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[ALSA] Fix schedule_timeout usage
[deliverable/linux.git] / sound / usb / usbaudio.c
CommitLineData
1da177e4
LT		 1/*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Main and PCM part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 *
28 * NOTES:
29 *
30 * - async unlink should be used for avoiding the sleep inside lock.
31 * 2.4.22 usb-uhci seems buggy for async unlinking and results in
32 * oops. in such a cse, pass async_unlink=0 option.
33 * - the linked URBs would be preferred but not used so far because of
34 * the instability of unlinking.
35 * - type II is not supported properly. there is no device which supports
36 * this type *correctly*. SB extigy looks as if it supports, but it's
37 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
38 */
39
40
41#include <sound/driver.h>
42#include <linux/bitops.h>
43#include <linux/init.h>
7efd8bc8 44#include <linux/interrupt.h>
1da177e4
LT		 45#include <linux/list.h>
46#include <linux/slab.h>
47#include <linux/string.h>
48#include <linux/usb.h>
6207e51b 49#include <linux/vmalloc.h>
1da177e4
LT		 50#include <linux/moduleparam.h>
51#include <sound/core.h>
52#include <sound/info.h>
53#include <sound/pcm.h>
54#include <sound/pcm_params.h>
55#include <sound/initval.h>
56
57#include "usbaudio.h"
58
59
60MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
61MODULE_DESCRIPTION("USB Audio");
62MODULE_LICENSE("GPL");
63MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
64
65
66static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
67static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
68static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
69static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
70static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
71static int nrpacks = 4; /* max. number of packets per urb */
72static int async_unlink = 1;
73
74module_param_array(index, int, NULL, 0444);
75MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
76module_param_array(id, charp, NULL, 0444);
77MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
78module_param_array(enable, bool, NULL, 0444);
79MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
80module_param_array(vid, int, NULL, 0444);
81MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
82module_param_array(pid, int, NULL, 0444);
83MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
71d848ca 84module_param(nrpacks, int, 0644);
1da177e4
LT		 85MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
86module_param(async_unlink, bool, 0444);
87MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
88
89
90/*
91 * debug the h/w constraints
92 */
93/* #define HW_CONST_DEBUG */
94
95
96/*
97 *
98 */
99
100#define MAX_PACKS 10
101#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
15a24c07 102#define MAX_URBS 8
604cf499 103#define SYNC_URBS 4 /* always four urbs for sync */
1da177e4
LT		 104#define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
105
106typedef struct snd_usb_substream snd_usb_substream_t;
107typedef struct snd_usb_stream snd_usb_stream_t;
108typedef struct snd_urb_ctx snd_urb_ctx_t;
109
110struct audioformat {
111 struct list_head list;
112 snd_pcm_format_t format; /* format type */
113 unsigned int channels; /* # channels */
114 unsigned int fmt_type; /* USB audio format type (1-3) */
115 unsigned int frame_size; /* samples per frame for non-audio */
116 int iface; /* interface number */
117 unsigned char altsetting; /* corresponding alternate setting */
118 unsigned char altset_idx; /* array index of altenate setting */
119 unsigned char attributes; /* corresponding attributes of cs endpoint */
120 unsigned char endpoint; /* endpoint */
121 unsigned char ep_attr; /* endpoint attributes */
122 unsigned int maxpacksize; /* max. packet size */
123 unsigned int rates; /* rate bitmasks */
124 unsigned int rate_min, rate_max; /* min/max rates */
125 unsigned int nr_rates; /* number of rate table entries */
126 unsigned int *rate_table; /* rate table */
127};
128
129struct snd_urb_ctx {
130 struct urb *urb;
55851f73 131 unsigned int buffer_size; /* size of data buffer, if data URB */
1da177e4
LT		 132 snd_usb_substream_t *subs;
133 int index; /* index for urb array */
134 int packets; /* number of packets per urb */
1da177e4
LT		 135};
136
137struct snd_urb_ops {
138 int (*prepare)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
139 int (*retire)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
140 int (*prepare_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
141 int (*retire_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
142};
143
144struct snd_usb_substream {
145 snd_usb_stream_t *stream;
146 struct usb_device *dev;
147 snd_pcm_substream_t *pcm_substream;
148 int direction; /* playback or capture */
149 int interface; /* current interface */
150 int endpoint; /* assigned endpoint */
151 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
152 unsigned int cur_rate; /* current rate (for hw_params callback) */
153 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
154 unsigned int format; /* USB data format */
155 unsigned int datapipe; /* the data i/o pipe */
156 unsigned int syncpipe; /* 1 - async out or adaptive in */
573567e0 157 unsigned int datainterval; /* log_2 of data packet interval */
1da177e4
LT		 158 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
159 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
160 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
161 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
162 unsigned int phase; /* phase accumulator */
163 unsigned int maxpacksize; /* max packet size in bytes */
164 unsigned int maxframesize; /* max packet size in frames */
165 unsigned int curpacksize; /* current packet size in bytes (for capture) */
166 unsigned int curframesize; /* current packet size in frames (for capture) */
167 unsigned int fill_max: 1; /* fill max packet size always */
168 unsigned int fmt_type; /* USB audio format type (1-3) */
9624ea81 169 unsigned int packs_per_ms; /* packets per millisecond (for playback) */
1da177e4
LT		 170
171 unsigned int running: 1; /* running status */
172
1da177e4 173 unsigned int hwptr_done; /* processed frame position in the buffer */
1da177e4
LT		 174 unsigned int transfer_done; /* processed frames since last period update */
175 unsigned long active_mask; /* bitmask of active urbs */
176 unsigned long unlink_mask; /* bitmask of unlinked urbs */
177
178 unsigned int nurbs; /* # urbs */
179 snd_urb_ctx_t dataurb[MAX_URBS]; /* data urb table */
180 snd_urb_ctx_t syncurb[SYNC_URBS]; /* sync urb table */
55851f73
CL		 181 char *syncbuf; /* sync buffer for all sync URBs */
182 dma_addr_t sync_dma; /* DMA address of syncbuf */
1da177e4
LT		 183
184 u64 formats; /* format bitmasks (all or'ed) */
185 unsigned int num_formats; /* number of supported audio formats (list) */
186 struct list_head fmt_list; /* format list */
187 spinlock_t lock;
7efd8bc8 188 struct tasklet_struct start_period_elapsed; /* for start trigger */
1da177e4
LT		 189
190 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
191};
192
193
194struct snd_usb_stream {
195 snd_usb_audio_t *chip;
196 snd_pcm_t *pcm;
197 int pcm_index;
198 unsigned int fmt_type; /* USB audio format type (1-3) */
199 snd_usb_substream_t substream[2];
200 struct list_head list;
201};
202
203
204/*
205 * we keep the snd_usb_audio_t instances by ourselves for merging
206 * the all interfaces on the same card as one sound device.
207 */
208
209static DECLARE_MUTEX(register_mutex);
210static snd_usb_audio_t *usb_chip[SNDRV_CARDS];
211
212
213/*
214 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
215 * this will overflow at approx 524 kHz
216 */
77933d72 217static inline unsigned get_usb_full_speed_rate(unsigned int rate)
1da177e4
LT		 218{
219 return ((rate << 13) + 62) / 125;
220}
221
222/*
223 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
224 * this will overflow at approx 4 MHz
225 */
77933d72 226static inline unsigned get_usb_high_speed_rate(unsigned int rate)
1da177e4
LT		 227{
228 return ((rate << 10) + 62) / 125;
229}
230
231/* convert our full speed USB rate into sampling rate in Hz */
77933d72 232static inline unsigned get_full_speed_hz(unsigned int usb_rate)
1da177e4
LT		 233{
234 return (usb_rate * 125 + (1 << 12)) >> 13;
235}
236
237/* convert our high speed USB rate into sampling rate in Hz */
77933d72 238static inline unsigned get_high_speed_hz(unsigned int usb_rate)
1da177e4
LT		 239{
240 return (usb_rate * 125 + (1 << 9)) >> 10;
241}
242
243
244/*
245 * prepare urb for full speed capture sync pipe
246 *
247 * fill the length and offset of each urb descriptor.
248 * the fixed 10.14 frequency is passed through the pipe.
249 */
250static int prepare_capture_sync_urb(snd_usb_substream_t *subs,
251 snd_pcm_runtime_t *runtime,
252 struct urb *urb)
253{
254 unsigned char *cp = urb->transfer_buffer;
255 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
1da177e4 256
1da177e4 257 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 258 urb->iso_frame_desc[0].length = 3;
259 urb->iso_frame_desc[0].offset = 0;
260 cp[0] = subs->freqn >> 2;
261 cp[1] = subs->freqn >> 10;
262 cp[2] = subs->freqn >> 18;
1da177e4
LT		 263 return 0;
264}
265
266/*
267 * prepare urb for high speed capture sync pipe
268 *
269 * fill the length and offset of each urb descriptor.
270 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
271 */
272static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs,
273 snd_pcm_runtime_t *runtime,
274 struct urb *urb)
275{
276 unsigned char *cp = urb->transfer_buffer;
277 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
1da177e4 278
1da177e4 279 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 280 urb->iso_frame_desc[0].length = 4;
281 urb->iso_frame_desc[0].offset = 0;
282 cp[0] = subs->freqn;
283 cp[1] = subs->freqn >> 8;
284 cp[2] = subs->freqn >> 16;
285 cp[3] = subs->freqn >> 24;
1da177e4
LT		 286 return 0;
287}
288
289/*
290 * process after capture sync complete
291 * - nothing to do
292 */
293static int retire_capture_sync_urb(snd_usb_substream_t *subs,
294 snd_pcm_runtime_t *runtime,
295 struct urb *urb)
296{
297 return 0;
298}
299
300/*
301 * prepare urb for capture data pipe
302 *
303 * fill the offset and length of each descriptor.
304 *
305 * we use a temporary buffer to write the captured data.
306 * since the length of written data is determined by host, we cannot
307 * write onto the pcm buffer directly... the data is thus copied
308 * later at complete callback to the global buffer.
309 */
310static int prepare_capture_urb(snd_usb_substream_t *subs,
311 snd_pcm_runtime_t *runtime,
312 struct urb *urb)
313{
314 int i, offs;
1da177e4
LT		 315 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
316
317 offs = 0;
318 urb->dev = ctx->subs->dev; /* we need to set this at each time */
1da177e4
LT		 319 for (i = 0; i < ctx->packets; i++) {
320 urb->iso_frame_desc[i].offset = offs;
321 urb->iso_frame_desc[i].length = subs->curpacksize;
322 offs += subs->curpacksize;
1da177e4 323 }
1da177e4 324 urb->transfer_buffer_length = offs;
b263a9bd 325 urb->number_of_packets = ctx->packets;
1da177e4
LT		 326#if 0 // for check
327 if (! urb->bandwidth) {
328 int bustime;
329 bustime = usb_check_bandwidth(urb->dev, urb);
330 if (bustime < 0)
331 return bustime;
332 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
333 usb_claim_bandwidth(urb->dev, urb, bustime, 1);
334 }
335#endif // for check
336 return 0;
337}
338
339/*
340 * process after capture complete
341 *
342 * copy the data from each desctiptor to the pcm buffer, and
343 * update the current position.
344 */
345static int retire_capture_urb(snd_usb_substream_t *subs,
346 snd_pcm_runtime_t *runtime,
347 struct urb *urb)
348{
349 unsigned long flags;
350 unsigned char *cp;
351 int i;
352 unsigned int stride, len, oldptr;
b263a9bd 353 int period_elapsed = 0;
1da177e4
LT		 354
355 stride = runtime->frame_bits >> 3;
356
357 for (i = 0; i < urb->number_of_packets; i++) {
358 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
359 if (urb->iso_frame_desc[i].status) {
360 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
361 // continue;
362 }
363 len = urb->iso_frame_desc[i].actual_length / stride;
364 if (! len)
365 continue;
366 /* update the current pointer */
367 spin_lock_irqsave(&subs->lock, flags);
368 oldptr = subs->hwptr_done;
369 subs->hwptr_done += len;
370 if (subs->hwptr_done >= runtime->buffer_size)
371 subs->hwptr_done -= runtime->buffer_size;
372 subs->transfer_done += len;
b263a9bd
CL		 373 if (subs->transfer_done >= runtime->period_size) {
374 subs->transfer_done -= runtime->period_size;
375 period_elapsed = 1;
376 }
1da177e4
LT		 377 spin_unlock_irqrestore(&subs->lock, flags);
378 /* copy a data chunk */
379 if (oldptr + len > runtime->buffer_size) {
380 unsigned int cnt = runtime->buffer_size - oldptr;
381 unsigned int blen = cnt * stride;
382 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
383 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
384 } else {
385 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
386 }
1da177e4 387 }
b263a9bd
CL		 388 if (period_elapsed)
389 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 390 return 0;
391}
392
393
394/*
395 * prepare urb for full speed playback sync pipe
396 *
397 * set up the offset and length to receive the current frequency.
398 */
399
400static int prepare_playback_sync_urb(snd_usb_substream_t *subs,
401 snd_pcm_runtime_t *runtime,
402 struct urb *urb)
403{
1da177e4
LT		 404 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
405
1da177e4 406 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 407 urb->iso_frame_desc[0].length = 3;
408 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 409 return 0;
410}
411
412/*
413 * prepare urb for high speed playback sync pipe
414 *
415 * set up the offset and length to receive the current frequency.
416 */
417
418static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs,
419 snd_pcm_runtime_t *runtime,
420 struct urb *urb)
421{
1da177e4
LT		 422 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
423
1da177e4 424 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 425 urb->iso_frame_desc[0].length = 4;
426 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 427 return 0;
428}
429
430/*
431 * process after full speed playback sync complete
432 *
433 * retrieve the current 10.14 frequency from pipe, and set it.
434 * the value is referred in prepare_playback_urb().
435 */
436static int retire_playback_sync_urb(snd_usb_substream_t *subs,
437 snd_pcm_runtime_t *runtime,
438 struct urb *urb)
439{
ca81090a 440 unsigned int f;
1da177e4
LT		 441 unsigned long flags;
442
ca81090a
CL		 443 if (urb->iso_frame_desc[0].status == 0 &&
444 urb->iso_frame_desc[0].actual_length == 3) {
445 f = combine_triple((u8*)urb->transfer_buffer) << 2;
50cdbf15
CL		 446 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
447 spin_lock_irqsave(&subs->lock, flags);
448 subs->freqm = f;
449 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4 450 }
1da177e4
LT		 451 }
452
453 return 0;
454}
455
456/*
457 * process after high speed playback sync complete
458 *
459 * retrieve the current 12.13 frequency from pipe, and set it.
460 * the value is referred in prepare_playback_urb().
461 */
462static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs,
463 snd_pcm_runtime_t *runtime,
464 struct urb *urb)
465{
ca81090a 466 unsigned int f;
1da177e4
LT		 467 unsigned long flags;
468
ca81090a
CL		 469 if (urb->iso_frame_desc[0].status == 0 &&
470 urb->iso_frame_desc[0].actual_length == 4) {
471 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
50cdbf15
CL		 472 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
473 spin_lock_irqsave(&subs->lock, flags);
474 subs->freqm = f;
475 spin_unlock_irqrestore(&subs->lock, flags);
476 }
1da177e4
LT		 477 }
478
479 return 0;
480}
481
482/*
483 * prepare urb for playback data pipe
484 *
7efd8bc8
CL		 485 * Since a URB can handle only a single linear buffer, we must use double
486 * buffering when the data to be transferred overflows the buffer boundary.
487 * To avoid inconsistencies when updating hwptr_done, we use double buffering
488 * for all URBs.
1da177e4
LT		 489 */
490static int prepare_playback_urb(snd_usb_substream_t *subs,
491 snd_pcm_runtime_t *runtime,
492 struct urb *urb)
493{
494 int i, stride, offs;
495 unsigned int counts;
496 unsigned long flags;
7efd8bc8 497 int period_elapsed = 0;
1da177e4
LT		 498 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
499
500 stride = runtime->frame_bits >> 3;
501
502 offs = 0;
503 urb->dev = ctx->subs->dev; /* we need to set this at each time */
504 urb->number_of_packets = 0;
505 spin_lock_irqsave(&subs->lock, flags);
506 for (i = 0; i < ctx->packets; i++) {
507 /* calculate the size of a packet */
508 if (subs->fill_max)
509 counts = subs->maxframesize; /* fixed */
510 else {
573567e0
CL		 511 subs->phase = (subs->phase & 0xffff)
512 + (subs->freqm << subs->datainterval);
1da177e4
LT		 513 counts = subs->phase >> 16;
514 if (counts > subs->maxframesize)
515 counts = subs->maxframesize;
516 }
517 /* set up descriptor */
518 urb->iso_frame_desc[i].offset = offs * stride;
519 urb->iso_frame_desc[i].length = counts * stride;
520 offs += counts;
521 urb->number_of_packets++;
7efd8bc8
CL		 522 subs->transfer_done += counts;
523 if (subs->transfer_done >= runtime->period_size) {
524 subs->transfer_done -= runtime->period_size;
525 period_elapsed = 1;
1da177e4 526 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
7efd8bc8
CL		 527 if (subs->transfer_done > 0) {
528 /* FIXME: fill-max mode is not
529 * supported yet */
530 offs -= subs->transfer_done;
531 counts -= subs->transfer_done;
532 urb->iso_frame_desc[i].length =
533 counts * stride;
534 subs->transfer_done = 0;
1da177e4
LT		 535 }
536 i++;
537 if (i < ctx->packets) {
538 /* add a transfer delimiter */
7efd8bc8
CL		 539 urb->iso_frame_desc[i].offset =
540 offs * stride;
1da177e4
LT		 541 urb->iso_frame_desc[i].length = 0;
542 urb->number_of_packets++;
543 }
9624ea81 544 break;
1da177e4 545 }
1da177e4 546 }
9624ea81
CL		 547 /* finish at the frame boundary at/after the period boundary */
548 if (period_elapsed &&
549 (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
550 break;
1da177e4 551 }
7efd8bc8
CL		 552 if (subs->hwptr_done + offs > runtime->buffer_size) {
553 /* err, the transferred area goes over buffer boundary. */
554 unsigned int len = runtime->buffer_size - subs->hwptr_done;
555 memcpy(urb->transfer_buffer,
556 runtime->dma_area + subs->hwptr_done * stride,
557 len * stride);
558 memcpy(urb->transfer_buffer + len * stride,
559 runtime->dma_area,
560 (offs - len) * stride);
1da177e4 561 } else {
7efd8bc8
CL		 562 memcpy(urb->transfer_buffer,
563 runtime->dma_area + subs->hwptr_done * stride,
564 offs * stride);
1da177e4 565 }
7efd8bc8
CL		 566 subs->hwptr_done += offs;
567 if (subs->hwptr_done >= runtime->buffer_size)
568 subs->hwptr_done -= runtime->buffer_size;
1da177e4
LT		 569 spin_unlock_irqrestore(&subs->lock, flags);
570 urb->transfer_buffer_length = offs * stride;
7efd8bc8
CL		 571 if (period_elapsed) {
572 if (likely(subs->running))
573 snd_pcm_period_elapsed(subs->pcm_substream);
574 else
575 tasklet_hi_schedule(&subs->start_period_elapsed);
576 }
1da177e4
LT		 577 return 0;
578}
579
580/*
581 * process after playback data complete
7efd8bc8 582 * - nothing to do
1da177e4
LT		 583 */
584static int retire_playback_urb(snd_usb_substream_t *subs,
585 snd_pcm_runtime_t *runtime,
586 struct urb *urb)
587{
1da177e4
LT		 588 return 0;
589}
590
7efd8bc8
CL		 591/*
592 * Delay the snd_pcm_period_elapsed() call until after the start trigger
593 * callback so that we're not longer in the substream's lock.
594 */
595static void start_period_elapsed(unsigned long data)
596{
597 snd_usb_substream_t *subs = (snd_usb_substream_t *)data;
598 snd_pcm_period_elapsed(subs->pcm_substream);
599}
600
1da177e4
LT		 601
602/*
603 */
604static struct snd_urb_ops audio_urb_ops[2] = {
605 {
606 .prepare = prepare_playback_urb,
607 .retire = retire_playback_urb,
608 .prepare_sync = prepare_playback_sync_urb,
609 .retire_sync = retire_playback_sync_urb,
610 },
611 {
612 .prepare = prepare_capture_urb,
613 .retire = retire_capture_urb,
614 .prepare_sync = prepare_capture_sync_urb,
615 .retire_sync = retire_capture_sync_urb,
616 },
617};
618
619static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
620 {
621 .prepare = prepare_playback_urb,
622 .retire = retire_playback_urb,
623 .prepare_sync = prepare_playback_sync_urb_hs,
624 .retire_sync = retire_playback_sync_urb_hs,
625 },
626 {
627 .prepare = prepare_capture_urb,
628 .retire = retire_capture_urb,
629 .prepare_sync = prepare_capture_sync_urb_hs,
630 .retire_sync = retire_capture_sync_urb,
631 },
632};
633
634/*
635 * complete callback from data urb
636 */
637static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
638{
639 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
640 snd_usb_substream_t *subs = ctx->subs;
641 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
642 int err = 0;
643
644 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
645 ! subs->running || /* can be stopped during retire callback */
646 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
647 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
648 clear_bit(ctx->index, &subs->active_mask);
649 if (err < 0) {
650 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
651 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
652 }
653 }
654}
655
656
657/*
658 * complete callback from sync urb
659 */
660static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
661{
662 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
663 snd_usb_substream_t *subs = ctx->subs;
664 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
665 int err = 0;
666
667 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
668 ! subs->running || /* can be stopped during retire callback */
669 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
670 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
671 clear_bit(ctx->index + 16, &subs->active_mask);
672 if (err < 0) {
673 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
674 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
675 }
676 }
677}
678
679
6207e51b
CL		 680/* get the physical page pointer at the given offset */
681static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs,
682 unsigned long offset)
683{
684 void *pageptr = subs->runtime->dma_area + offset;
685 return vmalloc_to_page(pageptr);
686}
687
688/* allocate virtual buffer; may be called more than once */
689static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size)
690{
691 snd_pcm_runtime_t *runtime = subs->runtime;
692 if (runtime->dma_area) {
693 if (runtime->dma_bytes >= size)
694 return 0; /* already large enough */
b1d5776d 695 vfree(runtime->dma_area);
6207e51b 696 }
b1d5776d 697 runtime->dma_area = vmalloc(size);
6207e51b
CL		 698 if (! runtime->dma_area)
699 return -ENOMEM;
700 runtime->dma_bytes = size;
701 return 0;
702}
703
704/* free virtual buffer; may be called more than once */
705static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs)
706{
707 snd_pcm_runtime_t *runtime = subs->runtime;
708 if (runtime->dma_area) {
b1d5776d 709 vfree(runtime->dma_area);
6207e51b
CL		 710 runtime->dma_area = NULL;
711 }
712 return 0;
713}
714
715
1da177e4
LT		 716/*
717 * unlink active urbs.
718 */
719static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
720{
721 unsigned int i;
722 int async;
723
724 subs->running = 0;
725
726 if (!force && subs->stream->chip->shutdown) /* to be sure... */
727 return -EBADFD;
728
729 async = !can_sleep && async_unlink;
730
731 if (! async && in_interrupt())
732 return 0;
733
734 for (i = 0; i < subs->nurbs; i++) {
735 if (test_bit(i, &subs->active_mask)) {
736 if (! test_and_set_bit(i, &subs->unlink_mask)) {
737 struct urb *u = subs->dataurb[i].urb;
b375a049 738 if (async)
1da177e4 739 usb_unlink_urb(u);
b375a049 740 else
1da177e4
LT		 741 usb_kill_urb(u);
742 }
743 }
744 }
745 if (subs->syncpipe) {
746 for (i = 0; i < SYNC_URBS; i++) {
747 if (test_bit(i+16, &subs->active_mask)) {
748 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
749 struct urb *u = subs->syncurb[i].urb;
b375a049 750 if (async)
1da177e4 751 usb_unlink_urb(u);
b375a049 752 else
1da177e4
LT		 753 usb_kill_urb(u);
754 }
755 }
756 }
757 }
758 return 0;
759}
760
761
762/*
763 * set up and start data/sync urbs
764 */
765static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
766{
767 unsigned int i;
768 int err;
769
770 if (subs->stream->chip->shutdown)
771 return -EBADFD;
772
773 for (i = 0; i < subs->nurbs; i++) {
774 snd_assert(subs->dataurb[i].urb, return -EINVAL);
775 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
776 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
777 goto __error;
778 }
779 }
780 if (subs->syncpipe) {
781 for (i = 0; i < SYNC_URBS; i++) {
782 snd_assert(subs->syncurb[i].urb, return -EINVAL);
783 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
784 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
785 goto __error;
786 }
787 }
788 }
789
790 subs->active_mask = 0;
791 subs->unlink_mask = 0;
792 subs->running = 1;
793 for (i = 0; i < subs->nurbs; i++) {
794 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
795 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
796 goto __error;
797 }
798 set_bit(i, &subs->active_mask);
799 }
800 if (subs->syncpipe) {
801 for (i = 0; i < SYNC_URBS; i++) {
802 if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
803 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
804 goto __error;
805 }
806 set_bit(i + 16, &subs->active_mask);
807 }
808 }
809 return 0;
810
811 __error:
812 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
813 deactivate_urbs(subs, 0, 0);
814 return -EPIPE;
815}
816
817
818/*
819 * wait until all urbs are processed.
820 */
821static int wait_clear_urbs(snd_usb_substream_t *subs)
822{
b27c187f 823 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 824 unsigned int i;
825 int alive;
826
827 do {
828 alive = 0;
829 for (i = 0; i < subs->nurbs; i++) {
830 if (test_bit(i, &subs->active_mask))
831 alive++;
832 }
833 if (subs->syncpipe) {
834 for (i = 0; i < SYNC_URBS; i++) {
835 if (test_bit(i + 16, &subs->active_mask))
836 alive++;
837 }
838 }
839 if (! alive)
840 break;
8433a509 841 schedule_timeout_uninterruptible(1);
b27c187f 842 } while (time_before(jiffies, end_time));
1da177e4
LT		 843 if (alive)
844 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
845 return 0;
846}
847
848
849/*
850 * return the current pcm pointer. just return the hwptr_done value.
851 */
852static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
853{
daa150ef
CL		 854 snd_usb_substream_t *subs;
855 snd_pcm_uframes_t hwptr_done;
856
857 subs = (snd_usb_substream_t *)substream->runtime->private_data;
858 spin_lock(&subs->lock);
859 hwptr_done = subs->hwptr_done;
860 spin_unlock(&subs->lock);
861 return hwptr_done;
1da177e4
LT		 862}
863
864
865/*
866 * start/stop substream
867 */
868static int snd_usb_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
869{
870 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
871 int err;
872
873 switch (cmd) {
874 case SNDRV_PCM_TRIGGER_START:
875 err = start_urbs(subs, substream->runtime);
876 break;
877 case SNDRV_PCM_TRIGGER_STOP:
878 err = deactivate_urbs(subs, 0, 0);
879 break;
880 default:
881 err = -EINVAL;
882 break;
883 }
884 return err < 0 ? err : 0;
885}
886
887
888/*
889 * release a urb data
890 */
891static void release_urb_ctx(snd_urb_ctx_t *u)
892{
893 if (u->urb) {
55851f73
CL		 894 if (u->buffer_size)
895 usb_buffer_free(u->subs->dev, u->buffer_size,
896 u->urb->transfer_buffer,
897 u->urb->transfer_dma);
1da177e4
LT		 898 usb_free_urb(u->urb);
899 u->urb = NULL;
900 }
1da177e4
LT		 901}
902
903/*
904 * release a substream
905 */
906static void release_substream_urbs(snd_usb_substream_t *subs, int force)
907{
908 int i;
909
910 /* stop urbs (to be sure) */
911 deactivate_urbs(subs, force, 1);
912 wait_clear_urbs(subs);
913
914 for (i = 0; i < MAX_URBS; i++)
915 release_urb_ctx(&subs->dataurb[i]);
916 for (i = 0; i < SYNC_URBS; i++)
917 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 918 usb_buffer_free(subs->dev, SYNC_URBS * 4,
919 subs->syncbuf, subs->sync_dma);
920 subs->syncbuf = NULL;
1da177e4
LT		 921 subs->nurbs = 0;
922}
923
924/*
925 * initialize a substream for plaback/capture
926 */
927static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes,
928 unsigned int rate, unsigned int frame_bits)
929{
930 unsigned int maxsize, n, i;
931 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
a93bf990 932 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 933
934 /* calculate the frequency in 16.16 format */
935 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
936 subs->freqn = get_usb_full_speed_rate(rate);
937 else
938 subs->freqn = get_usb_high_speed_rate(rate);
939 subs->freqm = subs->freqn;
573567e0
CL		 940 /* calculate max. frequency */
941 if (subs->maxpacksize) {
942 /* whatever fits into a max. size packet */
1da177e4 943 maxsize = subs->maxpacksize;
573567e0
CL		 944 subs->freqmax = (maxsize / (frame_bits >> 3))
945 << (16 - subs->datainterval);
946 } else {
947 /* no max. packet size: just take 25% higher than nominal */
948 subs->freqmax = subs->freqn + (subs->freqn >> 2);
949 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
950 >> (16 - subs->datainterval);
1da177e4 951 }
573567e0 952 subs->phase = 0;
1da177e4
LT		 953
954 if (subs->fill_max)
955 subs->curpacksize = subs->maxpacksize;
956 else
957 subs->curpacksize = maxsize;
958
a93bf990
CL		 959 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
960 packs_per_ms = 8 >> subs->datainterval;
961 else
962 packs_per_ms = 1;
9624ea81 963 subs->packs_per_ms = packs_per_ms;
a93bf990 964
71d848ca 965 if (is_playback) {
1da177e4 966 urb_packs = nrpacks;
71d848ca
CL		 967 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
968 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
969 } else
15a24c07 970 urb_packs = 1;
a93bf990 971 urb_packs *= packs_per_ms;
1da177e4 972
1da177e4 973 /* decide how many packets to be used */
15a24c07 974 if (is_playback) {
d6db392e
CL		 975 unsigned int minsize;
976 /* determine how small a packet can be */
977 minsize = (subs->freqn >> (16 - subs->datainterval))
978 * (frame_bits >> 3);
7efd8bc8 979 /* with sync from device, assume it can be 12% lower */
d6db392e 980 if (subs->syncpipe)
7efd8bc8 981 minsize -= minsize >> 3;
d6db392e
CL		 982 minsize = max(minsize, 1u);
983 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990
CL		 984 /* round up to multiple of packs_per_ms */
985 total_packs = (total_packs + packs_per_ms - 1)
986 & ~(packs_per_ms - 1);
987 /* we need at least two URBs for queueing */
988 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
989 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
15a24c07
CL		 990 } else {
991 total_packs = MAX_URBS * urb_packs;
992 }
1da177e4
LT		 993 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
994 if (subs->nurbs > MAX_URBS) {
995 /* too much... */
996 subs->nurbs = MAX_URBS;
997 total_packs = MAX_URBS * urb_packs;
998 }
999 n = total_packs;
1000 for (i = 0; i < subs->nurbs; i++) {
1001 npacks[i] = n > urb_packs ? urb_packs : n;
1002 n -= urb_packs;
1003 }
1004 if (subs->nurbs <= 1) {
1005 /* too little - we need at least two packets
1006 * to ensure contiguous playback/capture
1007 */
1008 subs->nurbs = 2;
1009 npacks[0] = (total_packs + 1) / 2;
1010 npacks[1] = total_packs - npacks[0];
a93bf990 1011 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1da177e4
LT		 1012 /* the last packet is too small.. */
1013 if (subs->nurbs > 2) {
1014 /* merge to the first one */
1015 npacks[0] += npacks[subs->nurbs - 1];
1016 subs->nurbs--;
1017 } else {
1018 /* divide to two */
1019 subs->nurbs = 2;
1020 npacks[0] = (total_packs + 1) / 2;
1021 npacks[1] = total_packs - npacks[0];
1022 }
1023 }
1024
1025 /* allocate and initialize data urbs */
1026 for (i = 0; i < subs->nurbs; i++) {
1027 snd_urb_ctx_t *u = &subs->dataurb[i];
1028 u->index = i;
1029 u->subs = subs;
1da177e4 1030 u->packets = npacks[i];
55851f73 1031 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1032 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1033 u->packets++; /* for transfer delimiter */
1da177e4 1034 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
55851f73
CL		 1035 if (! u->urb)
1036 goto out_of_memory;
1037 u->urb->transfer_buffer =
1038 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1039 &u->urb->transfer_dma);
1040 if (! u->urb->transfer_buffer)
1041 goto out_of_memory;
1da177e4 1042 u->urb->pipe = subs->datapipe;
55851f73 1043 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1044 u->urb->interval = 1 << subs->datainterval;
1da177e4 1045 u->urb->context = u;
3527a008 1046 u->urb->complete = snd_complete_urb;
1da177e4
LT		 1047 }
1048
1049 if (subs->syncpipe) {
1050 /* allocate and initialize sync urbs */
55851f73
CL		 1051 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1052 GFP_KERNEL, &subs->sync_dma);
1053 if (! subs->syncbuf)
1054 goto out_of_memory;
1da177e4
LT		 1055 for (i = 0; i < SYNC_URBS; i++) {
1056 snd_urb_ctx_t *u = &subs->syncurb[i];
1057 u->index = i;
1058 u->subs = subs;
ca81090a
CL		 1059 u->packets = 1;
1060 u->urb = usb_alloc_urb(1, GFP_KERNEL);
55851f73
CL		 1061 if (! u->urb)
1062 goto out_of_memory;
ca81090a 1063 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1064 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1065 u->urb->transfer_buffer_length = 4;
1da177e4 1066 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1067 u->urb->transfer_flags = URB_ISO_ASAP |
1068 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1069 u->urb->number_of_packets = 1;
1149a64f 1070 u->urb->interval = 1 << subs->syncinterval;
1da177e4 1071 u->urb->context = u;
3527a008 1072 u->urb->complete = snd_complete_sync_urb;
1da177e4
LT		 1073 }
1074 }
1075 return 0;
55851f73
CL		 1076
1077out_of_memory:
1078 release_substream_urbs(subs, 0);
1079 return -ENOMEM;
1da177e4
LT		 1080}
1081
1082
1083/*
1084 * find a matching audio format
1085 */
1086static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format,
1087 unsigned int rate, unsigned int channels)
1088{
1089 struct list_head *p;
1090 struct audioformat *found = NULL;
1091 int cur_attr = 0, attr;
1092
1093 list_for_each(p, &subs->fmt_list) {
1094 struct audioformat *fp;
1095 fp = list_entry(p, struct audioformat, list);
1096 if (fp->format != format || fp->channels != channels)
1097 continue;
1098 if (rate < fp->rate_min || rate > fp->rate_max)
1099 continue;
1100 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1101 unsigned int i;
1102 for (i = 0; i < fp->nr_rates; i++)
1103 if (fp->rate_table[i] == rate)
1104 break;
1105 if (i >= fp->nr_rates)
1106 continue;
1107 }
1108 attr = fp->ep_attr & EP_ATTR_MASK;
1109 if (! found) {
1110 found = fp;
1111 cur_attr = attr;
1112 continue;
1113 }
1114 /* avoid async out and adaptive in if the other method
1115 * supports the same format.
1116 * this is a workaround for the case like
1117 * M-audio audiophile USB.
1118 */
1119 if (attr != cur_attr) {
1120 if ((attr == EP_ATTR_ASYNC &&
1121 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1122 (attr == EP_ATTR_ADAPTIVE &&
1123 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1124 continue;
1125 if ((cur_attr == EP_ATTR_ASYNC &&
1126 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1127 (cur_attr == EP_ATTR_ADAPTIVE &&
1128 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1129 found = fp;
1130 cur_attr = attr;
1131 continue;
1132 }
1133 }
1134 /* find the format with the largest max. packet size */
1135 if (fp->maxpacksize > found->maxpacksize) {
1136 found = fp;
1137 cur_attr = attr;
1138 }
1139 }
1140 return found;
1141}
1142
1143
1144/*
1145 * initialize the picth control and sample rate
1146 */
1147static int init_usb_pitch(struct usb_device *dev, int iface,
1148 struct usb_host_interface *alts,
1149 struct audioformat *fmt)
1150{
1151 unsigned int ep;
1152 unsigned char data[1];
1153 int err;
1154
1155 ep = get_endpoint(alts, 0)->bEndpointAddress;
1156 /* if endpoint has pitch control, enable it */
1157 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1158 data[0] = 1;
1159 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1160 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1161 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1162 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1163 dev->devnum, iface, ep);
1164 return err;
1165 }
1166 }
1167 return 0;
1168}
1169
1170static int init_usb_sample_rate(struct usb_device *dev, int iface,
1171 struct usb_host_interface *alts,
1172 struct audioformat *fmt, int rate)
1173{
1174 unsigned int ep;
1175 unsigned char data[3];
1176 int err;
1177
1178 ep = get_endpoint(alts, 0)->bEndpointAddress;
1179 /* if endpoint has sampling rate control, set it */
1180 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1181 int crate;
1182 data[0] = rate;
1183 data[1] = rate >> 8;
1184 data[2] = rate >> 16;
1185 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1186 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1187 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1188 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1189 dev->devnum, iface, fmt->altsetting, rate, ep);
1190 return err;
1191 }
1192 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1193 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1194 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1195 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1196 dev->devnum, iface, fmt->altsetting, ep);
1197 return 0; /* some devices don't support reading */
1198 }
1199 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1200 if (crate != rate) {
1201 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1202 // runtime->rate = crate;
1203 }
1204 }
1205 return 0;
1206}
1207
1208/*
1209 * find a matching format and set up the interface
1210 */
1211static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
1212{
1213 struct usb_device *dev = subs->dev;
1214 struct usb_host_interface *alts;
1215 struct usb_interface_descriptor *altsd;
1216 struct usb_interface *iface;
1217 unsigned int ep, attr;
1218 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1219 int err;
1220
1221 iface = usb_ifnum_to_if(dev, fmt->iface);
1222 snd_assert(iface, return -EINVAL);
1223 alts = &iface->altsetting[fmt->altset_idx];
1224 altsd = get_iface_desc(alts);
1225 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1226
1227 if (fmt == subs->cur_audiofmt)
1228 return 0;
1229
1230 /* close the old interface */
1231 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1232 usb_set_interface(subs->dev, subs->interface, 0);
1233 subs->interface = -1;
1234 subs->format = 0;
1235 }
1236
1237 /* set interface */
1238 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1239 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1240 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1241 dev->devnum, fmt->iface, fmt->altsetting);
1242 return -EIO;
1243 }
1244 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1245 subs->interface = fmt->iface;
1246 subs->format = fmt->altset_idx;
1247 }
1248
1249 /* create a data pipe */
1250 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1251 if (is_playback)
1252 subs->datapipe = usb_sndisocpipe(dev, ep);
1253 else
1254 subs->datapipe = usb_rcvisocpipe(dev, ep);
573567e0
CL		 1255 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1256 get_endpoint(alts, 0)->bInterval >= 1 &&
1257 get_endpoint(alts, 0)->bInterval <= 4)
1258 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1259 else
1260 subs->datainterval = 0;
1da177e4
LT		 1261 subs->syncpipe = subs->syncinterval = 0;
1262 subs->maxpacksize = fmt->maxpacksize;
1263 subs->fill_max = 0;
1264
1265 /* we need a sync pipe in async OUT or adaptive IN mode */
1266 /* check the number of EP, since some devices have broken
1267 * descriptors which fool us. if it has only one EP,
1268 * assume it as adaptive-out or sync-in.
1269 */
1270 attr = fmt->ep_attr & EP_ATTR_MASK;
1271 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1272 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1273 altsd->bNumEndpoints >= 2) {
1274 /* check sync-pipe endpoint */
1275 /* ... and check descriptor size before accessing bSynchAddress
1276 because there is a version of the SB Audigy 2 NX firmware lacking
1277 the audio fields in the endpoint descriptors */
1278 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1279 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1280 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1281 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1282 dev->devnum, fmt->iface, fmt->altsetting);
1283 return -EINVAL;
1284 }
1285 ep = get_endpoint(alts, 1)->bEndpointAddress;
1286 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1287 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1288 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1289 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1290 dev->devnum, fmt->iface, fmt->altsetting);
1291 return -EINVAL;
1292 }
1293 ep &= USB_ENDPOINT_NUMBER_MASK;
1294 if (is_playback)
1295 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1296 else
1297 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1298 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1299 get_endpoint(alts, 1)->bRefresh >= 1 &&
1300 get_endpoint(alts, 1)->bRefresh <= 9)
1301 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1302 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1303 subs->syncinterval = 1;
604cf499
CL		 1304 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1305 get_endpoint(alts, 1)->bInterval <= 16)
1306 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1307 else
1308 subs->syncinterval = 3;
1da177e4
LT		 1309 }
1310
1311 /* always fill max packet size */
1312 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1313 subs->fill_max = 1;
1314
1315 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1316 return err;
1317
1318 subs->cur_audiofmt = fmt;
1319
1320#if 0
1321 printk("setting done: format = %d, rate = %d, channels = %d\n",
1322 fmt->format, fmt->rate, fmt->channels);
1323 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1324 subs->datapipe, subs->syncpipe);
1325#endif
1326
1327 return 0;
1328}
1329
1330/*
1331 * hw_params callback
1332 *
1333 * allocate a buffer and set the given audio format.
1334 *
1335 * so far we use a physically linear buffer although packetize transfer
1336 * doesn't need a continuous area.
1337 * if sg buffer is supported on the later version of alsa, we'll follow
1338 * that.
1339 */
1340static int snd_usb_hw_params(snd_pcm_substream_t *substream,
1341 snd_pcm_hw_params_t *hw_params)
1342{
1343 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1344 struct audioformat *fmt;
1345 unsigned int channels, rate, format;
1346 int ret, changed;
1347
6207e51b
CL		 1348 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1349 params_buffer_bytes(hw_params));
1da177e4
LT		 1350 if (ret < 0)
1351 return ret;
1352
1353 format = params_format(hw_params);
1354 rate = params_rate(hw_params);
1355 channels = params_channels(hw_params);
1356 fmt = find_format(subs, format, rate, channels);
1357 if (! fmt) {
1358 snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
1359 snd_pcm_format_name(format), rate, channels);
1360 return -EINVAL;
1361 }
1362
1363 changed = subs->cur_audiofmt != fmt ||
1364 subs->period_bytes != params_period_bytes(hw_params) ||
1365 subs->cur_rate != rate;
1366 if ((ret = set_format(subs, fmt)) < 0)
1367 return ret;
1368
1369 if (subs->cur_rate != rate) {
1370 struct usb_host_interface *alts;
1371 struct usb_interface *iface;
1372 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1373 alts = &iface->altsetting[fmt->altset_idx];
1374 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1375 if (ret < 0)
1376 return ret;
1377 subs->cur_rate = rate;
1378 }
1379
1380 if (changed) {
1381 /* format changed */
1382 release_substream_urbs(subs, 0);
1383 /* influenced: period_bytes, channels, rate, format, */
1384 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1385 params_rate(hw_params),
1386 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1387 }
1388
1389 return ret;
1390}
1391
1392/*
1393 * hw_free callback
1394 *
1395 * reset the audio format and release the buffer
1396 */
1397static int snd_usb_hw_free(snd_pcm_substream_t *substream)
1398{
1399 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1400
1401 subs->cur_audiofmt = NULL;
1402 subs->cur_rate = 0;
1403 subs->period_bytes = 0;
1404 release_substream_urbs(subs, 0);
6207e51b 1405 return snd_pcm_free_vmalloc_buffer(substream);
1da177e4
LT		 1406}
1407
1408/*
1409 * prepare callback
1410 *
1411 * only a few subtle things...
1412 */
1413static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
1414{
1415 snd_pcm_runtime_t *runtime = substream->runtime;
1416 snd_usb_substream_t *subs = (snd_usb_substream_t *)runtime->private_data;
1417
1418 if (! subs->cur_audiofmt) {
1419 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1420 return -ENXIO;
1421 }
1422
1423 /* some unit conversions in runtime */
1424 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1425 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1426
1427 /* reset the pointer */
1da177e4 1428 subs->hwptr_done = 0;
1da177e4
LT		 1429 subs->transfer_done = 0;
1430 subs->phase = 0;
1431
1432 /* clear urbs (to be sure) */
1433 deactivate_urbs(subs, 0, 1);
1434 wait_clear_urbs(subs);
1435
1436 return 0;
1437}
1438
1439static snd_pcm_hardware_t snd_usb_playback =
1440{
49045d3d
CL		 1441 .info = SNDRV_PCM_INFO_MMAP |
1442 SNDRV_PCM_INFO_MMAP_VALID |
1443 SNDRV_PCM_INFO_BATCH |
1444 SNDRV_PCM_INFO_INTERLEAVED |
1445 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1446 .buffer_bytes_max = 1024 * 1024,
1da177e4 1447 .period_bytes_min = 64,
d31cbbfd 1448 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1449 .periods_min = 2,
1450 .periods_max = 1024,
1451};
1452
1453static snd_pcm_hardware_t snd_usb_capture =
1454{
49045d3d
CL		 1455 .info = SNDRV_PCM_INFO_MMAP |
1456 SNDRV_PCM_INFO_MMAP_VALID |
1457 SNDRV_PCM_INFO_BATCH |
1458 SNDRV_PCM_INFO_INTERLEAVED |
1459 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1460 .buffer_bytes_max = 1024 * 1024,
1da177e4 1461 .period_bytes_min = 64,
d31cbbfd 1462 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1463 .periods_min = 2,
1464 .periods_max = 1024,
1465};
1466
1467/*
1468 * h/w constraints
1469 */
1470
1471#ifdef HW_CONST_DEBUG
1472#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1473#else
1474#define hwc_debug(fmt, args...) /**/
1475#endif
1476
1477static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp)
1478{
1479 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1480 snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1481 snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1482
1483 /* check the format */
1484 if (! snd_mask_test(fmts, fp->format)) {
1485 hwc_debug(" > check: no supported format %d\n", fp->format);
1486 return 0;
1487 }
1488 /* check the channels */
1489 if (fp->channels < ct->min || fp->channels > ct->max) {
1490 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1491 return 0;
1492 }
1493 /* check the rate is within the range */
1494 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1495 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1496 return 0;
1497 }
1498 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1499 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1500 return 0;
1501 }
1502 return 1;
1503}
1504
1505static int hw_rule_rate(snd_pcm_hw_params_t *params,
1506 snd_pcm_hw_rule_t *rule)
1507{
1508 snd_usb_substream_t *subs = rule->private;
1509 struct list_head *p;
1510 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1511 unsigned int rmin, rmax;
1512 int changed;
1513
1514 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1515 changed = 0;
1516 rmin = rmax = 0;
1517 list_for_each(p, &subs->fmt_list) {
1518 struct audioformat *fp;
1519 fp = list_entry(p, struct audioformat, list);
1520 if (! hw_check_valid_format(params, fp))
1521 continue;
1522 if (changed++) {
1523 if (rmin > fp->rate_min)
1524 rmin = fp->rate_min;
1525 if (rmax < fp->rate_max)
1526 rmax = fp->rate_max;
1527 } else {
1528 rmin = fp->rate_min;
1529 rmax = fp->rate_max;
1530 }
1531 }
1532
1533 if (! changed) {
1534 hwc_debug(" --> get empty\n");
1535 it->empty = 1;
1536 return -EINVAL;
1537 }
1538
1539 changed = 0;
1540 if (it->min < rmin) {
1541 it->min = rmin;
1542 it->openmin = 0;
1543 changed = 1;
1544 }
1545 if (it->max > rmax) {
1546 it->max = rmax;
1547 it->openmax = 0;
1548 changed = 1;
1549 }
1550 if (snd_interval_checkempty(it)) {
1551 it->empty = 1;
1552 return -EINVAL;
1553 }
1554 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1555 return changed;
1556}
1557
1558
1559static int hw_rule_channels(snd_pcm_hw_params_t *params,
1560 snd_pcm_hw_rule_t *rule)
1561{
1562 snd_usb_substream_t *subs = rule->private;
1563 struct list_head *p;
1564 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1565 unsigned int rmin, rmax;
1566 int changed;
1567
1568 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1569 changed = 0;
1570 rmin = rmax = 0;
1571 list_for_each(p, &subs->fmt_list) {
1572 struct audioformat *fp;
1573 fp = list_entry(p, struct audioformat, list);
1574 if (! hw_check_valid_format(params, fp))
1575 continue;
1576 if (changed++) {
1577 if (rmin > fp->channels)
1578 rmin = fp->channels;
1579 if (rmax < fp->channels)
1580 rmax = fp->channels;
1581 } else {
1582 rmin = fp->channels;
1583 rmax = fp->channels;
1584 }
1585 }
1586
1587 if (! changed) {
1588 hwc_debug(" --> get empty\n");
1589 it->empty = 1;
1590 return -EINVAL;
1591 }
1592
1593 changed = 0;
1594 if (it->min < rmin) {
1595 it->min = rmin;
1596 it->openmin = 0;
1597 changed = 1;
1598 }
1599 if (it->max > rmax) {
1600 it->max = rmax;
1601 it->openmax = 0;
1602 changed = 1;
1603 }
1604 if (snd_interval_checkempty(it)) {
1605 it->empty = 1;
1606 return -EINVAL;
1607 }
1608 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1609 return changed;
1610}
1611
1612static int hw_rule_format(snd_pcm_hw_params_t *params,
1613 snd_pcm_hw_rule_t *rule)
1614{
1615 snd_usb_substream_t *subs = rule->private;
1616 struct list_head *p;
1617 snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1618 u64 fbits;
1619 u32 oldbits[2];
1620 int changed;
1621
1622 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1623 fbits = 0;
1624 list_for_each(p, &subs->fmt_list) {
1625 struct audioformat *fp;
1626 fp = list_entry(p, struct audioformat, list);
1627 if (! hw_check_valid_format(params, fp))
1628 continue;
1629 fbits |= (1ULL << fp->format);
1630 }
1631
1632 oldbits[0] = fmt->bits[0];
1633 oldbits[1] = fmt->bits[1];
1634 fmt->bits[0] &= (u32)fbits;
1635 fmt->bits[1] &= (u32)(fbits >> 32);
1636 if (! fmt->bits[0] && ! fmt->bits[1]) {
1637 hwc_debug(" --> get empty\n");
1638 return -EINVAL;
1639 }
1640 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1641 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1642 return changed;
1643}
1644
1645#define MAX_MASK 64
1646
1647/*
1648 * check whether the registered audio formats need special hw-constraints
1649 */
1650static int check_hw_params_convention(snd_usb_substream_t *subs)
1651{
1652 int i;
1653 u32 *channels;
1654 u32 *rates;
1655 u32 cmaster, rmaster;
1656 u32 rate_min = 0, rate_max = 0;
1657 struct list_head *p;
1658 int err = 1;
1659
1660 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1661 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1662
1663 list_for_each(p, &subs->fmt_list) {
1664 struct audioformat *f;
1665 f = list_entry(p, struct audioformat, list);
1666 /* unconventional channels? */
1667 if (f->channels > 32)
1668 goto __out;
1669 /* continuous rate min/max matches? */
1670 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1671 if (rate_min && f->rate_min != rate_min)
1672 goto __out;
1673 if (rate_max && f->rate_max != rate_max)
1674 goto __out;
1675 rate_min = f->rate_min;
1676 rate_max = f->rate_max;
1677 }
1678 /* combination of continuous rates and fixed rates? */
1679 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1680 if (f->rates != rates[f->format])
1681 goto __out;
1682 }
1683 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1684 if (rates[f->format] && rates[f->format] != f->rates)
1685 goto __out;
1686 }
1687 channels[f->format] |= (1 << f->channels);
1688 rates[f->format] |= f->rates;
1689 }
1690 /* check whether channels and rates match for all formats */
1691 cmaster = rmaster = 0;
1692 for (i = 0; i < MAX_MASK; i++) {
1693 if (cmaster != channels[i] && cmaster && channels[i])
1694 goto __out;
1695 if (rmaster != rates[i] && rmaster && rates[i])
1696 goto __out;
1697 if (channels[i])
1698 cmaster = channels[i];
1699 if (rates[i])
1700 rmaster = rates[i];
1701 }
1702 /* check whether channels match for all distinct rates */
1703 memset(channels, 0, MAX_MASK * sizeof(u32));
1704 list_for_each(p, &subs->fmt_list) {
1705 struct audioformat *f;
1706 f = list_entry(p, struct audioformat, list);
1707 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1708 continue;
1709 for (i = 0; i < 32; i++) {
1710 if (f->rates & (1 << i))
1711 channels[i] |= (1 << f->channels);
1712 }
1713 }
1714 cmaster = 0;
1715 for (i = 0; i < 32; i++) {
1716 if (cmaster != channels[i] && cmaster && channels[i])
1717 goto __out;
1718 if (channels[i])
1719 cmaster = channels[i];
1720 }
1721 err = 0;
1722
1723 __out:
1724 kfree(channels);
1725 kfree(rates);
1726 return err;
1727}
1728
1729
1730/*
1731 * set up the runtime hardware information.
1732 */
1733
1734static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
1735{
1736 struct list_head *p;
1737 int err;
1738
1739 runtime->hw.formats = subs->formats;
1740
1741 runtime->hw.rate_min = 0x7fffffff;
1742 runtime->hw.rate_max = 0;
1743 runtime->hw.channels_min = 256;
1744 runtime->hw.channels_max = 0;
1745 runtime->hw.rates = 0;
1746 /* check min/max rates and channels */
1747 list_for_each(p, &subs->fmt_list) {
1748 struct audioformat *fp;
1749 fp = list_entry(p, struct audioformat, list);
1750 runtime->hw.rates |= fp->rates;
1751 if (runtime->hw.rate_min > fp->rate_min)
1752 runtime->hw.rate_min = fp->rate_min;
1753 if (runtime->hw.rate_max < fp->rate_max)
1754 runtime->hw.rate_max = fp->rate_max;
1755 if (runtime->hw.channels_min > fp->channels)
1756 runtime->hw.channels_min = fp->channels;
1757 if (runtime->hw.channels_max < fp->channels)
1758 runtime->hw.channels_max = fp->channels;
1759 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1760 /* FIXME: there might be more than one audio formats... */
1761 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1762 fp->frame_size;
1763 }
1764 }
1765
1766 /* set the period time minimum 1ms */
1767 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1768 1000 * MIN_PACKS_URB,
1769 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1770
1771 if (check_hw_params_convention(subs)) {
1772 hwc_debug("setting extra hw constraints...\n");
1773 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1774 hw_rule_rate, subs,
1775 SNDRV_PCM_HW_PARAM_FORMAT,
1776 SNDRV_PCM_HW_PARAM_CHANNELS,
1777 -1)) < 0)
1778 return err;
1779 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1780 hw_rule_channels, subs,
1781 SNDRV_PCM_HW_PARAM_FORMAT,
1782 SNDRV_PCM_HW_PARAM_RATE,
1783 -1)) < 0)
1784 return err;
1785 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1786 hw_rule_format, subs,
1787 SNDRV_PCM_HW_PARAM_RATE,
1788 SNDRV_PCM_HW_PARAM_CHANNELS,
1789 -1)) < 0)
1790 return err;
1791 }
1792 return 0;
1793}
1794
1795static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
1796 snd_pcm_hardware_t *hw)
1797{
1798 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1799 snd_pcm_runtime_t *runtime = substream->runtime;
1800 snd_usb_substream_t *subs = &as->substream[direction];
1801
1802 subs->interface = -1;
1803 subs->format = 0;
1804 runtime->hw = *hw;
1805 runtime->private_data = subs;
1806 subs->pcm_substream = substream;
1807 return setup_hw_info(runtime, subs);
1808}
1809
1810static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
1811{
1812 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1813 snd_usb_substream_t *subs = &as->substream[direction];
1814
1815 if (subs->interface >= 0) {
1816 usb_set_interface(subs->dev, subs->interface, 0);
1817 subs->interface = -1;
1818 }
1819 subs->pcm_substream = NULL;
1820 return 0;
1821}
1822
1823static int snd_usb_playback_open(snd_pcm_substream_t *substream)
1824{
1825 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1826}
1827
1828static int snd_usb_playback_close(snd_pcm_substream_t *substream)
1829{
1830 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1831}
1832
1833static int snd_usb_capture_open(snd_pcm_substream_t *substream)
1834{
1835 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1836}
1837
1838static int snd_usb_capture_close(snd_pcm_substream_t *substream)
1839{
1840 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1841}
1842
1843static snd_pcm_ops_t snd_usb_playback_ops = {
1844 .open = snd_usb_playback_open,
1845 .close = snd_usb_playback_close,
1846 .ioctl = snd_pcm_lib_ioctl,
1847 .hw_params = snd_usb_hw_params,
1848 .hw_free = snd_usb_hw_free,
1849 .prepare = snd_usb_pcm_prepare,
1850 .trigger = snd_usb_pcm_trigger,
1851 .pointer = snd_usb_pcm_pointer,
6207e51b 1852 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1853};
1854
1855static snd_pcm_ops_t snd_usb_capture_ops = {
1856 .open = snd_usb_capture_open,
1857 .close = snd_usb_capture_close,
1858 .ioctl = snd_pcm_lib_ioctl,
1859 .hw_params = snd_usb_hw_params,
1860 .hw_free = snd_usb_hw_free,
1861 .prepare = snd_usb_pcm_prepare,
1862 .trigger = snd_usb_pcm_trigger,
1863 .pointer = snd_usb_pcm_pointer,
6207e51b 1864 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1865};
1866
1867
1868
1869/*
1870 * helper functions
1871 */
1872
1873/*
1874 * combine bytes and get an integer value
1875 */
1876unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1877{
1878 switch (size) {
1879 case 1: return *bytes;
1880 case 2: return combine_word(bytes);
1881 case 3: return combine_triple(bytes);
1882 case 4: return combine_quad(bytes);
1883 default: return 0;
1884 }
1885}
1886
1887/*
1888 * parse descriptor buffer and return the pointer starting the given
1889 * descriptor type.
1890 */
1891void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1892{
1893 u8 *p, *end, *next;
1894
1895 p = descstart;
1896 end = p + desclen;
1897 for (; p < end;) {
1898 if (p[0] < 2)
1899 return NULL;
1900 next = p + p[0];
1901 if (next > end)
1902 return NULL;
1903 if (p[1] == dtype && (!after || (void *)p > after)) {
1904 return p;
1905 }
1906 p = next;
1907 }
1908 return NULL;
1909}
1910
1911/*
1912 * find a class-specified interface descriptor with the given subtype.
1913 */
1914void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1915{
1916 unsigned char *p = after;
1917
1918 while ((p = snd_usb_find_desc(buffer, buflen, p,
1919 USB_DT_CS_INTERFACE)) != NULL) {
1920 if (p[0] >= 3 && p[2] == dsubtype)
1921 return p;
1922 }
1923 return NULL;
1924}
1925
1926/*
1927 * Wrapper for usb_control_msg().
1928 * Allocates a temp buffer to prevent dmaing from/to the stack.
1929 */
1930int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1931 __u8 requesttype, __u16 value, __u16 index, void *data,
1932 __u16 size, int timeout)
1933{
1934 int err;
1935 void *buf = NULL;
1936
1937 if (size > 0) {
1938 buf = kmalloc(size, GFP_KERNEL);
1939 if (!buf)
1940 return -ENOMEM;
1941 memcpy(buf, data, size);
1942 }
1943 err = usb_control_msg(dev, pipe, request, requesttype,
1944 value, index, buf, size, timeout);
1945 if (size > 0) {
1946 memcpy(data, buf, size);
1947 kfree(buf);
1948 }
1949 return err;
1950}
1951
1952
1953/*
1954 * entry point for linux usb interface
1955 */
1956
1957static int usb_audio_probe(struct usb_interface *intf,
1958 const struct usb_device_id *id);
1959static void usb_audio_disconnect(struct usb_interface *intf);
1960
1961static struct usb_device_id usb_audio_ids [] = {
1962#include "usbquirks.h"
1963 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1964 .bInterfaceClass = USB_CLASS_AUDIO,
1965 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
1966 { } /* Terminating entry */
1967};
1968
1969MODULE_DEVICE_TABLE (usb, usb_audio_ids);
1970
1971static struct usb_driver usb_audio_driver = {
1972 .owner = THIS_MODULE,
1973 .name = "snd-usb-audio",
1974 .probe = usb_audio_probe,
1975 .disconnect = usb_audio_disconnect,
1976 .id_table = usb_audio_ids,
1977};
1978
1979
1980/*
1981 * proc interface for list the supported pcm formats
1982 */
1983static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
1984{
1985 struct list_head *p;
1986 static char *sync_types[4] = {
1987 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
1988 };
1989
1990 list_for_each(p, &subs->fmt_list) {
1991 struct audioformat *fp;
1992 fp = list_entry(p, struct audioformat, list);
1993 snd_iprintf(buffer, " Interface %d\n", fp->iface);
1994 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
1995 snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
1996 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
1997 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
1998 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
1999 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2000 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2001 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2002 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2003 fp->rate_min, fp->rate_max);
2004 } else {
2005 unsigned int i;
2006 snd_iprintf(buffer, " Rates: ");
2007 for (i = 0; i < fp->nr_rates; i++) {
2008 if (i > 0)
2009 snd_iprintf(buffer, ", ");
2010 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2011 }
2012 snd_iprintf(buffer, "\n");
2013 }
2014 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2015 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2016 }
2017}
2018
2019static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
2020{
2021 if (subs->running) {
2022 unsigned int i;
2023 snd_iprintf(buffer, " Status: Running\n");
2024 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2025 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2026 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2027 for (i = 0; i < subs->nurbs; i++)
2028 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2029 snd_iprintf(buffer, "]\n");
2030 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2031 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2032 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2033 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2034 : get_high_speed_hz(subs->freqm),
2035 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2036 } else {
2037 snd_iprintf(buffer, " Status: Stop\n");
2038 }
2039}
2040
2041static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
2042{
2043 snd_usb_stream_t *stream = entry->private_data;
2044
2045 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2046
2047 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2048 snd_iprintf(buffer, "\nPlayback:\n");
2049 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2050 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2051 }
2052 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2053 snd_iprintf(buffer, "\nCapture:\n");
2054 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2055 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2056 }
2057}
2058
2059static void proc_pcm_format_add(snd_usb_stream_t *stream)
2060{
2061 snd_info_entry_t *entry;
2062 char name[32];
2063 snd_card_t *card = stream->chip->card;
2064
2065 sprintf(name, "stream%d", stream->pcm_index);
2066 if (! snd_card_proc_new(card, name, &entry))
2067 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2068}
2069
2070
2071/*
2072 * initialize the substream instance.
2073 */
2074
2075static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp)
2076{
2077 snd_usb_substream_t *subs = &as->substream[stream];
2078
2079 INIT_LIST_HEAD(&subs->fmt_list);
2080 spin_lock_init(&subs->lock);
7efd8bc8
CL		 2081 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2082 tasklet_init(&subs->start_period_elapsed, start_period_elapsed,
2083 (unsigned long)subs);
1da177e4
LT		 2084
2085 subs->stream = as;
2086 subs->direction = stream;
2087 subs->dev = as->chip->dev;
2088 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2089 subs->ops = audio_urb_ops[stream];
2090 else
2091 subs->ops = audio_urb_ops_high_speed[stream];
1da177e4
LT		 2092 snd_pcm_set_ops(as->pcm, stream,
2093 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2094 &snd_usb_playback_ops : &snd_usb_capture_ops);
2095
2096 list_add_tail(&fp->list, &subs->fmt_list);
2097 subs->formats |= 1ULL << fp->format;
2098 subs->endpoint = fp->endpoint;
2099 subs->num_formats++;
2100 subs->fmt_type = fp->fmt_type;
2101}
2102
2103
2104/*
2105 * free a substream
2106 */
2107static void free_substream(snd_usb_substream_t *subs)
2108{
2109 struct list_head *p, *n;
2110
2111 if (! subs->num_formats)
2112 return; /* not initialized */
2113 list_for_each_safe(p, n, &subs->fmt_list) {
2114 struct audioformat *fp = list_entry(p, struct audioformat, list);
2115 kfree(fp->rate_table);
2116 kfree(fp);
2117 }
2118}
2119
2120
2121/*
2122 * free a usb stream instance
2123 */
2124static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
2125{
2126 free_substream(&stream->substream[0]);
2127 free_substream(&stream->substream[1]);
2128 list_del(&stream->list);
2129 kfree(stream);
2130}
2131
2132static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
2133{
2134 snd_usb_stream_t *stream = pcm->private_data;
2135 if (stream) {
2136 stream->pcm = NULL;
1da177e4
LT		 2137 snd_usb_audio_stream_free(stream);
2138 }
2139}
2140
2141
2142/*
2143 * add this endpoint to the chip instance.
2144 * if a stream with the same endpoint already exists, append to it.
2145 * if not, create a new pcm stream.
2146 */
2147static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp)
2148{
2149 struct list_head *p;
2150 snd_usb_stream_t *as;
2151 snd_usb_substream_t *subs;
2152 snd_pcm_t *pcm;
2153 int err;
2154
2155 list_for_each(p, &chip->pcm_list) {
2156 as = list_entry(p, snd_usb_stream_t, list);
2157 if (as->fmt_type != fp->fmt_type)
2158 continue;
2159 subs = &as->substream[stream];
2160 if (! subs->endpoint)
2161 continue;
2162 if (subs->endpoint == fp->endpoint) {
2163 list_add_tail(&fp->list, &subs->fmt_list);
2164 subs->num_formats++;
2165 subs->formats |= 1ULL << fp->format;
2166 return 0;
2167 }
2168 }
2169 /* look for an empty stream */
2170 list_for_each(p, &chip->pcm_list) {
2171 as = list_entry(p, snd_usb_stream_t, list);
2172 if (as->fmt_type != fp->fmt_type)
2173 continue;
2174 subs = &as->substream[stream];
2175 if (subs->endpoint)
2176 continue;
2177 err = snd_pcm_new_stream(as->pcm, stream, 1);
2178 if (err < 0)
2179 return err;
2180 init_substream(as, stream, fp);
2181 return 0;
2182 }
2183
2184 /* create a new pcm */
2185 as = kmalloc(sizeof(*as), GFP_KERNEL);
2186 if (! as)
2187 return -ENOMEM;
2188 memset(as, 0, sizeof(*as));
2189 as->pcm_index = chip->pcm_devs;
2190 as->chip = chip;
2191 as->fmt_type = fp->fmt_type;
2192 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2193 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2194 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2195 &pcm);
2196 if (err < 0) {
2197 kfree(as);
2198 return err;
2199 }
2200 as->pcm = pcm;
2201 pcm->private_data = as;
2202 pcm->private_free = snd_usb_audio_pcm_free;
2203 pcm->info_flags = 0;
2204 if (chip->pcm_devs > 0)
2205 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2206 else
2207 strcpy(pcm->name, "USB Audio");
2208
2209 init_substream(as, stream, fp);
2210
2211 list_add(&as->list, &chip->pcm_list);
2212 chip->pcm_devs++;
2213
2214 proc_pcm_format_add(as);
2215
2216 return 0;
2217}
2218
2219
2220/*
2221 * check if the device uses big-endian samples
2222 */
27d10f56 2223static int is_big_endian_format(snd_usb_audio_t *chip, struct audioformat *fp)
1da177e4 2224{
27d10f56
CL		 2225 switch (chip->usb_id) {
2226 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2227 if (fp->endpoint & USB_DIR_IN)
1da177e4 2228 return 1;
27d10f56
CL		 2229 break;
2230 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2231 return 1;
1da177e4
LT		 2232 }
2233 return 0;
2234}
2235
2236/*
2237 * parse the audio format type I descriptor
2238 * and returns the corresponding pcm format
2239 *
2240 * @dev: usb device
2241 * @fp: audioformat record
2242 * @format: the format tag (wFormatTag)
2243 * @fmt: the format type descriptor
2244 */
27d10f56 2245static int parse_audio_format_i_type(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2246 int format, unsigned char *fmt)
2247{
2248 int pcm_format;
2249 int sample_width, sample_bytes;
2250
2251 /* FIXME: correct endianess and sign? */
2252 pcm_format = -1;
2253 sample_width = fmt[6];
2254 sample_bytes = fmt[5];
2255 switch (format) {
2256 case 0: /* some devices don't define this correctly... */
2257 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2258 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2259 /* fall-through */
2260 case USB_AUDIO_FORMAT_PCM:
2261 if (sample_width > sample_bytes * 8) {
2262 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2263 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2264 sample_width, sample_bytes);
2265 }
2266 /* check the format byte size */
2267 switch (fmt[5]) {
2268 case 1:
2269 pcm_format = SNDRV_PCM_FORMAT_S8;
2270 break;
2271 case 2:
27d10f56 2272 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2273 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2274 else
2275 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2276 break;
2277 case 3:
27d10f56 2278 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2279 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2280 else
2281 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2282 break;
2283 case 4:
2284 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2285 break;
2286 default:
2287 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2288 chip->dev->devnum, fp->iface,
2289 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2290 break;
2291 }
2292 break;
2293 case USB_AUDIO_FORMAT_PCM8:
2294 /* Dallas DS4201 workaround */
27d10f56 2295 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4
LT		 2296 pcm_format = SNDRV_PCM_FORMAT_S8;
2297 else
2298 pcm_format = SNDRV_PCM_FORMAT_U8;
2299 break;
2300 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2301 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2302 break;
2303 case USB_AUDIO_FORMAT_ALAW:
2304 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2305 break;
2306 case USB_AUDIO_FORMAT_MU_LAW:
2307 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2308 break;
2309 default:
2310 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2311 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2312 break;
2313 }
2314 return pcm_format;
2315}
2316
2317
2318/*
2319 * parse the format descriptor and stores the possible sample rates
2320 * on the audioformat table.
2321 *
2322 * @dev: usb device
2323 * @fp: audioformat record
2324 * @fmt: the format descriptor
2325 * @offset: the start offset of descriptor pointing the rate type
2326 * (7 for type I and II, 8 for type II)
2327 */
27d10f56 2328static int parse_audio_format_rates(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2329 unsigned char *fmt, int offset)
2330{
2331 int nr_rates = fmt[offset];
2332 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2333 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2334 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2335 return -1;
2336 }
2337
2338 if (nr_rates) {
2339 /*
2340 * build the rate table and bitmap flags
2341 */
2342 int r, idx, c;
2343 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2344 static unsigned int conv_rates[] = {
2345 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2346 64000, 88200, 96000, 176400, 192000
2347 };
2348 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2349 if (fp->rate_table == NULL) {
2350 snd_printk(KERN_ERR "cannot malloc\n");
2351 return -1;
2352 }
2353
2354 fp->nr_rates = nr_rates;
2355 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2356 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2357 unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2358 if (rate < fp->rate_min)
2359 fp->rate_min = rate;
2360 else if (rate > fp->rate_max)
2361 fp->rate_max = rate;
2362 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2363 if (rate == conv_rates[c]) {
2364 fp->rates |= (1 << c);
2365 break;
2366 }
2367 }
2368 }
2369 } else {
2370 /* continuous rates */
2371 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2372 fp->rate_min = combine_triple(&fmt[offset + 1]);
2373 fp->rate_max = combine_triple(&fmt[offset + 4]);
2374 }
2375 return 0;
2376}
2377
2378/*
2379 * parse the format type I and III descriptors
2380 */
27d10f56 2381static int parse_audio_format_i(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2382 int format, unsigned char *fmt)
2383{
2384 int pcm_format;
2385
2386 if (fmt[3] == USB_FORMAT_TYPE_III) {
2387 /* FIXME: the format type is really IECxxx
2388 * but we give normal PCM format to get the existing
2389 * apps working...
2390 */
2391 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2392 } else {
27d10f56 2393 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2394 if (pcm_format < 0)
2395 return -1;
2396 }
2397 fp->format = pcm_format;
2398 fp->channels = fmt[4];
2399 if (fp->channels < 1) {
2400 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2401 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2402 return -1;
2403 }
27d10f56 2404 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2405}
2406
2407/*
2408 * prase the format type II descriptor
2409 */
27d10f56 2410static int parse_audio_format_ii(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2411 int format, unsigned char *fmt)
2412{
2413 int brate, framesize;
2414 switch (format) {
2415 case USB_AUDIO_FORMAT_AC3:
2416 /* FIXME: there is no AC3 format defined yet */
2417 // fp->format = SNDRV_PCM_FORMAT_AC3;
2418 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2419 break;
2420 case USB_AUDIO_FORMAT_MPEG:
2421 fp->format = SNDRV_PCM_FORMAT_MPEG;
2422 break;
2423 default:
2424 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
27d10f56 2425 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2426 fp->format = SNDRV_PCM_FORMAT_MPEG;
2427 break;
2428 }
2429 fp->channels = 1;
2430 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2431 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2432 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2433 fp->frame_size = framesize;
27d10f56 2434 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2435}
2436
27d10f56 2437static int parse_audio_format(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2438 int format, unsigned char *fmt, int stream)
2439{
2440 int err;
2441
2442 switch (fmt[3]) {
2443 case USB_FORMAT_TYPE_I:
2444 case USB_FORMAT_TYPE_III:
27d10f56 2445 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2446 break;
2447 case USB_FORMAT_TYPE_II:
27d10f56 2448 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2449 break;
2450 default:
2451 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2452 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2453 return -1;
2454 }
2455 fp->fmt_type = fmt[3];
2456 if (err < 0)
2457 return err;
2458#if 1
8c1872dc 2459 /* FIXME: temporary hack for extigy/audigy 2 nx */
1da177e4
LT		 2460 /* extigy apparently supports sample rates other than 48k
2461 * but not in ordinary way. so we enable only 48k atm.
2462 */
27d10f56
CL		 2463 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2464 chip->usb_id == USB_ID(0x041e, 0x3020)) {
1da177e4 2465 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2466 fp->rates != SNDRV_PCM_RATE_48000 &&
2467 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2468 return -1;
1da177e4
LT		 2469 }
2470#endif
2471 return 0;
2472}
2473
2474static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
2475{
2476 struct usb_device *dev;
2477 struct usb_interface *iface;
2478 struct usb_host_interface *alts;
2479 struct usb_interface_descriptor *altsd;
2480 int i, altno, err, stream;
2481 int format;
2482 struct audioformat *fp;
2483 unsigned char *fmt, *csep;
2484
2485 dev = chip->dev;
2486
2487 /* parse the interface's altsettings */
2488 iface = usb_ifnum_to_if(dev, iface_no);
2489 for (i = 0; i < iface->num_altsetting; i++) {
2490 alts = &iface->altsetting[i];
2491 altsd = get_iface_desc(alts);
2492 /* skip invalid one */
2493 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2494 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2495 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2496 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2497 altsd->bNumEndpoints < 1 ||
2498 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2499 continue;
2500 /* must be isochronous */
2501 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2502 USB_ENDPOINT_XFER_ISOC)
2503 continue;
2504 /* check direction */
2505 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2506 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2507 altno = altsd->bAlternateSetting;
2508
2509 /* get audio formats */
2510 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2511 if (!fmt) {
2512 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2513 dev->devnum, iface_no, altno);
2514 continue;
2515 }
2516
2517 if (fmt[0] < 7) {
2518 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2519 dev->devnum, iface_no, altno);
2520 continue;
2521 }
2522
2523 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2524
2525 /* get format type */
2526 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2527 if (!fmt) {
2528 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2529 dev->devnum, iface_no, altno);
2530 continue;
2531 }
2532 if (fmt[0] < 8) {
2533 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2534 dev->devnum, iface_no, altno);
2535 continue;
2536 }
2537
2538 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2539 /* Creamware Noah has this descriptor after the 2nd endpoint */
2540 if (!csep && altsd->bNumEndpoints >= 2)
2541 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2542 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2543 snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2544 dev->devnum, iface_no, altno);
2545 continue;
2546 }
2547
2548 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2549 if (! fp) {
2550 snd_printk(KERN_ERR "cannot malloc\n");
2551 return -ENOMEM;
2552 }
2553
2554 memset(fp, 0, sizeof(*fp));
2555 fp->iface = iface_no;
2556 fp->altsetting = altno;
2557 fp->altset_idx = i;
2558 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2559 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
1da177e4 2560 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2561 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2562 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2563 * (fp->maxpacksize & 0x7ff);
1da177e4
LT		 2564 fp->attributes = csep[3];
2565
2566 /* some quirks for attributes here */
2567
c3f93297
CL		 2568 switch (chip->usb_id) {
2569 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2570 /* Optoplay sets the sample rate attribute although
2571 * it seems not supporting it in fact.
2572 */
2573 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2574 break;
2575 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2576 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2577 /* doesn't set the sample rate attribute, but supports it */
2578 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2579 break;
2580 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2581 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2582 an older model 77d:223) */
1da177e4
LT		 2583 /*
2584 * plantronics headset and Griffin iMic have set adaptive-in
2585 * although it's really not...
2586 */
1da177e4
LT		 2587 fp->ep_attr &= ~EP_ATTR_MASK;
2588 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2589 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2590 else
2591 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2592 break;
1da177e4
LT		 2593 }
2594
2595 /* ok, let's parse further... */
27d10f56 2596 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2597 kfree(fp->rate_table);
2598 kfree(fp);
2599 continue;
2600 }
2601
2602 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2603 err = add_audio_endpoint(chip, stream, fp);
2604 if (err < 0) {
2605 kfree(fp->rate_table);
2606 kfree(fp);
2607 return err;
2608 }
2609 /* try to set the interface... */
2610 usb_set_interface(chip->dev, iface_no, altno);
2611 init_usb_pitch(chip->dev, iface_no, alts, fp);
2612 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2613 }
2614 return 0;
2615}
2616
2617
2618/*
2619 * disconnect streams
2620 * called from snd_usb_audio_disconnect()
2621 */
ee733397 2622static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2623{
2624 int idx;
2625 snd_usb_stream_t *as;
2626 snd_usb_substream_t *subs;
2627
2628 as = list_entry(head, snd_usb_stream_t, list);
2629 for (idx = 0; idx < 2; idx++) {
2630 subs = &as->substream[idx];
2631 if (!subs->num_formats)
2632 return;
2633 release_substream_urbs(subs, 1);
2634 subs->interface = -1;
2635 }
2636}
2637
2638/*
2639 * parse audio control descriptor and create pcm/midi streams
2640 */
2641static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
2642{
2643 struct usb_device *dev = chip->dev;
2644 struct usb_host_interface *host_iface;
2645 struct usb_interface *iface;
2646 unsigned char *p1;
2647 int i, j;
2648
2649 /* find audiocontrol interface */
2650 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2651 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2652 snd_printk(KERN_ERR "cannot find HEADER\n");
2653 return -EINVAL;
2654 }
2655 if (! p1[7] || p1[0] < 8 + p1[7]) {
2656 snd_printk(KERN_ERR "invalid HEADER\n");
2657 return -EINVAL;
2658 }
2659
2660 /*
2661 * parse all USB audio streaming interfaces
2662 */
2663 for (i = 0; i < p1[7]; i++) {
2664 struct usb_host_interface *alts;
2665 struct usb_interface_descriptor *altsd;
2666 j = p1[8 + i];
2667 iface = usb_ifnum_to_if(dev, j);
2668 if (!iface) {
2669 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2670 dev->devnum, ctrlif, j);
2671 continue;
2672 }
2673 if (usb_interface_claimed(iface)) {
2674 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2675 continue;
2676 }
2677 alts = &iface->altsetting[0];
2678 altsd = get_iface_desc(alts);
2679 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2680 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2681 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2682 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2683 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2684 continue;
2685 }
2686 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2687 continue;
2688 }
2689 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2690 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2691 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2692 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2693 /* skip non-supported classes */
2694 continue;
2695 }
2696 if (! parse_audio_endpoints(chip, j)) {
2697 usb_set_interface(dev, j, 0); /* reset the current interface */
2698 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2699 }
2700 }
2701
2702 return 0;
2703}
2704
2705/*
2706 * create a stream for an endpoint/altsetting without proper descriptors
2707 */
2708static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
2709 struct usb_interface *iface,
2710 const snd_usb_audio_quirk_t *quirk)
2711{
2712 struct audioformat *fp;
2713 struct usb_host_interface *alts;
2714 int stream, err;
2715 int *rate_table = NULL;
2716
2717 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2718 if (! fp) {
2719 snd_printk(KERN_ERR "cannot malloc\n");
2720 return -ENOMEM;
2721 }
2722 memcpy(fp, quirk->data, sizeof(*fp));
2723 if (fp->nr_rates > 0) {
2724 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2725 if (!rate_table) {
2726 kfree(fp);
2727 return -ENOMEM;
2728 }
2729 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2730 fp->rate_table = rate_table;
2731 }
2732
2733 stream = (fp->endpoint & USB_DIR_IN)
2734 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2735 err = add_audio_endpoint(chip, stream, fp);
2736 if (err < 0) {
2737 kfree(fp);
2738 kfree(rate_table);
2739 return err;
2740 }
2741 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2742 fp->altset_idx >= iface->num_altsetting) {
2743 kfree(fp);
2744 kfree(rate_table);
2745 return -EINVAL;
2746 }
2747 alts = &iface->altsetting[fp->altset_idx];
2748 usb_set_interface(chip->dev, fp->iface, 0);
2749 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2750 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2751 return 0;
2752}
2753
2754/*
2755 * create a stream for an interface with proper descriptors
2756 */
d1bda045
CL		 2757static int create_standard_audio_quirk(snd_usb_audio_t *chip,
2758 struct usb_interface *iface,
2759 const snd_usb_audio_quirk_t *quirk)
1da177e4
LT		 2760{
2761 struct usb_host_interface *alts;
2762 struct usb_interface_descriptor *altsd;
2763 int err;
2764
2765 alts = &iface->altsetting[0];
2766 altsd = get_iface_desc(alts);
d1bda045 2767 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
1da177e4
LT		 2768 if (err < 0) {
2769 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2770 altsd->bInterfaceNumber, err);
2771 return err;
2772 }
d1bda045
CL		 2773 /* reset the current interface */
2774 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
1da177e4
LT		 2775 return 0;
2776}
2777
2778/*
2779 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2780 * to detect the sample rate is by looking at wMaxPacketSize.
2781 */
2782static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
854af957
CL		 2783 struct usb_interface *iface,
2784 const snd_usb_audio_quirk_t *quirk)
1da177e4
LT		 2785{
2786 static const struct audioformat ua_format = {
2787 .format = SNDRV_PCM_FORMAT_S24_3LE,
2788 .channels = 2,
2789 .fmt_type = USB_FORMAT_TYPE_I,
2790 .altsetting = 1,
2791 .altset_idx = 1,
2792 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2793 };
2794 struct usb_host_interface *alts;
2795 struct usb_interface_descriptor *altsd;
2796 struct audioformat *fp;
2797 int stream, err;
2798
2799 /* both PCM and MIDI interfaces have 2 altsettings */
2800 if (iface->num_altsetting != 2)
2801 return -ENXIO;
2802 alts = &iface->altsetting[1];
2803 altsd = get_iface_desc(alts);
2804
2805 if (altsd->bNumEndpoints == 2) {
2806 static const snd_usb_midi_endpoint_info_t ua700_ep = {
2807 .out_cables = 0x0003,
2808 .in_cables = 0x0003
2809 };
2810 static const snd_usb_audio_quirk_t ua700_quirk = {
2811 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2812 .data = &ua700_ep
2813 };
2814 static const snd_usb_midi_endpoint_info_t ua25_ep = {
2815 .out_cables = 0x0001,
2816 .in_cables = 0x0001
2817 };
2818 static const snd_usb_audio_quirk_t ua25_quirk = {
2819 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2820 .data = &ua25_ep
2821 };
27d10f56 2822 if (chip->usb_id == USB_ID(0x0582, 0x002b))
1da177e4
LT		 2823 return snd_usb_create_midi_interface(chip, iface,
2824 &ua700_quirk);
2825 else
2826 return snd_usb_create_midi_interface(chip, iface,
2827 &ua25_quirk);
2828 }
2829
2830 if (altsd->bNumEndpoints != 1)
2831 return -ENXIO;
2832
2833 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2834 if (!fp)
2835 return -ENOMEM;
2836 memcpy(fp, &ua_format, sizeof(*fp));
2837
2838 fp->iface = altsd->bInterfaceNumber;
2839 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2840 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2841 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2842
2843 switch (fp->maxpacksize) {
2844 case 0x120:
2845 fp->rate_max = fp->rate_min = 44100;
2846 break;
2847 case 0x138:
2848 case 0x140:
2849 fp->rate_max = fp->rate_min = 48000;
2850 break;
2851 case 0x258:
2852 case 0x260:
2853 fp->rate_max = fp->rate_min = 96000;
2854 break;
2855 default:
2856 snd_printk(KERN_ERR "unknown sample rate\n");
2857 kfree(fp);
2858 return -ENXIO;
2859 }
2860
2861 stream = (fp->endpoint & USB_DIR_IN)
2862 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2863 err = add_audio_endpoint(chip, stream, fp);
2864 if (err < 0) {
2865 kfree(fp);
2866 return err;
2867 }
2868 usb_set_interface(chip->dev, fp->iface, 0);
2869 return 0;
2870}
2871
2872/*
2873 * Create a stream for an Edirol UA-1000 interface.
2874 */
854af957
CL		 2875static int create_ua1000_quirk(snd_usb_audio_t *chip,
2876 struct usb_interface *iface,
2877 const snd_usb_audio_quirk_t *quirk)
1da177e4
LT		 2878{
2879 static const struct audioformat ua1000_format = {
2880 .format = SNDRV_PCM_FORMAT_S32_LE,
2881 .fmt_type = USB_FORMAT_TYPE_I,
2882 .altsetting = 1,
2883 .altset_idx = 1,
2884 .attributes = 0,
2885 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2886 };
2887 struct usb_host_interface *alts;
2888 struct usb_interface_descriptor *altsd;
2889 struct audioformat *fp;
2890 int stream, err;
2891
2892 if (iface->num_altsetting != 2)
2893 return -ENXIO;
2894 alts = &iface->altsetting[1];
2895 altsd = get_iface_desc(alts);
2896 if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2897 altsd->bNumEndpoints != 1)
2898 return -ENXIO;
2899
2900 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2901 if (!fp)
2902 return -ENOMEM;
2903 memcpy(fp, &ua1000_format, sizeof(*fp));
2904
2905 fp->channels = alts->extra[4];
2906 fp->iface = altsd->bInterfaceNumber;
2907 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2908 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2909 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2910 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2911
2912 stream = (fp->endpoint & USB_DIR_IN)
2913 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2914 err = add_audio_endpoint(chip, stream, fp);
2915 if (err < 0) {
2916 kfree(fp);
2917 return err;
2918 }
2919 /* FIXME: playback must be synchronized to capture */
2920 usb_set_interface(chip->dev, fp->iface, 0);
2921 return 0;
2922}
2923
2924static int snd_usb_create_quirk(snd_usb_audio_t *chip,
2925 struct usb_interface *iface,
2926 const snd_usb_audio_quirk_t *quirk);
2927
2928/*
2929 * handle the quirks for the contained interfaces
2930 */
2931static int create_composite_quirk(snd_usb_audio_t *chip,
2932 struct usb_interface *iface,
2933 const snd_usb_audio_quirk_t *quirk)
2934{
2935 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2936 int err;
2937
2938 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2939 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2940 if (!iface)
2941 continue;
2942 if (quirk->ifnum != probed_ifnum &&
2943 usb_interface_claimed(iface))
2944 continue;
2945 err = snd_usb_create_quirk(chip, iface, quirk);
2946 if (err < 0)
2947 return err;
2948 if (quirk->ifnum != probed_ifnum)
2949 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2950 }
2951 return 0;
2952}
2953
854af957
CL		 2954static int ignore_interface_quirk(snd_usb_audio_t *chip,
2955 struct usb_interface *iface,
2956 const snd_usb_audio_quirk_t *quirk)
2957{
2958 return 0;
2959}
2960
1da177e4
LT		 2961
2962/*
2963 * boot quirks
2964 */
2965
2966#define EXTIGY_FIRMWARE_SIZE_OLD 794
2967#define EXTIGY_FIRMWARE_SIZE_NEW 483
2968
2969static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
2970{
2971 struct usb_host_config *config = dev->actconfig;
2972 int err;
2973
2974 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
2975 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
2976 snd_printdd("sending Extigy boot sequence...\n");
2977 /* Send message to force it to reconnect with full interface. */
2978 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
2979 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
2980 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
2981 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
2982 &dev->descriptor, sizeof(dev->descriptor));
2983 config = dev->actconfig;
2984 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
2985 err = usb_reset_configuration(dev);
2986 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
2987 snd_printdd("extigy_boot: new boot length = %d\n",
2988 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
2989 return -ENODEV; /* quit this anyway */
2990 }
2991 return 0;
2992}
2993
3a2f0856
CL		 2994static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
2995{
3a2f0856
CL		 2996 u8 buf = 1;
2997
2998 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
2999 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3000 0, 0, &buf, 1, 1000);
3001 if (buf == 0) {
3002 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3003 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3004 1, 2000, NULL, 0, 1000);
3005 return -ENODEV;
3006 }
3a2f0856
CL		 3007 return 0;
3008}
3009
1da177e4
LT		 3010
3011/*
3012 * audio-interface quirks
3013 *
3014 * returns zero if no standard audio/MIDI parsing is needed.
3015 * returns a postive value if standard audio/midi interfaces are parsed
3016 * after this.
3017 * returns a negative value at error.
3018 */
3019static int snd_usb_create_quirk(snd_usb_audio_t *chip,
3020 struct usb_interface *iface,
3021 const snd_usb_audio_quirk_t *quirk)
3022{
854af957
CL		 3023 typedef int (*quirk_func_t)(snd_usb_audio_t *, struct usb_interface *,
3024 const snd_usb_audio_quirk_t *);
3025 static const quirk_func_t quirk_funcs[] = {
3026 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3027 [QUIRK_COMPOSITE] = create_composite_quirk,
3028 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3029 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3030 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3031 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3032 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3033 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3034 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3035 [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface,
d1bda045 3036 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
854af957
CL		 3037 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3038 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3039 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3040 };
3041
3042 if (quirk->type < QUIRK_TYPE_COUNT) {
3043 return quirk_funcs[quirk->type](chip, iface, quirk);
3044 } else {
1da177e4
LT		 3045 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3046 return -ENXIO;
3047 }
3048}
3049
3050
3051/*
3052 * common proc files to show the usb device info
3053 */
3054static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3055{
3056 snd_usb_audio_t *chip = entry->private_data;
3057 if (! chip->shutdown)
3058 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3059}
3060
3061static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3062{
3063 snd_usb_audio_t *chip = entry->private_data;
3064 if (! chip->shutdown)
3065 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3066 USB_ID_VENDOR(chip->usb_id),
3067 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3068}
3069
3070static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
3071{
3072 snd_info_entry_t *entry;
3073 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3074 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3075 if (! snd_card_proc_new(chip->card, "usbid", &entry))
3076 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3077}
3078
3079/*
3080 * free the chip instance
3081 *
3082 * here we have to do not much, since pcm and controls are already freed
3083 *
3084 */
3085
3086static int snd_usb_audio_free(snd_usb_audio_t *chip)
3087{
3088 kfree(chip);
3089 return 0;
3090}
3091
3092static int snd_usb_audio_dev_free(snd_device_t *device)
3093{
3094 snd_usb_audio_t *chip = device->device_data;
3095 return snd_usb_audio_free(chip);
3096}
3097
3098
3099/*
3100 * create a chip instance and set its names.
3101 */
3102static int snd_usb_audio_create(struct usb_device *dev, int idx,
3103 const snd_usb_audio_quirk_t *quirk,
3104 snd_usb_audio_t **rchip)
3105{
3106 snd_card_t *card;
3107 snd_usb_audio_t *chip;
3108 int err, len;
3109 char component[14];
3110 static snd_device_ops_t ops = {
3111 .dev_free = snd_usb_audio_dev_free,
3112 };
3113
3114 *rchip = NULL;
3115
3116 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3117 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3118 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3119 return -ENXIO;
3120 }
3121
3122 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3123 if (card == NULL) {
3124 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3125 return -ENOMEM;
3126 }
3127
561b220a 3128 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4
LT		 3129 if (! chip) {
3130 snd_card_free(card);
3131 return -ENOMEM;
3132 }
3133
3134 chip->index = idx;
3135 chip->dev = dev;
3136 chip->card = card;
27d10f56
CL		 3137 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3138 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3139 INIT_LIST_HEAD(&chip->pcm_list);
3140 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3141 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3142
3143 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3144 snd_usb_audio_free(chip);
3145 snd_card_free(card);
3146 return err;
3147 }
3148
3149 strcpy(card->driver, "USB-Audio");
3150 sprintf(component, "USB%04x:%04x",
27d10f56 3151 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3152 snd_component_add(card, component);
3153
3154 /* retrieve the device string as shortname */
3155 if (quirk && quirk->product_name) {
3156 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3157 } else {
3158 if (!dev->descriptor.iProduct ||
3159 usb_string(dev, dev->descriptor.iProduct,
3160 card->shortname, sizeof(card->shortname)) <= 0) {
3161 /* no name available from anywhere, so use ID */
3162 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3163 USB_ID_VENDOR(chip->usb_id),
3164 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3165 }
3166 }
3167
3168 /* retrieve the vendor and device strings as longname */
3169 if (quirk && quirk->vendor_name) {
3170 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3171 } else {
3172 if (dev->descriptor.iManufacturer)
3173 len = usb_string(dev, dev->descriptor.iManufacturer,
3174 card->longname, sizeof(card->longname));
3175 else
3176 len = 0;
3177 /* we don't really care if there isn't any vendor string */
3178 }
3179 if (len > 0)
3180 strlcat(card->longname, " ", sizeof(card->longname));
3181
3182 strlcat(card->longname, card->shortname, sizeof(card->longname));
3183
3184 len = strlcat(card->longname, " at ", sizeof(card->longname));
3185
3186 if (len < sizeof(card->longname))
3187 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3188
3189 strlcat(card->longname,
3190 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3191 sizeof(card->longname));
3192
3193 snd_usb_audio_create_proc(chip);
3194
1da177e4
LT		 3195 *rchip = chip;
3196 return 0;
3197}
3198
3199
3200/*
3201 * probe the active usb device
3202 *
3203 * note that this can be called multiple times per a device, when it
3204 * includes multiple audio control interfaces.
3205 *
3206 * thus we check the usb device pointer and creates the card instance
3207 * only at the first time. the successive calls of this function will
3208 * append the pcm interface to the corresponding card.
3209 */
3210static void *snd_usb_audio_probe(struct usb_device *dev,
3211 struct usb_interface *intf,
3212 const struct usb_device_id *usb_id)
3213{
1da177e4
LT		 3214 const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info;
3215 int i, err;
3216 snd_usb_audio_t *chip;
3217 struct usb_host_interface *alts;
3218 int ifnum;
27d10f56 3219 u32 id;
1da177e4
LT		 3220
3221 alts = &intf->altsetting[0];
3222 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3223 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3224 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3225
3226 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3227 goto __err_val;
3228
3229 /* SB Extigy needs special boot-up sequence */
3230 /* if more models come, this will go to the quirk list. */
27d10f56 3231 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3232 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3233 goto __err_val;
1da177e4 3234 }
3a2f0856
CL		 3235 /* SB Audigy 2 NX needs its own boot-up magic, too */
3236 if (id == USB_ID(0x041e, 0x3020)) {
3237 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3238 goto __err_val;
3239 }
1da177e4
LT		 3240
3241 /*
3242 * found a config. now register to ALSA
3243 */
3244
3245 /* check whether it's already registered */
3246 chip = NULL;
3247 down(&register_mutex);
3248 for (i = 0; i < SNDRV_CARDS; i++) {
3249 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3250 if (usb_chip[i]->shutdown) {
3251 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3252 goto __error;
3253 }
3254 chip = usb_chip[i];
3255 break;
3256 }
3257 }
3258 if (! chip) {
3259 /* it's a fresh one.
3260 * now look for an empty slot and create a new card instance
3261 */
1da177e4
LT		 3262 for (i = 0; i < SNDRV_CARDS; i++)
3263 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3264 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3265 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3266 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3267 goto __error;
3268 }
1dcd3ec4 3269 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3270 break;
3271 }
3272 if (! chip) {
3273 snd_printk(KERN_ERR "no available usb audio device\n");
3274 goto __error;
3275 }
3276 }
3277
3278 err = 1; /* continue */
3279 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3280 /* need some special handlings */
3281 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3282 goto __error;
3283 }
3284
3285 if (err > 0) {
3286 /* create normal USB audio interfaces */
3287 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3288 snd_usb_create_mixer(chip, ifnum) < 0) {
3289 goto __error;
3290 }
3291 }
3292
3293 /* we are allowed to call snd_card_register() many times */
3294 if (snd_card_register(chip->card) < 0) {
3295 goto __error;
3296 }
3297
3298 usb_chip[chip->index] = chip;
3299 chip->num_interfaces++;
3300 up(&register_mutex);
3301 return chip;
3302
3303 __error:
3304 if (chip && !chip->num_interfaces)
3305 snd_card_free(chip->card);
3306 up(&register_mutex);
3307 __err_val:
3308 return NULL;
3309}
3310
3311/*
3312 * we need to take care of counter, since disconnection can be called also
3313 * many times as well as usb_audio_probe().
3314 */
3315static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3316{
3317 snd_usb_audio_t *chip;
3318 snd_card_t *card;
3319 struct list_head *p;
3320
3321 if (ptr == (void *)-1L)
3322 return;
3323
3324 chip = ptr;
3325 card = chip->card;
3326 down(&register_mutex);
3327 chip->shutdown = 1;
3328 chip->num_interfaces--;
3329 if (chip->num_interfaces <= 0) {
3330 snd_card_disconnect(card);
3331 /* release the pcm resources */
3332 list_for_each(p, &chip->pcm_list) {
ee733397 3333 snd_usb_stream_disconnect(p);
1da177e4
LT		 3334 }
3335 /* release the midi resources */
3336 list_for_each(p, &chip->midi_list) {
ee733397 3337 snd_usbmidi_disconnect(p);
1da177e4 3338 }
84957a8a
CL		 3339 /* release mixer resources */
3340 list_for_each(p, &chip->mixer_list) {
3341 snd_usb_mixer_disconnect(p);
3342 }
1da177e4
LT		 3343 usb_chip[chip->index] = NULL;
3344 up(&register_mutex);
230cd5e2 3345 snd_card_free(card);
1da177e4
LT		 3346 } else {
3347 up(&register_mutex);
3348 }
3349}
3350
3351/*
3352 * new 2.5 USB kernel API
3353 */
3354static int usb_audio_probe(struct usb_interface *intf,
3355 const struct usb_device_id *id)
3356{
3357 void *chip;
3358 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3359 if (chip) {
3360 dev_set_drvdata(&intf->dev, chip);
3361 return 0;
3362 } else
3363 return -EIO;
3364}
3365
3366static void usb_audio_disconnect(struct usb_interface *intf)
3367{
3368 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3369 dev_get_drvdata(&intf->dev));
3370}
3371
3372
3373static int __init snd_usb_audio_init(void)
3374{
3375 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3376 printk(KERN_WARNING "invalid nrpacks value.\n");
3377 return -EINVAL;
3378 }
3379 usb_register(&usb_audio_driver);
3380 return 0;
3381}
3382
3383
3384static void __exit snd_usb_audio_cleanup(void)
3385{
3386 usb_deregister(&usb_audio_driver);
3387}
3388
3389module_init(snd_usb_audio_init);
3390module_exit(snd_usb_audio_cleanup);
Linux kernel - Deliverables
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