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Merge branch 'avr32-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemo...
[deliverable/linux.git] / sound / usb / usbaudio.c
CommitLineData
1da177e4
LT		 1/*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Main and PCM part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 *
28 * NOTES:
29 *
30 * - async unlink should be used for avoiding the sleep inside lock.
31 * 2.4.22 usb-uhci seems buggy for async unlinking and results in
32 * oops. in such a cse, pass async_unlink=0 option.
33 * - the linked URBs would be preferred but not used so far because of
34 * the instability of unlinking.
35 * - type II is not supported properly. there is no device which supports
36 * this type *correctly*. SB extigy looks as if it supports, but it's
37 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
38 */
39
40
1da177e4
LT		 41#include <linux/bitops.h>
42#include <linux/init.h>
43#include <linux/list.h>
44#include <linux/slab.h>
45#include <linux/string.h>
46#include <linux/usb.h>
6207e51b 47#include <linux/vmalloc.h>
1da177e4 48#include <linux/moduleparam.h>
12aa7579 49#include <linux/mutex.h>
1da177e4
LT		 50#include <sound/core.h>
51#include <sound/info.h>
52#include <sound/pcm.h>
53#include <sound/pcm_params.h>
54#include <sound/initval.h>
55
56#include "usbaudio.h"
57
58
59MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
60MODULE_DESCRIPTION("USB Audio");
61MODULE_LICENSE("GPL");
62MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
63
64
65static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
66static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
67static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
68static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
69static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
92b9ac78 70static int nrpacks = 8; /* max. number of packets per urb */
1da177e4 71static int async_unlink = 1;
e311334e 72static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
1da177e4
LT		 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.");
e311334e
TLM		 88module_param_array(device_setup, int, NULL, 0444);
89MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
1da177e4
LT		 90
91
92/*
93 * debug the h/w constraints
94 */
95/* #define HW_CONST_DEBUG */
96
97
98/*
99 *
100 */
101
92b9ac78 102#define MAX_PACKS 20
1da177e4 103#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
15a24c07 104#define MAX_URBS 8
604cf499 105#define SYNC_URBS 4 /* always four urbs for sync */
1da177e4
LT		 106#define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
107
1da177e4
LT		 108struct audioformat {
109 struct list_head list;
110 snd_pcm_format_t format; /* format type */
111 unsigned int channels; /* # channels */
112 unsigned int fmt_type; /* USB audio format type (1-3) */
113 unsigned int frame_size; /* samples per frame for non-audio */
114 int iface; /* interface number */
115 unsigned char altsetting; /* corresponding alternate setting */
116 unsigned char altset_idx; /* array index of altenate setting */
117 unsigned char attributes; /* corresponding attributes of cs endpoint */
118 unsigned char endpoint; /* endpoint */
119 unsigned char ep_attr; /* endpoint attributes */
120 unsigned int maxpacksize; /* max. packet size */
121 unsigned int rates; /* rate bitmasks */
122 unsigned int rate_min, rate_max; /* min/max rates */
123 unsigned int nr_rates; /* number of rate table entries */
124 unsigned int *rate_table; /* rate table */
125};
126
86e07d34
TI		 127struct snd_usb_substream;
128
1da177e4
LT		 129struct snd_urb_ctx {
130 struct urb *urb;
55851f73 131 unsigned int buffer_size; /* size of data buffer, if data URB */
86e07d34 132 struct snd_usb_substream *subs;
1da177e4
LT		 133 int index; /* index for urb array */
134 int packets; /* number of packets per urb */
1da177e4
LT		 135};
136
137struct snd_urb_ops {
86e07d34
TI		 138 int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
139 int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
140 int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
141 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
1da177e4
LT		 142};
143
144struct snd_usb_substream {
86e07d34 145 struct snd_usb_stream *stream;
1da177e4 146 struct usb_device *dev;
86e07d34 147 struct snd_pcm_substream *pcm_substream;
1da177e4
LT		 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 */
86e07d34
TI		 179 struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
180 struct snd_urb_ctx 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 */
8fec560d 187 struct snd_pcm_hw_constraint_list rate_list; /* limited rates */
1da177e4
LT		 188 spinlock_t lock;
189
190 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
191};
192
193
194struct snd_usb_stream {
86e07d34
TI		 195 struct snd_usb_audio *chip;
196 struct snd_pcm *pcm;
1da177e4
LT		 197 int pcm_index;
198 unsigned int fmt_type; /* USB audio format type (1-3) */
86e07d34 199 struct snd_usb_substream substream[2];
1da177e4
LT		 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
12aa7579 209static DEFINE_MUTEX(register_mutex);
86e07d34 210static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
1da177e4
LT		 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 */
86e07d34
TI		 250static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
251 struct snd_pcm_runtime *runtime,
1da177e4
LT		 252 struct urb *urb)
253{
254 unsigned char *cp = urb->transfer_buffer;
88518275 255 struct snd_urb_ctx *ctx = 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 */
86e07d34
TI		 272static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
273 struct snd_pcm_runtime *runtime,
1da177e4
LT		 274 struct urb *urb)
275{
276 unsigned char *cp = urb->transfer_buffer;
88518275 277 struct snd_urb_ctx *ctx = 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 */
86e07d34
TI		 293static int retire_capture_sync_urb(struct snd_usb_substream *subs,
294 struct snd_pcm_runtime *runtime,
1da177e4
LT		 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 */
86e07d34
TI		 310static int prepare_capture_urb(struct snd_usb_substream *subs,
311 struct snd_pcm_runtime *runtime,
1da177e4
LT		 312 struct urb *urb)
313{
314 int i, offs;
88518275 315 struct snd_urb_ctx *ctx = urb->context;
1da177e4
LT		 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 return 0;
327}
328
329/*
330 * process after capture complete
331 *
332 * copy the data from each desctiptor to the pcm buffer, and
333 * update the current position.
334 */
86e07d34
TI		 335static int retire_capture_urb(struct snd_usb_substream *subs,
336 struct snd_pcm_runtime *runtime,
1da177e4
LT		 337 struct urb *urb)
338{
339 unsigned long flags;
340 unsigned char *cp;
341 int i;
342 unsigned int stride, len, oldptr;
b263a9bd 343 int period_elapsed = 0;
1da177e4
LT		 344
345 stride = runtime->frame_bits >> 3;
346
347 for (i = 0; i < urb->number_of_packets; i++) {
348 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
349 if (urb->iso_frame_desc[i].status) {
350 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
351 // continue;
352 }
353 len = urb->iso_frame_desc[i].actual_length / stride;
354 if (! len)
355 continue;
356 /* update the current pointer */
357 spin_lock_irqsave(&subs->lock, flags);
358 oldptr = subs->hwptr_done;
359 subs->hwptr_done += len;
360 if (subs->hwptr_done >= runtime->buffer_size)
361 subs->hwptr_done -= runtime->buffer_size;
362 subs->transfer_done += len;
b263a9bd
CL		 363 if (subs->transfer_done >= runtime->period_size) {
364 subs->transfer_done -= runtime->period_size;
365 period_elapsed = 1;
366 }
1da177e4
LT		 367 spin_unlock_irqrestore(&subs->lock, flags);
368 /* copy a data chunk */
369 if (oldptr + len > runtime->buffer_size) {
370 unsigned int cnt = runtime->buffer_size - oldptr;
371 unsigned int blen = cnt * stride;
372 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
373 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
374 } else {
375 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
376 }
1da177e4 377 }
b263a9bd
CL		 378 if (period_elapsed)
379 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 380 return 0;
381}
382
e4f8e656
CL		 383/*
384 * Process after capture complete when paused. Nothing to do.
385 */
386static int retire_paused_capture_urb(struct snd_usb_substream *subs,
387 struct snd_pcm_runtime *runtime,
388 struct urb *urb)
389{
390 return 0;
391}
392
1da177e4
LT		 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
86e07d34
TI		 400static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
401 struct snd_pcm_runtime *runtime,
1da177e4
LT		 402 struct urb *urb)
403{
88518275 404 struct snd_urb_ctx *ctx = urb->context;
1da177e4 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
86e07d34
TI		 418static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
419 struct snd_pcm_runtime *runtime,
1da177e4
LT		 420 struct urb *urb)
421{
88518275 422 struct snd_urb_ctx *ctx = urb->context;
1da177e4 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 */
86e07d34
TI		 436static int retire_playback_sync_urb(struct snd_usb_substream *subs,
437 struct snd_pcm_runtime *runtime,
1da177e4
LT		 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 */
86e07d34
TI		 462static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
463 struct snd_pcm_runtime *runtime,
1da177e4
LT		 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
d513202e
CL		 482/*
483 * process after E-Mu 0202/0404 high speed playback sync complete
484 *
485 * These devices return the number of samples per packet instead of the number
486 * of samples per microframe.
487 */
488static int retire_playback_sync_urb_hs_emu(struct snd_usb_substream *subs,
489 struct snd_pcm_runtime *runtime,
490 struct urb *urb)
491{
492 unsigned int f;
493 unsigned long flags;
494
495 if (urb->iso_frame_desc[0].status == 0 &&
496 urb->iso_frame_desc[0].actual_length == 4) {
497 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
498 f >>= subs->datainterval;
499 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
500 spin_lock_irqsave(&subs->lock, flags);
501 subs->freqm = f;
502 spin_unlock_irqrestore(&subs->lock, flags);
503 }
504 }
505
506 return 0;
507}
508
9568f461
CL		 509/* determine the number of frames in the next packet */
510static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
511{
512 if (subs->fill_max)
513 return subs->maxframesize;
514 else {
515 subs->phase = (subs->phase & 0xffff)
516 + (subs->freqm << subs->datainterval);
517 return min(subs->phase >> 16, subs->maxframesize);
518 }
519}
520
b55bbf06 521/*
e4f8e656 522 * Prepare urb for streaming before playback starts or when paused.
b55bbf06 523 *
e4f8e656 524 * We don't have any data, so we send a frame of silence.
b55bbf06 525 */
e4f8e656
CL		 526static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
527 struct snd_pcm_runtime *runtime,
528 struct urb *urb)
b55bbf06 529{
4b284928 530 unsigned int i, offs, counts;
86e07d34 531 struct snd_urb_ctx *ctx = urb->context;
4b284928 532 int stride = runtime->frame_bits >> 3;
b55bbf06 533
4b284928 534 offs = 0;
b55bbf06
CL		 535 urb->dev = ctx->subs->dev;
536 urb->number_of_packets = subs->packs_per_ms;
537 for (i = 0; i < subs->packs_per_ms; ++i) {
9568f461 538 counts = snd_usb_audio_next_packet_size(subs);
4b284928
CL		 539 urb->iso_frame_desc[i].offset = offs * stride;
540 urb->iso_frame_desc[i].length = counts * stride;
541 offs += counts;
b55bbf06 542 }
4b284928
CL		 543 urb->transfer_buffer_length = offs * stride;
544 memset(urb->transfer_buffer,
545 subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
546 offs * stride);
b55bbf06
CL		 547 return 0;
548}
549
1da177e4
LT		 550/*
551 * prepare urb for playback data pipe
552 *
7efd8bc8
CL		 553 * Since a URB can handle only a single linear buffer, we must use double
554 * buffering when the data to be transferred overflows the buffer boundary.
555 * To avoid inconsistencies when updating hwptr_done, we use double buffering
556 * for all URBs.
1da177e4 557 */
86e07d34
TI		 558static int prepare_playback_urb(struct snd_usb_substream *subs,
559 struct snd_pcm_runtime *runtime,
1da177e4
LT		 560 struct urb *urb)
561{
562 int i, stride, offs;
563 unsigned int counts;
564 unsigned long flags;
7efd8bc8 565 int period_elapsed = 0;
88518275 566 struct snd_urb_ctx *ctx = urb->context;
1da177e4
LT		 567
568 stride = runtime->frame_bits >> 3;
569
570 offs = 0;
571 urb->dev = ctx->subs->dev; /* we need to set this at each time */
572 urb->number_of_packets = 0;
573 spin_lock_irqsave(&subs->lock, flags);
574 for (i = 0; i < ctx->packets; i++) {
9568f461 575 counts = snd_usb_audio_next_packet_size(subs);
1da177e4
LT		 576 /* set up descriptor */
577 urb->iso_frame_desc[i].offset = offs * stride;
578 urb->iso_frame_desc[i].length = counts * stride;
579 offs += counts;
580 urb->number_of_packets++;
7efd8bc8
CL		 581 subs->transfer_done += counts;
582 if (subs->transfer_done >= runtime->period_size) {
583 subs->transfer_done -= runtime->period_size;
584 period_elapsed = 1;
1da177e4 585 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
7efd8bc8
CL		 586 if (subs->transfer_done > 0) {
587 /* FIXME: fill-max mode is not
588 * supported yet */
589 offs -= subs->transfer_done;
590 counts -= subs->transfer_done;
591 urb->iso_frame_desc[i].length =
592 counts * stride;
593 subs->transfer_done = 0;
1da177e4
LT		 594 }
595 i++;
596 if (i < ctx->packets) {
597 /* add a transfer delimiter */
7efd8bc8
CL		 598 urb->iso_frame_desc[i].offset =
599 offs * stride;
1da177e4
LT		 600 urb->iso_frame_desc[i].length = 0;
601 urb->number_of_packets++;
602 }
9624ea81 603 break;
1da177e4 604 }
1da177e4 605 }
9624ea81
CL		 606 /* finish at the frame boundary at/after the period boundary */
607 if (period_elapsed &&
608 (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
609 break;
1da177e4 610 }
7efd8bc8
CL		 611 if (subs->hwptr_done + offs > runtime->buffer_size) {
612 /* err, the transferred area goes over buffer boundary. */
613 unsigned int len = runtime->buffer_size - subs->hwptr_done;
614 memcpy(urb->transfer_buffer,
615 runtime->dma_area + subs->hwptr_done * stride,
616 len * stride);
617 memcpy(urb->transfer_buffer + len * stride,
618 runtime->dma_area,
619 (offs - len) * stride);
1da177e4 620 } else {
7efd8bc8
CL		 621 memcpy(urb->transfer_buffer,
622 runtime->dma_area + subs->hwptr_done * stride,
623 offs * stride);
1da177e4 624 }
7efd8bc8
CL		 625 subs->hwptr_done += offs;
626 if (subs->hwptr_done >= runtime->buffer_size)
627 subs->hwptr_done -= runtime->buffer_size;
1da177e4
LT		 628 spin_unlock_irqrestore(&subs->lock, flags);
629 urb->transfer_buffer_length = offs * stride;
b55bbf06
CL		 630 if (period_elapsed)
631 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 632 return 0;
633}
634
635/*
636 * process after playback data complete
7efd8bc8 637 * - nothing to do
1da177e4 638 */
86e07d34
TI		 639static int retire_playback_urb(struct snd_usb_substream *subs,
640 struct snd_pcm_runtime *runtime,
1da177e4
LT		 641 struct urb *urb)
642{
1da177e4
LT		 643 return 0;
644}
645
646
647/*
648 */
649static struct snd_urb_ops audio_urb_ops[2] = {
650 {
e4f8e656 651 .prepare = prepare_nodata_playback_urb,
1da177e4
LT		 652 .retire = retire_playback_urb,
653 .prepare_sync = prepare_playback_sync_urb,
654 .retire_sync = retire_playback_sync_urb,
655 },
656 {
657 .prepare = prepare_capture_urb,
658 .retire = retire_capture_urb,
659 .prepare_sync = prepare_capture_sync_urb,
660 .retire_sync = retire_capture_sync_urb,
661 },
662};
663
664static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
665 {
e4f8e656 666 .prepare = prepare_nodata_playback_urb,
1da177e4
LT		 667 .retire = retire_playback_urb,
668 .prepare_sync = prepare_playback_sync_urb_hs,
669 .retire_sync = retire_playback_sync_urb_hs,
670 },
671 {
672 .prepare = prepare_capture_urb,
673 .retire = retire_capture_urb,
674 .prepare_sync = prepare_capture_sync_urb_hs,
675 .retire_sync = retire_capture_sync_urb,
676 },
677};
678
679/*
680 * complete callback from data urb
681 */
7d12e780 682static void snd_complete_urb(struct urb *urb)
1da177e4 683{
88518275 684 struct snd_urb_ctx *ctx = urb->context;
86e07d34
TI		 685 struct snd_usb_substream *subs = ctx->subs;
686 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 687 int err = 0;
688
689 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
690 ! subs->running || /* can be stopped during retire callback */
691 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
692 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
693 clear_bit(ctx->index, &subs->active_mask);
694 if (err < 0) {
695 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
696 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
697 }
698 }
699}
700
701
702/*
703 * complete callback from sync urb
704 */
7d12e780 705static void snd_complete_sync_urb(struct urb *urb)
1da177e4 706{
88518275 707 struct snd_urb_ctx *ctx = urb->context;
86e07d34
TI		 708 struct snd_usb_substream *subs = ctx->subs;
709 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 710 int err = 0;
711
712 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
713 ! subs->running || /* can be stopped during retire callback */
714 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
715 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
716 clear_bit(ctx->index + 16, &subs->active_mask);
717 if (err < 0) {
718 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
719 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
720 }
721 }
722}
723
724
6207e51b 725/* get the physical page pointer at the given offset */
86e07d34 726static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
6207e51b
CL		 727 unsigned long offset)
728{
729 void *pageptr = subs->runtime->dma_area + offset;
730 return vmalloc_to_page(pageptr);
731}
732
733/* allocate virtual buffer; may be called more than once */
86e07d34 734static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
6207e51b 735{
86e07d34 736 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b
CL		 737 if (runtime->dma_area) {
738 if (runtime->dma_bytes >= size)
739 return 0; /* already large enough */
b1d5776d 740 vfree(runtime->dma_area);
6207e51b 741 }
b1d5776d 742 runtime->dma_area = vmalloc(size);
6207e51b
CL		 743 if (! runtime->dma_area)
744 return -ENOMEM;
745 runtime->dma_bytes = size;
746 return 0;
747}
748
749/* free virtual buffer; may be called more than once */
86e07d34 750static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
6207e51b 751{
86e07d34 752 struct snd_pcm_runtime *runtime = subs->runtime;
9c4be3d3
JJ		 753
754 vfree(runtime->dma_area);
755 runtime->dma_area = NULL;
6207e51b
CL		 756 return 0;
757}
758
759
1da177e4
LT		 760/*
761 * unlink active urbs.
762 */
86e07d34 763static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
1da177e4
LT		 764{
765 unsigned int i;
766 int async;
767
768 subs->running = 0;
769
770 if (!force && subs->stream->chip->shutdown) /* to be sure... */
771 return -EBADFD;
772
773 async = !can_sleep && async_unlink;
774
775 if (! async && in_interrupt())
776 return 0;
777
778 for (i = 0; i < subs->nurbs; i++) {
779 if (test_bit(i, &subs->active_mask)) {
780 if (! test_and_set_bit(i, &subs->unlink_mask)) {
781 struct urb *u = subs->dataurb[i].urb;
b375a049 782 if (async)
1da177e4 783 usb_unlink_urb(u);
b375a049 784 else
1da177e4
LT		 785 usb_kill_urb(u);
786 }
787 }
788 }
789 if (subs->syncpipe) {
790 for (i = 0; i < SYNC_URBS; i++) {
791 if (test_bit(i+16, &subs->active_mask)) {
792 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
793 struct urb *u = subs->syncurb[i].urb;
b375a049 794 if (async)
1da177e4 795 usb_unlink_urb(u);
b375a049 796 else
1da177e4
LT		 797 usb_kill_urb(u);
798 }
799 }
800 }
801 }
802 return 0;
803}
804
805
32e19e88
CL		 806static const char *usb_error_string(int err)
807{
808 switch (err) {
809 case -ENODEV:
810 return "no device";
811 case -ENOENT:
812 return "endpoint not enabled";
813 case -EPIPE:
814 return "endpoint stalled";
815 case -ENOSPC:
816 return "not enough bandwidth";
817 case -ESHUTDOWN:
818 return "device disabled";
819 case -EHOSTUNREACH:
820 return "device suspended";
3e964432
CL		 821#ifndef CONFIG_USB_EHCI_SPLIT_ISO
822 case -ENOSYS:
823 return "enable CONFIG_USB_EHCI_SPLIT_ISO to play through a hub";
824#endif
32e19e88
CL		 825 case -EINVAL:
826 case -EAGAIN:
827 case -EFBIG:
828 case -EMSGSIZE:
829 return "internal error";
830 default:
831 return "unknown error";
832 }
833}
834
1da177e4
LT		 835/*
836 * set up and start data/sync urbs
837 */
86e07d34 838static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
1da177e4
LT		 839{
840 unsigned int i;
841 int err;
842
843 if (subs->stream->chip->shutdown)
844 return -EBADFD;
845
846 for (i = 0; i < subs->nurbs; i++) {
847 snd_assert(subs->dataurb[i].urb, return -EINVAL);
848 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
849 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
850 goto __error;
851 }
852 }
853 if (subs->syncpipe) {
854 for (i = 0; i < SYNC_URBS; i++) {
855 snd_assert(subs->syncurb[i].urb, return -EINVAL);
856 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
857 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
858 goto __error;
859 }
860 }
861 }
862
863 subs->active_mask = 0;
864 subs->unlink_mask = 0;
865 subs->running = 1;
866 for (i = 0; i < subs->nurbs; i++) {
32e19e88
CL		 867 err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC);
868 if (err < 0) {
869 snd_printk(KERN_ERR "cannot submit datapipe "
870 "for urb %d, error %d: %s\n",
871 i, err, usb_error_string(err));
1da177e4
LT		 872 goto __error;
873 }
874 set_bit(i, &subs->active_mask);
875 }
876 if (subs->syncpipe) {
877 for (i = 0; i < SYNC_URBS; i++) {
32e19e88
CL		 878 err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC);
879 if (err < 0) {
880 snd_printk(KERN_ERR "cannot submit syncpipe "
881 "for urb %d, error %d: %s\n",
882 i, err, usb_error_string(err));
1da177e4
LT		 883 goto __error;
884 }
885 set_bit(i + 16, &subs->active_mask);
886 }
887 }
888 return 0;
889
890 __error:
891 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
892 deactivate_urbs(subs, 0, 0);
893 return -EPIPE;
894}
895
896
897/*
898 * wait until all urbs are processed.
899 */
86e07d34 900static int wait_clear_urbs(struct snd_usb_substream *subs)
1da177e4 901{
b27c187f 902 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 903 unsigned int i;
904 int alive;
905
906 do {
907 alive = 0;
908 for (i = 0; i < subs->nurbs; i++) {
909 if (test_bit(i, &subs->active_mask))
910 alive++;
911 }
912 if (subs->syncpipe) {
913 for (i = 0; i < SYNC_URBS; i++) {
914 if (test_bit(i + 16, &subs->active_mask))
915 alive++;
916 }
917 }
918 if (! alive)
919 break;
8433a509 920 schedule_timeout_uninterruptible(1);
b27c187f 921 } while (time_before(jiffies, end_time));
1da177e4
LT		 922 if (alive)
923 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
924 return 0;
925}
926
927
928/*
929 * return the current pcm pointer. just return the hwptr_done value.
930 */
86e07d34 931static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 932{
86e07d34 933 struct snd_usb_substream *subs;
daa150ef
CL		 934 snd_pcm_uframes_t hwptr_done;
935
86e07d34 936 subs = (struct snd_usb_substream *)substream->runtime->private_data;
daa150ef
CL		 937 spin_lock(&subs->lock);
938 hwptr_done = subs->hwptr_done;
939 spin_unlock(&subs->lock);
940 return hwptr_done;
1da177e4
LT		 941}
942
943
944/*
b55bbf06 945 * start/stop playback substream
1da177e4 946 */
86e07d34 947static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
b55bbf06 948 int cmd)
1da177e4 949{
86e07d34 950 struct snd_usb_substream *subs = substream->runtime->private_data;
b55bbf06
CL		 951
952 switch (cmd) {
953 case SNDRV_PCM_TRIGGER_START:
e4f8e656 954 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
b55bbf06
CL		 955 subs->ops.prepare = prepare_playback_urb;
956 return 0;
957 case SNDRV_PCM_TRIGGER_STOP:
958 return deactivate_urbs(subs, 0, 0);
e4f8e656
CL		 959 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
960 subs->ops.prepare = prepare_nodata_playback_urb;
961 return 0;
b55bbf06
CL		 962 default:
963 return -EINVAL;
964 }
965}
966
967/*
968 * start/stop capture substream
969 */
86e07d34 970static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
b55bbf06
CL		 971 int cmd)
972{
86e07d34 973 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 974
975 switch (cmd) {
976 case SNDRV_PCM_TRIGGER_START:
e4f8e656 977 subs->ops.retire = retire_capture_urb;
b55bbf06 978 return start_urbs(subs, substream->runtime);
1da177e4 979 case SNDRV_PCM_TRIGGER_STOP:
b55bbf06 980 return deactivate_urbs(subs, 0, 0);
e4f8e656
CL		 981 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
982 subs->ops.retire = retire_paused_capture_urb;
983 return 0;
984 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
985 subs->ops.retire = retire_capture_urb;
986 return 0;
1da177e4 987 default:
b55bbf06 988 return -EINVAL;
1da177e4 989 }
1da177e4
LT		 990}
991
992
993/*
994 * release a urb data
995 */
86e07d34 996static void release_urb_ctx(struct snd_urb_ctx *u)
1da177e4
LT		 997{
998 if (u->urb) {
55851f73
CL		 999 if (u->buffer_size)
1000 usb_buffer_free(u->subs->dev, u->buffer_size,
1001 u->urb->transfer_buffer,
1002 u->urb->transfer_dma);
1da177e4
LT		 1003 usb_free_urb(u->urb);
1004 u->urb = NULL;
1005 }
1da177e4
LT		 1006}
1007
1008/*
1009 * release a substream
1010 */
86e07d34 1011static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1da177e4
LT		 1012{
1013 int i;
1014
1015 /* stop urbs (to be sure) */
1016 deactivate_urbs(subs, force, 1);
1017 wait_clear_urbs(subs);
1018
1019 for (i = 0; i < MAX_URBS; i++)
1020 release_urb_ctx(&subs->dataurb[i]);
1021 for (i = 0; i < SYNC_URBS; i++)
1022 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 1023 usb_buffer_free(subs->dev, SYNC_URBS * 4,
1024 subs->syncbuf, subs->sync_dma);
1025 subs->syncbuf = NULL;
1da177e4
LT		 1026 subs->nurbs = 0;
1027}
1028
1029/*
1030 * initialize a substream for plaback/capture
1031 */
86e07d34 1032static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1da177e4
LT		 1033 unsigned int rate, unsigned int frame_bits)
1034{
1035 unsigned int maxsize, n, i;
1036 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
a93bf990 1037 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 1038
1039 /* calculate the frequency in 16.16 format */
1040 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1041 subs->freqn = get_usb_full_speed_rate(rate);
1042 else
1043 subs->freqn = get_usb_high_speed_rate(rate);
1044 subs->freqm = subs->freqn;
573567e0
CL		 1045 /* calculate max. frequency */
1046 if (subs->maxpacksize) {
1047 /* whatever fits into a max. size packet */
1da177e4 1048 maxsize = subs->maxpacksize;
573567e0
CL		 1049 subs->freqmax = (maxsize / (frame_bits >> 3))
1050 << (16 - subs->datainterval);
1051 } else {
1052 /* no max. packet size: just take 25% higher than nominal */
1053 subs->freqmax = subs->freqn + (subs->freqn >> 2);
1054 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
1055 >> (16 - subs->datainterval);
1da177e4 1056 }
573567e0 1057 subs->phase = 0;
1da177e4
LT		 1058
1059 if (subs->fill_max)
1060 subs->curpacksize = subs->maxpacksize;
1061 else
1062 subs->curpacksize = maxsize;
1063
a93bf990
CL		 1064 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
1065 packs_per_ms = 8 >> subs->datainterval;
1066 else
1067 packs_per_ms = 1;
9624ea81 1068 subs->packs_per_ms = packs_per_ms;
a93bf990 1069
71d848ca 1070 if (is_playback) {
1da177e4 1071 urb_packs = nrpacks;
71d848ca
CL		 1072 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
1073 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
1074 } else
15a24c07 1075 urb_packs = 1;
a93bf990 1076 urb_packs *= packs_per_ms;
1da177e4 1077
1da177e4 1078 /* decide how many packets to be used */
15a24c07 1079 if (is_playback) {
d6db392e
CL		 1080 unsigned int minsize;
1081 /* determine how small a packet can be */
1082 minsize = (subs->freqn >> (16 - subs->datainterval))
1083 * (frame_bits >> 3);
7efd8bc8 1084 /* with sync from device, assume it can be 12% lower */
d6db392e 1085 if (subs->syncpipe)
7efd8bc8 1086 minsize -= minsize >> 3;
d6db392e
CL		 1087 minsize = max(minsize, 1u);
1088 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990
CL		 1089 /* round up to multiple of packs_per_ms */
1090 total_packs = (total_packs + packs_per_ms - 1)
1091 & ~(packs_per_ms - 1);
1092 /* we need at least two URBs for queueing */
1093 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
1094 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
15a24c07
CL		 1095 } else {
1096 total_packs = MAX_URBS * urb_packs;
1097 }
1da177e4
LT		 1098 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1099 if (subs->nurbs > MAX_URBS) {
1100 /* too much... */
1101 subs->nurbs = MAX_URBS;
1102 total_packs = MAX_URBS * urb_packs;
1103 }
1104 n = total_packs;
1105 for (i = 0; i < subs->nurbs; i++) {
1106 npacks[i] = n > urb_packs ? urb_packs : n;
1107 n -= urb_packs;
1108 }
1109 if (subs->nurbs <= 1) {
1110 /* too little - we need at least two packets
1111 * to ensure contiguous playback/capture
1112 */
1113 subs->nurbs = 2;
1114 npacks[0] = (total_packs + 1) / 2;
1115 npacks[1] = total_packs - npacks[0];
a93bf990 1116 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1da177e4
LT		 1117 /* the last packet is too small.. */
1118 if (subs->nurbs > 2) {
1119 /* merge to the first one */
1120 npacks[0] += npacks[subs->nurbs - 1];
1121 subs->nurbs--;
1122 } else {
1123 /* divide to two */
1124 subs->nurbs = 2;
1125 npacks[0] = (total_packs + 1) / 2;
1126 npacks[1] = total_packs - npacks[0];
1127 }
1128 }
1129
1130 /* allocate and initialize data urbs */
1131 for (i = 0; i < subs->nurbs; i++) {
86e07d34 1132 struct snd_urb_ctx *u = &subs->dataurb[i];
1da177e4
LT		 1133 u->index = i;
1134 u->subs = subs;
1da177e4 1135 u->packets = npacks[i];
55851f73 1136 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1137 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1138 u->packets++; /* for transfer delimiter */
1da177e4 1139 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
55851f73
CL		 1140 if (! u->urb)
1141 goto out_of_memory;
1142 u->urb->transfer_buffer =
1143 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1144 &u->urb->transfer_dma);
1145 if (! u->urb->transfer_buffer)
1146 goto out_of_memory;
1da177e4 1147 u->urb->pipe = subs->datapipe;
55851f73 1148 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1149 u->urb->interval = 1 << subs->datainterval;
1da177e4 1150 u->urb->context = u;
3527a008 1151 u->urb->complete = snd_complete_urb;
1da177e4
LT		 1152 }
1153
1154 if (subs->syncpipe) {
1155 /* allocate and initialize sync urbs */
55851f73
CL		 1156 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1157 GFP_KERNEL, &subs->sync_dma);
1158 if (! subs->syncbuf)
1159 goto out_of_memory;
1da177e4 1160 for (i = 0; i < SYNC_URBS; i++) {
86e07d34 1161 struct snd_urb_ctx *u = &subs->syncurb[i];
1da177e4
LT		 1162 u->index = i;
1163 u->subs = subs;
ca81090a
CL		 1164 u->packets = 1;
1165 u->urb = usb_alloc_urb(1, GFP_KERNEL);
55851f73
CL		 1166 if (! u->urb)
1167 goto out_of_memory;
ca81090a 1168 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1169 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1170 u->urb->transfer_buffer_length = 4;
1da177e4 1171 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1172 u->urb->transfer_flags = URB_ISO_ASAP |
1173 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1174 u->urb->number_of_packets = 1;
1149a64f 1175 u->urb->interval = 1 << subs->syncinterval;
1da177e4 1176 u->urb->context = u;
3527a008 1177 u->urb->complete = snd_complete_sync_urb;
1da177e4
LT		 1178 }
1179 }
1180 return 0;
55851f73
CL		 1181
1182out_of_memory:
1183 release_substream_urbs(subs, 0);
1184 return -ENOMEM;
1da177e4
LT		 1185}
1186
1187
1188/*
1189 * find a matching audio format
1190 */
86e07d34 1191static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1da177e4
LT		 1192 unsigned int rate, unsigned int channels)
1193{
1194 struct list_head *p;
1195 struct audioformat *found = NULL;
1196 int cur_attr = 0, attr;
1197
1198 list_for_each(p, &subs->fmt_list) {
1199 struct audioformat *fp;
1200 fp = list_entry(p, struct audioformat, list);
1201 if (fp->format != format || fp->channels != channels)
1202 continue;
1203 if (rate < fp->rate_min || rate > fp->rate_max)
1204 continue;
1205 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1206 unsigned int i;
1207 for (i = 0; i < fp->nr_rates; i++)
1208 if (fp->rate_table[i] == rate)
1209 break;
1210 if (i >= fp->nr_rates)
1211 continue;
1212 }
1213 attr = fp->ep_attr & EP_ATTR_MASK;
1214 if (! found) {
1215 found = fp;
1216 cur_attr = attr;
1217 continue;
1218 }
1219 /* avoid async out and adaptive in if the other method
1220 * supports the same format.
1221 * this is a workaround for the case like
1222 * M-audio audiophile USB.
1223 */
1224 if (attr != cur_attr) {
1225 if ((attr == EP_ATTR_ASYNC &&
1226 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1227 (attr == EP_ATTR_ADAPTIVE &&
1228 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1229 continue;
1230 if ((cur_attr == EP_ATTR_ASYNC &&
1231 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1232 (cur_attr == EP_ATTR_ADAPTIVE &&
1233 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1234 found = fp;
1235 cur_attr = attr;
1236 continue;
1237 }
1238 }
1239 /* find the format with the largest max. packet size */
1240 if (fp->maxpacksize > found->maxpacksize) {
1241 found = fp;
1242 cur_attr = attr;
1243 }
1244 }
1245 return found;
1246}
1247
1248
1249/*
1250 * initialize the picth control and sample rate
1251 */
1252static int init_usb_pitch(struct usb_device *dev, int iface,
1253 struct usb_host_interface *alts,
1254 struct audioformat *fmt)
1255{
1256 unsigned int ep;
1257 unsigned char data[1];
1258 int err;
1259
1260 ep = get_endpoint(alts, 0)->bEndpointAddress;
1261 /* if endpoint has pitch control, enable it */
1262 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1263 data[0] = 1;
1264 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1265 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1266 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1267 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1268 dev->devnum, iface, ep);
1269 return err;
1270 }
1271 }
1272 return 0;
1273}
1274
1275static int init_usb_sample_rate(struct usb_device *dev, int iface,
1276 struct usb_host_interface *alts,
1277 struct audioformat *fmt, int rate)
1278{
1279 unsigned int ep;
1280 unsigned char data[3];
1281 int err;
1282
1283 ep = get_endpoint(alts, 0)->bEndpointAddress;
1284 /* if endpoint has sampling rate control, set it */
1285 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1286 int crate;
1287 data[0] = rate;
1288 data[1] = rate >> 8;
1289 data[2] = rate >> 16;
1290 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1291 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1292 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1293 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1294 dev->devnum, iface, fmt->altsetting, rate, ep);
1295 return err;
1296 }
1297 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1298 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1299 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1300 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1301 dev->devnum, iface, fmt->altsetting, ep);
1302 return 0; /* some devices don't support reading */
1303 }
1304 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1305 if (crate != rate) {
1306 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1307 // runtime->rate = crate;
1308 }
1309 }
1310 return 0;
1311}
1312
1313/*
1314 * find a matching format and set up the interface
1315 */
86e07d34 1316static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1da177e4
LT		 1317{
1318 struct usb_device *dev = subs->dev;
1319 struct usb_host_interface *alts;
1320 struct usb_interface_descriptor *altsd;
1321 struct usb_interface *iface;
1322 unsigned int ep, attr;
1323 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1324 int err;
1325
1326 iface = usb_ifnum_to_if(dev, fmt->iface);
1327 snd_assert(iface, return -EINVAL);
1328 alts = &iface->altsetting[fmt->altset_idx];
1329 altsd = get_iface_desc(alts);
1330 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1331
1332 if (fmt == subs->cur_audiofmt)
1333 return 0;
1334
1335 /* close the old interface */
1336 if (subs->interface >= 0 && subs->interface != fmt->iface) {
5149fe2c
ON		 1337 if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
1338 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
1339 dev->devnum, fmt->iface, fmt->altsetting);
1340 return -EIO;
1341 }
1da177e4
LT		 1342 subs->interface = -1;
1343 subs->format = 0;
1344 }
1345
1346 /* set interface */
1347 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1348 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1349 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1350 dev->devnum, fmt->iface, fmt->altsetting);
1351 return -EIO;
1352 }
1353 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1354 subs->interface = fmt->iface;
1355 subs->format = fmt->altset_idx;
1356 }
1357
1358 /* create a data pipe */
1359 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1360 if (is_playback)
1361 subs->datapipe = usb_sndisocpipe(dev, ep);
1362 else
1363 subs->datapipe = usb_rcvisocpipe(dev, ep);
573567e0
CL		 1364 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1365 get_endpoint(alts, 0)->bInterval >= 1 &&
1366 get_endpoint(alts, 0)->bInterval <= 4)
1367 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1368 else
1369 subs->datainterval = 0;
1da177e4
LT		 1370 subs->syncpipe = subs->syncinterval = 0;
1371 subs->maxpacksize = fmt->maxpacksize;
1372 subs->fill_max = 0;
1373
1374 /* we need a sync pipe in async OUT or adaptive IN mode */
1375 /* check the number of EP, since some devices have broken
1376 * descriptors which fool us. if it has only one EP,
1377 * assume it as adaptive-out or sync-in.
1378 */
1379 attr = fmt->ep_attr & EP_ATTR_MASK;
1380 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1381 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1382 altsd->bNumEndpoints >= 2) {
1383 /* check sync-pipe endpoint */
1384 /* ... and check descriptor size before accessing bSynchAddress
1385 because there is a version of the SB Audigy 2 NX firmware lacking
1386 the audio fields in the endpoint descriptors */
1387 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1388 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1389 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1390 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1391 dev->devnum, fmt->iface, fmt->altsetting);
1392 return -EINVAL;
1393 }
1394 ep = get_endpoint(alts, 1)->bEndpointAddress;
1395 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1396 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1397 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1398 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1399 dev->devnum, fmt->iface, fmt->altsetting);
1400 return -EINVAL;
1401 }
1402 ep &= USB_ENDPOINT_NUMBER_MASK;
1403 if (is_playback)
1404 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1405 else
1406 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1407 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1408 get_endpoint(alts, 1)->bRefresh >= 1 &&
1409 get_endpoint(alts, 1)->bRefresh <= 9)
1410 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1411 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1412 subs->syncinterval = 1;
604cf499
CL		 1413 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1414 get_endpoint(alts, 1)->bInterval <= 16)
1415 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1416 else
1417 subs->syncinterval = 3;
1da177e4
LT		 1418 }
1419
1420 /* always fill max packet size */
1421 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1422 subs->fill_max = 1;
1423
1424 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1425 return err;
1426
1427 subs->cur_audiofmt = fmt;
1428
1429#if 0
1430 printk("setting done: format = %d, rate = %d, channels = %d\n",
1431 fmt->format, fmt->rate, fmt->channels);
1432 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1433 subs->datapipe, subs->syncpipe);
1434#endif
1435
1436 return 0;
1437}
1438
1439/*
1440 * hw_params callback
1441 *
1442 * allocate a buffer and set the given audio format.
1443 *
1444 * so far we use a physically linear buffer although packetize transfer
1445 * doesn't need a continuous area.
1446 * if sg buffer is supported on the later version of alsa, we'll follow
1447 * that.
1448 */
86e07d34
TI		 1449static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1450 struct snd_pcm_hw_params *hw_params)
1da177e4 1451{
88518275 1452 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 1453 struct audioformat *fmt;
1454 unsigned int channels, rate, format;
1455 int ret, changed;
1456
6207e51b
CL		 1457 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1458 params_buffer_bytes(hw_params));
1da177e4
LT		 1459 if (ret < 0)
1460 return ret;
1461
1462 format = params_format(hw_params);
1463 rate = params_rate(hw_params);
1464 channels = params_channels(hw_params);
1465 fmt = find_format(subs, format, rate, channels);
1466 if (! fmt) {
21a3479a
JK		 1467 snd_printd(KERN_DEBUG "cannot set format: format = 0x%x, rate = %d, channels = %d\n",
1468 format, rate, channels);
1da177e4
LT		 1469 return -EINVAL;
1470 }
1471
1472 changed = subs->cur_audiofmt != fmt ||
1473 subs->period_bytes != params_period_bytes(hw_params) ||
1474 subs->cur_rate != rate;
1475 if ((ret = set_format(subs, fmt)) < 0)
1476 return ret;
1477
1478 if (subs->cur_rate != rate) {
1479 struct usb_host_interface *alts;
1480 struct usb_interface *iface;
1481 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1482 alts = &iface->altsetting[fmt->altset_idx];
1483 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1484 if (ret < 0)
1485 return ret;
1486 subs->cur_rate = rate;
1487 }
1488
1489 if (changed) {
1490 /* format changed */
1491 release_substream_urbs(subs, 0);
1492 /* influenced: period_bytes, channels, rate, format, */
1493 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1494 params_rate(hw_params),
1495 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1496 }
1497
1498 return ret;
1499}
1500
1501/*
1502 * hw_free callback
1503 *
1504 * reset the audio format and release the buffer
1505 */
86e07d34 1506static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1da177e4 1507{
88518275 1508 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 1509
1510 subs->cur_audiofmt = NULL;
1511 subs->cur_rate = 0;
1512 subs->period_bytes = 0;
de1b8b93
TI		 1513 if (!subs->stream->chip->shutdown)
1514 release_substream_urbs(subs, 0);
6207e51b 1515 return snd_pcm_free_vmalloc_buffer(substream);
1da177e4
LT		 1516}
1517
1518/*
1519 * prepare callback
1520 *
1521 * only a few subtle things...
1522 */
86e07d34 1523static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 1524{
86e07d34
TI		 1525 struct snd_pcm_runtime *runtime = substream->runtime;
1526 struct snd_usb_substream *subs = runtime->private_data;
1da177e4
LT		 1527
1528 if (! subs->cur_audiofmt) {
1529 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1530 return -ENXIO;
1531 }
1532
1533 /* some unit conversions in runtime */
1534 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1535 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1536
1537 /* reset the pointer */
1da177e4 1538 subs->hwptr_done = 0;
1da177e4
LT		 1539 subs->transfer_done = 0;
1540 subs->phase = 0;
1541
1542 /* clear urbs (to be sure) */
1543 deactivate_urbs(subs, 0, 1);
1544 wait_clear_urbs(subs);
1545
b55bbf06
CL		 1546 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1547 * updates for all URBs would happen at the same time when starting */
1548 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
e4f8e656 1549 subs->ops.prepare = prepare_nodata_playback_urb;
b55bbf06
CL		 1550 return start_urbs(subs, runtime);
1551 } else
1552 return 0;
1da177e4
LT		 1553}
1554
1700f308 1555static struct snd_pcm_hardware snd_usb_hardware =
1da177e4 1556{
49045d3d
CL		 1557 .info = SNDRV_PCM_INFO_MMAP |
1558 SNDRV_PCM_INFO_MMAP_VALID |
1559 SNDRV_PCM_INFO_BATCH |
1560 SNDRV_PCM_INFO_INTERLEAVED |
e4f8e656
CL		 1561 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1562 SNDRV_PCM_INFO_PAUSE,
d31cbbfd 1563 .buffer_bytes_max = 1024 * 1024,
1da177e4 1564 .period_bytes_min = 64,
d31cbbfd 1565 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1566 .periods_min = 2,
1567 .periods_max = 1024,
1568};
1569
1570/*
1571 * h/w constraints
1572 */
1573
1574#ifdef HW_CONST_DEBUG
1575#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1576#else
1577#define hwc_debug(fmt, args...) /**/
1578#endif
1579
86e07d34 1580static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
1da177e4 1581{
86e07d34
TI		 1582 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1583 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1584 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1585
1586 /* check the format */
1587 if (! snd_mask_test(fmts, fp->format)) {
1588 hwc_debug(" > check: no supported format %d\n", fp->format);
1589 return 0;
1590 }
1591 /* check the channels */
1592 if (fp->channels < ct->min || fp->channels > ct->max) {
1593 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1594 return 0;
1595 }
1596 /* check the rate is within the range */
1597 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1598 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1599 return 0;
1600 }
1601 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1602 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1603 return 0;
1604 }
1605 return 1;
1606}
1607
86e07d34
TI		 1608static int hw_rule_rate(struct snd_pcm_hw_params *params,
1609 struct snd_pcm_hw_rule *rule)
1da177e4 1610{
86e07d34 1611 struct snd_usb_substream *subs = rule->private;
1da177e4 1612 struct list_head *p;
86e07d34 1613 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 1614 unsigned int rmin, rmax;
1615 int changed;
1616
1617 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1618 changed = 0;
1619 rmin = rmax = 0;
1620 list_for_each(p, &subs->fmt_list) {
1621 struct audioformat *fp;
1622 fp = list_entry(p, struct audioformat, list);
1623 if (! hw_check_valid_format(params, fp))
1624 continue;
1625 if (changed++) {
1626 if (rmin > fp->rate_min)
1627 rmin = fp->rate_min;
1628 if (rmax < fp->rate_max)
1629 rmax = fp->rate_max;
1630 } else {
1631 rmin = fp->rate_min;
1632 rmax = fp->rate_max;
1633 }
1634 }
1635
1636 if (! changed) {
1637 hwc_debug(" --> get empty\n");
1638 it->empty = 1;
1639 return -EINVAL;
1640 }
1641
1642 changed = 0;
1643 if (it->min < rmin) {
1644 it->min = rmin;
1645 it->openmin = 0;
1646 changed = 1;
1647 }
1648 if (it->max > rmax) {
1649 it->max = rmax;
1650 it->openmax = 0;
1651 changed = 1;
1652 }
1653 if (snd_interval_checkempty(it)) {
1654 it->empty = 1;
1655 return -EINVAL;
1656 }
1657 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1658 return changed;
1659}
1660
1661
86e07d34
TI		 1662static int hw_rule_channels(struct snd_pcm_hw_params *params,
1663 struct snd_pcm_hw_rule *rule)
1da177e4 1664{
86e07d34 1665 struct snd_usb_substream *subs = rule->private;
1da177e4 1666 struct list_head *p;
86e07d34 1667 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1da177e4
LT		 1668 unsigned int rmin, rmax;
1669 int changed;
1670
1671 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1672 changed = 0;
1673 rmin = rmax = 0;
1674 list_for_each(p, &subs->fmt_list) {
1675 struct audioformat *fp;
1676 fp = list_entry(p, struct audioformat, list);
1677 if (! hw_check_valid_format(params, fp))
1678 continue;
1679 if (changed++) {
1680 if (rmin > fp->channels)
1681 rmin = fp->channels;
1682 if (rmax < fp->channels)
1683 rmax = fp->channels;
1684 } else {
1685 rmin = fp->channels;
1686 rmax = fp->channels;
1687 }
1688 }
1689
1690 if (! changed) {
1691 hwc_debug(" --> get empty\n");
1692 it->empty = 1;
1693 return -EINVAL;
1694 }
1695
1696 changed = 0;
1697 if (it->min < rmin) {
1698 it->min = rmin;
1699 it->openmin = 0;
1700 changed = 1;
1701 }
1702 if (it->max > rmax) {
1703 it->max = rmax;
1704 it->openmax = 0;
1705 changed = 1;
1706 }
1707 if (snd_interval_checkempty(it)) {
1708 it->empty = 1;
1709 return -EINVAL;
1710 }
1711 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1712 return changed;
1713}
1714
86e07d34
TI		 1715static int hw_rule_format(struct snd_pcm_hw_params *params,
1716 struct snd_pcm_hw_rule *rule)
1da177e4 1717{
86e07d34 1718 struct snd_usb_substream *subs = rule->private;
1da177e4 1719 struct list_head *p;
86e07d34 1720 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1721 u64 fbits;
1722 u32 oldbits[2];
1723 int changed;
1724
1725 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1726 fbits = 0;
1727 list_for_each(p, &subs->fmt_list) {
1728 struct audioformat *fp;
1729 fp = list_entry(p, struct audioformat, list);
1730 if (! hw_check_valid_format(params, fp))
1731 continue;
1732 fbits |= (1ULL << fp->format);
1733 }
1734
1735 oldbits[0] = fmt->bits[0];
1736 oldbits[1] = fmt->bits[1];
1737 fmt->bits[0] &= (u32)fbits;
1738 fmt->bits[1] &= (u32)(fbits >> 32);
1739 if (! fmt->bits[0] && ! fmt->bits[1]) {
1740 hwc_debug(" --> get empty\n");
1741 return -EINVAL;
1742 }
1743 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1744 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1745 return changed;
1746}
1747
1748#define MAX_MASK 64
1749
1750/*
1751 * check whether the registered audio formats need special hw-constraints
1752 */
86e07d34 1753static int check_hw_params_convention(struct snd_usb_substream *subs)
1da177e4
LT		 1754{
1755 int i;
1756 u32 *channels;
1757 u32 *rates;
1758 u32 cmaster, rmaster;
1759 u32 rate_min = 0, rate_max = 0;
1760 struct list_head *p;
1761 int err = 1;
1762
1763 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1764 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
ff17e953
JM		 1765 if (!channels || !rates)
1766 goto __out;
1da177e4
LT		 1767
1768 list_for_each(p, &subs->fmt_list) {
1769 struct audioformat *f;
1770 f = list_entry(p, struct audioformat, list);
1771 /* unconventional channels? */
1772 if (f->channels > 32)
1773 goto __out;
1774 /* continuous rate min/max matches? */
1775 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1776 if (rate_min && f->rate_min != rate_min)
1777 goto __out;
1778 if (rate_max && f->rate_max != rate_max)
1779 goto __out;
1780 rate_min = f->rate_min;
1781 rate_max = f->rate_max;
1782 }
1783 /* combination of continuous rates and fixed rates? */
1784 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1785 if (f->rates != rates[f->format])
1786 goto __out;
1787 }
1788 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1789 if (rates[f->format] && rates[f->format] != f->rates)
1790 goto __out;
1791 }
1792 channels[f->format] |= (1 << f->channels);
1793 rates[f->format] |= f->rates;
a79eee8d 1794 /* needs knot? */
918f3a0e 1795 if (f->rates & SNDRV_PCM_RATE_KNOT)
a79eee8d 1796 goto __out;
1da177e4
LT		 1797 }
1798 /* check whether channels and rates match for all formats */
1799 cmaster = rmaster = 0;
1800 for (i = 0; i < MAX_MASK; i++) {
1801 if (cmaster != channels[i] && cmaster && channels[i])
1802 goto __out;
1803 if (rmaster != rates[i] && rmaster && rates[i])
1804 goto __out;
1805 if (channels[i])
1806 cmaster = channels[i];
1807 if (rates[i])
1808 rmaster = rates[i];
1809 }
1810 /* check whether channels match for all distinct rates */
1811 memset(channels, 0, MAX_MASK * sizeof(u32));
1812 list_for_each(p, &subs->fmt_list) {
1813 struct audioformat *f;
1814 f = list_entry(p, struct audioformat, list);
1815 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1816 continue;
1817 for (i = 0; i < 32; i++) {
1818 if (f->rates & (1 << i))
1819 channels[i] |= (1 << f->channels);
1820 }
1821 }
1822 cmaster = 0;
1823 for (i = 0; i < 32; i++) {
1824 if (cmaster != channels[i] && cmaster && channels[i])
1825 goto __out;
1826 if (channels[i])
1827 cmaster = channels[i];
1828 }
1829 err = 0;
1830
1831 __out:
1832 kfree(channels);
1833 kfree(rates);
1834 return err;
1835}
1836
a79eee8d
LR		 1837/*
1838 * If the device supports unusual bit rates, does the request meet these?
1839 */
1840static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1841 struct snd_usb_substream *subs)
1842{
8fec560d
TI		 1843 struct audioformat *fp;
1844 int count = 0, needs_knot = 0;
a79eee8d
LR		 1845 int err;
1846
8fec560d
TI		 1847 list_for_each_entry(fp, &subs->fmt_list, list) {
1848 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1849 return 0;
1850 count += fp->nr_rates;
918f3a0e 1851 if (fp->rates & SNDRV_PCM_RATE_KNOT)
8fec560d 1852 needs_knot = 1;
a79eee8d 1853 }
8fec560d
TI		 1854 if (!needs_knot)
1855 return 0;
1856
1857 subs->rate_list.count = count;
1858 subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
1859 subs->rate_list.mask = 0;
1860 count = 0;
1861 list_for_each_entry(fp, &subs->fmt_list, list) {
1862 int i;
1863 for (i = 0; i < fp->nr_rates; i++)
1864 subs->rate_list.list[count++] = fp->rate_table[i];
1865 }
1866 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1867 &subs->rate_list);
1868 if (err < 0)
1869 return err;
a79eee8d
LR		 1870
1871 return 0;
1872}
1873
1da177e4
LT		 1874
1875/*
1876 * set up the runtime hardware information.
1877 */
1878
86e07d34 1879static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1da177e4
LT		 1880{
1881 struct list_head *p;
1882 int err;
1883
1884 runtime->hw.formats = subs->formats;
1885
1886 runtime->hw.rate_min = 0x7fffffff;
1887 runtime->hw.rate_max = 0;
1888 runtime->hw.channels_min = 256;
1889 runtime->hw.channels_max = 0;
1890 runtime->hw.rates = 0;
1891 /* check min/max rates and channels */
1892 list_for_each(p, &subs->fmt_list) {
1893 struct audioformat *fp;
1894 fp = list_entry(p, struct audioformat, list);
1895 runtime->hw.rates |= fp->rates;
1896 if (runtime->hw.rate_min > fp->rate_min)
1897 runtime->hw.rate_min = fp->rate_min;
1898 if (runtime->hw.rate_max < fp->rate_max)
1899 runtime->hw.rate_max = fp->rate_max;
1900 if (runtime->hw.channels_min > fp->channels)
1901 runtime->hw.channels_min = fp->channels;
1902 if (runtime->hw.channels_max < fp->channels)
1903 runtime->hw.channels_max = fp->channels;
1904 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1905 /* FIXME: there might be more than one audio formats... */
1906 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1907 fp->frame_size;
1908 }
1909 }
1910
1911 /* set the period time minimum 1ms */
81c4899f
TI		 1912 /* FIXME: high-speed mode allows 125us minimum period, but many parts
1913 * in the current code assume the 1ms period.
1914 */
1da177e4 1915 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
81c4899f 1916 1000 * MIN_PACKS_URB,
1da177e4
LT		 1917 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1918
1919 if (check_hw_params_convention(subs)) {
1920 hwc_debug("setting extra hw constraints...\n");
1921 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1922 hw_rule_rate, subs,
1923 SNDRV_PCM_HW_PARAM_FORMAT,
1924 SNDRV_PCM_HW_PARAM_CHANNELS,
1925 -1)) < 0)
1926 return err;
1927 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1928 hw_rule_channels, subs,
1929 SNDRV_PCM_HW_PARAM_FORMAT,
1930 SNDRV_PCM_HW_PARAM_RATE,
1931 -1)) < 0)
1932 return err;
1933 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1934 hw_rule_format, subs,
1935 SNDRV_PCM_HW_PARAM_RATE,
1936 SNDRV_PCM_HW_PARAM_CHANNELS,
1937 -1)) < 0)
1938 return err;
a79eee8d
LR		 1939 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
1940 return err;
1da177e4
LT		 1941 }
1942 return 0;
1943}
1944
1700f308 1945static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1da177e4 1946{
86e07d34
TI		 1947 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1948 struct snd_pcm_runtime *runtime = substream->runtime;
1949 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1950
1951 subs->interface = -1;
1952 subs->format = 0;
1700f308 1953 runtime->hw = snd_usb_hardware;
1da177e4
LT		 1954 runtime->private_data = subs;
1955 subs->pcm_substream = substream;
1956 return setup_hw_info(runtime, subs);
1957}
1958
86e07d34 1959static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1da177e4 1960{
86e07d34
TI		 1961 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1962 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1963
1964 if (subs->interface >= 0) {
1965 usb_set_interface(subs->dev, subs->interface, 0);
1966 subs->interface = -1;
1967 }
1968 subs->pcm_substream = NULL;
1969 return 0;
1970}
1971
86e07d34 1972static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1da177e4 1973{
1700f308 1974 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1da177e4
LT		 1975}
1976
86e07d34 1977static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1978{
1979 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1980}
1981
86e07d34 1982static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1da177e4 1983{
1700f308 1984 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1da177e4
LT		 1985}
1986
86e07d34 1987static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1988{
1989 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1990}
1991
86e07d34 1992static struct snd_pcm_ops snd_usb_playback_ops = {
1da177e4
LT		 1993 .open = snd_usb_playback_open,
1994 .close = snd_usb_playback_close,
1995 .ioctl = snd_pcm_lib_ioctl,
1996 .hw_params = snd_usb_hw_params,
1997 .hw_free = snd_usb_hw_free,
1998 .prepare = snd_usb_pcm_prepare,
b55bbf06 1999 .trigger = snd_usb_pcm_playback_trigger,
1da177e4 2000 .pointer = snd_usb_pcm_pointer,
6207e51b 2001 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 2002};
2003
86e07d34 2004static struct snd_pcm_ops snd_usb_capture_ops = {
1da177e4
LT		 2005 .open = snd_usb_capture_open,
2006 .close = snd_usb_capture_close,
2007 .ioctl = snd_pcm_lib_ioctl,
2008 .hw_params = snd_usb_hw_params,
2009 .hw_free = snd_usb_hw_free,
2010 .prepare = snd_usb_pcm_prepare,
b55bbf06 2011 .trigger = snd_usb_pcm_capture_trigger,
1da177e4 2012 .pointer = snd_usb_pcm_pointer,
6207e51b 2013 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 2014};
2015
2016
2017
2018/*
2019 * helper functions
2020 */
2021
2022/*
2023 * combine bytes and get an integer value
2024 */
2025unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
2026{
2027 switch (size) {
2028 case 1: return *bytes;
2029 case 2: return combine_word(bytes);
2030 case 3: return combine_triple(bytes);
2031 case 4: return combine_quad(bytes);
2032 default: return 0;
2033 }
2034}
2035
2036/*
2037 * parse descriptor buffer and return the pointer starting the given
2038 * descriptor type.
2039 */
2040void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
2041{
2042 u8 *p, *end, *next;
2043
2044 p = descstart;
2045 end = p + desclen;
2046 for (; p < end;) {
2047 if (p[0] < 2)
2048 return NULL;
2049 next = p + p[0];
2050 if (next > end)
2051 return NULL;
2052 if (p[1] == dtype && (!after || (void *)p > after)) {
2053 return p;
2054 }
2055 p = next;
2056 }
2057 return NULL;
2058}
2059
2060/*
2061 * find a class-specified interface descriptor with the given subtype.
2062 */
2063void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
2064{
2065 unsigned char *p = after;
2066
2067 while ((p = snd_usb_find_desc(buffer, buflen, p,
2068 USB_DT_CS_INTERFACE)) != NULL) {
2069 if (p[0] >= 3 && p[2] == dsubtype)
2070 return p;
2071 }
2072 return NULL;
2073}
2074
2075/*
2076 * Wrapper for usb_control_msg().
2077 * Allocates a temp buffer to prevent dmaing from/to the stack.
2078 */
2079int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
2080 __u8 requesttype, __u16 value, __u16 index, void *data,
2081 __u16 size, int timeout)
2082{
2083 int err;
2084 void *buf = NULL;
2085
2086 if (size > 0) {
52978be6 2087 buf = kmemdup(data, size, GFP_KERNEL);
1da177e4
LT		 2088 if (!buf)
2089 return -ENOMEM;
1da177e4
LT		 2090 }
2091 err = usb_control_msg(dev, pipe, request, requesttype,
2092 value, index, buf, size, timeout);
2093 if (size > 0) {
2094 memcpy(data, buf, size);
2095 kfree(buf);
2096 }
2097 return err;
2098}
2099
2100
2101/*
2102 * entry point for linux usb interface
2103 */
2104
2105static int usb_audio_probe(struct usb_interface *intf,
2106 const struct usb_device_id *id);
2107static void usb_audio_disconnect(struct usb_interface *intf);
93521d27
AM		 2108
2109#ifdef CONFIG_PM
f85bf29c
ON		 2110static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message);
2111static int usb_audio_resume(struct usb_interface *intf);
93521d27
AM		 2112#else
2113#define usb_audio_suspend NULL
2114#define usb_audio_resume NULL
2115#endif
1da177e4
LT		 2116
2117static struct usb_device_id usb_audio_ids [] = {
2118#include "usbquirks.h"
2119 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2120 .bInterfaceClass = USB_CLASS_AUDIO,
2121 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
2122 { } /* Terminating entry */
2123};
2124
2125MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2126
2127static struct usb_driver usb_audio_driver = {
1da177e4
LT		 2128 .name = "snd-usb-audio",
2129 .probe = usb_audio_probe,
2130 .disconnect = usb_audio_disconnect,
f85bf29c
ON		 2131 .suspend = usb_audio_suspend,
2132 .resume = usb_audio_resume,
1da177e4
LT		 2133 .id_table = usb_audio_ids,
2134};
2135
2136
727f317a 2137#if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
21a3479a 2138
1da177e4
LT		 2139/*
2140 * proc interface for list the supported pcm formats
2141 */
86e07d34 2142static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2143{
2144 struct list_head *p;
2145 static char *sync_types[4] = {
2146 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2147 };
2148
2149 list_for_each(p, &subs->fmt_list) {
2150 struct audioformat *fp;
2151 fp = list_entry(p, struct audioformat, list);
2152 snd_iprintf(buffer, " Interface %d\n", fp->iface);
2153 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
3f72a30c 2154 snd_iprintf(buffer, " Format: 0x%x\n", fp->format);
1da177e4
LT		 2155 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
2156 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
2157 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2158 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2159 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2160 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2161 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2162 fp->rate_min, fp->rate_max);
2163 } else {
2164 unsigned int i;
2165 snd_iprintf(buffer, " Rates: ");
2166 for (i = 0; i < fp->nr_rates; i++) {
2167 if (i > 0)
2168 snd_iprintf(buffer, ", ");
2169 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2170 }
2171 snd_iprintf(buffer, "\n");
2172 }
2173 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2174 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2175 }
2176}
2177
86e07d34 2178static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2179{
2180 if (subs->running) {
2181 unsigned int i;
2182 snd_iprintf(buffer, " Status: Running\n");
2183 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2184 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2185 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2186 for (i = 0; i < subs->nurbs; i++)
2187 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2188 snd_iprintf(buffer, "]\n");
2189 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2190 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2191 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2192 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2193 : get_high_speed_hz(subs->freqm),
2194 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2195 } else {
2196 snd_iprintf(buffer, " Status: Stop\n");
2197 }
2198}
2199
86e07d34 2200static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 2201{
86e07d34 2202 struct snd_usb_stream *stream = entry->private_data;
1da177e4
LT		 2203
2204 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2205
2206 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2207 snd_iprintf(buffer, "\nPlayback:\n");
2208 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2209 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2210 }
2211 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2212 snd_iprintf(buffer, "\nCapture:\n");
2213 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2214 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2215 }
2216}
2217
86e07d34 2218static void proc_pcm_format_add(struct snd_usb_stream *stream)
1da177e4 2219{
86e07d34 2220 struct snd_info_entry *entry;
1da177e4 2221 char name[32];
86e07d34 2222 struct snd_card *card = stream->chip->card;
1da177e4
LT		 2223
2224 sprintf(name, "stream%d", stream->pcm_index);
2225 if (! snd_card_proc_new(card, name, &entry))
bf850204 2226 snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
1da177e4
LT		 2227}
2228
21a3479a
JK		 2229#else
2230
2231static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
2232{
2233}
2234
2235#endif
1da177e4
LT		 2236
2237/*
2238 * initialize the substream instance.
2239 */
2240
86e07d34 2241static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
1da177e4 2242{
86e07d34 2243 struct snd_usb_substream *subs = &as->substream[stream];
1da177e4
LT		 2244
2245 INIT_LIST_HEAD(&subs->fmt_list);
2246 spin_lock_init(&subs->lock);
2247
2248 subs->stream = as;
2249 subs->direction = stream;
2250 subs->dev = as->chip->dev;
d513202e 2251 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) {
1da177e4 2252 subs->ops = audio_urb_ops[stream];
d513202e 2253 } else {
1da177e4 2254 subs->ops = audio_urb_ops_high_speed[stream];
d513202e
CL		 2255 switch (as->chip->usb_id) {
2256 case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
2257 case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
2258 subs->ops.retire_sync = retire_playback_sync_urb_hs_emu;
2259 break;
2260 }
2261 }
1da177e4
LT		 2262 snd_pcm_set_ops(as->pcm, stream,
2263 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2264 &snd_usb_playback_ops : &snd_usb_capture_ops);
2265
2266 list_add_tail(&fp->list, &subs->fmt_list);
2267 subs->formats |= 1ULL << fp->format;
2268 subs->endpoint = fp->endpoint;
2269 subs->num_formats++;
2270 subs->fmt_type = fp->fmt_type;
2271}
2272
2273
2274/*
2275 * free a substream
2276 */
86e07d34 2277static void free_substream(struct snd_usb_substream *subs)
1da177e4
LT		 2278{
2279 struct list_head *p, *n;
2280
2281 if (! subs->num_formats)
2282 return; /* not initialized */
2283 list_for_each_safe(p, n, &subs->fmt_list) {
2284 struct audioformat *fp = list_entry(p, struct audioformat, list);
2285 kfree(fp->rate_table);
2286 kfree(fp);
2287 }
8fec560d 2288 kfree(subs->rate_list.list);
1da177e4
LT		 2289}
2290
2291
2292/*
2293 * free a usb stream instance
2294 */
86e07d34 2295static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
1da177e4
LT		 2296{
2297 free_substream(&stream->substream[0]);
2298 free_substream(&stream->substream[1]);
2299 list_del(&stream->list);
2300 kfree(stream);
2301}
2302
86e07d34 2303static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
1da177e4 2304{
86e07d34 2305 struct snd_usb_stream *stream = pcm->private_data;
1da177e4
LT		 2306 if (stream) {
2307 stream->pcm = NULL;
1da177e4
LT		 2308 snd_usb_audio_stream_free(stream);
2309 }
2310}
2311
2312
2313/*
2314 * add this endpoint to the chip instance.
2315 * if a stream with the same endpoint already exists, append to it.
2316 * if not, create a new pcm stream.
2317 */
86e07d34 2318static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
1da177e4
LT		 2319{
2320 struct list_head *p;
86e07d34
TI		 2321 struct snd_usb_stream *as;
2322 struct snd_usb_substream *subs;
2323 struct snd_pcm *pcm;
1da177e4
LT		 2324 int err;
2325
2326 list_for_each(p, &chip->pcm_list) {
86e07d34 2327 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2328 if (as->fmt_type != fp->fmt_type)
2329 continue;
2330 subs = &as->substream[stream];
2331 if (! subs->endpoint)
2332 continue;
2333 if (subs->endpoint == fp->endpoint) {
2334 list_add_tail(&fp->list, &subs->fmt_list);
2335 subs->num_formats++;
2336 subs->formats |= 1ULL << fp->format;
2337 return 0;
2338 }
2339 }
2340 /* look for an empty stream */
2341 list_for_each(p, &chip->pcm_list) {
86e07d34 2342 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2343 if (as->fmt_type != fp->fmt_type)
2344 continue;
2345 subs = &as->substream[stream];
2346 if (subs->endpoint)
2347 continue;
2348 err = snd_pcm_new_stream(as->pcm, stream, 1);
2349 if (err < 0)
2350 return err;
2351 init_substream(as, stream, fp);
2352 return 0;
2353 }
2354
2355 /* create a new pcm */
59feddb2 2356 as = kzalloc(sizeof(*as), GFP_KERNEL);
1da177e4
LT		 2357 if (! as)
2358 return -ENOMEM;
1da177e4
LT		 2359 as->pcm_index = chip->pcm_devs;
2360 as->chip = chip;
2361 as->fmt_type = fp->fmt_type;
2362 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2363 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2364 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2365 &pcm);
2366 if (err < 0) {
2367 kfree(as);
2368 return err;
2369 }
2370 as->pcm = pcm;
2371 pcm->private_data = as;
2372 pcm->private_free = snd_usb_audio_pcm_free;
2373 pcm->info_flags = 0;
2374 if (chip->pcm_devs > 0)
2375 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2376 else
2377 strcpy(pcm->name, "USB Audio");
2378
2379 init_substream(as, stream, fp);
2380
2381 list_add(&as->list, &chip->pcm_list);
2382 chip->pcm_devs++;
2383
2384 proc_pcm_format_add(as);
2385
2386 return 0;
2387}
2388
2389
2390/*
2391 * check if the device uses big-endian samples
2392 */
86e07d34 2393static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1da177e4 2394{
27d10f56
CL		 2395 switch (chip->usb_id) {
2396 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2397 if (fp->endpoint & USB_DIR_IN)
1da177e4 2398 return 1;
27d10f56
CL		 2399 break;
2400 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
f8c78b82
TLM		 2401 if (device_setup[chip->index] == 0x00 ||
2402 fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
2403 return 1;
1da177e4
LT		 2404 }
2405 return 0;
2406}
2407
2408/*
2409 * parse the audio format type I descriptor
2410 * and returns the corresponding pcm format
2411 *
2412 * @dev: usb device
2413 * @fp: audioformat record
2414 * @format: the format tag (wFormatTag)
2415 * @fmt: the format type descriptor
2416 */
86e07d34 2417static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2418 int format, unsigned char *fmt)
2419{
2420 int pcm_format;
2421 int sample_width, sample_bytes;
2422
2423 /* FIXME: correct endianess and sign? */
2424 pcm_format = -1;
2425 sample_width = fmt[6];
2426 sample_bytes = fmt[5];
2427 switch (format) {
2428 case 0: /* some devices don't define this correctly... */
2429 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2430 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2431 /* fall-through */
2432 case USB_AUDIO_FORMAT_PCM:
2433 if (sample_width > sample_bytes * 8) {
2434 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2435 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2436 sample_width, sample_bytes);
2437 }
2438 /* check the format byte size */
2439 switch (fmt[5]) {
2440 case 1:
2441 pcm_format = SNDRV_PCM_FORMAT_S8;
2442 break;
2443 case 2:
27d10f56 2444 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2445 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2446 else
2447 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2448 break;
2449 case 3:
27d10f56 2450 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2451 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2452 else
2453 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2454 break;
2455 case 4:
2456 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2457 break;
2458 default:
2459 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2460 chip->dev->devnum, fp->iface,
2461 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2462 break;
2463 }
2464 break;
2465 case USB_AUDIO_FORMAT_PCM8:
2466 /* Dallas DS4201 workaround */
27d10f56 2467 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4
LT		 2468 pcm_format = SNDRV_PCM_FORMAT_S8;
2469 else
2470 pcm_format = SNDRV_PCM_FORMAT_U8;
2471 break;
2472 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2473 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2474 break;
2475 case USB_AUDIO_FORMAT_ALAW:
2476 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2477 break;
2478 case USB_AUDIO_FORMAT_MU_LAW:
2479 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2480 break;
2481 default:
2482 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2483 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2484 break;
2485 }
2486 return pcm_format;
2487}
2488
2489
2490/*
2491 * parse the format descriptor and stores the possible sample rates
2492 * on the audioformat table.
2493 *
2494 * @dev: usb device
2495 * @fp: audioformat record
2496 * @fmt: the format descriptor
2497 * @offset: the start offset of descriptor pointing the rate type
2498 * (7 for type I and II, 8 for type II)
2499 */
86e07d34 2500static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2501 unsigned char *fmt, int offset)
2502{
2503 int nr_rates = fmt[offset];
918f3a0e 2504
1da177e4
LT		 2505 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2506 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2507 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2508 return -1;
2509 }
2510
2511 if (nr_rates) {
2512 /*
2513 * build the rate table and bitmap flags
2514 */
918f3a0e 2515 int r, idx;
beb60119 2516 unsigned int nonzero_rates = 0;
918f3a0e 2517
1da177e4
LT		 2518 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2519 if (fp->rate_table == NULL) {
2520 snd_printk(KERN_ERR "cannot malloc\n");
2521 return -1;
2522 }
2523
2524 fp->nr_rates = nr_rates;
2525 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2526 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
987411b7
CL		 2527 unsigned int rate = combine_triple(&fmt[idx]);
2528 /* C-Media CM6501 mislabels its 96 kHz altsetting */
2529 if (rate == 48000 && nr_rates == 1 &&
2530 chip->usb_id == USB_ID(0x0d8c, 0x0201) &&
2531 fp->altsetting == 5 && fp->maxpacksize == 392)
2532 rate = 96000;
2533 fp->rate_table[r] = rate;
beb60119 2534 nonzero_rates |= rate;
1da177e4
LT		 2535 if (rate < fp->rate_min)
2536 fp->rate_min = rate;
2537 else if (rate > fp->rate_max)
2538 fp->rate_max = rate;
918f3a0e 2539 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
1da177e4 2540 }
beb60119
GJ		 2541 if (!nonzero_rates) {
2542 hwc_debug("All rates were zero. Skipping format!\n");
2543 return -1;
2544 }
1da177e4
LT		 2545 } else {
2546 /* continuous rates */
2547 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2548 fp->rate_min = combine_triple(&fmt[offset + 1]);
2549 fp->rate_max = combine_triple(&fmt[offset + 4]);
2550 }
2551 return 0;
2552}
2553
2554/*
2555 * parse the format type I and III descriptors
2556 */
86e07d34 2557static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2558 int format, unsigned char *fmt)
2559{
2560 int pcm_format;
2561
2562 if (fmt[3] == USB_FORMAT_TYPE_III) {
2563 /* FIXME: the format type is really IECxxx
2564 * but we give normal PCM format to get the existing
2565 * apps working...
2566 */
cac19c3b
TLM		 2567 switch (chip->usb_id) {
2568
2569 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2570 if (device_setup[chip->index] == 0x00 &&
2571 fp->altsetting == 6)
2572 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
2573 else
2574 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2575 break;
2576 default:
2577 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2578 }
1da177e4 2579 } else {
27d10f56 2580 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2581 if (pcm_format < 0)
2582 return -1;
2583 }
2584 fp->format = pcm_format;
2585 fp->channels = fmt[4];
2586 if (fp->channels < 1) {
2587 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2588 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2589 return -1;
2590 }
27d10f56 2591 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2592}
2593
2594/*
2595 * prase the format type II descriptor
2596 */
86e07d34 2597static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2598 int format, unsigned char *fmt)
2599{
2600 int brate, framesize;
2601 switch (format) {
2602 case USB_AUDIO_FORMAT_AC3:
2603 /* FIXME: there is no AC3 format defined yet */
2604 // fp->format = SNDRV_PCM_FORMAT_AC3;
2605 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2606 break;
2607 case USB_AUDIO_FORMAT_MPEG:
2608 fp->format = SNDRV_PCM_FORMAT_MPEG;
2609 break;
2610 default:
2611 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
27d10f56 2612 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2613 fp->format = SNDRV_PCM_FORMAT_MPEG;
2614 break;
2615 }
2616 fp->channels = 1;
2617 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2618 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2619 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2620 fp->frame_size = framesize;
27d10f56 2621 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2622}
2623
86e07d34 2624static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2625 int format, unsigned char *fmt, int stream)
2626{
2627 int err;
2628
2629 switch (fmt[3]) {
2630 case USB_FORMAT_TYPE_I:
2631 case USB_FORMAT_TYPE_III:
27d10f56 2632 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2633 break;
2634 case USB_FORMAT_TYPE_II:
27d10f56 2635 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2636 break;
2637 default:
2638 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2639 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2640 return -1;
2641 }
2642 fp->fmt_type = fmt[3];
2643 if (err < 0)
2644 return err;
2645#if 1
33159378 2646 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
1da177e4
LT		 2647 /* extigy apparently supports sample rates other than 48k
2648 * but not in ordinary way. so we enable only 48k atm.
2649 */
27d10f56 2650 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
33159378
CL		 2651 chip->usb_id == USB_ID(0x041e, 0x3020) ||
2652 chip->usb_id == USB_ID(0x041e, 0x3061)) {
1da177e4 2653 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2654 fp->rates != SNDRV_PCM_RATE_48000 &&
2655 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2656 return -1;
1da177e4
LT		 2657 }
2658#endif
2659 return 0;
2660}
2661
e311334e
TLM		 2662static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
2663 int iface, int altno);
86e07d34 2664static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
1da177e4
LT		 2665{
2666 struct usb_device *dev;
2667 struct usb_interface *iface;
2668 struct usb_host_interface *alts;
2669 struct usb_interface_descriptor *altsd;
2670 int i, altno, err, stream;
2671 int format;
2672 struct audioformat *fp;
2673 unsigned char *fmt, *csep;
2674
2675 dev = chip->dev;
2676
2677 /* parse the interface's altsettings */
2678 iface = usb_ifnum_to_if(dev, iface_no);
2679 for (i = 0; i < iface->num_altsetting; i++) {
2680 alts = &iface->altsetting[i];
2681 altsd = get_iface_desc(alts);
2682 /* skip invalid one */
2683 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2684 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2685 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2686 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2687 altsd->bNumEndpoints < 1 ||
2688 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2689 continue;
2690 /* must be isochronous */
2691 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2692 USB_ENDPOINT_XFER_ISOC)
2693 continue;
2694 /* check direction */
2695 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2696 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2697 altno = altsd->bAlternateSetting;
e311334e
TLM		 2698
2699 /* audiophile usb: skip altsets incompatible with device_setup
2700 */
2701 if (chip->usb_id == USB_ID(0x0763, 0x2003) &&
2702 audiophile_skip_setting_quirk(chip, iface_no, altno))
2703 continue;
1da177e4
LT		 2704
2705 /* get audio formats */
2706 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2707 if (!fmt) {
2708 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2709 dev->devnum, iface_no, altno);
2710 continue;
2711 }
2712
2713 if (fmt[0] < 7) {
2714 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2715 dev->devnum, iface_no, altno);
2716 continue;
2717 }
2718
2719 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2720
2721 /* get format type */
2722 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2723 if (!fmt) {
2724 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2725 dev->devnum, iface_no, altno);
2726 continue;
2727 }
2728 if (fmt[0] < 8) {
2729 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2730 dev->devnum, iface_no, altno);
2731 continue;
2732 }
2733
2734 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2735 /* Creamware Noah has this descriptor after the 2nd endpoint */
2736 if (!csep && altsd->bNumEndpoints >= 2)
2737 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2738 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
f8c75790 2739 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
faf8d117 2740 " class specific endpoint descriptor\n",
1da177e4 2741 dev->devnum, iface_no, altno);
faf8d117 2742 csep = NULL;
1da177e4
LT		 2743 }
2744
59feddb2 2745 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 2746 if (! fp) {
2747 snd_printk(KERN_ERR "cannot malloc\n");
2748 return -ENOMEM;
2749 }
2750
1da177e4
LT		 2751 fp->iface = iface_no;
2752 fp->altsetting = altno;
2753 fp->altset_idx = i;
2754 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2755 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
1da177e4 2756 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2757 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2758 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2759 * (fp->maxpacksize & 0x7ff);
faf8d117 2760 fp->attributes = csep ? csep[3] : 0;
1da177e4
LT		 2761
2762 /* some quirks for attributes here */
2763
c3f93297
CL		 2764 switch (chip->usb_id) {
2765 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2766 /* Optoplay sets the sample rate attribute although
2767 * it seems not supporting it in fact.
2768 */
2769 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2770 break;
2771 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2772 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2773 /* doesn't set the sample rate attribute, but supports it */
2774 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2775 break;
2776 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2777 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2778 an older model 77d:223) */
1da177e4
LT		 2779 /*
2780 * plantronics headset and Griffin iMic have set adaptive-in
2781 * although it's really not...
2782 */
1da177e4
LT		 2783 fp->ep_attr &= ~EP_ATTR_MASK;
2784 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2785 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2786 else
2787 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2788 break;
1da177e4
LT		 2789 }
2790
2791 /* ok, let's parse further... */
27d10f56 2792 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2793 kfree(fp->rate_table);
2794 kfree(fp);
2795 continue;
2796 }
2797
e311334e 2798 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, altno, fp->endpoint);
1da177e4
LT		 2799 err = add_audio_endpoint(chip, stream, fp);
2800 if (err < 0) {
2801 kfree(fp->rate_table);
2802 kfree(fp);
2803 return err;
2804 }
2805 /* try to set the interface... */
2806 usb_set_interface(chip->dev, iface_no, altno);
2807 init_usb_pitch(chip->dev, iface_no, alts, fp);
2808 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2809 }
2810 return 0;
2811}
2812
2813
2814/*
2815 * disconnect streams
2816 * called from snd_usb_audio_disconnect()
2817 */
ee733397 2818static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2819{
2820 int idx;
86e07d34
TI		 2821 struct snd_usb_stream *as;
2822 struct snd_usb_substream *subs;
1da177e4 2823
86e07d34 2824 as = list_entry(head, struct snd_usb_stream, list);
1da177e4
LT		 2825 for (idx = 0; idx < 2; idx++) {
2826 subs = &as->substream[idx];
2827 if (!subs->num_formats)
2828 return;
2829 release_substream_urbs(subs, 1);
2830 subs->interface = -1;
2831 }
2832}
2833
2834/*
2835 * parse audio control descriptor and create pcm/midi streams
2836 */
86e07d34 2837static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
1da177e4
LT		 2838{
2839 struct usb_device *dev = chip->dev;
2840 struct usb_host_interface *host_iface;
2841 struct usb_interface *iface;
2842 unsigned char *p1;
2843 int i, j;
2844
2845 /* find audiocontrol interface */
2846 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2847 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2848 snd_printk(KERN_ERR "cannot find HEADER\n");
2849 return -EINVAL;
2850 }
2851 if (! p1[7] || p1[0] < 8 + p1[7]) {
2852 snd_printk(KERN_ERR "invalid HEADER\n");
2853 return -EINVAL;
2854 }
2855
2856 /*
2857 * parse all USB audio streaming interfaces
2858 */
2859 for (i = 0; i < p1[7]; i++) {
2860 struct usb_host_interface *alts;
2861 struct usb_interface_descriptor *altsd;
2862 j = p1[8 + i];
2863 iface = usb_ifnum_to_if(dev, j);
2864 if (!iface) {
2865 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2866 dev->devnum, ctrlif, j);
2867 continue;
2868 }
2869 if (usb_interface_claimed(iface)) {
2870 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2871 continue;
2872 }
2873 alts = &iface->altsetting[0];
2874 altsd = get_iface_desc(alts);
2875 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2876 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2877 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2878 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2879 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2880 continue;
2881 }
2882 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2883 continue;
2884 }
2885 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2886 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2887 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2888 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2889 /* skip non-supported classes */
2890 continue;
2891 }
076639f6
CL		 2892 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
2893 snd_printk(KERN_ERR "low speed audio streaming not supported\n");
2894 continue;
2895 }
1da177e4
LT		 2896 if (! parse_audio_endpoints(chip, j)) {
2897 usb_set_interface(dev, j, 0); /* reset the current interface */
2898 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2899 }
2900 }
2901
2902 return 0;
2903}
2904
2905/*
2906 * create a stream for an endpoint/altsetting without proper descriptors
2907 */
86e07d34 2908static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
1da177e4 2909 struct usb_interface *iface,
86e07d34 2910 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2911{
2912 struct audioformat *fp;
2913 struct usb_host_interface *alts;
2914 int stream, err;
b4482a4b 2915 unsigned *rate_table = NULL;
1da177e4 2916
52978be6 2917 fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
1da177e4 2918 if (! fp) {
52978be6 2919 snd_printk(KERN_ERR "cannot memdup\n");
1da177e4
LT		 2920 return -ENOMEM;
2921 }
1da177e4
LT		 2922 if (fp->nr_rates > 0) {
2923 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2924 if (!rate_table) {
2925 kfree(fp);
2926 return -ENOMEM;
2927 }
2928 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2929 fp->rate_table = rate_table;
2930 }
2931
2932 stream = (fp->endpoint & USB_DIR_IN)
2933 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2934 err = add_audio_endpoint(chip, stream, fp);
2935 if (err < 0) {
2936 kfree(fp);
2937 kfree(rate_table);
2938 return err;
2939 }
2940 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2941 fp->altset_idx >= iface->num_altsetting) {
2942 kfree(fp);
2943 kfree(rate_table);
2944 return -EINVAL;
2945 }
2946 alts = &iface->altsetting[fp->altset_idx];
2947 usb_set_interface(chip->dev, fp->iface, 0);
2948 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2949 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2950 return 0;
2951}
2952
2953/*
2954 * create a stream for an interface with proper descriptors
2955 */
86e07d34 2956static int create_standard_audio_quirk(struct snd_usb_audio *chip,
d1bda045 2957 struct usb_interface *iface,
86e07d34 2958 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2959{
2960 struct usb_host_interface *alts;
2961 struct usb_interface_descriptor *altsd;
2962 int err;
2963
2964 alts = &iface->altsetting[0];
2965 altsd = get_iface_desc(alts);
d1bda045 2966 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
1da177e4
LT		 2967 if (err < 0) {
2968 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2969 altsd->bInterfaceNumber, err);
2970 return err;
2971 }
d1bda045
CL		 2972 /* reset the current interface */
2973 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
1da177e4
LT		 2974 return 0;
2975}
2976
2977/*
2978 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2979 * to detect the sample rate is by looking at wMaxPacketSize.
2980 */
86e07d34 2981static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
854af957 2982 struct usb_interface *iface,
86e07d34 2983 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2984{
2985 static const struct audioformat ua_format = {
2986 .format = SNDRV_PCM_FORMAT_S24_3LE,
2987 .channels = 2,
2988 .fmt_type = USB_FORMAT_TYPE_I,
2989 .altsetting = 1,
2990 .altset_idx = 1,
2991 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2992 };
2993 struct usb_host_interface *alts;
2994 struct usb_interface_descriptor *altsd;
2995 struct audioformat *fp;
2996 int stream, err;
2997
2998 /* both PCM and MIDI interfaces have 2 altsettings */
2999 if (iface->num_altsetting != 2)
3000 return -ENXIO;
3001 alts = &iface->altsetting[1];
3002 altsd = get_iface_desc(alts);
3003
3004 if (altsd->bNumEndpoints == 2) {
86e07d34 3005 static const struct snd_usb_midi_endpoint_info ua700_ep = {
1da177e4
LT		 3006 .out_cables = 0x0003,
3007 .in_cables = 0x0003
3008 };
86e07d34 3009 static const struct snd_usb_audio_quirk ua700_quirk = {
1da177e4
LT		 3010 .type = QUIRK_MIDI_FIXED_ENDPOINT,
3011 .data = &ua700_ep
3012 };
86e07d34 3013 static const struct snd_usb_midi_endpoint_info ua25_ep = {
1da177e4
LT		 3014 .out_cables = 0x0001,
3015 .in_cables = 0x0001
3016 };
86e07d34 3017 static const struct snd_usb_audio_quirk ua25_quirk = {
1da177e4
LT		 3018 .type = QUIRK_MIDI_FIXED_ENDPOINT,
3019 .data = &ua25_ep
3020 };
27d10f56 3021 if (chip->usb_id == USB_ID(0x0582, 0x002b))
1da177e4
LT		 3022 return snd_usb_create_midi_interface(chip, iface,
3023 &ua700_quirk);
3024 else
3025 return snd_usb_create_midi_interface(chip, iface,
3026 &ua25_quirk);
3027 }
3028
3029 if (altsd->bNumEndpoints != 1)
3030 return -ENXIO;
3031
3032 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
3033 if (!fp)
3034 return -ENOMEM;
3035 memcpy(fp, &ua_format, sizeof(*fp));
3036
3037 fp->iface = altsd->bInterfaceNumber;
3038 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3039 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3040 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3041
3042 switch (fp->maxpacksize) {
3043 case 0x120:
3044 fp->rate_max = fp->rate_min = 44100;
3045 break;
3046 case 0x138:
3047 case 0x140:
3048 fp->rate_max = fp->rate_min = 48000;
3049 break;
3050 case 0x258:
3051 case 0x260:
3052 fp->rate_max = fp->rate_min = 96000;
3053 break;
3054 default:
3055 snd_printk(KERN_ERR "unknown sample rate\n");
3056 kfree(fp);
3057 return -ENXIO;
3058 }
3059
3060 stream = (fp->endpoint & USB_DIR_IN)
3061 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3062 err = add_audio_endpoint(chip, stream, fp);
3063 if (err < 0) {
3064 kfree(fp);
3065 return err;
3066 }
3067 usb_set_interface(chip->dev, fp->iface, 0);
3068 return 0;
3069}
3070
3071/*
3072 * Create a stream for an Edirol UA-1000 interface.
3073 */
86e07d34 3074static int create_ua1000_quirk(struct snd_usb_audio *chip,
854af957 3075 struct usb_interface *iface,
86e07d34 3076 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3077{
3078 static const struct audioformat ua1000_format = {
3079 .format = SNDRV_PCM_FORMAT_S32_LE,
3080 .fmt_type = USB_FORMAT_TYPE_I,
3081 .altsetting = 1,
3082 .altset_idx = 1,
3083 .attributes = 0,
3084 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3085 };
3086 struct usb_host_interface *alts;
3087 struct usb_interface_descriptor *altsd;
3088 struct audioformat *fp;
3089 int stream, err;
3090
3091 if (iface->num_altsetting != 2)
3092 return -ENXIO;
3093 alts = &iface->altsetting[1];
3094 altsd = get_iface_desc(alts);
c4a87ef4 3095 if (alts->extralen != 11 || alts->extra[1] != USB_DT_CS_INTERFACE ||
1da177e4
LT		 3096 altsd->bNumEndpoints != 1)
3097 return -ENXIO;
3098
52978be6 3099 fp = kmemdup(&ua1000_format, sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 3100 if (!fp)
3101 return -ENOMEM;
1da177e4
LT		 3102
3103 fp->channels = alts->extra[4];
3104 fp->iface = altsd->bInterfaceNumber;
3105 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3106 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3107 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3108 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
3109
3110 stream = (fp->endpoint & USB_DIR_IN)
3111 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3112 err = add_audio_endpoint(chip, stream, fp);
3113 if (err < 0) {
3114 kfree(fp);
3115 return err;
3116 }
3117 /* FIXME: playback must be synchronized to capture */
3118 usb_set_interface(chip->dev, fp->iface, 0);
3119 return 0;
3120}
3121
d0b0fac1
BF		 3122/*
3123 * Create a stream for an Edirol UA-101 interface.
3124 * Copy, paste and modify from Edirol UA-1000
3125 */
3126static int create_ua101_quirk(struct snd_usb_audio *chip,
3127 struct usb_interface *iface,
3128 const struct snd_usb_audio_quirk *quirk)
3129{
3130 static const struct audioformat ua101_format = {
3131 .format = SNDRV_PCM_FORMAT_S32_LE,
3132 .fmt_type = USB_FORMAT_TYPE_I,
3133 .altsetting = 1,
3134 .altset_idx = 1,
3135 .attributes = 0,
3136 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3137 };
3138 struct usb_host_interface *alts;
3139 struct usb_interface_descriptor *altsd;
3140 struct audioformat *fp;
3141 int stream, err;
3142
3143 if (iface->num_altsetting != 2)
3144 return -ENXIO;
3145 alts = &iface->altsetting[1];
3146 altsd = get_iface_desc(alts);
3147 if (alts->extralen != 18 || alts->extra[1] != USB_DT_CS_INTERFACE ||
3148 altsd->bNumEndpoints != 1)
3149 return -ENXIO;
3150
3151 fp = kmemdup(&ua101_format, sizeof(*fp), GFP_KERNEL);
3152 if (!fp)
3153 return -ENOMEM;
3154
3155 fp->channels = alts->extra[11];
3156 fp->iface = altsd->bInterfaceNumber;
3157 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3158 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3159 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3160 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[15]);
3161
3162 stream = (fp->endpoint & USB_DIR_IN)
3163 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3164 err = add_audio_endpoint(chip, stream, fp);
3165 if (err < 0) {
3166 kfree(fp);
3167 return err;
3168 }
3169 /* FIXME: playback must be synchronized to capture */
3170 usb_set_interface(chip->dev, fp->iface, 0);
3171 return 0;
3172}
3173
86e07d34 3174static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3175 struct usb_interface *iface,
86e07d34 3176 const struct snd_usb_audio_quirk *quirk);
1da177e4
LT		 3177
3178/*
3179 * handle the quirks for the contained interfaces
3180 */
86e07d34 3181static int create_composite_quirk(struct snd_usb_audio *chip,
1da177e4 3182 struct usb_interface *iface,
86e07d34 3183 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3184{
3185 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
3186 int err;
3187
3188 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
3189 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
3190 if (!iface)
3191 continue;
3192 if (quirk->ifnum != probed_ifnum &&
3193 usb_interface_claimed(iface))
3194 continue;
3195 err = snd_usb_create_quirk(chip, iface, quirk);
3196 if (err < 0)
3197 return err;
3198 if (quirk->ifnum != probed_ifnum)
3199 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
3200 }
3201 return 0;
3202}
3203
86e07d34 3204static int ignore_interface_quirk(struct snd_usb_audio *chip,
854af957 3205 struct usb_interface *iface,
86e07d34 3206 const struct snd_usb_audio_quirk *quirk)
854af957
CL		 3207{
3208 return 0;
3209}
3210
1da177e4
LT		 3211
3212/*
3213 * boot quirks
3214 */
3215
3216#define EXTIGY_FIRMWARE_SIZE_OLD 794
3217#define EXTIGY_FIRMWARE_SIZE_NEW 483
3218
3219static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
3220{
3221 struct usb_host_config *config = dev->actconfig;
3222 int err;
3223
3224 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
3225 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
3226 snd_printdd("sending Extigy boot sequence...\n");
3227 /* Send message to force it to reconnect with full interface. */
3228 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3229 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3230 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3231 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3232 &dev->descriptor, sizeof(dev->descriptor));
3233 config = dev->actconfig;
3234 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3235 err = usb_reset_configuration(dev);
3236 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3237 snd_printdd("extigy_boot: new boot length = %d\n",
3238 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3239 return -ENODEV; /* quit this anyway */
3240 }
3241 return 0;
3242}
3243
3a2f0856
CL		 3244static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3245{
3a2f0856
CL		 3246 u8 buf = 1;
3247
3248 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3249 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3250 0, 0, &buf, 1, 1000);
3251 if (buf == 0) {
3252 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3253 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3254 1, 2000, NULL, 0, 1000);
3255 return -ENODEV;
3256 }
3a2f0856
CL		 3257 return 0;
3258}
3259
e217e30c
SR		 3260/*
3261 * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
3262 * documented in the device's data sheet.
3263 */
3264static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
3265{
3266 u8 buf[4];
3267 buf[0] = 0x20;
3268 buf[1] = value & 0xff;
3269 buf[2] = (value >> 8) & 0xff;
3270 buf[3] = reg;
3271 return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
3272 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
3273 0, 0, &buf, 4, 1000);
3274}
3275
3276static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
3277{
3278 /*
3279 * Enable line-out driver mode, set headphone source to front
3280 * channels, enable stereo mic.
3281 */
3282 return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
3283}
3284
3285
e311334e
TLM		 3286/*
3287 * Setup quirks
3288 */
3289#define AUDIOPHILE_SET 0x01 /* if set, parse device_setup */
3290#define AUDIOPHILE_SET_DTS 0x02 /* if set, enable DTS Digital Output */
3291#define AUDIOPHILE_SET_96K 0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
3292#define AUDIOPHILE_SET_24B 0x08 /* 24bits sample if set, 16bits otherwise */
3293#define AUDIOPHILE_SET_DI 0x10 /* if set, enable Digital Input */
3294#define AUDIOPHILE_SET_MASK 0x1F /* bit mask for setup value */
3295#define AUDIOPHILE_SET_24B_48K_DI 0x19 /* value for 24bits+48KHz+Digital Input */
3296#define AUDIOPHILE_SET_24B_48K_NOTDI 0x09 /* value for 24bits+48KHz+No Digital Input */
3297#define AUDIOPHILE_SET_16B_48K_DI 0x11 /* value for 16bits+48KHz+Digital Input */
3298#define AUDIOPHILE_SET_16B_48K_NOTDI 0x01 /* value for 16bits+48KHz+No Digital Input */
3299
3300static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
3301 int iface, int altno)
3302{
f8c78b82
TLM		 3303 /* Reset ALL ifaces to 0 altsetting.
3304 * Call it for every possible altsetting of every interface.
3305 */
3306 usb_set_interface(chip->dev, iface, 0);
3307
e311334e
TLM		 3308 if (device_setup[chip->index] & AUDIOPHILE_SET) {
3309 if ((device_setup[chip->index] & AUDIOPHILE_SET_DTS)
3310 && altno != 6)
3311 return 1; /* skip this altsetting */
3312 if ((device_setup[chip->index] & AUDIOPHILE_SET_96K)
3313 && altno != 1)
3314 return 1; /* skip this altsetting */
3315 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3316 AUDIOPHILE_SET_24B_48K_DI && altno != 2)
3317 return 1; /* skip this altsetting */
3318 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3319 AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
3320 return 1; /* skip this altsetting */
3321 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3322 AUDIOPHILE_SET_16B_48K_DI && altno != 4)
3323 return 1; /* skip this altsetting */
3324 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3325 AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
3326 return 1; /* skip this altsetting */
3327 }
3328 return 0; /* keep this altsetting */
3329}
1da177e4
LT		 3330
3331/*
3332 * audio-interface quirks
3333 *
3334 * returns zero if no standard audio/MIDI parsing is needed.
3335 * returns a postive value if standard audio/midi interfaces are parsed
3336 * after this.
3337 * returns a negative value at error.
3338 */
86e07d34 3339static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3340 struct usb_interface *iface,
86e07d34 3341 const struct snd_usb_audio_quirk *quirk)
1da177e4 3342{
86e07d34
TI		 3343 typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
3344 const struct snd_usb_audio_quirk *);
854af957
CL		 3345 static const quirk_func_t quirk_funcs[] = {
3346 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3347 [QUIRK_COMPOSITE] = create_composite_quirk,
3348 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3349 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3350 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3351 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3352 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3353 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3354 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
cc7a59bd 3355 [QUIRK_MIDI_CME] = snd_usb_create_midi_interface,
d1bda045 3356 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
854af957
CL		 3357 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3358 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3359 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
d0b0fac1 3360 [QUIRK_AUDIO_EDIROL_UA101] = create_ua101_quirk,
854af957
CL		 3361 };
3362
3363 if (quirk->type < QUIRK_TYPE_COUNT) {
3364 return quirk_funcs[quirk->type](chip, iface, quirk);
3365 } else {
1da177e4
LT		 3366 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3367 return -ENXIO;
3368 }
3369}
3370
3371
3372/*
3373 * common proc files to show the usb device info
3374 */
86e07d34 3375static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3376{
86e07d34 3377 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3378 if (! chip->shutdown)
3379 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3380}
3381
86e07d34 3382static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3383{
86e07d34 3384 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3385 if (! chip->shutdown)
3386 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3387 USB_ID_VENDOR(chip->usb_id),
3388 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3389}
3390
86e07d34 3391static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
1da177e4 3392{
86e07d34 3393 struct snd_info_entry *entry;
1da177e4 3394 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
bf850204 3395 snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
1da177e4 3396 if (! snd_card_proc_new(chip->card, "usbid", &entry))
bf850204 3397 snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
1da177e4
LT		 3398}
3399
3400/*
3401 * free the chip instance
3402 *
3403 * here we have to do not much, since pcm and controls are already freed
3404 *
3405 */
3406
86e07d34 3407static int snd_usb_audio_free(struct snd_usb_audio *chip)
1da177e4 3408{
2a2a5ddd 3409 usb_chip[chip->index] = NULL;
1da177e4
LT		 3410 kfree(chip);
3411 return 0;
3412}
3413
86e07d34 3414static int snd_usb_audio_dev_free(struct snd_device *device)
1da177e4 3415{
86e07d34 3416 struct snd_usb_audio *chip = device->device_data;
1da177e4
LT		 3417 return snd_usb_audio_free(chip);
3418}
3419
3420
3421/*
3422 * create a chip instance and set its names.
3423 */
3424static int snd_usb_audio_create(struct usb_device *dev, int idx,
86e07d34
TI		 3425 const struct snd_usb_audio_quirk *quirk,
3426 struct snd_usb_audio **rchip)
1da177e4 3427{
86e07d34
TI		 3428 struct snd_card *card;
3429 struct snd_usb_audio *chip;
1da177e4
LT		 3430 int err, len;
3431 char component[14];
86e07d34 3432 static struct snd_device_ops ops = {
1da177e4
LT		 3433 .dev_free = snd_usb_audio_dev_free,
3434 };
3435
3436 *rchip = NULL;
3437
076639f6
CL		 3438 if (snd_usb_get_speed(dev) != USB_SPEED_LOW &&
3439 snd_usb_get_speed(dev) != USB_SPEED_FULL &&
1da177e4
LT		 3440 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3441 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3442 return -ENXIO;
3443 }
3444
3445 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3446 if (card == NULL) {
3447 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3448 return -ENOMEM;
3449 }
3450
561b220a 3451 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4
LT		 3452 if (! chip) {
3453 snd_card_free(card);
3454 return -ENOMEM;
3455 }
3456
3457 chip->index = idx;
3458 chip->dev = dev;
3459 chip->card = card;
27d10f56
CL		 3460 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3461 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3462 INIT_LIST_HEAD(&chip->pcm_list);
3463 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3464 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3465
3466 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3467 snd_usb_audio_free(chip);
3468 snd_card_free(card);
3469 return err;
3470 }
3471
3472 strcpy(card->driver, "USB-Audio");
3473 sprintf(component, "USB%04x:%04x",
27d10f56 3474 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3475 snd_component_add(card, component);
3476
3477 /* retrieve the device string as shortname */
3478 if (quirk && quirk->product_name) {
3479 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3480 } else {
3481 if (!dev->descriptor.iProduct ||
3482 usb_string(dev, dev->descriptor.iProduct,
3483 card->shortname, sizeof(card->shortname)) <= 0) {
3484 /* no name available from anywhere, so use ID */
3485 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3486 USB_ID_VENDOR(chip->usb_id),
3487 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3488 }
3489 }
3490
3491 /* retrieve the vendor and device strings as longname */
3492 if (quirk && quirk->vendor_name) {
3493 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3494 } else {
3495 if (dev->descriptor.iManufacturer)
3496 len = usb_string(dev, dev->descriptor.iManufacturer,
3497 card->longname, sizeof(card->longname));
3498 else
3499 len = 0;
3500 /* we don't really care if there isn't any vendor string */
3501 }
3502 if (len > 0)
3503 strlcat(card->longname, " ", sizeof(card->longname));
3504
3505 strlcat(card->longname, card->shortname, sizeof(card->longname));
3506
3507 len = strlcat(card->longname, " at ", sizeof(card->longname));
3508
3509 if (len < sizeof(card->longname))
3510 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3511
3512 strlcat(card->longname,
076639f6
CL		 3513 snd_usb_get_speed(dev) == USB_SPEED_LOW ? ", low speed" :
3514 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" :
3515 ", high speed",
1da177e4
LT		 3516 sizeof(card->longname));
3517
3518 snd_usb_audio_create_proc(chip);
3519
1da177e4
LT		 3520 *rchip = chip;
3521 return 0;
3522}
3523
3524
3525/*
3526 * probe the active usb device
3527 *
3528 * note that this can be called multiple times per a device, when it
3529 * includes multiple audio control interfaces.
3530 *
3531 * thus we check the usb device pointer and creates the card instance
3532 * only at the first time. the successive calls of this function will
3533 * append the pcm interface to the corresponding card.
3534 */
3535static void *snd_usb_audio_probe(struct usb_device *dev,
3536 struct usb_interface *intf,
3537 const struct usb_device_id *usb_id)
3538{
86e07d34 3539 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
1da177e4 3540 int i, err;
86e07d34 3541 struct snd_usb_audio *chip;
1da177e4
LT		 3542 struct usb_host_interface *alts;
3543 int ifnum;
27d10f56 3544 u32 id;
1da177e4
LT		 3545
3546 alts = &intf->altsetting[0];
3547 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3548 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3549 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3550
3551 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3552 goto __err_val;
3553
3554 /* SB Extigy needs special boot-up sequence */
3555 /* if more models come, this will go to the quirk list. */
27d10f56 3556 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3557 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3558 goto __err_val;
1da177e4 3559 }
3a2f0856
CL		 3560 /* SB Audigy 2 NX needs its own boot-up magic, too */
3561 if (id == USB_ID(0x041e, 0x3020)) {
3562 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3563 goto __err_val;
3564 }
1da177e4 3565
e217e30c
SR		 3566 /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
3567 if (id == USB_ID(0x10f5, 0x0200)) {
3568 if (snd_usb_cm106_boot_quirk(dev) < 0)
3569 goto __err_val;
3570 }
3571
1da177e4
LT		 3572 /*
3573 * found a config. now register to ALSA
3574 */
3575
3576 /* check whether it's already registered */
3577 chip = NULL;
12aa7579 3578 mutex_lock(&register_mutex);
1da177e4
LT		 3579 for (i = 0; i < SNDRV_CARDS; i++) {
3580 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3581 if (usb_chip[i]->shutdown) {
3582 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3583 goto __error;
3584 }
3585 chip = usb_chip[i];
3586 break;
3587 }
3588 }
3589 if (! chip) {
3590 /* it's a fresh one.
3591 * now look for an empty slot and create a new card instance
3592 */
1da177e4
LT		 3593 for (i = 0; i < SNDRV_CARDS; i++)
3594 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3595 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3596 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3597 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3598 goto __error;
3599 }
1dcd3ec4 3600 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3601 break;
3602 }
3603 if (! chip) {
3604 snd_printk(KERN_ERR "no available usb audio device\n");
3605 goto __error;
3606 }
3607 }
3608
3609 err = 1; /* continue */
3610 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3611 /* need some special handlings */
3612 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3613 goto __error;
3614 }
3615
3616 if (err > 0) {
3617 /* create normal USB audio interfaces */
3618 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3619 snd_usb_create_mixer(chip, ifnum) < 0) {
3620 goto __error;
3621 }
3622 }
3623
3624 /* we are allowed to call snd_card_register() many times */
3625 if (snd_card_register(chip->card) < 0) {
3626 goto __error;
3627 }
3628
3629 usb_chip[chip->index] = chip;
3630 chip->num_interfaces++;
12aa7579 3631 mutex_unlock(&register_mutex);
1da177e4
LT		 3632 return chip;
3633
3634 __error:
3635 if (chip && !chip->num_interfaces)
3636 snd_card_free(chip->card);
12aa7579 3637 mutex_unlock(&register_mutex);
1da177e4
LT		 3638 __err_val:
3639 return NULL;
3640}
3641
3642/*
3643 * we need to take care of counter, since disconnection can be called also
3644 * many times as well as usb_audio_probe().
3645 */
3646static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3647{
86e07d34
TI		 3648 struct snd_usb_audio *chip;
3649 struct snd_card *card;
1da177e4
LT		 3650 struct list_head *p;
3651
3652 if (ptr == (void *)-1L)
3653 return;
3654
3655 chip = ptr;
3656 card = chip->card;
12aa7579 3657 mutex_lock(&register_mutex);
1da177e4
LT		 3658 chip->shutdown = 1;
3659 chip->num_interfaces--;
3660 if (chip->num_interfaces <= 0) {
3661 snd_card_disconnect(card);
3662 /* release the pcm resources */
3663 list_for_each(p, &chip->pcm_list) {
ee733397 3664 snd_usb_stream_disconnect(p);
1da177e4
LT		 3665 }
3666 /* release the midi resources */
3667 list_for_each(p, &chip->midi_list) {
ee733397 3668 snd_usbmidi_disconnect(p);
1da177e4 3669 }
84957a8a
CL		 3670 /* release mixer resources */
3671 list_for_each(p, &chip->mixer_list) {
3672 snd_usb_mixer_disconnect(p);
3673 }
12aa7579 3674 mutex_unlock(&register_mutex);
c461482c 3675 snd_card_free_when_closed(card);
1da177e4 3676 } else {
12aa7579 3677 mutex_unlock(&register_mutex);
1da177e4
LT		 3678 }
3679}
3680
3681/*
3682 * new 2.5 USB kernel API
3683 */
3684static int usb_audio_probe(struct usb_interface *intf,
3685 const struct usb_device_id *id)
3686{
3687 void *chip;
3688 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3689 if (chip) {
3690 dev_set_drvdata(&intf->dev, chip);
3691 return 0;
3692 } else
3693 return -EIO;
3694}
3695
3696static void usb_audio_disconnect(struct usb_interface *intf)
3697{
3698 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3699 dev_get_drvdata(&intf->dev));
3700}
3701
93521d27 3702#ifdef CONFIG_PM
f85bf29c
ON		 3703static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
3704{
3705 struct snd_usb_audio *chip = dev_get_drvdata(&intf->dev);
3706 struct list_head *p;
3707 struct snd_usb_stream *as;
3708
3709 if (chip == (void *)-1L)
3710 return 0;
3711
3712 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
3713 if (!chip->num_suspended_intf++) {
3714 list_for_each(p, &chip->pcm_list) {
3715 as = list_entry(p, struct snd_usb_stream, list);
3716 snd_pcm_suspend_all(as->pcm);
3717 }
3718 }
3719
3720 return 0;
3721}
3722
3723static int usb_audio_resume(struct usb_interface *intf)
3724{
3725 struct snd_usb_audio *chip = dev_get_drvdata(&intf->dev);
3726
3727 if (chip == (void *)-1L)
3728 return 0;
3729 if (--chip->num_suspended_intf)
3730 return 0;
3731 /*
3732 * ALSA leaves material resumption to user space
3733 * we just notify
3734 */
3735
3736 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
3737
3738 return 0;
3739}
93521d27 3740#endif /* CONFIG_PM */
1da177e4
LT		 3741
3742static int __init snd_usb_audio_init(void)
3743{
3744 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3745 printk(KERN_WARNING "invalid nrpacks value.\n");
3746 return -EINVAL;
3747 }
cf78bbc4 3748 return usb_register(&usb_audio_driver);
1da177e4
LT		 3749}
3750
3751
3752static void __exit snd_usb_audio_cleanup(void)
3753{
3754 usb_deregister(&usb_audio_driver);
3755}
3756
3757module_init(snd_usb_audio_init);
3758module_exit(snd_usb_audio_cleanup);
Linux kernel - Deliverables
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