPEED_LOW &&
3542 snd_usb_get_speed(dev) != USB_SPEED_FULL &&
1da177e4
LT		 3543 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3544 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3545 return -ENXIO;
3546 }
3547
bd7dd77c
TI		 3548 err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
3549 if (err < 0) {
1da177e4 3550 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
bd7dd77c 3551 return err;
1da177e4
LT		 3552 }
3553
561b220a 3554 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4
LT		 3555 if (! chip) {
3556 snd_card_free(card);
3557 return -ENOMEM;
3558 }
3559
3560 chip->index = idx;
3561 chip->dev = dev;
3562 chip->card = card;
27d10f56
CL		 3563 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3564 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3565 INIT_LIST_HEAD(&chip->pcm_list);
3566 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3567 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3568
3569 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3570 snd_usb_audio_free(chip);
3571 snd_card_free(card);
3572 return err;
3573 }
3574
3575 strcpy(card->driver, "USB-Audio");
3576 sprintf(component, "USB%04x:%04x",
27d10f56 3577 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3578 snd_component_add(card, component);
3579
3580 /* retrieve the device string as shortname */
3581 if (quirk && quirk->product_name) {
3582 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3583 } else {
3584 if (!dev->descriptor.iProduct ||
3585 usb_string(dev, dev->descriptor.iProduct,
3586 card->shortname, sizeof(card->shortname)) <= 0) {
3587 /* no name available from anywhere, so use ID */
3588 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3589 USB_ID_VENDOR(chip->usb_id),
3590 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3591 }
3592 }
3593
3594 /* retrieve the vendor and device strings as longname */
3595 if (quirk && quirk->vendor_name) {
3596 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3597 } else {
3598 if (dev->descriptor.iManufacturer)
3599 len = usb_string(dev, dev->descriptor.iManufacturer,
3600 card->longname, sizeof(card->longname));
3601 else
3602 len = 0;
3603 /* we don't really care if there isn't any vendor string */
3604 }
3605 if (len > 0)
3606 strlcat(card->longname, " ", sizeof(card->longname));
3607
3608 strlcat(card->longname, card->shortname, sizeof(card->longname));
3609
3610 len = strlcat(card->longname, " at ", sizeof(card->longname));
3611
3612 if (len < sizeof(card->longname))
3613 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3614
3615 strlcat(card->longname,
076639f6
CL		 3616 snd_usb_get_speed(dev) == USB_SPEED_LOW ? ", low speed" :
3617 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" :
3618 ", high speed",
1da177e4
LT		 3619 sizeof(card->longname));
3620
3621 snd_usb_audio_create_proc(chip);
3622
1da177e4
LT		 3623 *rchip = chip;
3624 return 0;
3625}
3626
3627
3628/*
3629 * probe the active usb device
3630 *
3631 * note that this can be called multiple times per a device, when it
3632 * includes multiple audio control interfaces.
3633 *
3634 * thus we check the usb device pointer and creates the card instance
3635 * only at the first time. the successive calls of this function will
3636 * append the pcm interface to the corresponding card.
3637 */
3638static void *snd_usb_audio_probe(struct usb_device *dev,
3639 struct usb_interface *intf,
3640 const struct usb_device_id *usb_id)
3641{
86e07d34 3642 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
1da177e4 3643 int i, err;
86e07d34 3644 struct snd_usb_audio *chip;
1da177e4
LT		 3645 struct usb_host_interface *alts;
3646 int ifnum;
27d10f56 3647 u32 id;
1da177e4
LT		 3648
3649 alts = &intf->altsetting[0];
3650 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3651 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3652 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3653 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3654 goto __err_val;
3655
3656 /* SB Extigy needs special boot-up sequence */
3657 /* if more models come, this will go to the quirk list. */
27d10f56 3658 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3659 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3660 goto __err_val;
1da177e4 3661 }
3a2f0856
CL		 3662 /* SB Audigy 2 NX needs its own boot-up magic, too */
3663 if (id == USB_ID(0x041e, 0x3020)) {
3664 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3665 goto __err_val;
3666 }
1da177e4 3667
e217e30c
SR		 3668 /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
3669 if (id == USB_ID(0x10f5, 0x0200)) {
3670 if (snd_usb_cm106_boot_quirk(dev) < 0)
3671 goto __err_val;
3672 }
3673
92a43793
DA		 3674 /* C-Media CM6206 / CM106-Like Sound Device */
3675 if (id == USB_ID(0x0d8c, 0x0102)) {
3676 if (snd_usb_cm6206_boot_quirk(dev) < 0)
3677 goto __err_val;
3678 }
3679
d39e82db
SA		 3680 /* Access Music VirusTI Desktop */
3681 if (id == USB_ID(0x133e, 0x0815)) {
3682 if (snd_usb_accessmusic_boot_quirk(dev) < 0)
3683 goto __err_val;
3684 }
3685
1da177e4
LT		 3686 /*
3687 * found a config. now register to ALSA
3688 */
3689
3690 /* check whether it's already registered */
3691 chip = NULL;
12aa7579 3692 mutex_lock(&register_mutex);
1da177e4
LT		 3693 for (i = 0; i < SNDRV_CARDS; i++) {
3694 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3695 if (usb_chip[i]->shutdown) {
3696 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3697 goto __error;
3698 }
3699 chip = usb_chip[i];
3700 break;
3701 }
3702 }
3703 if (! chip) {
3704 /* it's a fresh one.
3705 * now look for an empty slot and create a new card instance
3706 */
1da177e4
LT		 3707 for (i = 0; i < SNDRV_CARDS; i++)
3708 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3709 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3710 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3711 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3712 goto __error;
3713 }
1dcd3ec4 3714 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3715 break;
3716 }
07f51a72
PM		 3717 if (!chip) {
3718 printk(KERN_ERR "no available usb audio device\n");
1da177e4
LT		 3719 goto __error;
3720 }
3721 }
3722
52a7a583 3723 chip->txfr_quirk = 0;
1da177e4
LT		 3724 err = 1; /* continue */
3725 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3726 /* need some special handlings */
3727 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3728 goto __error;
3729 }
3730
3731 if (err > 0) {
3732 /* create normal USB audio interfaces */
3733 if (snd_usb_create_streams(chip, ifnum) < 0 ||
7a9b8063 3734 snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
1da177e4
LT		 3735 goto __error;
3736 }
3737 }
3738
3739 /* we are allowed to call snd_card_register() many times */
3740 if (snd_card_register(chip->card) < 0) {
3741 goto __error;
3742 }
3743
3744 usb_chip[chip->index] = chip;
3745 chip->num_interfaces++;
12aa7579 3746 mutex_unlock(&register_mutex);
1da177e4
LT		 3747 return chip;
3748
3749 __error:
3750 if (chip && !chip->num_interfaces)
3751 snd_card_free(chip->card);
12aa7579 3752 mutex_unlock(&register_mutex);
1da177e4
LT		 3753 __err_val:
3754 return NULL;
3755}
3756
3757/*
3758 * we need to take care of counter, since disconnection can be called also
3759 * many times as well as usb_audio_probe().
3760 */
3761static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3762{
86e07d34
TI		 3763 struct snd_usb_audio *chip;
3764 struct snd_card *card;
1da177e4
LT		 3765 struct list_head *p;
3766
3767 if (ptr == (void *)-1L)
3768 return;
3769
3770 chip = ptr;
3771 card = chip->card;
12aa7579 3772 mutex_lock(&register_mutex);
1da177e4
LT		 3773 chip->shutdown = 1;
3774 chip->num_interfaces--;
3775 if (chip->num_interfaces <= 0) {
3776 snd_card_disconnect(card);
3777 /* release the pcm resources */
3778 list_for_each(p, &chip->pcm_list) {
ee733397 3779 snd_usb_stream_disconnect(p);
1da177e4
LT		 3780 }
3781 /* release the midi resources */
3782 list_for_each(p, &chip->midi_list) {
ee733397 3783 snd_usbmidi_disconnect(p);
1da177e4 3784 }
84957a8a
CL		 3785 /* release mixer resources */
3786 list_for_each(p, &chip->mixer_list) {
3787 snd_usb_mixer_disconnect(p);
3788 }
9eb70e68 3789 usb_chip[chip->index] = NULL;
12aa7579 3790 mutex_unlock(&register_mutex);
c461482c 3791 snd_card_free_when_closed(card);
1da177e4 3792 } else {
12aa7579 3793 mutex_unlock(&register_mutex);
1da177e4
LT		 3794 }
3795}
3796
3797/*
3798 * new 2.5 USB kernel API
3799 */
3800static int usb_audio_probe(struct usb_interface *intf,
3801 const struct usb_device_id *id)
3802{
3803 void *chip;
3804 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3805 if (chip) {
f4e9749f 3806 usb_set_intfdata(intf, chip);
1da177e4
LT		 3807 return 0;
3808 } else
3809 return -EIO;
3810}
3811
3812static void usb_audio_disconnect(struct usb_interface *intf)
3813{
3814 snd_usb_audio_disconnect(interface_to_usbdev(intf),
f4e9749f 3815 usb_get_intfdata(intf));
1da177e4
LT		 3816}
3817
93521d27 3818#ifdef CONFIG_PM
f85bf29c
ON		 3819static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
3820{
f4e9749f 3821 struct snd_usb_audio *chip = usb_get_intfdata(intf);
f85bf29c
ON		 3822 struct list_head *p;
3823 struct snd_usb_stream *as;
3824
3825 if (chip == (void *)-1L)
3826 return 0;
3827
3828 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
3829 if (!chip->num_suspended_intf++) {
3830 list_for_each(p, &chip->pcm_list) {
3831 as = list_entry(p, struct snd_usb_stream, list);
3832 snd_pcm_suspend_all(as->pcm);
3833 }
3834 }
3835
3836 return 0;
3837}
3838
3839static int usb_audio_resume(struct usb_interface *intf)
3840{
f4e9749f 3841 struct snd_usb_audio *chip = usb_get_intfdata(intf);
f85bf29c
ON		 3842
3843 if (chip == (void *)-1L)
3844 return 0;
3845 if (--chip->num_suspended_intf)
3846 return 0;
3847 /*
3848 * ALSA leaves material resumption to user space
3849 * we just notify
3850 */
3851
3852 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
3853
3854 return 0;
3855}
93521d27 3856#endif /* CONFIG_PM */
1da177e4
LT		 3857
3858static int __init snd_usb_audio_init(void)
3859{
f3990e61 3860 if (nrpacks < 1 || nrpacks > MAX_PACKS) {
1da177e4
LT		 3861 printk(KERN_WARNING "invalid nrpacks value.\n");
3862 return -EINVAL;
3863 }
cf78bbc4 3864 return usb_register(&usb_audio_driver);
1da177e4
LT		 3865}
3866
3867
3868static void __exit snd_usb_audio_cleanup(void)
3869{
3870 usb_deregister(&usb_audio_driver);
3871}
3872
3873module_init(snd_usb_audio_init);
3874module_exit(snd_usb_audio_cleanup);
Linux kernel - Deliverables
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