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[ALSA] bt87x - fix detection of unknown card
[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
LT		 49#include <linux/moduleparam.h>
50#include <sound/core.h>
51#include <sound/info.h>
52#include <sound/pcm.h>
53#include <sound/pcm_params.h>
54#include <sound/initval.h>
55
56#include "usbaudio.h"
57
58
59MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
60MODULE_DESCRIPTION("USB Audio");
61MODULE_LICENSE("GPL");
62MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
63
64
65static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
66static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
67static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
68static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
69static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
70static int nrpacks = 4; /* max. number of packets per urb */
71static int async_unlink = 1;
72
73module_param_array(index, int, NULL, 0444);
74MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
75module_param_array(id, charp, NULL, 0444);
76MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
77module_param_array(enable, bool, NULL, 0444);
78MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
79module_param_array(vid, int, NULL, 0444);
80MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
81module_param_array(pid, int, NULL, 0444);
82MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
71d848ca 83module_param(nrpacks, int, 0644);
1da177e4
LT		 84MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
85module_param(async_unlink, bool, 0444);
86MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
87
88
89/*
90 * debug the h/w constraints
91 */
92/* #define HW_CONST_DEBUG */
93
94
95/*
96 *
97 */
98
99#define MAX_PACKS 10
100#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
15a24c07 101#define MAX_URBS 8
604cf499 102#define SYNC_URBS 4 /* always four urbs for sync */
1da177e4
LT		 103#define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
104
1da177e4
LT		 105struct audioformat {
106 struct list_head list;
107 snd_pcm_format_t format; /* format type */
108 unsigned int channels; /* # channels */
109 unsigned int fmt_type; /* USB audio format type (1-3) */
110 unsigned int frame_size; /* samples per frame for non-audio */
111 int iface; /* interface number */
112 unsigned char altsetting; /* corresponding alternate setting */
113 unsigned char altset_idx; /* array index of altenate setting */
114 unsigned char attributes; /* corresponding attributes of cs endpoint */
115 unsigned char endpoint; /* endpoint */
116 unsigned char ep_attr; /* endpoint attributes */
117 unsigned int maxpacksize; /* max. packet size */
118 unsigned int rates; /* rate bitmasks */
119 unsigned int rate_min, rate_max; /* min/max rates */
120 unsigned int nr_rates; /* number of rate table entries */
121 unsigned int *rate_table; /* rate table */
122};
123
86e07d34
TI		 124struct snd_usb_substream;
125
1da177e4
LT		 126struct snd_urb_ctx {
127 struct urb *urb;
55851f73 128 unsigned int buffer_size; /* size of data buffer, if data URB */
86e07d34 129 struct snd_usb_substream *subs;
1da177e4
LT		 130 int index; /* index for urb array */
131 int packets; /* number of packets per urb */
1da177e4
LT		 132};
133
134struct snd_urb_ops {
86e07d34
TI		 135 int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
136 int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
137 int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
138 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
1da177e4
LT		 139};
140
141struct snd_usb_substream {
86e07d34 142 struct snd_usb_stream *stream;
1da177e4 143 struct usb_device *dev;
86e07d34 144 struct snd_pcm_substream *pcm_substream;
1da177e4
LT		 145 int direction; /* playback or capture */
146 int interface; /* current interface */
147 int endpoint; /* assigned endpoint */
148 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
149 unsigned int cur_rate; /* current rate (for hw_params callback) */
150 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
151 unsigned int format; /* USB data format */
152 unsigned int datapipe; /* the data i/o pipe */
153 unsigned int syncpipe; /* 1 - async out or adaptive in */
573567e0 154 unsigned int datainterval; /* log_2 of data packet interval */
1da177e4
LT		 155 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
156 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
157 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
158 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
159 unsigned int phase; /* phase accumulator */
160 unsigned int maxpacksize; /* max packet size in bytes */
161 unsigned int maxframesize; /* max packet size in frames */
162 unsigned int curpacksize; /* current packet size in bytes (for capture) */
163 unsigned int curframesize; /* current packet size in frames (for capture) */
164 unsigned int fill_max: 1; /* fill max packet size always */
165 unsigned int fmt_type; /* USB audio format type (1-3) */
9624ea81 166 unsigned int packs_per_ms; /* packets per millisecond (for playback) */
1da177e4
LT		 167
168 unsigned int running: 1; /* running status */
169
1da177e4 170 unsigned int hwptr_done; /* processed frame position in the buffer */
1da177e4
LT		 171 unsigned int transfer_done; /* processed frames since last period update */
172 unsigned long active_mask; /* bitmask of active urbs */
173 unsigned long unlink_mask; /* bitmask of unlinked urbs */
174
175 unsigned int nurbs; /* # urbs */
86e07d34
TI		 176 struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
177 struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
55851f73
CL		 178 char *syncbuf; /* sync buffer for all sync URBs */
179 dma_addr_t sync_dma; /* DMA address of syncbuf */
1da177e4
LT		 180
181 u64 formats; /* format bitmasks (all or'ed) */
182 unsigned int num_formats; /* number of supported audio formats (list) */
183 struct list_head fmt_list; /* format list */
184 spinlock_t lock;
185
186 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
187};
188
189
190struct snd_usb_stream {
86e07d34
TI		 191 struct snd_usb_audio *chip;
192 struct snd_pcm *pcm;
1da177e4
LT		 193 int pcm_index;
194 unsigned int fmt_type; /* USB audio format type (1-3) */
86e07d34 195 struct snd_usb_substream substream[2];
1da177e4
LT		 196 struct list_head list;
197};
198
199
200/*
201 * we keep the snd_usb_audio_t instances by ourselves for merging
202 * the all interfaces on the same card as one sound device.
203 */
204
205static DECLARE_MUTEX(register_mutex);
86e07d34 206static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
1da177e4
LT		 207
208
209/*
210 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
211 * this will overflow at approx 524 kHz
212 */
77933d72 213static inline unsigned get_usb_full_speed_rate(unsigned int rate)
1da177e4
LT		 214{
215 return ((rate << 13) + 62) / 125;
216}
217
218/*
219 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
220 * this will overflow at approx 4 MHz
221 */
77933d72 222static inline unsigned get_usb_high_speed_rate(unsigned int rate)
1da177e4
LT		 223{
224 return ((rate << 10) + 62) / 125;
225}
226
227/* convert our full speed USB rate into sampling rate in Hz */
77933d72 228static inline unsigned get_full_speed_hz(unsigned int usb_rate)
1da177e4
LT		 229{
230 return (usb_rate * 125 + (1 << 12)) >> 13;
231}
232
233/* convert our high speed USB rate into sampling rate in Hz */
77933d72 234static inline unsigned get_high_speed_hz(unsigned int usb_rate)
1da177e4
LT		 235{
236 return (usb_rate * 125 + (1 << 9)) >> 10;
237}
238
239
240/*
241 * prepare urb for full speed capture sync pipe
242 *
243 * fill the length and offset of each urb descriptor.
244 * the fixed 10.14 frequency is passed through the pipe.
245 */
86e07d34
TI		 246static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
247 struct snd_pcm_runtime *runtime,
1da177e4
LT		 248 struct urb *urb)
249{
250 unsigned char *cp = urb->transfer_buffer;
86e07d34 251 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 252
1da177e4 253 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 254 urb->iso_frame_desc[0].length = 3;
255 urb->iso_frame_desc[0].offset = 0;
256 cp[0] = subs->freqn >> 2;
257 cp[1] = subs->freqn >> 10;
258 cp[2] = subs->freqn >> 18;
1da177e4
LT		 259 return 0;
260}
261
262/*
263 * prepare urb for high speed capture sync pipe
264 *
265 * fill the length and offset of each urb descriptor.
266 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
267 */
86e07d34
TI		 268static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
269 struct snd_pcm_runtime *runtime,
1da177e4
LT		 270 struct urb *urb)
271{
272 unsigned char *cp = urb->transfer_buffer;
86e07d34 273 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 274
1da177e4 275 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 276 urb->iso_frame_desc[0].length = 4;
277 urb->iso_frame_desc[0].offset = 0;
278 cp[0] = subs->freqn;
279 cp[1] = subs->freqn >> 8;
280 cp[2] = subs->freqn >> 16;
281 cp[3] = subs->freqn >> 24;
1da177e4
LT		 282 return 0;
283}
284
285/*
286 * process after capture sync complete
287 * - nothing to do
288 */
86e07d34
TI		 289static int retire_capture_sync_urb(struct snd_usb_substream *subs,
290 struct snd_pcm_runtime *runtime,
1da177e4
LT		 291 struct urb *urb)
292{
293 return 0;
294}
295
296/*
297 * prepare urb for capture data pipe
298 *
299 * fill the offset and length of each descriptor.
300 *
301 * we use a temporary buffer to write the captured data.
302 * since the length of written data is determined by host, we cannot
303 * write onto the pcm buffer directly... the data is thus copied
304 * later at complete callback to the global buffer.
305 */
86e07d34
TI		 306static int prepare_capture_urb(struct snd_usb_substream *subs,
307 struct snd_pcm_runtime *runtime,
1da177e4
LT		 308 struct urb *urb)
309{
310 int i, offs;
86e07d34 311 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4
LT		 312
313 offs = 0;
314 urb->dev = ctx->subs->dev; /* we need to set this at each time */
1da177e4
LT		 315 for (i = 0; i < ctx->packets; i++) {
316 urb->iso_frame_desc[i].offset = offs;
317 urb->iso_frame_desc[i].length = subs->curpacksize;
318 offs += subs->curpacksize;
1da177e4 319 }
1da177e4 320 urb->transfer_buffer_length = offs;
b263a9bd 321 urb->number_of_packets = ctx->packets;
1da177e4
LT		 322#if 0 // for check
323 if (! urb->bandwidth) {
324 int bustime;
325 bustime = usb_check_bandwidth(urb->dev, urb);
326 if (bustime < 0)
327 return bustime;
328 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
329 usb_claim_bandwidth(urb->dev, urb, bustime, 1);
330 }
331#endif // for check
332 return 0;
333}
334
335/*
336 * process after capture complete
337 *
338 * copy the data from each desctiptor to the pcm buffer, and
339 * update the current position.
340 */
86e07d34
TI		 341static int retire_capture_urb(struct snd_usb_substream *subs,
342 struct snd_pcm_runtime *runtime,
1da177e4
LT		 343 struct urb *urb)
344{
345 unsigned long flags;
346 unsigned char *cp;
347 int i;
348 unsigned int stride, len, oldptr;
b263a9bd 349 int period_elapsed = 0;
1da177e4
LT		 350
351 stride = runtime->frame_bits >> 3;
352
353 for (i = 0; i < urb->number_of_packets; i++) {
354 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
355 if (urb->iso_frame_desc[i].status) {
356 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
357 // continue;
358 }
359 len = urb->iso_frame_desc[i].actual_length / stride;
360 if (! len)
361 continue;
362 /* update the current pointer */
363 spin_lock_irqsave(&subs->lock, flags);
364 oldptr = subs->hwptr_done;
365 subs->hwptr_done += len;
366 if (subs->hwptr_done >= runtime->buffer_size)
367 subs->hwptr_done -= runtime->buffer_size;
368 subs->transfer_done += len;
b263a9bd
CL		 369 if (subs->transfer_done >= runtime->period_size) {
370 subs->transfer_done -= runtime->period_size;
371 period_elapsed = 1;
372 }
1da177e4
LT		 373 spin_unlock_irqrestore(&subs->lock, flags);
374 /* copy a data chunk */
375 if (oldptr + len > runtime->buffer_size) {
376 unsigned int cnt = runtime->buffer_size - oldptr;
377 unsigned int blen = cnt * stride;
378 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
379 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
380 } else {
381 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
382 }
1da177e4 383 }
b263a9bd
CL		 384 if (period_elapsed)
385 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 386 return 0;
387}
388
389
390/*
391 * prepare urb for full speed playback sync pipe
392 *
393 * set up the offset and length to receive the current frequency.
394 */
395
86e07d34
TI		 396static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
397 struct snd_pcm_runtime *runtime,
1da177e4
LT		 398 struct urb *urb)
399{
86e07d34 400 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 401
1da177e4 402 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 403 urb->iso_frame_desc[0].length = 3;
404 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 405 return 0;
406}
407
408/*
409 * prepare urb for high speed playback sync pipe
410 *
411 * set up the offset and length to receive the current frequency.
412 */
413
86e07d34
TI		 414static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
415 struct snd_pcm_runtime *runtime,
1da177e4
LT		 416 struct urb *urb)
417{
86e07d34 418 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 419
1da177e4 420 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 421 urb->iso_frame_desc[0].length = 4;
422 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 423 return 0;
424}
425
426/*
427 * process after full speed playback sync complete
428 *
429 * retrieve the current 10.14 frequency from pipe, and set it.
430 * the value is referred in prepare_playback_urb().
431 */
86e07d34
TI		 432static int retire_playback_sync_urb(struct snd_usb_substream *subs,
433 struct snd_pcm_runtime *runtime,
1da177e4
LT		 434 struct urb *urb)
435{
ca81090a 436 unsigned int f;
1da177e4
LT		 437 unsigned long flags;
438
ca81090a
CL		 439 if (urb->iso_frame_desc[0].status == 0 &&
440 urb->iso_frame_desc[0].actual_length == 3) {
441 f = combine_triple((u8*)urb->transfer_buffer) << 2;
50cdbf15
CL		 442 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
443 spin_lock_irqsave(&subs->lock, flags);
444 subs->freqm = f;
445 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4 446 }
1da177e4
LT		 447 }
448
449 return 0;
450}
451
452/*
453 * process after high speed playback sync complete
454 *
455 * retrieve the current 12.13 frequency from pipe, and set it.
456 * the value is referred in prepare_playback_urb().
457 */
86e07d34
TI		 458static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
459 struct snd_pcm_runtime *runtime,
1da177e4
LT		 460 struct urb *urb)
461{
ca81090a 462 unsigned int f;
1da177e4
LT		 463 unsigned long flags;
464
ca81090a
CL		 465 if (urb->iso_frame_desc[0].status == 0 &&
466 urb->iso_frame_desc[0].actual_length == 4) {
467 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
50cdbf15
CL		 468 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
469 spin_lock_irqsave(&subs->lock, flags);
470 subs->freqm = f;
471 spin_unlock_irqrestore(&subs->lock, flags);
472 }
1da177e4
LT		 473 }
474
475 return 0;
476}
477
b55bbf06
CL		 478/*
479 * Prepare urb for streaming before playback starts.
480 *
481 * We don't care about (or have) any data, so we just send a transfer delimiter.
482 */
86e07d34
TI		 483static int prepare_startup_playback_urb(struct snd_usb_substream *subs,
484 struct snd_pcm_runtime *runtime,
b55bbf06
CL		 485 struct urb *urb)
486{
487 unsigned int i;
86e07d34 488 struct snd_urb_ctx *ctx = urb->context;
b55bbf06
CL		 489
490 urb->dev = ctx->subs->dev;
491 urb->number_of_packets = subs->packs_per_ms;
492 for (i = 0; i < subs->packs_per_ms; ++i) {
493 urb->iso_frame_desc[i].offset = 0;
494 urb->iso_frame_desc[i].length = 0;
495 }
496 urb->transfer_buffer_length = 0;
497 return 0;
498}
499
1da177e4
LT		 500/*
501 * prepare urb for playback data pipe
502 *
7efd8bc8
CL		 503 * Since a URB can handle only a single linear buffer, we must use double
504 * buffering when the data to be transferred overflows the buffer boundary.
505 * To avoid inconsistencies when updating hwptr_done, we use double buffering
506 * for all URBs.
1da177e4 507 */
86e07d34
TI		 508static int prepare_playback_urb(struct snd_usb_substream *subs,
509 struct snd_pcm_runtime *runtime,
1da177e4
LT		 510 struct urb *urb)
511{
512 int i, stride, offs;
513 unsigned int counts;
514 unsigned long flags;
7efd8bc8 515 int period_elapsed = 0;
86e07d34 516 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4
LT		 517
518 stride = runtime->frame_bits >> 3;
519
520 offs = 0;
521 urb->dev = ctx->subs->dev; /* we need to set this at each time */
522 urb->number_of_packets = 0;
523 spin_lock_irqsave(&subs->lock, flags);
524 for (i = 0; i < ctx->packets; i++) {
525 /* calculate the size of a packet */
526 if (subs->fill_max)
527 counts = subs->maxframesize; /* fixed */
528 else {
573567e0
CL		 529 subs->phase = (subs->phase & 0xffff)
530 + (subs->freqm << subs->datainterval);
1da177e4
LT		 531 counts = subs->phase >> 16;
532 if (counts > subs->maxframesize)
533 counts = subs->maxframesize;
534 }
535 /* set up descriptor */
536 urb->iso_frame_desc[i].offset = offs * stride;
537 urb->iso_frame_desc[i].length = counts * stride;
538 offs += counts;
539 urb->number_of_packets++;
7efd8bc8
CL		 540 subs->transfer_done += counts;
541 if (subs->transfer_done >= runtime->period_size) {
542 subs->transfer_done -= runtime->period_size;
543 period_elapsed = 1;
1da177e4 544 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
7efd8bc8
CL		 545 if (subs->transfer_done > 0) {
546 /* FIXME: fill-max mode is not
547 * supported yet */
548 offs -= subs->transfer_done;
549 counts -= subs->transfer_done;
550 urb->iso_frame_desc[i].length =
551 counts * stride;
552 subs->transfer_done = 0;
1da177e4
LT		 553 }
554 i++;
555 if (i < ctx->packets) {
556 /* add a transfer delimiter */
7efd8bc8
CL		 557 urb->iso_frame_desc[i].offset =
558 offs * stride;
1da177e4
LT		 559 urb->iso_frame_desc[i].length = 0;
560 urb->number_of_packets++;
561 }
9624ea81 562 break;
1da177e4 563 }
1da177e4 564 }
9624ea81
CL		 565 /* finish at the frame boundary at/after the period boundary */
566 if (period_elapsed &&
567 (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
568 break;
1da177e4 569 }
7efd8bc8
CL		 570 if (subs->hwptr_done + offs > runtime->buffer_size) {
571 /* err, the transferred area goes over buffer boundary. */
572 unsigned int len = runtime->buffer_size - subs->hwptr_done;
573 memcpy(urb->transfer_buffer,
574 runtime->dma_area + subs->hwptr_done * stride,
575 len * stride);
576 memcpy(urb->transfer_buffer + len * stride,
577 runtime->dma_area,
578 (offs - len) * stride);
1da177e4 579 } else {
7efd8bc8
CL		 580 memcpy(urb->transfer_buffer,
581 runtime->dma_area + subs->hwptr_done * stride,
582 offs * stride);
1da177e4 583 }
7efd8bc8
CL		 584 subs->hwptr_done += offs;
585 if (subs->hwptr_done >= runtime->buffer_size)
586 subs->hwptr_done -= runtime->buffer_size;
1da177e4
LT		 587 spin_unlock_irqrestore(&subs->lock, flags);
588 urb->transfer_buffer_length = offs * stride;
b55bbf06
CL		 589 if (period_elapsed)
590 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 591 return 0;
592}
593
594/*
595 * process after playback data complete
7efd8bc8 596 * - nothing to do
1da177e4 597 */
86e07d34
TI		 598static int retire_playback_urb(struct snd_usb_substream *subs,
599 struct snd_pcm_runtime *runtime,
1da177e4
LT		 600 struct urb *urb)
601{
1da177e4
LT		 602 return 0;
603}
604
605
606/*
607 */
608static struct snd_urb_ops audio_urb_ops[2] = {
609 {
b55bbf06 610 .prepare = prepare_startup_playback_urb,
1da177e4
LT		 611 .retire = retire_playback_urb,
612 .prepare_sync = prepare_playback_sync_urb,
613 .retire_sync = retire_playback_sync_urb,
614 },
615 {
616 .prepare = prepare_capture_urb,
617 .retire = retire_capture_urb,
618 .prepare_sync = prepare_capture_sync_urb,
619 .retire_sync = retire_capture_sync_urb,
620 },
621};
622
623static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
624 {
b55bbf06 625 .prepare = prepare_startup_playback_urb,
1da177e4
LT		 626 .retire = retire_playback_urb,
627 .prepare_sync = prepare_playback_sync_urb_hs,
628 .retire_sync = retire_playback_sync_urb_hs,
629 },
630 {
631 .prepare = prepare_capture_urb,
632 .retire = retire_capture_urb,
633 .prepare_sync = prepare_capture_sync_urb_hs,
634 .retire_sync = retire_capture_sync_urb,
635 },
636};
637
638/*
639 * complete callback from data urb
640 */
641static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
642{
86e07d34
TI		 643 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
644 struct snd_usb_substream *subs = ctx->subs;
645 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 646 int err = 0;
647
648 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
649 ! subs->running || /* can be stopped during retire callback */
650 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
651 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
652 clear_bit(ctx->index, &subs->active_mask);
653 if (err < 0) {
654 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
655 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
656 }
657 }
658}
659
660
661/*
662 * complete callback from sync urb
663 */
664static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
665{
86e07d34
TI		 666 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
667 struct snd_usb_substream *subs = ctx->subs;
668 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 669 int err = 0;
670
671 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
672 ! subs->running || /* can be stopped during retire callback */
673 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
674 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
675 clear_bit(ctx->index + 16, &subs->active_mask);
676 if (err < 0) {
677 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
678 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
679 }
680 }
681}
682
683
6207e51b 684/* get the physical page pointer at the given offset */
86e07d34 685static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
6207e51b
CL		 686 unsigned long offset)
687{
688 void *pageptr = subs->runtime->dma_area + offset;
689 return vmalloc_to_page(pageptr);
690}
691
692/* allocate virtual buffer; may be called more than once */
86e07d34 693static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
6207e51b 694{
86e07d34 695 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b
CL		 696 if (runtime->dma_area) {
697 if (runtime->dma_bytes >= size)
698 return 0; /* already large enough */
b1d5776d 699 vfree(runtime->dma_area);
6207e51b 700 }
b1d5776d 701 runtime->dma_area = vmalloc(size);
6207e51b
CL		 702 if (! runtime->dma_area)
703 return -ENOMEM;
704 runtime->dma_bytes = size;
705 return 0;
706}
707
708/* free virtual buffer; may be called more than once */
86e07d34 709static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
6207e51b 710{
86e07d34 711 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b 712 if (runtime->dma_area) {
b1d5776d 713 vfree(runtime->dma_area);
6207e51b
CL		 714 runtime->dma_area = NULL;
715 }
716 return 0;
717}
718
719
1da177e4
LT		 720/*
721 * unlink active urbs.
722 */
86e07d34 723static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
1da177e4
LT		 724{
725 unsigned int i;
726 int async;
727
728 subs->running = 0;
729
730 if (!force && subs->stream->chip->shutdown) /* to be sure... */
731 return -EBADFD;
732
733 async = !can_sleep && async_unlink;
734
735 if (! async && in_interrupt())
736 return 0;
737
738 for (i = 0; i < subs->nurbs; i++) {
739 if (test_bit(i, &subs->active_mask)) {
740 if (! test_and_set_bit(i, &subs->unlink_mask)) {
741 struct urb *u = subs->dataurb[i].urb;
b375a049 742 if (async)
1da177e4 743 usb_unlink_urb(u);
b375a049 744 else
1da177e4
LT		 745 usb_kill_urb(u);
746 }
747 }
748 }
749 if (subs->syncpipe) {
750 for (i = 0; i < SYNC_URBS; i++) {
751 if (test_bit(i+16, &subs->active_mask)) {
752 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
753 struct urb *u = subs->syncurb[i].urb;
b375a049 754 if (async)
1da177e4 755 usb_unlink_urb(u);
b375a049 756 else
1da177e4
LT		 757 usb_kill_urb(u);
758 }
759 }
760 }
761 }
762 return 0;
763}
764
765
766/*
767 * set up and start data/sync urbs
768 */
86e07d34 769static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
1da177e4
LT		 770{
771 unsigned int i;
772 int err;
773
774 if (subs->stream->chip->shutdown)
775 return -EBADFD;
776
777 for (i = 0; i < subs->nurbs; i++) {
778 snd_assert(subs->dataurb[i].urb, return -EINVAL);
779 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
780 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
781 goto __error;
782 }
783 }
784 if (subs->syncpipe) {
785 for (i = 0; i < SYNC_URBS; i++) {
786 snd_assert(subs->syncurb[i].urb, return -EINVAL);
787 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
788 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
789 goto __error;
790 }
791 }
792 }
793
794 subs->active_mask = 0;
795 subs->unlink_mask = 0;
796 subs->running = 1;
797 for (i = 0; i < subs->nurbs; i++) {
798 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
799 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
800 goto __error;
801 }
802 set_bit(i, &subs->active_mask);
803 }
804 if (subs->syncpipe) {
805 for (i = 0; i < SYNC_URBS; i++) {
806 if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
807 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
808 goto __error;
809 }
810 set_bit(i + 16, &subs->active_mask);
811 }
812 }
813 return 0;
814
815 __error:
816 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
817 deactivate_urbs(subs, 0, 0);
818 return -EPIPE;
819}
820
821
822/*
823 * wait until all urbs are processed.
824 */
86e07d34 825static int wait_clear_urbs(struct snd_usb_substream *subs)
1da177e4 826{
b27c187f 827 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 828 unsigned int i;
829 int alive;
830
831 do {
832 alive = 0;
833 for (i = 0; i < subs->nurbs; i++) {
834 if (test_bit(i, &subs->active_mask))
835 alive++;
836 }
837 if (subs->syncpipe) {
838 for (i = 0; i < SYNC_URBS; i++) {
839 if (test_bit(i + 16, &subs->active_mask))
840 alive++;
841 }
842 }
843 if (! alive)
844 break;
8433a509 845 schedule_timeout_uninterruptible(1);
b27c187f 846 } while (time_before(jiffies, end_time));
1da177e4
LT		 847 if (alive)
848 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
849 return 0;
850}
851
852
853/*
854 * return the current pcm pointer. just return the hwptr_done value.
855 */
86e07d34 856static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 857{
86e07d34 858 struct snd_usb_substream *subs;
daa150ef
CL		 859 snd_pcm_uframes_t hwptr_done;
860
86e07d34 861 subs = (struct snd_usb_substream *)substream->runtime->private_data;
daa150ef
CL		 862 spin_lock(&subs->lock);
863 hwptr_done = subs->hwptr_done;
864 spin_unlock(&subs->lock);
865 return hwptr_done;
1da177e4
LT		 866}
867
868
869/*
b55bbf06 870 * start/stop playback substream
1da177e4 871 */
86e07d34 872static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
b55bbf06 873 int cmd)
1da177e4 874{
86e07d34 875 struct snd_usb_substream *subs = substream->runtime->private_data;
b55bbf06
CL		 876
877 switch (cmd) {
878 case SNDRV_PCM_TRIGGER_START:
879 subs->ops.prepare = prepare_playback_urb;
880 return 0;
881 case SNDRV_PCM_TRIGGER_STOP:
882 return deactivate_urbs(subs, 0, 0);
883 default:
884 return -EINVAL;
885 }
886}
887
888/*
889 * start/stop capture substream
890 */
86e07d34 891static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
b55bbf06
CL		 892 int cmd)
893{
86e07d34 894 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 895
896 switch (cmd) {
897 case SNDRV_PCM_TRIGGER_START:
b55bbf06 898 return start_urbs(subs, substream->runtime);
1da177e4 899 case SNDRV_PCM_TRIGGER_STOP:
b55bbf06 900 return deactivate_urbs(subs, 0, 0);
1da177e4 901 default:
b55bbf06 902 return -EINVAL;
1da177e4 903 }
1da177e4
LT		 904}
905
906
907/*
908 * release a urb data
909 */
86e07d34 910static void release_urb_ctx(struct snd_urb_ctx *u)
1da177e4
LT		 911{
912 if (u->urb) {
55851f73
CL		 913 if (u->buffer_size)
914 usb_buffer_free(u->subs->dev, u->buffer_size,
915 u->urb->transfer_buffer,
916 u->urb->transfer_dma);
1da177e4
LT		 917 usb_free_urb(u->urb);
918 u->urb = NULL;
919 }
1da177e4
LT		 920}
921
922/*
923 * release a substream
924 */
86e07d34 925static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1da177e4
LT		 926{
927 int i;
928
929 /* stop urbs (to be sure) */
930 deactivate_urbs(subs, force, 1);
931 wait_clear_urbs(subs);
932
933 for (i = 0; i < MAX_URBS; i++)
934 release_urb_ctx(&subs->dataurb[i]);
935 for (i = 0; i < SYNC_URBS; i++)
936 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 937 usb_buffer_free(subs->dev, SYNC_URBS * 4,
938 subs->syncbuf, subs->sync_dma);
939 subs->syncbuf = NULL;
1da177e4
LT		 940 subs->nurbs = 0;
941}
942
943/*
944 * initialize a substream for plaback/capture
945 */
86e07d34 946static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1da177e4
LT		 947 unsigned int rate, unsigned int frame_bits)
948{
949 unsigned int maxsize, n, i;
950 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
a93bf990 951 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 952
953 /* calculate the frequency in 16.16 format */
954 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
955 subs->freqn = get_usb_full_speed_rate(rate);
956 else
957 subs->freqn = get_usb_high_speed_rate(rate);
958 subs->freqm = subs->freqn;
573567e0
CL		 959 /* calculate max. frequency */
960 if (subs->maxpacksize) {
961 /* whatever fits into a max. size packet */
1da177e4 962 maxsize = subs->maxpacksize;
573567e0
CL		 963 subs->freqmax = (maxsize / (frame_bits >> 3))
964 << (16 - subs->datainterval);
965 } else {
966 /* no max. packet size: just take 25% higher than nominal */
967 subs->freqmax = subs->freqn + (subs->freqn >> 2);
968 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
969 >> (16 - subs->datainterval);
1da177e4 970 }
573567e0 971 subs->phase = 0;
1da177e4
LT		 972
973 if (subs->fill_max)
974 subs->curpacksize = subs->maxpacksize;
975 else
976 subs->curpacksize = maxsize;
977
a93bf990
CL		 978 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
979 packs_per_ms = 8 >> subs->datainterval;
980 else
981 packs_per_ms = 1;
9624ea81 982 subs->packs_per_ms = packs_per_ms;
a93bf990 983
71d848ca 984 if (is_playback) {
1da177e4 985 urb_packs = nrpacks;
71d848ca
CL		 986 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
987 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
988 } else
15a24c07 989 urb_packs = 1;
a93bf990 990 urb_packs *= packs_per_ms;
1da177e4 991
1da177e4 992 /* decide how many packets to be used */
15a24c07 993 if (is_playback) {
d6db392e
CL		 994 unsigned int minsize;
995 /* determine how small a packet can be */
996 minsize = (subs->freqn >> (16 - subs->datainterval))
997 * (frame_bits >> 3);
7efd8bc8 998 /* with sync from device, assume it can be 12% lower */
d6db392e 999 if (subs->syncpipe)
7efd8bc8 1000 minsize -= minsize >> 3;
d6db392e
CL		 1001 minsize = max(minsize, 1u);
1002 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990
CL		 1003 /* round up to multiple of packs_per_ms */
1004 total_packs = (total_packs + packs_per_ms - 1)
1005 & ~(packs_per_ms - 1);
1006 /* we need at least two URBs for queueing */
1007 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
1008 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
15a24c07
CL		 1009 } else {
1010 total_packs = MAX_URBS * urb_packs;
1011 }
1da177e4
LT		 1012 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1013 if (subs->nurbs > MAX_URBS) {
1014 /* too much... */
1015 subs->nurbs = MAX_URBS;
1016 total_packs = MAX_URBS * urb_packs;
1017 }
1018 n = total_packs;
1019 for (i = 0; i < subs->nurbs; i++) {
1020 npacks[i] = n > urb_packs ? urb_packs : n;
1021 n -= urb_packs;
1022 }
1023 if (subs->nurbs <= 1) {
1024 /* too little - we need at least two packets
1025 * to ensure contiguous playback/capture
1026 */
1027 subs->nurbs = 2;
1028 npacks[0] = (total_packs + 1) / 2;
1029 npacks[1] = total_packs - npacks[0];
a93bf990 1030 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1da177e4
LT		 1031 /* the last packet is too small.. */
1032 if (subs->nurbs > 2) {
1033 /* merge to the first one */
1034 npacks[0] += npacks[subs->nurbs - 1];
1035 subs->nurbs--;
1036 } else {
1037 /* divide to two */
1038 subs->nurbs = 2;
1039 npacks[0] = (total_packs + 1) / 2;
1040 npacks[1] = total_packs - npacks[0];
1041 }
1042 }
1043
1044 /* allocate and initialize data urbs */
1045 for (i = 0; i < subs->nurbs; i++) {
86e07d34 1046 struct snd_urb_ctx *u = &subs->dataurb[i];
1da177e4
LT		 1047 u->index = i;
1048 u->subs = subs;
1da177e4 1049 u->packets = npacks[i];
55851f73 1050 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1051 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1052 u->packets++; /* for transfer delimiter */
1da177e4 1053 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
55851f73
CL		 1054 if (! u->urb)
1055 goto out_of_memory;
1056 u->urb->transfer_buffer =
1057 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1058 &u->urb->transfer_dma);
1059 if (! u->urb->transfer_buffer)
1060 goto out_of_memory;
1da177e4 1061 u->urb->pipe = subs->datapipe;
55851f73 1062 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1063 u->urb->interval = 1 << subs->datainterval;
1da177e4 1064 u->urb->context = u;
3527a008 1065 u->urb->complete = snd_complete_urb;
1da177e4
LT		 1066 }
1067
1068 if (subs->syncpipe) {
1069 /* allocate and initialize sync urbs */
55851f73
CL		 1070 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1071 GFP_KERNEL, &subs->sync_dma);
1072 if (! subs->syncbuf)
1073 goto out_of_memory;
1da177e4 1074 for (i = 0; i < SYNC_URBS; i++) {
86e07d34 1075 struct snd_urb_ctx *u = &subs->syncurb[i];
1da177e4
LT		 1076 u->index = i;
1077 u->subs = subs;
ca81090a
CL		 1078 u->packets = 1;
1079 u->urb = usb_alloc_urb(1, GFP_KERNEL);
55851f73
CL		 1080 if (! u->urb)
1081 goto out_of_memory;
ca81090a 1082 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1083 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1084 u->urb->transfer_buffer_length = 4;
1da177e4 1085 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1086 u->urb->transfer_flags = URB_ISO_ASAP |
1087 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1088 u->urb->number_of_packets = 1;
1149a64f 1089 u->urb->interval = 1 << subs->syncinterval;
1da177e4 1090 u->urb->context = u;
3527a008 1091 u->urb->complete = snd_complete_sync_urb;
1da177e4
LT		 1092 }
1093 }
1094 return 0;
55851f73
CL		 1095
1096out_of_memory:
1097 release_substream_urbs(subs, 0);
1098 return -ENOMEM;
1da177e4
LT		 1099}
1100
1101
1102/*
1103 * find a matching audio format
1104 */
86e07d34 1105static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1da177e4
LT		 1106 unsigned int rate, unsigned int channels)
1107{
1108 struct list_head *p;
1109 struct audioformat *found = NULL;
1110 int cur_attr = 0, attr;
1111
1112 list_for_each(p, &subs->fmt_list) {
1113 struct audioformat *fp;
1114 fp = list_entry(p, struct audioformat, list);
1115 if (fp->format != format || fp->channels != channels)
1116 continue;
1117 if (rate < fp->rate_min || rate > fp->rate_max)
1118 continue;
1119 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1120 unsigned int i;
1121 for (i = 0; i < fp->nr_rates; i++)
1122 if (fp->rate_table[i] == rate)
1123 break;
1124 if (i >= fp->nr_rates)
1125 continue;
1126 }
1127 attr = fp->ep_attr & EP_ATTR_MASK;
1128 if (! found) {
1129 found = fp;
1130 cur_attr = attr;
1131 continue;
1132 }
1133 /* avoid async out and adaptive in if the other method
1134 * supports the same format.
1135 * this is a workaround for the case like
1136 * M-audio audiophile USB.
1137 */
1138 if (attr != cur_attr) {
1139 if ((attr == EP_ATTR_ASYNC &&
1140 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1141 (attr == EP_ATTR_ADAPTIVE &&
1142 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1143 continue;
1144 if ((cur_attr == EP_ATTR_ASYNC &&
1145 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1146 (cur_attr == EP_ATTR_ADAPTIVE &&
1147 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1148 found = fp;
1149 cur_attr = attr;
1150 continue;
1151 }
1152 }
1153 /* find the format with the largest max. packet size */
1154 if (fp->maxpacksize > found->maxpacksize) {
1155 found = fp;
1156 cur_attr = attr;
1157 }
1158 }
1159 return found;
1160}
1161
1162
1163/*
1164 * initialize the picth control and sample rate
1165 */
1166static int init_usb_pitch(struct usb_device *dev, int iface,
1167 struct usb_host_interface *alts,
1168 struct audioformat *fmt)
1169{
1170 unsigned int ep;
1171 unsigned char data[1];
1172 int err;
1173
1174 ep = get_endpoint(alts, 0)->bEndpointAddress;
1175 /* if endpoint has pitch control, enable it */
1176 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1177 data[0] = 1;
1178 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1179 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1180 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1181 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1182 dev->devnum, iface, ep);
1183 return err;
1184 }
1185 }
1186 return 0;
1187}
1188
1189static int init_usb_sample_rate(struct usb_device *dev, int iface,
1190 struct usb_host_interface *alts,
1191 struct audioformat *fmt, int rate)
1192{
1193 unsigned int ep;
1194 unsigned char data[3];
1195 int err;
1196
1197 ep = get_endpoint(alts, 0)->bEndpointAddress;
1198 /* if endpoint has sampling rate control, set it */
1199 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1200 int crate;
1201 data[0] = rate;
1202 data[1] = rate >> 8;
1203 data[2] = rate >> 16;
1204 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1205 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1206 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1207 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1208 dev->devnum, iface, fmt->altsetting, rate, ep);
1209 return err;
1210 }
1211 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1212 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1213 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1214 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1215 dev->devnum, iface, fmt->altsetting, ep);
1216 return 0; /* some devices don't support reading */
1217 }
1218 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1219 if (crate != rate) {
1220 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1221 // runtime->rate = crate;
1222 }
1223 }
1224 return 0;
1225}
1226
1227/*
1228 * find a matching format and set up the interface
1229 */
86e07d34 1230static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1da177e4
LT		 1231{
1232 struct usb_device *dev = subs->dev;
1233 struct usb_host_interface *alts;
1234 struct usb_interface_descriptor *altsd;
1235 struct usb_interface *iface;
1236 unsigned int ep, attr;
1237 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1238 int err;
1239
1240 iface = usb_ifnum_to_if(dev, fmt->iface);
1241 snd_assert(iface, return -EINVAL);
1242 alts = &iface->altsetting[fmt->altset_idx];
1243 altsd = get_iface_desc(alts);
1244 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1245
1246 if (fmt == subs->cur_audiofmt)
1247 return 0;
1248
1249 /* close the old interface */
1250 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1251 usb_set_interface(subs->dev, subs->interface, 0);
1252 subs->interface = -1;
1253 subs->format = 0;
1254 }
1255
1256 /* set interface */
1257 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1258 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1259 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1260 dev->devnum, fmt->iface, fmt->altsetting);
1261 return -EIO;
1262 }
1263 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1264 subs->interface = fmt->iface;
1265 subs->format = fmt->altset_idx;
1266 }
1267
1268 /* create a data pipe */
1269 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1270 if (is_playback)
1271 subs->datapipe = usb_sndisocpipe(dev, ep);
1272 else
1273 subs->datapipe = usb_rcvisocpipe(dev, ep);
573567e0
CL		 1274 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1275 get_endpoint(alts, 0)->bInterval >= 1 &&
1276 get_endpoint(alts, 0)->bInterval <= 4)
1277 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1278 else
1279 subs->datainterval = 0;
1da177e4
LT		 1280 subs->syncpipe = subs->syncinterval = 0;
1281 subs->maxpacksize = fmt->maxpacksize;
1282 subs->fill_max = 0;
1283
1284 /* we need a sync pipe in async OUT or adaptive IN mode */
1285 /* check the number of EP, since some devices have broken
1286 * descriptors which fool us. if it has only one EP,
1287 * assume it as adaptive-out or sync-in.
1288 */
1289 attr = fmt->ep_attr & EP_ATTR_MASK;
1290 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1291 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1292 altsd->bNumEndpoints >= 2) {
1293 /* check sync-pipe endpoint */
1294 /* ... and check descriptor size before accessing bSynchAddress
1295 because there is a version of the SB Audigy 2 NX firmware lacking
1296 the audio fields in the endpoint descriptors */
1297 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1298 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1299 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1300 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1301 dev->devnum, fmt->iface, fmt->altsetting);
1302 return -EINVAL;
1303 }
1304 ep = get_endpoint(alts, 1)->bEndpointAddress;
1305 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1306 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1307 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1308 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1309 dev->devnum, fmt->iface, fmt->altsetting);
1310 return -EINVAL;
1311 }
1312 ep &= USB_ENDPOINT_NUMBER_MASK;
1313 if (is_playback)
1314 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1315 else
1316 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1317 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1318 get_endpoint(alts, 1)->bRefresh >= 1 &&
1319 get_endpoint(alts, 1)->bRefresh <= 9)
1320 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1321 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1322 subs->syncinterval = 1;
604cf499
CL		 1323 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1324 get_endpoint(alts, 1)->bInterval <= 16)
1325 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1326 else
1327 subs->syncinterval = 3;
1da177e4
LT		 1328 }
1329
1330 /* always fill max packet size */
1331 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1332 subs->fill_max = 1;
1333
1334 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1335 return err;
1336
1337 subs->cur_audiofmt = fmt;
1338
1339#if 0
1340 printk("setting done: format = %d, rate = %d, channels = %d\n",
1341 fmt->format, fmt->rate, fmt->channels);
1342 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1343 subs->datapipe, subs->syncpipe);
1344#endif
1345
1346 return 0;
1347}
1348
1349/*
1350 * hw_params callback
1351 *
1352 * allocate a buffer and set the given audio format.
1353 *
1354 * so far we use a physically linear buffer although packetize transfer
1355 * doesn't need a continuous area.
1356 * if sg buffer is supported on the later version of alsa, we'll follow
1357 * that.
1358 */
86e07d34
TI		 1359static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1360 struct snd_pcm_hw_params *hw_params)
1da177e4 1361{
86e07d34 1362 struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
1da177e4
LT		 1363 struct audioformat *fmt;
1364 unsigned int channels, rate, format;
1365 int ret, changed;
1366
6207e51b
CL		 1367 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1368 params_buffer_bytes(hw_params));
1da177e4
LT		 1369 if (ret < 0)
1370 return ret;
1371
1372 format = params_format(hw_params);
1373 rate = params_rate(hw_params);
1374 channels = params_channels(hw_params);
1375 fmt = find_format(subs, format, rate, channels);
1376 if (! fmt) {
1377 snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
1378 snd_pcm_format_name(format), rate, channels);
1379 return -EINVAL;
1380 }
1381
1382 changed = subs->cur_audiofmt != fmt ||
1383 subs->period_bytes != params_period_bytes(hw_params) ||
1384 subs->cur_rate != rate;
1385 if ((ret = set_format(subs, fmt)) < 0)
1386 return ret;
1387
1388 if (subs->cur_rate != rate) {
1389 struct usb_host_interface *alts;
1390 struct usb_interface *iface;
1391 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1392 alts = &iface->altsetting[fmt->altset_idx];
1393 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1394 if (ret < 0)
1395 return ret;
1396 subs->cur_rate = rate;
1397 }
1398
1399 if (changed) {
1400 /* format changed */
1401 release_substream_urbs(subs, 0);
1402 /* influenced: period_bytes, channels, rate, format, */
1403 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1404 params_rate(hw_params),
1405 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1406 }
1407
1408 return ret;
1409}
1410
1411/*
1412 * hw_free callback
1413 *
1414 * reset the audio format and release the buffer
1415 */
86e07d34 1416static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1da177e4 1417{
86e07d34 1418 struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
1da177e4
LT		 1419
1420 subs->cur_audiofmt = NULL;
1421 subs->cur_rate = 0;
1422 subs->period_bytes = 0;
1423 release_substream_urbs(subs, 0);
6207e51b 1424 return snd_pcm_free_vmalloc_buffer(substream);
1da177e4
LT		 1425}
1426
1427/*
1428 * prepare callback
1429 *
1430 * only a few subtle things...
1431 */
86e07d34 1432static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 1433{
86e07d34
TI		 1434 struct snd_pcm_runtime *runtime = substream->runtime;
1435 struct snd_usb_substream *subs = runtime->private_data;
1da177e4
LT		 1436
1437 if (! subs->cur_audiofmt) {
1438 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1439 return -ENXIO;
1440 }
1441
1442 /* some unit conversions in runtime */
1443 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1444 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1445
1446 /* reset the pointer */
1da177e4 1447 subs->hwptr_done = 0;
1da177e4
LT		 1448 subs->transfer_done = 0;
1449 subs->phase = 0;
1450
1451 /* clear urbs (to be sure) */
1452 deactivate_urbs(subs, 0, 1);
1453 wait_clear_urbs(subs);
1454
b55bbf06
CL		 1455 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1456 * updates for all URBs would happen at the same time when starting */
1457 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1458 subs->ops.prepare = prepare_startup_playback_urb;
1459 return start_urbs(subs, runtime);
1460 } else
1461 return 0;
1da177e4
LT		 1462}
1463
86e07d34 1464static struct snd_pcm_hardware snd_usb_playback =
1da177e4 1465{
49045d3d
CL		 1466 .info = SNDRV_PCM_INFO_MMAP |
1467 SNDRV_PCM_INFO_MMAP_VALID |
1468 SNDRV_PCM_INFO_BATCH |
1469 SNDRV_PCM_INFO_INTERLEAVED |
1470 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1471 .buffer_bytes_max = 1024 * 1024,
1da177e4 1472 .period_bytes_min = 64,
d31cbbfd 1473 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1474 .periods_min = 2,
1475 .periods_max = 1024,
1476};
1477
86e07d34 1478static struct snd_pcm_hardware snd_usb_capture =
1da177e4 1479{
49045d3d
CL		 1480 .info = SNDRV_PCM_INFO_MMAP |
1481 SNDRV_PCM_INFO_MMAP_VALID |
1482 SNDRV_PCM_INFO_BATCH |
1483 SNDRV_PCM_INFO_INTERLEAVED |
1484 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1485 .buffer_bytes_max = 1024 * 1024,
1da177e4 1486 .period_bytes_min = 64,
d31cbbfd 1487 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1488 .periods_min = 2,
1489 .periods_max = 1024,
1490};
1491
1492/*
1493 * h/w constraints
1494 */
1495
1496#ifdef HW_CONST_DEBUG
1497#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1498#else
1499#define hwc_debug(fmt, args...) /**/
1500#endif
1501
86e07d34 1502static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
1da177e4 1503{
86e07d34
TI		 1504 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1505 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1506 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1507
1508 /* check the format */
1509 if (! snd_mask_test(fmts, fp->format)) {
1510 hwc_debug(" > check: no supported format %d\n", fp->format);
1511 return 0;
1512 }
1513 /* check the channels */
1514 if (fp->channels < ct->min || fp->channels > ct->max) {
1515 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1516 return 0;
1517 }
1518 /* check the rate is within the range */
1519 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1520 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1521 return 0;
1522 }
1523 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1524 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1525 return 0;
1526 }
1527 return 1;
1528}
1529
86e07d34
TI		 1530static int hw_rule_rate(struct snd_pcm_hw_params *params,
1531 struct snd_pcm_hw_rule *rule)
1da177e4 1532{
86e07d34 1533 struct snd_usb_substream *subs = rule->private;
1da177e4 1534 struct list_head *p;
86e07d34 1535 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 1536 unsigned int rmin, rmax;
1537 int changed;
1538
1539 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1540 changed = 0;
1541 rmin = rmax = 0;
1542 list_for_each(p, &subs->fmt_list) {
1543 struct audioformat *fp;
1544 fp = list_entry(p, struct audioformat, list);
1545 if (! hw_check_valid_format(params, fp))
1546 continue;
1547 if (changed++) {
1548 if (rmin > fp->rate_min)
1549 rmin = fp->rate_min;
1550 if (rmax < fp->rate_max)
1551 rmax = fp->rate_max;
1552 } else {
1553 rmin = fp->rate_min;
1554 rmax = fp->rate_max;
1555 }
1556 }
1557
1558 if (! changed) {
1559 hwc_debug(" --> get empty\n");
1560 it->empty = 1;
1561 return -EINVAL;
1562 }
1563
1564 changed = 0;
1565 if (it->min < rmin) {
1566 it->min = rmin;
1567 it->openmin = 0;
1568 changed = 1;
1569 }
1570 if (it->max > rmax) {
1571 it->max = rmax;
1572 it->openmax = 0;
1573 changed = 1;
1574 }
1575 if (snd_interval_checkempty(it)) {
1576 it->empty = 1;
1577 return -EINVAL;
1578 }
1579 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1580 return changed;
1581}
1582
1583
86e07d34
TI		 1584static int hw_rule_channels(struct snd_pcm_hw_params *params,
1585 struct snd_pcm_hw_rule *rule)
1da177e4 1586{
86e07d34 1587 struct snd_usb_substream *subs = rule->private;
1da177e4 1588 struct list_head *p;
86e07d34 1589 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1da177e4
LT		 1590 unsigned int rmin, rmax;
1591 int changed;
1592
1593 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1594 changed = 0;
1595 rmin = rmax = 0;
1596 list_for_each(p, &subs->fmt_list) {
1597 struct audioformat *fp;
1598 fp = list_entry(p, struct audioformat, list);
1599 if (! hw_check_valid_format(params, fp))
1600 continue;
1601 if (changed++) {
1602 if (rmin > fp->channels)
1603 rmin = fp->channels;
1604 if (rmax < fp->channels)
1605 rmax = fp->channels;
1606 } else {
1607 rmin = fp->channels;
1608 rmax = fp->channels;
1609 }
1610 }
1611
1612 if (! changed) {
1613 hwc_debug(" --> get empty\n");
1614 it->empty = 1;
1615 return -EINVAL;
1616 }
1617
1618 changed = 0;
1619 if (it->min < rmin) {
1620 it->min = rmin;
1621 it->openmin = 0;
1622 changed = 1;
1623 }
1624 if (it->max > rmax) {
1625 it->max = rmax;
1626 it->openmax = 0;
1627 changed = 1;
1628 }
1629 if (snd_interval_checkempty(it)) {
1630 it->empty = 1;
1631 return -EINVAL;
1632 }
1633 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1634 return changed;
1635}
1636
86e07d34
TI		 1637static int hw_rule_format(struct snd_pcm_hw_params *params,
1638 struct snd_pcm_hw_rule *rule)
1da177e4 1639{
86e07d34 1640 struct snd_usb_substream *subs = rule->private;
1da177e4 1641 struct list_head *p;
86e07d34 1642 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1643 u64 fbits;
1644 u32 oldbits[2];
1645 int changed;
1646
1647 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1648 fbits = 0;
1649 list_for_each(p, &subs->fmt_list) {
1650 struct audioformat *fp;
1651 fp = list_entry(p, struct audioformat, list);
1652 if (! hw_check_valid_format(params, fp))
1653 continue;
1654 fbits |= (1ULL << fp->format);
1655 }
1656
1657 oldbits[0] = fmt->bits[0];
1658 oldbits[1] = fmt->bits[1];
1659 fmt->bits[0] &= (u32)fbits;
1660 fmt->bits[1] &= (u32)(fbits >> 32);
1661 if (! fmt->bits[0] && ! fmt->bits[1]) {
1662 hwc_debug(" --> get empty\n");
1663 return -EINVAL;
1664 }
1665 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1666 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1667 return changed;
1668}
1669
1670#define MAX_MASK 64
1671
1672/*
1673 * check whether the registered audio formats need special hw-constraints
1674 */
86e07d34 1675static int check_hw_params_convention(struct snd_usb_substream *subs)
1da177e4
LT		 1676{
1677 int i;
1678 u32 *channels;
1679 u32 *rates;
1680 u32 cmaster, rmaster;
1681 u32 rate_min = 0, rate_max = 0;
1682 struct list_head *p;
1683 int err = 1;
1684
1685 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1686 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1687
1688 list_for_each(p, &subs->fmt_list) {
1689 struct audioformat *f;
1690 f = list_entry(p, struct audioformat, list);
1691 /* unconventional channels? */
1692 if (f->channels > 32)
1693 goto __out;
1694 /* continuous rate min/max matches? */
1695 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1696 if (rate_min && f->rate_min != rate_min)
1697 goto __out;
1698 if (rate_max && f->rate_max != rate_max)
1699 goto __out;
1700 rate_min = f->rate_min;
1701 rate_max = f->rate_max;
1702 }
1703 /* combination of continuous rates and fixed rates? */
1704 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1705 if (f->rates != rates[f->format])
1706 goto __out;
1707 }
1708 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1709 if (rates[f->format] && rates[f->format] != f->rates)
1710 goto __out;
1711 }
1712 channels[f->format] |= (1 << f->channels);
1713 rates[f->format] |= f->rates;
1714 }
1715 /* check whether channels and rates match for all formats */
1716 cmaster = rmaster = 0;
1717 for (i = 0; i < MAX_MASK; i++) {
1718 if (cmaster != channels[i] && cmaster && channels[i])
1719 goto __out;
1720 if (rmaster != rates[i] && rmaster && rates[i])
1721 goto __out;
1722 if (channels[i])
1723 cmaster = channels[i];
1724 if (rates[i])
1725 rmaster = rates[i];
1726 }
1727 /* check whether channels match for all distinct rates */
1728 memset(channels, 0, MAX_MASK * sizeof(u32));
1729 list_for_each(p, &subs->fmt_list) {
1730 struct audioformat *f;
1731 f = list_entry(p, struct audioformat, list);
1732 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1733 continue;
1734 for (i = 0; i < 32; i++) {
1735 if (f->rates & (1 << i))
1736 channels[i] |= (1 << f->channels);
1737 }
1738 }
1739 cmaster = 0;
1740 for (i = 0; i < 32; i++) {
1741 if (cmaster != channels[i] && cmaster && channels[i])
1742 goto __out;
1743 if (channels[i])
1744 cmaster = channels[i];
1745 }
1746 err = 0;
1747
1748 __out:
1749 kfree(channels);
1750 kfree(rates);
1751 return err;
1752}
1753
1754
1755/*
1756 * set up the runtime hardware information.
1757 */
1758
86e07d34 1759static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1da177e4
LT		 1760{
1761 struct list_head *p;
1762 int err;
1763
1764 runtime->hw.formats = subs->formats;
1765
1766 runtime->hw.rate_min = 0x7fffffff;
1767 runtime->hw.rate_max = 0;
1768 runtime->hw.channels_min = 256;
1769 runtime->hw.channels_max = 0;
1770 runtime->hw.rates = 0;
1771 /* check min/max rates and channels */
1772 list_for_each(p, &subs->fmt_list) {
1773 struct audioformat *fp;
1774 fp = list_entry(p, struct audioformat, list);
1775 runtime->hw.rates |= fp->rates;
1776 if (runtime->hw.rate_min > fp->rate_min)
1777 runtime->hw.rate_min = fp->rate_min;
1778 if (runtime->hw.rate_max < fp->rate_max)
1779 runtime->hw.rate_max = fp->rate_max;
1780 if (runtime->hw.channels_min > fp->channels)
1781 runtime->hw.channels_min = fp->channels;
1782 if (runtime->hw.channels_max < fp->channels)
1783 runtime->hw.channels_max = fp->channels;
1784 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1785 /* FIXME: there might be more than one audio formats... */
1786 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1787 fp->frame_size;
1788 }
1789 }
1790
1791 /* set the period time minimum 1ms */
1792 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1793 1000 * MIN_PACKS_URB,
1794 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1795
1796 if (check_hw_params_convention(subs)) {
1797 hwc_debug("setting extra hw constraints...\n");
1798 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1799 hw_rule_rate, subs,
1800 SNDRV_PCM_HW_PARAM_FORMAT,
1801 SNDRV_PCM_HW_PARAM_CHANNELS,
1802 -1)) < 0)
1803 return err;
1804 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1805 hw_rule_channels, subs,
1806 SNDRV_PCM_HW_PARAM_FORMAT,
1807 SNDRV_PCM_HW_PARAM_RATE,
1808 -1)) < 0)
1809 return err;
1810 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1811 hw_rule_format, subs,
1812 SNDRV_PCM_HW_PARAM_RATE,
1813 SNDRV_PCM_HW_PARAM_CHANNELS,
1814 -1)) < 0)
1815 return err;
1816 }
1817 return 0;
1818}
1819
86e07d34
TI		 1820static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction,
1821 struct snd_pcm_hardware *hw)
1da177e4 1822{
86e07d34
TI		 1823 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1824 struct snd_pcm_runtime *runtime = substream->runtime;
1825 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1826
1827 subs->interface = -1;
1828 subs->format = 0;
1829 runtime->hw = *hw;
1830 runtime->private_data = subs;
1831 subs->pcm_substream = substream;
1832 return setup_hw_info(runtime, subs);
1833}
1834
86e07d34 1835static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1da177e4 1836{
86e07d34
TI		 1837 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1838 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1839
1840 if (subs->interface >= 0) {
1841 usb_set_interface(subs->dev, subs->interface, 0);
1842 subs->interface = -1;
1843 }
1844 subs->pcm_substream = NULL;
1845 return 0;
1846}
1847
86e07d34 1848static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1da177e4
LT		 1849{
1850 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1851}
1852
86e07d34 1853static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1854{
1855 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1856}
1857
86e07d34 1858static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1da177e4
LT		 1859{
1860 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1861}
1862
86e07d34 1863static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1864{
1865 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1866}
1867
86e07d34 1868static struct snd_pcm_ops snd_usb_playback_ops = {
1da177e4
LT		 1869 .open = snd_usb_playback_open,
1870 .close = snd_usb_playback_close,
1871 .ioctl = snd_pcm_lib_ioctl,
1872 .hw_params = snd_usb_hw_params,
1873 .hw_free = snd_usb_hw_free,
1874 .prepare = snd_usb_pcm_prepare,
b55bbf06 1875 .trigger = snd_usb_pcm_playback_trigger,
1da177e4 1876 .pointer = snd_usb_pcm_pointer,
6207e51b 1877 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1878};
1879
86e07d34 1880static struct snd_pcm_ops snd_usb_capture_ops = {
1da177e4
LT		 1881 .open = snd_usb_capture_open,
1882 .close = snd_usb_capture_close,
1883 .ioctl = snd_pcm_lib_ioctl,
1884 .hw_params = snd_usb_hw_params,
1885 .hw_free = snd_usb_hw_free,
1886 .prepare = snd_usb_pcm_prepare,
b55bbf06 1887 .trigger = snd_usb_pcm_capture_trigger,
1da177e4 1888 .pointer = snd_usb_pcm_pointer,
6207e51b 1889 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1890};
1891
1892
1893
1894/*
1895 * helper functions
1896 */
1897
1898/*
1899 * combine bytes and get an integer value
1900 */
1901unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1902{
1903 switch (size) {
1904 case 1: return *bytes;
1905 case 2: return combine_word(bytes);
1906 case 3: return combine_triple(bytes);
1907 case 4: return combine_quad(bytes);
1908 default: return 0;
1909 }
1910}
1911
1912/*
1913 * parse descriptor buffer and return the pointer starting the given
1914 * descriptor type.
1915 */
1916void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1917{
1918 u8 *p, *end, *next;
1919
1920 p = descstart;
1921 end = p + desclen;
1922 for (; p < end;) {
1923 if (p[0] < 2)
1924 return NULL;
1925 next = p + p[0];
1926 if (next > end)
1927 return NULL;
1928 if (p[1] == dtype && (!after || (void *)p > after)) {
1929 return p;
1930 }
1931 p = next;
1932 }
1933 return NULL;
1934}
1935
1936/*
1937 * find a class-specified interface descriptor with the given subtype.
1938 */
1939void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1940{
1941 unsigned char *p = after;
1942
1943 while ((p = snd_usb_find_desc(buffer, buflen, p,
1944 USB_DT_CS_INTERFACE)) != NULL) {
1945 if (p[0] >= 3 && p[2] == dsubtype)
1946 return p;
1947 }
1948 return NULL;
1949}
1950
1951/*
1952 * Wrapper for usb_control_msg().
1953 * Allocates a temp buffer to prevent dmaing from/to the stack.
1954 */
1955int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1956 __u8 requesttype, __u16 value, __u16 index, void *data,
1957 __u16 size, int timeout)
1958{
1959 int err;
1960 void *buf = NULL;
1961
1962 if (size > 0) {
1963 buf = kmalloc(size, GFP_KERNEL);
1964 if (!buf)
1965 return -ENOMEM;
1966 memcpy(buf, data, size);
1967 }
1968 err = usb_control_msg(dev, pipe, request, requesttype,
1969 value, index, buf, size, timeout);
1970 if (size > 0) {
1971 memcpy(data, buf, size);
1972 kfree(buf);
1973 }
1974 return err;
1975}
1976
1977
1978/*
1979 * entry point for linux usb interface
1980 */
1981
1982static int usb_audio_probe(struct usb_interface *intf,
1983 const struct usb_device_id *id);
1984static void usb_audio_disconnect(struct usb_interface *intf);
1985
1986static struct usb_device_id usb_audio_ids [] = {
1987#include "usbquirks.h"
1988 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1989 .bInterfaceClass = USB_CLASS_AUDIO,
1990 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
1991 { } /* Terminating entry */
1992};
1993
1994MODULE_DEVICE_TABLE (usb, usb_audio_ids);
1995
1996static struct usb_driver usb_audio_driver = {
1da177e4
LT		 1997 .name = "snd-usb-audio",
1998 .probe = usb_audio_probe,
1999 .disconnect = usb_audio_disconnect,
2000 .id_table = usb_audio_ids,
2001};
2002
2003
2004/*
2005 * proc interface for list the supported pcm formats
2006 */
86e07d34 2007static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2008{
2009 struct list_head *p;
2010 static char *sync_types[4] = {
2011 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2012 };
2013
2014 list_for_each(p, &subs->fmt_list) {
2015 struct audioformat *fp;
2016 fp = list_entry(p, struct audioformat, list);
2017 snd_iprintf(buffer, " Interface %d\n", fp->iface);
2018 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
2019 snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
2020 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
2021 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
2022 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2023 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2024 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2025 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2026 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2027 fp->rate_min, fp->rate_max);
2028 } else {
2029 unsigned int i;
2030 snd_iprintf(buffer, " Rates: ");
2031 for (i = 0; i < fp->nr_rates; i++) {
2032 if (i > 0)
2033 snd_iprintf(buffer, ", ");
2034 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2035 }
2036 snd_iprintf(buffer, "\n");
2037 }
2038 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2039 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2040 }
2041}
2042
86e07d34 2043static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2044{
2045 if (subs->running) {
2046 unsigned int i;
2047 snd_iprintf(buffer, " Status: Running\n");
2048 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2049 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2050 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2051 for (i = 0; i < subs->nurbs; i++)
2052 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2053 snd_iprintf(buffer, "]\n");
2054 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2055 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2056 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2057 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2058 : get_high_speed_hz(subs->freqm),
2059 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2060 } else {
2061 snd_iprintf(buffer, " Status: Stop\n");
2062 }
2063}
2064
86e07d34 2065static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 2066{
86e07d34 2067 struct snd_usb_stream *stream = entry->private_data;
1da177e4
LT		 2068
2069 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2070
2071 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2072 snd_iprintf(buffer, "\nPlayback:\n");
2073 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2074 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2075 }
2076 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2077 snd_iprintf(buffer, "\nCapture:\n");
2078 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2079 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2080 }
2081}
2082
86e07d34 2083static void proc_pcm_format_add(struct snd_usb_stream *stream)
1da177e4 2084{
86e07d34 2085 struct snd_info_entry *entry;
1da177e4 2086 char name[32];
86e07d34 2087 struct snd_card *card = stream->chip->card;
1da177e4
LT		 2088
2089 sprintf(name, "stream%d", stream->pcm_index);
2090 if (! snd_card_proc_new(card, name, &entry))
2091 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2092}
2093
2094
2095/*
2096 * initialize the substream instance.
2097 */
2098
86e07d34 2099static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
1da177e4 2100{
86e07d34 2101 struct snd_usb_substream *subs = &as->substream[stream];
1da177e4
LT		 2102
2103 INIT_LIST_HEAD(&subs->fmt_list);
2104 spin_lock_init(&subs->lock);
2105
2106 subs->stream = as;
2107 subs->direction = stream;
2108 subs->dev = as->chip->dev;
2109 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2110 subs->ops = audio_urb_ops[stream];
2111 else
2112 subs->ops = audio_urb_ops_high_speed[stream];
1da177e4
LT		 2113 snd_pcm_set_ops(as->pcm, stream,
2114 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2115 &snd_usb_playback_ops : &snd_usb_capture_ops);
2116
2117 list_add_tail(&fp->list, &subs->fmt_list);
2118 subs->formats |= 1ULL << fp->format;
2119 subs->endpoint = fp->endpoint;
2120 subs->num_formats++;
2121 subs->fmt_type = fp->fmt_type;
2122}
2123
2124
2125/*
2126 * free a substream
2127 */
86e07d34 2128static void free_substream(struct snd_usb_substream *subs)
1da177e4
LT		 2129{
2130 struct list_head *p, *n;
2131
2132 if (! subs->num_formats)
2133 return; /* not initialized */
2134 list_for_each_safe(p, n, &subs->fmt_list) {
2135 struct audioformat *fp = list_entry(p, struct audioformat, list);
2136 kfree(fp->rate_table);
2137 kfree(fp);
2138 }
2139}
2140
2141
2142/*
2143 * free a usb stream instance
2144 */
86e07d34 2145static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
1da177e4
LT		 2146{
2147 free_substream(&stream->substream[0]);
2148 free_substream(&stream->substream[1]);
2149 list_del(&stream->list);
2150 kfree(stream);
2151}
2152
86e07d34 2153static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
1da177e4 2154{
86e07d34 2155 struct snd_usb_stream *stream = pcm->private_data;
1da177e4
LT		 2156 if (stream) {
2157 stream->pcm = NULL;
1da177e4
LT		 2158 snd_usb_audio_stream_free(stream);
2159 }
2160}
2161
2162
2163/*
2164 * add this endpoint to the chip instance.
2165 * if a stream with the same endpoint already exists, append to it.
2166 * if not, create a new pcm stream.
2167 */
86e07d34 2168static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
1da177e4
LT		 2169{
2170 struct list_head *p;
86e07d34
TI		 2171 struct snd_usb_stream *as;
2172 struct snd_usb_substream *subs;
2173 struct snd_pcm *pcm;
1da177e4
LT		 2174 int err;
2175
2176 list_for_each(p, &chip->pcm_list) {
86e07d34 2177 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2178 if (as->fmt_type != fp->fmt_type)
2179 continue;
2180 subs = &as->substream[stream];
2181 if (! subs->endpoint)
2182 continue;
2183 if (subs->endpoint == fp->endpoint) {
2184 list_add_tail(&fp->list, &subs->fmt_list);
2185 subs->num_formats++;
2186 subs->formats |= 1ULL << fp->format;
2187 return 0;
2188 }
2189 }
2190 /* look for an empty stream */
2191 list_for_each(p, &chip->pcm_list) {
86e07d34 2192 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2193 if (as->fmt_type != fp->fmt_type)
2194 continue;
2195 subs = &as->substream[stream];
2196 if (subs->endpoint)
2197 continue;
2198 err = snd_pcm_new_stream(as->pcm, stream, 1);
2199 if (err < 0)
2200 return err;
2201 init_substream(as, stream, fp);
2202 return 0;
2203 }
2204
2205 /* create a new pcm */
2206 as = kmalloc(sizeof(*as), GFP_KERNEL);
2207 if (! as)
2208 return -ENOMEM;
2209 memset(as, 0, sizeof(*as));
2210 as->pcm_index = chip->pcm_devs;
2211 as->chip = chip;
2212 as->fmt_type = fp->fmt_type;
2213 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2214 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2215 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2216 &pcm);
2217 if (err < 0) {
2218 kfree(as);
2219 return err;
2220 }
2221 as->pcm = pcm;
2222 pcm->private_data = as;
2223 pcm->private_free = snd_usb_audio_pcm_free;
2224 pcm->info_flags = 0;
2225 if (chip->pcm_devs > 0)
2226 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2227 else
2228 strcpy(pcm->name, "USB Audio");
2229
2230 init_substream(as, stream, fp);
2231
2232 list_add(&as->list, &chip->pcm_list);
2233 chip->pcm_devs++;
2234
2235 proc_pcm_format_add(as);
2236
2237 return 0;
2238}
2239
2240
2241/*
2242 * check if the device uses big-endian samples
2243 */
86e07d34 2244static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1da177e4 2245{
27d10f56
CL		 2246 switch (chip->usb_id) {
2247 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2248 if (fp->endpoint & USB_DIR_IN)
1da177e4 2249 return 1;
27d10f56
CL		 2250 break;
2251 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2252 return 1;
1da177e4
LT		 2253 }
2254 return 0;
2255}
2256
2257/*
2258 * parse the audio format type I descriptor
2259 * and returns the corresponding pcm format
2260 *
2261 * @dev: usb device
2262 * @fp: audioformat record
2263 * @format: the format tag (wFormatTag)
2264 * @fmt: the format type descriptor
2265 */
86e07d34 2266static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2267 int format, unsigned char *fmt)
2268{
2269 int pcm_format;
2270 int sample_width, sample_bytes;
2271
2272 /* FIXME: correct endianess and sign? */
2273 pcm_format = -1;
2274 sample_width = fmt[6];
2275 sample_bytes = fmt[5];
2276 switch (format) {
2277 case 0: /* some devices don't define this correctly... */
2278 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2279 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2280 /* fall-through */
2281 case USB_AUDIO_FORMAT_PCM:
2282 if (sample_width > sample_bytes * 8) {
2283 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2284 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2285 sample_width, sample_bytes);
2286 }
2287 /* check the format byte size */
2288 switch (fmt[5]) {
2289 case 1:
2290 pcm_format = SNDRV_PCM_FORMAT_S8;
2291 break;
2292 case 2:
27d10f56 2293 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2294 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2295 else
2296 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2297 break;
2298 case 3:
27d10f56 2299 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2300 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2301 else
2302 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2303 break;
2304 case 4:
2305 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2306 break;
2307 default:
2308 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2309 chip->dev->devnum, fp->iface,
2310 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2311 break;
2312 }
2313 break;
2314 case USB_AUDIO_FORMAT_PCM8:
2315 /* Dallas DS4201 workaround */
27d10f56 2316 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4
LT		 2317 pcm_format = SNDRV_PCM_FORMAT_S8;
2318 else
2319 pcm_format = SNDRV_PCM_FORMAT_U8;
2320 break;
2321 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2322 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2323 break;
2324 case USB_AUDIO_FORMAT_ALAW:
2325 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2326 break;
2327 case USB_AUDIO_FORMAT_MU_LAW:
2328 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2329 break;
2330 default:
2331 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2332 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2333 break;
2334 }
2335 return pcm_format;
2336}
2337
2338
2339/*
2340 * parse the format descriptor and stores the possible sample rates
2341 * on the audioformat table.
2342 *
2343 * @dev: usb device
2344 * @fp: audioformat record
2345 * @fmt: the format descriptor
2346 * @offset: the start offset of descriptor pointing the rate type
2347 * (7 for type I and II, 8 for type II)
2348 */
86e07d34 2349static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2350 unsigned char *fmt, int offset)
2351{
2352 int nr_rates = fmt[offset];
2353 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2354 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2355 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2356 return -1;
2357 }
2358
2359 if (nr_rates) {
2360 /*
2361 * build the rate table and bitmap flags
2362 */
2363 int r, idx, c;
2364 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2365 static unsigned int conv_rates[] = {
2366 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2367 64000, 88200, 96000, 176400, 192000
2368 };
2369 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2370 if (fp->rate_table == NULL) {
2371 snd_printk(KERN_ERR "cannot malloc\n");
2372 return -1;
2373 }
2374
2375 fp->nr_rates = nr_rates;
2376 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2377 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2378 unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2379 if (rate < fp->rate_min)
2380 fp->rate_min = rate;
2381 else if (rate > fp->rate_max)
2382 fp->rate_max = rate;
2383 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2384 if (rate == conv_rates[c]) {
2385 fp->rates |= (1 << c);
2386 break;
2387 }
2388 }
2389 }
2390 } else {
2391 /* continuous rates */
2392 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2393 fp->rate_min = combine_triple(&fmt[offset + 1]);
2394 fp->rate_max = combine_triple(&fmt[offset + 4]);
2395 }
2396 return 0;
2397}
2398
2399/*
2400 * parse the format type I and III descriptors
2401 */
86e07d34 2402static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2403 int format, unsigned char *fmt)
2404{
2405 int pcm_format;
2406
2407 if (fmt[3] == USB_FORMAT_TYPE_III) {
2408 /* FIXME: the format type is really IECxxx
2409 * but we give normal PCM format to get the existing
2410 * apps working...
2411 */
2412 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2413 } else {
27d10f56 2414 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2415 if (pcm_format < 0)
2416 return -1;
2417 }
2418 fp->format = pcm_format;
2419 fp->channels = fmt[4];
2420 if (fp->channels < 1) {
2421 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2422 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2423 return -1;
2424 }
27d10f56 2425 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2426}
2427
2428/*
2429 * prase the format type II descriptor
2430 */
86e07d34 2431static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2432 int format, unsigned char *fmt)
2433{
2434 int brate, framesize;
2435 switch (format) {
2436 case USB_AUDIO_FORMAT_AC3:
2437 /* FIXME: there is no AC3 format defined yet */
2438 // fp->format = SNDRV_PCM_FORMAT_AC3;
2439 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2440 break;
2441 case USB_AUDIO_FORMAT_MPEG:
2442 fp->format = SNDRV_PCM_FORMAT_MPEG;
2443 break;
2444 default:
2445 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
27d10f56 2446 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2447 fp->format = SNDRV_PCM_FORMAT_MPEG;
2448 break;
2449 }
2450 fp->channels = 1;
2451 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2452 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2453 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2454 fp->frame_size = framesize;
27d10f56 2455 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2456}
2457
86e07d34 2458static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2459 int format, unsigned char *fmt, int stream)
2460{
2461 int err;
2462
2463 switch (fmt[3]) {
2464 case USB_FORMAT_TYPE_I:
2465 case USB_FORMAT_TYPE_III:
27d10f56 2466 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2467 break;
2468 case USB_FORMAT_TYPE_II:
27d10f56 2469 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2470 break;
2471 default:
2472 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2473 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2474 return -1;
2475 }
2476 fp->fmt_type = fmt[3];
2477 if (err < 0)
2478 return err;
2479#if 1
8c1872dc 2480 /* FIXME: temporary hack for extigy/audigy 2 nx */
1da177e4
LT		 2481 /* extigy apparently supports sample rates other than 48k
2482 * but not in ordinary way. so we enable only 48k atm.
2483 */
27d10f56
CL		 2484 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2485 chip->usb_id == USB_ID(0x041e, 0x3020)) {
1da177e4 2486 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2487 fp->rates != SNDRV_PCM_RATE_48000 &&
2488 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2489 return -1;
1da177e4
LT		 2490 }
2491#endif
2492 return 0;
2493}
2494
86e07d34 2495static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
1da177e4
LT		 2496{
2497 struct usb_device *dev;
2498 struct usb_interface *iface;
2499 struct usb_host_interface *alts;
2500 struct usb_interface_descriptor *altsd;
2501 int i, altno, err, stream;
2502 int format;
2503 struct audioformat *fp;
2504 unsigned char *fmt, *csep;
2505
2506 dev = chip->dev;
2507
2508 /* parse the interface's altsettings */
2509 iface = usb_ifnum_to_if(dev, iface_no);
2510 for (i = 0; i < iface->num_altsetting; i++) {
2511 alts = &iface->altsetting[i];
2512 altsd = get_iface_desc(alts);
2513 /* skip invalid one */
2514 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2515 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2516 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2517 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2518 altsd->bNumEndpoints < 1 ||
2519 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2520 continue;
2521 /* must be isochronous */
2522 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2523 USB_ENDPOINT_XFER_ISOC)
2524 continue;
2525 /* check direction */
2526 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2527 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2528 altno = altsd->bAlternateSetting;
2529
2530 /* get audio formats */
2531 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2532 if (!fmt) {
2533 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2534 dev->devnum, iface_no, altno);
2535 continue;
2536 }
2537
2538 if (fmt[0] < 7) {
2539 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2540 dev->devnum, iface_no, altno);
2541 continue;
2542 }
2543
2544 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2545
2546 /* get format type */
2547 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2548 if (!fmt) {
2549 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2550 dev->devnum, iface_no, altno);
2551 continue;
2552 }
2553 if (fmt[0] < 8) {
2554 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2555 dev->devnum, iface_no, altno);
2556 continue;
2557 }
2558
2559 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2560 /* Creamware Noah has this descriptor after the 2nd endpoint */
2561 if (!csep && altsd->bNumEndpoints >= 2)
2562 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2563 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2564 snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2565 dev->devnum, iface_no, altno);
2566 continue;
2567 }
2568
2569 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2570 if (! fp) {
2571 snd_printk(KERN_ERR "cannot malloc\n");
2572 return -ENOMEM;
2573 }
2574
2575 memset(fp, 0, sizeof(*fp));
2576 fp->iface = iface_no;
2577 fp->altsetting = altno;
2578 fp->altset_idx = i;
2579 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2580 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
1da177e4 2581 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2582 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2583 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2584 * (fp->maxpacksize & 0x7ff);
1da177e4
LT		 2585 fp->attributes = csep[3];
2586
2587 /* some quirks for attributes here */
2588
c3f93297
CL		 2589 switch (chip->usb_id) {
2590 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2591 /* Optoplay sets the sample rate attribute although
2592 * it seems not supporting it in fact.
2593 */
2594 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2595 break;
2596 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2597 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2598 /* doesn't set the sample rate attribute, but supports it */
2599 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2600 break;
2601 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2602 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2603 an older model 77d:223) */
1da177e4
LT		 2604 /*
2605 * plantronics headset and Griffin iMic have set adaptive-in
2606 * although it's really not...
2607 */
1da177e4
LT		 2608 fp->ep_attr &= ~EP_ATTR_MASK;
2609 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2610 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2611 else
2612 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2613 break;
1da177e4
LT		 2614 }
2615
2616 /* ok, let's parse further... */
27d10f56 2617 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2618 kfree(fp->rate_table);
2619 kfree(fp);
2620 continue;
2621 }
2622
2623 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2624 err = add_audio_endpoint(chip, stream, fp);
2625 if (err < 0) {
2626 kfree(fp->rate_table);
2627 kfree(fp);
2628 return err;
2629 }
2630 /* try to set the interface... */
2631 usb_set_interface(chip->dev, iface_no, altno);
2632 init_usb_pitch(chip->dev, iface_no, alts, fp);
2633 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2634 }
2635 return 0;
2636}
2637
2638
2639/*
2640 * disconnect streams
2641 * called from snd_usb_audio_disconnect()
2642 */
ee733397 2643static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2644{
2645 int idx;
86e07d34
TI		 2646 struct snd_usb_stream *as;
2647 struct snd_usb_substream *subs;
1da177e4 2648
86e07d34 2649 as = list_entry(head, struct snd_usb_stream, list);
1da177e4
LT		 2650 for (idx = 0; idx < 2; idx++) {
2651 subs = &as->substream[idx];
2652 if (!subs->num_formats)
2653 return;
2654 release_substream_urbs(subs, 1);
2655 subs->interface = -1;
2656 }
2657}
2658
2659/*
2660 * parse audio control descriptor and create pcm/midi streams
2661 */
86e07d34 2662static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
1da177e4
LT		 2663{
2664 struct usb_device *dev = chip->dev;
2665 struct usb_host_interface *host_iface;
2666 struct usb_interface *iface;
2667 unsigned char *p1;
2668 int i, j;
2669
2670 /* find audiocontrol interface */
2671 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2672 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2673 snd_printk(KERN_ERR "cannot find HEADER\n");
2674 return -EINVAL;
2675 }
2676 if (! p1[7] || p1[0] < 8 + p1[7]) {
2677 snd_printk(KERN_ERR "invalid HEADER\n");
2678 return -EINVAL;
2679 }
2680
2681 /*
2682 * parse all USB audio streaming interfaces
2683 */
2684 for (i = 0; i < p1[7]; i++) {
2685 struct usb_host_interface *alts;
2686 struct usb_interface_descriptor *altsd;
2687 j = p1[8 + i];
2688 iface = usb_ifnum_to_if(dev, j);
2689 if (!iface) {
2690 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2691 dev->devnum, ctrlif, j);
2692 continue;
2693 }
2694 if (usb_interface_claimed(iface)) {
2695 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2696 continue;
2697 }
2698 alts = &iface->altsetting[0];
2699 altsd = get_iface_desc(alts);
2700 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2701 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2702 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2703 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2704 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2705 continue;
2706 }
2707 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2708 continue;
2709 }
2710 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2711 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2712 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2713 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2714 /* skip non-supported classes */
2715 continue;
2716 }
2717 if (! parse_audio_endpoints(chip, j)) {
2718 usb_set_interface(dev, j, 0); /* reset the current interface */
2719 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2720 }
2721 }
2722
2723 return 0;
2724}
2725
2726/*
2727 * create a stream for an endpoint/altsetting without proper descriptors
2728 */
86e07d34 2729static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
1da177e4 2730 struct usb_interface *iface,
86e07d34 2731 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2732{
2733 struct audioformat *fp;
2734 struct usb_host_interface *alts;
2735 int stream, err;
2736 int *rate_table = NULL;
2737
2738 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2739 if (! fp) {
2740 snd_printk(KERN_ERR "cannot malloc\n");
2741 return -ENOMEM;
2742 }
2743 memcpy(fp, quirk->data, sizeof(*fp));
2744 if (fp->nr_rates > 0) {
2745 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2746 if (!rate_table) {
2747 kfree(fp);
2748 return -ENOMEM;
2749 }
2750 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2751 fp->rate_table = rate_table;
2752 }
2753
2754 stream = (fp->endpoint & USB_DIR_IN)
2755 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2756 err = add_audio_endpoint(chip, stream, fp);
2757 if (err < 0) {
2758 kfree(fp);
2759 kfree(rate_table);
2760 return err;
2761 }
2762 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2763 fp->altset_idx >= iface->num_altsetting) {
2764 kfree(fp);
2765 kfree(rate_table);
2766 return -EINVAL;
2767 }
2768 alts = &iface->altsetting[fp->altset_idx];
2769 usb_set_interface(chip->dev, fp->iface, 0);
2770 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2771 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2772 return 0;
2773}
2774
2775/*
2776 * create a stream for an interface with proper descriptors
2777 */
86e07d34 2778static int create_standard_audio_quirk(struct snd_usb_audio *chip,
d1bda045 2779 struct usb_interface *iface,
86e07d34 2780 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2781{
2782 struct usb_host_interface *alts;
2783 struct usb_interface_descriptor *altsd;
2784 int err;
2785
2786 alts = &iface->altsetting[0];
2787 altsd = get_iface_desc(alts);
d1bda045 2788 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
1da177e4
LT		 2789 if (err < 0) {
2790 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2791 altsd->bInterfaceNumber, err);
2792 return err;
2793 }
d1bda045
CL		 2794 /* reset the current interface */
2795 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
1da177e4
LT		 2796 return 0;
2797}
2798
2799/*
2800 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2801 * to detect the sample rate is by looking at wMaxPacketSize.
2802 */
86e07d34 2803static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
854af957 2804 struct usb_interface *iface,
86e07d34 2805 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2806{
2807 static const struct audioformat ua_format = {
2808 .format = SNDRV_PCM_FORMAT_S24_3LE,
2809 .channels = 2,
2810 .fmt_type = USB_FORMAT_TYPE_I,
2811 .altsetting = 1,
2812 .altset_idx = 1,
2813 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2814 };
2815 struct usb_host_interface *alts;
2816 struct usb_interface_descriptor *altsd;
2817 struct audioformat *fp;
2818 int stream, err;
2819
2820 /* both PCM and MIDI interfaces have 2 altsettings */
2821 if (iface->num_altsetting != 2)
2822 return -ENXIO;
2823 alts = &iface->altsetting[1];
2824 altsd = get_iface_desc(alts);
2825
2826 if (altsd->bNumEndpoints == 2) {
86e07d34 2827 static const struct snd_usb_midi_endpoint_info ua700_ep = {
1da177e4
LT		 2828 .out_cables = 0x0003,
2829 .in_cables = 0x0003
2830 };
86e07d34 2831 static const struct snd_usb_audio_quirk ua700_quirk = {
1da177e4
LT		 2832 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2833 .data = &ua700_ep
2834 };
86e07d34 2835 static const struct snd_usb_midi_endpoint_info ua25_ep = {
1da177e4
LT		 2836 .out_cables = 0x0001,
2837 .in_cables = 0x0001
2838 };
86e07d34 2839 static const struct snd_usb_audio_quirk ua25_quirk = {
1da177e4
LT		 2840 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2841 .data = &ua25_ep
2842 };
27d10f56 2843 if (chip->usb_id == USB_ID(0x0582, 0x002b))
1da177e4
LT		 2844 return snd_usb_create_midi_interface(chip, iface,
2845 &ua700_quirk);
2846 else
2847 return snd_usb_create_midi_interface(chip, iface,
2848 &ua25_quirk);
2849 }
2850
2851 if (altsd->bNumEndpoints != 1)
2852 return -ENXIO;
2853
2854 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2855 if (!fp)
2856 return -ENOMEM;
2857 memcpy(fp, &ua_format, sizeof(*fp));
2858
2859 fp->iface = altsd->bInterfaceNumber;
2860 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2861 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2862 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2863
2864 switch (fp->maxpacksize) {
2865 case 0x120:
2866 fp->rate_max = fp->rate_min = 44100;
2867 break;
2868 case 0x138:
2869 case 0x140:
2870 fp->rate_max = fp->rate_min = 48000;
2871 break;
2872 case 0x258:
2873 case 0x260:
2874 fp->rate_max = fp->rate_min = 96000;
2875 break;
2876 default:
2877 snd_printk(KERN_ERR "unknown sample rate\n");
2878 kfree(fp);
2879 return -ENXIO;
2880 }
2881
2882 stream = (fp->endpoint & USB_DIR_IN)
2883 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2884 err = add_audio_endpoint(chip, stream, fp);
2885 if (err < 0) {
2886 kfree(fp);
2887 return err;
2888 }
2889 usb_set_interface(chip->dev, fp->iface, 0);
2890 return 0;
2891}
2892
2893/*
2894 * Create a stream for an Edirol UA-1000 interface.
2895 */
86e07d34 2896static int create_ua1000_quirk(struct snd_usb_audio *chip,
854af957 2897 struct usb_interface *iface,
86e07d34 2898 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2899{
2900 static const struct audioformat ua1000_format = {
2901 .format = SNDRV_PCM_FORMAT_S32_LE,
2902 .fmt_type = USB_FORMAT_TYPE_I,
2903 .altsetting = 1,
2904 .altset_idx = 1,
2905 .attributes = 0,
2906 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2907 };
2908 struct usb_host_interface *alts;
2909 struct usb_interface_descriptor *altsd;
2910 struct audioformat *fp;
2911 int stream, err;
2912
2913 if (iface->num_altsetting != 2)
2914 return -ENXIO;
2915 alts = &iface->altsetting[1];
2916 altsd = get_iface_desc(alts);
2917 if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2918 altsd->bNumEndpoints != 1)
2919 return -ENXIO;
2920
2921 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2922 if (!fp)
2923 return -ENOMEM;
2924 memcpy(fp, &ua1000_format, sizeof(*fp));
2925
2926 fp->channels = alts->extra[4];
2927 fp->iface = altsd->bInterfaceNumber;
2928 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2929 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2930 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2931 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2932
2933 stream = (fp->endpoint & USB_DIR_IN)
2934 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2935 err = add_audio_endpoint(chip, stream, fp);
2936 if (err < 0) {
2937 kfree(fp);
2938 return err;
2939 }
2940 /* FIXME: playback must be synchronized to capture */
2941 usb_set_interface(chip->dev, fp->iface, 0);
2942 return 0;
2943}
2944
86e07d34 2945static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 2946 struct usb_interface *iface,
86e07d34 2947 const struct snd_usb_audio_quirk *quirk);
1da177e4
LT		 2948
2949/*
2950 * handle the quirks for the contained interfaces
2951 */
86e07d34 2952static int create_composite_quirk(struct snd_usb_audio *chip,
1da177e4 2953 struct usb_interface *iface,
86e07d34 2954 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2955{
2956 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2957 int err;
2958
2959 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2960 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2961 if (!iface)
2962 continue;
2963 if (quirk->ifnum != probed_ifnum &&
2964 usb_interface_claimed(iface))
2965 continue;
2966 err = snd_usb_create_quirk(chip, iface, quirk);
2967 if (err < 0)
2968 return err;
2969 if (quirk->ifnum != probed_ifnum)
2970 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2971 }
2972 return 0;
2973}
2974
86e07d34 2975static int ignore_interface_quirk(struct snd_usb_audio *chip,
854af957 2976 struct usb_interface *iface,
86e07d34 2977 const struct snd_usb_audio_quirk *quirk)
854af957
CL		 2978{
2979 return 0;
2980}
2981
1da177e4
LT		 2982
2983/*
2984 * boot quirks
2985 */
2986
2987#define EXTIGY_FIRMWARE_SIZE_OLD 794
2988#define EXTIGY_FIRMWARE_SIZE_NEW 483
2989
2990static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
2991{
2992 struct usb_host_config *config = dev->actconfig;
2993 int err;
2994
2995 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
2996 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
2997 snd_printdd("sending Extigy boot sequence...\n");
2998 /* Send message to force it to reconnect with full interface. */
2999 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3000 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3001 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3002 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3003 &dev->descriptor, sizeof(dev->descriptor));
3004 config = dev->actconfig;
3005 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3006 err = usb_reset_configuration(dev);
3007 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3008 snd_printdd("extigy_boot: new boot length = %d\n",
3009 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3010 return -ENODEV; /* quit this anyway */
3011 }
3012 return 0;
3013}
3014
3a2f0856
CL		 3015static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3016{
3a2f0856
CL		 3017 u8 buf = 1;
3018
3019 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3020 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3021 0, 0, &buf, 1, 1000);
3022 if (buf == 0) {
3023 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3024 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3025 1, 2000, NULL, 0, 1000);
3026 return -ENODEV;
3027 }
3a2f0856
CL		 3028 return 0;
3029}
3030
1da177e4
LT		 3031
3032/*
3033 * audio-interface quirks
3034 *
3035 * returns zero if no standard audio/MIDI parsing is needed.
3036 * returns a postive value if standard audio/midi interfaces are parsed
3037 * after this.
3038 * returns a negative value at error.
3039 */
86e07d34 3040static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3041 struct usb_interface *iface,
86e07d34 3042 const struct snd_usb_audio_quirk *quirk)
1da177e4 3043{
86e07d34
TI		 3044 typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
3045 const struct snd_usb_audio_quirk *);
854af957
CL		 3046 static const quirk_func_t quirk_funcs[] = {
3047 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3048 [QUIRK_COMPOSITE] = create_composite_quirk,
3049 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3050 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3051 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3052 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3053 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3054 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3055 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3056 [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface,
d1bda045 3057 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
854af957
CL		 3058 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3059 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3060 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3061 };
3062
3063 if (quirk->type < QUIRK_TYPE_COUNT) {
3064 return quirk_funcs[quirk->type](chip, iface, quirk);
3065 } else {
1da177e4
LT		 3066 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3067 return -ENXIO;
3068 }
3069}
3070
3071
3072/*
3073 * common proc files to show the usb device info
3074 */
86e07d34 3075static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3076{
86e07d34 3077 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3078 if (! chip->shutdown)
3079 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3080}
3081
86e07d34 3082static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3083{
86e07d34 3084 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3085 if (! chip->shutdown)
3086 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3087 USB_ID_VENDOR(chip->usb_id),
3088 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3089}
3090
86e07d34 3091static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
1da177e4 3092{
86e07d34 3093 struct snd_info_entry *entry;
1da177e4
LT		 3094 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3095 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3096 if (! snd_card_proc_new(chip->card, "usbid", &entry))
3097 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3098}
3099
3100/*
3101 * free the chip instance
3102 *
3103 * here we have to do not much, since pcm and controls are already freed
3104 *
3105 */
3106
86e07d34 3107static int snd_usb_audio_free(struct snd_usb_audio *chip)
1da177e4
LT		 3108{
3109 kfree(chip);
3110 return 0;
3111}
3112
86e07d34 3113static int snd_usb_audio_dev_free(struct snd_device *device)
1da177e4 3114{
86e07d34 3115 struct snd_usb_audio *chip = device->device_data;
1da177e4
LT		 3116 return snd_usb_audio_free(chip);
3117}
3118
3119
3120/*
3121 * create a chip instance and set its names.
3122 */
3123static int snd_usb_audio_create(struct usb_device *dev, int idx,
86e07d34
TI		 3124 const struct snd_usb_audio_quirk *quirk,
3125 struct snd_usb_audio **rchip)
1da177e4 3126{
86e07d34
TI		 3127 struct snd_card *card;
3128 struct snd_usb_audio *chip;
1da177e4
LT		 3129 int err, len;
3130 char component[14];
86e07d34 3131 static struct snd_device_ops ops = {
1da177e4
LT		 3132 .dev_free = snd_usb_audio_dev_free,
3133 };
3134
3135 *rchip = NULL;
3136
3137 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3138 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3139 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3140 return -ENXIO;
3141 }
3142
3143 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3144 if (card == NULL) {
3145 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3146 return -ENOMEM;
3147 }
3148
561b220a 3149 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4
LT		 3150 if (! chip) {
3151 snd_card_free(card);
3152 return -ENOMEM;
3153 }
3154
3155 chip->index = idx;
3156 chip->dev = dev;
3157 chip->card = card;
27d10f56
CL		 3158 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3159 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3160 INIT_LIST_HEAD(&chip->pcm_list);
3161 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3162 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3163
3164 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3165 snd_usb_audio_free(chip);
3166 snd_card_free(card);
3167 return err;
3168 }
3169
3170 strcpy(card->driver, "USB-Audio");
3171 sprintf(component, "USB%04x:%04x",
27d10f56 3172 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3173 snd_component_add(card, component);
3174
3175 /* retrieve the device string as shortname */
3176 if (quirk && quirk->product_name) {
3177 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3178 } else {
3179 if (!dev->descriptor.iProduct ||
3180 usb_string(dev, dev->descriptor.iProduct,
3181 card->shortname, sizeof(card->shortname)) <= 0) {
3182 /* no name available from anywhere, so use ID */
3183 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3184 USB_ID_VENDOR(chip->usb_id),
3185 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3186 }
3187 }
3188
3189 /* retrieve the vendor and device strings as longname */
3190 if (quirk && quirk->vendor_name) {
3191 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3192 } else {
3193 if (dev->descriptor.iManufacturer)
3194 len = usb_string(dev, dev->descriptor.iManufacturer,
3195 card->longname, sizeof(card->longname));
3196 else
3197 len = 0;
3198 /* we don't really care if there isn't any vendor string */
3199 }
3200 if (len > 0)
3201 strlcat(card->longname, " ", sizeof(card->longname));
3202
3203 strlcat(card->longname, card->shortname, sizeof(card->longname));
3204
3205 len = strlcat(card->longname, " at ", sizeof(card->longname));
3206
3207 if (len < sizeof(card->longname))
3208 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3209
3210 strlcat(card->longname,
3211 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3212 sizeof(card->longname));
3213
3214 snd_usb_audio_create_proc(chip);
3215
1da177e4
LT		 3216 *rchip = chip;
3217 return 0;
3218}
3219
3220
3221/*
3222 * probe the active usb device
3223 *
3224 * note that this can be called multiple times per a device, when it
3225 * includes multiple audio control interfaces.
3226 *
3227 * thus we check the usb device pointer and creates the card instance
3228 * only at the first time. the successive calls of this function will
3229 * append the pcm interface to the corresponding card.
3230 */
3231static void *snd_usb_audio_probe(struct usb_device *dev,
3232 struct usb_interface *intf,
3233 const struct usb_device_id *usb_id)
3234{
86e07d34 3235 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
1da177e4 3236 int i, err;
86e07d34 3237 struct snd_usb_audio *chip;
1da177e4
LT		 3238 struct usb_host_interface *alts;
3239 int ifnum;
27d10f56 3240 u32 id;
1da177e4
LT		 3241
3242 alts = &intf->altsetting[0];
3243 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3244 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3245 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3246
3247 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3248 goto __err_val;
3249
3250 /* SB Extigy needs special boot-up sequence */
3251 /* if more models come, this will go to the quirk list. */
27d10f56 3252 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3253 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3254 goto __err_val;
1da177e4 3255 }
3a2f0856
CL		 3256 /* SB Audigy 2 NX needs its own boot-up magic, too */
3257 if (id == USB_ID(0x041e, 0x3020)) {
3258 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3259 goto __err_val;
3260 }
1da177e4
LT		 3261
3262 /*
3263 * found a config. now register to ALSA
3264 */
3265
3266 /* check whether it's already registered */
3267 chip = NULL;
3268 down(&register_mutex);
3269 for (i = 0; i < SNDRV_CARDS; i++) {
3270 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3271 if (usb_chip[i]->shutdown) {
3272 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3273 goto __error;
3274 }
3275 chip = usb_chip[i];
3276 break;
3277 }
3278 }
3279 if (! chip) {
3280 /* it's a fresh one.
3281 * now look for an empty slot and create a new card instance
3282 */
1da177e4
LT		 3283 for (i = 0; i < SNDRV_CARDS; i++)
3284 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3285 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3286 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3287 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3288 goto __error;
3289 }
1dcd3ec4 3290 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3291 break;
3292 }
3293 if (! chip) {
3294 snd_printk(KERN_ERR "no available usb audio device\n");
3295 goto __error;
3296 }
3297 }
3298
3299 err = 1; /* continue */
3300 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3301 /* need some special handlings */
3302 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3303 goto __error;
3304 }
3305
3306 if (err > 0) {
3307 /* create normal USB audio interfaces */
3308 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3309 snd_usb_create_mixer(chip, ifnum) < 0) {
3310 goto __error;
3311 }
3312 }
3313
3314 /* we are allowed to call snd_card_register() many times */
3315 if (snd_card_register(chip->card) < 0) {
3316 goto __error;
3317 }
3318
3319 usb_chip[chip->index] = chip;
3320 chip->num_interfaces++;
3321 up(&register_mutex);
3322 return chip;
3323
3324 __error:
3325 if (chip && !chip->num_interfaces)
3326 snd_card_free(chip->card);
3327 up(&register_mutex);
3328 __err_val:
3329 return NULL;
3330}
3331
3332/*
3333 * we need to take care of counter, since disconnection can be called also
3334 * many times as well as usb_audio_probe().
3335 */
3336static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3337{
86e07d34
TI		 3338 struct snd_usb_audio *chip;
3339 struct snd_card *card;
1da177e4
LT		 3340 struct list_head *p;
3341
3342 if (ptr == (void *)-1L)
3343 return;
3344
3345 chip = ptr;
3346 card = chip->card;
3347 down(&register_mutex);
3348 chip->shutdown = 1;
3349 chip->num_interfaces--;
3350 if (chip->num_interfaces <= 0) {
3351 snd_card_disconnect(card);
3352 /* release the pcm resources */
3353 list_for_each(p, &chip->pcm_list) {
ee733397 3354 snd_usb_stream_disconnect(p);
1da177e4
LT		 3355 }
3356 /* release the midi resources */
3357 list_for_each(p, &chip->midi_list) {
ee733397 3358 snd_usbmidi_disconnect(p);
1da177e4 3359 }
84957a8a
CL		 3360 /* release mixer resources */
3361 list_for_each(p, &chip->mixer_list) {
3362 snd_usb_mixer_disconnect(p);
3363 }
1da177e4
LT		 3364 usb_chip[chip->index] = NULL;
3365 up(&register_mutex);
230cd5e2 3366 snd_card_free(card);
1da177e4
LT		 3367 } else {
3368 up(&register_mutex);
3369 }
3370}
3371
3372/*
3373 * new 2.5 USB kernel API
3374 */
3375static int usb_audio_probe(struct usb_interface *intf,
3376 const struct usb_device_id *id)
3377{
3378 void *chip;
3379 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3380 if (chip) {
3381 dev_set_drvdata(&intf->dev, chip);
3382 return 0;
3383 } else
3384 return -EIO;
3385}
3386
3387static void usb_audio_disconnect(struct usb_interface *intf)
3388{
3389 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3390 dev_get_drvdata(&intf->dev));
3391}
3392
3393
3394static int __init snd_usb_audio_init(void)
3395{
3396 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3397 printk(KERN_WARNING "invalid nrpacks value.\n");
3398 return -EINVAL;
3399 }
3400 usb_register(&usb_audio_driver);
3401 return 0;
3402}
3403
3404
3405static void __exit snd_usb_audio_cleanup(void)
3406{
3407 usb_deregister(&usb_audio_driver);
3408}
3409
3410module_init(snd_usb_audio_init);
3411module_exit(snd_usb_audio_cleanup);
Linux kernel - Deliverables
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