projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[ALSA] HP nx6110 quirks
[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 */
695 vfree_nocheck(runtime->dma_area);
696 }
697 runtime->dma_area = vmalloc_nocheck(size);
698 if (! runtime->dma_area)
699 return -ENOMEM;
700 runtime->dma_bytes = size;
701 return 0;
702}
703
704/* free virtual buffer; may be called more than once */
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) {
709 vfree_nocheck(runtime->dma_area);
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;
738 if (async) {
739 u->transfer_flags |= URB_ASYNC_UNLINK;
740 usb_unlink_urb(u);
741 } else
742 usb_kill_urb(u);
743 }
744 }
745 }
746 if (subs->syncpipe) {
747 for (i = 0; i < SYNC_URBS; i++) {
748 if (test_bit(i+16, &subs->active_mask)) {
749 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
750 struct urb *u = subs->syncurb[i].urb;
751 if (async) {
752 u->transfer_flags |= URB_ASYNC_UNLINK;
753 usb_unlink_urb(u);
754 } else
755 usb_kill_urb(u);
756 }
757 }
758 }
759 }
760 return 0;
761}
762
763
764/*
765 * set up and start data/sync urbs
766 */
767static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
768{
769 unsigned int i;
770 int err;
771
772 if (subs->stream->chip->shutdown)
773 return -EBADFD;
774
775 for (i = 0; i < subs->nurbs; i++) {
776 snd_assert(subs->dataurb[i].urb, return -EINVAL);
777 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
778 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
779 goto __error;
780 }
781 }
782 if (subs->syncpipe) {
783 for (i = 0; i < SYNC_URBS; i++) {
784 snd_assert(subs->syncurb[i].urb, return -EINVAL);
785 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
786 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
787 goto __error;
788 }
789 }
790 }
791
792 subs->active_mask = 0;
793 subs->unlink_mask = 0;
794 subs->running = 1;
795 for (i = 0; i < subs->nurbs; i++) {
796 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
797 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
798 goto __error;
799 }
800 set_bit(i, &subs->active_mask);
801 }
802 if (subs->syncpipe) {
803 for (i = 0; i < SYNC_URBS; i++) {
804 if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
805 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
806 goto __error;
807 }
808 set_bit(i + 16, &subs->active_mask);
809 }
810 }
811 return 0;
812
813 __error:
814 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
815 deactivate_urbs(subs, 0, 0);
816 return -EPIPE;
817}
818
819
820/*
821 * wait until all urbs are processed.
822 */
823static int wait_clear_urbs(snd_usb_substream_t *subs)
824{
b27c187f 825 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 826 unsigned int i;
827 int alive;
828
829 do {
830 alive = 0;
831 for (i = 0; i < subs->nurbs; i++) {
832 if (test_bit(i, &subs->active_mask))
833 alive++;
834 }
835 if (subs->syncpipe) {
836 for (i = 0; i < SYNC_URBS; i++) {
837 if (test_bit(i + 16, &subs->active_mask))
838 alive++;
839 }
840 }
841 if (! alive)
842 break;
843 set_current_state(TASK_UNINTERRUPTIBLE);
844 schedule_timeout(1);
b27c187f 845 } while (time_before(jiffies, end_time));
1da177e4
LT		 846 if (alive)
847 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
848 return 0;
849}
850
851
852/*
853 * return the current pcm pointer. just return the hwptr_done value.
854 */
855static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
856{
daa150ef
CL		 857 snd_usb_substream_t *subs;
858 snd_pcm_uframes_t hwptr_done;
859
860 subs = (snd_usb_substream_t *)substream->runtime->private_data;
861 spin_lock(&subs->lock);
862 hwptr_done = subs->hwptr_done;
863 spin_unlock(&subs->lock);
864 return hwptr_done;
1da177e4
LT		 865}
866
867
868/*
869 * start/stop substream
870 */
871static int snd_usb_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
872{
873 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
874 int err;
875
876 switch (cmd) {
877 case SNDRV_PCM_TRIGGER_START:
878 err = start_urbs(subs, substream->runtime);
879 break;
880 case SNDRV_PCM_TRIGGER_STOP:
881 err = deactivate_urbs(subs, 0, 0);
882 break;
883 default:
884 err = -EINVAL;
885 break;
886 }
887 return err < 0 ? err : 0;
888}
889
890
891/*
892 * release a urb data
893 */
894static void release_urb_ctx(snd_urb_ctx_t *u)
895{
896 if (u->urb) {
55851f73
CL		 897 if (u->buffer_size)
898 usb_buffer_free(u->subs->dev, u->buffer_size,
899 u->urb->transfer_buffer,
900 u->urb->transfer_dma);
1da177e4
LT		 901 usb_free_urb(u->urb);
902 u->urb = NULL;
903 }
1da177e4
LT		 904}
905
906/*
907 * release a substream
908 */
909static void release_substream_urbs(snd_usb_substream_t *subs, int force)
910{
911 int i;
912
913 /* stop urbs (to be sure) */
914 deactivate_urbs(subs, force, 1);
915 wait_clear_urbs(subs);
916
917 for (i = 0; i < MAX_URBS; i++)
918 release_urb_ctx(&subs->dataurb[i]);
919 for (i = 0; i < SYNC_URBS; i++)
920 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 921 usb_buffer_free(subs->dev, SYNC_URBS * 4,
922 subs->syncbuf, subs->sync_dma);
923 subs->syncbuf = NULL;
1da177e4
LT		 924 subs->nurbs = 0;
925}
926
927/*
928 * initialize a substream for plaback/capture
929 */
930static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes,
931 unsigned int rate, unsigned int frame_bits)
932{
933 unsigned int maxsize, n, i;
934 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
a93bf990 935 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 936
937 /* calculate the frequency in 16.16 format */
938 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
939 subs->freqn = get_usb_full_speed_rate(rate);
940 else
941 subs->freqn = get_usb_high_speed_rate(rate);
942 subs->freqm = subs->freqn;
573567e0
CL		 943 /* calculate max. frequency */
944 if (subs->maxpacksize) {
945 /* whatever fits into a max. size packet */
1da177e4 946 maxsize = subs->maxpacksize;
573567e0
CL		 947 subs->freqmax = (maxsize / (frame_bits >> 3))
948 << (16 - subs->datainterval);
949 } else {
950 /* no max. packet size: just take 25% higher than nominal */
951 subs->freqmax = subs->freqn + (subs->freqn >> 2);
952 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
953 >> (16 - subs->datainterval);
1da177e4 954 }
573567e0 955 subs->phase = 0;
1da177e4
LT		 956
957 if (subs->fill_max)
958 subs->curpacksize = subs->maxpacksize;
959 else
960 subs->curpacksize = maxsize;
961
a93bf990
CL		 962 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
963 packs_per_ms = 8 >> subs->datainterval;
964 else
965 packs_per_ms = 1;
9624ea81 966 subs->packs_per_ms = packs_per_ms;
a93bf990 967
71d848ca 968 if (is_playback) {
1da177e4 969 urb_packs = nrpacks;
71d848ca
CL		 970 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
971 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
972 } else
15a24c07 973 urb_packs = 1;
a93bf990 974 urb_packs *= packs_per_ms;
1da177e4 975
1da177e4 976 /* decide how many packets to be used */
15a24c07 977 if (is_playback) {
d6db392e
CL		 978 unsigned int minsize;
979 /* determine how small a packet can be */
980 minsize = (subs->freqn >> (16 - subs->datainterval))
981 * (frame_bits >> 3);
7efd8bc8 982 /* with sync from device, assume it can be 12% lower */
d6db392e 983 if (subs->syncpipe)
7efd8bc8 984 minsize -= minsize >> 3;
d6db392e
CL		 985 minsize = max(minsize, 1u);
986 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990
CL		 987 /* round up to multiple of packs_per_ms */
988 total_packs = (total_packs + packs_per_ms - 1)
989 & ~(packs_per_ms - 1);
990 /* we need at least two URBs for queueing */
991 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
992 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
15a24c07
CL		 993 } else {
994 total_packs = MAX_URBS * urb_packs;
995 }
1da177e4
LT		 996 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
997 if (subs->nurbs > MAX_URBS) {
998 /* too much... */
999 subs->nurbs = MAX_URBS;
1000 total_packs = MAX_URBS * urb_packs;
1001 }
1002 n = total_packs;
1003 for (i = 0; i < subs->nurbs; i++) {
1004 npacks[i] = n > urb_packs ? urb_packs : n;
1005 n -= urb_packs;
1006 }
1007 if (subs->nurbs <= 1) {
1008 /* too little - we need at least two packets
1009 * to ensure contiguous playback/capture
1010 */
1011 subs->nurbs = 2;
1012 npacks[0] = (total_packs + 1) / 2;
1013 npacks[1] = total_packs - npacks[0];
a93bf990 1014 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1da177e4
LT		 1015 /* the last packet is too small.. */
1016 if (subs->nurbs > 2) {
1017 /* merge to the first one */
1018 npacks[0] += npacks[subs->nurbs - 1];
1019 subs->nurbs--;
1020 } else {
1021 /* divide to two */
1022 subs->nurbs = 2;
1023 npacks[0] = (total_packs + 1) / 2;
1024 npacks[1] = total_packs - npacks[0];
1025 }
1026 }
1027
1028 /* allocate and initialize data urbs */
1029 for (i = 0; i < subs->nurbs; i++) {
1030 snd_urb_ctx_t *u = &subs->dataurb[i];
1031 u->index = i;
1032 u->subs = subs;
1da177e4 1033 u->packets = npacks[i];
55851f73 1034 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1035 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1036 u->packets++; /* for transfer delimiter */
1da177e4 1037 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
55851f73
CL		 1038 if (! u->urb)
1039 goto out_of_memory;
1040 u->urb->transfer_buffer =
1041 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1042 &u->urb->transfer_dma);
1043 if (! u->urb->transfer_buffer)
1044 goto out_of_memory;
1da177e4 1045 u->urb->pipe = subs->datapipe;
55851f73 1046 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1047 u->urb->interval = 1 << subs->datainterval;
1da177e4
LT		 1048 u->urb->context = u;
1049 u->urb->complete = snd_usb_complete_callback(snd_complete_urb);
1050 }
1051
1052 if (subs->syncpipe) {
1053 /* allocate and initialize sync urbs */
55851f73
CL		 1054 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1055 GFP_KERNEL, &subs->sync_dma);
1056 if (! subs->syncbuf)
1057 goto out_of_memory;
1da177e4
LT		 1058 for (i = 0; i < SYNC_URBS; i++) {
1059 snd_urb_ctx_t *u = &subs->syncurb[i];
1060 u->index = i;
1061 u->subs = subs;
ca81090a
CL		 1062 u->packets = 1;
1063 u->urb = usb_alloc_urb(1, GFP_KERNEL);
55851f73
CL		 1064 if (! u->urb)
1065 goto out_of_memory;
ca81090a 1066 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1067 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1068 u->urb->transfer_buffer_length = 4;
1da177e4 1069 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1070 u->urb->transfer_flags = URB_ISO_ASAP |
1071 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1072 u->urb->number_of_packets = 1;
1149a64f 1073 u->urb->interval = 1 << subs->syncinterval;
1da177e4
LT		 1074 u->urb->context = u;
1075 u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb);
1076 }
1077 }
1078 return 0;
55851f73
CL		 1079
1080out_of_memory:
1081 release_substream_urbs(subs, 0);
1082 return -ENOMEM;
1da177e4
LT		 1083}
1084
1085
1086/*
1087 * find a matching audio format
1088 */
1089static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format,
1090 unsigned int rate, unsigned int channels)
1091{
1092 struct list_head *p;
1093 struct audioformat *found = NULL;
1094 int cur_attr = 0, attr;
1095
1096 list_for_each(p, &subs->fmt_list) {
1097 struct audioformat *fp;
1098 fp = list_entry(p, struct audioformat, list);
1099 if (fp->format != format || fp->channels != channels)
1100 continue;
1101 if (rate < fp->rate_min || rate > fp->rate_max)
1102 continue;
1103 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1104 unsigned int i;
1105 for (i = 0; i < fp->nr_rates; i++)
1106 if (fp->rate_table[i] == rate)
1107 break;
1108 if (i >= fp->nr_rates)
1109 continue;
1110 }
1111 attr = fp->ep_attr & EP_ATTR_MASK;
1112 if (! found) {
1113 found = fp;
1114 cur_attr = attr;
1115 continue;
1116 }
1117 /* avoid async out and adaptive in if the other method
1118 * supports the same format.
1119 * this is a workaround for the case like
1120 * M-audio audiophile USB.
1121 */
1122 if (attr != cur_attr) {
1123 if ((attr == EP_ATTR_ASYNC &&
1124 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1125 (attr == EP_ATTR_ADAPTIVE &&
1126 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1127 continue;
1128 if ((cur_attr == EP_ATTR_ASYNC &&
1129 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1130 (cur_attr == EP_ATTR_ADAPTIVE &&
1131 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1132 found = fp;
1133 cur_attr = attr;
1134 continue;
1135 }
1136 }
1137 /* find the format with the largest max. packet size */
1138 if (fp->maxpacksize > found->maxpacksize) {
1139 found = fp;
1140 cur_attr = attr;
1141 }
1142 }
1143 return found;
1144}
1145
1146
1147/*
1148 * initialize the picth control and sample rate
1149 */
1150static int init_usb_pitch(struct usb_device *dev, int iface,
1151 struct usb_host_interface *alts,
1152 struct audioformat *fmt)
1153{
1154 unsigned int ep;
1155 unsigned char data[1];
1156 int err;
1157
1158 ep = get_endpoint(alts, 0)->bEndpointAddress;
1159 /* if endpoint has pitch control, enable it */
1160 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1161 data[0] = 1;
1162 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1163 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1164 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1165 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1166 dev->devnum, iface, ep);
1167 return err;
1168 }
1169 }
1170 return 0;
1171}
1172
1173static int init_usb_sample_rate(struct usb_device *dev, int iface,
1174 struct usb_host_interface *alts,
1175 struct audioformat *fmt, int rate)
1176{
1177 unsigned int ep;
1178 unsigned char data[3];
1179 int err;
1180
1181 ep = get_endpoint(alts, 0)->bEndpointAddress;
1182 /* if endpoint has sampling rate control, set it */
1183 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1184 int crate;
1185 data[0] = rate;
1186 data[1] = rate >> 8;
1187 data[2] = rate >> 16;
1188 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1189 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1190 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1191 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1192 dev->devnum, iface, fmt->altsetting, rate, ep);
1193 return err;
1194 }
1195 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1196 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1197 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1198 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1199 dev->devnum, iface, fmt->altsetting, ep);
1200 return 0; /* some devices don't support reading */
1201 }
1202 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1203 if (crate != rate) {
1204 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1205 // runtime->rate = crate;
1206 }
1207 }
1208 return 0;
1209}
1210
1211/*
1212 * find a matching format and set up the interface
1213 */
1214static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
1215{
1216 struct usb_device *dev = subs->dev;
1217 struct usb_host_interface *alts;
1218 struct usb_interface_descriptor *altsd;
1219 struct usb_interface *iface;
1220 unsigned int ep, attr;
1221 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1222 int err;
1223
1224 iface = usb_ifnum_to_if(dev, fmt->iface);
1225 snd_assert(iface, return -EINVAL);
1226 alts = &iface->altsetting[fmt->altset_idx];
1227 altsd = get_iface_desc(alts);
1228 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1229
1230 if (fmt == subs->cur_audiofmt)
1231 return 0;
1232
1233 /* close the old interface */
1234 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1235 usb_set_interface(subs->dev, subs->interface, 0);
1236 subs->interface = -1;
1237 subs->format = 0;
1238 }
1239
1240 /* set interface */
1241 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1242 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1243 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1244 dev->devnum, fmt->iface, fmt->altsetting);
1245 return -EIO;
1246 }
1247 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1248 subs->interface = fmt->iface;
1249 subs->format = fmt->altset_idx;
1250 }
1251
1252 /* create a data pipe */
1253 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1254 if (is_playback)
1255 subs->datapipe = usb_sndisocpipe(dev, ep);
1256 else
1257 subs->datapipe = usb_rcvisocpipe(dev, ep);
573567e0
CL		 1258 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1259 get_endpoint(alts, 0)->bInterval >= 1 &&
1260 get_endpoint(alts, 0)->bInterval <= 4)
1261 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1262 else
1263 subs->datainterval = 0;
1da177e4
LT		 1264 subs->syncpipe = subs->syncinterval = 0;
1265 subs->maxpacksize = fmt->maxpacksize;
1266 subs->fill_max = 0;
1267
1268 /* we need a sync pipe in async OUT or adaptive IN mode */
1269 /* check the number of EP, since some devices have broken
1270 * descriptors which fool us. if it has only one EP,
1271 * assume it as adaptive-out or sync-in.
1272 */
1273 attr = fmt->ep_attr & EP_ATTR_MASK;
1274 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1275 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1276 altsd->bNumEndpoints >= 2) {
1277 /* check sync-pipe endpoint */
1278 /* ... and check descriptor size before accessing bSynchAddress
1279 because there is a version of the SB Audigy 2 NX firmware lacking
1280 the audio fields in the endpoint descriptors */
1281 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1282 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1283 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1284 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1285 dev->devnum, fmt->iface, fmt->altsetting);
1286 return -EINVAL;
1287 }
1288 ep = get_endpoint(alts, 1)->bEndpointAddress;
1289 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1290 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1291 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1292 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1293 dev->devnum, fmt->iface, fmt->altsetting);
1294 return -EINVAL;
1295 }
1296 ep &= USB_ENDPOINT_NUMBER_MASK;
1297 if (is_playback)
1298 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1299 else
1300 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1301 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1302 get_endpoint(alts, 1)->bRefresh >= 1 &&
1303 get_endpoint(alts, 1)->bRefresh <= 9)
1304 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1305 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1306 subs->syncinterval = 1;
604cf499
CL		 1307 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1308 get_endpoint(alts, 1)->bInterval <= 16)
1309 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1310 else
1311 subs->syncinterval = 3;
1da177e4
LT		 1312 }
1313
1314 /* always fill max packet size */
1315 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1316 subs->fill_max = 1;
1317
1318 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1319 return err;
1320
1321 subs->cur_audiofmt = fmt;
1322
1323#if 0
1324 printk("setting done: format = %d, rate = %d, channels = %d\n",
1325 fmt->format, fmt->rate, fmt->channels);
1326 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1327 subs->datapipe, subs->syncpipe);
1328#endif
1329
1330 return 0;
1331}
1332
1333/*
1334 * hw_params callback
1335 *
1336 * allocate a buffer and set the given audio format.
1337 *
1338 * so far we use a physically linear buffer although packetize transfer
1339 * doesn't need a continuous area.
1340 * if sg buffer is supported on the later version of alsa, we'll follow
1341 * that.
1342 */
1343static int snd_usb_hw_params(snd_pcm_substream_t *substream,
1344 snd_pcm_hw_params_t *hw_params)
1345{
1346 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1347 struct audioformat *fmt;
1348 unsigned int channels, rate, format;
1349 int ret, changed;
1350
6207e51b
CL		 1351 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1352 params_buffer_bytes(hw_params));
1da177e4
LT		 1353 if (ret < 0)
1354 return ret;
1355
1356 format = params_format(hw_params);
1357 rate = params_rate(hw_params);
1358 channels = params_channels(hw_params);
1359 fmt = find_format(subs, format, rate, channels);
1360 if (! fmt) {
1361 snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
1362 snd_pcm_format_name(format), rate, channels);
1363 return -EINVAL;
1364 }
1365
1366 changed = subs->cur_audiofmt != fmt ||
1367 subs->period_bytes != params_period_bytes(hw_params) ||
1368 subs->cur_rate != rate;
1369 if ((ret = set_format(subs, fmt)) < 0)
1370 return ret;
1371
1372 if (subs->cur_rate != rate) {
1373 struct usb_host_interface *alts;
1374 struct usb_interface *iface;
1375 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1376 alts = &iface->altsetting[fmt->altset_idx];
1377 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1378 if (ret < 0)
1379 return ret;
1380 subs->cur_rate = rate;
1381 }
1382
1383 if (changed) {
1384 /* format changed */
1385 release_substream_urbs(subs, 0);
1386 /* influenced: period_bytes, channels, rate, format, */
1387 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1388 params_rate(hw_params),
1389 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1390 }
1391
1392 return ret;
1393}
1394
1395/*
1396 * hw_free callback
1397 *
1398 * reset the audio format and release the buffer
1399 */
1400static int snd_usb_hw_free(snd_pcm_substream_t *substream)
1401{
1402 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1403
1404 subs->cur_audiofmt = NULL;
1405 subs->cur_rate = 0;
1406 subs->period_bytes = 0;
1407 release_substream_urbs(subs, 0);
6207e51b 1408 return snd_pcm_free_vmalloc_buffer(substream);
1da177e4
LT		 1409}
1410
1411/*
1412 * prepare callback
1413 *
1414 * only a few subtle things...
1415 */
1416static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
1417{
1418 snd_pcm_runtime_t *runtime = substream->runtime;
1419 snd_usb_substream_t *subs = (snd_usb_substream_t *)runtime->private_data;
1420
1421 if (! subs->cur_audiofmt) {
1422 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1423 return -ENXIO;
1424 }
1425
1426 /* some unit conversions in runtime */
1427 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1428 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1429
1430 /* reset the pointer */
1da177e4 1431 subs->hwptr_done = 0;
1da177e4
LT		 1432 subs->transfer_done = 0;
1433 subs->phase = 0;
1434
1435 /* clear urbs (to be sure) */
1436 deactivate_urbs(subs, 0, 1);
1437 wait_clear_urbs(subs);
1438
1439 return 0;
1440}
1441
1442static snd_pcm_hardware_t snd_usb_playback =
1443{
1444 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1445 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1446 SNDRV_PCM_INFO_MMAP_VALID),
6207e51b 1447 .buffer_bytes_max = (256*1024),
1da177e4
LT		 1448 .period_bytes_min = 64,
1449 .period_bytes_max = (128*1024),
1450 .periods_min = 2,
1451 .periods_max = 1024,
1452};
1453
1454static snd_pcm_hardware_t snd_usb_capture =
1455{
1456 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1457 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1458 SNDRV_PCM_INFO_MMAP_VALID),
6207e51b 1459 .buffer_bytes_max = (256*1024),
1da177e4
LT		 1460 .period_bytes_min = 64,
1461 .period_bytes_max = (128*1024),
1462 .periods_min = 2,
1463 .periods_max = 1024,
1464};
1465
1466/*
1467 * h/w constraints
1468 */
1469
1470#ifdef HW_CONST_DEBUG
1471#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1472#else
1473#define hwc_debug(fmt, args...) /**/
1474#endif
1475
1476static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp)
1477{
1478 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1479 snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1480 snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1481
1482 /* check the format */
1483 if (! snd_mask_test(fmts, fp->format)) {
1484 hwc_debug(" > check: no supported format %d\n", fp->format);
1485 return 0;
1486 }
1487 /* check the channels */
1488 if (fp->channels < ct->min || fp->channels > ct->max) {
1489 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1490 return 0;
1491 }
1492 /* check the rate is within the range */
1493 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1494 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1495 return 0;
1496 }
1497 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1498 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1499 return 0;
1500 }
1501 return 1;
1502}
1503
1504static int hw_rule_rate(snd_pcm_hw_params_t *params,
1505 snd_pcm_hw_rule_t *rule)
1506{
1507 snd_usb_substream_t *subs = rule->private;
1508 struct list_head *p;
1509 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1510 unsigned int rmin, rmax;
1511 int changed;
1512
1513 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1514 changed = 0;
1515 rmin = rmax = 0;
1516 list_for_each(p, &subs->fmt_list) {
1517 struct audioformat *fp;
1518 fp = list_entry(p, struct audioformat, list);
1519 if (! hw_check_valid_format(params, fp))
1520 continue;
1521 if (changed++) {
1522 if (rmin > fp->rate_min)
1523 rmin = fp->rate_min;
1524 if (rmax < fp->rate_max)
1525 rmax = fp->rate_max;
1526 } else {
1527 rmin = fp->rate_min;
1528 rmax = fp->rate_max;
1529 }
1530 }
1531
1532 if (! changed) {
1533 hwc_debug(" --> get empty\n");
1534 it->empty = 1;
1535 return -EINVAL;
1536 }
1537
1538 changed = 0;
1539 if (it->min < rmin) {
1540 it->min = rmin;
1541 it->openmin = 0;
1542 changed = 1;
1543 }
1544 if (it->max > rmax) {
1545 it->max = rmax;
1546 it->openmax = 0;
1547 changed = 1;
1548 }
1549 if (snd_interval_checkempty(it)) {
1550 it->empty = 1;
1551 return -EINVAL;
1552 }
1553 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1554 return changed;
1555}
1556
1557
1558static int hw_rule_channels(snd_pcm_hw_params_t *params,
1559 snd_pcm_hw_rule_t *rule)
1560{
1561 snd_usb_substream_t *subs = rule->private;
1562 struct list_head *p;
1563 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1564 unsigned int rmin, rmax;
1565 int changed;
1566
1567 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1568 changed = 0;
1569 rmin = rmax = 0;
1570 list_for_each(p, &subs->fmt_list) {
1571 struct audioformat *fp;
1572 fp = list_entry(p, struct audioformat, list);
1573 if (! hw_check_valid_format(params, fp))
1574 continue;
1575 if (changed++) {
1576 if (rmin > fp->channels)
1577 rmin = fp->channels;
1578 if (rmax < fp->channels)
1579 rmax = fp->channels;
1580 } else {
1581 rmin = fp->channels;
1582 rmax = fp->channels;
1583 }
1584 }
1585
1586 if (! changed) {
1587 hwc_debug(" --> get empty\n");
1588 it->empty = 1;
1589 return -EINVAL;
1590 }
1591
1592 changed = 0;
1593 if (it->min < rmin) {
1594 it->min = rmin;
1595 it->openmin = 0;
1596 changed = 1;
1597 }
1598 if (it->max > rmax) {
1599 it->max = rmax;
1600 it->openmax = 0;
1601 changed = 1;
1602 }
1603 if (snd_interval_checkempty(it)) {
1604 it->empty = 1;
1605 return -EINVAL;
1606 }
1607 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1608 return changed;
1609}
1610
1611static int hw_rule_format(snd_pcm_hw_params_t *params,
1612 snd_pcm_hw_rule_t *rule)
1613{
1614 snd_usb_substream_t *subs = rule->private;
1615 struct list_head *p;
1616 snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1617 u64 fbits;
1618 u32 oldbits[2];
1619 int changed;
1620
1621 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1622 fbits = 0;
1623 list_for_each(p, &subs->fmt_list) {
1624 struct audioformat *fp;
1625 fp = list_entry(p, struct audioformat, list);
1626 if (! hw_check_valid_format(params, fp))
1627 continue;
1628 fbits |= (1ULL << fp->format);
1629 }
1630
1631 oldbits[0] = fmt->bits[0];
1632 oldbits[1] = fmt->bits[1];
1633 fmt->bits[0] &= (u32)fbits;
1634 fmt->bits[1] &= (u32)(fbits >> 32);
1635 if (! fmt->bits[0] && ! fmt->bits[1]) {
1636 hwc_debug(" --> get empty\n");
1637 return -EINVAL;
1638 }
1639 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1640 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1641 return changed;
1642}
1643
1644#define MAX_MASK 64
1645
1646/*
1647 * check whether the registered audio formats need special hw-constraints
1648 */
1649static int check_hw_params_convention(snd_usb_substream_t *subs)
1650{
1651 int i;
1652 u32 *channels;
1653 u32 *rates;
1654 u32 cmaster, rmaster;
1655 u32 rate_min = 0, rate_max = 0;
1656 struct list_head *p;
1657 int err = 1;
1658
1659 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1660 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1661
1662 list_for_each(p, &subs->fmt_list) {
1663 struct audioformat *f;
1664 f = list_entry(p, struct audioformat, list);
1665 /* unconventional channels? */
1666 if (f->channels > 32)
1667 goto __out;
1668 /* continuous rate min/max matches? */
1669 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1670 if (rate_min && f->rate_min != rate_min)
1671 goto __out;
1672 if (rate_max && f->rate_max != rate_max)
1673 goto __out;
1674 rate_min = f->rate_min;
1675 rate_max = f->rate_max;
1676 }
1677 /* combination of continuous rates and fixed rates? */
1678 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1679 if (f->rates != rates[f->format])
1680 goto __out;
1681 }
1682 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1683 if (rates[f->format] && rates[f->format] != f->rates)
1684 goto __out;
1685 }
1686 channels[f->format] |= (1 << f->channels);
1687 rates[f->format] |= f->rates;
1688 }
1689 /* check whether channels and rates match for all formats */
1690 cmaster = rmaster = 0;
1691 for (i = 0; i < MAX_MASK; i++) {
1692 if (cmaster != channels[i] && cmaster && channels[i])
1693 goto __out;
1694 if (rmaster != rates[i] && rmaster && rates[i])
1695 goto __out;
1696 if (channels[i])
1697 cmaster = channels[i];
1698 if (rates[i])
1699 rmaster = rates[i];
1700 }
1701 /* check whether channels match for all distinct rates */
1702 memset(channels, 0, MAX_MASK * sizeof(u32));
1703 list_for_each(p, &subs->fmt_list) {
1704 struct audioformat *f;
1705 f = list_entry(p, struct audioformat, list);
1706 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1707 continue;
1708 for (i = 0; i < 32; i++) {
1709 if (f->rates & (1 << i))
1710 channels[i] |= (1 << f->channels);
1711 }
1712 }
1713 cmaster = 0;
1714 for (i = 0; i < 32; i++) {
1715 if (cmaster != channels[i] && cmaster && channels[i])
1716 goto __out;
1717 if (channels[i])
1718 cmaster = channels[i];
1719 }
1720 err = 0;
1721
1722 __out:
1723 kfree(channels);
1724 kfree(rates);
1725 return err;
1726}
1727
1728
1729/*
1730 * set up the runtime hardware information.
1731 */
1732
1733static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
1734{
1735 struct list_head *p;
1736 int err;
1737
1738 runtime->hw.formats = subs->formats;
1739
1740 runtime->hw.rate_min = 0x7fffffff;
1741 runtime->hw.rate_max = 0;
1742 runtime->hw.channels_min = 256;
1743 runtime->hw.channels_max = 0;
1744 runtime->hw.rates = 0;
1745 /* check min/max rates and channels */
1746 list_for_each(p, &subs->fmt_list) {
1747 struct audioformat *fp;
1748 fp = list_entry(p, struct audioformat, list);
1749 runtime->hw.rates |= fp->rates;
1750 if (runtime->hw.rate_min > fp->rate_min)
1751 runtime->hw.rate_min = fp->rate_min;
1752 if (runtime->hw.rate_max < fp->rate_max)
1753 runtime->hw.rate_max = fp->rate_max;
1754 if (runtime->hw.channels_min > fp->channels)
1755 runtime->hw.channels_min = fp->channels;
1756 if (runtime->hw.channels_max < fp->channels)
1757 runtime->hw.channels_max = fp->channels;
1758 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1759 /* FIXME: there might be more than one audio formats... */
1760 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1761 fp->frame_size;
1762 }
1763 }
1764
1765 /* set the period time minimum 1ms */
1766 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1767 1000 * MIN_PACKS_URB,
1768 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1769
1770 if (check_hw_params_convention(subs)) {
1771 hwc_debug("setting extra hw constraints...\n");
1772 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1773 hw_rule_rate, subs,
1774 SNDRV_PCM_HW_PARAM_FORMAT,
1775 SNDRV_PCM_HW_PARAM_CHANNELS,
1776 -1)) < 0)
1777 return err;
1778 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1779 hw_rule_channels, subs,
1780 SNDRV_PCM_HW_PARAM_FORMAT,
1781 SNDRV_PCM_HW_PARAM_RATE,
1782 -1)) < 0)
1783 return err;
1784 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1785 hw_rule_format, subs,
1786 SNDRV_PCM_HW_PARAM_RATE,
1787 SNDRV_PCM_HW_PARAM_CHANNELS,
1788 -1)) < 0)
1789 return err;
1790 }
1791 return 0;
1792}
1793
1794static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
1795 snd_pcm_hardware_t *hw)
1796{
1797 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1798 snd_pcm_runtime_t *runtime = substream->runtime;
1799 snd_usb_substream_t *subs = &as->substream[direction];
1800
1801 subs->interface = -1;
1802 subs->format = 0;
1803 runtime->hw = *hw;
1804 runtime->private_data = subs;
1805 subs->pcm_substream = substream;
1806 return setup_hw_info(runtime, subs);
1807}
1808
1809static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
1810{
1811 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1812 snd_usb_substream_t *subs = &as->substream[direction];
1813
1814 if (subs->interface >= 0) {
1815 usb_set_interface(subs->dev, subs->interface, 0);
1816 subs->interface = -1;
1817 }
1818 subs->pcm_substream = NULL;
1819 return 0;
1820}
1821
1822static int snd_usb_playback_open(snd_pcm_substream_t *substream)
1823{
1824 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1825}
1826
1827static int snd_usb_playback_close(snd_pcm_substream_t *substream)
1828{
1829 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1830}
1831
1832static int snd_usb_capture_open(snd_pcm_substream_t *substream)
1833{
1834 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1835}
1836
1837static int snd_usb_capture_close(snd_pcm_substream_t *substream)
1838{
1839 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1840}
1841
1842static snd_pcm_ops_t snd_usb_playback_ops = {
1843 .open = snd_usb_playback_open,
1844 .close = snd_usb_playback_close,
1845 .ioctl = snd_pcm_lib_ioctl,
1846 .hw_params = snd_usb_hw_params,
1847 .hw_free = snd_usb_hw_free,
1848 .prepare = snd_usb_pcm_prepare,
1849 .trigger = snd_usb_pcm_trigger,
1850 .pointer = snd_usb_pcm_pointer,
6207e51b 1851 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1852};
1853
1854static snd_pcm_ops_t snd_usb_capture_ops = {
1855 .open = snd_usb_capture_open,
1856 .close = snd_usb_capture_close,
1857 .ioctl = snd_pcm_lib_ioctl,
1858 .hw_params = snd_usb_hw_params,
1859 .hw_free = snd_usb_hw_free,
1860 .prepare = snd_usb_pcm_prepare,
1861 .trigger = snd_usb_pcm_trigger,
1862 .pointer = snd_usb_pcm_pointer,
6207e51b 1863 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1864};
1865
1866
1867
1868/*
1869 * helper functions
1870 */
1871
1872/*
1873 * combine bytes and get an integer value
1874 */
1875unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1876{
1877 switch (size) {
1878 case 1: return *bytes;
1879 case 2: return combine_word(bytes);
1880 case 3: return combine_triple(bytes);
1881 case 4: return combine_quad(bytes);
1882 default: return 0;
1883 }
1884}
1885
1886/*
1887 * parse descriptor buffer and return the pointer starting the given
1888 * descriptor type.
1889 */
1890void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1891{
1892 u8 *p, *end, *next;
1893
1894 p = descstart;
1895 end = p + desclen;
1896 for (; p < end;) {
1897 if (p[0] < 2)
1898 return NULL;
1899 next = p + p[0];
1900 if (next > end)
1901 return NULL;
1902 if (p[1] == dtype && (!after || (void *)p > after)) {
1903 return p;
1904 }
1905 p = next;
1906 }
1907 return NULL;
1908}
1909
1910/*
1911 * find a class-specified interface descriptor with the given subtype.
1912 */
1913void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1914{
1915 unsigned char *p = after;
1916
1917 while ((p = snd_usb_find_desc(buffer, buflen, p,
1918 USB_DT_CS_INTERFACE)) != NULL) {
1919 if (p[0] >= 3 && p[2] == dsubtype)
1920 return p;
1921 }
1922 return NULL;
1923}
1924
1925/*
1926 * Wrapper for usb_control_msg().
1927 * Allocates a temp buffer to prevent dmaing from/to the stack.
1928 */
1929int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1930 __u8 requesttype, __u16 value, __u16 index, void *data,
1931 __u16 size, int timeout)
1932{
1933 int err;
1934 void *buf = NULL;
1935
1936 if (size > 0) {
1937 buf = kmalloc(size, GFP_KERNEL);
1938 if (!buf)
1939 return -ENOMEM;
1940 memcpy(buf, data, size);
1941 }
1942 err = usb_control_msg(dev, pipe, request, requesttype,
1943 value, index, buf, size, timeout);
1944 if (size > 0) {
1945 memcpy(data, buf, size);
1946 kfree(buf);
1947 }
1948 return err;
1949}
1950
1951
1952/*
1953 * entry point for linux usb interface
1954 */
1955
1956static int usb_audio_probe(struct usb_interface *intf,
1957 const struct usb_device_id *id);
1958static void usb_audio_disconnect(struct usb_interface *intf);
1959
1960static struct usb_device_id usb_audio_ids [] = {
1961#include "usbquirks.h"
1962 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1963 .bInterfaceClass = USB_CLASS_AUDIO,
1964 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
1965 { } /* Terminating entry */
1966};
1967
1968MODULE_DEVICE_TABLE (usb, usb_audio_ids);
1969
1970static struct usb_driver usb_audio_driver = {
1971 .owner = THIS_MODULE,
1972 .name = "snd-usb-audio",
1973 .probe = usb_audio_probe,
1974 .disconnect = usb_audio_disconnect,
1975 .id_table = usb_audio_ids,
1976};
1977
1978
1979/*
1980 * proc interface for list the supported pcm formats
1981 */
1982static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
1983{
1984 struct list_head *p;
1985 static char *sync_types[4] = {
1986 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
1987 };
1988
1989 list_for_each(p, &subs->fmt_list) {
1990 struct audioformat *fp;
1991 fp = list_entry(p, struct audioformat, list);
1992 snd_iprintf(buffer, " Interface %d\n", fp->iface);
1993 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
1994 snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
1995 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
1996 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
1997 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
1998 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
1999 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2000 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2001 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2002 fp->rate_min, fp->rate_max);
2003 } else {
2004 unsigned int i;
2005 snd_iprintf(buffer, " Rates: ");
2006 for (i = 0; i < fp->nr_rates; i++) {
2007 if (i > 0)
2008 snd_iprintf(buffer, ", ");
2009 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2010 }
2011 snd_iprintf(buffer, "\n");
2012 }
2013 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2014 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2015 }
2016}
2017
2018static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
2019{
2020 if (subs->running) {
2021 unsigned int i;
2022 snd_iprintf(buffer, " Status: Running\n");
2023 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2024 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2025 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2026 for (i = 0; i < subs->nurbs; i++)
2027 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2028 snd_iprintf(buffer, "]\n");
2029 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2030 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2031 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2032 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2033 : get_high_speed_hz(subs->freqm),
2034 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2035 } else {
2036 snd_iprintf(buffer, " Status: Stop\n");
2037 }
2038}
2039
2040static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
2041{
2042 snd_usb_stream_t *stream = entry->private_data;
2043
2044 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2045
2046 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2047 snd_iprintf(buffer, "\nPlayback:\n");
2048 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2049 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2050 }
2051 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2052 snd_iprintf(buffer, "\nCapture:\n");
2053 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2054 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2055 }
2056}
2057
2058static void proc_pcm_format_add(snd_usb_stream_t *stream)
2059{
2060 snd_info_entry_t *entry;
2061 char name[32];
2062 snd_card_t *card = stream->chip->card;
2063
2064 sprintf(name, "stream%d", stream->pcm_index);
2065 if (! snd_card_proc_new(card, name, &entry))
2066 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2067}
2068
2069
2070/*
2071 * initialize the substream instance.
2072 */
2073
2074static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp)
2075{
2076 snd_usb_substream_t *subs = &as->substream[stream];
2077
2078 INIT_LIST_HEAD(&subs->fmt_list);
2079 spin_lock_init(&subs->lock);
7efd8bc8
CL		 2080 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2081 tasklet_init(&subs->start_period_elapsed, start_period_elapsed,
2082 (unsigned long)subs);
1da177e4
LT		 2083
2084 subs->stream = as;
2085 subs->direction = stream;
2086 subs->dev = as->chip->dev;
2087 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2088 subs->ops = audio_urb_ops[stream];
2089 else
2090 subs->ops = audio_urb_ops_high_speed[stream];
1da177e4
LT		 2091 snd_pcm_set_ops(as->pcm, stream,
2092 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2093 &snd_usb_playback_ops : &snd_usb_capture_ops);
2094
2095 list_add_tail(&fp->list, &subs->fmt_list);
2096 subs->formats |= 1ULL << fp->format;
2097 subs->endpoint = fp->endpoint;
2098 subs->num_formats++;
2099 subs->fmt_type = fp->fmt_type;
2100}
2101
2102
2103/*
2104 * free a substream
2105 */
2106static void free_substream(snd_usb_substream_t *subs)
2107{
2108 struct list_head *p, *n;
2109
2110 if (! subs->num_formats)
2111 return; /* not initialized */
2112 list_for_each_safe(p, n, &subs->fmt_list) {
2113 struct audioformat *fp = list_entry(p, struct audioformat, list);
2114 kfree(fp->rate_table);
2115 kfree(fp);
2116 }
2117}
2118
2119
2120/*
2121 * free a usb stream instance
2122 */
2123static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
2124{
2125 free_substream(&stream->substream[0]);
2126 free_substream(&stream->substream[1]);
2127 list_del(&stream->list);
2128 kfree(stream);
2129}
2130
2131static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
2132{
2133 snd_usb_stream_t *stream = pcm->private_data;
2134 if (stream) {
2135 stream->pcm = NULL;
1da177e4
LT		 2136 snd_usb_audio_stream_free(stream);
2137 }
2138}
2139
2140
2141/*
2142 * add this endpoint to the chip instance.
2143 * if a stream with the same endpoint already exists, append to it.
2144 * if not, create a new pcm stream.
2145 */
2146static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp)
2147{
2148 struct list_head *p;
2149 snd_usb_stream_t *as;
2150 snd_usb_substream_t *subs;
2151 snd_pcm_t *pcm;
2152 int err;
2153
2154 list_for_each(p, &chip->pcm_list) {
2155 as = list_entry(p, snd_usb_stream_t, list);
2156 if (as->fmt_type != fp->fmt_type)
2157 continue;
2158 subs = &as->substream[stream];
2159 if (! subs->endpoint)
2160 continue;
2161 if (subs->endpoint == fp->endpoint) {
2162 list_add_tail(&fp->list, &subs->fmt_list);
2163 subs->num_formats++;
2164 subs->formats |= 1ULL << fp->format;
2165 return 0;
2166 }
2167 }
2168 /* look for an empty stream */
2169 list_for_each(p, &chip->pcm_list) {
2170 as = list_entry(p, snd_usb_stream_t, list);
2171 if (as->fmt_type != fp->fmt_type)
2172 continue;
2173 subs = &as->substream[stream];
2174 if (subs->endpoint)
2175 continue;
2176 err = snd_pcm_new_stream(as->pcm, stream, 1);
2177 if (err < 0)
2178 return err;
2179 init_substream(as, stream, fp);
2180 return 0;
2181 }
2182
2183 /* create a new pcm */
2184 as = kmalloc(sizeof(*as), GFP_KERNEL);
2185 if (! as)
2186 return -ENOMEM;
2187 memset(as, 0, sizeof(*as));
2188 as->pcm_index = chip->pcm_devs;
2189 as->chip = chip;
2190 as->fmt_type = fp->fmt_type;
2191 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2192 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2193 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2194 &pcm);
2195 if (err < 0) {
2196 kfree(as);
2197 return err;
2198 }
2199 as->pcm = pcm;
2200 pcm->private_data = as;
2201 pcm->private_free = snd_usb_audio_pcm_free;
2202 pcm->info_flags = 0;
2203 if (chip->pcm_devs > 0)
2204 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2205 else
2206 strcpy(pcm->name, "USB Audio");
2207
2208 init_substream(as, stream, fp);
2209
2210 list_add(&as->list, &chip->pcm_list);
2211 chip->pcm_devs++;
2212
2213 proc_pcm_format_add(as);
2214
2215 return 0;
2216}
2217
2218
2219/*
2220 * check if the device uses big-endian samples
2221 */
27d10f56 2222static int is_big_endian_format(snd_usb_audio_t *chip, struct audioformat *fp)
1da177e4 2223{
27d10f56
CL		 2224 switch (chip->usb_id) {
2225 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2226 if (fp->endpoint & USB_DIR_IN)
1da177e4 2227 return 1;
27d10f56
CL		 2228 break;
2229 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2230 return 1;
1da177e4
LT		 2231 }
2232 return 0;
2233}
2234
2235/*
2236 * parse the audio format type I descriptor
2237 * and returns the corresponding pcm format
2238 *
2239 * @dev: usb device
2240 * @fp: audioformat record
2241 * @format: the format tag (wFormatTag)
2242 * @fmt: the format type descriptor
2243 */
27d10f56 2244static int parse_audio_format_i_type(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2245 int format, unsigned char *fmt)
2246{
2247 int pcm_format;
2248 int sample_width, sample_bytes;
2249
2250 /* FIXME: correct endianess and sign? */
2251 pcm_format = -1;
2252 sample_width = fmt[6];
2253 sample_bytes = fmt[5];
2254 switch (format) {
2255 case 0: /* some devices don't define this correctly... */
2256 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2257 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2258 /* fall-through */
2259 case USB_AUDIO_FORMAT_PCM:
2260 if (sample_width > sample_bytes * 8) {
2261 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2262 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2263 sample_width, sample_bytes);
2264 }
2265 /* check the format byte size */
2266 switch (fmt[5]) {
2267 case 1:
2268 pcm_format = SNDRV_PCM_FORMAT_S8;
2269 break;
2270 case 2:
27d10f56 2271 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2272 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2273 else
2274 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2275 break;
2276 case 3:
27d10f56 2277 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2278 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2279 else
2280 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2281 break;
2282 case 4:
2283 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2284 break;
2285 default:
2286 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2287 chip->dev->devnum, fp->iface,
2288 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2289 break;
2290 }
2291 break;
2292 case USB_AUDIO_FORMAT_PCM8:
2293 /* Dallas DS4201 workaround */
27d10f56 2294 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4
LT		 2295 pcm_format = SNDRV_PCM_FORMAT_S8;
2296 else
2297 pcm_format = SNDRV_PCM_FORMAT_U8;
2298 break;
2299 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2300 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2301 break;
2302 case USB_AUDIO_FORMAT_ALAW:
2303 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2304 break;
2305 case USB_AUDIO_FORMAT_MU_LAW:
2306 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2307 break;
2308 default:
2309 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2310 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2311 break;
2312 }
2313 return pcm_format;
2314}
2315
2316
2317/*
2318 * parse the format descriptor and stores the possible sample rates
2319 * on the audioformat table.
2320 *
2321 * @dev: usb device
2322 * @fp: audioformat record
2323 * @fmt: the format descriptor
2324 * @offset: the start offset of descriptor pointing the rate type
2325 * (7 for type I and II, 8 for type II)
2326 */
27d10f56 2327static int parse_audio_format_rates(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2328 unsigned char *fmt, int offset)
2329{
2330 int nr_rates = fmt[offset];
2331 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2332 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2333 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2334 return -1;
2335 }
2336
2337 if (nr_rates) {
2338 /*
2339 * build the rate table and bitmap flags
2340 */
2341 int r, idx, c;
2342 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2343 static unsigned int conv_rates[] = {
2344 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2345 64000, 88200, 96000, 176400, 192000
2346 };
2347 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2348 if (fp->rate_table == NULL) {
2349 snd_printk(KERN_ERR "cannot malloc\n");
2350 return -1;
2351 }
2352
2353 fp->nr_rates = nr_rates;
2354 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2355 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2356 unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2357 if (rate < fp->rate_min)
2358 fp->rate_min = rate;
2359 else if (rate > fp->rate_max)
2360 fp->rate_max = rate;
2361 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2362 if (rate == conv_rates[c]) {
2363 fp->rates |= (1 << c);
2364 break;
2365 }
2366 }
2367 }
2368 } else {
2369 /* continuous rates */
2370 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2371 fp->rate_min = combine_triple(&fmt[offset + 1]);
2372 fp->rate_max = combine_triple(&fmt[offset + 4]);
2373 }
2374 return 0;
2375}
2376
2377/*
2378 * parse the format type I and III descriptors
2379 */
27d10f56 2380static int parse_audio_format_i(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2381 int format, unsigned char *fmt)
2382{
2383 int pcm_format;
2384
2385 if (fmt[3] == USB_FORMAT_TYPE_III) {
2386 /* FIXME: the format type is really IECxxx
2387 * but we give normal PCM format to get the existing
2388 * apps working...
2389 */
2390 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2391 } else {
27d10f56 2392 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2393 if (pcm_format < 0)
2394 return -1;
2395 }
2396 fp->format = pcm_format;
2397 fp->channels = fmt[4];
2398 if (fp->channels < 1) {
2399 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2400 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2401 return -1;
2402 }
27d10f56 2403 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2404}
2405
2406/*
2407 * prase the format type II descriptor
2408 */
27d10f56 2409static int parse_audio_format_ii(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2410 int format, unsigned char *fmt)
2411{
2412 int brate, framesize;
2413 switch (format) {
2414 case USB_AUDIO_FORMAT_AC3:
2415 /* FIXME: there is no AC3 format defined yet */
2416 // fp->format = SNDRV_PCM_FORMAT_AC3;
2417 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2418 break;
2419 case USB_AUDIO_FORMAT_MPEG:
2420 fp->format = SNDRV_PCM_FORMAT_MPEG;
2421 break;
2422 default:
2423 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
27d10f56 2424 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2425 fp->format = SNDRV_PCM_FORMAT_MPEG;
2426 break;
2427 }
2428 fp->channels = 1;
2429 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2430 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2431 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2432 fp->frame_size = framesize;
27d10f56 2433 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2434}
2435
27d10f56 2436static int parse_audio_format(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2437 int format, unsigned char *fmt, int stream)
2438{
2439 int err;
2440
2441 switch (fmt[3]) {
2442 case USB_FORMAT_TYPE_I:
2443 case USB_FORMAT_TYPE_III:
27d10f56 2444 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2445 break;
2446 case USB_FORMAT_TYPE_II:
27d10f56 2447 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2448 break;
2449 default:
2450 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2451 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2452 return -1;
2453 }
2454 fp->fmt_type = fmt[3];
2455 if (err < 0)
2456 return err;
2457#if 1
8c1872dc 2458 /* FIXME: temporary hack for extigy/audigy 2 nx */
1da177e4
LT		 2459 /* extigy apparently supports sample rates other than 48k
2460 * but not in ordinary way. so we enable only 48k atm.
2461 */
27d10f56
CL		 2462 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2463 chip->usb_id == USB_ID(0x041e, 0x3020)) {
1da177e4 2464 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2465 fp->rates != SNDRV_PCM_RATE_48000 &&
2466 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2467 return -1;
1da177e4
LT		 2468 }
2469#endif
2470 return 0;
2471}
2472
2473static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
2474{
2475 struct usb_device *dev;
2476 struct usb_interface *iface;
2477 struct usb_host_interface *alts;
2478 struct usb_interface_descriptor *altsd;
2479 int i, altno, err, stream;
2480 int format;
2481 struct audioformat *fp;
2482 unsigned char *fmt, *csep;
2483
2484 dev = chip->dev;
2485
2486 /* parse the interface's altsettings */
2487 iface = usb_ifnum_to_if(dev, iface_no);
2488 for (i = 0; i < iface->num_altsetting; i++) {
2489 alts = &iface->altsetting[i];
2490 altsd = get_iface_desc(alts);
2491 /* skip invalid one */
2492 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2493 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2494 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2495 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2496 altsd->bNumEndpoints < 1 ||
2497 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2498 continue;
2499 /* must be isochronous */
2500 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2501 USB_ENDPOINT_XFER_ISOC)
2502 continue;
2503 /* check direction */
2504 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2505 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2506 altno = altsd->bAlternateSetting;
2507
2508 /* get audio formats */
2509 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2510 if (!fmt) {
2511 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2512 dev->devnum, iface_no, altno);
2513 continue;
2514 }
2515
2516 if (fmt[0] < 7) {
2517 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2518 dev->devnum, iface_no, altno);
2519 continue;
2520 }
2521
2522 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2523
2524 /* get format type */
2525 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2526 if (!fmt) {
2527 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2528 dev->devnum, iface_no, altno);
2529 continue;
2530 }
2531 if (fmt[0] < 8) {
2532 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2533 dev->devnum, iface_no, altno);
2534 continue;
2535 }
2536
2537 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2538 /* Creamware Noah has this descriptor after the 2nd endpoint */
2539 if (!csep && altsd->bNumEndpoints >= 2)
2540 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2541 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2542 snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2543 dev->devnum, iface_no, altno);
2544 continue;
2545 }
2546
2547 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2548 if (! fp) {
2549 snd_printk(KERN_ERR "cannot malloc\n");
2550 return -ENOMEM;
2551 }
2552
2553 memset(fp, 0, sizeof(*fp));
2554 fp->iface = iface_no;
2555 fp->altsetting = altno;
2556 fp->altset_idx = i;
2557 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2558 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
1da177e4 2559 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2560 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2561 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2562 * (fp->maxpacksize & 0x7ff);
1da177e4
LT		 2563 fp->attributes = csep[3];
2564
2565 /* some quirks for attributes here */
2566
c3f93297
CL		 2567 switch (chip->usb_id) {
2568 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2569 /* Optoplay sets the sample rate attribute although
2570 * it seems not supporting it in fact.
2571 */
2572 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2573 break;
2574 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2575 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2576 /* doesn't set the sample rate attribute, but supports it */
2577 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2578 break;
2579 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2580 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2581 an older model 77d:223) */
1da177e4
LT		 2582 /*
2583 * plantronics headset and Griffin iMic have set adaptive-in
2584 * although it's really not...
2585 */
1da177e4
LT		 2586 fp->ep_attr &= ~EP_ATTR_MASK;
2587 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2588 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2589 else
2590 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2591 break;
1da177e4
LT		 2592 }
2593
2594 /* ok, let's parse further... */
27d10f56 2595 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2596 kfree(fp->rate_table);
2597 kfree(fp);
2598 continue;
2599 }
2600
2601 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2602 err = add_audio_endpoint(chip, stream, fp);
2603 if (err < 0) {
2604 kfree(fp->rate_table);
2605 kfree(fp);
2606 return err;
2607 }
2608 /* try to set the interface... */
2609 usb_set_interface(chip->dev, iface_no, altno);
2610 init_usb_pitch(chip->dev, iface_no, alts, fp);
2611 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2612 }
2613 return 0;
2614}
2615
2616
2617/*
2618 * disconnect streams
2619 * called from snd_usb_audio_disconnect()
2620 */
ee733397 2621static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2622{
2623 int idx;
2624 snd_usb_stream_t *as;
2625 snd_usb_substream_t *subs;
2626
2627 as = list_entry(head, snd_usb_stream_t, list);
2628 for (idx = 0; idx < 2; idx++) {
2629 subs = &as->substream[idx];
2630 if (!subs->num_formats)
2631 return;
2632 release_substream_urbs(subs, 1);
2633 subs->interface = -1;
2634 }
2635}
2636
2637/*
2638 * parse audio control descriptor and create pcm/midi streams
2639 */
2640static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
2641{
2642 struct usb_device *dev = chip->dev;
2643 struct usb_host_interface *host_iface;
2644 struct usb_interface *iface;
2645 unsigned char *p1;
2646 int i, j;
2647
2648 /* find audiocontrol interface */
2649 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2650 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2651 snd_printk(KERN_ERR "cannot find HEADER\n");
2652 return -EINVAL;
2653 }
2654 if (! p1[7] || p1[0] < 8 + p1[7]) {
2655 snd_printk(KERN_ERR "invalid HEADER\n");
2656 return -EINVAL;
2657 }
2658
2659 /*
2660 * parse all USB audio streaming interfaces
2661 */
2662 for (i = 0; i < p1[7]; i++) {
2663 struct usb_host_interface *alts;
2664 struct usb_interface_descriptor *altsd;
2665 j = p1[8 + i];
2666 iface = usb_ifnum_to_if(dev, j);
2667 if (!iface) {
2668 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2669 dev->devnum, ctrlif, j);
2670 continue;
2671 }
2672 if (usb_interface_claimed(iface)) {
2673 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2674 continue;
2675 }
2676 alts = &iface->altsetting[0];
2677 altsd = get_iface_desc(alts);
2678 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2679 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2680 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2681 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2682 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2683 continue;
2684 }
2685 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2686 continue;
2687 }
2688 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2689 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2690 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2691 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2692 /* skip non-supported classes */
2693 continue;
2694 }
2695 if (! parse_audio_endpoints(chip, j)) {
2696 usb_set_interface(dev, j, 0); /* reset the current interface */
2697 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2698 }
2699 }
2700
2701 return 0;
2702}
2703
2704/*
2705 * create a stream for an endpoint/altsetting without proper descriptors
2706 */
2707static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
2708 struct usb_interface *iface,
2709 const snd_usb_audio_quirk_t *quirk)
2710{
2711 struct audioformat *fp;
2712 struct usb_host_interface *alts;
2713 int stream, err;
2714 int *rate_table = NULL;
2715
2716 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2717 if (! fp) {
2718 snd_printk(KERN_ERR "cannot malloc\n");
2719 return -ENOMEM;
2720 }
2721 memcpy(fp, quirk->data, sizeof(*fp));
2722 if (fp->nr_rates > 0) {
2723 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2724 if (!rate_table) {
2725 kfree(fp);
2726 return -ENOMEM;
2727 }
2728 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2729 fp->rate_table = rate_table;
2730 }
2731
2732 stream = (fp->endpoint & USB_DIR_IN)
2733 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2734 err = add_audio_endpoint(chip, stream, fp);
2735 if (err < 0) {
2736 kfree(fp);
2737 kfree(rate_table);
2738 return err;
2739 }
2740 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2741 fp->altset_idx >= iface->num_altsetting) {
2742 kfree(fp);
2743 kfree(rate_table);
2744 return -EINVAL;
2745 }
2746 alts = &iface->altsetting[fp->altset_idx];
2747 usb_set_interface(chip->dev, fp->iface, 0);
2748 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2749 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2750 return 0;
2751}
2752
2753/*
2754 * create a stream for an interface with proper descriptors
2755 */
2756static int create_standard_interface_quirk(snd_usb_audio_t *chip,
2757 struct usb_interface *iface,
2758 const snd_usb_audio_quirk_t *quirk)
2759{
2760 struct usb_host_interface *alts;
2761 struct usb_interface_descriptor *altsd;
2762 int err;
2763
2764 alts = &iface->altsetting[0];
2765 altsd = get_iface_desc(alts);
2766 switch (quirk->type) {
2767 case QUIRK_AUDIO_STANDARD_INTERFACE:
2768 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
2769 if (!err)
2770 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0); /* reset the current interface */
2771 break;
2772 case QUIRK_MIDI_STANDARD_INTERFACE:
2773 err = snd_usb_create_midi_interface(chip, iface, NULL);
2774 break;
2775 default:
2776 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
2777 return -ENXIO;
2778 }
2779 if (err < 0) {
2780 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2781 altsd->bInterfaceNumber, err);
2782 return err;
2783 }
2784 return 0;
2785}
2786
2787/*
2788 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2789 * to detect the sample rate is by looking at wMaxPacketSize.
2790 */
2791static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
854af957
CL		 2792 struct usb_interface *iface,
2793 const snd_usb_audio_quirk_t *quirk)
1da177e4
LT		 2794{
2795 static const struct audioformat ua_format = {
2796 .format = SNDRV_PCM_FORMAT_S24_3LE,
2797 .channels = 2,
2798 .fmt_type = USB_FORMAT_TYPE_I,
2799 .altsetting = 1,
2800 .altset_idx = 1,
2801 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2802 };
2803 struct usb_host_interface *alts;
2804 struct usb_interface_descriptor *altsd;
2805 struct audioformat *fp;
2806 int stream, err;
2807
2808 /* both PCM and MIDI interfaces have 2 altsettings */
2809 if (iface->num_altsetting != 2)
2810 return -ENXIO;
2811 alts = &iface->altsetting[1];
2812 altsd = get_iface_desc(alts);
2813
2814 if (altsd->bNumEndpoints == 2) {
2815 static const snd_usb_midi_endpoint_info_t ua700_ep = {
2816 .out_cables = 0x0003,
2817 .in_cables = 0x0003
2818 };
2819 static const snd_usb_audio_quirk_t ua700_quirk = {
2820 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2821 .data = &ua700_ep
2822 };
2823 static const snd_usb_midi_endpoint_info_t ua25_ep = {
2824 .out_cables = 0x0001,
2825 .in_cables = 0x0001
2826 };
2827 static const snd_usb_audio_quirk_t ua25_quirk = {
2828 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2829 .data = &ua25_ep
2830 };
27d10f56 2831 if (chip->usb_id == USB_ID(0x0582, 0x002b))
1da177e4
LT		 2832 return snd_usb_create_midi_interface(chip, iface,
2833 &ua700_quirk);
2834 else
2835 return snd_usb_create_midi_interface(chip, iface,
2836 &ua25_quirk);
2837 }
2838
2839 if (altsd->bNumEndpoints != 1)
2840 return -ENXIO;
2841
2842 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2843 if (!fp)
2844 return -ENOMEM;
2845 memcpy(fp, &ua_format, sizeof(*fp));
2846
2847 fp->iface = altsd->bInterfaceNumber;
2848 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2849 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2850 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2851
2852 switch (fp->maxpacksize) {
2853 case 0x120:
2854 fp->rate_max = fp->rate_min = 44100;
2855 break;
2856 case 0x138:
2857 case 0x140:
2858 fp->rate_max = fp->rate_min = 48000;
2859 break;
2860 case 0x258:
2861 case 0x260:
2862 fp->rate_max = fp->rate_min = 96000;
2863 break;
2864 default:
2865 snd_printk(KERN_ERR "unknown sample rate\n");
2866 kfree(fp);
2867 return -ENXIO;
2868 }
2869
2870 stream = (fp->endpoint & USB_DIR_IN)
2871 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2872 err = add_audio_endpoint(chip, stream, fp);
2873 if (err < 0) {
2874 kfree(fp);
2875 return err;
2876 }
2877 usb_set_interface(chip->dev, fp->iface, 0);
2878 return 0;
2879}
2880
2881/*
2882 * Create a stream for an Edirol UA-1000 interface.
2883 */
854af957
CL		 2884static int create_ua1000_quirk(snd_usb_audio_t *chip,
2885 struct usb_interface *iface,
2886 const snd_usb_audio_quirk_t *quirk)
1da177e4
LT		 2887{
2888 static const struct audioformat ua1000_format = {
2889 .format = SNDRV_PCM_FORMAT_S32_LE,
2890 .fmt_type = USB_FORMAT_TYPE_I,
2891 .altsetting = 1,
2892 .altset_idx = 1,
2893 .attributes = 0,
2894 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2895 };
2896 struct usb_host_interface *alts;
2897 struct usb_interface_descriptor *altsd;
2898 struct audioformat *fp;
2899 int stream, err;
2900
2901 if (iface->num_altsetting != 2)
2902 return -ENXIO;
2903 alts = &iface->altsetting[1];
2904 altsd = get_iface_desc(alts);
2905 if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2906 altsd->bNumEndpoints != 1)
2907 return -ENXIO;
2908
2909 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2910 if (!fp)
2911 return -ENOMEM;
2912 memcpy(fp, &ua1000_format, sizeof(*fp));
2913
2914 fp->channels = alts->extra[4];
2915 fp->iface = altsd->bInterfaceNumber;
2916 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2917 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2918 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2919 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2920
2921 stream = (fp->endpoint & USB_DIR_IN)
2922 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2923 err = add_audio_endpoint(chip, stream, fp);
2924 if (err < 0) {
2925 kfree(fp);
2926 return err;
2927 }
2928 /* FIXME: playback must be synchronized to capture */
2929 usb_set_interface(chip->dev, fp->iface, 0);
2930 return 0;
2931}
2932
2933static int snd_usb_create_quirk(snd_usb_audio_t *chip,
2934 struct usb_interface *iface,
2935 const snd_usb_audio_quirk_t *quirk);
2936
2937/*
2938 * handle the quirks for the contained interfaces
2939 */
2940static int create_composite_quirk(snd_usb_audio_t *chip,
2941 struct usb_interface *iface,
2942 const snd_usb_audio_quirk_t *quirk)
2943{
2944 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2945 int err;
2946
2947 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2948 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2949 if (!iface)
2950 continue;
2951 if (quirk->ifnum != probed_ifnum &&
2952 usb_interface_claimed(iface))
2953 continue;
2954 err = snd_usb_create_quirk(chip, iface, quirk);
2955 if (err < 0)
2956 return err;
2957 if (quirk->ifnum != probed_ifnum)
2958 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2959 }
2960 return 0;
2961}
2962
854af957
CL		 2963static int ignore_interface_quirk(snd_usb_audio_t *chip,
2964 struct usb_interface *iface,
2965 const snd_usb_audio_quirk_t *quirk)
2966{
2967 return 0;
2968}
2969
1da177e4
LT		 2970
2971/*
2972 * boot quirks
2973 */
2974
2975#define EXTIGY_FIRMWARE_SIZE_OLD 794
2976#define EXTIGY_FIRMWARE_SIZE_NEW 483
2977
2978static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
2979{
2980 struct usb_host_config *config = dev->actconfig;
2981 int err;
2982
2983 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
2984 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
2985 snd_printdd("sending Extigy boot sequence...\n");
2986 /* Send message to force it to reconnect with full interface. */
2987 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
2988 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
2989 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
2990 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
2991 &dev->descriptor, sizeof(dev->descriptor));
2992 config = dev->actconfig;
2993 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
2994 err = usb_reset_configuration(dev);
2995 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
2996 snd_printdd("extigy_boot: new boot length = %d\n",
2997 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
2998 return -ENODEV; /* quit this anyway */
2999 }
3000 return 0;
3001}
3002
3a2f0856
CL		 3003static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3004{
3a2f0856
CL		 3005 u8 buf = 1;
3006
3007 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3008 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3009 0, 0, &buf, 1, 1000);
3010 if (buf == 0) {
3011 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3012 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3013 1, 2000, NULL, 0, 1000);
3014 return -ENODEV;
3015 }
3a2f0856
CL		 3016 return 0;
3017}
3018
1da177e4
LT		 3019
3020/*
3021 * audio-interface quirks
3022 *
3023 * returns zero if no standard audio/MIDI parsing is needed.
3024 * returns a postive value if standard audio/midi interfaces are parsed
3025 * after this.
3026 * returns a negative value at error.
3027 */
3028static int snd_usb_create_quirk(snd_usb_audio_t *chip,
3029 struct usb_interface *iface,
3030 const snd_usb_audio_quirk_t *quirk)
3031{
854af957
CL		 3032 typedef int (*quirk_func_t)(snd_usb_audio_t *, struct usb_interface *,
3033 const snd_usb_audio_quirk_t *);
3034 static const quirk_func_t quirk_funcs[] = {
3035 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3036 [QUIRK_COMPOSITE] = create_composite_quirk,
3037 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3038 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3039 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3040 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3041 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3042 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3043 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3044 [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface,
3045 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_interface_quirk,
3046 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3047 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3048 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3049 };
3050
3051 if (quirk->type < QUIRK_TYPE_COUNT) {
3052 return quirk_funcs[quirk->type](chip, iface, quirk);
3053 } else {
1da177e4
LT		 3054 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3055 return -ENXIO;
3056 }
3057}
3058
3059
3060/*
3061 * common proc files to show the usb device info
3062 */
3063static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3064{
3065 snd_usb_audio_t *chip = entry->private_data;
3066 if (! chip->shutdown)
3067 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3068}
3069
3070static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3071{
3072 snd_usb_audio_t *chip = entry->private_data;
3073 if (! chip->shutdown)
3074 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3075 USB_ID_VENDOR(chip->usb_id),
3076 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3077}
3078
3079static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
3080{
3081 snd_info_entry_t *entry;
3082 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3083 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3084 if (! snd_card_proc_new(chip->card, "usbid", &entry))
3085 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3086}
3087
3088/*
3089 * free the chip instance
3090 *
3091 * here we have to do not much, since pcm and controls are already freed
3092 *
3093 */
3094
3095static int snd_usb_audio_free(snd_usb_audio_t *chip)
3096{
3097 kfree(chip);
3098 return 0;
3099}
3100
3101static int snd_usb_audio_dev_free(snd_device_t *device)
3102{
3103 snd_usb_audio_t *chip = device->device_data;
3104 return snd_usb_audio_free(chip);
3105}
3106
3107
3108/*
3109 * create a chip instance and set its names.
3110 */
3111static int snd_usb_audio_create(struct usb_device *dev, int idx,
3112 const snd_usb_audio_quirk_t *quirk,
3113 snd_usb_audio_t **rchip)
3114{
3115 snd_card_t *card;
3116 snd_usb_audio_t *chip;
3117 int err, len;
3118 char component[14];
3119 static snd_device_ops_t ops = {
3120 .dev_free = snd_usb_audio_dev_free,
3121 };
3122
3123 *rchip = NULL;
3124
3125 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3126 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3127 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3128 return -ENXIO;
3129 }
3130
3131 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3132 if (card == NULL) {
3133 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3134 return -ENOMEM;
3135 }
3136
3137 chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
3138 if (! chip) {
3139 snd_card_free(card);
3140 return -ENOMEM;
3141 }
3142
3143 chip->index = idx;
3144 chip->dev = dev;
3145 chip->card = card;
27d10f56
CL		 3146 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3147 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3148 INIT_LIST_HEAD(&chip->pcm_list);
3149 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3150 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3151
3152 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3153 snd_usb_audio_free(chip);
3154 snd_card_free(card);
3155 return err;
3156 }
3157
3158 strcpy(card->driver, "USB-Audio");
3159 sprintf(component, "USB%04x:%04x",
27d10f56 3160 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3161 snd_component_add(card, component);
3162
3163 /* retrieve the device string as shortname */
3164 if (quirk && quirk->product_name) {
3165 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3166 } else {
3167 if (!dev->descriptor.iProduct ||
3168 usb_string(dev, dev->descriptor.iProduct,
3169 card->shortname, sizeof(card->shortname)) <= 0) {
3170 /* no name available from anywhere, so use ID */
3171 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3172 USB_ID_VENDOR(chip->usb_id),
3173 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3174 }
3175 }
3176
3177 /* retrieve the vendor and device strings as longname */
3178 if (quirk && quirk->vendor_name) {
3179 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3180 } else {
3181 if (dev->descriptor.iManufacturer)
3182 len = usb_string(dev, dev->descriptor.iManufacturer,
3183 card->longname, sizeof(card->longname));
3184 else
3185 len = 0;
3186 /* we don't really care if there isn't any vendor string */
3187 }
3188 if (len > 0)
3189 strlcat(card->longname, " ", sizeof(card->longname));
3190
3191 strlcat(card->longname, card->shortname, sizeof(card->longname));
3192
3193 len = strlcat(card->longname, " at ", sizeof(card->longname));
3194
3195 if (len < sizeof(card->longname))
3196 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3197
3198 strlcat(card->longname,
3199 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3200 sizeof(card->longname));
3201
3202 snd_usb_audio_create_proc(chip);
3203
1da177e4
LT		 3204 *rchip = chip;
3205 return 0;
3206}
3207
3208
3209/*
3210 * probe the active usb device
3211 *
3212 * note that this can be called multiple times per a device, when it
3213 * includes multiple audio control interfaces.
3214 *
3215 * thus we check the usb device pointer and creates the card instance
3216 * only at the first time. the successive calls of this function will
3217 * append the pcm interface to the corresponding card.
3218 */
3219static void *snd_usb_audio_probe(struct usb_device *dev,
3220 struct usb_interface *intf,
3221 const struct usb_device_id *usb_id)
3222{
3223 struct usb_host_config *config = dev->actconfig;
3224 const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info;
3225 int i, err;
3226 snd_usb_audio_t *chip;
3227 struct usb_host_interface *alts;
3228 int ifnum;
27d10f56 3229 u32 id;
1da177e4
LT		 3230
3231 alts = &intf->altsetting[0];
3232 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3233 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3234 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3235
3236 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3237 goto __err_val;
3238
3239 /* SB Extigy needs special boot-up sequence */
3240 /* if more models come, this will go to the quirk list. */
27d10f56 3241 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3242 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3243 goto __err_val;
3244 config = dev->actconfig;
3245 }
3a2f0856
CL		 3246 /* SB Audigy 2 NX needs its own boot-up magic, too */
3247 if (id == USB_ID(0x041e, 0x3020)) {
3248 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3249 goto __err_val;
3250 }
1da177e4
LT		 3251
3252 /*
3253 * found a config. now register to ALSA
3254 */
3255
3256 /* check whether it's already registered */
3257 chip = NULL;
3258 down(&register_mutex);
3259 for (i = 0; i < SNDRV_CARDS; i++) {
3260 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3261 if (usb_chip[i]->shutdown) {
3262 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3263 goto __error;
3264 }
3265 chip = usb_chip[i];
3266 break;
3267 }
3268 }
3269 if (! chip) {
3270 /* it's a fresh one.
3271 * now look for an empty slot and create a new card instance
3272 */
3273 /* first, set the current configuration for this device */
3274 if (usb_reset_configuration(dev) < 0) {
3275 snd_printk(KERN_ERR "cannot reset configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue);
3276 goto __error;
3277 }
3278 for (i = 0; i < SNDRV_CARDS; i++)
3279 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3280 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3281 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3282 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3283 goto __error;
3284 }
1dcd3ec4 3285 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3286 break;
3287 }
3288 if (! chip) {
3289 snd_printk(KERN_ERR "no available usb audio device\n");
3290 goto __error;
3291 }
3292 }
3293
3294 err = 1; /* continue */
3295 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3296 /* need some special handlings */
3297 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3298 goto __error;
3299 }
3300
3301 if (err > 0) {
3302 /* create normal USB audio interfaces */
3303 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3304 snd_usb_create_mixer(chip, ifnum) < 0) {
3305 goto __error;
3306 }
3307 }
3308
3309 /* we are allowed to call snd_card_register() many times */
3310 if (snd_card_register(chip->card) < 0) {
3311 goto __error;
3312 }
3313
3314 usb_chip[chip->index] = chip;
3315 chip->num_interfaces++;
3316 up(&register_mutex);
3317 return chip;
3318
3319 __error:
3320 if (chip && !chip->num_interfaces)
3321 snd_card_free(chip->card);
3322 up(&register_mutex);
3323 __err_val:
3324 return NULL;
3325}
3326
3327/*
3328 * we need to take care of counter, since disconnection can be called also
3329 * many times as well as usb_audio_probe().
3330 */
3331static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3332{
3333 snd_usb_audio_t *chip;
3334 snd_card_t *card;
3335 struct list_head *p;
3336
3337 if (ptr == (void *)-1L)
3338 return;
3339
3340 chip = ptr;
3341 card = chip->card;
3342 down(&register_mutex);
3343 chip->shutdown = 1;
3344 chip->num_interfaces--;
3345 if (chip->num_interfaces <= 0) {
3346 snd_card_disconnect(card);
3347 /* release the pcm resources */
3348 list_for_each(p, &chip->pcm_list) {
ee733397 3349 snd_usb_stream_disconnect(p);
1da177e4
LT		 3350 }
3351 /* release the midi resources */
3352 list_for_each(p, &chip->midi_list) {
ee733397 3353 snd_usbmidi_disconnect(p);
1da177e4 3354 }
84957a8a
CL		 3355 /* release mixer resources */
3356 list_for_each(p, &chip->mixer_list) {
3357 snd_usb_mixer_disconnect(p);
3358 }
1da177e4
LT		 3359 usb_chip[chip->index] = NULL;
3360 up(&register_mutex);
230cd5e2 3361 snd_card_free(card);
1da177e4
LT		 3362 } else {
3363 up(&register_mutex);
3364 }
3365}
3366
3367/*
3368 * new 2.5 USB kernel API
3369 */
3370static int usb_audio_probe(struct usb_interface *intf,
3371 const struct usb_device_id *id)
3372{
3373 void *chip;
3374 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3375 if (chip) {
3376 dev_set_drvdata(&intf->dev, chip);
3377 return 0;
3378 } else
3379 return -EIO;
3380}
3381
3382static void usb_audio_disconnect(struct usb_interface *intf)
3383{
3384 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3385 dev_get_drvdata(&intf->dev));
3386}
3387
3388
3389static int __init snd_usb_audio_init(void)
3390{
3391 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3392 printk(KERN_WARNING "invalid nrpacks value.\n");
3393 return -EINVAL;
3394 }
3395 usb_register(&usb_audio_driver);
3396 return 0;
3397}
3398
3399
3400static void __exit snd_usb_audio_cleanup(void)
3401{
3402 usb_deregister(&usb_audio_driver);
3403}
3404
3405module_init(snd_usb_audio_init);
3406module_exit(snd_usb_audio_cleanup);
Linux kernel - Deliverables
This page took 0.239911 seconds and 5 git commands to generate.