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Merge /spare/repo/linux-2.6/
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / usb / usbaudio.c
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
41 #include <sound/driver.h>
42 #include <linux/bitops.h>
43 #include <linux/init.h>
44 #include <linux/interrupt.h>
45 #include <linux/list.h>
46 #include <linux/slab.h>
47 #include <linux/string.h>
48 #include <linux/usb.h>
49 #include <linux/vmalloc.h>
50 #include <linux/moduleparam.h>
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
60 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
61 MODULE_DESCRIPTION("USB Audio");
62 MODULE_LICENSE("GPL");
63 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
64
65
66 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
67 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
68 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
69 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
70 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
71 static int nrpacks = 4; /* max. number of packets per urb */
72 static int async_unlink = 1;
73
74 module_param_array(index, int, NULL, 0444);
75 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
76 module_param_array(id, charp, NULL, 0444);
77 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
78 module_param_array(enable, bool, NULL, 0444);
79 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
80 module_param_array(vid, int, NULL, 0444);
81 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
82 module_param_array(pid, int, NULL, 0444);
83 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
84 module_param(nrpacks, int, 0644);
85 MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
86 module_param(async_unlink, bool, 0444);
87 MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
88
89
90 /*
91 * debug the h/w constraints
92 */
93 /* #define HW_CONST_DEBUG */
94
95
96 /*
97 *
98 */
99
100 #define MAX_PACKS 10
101 #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
102 #define MAX_URBS 8
103 #define SYNC_URBS 4 /* always four urbs for sync */
104 #define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
105
106 typedef struct snd_usb_substream snd_usb_substream_t;
107 typedef struct snd_usb_stream snd_usb_stream_t;
108 typedef struct snd_urb_ctx snd_urb_ctx_t;
109
110 struct audioformat {
111 struct list_head list;
112 snd_pcm_format_t format; /* format type */
113 unsigned int channels; /* # channels */
114 unsigned int fmt_type; /* USB audio format type (1-3) */
115 unsigned int frame_size; /* samples per frame for non-audio */
116 int iface; /* interface number */
117 unsigned char altsetting; /* corresponding alternate setting */
118 unsigned char altset_idx; /* array index of altenate setting */
119 unsigned char attributes; /* corresponding attributes of cs endpoint */
120 unsigned char endpoint; /* endpoint */
121 unsigned char ep_attr; /* endpoint attributes */
122 unsigned int maxpacksize; /* max. packet size */
123 unsigned int rates; /* rate bitmasks */
124 unsigned int rate_min, rate_max; /* min/max rates */
125 unsigned int nr_rates; /* number of rate table entries */
126 unsigned int *rate_table; /* rate table */
127 };
128
129 struct snd_urb_ctx {
130 struct urb *urb;
131 unsigned int buffer_size; /* size of data buffer, if data URB */
132 snd_usb_substream_t *subs;
133 int index; /* index for urb array */
134 int packets; /* number of packets per urb */
135 };
136
137 struct snd_urb_ops {
138 int (*prepare)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
139 int (*retire)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
140 int (*prepare_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
141 int (*retire_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
142 };
143
144 struct snd_usb_substream {
145 snd_usb_stream_t *stream;
146 struct usb_device *dev;
147 snd_pcm_substream_t *pcm_substream;
148 int direction; /* playback or capture */
149 int interface; /* current interface */
150 int endpoint; /* assigned endpoint */
151 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
152 unsigned int cur_rate; /* current rate (for hw_params callback) */
153 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
154 unsigned int format; /* USB data format */
155 unsigned int datapipe; /* the data i/o pipe */
156 unsigned int syncpipe; /* 1 - async out or adaptive in */
157 unsigned int datainterval; /* log_2 of data packet interval */
158 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
159 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
160 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
161 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
162 unsigned int phase; /* phase accumulator */
163 unsigned int maxpacksize; /* max packet size in bytes */
164 unsigned int maxframesize; /* max packet size in frames */
165 unsigned int curpacksize; /* current packet size in bytes (for capture) */
166 unsigned int curframesize; /* current packet size in frames (for capture) */
167 unsigned int fill_max: 1; /* fill max packet size always */
168 unsigned int fmt_type; /* USB audio format type (1-3) */
169 unsigned int packs_per_ms; /* packets per millisecond (for playback) */
170
171 unsigned int running: 1; /* running status */
172
173 unsigned int hwptr_done; /* processed frame position in the buffer */
174 unsigned int transfer_done; /* processed frames since last period update */
175 unsigned long active_mask; /* bitmask of active urbs */
176 unsigned long unlink_mask; /* bitmask of unlinked urbs */
177
178 unsigned int nurbs; /* # urbs */
179 snd_urb_ctx_t dataurb[MAX_URBS]; /* data urb table */
180 snd_urb_ctx_t syncurb[SYNC_URBS]; /* sync urb table */
181 char *syncbuf; /* sync buffer for all sync URBs */
182 dma_addr_t sync_dma; /* DMA address of syncbuf */
183
184 u64 formats; /* format bitmasks (all or'ed) */
185 unsigned int num_formats; /* number of supported audio formats (list) */
186 struct list_head fmt_list; /* format list */
187 spinlock_t lock;
188 struct tasklet_struct start_period_elapsed; /* for start trigger */
189
190 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
191 };
192
193
194 struct snd_usb_stream {
195 snd_usb_audio_t *chip;
196 snd_pcm_t *pcm;
197 int pcm_index;
198 unsigned int fmt_type; /* USB audio format type (1-3) */
199 snd_usb_substream_t substream[2];
200 struct list_head list;
201 };
202
203
204 /*
205 * we keep the snd_usb_audio_t instances by ourselves for merging
206 * the all interfaces on the same card as one sound device.
207 */
208
209 static DECLARE_MUTEX(register_mutex);
210 static snd_usb_audio_t *usb_chip[SNDRV_CARDS];
211
212
213 /*
214 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
215 * this will overflow at approx 524 kHz
216 */
217 static inline unsigned get_usb_full_speed_rate(unsigned int rate)
218 {
219 return ((rate << 13) + 62) / 125;
220 }
221
222 /*
223 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
224 * this will overflow at approx 4 MHz
225 */
226 static inline unsigned get_usb_high_speed_rate(unsigned int rate)
227 {
228 return ((rate << 10) + 62) / 125;
229 }
230
231 /* convert our full speed USB rate into sampling rate in Hz */
232 static inline unsigned get_full_speed_hz(unsigned int usb_rate)
233 {
234 return (usb_rate * 125 + (1 << 12)) >> 13;
235 }
236
237 /* convert our high speed USB rate into sampling rate in Hz */
238 static inline unsigned get_high_speed_hz(unsigned int usb_rate)
239 {
240 return (usb_rate * 125 + (1 << 9)) >> 10;
241 }
242
243
244 /*
245 * prepare urb for full speed capture sync pipe
246 *
247 * fill the length and offset of each urb descriptor.
248 * the fixed 10.14 frequency is passed through the pipe.
249 */
250 static int prepare_capture_sync_urb(snd_usb_substream_t *subs,
251 snd_pcm_runtime_t *runtime,
252 struct urb *urb)
253 {
254 unsigned char *cp = urb->transfer_buffer;
255 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
256
257 urb->dev = ctx->subs->dev; /* we need to set this at each time */
258 urb->iso_frame_desc[0].length = 3;
259 urb->iso_frame_desc[0].offset = 0;
260 cp[0] = subs->freqn >> 2;
261 cp[1] = subs->freqn >> 10;
262 cp[2] = subs->freqn >> 18;
263 return 0;
264 }
265
266 /*
267 * prepare urb for high speed capture sync pipe
268 *
269 * fill the length and offset of each urb descriptor.
270 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
271 */
272 static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs,
273 snd_pcm_runtime_t *runtime,
274 struct urb *urb)
275 {
276 unsigned char *cp = urb->transfer_buffer;
277 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
278
279 urb->dev = ctx->subs->dev; /* we need to set this at each time */
280 urb->iso_frame_desc[0].length = 4;
281 urb->iso_frame_desc[0].offset = 0;
282 cp[0] = subs->freqn;
283 cp[1] = subs->freqn >> 8;
284 cp[2] = subs->freqn >> 16;
285 cp[3] = subs->freqn >> 24;
286 return 0;
287 }
288
289 /*
290 * process after capture sync complete
291 * - nothing to do
292 */
293 static int retire_capture_sync_urb(snd_usb_substream_t *subs,
294 snd_pcm_runtime_t *runtime,
295 struct urb *urb)
296 {
297 return 0;
298 }
299
300 /*
301 * prepare urb for capture data pipe
302 *
303 * fill the offset and length of each descriptor.
304 *
305 * we use a temporary buffer to write the captured data.
306 * since the length of written data is determined by host, we cannot
307 * write onto the pcm buffer directly... the data is thus copied
308 * later at complete callback to the global buffer.
309 */
310 static int prepare_capture_urb(snd_usb_substream_t *subs,
311 snd_pcm_runtime_t *runtime,
312 struct urb *urb)
313 {
314 int i, offs;
315 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
316
317 offs = 0;
318 urb->dev = ctx->subs->dev; /* we need to set this at each time */
319 for (i = 0; i < ctx->packets; i++) {
320 urb->iso_frame_desc[i].offset = offs;
321 urb->iso_frame_desc[i].length = subs->curpacksize;
322 offs += subs->curpacksize;
323 }
324 urb->transfer_buffer_length = offs;
325 urb->number_of_packets = ctx->packets;
326 #if 0 // for check
327 if (! urb->bandwidth) {
328 int bustime;
329 bustime = usb_check_bandwidth(urb->dev, urb);
330 if (bustime < 0)
331 return bustime;
332 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
333 usb_claim_bandwidth(urb->dev, urb, bustime, 1);
334 }
335 #endif // for check
336 return 0;
337 }
338
339 /*
340 * process after capture complete
341 *
342 * copy the data from each desctiptor to the pcm buffer, and
343 * update the current position.
344 */
345 static int retire_capture_urb(snd_usb_substream_t *subs,
346 snd_pcm_runtime_t *runtime,
347 struct urb *urb)
348 {
349 unsigned long flags;
350 unsigned char *cp;
351 int i;
352 unsigned int stride, len, oldptr;
353 int period_elapsed = 0;
354
355 stride = runtime->frame_bits >> 3;
356
357 for (i = 0; i < urb->number_of_packets; i++) {
358 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
359 if (urb->iso_frame_desc[i].status) {
360 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
361 // continue;
362 }
363 len = urb->iso_frame_desc[i].actual_length / stride;
364 if (! len)
365 continue;
366 /* update the current pointer */
367 spin_lock_irqsave(&subs->lock, flags);
368 oldptr = subs->hwptr_done;
369 subs->hwptr_done += len;
370 if (subs->hwptr_done >= runtime->buffer_size)
371 subs->hwptr_done -= runtime->buffer_size;
372 subs->transfer_done += len;
373 if (subs->transfer_done >= runtime->period_size) {
374 subs->transfer_done -= runtime->period_size;
375 period_elapsed = 1;
376 }
377 spin_unlock_irqrestore(&subs->lock, flags);
378 /* copy a data chunk */
379 if (oldptr + len > runtime->buffer_size) {
380 unsigned int cnt = runtime->buffer_size - oldptr;
381 unsigned int blen = cnt * stride;
382 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
383 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
384 } else {
385 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
386 }
387 }
388 if (period_elapsed)
389 snd_pcm_period_elapsed(subs->pcm_substream);
390 return 0;
391 }
392
393
394 /*
395 * prepare urb for full speed playback sync pipe
396 *
397 * set up the offset and length to receive the current frequency.
398 */
399
400 static int prepare_playback_sync_urb(snd_usb_substream_t *subs,
401 snd_pcm_runtime_t *runtime,
402 struct urb *urb)
403 {
404 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
405
406 urb->dev = ctx->subs->dev; /* we need to set this at each time */
407 urb->iso_frame_desc[0].length = 3;
408 urb->iso_frame_desc[0].offset = 0;
409 return 0;
410 }
411
412 /*
413 * prepare urb for high speed playback sync pipe
414 *
415 * set up the offset and length to receive the current frequency.
416 */
417
418 static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs,
419 snd_pcm_runtime_t *runtime,
420 struct urb *urb)
421 {
422 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
423
424 urb->dev = ctx->subs->dev; /* we need to set this at each time */
425 urb->iso_frame_desc[0].length = 4;
426 urb->iso_frame_desc[0].offset = 0;
427 return 0;
428 }
429
430 /*
431 * process after full speed playback sync complete
432 *
433 * retrieve the current 10.14 frequency from pipe, and set it.
434 * the value is referred in prepare_playback_urb().
435 */
436 static int retire_playback_sync_urb(snd_usb_substream_t *subs,
437 snd_pcm_runtime_t *runtime,
438 struct urb *urb)
439 {
440 unsigned int f;
441 unsigned long flags;
442
443 if (urb->iso_frame_desc[0].status == 0 &&
444 urb->iso_frame_desc[0].actual_length == 3) {
445 f = combine_triple((u8*)urb->transfer_buffer) << 2;
446 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
447 spin_lock_irqsave(&subs->lock, flags);
448 subs->freqm = f;
449 spin_unlock_irqrestore(&subs->lock, flags);
450 }
451 }
452
453 return 0;
454 }
455
456 /*
457 * process after high speed playback sync complete
458 *
459 * retrieve the current 12.13 frequency from pipe, and set it.
460 * the value is referred in prepare_playback_urb().
461 */
462 static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs,
463 snd_pcm_runtime_t *runtime,
464 struct urb *urb)
465 {
466 unsigned int f;
467 unsigned long flags;
468
469 if (urb->iso_frame_desc[0].status == 0 &&
470 urb->iso_frame_desc[0].actual_length == 4) {
471 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
472 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
473 spin_lock_irqsave(&subs->lock, flags);
474 subs->freqm = f;
475 spin_unlock_irqrestore(&subs->lock, flags);
476 }
477 }
478
479 return 0;
480 }
481
482 /*
483 * prepare urb for playback data pipe
484 *
485 * Since a URB can handle only a single linear buffer, we must use double
486 * buffering when the data to be transferred overflows the buffer boundary.
487 * To avoid inconsistencies when updating hwptr_done, we use double buffering
488 * for all URBs.
489 */
490 static int prepare_playback_urb(snd_usb_substream_t *subs,
491 snd_pcm_runtime_t *runtime,
492 struct urb *urb)
493 {
494 int i, stride, offs;
495 unsigned int counts;
496 unsigned long flags;
497 int period_elapsed = 0;
498 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
499
500 stride = runtime->frame_bits >> 3;
501
502 offs = 0;
503 urb->dev = ctx->subs->dev; /* we need to set this at each time */
504 urb->number_of_packets = 0;
505 spin_lock_irqsave(&subs->lock, flags);
506 for (i = 0; i < ctx->packets; i++) {
507 /* calculate the size of a packet */
508 if (subs->fill_max)
509 counts = subs->maxframesize; /* fixed */
510 else {
511 subs->phase = (subs->phase & 0xffff)
512 + (subs->freqm << subs->datainterval);
513 counts = subs->phase >> 16;
514 if (counts > subs->maxframesize)
515 counts = subs->maxframesize;
516 }
517 /* set up descriptor */
518 urb->iso_frame_desc[i].offset = offs * stride;
519 urb->iso_frame_desc[i].length = counts * stride;
520 offs += counts;
521 urb->number_of_packets++;
522 subs->transfer_done += counts;
523 if (subs->transfer_done >= runtime->period_size) {
524 subs->transfer_done -= runtime->period_size;
525 period_elapsed = 1;
526 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
527 if (subs->transfer_done > 0) {
528 /* FIXME: fill-max mode is not
529 * supported yet */
530 offs -= subs->transfer_done;
531 counts -= subs->transfer_done;
532 urb->iso_frame_desc[i].length =
533 counts * stride;
534 subs->transfer_done = 0;
535 }
536 i++;
537 if (i < ctx->packets) {
538 /* add a transfer delimiter */
539 urb->iso_frame_desc[i].offset =
540 offs * stride;
541 urb->iso_frame_desc[i].length = 0;
542 urb->number_of_packets++;
543 }
544 break;
545 }
546 }
547 /* finish at the frame boundary at/after the period boundary */
548 if (period_elapsed &&
549 (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
550 break;
551 }
552 if (subs->hwptr_done + offs > runtime->buffer_size) {
553 /* err, the transferred area goes over buffer boundary. */
554 unsigned int len = runtime->buffer_size - subs->hwptr_done;
555 memcpy(urb->transfer_buffer,
556 runtime->dma_area + subs->hwptr_done * stride,
557 len * stride);
558 memcpy(urb->transfer_buffer + len * stride,
559 runtime->dma_area,
560 (offs - len) * stride);
561 } else {
562 memcpy(urb->transfer_buffer,
563 runtime->dma_area + subs->hwptr_done * stride,
564 offs * stride);
565 }
566 subs->hwptr_done += offs;
567 if (subs->hwptr_done >= runtime->buffer_size)
568 subs->hwptr_done -= runtime->buffer_size;
569 spin_unlock_irqrestore(&subs->lock, flags);
570 urb->transfer_buffer_length = offs * stride;
571 if (period_elapsed) {
572 if (likely(subs->running))
573 snd_pcm_period_elapsed(subs->pcm_substream);
574 else
575 tasklet_hi_schedule(&subs->start_period_elapsed);
576 }
577 return 0;
578 }
579
580 /*
581 * process after playback data complete
582 * - nothing to do
583 */
584 static int retire_playback_urb(snd_usb_substream_t *subs,
585 snd_pcm_runtime_t *runtime,
586 struct urb *urb)
587 {
588 return 0;
589 }
590
591 /*
592 * Delay the snd_pcm_period_elapsed() call until after the start trigger
593 * callback so that we're not longer in the substream's lock.
594 */
595 static void start_period_elapsed(unsigned long data)
596 {
597 snd_usb_substream_t *subs = (snd_usb_substream_t *)data;
598 snd_pcm_period_elapsed(subs->pcm_substream);
599 }
600
601
602 /*
603 */
604 static struct snd_urb_ops audio_urb_ops[2] = {
605 {
606 .prepare = prepare_playback_urb,
607 .retire = retire_playback_urb,
608 .prepare_sync = prepare_playback_sync_urb,
609 .retire_sync = retire_playback_sync_urb,
610 },
611 {
612 .prepare = prepare_capture_urb,
613 .retire = retire_capture_urb,
614 .prepare_sync = prepare_capture_sync_urb,
615 .retire_sync = retire_capture_sync_urb,
616 },
617 };
618
619 static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
620 {
621 .prepare = prepare_playback_urb,
622 .retire = retire_playback_urb,
623 .prepare_sync = prepare_playback_sync_urb_hs,
624 .retire_sync = retire_playback_sync_urb_hs,
625 },
626 {
627 .prepare = prepare_capture_urb,
628 .retire = retire_capture_urb,
629 .prepare_sync = prepare_capture_sync_urb_hs,
630 .retire_sync = retire_capture_sync_urb,
631 },
632 };
633
634 /*
635 * complete callback from data urb
636 */
637 static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
638 {
639 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
640 snd_usb_substream_t *subs = ctx->subs;
641 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
642 int err = 0;
643
644 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
645 ! subs->running || /* can be stopped during retire callback */
646 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
647 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
648 clear_bit(ctx->index, &subs->active_mask);
649 if (err < 0) {
650 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
651 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
652 }
653 }
654 }
655
656
657 /*
658 * complete callback from sync urb
659 */
660 static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
661 {
662 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
663 snd_usb_substream_t *subs = ctx->subs;
664 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
665 int err = 0;
666
667 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
668 ! subs->running || /* can be stopped during retire callback */
669 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
670 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
671 clear_bit(ctx->index + 16, &subs->active_mask);
672 if (err < 0) {
673 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
674 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
675 }
676 }
677 }
678
679
680 /* get the physical page pointer at the given offset */
681 static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs,
682 unsigned long offset)
683 {
684 void *pageptr = subs->runtime->dma_area + offset;
685 return vmalloc_to_page(pageptr);
686 }
687
688 /* allocate virtual buffer; may be called more than once */
689 static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size)
690 {
691 snd_pcm_runtime_t *runtime = subs->runtime;
692 if (runtime->dma_area) {
693 if (runtime->dma_bytes >= size)
694 return 0; /* already large enough */
695 vfree_nocheck(runtime->dma_area);
696 }
697 runtime->dma_area = vmalloc_nocheck(size);
698 if (! runtime->dma_area)
699 return -ENOMEM;
700 runtime->dma_bytes = size;
701 return 0;
702 }
703
704 /* free virtual buffer; may be called more than once */
705 static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs)
706 {
707 snd_pcm_runtime_t *runtime = subs->runtime;
708 if (runtime->dma_area) {
709 vfree_nocheck(runtime->dma_area);
710 runtime->dma_area = NULL;
711 }
712 return 0;
713 }
714
715
716 /*
717 * unlink active urbs.
718 */
719 static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
720 {
721 unsigned int i;
722 int async;
723
724 subs->running = 0;
725
726 if (!force && subs->stream->chip->shutdown) /* to be sure... */
727 return -EBADFD;
728
729 async = !can_sleep && async_unlink;
730
731 if (! async && in_interrupt())
732 return 0;
733
734 for (i = 0; i < subs->nurbs; i++) {
735 if (test_bit(i, &subs->active_mask)) {
736 if (! test_and_set_bit(i, &subs->unlink_mask)) {
737 struct urb *u = subs->dataurb[i].urb;
738 if (async)
739 usb_unlink_urb(u);
740 else
741 usb_kill_urb(u);
742 }
743 }
744 }
745 if (subs->syncpipe) {
746 for (i = 0; i < SYNC_URBS; i++) {
747 if (test_bit(i+16, &subs->active_mask)) {
748 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
749 struct urb *u = subs->syncurb[i].urb;
750 if (async)
751 usb_unlink_urb(u);
752 else
753 usb_kill_urb(u);
754 }
755 }
756 }
757 }
758 return 0;
759 }
760
761
762 /*
763 * set up and start data/sync urbs
764 */
765 static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
766 {
767 unsigned int i;
768 int err;
769
770 if (subs->stream->chip->shutdown)
771 return -EBADFD;
772
773 for (i = 0; i < subs->nurbs; i++) {
774 snd_assert(subs->dataurb[i].urb, return -EINVAL);
775 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
776 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
777 goto __error;
778 }
779 }
780 if (subs->syncpipe) {
781 for (i = 0; i < SYNC_URBS; i++) {
782 snd_assert(subs->syncurb[i].urb, return -EINVAL);
783 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
784 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
785 goto __error;
786 }
787 }
788 }
789
790 subs->active_mask = 0;
791 subs->unlink_mask = 0;
792 subs->running = 1;
793 for (i = 0; i < subs->nurbs; i++) {
794 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
795 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
796 goto __error;
797 }
798 set_bit(i, &subs->active_mask);
799 }
800 if (subs->syncpipe) {
801 for (i = 0; i < SYNC_URBS; i++) {
802 if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
803 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
804 goto __error;
805 }
806 set_bit(i + 16, &subs->active_mask);
807 }
808 }
809 return 0;
810
811 __error:
812 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
813 deactivate_urbs(subs, 0, 0);
814 return -EPIPE;
815 }
816
817
818 /*
819 * wait until all urbs are processed.
820 */
821 static int wait_clear_urbs(snd_usb_substream_t *subs)
822 {
823 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
824 unsigned int i;
825 int alive;
826
827 do {
828 alive = 0;
829 for (i = 0; i < subs->nurbs; i++) {
830 if (test_bit(i, &subs->active_mask))
831 alive++;
832 }
833 if (subs->syncpipe) {
834 for (i = 0; i < SYNC_URBS; i++) {
835 if (test_bit(i + 16, &subs->active_mask))
836 alive++;
837 }
838 }
839 if (! alive)
840 break;
841 set_current_state(TASK_UNINTERRUPTIBLE);
842 schedule_timeout(1);
843 } while (time_before(jiffies, end_time));
844 if (alive)
845 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
846 return 0;
847 }
848
849
850 /*
851 * return the current pcm pointer. just return the hwptr_done value.
852 */
853 static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
854 {
855 snd_usb_substream_t *subs;
856 snd_pcm_uframes_t hwptr_done;
857
858 subs = (snd_usb_substream_t *)substream->runtime->private_data;
859 spin_lock(&subs->lock);
860 hwptr_done = subs->hwptr_done;
861 spin_unlock(&subs->lock);
862 return hwptr_done;
863 }
864
865
866 /*
867 * start/stop substream
868 */
869 static int snd_usb_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
870 {
871 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
872 int err;
873
874 switch (cmd) {
875 case SNDRV_PCM_TRIGGER_START:
876 err = start_urbs(subs, substream->runtime);
877 break;
878 case SNDRV_PCM_TRIGGER_STOP:
879 err = deactivate_urbs(subs, 0, 0);
880 break;
881 default:
882 err = -EINVAL;
883 break;
884 }
885 return err < 0 ? err : 0;
886 }
887
888
889 /*
890 * release a urb data
891 */
892 static void release_urb_ctx(snd_urb_ctx_t *u)
893 {
894 if (u->urb) {
895 if (u->buffer_size)
896 usb_buffer_free(u->subs->dev, u->buffer_size,
897 u->urb->transfer_buffer,
898 u->urb->transfer_dma);
899 usb_free_urb(u->urb);
900 u->urb = NULL;
901 }
902 }
903
904 /*
905 * release a substream
906 */
907 static void release_substream_urbs(snd_usb_substream_t *subs, int force)
908 {
909 int i;
910
911 /* stop urbs (to be sure) */
912 deactivate_urbs(subs, force, 1);
913 wait_clear_urbs(subs);
914
915 for (i = 0; i < MAX_URBS; i++)
916 release_urb_ctx(&subs->dataurb[i]);
917 for (i = 0; i < SYNC_URBS; i++)
918 release_urb_ctx(&subs->syncurb[i]);
919 usb_buffer_free(subs->dev, SYNC_URBS * 4,
920 subs->syncbuf, subs->sync_dma);
921 subs->syncbuf = NULL;
922 subs->nurbs = 0;
923 }
924
925 /*
926 * initialize a substream for plaback/capture
927 */
928 static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes,
929 unsigned int rate, unsigned int frame_bits)
930 {
931 unsigned int maxsize, n, i;
932 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
933 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
934
935 /* calculate the frequency in 16.16 format */
936 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
937 subs->freqn = get_usb_full_speed_rate(rate);
938 else
939 subs->freqn = get_usb_high_speed_rate(rate);
940 subs->freqm = subs->freqn;
941 /* calculate max. frequency */
942 if (subs->maxpacksize) {
943 /* whatever fits into a max. size packet */
944 maxsize = subs->maxpacksize;
945 subs->freqmax = (maxsize / (frame_bits >> 3))
946 << (16 - subs->datainterval);
947 } else {
948 /* no max. packet size: just take 25% higher than nominal */
949 subs->freqmax = subs->freqn + (subs->freqn >> 2);
950 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
951 >> (16 - subs->datainterval);
952 }
953 subs->phase = 0;
954
955 if (subs->fill_max)
956 subs->curpacksize = subs->maxpacksize;
957 else
958 subs->curpacksize = maxsize;
959
960 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
961 packs_per_ms = 8 >> subs->datainterval;
962 else
963 packs_per_ms = 1;
964 subs->packs_per_ms = packs_per_ms;
965
966 if (is_playback) {
967 urb_packs = nrpacks;
968 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
969 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
970 } else
971 urb_packs = 1;
972 urb_packs *= packs_per_ms;
973
974 /* decide how many packets to be used */
975 if (is_playback) {
976 unsigned int minsize;
977 /* determine how small a packet can be */
978 minsize = (subs->freqn >> (16 - subs->datainterval))
979 * (frame_bits >> 3);
980 /* with sync from device, assume it can be 12% lower */
981 if (subs->syncpipe)
982 minsize -= minsize >> 3;
983 minsize = max(minsize, 1u);
984 total_packs = (period_bytes + minsize - 1) / minsize;
985 /* round up to multiple of packs_per_ms */
986 total_packs = (total_packs + packs_per_ms - 1)
987 & ~(packs_per_ms - 1);
988 /* we need at least two URBs for queueing */
989 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
990 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
991 } else {
992 total_packs = MAX_URBS * urb_packs;
993 }
994 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
995 if (subs->nurbs > MAX_URBS) {
996 /* too much... */
997 subs->nurbs = MAX_URBS;
998 total_packs = MAX_URBS * urb_packs;
999 }
1000 n = total_packs;
1001 for (i = 0; i < subs->nurbs; i++) {
1002 npacks[i] = n > urb_packs ? urb_packs : n;
1003 n -= urb_packs;
1004 }
1005 if (subs->nurbs <= 1) {
1006 /* too little - we need at least two packets
1007 * to ensure contiguous playback/capture
1008 */
1009 subs->nurbs = 2;
1010 npacks[0] = (total_packs + 1) / 2;
1011 npacks[1] = total_packs - npacks[0];
1012 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1013 /* the last packet is too small.. */
1014 if (subs->nurbs > 2) {
1015 /* merge to the first one */
1016 npacks[0] += npacks[subs->nurbs - 1];
1017 subs->nurbs--;
1018 } else {
1019 /* divide to two */
1020 subs->nurbs = 2;
1021 npacks[0] = (total_packs + 1) / 2;
1022 npacks[1] = total_packs - npacks[0];
1023 }
1024 }
1025
1026 /* allocate and initialize data urbs */
1027 for (i = 0; i < subs->nurbs; i++) {
1028 snd_urb_ctx_t *u = &subs->dataurb[i];
1029 u->index = i;
1030 u->subs = subs;
1031 u->packets = npacks[i];
1032 u->buffer_size = maxsize * u->packets;
1033 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1034 u->packets++; /* for transfer delimiter */
1035 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
1036 if (! u->urb)
1037 goto out_of_memory;
1038 u->urb->transfer_buffer =
1039 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1040 &u->urb->transfer_dma);
1041 if (! u->urb->transfer_buffer)
1042 goto out_of_memory;
1043 u->urb->pipe = subs->datapipe;
1044 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1045 u->urb->interval = 1 << subs->datainterval;
1046 u->urb->context = u;
1047 u->urb->complete = snd_usb_complete_callback(snd_complete_urb);
1048 }
1049
1050 if (subs->syncpipe) {
1051 /* allocate and initialize sync urbs */
1052 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1053 GFP_KERNEL, &subs->sync_dma);
1054 if (! subs->syncbuf)
1055 goto out_of_memory;
1056 for (i = 0; i < SYNC_URBS; i++) {
1057 snd_urb_ctx_t *u = &subs->syncurb[i];
1058 u->index = i;
1059 u->subs = subs;
1060 u->packets = 1;
1061 u->urb = usb_alloc_urb(1, GFP_KERNEL);
1062 if (! u->urb)
1063 goto out_of_memory;
1064 u->urb->transfer_buffer = subs->syncbuf + i * 4;
1065 u->urb->transfer_dma = subs->sync_dma + i * 4;
1066 u->urb->transfer_buffer_length = 4;
1067 u->urb->pipe = subs->syncpipe;
1068 u->urb->transfer_flags = URB_ISO_ASAP |
1069 URB_NO_TRANSFER_DMA_MAP;
1070 u->urb->number_of_packets = 1;
1071 u->urb->interval = 1 << subs->syncinterval;
1072 u->urb->context = u;
1073 u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb);
1074 }
1075 }
1076 return 0;
1077
1078 out_of_memory:
1079 release_substream_urbs(subs, 0);
1080 return -ENOMEM;
1081 }
1082
1083
1084 /*
1085 * find a matching audio format
1086 */
1087 static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format,
1088 unsigned int rate, unsigned int channels)
1089 {
1090 struct list_head *p;
1091 struct audioformat *found = NULL;
1092 int cur_attr = 0, attr;
1093
1094 list_for_each(p, &subs->fmt_list) {
1095 struct audioformat *fp;
1096 fp = list_entry(p, struct audioformat, list);
1097 if (fp->format != format || fp->channels != channels)
1098 continue;
1099 if (rate < fp->rate_min || rate > fp->rate_max)
1100 continue;
1101 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1102 unsigned int i;
1103 for (i = 0; i < fp->nr_rates; i++)
1104 if (fp->rate_table[i] == rate)
1105 break;
1106 if (i >= fp->nr_rates)
1107 continue;
1108 }
1109 attr = fp->ep_attr & EP_ATTR_MASK;
1110 if (! found) {
1111 found = fp;
1112 cur_attr = attr;
1113 continue;
1114 }
1115 /* avoid async out and adaptive in if the other method
1116 * supports the same format.
1117 * this is a workaround for the case like
1118 * M-audio audiophile USB.
1119 */
1120 if (attr != cur_attr) {
1121 if ((attr == EP_ATTR_ASYNC &&
1122 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1123 (attr == EP_ATTR_ADAPTIVE &&
1124 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1125 continue;
1126 if ((cur_attr == EP_ATTR_ASYNC &&
1127 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1128 (cur_attr == EP_ATTR_ADAPTIVE &&
1129 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1130 found = fp;
1131 cur_attr = attr;
1132 continue;
1133 }
1134 }
1135 /* find the format with the largest max. packet size */
1136 if (fp->maxpacksize > found->maxpacksize) {
1137 found = fp;
1138 cur_attr = attr;
1139 }
1140 }
1141 return found;
1142 }
1143
1144
1145 /*
1146 * initialize the picth control and sample rate
1147 */
1148 static int init_usb_pitch(struct usb_device *dev, int iface,
1149 struct usb_host_interface *alts,
1150 struct audioformat *fmt)
1151 {
1152 unsigned int ep;
1153 unsigned char data[1];
1154 int err;
1155
1156 ep = get_endpoint(alts, 0)->bEndpointAddress;
1157 /* if endpoint has pitch control, enable it */
1158 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1159 data[0] = 1;
1160 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1161 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1162 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1163 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1164 dev->devnum, iface, ep);
1165 return err;
1166 }
1167 }
1168 return 0;
1169 }
1170
1171 static int init_usb_sample_rate(struct usb_device *dev, int iface,
1172 struct usb_host_interface *alts,
1173 struct audioformat *fmt, int rate)
1174 {
1175 unsigned int ep;
1176 unsigned char data[3];
1177 int err;
1178
1179 ep = get_endpoint(alts, 0)->bEndpointAddress;
1180 /* if endpoint has sampling rate control, set it */
1181 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1182 int crate;
1183 data[0] = rate;
1184 data[1] = rate >> 8;
1185 data[2] = rate >> 16;
1186 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1187 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1188 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1189 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1190 dev->devnum, iface, fmt->altsetting, rate, ep);
1191 return err;
1192 }
1193 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1194 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1195 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1196 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1197 dev->devnum, iface, fmt->altsetting, ep);
1198 return 0; /* some devices don't support reading */
1199 }
1200 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1201 if (crate != rate) {
1202 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1203 // runtime->rate = crate;
1204 }
1205 }
1206 return 0;
1207 }
1208
1209 /*
1210 * find a matching format and set up the interface
1211 */
1212 static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
1213 {
1214 struct usb_device *dev = subs->dev;
1215 struct usb_host_interface *alts;
1216 struct usb_interface_descriptor *altsd;
1217 struct usb_interface *iface;
1218 unsigned int ep, attr;
1219 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1220 int err;
1221
1222 iface = usb_ifnum_to_if(dev, fmt->iface);
1223 snd_assert(iface, return -EINVAL);
1224 alts = &iface->altsetting[fmt->altset_idx];
1225 altsd = get_iface_desc(alts);
1226 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1227
1228 if (fmt == subs->cur_audiofmt)
1229 return 0;
1230
1231 /* close the old interface */
1232 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1233 usb_set_interface(subs->dev, subs->interface, 0);
1234 subs->interface = -1;
1235 subs->format = 0;
1236 }
1237
1238 /* set interface */
1239 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1240 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1241 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1242 dev->devnum, fmt->iface, fmt->altsetting);
1243 return -EIO;
1244 }
1245 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1246 subs->interface = fmt->iface;
1247 subs->format = fmt->altset_idx;
1248 }
1249
1250 /* create a data pipe */
1251 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1252 if (is_playback)
1253 subs->datapipe = usb_sndisocpipe(dev, ep);
1254 else
1255 subs->datapipe = usb_rcvisocpipe(dev, ep);
1256 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1257 get_endpoint(alts, 0)->bInterval >= 1 &&
1258 get_endpoint(alts, 0)->bInterval <= 4)
1259 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1260 else
1261 subs->datainterval = 0;
1262 subs->syncpipe = subs->syncinterval = 0;
1263 subs->maxpacksize = fmt->maxpacksize;
1264 subs->fill_max = 0;
1265
1266 /* we need a sync pipe in async OUT or adaptive IN mode */
1267 /* check the number of EP, since some devices have broken
1268 * descriptors which fool us. if it has only one EP,
1269 * assume it as adaptive-out or sync-in.
1270 */
1271 attr = fmt->ep_attr & EP_ATTR_MASK;
1272 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1273 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1274 altsd->bNumEndpoints >= 2) {
1275 /* check sync-pipe endpoint */
1276 /* ... and check descriptor size before accessing bSynchAddress
1277 because there is a version of the SB Audigy 2 NX firmware lacking
1278 the audio fields in the endpoint descriptors */
1279 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1280 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1281 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1282 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1283 dev->devnum, fmt->iface, fmt->altsetting);
1284 return -EINVAL;
1285 }
1286 ep = get_endpoint(alts, 1)->bEndpointAddress;
1287 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1288 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1289 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1290 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1291 dev->devnum, fmt->iface, fmt->altsetting);
1292 return -EINVAL;
1293 }
1294 ep &= USB_ENDPOINT_NUMBER_MASK;
1295 if (is_playback)
1296 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1297 else
1298 subs->syncpipe = usb_sndisocpipe(dev, ep);
1299 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1300 get_endpoint(alts, 1)->bRefresh >= 1 &&
1301 get_endpoint(alts, 1)->bRefresh <= 9)
1302 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
1303 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1304 subs->syncinterval = 1;
1305 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1306 get_endpoint(alts, 1)->bInterval <= 16)
1307 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1308 else
1309 subs->syncinterval = 3;
1310 }
1311
1312 /* always fill max packet size */
1313 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1314 subs->fill_max = 1;
1315
1316 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1317 return err;
1318
1319 subs->cur_audiofmt = fmt;
1320
1321 #if 0
1322 printk("setting done: format = %d, rate = %d, channels = %d\n",
1323 fmt->format, fmt->rate, fmt->channels);
1324 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1325 subs->datapipe, subs->syncpipe);
1326 #endif
1327
1328 return 0;
1329 }
1330
1331 /*
1332 * hw_params callback
1333 *
1334 * allocate a buffer and set the given audio format.
1335 *
1336 * so far we use a physically linear buffer although packetize transfer
1337 * doesn't need a continuous area.
1338 * if sg buffer is supported on the later version of alsa, we'll follow
1339 * that.
1340 */
1341 static int snd_usb_hw_params(snd_pcm_substream_t *substream,
1342 snd_pcm_hw_params_t *hw_params)
1343 {
1344 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1345 struct audioformat *fmt;
1346 unsigned int channels, rate, format;
1347 int ret, changed;
1348
1349 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1350 params_buffer_bytes(hw_params));
1351 if (ret < 0)
1352 return ret;
1353
1354 format = params_format(hw_params);
1355 rate = params_rate(hw_params);
1356 channels = params_channels(hw_params);
1357 fmt = find_format(subs, format, rate, channels);
1358 if (! fmt) {
1359 snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
1360 snd_pcm_format_name(format), rate, channels);
1361 return -EINVAL;
1362 }
1363
1364 changed = subs->cur_audiofmt != fmt ||
1365 subs->period_bytes != params_period_bytes(hw_params) ||
1366 subs->cur_rate != rate;
1367 if ((ret = set_format(subs, fmt)) < 0)
1368 return ret;
1369
1370 if (subs->cur_rate != rate) {
1371 struct usb_host_interface *alts;
1372 struct usb_interface *iface;
1373 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1374 alts = &iface->altsetting[fmt->altset_idx];
1375 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1376 if (ret < 0)
1377 return ret;
1378 subs->cur_rate = rate;
1379 }
1380
1381 if (changed) {
1382 /* format changed */
1383 release_substream_urbs(subs, 0);
1384 /* influenced: period_bytes, channels, rate, format, */
1385 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1386 params_rate(hw_params),
1387 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1388 }
1389
1390 return ret;
1391 }
1392
1393 /*
1394 * hw_free callback
1395 *
1396 * reset the audio format and release the buffer
1397 */
1398 static int snd_usb_hw_free(snd_pcm_substream_t *substream)
1399 {
1400 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1401
1402 subs->cur_audiofmt = NULL;
1403 subs->cur_rate = 0;
1404 subs->period_bytes = 0;
1405 release_substream_urbs(subs, 0);
1406 return snd_pcm_free_vmalloc_buffer(substream);
1407 }
1408
1409 /*
1410 * prepare callback
1411 *
1412 * only a few subtle things...
1413 */
1414 static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
1415 {
1416 snd_pcm_runtime_t *runtime = substream->runtime;
1417 snd_usb_substream_t *subs = (snd_usb_substream_t *)runtime->private_data;
1418
1419 if (! subs->cur_audiofmt) {
1420 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1421 return -ENXIO;
1422 }
1423
1424 /* some unit conversions in runtime */
1425 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1426 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1427
1428 /* reset the pointer */
1429 subs->hwptr_done = 0;
1430 subs->transfer_done = 0;
1431 subs->phase = 0;
1432
1433 /* clear urbs (to be sure) */
1434 deactivate_urbs(subs, 0, 1);
1435 wait_clear_urbs(subs);
1436
1437 return 0;
1438 }
1439
1440 static snd_pcm_hardware_t snd_usb_playback =
1441 {
1442 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1443 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1444 SNDRV_PCM_INFO_MMAP_VALID),
1445 .buffer_bytes_max = (256*1024),
1446 .period_bytes_min = 64,
1447 .period_bytes_max = (128*1024),
1448 .periods_min = 2,
1449 .periods_max = 1024,
1450 };
1451
1452 static snd_pcm_hardware_t snd_usb_capture =
1453 {
1454 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1455 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1456 SNDRV_PCM_INFO_MMAP_VALID),
1457 .buffer_bytes_max = (256*1024),
1458 .period_bytes_min = 64,
1459 .period_bytes_max = (128*1024),
1460 .periods_min = 2,
1461 .periods_max = 1024,
1462 };
1463
1464 /*
1465 * h/w constraints
1466 */
1467
1468 #ifdef HW_CONST_DEBUG
1469 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1470 #else
1471 #define hwc_debug(fmt, args...) /**/
1472 #endif
1473
1474 static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp)
1475 {
1476 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1477 snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1478 snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1479
1480 /* check the format */
1481 if (! snd_mask_test(fmts, fp->format)) {
1482 hwc_debug(" > check: no supported format %d\n", fp->format);
1483 return 0;
1484 }
1485 /* check the channels */
1486 if (fp->channels < ct->min || fp->channels > ct->max) {
1487 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1488 return 0;
1489 }
1490 /* check the rate is within the range */
1491 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1492 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1493 return 0;
1494 }
1495 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1496 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1497 return 0;
1498 }
1499 return 1;
1500 }
1501
1502 static int hw_rule_rate(snd_pcm_hw_params_t *params,
1503 snd_pcm_hw_rule_t *rule)
1504 {
1505 snd_usb_substream_t *subs = rule->private;
1506 struct list_head *p;
1507 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1508 unsigned int rmin, rmax;
1509 int changed;
1510
1511 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1512 changed = 0;
1513 rmin = rmax = 0;
1514 list_for_each(p, &subs->fmt_list) {
1515 struct audioformat *fp;
1516 fp = list_entry(p, struct audioformat, list);
1517 if (! hw_check_valid_format(params, fp))
1518 continue;
1519 if (changed++) {
1520 if (rmin > fp->rate_min)
1521 rmin = fp->rate_min;
1522 if (rmax < fp->rate_max)
1523 rmax = fp->rate_max;
1524 } else {
1525 rmin = fp->rate_min;
1526 rmax = fp->rate_max;
1527 }
1528 }
1529
1530 if (! changed) {
1531 hwc_debug(" --> get empty\n");
1532 it->empty = 1;
1533 return -EINVAL;
1534 }
1535
1536 changed = 0;
1537 if (it->min < rmin) {
1538 it->min = rmin;
1539 it->openmin = 0;
1540 changed = 1;
1541 }
1542 if (it->max > rmax) {
1543 it->max = rmax;
1544 it->openmax = 0;
1545 changed = 1;
1546 }
1547 if (snd_interval_checkempty(it)) {
1548 it->empty = 1;
1549 return -EINVAL;
1550 }
1551 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1552 return changed;
1553 }
1554
1555
1556 static int hw_rule_channels(snd_pcm_hw_params_t *params,
1557 snd_pcm_hw_rule_t *rule)
1558 {
1559 snd_usb_substream_t *subs = rule->private;
1560 struct list_head *p;
1561 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1562 unsigned int rmin, rmax;
1563 int changed;
1564
1565 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1566 changed = 0;
1567 rmin = rmax = 0;
1568 list_for_each(p, &subs->fmt_list) {
1569 struct audioformat *fp;
1570 fp = list_entry(p, struct audioformat, list);
1571 if (! hw_check_valid_format(params, fp))
1572 continue;
1573 if (changed++) {
1574 if (rmin > fp->channels)
1575 rmin = fp->channels;
1576 if (rmax < fp->channels)
1577 rmax = fp->channels;
1578 } else {
1579 rmin = fp->channels;
1580 rmax = fp->channels;
1581 }
1582 }
1583
1584 if (! changed) {
1585 hwc_debug(" --> get empty\n");
1586 it->empty = 1;
1587 return -EINVAL;
1588 }
1589
1590 changed = 0;
1591 if (it->min < rmin) {
1592 it->min = rmin;
1593 it->openmin = 0;
1594 changed = 1;
1595 }
1596 if (it->max > rmax) {
1597 it->max = rmax;
1598 it->openmax = 0;
1599 changed = 1;
1600 }
1601 if (snd_interval_checkempty(it)) {
1602 it->empty = 1;
1603 return -EINVAL;
1604 }
1605 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1606 return changed;
1607 }
1608
1609 static int hw_rule_format(snd_pcm_hw_params_t *params,
1610 snd_pcm_hw_rule_t *rule)
1611 {
1612 snd_usb_substream_t *subs = rule->private;
1613 struct list_head *p;
1614 snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1615 u64 fbits;
1616 u32 oldbits[2];
1617 int changed;
1618
1619 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1620 fbits = 0;
1621 list_for_each(p, &subs->fmt_list) {
1622 struct audioformat *fp;
1623 fp = list_entry(p, struct audioformat, list);
1624 if (! hw_check_valid_format(params, fp))
1625 continue;
1626 fbits |= (1ULL << fp->format);
1627 }
1628
1629 oldbits[0] = fmt->bits[0];
1630 oldbits[1] = fmt->bits[1];
1631 fmt->bits[0] &= (u32)fbits;
1632 fmt->bits[1] &= (u32)(fbits >> 32);
1633 if (! fmt->bits[0] && ! fmt->bits[1]) {
1634 hwc_debug(" --> get empty\n");
1635 return -EINVAL;
1636 }
1637 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1638 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1639 return changed;
1640 }
1641
1642 #define MAX_MASK 64
1643
1644 /*
1645 * check whether the registered audio formats need special hw-constraints
1646 */
1647 static int check_hw_params_convention(snd_usb_substream_t *subs)
1648 {
1649 int i;
1650 u32 *channels;
1651 u32 *rates;
1652 u32 cmaster, rmaster;
1653 u32 rate_min = 0, rate_max = 0;
1654 struct list_head *p;
1655 int err = 1;
1656
1657 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1658 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1659
1660 list_for_each(p, &subs->fmt_list) {
1661 struct audioformat *f;
1662 f = list_entry(p, struct audioformat, list);
1663 /* unconventional channels? */
1664 if (f->channels > 32)
1665 goto __out;
1666 /* continuous rate min/max matches? */
1667 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1668 if (rate_min && f->rate_min != rate_min)
1669 goto __out;
1670 if (rate_max && f->rate_max != rate_max)
1671 goto __out;
1672 rate_min = f->rate_min;
1673 rate_max = f->rate_max;
1674 }
1675 /* combination of continuous rates and fixed rates? */
1676 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1677 if (f->rates != rates[f->format])
1678 goto __out;
1679 }
1680 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1681 if (rates[f->format] && rates[f->format] != f->rates)
1682 goto __out;
1683 }
1684 channels[f->format] |= (1 << f->channels);
1685 rates[f->format] |= f->rates;
1686 }
1687 /* check whether channels and rates match for all formats */
1688 cmaster = rmaster = 0;
1689 for (i = 0; i < MAX_MASK; i++) {
1690 if (cmaster != channels[i] && cmaster && channels[i])
1691 goto __out;
1692 if (rmaster != rates[i] && rmaster && rates[i])
1693 goto __out;
1694 if (channels[i])
1695 cmaster = channels[i];
1696 if (rates[i])
1697 rmaster = rates[i];
1698 }
1699 /* check whether channels match for all distinct rates */
1700 memset(channels, 0, MAX_MASK * sizeof(u32));
1701 list_for_each(p, &subs->fmt_list) {
1702 struct audioformat *f;
1703 f = list_entry(p, struct audioformat, list);
1704 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1705 continue;
1706 for (i = 0; i < 32; i++) {
1707 if (f->rates & (1 << i))
1708 channels[i] |= (1 << f->channels);
1709 }
1710 }
1711 cmaster = 0;
1712 for (i = 0; i < 32; i++) {
1713 if (cmaster != channels[i] && cmaster && channels[i])
1714 goto __out;
1715 if (channels[i])
1716 cmaster = channels[i];
1717 }
1718 err = 0;
1719
1720 __out:
1721 kfree(channels);
1722 kfree(rates);
1723 return err;
1724 }
1725
1726
1727 /*
1728 * set up the runtime hardware information.
1729 */
1730
1731 static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
1732 {
1733 struct list_head *p;
1734 int err;
1735
1736 runtime->hw.formats = subs->formats;
1737
1738 runtime->hw.rate_min = 0x7fffffff;
1739 runtime->hw.rate_max = 0;
1740 runtime->hw.channels_min = 256;
1741 runtime->hw.channels_max = 0;
1742 runtime->hw.rates = 0;
1743 /* check min/max rates and channels */
1744 list_for_each(p, &subs->fmt_list) {
1745 struct audioformat *fp;
1746 fp = list_entry(p, struct audioformat, list);
1747 runtime->hw.rates |= fp->rates;
1748 if (runtime->hw.rate_min > fp->rate_min)
1749 runtime->hw.rate_min = fp->rate_min;
1750 if (runtime->hw.rate_max < fp->rate_max)
1751 runtime->hw.rate_max = fp->rate_max;
1752 if (runtime->hw.channels_min > fp->channels)
1753 runtime->hw.channels_min = fp->channels;
1754 if (runtime->hw.channels_max < fp->channels)
1755 runtime->hw.channels_max = fp->channels;
1756 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1757 /* FIXME: there might be more than one audio formats... */
1758 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1759 fp->frame_size;
1760 }
1761 }
1762
1763 /* set the period time minimum 1ms */
1764 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1765 1000 * MIN_PACKS_URB,
1766 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1767
1768 if (check_hw_params_convention(subs)) {
1769 hwc_debug("setting extra hw constraints...\n");
1770 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1771 hw_rule_rate, subs,
1772 SNDRV_PCM_HW_PARAM_FORMAT,
1773 SNDRV_PCM_HW_PARAM_CHANNELS,
1774 -1)) < 0)
1775 return err;
1776 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1777 hw_rule_channels, subs,
1778 SNDRV_PCM_HW_PARAM_FORMAT,
1779 SNDRV_PCM_HW_PARAM_RATE,
1780 -1)) < 0)
1781 return err;
1782 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1783 hw_rule_format, subs,
1784 SNDRV_PCM_HW_PARAM_RATE,
1785 SNDRV_PCM_HW_PARAM_CHANNELS,
1786 -1)) < 0)
1787 return err;
1788 }
1789 return 0;
1790 }
1791
1792 static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
1793 snd_pcm_hardware_t *hw)
1794 {
1795 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1796 snd_pcm_runtime_t *runtime = substream->runtime;
1797 snd_usb_substream_t *subs = &as->substream[direction];
1798
1799 subs->interface = -1;
1800 subs->format = 0;
1801 runtime->hw = *hw;
1802 runtime->private_data = subs;
1803 subs->pcm_substream = substream;
1804 return setup_hw_info(runtime, subs);
1805 }
1806
1807 static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
1808 {
1809 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1810 snd_usb_substream_t *subs = &as->substream[direction];
1811
1812 if (subs->interface >= 0) {
1813 usb_set_interface(subs->dev, subs->interface, 0);
1814 subs->interface = -1;
1815 }
1816 subs->pcm_substream = NULL;
1817 return 0;
1818 }
1819
1820 static int snd_usb_playback_open(snd_pcm_substream_t *substream)
1821 {
1822 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1823 }
1824
1825 static int snd_usb_playback_close(snd_pcm_substream_t *substream)
1826 {
1827 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1828 }
1829
1830 static int snd_usb_capture_open(snd_pcm_substream_t *substream)
1831 {
1832 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1833 }
1834
1835 static int snd_usb_capture_close(snd_pcm_substream_t *substream)
1836 {
1837 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1838 }
1839
1840 static snd_pcm_ops_t snd_usb_playback_ops = {
1841 .open = snd_usb_playback_open,
1842 .close = snd_usb_playback_close,
1843 .ioctl = snd_pcm_lib_ioctl,
1844 .hw_params = snd_usb_hw_params,
1845 .hw_free = snd_usb_hw_free,
1846 .prepare = snd_usb_pcm_prepare,
1847 .trigger = snd_usb_pcm_trigger,
1848 .pointer = snd_usb_pcm_pointer,
1849 .page = snd_pcm_get_vmalloc_page,
1850 };
1851
1852 static snd_pcm_ops_t snd_usb_capture_ops = {
1853 .open = snd_usb_capture_open,
1854 .close = snd_usb_capture_close,
1855 .ioctl = snd_pcm_lib_ioctl,
1856 .hw_params = snd_usb_hw_params,
1857 .hw_free = snd_usb_hw_free,
1858 .prepare = snd_usb_pcm_prepare,
1859 .trigger = snd_usb_pcm_trigger,
1860 .pointer = snd_usb_pcm_pointer,
1861 .page = snd_pcm_get_vmalloc_page,
1862 };
1863
1864
1865
1866 /*
1867 * helper functions
1868 */
1869
1870 /*
1871 * combine bytes and get an integer value
1872 */
1873 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1874 {
1875 switch (size) {
1876 case 1: return *bytes;
1877 case 2: return combine_word(bytes);
1878 case 3: return combine_triple(bytes);
1879 case 4: return combine_quad(bytes);
1880 default: return 0;
1881 }
1882 }
1883
1884 /*
1885 * parse descriptor buffer and return the pointer starting the given
1886 * descriptor type.
1887 */
1888 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1889 {
1890 u8 *p, *end, *next;
1891
1892 p = descstart;
1893 end = p + desclen;
1894 for (; p < end;) {
1895 if (p[0] < 2)
1896 return NULL;
1897 next = p + p[0];
1898 if (next > end)
1899 return NULL;
1900 if (p[1] == dtype && (!after || (void *)p > after)) {
1901 return p;
1902 }
1903 p = next;
1904 }
1905 return NULL;
1906 }
1907
1908 /*
1909 * find a class-specified interface descriptor with the given subtype.
1910 */
1911 void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1912 {
1913 unsigned char *p = after;
1914
1915 while ((p = snd_usb_find_desc(buffer, buflen, p,
1916 USB_DT_CS_INTERFACE)) != NULL) {
1917 if (p[0] >= 3 && p[2] == dsubtype)
1918 return p;
1919 }
1920 return NULL;
1921 }
1922
1923 /*
1924 * Wrapper for usb_control_msg().
1925 * Allocates a temp buffer to prevent dmaing from/to the stack.
1926 */
1927 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1928 __u8 requesttype, __u16 value, __u16 index, void *data,
1929 __u16 size, int timeout)
1930 {
1931 int err;
1932 void *buf = NULL;
1933
1934 if (size > 0) {
1935 buf = kmalloc(size, GFP_KERNEL);
1936 if (!buf)
1937 return -ENOMEM;
1938 memcpy(buf, data, size);
1939 }
1940 err = usb_control_msg(dev, pipe, request, requesttype,
1941 value, index, buf, size, timeout);
1942 if (size > 0) {
1943 memcpy(data, buf, size);
1944 kfree(buf);
1945 }
1946 return err;
1947 }
1948
1949
1950 /*
1951 * entry point for linux usb interface
1952 */
1953
1954 static int usb_audio_probe(struct usb_interface *intf,
1955 const struct usb_device_id *id);
1956 static void usb_audio_disconnect(struct usb_interface *intf);
1957
1958 static struct usb_device_id usb_audio_ids [] = {
1959 #include "usbquirks.h"
1960 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1961 .bInterfaceClass = USB_CLASS_AUDIO,
1962 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
1963 { } /* Terminating entry */
1964 };
1965
1966 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
1967
1968 static struct usb_driver usb_audio_driver = {
1969 .owner = THIS_MODULE,
1970 .name = "snd-usb-audio",
1971 .probe = usb_audio_probe,
1972 .disconnect = usb_audio_disconnect,
1973 .id_table = usb_audio_ids,
1974 };
1975
1976
1977 /*
1978 * proc interface for list the supported pcm formats
1979 */
1980 static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
1981 {
1982 struct list_head *p;
1983 static char *sync_types[4] = {
1984 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
1985 };
1986
1987 list_for_each(p, &subs->fmt_list) {
1988 struct audioformat *fp;
1989 fp = list_entry(p, struct audioformat, list);
1990 snd_iprintf(buffer, " Interface %d\n", fp->iface);
1991 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
1992 snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
1993 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
1994 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
1995 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
1996 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
1997 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
1998 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1999 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2000 fp->rate_min, fp->rate_max);
2001 } else {
2002 unsigned int i;
2003 snd_iprintf(buffer, " Rates: ");
2004 for (i = 0; i < fp->nr_rates; i++) {
2005 if (i > 0)
2006 snd_iprintf(buffer, ", ");
2007 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2008 }
2009 snd_iprintf(buffer, "\n");
2010 }
2011 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2012 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2013 }
2014 }
2015
2016 static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
2017 {
2018 if (subs->running) {
2019 unsigned int i;
2020 snd_iprintf(buffer, " Status: Running\n");
2021 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2022 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2023 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2024 for (i = 0; i < subs->nurbs; i++)
2025 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2026 snd_iprintf(buffer, "]\n");
2027 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
2028 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
2029 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2030 ? get_full_speed_hz(subs->freqm)
2031 : get_high_speed_hz(subs->freqm),
2032 subs->freqm >> 16, subs->freqm & 0xffff);
2033 } else {
2034 snd_iprintf(buffer, " Status: Stop\n");
2035 }
2036 }
2037
2038 static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
2039 {
2040 snd_usb_stream_t *stream = entry->private_data;
2041
2042 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2043
2044 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2045 snd_iprintf(buffer, "\nPlayback:\n");
2046 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2047 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2048 }
2049 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2050 snd_iprintf(buffer, "\nCapture:\n");
2051 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2052 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2053 }
2054 }
2055
2056 static void proc_pcm_format_add(snd_usb_stream_t *stream)
2057 {
2058 snd_info_entry_t *entry;
2059 char name[32];
2060 snd_card_t *card = stream->chip->card;
2061
2062 sprintf(name, "stream%d", stream->pcm_index);
2063 if (! snd_card_proc_new(card, name, &entry))
2064 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2065 }
2066
2067
2068 /*
2069 * initialize the substream instance.
2070 */
2071
2072 static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp)
2073 {
2074 snd_usb_substream_t *subs = &as->substream[stream];
2075
2076 INIT_LIST_HEAD(&subs->fmt_list);
2077 spin_lock_init(&subs->lock);
2078 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2079 tasklet_init(&subs->start_period_elapsed, start_period_elapsed,
2080 (unsigned long)subs);
2081
2082 subs->stream = as;
2083 subs->direction = stream;
2084 subs->dev = as->chip->dev;
2085 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2086 subs->ops = audio_urb_ops[stream];
2087 else
2088 subs->ops = audio_urb_ops_high_speed[stream];
2089 snd_pcm_set_ops(as->pcm, stream,
2090 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2091 &snd_usb_playback_ops : &snd_usb_capture_ops);
2092
2093 list_add_tail(&fp->list, &subs->fmt_list);
2094 subs->formats |= 1ULL << fp->format;
2095 subs->endpoint = fp->endpoint;
2096 subs->num_formats++;
2097 subs->fmt_type = fp->fmt_type;
2098 }
2099
2100
2101 /*
2102 * free a substream
2103 */
2104 static void free_substream(snd_usb_substream_t *subs)
2105 {
2106 struct list_head *p, *n;
2107
2108 if (! subs->num_formats)
2109 return; /* not initialized */
2110 list_for_each_safe(p, n, &subs->fmt_list) {
2111 struct audioformat *fp = list_entry(p, struct audioformat, list);
2112 kfree(fp->rate_table);
2113 kfree(fp);
2114 }
2115 }
2116
2117
2118 /*
2119 * free a usb stream instance
2120 */
2121 static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
2122 {
2123 free_substream(&stream->substream[0]);
2124 free_substream(&stream->substream[1]);
2125 list_del(&stream->list);
2126 kfree(stream);
2127 }
2128
2129 static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
2130 {
2131 snd_usb_stream_t *stream = pcm->private_data;
2132 if (stream) {
2133 stream->pcm = NULL;
2134 snd_usb_audio_stream_free(stream);
2135 }
2136 }
2137
2138
2139 /*
2140 * add this endpoint to the chip instance.
2141 * if a stream with the same endpoint already exists, append to it.
2142 * if not, create a new pcm stream.
2143 */
2144 static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp)
2145 {
2146 struct list_head *p;
2147 snd_usb_stream_t *as;
2148 snd_usb_substream_t *subs;
2149 snd_pcm_t *pcm;
2150 int err;
2151
2152 list_for_each(p, &chip->pcm_list) {
2153 as = list_entry(p, snd_usb_stream_t, list);
2154 if (as->fmt_type != fp->fmt_type)
2155 continue;
2156 subs = &as->substream[stream];
2157 if (! subs->endpoint)
2158 continue;
2159 if (subs->endpoint == fp->endpoint) {
2160 list_add_tail(&fp->list, &subs->fmt_list);
2161 subs->num_formats++;
2162 subs->formats |= 1ULL << fp->format;
2163 return 0;
2164 }
2165 }
2166 /* look for an empty stream */
2167 list_for_each(p, &chip->pcm_list) {
2168 as = list_entry(p, snd_usb_stream_t, list);
2169 if (as->fmt_type != fp->fmt_type)
2170 continue;
2171 subs = &as->substream[stream];
2172 if (subs->endpoint)
2173 continue;
2174 err = snd_pcm_new_stream(as->pcm, stream, 1);
2175 if (err < 0)
2176 return err;
2177 init_substream(as, stream, fp);
2178 return 0;
2179 }
2180
2181 /* create a new pcm */
2182 as = kmalloc(sizeof(*as), GFP_KERNEL);
2183 if (! as)
2184 return -ENOMEM;
2185 memset(as, 0, sizeof(*as));
2186 as->pcm_index = chip->pcm_devs;
2187 as->chip = chip;
2188 as->fmt_type = fp->fmt_type;
2189 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2190 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2191 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2192 &pcm);
2193 if (err < 0) {
2194 kfree(as);
2195 return err;
2196 }
2197 as->pcm = pcm;
2198 pcm->private_data = as;
2199 pcm->private_free = snd_usb_audio_pcm_free;
2200 pcm->info_flags = 0;
2201 if (chip->pcm_devs > 0)
2202 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2203 else
2204 strcpy(pcm->name, "USB Audio");
2205
2206 init_substream(as, stream, fp);
2207
2208 list_add(&as->list, &chip->pcm_list);
2209 chip->pcm_devs++;
2210
2211 proc_pcm_format_add(as);
2212
2213 return 0;
2214 }
2215
2216
2217 /*
2218 * check if the device uses big-endian samples
2219 */
2220 static int is_big_endian_format(snd_usb_audio_t *chip, struct audioformat *fp)
2221 {
2222 switch (chip->usb_id) {
2223 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2224 if (fp->endpoint & USB_DIR_IN)
2225 return 1;
2226 break;
2227 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2228 return 1;
2229 }
2230 return 0;
2231 }
2232
2233 /*
2234 * parse the audio format type I descriptor
2235 * and returns the corresponding pcm format
2236 *
2237 * @dev: usb device
2238 * @fp: audioformat record
2239 * @format: the format tag (wFormatTag)
2240 * @fmt: the format type descriptor
2241 */
2242 static int parse_audio_format_i_type(snd_usb_audio_t *chip, struct audioformat *fp,
2243 int format, unsigned char *fmt)
2244 {
2245 int pcm_format;
2246 int sample_width, sample_bytes;
2247
2248 /* FIXME: correct endianess and sign? */
2249 pcm_format = -1;
2250 sample_width = fmt[6];
2251 sample_bytes = fmt[5];
2252 switch (format) {
2253 case 0: /* some devices don't define this correctly... */
2254 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
2255 chip->dev->devnum, fp->iface, fp->altsetting);
2256 /* fall-through */
2257 case USB_AUDIO_FORMAT_PCM:
2258 if (sample_width > sample_bytes * 8) {
2259 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2260 chip->dev->devnum, fp->iface, fp->altsetting,
2261 sample_width, sample_bytes);
2262 }
2263 /* check the format byte size */
2264 switch (fmt[5]) {
2265 case 1:
2266 pcm_format = SNDRV_PCM_FORMAT_S8;
2267 break;
2268 case 2:
2269 if (is_big_endian_format(chip, fp))
2270 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2271 else
2272 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2273 break;
2274 case 3:
2275 if (is_big_endian_format(chip, fp))
2276 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2277 else
2278 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2279 break;
2280 case 4:
2281 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2282 break;
2283 default:
2284 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2285 chip->dev->devnum, fp->iface,
2286 fp->altsetting, sample_width, sample_bytes);
2287 break;
2288 }
2289 break;
2290 case USB_AUDIO_FORMAT_PCM8:
2291 /* Dallas DS4201 workaround */
2292 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
2293 pcm_format = SNDRV_PCM_FORMAT_S8;
2294 else
2295 pcm_format = SNDRV_PCM_FORMAT_U8;
2296 break;
2297 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2298 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2299 break;
2300 case USB_AUDIO_FORMAT_ALAW:
2301 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2302 break;
2303 case USB_AUDIO_FORMAT_MU_LAW:
2304 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2305 break;
2306 default:
2307 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
2308 chip->dev->devnum, fp->iface, fp->altsetting, format);
2309 break;
2310 }
2311 return pcm_format;
2312 }
2313
2314
2315 /*
2316 * parse the format descriptor and stores the possible sample rates
2317 * on the audioformat table.
2318 *
2319 * @dev: usb device
2320 * @fp: audioformat record
2321 * @fmt: the format descriptor
2322 * @offset: the start offset of descriptor pointing the rate type
2323 * (7 for type I and II, 8 for type II)
2324 */
2325 static int parse_audio_format_rates(snd_usb_audio_t *chip, struct audioformat *fp,
2326 unsigned char *fmt, int offset)
2327 {
2328 int nr_rates = fmt[offset];
2329 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2330 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2331 chip->dev->devnum, fp->iface, fp->altsetting);
2332 return -1;
2333 }
2334
2335 if (nr_rates) {
2336 /*
2337 * build the rate table and bitmap flags
2338 */
2339 int r, idx, c;
2340 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2341 static unsigned int conv_rates[] = {
2342 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2343 64000, 88200, 96000, 176400, 192000
2344 };
2345 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2346 if (fp->rate_table == NULL) {
2347 snd_printk(KERN_ERR "cannot malloc\n");
2348 return -1;
2349 }
2350
2351 fp->nr_rates = nr_rates;
2352 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2353 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2354 unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2355 if (rate < fp->rate_min)
2356 fp->rate_min = rate;
2357 else if (rate > fp->rate_max)
2358 fp->rate_max = rate;
2359 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2360 if (rate == conv_rates[c]) {
2361 fp->rates |= (1 << c);
2362 break;
2363 }
2364 }
2365 }
2366 } else {
2367 /* continuous rates */
2368 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2369 fp->rate_min = combine_triple(&fmt[offset + 1]);
2370 fp->rate_max = combine_triple(&fmt[offset + 4]);
2371 }
2372 return 0;
2373 }
2374
2375 /*
2376 * parse the format type I and III descriptors
2377 */
2378 static int parse_audio_format_i(snd_usb_audio_t *chip, struct audioformat *fp,
2379 int format, unsigned char *fmt)
2380 {
2381 int pcm_format;
2382
2383 if (fmt[3] == USB_FORMAT_TYPE_III) {
2384 /* FIXME: the format type is really IECxxx
2385 * but we give normal PCM format to get the existing
2386 * apps working...
2387 */
2388 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2389 } else {
2390 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
2391 if (pcm_format < 0)
2392 return -1;
2393 }
2394 fp->format = pcm_format;
2395 fp->channels = fmt[4];
2396 if (fp->channels < 1) {
2397 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
2398 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
2399 return -1;
2400 }
2401 return parse_audio_format_rates(chip, fp, fmt, 7);
2402 }
2403
2404 /*
2405 * prase the format type II descriptor
2406 */
2407 static int parse_audio_format_ii(snd_usb_audio_t *chip, struct audioformat *fp,
2408 int format, unsigned char *fmt)
2409 {
2410 int brate, framesize;
2411 switch (format) {
2412 case USB_AUDIO_FORMAT_AC3:
2413 /* FIXME: there is no AC3 format defined yet */
2414 // fp->format = SNDRV_PCM_FORMAT_AC3;
2415 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2416 break;
2417 case USB_AUDIO_FORMAT_MPEG:
2418 fp->format = SNDRV_PCM_FORMAT_MPEG;
2419 break;
2420 default:
2421 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
2422 chip->dev->devnum, fp->iface, fp->altsetting, format);
2423 fp->format = SNDRV_PCM_FORMAT_MPEG;
2424 break;
2425 }
2426 fp->channels = 1;
2427 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2428 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2429 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2430 fp->frame_size = framesize;
2431 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
2432 }
2433
2434 static int parse_audio_format(snd_usb_audio_t *chip, struct audioformat *fp,
2435 int format, unsigned char *fmt, int stream)
2436 {
2437 int err;
2438
2439 switch (fmt[3]) {
2440 case USB_FORMAT_TYPE_I:
2441 case USB_FORMAT_TYPE_III:
2442 err = parse_audio_format_i(chip, fp, format, fmt);
2443 break;
2444 case USB_FORMAT_TYPE_II:
2445 err = parse_audio_format_ii(chip, fp, format, fmt);
2446 break;
2447 default:
2448 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
2449 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
2450 return -1;
2451 }
2452 fp->fmt_type = fmt[3];
2453 if (err < 0)
2454 return err;
2455 #if 1
2456 /* FIXME: temporary hack for extigy/audigy 2 nx */
2457 /* extigy apparently supports sample rates other than 48k
2458 * but not in ordinary way. so we enable only 48k atm.
2459 */
2460 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2461 chip->usb_id == USB_ID(0x041e, 0x3020)) {
2462 if (fmt[3] == USB_FORMAT_TYPE_I &&
2463 fp->rates != SNDRV_PCM_RATE_48000 &&
2464 fp->rates != SNDRV_PCM_RATE_96000)
2465 return -1;
2466 }
2467 #endif
2468 return 0;
2469 }
2470
2471 static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
2472 {
2473 struct usb_device *dev;
2474 struct usb_interface *iface;
2475 struct usb_host_interface *alts;
2476 struct usb_interface_descriptor *altsd;
2477 int i, altno, err, stream;
2478 int format;
2479 struct audioformat *fp;
2480 unsigned char *fmt, *csep;
2481
2482 dev = chip->dev;
2483
2484 /* parse the interface's altsettings */
2485 iface = usb_ifnum_to_if(dev, iface_no);
2486 for (i = 0; i < iface->num_altsetting; i++) {
2487 alts = &iface->altsetting[i];
2488 altsd = get_iface_desc(alts);
2489 /* skip invalid one */
2490 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2491 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2492 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2493 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2494 altsd->bNumEndpoints < 1 ||
2495 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2496 continue;
2497 /* must be isochronous */
2498 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2499 USB_ENDPOINT_XFER_ISOC)
2500 continue;
2501 /* check direction */
2502 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2503 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2504 altno = altsd->bAlternateSetting;
2505
2506 /* get audio formats */
2507 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2508 if (!fmt) {
2509 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2510 dev->devnum, iface_no, altno);
2511 continue;
2512 }
2513
2514 if (fmt[0] < 7) {
2515 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2516 dev->devnum, iface_no, altno);
2517 continue;
2518 }
2519
2520 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2521
2522 /* get format type */
2523 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2524 if (!fmt) {
2525 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2526 dev->devnum, iface_no, altno);
2527 continue;
2528 }
2529 if (fmt[0] < 8) {
2530 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2531 dev->devnum, iface_no, altno);
2532 continue;
2533 }
2534
2535 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2536 /* Creamware Noah has this descriptor after the 2nd endpoint */
2537 if (!csep && altsd->bNumEndpoints >= 2)
2538 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2539 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2540 snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2541 dev->devnum, iface_no, altno);
2542 continue;
2543 }
2544
2545 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2546 if (! fp) {
2547 snd_printk(KERN_ERR "cannot malloc\n");
2548 return -ENOMEM;
2549 }
2550
2551 memset(fp, 0, sizeof(*fp));
2552 fp->iface = iface_no;
2553 fp->altsetting = altno;
2554 fp->altset_idx = i;
2555 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2556 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2557 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2558 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2559 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2560 * (fp->maxpacksize & 0x7ff);
2561 fp->attributes = csep[3];
2562
2563 /* some quirks for attributes here */
2564
2565 switch (chip->usb_id) {
2566 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2567 /* Optoplay sets the sample rate attribute although
2568 * it seems not supporting it in fact.
2569 */
2570 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
2571 break;
2572 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2573 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2574 /* doesn't set the sample rate attribute, but supports it */
2575 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
2576 break;
2577 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2578 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2579 an older model 77d:223) */
2580 /*
2581 * plantronics headset and Griffin iMic have set adaptive-in
2582 * although it's really not...
2583 */
2584 fp->ep_attr &= ~EP_ATTR_MASK;
2585 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2586 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2587 else
2588 fp->ep_attr |= EP_ATTR_SYNC;
2589 break;
2590 }
2591
2592 /* ok, let's parse further... */
2593 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
2594 kfree(fp->rate_table);
2595 kfree(fp);
2596 continue;
2597 }
2598
2599 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2600 err = add_audio_endpoint(chip, stream, fp);
2601 if (err < 0) {
2602 kfree(fp->rate_table);
2603 kfree(fp);
2604 return err;
2605 }
2606 /* try to set the interface... */
2607 usb_set_interface(chip->dev, iface_no, altno);
2608 init_usb_pitch(chip->dev, iface_no, alts, fp);
2609 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2610 }
2611 return 0;
2612 }
2613
2614
2615 /*
2616 * disconnect streams
2617 * called from snd_usb_audio_disconnect()
2618 */
2619 static void snd_usb_stream_disconnect(struct list_head *head)
2620 {
2621 int idx;
2622 snd_usb_stream_t *as;
2623 snd_usb_substream_t *subs;
2624
2625 as = list_entry(head, snd_usb_stream_t, list);
2626 for (idx = 0; idx < 2; idx++) {
2627 subs = &as->substream[idx];
2628 if (!subs->num_formats)
2629 return;
2630 release_substream_urbs(subs, 1);
2631 subs->interface = -1;
2632 }
2633 }
2634
2635 /*
2636 * parse audio control descriptor and create pcm/midi streams
2637 */
2638 static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
2639 {
2640 struct usb_device *dev = chip->dev;
2641 struct usb_host_interface *host_iface;
2642 struct usb_interface *iface;
2643 unsigned char *p1;
2644 int i, j;
2645
2646 /* find audiocontrol interface */
2647 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2648 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2649 snd_printk(KERN_ERR "cannot find HEADER\n");
2650 return -EINVAL;
2651 }
2652 if (! p1[7] || p1[0] < 8 + p1[7]) {
2653 snd_printk(KERN_ERR "invalid HEADER\n");
2654 return -EINVAL;
2655 }
2656
2657 /*
2658 * parse all USB audio streaming interfaces
2659 */
2660 for (i = 0; i < p1[7]; i++) {
2661 struct usb_host_interface *alts;
2662 struct usb_interface_descriptor *altsd;
2663 j = p1[8 + i];
2664 iface = usb_ifnum_to_if(dev, j);
2665 if (!iface) {
2666 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2667 dev->devnum, ctrlif, j);
2668 continue;
2669 }
2670 if (usb_interface_claimed(iface)) {
2671 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2672 continue;
2673 }
2674 alts = &iface->altsetting[0];
2675 altsd = get_iface_desc(alts);
2676 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2677 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2678 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2679 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2680 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2681 continue;
2682 }
2683 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2684 continue;
2685 }
2686 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2687 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2688 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2689 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2690 /* skip non-supported classes */
2691 continue;
2692 }
2693 if (! parse_audio_endpoints(chip, j)) {
2694 usb_set_interface(dev, j, 0); /* reset the current interface */
2695 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2696 }
2697 }
2698
2699 return 0;
2700 }
2701
2702 /*
2703 * create a stream for an endpoint/altsetting without proper descriptors
2704 */
2705 static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
2706 struct usb_interface *iface,
2707 const snd_usb_audio_quirk_t *quirk)
2708 {
2709 struct audioformat *fp;
2710 struct usb_host_interface *alts;
2711 int stream, err;
2712 int *rate_table = NULL;
2713
2714 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2715 if (! fp) {
2716 snd_printk(KERN_ERR "cannot malloc\n");
2717 return -ENOMEM;
2718 }
2719 memcpy(fp, quirk->data, sizeof(*fp));
2720 if (fp->nr_rates > 0) {
2721 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2722 if (!rate_table) {
2723 kfree(fp);
2724 return -ENOMEM;
2725 }
2726 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2727 fp->rate_table = rate_table;
2728 }
2729
2730 stream = (fp->endpoint & USB_DIR_IN)
2731 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2732 err = add_audio_endpoint(chip, stream, fp);
2733 if (err < 0) {
2734 kfree(fp);
2735 kfree(rate_table);
2736 return err;
2737 }
2738 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2739 fp->altset_idx >= iface->num_altsetting) {
2740 kfree(fp);
2741 kfree(rate_table);
2742 return -EINVAL;
2743 }
2744 alts = &iface->altsetting[fp->altset_idx];
2745 usb_set_interface(chip->dev, fp->iface, 0);
2746 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2747 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2748 return 0;
2749 }
2750
2751 /*
2752 * create a stream for an interface with proper descriptors
2753 */
2754 static int create_standard_interface_quirk(snd_usb_audio_t *chip,
2755 struct usb_interface *iface,
2756 const snd_usb_audio_quirk_t *quirk)
2757 {
2758 struct usb_host_interface *alts;
2759 struct usb_interface_descriptor *altsd;
2760 int err;
2761
2762 alts = &iface->altsetting[0];
2763 altsd = get_iface_desc(alts);
2764 switch (quirk->type) {
2765 case QUIRK_AUDIO_STANDARD_INTERFACE:
2766 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
2767 if (!err)
2768 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0); /* reset the current interface */
2769 break;
2770 case QUIRK_MIDI_STANDARD_INTERFACE:
2771 err = snd_usb_create_midi_interface(chip, iface, NULL);
2772 break;
2773 default:
2774 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
2775 return -ENXIO;
2776 }
2777 if (err < 0) {
2778 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2779 altsd->bInterfaceNumber, err);
2780 return err;
2781 }
2782 return 0;
2783 }
2784
2785 /*
2786 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2787 * to detect the sample rate is by looking at wMaxPacketSize.
2788 */
2789 static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
2790 struct usb_interface *iface,
2791 const snd_usb_audio_quirk_t *quirk)
2792 {
2793 static const struct audioformat ua_format = {
2794 .format = SNDRV_PCM_FORMAT_S24_3LE,
2795 .channels = 2,
2796 .fmt_type = USB_FORMAT_TYPE_I,
2797 .altsetting = 1,
2798 .altset_idx = 1,
2799 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2800 };
2801 struct usb_host_interface *alts;
2802 struct usb_interface_descriptor *altsd;
2803 struct audioformat *fp;
2804 int stream, err;
2805
2806 /* both PCM and MIDI interfaces have 2 altsettings */
2807 if (iface->num_altsetting != 2)
2808 return -ENXIO;
2809 alts = &iface->altsetting[1];
2810 altsd = get_iface_desc(alts);
2811
2812 if (altsd->bNumEndpoints == 2) {
2813 static const snd_usb_midi_endpoint_info_t ua700_ep = {
2814 .out_cables = 0x0003,
2815 .in_cables = 0x0003
2816 };
2817 static const snd_usb_audio_quirk_t ua700_quirk = {
2818 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2819 .data = &ua700_ep
2820 };
2821 static const snd_usb_midi_endpoint_info_t ua25_ep = {
2822 .out_cables = 0x0001,
2823 .in_cables = 0x0001
2824 };
2825 static const snd_usb_audio_quirk_t ua25_quirk = {
2826 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2827 .data = &ua25_ep
2828 };
2829 if (chip->usb_id == USB_ID(0x0582, 0x002b))
2830 return snd_usb_create_midi_interface(chip, iface,
2831 &ua700_quirk);
2832 else
2833 return snd_usb_create_midi_interface(chip, iface,
2834 &ua25_quirk);
2835 }
2836
2837 if (altsd->bNumEndpoints != 1)
2838 return -ENXIO;
2839
2840 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2841 if (!fp)
2842 return -ENOMEM;
2843 memcpy(fp, &ua_format, sizeof(*fp));
2844
2845 fp->iface = altsd->bInterfaceNumber;
2846 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2847 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2848 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2849
2850 switch (fp->maxpacksize) {
2851 case 0x120:
2852 fp->rate_max = fp->rate_min = 44100;
2853 break;
2854 case 0x138:
2855 case 0x140:
2856 fp->rate_max = fp->rate_min = 48000;
2857 break;
2858 case 0x258:
2859 case 0x260:
2860 fp->rate_max = fp->rate_min = 96000;
2861 break;
2862 default:
2863 snd_printk(KERN_ERR "unknown sample rate\n");
2864 kfree(fp);
2865 return -ENXIO;
2866 }
2867
2868 stream = (fp->endpoint & USB_DIR_IN)
2869 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2870 err = add_audio_endpoint(chip, stream, fp);
2871 if (err < 0) {
2872 kfree(fp);
2873 return err;
2874 }
2875 usb_set_interface(chip->dev, fp->iface, 0);
2876 return 0;
2877 }
2878
2879 /*
2880 * Create a stream for an Edirol UA-1000 interface.
2881 */
2882 static int create_ua1000_quirk(snd_usb_audio_t *chip,
2883 struct usb_interface *iface,
2884 const snd_usb_audio_quirk_t *quirk)
2885 {
2886 static const struct audioformat ua1000_format = {
2887 .format = SNDRV_PCM_FORMAT_S32_LE,
2888 .fmt_type = USB_FORMAT_TYPE_I,
2889 .altsetting = 1,
2890 .altset_idx = 1,
2891 .attributes = 0,
2892 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2893 };
2894 struct usb_host_interface *alts;
2895 struct usb_interface_descriptor *altsd;
2896 struct audioformat *fp;
2897 int stream, err;
2898
2899 if (iface->num_altsetting != 2)
2900 return -ENXIO;
2901 alts = &iface->altsetting[1];
2902 altsd = get_iface_desc(alts);
2903 if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2904 altsd->bNumEndpoints != 1)
2905 return -ENXIO;
2906
2907 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2908 if (!fp)
2909 return -ENOMEM;
2910 memcpy(fp, &ua1000_format, sizeof(*fp));
2911
2912 fp->channels = alts->extra[4];
2913 fp->iface = altsd->bInterfaceNumber;
2914 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2915 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2916 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2917 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2918
2919 stream = (fp->endpoint & USB_DIR_IN)
2920 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2921 err = add_audio_endpoint(chip, stream, fp);
2922 if (err < 0) {
2923 kfree(fp);
2924 return err;
2925 }
2926 /* FIXME: playback must be synchronized to capture */
2927 usb_set_interface(chip->dev, fp->iface, 0);
2928 return 0;
2929 }
2930
2931 static int snd_usb_create_quirk(snd_usb_audio_t *chip,
2932 struct usb_interface *iface,
2933 const snd_usb_audio_quirk_t *quirk);
2934
2935 /*
2936 * handle the quirks for the contained interfaces
2937 */
2938 static int create_composite_quirk(snd_usb_audio_t *chip,
2939 struct usb_interface *iface,
2940 const snd_usb_audio_quirk_t *quirk)
2941 {
2942 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2943 int err;
2944
2945 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2946 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2947 if (!iface)
2948 continue;
2949 if (quirk->ifnum != probed_ifnum &&
2950 usb_interface_claimed(iface))
2951 continue;
2952 err = snd_usb_create_quirk(chip, iface, quirk);
2953 if (err < 0)
2954 return err;
2955 if (quirk->ifnum != probed_ifnum)
2956 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2957 }
2958 return 0;
2959 }
2960
2961 static int ignore_interface_quirk(snd_usb_audio_t *chip,
2962 struct usb_interface *iface,
2963 const snd_usb_audio_quirk_t *quirk)
2964 {
2965 return 0;
2966 }
2967
2968
2969 /*
2970 * boot quirks
2971 */
2972
2973 #define EXTIGY_FIRMWARE_SIZE_OLD 794
2974 #define EXTIGY_FIRMWARE_SIZE_NEW 483
2975
2976 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
2977 {
2978 struct usb_host_config *config = dev->actconfig;
2979 int err;
2980
2981 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
2982 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
2983 snd_printdd("sending Extigy boot sequence...\n");
2984 /* Send message to force it to reconnect with full interface. */
2985 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
2986 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
2987 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
2988 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
2989 &dev->descriptor, sizeof(dev->descriptor));
2990 config = dev->actconfig;
2991 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
2992 err = usb_reset_configuration(dev);
2993 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
2994 snd_printdd("extigy_boot: new boot length = %d\n",
2995 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
2996 return -ENODEV; /* quit this anyway */
2997 }
2998 return 0;
2999 }
3000
3001 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3002 {
3003 u8 buf = 1;
3004
3005 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3006 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3007 0, 0, &buf, 1, 1000);
3008 if (buf == 0) {
3009 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3010 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3011 1, 2000, NULL, 0, 1000);
3012 return -ENODEV;
3013 }
3014 return 0;
3015 }
3016
3017
3018 /*
3019 * audio-interface quirks
3020 *
3021 * returns zero if no standard audio/MIDI parsing is needed.
3022 * returns a postive value if standard audio/midi interfaces are parsed
3023 * after this.
3024 * returns a negative value at error.
3025 */
3026 static int snd_usb_create_quirk(snd_usb_audio_t *chip,
3027 struct usb_interface *iface,
3028 const snd_usb_audio_quirk_t *quirk)
3029 {
3030 typedef int (*quirk_func_t)(snd_usb_audio_t *, struct usb_interface *,
3031 const snd_usb_audio_quirk_t *);
3032 static const quirk_func_t quirk_funcs[] = {
3033 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3034 [QUIRK_COMPOSITE] = create_composite_quirk,
3035 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3036 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3037 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3038 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3039 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3040 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3041 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3042 [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface,
3043 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_interface_quirk,
3044 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3045 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3046 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3047 };
3048
3049 if (quirk->type < QUIRK_TYPE_COUNT) {
3050 return quirk_funcs[quirk->type](chip, iface, quirk);
3051 } else {
3052 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3053 return -ENXIO;
3054 }
3055 }
3056
3057
3058 /*
3059 * common proc files to show the usb device info
3060 */
3061 static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3062 {
3063 snd_usb_audio_t *chip = entry->private_data;
3064 if (! chip->shutdown)
3065 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3066 }
3067
3068 static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3069 {
3070 snd_usb_audio_t *chip = entry->private_data;
3071 if (! chip->shutdown)
3072 snd_iprintf(buffer, "%04x:%04x\n",
3073 USB_ID_VENDOR(chip->usb_id),
3074 USB_ID_PRODUCT(chip->usb_id));
3075 }
3076
3077 static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
3078 {
3079 snd_info_entry_t *entry;
3080 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3081 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3082 if (! snd_card_proc_new(chip->card, "usbid", &entry))
3083 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3084 }
3085
3086 /*
3087 * free the chip instance
3088 *
3089 * here we have to do not much, since pcm and controls are already freed
3090 *
3091 */
3092
3093 static int snd_usb_audio_free(snd_usb_audio_t *chip)
3094 {
3095 kfree(chip);
3096 return 0;
3097 }
3098
3099 static int snd_usb_audio_dev_free(snd_device_t *device)
3100 {
3101 snd_usb_audio_t *chip = device->device_data;
3102 return snd_usb_audio_free(chip);
3103 }
3104
3105
3106 /*
3107 * create a chip instance and set its names.
3108 */
3109 static int snd_usb_audio_create(struct usb_device *dev, int idx,
3110 const snd_usb_audio_quirk_t *quirk,
3111 snd_usb_audio_t **rchip)
3112 {
3113 snd_card_t *card;
3114 snd_usb_audio_t *chip;
3115 int err, len;
3116 char component[14];
3117 static snd_device_ops_t ops = {
3118 .dev_free = snd_usb_audio_dev_free,
3119 };
3120
3121 *rchip = NULL;
3122
3123 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3124 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3125 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3126 return -ENXIO;
3127 }
3128
3129 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3130 if (card == NULL) {
3131 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3132 return -ENOMEM;
3133 }
3134
3135 chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
3136 if (! chip) {
3137 snd_card_free(card);
3138 return -ENOMEM;
3139 }
3140
3141 chip->index = idx;
3142 chip->dev = dev;
3143 chip->card = card;
3144 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3145 le16_to_cpu(dev->descriptor.idProduct));
3146 INIT_LIST_HEAD(&chip->pcm_list);
3147 INIT_LIST_HEAD(&chip->midi_list);
3148 INIT_LIST_HEAD(&chip->mixer_list);
3149
3150 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3151 snd_usb_audio_free(chip);
3152 snd_card_free(card);
3153 return err;
3154 }
3155
3156 strcpy(card->driver, "USB-Audio");
3157 sprintf(component, "USB%04x:%04x",
3158 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
3159 snd_component_add(card, component);
3160
3161 /* retrieve the device string as shortname */
3162 if (quirk && quirk->product_name) {
3163 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3164 } else {
3165 if (!dev->descriptor.iProduct ||
3166 usb_string(dev, dev->descriptor.iProduct,
3167 card->shortname, sizeof(card->shortname)) <= 0) {
3168 /* no name available from anywhere, so use ID */
3169 sprintf(card->shortname, "USB Device %#04x:%#04x",
3170 USB_ID_VENDOR(chip->usb_id),
3171 USB_ID_PRODUCT(chip->usb_id));
3172 }
3173 }
3174
3175 /* retrieve the vendor and device strings as longname */
3176 if (quirk && quirk->vendor_name) {
3177 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3178 } else {
3179 if (dev->descriptor.iManufacturer)
3180 len = usb_string(dev, dev->descriptor.iManufacturer,
3181 card->longname, sizeof(card->longname));
3182 else
3183 len = 0;
3184 /* we don't really care if there isn't any vendor string */
3185 }
3186 if (len > 0)
3187 strlcat(card->longname, " ", sizeof(card->longname));
3188
3189 strlcat(card->longname, card->shortname, sizeof(card->longname));
3190
3191 len = strlcat(card->longname, " at ", sizeof(card->longname));
3192
3193 if (len < sizeof(card->longname))
3194 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3195
3196 strlcat(card->longname,
3197 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3198 sizeof(card->longname));
3199
3200 snd_usb_audio_create_proc(chip);
3201
3202 *rchip = chip;
3203 return 0;
3204 }
3205
3206
3207 /*
3208 * probe the active usb device
3209 *
3210 * note that this can be called multiple times per a device, when it
3211 * includes multiple audio control interfaces.
3212 *
3213 * thus we check the usb device pointer and creates the card instance
3214 * only at the first time. the successive calls of this function will
3215 * append the pcm interface to the corresponding card.
3216 */
3217 static void *snd_usb_audio_probe(struct usb_device *dev,
3218 struct usb_interface *intf,
3219 const struct usb_device_id *usb_id)
3220 {
3221 struct usb_host_config *config = dev->actconfig;
3222 const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info;
3223 int i, err;
3224 snd_usb_audio_t *chip;
3225 struct usb_host_interface *alts;
3226 int ifnum;
3227 u32 id;
3228
3229 alts = &intf->altsetting[0];
3230 ifnum = get_iface_desc(alts)->bInterfaceNumber;
3231 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3232 le16_to_cpu(dev->descriptor.idProduct));
3233
3234 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3235 goto __err_val;
3236
3237 /* SB Extigy needs special boot-up sequence */
3238 /* if more models come, this will go to the quirk list. */
3239 if (id == USB_ID(0x041e, 0x3000)) {
3240 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3241 goto __err_val;
3242 config = dev->actconfig;
3243 }
3244 /* SB Audigy 2 NX needs its own boot-up magic, too */
3245 if (id == USB_ID(0x041e, 0x3020)) {
3246 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3247 goto __err_val;
3248 }
3249
3250 /*
3251 * found a config. now register to ALSA
3252 */
3253
3254 /* check whether it's already registered */
3255 chip = NULL;
3256 down(&register_mutex);
3257 for (i = 0; i < SNDRV_CARDS; i++) {
3258 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3259 if (usb_chip[i]->shutdown) {
3260 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3261 goto __error;
3262 }
3263 chip = usb_chip[i];
3264 break;
3265 }
3266 }
3267 if (! chip) {
3268 /* it's a fresh one.
3269 * now look for an empty slot and create a new card instance
3270 */
3271 /* first, set the current configuration for this device */
3272 if (usb_reset_configuration(dev) < 0) {
3273 snd_printk(KERN_ERR "cannot reset configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue);
3274 goto __error;
3275 }
3276 for (i = 0; i < SNDRV_CARDS; i++)
3277 if (enable[i] && ! usb_chip[i] &&
3278 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3279 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
3280 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3281 goto __error;
3282 }
3283 snd_card_set_dev(chip->card, &intf->dev);
3284 break;
3285 }
3286 if (! chip) {
3287 snd_printk(KERN_ERR "no available usb audio device\n");
3288 goto __error;
3289 }
3290 }
3291
3292 err = 1; /* continue */
3293 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3294 /* need some special handlings */
3295 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3296 goto __error;
3297 }
3298
3299 if (err > 0) {
3300 /* create normal USB audio interfaces */
3301 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3302 snd_usb_create_mixer(chip, ifnum) < 0) {
3303 goto __error;
3304 }
3305 }
3306
3307 /* we are allowed to call snd_card_register() many times */
3308 if (snd_card_register(chip->card) < 0) {
3309 goto __error;
3310 }
3311
3312 usb_chip[chip->index] = chip;
3313 chip->num_interfaces++;
3314 up(&register_mutex);
3315 return chip;
3316
3317 __error:
3318 if (chip && !chip->num_interfaces)
3319 snd_card_free(chip->card);
3320 up(&register_mutex);
3321 __err_val:
3322 return NULL;
3323 }
3324
3325 /*
3326 * we need to take care of counter, since disconnection can be called also
3327 * many times as well as usb_audio_probe().
3328 */
3329 static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3330 {
3331 snd_usb_audio_t *chip;
3332 snd_card_t *card;
3333 struct list_head *p;
3334
3335 if (ptr == (void *)-1L)
3336 return;
3337
3338 chip = ptr;
3339 card = chip->card;
3340 down(&register_mutex);
3341 chip->shutdown = 1;
3342 chip->num_interfaces--;
3343 if (chip->num_interfaces <= 0) {
3344 snd_card_disconnect(card);
3345 /* release the pcm resources */
3346 list_for_each(p, &chip->pcm_list) {
3347 snd_usb_stream_disconnect(p);
3348 }
3349 /* release the midi resources */
3350 list_for_each(p, &chip->midi_list) {
3351 snd_usbmidi_disconnect(p);
3352 }
3353 /* release mixer resources */
3354 list_for_each(p, &chip->mixer_list) {
3355 snd_usb_mixer_disconnect(p);
3356 }
3357 usb_chip[chip->index] = NULL;
3358 up(&register_mutex);
3359 snd_card_free(card);
3360 } else {
3361 up(&register_mutex);
3362 }
3363 }
3364
3365 /*
3366 * new 2.5 USB kernel API
3367 */
3368 static int usb_audio_probe(struct usb_interface *intf,
3369 const struct usb_device_id *id)
3370 {
3371 void *chip;
3372 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3373 if (chip) {
3374 dev_set_drvdata(&intf->dev, chip);
3375 return 0;
3376 } else
3377 return -EIO;
3378 }
3379
3380 static void usb_audio_disconnect(struct usb_interface *intf)
3381 {
3382 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3383 dev_get_drvdata(&intf->dev));
3384 }
3385
3386
3387 static int __init snd_usb_audio_init(void)
3388 {
3389 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3390 printk(KERN_WARNING "invalid nrpacks value.\n");
3391 return -EINVAL;
3392 }
3393 usb_register(&usb_audio_driver);
3394 return 0;
3395 }
3396
3397
3398 static void __exit snd_usb_audio_cleanup(void)
3399 {
3400 usb_deregister(&usb_audio_driver);
3401 }
3402
3403 module_init(snd_usb_audio_init);
3404 module_exit(snd_usb_audio_cleanup);
kernel source for telekom puls (alcatel/mediatek)