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[ALSA] sound/usb/usbaudio.c: fix build with CONFIG_PM=n
[deliverable/linux.git] / sound / usb / usbaudio.c
CommitLineData
1da177e4
LT		 1/*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Main and PCM part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 *
28 * NOTES:
29 *
30 * - async unlink should be used for avoiding the sleep inside lock.
31 * 2.4.22 usb-uhci seems buggy for async unlinking and results in
32 * oops. in such a cse, pass async_unlink=0 option.
33 * - the linked URBs would be preferred but not used so far because of
34 * the instability of unlinking.
35 * - type II is not supported properly. there is no device which supports
36 * this type *correctly*. SB extigy looks as if it supports, but it's
37 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
38 */
39
40
41#include <sound/driver.h>
42#include <linux/bitops.h>
43#include <linux/init.h>
44#include <linux/list.h>
45#include <linux/slab.h>
46#include <linux/string.h>
47#include <linux/usb.h>
6207e51b 48#include <linux/vmalloc.h>
1da177e4 49#include <linux/moduleparam.h>
12aa7579 50#include <linux/mutex.h>
1da177e4
LT		 51#include <sound/core.h>
52#include <sound/info.h>
53#include <sound/pcm.h>
54#include <sound/pcm_params.h>
55#include <sound/initval.h>
56
57#include "usbaudio.h"
58
59
60MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
61MODULE_DESCRIPTION("USB Audio");
62MODULE_LICENSE("GPL");
63MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
64
65
66static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
67static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
68static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
69static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
70static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
92b9ac78 71static int nrpacks = 8; /* max. number of packets per urb */
1da177e4 72static int async_unlink = 1;
e311334e 73static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
1da177e4
LT		 74
75module_param_array(index, int, NULL, 0444);
76MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
77module_param_array(id, charp, NULL, 0444);
78MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
79module_param_array(enable, bool, NULL, 0444);
80MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
81module_param_array(vid, int, NULL, 0444);
82MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
83module_param_array(pid, int, NULL, 0444);
84MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
71d848ca 85module_param(nrpacks, int, 0644);
1da177e4
LT		 86MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
87module_param(async_unlink, bool, 0444);
88MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
e311334e
TLM		 89module_param_array(device_setup, int, NULL, 0444);
90MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
1da177e4
LT		 91
92
93/*
94 * debug the h/w constraints
95 */
96/* #define HW_CONST_DEBUG */
97
98
99/*
100 *
101 */
102
92b9ac78 103#define MAX_PACKS 20
1da177e4 104#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
15a24c07 105#define MAX_URBS 8
604cf499 106#define SYNC_URBS 4 /* always four urbs for sync */
1da177e4
LT		 107#define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
108
1da177e4
LT		 109struct audioformat {
110 struct list_head list;
111 snd_pcm_format_t format; /* format type */
112 unsigned int channels; /* # channels */
113 unsigned int fmt_type; /* USB audio format type (1-3) */
114 unsigned int frame_size; /* samples per frame for non-audio */
115 int iface; /* interface number */
116 unsigned char altsetting; /* corresponding alternate setting */
117 unsigned char altset_idx; /* array index of altenate setting */
118 unsigned char attributes; /* corresponding attributes of cs endpoint */
119 unsigned char endpoint; /* endpoint */
120 unsigned char ep_attr; /* endpoint attributes */
121 unsigned int maxpacksize; /* max. packet size */
122 unsigned int rates; /* rate bitmasks */
123 unsigned int rate_min, rate_max; /* min/max rates */
124 unsigned int nr_rates; /* number of rate table entries */
125 unsigned int *rate_table; /* rate table */
126};
127
86e07d34
TI		 128struct snd_usb_substream;
129
1da177e4
LT		 130struct snd_urb_ctx {
131 struct urb *urb;
55851f73 132 unsigned int buffer_size; /* size of data buffer, if data URB */
86e07d34 133 struct snd_usb_substream *subs;
1da177e4
LT		 134 int index; /* index for urb array */
135 int packets; /* number of packets per urb */
1da177e4
LT		 136};
137
138struct snd_urb_ops {
86e07d34
TI		 139 int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
140 int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
141 int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
142 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
1da177e4
LT		 143};
144
145struct snd_usb_substream {
86e07d34 146 struct snd_usb_stream *stream;
1da177e4 147 struct usb_device *dev;
86e07d34 148 struct snd_pcm_substream *pcm_substream;
1da177e4
LT		 149 int direction; /* playback or capture */
150 int interface; /* current interface */
151 int endpoint; /* assigned endpoint */
152 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
153 unsigned int cur_rate; /* current rate (for hw_params callback) */
154 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
155 unsigned int format; /* USB data format */
156 unsigned int datapipe; /* the data i/o pipe */
157 unsigned int syncpipe; /* 1 - async out or adaptive in */
573567e0 158 unsigned int datainterval; /* log_2 of data packet interval */
1da177e4
LT		 159 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
160 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
161 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
162 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
163 unsigned int phase; /* phase accumulator */
164 unsigned int maxpacksize; /* max packet size in bytes */
165 unsigned int maxframesize; /* max packet size in frames */
166 unsigned int curpacksize; /* current packet size in bytes (for capture) */
167 unsigned int curframesize; /* current packet size in frames (for capture) */
168 unsigned int fill_max: 1; /* fill max packet size always */
169 unsigned int fmt_type; /* USB audio format type (1-3) */
9624ea81 170 unsigned int packs_per_ms; /* packets per millisecond (for playback) */
1da177e4
LT		 171
172 unsigned int running: 1; /* running status */
173
1da177e4 174 unsigned int hwptr_done; /* processed frame position in the buffer */
1da177e4
LT		 175 unsigned int transfer_done; /* processed frames since last period update */
176 unsigned long active_mask; /* bitmask of active urbs */
177 unsigned long unlink_mask; /* bitmask of unlinked urbs */
178
179 unsigned int nurbs; /* # urbs */
86e07d34
TI		 180 struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
181 struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
55851f73
CL		 182 char *syncbuf; /* sync buffer for all sync URBs */
183 dma_addr_t sync_dma; /* DMA address of syncbuf */
1da177e4
LT		 184
185 u64 formats; /* format bitmasks (all or'ed) */
186 unsigned int num_formats; /* number of supported audio formats (list) */
187 struct list_head fmt_list; /* format list */
8fec560d 188 struct snd_pcm_hw_constraint_list rate_list; /* limited rates */
1da177e4
LT		 189 spinlock_t lock;
190
191 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
192};
193
194
195struct snd_usb_stream {
86e07d34
TI		 196 struct snd_usb_audio *chip;
197 struct snd_pcm *pcm;
1da177e4
LT		 198 int pcm_index;
199 unsigned int fmt_type; /* USB audio format type (1-3) */
86e07d34 200 struct snd_usb_substream substream[2];
1da177e4
LT		 201 struct list_head list;
202};
203
204
205/*
206 * we keep the snd_usb_audio_t instances by ourselves for merging
207 * the all interfaces on the same card as one sound device.
208 */
209
12aa7579 210static DEFINE_MUTEX(register_mutex);
86e07d34 211static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
1da177e4
LT		 212
213
214/*
215 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
216 * this will overflow at approx 524 kHz
217 */
77933d72 218static inline unsigned get_usb_full_speed_rate(unsigned int rate)
1da177e4
LT		 219{
220 return ((rate << 13) + 62) / 125;
221}
222
223/*
224 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
225 * this will overflow at approx 4 MHz
226 */
77933d72 227static inline unsigned get_usb_high_speed_rate(unsigned int rate)
1da177e4
LT		 228{
229 return ((rate << 10) + 62) / 125;
230}
231
232/* convert our full speed USB rate into sampling rate in Hz */
77933d72 233static inline unsigned get_full_speed_hz(unsigned int usb_rate)
1da177e4
LT		 234{
235 return (usb_rate * 125 + (1 << 12)) >> 13;
236}
237
238/* convert our high speed USB rate into sampling rate in Hz */
77933d72 239static inline unsigned get_high_speed_hz(unsigned int usb_rate)
1da177e4
LT		 240{
241 return (usb_rate * 125 + (1 << 9)) >> 10;
242}
243
244
245/*
246 * prepare urb for full speed capture sync pipe
247 *
248 * fill the length and offset of each urb descriptor.
249 * the fixed 10.14 frequency is passed through the pipe.
250 */
86e07d34
TI		 251static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
252 struct snd_pcm_runtime *runtime,
1da177e4
LT		 253 struct urb *urb)
254{
255 unsigned char *cp = urb->transfer_buffer;
88518275 256 struct snd_urb_ctx *ctx = urb->context;
1da177e4 257
1da177e4 258 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 259 urb->iso_frame_desc[0].length = 3;
260 urb->iso_frame_desc[0].offset = 0;
261 cp[0] = subs->freqn >> 2;
262 cp[1] = subs->freqn >> 10;
263 cp[2] = subs->freqn >> 18;
1da177e4
LT		 264 return 0;
265}
266
267/*
268 * prepare urb for high speed capture sync pipe
269 *
270 * fill the length and offset of each urb descriptor.
271 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
272 */
86e07d34
TI		 273static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
274 struct snd_pcm_runtime *runtime,
1da177e4
LT		 275 struct urb *urb)
276{
277 unsigned char *cp = urb->transfer_buffer;
88518275 278 struct snd_urb_ctx *ctx = urb->context;
1da177e4 279
1da177e4 280 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 281 urb->iso_frame_desc[0].length = 4;
282 urb->iso_frame_desc[0].offset = 0;
283 cp[0] = subs->freqn;
284 cp[1] = subs->freqn >> 8;
285 cp[2] = subs->freqn >> 16;
286 cp[3] = subs->freqn >> 24;
1da177e4
LT		 287 return 0;
288}
289
290/*
291 * process after capture sync complete
292 * - nothing to do
293 */
86e07d34
TI		 294static int retire_capture_sync_urb(struct snd_usb_substream *subs,
295 struct snd_pcm_runtime *runtime,
1da177e4
LT		 296 struct urb *urb)
297{
298 return 0;
299}
300
301/*
302 * prepare urb for capture data pipe
303 *
304 * fill the offset and length of each descriptor.
305 *
306 * we use a temporary buffer to write the captured data.
307 * since the length of written data is determined by host, we cannot
308 * write onto the pcm buffer directly... the data is thus copied
309 * later at complete callback to the global buffer.
310 */
86e07d34
TI		 311static int prepare_capture_urb(struct snd_usb_substream *subs,
312 struct snd_pcm_runtime *runtime,
1da177e4
LT		 313 struct urb *urb)
314{
315 int i, offs;
88518275 316 struct snd_urb_ctx *ctx = urb->context;
1da177e4
LT		 317
318 offs = 0;
319 urb->dev = ctx->subs->dev; /* we need to set this at each time */
1da177e4
LT		 320 for (i = 0; i < ctx->packets; i++) {
321 urb->iso_frame_desc[i].offset = offs;
322 urb->iso_frame_desc[i].length = subs->curpacksize;
323 offs += subs->curpacksize;
1da177e4 324 }
1da177e4 325 urb->transfer_buffer_length = offs;
b263a9bd 326 urb->number_of_packets = ctx->packets;
1da177e4
LT		 327 return 0;
328}
329
330/*
331 * process after capture complete
332 *
333 * copy the data from each desctiptor to the pcm buffer, and
334 * update the current position.
335 */
86e07d34
TI		 336static int retire_capture_urb(struct snd_usb_substream *subs,
337 struct snd_pcm_runtime *runtime,
1da177e4
LT		 338 struct urb *urb)
339{
340 unsigned long flags;
341 unsigned char *cp;
342 int i;
343 unsigned int stride, len, oldptr;
b263a9bd 344 int period_elapsed = 0;
1da177e4
LT		 345
346 stride = runtime->frame_bits >> 3;
347
348 for (i = 0; i < urb->number_of_packets; i++) {
349 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
350 if (urb->iso_frame_desc[i].status) {
351 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
352 // continue;
353 }
354 len = urb->iso_frame_desc[i].actual_length / stride;
355 if (! len)
356 continue;
357 /* update the current pointer */
358 spin_lock_irqsave(&subs->lock, flags);
359 oldptr = subs->hwptr_done;
360 subs->hwptr_done += len;
361 if (subs->hwptr_done >= runtime->buffer_size)
362 subs->hwptr_done -= runtime->buffer_size;
363 subs->transfer_done += len;
b263a9bd
CL		 364 if (subs->transfer_done >= runtime->period_size) {
365 subs->transfer_done -= runtime->period_size;
366 period_elapsed = 1;
367 }
1da177e4
LT		 368 spin_unlock_irqrestore(&subs->lock, flags);
369 /* copy a data chunk */
370 if (oldptr + len > runtime->buffer_size) {
371 unsigned int cnt = runtime->buffer_size - oldptr;
372 unsigned int blen = cnt * stride;
373 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
374 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
375 } else {
376 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
377 }
1da177e4 378 }
b263a9bd
CL		 379 if (period_elapsed)
380 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 381 return 0;
382}
383
e4f8e656
CL		 384/*
385 * Process after capture complete when paused. Nothing to do.
386 */
387static int retire_paused_capture_urb(struct snd_usb_substream *subs,
388 struct snd_pcm_runtime *runtime,
389 struct urb *urb)
390{
391 return 0;
392}
393
1da177e4
LT		 394
395/*
396 * prepare urb for full speed playback sync pipe
397 *
398 * set up the offset and length to receive the current frequency.
399 */
400
86e07d34
TI		 401static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
402 struct snd_pcm_runtime *runtime,
1da177e4
LT		 403 struct urb *urb)
404{
88518275 405 struct snd_urb_ctx *ctx = urb->context;
1da177e4 406
1da177e4 407 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 408 urb->iso_frame_desc[0].length = 3;
409 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 410 return 0;
411}
412
413/*
414 * prepare urb for high speed playback sync pipe
415 *
416 * set up the offset and length to receive the current frequency.
417 */
418
86e07d34
TI		 419static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
420 struct snd_pcm_runtime *runtime,
1da177e4
LT		 421 struct urb *urb)
422{
88518275 423 struct snd_urb_ctx *ctx = urb->context;
1da177e4 424
1da177e4 425 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 426 urb->iso_frame_desc[0].length = 4;
427 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 428 return 0;
429}
430
431/*
432 * process after full speed playback sync complete
433 *
434 * retrieve the current 10.14 frequency from pipe, and set it.
435 * the value is referred in prepare_playback_urb().
436 */
86e07d34
TI		 437static int retire_playback_sync_urb(struct snd_usb_substream *subs,
438 struct snd_pcm_runtime *runtime,
1da177e4
LT		 439 struct urb *urb)
440{
ca81090a 441 unsigned int f;
1da177e4
LT		 442 unsigned long flags;
443
ca81090a
CL		 444 if (urb->iso_frame_desc[0].status == 0 &&
445 urb->iso_frame_desc[0].actual_length == 3) {
446 f = combine_triple((u8*)urb->transfer_buffer) << 2;
50cdbf15
CL		 447 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
448 spin_lock_irqsave(&subs->lock, flags);
449 subs->freqm = f;
450 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4 451 }
1da177e4
LT		 452 }
453
454 return 0;
455}
456
457/*
458 * process after high speed playback sync complete
459 *
460 * retrieve the current 12.13 frequency from pipe, and set it.
461 * the value is referred in prepare_playback_urb().
462 */
86e07d34
TI		 463static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
464 struct snd_pcm_runtime *runtime,
1da177e4
LT		 465 struct urb *urb)
466{
ca81090a 467 unsigned int f;
1da177e4
LT		 468 unsigned long flags;
469
ca81090a
CL		 470 if (urb->iso_frame_desc[0].status == 0 &&
471 urb->iso_frame_desc[0].actual_length == 4) {
472 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
50cdbf15
CL		 473 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
474 spin_lock_irqsave(&subs->lock, flags);
475 subs->freqm = f;
476 spin_unlock_irqrestore(&subs->lock, flags);
477 }
1da177e4
LT		 478 }
479
480 return 0;
481}
482
9568f461
CL		 483/* determine the number of frames in the next packet */
484static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
485{
486 if (subs->fill_max)
487 return subs->maxframesize;
488 else {
489 subs->phase = (subs->phase & 0xffff)
490 + (subs->freqm << subs->datainterval);
491 return min(subs->phase >> 16, subs->maxframesize);
492 }
493}
494
b55bbf06 495/*
e4f8e656 496 * Prepare urb for streaming before playback starts or when paused.
b55bbf06 497 *
e4f8e656 498 * We don't have any data, so we send a frame of silence.
b55bbf06 499 */
e4f8e656
CL		 500static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
501 struct snd_pcm_runtime *runtime,
502 struct urb *urb)
b55bbf06 503{
4b284928 504 unsigned int i, offs, counts;
86e07d34 505 struct snd_urb_ctx *ctx = urb->context;
4b284928 506 int stride = runtime->frame_bits >> 3;
b55bbf06 507
4b284928 508 offs = 0;
b55bbf06
CL		 509 urb->dev = ctx->subs->dev;
510 urb->number_of_packets = subs->packs_per_ms;
511 for (i = 0; i < subs->packs_per_ms; ++i) {
9568f461 512 counts = snd_usb_audio_next_packet_size(subs);
4b284928
CL		 513 urb->iso_frame_desc[i].offset = offs * stride;
514 urb->iso_frame_desc[i].length = counts * stride;
515 offs += counts;
b55bbf06 516 }
4b284928
CL		 517 urb->transfer_buffer_length = offs * stride;
518 memset(urb->transfer_buffer,
519 subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
520 offs * stride);
b55bbf06
CL		 521 return 0;
522}
523
1da177e4
LT		 524/*
525 * prepare urb for playback data pipe
526 *
7efd8bc8
CL		 527 * Since a URB can handle only a single linear buffer, we must use double
528 * buffering when the data to be transferred overflows the buffer boundary.
529 * To avoid inconsistencies when updating hwptr_done, we use double buffering
530 * for all URBs.
1da177e4 531 */
86e07d34
TI		 532static int prepare_playback_urb(struct snd_usb_substream *subs,
533 struct snd_pcm_runtime *runtime,
1da177e4
LT		 534 struct urb *urb)
535{
536 int i, stride, offs;
537 unsigned int counts;
538 unsigned long flags;
7efd8bc8 539 int period_elapsed = 0;
88518275 540 struct snd_urb_ctx *ctx = urb->context;
1da177e4
LT		 541
542 stride = runtime->frame_bits >> 3;
543
544 offs = 0;
545 urb->dev = ctx->subs->dev; /* we need to set this at each time */
546 urb->number_of_packets = 0;
547 spin_lock_irqsave(&subs->lock, flags);
548 for (i = 0; i < ctx->packets; i++) {
9568f461 549 counts = snd_usb_audio_next_packet_size(subs);
1da177e4
LT		 550 /* set up descriptor */
551 urb->iso_frame_desc[i].offset = offs * stride;
552 urb->iso_frame_desc[i].length = counts * stride;
553 offs += counts;
554 urb->number_of_packets++;
7efd8bc8
CL		 555 subs->transfer_done += counts;
556 if (subs->transfer_done >= runtime->period_size) {
557 subs->transfer_done -= runtime->period_size;
558 period_elapsed = 1;
1da177e4 559 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
7efd8bc8
CL		 560 if (subs->transfer_done > 0) {
561 /* FIXME: fill-max mode is not
562 * supported yet */
563 offs -= subs->transfer_done;
564 counts -= subs->transfer_done;
565 urb->iso_frame_desc[i].length =
566 counts * stride;
567 subs->transfer_done = 0;
1da177e4
LT		 568 }
569 i++;
570 if (i < ctx->packets) {
571 /* add a transfer delimiter */
7efd8bc8
CL		 572 urb->iso_frame_desc[i].offset =
573 offs * stride;
1da177e4
LT		 574 urb->iso_frame_desc[i].length = 0;
575 urb->number_of_packets++;
576 }
9624ea81 577 break;
1da177e4 578 }
1da177e4 579 }
9624ea81
CL		 580 /* finish at the frame boundary at/after the period boundary */
581 if (period_elapsed &&
582 (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
583 break;
1da177e4 584 }
7efd8bc8
CL		 585 if (subs->hwptr_done + offs > runtime->buffer_size) {
586 /* err, the transferred area goes over buffer boundary. */
587 unsigned int len = runtime->buffer_size - subs->hwptr_done;
588 memcpy(urb->transfer_buffer,
589 runtime->dma_area + subs->hwptr_done * stride,
590 len * stride);
591 memcpy(urb->transfer_buffer + len * stride,
592 runtime->dma_area,
593 (offs - len) * stride);
1da177e4 594 } else {
7efd8bc8
CL		 595 memcpy(urb->transfer_buffer,
596 runtime->dma_area + subs->hwptr_done * stride,
597 offs * stride);
1da177e4 598 }
7efd8bc8
CL		 599 subs->hwptr_done += offs;
600 if (subs->hwptr_done >= runtime->buffer_size)
601 subs->hwptr_done -= runtime->buffer_size;
1da177e4
LT		 602 spin_unlock_irqrestore(&subs->lock, flags);
603 urb->transfer_buffer_length = offs * stride;
b55bbf06
CL		 604 if (period_elapsed)
605 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 606 return 0;
607}
608
609/*
610 * process after playback data complete
7efd8bc8 611 * - nothing to do
1da177e4 612 */
86e07d34
TI		 613static int retire_playback_urb(struct snd_usb_substream *subs,
614 struct snd_pcm_runtime *runtime,
1da177e4
LT		 615 struct urb *urb)
616{
1da177e4
LT		 617 return 0;
618}
619
620
621/*
622 */
623static struct snd_urb_ops audio_urb_ops[2] = {
624 {
e4f8e656 625 .prepare = prepare_nodata_playback_urb,
1da177e4
LT		 626 .retire = retire_playback_urb,
627 .prepare_sync = prepare_playback_sync_urb,
628 .retire_sync = retire_playback_sync_urb,
629 },
630 {
631 .prepare = prepare_capture_urb,
632 .retire = retire_capture_urb,
633 .prepare_sync = prepare_capture_sync_urb,
634 .retire_sync = retire_capture_sync_urb,
635 },
636};
637
638static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
639 {
e4f8e656 640 .prepare = prepare_nodata_playback_urb,
1da177e4
LT		 641 .retire = retire_playback_urb,
642 .prepare_sync = prepare_playback_sync_urb_hs,
643 .retire_sync = retire_playback_sync_urb_hs,
644 },
645 {
646 .prepare = prepare_capture_urb,
647 .retire = retire_capture_urb,
648 .prepare_sync = prepare_capture_sync_urb_hs,
649 .retire_sync = retire_capture_sync_urb,
650 },
651};
652
653/*
654 * complete callback from data urb
655 */
7d12e780 656static void snd_complete_urb(struct urb *urb)
1da177e4 657{
88518275 658 struct snd_urb_ctx *ctx = urb->context;
86e07d34
TI		 659 struct snd_usb_substream *subs = ctx->subs;
660 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 661 int err = 0;
662
663 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
664 ! subs->running || /* can be stopped during retire callback */
665 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
666 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
667 clear_bit(ctx->index, &subs->active_mask);
668 if (err < 0) {
669 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
670 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
671 }
672 }
673}
674
675
676/*
677 * complete callback from sync urb
678 */
7d12e780 679static void snd_complete_sync_urb(struct urb *urb)
1da177e4 680{
88518275 681 struct snd_urb_ctx *ctx = urb->context;
86e07d34
TI		 682 struct snd_usb_substream *subs = ctx->subs;
683 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 684 int err = 0;
685
686 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
687 ! subs->running || /* can be stopped during retire callback */
688 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
689 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
690 clear_bit(ctx->index + 16, &subs->active_mask);
691 if (err < 0) {
692 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
693 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
694 }
695 }
696}
697
698
6207e51b 699/* get the physical page pointer at the given offset */
86e07d34 700static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
6207e51b
CL		 701 unsigned long offset)
702{
703 void *pageptr = subs->runtime->dma_area + offset;
704 return vmalloc_to_page(pageptr);
705}
706
707/* allocate virtual buffer; may be called more than once */
86e07d34 708static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
6207e51b 709{
86e07d34 710 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b
CL		 711 if (runtime->dma_area) {
712 if (runtime->dma_bytes >= size)
713 return 0; /* already large enough */
b1d5776d 714 vfree(runtime->dma_area);
6207e51b 715 }
b1d5776d 716 runtime->dma_area = vmalloc(size);
6207e51b
CL		 717 if (! runtime->dma_area)
718 return -ENOMEM;
719 runtime->dma_bytes = size;
720 return 0;
721}
722
723/* free virtual buffer; may be called more than once */
86e07d34 724static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
6207e51b 725{
86e07d34 726 struct snd_pcm_runtime *runtime = subs->runtime;
9c4be3d3
JJ		 727
728 vfree(runtime->dma_area);
729 runtime->dma_area = NULL;
6207e51b
CL		 730 return 0;
731}
732
733
1da177e4
LT		 734/*
735 * unlink active urbs.
736 */
86e07d34 737static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
1da177e4
LT		 738{
739 unsigned int i;
740 int async;
741
742 subs->running = 0;
743
744 if (!force && subs->stream->chip->shutdown) /* to be sure... */
745 return -EBADFD;
746
747 async = !can_sleep && async_unlink;
748
749 if (! async && in_interrupt())
750 return 0;
751
752 for (i = 0; i < subs->nurbs; i++) {
753 if (test_bit(i, &subs->active_mask)) {
754 if (! test_and_set_bit(i, &subs->unlink_mask)) {
755 struct urb *u = subs->dataurb[i].urb;
b375a049 756 if (async)
1da177e4 757 usb_unlink_urb(u);
b375a049 758 else
1da177e4
LT		 759 usb_kill_urb(u);
760 }
761 }
762 }
763 if (subs->syncpipe) {
764 for (i = 0; i < SYNC_URBS; i++) {
765 if (test_bit(i+16, &subs->active_mask)) {
766 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
767 struct urb *u = subs->syncurb[i].urb;
b375a049 768 if (async)
1da177e4 769 usb_unlink_urb(u);
b375a049 770 else
1da177e4
LT		 771 usb_kill_urb(u);
772 }
773 }
774 }
775 }
776 return 0;
777}
778
779
32e19e88
CL		 780static const char *usb_error_string(int err)
781{
782 switch (err) {
783 case -ENODEV:
784 return "no device";
785 case -ENOENT:
786 return "endpoint not enabled";
787 case -EPIPE:
788 return "endpoint stalled";
789 case -ENOSPC:
790 return "not enough bandwidth";
791 case -ESHUTDOWN:
792 return "device disabled";
793 case -EHOSTUNREACH:
794 return "device suspended";
3e964432
CL		 795#ifndef CONFIG_USB_EHCI_SPLIT_ISO
796 case -ENOSYS:
797 return "enable CONFIG_USB_EHCI_SPLIT_ISO to play through a hub";
798#endif
32e19e88
CL		 799 case -EINVAL:
800 case -EAGAIN:
801 case -EFBIG:
802 case -EMSGSIZE:
803 return "internal error";
804 default:
805 return "unknown error";
806 }
807}
808
1da177e4
LT		 809/*
810 * set up and start data/sync urbs
811 */
86e07d34 812static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
1da177e4
LT		 813{
814 unsigned int i;
815 int err;
816
817 if (subs->stream->chip->shutdown)
818 return -EBADFD;
819
820 for (i = 0; i < subs->nurbs; i++) {
821 snd_assert(subs->dataurb[i].urb, return -EINVAL);
822 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
823 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
824 goto __error;
825 }
826 }
827 if (subs->syncpipe) {
828 for (i = 0; i < SYNC_URBS; i++) {
829 snd_assert(subs->syncurb[i].urb, return -EINVAL);
830 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
831 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
832 goto __error;
833 }
834 }
835 }
836
837 subs->active_mask = 0;
838 subs->unlink_mask = 0;
839 subs->running = 1;
840 for (i = 0; i < subs->nurbs; i++) {
32e19e88
CL		 841 err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC);
842 if (err < 0) {
843 snd_printk(KERN_ERR "cannot submit datapipe "
844 "for urb %d, error %d: %s\n",
845 i, err, usb_error_string(err));
1da177e4
LT		 846 goto __error;
847 }
848 set_bit(i, &subs->active_mask);
849 }
850 if (subs->syncpipe) {
851 for (i = 0; i < SYNC_URBS; i++) {
32e19e88
CL		 852 err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC);
853 if (err < 0) {
854 snd_printk(KERN_ERR "cannot submit syncpipe "
855 "for urb %d, error %d: %s\n",
856 i, err, usb_error_string(err));
1da177e4
LT		 857 goto __error;
858 }
859 set_bit(i + 16, &subs->active_mask);
860 }
861 }
862 return 0;
863
864 __error:
865 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
866 deactivate_urbs(subs, 0, 0);
867 return -EPIPE;
868}
869
870
871/*
872 * wait until all urbs are processed.
873 */
86e07d34 874static int wait_clear_urbs(struct snd_usb_substream *subs)
1da177e4 875{
b27c187f 876 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 877 unsigned int i;
878 int alive;
879
880 do {
881 alive = 0;
882 for (i = 0; i < subs->nurbs; i++) {
883 if (test_bit(i, &subs->active_mask))
884 alive++;
885 }
886 if (subs->syncpipe) {
887 for (i = 0; i < SYNC_URBS; i++) {
888 if (test_bit(i + 16, &subs->active_mask))
889 alive++;
890 }
891 }
892 if (! alive)
893 break;
8433a509 894 schedule_timeout_uninterruptible(1);
b27c187f 895 } while (time_before(jiffies, end_time));
1da177e4
LT		 896 if (alive)
897 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
898 return 0;
899}
900
901
902/*
903 * return the current pcm pointer. just return the hwptr_done value.
904 */
86e07d34 905static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 906{
86e07d34 907 struct snd_usb_substream *subs;
daa150ef
CL		 908 snd_pcm_uframes_t hwptr_done;
909
86e07d34 910 subs = (struct snd_usb_substream *)substream->runtime->private_data;
daa150ef
CL		 911 spin_lock(&subs->lock);
912 hwptr_done = subs->hwptr_done;
913 spin_unlock(&subs->lock);
914 return hwptr_done;
1da177e4
LT		 915}
916
917
918/*
b55bbf06 919 * start/stop playback substream
1da177e4 920 */
86e07d34 921static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
b55bbf06 922 int cmd)
1da177e4 923{
86e07d34 924 struct snd_usb_substream *subs = substream->runtime->private_data;
b55bbf06
CL		 925
926 switch (cmd) {
927 case SNDRV_PCM_TRIGGER_START:
e4f8e656 928 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
b55bbf06
CL		 929 subs->ops.prepare = prepare_playback_urb;
930 return 0;
931 case SNDRV_PCM_TRIGGER_STOP:
932 return deactivate_urbs(subs, 0, 0);
e4f8e656
CL		 933 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
934 subs->ops.prepare = prepare_nodata_playback_urb;
935 return 0;
b55bbf06
CL		 936 default:
937 return -EINVAL;
938 }
939}
940
941/*
942 * start/stop capture substream
943 */
86e07d34 944static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
b55bbf06
CL		 945 int cmd)
946{
86e07d34 947 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 948
949 switch (cmd) {
950 case SNDRV_PCM_TRIGGER_START:
e4f8e656 951 subs->ops.retire = retire_capture_urb;
b55bbf06 952 return start_urbs(subs, substream->runtime);
1da177e4 953 case SNDRV_PCM_TRIGGER_STOP:
b55bbf06 954 return deactivate_urbs(subs, 0, 0);
e4f8e656
CL		 955 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
956 subs->ops.retire = retire_paused_capture_urb;
957 return 0;
958 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
959 subs->ops.retire = retire_capture_urb;
960 return 0;
1da177e4 961 default:
b55bbf06 962 return -EINVAL;
1da177e4 963 }
1da177e4
LT		 964}
965
966
967/*
968 * release a urb data
969 */
86e07d34 970static void release_urb_ctx(struct snd_urb_ctx *u)
1da177e4
LT		 971{
972 if (u->urb) {
55851f73
CL		 973 if (u->buffer_size)
974 usb_buffer_free(u->subs->dev, u->buffer_size,
975 u->urb->transfer_buffer,
976 u->urb->transfer_dma);
1da177e4
LT		 977 usb_free_urb(u->urb);
978 u->urb = NULL;
979 }
1da177e4
LT		 980}
981
982/*
983 * release a substream
984 */
86e07d34 985static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1da177e4
LT		 986{
987 int i;
988
989 /* stop urbs (to be sure) */
990 deactivate_urbs(subs, force, 1);
991 wait_clear_urbs(subs);
992
993 for (i = 0; i < MAX_URBS; i++)
994 release_urb_ctx(&subs->dataurb[i]);
995 for (i = 0; i < SYNC_URBS; i++)
996 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 997 usb_buffer_free(subs->dev, SYNC_URBS * 4,
998 subs->syncbuf, subs->sync_dma);
999 subs->syncbuf = NULL;
1da177e4
LT		 1000 subs->nurbs = 0;
1001}
1002
1003/*
1004 * initialize a substream for plaback/capture
1005 */
86e07d34 1006static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1da177e4
LT		 1007 unsigned int rate, unsigned int frame_bits)
1008{
1009 unsigned int maxsize, n, i;
1010 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
a93bf990 1011 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 1012
1013 /* calculate the frequency in 16.16 format */
1014 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1015 subs->freqn = get_usb_full_speed_rate(rate);
1016 else
1017 subs->freqn = get_usb_high_speed_rate(rate);
1018 subs->freqm = subs->freqn;
573567e0
CL		 1019 /* calculate max. frequency */
1020 if (subs->maxpacksize) {
1021 /* whatever fits into a max. size packet */
1da177e4 1022 maxsize = subs->maxpacksize;
573567e0
CL		 1023 subs->freqmax = (maxsize / (frame_bits >> 3))
1024 << (16 - subs->datainterval);
1025 } else {
1026 /* no max. packet size: just take 25% higher than nominal */
1027 subs->freqmax = subs->freqn + (subs->freqn >> 2);
1028 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
1029 >> (16 - subs->datainterval);
1da177e4 1030 }
573567e0 1031 subs->phase = 0;
1da177e4
LT		 1032
1033 if (subs->fill_max)
1034 subs->curpacksize = subs->maxpacksize;
1035 else
1036 subs->curpacksize = maxsize;
1037
a93bf990
CL		 1038 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
1039 packs_per_ms = 8 >> subs->datainterval;
1040 else
1041 packs_per_ms = 1;
9624ea81 1042 subs->packs_per_ms = packs_per_ms;
a93bf990 1043
71d848ca 1044 if (is_playback) {
1da177e4 1045 urb_packs = nrpacks;
71d848ca
CL		 1046 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
1047 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
1048 } else
15a24c07 1049 urb_packs = 1;
a93bf990 1050 urb_packs *= packs_per_ms;
1da177e4 1051
1da177e4 1052 /* decide how many packets to be used */
15a24c07 1053 if (is_playback) {
d6db392e
CL		 1054 unsigned int minsize;
1055 /* determine how small a packet can be */
1056 minsize = (subs->freqn >> (16 - subs->datainterval))
1057 * (frame_bits >> 3);
7efd8bc8 1058 /* with sync from device, assume it can be 12% lower */
d6db392e 1059 if (subs->syncpipe)
7efd8bc8 1060 minsize -= minsize >> 3;
d6db392e
CL		 1061 minsize = max(minsize, 1u);
1062 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990
CL		 1063 /* round up to multiple of packs_per_ms */
1064 total_packs = (total_packs + packs_per_ms - 1)
1065 & ~(packs_per_ms - 1);
1066 /* we need at least two URBs for queueing */
1067 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
1068 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
15a24c07
CL		 1069 } else {
1070 total_packs = MAX_URBS * urb_packs;
1071 }
1da177e4
LT		 1072 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1073 if (subs->nurbs > MAX_URBS) {
1074 /* too much... */
1075 subs->nurbs = MAX_URBS;
1076 total_packs = MAX_URBS * urb_packs;
1077 }
1078 n = total_packs;
1079 for (i = 0; i < subs->nurbs; i++) {
1080 npacks[i] = n > urb_packs ? urb_packs : n;
1081 n -= urb_packs;
1082 }
1083 if (subs->nurbs <= 1) {
1084 /* too little - we need at least two packets
1085 * to ensure contiguous playback/capture
1086 */
1087 subs->nurbs = 2;
1088 npacks[0] = (total_packs + 1) / 2;
1089 npacks[1] = total_packs - npacks[0];
a93bf990 1090 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1da177e4
LT		 1091 /* the last packet is too small.. */
1092 if (subs->nurbs > 2) {
1093 /* merge to the first one */
1094 npacks[0] += npacks[subs->nurbs - 1];
1095 subs->nurbs--;
1096 } else {
1097 /* divide to two */
1098 subs->nurbs = 2;
1099 npacks[0] = (total_packs + 1) / 2;
1100 npacks[1] = total_packs - npacks[0];
1101 }
1102 }
1103
1104 /* allocate and initialize data urbs */
1105 for (i = 0; i < subs->nurbs; i++) {
86e07d34 1106 struct snd_urb_ctx *u = &subs->dataurb[i];
1da177e4
LT		 1107 u->index = i;
1108 u->subs = subs;
1da177e4 1109 u->packets = npacks[i];
55851f73 1110 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1111 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1112 u->packets++; /* for transfer delimiter */
1da177e4 1113 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
55851f73
CL		 1114 if (! u->urb)
1115 goto out_of_memory;
1116 u->urb->transfer_buffer =
1117 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1118 &u->urb->transfer_dma);
1119 if (! u->urb->transfer_buffer)
1120 goto out_of_memory;
1da177e4 1121 u->urb->pipe = subs->datapipe;
55851f73 1122 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1123 u->urb->interval = 1 << subs->datainterval;
1da177e4 1124 u->urb->context = u;
3527a008 1125 u->urb->complete = snd_complete_urb;
1da177e4
LT		 1126 }
1127
1128 if (subs->syncpipe) {
1129 /* allocate and initialize sync urbs */
55851f73
CL		 1130 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1131 GFP_KERNEL, &subs->sync_dma);
1132 if (! subs->syncbuf)
1133 goto out_of_memory;
1da177e4 1134 for (i = 0; i < SYNC_URBS; i++) {
86e07d34 1135 struct snd_urb_ctx *u = &subs->syncurb[i];
1da177e4
LT		 1136 u->index = i;
1137 u->subs = subs;
ca81090a
CL		 1138 u->packets = 1;
1139 u->urb = usb_alloc_urb(1, GFP_KERNEL);
55851f73
CL		 1140 if (! u->urb)
1141 goto out_of_memory;
ca81090a 1142 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1143 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1144 u->urb->transfer_buffer_length = 4;
1da177e4 1145 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1146 u->urb->transfer_flags = URB_ISO_ASAP |
1147 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1148 u->urb->number_of_packets = 1;
1149a64f 1149 u->urb->interval = 1 << subs->syncinterval;
1da177e4 1150 u->urb->context = u;
3527a008 1151 u->urb->complete = snd_complete_sync_urb;
1da177e4
LT		 1152 }
1153 }
1154 return 0;
55851f73
CL		 1155
1156out_of_memory:
1157 release_substream_urbs(subs, 0);
1158 return -ENOMEM;
1da177e4
LT		 1159}
1160
1161
1162/*
1163 * find a matching audio format
1164 */
86e07d34 1165static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1da177e4
LT		 1166 unsigned int rate, unsigned int channels)
1167{
1168 struct list_head *p;
1169 struct audioformat *found = NULL;
1170 int cur_attr = 0, attr;
1171
1172 list_for_each(p, &subs->fmt_list) {
1173 struct audioformat *fp;
1174 fp = list_entry(p, struct audioformat, list);
1175 if (fp->format != format || fp->channels != channels)
1176 continue;
1177 if (rate < fp->rate_min || rate > fp->rate_max)
1178 continue;
1179 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1180 unsigned int i;
1181 for (i = 0; i < fp->nr_rates; i++)
1182 if (fp->rate_table[i] == rate)
1183 break;
1184 if (i >= fp->nr_rates)
1185 continue;
1186 }
1187 attr = fp->ep_attr & EP_ATTR_MASK;
1188 if (! found) {
1189 found = fp;
1190 cur_attr = attr;
1191 continue;
1192 }
1193 /* avoid async out and adaptive in if the other method
1194 * supports the same format.
1195 * this is a workaround for the case like
1196 * M-audio audiophile USB.
1197 */
1198 if (attr != cur_attr) {
1199 if ((attr == EP_ATTR_ASYNC &&
1200 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1201 (attr == EP_ATTR_ADAPTIVE &&
1202 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1203 continue;
1204 if ((cur_attr == EP_ATTR_ASYNC &&
1205 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1206 (cur_attr == EP_ATTR_ADAPTIVE &&
1207 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1208 found = fp;
1209 cur_attr = attr;
1210 continue;
1211 }
1212 }
1213 /* find the format with the largest max. packet size */
1214 if (fp->maxpacksize > found->maxpacksize) {
1215 found = fp;
1216 cur_attr = attr;
1217 }
1218 }
1219 return found;
1220}
1221
1222
1223/*
1224 * initialize the picth control and sample rate
1225 */
1226static int init_usb_pitch(struct usb_device *dev, int iface,
1227 struct usb_host_interface *alts,
1228 struct audioformat *fmt)
1229{
1230 unsigned int ep;
1231 unsigned char data[1];
1232 int err;
1233
1234 ep = get_endpoint(alts, 0)->bEndpointAddress;
1235 /* if endpoint has pitch control, enable it */
1236 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1237 data[0] = 1;
1238 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1239 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1240 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1241 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1242 dev->devnum, iface, ep);
1243 return err;
1244 }
1245 }
1246 return 0;
1247}
1248
1249static int init_usb_sample_rate(struct usb_device *dev, int iface,
1250 struct usb_host_interface *alts,
1251 struct audioformat *fmt, int rate)
1252{
1253 unsigned int ep;
1254 unsigned char data[3];
1255 int err;
1256
1257 ep = get_endpoint(alts, 0)->bEndpointAddress;
1258 /* if endpoint has sampling rate control, set it */
1259 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1260 int crate;
1261 data[0] = rate;
1262 data[1] = rate >> 8;
1263 data[2] = rate >> 16;
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 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1267 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1268 dev->devnum, iface, fmt->altsetting, rate, ep);
1269 return err;
1270 }
1271 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1272 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1273 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1274 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1275 dev->devnum, iface, fmt->altsetting, ep);
1276 return 0; /* some devices don't support reading */
1277 }
1278 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1279 if (crate != rate) {
1280 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1281 // runtime->rate = crate;
1282 }
1283 }
1284 return 0;
1285}
1286
1287/*
1288 * find a matching format and set up the interface
1289 */
86e07d34 1290static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1da177e4
LT		 1291{
1292 struct usb_device *dev = subs->dev;
1293 struct usb_host_interface *alts;
1294 struct usb_interface_descriptor *altsd;
1295 struct usb_interface *iface;
1296 unsigned int ep, attr;
1297 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1298 int err;
1299
1300 iface = usb_ifnum_to_if(dev, fmt->iface);
1301 snd_assert(iface, return -EINVAL);
1302 alts = &iface->altsetting[fmt->altset_idx];
1303 altsd = get_iface_desc(alts);
1304 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1305
1306 if (fmt == subs->cur_audiofmt)
1307 return 0;
1308
1309 /* close the old interface */
1310 if (subs->interface >= 0 && subs->interface != fmt->iface) {
5149fe2c
ON		 1311 if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
1312 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
1313 dev->devnum, fmt->iface, fmt->altsetting);
1314 return -EIO;
1315 }
1da177e4
LT		 1316 subs->interface = -1;
1317 subs->format = 0;
1318 }
1319
1320 /* set interface */
1321 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1322 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1323 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1324 dev->devnum, fmt->iface, fmt->altsetting);
1325 return -EIO;
1326 }
1327 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1328 subs->interface = fmt->iface;
1329 subs->format = fmt->altset_idx;
1330 }
1331
1332 /* create a data pipe */
1333 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1334 if (is_playback)
1335 subs->datapipe = usb_sndisocpipe(dev, ep);
1336 else
1337 subs->datapipe = usb_rcvisocpipe(dev, ep);
573567e0
CL		 1338 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1339 get_endpoint(alts, 0)->bInterval >= 1 &&
1340 get_endpoint(alts, 0)->bInterval <= 4)
1341 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1342 else
1343 subs->datainterval = 0;
1da177e4
LT		 1344 subs->syncpipe = subs->syncinterval = 0;
1345 subs->maxpacksize = fmt->maxpacksize;
1346 subs->fill_max = 0;
1347
1348 /* we need a sync pipe in async OUT or adaptive IN mode */
1349 /* check the number of EP, since some devices have broken
1350 * descriptors which fool us. if it has only one EP,
1351 * assume it as adaptive-out or sync-in.
1352 */
1353 attr = fmt->ep_attr & EP_ATTR_MASK;
1354 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1355 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1356 altsd->bNumEndpoints >= 2) {
1357 /* check sync-pipe endpoint */
1358 /* ... and check descriptor size before accessing bSynchAddress
1359 because there is a version of the SB Audigy 2 NX firmware lacking
1360 the audio fields in the endpoint descriptors */
1361 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1362 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1363 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1364 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1365 dev->devnum, fmt->iface, fmt->altsetting);
1366 return -EINVAL;
1367 }
1368 ep = get_endpoint(alts, 1)->bEndpointAddress;
1369 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1370 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1371 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1372 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1373 dev->devnum, fmt->iface, fmt->altsetting);
1374 return -EINVAL;
1375 }
1376 ep &= USB_ENDPOINT_NUMBER_MASK;
1377 if (is_playback)
1378 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1379 else
1380 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1381 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1382 get_endpoint(alts, 1)->bRefresh >= 1 &&
1383 get_endpoint(alts, 1)->bRefresh <= 9)
1384 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1385 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1386 subs->syncinterval = 1;
604cf499
CL		 1387 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1388 get_endpoint(alts, 1)->bInterval <= 16)
1389 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1390 else
1391 subs->syncinterval = 3;
1da177e4
LT		 1392 }
1393
1394 /* always fill max packet size */
1395 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1396 subs->fill_max = 1;
1397
1398 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1399 return err;
1400
1401 subs->cur_audiofmt = fmt;
1402
1403#if 0
1404 printk("setting done: format = %d, rate = %d, channels = %d\n",
1405 fmt->format, fmt->rate, fmt->channels);
1406 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1407 subs->datapipe, subs->syncpipe);
1408#endif
1409
1410 return 0;
1411}
1412
1413/*
1414 * hw_params callback
1415 *
1416 * allocate a buffer and set the given audio format.
1417 *
1418 * so far we use a physically linear buffer although packetize transfer
1419 * doesn't need a continuous area.
1420 * if sg buffer is supported on the later version of alsa, we'll follow
1421 * that.
1422 */
86e07d34
TI		 1423static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1424 struct snd_pcm_hw_params *hw_params)
1da177e4 1425{
88518275 1426 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 1427 struct audioformat *fmt;
1428 unsigned int channels, rate, format;
1429 int ret, changed;
1430
6207e51b
CL		 1431 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1432 params_buffer_bytes(hw_params));
1da177e4
LT		 1433 if (ret < 0)
1434 return ret;
1435
1436 format = params_format(hw_params);
1437 rate = params_rate(hw_params);
1438 channels = params_channels(hw_params);
1439 fmt = find_format(subs, format, rate, channels);
1440 if (! fmt) {
21a3479a
JK		 1441 snd_printd(KERN_DEBUG "cannot set format: format = 0x%x, rate = %d, channels = %d\n",
1442 format, rate, channels);
1da177e4
LT		 1443 return -EINVAL;
1444 }
1445
1446 changed = subs->cur_audiofmt != fmt ||
1447 subs->period_bytes != params_period_bytes(hw_params) ||
1448 subs->cur_rate != rate;
1449 if ((ret = set_format(subs, fmt)) < 0)
1450 return ret;
1451
1452 if (subs->cur_rate != rate) {
1453 struct usb_host_interface *alts;
1454 struct usb_interface *iface;
1455 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1456 alts = &iface->altsetting[fmt->altset_idx];
1457 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1458 if (ret < 0)
1459 return ret;
1460 subs->cur_rate = rate;
1461 }
1462
1463 if (changed) {
1464 /* format changed */
1465 release_substream_urbs(subs, 0);
1466 /* influenced: period_bytes, channels, rate, format, */
1467 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1468 params_rate(hw_params),
1469 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1470 }
1471
1472 return ret;
1473}
1474
1475/*
1476 * hw_free callback
1477 *
1478 * reset the audio format and release the buffer
1479 */
86e07d34 1480static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1da177e4 1481{
88518275 1482 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 1483
1484 subs->cur_audiofmt = NULL;
1485 subs->cur_rate = 0;
1486 subs->period_bytes = 0;
de1b8b93
TI		 1487 if (!subs->stream->chip->shutdown)
1488 release_substream_urbs(subs, 0);
6207e51b 1489 return snd_pcm_free_vmalloc_buffer(substream);
1da177e4
LT		 1490}
1491
1492/*
1493 * prepare callback
1494 *
1495 * only a few subtle things...
1496 */
86e07d34 1497static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 1498{
86e07d34
TI		 1499 struct snd_pcm_runtime *runtime = substream->runtime;
1500 struct snd_usb_substream *subs = runtime->private_data;
1da177e4
LT		 1501
1502 if (! subs->cur_audiofmt) {
1503 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1504 return -ENXIO;
1505 }
1506
1507 /* some unit conversions in runtime */
1508 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1509 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1510
1511 /* reset the pointer */
1da177e4 1512 subs->hwptr_done = 0;
1da177e4
LT		 1513 subs->transfer_done = 0;
1514 subs->phase = 0;
1515
1516 /* clear urbs (to be sure) */
1517 deactivate_urbs(subs, 0, 1);
1518 wait_clear_urbs(subs);
1519
b55bbf06
CL		 1520 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1521 * updates for all URBs would happen at the same time when starting */
1522 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
e4f8e656 1523 subs->ops.prepare = prepare_nodata_playback_urb;
b55bbf06
CL		 1524 return start_urbs(subs, runtime);
1525 } else
1526 return 0;
1da177e4
LT		 1527}
1528
1700f308 1529static struct snd_pcm_hardware snd_usb_hardware =
1da177e4 1530{
49045d3d
CL		 1531 .info = SNDRV_PCM_INFO_MMAP |
1532 SNDRV_PCM_INFO_MMAP_VALID |
1533 SNDRV_PCM_INFO_BATCH |
1534 SNDRV_PCM_INFO_INTERLEAVED |
e4f8e656
CL		 1535 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1536 SNDRV_PCM_INFO_PAUSE,
d31cbbfd 1537 .buffer_bytes_max = 1024 * 1024,
1da177e4 1538 .period_bytes_min = 64,
d31cbbfd 1539 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1540 .periods_min = 2,
1541 .periods_max = 1024,
1542};
1543
1544/*
1545 * h/w constraints
1546 */
1547
1548#ifdef HW_CONST_DEBUG
1549#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1550#else
1551#define hwc_debug(fmt, args...) /**/
1552#endif
1553
86e07d34 1554static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
1da177e4 1555{
86e07d34
TI		 1556 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1557 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1558 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1559
1560 /* check the format */
1561 if (! snd_mask_test(fmts, fp->format)) {
1562 hwc_debug(" > check: no supported format %d\n", fp->format);
1563 return 0;
1564 }
1565 /* check the channels */
1566 if (fp->channels < ct->min || fp->channels > ct->max) {
1567 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1568 return 0;
1569 }
1570 /* check the rate is within the range */
1571 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1572 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1573 return 0;
1574 }
1575 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1576 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1577 return 0;
1578 }
1579 return 1;
1580}
1581
86e07d34
TI		 1582static int hw_rule_rate(struct snd_pcm_hw_params *params,
1583 struct snd_pcm_hw_rule *rule)
1da177e4 1584{
86e07d34 1585 struct snd_usb_substream *subs = rule->private;
1da177e4 1586 struct list_head *p;
86e07d34 1587 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 1588 unsigned int rmin, rmax;
1589 int changed;
1590
1591 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1592 changed = 0;
1593 rmin = rmax = 0;
1594 list_for_each(p, &subs->fmt_list) {
1595 struct audioformat *fp;
1596 fp = list_entry(p, struct audioformat, list);
1597 if (! hw_check_valid_format(params, fp))
1598 continue;
1599 if (changed++) {
1600 if (rmin > fp->rate_min)
1601 rmin = fp->rate_min;
1602 if (rmax < fp->rate_max)
1603 rmax = fp->rate_max;
1604 } else {
1605 rmin = fp->rate_min;
1606 rmax = fp->rate_max;
1607 }
1608 }
1609
1610 if (! changed) {
1611 hwc_debug(" --> get empty\n");
1612 it->empty = 1;
1613 return -EINVAL;
1614 }
1615
1616 changed = 0;
1617 if (it->min < rmin) {
1618 it->min = rmin;
1619 it->openmin = 0;
1620 changed = 1;
1621 }
1622 if (it->max > rmax) {
1623 it->max = rmax;
1624 it->openmax = 0;
1625 changed = 1;
1626 }
1627 if (snd_interval_checkempty(it)) {
1628 it->empty = 1;
1629 return -EINVAL;
1630 }
1631 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1632 return changed;
1633}
1634
1635
86e07d34
TI		 1636static int hw_rule_channels(struct snd_pcm_hw_params *params,
1637 struct snd_pcm_hw_rule *rule)
1da177e4 1638{
86e07d34 1639 struct snd_usb_substream *subs = rule->private;
1da177e4 1640 struct list_head *p;
86e07d34 1641 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1da177e4
LT		 1642 unsigned int rmin, rmax;
1643 int changed;
1644
1645 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1646 changed = 0;
1647 rmin = rmax = 0;
1648 list_for_each(p, &subs->fmt_list) {
1649 struct audioformat *fp;
1650 fp = list_entry(p, struct audioformat, list);
1651 if (! hw_check_valid_format(params, fp))
1652 continue;
1653 if (changed++) {
1654 if (rmin > fp->channels)
1655 rmin = fp->channels;
1656 if (rmax < fp->channels)
1657 rmax = fp->channels;
1658 } else {
1659 rmin = fp->channels;
1660 rmax = fp->channels;
1661 }
1662 }
1663
1664 if (! changed) {
1665 hwc_debug(" --> get empty\n");
1666 it->empty = 1;
1667 return -EINVAL;
1668 }
1669
1670 changed = 0;
1671 if (it->min < rmin) {
1672 it->min = rmin;
1673 it->openmin = 0;
1674 changed = 1;
1675 }
1676 if (it->max > rmax) {
1677 it->max = rmax;
1678 it->openmax = 0;
1679 changed = 1;
1680 }
1681 if (snd_interval_checkempty(it)) {
1682 it->empty = 1;
1683 return -EINVAL;
1684 }
1685 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1686 return changed;
1687}
1688
86e07d34
TI		 1689static int hw_rule_format(struct snd_pcm_hw_params *params,
1690 struct snd_pcm_hw_rule *rule)
1da177e4 1691{
86e07d34 1692 struct snd_usb_substream *subs = rule->private;
1da177e4 1693 struct list_head *p;
86e07d34 1694 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1695 u64 fbits;
1696 u32 oldbits[2];
1697 int changed;
1698
1699 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1700 fbits = 0;
1701 list_for_each(p, &subs->fmt_list) {
1702 struct audioformat *fp;
1703 fp = list_entry(p, struct audioformat, list);
1704 if (! hw_check_valid_format(params, fp))
1705 continue;
1706 fbits |= (1ULL << fp->format);
1707 }
1708
1709 oldbits[0] = fmt->bits[0];
1710 oldbits[1] = fmt->bits[1];
1711 fmt->bits[0] &= (u32)fbits;
1712 fmt->bits[1] &= (u32)(fbits >> 32);
1713 if (! fmt->bits[0] && ! fmt->bits[1]) {
1714 hwc_debug(" --> get empty\n");
1715 return -EINVAL;
1716 }
1717 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1718 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1719 return changed;
1720}
1721
1722#define MAX_MASK 64
1723
1724/*
1725 * check whether the registered audio formats need special hw-constraints
1726 */
86e07d34 1727static int check_hw_params_convention(struct snd_usb_substream *subs)
1da177e4
LT		 1728{
1729 int i;
1730 u32 *channels;
1731 u32 *rates;
1732 u32 cmaster, rmaster;
1733 u32 rate_min = 0, rate_max = 0;
1734 struct list_head *p;
1735 int err = 1;
1736
1737 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1738 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1739
1740 list_for_each(p, &subs->fmt_list) {
1741 struct audioformat *f;
1742 f = list_entry(p, struct audioformat, list);
1743 /* unconventional channels? */
1744 if (f->channels > 32)
1745 goto __out;
1746 /* continuous rate min/max matches? */
1747 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1748 if (rate_min && f->rate_min != rate_min)
1749 goto __out;
1750 if (rate_max && f->rate_max != rate_max)
1751 goto __out;
1752 rate_min = f->rate_min;
1753 rate_max = f->rate_max;
1754 }
1755 /* combination of continuous rates and fixed rates? */
1756 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1757 if (f->rates != rates[f->format])
1758 goto __out;
1759 }
1760 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1761 if (rates[f->format] && rates[f->format] != f->rates)
1762 goto __out;
1763 }
1764 channels[f->format] |= (1 << f->channels);
1765 rates[f->format] |= f->rates;
a79eee8d 1766 /* needs knot? */
918f3a0e 1767 if (f->rates & SNDRV_PCM_RATE_KNOT)
a79eee8d 1768 goto __out;
1da177e4
LT		 1769 }
1770 /* check whether channels and rates match for all formats */
1771 cmaster = rmaster = 0;
1772 for (i = 0; i < MAX_MASK; i++) {
1773 if (cmaster != channels[i] && cmaster && channels[i])
1774 goto __out;
1775 if (rmaster != rates[i] && rmaster && rates[i])
1776 goto __out;
1777 if (channels[i])
1778 cmaster = channels[i];
1779 if (rates[i])
1780 rmaster = rates[i];
1781 }
1782 /* check whether channels match for all distinct rates */
1783 memset(channels, 0, MAX_MASK * sizeof(u32));
1784 list_for_each(p, &subs->fmt_list) {
1785 struct audioformat *f;
1786 f = list_entry(p, struct audioformat, list);
1787 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1788 continue;
1789 for (i = 0; i < 32; i++) {
1790 if (f->rates & (1 << i))
1791 channels[i] |= (1 << f->channels);
1792 }
1793 }
1794 cmaster = 0;
1795 for (i = 0; i < 32; i++) {
1796 if (cmaster != channels[i] && cmaster && channels[i])
1797 goto __out;
1798 if (channels[i])
1799 cmaster = channels[i];
1800 }
1801 err = 0;
1802
1803 __out:
1804 kfree(channels);
1805 kfree(rates);
1806 return err;
1807}
1808
a79eee8d
LR		 1809/*
1810 * If the device supports unusual bit rates, does the request meet these?
1811 */
1812static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1813 struct snd_usb_substream *subs)
1814{
8fec560d
TI		 1815 struct audioformat *fp;
1816 int count = 0, needs_knot = 0;
a79eee8d
LR		 1817 int err;
1818
8fec560d
TI		 1819 list_for_each_entry(fp, &subs->fmt_list, list) {
1820 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1821 return 0;
1822 count += fp->nr_rates;
918f3a0e 1823 if (fp->rates & SNDRV_PCM_RATE_KNOT)
8fec560d 1824 needs_knot = 1;
a79eee8d 1825 }
8fec560d
TI		 1826 if (!needs_knot)
1827 return 0;
1828
1829 subs->rate_list.count = count;
1830 subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
1831 subs->rate_list.mask = 0;
1832 count = 0;
1833 list_for_each_entry(fp, &subs->fmt_list, list) {
1834 int i;
1835 for (i = 0; i < fp->nr_rates; i++)
1836 subs->rate_list.list[count++] = fp->rate_table[i];
1837 }
1838 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1839 &subs->rate_list);
1840 if (err < 0)
1841 return err;
a79eee8d
LR		 1842
1843 return 0;
1844}
1845
1da177e4
LT		 1846
1847/*
1848 * set up the runtime hardware information.
1849 */
1850
86e07d34 1851static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1da177e4
LT		 1852{
1853 struct list_head *p;
1854 int err;
1855
1856 runtime->hw.formats = subs->formats;
1857
1858 runtime->hw.rate_min = 0x7fffffff;
1859 runtime->hw.rate_max = 0;
1860 runtime->hw.channels_min = 256;
1861 runtime->hw.channels_max = 0;
1862 runtime->hw.rates = 0;
1863 /* check min/max rates and channels */
1864 list_for_each(p, &subs->fmt_list) {
1865 struct audioformat *fp;
1866 fp = list_entry(p, struct audioformat, list);
1867 runtime->hw.rates |= fp->rates;
1868 if (runtime->hw.rate_min > fp->rate_min)
1869 runtime->hw.rate_min = fp->rate_min;
1870 if (runtime->hw.rate_max < fp->rate_max)
1871 runtime->hw.rate_max = fp->rate_max;
1872 if (runtime->hw.channels_min > fp->channels)
1873 runtime->hw.channels_min = fp->channels;
1874 if (runtime->hw.channels_max < fp->channels)
1875 runtime->hw.channels_max = fp->channels;
1876 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1877 /* FIXME: there might be more than one audio formats... */
1878 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1879 fp->frame_size;
1880 }
1881 }
1882
1883 /* set the period time minimum 1ms */
81c4899f
TI		 1884 /* FIXME: high-speed mode allows 125us minimum period, but many parts
1885 * in the current code assume the 1ms period.
1886 */
1da177e4 1887 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
81c4899f 1888 1000 * MIN_PACKS_URB,
1da177e4
LT		 1889 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1890
1891 if (check_hw_params_convention(subs)) {
1892 hwc_debug("setting extra hw constraints...\n");
1893 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1894 hw_rule_rate, subs,
1895 SNDRV_PCM_HW_PARAM_FORMAT,
1896 SNDRV_PCM_HW_PARAM_CHANNELS,
1897 -1)) < 0)
1898 return err;
1899 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1900 hw_rule_channels, subs,
1901 SNDRV_PCM_HW_PARAM_FORMAT,
1902 SNDRV_PCM_HW_PARAM_RATE,
1903 -1)) < 0)
1904 return err;
1905 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1906 hw_rule_format, subs,
1907 SNDRV_PCM_HW_PARAM_RATE,
1908 SNDRV_PCM_HW_PARAM_CHANNELS,
1909 -1)) < 0)
1910 return err;
a79eee8d
LR		 1911 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
1912 return err;
1da177e4
LT		 1913 }
1914 return 0;
1915}
1916
1700f308 1917static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1da177e4 1918{
86e07d34
TI		 1919 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1920 struct snd_pcm_runtime *runtime = substream->runtime;
1921 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1922
1923 subs->interface = -1;
1924 subs->format = 0;
1700f308 1925 runtime->hw = snd_usb_hardware;
1da177e4
LT		 1926 runtime->private_data = subs;
1927 subs->pcm_substream = substream;
1928 return setup_hw_info(runtime, subs);
1929}
1930
86e07d34 1931static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1da177e4 1932{
86e07d34
TI		 1933 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1934 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1935
1936 if (subs->interface >= 0) {
1937 usb_set_interface(subs->dev, subs->interface, 0);
1938 subs->interface = -1;
1939 }
1940 subs->pcm_substream = NULL;
1941 return 0;
1942}
1943
86e07d34 1944static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1da177e4 1945{
1700f308 1946 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1da177e4
LT		 1947}
1948
86e07d34 1949static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1950{
1951 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1952}
1953
86e07d34 1954static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1da177e4 1955{
1700f308 1956 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1da177e4
LT		 1957}
1958
86e07d34 1959static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1960{
1961 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1962}
1963
86e07d34 1964static struct snd_pcm_ops snd_usb_playback_ops = {
1da177e4
LT		 1965 .open = snd_usb_playback_open,
1966 .close = snd_usb_playback_close,
1967 .ioctl = snd_pcm_lib_ioctl,
1968 .hw_params = snd_usb_hw_params,
1969 .hw_free = snd_usb_hw_free,
1970 .prepare = snd_usb_pcm_prepare,
b55bbf06 1971 .trigger = snd_usb_pcm_playback_trigger,
1da177e4 1972 .pointer = snd_usb_pcm_pointer,
6207e51b 1973 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1974};
1975
86e07d34 1976static struct snd_pcm_ops snd_usb_capture_ops = {
1da177e4
LT		 1977 .open = snd_usb_capture_open,
1978 .close = snd_usb_capture_close,
1979 .ioctl = snd_pcm_lib_ioctl,
1980 .hw_params = snd_usb_hw_params,
1981 .hw_free = snd_usb_hw_free,
1982 .prepare = snd_usb_pcm_prepare,
b55bbf06 1983 .trigger = snd_usb_pcm_capture_trigger,
1da177e4 1984 .pointer = snd_usb_pcm_pointer,
6207e51b 1985 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1986};
1987
1988
1989
1990/*
1991 * helper functions
1992 */
1993
1994/*
1995 * combine bytes and get an integer value
1996 */
1997unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1998{
1999 switch (size) {
2000 case 1: return *bytes;
2001 case 2: return combine_word(bytes);
2002 case 3: return combine_triple(bytes);
2003 case 4: return combine_quad(bytes);
2004 default: return 0;
2005 }
2006}
2007
2008/*
2009 * parse descriptor buffer and return the pointer starting the given
2010 * descriptor type.
2011 */
2012void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
2013{
2014 u8 *p, *end, *next;
2015
2016 p = descstart;
2017 end = p + desclen;
2018 for (; p < end;) {
2019 if (p[0] < 2)
2020 return NULL;
2021 next = p + p[0];
2022 if (next > end)
2023 return NULL;
2024 if (p[1] == dtype && (!after || (void *)p > after)) {
2025 return p;
2026 }
2027 p = next;
2028 }
2029 return NULL;
2030}
2031
2032/*
2033 * find a class-specified interface descriptor with the given subtype.
2034 */
2035void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
2036{
2037 unsigned char *p = after;
2038
2039 while ((p = snd_usb_find_desc(buffer, buflen, p,
2040 USB_DT_CS_INTERFACE)) != NULL) {
2041 if (p[0] >= 3 && p[2] == dsubtype)
2042 return p;
2043 }
2044 return NULL;
2045}
2046
2047/*
2048 * Wrapper for usb_control_msg().
2049 * Allocates a temp buffer to prevent dmaing from/to the stack.
2050 */
2051int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
2052 __u8 requesttype, __u16 value, __u16 index, void *data,
2053 __u16 size, int timeout)
2054{
2055 int err;
2056 void *buf = NULL;
2057
2058 if (size > 0) {
52978be6 2059 buf = kmemdup(data, size, GFP_KERNEL);
1da177e4
LT		 2060 if (!buf)
2061 return -ENOMEM;
1da177e4
LT		 2062 }
2063 err = usb_control_msg(dev, pipe, request, requesttype,
2064 value, index, buf, size, timeout);
2065 if (size > 0) {
2066 memcpy(data, buf, size);
2067 kfree(buf);
2068 }
2069 return err;
2070}
2071
2072
2073/*
2074 * entry point for linux usb interface
2075 */
2076
2077static int usb_audio_probe(struct usb_interface *intf,
2078 const struct usb_device_id *id);
2079static void usb_audio_disconnect(struct usb_interface *intf);
93521d27
AM		 2080
2081#ifdef CONFIG_PM
f85bf29c
ON		 2082static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message);
2083static int usb_audio_resume(struct usb_interface *intf);
93521d27
AM		 2084#else
2085#define usb_audio_suspend NULL
2086#define usb_audio_resume NULL
2087#endif
1da177e4
LT		 2088
2089static struct usb_device_id usb_audio_ids [] = {
2090#include "usbquirks.h"
2091 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2092 .bInterfaceClass = USB_CLASS_AUDIO,
2093 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
2094 { } /* Terminating entry */
2095};
2096
2097MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2098
2099static struct usb_driver usb_audio_driver = {
1da177e4
LT		 2100 .name = "snd-usb-audio",
2101 .probe = usb_audio_probe,
2102 .disconnect = usb_audio_disconnect,
f85bf29c
ON		 2103 .suspend = usb_audio_suspend,
2104 .resume = usb_audio_resume,
1da177e4
LT		 2105 .id_table = usb_audio_ids,
2106};
2107
2108
727f317a 2109#if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
21a3479a 2110
1da177e4
LT		 2111/*
2112 * proc interface for list the supported pcm formats
2113 */
86e07d34 2114static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2115{
2116 struct list_head *p;
2117 static char *sync_types[4] = {
2118 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2119 };
2120
2121 list_for_each(p, &subs->fmt_list) {
2122 struct audioformat *fp;
2123 fp = list_entry(p, struct audioformat, list);
2124 snd_iprintf(buffer, " Interface %d\n", fp->iface);
2125 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
3f72a30c 2126 snd_iprintf(buffer, " Format: 0x%x\n", fp->format);
1da177e4
LT		 2127 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
2128 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
2129 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2130 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2131 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2132 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2133 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2134 fp->rate_min, fp->rate_max);
2135 } else {
2136 unsigned int i;
2137 snd_iprintf(buffer, " Rates: ");
2138 for (i = 0; i < fp->nr_rates; i++) {
2139 if (i > 0)
2140 snd_iprintf(buffer, ", ");
2141 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2142 }
2143 snd_iprintf(buffer, "\n");
2144 }
2145 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2146 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2147 }
2148}
2149
86e07d34 2150static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2151{
2152 if (subs->running) {
2153 unsigned int i;
2154 snd_iprintf(buffer, " Status: Running\n");
2155 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2156 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2157 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2158 for (i = 0; i < subs->nurbs; i++)
2159 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2160 snd_iprintf(buffer, "]\n");
2161 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2162 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2163 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2164 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2165 : get_high_speed_hz(subs->freqm),
2166 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2167 } else {
2168 snd_iprintf(buffer, " Status: Stop\n");
2169 }
2170}
2171
86e07d34 2172static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 2173{
86e07d34 2174 struct snd_usb_stream *stream = entry->private_data;
1da177e4
LT		 2175
2176 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2177
2178 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2179 snd_iprintf(buffer, "\nPlayback:\n");
2180 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2181 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2182 }
2183 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2184 snd_iprintf(buffer, "\nCapture:\n");
2185 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2186 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2187 }
2188}
2189
86e07d34 2190static void proc_pcm_format_add(struct snd_usb_stream *stream)
1da177e4 2191{
86e07d34 2192 struct snd_info_entry *entry;
1da177e4 2193 char name[32];
86e07d34 2194 struct snd_card *card = stream->chip->card;
1da177e4
LT		 2195
2196 sprintf(name, "stream%d", stream->pcm_index);
2197 if (! snd_card_proc_new(card, name, &entry))
bf850204 2198 snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
1da177e4
LT		 2199}
2200
21a3479a
JK		 2201#else
2202
2203static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
2204{
2205}
2206
2207#endif
1da177e4
LT		 2208
2209/*
2210 * initialize the substream instance.
2211 */
2212
86e07d34 2213static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
1da177e4 2214{
86e07d34 2215 struct snd_usb_substream *subs = &as->substream[stream];
1da177e4
LT		 2216
2217 INIT_LIST_HEAD(&subs->fmt_list);
2218 spin_lock_init(&subs->lock);
2219
2220 subs->stream = as;
2221 subs->direction = stream;
2222 subs->dev = as->chip->dev;
2223 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2224 subs->ops = audio_urb_ops[stream];
2225 else
2226 subs->ops = audio_urb_ops_high_speed[stream];
1da177e4
LT		 2227 snd_pcm_set_ops(as->pcm, stream,
2228 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2229 &snd_usb_playback_ops : &snd_usb_capture_ops);
2230
2231 list_add_tail(&fp->list, &subs->fmt_list);
2232 subs->formats |= 1ULL << fp->format;
2233 subs->endpoint = fp->endpoint;
2234 subs->num_formats++;
2235 subs->fmt_type = fp->fmt_type;
2236}
2237
2238
2239/*
2240 * free a substream
2241 */
86e07d34 2242static void free_substream(struct snd_usb_substream *subs)
1da177e4
LT		 2243{
2244 struct list_head *p, *n;
2245
2246 if (! subs->num_formats)
2247 return; /* not initialized */
2248 list_for_each_safe(p, n, &subs->fmt_list) {
2249 struct audioformat *fp = list_entry(p, struct audioformat, list);
2250 kfree(fp->rate_table);
2251 kfree(fp);
2252 }
8fec560d 2253 kfree(subs->rate_list.list);
1da177e4
LT		 2254}
2255
2256
2257/*
2258 * free a usb stream instance
2259 */
86e07d34 2260static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
1da177e4
LT		 2261{
2262 free_substream(&stream->substream[0]);
2263 free_substream(&stream->substream[1]);
2264 list_del(&stream->list);
2265 kfree(stream);
2266}
2267
86e07d34 2268static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
1da177e4 2269{
86e07d34 2270 struct snd_usb_stream *stream = pcm->private_data;
1da177e4
LT		 2271 if (stream) {
2272 stream->pcm = NULL;
1da177e4
LT		 2273 snd_usb_audio_stream_free(stream);
2274 }
2275}
2276
2277
2278/*
2279 * add this endpoint to the chip instance.
2280 * if a stream with the same endpoint already exists, append to it.
2281 * if not, create a new pcm stream.
2282 */
86e07d34 2283static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
1da177e4
LT		 2284{
2285 struct list_head *p;
86e07d34
TI		 2286 struct snd_usb_stream *as;
2287 struct snd_usb_substream *subs;
2288 struct snd_pcm *pcm;
1da177e4
LT		 2289 int err;
2290
2291 list_for_each(p, &chip->pcm_list) {
86e07d34 2292 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2293 if (as->fmt_type != fp->fmt_type)
2294 continue;
2295 subs = &as->substream[stream];
2296 if (! subs->endpoint)
2297 continue;
2298 if (subs->endpoint == fp->endpoint) {
2299 list_add_tail(&fp->list, &subs->fmt_list);
2300 subs->num_formats++;
2301 subs->formats |= 1ULL << fp->format;
2302 return 0;
2303 }
2304 }
2305 /* look for an empty stream */
2306 list_for_each(p, &chip->pcm_list) {
86e07d34 2307 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2308 if (as->fmt_type != fp->fmt_type)
2309 continue;
2310 subs = &as->substream[stream];
2311 if (subs->endpoint)
2312 continue;
2313 err = snd_pcm_new_stream(as->pcm, stream, 1);
2314 if (err < 0)
2315 return err;
2316 init_substream(as, stream, fp);
2317 return 0;
2318 }
2319
2320 /* create a new pcm */
59feddb2 2321 as = kzalloc(sizeof(*as), GFP_KERNEL);
1da177e4
LT		 2322 if (! as)
2323 return -ENOMEM;
1da177e4
LT		 2324 as->pcm_index = chip->pcm_devs;
2325 as->chip = chip;
2326 as->fmt_type = fp->fmt_type;
2327 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2328 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2329 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2330 &pcm);
2331 if (err < 0) {
2332 kfree(as);
2333 return err;
2334 }
2335 as->pcm = pcm;
2336 pcm->private_data = as;
2337 pcm->private_free = snd_usb_audio_pcm_free;
2338 pcm->info_flags = 0;
2339 if (chip->pcm_devs > 0)
2340 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2341 else
2342 strcpy(pcm->name, "USB Audio");
2343
2344 init_substream(as, stream, fp);
2345
2346 list_add(&as->list, &chip->pcm_list);
2347 chip->pcm_devs++;
2348
2349 proc_pcm_format_add(as);
2350
2351 return 0;
2352}
2353
2354
2355/*
2356 * check if the device uses big-endian samples
2357 */
86e07d34 2358static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1da177e4 2359{
27d10f56
CL		 2360 switch (chip->usb_id) {
2361 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2362 if (fp->endpoint & USB_DIR_IN)
1da177e4 2363 return 1;
27d10f56
CL		 2364 break;
2365 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
f8c78b82
TLM		 2366 if (device_setup[chip->index] == 0x00 ||
2367 fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
2368 return 1;
1da177e4
LT		 2369 }
2370 return 0;
2371}
2372
2373/*
2374 * parse the audio format type I descriptor
2375 * and returns the corresponding pcm format
2376 *
2377 * @dev: usb device
2378 * @fp: audioformat record
2379 * @format: the format tag (wFormatTag)
2380 * @fmt: the format type descriptor
2381 */
86e07d34 2382static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2383 int format, unsigned char *fmt)
2384{
2385 int pcm_format;
2386 int sample_width, sample_bytes;
2387
2388 /* FIXME: correct endianess and sign? */
2389 pcm_format = -1;
2390 sample_width = fmt[6];
2391 sample_bytes = fmt[5];
2392 switch (format) {
2393 case 0: /* some devices don't define this correctly... */
2394 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2395 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2396 /* fall-through */
2397 case USB_AUDIO_FORMAT_PCM:
2398 if (sample_width > sample_bytes * 8) {
2399 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2400 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2401 sample_width, sample_bytes);
2402 }
2403 /* check the format byte size */
2404 switch (fmt[5]) {
2405 case 1:
2406 pcm_format = SNDRV_PCM_FORMAT_S8;
2407 break;
2408 case 2:
27d10f56 2409 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2410 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2411 else
2412 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2413 break;
2414 case 3:
27d10f56 2415 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2416 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2417 else
2418 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2419 break;
2420 case 4:
2421 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2422 break;
2423 default:
2424 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2425 chip->dev->devnum, fp->iface,
2426 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2427 break;
2428 }
2429 break;
2430 case USB_AUDIO_FORMAT_PCM8:
2431 /* Dallas DS4201 workaround */
27d10f56 2432 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4
LT		 2433 pcm_format = SNDRV_PCM_FORMAT_S8;
2434 else
2435 pcm_format = SNDRV_PCM_FORMAT_U8;
2436 break;
2437 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2438 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2439 break;
2440 case USB_AUDIO_FORMAT_ALAW:
2441 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2442 break;
2443 case USB_AUDIO_FORMAT_MU_LAW:
2444 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2445 break;
2446 default:
2447 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2448 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2449 break;
2450 }
2451 return pcm_format;
2452}
2453
2454
2455/*
2456 * parse the format descriptor and stores the possible sample rates
2457 * on the audioformat table.
2458 *
2459 * @dev: usb device
2460 * @fp: audioformat record
2461 * @fmt: the format descriptor
2462 * @offset: the start offset of descriptor pointing the rate type
2463 * (7 for type I and II, 8 for type II)
2464 */
86e07d34 2465static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2466 unsigned char *fmt, int offset)
2467{
2468 int nr_rates = fmt[offset];
918f3a0e 2469
1da177e4
LT		 2470 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2471 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2472 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2473 return -1;
2474 }
2475
2476 if (nr_rates) {
2477 /*
2478 * build the rate table and bitmap flags
2479 */
918f3a0e 2480 int r, idx;
beb60119 2481 unsigned int nonzero_rates = 0;
918f3a0e 2482
1da177e4
LT		 2483 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2484 if (fp->rate_table == NULL) {
2485 snd_printk(KERN_ERR "cannot malloc\n");
2486 return -1;
2487 }
2488
2489 fp->nr_rates = nr_rates;
2490 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2491 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
987411b7
CL		 2492 unsigned int rate = combine_triple(&fmt[idx]);
2493 /* C-Media CM6501 mislabels its 96 kHz altsetting */
2494 if (rate == 48000 && nr_rates == 1 &&
2495 chip->usb_id == USB_ID(0x0d8c, 0x0201) &&
2496 fp->altsetting == 5 && fp->maxpacksize == 392)
2497 rate = 96000;
2498 fp->rate_table[r] = rate;
beb60119 2499 nonzero_rates |= rate;
1da177e4
LT		 2500 if (rate < fp->rate_min)
2501 fp->rate_min = rate;
2502 else if (rate > fp->rate_max)
2503 fp->rate_max = rate;
918f3a0e 2504 fp->rates |= snd_pcm_rate_to_rate_bit(rate);
1da177e4 2505 }
beb60119
GJ		 2506 if (!nonzero_rates) {
2507 hwc_debug("All rates were zero. Skipping format!\n");
2508 return -1;
2509 }
1da177e4
LT		 2510 } else {
2511 /* continuous rates */
2512 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2513 fp->rate_min = combine_triple(&fmt[offset + 1]);
2514 fp->rate_max = combine_triple(&fmt[offset + 4]);
2515 }
2516 return 0;
2517}
2518
2519/*
2520 * parse the format type I and III descriptors
2521 */
86e07d34 2522static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2523 int format, unsigned char *fmt)
2524{
2525 int pcm_format;
2526
2527 if (fmt[3] == USB_FORMAT_TYPE_III) {
2528 /* FIXME: the format type is really IECxxx
2529 * but we give normal PCM format to get the existing
2530 * apps working...
2531 */
cac19c3b
TLM		 2532 switch (chip->usb_id) {
2533
2534 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2535 if (device_setup[chip->index] == 0x00 &&
2536 fp->altsetting == 6)
2537 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
2538 else
2539 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2540 break;
2541 default:
2542 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2543 }
1da177e4 2544 } else {
27d10f56 2545 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2546 if (pcm_format < 0)
2547 return -1;
2548 }
2549 fp->format = pcm_format;
2550 fp->channels = fmt[4];
2551 if (fp->channels < 1) {
2552 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2553 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2554 return -1;
2555 }
27d10f56 2556 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2557}
2558
2559/*
2560 * prase the format type II descriptor
2561 */
86e07d34 2562static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2563 int format, unsigned char *fmt)
2564{
2565 int brate, framesize;
2566 switch (format) {
2567 case USB_AUDIO_FORMAT_AC3:
2568 /* FIXME: there is no AC3 format defined yet */
2569 // fp->format = SNDRV_PCM_FORMAT_AC3;
2570 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2571 break;
2572 case USB_AUDIO_FORMAT_MPEG:
2573 fp->format = SNDRV_PCM_FORMAT_MPEG;
2574 break;
2575 default:
2576 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
27d10f56 2577 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2578 fp->format = SNDRV_PCM_FORMAT_MPEG;
2579 break;
2580 }
2581 fp->channels = 1;
2582 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2583 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2584 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2585 fp->frame_size = framesize;
27d10f56 2586 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2587}
2588
86e07d34 2589static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2590 int format, unsigned char *fmt, int stream)
2591{
2592 int err;
2593
2594 switch (fmt[3]) {
2595 case USB_FORMAT_TYPE_I:
2596 case USB_FORMAT_TYPE_III:
27d10f56 2597 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2598 break;
2599 case USB_FORMAT_TYPE_II:
27d10f56 2600 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2601 break;
2602 default:
2603 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2604 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2605 return -1;
2606 }
2607 fp->fmt_type = fmt[3];
2608 if (err < 0)
2609 return err;
2610#if 1
33159378 2611 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
1da177e4
LT		 2612 /* extigy apparently supports sample rates other than 48k
2613 * but not in ordinary way. so we enable only 48k atm.
2614 */
27d10f56 2615 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
33159378
CL		 2616 chip->usb_id == USB_ID(0x041e, 0x3020) ||
2617 chip->usb_id == USB_ID(0x041e, 0x3061)) {
1da177e4 2618 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2619 fp->rates != SNDRV_PCM_RATE_48000 &&
2620 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2621 return -1;
1da177e4
LT		 2622 }
2623#endif
2624 return 0;
2625}
2626
e311334e
TLM		 2627static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
2628 int iface, int altno);
86e07d34 2629static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
1da177e4
LT		 2630{
2631 struct usb_device *dev;
2632 struct usb_interface *iface;
2633 struct usb_host_interface *alts;
2634 struct usb_interface_descriptor *altsd;
2635 int i, altno, err, stream;
2636 int format;
2637 struct audioformat *fp;
2638 unsigned char *fmt, *csep;
2639
2640 dev = chip->dev;
2641
2642 /* parse the interface's altsettings */
2643 iface = usb_ifnum_to_if(dev, iface_no);
2644 for (i = 0; i < iface->num_altsetting; i++) {
2645 alts = &iface->altsetting[i];
2646 altsd = get_iface_desc(alts);
2647 /* skip invalid one */
2648 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2649 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2650 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2651 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2652 altsd->bNumEndpoints < 1 ||
2653 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2654 continue;
2655 /* must be isochronous */
2656 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2657 USB_ENDPOINT_XFER_ISOC)
2658 continue;
2659 /* check direction */
2660 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2661 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2662 altno = altsd->bAlternateSetting;
e311334e
TLM		 2663
2664 /* audiophile usb: skip altsets incompatible with device_setup
2665 */
2666 if (chip->usb_id == USB_ID(0x0763, 0x2003) &&
2667 audiophile_skip_setting_quirk(chip, iface_no, altno))
2668 continue;
1da177e4
LT		 2669
2670 /* get audio formats */
2671 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2672 if (!fmt) {
2673 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2674 dev->devnum, iface_no, altno);
2675 continue;
2676 }
2677
2678 if (fmt[0] < 7) {
2679 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2680 dev->devnum, iface_no, altno);
2681 continue;
2682 }
2683
2684 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2685
2686 /* get format type */
2687 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2688 if (!fmt) {
2689 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2690 dev->devnum, iface_no, altno);
2691 continue;
2692 }
2693 if (fmt[0] < 8) {
2694 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2695 dev->devnum, iface_no, altno);
2696 continue;
2697 }
2698
2699 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2700 /* Creamware Noah has this descriptor after the 2nd endpoint */
2701 if (!csep && altsd->bNumEndpoints >= 2)
2702 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2703 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
f8c75790 2704 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
faf8d117 2705 " class specific endpoint descriptor\n",
1da177e4 2706 dev->devnum, iface_no, altno);
faf8d117 2707 csep = NULL;
1da177e4
LT		 2708 }
2709
59feddb2 2710 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 2711 if (! fp) {
2712 snd_printk(KERN_ERR "cannot malloc\n");
2713 return -ENOMEM;
2714 }
2715
1da177e4
LT		 2716 fp->iface = iface_no;
2717 fp->altsetting = altno;
2718 fp->altset_idx = i;
2719 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2720 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
1da177e4 2721 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2722 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2723 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2724 * (fp->maxpacksize & 0x7ff);
faf8d117 2725 fp->attributes = csep ? csep[3] : 0;
1da177e4
LT		 2726
2727 /* some quirks for attributes here */
2728
c3f93297
CL		 2729 switch (chip->usb_id) {
2730 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2731 /* Optoplay sets the sample rate attribute although
2732 * it seems not supporting it in fact.
2733 */
2734 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2735 break;
2736 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2737 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2738 /* doesn't set the sample rate attribute, but supports it */
2739 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2740 break;
2741 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2742 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2743 an older model 77d:223) */
1da177e4
LT		 2744 /*
2745 * plantronics headset and Griffin iMic have set adaptive-in
2746 * although it's really not...
2747 */
1da177e4
LT		 2748 fp->ep_attr &= ~EP_ATTR_MASK;
2749 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2750 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2751 else
2752 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2753 break;
1da177e4
LT		 2754 }
2755
2756 /* ok, let's parse further... */
27d10f56 2757 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2758 kfree(fp->rate_table);
2759 kfree(fp);
2760 continue;
2761 }
2762
e311334e 2763 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, altno, fp->endpoint);
1da177e4
LT		 2764 err = add_audio_endpoint(chip, stream, fp);
2765 if (err < 0) {
2766 kfree(fp->rate_table);
2767 kfree(fp);
2768 return err;
2769 }
2770 /* try to set the interface... */
2771 usb_set_interface(chip->dev, iface_no, altno);
2772 init_usb_pitch(chip->dev, iface_no, alts, fp);
2773 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2774 }
2775 return 0;
2776}
2777
2778
2779/*
2780 * disconnect streams
2781 * called from snd_usb_audio_disconnect()
2782 */
ee733397 2783static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2784{
2785 int idx;
86e07d34
TI		 2786 struct snd_usb_stream *as;
2787 struct snd_usb_substream *subs;
1da177e4 2788
86e07d34 2789 as = list_entry(head, struct snd_usb_stream, list);
1da177e4
LT		 2790 for (idx = 0; idx < 2; idx++) {
2791 subs = &as->substream[idx];
2792 if (!subs->num_formats)
2793 return;
2794 release_substream_urbs(subs, 1);
2795 subs->interface = -1;
2796 }
2797}
2798
2799/*
2800 * parse audio control descriptor and create pcm/midi streams
2801 */
86e07d34 2802static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
1da177e4
LT		 2803{
2804 struct usb_device *dev = chip->dev;
2805 struct usb_host_interface *host_iface;
2806 struct usb_interface *iface;
2807 unsigned char *p1;
2808 int i, j;
2809
2810 /* find audiocontrol interface */
2811 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2812 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2813 snd_printk(KERN_ERR "cannot find HEADER\n");
2814 return -EINVAL;
2815 }
2816 if (! p1[7] || p1[0] < 8 + p1[7]) {
2817 snd_printk(KERN_ERR "invalid HEADER\n");
2818 return -EINVAL;
2819 }
2820
2821 /*
2822 * parse all USB audio streaming interfaces
2823 */
2824 for (i = 0; i < p1[7]; i++) {
2825 struct usb_host_interface *alts;
2826 struct usb_interface_descriptor *altsd;
2827 j = p1[8 + i];
2828 iface = usb_ifnum_to_if(dev, j);
2829 if (!iface) {
2830 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2831 dev->devnum, ctrlif, j);
2832 continue;
2833 }
2834 if (usb_interface_claimed(iface)) {
2835 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2836 continue;
2837 }
2838 alts = &iface->altsetting[0];
2839 altsd = get_iface_desc(alts);
2840 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2841 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2842 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2843 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2844 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2845 continue;
2846 }
2847 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2848 continue;
2849 }
2850 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2851 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2852 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2853 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2854 /* skip non-supported classes */
2855 continue;
2856 }
076639f6
CL		 2857 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
2858 snd_printk(KERN_ERR "low speed audio streaming not supported\n");
2859 continue;
2860 }
1da177e4
LT		 2861 if (! parse_audio_endpoints(chip, j)) {
2862 usb_set_interface(dev, j, 0); /* reset the current interface */
2863 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2864 }
2865 }
2866
2867 return 0;
2868}
2869
2870/*
2871 * create a stream for an endpoint/altsetting without proper descriptors
2872 */
86e07d34 2873static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
1da177e4 2874 struct usb_interface *iface,
86e07d34 2875 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2876{
2877 struct audioformat *fp;
2878 struct usb_host_interface *alts;
2879 int stream, err;
b4482a4b 2880 unsigned *rate_table = NULL;
1da177e4 2881
52978be6 2882 fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
1da177e4 2883 if (! fp) {
52978be6 2884 snd_printk(KERN_ERR "cannot memdup\n");
1da177e4
LT		 2885 return -ENOMEM;
2886 }
1da177e4
LT		 2887 if (fp->nr_rates > 0) {
2888 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2889 if (!rate_table) {
2890 kfree(fp);
2891 return -ENOMEM;
2892 }
2893 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2894 fp->rate_table = rate_table;
2895 }
2896
2897 stream = (fp->endpoint & USB_DIR_IN)
2898 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2899 err = add_audio_endpoint(chip, stream, fp);
2900 if (err < 0) {
2901 kfree(fp);
2902 kfree(rate_table);
2903 return err;
2904 }
2905 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2906 fp->altset_idx >= iface->num_altsetting) {
2907 kfree(fp);
2908 kfree(rate_table);
2909 return -EINVAL;
2910 }
2911 alts = &iface->altsetting[fp->altset_idx];
2912 usb_set_interface(chip->dev, fp->iface, 0);
2913 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2914 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2915 return 0;
2916}
2917
2918/*
2919 * create a stream for an interface with proper descriptors
2920 */
86e07d34 2921static int create_standard_audio_quirk(struct snd_usb_audio *chip,
d1bda045 2922 struct usb_interface *iface,
86e07d34 2923 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2924{
2925 struct usb_host_interface *alts;
2926 struct usb_interface_descriptor *altsd;
2927 int err;
2928
2929 alts = &iface->altsetting[0];
2930 altsd = get_iface_desc(alts);
d1bda045 2931 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
1da177e4
LT		 2932 if (err < 0) {
2933 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2934 altsd->bInterfaceNumber, err);
2935 return err;
2936 }
d1bda045
CL		 2937 /* reset the current interface */
2938 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
1da177e4
LT		 2939 return 0;
2940}
2941
2942/*
2943 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2944 * to detect the sample rate is by looking at wMaxPacketSize.
2945 */
86e07d34 2946static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
854af957 2947 struct usb_interface *iface,
86e07d34 2948 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2949{
2950 static const struct audioformat ua_format = {
2951 .format = SNDRV_PCM_FORMAT_S24_3LE,
2952 .channels = 2,
2953 .fmt_type = USB_FORMAT_TYPE_I,
2954 .altsetting = 1,
2955 .altset_idx = 1,
2956 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2957 };
2958 struct usb_host_interface *alts;
2959 struct usb_interface_descriptor *altsd;
2960 struct audioformat *fp;
2961 int stream, err;
2962
2963 /* both PCM and MIDI interfaces have 2 altsettings */
2964 if (iface->num_altsetting != 2)
2965 return -ENXIO;
2966 alts = &iface->altsetting[1];
2967 altsd = get_iface_desc(alts);
2968
2969 if (altsd->bNumEndpoints == 2) {
86e07d34 2970 static const struct snd_usb_midi_endpoint_info ua700_ep = {
1da177e4
LT		 2971 .out_cables = 0x0003,
2972 .in_cables = 0x0003
2973 };
86e07d34 2974 static const struct snd_usb_audio_quirk ua700_quirk = {
1da177e4
LT		 2975 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2976 .data = &ua700_ep
2977 };
86e07d34 2978 static const struct snd_usb_midi_endpoint_info ua25_ep = {
1da177e4
LT		 2979 .out_cables = 0x0001,
2980 .in_cables = 0x0001
2981 };
86e07d34 2982 static const struct snd_usb_audio_quirk ua25_quirk = {
1da177e4
LT		 2983 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2984 .data = &ua25_ep
2985 };
27d10f56 2986 if (chip->usb_id == USB_ID(0x0582, 0x002b))
1da177e4
LT		 2987 return snd_usb_create_midi_interface(chip, iface,
2988 &ua700_quirk);
2989 else
2990 return snd_usb_create_midi_interface(chip, iface,
2991 &ua25_quirk);
2992 }
2993
2994 if (altsd->bNumEndpoints != 1)
2995 return -ENXIO;
2996
2997 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2998 if (!fp)
2999 return -ENOMEM;
3000 memcpy(fp, &ua_format, sizeof(*fp));
3001
3002 fp->iface = altsd->bInterfaceNumber;
3003 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3004 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3005 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3006
3007 switch (fp->maxpacksize) {
3008 case 0x120:
3009 fp->rate_max = fp->rate_min = 44100;
3010 break;
3011 case 0x138:
3012 case 0x140:
3013 fp->rate_max = fp->rate_min = 48000;
3014 break;
3015 case 0x258:
3016 case 0x260:
3017 fp->rate_max = fp->rate_min = 96000;
3018 break;
3019 default:
3020 snd_printk(KERN_ERR "unknown sample rate\n");
3021 kfree(fp);
3022 return -ENXIO;
3023 }
3024
3025 stream = (fp->endpoint & USB_DIR_IN)
3026 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3027 err = add_audio_endpoint(chip, stream, fp);
3028 if (err < 0) {
3029 kfree(fp);
3030 return err;
3031 }
3032 usb_set_interface(chip->dev, fp->iface, 0);
3033 return 0;
3034}
3035
3036/*
3037 * Create a stream for an Edirol UA-1000 interface.
3038 */
86e07d34 3039static int create_ua1000_quirk(struct snd_usb_audio *chip,
854af957 3040 struct usb_interface *iface,
86e07d34 3041 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3042{
3043 static const struct audioformat ua1000_format = {
3044 .format = SNDRV_PCM_FORMAT_S32_LE,
3045 .fmt_type = USB_FORMAT_TYPE_I,
3046 .altsetting = 1,
3047 .altset_idx = 1,
3048 .attributes = 0,
3049 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3050 };
3051 struct usb_host_interface *alts;
3052 struct usb_interface_descriptor *altsd;
3053 struct audioformat *fp;
3054 int stream, err;
3055
3056 if (iface->num_altsetting != 2)
3057 return -ENXIO;
3058 alts = &iface->altsetting[1];
3059 altsd = get_iface_desc(alts);
c4a87ef4 3060 if (alts->extralen != 11 || alts->extra[1] != USB_DT_CS_INTERFACE ||
1da177e4
LT		 3061 altsd->bNumEndpoints != 1)
3062 return -ENXIO;
3063
52978be6 3064 fp = kmemdup(&ua1000_format, sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 3065 if (!fp)
3066 return -ENOMEM;
1da177e4
LT		 3067
3068 fp->channels = alts->extra[4];
3069 fp->iface = altsd->bInterfaceNumber;
3070 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3071 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3072 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3073 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
3074
3075 stream = (fp->endpoint & USB_DIR_IN)
3076 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3077 err = add_audio_endpoint(chip, stream, fp);
3078 if (err < 0) {
3079 kfree(fp);
3080 return err;
3081 }
3082 /* FIXME: playback must be synchronized to capture */
3083 usb_set_interface(chip->dev, fp->iface, 0);
3084 return 0;
3085}
3086
d0b0fac1
BF		 3087/*
3088 * Create a stream for an Edirol UA-101 interface.
3089 * Copy, paste and modify from Edirol UA-1000
3090 */
3091static int create_ua101_quirk(struct snd_usb_audio *chip,
3092 struct usb_interface *iface,
3093 const struct snd_usb_audio_quirk *quirk)
3094{
3095 static const struct audioformat ua101_format = {
3096 .format = SNDRV_PCM_FORMAT_S32_LE,
3097 .fmt_type = USB_FORMAT_TYPE_I,
3098 .altsetting = 1,
3099 .altset_idx = 1,
3100 .attributes = 0,
3101 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3102 };
3103 struct usb_host_interface *alts;
3104 struct usb_interface_descriptor *altsd;
3105 struct audioformat *fp;
3106 int stream, err;
3107
3108 if (iface->num_altsetting != 2)
3109 return -ENXIO;
3110 alts = &iface->altsetting[1];
3111 altsd = get_iface_desc(alts);
3112 if (alts->extralen != 18 || alts->extra[1] != USB_DT_CS_INTERFACE ||
3113 altsd->bNumEndpoints != 1)
3114 return -ENXIO;
3115
3116 fp = kmemdup(&ua101_format, sizeof(*fp), GFP_KERNEL);
3117 if (!fp)
3118 return -ENOMEM;
3119
3120 fp->channels = alts->extra[11];
3121 fp->iface = altsd->bInterfaceNumber;
3122 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3123 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3124 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3125 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[15]);
3126
3127 stream = (fp->endpoint & USB_DIR_IN)
3128 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3129 err = add_audio_endpoint(chip, stream, fp);
3130 if (err < 0) {
3131 kfree(fp);
3132 return err;
3133 }
3134 /* FIXME: playback must be synchronized to capture */
3135 usb_set_interface(chip->dev, fp->iface, 0);
3136 return 0;
3137}
3138
86e07d34 3139static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3140 struct usb_interface *iface,
86e07d34 3141 const struct snd_usb_audio_quirk *quirk);
1da177e4
LT		 3142
3143/*
3144 * handle the quirks for the contained interfaces
3145 */
86e07d34 3146static int create_composite_quirk(struct snd_usb_audio *chip,
1da177e4 3147 struct usb_interface *iface,
86e07d34 3148 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3149{
3150 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
3151 int err;
3152
3153 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
3154 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
3155 if (!iface)
3156 continue;
3157 if (quirk->ifnum != probed_ifnum &&
3158 usb_interface_claimed(iface))
3159 continue;
3160 err = snd_usb_create_quirk(chip, iface, quirk);
3161 if (err < 0)
3162 return err;
3163 if (quirk->ifnum != probed_ifnum)
3164 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
3165 }
3166 return 0;
3167}
3168
86e07d34 3169static int ignore_interface_quirk(struct snd_usb_audio *chip,
854af957 3170 struct usb_interface *iface,
86e07d34 3171 const struct snd_usb_audio_quirk *quirk)
854af957
CL		 3172{
3173 return 0;
3174}
3175
1da177e4
LT		 3176
3177/*
3178 * boot quirks
3179 */
3180
3181#define EXTIGY_FIRMWARE_SIZE_OLD 794
3182#define EXTIGY_FIRMWARE_SIZE_NEW 483
3183
3184static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
3185{
3186 struct usb_host_config *config = dev->actconfig;
3187 int err;
3188
3189 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
3190 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
3191 snd_printdd("sending Extigy boot sequence...\n");
3192 /* Send message to force it to reconnect with full interface. */
3193 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3194 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3195 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3196 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3197 &dev->descriptor, sizeof(dev->descriptor));
3198 config = dev->actconfig;
3199 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3200 err = usb_reset_configuration(dev);
3201 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3202 snd_printdd("extigy_boot: new boot length = %d\n",
3203 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3204 return -ENODEV; /* quit this anyway */
3205 }
3206 return 0;
3207}
3208
3a2f0856
CL		 3209static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3210{
3a2f0856
CL		 3211 u8 buf = 1;
3212
3213 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3214 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3215 0, 0, &buf, 1, 1000);
3216 if (buf == 0) {
3217 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3218 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3219 1, 2000, NULL, 0, 1000);
3220 return -ENODEV;
3221 }
3a2f0856
CL		 3222 return 0;
3223}
3224
e217e30c
SR		 3225/*
3226 * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
3227 * documented in the device's data sheet.
3228 */
3229static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
3230{
3231 u8 buf[4];
3232 buf[0] = 0x20;
3233 buf[1] = value & 0xff;
3234 buf[2] = (value >> 8) & 0xff;
3235 buf[3] = reg;
3236 return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
3237 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
3238 0, 0, &buf, 4, 1000);
3239}
3240
3241static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
3242{
3243 /*
3244 * Enable line-out driver mode, set headphone source to front
3245 * channels, enable stereo mic.
3246 */
3247 return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
3248}
3249
3250
e311334e
TLM		 3251/*
3252 * Setup quirks
3253 */
3254#define AUDIOPHILE_SET 0x01 /* if set, parse device_setup */
3255#define AUDIOPHILE_SET_DTS 0x02 /* if set, enable DTS Digital Output */
3256#define AUDIOPHILE_SET_96K 0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
3257#define AUDIOPHILE_SET_24B 0x08 /* 24bits sample if set, 16bits otherwise */
3258#define AUDIOPHILE_SET_DI 0x10 /* if set, enable Digital Input */
3259#define AUDIOPHILE_SET_MASK 0x1F /* bit mask for setup value */
3260#define AUDIOPHILE_SET_24B_48K_DI 0x19 /* value for 24bits+48KHz+Digital Input */
3261#define AUDIOPHILE_SET_24B_48K_NOTDI 0x09 /* value for 24bits+48KHz+No Digital Input */
3262#define AUDIOPHILE_SET_16B_48K_DI 0x11 /* value for 16bits+48KHz+Digital Input */
3263#define AUDIOPHILE_SET_16B_48K_NOTDI 0x01 /* value for 16bits+48KHz+No Digital Input */
3264
3265static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
3266 int iface, int altno)
3267{
f8c78b82
TLM		 3268 /* Reset ALL ifaces to 0 altsetting.
3269 * Call it for every possible altsetting of every interface.
3270 */
3271 usb_set_interface(chip->dev, iface, 0);
3272
e311334e
TLM		 3273 if (device_setup[chip->index] & AUDIOPHILE_SET) {
3274 if ((device_setup[chip->index] & AUDIOPHILE_SET_DTS)
3275 && altno != 6)
3276 return 1; /* skip this altsetting */
3277 if ((device_setup[chip->index] & AUDIOPHILE_SET_96K)
3278 && altno != 1)
3279 return 1; /* skip this altsetting */
3280 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3281 AUDIOPHILE_SET_24B_48K_DI && altno != 2)
3282 return 1; /* skip this altsetting */
3283 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3284 AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
3285 return 1; /* skip this altsetting */
3286 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3287 AUDIOPHILE_SET_16B_48K_DI && altno != 4)
3288 return 1; /* skip this altsetting */
3289 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3290 AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
3291 return 1; /* skip this altsetting */
3292 }
3293 return 0; /* keep this altsetting */
3294}
1da177e4
LT		 3295
3296/*
3297 * audio-interface quirks
3298 *
3299 * returns zero if no standard audio/MIDI parsing is needed.
3300 * returns a postive value if standard audio/midi interfaces are parsed
3301 * after this.
3302 * returns a negative value at error.
3303 */
86e07d34 3304static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3305 struct usb_interface *iface,
86e07d34 3306 const struct snd_usb_audio_quirk *quirk)
1da177e4 3307{
86e07d34
TI		 3308 typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
3309 const struct snd_usb_audio_quirk *);
854af957
CL		 3310 static const quirk_func_t quirk_funcs[] = {
3311 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3312 [QUIRK_COMPOSITE] = create_composite_quirk,
3313 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3314 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3315 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3316 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3317 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3318 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3319 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
cc7a59bd 3320 [QUIRK_MIDI_CME] = snd_usb_create_midi_interface,
d1bda045 3321 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
854af957
CL		 3322 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3323 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3324 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
d0b0fac1 3325 [QUIRK_AUDIO_EDIROL_UA101] = create_ua101_quirk,
854af957
CL		 3326 };
3327
3328 if (quirk->type < QUIRK_TYPE_COUNT) {
3329 return quirk_funcs[quirk->type](chip, iface, quirk);
3330 } else {
1da177e4
LT		 3331 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3332 return -ENXIO;
3333 }
3334}
3335
3336
3337/*
3338 * common proc files to show the usb device info
3339 */
86e07d34 3340static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3341{
86e07d34 3342 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3343 if (! chip->shutdown)
3344 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3345}
3346
86e07d34 3347static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3348{
86e07d34 3349 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3350 if (! chip->shutdown)
3351 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3352 USB_ID_VENDOR(chip->usb_id),
3353 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3354}
3355
86e07d34 3356static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
1da177e4 3357{
86e07d34 3358 struct snd_info_entry *entry;
1da177e4 3359 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
bf850204 3360 snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
1da177e4 3361 if (! snd_card_proc_new(chip->card, "usbid", &entry))
bf850204 3362 snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
1da177e4
LT		 3363}
3364
3365/*
3366 * free the chip instance
3367 *
3368 * here we have to do not much, since pcm and controls are already freed
3369 *
3370 */
3371
86e07d34 3372static int snd_usb_audio_free(struct snd_usb_audio *chip)
1da177e4 3373{
2a2a5ddd 3374 usb_chip[chip->index] = NULL;
1da177e4
LT		 3375 kfree(chip);
3376 return 0;
3377}
3378
86e07d34 3379static int snd_usb_audio_dev_free(struct snd_device *device)
1da177e4 3380{
86e07d34 3381 struct snd_usb_audio *chip = device->device_data;
1da177e4
LT		 3382 return snd_usb_audio_free(chip);
3383}
3384
3385
3386/*
3387 * create a chip instance and set its names.
3388 */
3389static int snd_usb_audio_create(struct usb_device *dev, int idx,
86e07d34
TI		 3390 const struct snd_usb_audio_quirk *quirk,
3391 struct snd_usb_audio **rchip)
1da177e4 3392{
86e07d34
TI		 3393 struct snd_card *card;
3394 struct snd_usb_audio *chip;
1da177e4
LT		 3395 int err, len;
3396 char component[14];
86e07d34 3397 static struct snd_device_ops ops = {
1da177e4
LT		 3398 .dev_free = snd_usb_audio_dev_free,
3399 };
3400
3401 *rchip = NULL;
3402
076639f6
CL		 3403 if (snd_usb_get_speed(dev) != USB_SPEED_LOW &&
3404 snd_usb_get_speed(dev) != USB_SPEED_FULL &&
1da177e4
LT		 3405 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3406 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3407 return -ENXIO;
3408 }
3409
3410 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3411 if (card == NULL) {
3412 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3413 return -ENOMEM;
3414 }
3415
561b220a 3416 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4
LT		 3417 if (! chip) {
3418 snd_card_free(card);
3419 return -ENOMEM;
3420 }
3421
3422 chip->index = idx;
3423 chip->dev = dev;
3424 chip->card = card;
27d10f56
CL		 3425 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3426 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3427 INIT_LIST_HEAD(&chip->pcm_list);
3428 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3429 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3430
3431 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3432 snd_usb_audio_free(chip);
3433 snd_card_free(card);
3434 return err;
3435 }
3436
3437 strcpy(card->driver, "USB-Audio");
3438 sprintf(component, "USB%04x:%04x",
27d10f56 3439 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3440 snd_component_add(card, component);
3441
3442 /* retrieve the device string as shortname */
3443 if (quirk && quirk->product_name) {
3444 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3445 } else {
3446 if (!dev->descriptor.iProduct ||
3447 usb_string(dev, dev->descriptor.iProduct,
3448 card->shortname, sizeof(card->shortname)) <= 0) {
3449 /* no name available from anywhere, so use ID */
3450 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3451 USB_ID_VENDOR(chip->usb_id),
3452 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3453 }
3454 }
3455
3456 /* retrieve the vendor and device strings as longname */
3457 if (quirk && quirk->vendor_name) {
3458 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3459 } else {
3460 if (dev->descriptor.iManufacturer)
3461 len = usb_string(dev, dev->descriptor.iManufacturer,
3462 card->longname, sizeof(card->longname));
3463 else
3464 len = 0;
3465 /* we don't really care if there isn't any vendor string */
3466 }
3467 if (len > 0)
3468 strlcat(card->longname, " ", sizeof(card->longname));
3469
3470 strlcat(card->longname, card->shortname, sizeof(card->longname));
3471
3472 len = strlcat(card->longname, " at ", sizeof(card->longname));
3473
3474 if (len < sizeof(card->longname))
3475 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3476
3477 strlcat(card->longname,
076639f6
CL		 3478 snd_usb_get_speed(dev) == USB_SPEED_LOW ? ", low speed" :
3479 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" :
3480 ", high speed",
1da177e4
LT		 3481 sizeof(card->longname));
3482
3483 snd_usb_audio_create_proc(chip);
3484
1da177e4
LT		 3485 *rchip = chip;
3486 return 0;
3487}
3488
3489
3490/*
3491 * probe the active usb device
3492 *
3493 * note that this can be called multiple times per a device, when it
3494 * includes multiple audio control interfaces.
3495 *
3496 * thus we check the usb device pointer and creates the card instance
3497 * only at the first time. the successive calls of this function will
3498 * append the pcm interface to the corresponding card.
3499 */
3500static void *snd_usb_audio_probe(struct usb_device *dev,
3501 struct usb_interface *intf,
3502 const struct usb_device_id *usb_id)
3503{
86e07d34 3504 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
1da177e4 3505 int i, err;
86e07d34 3506 struct snd_usb_audio *chip;
1da177e4
LT		 3507 struct usb_host_interface *alts;
3508 int ifnum;
27d10f56 3509 u32 id;
1da177e4
LT		 3510
3511 alts = &intf->altsetting[0];
3512 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3513 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3514 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3515
3516 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3517 goto __err_val;
3518
3519 /* SB Extigy needs special boot-up sequence */
3520 /* if more models come, this will go to the quirk list. */
27d10f56 3521 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3522 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3523 goto __err_val;
1da177e4 3524 }
3a2f0856
CL		 3525 /* SB Audigy 2 NX needs its own boot-up magic, too */
3526 if (id == USB_ID(0x041e, 0x3020)) {
3527 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3528 goto __err_val;
3529 }
1da177e4 3530
e217e30c
SR		 3531 /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
3532 if (id == USB_ID(0x10f5, 0x0200)) {
3533 if (snd_usb_cm106_boot_quirk(dev) < 0)
3534 goto __err_val;
3535 }
3536
1da177e4
LT		 3537 /*
3538 * found a config. now register to ALSA
3539 */
3540
3541 /* check whether it's already registered */
3542 chip = NULL;
12aa7579 3543 mutex_lock(&register_mutex);
1da177e4
LT		 3544 for (i = 0; i < SNDRV_CARDS; i++) {
3545 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3546 if (usb_chip[i]->shutdown) {
3547 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3548 goto __error;
3549 }
3550 chip = usb_chip[i];
3551 break;
3552 }
3553 }
3554 if (! chip) {
3555 /* it's a fresh one.
3556 * now look for an empty slot and create a new card instance
3557 */
1da177e4
LT		 3558 for (i = 0; i < SNDRV_CARDS; i++)
3559 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3560 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3561 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3562 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3563 goto __error;
3564 }
1dcd3ec4 3565 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3566 break;
3567 }
3568 if (! chip) {
3569 snd_printk(KERN_ERR "no available usb audio device\n");
3570 goto __error;
3571 }
3572 }
3573
3574 err = 1; /* continue */
3575 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3576 /* need some special handlings */
3577 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3578 goto __error;
3579 }
3580
3581 if (err > 0) {
3582 /* create normal USB audio interfaces */
3583 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3584 snd_usb_create_mixer(chip, ifnum) < 0) {
3585 goto __error;
3586 }
3587 }
3588
3589 /* we are allowed to call snd_card_register() many times */
3590 if (snd_card_register(chip->card) < 0) {
3591 goto __error;
3592 }
3593
3594 usb_chip[chip->index] = chip;
3595 chip->num_interfaces++;
12aa7579 3596 mutex_unlock(&register_mutex);
1da177e4
LT		 3597 return chip;
3598
3599 __error:
3600 if (chip && !chip->num_interfaces)
3601 snd_card_free(chip->card);
12aa7579 3602 mutex_unlock(&register_mutex);
1da177e4
LT		 3603 __err_val:
3604 return NULL;
3605}
3606
3607/*
3608 * we need to take care of counter, since disconnection can be called also
3609 * many times as well as usb_audio_probe().
3610 */
3611static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3612{
86e07d34
TI		 3613 struct snd_usb_audio *chip;
3614 struct snd_card *card;
1da177e4
LT		 3615 struct list_head *p;
3616
3617 if (ptr == (void *)-1L)
3618 return;
3619
3620 chip = ptr;
3621 card = chip->card;
12aa7579 3622 mutex_lock(&register_mutex);
1da177e4
LT		 3623 chip->shutdown = 1;
3624 chip->num_interfaces--;
3625 if (chip->num_interfaces <= 0) {
3626 snd_card_disconnect(card);
3627 /* release the pcm resources */
3628 list_for_each(p, &chip->pcm_list) {
ee733397 3629 snd_usb_stream_disconnect(p);
1da177e4
LT		 3630 }
3631 /* release the midi resources */
3632 list_for_each(p, &chip->midi_list) {
ee733397 3633 snd_usbmidi_disconnect(p);
1da177e4 3634 }
84957a8a
CL		 3635 /* release mixer resources */
3636 list_for_each(p, &chip->mixer_list) {
3637 snd_usb_mixer_disconnect(p);
3638 }
12aa7579 3639 mutex_unlock(&register_mutex);
c461482c 3640 snd_card_free_when_closed(card);
1da177e4 3641 } else {
12aa7579 3642 mutex_unlock(&register_mutex);
1da177e4
LT		 3643 }
3644}
3645
3646/*
3647 * new 2.5 USB kernel API
3648 */
3649static int usb_audio_probe(struct usb_interface *intf,
3650 const struct usb_device_id *id)
3651{
3652 void *chip;
3653 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3654 if (chip) {
3655 dev_set_drvdata(&intf->dev, chip);
3656 return 0;
3657 } else
3658 return -EIO;
3659}
3660
3661static void usb_audio_disconnect(struct usb_interface *intf)
3662{
3663 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3664 dev_get_drvdata(&intf->dev));
3665}
3666
93521d27 3667#ifdef CONFIG_PM
f85bf29c
ON		 3668static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
3669{
3670 struct snd_usb_audio *chip = dev_get_drvdata(&intf->dev);
3671 struct list_head *p;
3672 struct snd_usb_stream *as;
3673
3674 if (chip == (void *)-1L)
3675 return 0;
3676
3677 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
3678 if (!chip->num_suspended_intf++) {
3679 list_for_each(p, &chip->pcm_list) {
3680 as = list_entry(p, struct snd_usb_stream, list);
3681 snd_pcm_suspend_all(as->pcm);
3682 }
3683 }
3684
3685 return 0;
3686}
3687
3688static int usb_audio_resume(struct usb_interface *intf)
3689{
3690 struct snd_usb_audio *chip = dev_get_drvdata(&intf->dev);
3691
3692 if (chip == (void *)-1L)
3693 return 0;
3694 if (--chip->num_suspended_intf)
3695 return 0;
3696 /*
3697 * ALSA leaves material resumption to user space
3698 * we just notify
3699 */
3700
3701 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
3702
3703 return 0;
3704}
93521d27 3705#endif /* CONFIG_PM */
1da177e4
LT		 3706
3707static int __init snd_usb_audio_init(void)
3708{
3709 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3710 printk(KERN_WARNING "invalid nrpacks value.\n");
3711 return -EINVAL;
3712 }
cf78bbc4 3713 return usb_register(&usb_audio_driver);
1da177e4
LT		 3714}
3715
3716
3717static void __exit snd_usb_audio_cleanup(void)
3718{
3719 usb_deregister(&usb_audio_driver);
3720}
3721
3722module_init(snd_usb_audio_init);
3723module_exit(snd_usb_audio_cleanup);
Linux kernel - Deliverables
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