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[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/list.h>
45 #include <linux/slab.h>
46 #include <linux/string.h>
47 #include <linux/usb.h>
48 #include <linux/vmalloc.h>
49 #include <linux/moduleparam.h>
50 #include <sound/core.h>
51 #include <sound/info.h>
52 #include <sound/pcm.h>
53 #include <sound/pcm_params.h>
54 #include <sound/initval.h>
55
56 #include "usbaudio.h"
57
58
59 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
60 MODULE_DESCRIPTION("USB Audio");
61 MODULE_LICENSE("GPL");
62 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
63
64
65 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
66 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
67 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
68 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
69 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
70 static int nrpacks = 4; /* max. number of packets per urb */
71 static int async_unlink = 1;
72
73 module_param_array(index, int, NULL, 0444);
74 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
75 module_param_array(id, charp, NULL, 0444);
76 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
77 module_param_array(enable, bool, NULL, 0444);
78 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
79 module_param_array(vid, int, NULL, 0444);
80 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
81 module_param_array(pid, int, NULL, 0444);
82 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
83 module_param(nrpacks, int, 0644);
84 MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
85 module_param(async_unlink, bool, 0444);
86 MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
87
88
89 /*
90 * debug the h/w constraints
91 */
92 /* #define HW_CONST_DEBUG */
93
94
95 /*
96 *
97 */
98
99 #define MAX_PACKS 10
100 #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
101 #define MAX_URBS 8
102 #define SYNC_URBS 4 /* always four urbs for sync */
103 #define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
104
105 typedef struct snd_usb_substream snd_usb_substream_t;
106 typedef struct snd_usb_stream snd_usb_stream_t;
107 typedef struct snd_urb_ctx snd_urb_ctx_t;
108
109 struct audioformat {
110 struct list_head list;
111 snd_pcm_format_t format; /* format type */
112 unsigned int channels; /* # channels */
113 unsigned int fmt_type; /* USB audio format type (1-3) */
114 unsigned int frame_size; /* samples per frame for non-audio */
115 int iface; /* interface number */
116 unsigned char altsetting; /* corresponding alternate setting */
117 unsigned char altset_idx; /* array index of altenate setting */
118 unsigned char attributes; /* corresponding attributes of cs endpoint */
119 unsigned char endpoint; /* endpoint */
120 unsigned char ep_attr; /* endpoint attributes */
121 unsigned int maxpacksize; /* max. packet size */
122 unsigned int rates; /* rate bitmasks */
123 unsigned int rate_min, rate_max; /* min/max rates */
124 unsigned int nr_rates; /* number of rate table entries */
125 unsigned int *rate_table; /* rate table */
126 };
127
128 struct snd_urb_ctx {
129 struct urb *urb;
130 unsigned int buffer_size; /* size of data buffer, if data URB */
131 snd_usb_substream_t *subs;
132 int index; /* index for urb array */
133 int packets; /* number of packets per urb */
134 };
135
136 struct snd_urb_ops {
137 int (*prepare)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
138 int (*retire)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
139 int (*prepare_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
140 int (*retire_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
141 };
142
143 struct snd_usb_substream {
144 snd_usb_stream_t *stream;
145 struct usb_device *dev;
146 snd_pcm_substream_t *pcm_substream;
147 int direction; /* playback or capture */
148 int interface; /* current interface */
149 int endpoint; /* assigned endpoint */
150 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
151 unsigned int cur_rate; /* current rate (for hw_params callback) */
152 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
153 unsigned int format; /* USB data format */
154 unsigned int datapipe; /* the data i/o pipe */
155 unsigned int syncpipe; /* 1 - async out or adaptive in */
156 unsigned int datainterval; /* log_2 of data packet interval */
157 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
158 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
159 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
160 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
161 unsigned int phase; /* phase accumulator */
162 unsigned int maxpacksize; /* max packet size in bytes */
163 unsigned int maxframesize; /* max packet size in frames */
164 unsigned int curpacksize; /* current packet size in bytes (for capture) */
165 unsigned int curframesize; /* current packet size in frames (for capture) */
166 unsigned int fill_max: 1; /* fill max packet size always */
167 unsigned int fmt_type; /* USB audio format type (1-3) */
168 unsigned int packs_per_ms; /* packets per millisecond (for playback) */
169
170 unsigned int running: 1; /* running status */
171
172 unsigned int hwptr_done; /* processed frame position in the buffer */
173 unsigned int transfer_done; /* processed frames since last period update */
174 unsigned long active_mask; /* bitmask of active urbs */
175 unsigned long unlink_mask; /* bitmask of unlinked urbs */
176
177 unsigned int nurbs; /* # urbs */
178 snd_urb_ctx_t dataurb[MAX_URBS]; /* data urb table */
179 snd_urb_ctx_t syncurb[SYNC_URBS]; /* sync urb table */
180 char *syncbuf; /* sync buffer for all sync URBs */
181 dma_addr_t sync_dma; /* DMA address of syncbuf */
182
183 u64 formats; /* format bitmasks (all or'ed) */
184 unsigned int num_formats; /* number of supported audio formats (list) */
185 struct list_head fmt_list; /* format list */
186 spinlock_t lock;
187
188 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
189 };
190
191
192 struct snd_usb_stream {
193 snd_usb_audio_t *chip;
194 snd_pcm_t *pcm;
195 int pcm_index;
196 unsigned int fmt_type; /* USB audio format type (1-3) */
197 snd_usb_substream_t substream[2];
198 struct list_head list;
199 };
200
201
202 /*
203 * we keep the snd_usb_audio_t instances by ourselves for merging
204 * the all interfaces on the same card as one sound device.
205 */
206
207 static DECLARE_MUTEX(register_mutex);
208 static snd_usb_audio_t *usb_chip[SNDRV_CARDS];
209
210
211 /*
212 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
213 * this will overflow at approx 524 kHz
214 */
215 static inline unsigned get_usb_full_speed_rate(unsigned int rate)
216 {
217 return ((rate << 13) + 62) / 125;
218 }
219
220 /*
221 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
222 * this will overflow at approx 4 MHz
223 */
224 static inline unsigned get_usb_high_speed_rate(unsigned int rate)
225 {
226 return ((rate << 10) + 62) / 125;
227 }
228
229 /* convert our full speed USB rate into sampling rate in Hz */
230 static inline unsigned get_full_speed_hz(unsigned int usb_rate)
231 {
232 return (usb_rate * 125 + (1 << 12)) >> 13;
233 }
234
235 /* convert our high speed USB rate into sampling rate in Hz */
236 static inline unsigned get_high_speed_hz(unsigned int usb_rate)
237 {
238 return (usb_rate * 125 + (1 << 9)) >> 10;
239 }
240
241
242 /*
243 * prepare urb for full speed capture sync pipe
244 *
245 * fill the length and offset of each urb descriptor.
246 * the fixed 10.14 frequency is passed through the pipe.
247 */
248 static int prepare_capture_sync_urb(snd_usb_substream_t *subs,
249 snd_pcm_runtime_t *runtime,
250 struct urb *urb)
251 {
252 unsigned char *cp = urb->transfer_buffer;
253 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
254
255 urb->dev = ctx->subs->dev; /* we need to set this at each time */
256 urb->iso_frame_desc[0].length = 3;
257 urb->iso_frame_desc[0].offset = 0;
258 cp[0] = subs->freqn >> 2;
259 cp[1] = subs->freqn >> 10;
260 cp[2] = subs->freqn >> 18;
261 return 0;
262 }
263
264 /*
265 * prepare urb for high speed capture sync pipe
266 *
267 * fill the length and offset of each urb descriptor.
268 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
269 */
270 static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs,
271 snd_pcm_runtime_t *runtime,
272 struct urb *urb)
273 {
274 unsigned char *cp = urb->transfer_buffer;
275 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
276
277 urb->dev = ctx->subs->dev; /* we need to set this at each time */
278 urb->iso_frame_desc[0].length = 4;
279 urb->iso_frame_desc[0].offset = 0;
280 cp[0] = subs->freqn;
281 cp[1] = subs->freqn >> 8;
282 cp[2] = subs->freqn >> 16;
283 cp[3] = subs->freqn >> 24;
284 return 0;
285 }
286
287 /*
288 * process after capture sync complete
289 * - nothing to do
290 */
291 static int retire_capture_sync_urb(snd_usb_substream_t *subs,
292 snd_pcm_runtime_t *runtime,
293 struct urb *urb)
294 {
295 return 0;
296 }
297
298 /*
299 * prepare urb for capture data pipe
300 *
301 * fill the offset and length of each descriptor.
302 *
303 * we use a temporary buffer to write the captured data.
304 * since the length of written data is determined by host, we cannot
305 * write onto the pcm buffer directly... the data is thus copied
306 * later at complete callback to the global buffer.
307 */
308 static int prepare_capture_urb(snd_usb_substream_t *subs,
309 snd_pcm_runtime_t *runtime,
310 struct urb *urb)
311 {
312 int i, offs;
313 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
314
315 offs = 0;
316 urb->dev = ctx->subs->dev; /* we need to set this at each time */
317 for (i = 0; i < ctx->packets; i++) {
318 urb->iso_frame_desc[i].offset = offs;
319 urb->iso_frame_desc[i].length = subs->curpacksize;
320 offs += subs->curpacksize;
321 }
322 urb->transfer_buffer_length = offs;
323 urb->number_of_packets = ctx->packets;
324 #if 0 // for check
325 if (! urb->bandwidth) {
326 int bustime;
327 bustime = usb_check_bandwidth(urb->dev, urb);
328 if (bustime < 0)
329 return bustime;
330 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
331 usb_claim_bandwidth(urb->dev, urb, bustime, 1);
332 }
333 #endif // for check
334 return 0;
335 }
336
337 /*
338 * process after capture complete
339 *
340 * copy the data from each desctiptor to the pcm buffer, and
341 * update the current position.
342 */
343 static int retire_capture_urb(snd_usb_substream_t *subs,
344 snd_pcm_runtime_t *runtime,
345 struct urb *urb)
346 {
347 unsigned long flags;
348 unsigned char *cp;
349 int i;
350 unsigned int stride, len, oldptr;
351 int period_elapsed = 0;
352
353 stride = runtime->frame_bits >> 3;
354
355 for (i = 0; i < urb->number_of_packets; i++) {
356 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
357 if (urb->iso_frame_desc[i].status) {
358 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
359 // continue;
360 }
361 len = urb->iso_frame_desc[i].actual_length / stride;
362 if (! len)
363 continue;
364 /* update the current pointer */
365 spin_lock_irqsave(&subs->lock, flags);
366 oldptr = subs->hwptr_done;
367 subs->hwptr_done += len;
368 if (subs->hwptr_done >= runtime->buffer_size)
369 subs->hwptr_done -= runtime->buffer_size;
370 subs->transfer_done += len;
371 if (subs->transfer_done >= runtime->period_size) {
372 subs->transfer_done -= runtime->period_size;
373 period_elapsed = 1;
374 }
375 spin_unlock_irqrestore(&subs->lock, flags);
376 /* copy a data chunk */
377 if (oldptr + len > runtime->buffer_size) {
378 unsigned int cnt = runtime->buffer_size - oldptr;
379 unsigned int blen = cnt * stride;
380 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
381 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
382 } else {
383 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
384 }
385 }
386 if (period_elapsed)
387 snd_pcm_period_elapsed(subs->pcm_substream);
388 return 0;
389 }
390
391
392 /*
393 * prepare urb for full speed playback sync pipe
394 *
395 * set up the offset and length to receive the current frequency.
396 */
397
398 static int prepare_playback_sync_urb(snd_usb_substream_t *subs,
399 snd_pcm_runtime_t *runtime,
400 struct urb *urb)
401 {
402 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
403
404 urb->dev = ctx->subs->dev; /* we need to set this at each time */
405 urb->iso_frame_desc[0].length = 3;
406 urb->iso_frame_desc[0].offset = 0;
407 return 0;
408 }
409
410 /*
411 * prepare urb for high speed playback sync pipe
412 *
413 * set up the offset and length to receive the current frequency.
414 */
415
416 static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs,
417 snd_pcm_runtime_t *runtime,
418 struct urb *urb)
419 {
420 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
421
422 urb->dev = ctx->subs->dev; /* we need to set this at each time */
423 urb->iso_frame_desc[0].length = 4;
424 urb->iso_frame_desc[0].offset = 0;
425 return 0;
426 }
427
428 /*
429 * process after full speed playback sync complete
430 *
431 * retrieve the current 10.14 frequency from pipe, and set it.
432 * the value is referred in prepare_playback_urb().
433 */
434 static int retire_playback_sync_urb(snd_usb_substream_t *subs,
435 snd_pcm_runtime_t *runtime,
436 struct urb *urb)
437 {
438 unsigned int f;
439 unsigned long flags;
440
441 if (urb->iso_frame_desc[0].status == 0 &&
442 urb->iso_frame_desc[0].actual_length == 3) {
443 f = combine_triple((u8*)urb->transfer_buffer) << 2;
444 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
445 spin_lock_irqsave(&subs->lock, flags);
446 subs->freqm = f;
447 spin_unlock_irqrestore(&subs->lock, flags);
448 }
449 }
450
451 return 0;
452 }
453
454 /*
455 * process after high speed playback sync complete
456 *
457 * retrieve the current 12.13 frequency from pipe, and set it.
458 * the value is referred in prepare_playback_urb().
459 */
460 static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs,
461 snd_pcm_runtime_t *runtime,
462 struct urb *urb)
463 {
464 unsigned int f;
465 unsigned long flags;
466
467 if (urb->iso_frame_desc[0].status == 0 &&
468 urb->iso_frame_desc[0].actual_length == 4) {
469 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
470 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
471 spin_lock_irqsave(&subs->lock, flags);
472 subs->freqm = f;
473 spin_unlock_irqrestore(&subs->lock, flags);
474 }
475 }
476
477 return 0;
478 }
479
480 /*
481 * Prepare urb for streaming before playback starts.
482 *
483 * We don't care about (or have) any data, so we just send a transfer delimiter.
484 */
485 static int prepare_startup_playback_urb(snd_usb_substream_t *subs,
486 snd_pcm_runtime_t *runtime,
487 struct urb *urb)
488 {
489 unsigned int i;
490 snd_urb_ctx_t *ctx = urb->context;
491
492 urb->dev = ctx->subs->dev;
493 urb->number_of_packets = subs->packs_per_ms;
494 for (i = 0; i < subs->packs_per_ms; ++i) {
495 urb->iso_frame_desc[i].offset = 0;
496 urb->iso_frame_desc[i].length = 0;
497 }
498 urb->transfer_buffer_length = 0;
499 return 0;
500 }
501
502 /*
503 * prepare urb for playback data pipe
504 *
505 * Since a URB can handle only a single linear buffer, we must use double
506 * buffering when the data to be transferred overflows the buffer boundary.
507 * To avoid inconsistencies when updating hwptr_done, we use double buffering
508 * for all URBs.
509 */
510 static int prepare_playback_urb(snd_usb_substream_t *subs,
511 snd_pcm_runtime_t *runtime,
512 struct urb *urb)
513 {
514 int i, stride, offs;
515 unsigned int counts;
516 unsigned long flags;
517 int period_elapsed = 0;
518 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
519
520 stride = runtime->frame_bits >> 3;
521
522 offs = 0;
523 urb->dev = ctx->subs->dev; /* we need to set this at each time */
524 urb->number_of_packets = 0;
525 spin_lock_irqsave(&subs->lock, flags);
526 for (i = 0; i < ctx->packets; i++) {
527 /* calculate the size of a packet */
528 if (subs->fill_max)
529 counts = subs->maxframesize; /* fixed */
530 else {
531 subs->phase = (subs->phase & 0xffff)
532 + (subs->freqm << subs->datainterval);
533 counts = subs->phase >> 16;
534 if (counts > subs->maxframesize)
535 counts = subs->maxframesize;
536 }
537 /* set up descriptor */
538 urb->iso_frame_desc[i].offset = offs * stride;
539 urb->iso_frame_desc[i].length = counts * stride;
540 offs += counts;
541 urb->number_of_packets++;
542 subs->transfer_done += counts;
543 if (subs->transfer_done >= runtime->period_size) {
544 subs->transfer_done -= runtime->period_size;
545 period_elapsed = 1;
546 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
547 if (subs->transfer_done > 0) {
548 /* FIXME: fill-max mode is not
549 * supported yet */
550 offs -= subs->transfer_done;
551 counts -= subs->transfer_done;
552 urb->iso_frame_desc[i].length =
553 counts * stride;
554 subs->transfer_done = 0;
555 }
556 i++;
557 if (i < ctx->packets) {
558 /* add a transfer delimiter */
559 urb->iso_frame_desc[i].offset =
560 offs * stride;
561 urb->iso_frame_desc[i].length = 0;
562 urb->number_of_packets++;
563 }
564 break;
565 }
566 }
567 /* finish at the frame boundary at/after the period boundary */
568 if (period_elapsed &&
569 (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
570 break;
571 }
572 if (subs->hwptr_done + offs > runtime->buffer_size) {
573 /* err, the transferred area goes over buffer boundary. */
574 unsigned int len = runtime->buffer_size - subs->hwptr_done;
575 memcpy(urb->transfer_buffer,
576 runtime->dma_area + subs->hwptr_done * stride,
577 len * stride);
578 memcpy(urb->transfer_buffer + len * stride,
579 runtime->dma_area,
580 (offs - len) * stride);
581 } else {
582 memcpy(urb->transfer_buffer,
583 runtime->dma_area + subs->hwptr_done * stride,
584 offs * stride);
585 }
586 subs->hwptr_done += offs;
587 if (subs->hwptr_done >= runtime->buffer_size)
588 subs->hwptr_done -= runtime->buffer_size;
589 spin_unlock_irqrestore(&subs->lock, flags);
590 urb->transfer_buffer_length = offs * stride;
591 if (period_elapsed)
592 snd_pcm_period_elapsed(subs->pcm_substream);
593 return 0;
594 }
595
596 /*
597 * process after playback data complete
598 * - nothing to do
599 */
600 static int retire_playback_urb(snd_usb_substream_t *subs,
601 snd_pcm_runtime_t *runtime,
602 struct urb *urb)
603 {
604 return 0;
605 }
606
607
608 /*
609 */
610 static struct snd_urb_ops audio_urb_ops[2] = {
611 {
612 .prepare = prepare_startup_playback_urb,
613 .retire = retire_playback_urb,
614 .prepare_sync = prepare_playback_sync_urb,
615 .retire_sync = retire_playback_sync_urb,
616 },
617 {
618 .prepare = prepare_capture_urb,
619 .retire = retire_capture_urb,
620 .prepare_sync = prepare_capture_sync_urb,
621 .retire_sync = retire_capture_sync_urb,
622 },
623 };
624
625 static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
626 {
627 .prepare = prepare_startup_playback_urb,
628 .retire = retire_playback_urb,
629 .prepare_sync = prepare_playback_sync_urb_hs,
630 .retire_sync = retire_playback_sync_urb_hs,
631 },
632 {
633 .prepare = prepare_capture_urb,
634 .retire = retire_capture_urb,
635 .prepare_sync = prepare_capture_sync_urb_hs,
636 .retire_sync = retire_capture_sync_urb,
637 },
638 };
639
640 /*
641 * complete callback from data urb
642 */
643 static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
644 {
645 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
646 snd_usb_substream_t *subs = ctx->subs;
647 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
648 int err = 0;
649
650 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
651 ! subs->running || /* can be stopped during retire callback */
652 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
653 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
654 clear_bit(ctx->index, &subs->active_mask);
655 if (err < 0) {
656 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
657 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
658 }
659 }
660 }
661
662
663 /*
664 * complete callback from sync urb
665 */
666 static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
667 {
668 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
669 snd_usb_substream_t *subs = ctx->subs;
670 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
671 int err = 0;
672
673 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
674 ! subs->running || /* can be stopped during retire callback */
675 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
676 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
677 clear_bit(ctx->index + 16, &subs->active_mask);
678 if (err < 0) {
679 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
680 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
681 }
682 }
683 }
684
685
686 /* get the physical page pointer at the given offset */
687 static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs,
688 unsigned long offset)
689 {
690 void *pageptr = subs->runtime->dma_area + offset;
691 return vmalloc_to_page(pageptr);
692 }
693
694 /* allocate virtual buffer; may be called more than once */
695 static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size)
696 {
697 snd_pcm_runtime_t *runtime = subs->runtime;
698 if (runtime->dma_area) {
699 if (runtime->dma_bytes >= size)
700 return 0; /* already large enough */
701 vfree(runtime->dma_area);
702 }
703 runtime->dma_area = vmalloc(size);
704 if (! runtime->dma_area)
705 return -ENOMEM;
706 runtime->dma_bytes = size;
707 return 0;
708 }
709
710 /* free virtual buffer; may be called more than once */
711 static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs)
712 {
713 snd_pcm_runtime_t *runtime = subs->runtime;
714 if (runtime->dma_area) {
715 vfree(runtime->dma_area);
716 runtime->dma_area = NULL;
717 }
718 return 0;
719 }
720
721
722 /*
723 * unlink active urbs.
724 */
725 static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
726 {
727 unsigned int i;
728 int async;
729
730 subs->running = 0;
731
732 if (!force && subs->stream->chip->shutdown) /* to be sure... */
733 return -EBADFD;
734
735 async = !can_sleep && async_unlink;
736
737 if (! async && in_interrupt())
738 return 0;
739
740 for (i = 0; i < subs->nurbs; i++) {
741 if (test_bit(i, &subs->active_mask)) {
742 if (! test_and_set_bit(i, &subs->unlink_mask)) {
743 struct urb *u = subs->dataurb[i].urb;
744 if (async)
745 usb_unlink_urb(u);
746 else
747 usb_kill_urb(u);
748 }
749 }
750 }
751 if (subs->syncpipe) {
752 for (i = 0; i < SYNC_URBS; i++) {
753 if (test_bit(i+16, &subs->active_mask)) {
754 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
755 struct urb *u = subs->syncurb[i].urb;
756 if (async)
757 usb_unlink_urb(u);
758 else
759 usb_kill_urb(u);
760 }
761 }
762 }
763 }
764 return 0;
765 }
766
767
768 /*
769 * set up and start data/sync urbs
770 */
771 static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
772 {
773 unsigned int i;
774 int err;
775
776 if (subs->stream->chip->shutdown)
777 return -EBADFD;
778
779 for (i = 0; i < subs->nurbs; i++) {
780 snd_assert(subs->dataurb[i].urb, return -EINVAL);
781 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
782 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
783 goto __error;
784 }
785 }
786 if (subs->syncpipe) {
787 for (i = 0; i < SYNC_URBS; i++) {
788 snd_assert(subs->syncurb[i].urb, return -EINVAL);
789 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
790 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
791 goto __error;
792 }
793 }
794 }
795
796 subs->active_mask = 0;
797 subs->unlink_mask = 0;
798 subs->running = 1;
799 for (i = 0; i < subs->nurbs; i++) {
800 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
801 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
802 goto __error;
803 }
804 set_bit(i, &subs->active_mask);
805 }
806 if (subs->syncpipe) {
807 for (i = 0; i < SYNC_URBS; i++) {
808 if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
809 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
810 goto __error;
811 }
812 set_bit(i + 16, &subs->active_mask);
813 }
814 }
815 return 0;
816
817 __error:
818 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
819 deactivate_urbs(subs, 0, 0);
820 return -EPIPE;
821 }
822
823
824 /*
825 * wait until all urbs are processed.
826 */
827 static int wait_clear_urbs(snd_usb_substream_t *subs)
828 {
829 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
830 unsigned int i;
831 int alive;
832
833 do {
834 alive = 0;
835 for (i = 0; i < subs->nurbs; i++) {
836 if (test_bit(i, &subs->active_mask))
837 alive++;
838 }
839 if (subs->syncpipe) {
840 for (i = 0; i < SYNC_URBS; i++) {
841 if (test_bit(i + 16, &subs->active_mask))
842 alive++;
843 }
844 }
845 if (! alive)
846 break;
847 schedule_timeout_uninterruptible(1);
848 } while (time_before(jiffies, end_time));
849 if (alive)
850 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
851 return 0;
852 }
853
854
855 /*
856 * return the current pcm pointer. just return the hwptr_done value.
857 */
858 static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
859 {
860 snd_usb_substream_t *subs;
861 snd_pcm_uframes_t hwptr_done;
862
863 subs = (snd_usb_substream_t *)substream->runtime->private_data;
864 spin_lock(&subs->lock);
865 hwptr_done = subs->hwptr_done;
866 spin_unlock(&subs->lock);
867 return hwptr_done;
868 }
869
870
871 /*
872 * start/stop playback substream
873 */
874 static int snd_usb_pcm_playback_trigger(snd_pcm_substream_t *substream,
875 int cmd)
876 {
877 snd_usb_substream_t *subs = substream->runtime->private_data;
878
879 switch (cmd) {
880 case SNDRV_PCM_TRIGGER_START:
881 subs->ops.prepare = prepare_playback_urb;
882 return 0;
883 case SNDRV_PCM_TRIGGER_STOP:
884 return deactivate_urbs(subs, 0, 0);
885 default:
886 return -EINVAL;
887 }
888 }
889
890 /*
891 * start/stop capture substream
892 */
893 static int snd_usb_pcm_capture_trigger(snd_pcm_substream_t *substream,
894 int cmd)
895 {
896 snd_usb_substream_t *subs = substream->runtime->private_data;
897
898 switch (cmd) {
899 case SNDRV_PCM_TRIGGER_START:
900 return start_urbs(subs, substream->runtime);
901 case SNDRV_PCM_TRIGGER_STOP:
902 return deactivate_urbs(subs, 0, 0);
903 default:
904 return -EINVAL;
905 }
906 }
907
908
909 /*
910 * release a urb data
911 */
912 static void release_urb_ctx(snd_urb_ctx_t *u)
913 {
914 if (u->urb) {
915 if (u->buffer_size)
916 usb_buffer_free(u->subs->dev, u->buffer_size,
917 u->urb->transfer_buffer,
918 u->urb->transfer_dma);
919 usb_free_urb(u->urb);
920 u->urb = NULL;
921 }
922 }
923
924 /*
925 * release a substream
926 */
927 static void release_substream_urbs(snd_usb_substream_t *subs, int force)
928 {
929 int i;
930
931 /* stop urbs (to be sure) */
932 deactivate_urbs(subs, force, 1);
933 wait_clear_urbs(subs);
934
935 for (i = 0; i < MAX_URBS; i++)
936 release_urb_ctx(&subs->dataurb[i]);
937 for (i = 0; i < SYNC_URBS; i++)
938 release_urb_ctx(&subs->syncurb[i]);
939 usb_buffer_free(subs->dev, SYNC_URBS * 4,
940 subs->syncbuf, subs->sync_dma);
941 subs->syncbuf = NULL;
942 subs->nurbs = 0;
943 }
944
945 /*
946 * initialize a substream for plaback/capture
947 */
948 static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes,
949 unsigned int rate, unsigned int frame_bits)
950 {
951 unsigned int maxsize, n, i;
952 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
953 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
954
955 /* calculate the frequency in 16.16 format */
956 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
957 subs->freqn = get_usb_full_speed_rate(rate);
958 else
959 subs->freqn = get_usb_high_speed_rate(rate);
960 subs->freqm = subs->freqn;
961 /* calculate max. frequency */
962 if (subs->maxpacksize) {
963 /* whatever fits into a max. size packet */
964 maxsize = subs->maxpacksize;
965 subs->freqmax = (maxsize / (frame_bits >> 3))
966 << (16 - subs->datainterval);
967 } else {
968 /* no max. packet size: just take 25% higher than nominal */
969 subs->freqmax = subs->freqn + (subs->freqn >> 2);
970 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
971 >> (16 - subs->datainterval);
972 }
973 subs->phase = 0;
974
975 if (subs->fill_max)
976 subs->curpacksize = subs->maxpacksize;
977 else
978 subs->curpacksize = maxsize;
979
980 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
981 packs_per_ms = 8 >> subs->datainterval;
982 else
983 packs_per_ms = 1;
984 subs->packs_per_ms = packs_per_ms;
985
986 if (is_playback) {
987 urb_packs = nrpacks;
988 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
989 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
990 } else
991 urb_packs = 1;
992 urb_packs *= packs_per_ms;
993
994 /* decide how many packets to be used */
995 if (is_playback) {
996 unsigned int minsize;
997 /* determine how small a packet can be */
998 minsize = (subs->freqn >> (16 - subs->datainterval))
999 * (frame_bits >> 3);
1000 /* with sync from device, assume it can be 12% lower */
1001 if (subs->syncpipe)
1002 minsize -= minsize >> 3;
1003 minsize = max(minsize, 1u);
1004 total_packs = (period_bytes + minsize - 1) / minsize;
1005 /* round up to multiple of packs_per_ms */
1006 total_packs = (total_packs + packs_per_ms - 1)
1007 & ~(packs_per_ms - 1);
1008 /* we need at least two URBs for queueing */
1009 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
1010 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
1011 } else {
1012 total_packs = MAX_URBS * urb_packs;
1013 }
1014 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1015 if (subs->nurbs > MAX_URBS) {
1016 /* too much... */
1017 subs->nurbs = MAX_URBS;
1018 total_packs = MAX_URBS * urb_packs;
1019 }
1020 n = total_packs;
1021 for (i = 0; i < subs->nurbs; i++) {
1022 npacks[i] = n > urb_packs ? urb_packs : n;
1023 n -= urb_packs;
1024 }
1025 if (subs->nurbs <= 1) {
1026 /* too little - we need at least two packets
1027 * to ensure contiguous playback/capture
1028 */
1029 subs->nurbs = 2;
1030 npacks[0] = (total_packs + 1) / 2;
1031 npacks[1] = total_packs - npacks[0];
1032 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1033 /* the last packet is too small.. */
1034 if (subs->nurbs > 2) {
1035 /* merge to the first one */
1036 npacks[0] += npacks[subs->nurbs - 1];
1037 subs->nurbs--;
1038 } else {
1039 /* divide to two */
1040 subs->nurbs = 2;
1041 npacks[0] = (total_packs + 1) / 2;
1042 npacks[1] = total_packs - npacks[0];
1043 }
1044 }
1045
1046 /* allocate and initialize data urbs */
1047 for (i = 0; i < subs->nurbs; i++) {
1048 snd_urb_ctx_t *u = &subs->dataurb[i];
1049 u->index = i;
1050 u->subs = subs;
1051 u->packets = npacks[i];
1052 u->buffer_size = maxsize * u->packets;
1053 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1054 u->packets++; /* for transfer delimiter */
1055 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
1056 if (! u->urb)
1057 goto out_of_memory;
1058 u->urb->transfer_buffer =
1059 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1060 &u->urb->transfer_dma);
1061 if (! u->urb->transfer_buffer)
1062 goto out_of_memory;
1063 u->urb->pipe = subs->datapipe;
1064 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1065 u->urb->interval = 1 << subs->datainterval;
1066 u->urb->context = u;
1067 u->urb->complete = snd_complete_urb;
1068 }
1069
1070 if (subs->syncpipe) {
1071 /* allocate and initialize sync urbs */
1072 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1073 GFP_KERNEL, &subs->sync_dma);
1074 if (! subs->syncbuf)
1075 goto out_of_memory;
1076 for (i = 0; i < SYNC_URBS; i++) {
1077 snd_urb_ctx_t *u = &subs->syncurb[i];
1078 u->index = i;
1079 u->subs = subs;
1080 u->packets = 1;
1081 u->urb = usb_alloc_urb(1, GFP_KERNEL);
1082 if (! u->urb)
1083 goto out_of_memory;
1084 u->urb->transfer_buffer = subs->syncbuf + i * 4;
1085 u->urb->transfer_dma = subs->sync_dma + i * 4;
1086 u->urb->transfer_buffer_length = 4;
1087 u->urb->pipe = subs->syncpipe;
1088 u->urb->transfer_flags = URB_ISO_ASAP |
1089 URB_NO_TRANSFER_DMA_MAP;
1090 u->urb->number_of_packets = 1;
1091 u->urb->interval = 1 << subs->syncinterval;
1092 u->urb->context = u;
1093 u->urb->complete = snd_complete_sync_urb;
1094 }
1095 }
1096 return 0;
1097
1098 out_of_memory:
1099 release_substream_urbs(subs, 0);
1100 return -ENOMEM;
1101 }
1102
1103
1104 /*
1105 * find a matching audio format
1106 */
1107 static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format,
1108 unsigned int rate, unsigned int channels)
1109 {
1110 struct list_head *p;
1111 struct audioformat *found = NULL;
1112 int cur_attr = 0, attr;
1113
1114 list_for_each(p, &subs->fmt_list) {
1115 struct audioformat *fp;
1116 fp = list_entry(p, struct audioformat, list);
1117 if (fp->format != format || fp->channels != channels)
1118 continue;
1119 if (rate < fp->rate_min || rate > fp->rate_max)
1120 continue;
1121 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1122 unsigned int i;
1123 for (i = 0; i < fp->nr_rates; i++)
1124 if (fp->rate_table[i] == rate)
1125 break;
1126 if (i >= fp->nr_rates)
1127 continue;
1128 }
1129 attr = fp->ep_attr & EP_ATTR_MASK;
1130 if (! found) {
1131 found = fp;
1132 cur_attr = attr;
1133 continue;
1134 }
1135 /* avoid async out and adaptive in if the other method
1136 * supports the same format.
1137 * this is a workaround for the case like
1138 * M-audio audiophile USB.
1139 */
1140 if (attr != cur_attr) {
1141 if ((attr == EP_ATTR_ASYNC &&
1142 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1143 (attr == EP_ATTR_ADAPTIVE &&
1144 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1145 continue;
1146 if ((cur_attr == EP_ATTR_ASYNC &&
1147 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1148 (cur_attr == EP_ATTR_ADAPTIVE &&
1149 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1150 found = fp;
1151 cur_attr = attr;
1152 continue;
1153 }
1154 }
1155 /* find the format with the largest max. packet size */
1156 if (fp->maxpacksize > found->maxpacksize) {
1157 found = fp;
1158 cur_attr = attr;
1159 }
1160 }
1161 return found;
1162 }
1163
1164
1165 /*
1166 * initialize the picth control and sample rate
1167 */
1168 static int init_usb_pitch(struct usb_device *dev, int iface,
1169 struct usb_host_interface *alts,
1170 struct audioformat *fmt)
1171 {
1172 unsigned int ep;
1173 unsigned char data[1];
1174 int err;
1175
1176 ep = get_endpoint(alts, 0)->bEndpointAddress;
1177 /* if endpoint has pitch control, enable it */
1178 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1179 data[0] = 1;
1180 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1181 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1182 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1183 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1184 dev->devnum, iface, ep);
1185 return err;
1186 }
1187 }
1188 return 0;
1189 }
1190
1191 static int init_usb_sample_rate(struct usb_device *dev, int iface,
1192 struct usb_host_interface *alts,
1193 struct audioformat *fmt, int rate)
1194 {
1195 unsigned int ep;
1196 unsigned char data[3];
1197 int err;
1198
1199 ep = get_endpoint(alts, 0)->bEndpointAddress;
1200 /* if endpoint has sampling rate control, set it */
1201 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1202 int crate;
1203 data[0] = rate;
1204 data[1] = rate >> 8;
1205 data[2] = rate >> 16;
1206 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1207 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1208 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1209 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1210 dev->devnum, iface, fmt->altsetting, rate, ep);
1211 return err;
1212 }
1213 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1214 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1215 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1216 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1217 dev->devnum, iface, fmt->altsetting, ep);
1218 return 0; /* some devices don't support reading */
1219 }
1220 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1221 if (crate != rate) {
1222 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1223 // runtime->rate = crate;
1224 }
1225 }
1226 return 0;
1227 }
1228
1229 /*
1230 * find a matching format and set up the interface
1231 */
1232 static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
1233 {
1234 struct usb_device *dev = subs->dev;
1235 struct usb_host_interface *alts;
1236 struct usb_interface_descriptor *altsd;
1237 struct usb_interface *iface;
1238 unsigned int ep, attr;
1239 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1240 int err;
1241
1242 iface = usb_ifnum_to_if(dev, fmt->iface);
1243 snd_assert(iface, return -EINVAL);
1244 alts = &iface->altsetting[fmt->altset_idx];
1245 altsd = get_iface_desc(alts);
1246 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1247
1248 if (fmt == subs->cur_audiofmt)
1249 return 0;
1250
1251 /* close the old interface */
1252 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1253 usb_set_interface(subs->dev, subs->interface, 0);
1254 subs->interface = -1;
1255 subs->format = 0;
1256 }
1257
1258 /* set interface */
1259 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1260 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1261 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1262 dev->devnum, fmt->iface, fmt->altsetting);
1263 return -EIO;
1264 }
1265 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1266 subs->interface = fmt->iface;
1267 subs->format = fmt->altset_idx;
1268 }
1269
1270 /* create a data pipe */
1271 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1272 if (is_playback)
1273 subs->datapipe = usb_sndisocpipe(dev, ep);
1274 else
1275 subs->datapipe = usb_rcvisocpipe(dev, ep);
1276 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1277 get_endpoint(alts, 0)->bInterval >= 1 &&
1278 get_endpoint(alts, 0)->bInterval <= 4)
1279 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1280 else
1281 subs->datainterval = 0;
1282 subs->syncpipe = subs->syncinterval = 0;
1283 subs->maxpacksize = fmt->maxpacksize;
1284 subs->fill_max = 0;
1285
1286 /* we need a sync pipe in async OUT or adaptive IN mode */
1287 /* check the number of EP, since some devices have broken
1288 * descriptors which fool us. if it has only one EP,
1289 * assume it as adaptive-out or sync-in.
1290 */
1291 attr = fmt->ep_attr & EP_ATTR_MASK;
1292 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1293 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1294 altsd->bNumEndpoints >= 2) {
1295 /* check sync-pipe endpoint */
1296 /* ... and check descriptor size before accessing bSynchAddress
1297 because there is a version of the SB Audigy 2 NX firmware lacking
1298 the audio fields in the endpoint descriptors */
1299 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1300 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1301 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1302 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1303 dev->devnum, fmt->iface, fmt->altsetting);
1304 return -EINVAL;
1305 }
1306 ep = get_endpoint(alts, 1)->bEndpointAddress;
1307 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1308 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1309 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1310 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1311 dev->devnum, fmt->iface, fmt->altsetting);
1312 return -EINVAL;
1313 }
1314 ep &= USB_ENDPOINT_NUMBER_MASK;
1315 if (is_playback)
1316 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1317 else
1318 subs->syncpipe = usb_sndisocpipe(dev, ep);
1319 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1320 get_endpoint(alts, 1)->bRefresh >= 1 &&
1321 get_endpoint(alts, 1)->bRefresh <= 9)
1322 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
1323 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1324 subs->syncinterval = 1;
1325 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1326 get_endpoint(alts, 1)->bInterval <= 16)
1327 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1328 else
1329 subs->syncinterval = 3;
1330 }
1331
1332 /* always fill max packet size */
1333 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1334 subs->fill_max = 1;
1335
1336 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1337 return err;
1338
1339 subs->cur_audiofmt = fmt;
1340
1341 #if 0
1342 printk("setting done: format = %d, rate = %d, channels = %d\n",
1343 fmt->format, fmt->rate, fmt->channels);
1344 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1345 subs->datapipe, subs->syncpipe);
1346 #endif
1347
1348 return 0;
1349 }
1350
1351 /*
1352 * hw_params callback
1353 *
1354 * allocate a buffer and set the given audio format.
1355 *
1356 * so far we use a physically linear buffer although packetize transfer
1357 * doesn't need a continuous area.
1358 * if sg buffer is supported on the later version of alsa, we'll follow
1359 * that.
1360 */
1361 static int snd_usb_hw_params(snd_pcm_substream_t *substream,
1362 snd_pcm_hw_params_t *hw_params)
1363 {
1364 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1365 struct audioformat *fmt;
1366 unsigned int channels, rate, format;
1367 int ret, changed;
1368
1369 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1370 params_buffer_bytes(hw_params));
1371 if (ret < 0)
1372 return ret;
1373
1374 format = params_format(hw_params);
1375 rate = params_rate(hw_params);
1376 channels = params_channels(hw_params);
1377 fmt = find_format(subs, format, rate, channels);
1378 if (! fmt) {
1379 snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
1380 snd_pcm_format_name(format), rate, channels);
1381 return -EINVAL;
1382 }
1383
1384 changed = subs->cur_audiofmt != fmt ||
1385 subs->period_bytes != params_period_bytes(hw_params) ||
1386 subs->cur_rate != rate;
1387 if ((ret = set_format(subs, fmt)) < 0)
1388 return ret;
1389
1390 if (subs->cur_rate != rate) {
1391 struct usb_host_interface *alts;
1392 struct usb_interface *iface;
1393 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1394 alts = &iface->altsetting[fmt->altset_idx];
1395 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1396 if (ret < 0)
1397 return ret;
1398 subs->cur_rate = rate;
1399 }
1400
1401 if (changed) {
1402 /* format changed */
1403 release_substream_urbs(subs, 0);
1404 /* influenced: period_bytes, channels, rate, format, */
1405 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1406 params_rate(hw_params),
1407 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1408 }
1409
1410 return ret;
1411 }
1412
1413 /*
1414 * hw_free callback
1415 *
1416 * reset the audio format and release the buffer
1417 */
1418 static int snd_usb_hw_free(snd_pcm_substream_t *substream)
1419 {
1420 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1421
1422 subs->cur_audiofmt = NULL;
1423 subs->cur_rate = 0;
1424 subs->period_bytes = 0;
1425 release_substream_urbs(subs, 0);
1426 return snd_pcm_free_vmalloc_buffer(substream);
1427 }
1428
1429 /*
1430 * prepare callback
1431 *
1432 * only a few subtle things...
1433 */
1434 static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
1435 {
1436 snd_pcm_runtime_t *runtime = substream->runtime;
1437 snd_usb_substream_t *subs = runtime->private_data;
1438
1439 if (! subs->cur_audiofmt) {
1440 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1441 return -ENXIO;
1442 }
1443
1444 /* some unit conversions in runtime */
1445 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1446 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1447
1448 /* reset the pointer */
1449 subs->hwptr_done = 0;
1450 subs->transfer_done = 0;
1451 subs->phase = 0;
1452
1453 /* clear urbs (to be sure) */
1454 deactivate_urbs(subs, 0, 1);
1455 wait_clear_urbs(subs);
1456
1457 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1458 * updates for all URBs would happen at the same time when starting */
1459 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1460 subs->ops.prepare = prepare_startup_playback_urb;
1461 return start_urbs(subs, runtime);
1462 } else
1463 return 0;
1464 }
1465
1466 static snd_pcm_hardware_t snd_usb_playback =
1467 {
1468 .info = SNDRV_PCM_INFO_MMAP |
1469 SNDRV_PCM_INFO_MMAP_VALID |
1470 SNDRV_PCM_INFO_BATCH |
1471 SNDRV_PCM_INFO_INTERLEAVED |
1472 SNDRV_PCM_INFO_BLOCK_TRANSFER,
1473 .buffer_bytes_max = 1024 * 1024,
1474 .period_bytes_min = 64,
1475 .period_bytes_max = 512 * 1024,
1476 .periods_min = 2,
1477 .periods_max = 1024,
1478 };
1479
1480 static snd_pcm_hardware_t snd_usb_capture =
1481 {
1482 .info = SNDRV_PCM_INFO_MMAP |
1483 SNDRV_PCM_INFO_MMAP_VALID |
1484 SNDRV_PCM_INFO_BATCH |
1485 SNDRV_PCM_INFO_INTERLEAVED |
1486 SNDRV_PCM_INFO_BLOCK_TRANSFER,
1487 .buffer_bytes_max = 1024 * 1024,
1488 .period_bytes_min = 64,
1489 .period_bytes_max = 512 * 1024,
1490 .periods_min = 2,
1491 .periods_max = 1024,
1492 };
1493
1494 /*
1495 * h/w constraints
1496 */
1497
1498 #ifdef HW_CONST_DEBUG
1499 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1500 #else
1501 #define hwc_debug(fmt, args...) /**/
1502 #endif
1503
1504 static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp)
1505 {
1506 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1507 snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1508 snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1509
1510 /* check the format */
1511 if (! snd_mask_test(fmts, fp->format)) {
1512 hwc_debug(" > check: no supported format %d\n", fp->format);
1513 return 0;
1514 }
1515 /* check the channels */
1516 if (fp->channels < ct->min || fp->channels > ct->max) {
1517 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1518 return 0;
1519 }
1520 /* check the rate is within the range */
1521 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1522 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1523 return 0;
1524 }
1525 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1526 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1527 return 0;
1528 }
1529 return 1;
1530 }
1531
1532 static int hw_rule_rate(snd_pcm_hw_params_t *params,
1533 snd_pcm_hw_rule_t *rule)
1534 {
1535 snd_usb_substream_t *subs = rule->private;
1536 struct list_head *p;
1537 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1538 unsigned int rmin, rmax;
1539 int changed;
1540
1541 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1542 changed = 0;
1543 rmin = rmax = 0;
1544 list_for_each(p, &subs->fmt_list) {
1545 struct audioformat *fp;
1546 fp = list_entry(p, struct audioformat, list);
1547 if (! hw_check_valid_format(params, fp))
1548 continue;
1549 if (changed++) {
1550 if (rmin > fp->rate_min)
1551 rmin = fp->rate_min;
1552 if (rmax < fp->rate_max)
1553 rmax = fp->rate_max;
1554 } else {
1555 rmin = fp->rate_min;
1556 rmax = fp->rate_max;
1557 }
1558 }
1559
1560 if (! changed) {
1561 hwc_debug(" --> get empty\n");
1562 it->empty = 1;
1563 return -EINVAL;
1564 }
1565
1566 changed = 0;
1567 if (it->min < rmin) {
1568 it->min = rmin;
1569 it->openmin = 0;
1570 changed = 1;
1571 }
1572 if (it->max > rmax) {
1573 it->max = rmax;
1574 it->openmax = 0;
1575 changed = 1;
1576 }
1577 if (snd_interval_checkempty(it)) {
1578 it->empty = 1;
1579 return -EINVAL;
1580 }
1581 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1582 return changed;
1583 }
1584
1585
1586 static int hw_rule_channels(snd_pcm_hw_params_t *params,
1587 snd_pcm_hw_rule_t *rule)
1588 {
1589 snd_usb_substream_t *subs = rule->private;
1590 struct list_head *p;
1591 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1592 unsigned int rmin, rmax;
1593 int changed;
1594
1595 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1596 changed = 0;
1597 rmin = rmax = 0;
1598 list_for_each(p, &subs->fmt_list) {
1599 struct audioformat *fp;
1600 fp = list_entry(p, struct audioformat, list);
1601 if (! hw_check_valid_format(params, fp))
1602 continue;
1603 if (changed++) {
1604 if (rmin > fp->channels)
1605 rmin = fp->channels;
1606 if (rmax < fp->channels)
1607 rmax = fp->channels;
1608 } else {
1609 rmin = fp->channels;
1610 rmax = fp->channels;
1611 }
1612 }
1613
1614 if (! changed) {
1615 hwc_debug(" --> get empty\n");
1616 it->empty = 1;
1617 return -EINVAL;
1618 }
1619
1620 changed = 0;
1621 if (it->min < rmin) {
1622 it->min = rmin;
1623 it->openmin = 0;
1624 changed = 1;
1625 }
1626 if (it->max > rmax) {
1627 it->max = rmax;
1628 it->openmax = 0;
1629 changed = 1;
1630 }
1631 if (snd_interval_checkempty(it)) {
1632 it->empty = 1;
1633 return -EINVAL;
1634 }
1635 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1636 return changed;
1637 }
1638
1639 static int hw_rule_format(snd_pcm_hw_params_t *params,
1640 snd_pcm_hw_rule_t *rule)
1641 {
1642 snd_usb_substream_t *subs = rule->private;
1643 struct list_head *p;
1644 snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1645 u64 fbits;
1646 u32 oldbits[2];
1647 int changed;
1648
1649 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1650 fbits = 0;
1651 list_for_each(p, &subs->fmt_list) {
1652 struct audioformat *fp;
1653 fp = list_entry(p, struct audioformat, list);
1654 if (! hw_check_valid_format(params, fp))
1655 continue;
1656 fbits |= (1ULL << fp->format);
1657 }
1658
1659 oldbits[0] = fmt->bits[0];
1660 oldbits[1] = fmt->bits[1];
1661 fmt->bits[0] &= (u32)fbits;
1662 fmt->bits[1] &= (u32)(fbits >> 32);
1663 if (! fmt->bits[0] && ! fmt->bits[1]) {
1664 hwc_debug(" --> get empty\n");
1665 return -EINVAL;
1666 }
1667 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1668 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1669 return changed;
1670 }
1671
1672 #define MAX_MASK 64
1673
1674 /*
1675 * check whether the registered audio formats need special hw-constraints
1676 */
1677 static int check_hw_params_convention(snd_usb_substream_t *subs)
1678 {
1679 int i;
1680 u32 *channels;
1681 u32 *rates;
1682 u32 cmaster, rmaster;
1683 u32 rate_min = 0, rate_max = 0;
1684 struct list_head *p;
1685 int err = 1;
1686
1687 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1688 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1689
1690 list_for_each(p, &subs->fmt_list) {
1691 struct audioformat *f;
1692 f = list_entry(p, struct audioformat, list);
1693 /* unconventional channels? */
1694 if (f->channels > 32)
1695 goto __out;
1696 /* continuous rate min/max matches? */
1697 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1698 if (rate_min && f->rate_min != rate_min)
1699 goto __out;
1700 if (rate_max && f->rate_max != rate_max)
1701 goto __out;
1702 rate_min = f->rate_min;
1703 rate_max = f->rate_max;
1704 }
1705 /* combination of continuous rates and fixed rates? */
1706 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1707 if (f->rates != rates[f->format])
1708 goto __out;
1709 }
1710 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1711 if (rates[f->format] && rates[f->format] != f->rates)
1712 goto __out;
1713 }
1714 channels[f->format] |= (1 << f->channels);
1715 rates[f->format] |= f->rates;
1716 }
1717 /* check whether channels and rates match for all formats */
1718 cmaster = rmaster = 0;
1719 for (i = 0; i < MAX_MASK; i++) {
1720 if (cmaster != channels[i] && cmaster && channels[i])
1721 goto __out;
1722 if (rmaster != rates[i] && rmaster && rates[i])
1723 goto __out;
1724 if (channels[i])
1725 cmaster = channels[i];
1726 if (rates[i])
1727 rmaster = rates[i];
1728 }
1729 /* check whether channels match for all distinct rates */
1730 memset(channels, 0, MAX_MASK * sizeof(u32));
1731 list_for_each(p, &subs->fmt_list) {
1732 struct audioformat *f;
1733 f = list_entry(p, struct audioformat, list);
1734 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1735 continue;
1736 for (i = 0; i < 32; i++) {
1737 if (f->rates & (1 << i))
1738 channels[i] |= (1 << f->channels);
1739 }
1740 }
1741 cmaster = 0;
1742 for (i = 0; i < 32; i++) {
1743 if (cmaster != channels[i] && cmaster && channels[i])
1744 goto __out;
1745 if (channels[i])
1746 cmaster = channels[i];
1747 }
1748 err = 0;
1749
1750 __out:
1751 kfree(channels);
1752 kfree(rates);
1753 return err;
1754 }
1755
1756
1757 /*
1758 * set up the runtime hardware information.
1759 */
1760
1761 static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
1762 {
1763 struct list_head *p;
1764 int err;
1765
1766 runtime->hw.formats = subs->formats;
1767
1768 runtime->hw.rate_min = 0x7fffffff;
1769 runtime->hw.rate_max = 0;
1770 runtime->hw.channels_min = 256;
1771 runtime->hw.channels_max = 0;
1772 runtime->hw.rates = 0;
1773 /* check min/max rates and channels */
1774 list_for_each(p, &subs->fmt_list) {
1775 struct audioformat *fp;
1776 fp = list_entry(p, struct audioformat, list);
1777 runtime->hw.rates |= fp->rates;
1778 if (runtime->hw.rate_min > fp->rate_min)
1779 runtime->hw.rate_min = fp->rate_min;
1780 if (runtime->hw.rate_max < fp->rate_max)
1781 runtime->hw.rate_max = fp->rate_max;
1782 if (runtime->hw.channels_min > fp->channels)
1783 runtime->hw.channels_min = fp->channels;
1784 if (runtime->hw.channels_max < fp->channels)
1785 runtime->hw.channels_max = fp->channels;
1786 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1787 /* FIXME: there might be more than one audio formats... */
1788 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1789 fp->frame_size;
1790 }
1791 }
1792
1793 /* set the period time minimum 1ms */
1794 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1795 1000 * MIN_PACKS_URB,
1796 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1797
1798 if (check_hw_params_convention(subs)) {
1799 hwc_debug("setting extra hw constraints...\n");
1800 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1801 hw_rule_rate, subs,
1802 SNDRV_PCM_HW_PARAM_FORMAT,
1803 SNDRV_PCM_HW_PARAM_CHANNELS,
1804 -1)) < 0)
1805 return err;
1806 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1807 hw_rule_channels, subs,
1808 SNDRV_PCM_HW_PARAM_FORMAT,
1809 SNDRV_PCM_HW_PARAM_RATE,
1810 -1)) < 0)
1811 return err;
1812 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1813 hw_rule_format, subs,
1814 SNDRV_PCM_HW_PARAM_RATE,
1815 SNDRV_PCM_HW_PARAM_CHANNELS,
1816 -1)) < 0)
1817 return err;
1818 }
1819 return 0;
1820 }
1821
1822 static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
1823 snd_pcm_hardware_t *hw)
1824 {
1825 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1826 snd_pcm_runtime_t *runtime = substream->runtime;
1827 snd_usb_substream_t *subs = &as->substream[direction];
1828
1829 subs->interface = -1;
1830 subs->format = 0;
1831 runtime->hw = *hw;
1832 runtime->private_data = subs;
1833 subs->pcm_substream = substream;
1834 return setup_hw_info(runtime, subs);
1835 }
1836
1837 static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
1838 {
1839 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1840 snd_usb_substream_t *subs = &as->substream[direction];
1841
1842 if (subs->interface >= 0) {
1843 usb_set_interface(subs->dev, subs->interface, 0);
1844 subs->interface = -1;
1845 }
1846 subs->pcm_substream = NULL;
1847 return 0;
1848 }
1849
1850 static int snd_usb_playback_open(snd_pcm_substream_t *substream)
1851 {
1852 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1853 }
1854
1855 static int snd_usb_playback_close(snd_pcm_substream_t *substream)
1856 {
1857 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1858 }
1859
1860 static int snd_usb_capture_open(snd_pcm_substream_t *substream)
1861 {
1862 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1863 }
1864
1865 static int snd_usb_capture_close(snd_pcm_substream_t *substream)
1866 {
1867 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1868 }
1869
1870 static snd_pcm_ops_t snd_usb_playback_ops = {
1871 .open = snd_usb_playback_open,
1872 .close = snd_usb_playback_close,
1873 .ioctl = snd_pcm_lib_ioctl,
1874 .hw_params = snd_usb_hw_params,
1875 .hw_free = snd_usb_hw_free,
1876 .prepare = snd_usb_pcm_prepare,
1877 .trigger = snd_usb_pcm_playback_trigger,
1878 .pointer = snd_usb_pcm_pointer,
1879 .page = snd_pcm_get_vmalloc_page,
1880 };
1881
1882 static snd_pcm_ops_t snd_usb_capture_ops = {
1883 .open = snd_usb_capture_open,
1884 .close = snd_usb_capture_close,
1885 .ioctl = snd_pcm_lib_ioctl,
1886 .hw_params = snd_usb_hw_params,
1887 .hw_free = snd_usb_hw_free,
1888 .prepare = snd_usb_pcm_prepare,
1889 .trigger = snd_usb_pcm_capture_trigger,
1890 .pointer = snd_usb_pcm_pointer,
1891 .page = snd_pcm_get_vmalloc_page,
1892 };
1893
1894
1895
1896 /*
1897 * helper functions
1898 */
1899
1900 /*
1901 * combine bytes and get an integer value
1902 */
1903 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1904 {
1905 switch (size) {
1906 case 1: return *bytes;
1907 case 2: return combine_word(bytes);
1908 case 3: return combine_triple(bytes);
1909 case 4: return combine_quad(bytes);
1910 default: return 0;
1911 }
1912 }
1913
1914 /*
1915 * parse descriptor buffer and return the pointer starting the given
1916 * descriptor type.
1917 */
1918 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1919 {
1920 u8 *p, *end, *next;
1921
1922 p = descstart;
1923 end = p + desclen;
1924 for (; p < end;) {
1925 if (p[0] < 2)
1926 return NULL;
1927 next = p + p[0];
1928 if (next > end)
1929 return NULL;
1930 if (p[1] == dtype && (!after || (void *)p > after)) {
1931 return p;
1932 }
1933 p = next;
1934 }
1935 return NULL;
1936 }
1937
1938 /*
1939 * find a class-specified interface descriptor with the given subtype.
1940 */
1941 void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1942 {
1943 unsigned char *p = after;
1944
1945 while ((p = snd_usb_find_desc(buffer, buflen, p,
1946 USB_DT_CS_INTERFACE)) != NULL) {
1947 if (p[0] >= 3 && p[2] == dsubtype)
1948 return p;
1949 }
1950 return NULL;
1951 }
1952
1953 /*
1954 * Wrapper for usb_control_msg().
1955 * Allocates a temp buffer to prevent dmaing from/to the stack.
1956 */
1957 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1958 __u8 requesttype, __u16 value, __u16 index, void *data,
1959 __u16 size, int timeout)
1960 {
1961 int err;
1962 void *buf = NULL;
1963
1964 if (size > 0) {
1965 buf = kmalloc(size, GFP_KERNEL);
1966 if (!buf)
1967 return -ENOMEM;
1968 memcpy(buf, data, size);
1969 }
1970 err = usb_control_msg(dev, pipe, request, requesttype,
1971 value, index, buf, size, timeout);
1972 if (size > 0) {
1973 memcpy(data, buf, size);
1974 kfree(buf);
1975 }
1976 return err;
1977 }
1978
1979
1980 /*
1981 * entry point for linux usb interface
1982 */
1983
1984 static int usb_audio_probe(struct usb_interface *intf,
1985 const struct usb_device_id *id);
1986 static void usb_audio_disconnect(struct usb_interface *intf);
1987
1988 static struct usb_device_id usb_audio_ids [] = {
1989 #include "usbquirks.h"
1990 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1991 .bInterfaceClass = USB_CLASS_AUDIO,
1992 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
1993 { } /* Terminating entry */
1994 };
1995
1996 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
1997
1998 static struct usb_driver usb_audio_driver = {
1999 .owner = THIS_MODULE,
2000 .name = "snd-usb-audio",
2001 .probe = usb_audio_probe,
2002 .disconnect = usb_audio_disconnect,
2003 .id_table = usb_audio_ids,
2004 };
2005
2006
2007 /*
2008 * proc interface for list the supported pcm formats
2009 */
2010 static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
2011 {
2012 struct list_head *p;
2013 static char *sync_types[4] = {
2014 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2015 };
2016
2017 list_for_each(p, &subs->fmt_list) {
2018 struct audioformat *fp;
2019 fp = list_entry(p, struct audioformat, list);
2020 snd_iprintf(buffer, " Interface %d\n", fp->iface);
2021 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
2022 snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
2023 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
2024 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
2025 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2026 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2027 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2028 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2029 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2030 fp->rate_min, fp->rate_max);
2031 } else {
2032 unsigned int i;
2033 snd_iprintf(buffer, " Rates: ");
2034 for (i = 0; i < fp->nr_rates; i++) {
2035 if (i > 0)
2036 snd_iprintf(buffer, ", ");
2037 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2038 }
2039 snd_iprintf(buffer, "\n");
2040 }
2041 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2042 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2043 }
2044 }
2045
2046 static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
2047 {
2048 if (subs->running) {
2049 unsigned int i;
2050 snd_iprintf(buffer, " Status: Running\n");
2051 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2052 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2053 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2054 for (i = 0; i < subs->nurbs; i++)
2055 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2056 snd_iprintf(buffer, "]\n");
2057 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
2058 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
2059 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2060 ? get_full_speed_hz(subs->freqm)
2061 : get_high_speed_hz(subs->freqm),
2062 subs->freqm >> 16, subs->freqm & 0xffff);
2063 } else {
2064 snd_iprintf(buffer, " Status: Stop\n");
2065 }
2066 }
2067
2068 static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
2069 {
2070 snd_usb_stream_t *stream = entry->private_data;
2071
2072 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2073
2074 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2075 snd_iprintf(buffer, "\nPlayback:\n");
2076 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2077 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2078 }
2079 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2080 snd_iprintf(buffer, "\nCapture:\n");
2081 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2082 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2083 }
2084 }
2085
2086 static void proc_pcm_format_add(snd_usb_stream_t *stream)
2087 {
2088 snd_info_entry_t *entry;
2089 char name[32];
2090 snd_card_t *card = stream->chip->card;
2091
2092 sprintf(name, "stream%d", stream->pcm_index);
2093 if (! snd_card_proc_new(card, name, &entry))
2094 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2095 }
2096
2097
2098 /*
2099 * initialize the substream instance.
2100 */
2101
2102 static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp)
2103 {
2104 snd_usb_substream_t *subs = &as->substream[stream];
2105
2106 INIT_LIST_HEAD(&subs->fmt_list);
2107 spin_lock_init(&subs->lock);
2108
2109 subs->stream = as;
2110 subs->direction = stream;
2111 subs->dev = as->chip->dev;
2112 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2113 subs->ops = audio_urb_ops[stream];
2114 else
2115 subs->ops = audio_urb_ops_high_speed[stream];
2116 snd_pcm_set_ops(as->pcm, stream,
2117 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2118 &snd_usb_playback_ops : &snd_usb_capture_ops);
2119
2120 list_add_tail(&fp->list, &subs->fmt_list);
2121 subs->formats |= 1ULL << fp->format;
2122 subs->endpoint = fp->endpoint;
2123 subs->num_formats++;
2124 subs->fmt_type = fp->fmt_type;
2125 }
2126
2127
2128 /*
2129 * free a substream
2130 */
2131 static void free_substream(snd_usb_substream_t *subs)
2132 {
2133 struct list_head *p, *n;
2134
2135 if (! subs->num_formats)
2136 return; /* not initialized */
2137 list_for_each_safe(p, n, &subs->fmt_list) {
2138 struct audioformat *fp = list_entry(p, struct audioformat, list);
2139 kfree(fp->rate_table);
2140 kfree(fp);
2141 }
2142 }
2143
2144
2145 /*
2146 * free a usb stream instance
2147 */
2148 static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
2149 {
2150 free_substream(&stream->substream[0]);
2151 free_substream(&stream->substream[1]);
2152 list_del(&stream->list);
2153 kfree(stream);
2154 }
2155
2156 static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
2157 {
2158 snd_usb_stream_t *stream = pcm->private_data;
2159 if (stream) {
2160 stream->pcm = NULL;
2161 snd_usb_audio_stream_free(stream);
2162 }
2163 }
2164
2165
2166 /*
2167 * add this endpoint to the chip instance.
2168 * if a stream with the same endpoint already exists, append to it.
2169 * if not, create a new pcm stream.
2170 */
2171 static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp)
2172 {
2173 struct list_head *p;
2174 snd_usb_stream_t *as;
2175 snd_usb_substream_t *subs;
2176 snd_pcm_t *pcm;
2177 int err;
2178
2179 list_for_each(p, &chip->pcm_list) {
2180 as = list_entry(p, snd_usb_stream_t, list);
2181 if (as->fmt_type != fp->fmt_type)
2182 continue;
2183 subs = &as->substream[stream];
2184 if (! subs->endpoint)
2185 continue;
2186 if (subs->endpoint == fp->endpoint) {
2187 list_add_tail(&fp->list, &subs->fmt_list);
2188 subs->num_formats++;
2189 subs->formats |= 1ULL << fp->format;
2190 return 0;
2191 }
2192 }
2193 /* look for an empty stream */
2194 list_for_each(p, &chip->pcm_list) {
2195 as = list_entry(p, snd_usb_stream_t, list);
2196 if (as->fmt_type != fp->fmt_type)
2197 continue;
2198 subs = &as->substream[stream];
2199 if (subs->endpoint)
2200 continue;
2201 err = snd_pcm_new_stream(as->pcm, stream, 1);
2202 if (err < 0)
2203 return err;
2204 init_substream(as, stream, fp);
2205 return 0;
2206 }
2207
2208 /* create a new pcm */
2209 as = kmalloc(sizeof(*as), GFP_KERNEL);
2210 if (! as)
2211 return -ENOMEM;
2212 memset(as, 0, sizeof(*as));
2213 as->pcm_index = chip->pcm_devs;
2214 as->chip = chip;
2215 as->fmt_type = fp->fmt_type;
2216 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2217 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2218 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2219 &pcm);
2220 if (err < 0) {
2221 kfree(as);
2222 return err;
2223 }
2224 as->pcm = pcm;
2225 pcm->private_data = as;
2226 pcm->private_free = snd_usb_audio_pcm_free;
2227 pcm->info_flags = 0;
2228 if (chip->pcm_devs > 0)
2229 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2230 else
2231 strcpy(pcm->name, "USB Audio");
2232
2233 init_substream(as, stream, fp);
2234
2235 list_add(&as->list, &chip->pcm_list);
2236 chip->pcm_devs++;
2237
2238 proc_pcm_format_add(as);
2239
2240 return 0;
2241 }
2242
2243
2244 /*
2245 * check if the device uses big-endian samples
2246 */
2247 static int is_big_endian_format(snd_usb_audio_t *chip, struct audioformat *fp)
2248 {
2249 switch (chip->usb_id) {
2250 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2251 if (fp->endpoint & USB_DIR_IN)
2252 return 1;
2253 break;
2254 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2255 return 1;
2256 }
2257 return 0;
2258 }
2259
2260 /*
2261 * parse the audio format type I descriptor
2262 * and returns the corresponding pcm format
2263 *
2264 * @dev: usb device
2265 * @fp: audioformat record
2266 * @format: the format tag (wFormatTag)
2267 * @fmt: the format type descriptor
2268 */
2269 static int parse_audio_format_i_type(snd_usb_audio_t *chip, struct audioformat *fp,
2270 int format, unsigned char *fmt)
2271 {
2272 int pcm_format;
2273 int sample_width, sample_bytes;
2274
2275 /* FIXME: correct endianess and sign? */
2276 pcm_format = -1;
2277 sample_width = fmt[6];
2278 sample_bytes = fmt[5];
2279 switch (format) {
2280 case 0: /* some devices don't define this correctly... */
2281 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
2282 chip->dev->devnum, fp->iface, fp->altsetting);
2283 /* fall-through */
2284 case USB_AUDIO_FORMAT_PCM:
2285 if (sample_width > sample_bytes * 8) {
2286 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2287 chip->dev->devnum, fp->iface, fp->altsetting,
2288 sample_width, sample_bytes);
2289 }
2290 /* check the format byte size */
2291 switch (fmt[5]) {
2292 case 1:
2293 pcm_format = SNDRV_PCM_FORMAT_S8;
2294 break;
2295 case 2:
2296 if (is_big_endian_format(chip, fp))
2297 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2298 else
2299 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2300 break;
2301 case 3:
2302 if (is_big_endian_format(chip, fp))
2303 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2304 else
2305 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2306 break;
2307 case 4:
2308 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2309 break;
2310 default:
2311 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2312 chip->dev->devnum, fp->iface,
2313 fp->altsetting, sample_width, sample_bytes);
2314 break;
2315 }
2316 break;
2317 case USB_AUDIO_FORMAT_PCM8:
2318 /* Dallas DS4201 workaround */
2319 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
2320 pcm_format = SNDRV_PCM_FORMAT_S8;
2321 else
2322 pcm_format = SNDRV_PCM_FORMAT_U8;
2323 break;
2324 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2325 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2326 break;
2327 case USB_AUDIO_FORMAT_ALAW:
2328 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2329 break;
2330 case USB_AUDIO_FORMAT_MU_LAW:
2331 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2332 break;
2333 default:
2334 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
2335 chip->dev->devnum, fp->iface, fp->altsetting, format);
2336 break;
2337 }
2338 return pcm_format;
2339 }
2340
2341
2342 /*
2343 * parse the format descriptor and stores the possible sample rates
2344 * on the audioformat table.
2345 *
2346 * @dev: usb device
2347 * @fp: audioformat record
2348 * @fmt: the format descriptor
2349 * @offset: the start offset of descriptor pointing the rate type
2350 * (7 for type I and II, 8 for type II)
2351 */
2352 static int parse_audio_format_rates(snd_usb_audio_t *chip, struct audioformat *fp,
2353 unsigned char *fmt, int offset)
2354 {
2355 int nr_rates = fmt[offset];
2356 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2357 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2358 chip->dev->devnum, fp->iface, fp->altsetting);
2359 return -1;
2360 }
2361
2362 if (nr_rates) {
2363 /*
2364 * build the rate table and bitmap flags
2365 */
2366 int r, idx, c;
2367 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2368 static unsigned int conv_rates[] = {
2369 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2370 64000, 88200, 96000, 176400, 192000
2371 };
2372 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2373 if (fp->rate_table == NULL) {
2374 snd_printk(KERN_ERR "cannot malloc\n");
2375 return -1;
2376 }
2377
2378 fp->nr_rates = nr_rates;
2379 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2380 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2381 unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2382 if (rate < fp->rate_min)
2383 fp->rate_min = rate;
2384 else if (rate > fp->rate_max)
2385 fp->rate_max = rate;
2386 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2387 if (rate == conv_rates[c]) {
2388 fp->rates |= (1 << c);
2389 break;
2390 }
2391 }
2392 }
2393 } else {
2394 /* continuous rates */
2395 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2396 fp->rate_min = combine_triple(&fmt[offset + 1]);
2397 fp->rate_max = combine_triple(&fmt[offset + 4]);
2398 }
2399 return 0;
2400 }
2401
2402 /*
2403 * parse the format type I and III descriptors
2404 */
2405 static int parse_audio_format_i(snd_usb_audio_t *chip, struct audioformat *fp,
2406 int format, unsigned char *fmt)
2407 {
2408 int pcm_format;
2409
2410 if (fmt[3] == USB_FORMAT_TYPE_III) {
2411 /* FIXME: the format type is really IECxxx
2412 * but we give normal PCM format to get the existing
2413 * apps working...
2414 */
2415 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2416 } else {
2417 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
2418 if (pcm_format < 0)
2419 return -1;
2420 }
2421 fp->format = pcm_format;
2422 fp->channels = fmt[4];
2423 if (fp->channels < 1) {
2424 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
2425 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
2426 return -1;
2427 }
2428 return parse_audio_format_rates(chip, fp, fmt, 7);
2429 }
2430
2431 /*
2432 * prase the format type II descriptor
2433 */
2434 static int parse_audio_format_ii(snd_usb_audio_t *chip, struct audioformat *fp,
2435 int format, unsigned char *fmt)
2436 {
2437 int brate, framesize;
2438 switch (format) {
2439 case USB_AUDIO_FORMAT_AC3:
2440 /* FIXME: there is no AC3 format defined yet */
2441 // fp->format = SNDRV_PCM_FORMAT_AC3;
2442 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2443 break;
2444 case USB_AUDIO_FORMAT_MPEG:
2445 fp->format = SNDRV_PCM_FORMAT_MPEG;
2446 break;
2447 default:
2448 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
2449 chip->dev->devnum, fp->iface, fp->altsetting, format);
2450 fp->format = SNDRV_PCM_FORMAT_MPEG;
2451 break;
2452 }
2453 fp->channels = 1;
2454 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2455 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2456 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2457 fp->frame_size = framesize;
2458 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
2459 }
2460
2461 static int parse_audio_format(snd_usb_audio_t *chip, struct audioformat *fp,
2462 int format, unsigned char *fmt, int stream)
2463 {
2464 int err;
2465
2466 switch (fmt[3]) {
2467 case USB_FORMAT_TYPE_I:
2468 case USB_FORMAT_TYPE_III:
2469 err = parse_audio_format_i(chip, fp, format, fmt);
2470 break;
2471 case USB_FORMAT_TYPE_II:
2472 err = parse_audio_format_ii(chip, fp, format, fmt);
2473 break;
2474 default:
2475 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
2476 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
2477 return -1;
2478 }
2479 fp->fmt_type = fmt[3];
2480 if (err < 0)
2481 return err;
2482 #if 1
2483 /* FIXME: temporary hack for extigy/audigy 2 nx */
2484 /* extigy apparently supports sample rates other than 48k
2485 * but not in ordinary way. so we enable only 48k atm.
2486 */
2487 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2488 chip->usb_id == USB_ID(0x041e, 0x3020)) {
2489 if (fmt[3] == USB_FORMAT_TYPE_I &&
2490 fp->rates != SNDRV_PCM_RATE_48000 &&
2491 fp->rates != SNDRV_PCM_RATE_96000)
2492 return -1;
2493 }
2494 #endif
2495 return 0;
2496 }
2497
2498 static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
2499 {
2500 struct usb_device *dev;
2501 struct usb_interface *iface;
2502 struct usb_host_interface *alts;
2503 struct usb_interface_descriptor *altsd;
2504 int i, altno, err, stream;
2505 int format;
2506 struct audioformat *fp;
2507 unsigned char *fmt, *csep;
2508
2509 dev = chip->dev;
2510
2511 /* parse the interface's altsettings */
2512 iface = usb_ifnum_to_if(dev, iface_no);
2513 for (i = 0; i < iface->num_altsetting; i++) {
2514 alts = &iface->altsetting[i];
2515 altsd = get_iface_desc(alts);
2516 /* skip invalid one */
2517 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2518 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2519 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2520 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2521 altsd->bNumEndpoints < 1 ||
2522 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2523 continue;
2524 /* must be isochronous */
2525 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2526 USB_ENDPOINT_XFER_ISOC)
2527 continue;
2528 /* check direction */
2529 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2530 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2531 altno = altsd->bAlternateSetting;
2532
2533 /* get audio formats */
2534 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2535 if (!fmt) {
2536 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2537 dev->devnum, iface_no, altno);
2538 continue;
2539 }
2540
2541 if (fmt[0] < 7) {
2542 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2543 dev->devnum, iface_no, altno);
2544 continue;
2545 }
2546
2547 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2548
2549 /* get format type */
2550 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2551 if (!fmt) {
2552 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2553 dev->devnum, iface_no, altno);
2554 continue;
2555 }
2556 if (fmt[0] < 8) {
2557 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2558 dev->devnum, iface_no, altno);
2559 continue;
2560 }
2561
2562 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2563 /* Creamware Noah has this descriptor after the 2nd endpoint */
2564 if (!csep && altsd->bNumEndpoints >= 2)
2565 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2566 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2567 snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2568 dev->devnum, iface_no, altno);
2569 continue;
2570 }
2571
2572 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2573 if (! fp) {
2574 snd_printk(KERN_ERR "cannot malloc\n");
2575 return -ENOMEM;
2576 }
2577
2578 memset(fp, 0, sizeof(*fp));
2579 fp->iface = iface_no;
2580 fp->altsetting = altno;
2581 fp->altset_idx = i;
2582 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2583 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2584 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2585 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2586 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2587 * (fp->maxpacksize & 0x7ff);
2588 fp->attributes = csep[3];
2589
2590 /* some quirks for attributes here */
2591
2592 switch (chip->usb_id) {
2593 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2594 /* Optoplay sets the sample rate attribute although
2595 * it seems not supporting it in fact.
2596 */
2597 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
2598 break;
2599 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2600 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2601 /* doesn't set the sample rate attribute, but supports it */
2602 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
2603 break;
2604 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2605 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2606 an older model 77d:223) */
2607 /*
2608 * plantronics headset and Griffin iMic have set adaptive-in
2609 * although it's really not...
2610 */
2611 fp->ep_attr &= ~EP_ATTR_MASK;
2612 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2613 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2614 else
2615 fp->ep_attr |= EP_ATTR_SYNC;
2616 break;
2617 }
2618
2619 /* ok, let's parse further... */
2620 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
2621 kfree(fp->rate_table);
2622 kfree(fp);
2623 continue;
2624 }
2625
2626 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2627 err = add_audio_endpoint(chip, stream, fp);
2628 if (err < 0) {
2629 kfree(fp->rate_table);
2630 kfree(fp);
2631 return err;
2632 }
2633 /* try to set the interface... */
2634 usb_set_interface(chip->dev, iface_no, altno);
2635 init_usb_pitch(chip->dev, iface_no, alts, fp);
2636 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2637 }
2638 return 0;
2639 }
2640
2641
2642 /*
2643 * disconnect streams
2644 * called from snd_usb_audio_disconnect()
2645 */
2646 static void snd_usb_stream_disconnect(struct list_head *head)
2647 {
2648 int idx;
2649 snd_usb_stream_t *as;
2650 snd_usb_substream_t *subs;
2651
2652 as = list_entry(head, snd_usb_stream_t, list);
2653 for (idx = 0; idx < 2; idx++) {
2654 subs = &as->substream[idx];
2655 if (!subs->num_formats)
2656 return;
2657 release_substream_urbs(subs, 1);
2658 subs->interface = -1;
2659 }
2660 }
2661
2662 /*
2663 * parse audio control descriptor and create pcm/midi streams
2664 */
2665 static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
2666 {
2667 struct usb_device *dev = chip->dev;
2668 struct usb_host_interface *host_iface;
2669 struct usb_interface *iface;
2670 unsigned char *p1;
2671 int i, j;
2672
2673 /* find audiocontrol interface */
2674 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2675 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2676 snd_printk(KERN_ERR "cannot find HEADER\n");
2677 return -EINVAL;
2678 }
2679 if (! p1[7] || p1[0] < 8 + p1[7]) {
2680 snd_printk(KERN_ERR "invalid HEADER\n");
2681 return -EINVAL;
2682 }
2683
2684 /*
2685 * parse all USB audio streaming interfaces
2686 */
2687 for (i = 0; i < p1[7]; i++) {
2688 struct usb_host_interface *alts;
2689 struct usb_interface_descriptor *altsd;
2690 j = p1[8 + i];
2691 iface = usb_ifnum_to_if(dev, j);
2692 if (!iface) {
2693 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2694 dev->devnum, ctrlif, j);
2695 continue;
2696 }
2697 if (usb_interface_claimed(iface)) {
2698 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2699 continue;
2700 }
2701 alts = &iface->altsetting[0];
2702 altsd = get_iface_desc(alts);
2703 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2704 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2705 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2706 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2707 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2708 continue;
2709 }
2710 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2711 continue;
2712 }
2713 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2714 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2715 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2716 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2717 /* skip non-supported classes */
2718 continue;
2719 }
2720 if (! parse_audio_endpoints(chip, j)) {
2721 usb_set_interface(dev, j, 0); /* reset the current interface */
2722 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2723 }
2724 }
2725
2726 return 0;
2727 }
2728
2729 /*
2730 * create a stream for an endpoint/altsetting without proper descriptors
2731 */
2732 static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
2733 struct usb_interface *iface,
2734 const snd_usb_audio_quirk_t *quirk)
2735 {
2736 struct audioformat *fp;
2737 struct usb_host_interface *alts;
2738 int stream, err;
2739 int *rate_table = NULL;
2740
2741 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2742 if (! fp) {
2743 snd_printk(KERN_ERR "cannot malloc\n");
2744 return -ENOMEM;
2745 }
2746 memcpy(fp, quirk->data, sizeof(*fp));
2747 if (fp->nr_rates > 0) {
2748 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2749 if (!rate_table) {
2750 kfree(fp);
2751 return -ENOMEM;
2752 }
2753 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2754 fp->rate_table = rate_table;
2755 }
2756
2757 stream = (fp->endpoint & USB_DIR_IN)
2758 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2759 err = add_audio_endpoint(chip, stream, fp);
2760 if (err < 0) {
2761 kfree(fp);
2762 kfree(rate_table);
2763 return err;
2764 }
2765 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2766 fp->altset_idx >= iface->num_altsetting) {
2767 kfree(fp);
2768 kfree(rate_table);
2769 return -EINVAL;
2770 }
2771 alts = &iface->altsetting[fp->altset_idx];
2772 usb_set_interface(chip->dev, fp->iface, 0);
2773 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2774 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2775 return 0;
2776 }
2777
2778 /*
2779 * create a stream for an interface with proper descriptors
2780 */
2781 static int create_standard_audio_quirk(snd_usb_audio_t *chip,
2782 struct usb_interface *iface,
2783 const snd_usb_audio_quirk_t *quirk)
2784 {
2785 struct usb_host_interface *alts;
2786 struct usb_interface_descriptor *altsd;
2787 int err;
2788
2789 alts = &iface->altsetting[0];
2790 altsd = get_iface_desc(alts);
2791 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
2792 if (err < 0) {
2793 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2794 altsd->bInterfaceNumber, err);
2795 return err;
2796 }
2797 /* reset the current interface */
2798 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
2799 return 0;
2800 }
2801
2802 /*
2803 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2804 * to detect the sample rate is by looking at wMaxPacketSize.
2805 */
2806 static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
2807 struct usb_interface *iface,
2808 const snd_usb_audio_quirk_t *quirk)
2809 {
2810 static const struct audioformat ua_format = {
2811 .format = SNDRV_PCM_FORMAT_S24_3LE,
2812 .channels = 2,
2813 .fmt_type = USB_FORMAT_TYPE_I,
2814 .altsetting = 1,
2815 .altset_idx = 1,
2816 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2817 };
2818 struct usb_host_interface *alts;
2819 struct usb_interface_descriptor *altsd;
2820 struct audioformat *fp;
2821 int stream, err;
2822
2823 /* both PCM and MIDI interfaces have 2 altsettings */
2824 if (iface->num_altsetting != 2)
2825 return -ENXIO;
2826 alts = &iface->altsetting[1];
2827 altsd = get_iface_desc(alts);
2828
2829 if (altsd->bNumEndpoints == 2) {
2830 static const snd_usb_midi_endpoint_info_t ua700_ep = {
2831 .out_cables = 0x0003,
2832 .in_cables = 0x0003
2833 };
2834 static const snd_usb_audio_quirk_t ua700_quirk = {
2835 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2836 .data = &ua700_ep
2837 };
2838 static const snd_usb_midi_endpoint_info_t ua25_ep = {
2839 .out_cables = 0x0001,
2840 .in_cables = 0x0001
2841 };
2842 static const snd_usb_audio_quirk_t ua25_quirk = {
2843 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2844 .data = &ua25_ep
2845 };
2846 if (chip->usb_id == USB_ID(0x0582, 0x002b))
2847 return snd_usb_create_midi_interface(chip, iface,
2848 &ua700_quirk);
2849 else
2850 return snd_usb_create_midi_interface(chip, iface,
2851 &ua25_quirk);
2852 }
2853
2854 if (altsd->bNumEndpoints != 1)
2855 return -ENXIO;
2856
2857 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2858 if (!fp)
2859 return -ENOMEM;
2860 memcpy(fp, &ua_format, sizeof(*fp));
2861
2862 fp->iface = altsd->bInterfaceNumber;
2863 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2864 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2865 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2866
2867 switch (fp->maxpacksize) {
2868 case 0x120:
2869 fp->rate_max = fp->rate_min = 44100;
2870 break;
2871 case 0x138:
2872 case 0x140:
2873 fp->rate_max = fp->rate_min = 48000;
2874 break;
2875 case 0x258:
2876 case 0x260:
2877 fp->rate_max = fp->rate_min = 96000;
2878 break;
2879 default:
2880 snd_printk(KERN_ERR "unknown sample rate\n");
2881 kfree(fp);
2882 return -ENXIO;
2883 }
2884
2885 stream = (fp->endpoint & USB_DIR_IN)
2886 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2887 err = add_audio_endpoint(chip, stream, fp);
2888 if (err < 0) {
2889 kfree(fp);
2890 return err;
2891 }
2892 usb_set_interface(chip->dev, fp->iface, 0);
2893 return 0;
2894 }
2895
2896 /*
2897 * Create a stream for an Edirol UA-1000 interface.
2898 */
2899 static int create_ua1000_quirk(snd_usb_audio_t *chip,
2900 struct usb_interface *iface,
2901 const snd_usb_audio_quirk_t *quirk)
2902 {
2903 static const struct audioformat ua1000_format = {
2904 .format = SNDRV_PCM_FORMAT_S32_LE,
2905 .fmt_type = USB_FORMAT_TYPE_I,
2906 .altsetting = 1,
2907 .altset_idx = 1,
2908 .attributes = 0,
2909 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2910 };
2911 struct usb_host_interface *alts;
2912 struct usb_interface_descriptor *altsd;
2913 struct audioformat *fp;
2914 int stream, err;
2915
2916 if (iface->num_altsetting != 2)
2917 return -ENXIO;
2918 alts = &iface->altsetting[1];
2919 altsd = get_iface_desc(alts);
2920 if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2921 altsd->bNumEndpoints != 1)
2922 return -ENXIO;
2923
2924 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2925 if (!fp)
2926 return -ENOMEM;
2927 memcpy(fp, &ua1000_format, sizeof(*fp));
2928
2929 fp->channels = alts->extra[4];
2930 fp->iface = altsd->bInterfaceNumber;
2931 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2932 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2933 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2934 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2935
2936 stream = (fp->endpoint & USB_DIR_IN)
2937 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2938 err = add_audio_endpoint(chip, stream, fp);
2939 if (err < 0) {
2940 kfree(fp);
2941 return err;
2942 }
2943 /* FIXME: playback must be synchronized to capture */
2944 usb_set_interface(chip->dev, fp->iface, 0);
2945 return 0;
2946 }
2947
2948 static int snd_usb_create_quirk(snd_usb_audio_t *chip,
2949 struct usb_interface *iface,
2950 const snd_usb_audio_quirk_t *quirk);
2951
2952 /*
2953 * handle the quirks for the contained interfaces
2954 */
2955 static int create_composite_quirk(snd_usb_audio_t *chip,
2956 struct usb_interface *iface,
2957 const snd_usb_audio_quirk_t *quirk)
2958 {
2959 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2960 int err;
2961
2962 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2963 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2964 if (!iface)
2965 continue;
2966 if (quirk->ifnum != probed_ifnum &&
2967 usb_interface_claimed(iface))
2968 continue;
2969 err = snd_usb_create_quirk(chip, iface, quirk);
2970 if (err < 0)
2971 return err;
2972 if (quirk->ifnum != probed_ifnum)
2973 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2974 }
2975 return 0;
2976 }
2977
2978 static int ignore_interface_quirk(snd_usb_audio_t *chip,
2979 struct usb_interface *iface,
2980 const snd_usb_audio_quirk_t *quirk)
2981 {
2982 return 0;
2983 }
2984
2985
2986 /*
2987 * boot quirks
2988 */
2989
2990 #define EXTIGY_FIRMWARE_SIZE_OLD 794
2991 #define EXTIGY_FIRMWARE_SIZE_NEW 483
2992
2993 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
2994 {
2995 struct usb_host_config *config = dev->actconfig;
2996 int err;
2997
2998 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
2999 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
3000 snd_printdd("sending Extigy boot sequence...\n");
3001 /* Send message to force it to reconnect with full interface. */
3002 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3003 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3004 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3005 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3006 &dev->descriptor, sizeof(dev->descriptor));
3007 config = dev->actconfig;
3008 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3009 err = usb_reset_configuration(dev);
3010 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3011 snd_printdd("extigy_boot: new boot length = %d\n",
3012 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3013 return -ENODEV; /* quit this anyway */
3014 }
3015 return 0;
3016 }
3017
3018 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3019 {
3020 u8 buf = 1;
3021
3022 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3023 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3024 0, 0, &buf, 1, 1000);
3025 if (buf == 0) {
3026 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3027 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3028 1, 2000, NULL, 0, 1000);
3029 return -ENODEV;
3030 }
3031 return 0;
3032 }
3033
3034
3035 /*
3036 * audio-interface quirks
3037 *
3038 * returns zero if no standard audio/MIDI parsing is needed.
3039 * returns a postive value if standard audio/midi interfaces are parsed
3040 * after this.
3041 * returns a negative value at error.
3042 */
3043 static int snd_usb_create_quirk(snd_usb_audio_t *chip,
3044 struct usb_interface *iface,
3045 const snd_usb_audio_quirk_t *quirk)
3046 {
3047 typedef int (*quirk_func_t)(snd_usb_audio_t *, struct usb_interface *,
3048 const snd_usb_audio_quirk_t *);
3049 static const quirk_func_t quirk_funcs[] = {
3050 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3051 [QUIRK_COMPOSITE] = create_composite_quirk,
3052 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3053 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3054 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3055 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3056 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3057 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3058 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3059 [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface,
3060 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
3061 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3062 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3063 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3064 };
3065
3066 if (quirk->type < QUIRK_TYPE_COUNT) {
3067 return quirk_funcs[quirk->type](chip, iface, quirk);
3068 } else {
3069 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3070 return -ENXIO;
3071 }
3072 }
3073
3074
3075 /*
3076 * common proc files to show the usb device info
3077 */
3078 static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3079 {
3080 snd_usb_audio_t *chip = entry->private_data;
3081 if (! chip->shutdown)
3082 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3083 }
3084
3085 static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3086 {
3087 snd_usb_audio_t *chip = entry->private_data;
3088 if (! chip->shutdown)
3089 snd_iprintf(buffer, "%04x:%04x\n",
3090 USB_ID_VENDOR(chip->usb_id),
3091 USB_ID_PRODUCT(chip->usb_id));
3092 }
3093
3094 static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
3095 {
3096 snd_info_entry_t *entry;
3097 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3098 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3099 if (! snd_card_proc_new(chip->card, "usbid", &entry))
3100 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3101 }
3102
3103 /*
3104 * free the chip instance
3105 *
3106 * here we have to do not much, since pcm and controls are already freed
3107 *
3108 */
3109
3110 static int snd_usb_audio_free(snd_usb_audio_t *chip)
3111 {
3112 kfree(chip);
3113 return 0;
3114 }
3115
3116 static int snd_usb_audio_dev_free(snd_device_t *device)
3117 {
3118 snd_usb_audio_t *chip = device->device_data;
3119 return snd_usb_audio_free(chip);
3120 }
3121
3122
3123 /*
3124 * create a chip instance and set its names.
3125 */
3126 static int snd_usb_audio_create(struct usb_device *dev, int idx,
3127 const snd_usb_audio_quirk_t *quirk,
3128 snd_usb_audio_t **rchip)
3129 {
3130 snd_card_t *card;
3131 snd_usb_audio_t *chip;
3132 int err, len;
3133 char component[14];
3134 static snd_device_ops_t ops = {
3135 .dev_free = snd_usb_audio_dev_free,
3136 };
3137
3138 *rchip = NULL;
3139
3140 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3141 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3142 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3143 return -ENXIO;
3144 }
3145
3146 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3147 if (card == NULL) {
3148 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3149 return -ENOMEM;
3150 }
3151
3152 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
3153 if (! chip) {
3154 snd_card_free(card);
3155 return -ENOMEM;
3156 }
3157
3158 chip->index = idx;
3159 chip->dev = dev;
3160 chip->card = card;
3161 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3162 le16_to_cpu(dev->descriptor.idProduct));
3163 INIT_LIST_HEAD(&chip->pcm_list);
3164 INIT_LIST_HEAD(&chip->midi_list);
3165 INIT_LIST_HEAD(&chip->mixer_list);
3166
3167 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3168 snd_usb_audio_free(chip);
3169 snd_card_free(card);
3170 return err;
3171 }
3172
3173 strcpy(card->driver, "USB-Audio");
3174 sprintf(component, "USB%04x:%04x",
3175 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
3176 snd_component_add(card, component);
3177
3178 /* retrieve the device string as shortname */
3179 if (quirk && quirk->product_name) {
3180 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3181 } else {
3182 if (!dev->descriptor.iProduct ||
3183 usb_string(dev, dev->descriptor.iProduct,
3184 card->shortname, sizeof(card->shortname)) <= 0) {
3185 /* no name available from anywhere, so use ID */
3186 sprintf(card->shortname, "USB Device %#04x:%#04x",
3187 USB_ID_VENDOR(chip->usb_id),
3188 USB_ID_PRODUCT(chip->usb_id));
3189 }
3190 }
3191
3192 /* retrieve the vendor and device strings as longname */
3193 if (quirk && quirk->vendor_name) {
3194 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3195 } else {
3196 if (dev->descriptor.iManufacturer)
3197 len = usb_string(dev, dev->descriptor.iManufacturer,
3198 card->longname, sizeof(card->longname));
3199 else
3200 len = 0;
3201 /* we don't really care if there isn't any vendor string */
3202 }
3203 if (len > 0)
3204 strlcat(card->longname, " ", sizeof(card->longname));
3205
3206 strlcat(card->longname, card->shortname, sizeof(card->longname));
3207
3208 len = strlcat(card->longname, " at ", sizeof(card->longname));
3209
3210 if (len < sizeof(card->longname))
3211 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3212
3213 strlcat(card->longname,
3214 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3215 sizeof(card->longname));
3216
3217 snd_usb_audio_create_proc(chip);
3218
3219 *rchip = chip;
3220 return 0;
3221 }
3222
3223
3224 /*
3225 * probe the active usb device
3226 *
3227 * note that this can be called multiple times per a device, when it
3228 * includes multiple audio control interfaces.
3229 *
3230 * thus we check the usb device pointer and creates the card instance
3231 * only at the first time. the successive calls of this function will
3232 * append the pcm interface to the corresponding card.
3233 */
3234 static void *snd_usb_audio_probe(struct usb_device *dev,
3235 struct usb_interface *intf,
3236 const struct usb_device_id *usb_id)
3237 {
3238 const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info;
3239 int i, err;
3240 snd_usb_audio_t *chip;
3241 struct usb_host_interface *alts;
3242 int ifnum;
3243 u32 id;
3244
3245 alts = &intf->altsetting[0];
3246 ifnum = get_iface_desc(alts)->bInterfaceNumber;
3247 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3248 le16_to_cpu(dev->descriptor.idProduct));
3249
3250 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3251 goto __err_val;
3252
3253 /* SB Extigy needs special boot-up sequence */
3254 /* if more models come, this will go to the quirk list. */
3255 if (id == USB_ID(0x041e, 0x3000)) {
3256 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3257 goto __err_val;
3258 }
3259 /* SB Audigy 2 NX needs its own boot-up magic, too */
3260 if (id == USB_ID(0x041e, 0x3020)) {
3261 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3262 goto __err_val;
3263 }
3264
3265 /*
3266 * found a config. now register to ALSA
3267 */
3268
3269 /* check whether it's already registered */
3270 chip = NULL;
3271 down(&register_mutex);
3272 for (i = 0; i < SNDRV_CARDS; i++) {
3273 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3274 if (usb_chip[i]->shutdown) {
3275 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3276 goto __error;
3277 }
3278 chip = usb_chip[i];
3279 break;
3280 }
3281 }
3282 if (! chip) {
3283 /* it's a fresh one.
3284 * now look for an empty slot and create a new card instance
3285 */
3286 for (i = 0; i < SNDRV_CARDS; i++)
3287 if (enable[i] && ! usb_chip[i] &&
3288 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3289 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
3290 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3291 goto __error;
3292 }
3293 snd_card_set_dev(chip->card, &intf->dev);
3294 break;
3295 }
3296 if (! chip) {
3297 snd_printk(KERN_ERR "no available usb audio device\n");
3298 goto __error;
3299 }
3300 }
3301
3302 err = 1; /* continue */
3303 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3304 /* need some special handlings */
3305 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3306 goto __error;
3307 }
3308
3309 if (err > 0) {
3310 /* create normal USB audio interfaces */
3311 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3312 snd_usb_create_mixer(chip, ifnum) < 0) {
3313 goto __error;
3314 }
3315 }
3316
3317 /* we are allowed to call snd_card_register() many times */
3318 if (snd_card_register(chip->card) < 0) {
3319 goto __error;
3320 }
3321
3322 usb_chip[chip->index] = chip;
3323 chip->num_interfaces++;
3324 up(&register_mutex);
3325 return chip;
3326
3327 __error:
3328 if (chip && !chip->num_interfaces)
3329 snd_card_free(chip->card);
3330 up(&register_mutex);
3331 __err_val:
3332 return NULL;
3333 }
3334
3335 /*
3336 * we need to take care of counter, since disconnection can be called also
3337 * many times as well as usb_audio_probe().
3338 */
3339 static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3340 {
3341 snd_usb_audio_t *chip;
3342 snd_card_t *card;
3343 struct list_head *p;
3344
3345 if (ptr == (void *)-1L)
3346 return;
3347
3348 chip = ptr;
3349 card = chip->card;
3350 down(&register_mutex);
3351 chip->shutdown = 1;
3352 chip->num_interfaces--;
3353 if (chip->num_interfaces <= 0) {
3354 snd_card_disconnect(card);
3355 /* release the pcm resources */
3356 list_for_each(p, &chip->pcm_list) {
3357 snd_usb_stream_disconnect(p);
3358 }
3359 /* release the midi resources */
3360 list_for_each(p, &chip->midi_list) {
3361 snd_usbmidi_disconnect(p);
3362 }
3363 /* release mixer resources */
3364 list_for_each(p, &chip->mixer_list) {
3365 snd_usb_mixer_disconnect(p);
3366 }
3367 usb_chip[chip->index] = NULL;
3368 up(&register_mutex);
3369 snd_card_free(card);
3370 } else {
3371 up(&register_mutex);
3372 }
3373 }
3374
3375 /*
3376 * new 2.5 USB kernel API
3377 */
3378 static int usb_audio_probe(struct usb_interface *intf,
3379 const struct usb_device_id *id)
3380 {
3381 void *chip;
3382 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3383 if (chip) {
3384 dev_set_drvdata(&intf->dev, chip);
3385 return 0;
3386 } else
3387 return -EIO;
3388 }
3389
3390 static void usb_audio_disconnect(struct usb_interface *intf)
3391 {
3392 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3393 dev_get_drvdata(&intf->dev));
3394 }
3395
3396
3397 static int __init snd_usb_audio_init(void)
3398 {
3399 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3400 printk(KERN_WARNING "invalid nrpacks value.\n");
3401 return -EINVAL;
3402 }
3403 usb_register(&usb_audio_driver);
3404 return 0;
3405 }
3406
3407
3408 static void __exit snd_usb_audio_cleanup(void)
3409 {
3410 usb_deregister(&usb_audio_driver);
3411 }
3412
3413 module_init(snd_usb_audio_init);
3414 module_exit(snd_usb_audio_cleanup);
kernel source for telekom puls (alcatel/mediatek)