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[ALSA] semaphore -> mutex (PCI part)
[mirror_ubuntu-artful-kernel.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
9568f461
CL		 478/* determine the number of frames in the next packet */
479static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
480{
481 if (subs->fill_max)
482 return subs->maxframesize;
483 else {
484 subs->phase = (subs->phase & 0xffff)
485 + (subs->freqm << subs->datainterval);
486 return min(subs->phase >> 16, subs->maxframesize);
487 }
488}
489
b55bbf06
CL		 490/*
491 * Prepare urb for streaming before playback starts.
492 *
4b284928 493 * We don't yet have data, so we send a frame of silence.
b55bbf06 494 */
86e07d34
TI		 495static int prepare_startup_playback_urb(struct snd_usb_substream *subs,
496 struct snd_pcm_runtime *runtime,
b55bbf06
CL		 497 struct urb *urb)
498{
4b284928 499 unsigned int i, offs, counts;
86e07d34 500 struct snd_urb_ctx *ctx = urb->context;
4b284928 501 int stride = runtime->frame_bits >> 3;
b55bbf06 502
4b284928 503 offs = 0;
b55bbf06
CL		 504 urb->dev = ctx->subs->dev;
505 urb->number_of_packets = subs->packs_per_ms;
506 for (i = 0; i < subs->packs_per_ms; ++i) {
9568f461 507 counts = snd_usb_audio_next_packet_size(subs);
4b284928
CL		 508 urb->iso_frame_desc[i].offset = offs * stride;
509 urb->iso_frame_desc[i].length = counts * stride;
510 offs += counts;
b55bbf06 511 }
4b284928
CL		 512 urb->transfer_buffer_length = offs * stride;
513 memset(urb->transfer_buffer,
514 subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
515 offs * stride);
b55bbf06
CL		 516 return 0;
517}
518
1da177e4
LT		 519/*
520 * prepare urb for playback data pipe
521 *
7efd8bc8
CL		 522 * Since a URB can handle only a single linear buffer, we must use double
523 * buffering when the data to be transferred overflows the buffer boundary.
524 * To avoid inconsistencies when updating hwptr_done, we use double buffering
525 * for all URBs.
1da177e4 526 */
86e07d34
TI		 527static int prepare_playback_urb(struct snd_usb_substream *subs,
528 struct snd_pcm_runtime *runtime,
1da177e4
LT		 529 struct urb *urb)
530{
531 int i, stride, offs;
532 unsigned int counts;
533 unsigned long flags;
7efd8bc8 534 int period_elapsed = 0;
86e07d34 535 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4
LT		 536
537 stride = runtime->frame_bits >> 3;
538
539 offs = 0;
540 urb->dev = ctx->subs->dev; /* we need to set this at each time */
541 urb->number_of_packets = 0;
542 spin_lock_irqsave(&subs->lock, flags);
543 for (i = 0; i < ctx->packets; i++) {
9568f461 544 counts = snd_usb_audio_next_packet_size(subs);
1da177e4
LT		 545 /* set up descriptor */
546 urb->iso_frame_desc[i].offset = offs * stride;
547 urb->iso_frame_desc[i].length = counts * stride;
548 offs += counts;
549 urb->number_of_packets++;
7efd8bc8
CL		 550 subs->transfer_done += counts;
551 if (subs->transfer_done >= runtime->period_size) {
552 subs->transfer_done -= runtime->period_size;
553 period_elapsed = 1;
1da177e4 554 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
7efd8bc8
CL		 555 if (subs->transfer_done > 0) {
556 /* FIXME: fill-max mode is not
557 * supported yet */
558 offs -= subs->transfer_done;
559 counts -= subs->transfer_done;
560 urb->iso_frame_desc[i].length =
561 counts * stride;
562 subs->transfer_done = 0;
1da177e4
LT		 563 }
564 i++;
565 if (i < ctx->packets) {
566 /* add a transfer delimiter */
7efd8bc8
CL		 567 urb->iso_frame_desc[i].offset =
568 offs * stride;
1da177e4
LT		 569 urb->iso_frame_desc[i].length = 0;
570 urb->number_of_packets++;
571 }
9624ea81 572 break;
1da177e4 573 }
1da177e4 574 }
9624ea81
CL		 575 /* finish at the frame boundary at/after the period boundary */
576 if (period_elapsed &&
577 (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
578 break;
1da177e4 579 }
7efd8bc8
CL		 580 if (subs->hwptr_done + offs > runtime->buffer_size) {
581 /* err, the transferred area goes over buffer boundary. */
582 unsigned int len = runtime->buffer_size - subs->hwptr_done;
583 memcpy(urb->transfer_buffer,
584 runtime->dma_area + subs->hwptr_done * stride,
585 len * stride);
586 memcpy(urb->transfer_buffer + len * stride,
587 runtime->dma_area,
588 (offs - len) * stride);
1da177e4 589 } else {
7efd8bc8
CL		 590 memcpy(urb->transfer_buffer,
591 runtime->dma_area + subs->hwptr_done * stride,
592 offs * stride);
1da177e4 593 }
7efd8bc8
CL		 594 subs->hwptr_done += offs;
595 if (subs->hwptr_done >= runtime->buffer_size)
596 subs->hwptr_done -= runtime->buffer_size;
1da177e4
LT		 597 spin_unlock_irqrestore(&subs->lock, flags);
598 urb->transfer_buffer_length = offs * stride;
b55bbf06
CL		 599 if (period_elapsed)
600 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 601 return 0;
602}
603
604/*
605 * process after playback data complete
7efd8bc8 606 * - nothing to do
1da177e4 607 */
86e07d34
TI		 608static int retire_playback_urb(struct snd_usb_substream *subs,
609 struct snd_pcm_runtime *runtime,
1da177e4
LT		 610 struct urb *urb)
611{
1da177e4
LT		 612 return 0;
613}
614
615
616/*
617 */
618static struct snd_urb_ops audio_urb_ops[2] = {
619 {
b55bbf06 620 .prepare = prepare_startup_playback_urb,
1da177e4
LT		 621 .retire = retire_playback_urb,
622 .prepare_sync = prepare_playback_sync_urb,
623 .retire_sync = retire_playback_sync_urb,
624 },
625 {
626 .prepare = prepare_capture_urb,
627 .retire = retire_capture_urb,
628 .prepare_sync = prepare_capture_sync_urb,
629 .retire_sync = retire_capture_sync_urb,
630 },
631};
632
633static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
634 {
b55bbf06 635 .prepare = prepare_startup_playback_urb,
1da177e4
LT		 636 .retire = retire_playback_urb,
637 .prepare_sync = prepare_playback_sync_urb_hs,
638 .retire_sync = retire_playback_sync_urb_hs,
639 },
640 {
641 .prepare = prepare_capture_urb,
642 .retire = retire_capture_urb,
643 .prepare_sync = prepare_capture_sync_urb_hs,
644 .retire_sync = retire_capture_sync_urb,
645 },
646};
647
648/*
649 * complete callback from data urb
650 */
651static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
652{
86e07d34
TI		 653 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
654 struct snd_usb_substream *subs = ctx->subs;
655 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 656 int err = 0;
657
658 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
659 ! subs->running || /* can be stopped during retire callback */
660 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
661 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
662 clear_bit(ctx->index, &subs->active_mask);
663 if (err < 0) {
664 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
665 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
666 }
667 }
668}
669
670
671/*
672 * complete callback from sync urb
673 */
674static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
675{
86e07d34
TI		 676 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
677 struct snd_usb_substream *subs = ctx->subs;
678 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 679 int err = 0;
680
681 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
682 ! subs->running || /* can be stopped during retire callback */
683 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
684 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
685 clear_bit(ctx->index + 16, &subs->active_mask);
686 if (err < 0) {
687 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
688 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
689 }
690 }
691}
692
693
6207e51b 694/* get the physical page pointer at the given offset */
86e07d34 695static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
6207e51b
CL		 696 unsigned long offset)
697{
698 void *pageptr = subs->runtime->dma_area + offset;
699 return vmalloc_to_page(pageptr);
700}
701
702/* allocate virtual buffer; may be called more than once */
86e07d34 703static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
6207e51b 704{
86e07d34 705 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b
CL		 706 if (runtime->dma_area) {
707 if (runtime->dma_bytes >= size)
708 return 0; /* already large enough */
b1d5776d 709 vfree(runtime->dma_area);
6207e51b 710 }
b1d5776d 711 runtime->dma_area = vmalloc(size);
6207e51b
CL		 712 if (! runtime->dma_area)
713 return -ENOMEM;
714 runtime->dma_bytes = size;
715 return 0;
716}
717
718/* free virtual buffer; may be called more than once */
86e07d34 719static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
6207e51b 720{
86e07d34 721 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b 722 if (runtime->dma_area) {
b1d5776d 723 vfree(runtime->dma_area);
6207e51b
CL		 724 runtime->dma_area = NULL;
725 }
726 return 0;
727}
728
729
1da177e4
LT		 730/*
731 * unlink active urbs.
732 */
86e07d34 733static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
1da177e4
LT		 734{
735 unsigned int i;
736 int async;
737
738 subs->running = 0;
739
740 if (!force && subs->stream->chip->shutdown) /* to be sure... */
741 return -EBADFD;
742
743 async = !can_sleep && async_unlink;
744
745 if (! async && in_interrupt())
746 return 0;
747
748 for (i = 0; i < subs->nurbs; i++) {
749 if (test_bit(i, &subs->active_mask)) {
750 if (! test_and_set_bit(i, &subs->unlink_mask)) {
751 struct urb *u = subs->dataurb[i].urb;
b375a049 752 if (async)
1da177e4 753 usb_unlink_urb(u);
b375a049 754 else
1da177e4
LT		 755 usb_kill_urb(u);
756 }
757 }
758 }
759 if (subs->syncpipe) {
760 for (i = 0; i < SYNC_URBS; i++) {
761 if (test_bit(i+16, &subs->active_mask)) {
762 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
763 struct urb *u = subs->syncurb[i].urb;
b375a049 764 if (async)
1da177e4 765 usb_unlink_urb(u);
b375a049 766 else
1da177e4
LT		 767 usb_kill_urb(u);
768 }
769 }
770 }
771 }
772 return 0;
773}
774
775
776/*
777 * set up and start data/sync urbs
778 */
86e07d34 779static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
1da177e4
LT		 780{
781 unsigned int i;
782 int err;
783
784 if (subs->stream->chip->shutdown)
785 return -EBADFD;
786
787 for (i = 0; i < subs->nurbs; i++) {
788 snd_assert(subs->dataurb[i].urb, return -EINVAL);
789 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
790 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
791 goto __error;
792 }
793 }
794 if (subs->syncpipe) {
795 for (i = 0; i < SYNC_URBS; i++) {
796 snd_assert(subs->syncurb[i].urb, return -EINVAL);
797 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
798 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
799 goto __error;
800 }
801 }
802 }
803
804 subs->active_mask = 0;
805 subs->unlink_mask = 0;
806 subs->running = 1;
807 for (i = 0; i < subs->nurbs; i++) {
808 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
809 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
810 goto __error;
811 }
812 set_bit(i, &subs->active_mask);
813 }
814 if (subs->syncpipe) {
815 for (i = 0; i < SYNC_URBS; i++) {
816 if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
817 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
818 goto __error;
819 }
820 set_bit(i + 16, &subs->active_mask);
821 }
822 }
823 return 0;
824
825 __error:
826 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
827 deactivate_urbs(subs, 0, 0);
828 return -EPIPE;
829}
830
831
832/*
833 * wait until all urbs are processed.
834 */
86e07d34 835static int wait_clear_urbs(struct snd_usb_substream *subs)
1da177e4 836{
b27c187f 837 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 838 unsigned int i;
839 int alive;
840
841 do {
842 alive = 0;
843 for (i = 0; i < subs->nurbs; i++) {
844 if (test_bit(i, &subs->active_mask))
845 alive++;
846 }
847 if (subs->syncpipe) {
848 for (i = 0; i < SYNC_URBS; i++) {
849 if (test_bit(i + 16, &subs->active_mask))
850 alive++;
851 }
852 }
853 if (! alive)
854 break;
8433a509 855 schedule_timeout_uninterruptible(1);
b27c187f 856 } while (time_before(jiffies, end_time));
1da177e4
LT		 857 if (alive)
858 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
859 return 0;
860}
861
862
863/*
864 * return the current pcm pointer. just return the hwptr_done value.
865 */
86e07d34 866static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 867{
86e07d34 868 struct snd_usb_substream *subs;
daa150ef
CL		 869 snd_pcm_uframes_t hwptr_done;
870
86e07d34 871 subs = (struct snd_usb_substream *)substream->runtime->private_data;
daa150ef
CL		 872 spin_lock(&subs->lock);
873 hwptr_done = subs->hwptr_done;
874 spin_unlock(&subs->lock);
875 return hwptr_done;
1da177e4
LT		 876}
877
878
879/*
b55bbf06 880 * start/stop playback substream
1da177e4 881 */
86e07d34 882static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
b55bbf06 883 int cmd)
1da177e4 884{
86e07d34 885 struct snd_usb_substream *subs = substream->runtime->private_data;
b55bbf06
CL		 886
887 switch (cmd) {
888 case SNDRV_PCM_TRIGGER_START:
889 subs->ops.prepare = prepare_playback_urb;
890 return 0;
891 case SNDRV_PCM_TRIGGER_STOP:
892 return deactivate_urbs(subs, 0, 0);
893 default:
894 return -EINVAL;
895 }
896}
897
898/*
899 * start/stop capture substream
900 */
86e07d34 901static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
b55bbf06
CL		 902 int cmd)
903{
86e07d34 904 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 905
906 switch (cmd) {
907 case SNDRV_PCM_TRIGGER_START:
b55bbf06 908 return start_urbs(subs, substream->runtime);
1da177e4 909 case SNDRV_PCM_TRIGGER_STOP:
b55bbf06 910 return deactivate_urbs(subs, 0, 0);
1da177e4 911 default:
b55bbf06 912 return -EINVAL;
1da177e4 913 }
1da177e4
LT		 914}
915
916
917/*
918 * release a urb data
919 */
86e07d34 920static void release_urb_ctx(struct snd_urb_ctx *u)
1da177e4
LT		 921{
922 if (u->urb) {
55851f73
CL		 923 if (u->buffer_size)
924 usb_buffer_free(u->subs->dev, u->buffer_size,
925 u->urb->transfer_buffer,
926 u->urb->transfer_dma);
1da177e4
LT		 927 usb_free_urb(u->urb);
928 u->urb = NULL;
929 }
1da177e4
LT		 930}
931
932/*
933 * release a substream
934 */
86e07d34 935static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1da177e4
LT		 936{
937 int i;
938
939 /* stop urbs (to be sure) */
940 deactivate_urbs(subs, force, 1);
941 wait_clear_urbs(subs);
942
943 for (i = 0; i < MAX_URBS; i++)
944 release_urb_ctx(&subs->dataurb[i]);
945 for (i = 0; i < SYNC_URBS; i++)
946 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 947 usb_buffer_free(subs->dev, SYNC_URBS * 4,
948 subs->syncbuf, subs->sync_dma);
949 subs->syncbuf = NULL;
1da177e4
LT		 950 subs->nurbs = 0;
951}
952
953/*
954 * initialize a substream for plaback/capture
955 */
86e07d34 956static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1da177e4
LT		 957 unsigned int rate, unsigned int frame_bits)
958{
959 unsigned int maxsize, n, i;
960 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
a93bf990 961 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 962
963 /* calculate the frequency in 16.16 format */
964 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
965 subs->freqn = get_usb_full_speed_rate(rate);
966 else
967 subs->freqn = get_usb_high_speed_rate(rate);
968 subs->freqm = subs->freqn;
573567e0
CL		 969 /* calculate max. frequency */
970 if (subs->maxpacksize) {
971 /* whatever fits into a max. size packet */
1da177e4 972 maxsize = subs->maxpacksize;
573567e0
CL		 973 subs->freqmax = (maxsize / (frame_bits >> 3))
974 << (16 - subs->datainterval);
975 } else {
976 /* no max. packet size: just take 25% higher than nominal */
977 subs->freqmax = subs->freqn + (subs->freqn >> 2);
978 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
979 >> (16 - subs->datainterval);
1da177e4 980 }
573567e0 981 subs->phase = 0;
1da177e4
LT		 982
983 if (subs->fill_max)
984 subs->curpacksize = subs->maxpacksize;
985 else
986 subs->curpacksize = maxsize;
987
a93bf990
CL		 988 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
989 packs_per_ms = 8 >> subs->datainterval;
990 else
991 packs_per_ms = 1;
9624ea81 992 subs->packs_per_ms = packs_per_ms;
a93bf990 993
71d848ca 994 if (is_playback) {
1da177e4 995 urb_packs = nrpacks;
71d848ca
CL		 996 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
997 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
998 } else
15a24c07 999 urb_packs = 1;
a93bf990 1000 urb_packs *= packs_per_ms;
1da177e4 1001
1da177e4 1002 /* decide how many packets to be used */
15a24c07 1003 if (is_playback) {
d6db392e
CL		 1004 unsigned int minsize;
1005 /* determine how small a packet can be */
1006 minsize = (subs->freqn >> (16 - subs->datainterval))
1007 * (frame_bits >> 3);
7efd8bc8 1008 /* with sync from device, assume it can be 12% lower */
d6db392e 1009 if (subs->syncpipe)
7efd8bc8 1010 minsize -= minsize >> 3;
d6db392e
CL		 1011 minsize = max(minsize, 1u);
1012 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990
CL		 1013 /* round up to multiple of packs_per_ms */
1014 total_packs = (total_packs + packs_per_ms - 1)
1015 & ~(packs_per_ms - 1);
1016 /* we need at least two URBs for queueing */
1017 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
1018 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
15a24c07
CL		 1019 } else {
1020 total_packs = MAX_URBS * urb_packs;
1021 }
1da177e4
LT		 1022 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1023 if (subs->nurbs > MAX_URBS) {
1024 /* too much... */
1025 subs->nurbs = MAX_URBS;
1026 total_packs = MAX_URBS * urb_packs;
1027 }
1028 n = total_packs;
1029 for (i = 0; i < subs->nurbs; i++) {
1030 npacks[i] = n > urb_packs ? urb_packs : n;
1031 n -= urb_packs;
1032 }
1033 if (subs->nurbs <= 1) {
1034 /* too little - we need at least two packets
1035 * to ensure contiguous playback/capture
1036 */
1037 subs->nurbs = 2;
1038 npacks[0] = (total_packs + 1) / 2;
1039 npacks[1] = total_packs - npacks[0];
a93bf990 1040 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1da177e4
LT		 1041 /* the last packet is too small.. */
1042 if (subs->nurbs > 2) {
1043 /* merge to the first one */
1044 npacks[0] += npacks[subs->nurbs - 1];
1045 subs->nurbs--;
1046 } else {
1047 /* divide to two */
1048 subs->nurbs = 2;
1049 npacks[0] = (total_packs + 1) / 2;
1050 npacks[1] = total_packs - npacks[0];
1051 }
1052 }
1053
1054 /* allocate and initialize data urbs */
1055 for (i = 0; i < subs->nurbs; i++) {
86e07d34 1056 struct snd_urb_ctx *u = &subs->dataurb[i];
1da177e4
LT		 1057 u->index = i;
1058 u->subs = subs;
1da177e4 1059 u->packets = npacks[i];
55851f73 1060 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1061 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1062 u->packets++; /* for transfer delimiter */
1da177e4 1063 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
55851f73
CL		 1064 if (! u->urb)
1065 goto out_of_memory;
1066 u->urb->transfer_buffer =
1067 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1068 &u->urb->transfer_dma);
1069 if (! u->urb->transfer_buffer)
1070 goto out_of_memory;
1da177e4 1071 u->urb->pipe = subs->datapipe;
55851f73 1072 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1073 u->urb->interval = 1 << subs->datainterval;
1da177e4 1074 u->urb->context = u;
3527a008 1075 u->urb->complete = snd_complete_urb;
1da177e4
LT		 1076 }
1077
1078 if (subs->syncpipe) {
1079 /* allocate and initialize sync urbs */
55851f73
CL		 1080 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1081 GFP_KERNEL, &subs->sync_dma);
1082 if (! subs->syncbuf)
1083 goto out_of_memory;
1da177e4 1084 for (i = 0; i < SYNC_URBS; i++) {
86e07d34 1085 struct snd_urb_ctx *u = &subs->syncurb[i];
1da177e4
LT		 1086 u->index = i;
1087 u->subs = subs;
ca81090a
CL		 1088 u->packets = 1;
1089 u->urb = usb_alloc_urb(1, GFP_KERNEL);
55851f73
CL		 1090 if (! u->urb)
1091 goto out_of_memory;
ca81090a 1092 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1093 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1094 u->urb->transfer_buffer_length = 4;
1da177e4 1095 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1096 u->urb->transfer_flags = URB_ISO_ASAP |
1097 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1098 u->urb->number_of_packets = 1;
1149a64f 1099 u->urb->interval = 1 << subs->syncinterval;
1da177e4 1100 u->urb->context = u;
3527a008 1101 u->urb->complete = snd_complete_sync_urb;
1da177e4
LT		 1102 }
1103 }
1104 return 0;
55851f73
CL		 1105
1106out_of_memory:
1107 release_substream_urbs(subs, 0);
1108 return -ENOMEM;
1da177e4
LT		 1109}
1110
1111
1112/*
1113 * find a matching audio format
1114 */
86e07d34 1115static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1da177e4
LT		 1116 unsigned int rate, unsigned int channels)
1117{
1118 struct list_head *p;
1119 struct audioformat *found = NULL;
1120 int cur_attr = 0, attr;
1121
1122 list_for_each(p, &subs->fmt_list) {
1123 struct audioformat *fp;
1124 fp = list_entry(p, struct audioformat, list);
1125 if (fp->format != format || fp->channels != channels)
1126 continue;
1127 if (rate < fp->rate_min || rate > fp->rate_max)
1128 continue;
1129 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1130 unsigned int i;
1131 for (i = 0; i < fp->nr_rates; i++)
1132 if (fp->rate_table[i] == rate)
1133 break;
1134 if (i >= fp->nr_rates)
1135 continue;
1136 }
1137 attr = fp->ep_attr & EP_ATTR_MASK;
1138 if (! found) {
1139 found = fp;
1140 cur_attr = attr;
1141 continue;
1142 }
1143 /* avoid async out and adaptive in if the other method
1144 * supports the same format.
1145 * this is a workaround for the case like
1146 * M-audio audiophile USB.
1147 */
1148 if (attr != cur_attr) {
1149 if ((attr == EP_ATTR_ASYNC &&
1150 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1151 (attr == EP_ATTR_ADAPTIVE &&
1152 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1153 continue;
1154 if ((cur_attr == EP_ATTR_ASYNC &&
1155 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1156 (cur_attr == EP_ATTR_ADAPTIVE &&
1157 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1158 found = fp;
1159 cur_attr = attr;
1160 continue;
1161 }
1162 }
1163 /* find the format with the largest max. packet size */
1164 if (fp->maxpacksize > found->maxpacksize) {
1165 found = fp;
1166 cur_attr = attr;
1167 }
1168 }
1169 return found;
1170}
1171
1172
1173/*
1174 * initialize the picth control and sample rate
1175 */
1176static int init_usb_pitch(struct usb_device *dev, int iface,
1177 struct usb_host_interface *alts,
1178 struct audioformat *fmt)
1179{
1180 unsigned int ep;
1181 unsigned char data[1];
1182 int err;
1183
1184 ep = get_endpoint(alts, 0)->bEndpointAddress;
1185 /* if endpoint has pitch control, enable it */
1186 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1187 data[0] = 1;
1188 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1189 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1190 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1191 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1192 dev->devnum, iface, ep);
1193 return err;
1194 }
1195 }
1196 return 0;
1197}
1198
1199static int init_usb_sample_rate(struct usb_device *dev, int iface,
1200 struct usb_host_interface *alts,
1201 struct audioformat *fmt, int rate)
1202{
1203 unsigned int ep;
1204 unsigned char data[3];
1205 int err;
1206
1207 ep = get_endpoint(alts, 0)->bEndpointAddress;
1208 /* if endpoint has sampling rate control, set it */
1209 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1210 int crate;
1211 data[0] = rate;
1212 data[1] = rate >> 8;
1213 data[2] = rate >> 16;
1214 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1215 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1216 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1217 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1218 dev->devnum, iface, fmt->altsetting, rate, ep);
1219 return err;
1220 }
1221 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1222 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1223 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1224 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1225 dev->devnum, iface, fmt->altsetting, ep);
1226 return 0; /* some devices don't support reading */
1227 }
1228 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1229 if (crate != rate) {
1230 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1231 // runtime->rate = crate;
1232 }
1233 }
1234 return 0;
1235}
1236
1237/*
1238 * find a matching format and set up the interface
1239 */
86e07d34 1240static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1da177e4
LT		 1241{
1242 struct usb_device *dev = subs->dev;
1243 struct usb_host_interface *alts;
1244 struct usb_interface_descriptor *altsd;
1245 struct usb_interface *iface;
1246 unsigned int ep, attr;
1247 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1248 int err;
1249
1250 iface = usb_ifnum_to_if(dev, fmt->iface);
1251 snd_assert(iface, return -EINVAL);
1252 alts = &iface->altsetting[fmt->altset_idx];
1253 altsd = get_iface_desc(alts);
1254 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1255
1256 if (fmt == subs->cur_audiofmt)
1257 return 0;
1258
1259 /* close the old interface */
1260 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1261 usb_set_interface(subs->dev, subs->interface, 0);
1262 subs->interface = -1;
1263 subs->format = 0;
1264 }
1265
1266 /* set interface */
1267 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1268 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1269 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1270 dev->devnum, fmt->iface, fmt->altsetting);
1271 return -EIO;
1272 }
1273 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1274 subs->interface = fmt->iface;
1275 subs->format = fmt->altset_idx;
1276 }
1277
1278 /* create a data pipe */
1279 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1280 if (is_playback)
1281 subs->datapipe = usb_sndisocpipe(dev, ep);
1282 else
1283 subs->datapipe = usb_rcvisocpipe(dev, ep);
573567e0
CL		 1284 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1285 get_endpoint(alts, 0)->bInterval >= 1 &&
1286 get_endpoint(alts, 0)->bInterval <= 4)
1287 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1288 else
1289 subs->datainterval = 0;
1da177e4
LT		 1290 subs->syncpipe = subs->syncinterval = 0;
1291 subs->maxpacksize = fmt->maxpacksize;
1292 subs->fill_max = 0;
1293
1294 /* we need a sync pipe in async OUT or adaptive IN mode */
1295 /* check the number of EP, since some devices have broken
1296 * descriptors which fool us. if it has only one EP,
1297 * assume it as adaptive-out or sync-in.
1298 */
1299 attr = fmt->ep_attr & EP_ATTR_MASK;
1300 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1301 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1302 altsd->bNumEndpoints >= 2) {
1303 /* check sync-pipe endpoint */
1304 /* ... and check descriptor size before accessing bSynchAddress
1305 because there is a version of the SB Audigy 2 NX firmware lacking
1306 the audio fields in the endpoint descriptors */
1307 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1308 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1309 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1310 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1311 dev->devnum, fmt->iface, fmt->altsetting);
1312 return -EINVAL;
1313 }
1314 ep = get_endpoint(alts, 1)->bEndpointAddress;
1315 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1316 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1317 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1318 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1319 dev->devnum, fmt->iface, fmt->altsetting);
1320 return -EINVAL;
1321 }
1322 ep &= USB_ENDPOINT_NUMBER_MASK;
1323 if (is_playback)
1324 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1325 else
1326 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1327 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1328 get_endpoint(alts, 1)->bRefresh >= 1 &&
1329 get_endpoint(alts, 1)->bRefresh <= 9)
1330 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1331 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1332 subs->syncinterval = 1;
604cf499
CL		 1333 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1334 get_endpoint(alts, 1)->bInterval <= 16)
1335 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1336 else
1337 subs->syncinterval = 3;
1da177e4
LT		 1338 }
1339
1340 /* always fill max packet size */
1341 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1342 subs->fill_max = 1;
1343
1344 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1345 return err;
1346
1347 subs->cur_audiofmt = fmt;
1348
1349#if 0
1350 printk("setting done: format = %d, rate = %d, channels = %d\n",
1351 fmt->format, fmt->rate, fmt->channels);
1352 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1353 subs->datapipe, subs->syncpipe);
1354#endif
1355
1356 return 0;
1357}
1358
1359/*
1360 * hw_params callback
1361 *
1362 * allocate a buffer and set the given audio format.
1363 *
1364 * so far we use a physically linear buffer although packetize transfer
1365 * doesn't need a continuous area.
1366 * if sg buffer is supported on the later version of alsa, we'll follow
1367 * that.
1368 */
86e07d34
TI		 1369static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1370 struct snd_pcm_hw_params *hw_params)
1da177e4 1371{
86e07d34 1372 struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
1da177e4
LT		 1373 struct audioformat *fmt;
1374 unsigned int channels, rate, format;
1375 int ret, changed;
1376
6207e51b
CL		 1377 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1378 params_buffer_bytes(hw_params));
1da177e4
LT		 1379 if (ret < 0)
1380 return ret;
1381
1382 format = params_format(hw_params);
1383 rate = params_rate(hw_params);
1384 channels = params_channels(hw_params);
1385 fmt = find_format(subs, format, rate, channels);
1386 if (! fmt) {
21a3479a
JK		 1387 snd_printd(KERN_DEBUG "cannot set format: format = 0x%x, rate = %d, channels = %d\n",
1388 format, rate, channels);
1da177e4
LT		 1389 return -EINVAL;
1390 }
1391
1392 changed = subs->cur_audiofmt != fmt ||
1393 subs->period_bytes != params_period_bytes(hw_params) ||
1394 subs->cur_rate != rate;
1395 if ((ret = set_format(subs, fmt)) < 0)
1396 return ret;
1397
1398 if (subs->cur_rate != rate) {
1399 struct usb_host_interface *alts;
1400 struct usb_interface *iface;
1401 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1402 alts = &iface->altsetting[fmt->altset_idx];
1403 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1404 if (ret < 0)
1405 return ret;
1406 subs->cur_rate = rate;
1407 }
1408
1409 if (changed) {
1410 /* format changed */
1411 release_substream_urbs(subs, 0);
1412 /* influenced: period_bytes, channels, rate, format, */
1413 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1414 params_rate(hw_params),
1415 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1416 }
1417
1418 return ret;
1419}
1420
1421/*
1422 * hw_free callback
1423 *
1424 * reset the audio format and release the buffer
1425 */
86e07d34 1426static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1da177e4 1427{
86e07d34 1428 struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
1da177e4
LT		 1429
1430 subs->cur_audiofmt = NULL;
1431 subs->cur_rate = 0;
1432 subs->period_bytes = 0;
1433 release_substream_urbs(subs, 0);
6207e51b 1434 return snd_pcm_free_vmalloc_buffer(substream);
1da177e4
LT		 1435}
1436
1437/*
1438 * prepare callback
1439 *
1440 * only a few subtle things...
1441 */
86e07d34 1442static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 1443{
86e07d34
TI		 1444 struct snd_pcm_runtime *runtime = substream->runtime;
1445 struct snd_usb_substream *subs = runtime->private_data;
1da177e4
LT		 1446
1447 if (! subs->cur_audiofmt) {
1448 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1449 return -ENXIO;
1450 }
1451
1452 /* some unit conversions in runtime */
1453 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1454 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1455
1456 /* reset the pointer */
1da177e4 1457 subs->hwptr_done = 0;
1da177e4
LT		 1458 subs->transfer_done = 0;
1459 subs->phase = 0;
1460
1461 /* clear urbs (to be sure) */
1462 deactivate_urbs(subs, 0, 1);
1463 wait_clear_urbs(subs);
1464
b55bbf06
CL		 1465 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1466 * updates for all URBs would happen at the same time when starting */
1467 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1468 subs->ops.prepare = prepare_startup_playback_urb;
1469 return start_urbs(subs, runtime);
1470 } else
1471 return 0;
1da177e4
LT		 1472}
1473
86e07d34 1474static struct snd_pcm_hardware snd_usb_playback =
1da177e4 1475{
49045d3d
CL		 1476 .info = SNDRV_PCM_INFO_MMAP |
1477 SNDRV_PCM_INFO_MMAP_VALID |
1478 SNDRV_PCM_INFO_BATCH |
1479 SNDRV_PCM_INFO_INTERLEAVED |
1480 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1481 .buffer_bytes_max = 1024 * 1024,
1da177e4 1482 .period_bytes_min = 64,
d31cbbfd 1483 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1484 .periods_min = 2,
1485 .periods_max = 1024,
1486};
1487
86e07d34 1488static struct snd_pcm_hardware snd_usb_capture =
1da177e4 1489{
49045d3d
CL		 1490 .info = SNDRV_PCM_INFO_MMAP |
1491 SNDRV_PCM_INFO_MMAP_VALID |
1492 SNDRV_PCM_INFO_BATCH |
1493 SNDRV_PCM_INFO_INTERLEAVED |
1494 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1495 .buffer_bytes_max = 1024 * 1024,
1da177e4 1496 .period_bytes_min = 64,
d31cbbfd 1497 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1498 .periods_min = 2,
1499 .periods_max = 1024,
1500};
1501
1502/*
1503 * h/w constraints
1504 */
1505
1506#ifdef HW_CONST_DEBUG
1507#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1508#else
1509#define hwc_debug(fmt, args...) /**/
1510#endif
1511
86e07d34 1512static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
1da177e4 1513{
86e07d34
TI		 1514 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1515 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1516 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1517
1518 /* check the format */
1519 if (! snd_mask_test(fmts, fp->format)) {
1520 hwc_debug(" > check: no supported format %d\n", fp->format);
1521 return 0;
1522 }
1523 /* check the channels */
1524 if (fp->channels < ct->min || fp->channels > ct->max) {
1525 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1526 return 0;
1527 }
1528 /* check the rate is within the range */
1529 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1530 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1531 return 0;
1532 }
1533 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1534 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1535 return 0;
1536 }
1537 return 1;
1538}
1539
86e07d34
TI		 1540static int hw_rule_rate(struct snd_pcm_hw_params *params,
1541 struct snd_pcm_hw_rule *rule)
1da177e4 1542{
86e07d34 1543 struct snd_usb_substream *subs = rule->private;
1da177e4 1544 struct list_head *p;
86e07d34 1545 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 1546 unsigned int rmin, rmax;
1547 int changed;
1548
1549 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1550 changed = 0;
1551 rmin = rmax = 0;
1552 list_for_each(p, &subs->fmt_list) {
1553 struct audioformat *fp;
1554 fp = list_entry(p, struct audioformat, list);
1555 if (! hw_check_valid_format(params, fp))
1556 continue;
1557 if (changed++) {
1558 if (rmin > fp->rate_min)
1559 rmin = fp->rate_min;
1560 if (rmax < fp->rate_max)
1561 rmax = fp->rate_max;
1562 } else {
1563 rmin = fp->rate_min;
1564 rmax = fp->rate_max;
1565 }
1566 }
1567
1568 if (! changed) {
1569 hwc_debug(" --> get empty\n");
1570 it->empty = 1;
1571 return -EINVAL;
1572 }
1573
1574 changed = 0;
1575 if (it->min < rmin) {
1576 it->min = rmin;
1577 it->openmin = 0;
1578 changed = 1;
1579 }
1580 if (it->max > rmax) {
1581 it->max = rmax;
1582 it->openmax = 0;
1583 changed = 1;
1584 }
1585 if (snd_interval_checkempty(it)) {
1586 it->empty = 1;
1587 return -EINVAL;
1588 }
1589 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1590 return changed;
1591}
1592
1593
86e07d34
TI		 1594static int hw_rule_channels(struct snd_pcm_hw_params *params,
1595 struct snd_pcm_hw_rule *rule)
1da177e4 1596{
86e07d34 1597 struct snd_usb_substream *subs = rule->private;
1da177e4 1598 struct list_head *p;
86e07d34 1599 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1da177e4
LT		 1600 unsigned int rmin, rmax;
1601 int changed;
1602
1603 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1604 changed = 0;
1605 rmin = rmax = 0;
1606 list_for_each(p, &subs->fmt_list) {
1607 struct audioformat *fp;
1608 fp = list_entry(p, struct audioformat, list);
1609 if (! hw_check_valid_format(params, fp))
1610 continue;
1611 if (changed++) {
1612 if (rmin > fp->channels)
1613 rmin = fp->channels;
1614 if (rmax < fp->channels)
1615 rmax = fp->channels;
1616 } else {
1617 rmin = fp->channels;
1618 rmax = fp->channels;
1619 }
1620 }
1621
1622 if (! changed) {
1623 hwc_debug(" --> get empty\n");
1624 it->empty = 1;
1625 return -EINVAL;
1626 }
1627
1628 changed = 0;
1629 if (it->min < rmin) {
1630 it->min = rmin;
1631 it->openmin = 0;
1632 changed = 1;
1633 }
1634 if (it->max > rmax) {
1635 it->max = rmax;
1636 it->openmax = 0;
1637 changed = 1;
1638 }
1639 if (snd_interval_checkempty(it)) {
1640 it->empty = 1;
1641 return -EINVAL;
1642 }
1643 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1644 return changed;
1645}
1646
86e07d34
TI		 1647static int hw_rule_format(struct snd_pcm_hw_params *params,
1648 struct snd_pcm_hw_rule *rule)
1da177e4 1649{
86e07d34 1650 struct snd_usb_substream *subs = rule->private;
1da177e4 1651 struct list_head *p;
86e07d34 1652 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1653 u64 fbits;
1654 u32 oldbits[2];
1655 int changed;
1656
1657 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1658 fbits = 0;
1659 list_for_each(p, &subs->fmt_list) {
1660 struct audioformat *fp;
1661 fp = list_entry(p, struct audioformat, list);
1662 if (! hw_check_valid_format(params, fp))
1663 continue;
1664 fbits |= (1ULL << fp->format);
1665 }
1666
1667 oldbits[0] = fmt->bits[0];
1668 oldbits[1] = fmt->bits[1];
1669 fmt->bits[0] &= (u32)fbits;
1670 fmt->bits[1] &= (u32)(fbits >> 32);
1671 if (! fmt->bits[0] && ! fmt->bits[1]) {
1672 hwc_debug(" --> get empty\n");
1673 return -EINVAL;
1674 }
1675 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1676 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1677 return changed;
1678}
1679
1680#define MAX_MASK 64
1681
1682/*
1683 * check whether the registered audio formats need special hw-constraints
1684 */
86e07d34 1685static int check_hw_params_convention(struct snd_usb_substream *subs)
1da177e4
LT		 1686{
1687 int i;
1688 u32 *channels;
1689 u32 *rates;
1690 u32 cmaster, rmaster;
1691 u32 rate_min = 0, rate_max = 0;
1692 struct list_head *p;
1693 int err = 1;
1694
1695 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1696 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1697
1698 list_for_each(p, &subs->fmt_list) {
1699 struct audioformat *f;
1700 f = list_entry(p, struct audioformat, list);
1701 /* unconventional channels? */
1702 if (f->channels > 32)
1703 goto __out;
1704 /* continuous rate min/max matches? */
1705 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1706 if (rate_min && f->rate_min != rate_min)
1707 goto __out;
1708 if (rate_max && f->rate_max != rate_max)
1709 goto __out;
1710 rate_min = f->rate_min;
1711 rate_max = f->rate_max;
1712 }
1713 /* combination of continuous rates and fixed rates? */
1714 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1715 if (f->rates != rates[f->format])
1716 goto __out;
1717 }
1718 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1719 if (rates[f->format] && rates[f->format] != f->rates)
1720 goto __out;
1721 }
1722 channels[f->format] |= (1 << f->channels);
1723 rates[f->format] |= f->rates;
1724 }
1725 /* check whether channels and rates match for all formats */
1726 cmaster = rmaster = 0;
1727 for (i = 0; i < MAX_MASK; i++) {
1728 if (cmaster != channels[i] && cmaster && channels[i])
1729 goto __out;
1730 if (rmaster != rates[i] && rmaster && rates[i])
1731 goto __out;
1732 if (channels[i])
1733 cmaster = channels[i];
1734 if (rates[i])
1735 rmaster = rates[i];
1736 }
1737 /* check whether channels match for all distinct rates */
1738 memset(channels, 0, MAX_MASK * sizeof(u32));
1739 list_for_each(p, &subs->fmt_list) {
1740 struct audioformat *f;
1741 f = list_entry(p, struct audioformat, list);
1742 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1743 continue;
1744 for (i = 0; i < 32; i++) {
1745 if (f->rates & (1 << i))
1746 channels[i] |= (1 << f->channels);
1747 }
1748 }
1749 cmaster = 0;
1750 for (i = 0; i < 32; i++) {
1751 if (cmaster != channels[i] && cmaster && channels[i])
1752 goto __out;
1753 if (channels[i])
1754 cmaster = channels[i];
1755 }
1756 err = 0;
1757
1758 __out:
1759 kfree(channels);
1760 kfree(rates);
1761 return err;
1762}
1763
1764
1765/*
1766 * set up the runtime hardware information.
1767 */
1768
86e07d34 1769static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1da177e4
LT		 1770{
1771 struct list_head *p;
1772 int err;
1773
1774 runtime->hw.formats = subs->formats;
1775
1776 runtime->hw.rate_min = 0x7fffffff;
1777 runtime->hw.rate_max = 0;
1778 runtime->hw.channels_min = 256;
1779 runtime->hw.channels_max = 0;
1780 runtime->hw.rates = 0;
1781 /* check min/max rates and channels */
1782 list_for_each(p, &subs->fmt_list) {
1783 struct audioformat *fp;
1784 fp = list_entry(p, struct audioformat, list);
1785 runtime->hw.rates |= fp->rates;
1786 if (runtime->hw.rate_min > fp->rate_min)
1787 runtime->hw.rate_min = fp->rate_min;
1788 if (runtime->hw.rate_max < fp->rate_max)
1789 runtime->hw.rate_max = fp->rate_max;
1790 if (runtime->hw.channels_min > fp->channels)
1791 runtime->hw.channels_min = fp->channels;
1792 if (runtime->hw.channels_max < fp->channels)
1793 runtime->hw.channels_max = fp->channels;
1794 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1795 /* FIXME: there might be more than one audio formats... */
1796 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1797 fp->frame_size;
1798 }
1799 }
1800
1801 /* set the period time minimum 1ms */
1802 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1803 1000 * MIN_PACKS_URB,
1804 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1805
1806 if (check_hw_params_convention(subs)) {
1807 hwc_debug("setting extra hw constraints...\n");
1808 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1809 hw_rule_rate, subs,
1810 SNDRV_PCM_HW_PARAM_FORMAT,
1811 SNDRV_PCM_HW_PARAM_CHANNELS,
1812 -1)) < 0)
1813 return err;
1814 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1815 hw_rule_channels, subs,
1816 SNDRV_PCM_HW_PARAM_FORMAT,
1817 SNDRV_PCM_HW_PARAM_RATE,
1818 -1)) < 0)
1819 return err;
1820 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1821 hw_rule_format, subs,
1822 SNDRV_PCM_HW_PARAM_RATE,
1823 SNDRV_PCM_HW_PARAM_CHANNELS,
1824 -1)) < 0)
1825 return err;
1826 }
1827 return 0;
1828}
1829
86e07d34
TI		 1830static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction,
1831 struct snd_pcm_hardware *hw)
1da177e4 1832{
86e07d34
TI		 1833 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1834 struct snd_pcm_runtime *runtime = substream->runtime;
1835 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1836
1837 subs->interface = -1;
1838 subs->format = 0;
1839 runtime->hw = *hw;
1840 runtime->private_data = subs;
1841 subs->pcm_substream = substream;
1842 return setup_hw_info(runtime, subs);
1843}
1844
86e07d34 1845static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1da177e4 1846{
86e07d34
TI		 1847 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1848 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1849
1850 if (subs->interface >= 0) {
1851 usb_set_interface(subs->dev, subs->interface, 0);
1852 subs->interface = -1;
1853 }
1854 subs->pcm_substream = NULL;
1855 return 0;
1856}
1857
86e07d34 1858static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1da177e4
LT		 1859{
1860 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1861}
1862
86e07d34 1863static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1864{
1865 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1866}
1867
86e07d34 1868static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1da177e4
LT		 1869{
1870 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1871}
1872
86e07d34 1873static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1874{
1875 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1876}
1877
86e07d34 1878static struct snd_pcm_ops snd_usb_playback_ops = {
1da177e4
LT		 1879 .open = snd_usb_playback_open,
1880 .close = snd_usb_playback_close,
1881 .ioctl = snd_pcm_lib_ioctl,
1882 .hw_params = snd_usb_hw_params,
1883 .hw_free = snd_usb_hw_free,
1884 .prepare = snd_usb_pcm_prepare,
b55bbf06 1885 .trigger = snd_usb_pcm_playback_trigger,
1da177e4 1886 .pointer = snd_usb_pcm_pointer,
6207e51b 1887 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1888};
1889
86e07d34 1890static struct snd_pcm_ops snd_usb_capture_ops = {
1da177e4
LT		 1891 .open = snd_usb_capture_open,
1892 .close = snd_usb_capture_close,
1893 .ioctl = snd_pcm_lib_ioctl,
1894 .hw_params = snd_usb_hw_params,
1895 .hw_free = snd_usb_hw_free,
1896 .prepare = snd_usb_pcm_prepare,
b55bbf06 1897 .trigger = snd_usb_pcm_capture_trigger,
1da177e4 1898 .pointer = snd_usb_pcm_pointer,
6207e51b 1899 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1900};
1901
1902
1903
1904/*
1905 * helper functions
1906 */
1907
1908/*
1909 * combine bytes and get an integer value
1910 */
1911unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1912{
1913 switch (size) {
1914 case 1: return *bytes;
1915 case 2: return combine_word(bytes);
1916 case 3: return combine_triple(bytes);
1917 case 4: return combine_quad(bytes);
1918 default: return 0;
1919 }
1920}
1921
1922/*
1923 * parse descriptor buffer and return the pointer starting the given
1924 * descriptor type.
1925 */
1926void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1927{
1928 u8 *p, *end, *next;
1929
1930 p = descstart;
1931 end = p + desclen;
1932 for (; p < end;) {
1933 if (p[0] < 2)
1934 return NULL;
1935 next = p + p[0];
1936 if (next > end)
1937 return NULL;
1938 if (p[1] == dtype && (!after || (void *)p > after)) {
1939 return p;
1940 }
1941 p = next;
1942 }
1943 return NULL;
1944}
1945
1946/*
1947 * find a class-specified interface descriptor with the given subtype.
1948 */
1949void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1950{
1951 unsigned char *p = after;
1952
1953 while ((p = snd_usb_find_desc(buffer, buflen, p,
1954 USB_DT_CS_INTERFACE)) != NULL) {
1955 if (p[0] >= 3 && p[2] == dsubtype)
1956 return p;
1957 }
1958 return NULL;
1959}
1960
1961/*
1962 * Wrapper for usb_control_msg().
1963 * Allocates a temp buffer to prevent dmaing from/to the stack.
1964 */
1965int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1966 __u8 requesttype, __u16 value, __u16 index, void *data,
1967 __u16 size, int timeout)
1968{
1969 int err;
1970 void *buf = NULL;
1971
1972 if (size > 0) {
1973 buf = kmalloc(size, GFP_KERNEL);
1974 if (!buf)
1975 return -ENOMEM;
1976 memcpy(buf, data, size);
1977 }
1978 err = usb_control_msg(dev, pipe, request, requesttype,
1979 value, index, buf, size, timeout);
1980 if (size > 0) {
1981 memcpy(data, buf, size);
1982 kfree(buf);
1983 }
1984 return err;
1985}
1986
1987
1988/*
1989 * entry point for linux usb interface
1990 */
1991
1992static int usb_audio_probe(struct usb_interface *intf,
1993 const struct usb_device_id *id);
1994static void usb_audio_disconnect(struct usb_interface *intf);
1995
1996static struct usb_device_id usb_audio_ids [] = {
1997#include "usbquirks.h"
1998 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1999 .bInterfaceClass = USB_CLASS_AUDIO,
2000 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
2001 { } /* Terminating entry */
2002};
2003
2004MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2005
2006static struct usb_driver usb_audio_driver = {
1da177e4
LT		 2007 .name = "snd-usb-audio",
2008 .probe = usb_audio_probe,
2009 .disconnect = usb_audio_disconnect,
2010 .id_table = usb_audio_ids,
2011};
2012
2013
21a3479a
JK		 2014#if defined(CONFIG_PROCFS) && defined(CONFIG_SND_VERBOSE_PROCFS)
2015
1da177e4
LT		 2016/*
2017 * proc interface for list the supported pcm formats
2018 */
86e07d34 2019static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2020{
2021 struct list_head *p;
2022 static char *sync_types[4] = {
2023 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2024 };
2025
2026 list_for_each(p, &subs->fmt_list) {
2027 struct audioformat *fp;
2028 fp = list_entry(p, struct audioformat, list);
2029 snd_iprintf(buffer, " Interface %d\n", fp->iface);
2030 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
2031 snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
2032 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
2033 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
2034 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2035 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2036 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2037 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2038 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2039 fp->rate_min, fp->rate_max);
2040 } else {
2041 unsigned int i;
2042 snd_iprintf(buffer, " Rates: ");
2043 for (i = 0; i < fp->nr_rates; i++) {
2044 if (i > 0)
2045 snd_iprintf(buffer, ", ");
2046 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2047 }
2048 snd_iprintf(buffer, "\n");
2049 }
2050 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2051 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2052 }
2053}
2054
86e07d34 2055static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2056{
2057 if (subs->running) {
2058 unsigned int i;
2059 snd_iprintf(buffer, " Status: Running\n");
2060 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2061 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2062 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2063 for (i = 0; i < subs->nurbs; i++)
2064 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2065 snd_iprintf(buffer, "]\n");
2066 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2067 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2068 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2069 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2070 : get_high_speed_hz(subs->freqm),
2071 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2072 } else {
2073 snd_iprintf(buffer, " Status: Stop\n");
2074 }
2075}
2076
86e07d34 2077static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 2078{
86e07d34 2079 struct snd_usb_stream *stream = entry->private_data;
1da177e4
LT		 2080
2081 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2082
2083 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2084 snd_iprintf(buffer, "\nPlayback:\n");
2085 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2086 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2087 }
2088 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2089 snd_iprintf(buffer, "\nCapture:\n");
2090 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2091 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2092 }
2093}
2094
86e07d34 2095static void proc_pcm_format_add(struct snd_usb_stream *stream)
1da177e4 2096{
86e07d34 2097 struct snd_info_entry *entry;
1da177e4 2098 char name[32];
86e07d34 2099 struct snd_card *card = stream->chip->card;
1da177e4
LT		 2100
2101 sprintf(name, "stream%d", stream->pcm_index);
2102 if (! snd_card_proc_new(card, name, &entry))
2103 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2104}
2105
21a3479a
JK		 2106#else
2107
2108static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
2109{
2110}
2111
2112#endif
1da177e4
LT		 2113
2114/*
2115 * initialize the substream instance.
2116 */
2117
86e07d34 2118static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
1da177e4 2119{
86e07d34 2120 struct snd_usb_substream *subs = &as->substream[stream];
1da177e4
LT		 2121
2122 INIT_LIST_HEAD(&subs->fmt_list);
2123 spin_lock_init(&subs->lock);
2124
2125 subs->stream = as;
2126 subs->direction = stream;
2127 subs->dev = as->chip->dev;
2128 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2129 subs->ops = audio_urb_ops[stream];
2130 else
2131 subs->ops = audio_urb_ops_high_speed[stream];
1da177e4
LT		 2132 snd_pcm_set_ops(as->pcm, stream,
2133 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2134 &snd_usb_playback_ops : &snd_usb_capture_ops);
2135
2136 list_add_tail(&fp->list, &subs->fmt_list);
2137 subs->formats |= 1ULL << fp->format;
2138 subs->endpoint = fp->endpoint;
2139 subs->num_formats++;
2140 subs->fmt_type = fp->fmt_type;
2141}
2142
2143
2144/*
2145 * free a substream
2146 */
86e07d34 2147static void free_substream(struct snd_usb_substream *subs)
1da177e4
LT		 2148{
2149 struct list_head *p, *n;
2150
2151 if (! subs->num_formats)
2152 return; /* not initialized */
2153 list_for_each_safe(p, n, &subs->fmt_list) {
2154 struct audioformat *fp = list_entry(p, struct audioformat, list);
2155 kfree(fp->rate_table);
2156 kfree(fp);
2157 }
2158}
2159
2160
2161/*
2162 * free a usb stream instance
2163 */
86e07d34 2164static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
1da177e4
LT		 2165{
2166 free_substream(&stream->substream[0]);
2167 free_substream(&stream->substream[1]);
2168 list_del(&stream->list);
2169 kfree(stream);
2170}
2171
86e07d34 2172static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
1da177e4 2173{
86e07d34 2174 struct snd_usb_stream *stream = pcm->private_data;
1da177e4
LT		 2175 if (stream) {
2176 stream->pcm = NULL;
1da177e4
LT		 2177 snd_usb_audio_stream_free(stream);
2178 }
2179}
2180
2181
2182/*
2183 * add this endpoint to the chip instance.
2184 * if a stream with the same endpoint already exists, append to it.
2185 * if not, create a new pcm stream.
2186 */
86e07d34 2187static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
1da177e4
LT		 2188{
2189 struct list_head *p;
86e07d34
TI		 2190 struct snd_usb_stream *as;
2191 struct snd_usb_substream *subs;
2192 struct snd_pcm *pcm;
1da177e4
LT		 2193 int err;
2194
2195 list_for_each(p, &chip->pcm_list) {
86e07d34 2196 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2197 if (as->fmt_type != fp->fmt_type)
2198 continue;
2199 subs = &as->substream[stream];
2200 if (! subs->endpoint)
2201 continue;
2202 if (subs->endpoint == fp->endpoint) {
2203 list_add_tail(&fp->list, &subs->fmt_list);
2204 subs->num_formats++;
2205 subs->formats |= 1ULL << fp->format;
2206 return 0;
2207 }
2208 }
2209 /* look for an empty stream */
2210 list_for_each(p, &chip->pcm_list) {
86e07d34 2211 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2212 if (as->fmt_type != fp->fmt_type)
2213 continue;
2214 subs = &as->substream[stream];
2215 if (subs->endpoint)
2216 continue;
2217 err = snd_pcm_new_stream(as->pcm, stream, 1);
2218 if (err < 0)
2219 return err;
2220 init_substream(as, stream, fp);
2221 return 0;
2222 }
2223
2224 /* create a new pcm */
2225 as = kmalloc(sizeof(*as), GFP_KERNEL);
2226 if (! as)
2227 return -ENOMEM;
2228 memset(as, 0, sizeof(*as));
2229 as->pcm_index = chip->pcm_devs;
2230 as->chip = chip;
2231 as->fmt_type = fp->fmt_type;
2232 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2233 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2234 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2235 &pcm);
2236 if (err < 0) {
2237 kfree(as);
2238 return err;
2239 }
2240 as->pcm = pcm;
2241 pcm->private_data = as;
2242 pcm->private_free = snd_usb_audio_pcm_free;
2243 pcm->info_flags = 0;
2244 if (chip->pcm_devs > 0)
2245 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2246 else
2247 strcpy(pcm->name, "USB Audio");
2248
2249 init_substream(as, stream, fp);
2250
2251 list_add(&as->list, &chip->pcm_list);
2252 chip->pcm_devs++;
2253
2254 proc_pcm_format_add(as);
2255
2256 return 0;
2257}
2258
2259
2260/*
2261 * check if the device uses big-endian samples
2262 */
86e07d34 2263static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1da177e4 2264{
27d10f56
CL		 2265 switch (chip->usb_id) {
2266 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2267 if (fp->endpoint & USB_DIR_IN)
1da177e4 2268 return 1;
27d10f56
CL		 2269 break;
2270 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2271 return 1;
1da177e4
LT		 2272 }
2273 return 0;
2274}
2275
2276/*
2277 * parse the audio format type I descriptor
2278 * and returns the corresponding pcm format
2279 *
2280 * @dev: usb device
2281 * @fp: audioformat record
2282 * @format: the format tag (wFormatTag)
2283 * @fmt: the format type descriptor
2284 */
86e07d34 2285static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2286 int format, unsigned char *fmt)
2287{
2288 int pcm_format;
2289 int sample_width, sample_bytes;
2290
2291 /* FIXME: correct endianess and sign? */
2292 pcm_format = -1;
2293 sample_width = fmt[6];
2294 sample_bytes = fmt[5];
2295 switch (format) {
2296 case 0: /* some devices don't define this correctly... */
2297 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2298 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2299 /* fall-through */
2300 case USB_AUDIO_FORMAT_PCM:
2301 if (sample_width > sample_bytes * 8) {
2302 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2303 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2304 sample_width, sample_bytes);
2305 }
2306 /* check the format byte size */
2307 switch (fmt[5]) {
2308 case 1:
2309 pcm_format = SNDRV_PCM_FORMAT_S8;
2310 break;
2311 case 2:
27d10f56 2312 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2313 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2314 else
2315 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2316 break;
2317 case 3:
27d10f56 2318 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2319 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2320 else
2321 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2322 break;
2323 case 4:
2324 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2325 break;
2326 default:
2327 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2328 chip->dev->devnum, fp->iface,
2329 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2330 break;
2331 }
2332 break;
2333 case USB_AUDIO_FORMAT_PCM8:
2334 /* Dallas DS4201 workaround */
27d10f56 2335 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4
LT		 2336 pcm_format = SNDRV_PCM_FORMAT_S8;
2337 else
2338 pcm_format = SNDRV_PCM_FORMAT_U8;
2339 break;
2340 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2341 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2342 break;
2343 case USB_AUDIO_FORMAT_ALAW:
2344 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2345 break;
2346 case USB_AUDIO_FORMAT_MU_LAW:
2347 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2348 break;
2349 default:
2350 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2351 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2352 break;
2353 }
2354 return pcm_format;
2355}
2356
2357
2358/*
2359 * parse the format descriptor and stores the possible sample rates
2360 * on the audioformat table.
2361 *
2362 * @dev: usb device
2363 * @fp: audioformat record
2364 * @fmt: the format descriptor
2365 * @offset: the start offset of descriptor pointing the rate type
2366 * (7 for type I and II, 8 for type II)
2367 */
86e07d34 2368static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2369 unsigned char *fmt, int offset)
2370{
2371 int nr_rates = fmt[offset];
2372 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2373 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2374 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2375 return -1;
2376 }
2377
2378 if (nr_rates) {
2379 /*
2380 * build the rate table and bitmap flags
2381 */
2382 int r, idx, c;
2383 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2384 static unsigned int conv_rates[] = {
2385 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2386 64000, 88200, 96000, 176400, 192000
2387 };
2388 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2389 if (fp->rate_table == NULL) {
2390 snd_printk(KERN_ERR "cannot malloc\n");
2391 return -1;
2392 }
2393
2394 fp->nr_rates = nr_rates;
2395 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2396 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2397 unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2398 if (rate < fp->rate_min)
2399 fp->rate_min = rate;
2400 else if (rate > fp->rate_max)
2401 fp->rate_max = rate;
2402 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2403 if (rate == conv_rates[c]) {
2404 fp->rates |= (1 << c);
2405 break;
2406 }
2407 }
2408 }
2409 } else {
2410 /* continuous rates */
2411 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2412 fp->rate_min = combine_triple(&fmt[offset + 1]);
2413 fp->rate_max = combine_triple(&fmt[offset + 4]);
2414 }
2415 return 0;
2416}
2417
2418/*
2419 * parse the format type I and III descriptors
2420 */
86e07d34 2421static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2422 int format, unsigned char *fmt)
2423{
2424 int pcm_format;
2425
2426 if (fmt[3] == USB_FORMAT_TYPE_III) {
2427 /* FIXME: the format type is really IECxxx
2428 * but we give normal PCM format to get the existing
2429 * apps working...
2430 */
2431 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2432 } else {
27d10f56 2433 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2434 if (pcm_format < 0)
2435 return -1;
2436 }
2437 fp->format = pcm_format;
2438 fp->channels = fmt[4];
2439 if (fp->channels < 1) {
2440 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2441 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2442 return -1;
2443 }
27d10f56 2444 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2445}
2446
2447/*
2448 * prase the format type II descriptor
2449 */
86e07d34 2450static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2451 int format, unsigned char *fmt)
2452{
2453 int brate, framesize;
2454 switch (format) {
2455 case USB_AUDIO_FORMAT_AC3:
2456 /* FIXME: there is no AC3 format defined yet */
2457 // fp->format = SNDRV_PCM_FORMAT_AC3;
2458 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2459 break;
2460 case USB_AUDIO_FORMAT_MPEG:
2461 fp->format = SNDRV_PCM_FORMAT_MPEG;
2462 break;
2463 default:
2464 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
27d10f56 2465 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2466 fp->format = SNDRV_PCM_FORMAT_MPEG;
2467 break;
2468 }
2469 fp->channels = 1;
2470 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2471 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2472 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2473 fp->frame_size = framesize;
27d10f56 2474 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2475}
2476
86e07d34 2477static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2478 int format, unsigned char *fmt, int stream)
2479{
2480 int err;
2481
2482 switch (fmt[3]) {
2483 case USB_FORMAT_TYPE_I:
2484 case USB_FORMAT_TYPE_III:
27d10f56 2485 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2486 break;
2487 case USB_FORMAT_TYPE_II:
27d10f56 2488 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2489 break;
2490 default:
2491 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2492 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2493 return -1;
2494 }
2495 fp->fmt_type = fmt[3];
2496 if (err < 0)
2497 return err;
2498#if 1
33159378 2499 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
1da177e4
LT		 2500 /* extigy apparently supports sample rates other than 48k
2501 * but not in ordinary way. so we enable only 48k atm.
2502 */
27d10f56 2503 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
33159378
CL		 2504 chip->usb_id == USB_ID(0x041e, 0x3020) ||
2505 chip->usb_id == USB_ID(0x041e, 0x3061)) {
1da177e4 2506 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2507 fp->rates != SNDRV_PCM_RATE_48000 &&
2508 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2509 return -1;
1da177e4
LT		 2510 }
2511#endif
2512 return 0;
2513}
2514
86e07d34 2515static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
1da177e4
LT		 2516{
2517 struct usb_device *dev;
2518 struct usb_interface *iface;
2519 struct usb_host_interface *alts;
2520 struct usb_interface_descriptor *altsd;
2521 int i, altno, err, stream;
2522 int format;
2523 struct audioformat *fp;
2524 unsigned char *fmt, *csep;
2525
2526 dev = chip->dev;
2527
2528 /* parse the interface's altsettings */
2529 iface = usb_ifnum_to_if(dev, iface_no);
2530 for (i = 0; i < iface->num_altsetting; i++) {
2531 alts = &iface->altsetting[i];
2532 altsd = get_iface_desc(alts);
2533 /* skip invalid one */
2534 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2535 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2536 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2537 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2538 altsd->bNumEndpoints < 1 ||
2539 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2540 continue;
2541 /* must be isochronous */
2542 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2543 USB_ENDPOINT_XFER_ISOC)
2544 continue;
2545 /* check direction */
2546 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2547 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2548 altno = altsd->bAlternateSetting;
2549
2550 /* get audio formats */
2551 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2552 if (!fmt) {
2553 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2554 dev->devnum, iface_no, altno);
2555 continue;
2556 }
2557
2558 if (fmt[0] < 7) {
2559 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2560 dev->devnum, iface_no, altno);
2561 continue;
2562 }
2563
2564 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2565
2566 /* get format type */
2567 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2568 if (!fmt) {
2569 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2570 dev->devnum, iface_no, altno);
2571 continue;
2572 }
2573 if (fmt[0] < 8) {
2574 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2575 dev->devnum, iface_no, altno);
2576 continue;
2577 }
2578
2579 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2580 /* Creamware Noah has this descriptor after the 2nd endpoint */
2581 if (!csep && altsd->bNumEndpoints >= 2)
2582 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2583 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2584 snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2585 dev->devnum, iface_no, altno);
2586 continue;
2587 }
2588
2589 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2590 if (! fp) {
2591 snd_printk(KERN_ERR "cannot malloc\n");
2592 return -ENOMEM;
2593 }
2594
2595 memset(fp, 0, sizeof(*fp));
2596 fp->iface = iface_no;
2597 fp->altsetting = altno;
2598 fp->altset_idx = i;
2599 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2600 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
1da177e4 2601 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2602 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2603 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2604 * (fp->maxpacksize & 0x7ff);
1da177e4
LT		 2605 fp->attributes = csep[3];
2606
2607 /* some quirks for attributes here */
2608
c3f93297
CL		 2609 switch (chip->usb_id) {
2610 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2611 /* Optoplay sets the sample rate attribute although
2612 * it seems not supporting it in fact.
2613 */
2614 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2615 break;
2616 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2617 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2618 /* doesn't set the sample rate attribute, but supports it */
2619 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2620 break;
2621 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2622 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2623 an older model 77d:223) */
1da177e4
LT		 2624 /*
2625 * plantronics headset and Griffin iMic have set adaptive-in
2626 * although it's really not...
2627 */
1da177e4
LT		 2628 fp->ep_attr &= ~EP_ATTR_MASK;
2629 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2630 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2631 else
2632 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2633 break;
1da177e4
LT		 2634 }
2635
2636 /* ok, let's parse further... */
27d10f56 2637 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2638 kfree(fp->rate_table);
2639 kfree(fp);
2640 continue;
2641 }
2642
2643 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2644 err = add_audio_endpoint(chip, stream, fp);
2645 if (err < 0) {
2646 kfree(fp->rate_table);
2647 kfree(fp);
2648 return err;
2649 }
2650 /* try to set the interface... */
2651 usb_set_interface(chip->dev, iface_no, altno);
2652 init_usb_pitch(chip->dev, iface_no, alts, fp);
2653 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2654 }
2655 return 0;
2656}
2657
2658
2659/*
2660 * disconnect streams
2661 * called from snd_usb_audio_disconnect()
2662 */
ee733397 2663static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2664{
2665 int idx;
86e07d34
TI		 2666 struct snd_usb_stream *as;
2667 struct snd_usb_substream *subs;
1da177e4 2668
86e07d34 2669 as = list_entry(head, struct snd_usb_stream, list);
1da177e4
LT		 2670 for (idx = 0; idx < 2; idx++) {
2671 subs = &as->substream[idx];
2672 if (!subs->num_formats)
2673 return;
2674 release_substream_urbs(subs, 1);
2675 subs->interface = -1;
2676 }
2677}
2678
2679/*
2680 * parse audio control descriptor and create pcm/midi streams
2681 */
86e07d34 2682static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
1da177e4
LT		 2683{
2684 struct usb_device *dev = chip->dev;
2685 struct usb_host_interface *host_iface;
2686 struct usb_interface *iface;
2687 unsigned char *p1;
2688 int i, j;
2689
2690 /* find audiocontrol interface */
2691 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2692 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2693 snd_printk(KERN_ERR "cannot find HEADER\n");
2694 return -EINVAL;
2695 }
2696 if (! p1[7] || p1[0] < 8 + p1[7]) {
2697 snd_printk(KERN_ERR "invalid HEADER\n");
2698 return -EINVAL;
2699 }
2700
2701 /*
2702 * parse all USB audio streaming interfaces
2703 */
2704 for (i = 0; i < p1[7]; i++) {
2705 struct usb_host_interface *alts;
2706 struct usb_interface_descriptor *altsd;
2707 j = p1[8 + i];
2708 iface = usb_ifnum_to_if(dev, j);
2709 if (!iface) {
2710 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2711 dev->devnum, ctrlif, j);
2712 continue;
2713 }
2714 if (usb_interface_claimed(iface)) {
2715 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2716 continue;
2717 }
2718 alts = &iface->altsetting[0];
2719 altsd = get_iface_desc(alts);
2720 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2721 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2722 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2723 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2724 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2725 continue;
2726 }
2727 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2728 continue;
2729 }
2730 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2731 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2732 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2733 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2734 /* skip non-supported classes */
2735 continue;
2736 }
2737 if (! parse_audio_endpoints(chip, j)) {
2738 usb_set_interface(dev, j, 0); /* reset the current interface */
2739 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2740 }
2741 }
2742
2743 return 0;
2744}
2745
2746/*
2747 * create a stream for an endpoint/altsetting without proper descriptors
2748 */
86e07d34 2749static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
1da177e4 2750 struct usb_interface *iface,
86e07d34 2751 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2752{
2753 struct audioformat *fp;
2754 struct usb_host_interface *alts;
2755 int stream, err;
2756 int *rate_table = NULL;
2757
2758 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2759 if (! fp) {
2760 snd_printk(KERN_ERR "cannot malloc\n");
2761 return -ENOMEM;
2762 }
2763 memcpy(fp, quirk->data, sizeof(*fp));
2764 if (fp->nr_rates > 0) {
2765 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2766 if (!rate_table) {
2767 kfree(fp);
2768 return -ENOMEM;
2769 }
2770 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2771 fp->rate_table = rate_table;
2772 }
2773
2774 stream = (fp->endpoint & USB_DIR_IN)
2775 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2776 err = add_audio_endpoint(chip, stream, fp);
2777 if (err < 0) {
2778 kfree(fp);
2779 kfree(rate_table);
2780 return err;
2781 }
2782 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2783 fp->altset_idx >= iface->num_altsetting) {
2784 kfree(fp);
2785 kfree(rate_table);
2786 return -EINVAL;
2787 }
2788 alts = &iface->altsetting[fp->altset_idx];
2789 usb_set_interface(chip->dev, fp->iface, 0);
2790 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2791 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2792 return 0;
2793}
2794
2795/*
2796 * create a stream for an interface with proper descriptors
2797 */
86e07d34 2798static int create_standard_audio_quirk(struct snd_usb_audio *chip,
d1bda045 2799 struct usb_interface *iface,
86e07d34 2800 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2801{
2802 struct usb_host_interface *alts;
2803 struct usb_interface_descriptor *altsd;
2804 int err;
2805
2806 alts = &iface->altsetting[0];
2807 altsd = get_iface_desc(alts);
d1bda045 2808 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
1da177e4
LT		 2809 if (err < 0) {
2810 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2811 altsd->bInterfaceNumber, err);
2812 return err;
2813 }
d1bda045
CL		 2814 /* reset the current interface */
2815 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
1da177e4
LT		 2816 return 0;
2817}
2818
2819/*
2820 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2821 * to detect the sample rate is by looking at wMaxPacketSize.
2822 */
86e07d34 2823static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
854af957 2824 struct usb_interface *iface,
86e07d34 2825 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2826{
2827 static const struct audioformat ua_format = {
2828 .format = SNDRV_PCM_FORMAT_S24_3LE,
2829 .channels = 2,
2830 .fmt_type = USB_FORMAT_TYPE_I,
2831 .altsetting = 1,
2832 .altset_idx = 1,
2833 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2834 };
2835 struct usb_host_interface *alts;
2836 struct usb_interface_descriptor *altsd;
2837 struct audioformat *fp;
2838 int stream, err;
2839
2840 /* both PCM and MIDI interfaces have 2 altsettings */
2841 if (iface->num_altsetting != 2)
2842 return -ENXIO;
2843 alts = &iface->altsetting[1];
2844 altsd = get_iface_desc(alts);
2845
2846 if (altsd->bNumEndpoints == 2) {
86e07d34 2847 static const struct snd_usb_midi_endpoint_info ua700_ep = {
1da177e4
LT		 2848 .out_cables = 0x0003,
2849 .in_cables = 0x0003
2850 };
86e07d34 2851 static const struct snd_usb_audio_quirk ua700_quirk = {
1da177e4
LT		 2852 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2853 .data = &ua700_ep
2854 };
86e07d34 2855 static const struct snd_usb_midi_endpoint_info ua25_ep = {
1da177e4
LT		 2856 .out_cables = 0x0001,
2857 .in_cables = 0x0001
2858 };
86e07d34 2859 static const struct snd_usb_audio_quirk ua25_quirk = {
1da177e4
LT		 2860 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2861 .data = &ua25_ep
2862 };
27d10f56 2863 if (chip->usb_id == USB_ID(0x0582, 0x002b))
1da177e4
LT		 2864 return snd_usb_create_midi_interface(chip, iface,
2865 &ua700_quirk);
2866 else
2867 return snd_usb_create_midi_interface(chip, iface,
2868 &ua25_quirk);
2869 }
2870
2871 if (altsd->bNumEndpoints != 1)
2872 return -ENXIO;
2873
2874 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2875 if (!fp)
2876 return -ENOMEM;
2877 memcpy(fp, &ua_format, sizeof(*fp));
2878
2879 fp->iface = altsd->bInterfaceNumber;
2880 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2881 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2882 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2883
2884 switch (fp->maxpacksize) {
2885 case 0x120:
2886 fp->rate_max = fp->rate_min = 44100;
2887 break;
2888 case 0x138:
2889 case 0x140:
2890 fp->rate_max = fp->rate_min = 48000;
2891 break;
2892 case 0x258:
2893 case 0x260:
2894 fp->rate_max = fp->rate_min = 96000;
2895 break;
2896 default:
2897 snd_printk(KERN_ERR "unknown sample rate\n");
2898 kfree(fp);
2899 return -ENXIO;
2900 }
2901
2902 stream = (fp->endpoint & USB_DIR_IN)
2903 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2904 err = add_audio_endpoint(chip, stream, fp);
2905 if (err < 0) {
2906 kfree(fp);
2907 return err;
2908 }
2909 usb_set_interface(chip->dev, fp->iface, 0);
2910 return 0;
2911}
2912
2913/*
2914 * Create a stream for an Edirol UA-1000 interface.
2915 */
86e07d34 2916static int create_ua1000_quirk(struct snd_usb_audio *chip,
854af957 2917 struct usb_interface *iface,
86e07d34 2918 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2919{
2920 static const struct audioformat ua1000_format = {
2921 .format = SNDRV_PCM_FORMAT_S32_LE,
2922 .fmt_type = USB_FORMAT_TYPE_I,
2923 .altsetting = 1,
2924 .altset_idx = 1,
2925 .attributes = 0,
2926 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2927 };
2928 struct usb_host_interface *alts;
2929 struct usb_interface_descriptor *altsd;
2930 struct audioformat *fp;
2931 int stream, err;
2932
2933 if (iface->num_altsetting != 2)
2934 return -ENXIO;
2935 alts = &iface->altsetting[1];
2936 altsd = get_iface_desc(alts);
2937 if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2938 altsd->bNumEndpoints != 1)
2939 return -ENXIO;
2940
2941 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2942 if (!fp)
2943 return -ENOMEM;
2944 memcpy(fp, &ua1000_format, sizeof(*fp));
2945
2946 fp->channels = alts->extra[4];
2947 fp->iface = altsd->bInterfaceNumber;
2948 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2949 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2950 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2951 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2952
2953 stream = (fp->endpoint & USB_DIR_IN)
2954 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2955 err = add_audio_endpoint(chip, stream, fp);
2956 if (err < 0) {
2957 kfree(fp);
2958 return err;
2959 }
2960 /* FIXME: playback must be synchronized to capture */
2961 usb_set_interface(chip->dev, fp->iface, 0);
2962 return 0;
2963}
2964
86e07d34 2965static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 2966 struct usb_interface *iface,
86e07d34 2967 const struct snd_usb_audio_quirk *quirk);
1da177e4
LT		 2968
2969/*
2970 * handle the quirks for the contained interfaces
2971 */
86e07d34 2972static int create_composite_quirk(struct snd_usb_audio *chip,
1da177e4 2973 struct usb_interface *iface,
86e07d34 2974 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2975{
2976 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2977 int err;
2978
2979 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2980 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2981 if (!iface)
2982 continue;
2983 if (quirk->ifnum != probed_ifnum &&
2984 usb_interface_claimed(iface))
2985 continue;
2986 err = snd_usb_create_quirk(chip, iface, quirk);
2987 if (err < 0)
2988 return err;
2989 if (quirk->ifnum != probed_ifnum)
2990 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2991 }
2992 return 0;
2993}
2994
86e07d34 2995static int ignore_interface_quirk(struct snd_usb_audio *chip,
854af957 2996 struct usb_interface *iface,
86e07d34 2997 const struct snd_usb_audio_quirk *quirk)
854af957
CL		 2998{
2999 return 0;
3000}
3001
1da177e4
LT		 3002
3003/*
3004 * boot quirks
3005 */
3006
3007#define EXTIGY_FIRMWARE_SIZE_OLD 794
3008#define EXTIGY_FIRMWARE_SIZE_NEW 483
3009
3010static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
3011{
3012 struct usb_host_config *config = dev->actconfig;
3013 int err;
3014
3015 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
3016 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
3017 snd_printdd("sending Extigy boot sequence...\n");
3018 /* Send message to force it to reconnect with full interface. */
3019 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3020 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3021 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3022 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3023 &dev->descriptor, sizeof(dev->descriptor));
3024 config = dev->actconfig;
3025 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3026 err = usb_reset_configuration(dev);
3027 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3028 snd_printdd("extigy_boot: new boot length = %d\n",
3029 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3030 return -ENODEV; /* quit this anyway */
3031 }
3032 return 0;
3033}
3034
3a2f0856
CL		 3035static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3036{
3a2f0856
CL		 3037 u8 buf = 1;
3038
3039 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3040 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3041 0, 0, &buf, 1, 1000);
3042 if (buf == 0) {
3043 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3044 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3045 1, 2000, NULL, 0, 1000);
3046 return -ENODEV;
3047 }
3a2f0856
CL		 3048 return 0;
3049}
3050
1da177e4
LT		 3051
3052/*
3053 * audio-interface quirks
3054 *
3055 * returns zero if no standard audio/MIDI parsing is needed.
3056 * returns a postive value if standard audio/midi interfaces are parsed
3057 * after this.
3058 * returns a negative value at error.
3059 */
86e07d34 3060static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3061 struct usb_interface *iface,
86e07d34 3062 const struct snd_usb_audio_quirk *quirk)
1da177e4 3063{
86e07d34
TI		 3064 typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
3065 const struct snd_usb_audio_quirk *);
854af957
CL		 3066 static const quirk_func_t quirk_funcs[] = {
3067 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3068 [QUIRK_COMPOSITE] = create_composite_quirk,
3069 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3070 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3071 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3072 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3073 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3074 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3075 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3076 [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface,
d1bda045 3077 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
854af957
CL		 3078 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3079 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3080 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3081 };
3082
3083 if (quirk->type < QUIRK_TYPE_COUNT) {
3084 return quirk_funcs[quirk->type](chip, iface, quirk);
3085 } else {
1da177e4
LT		 3086 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3087 return -ENXIO;
3088 }
3089}
3090
3091
3092/*
3093 * common proc files to show the usb device info
3094 */
86e07d34 3095static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3096{
86e07d34 3097 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3098 if (! chip->shutdown)
3099 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3100}
3101
86e07d34 3102static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3103{
86e07d34 3104 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3105 if (! chip->shutdown)
3106 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3107 USB_ID_VENDOR(chip->usb_id),
3108 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3109}
3110
86e07d34 3111static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
1da177e4 3112{
86e07d34 3113 struct snd_info_entry *entry;
1da177e4
LT		 3114 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3115 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3116 if (! snd_card_proc_new(chip->card, "usbid", &entry))
3117 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3118}
3119
3120/*
3121 * free the chip instance
3122 *
3123 * here we have to do not much, since pcm and controls are already freed
3124 *
3125 */
3126
86e07d34 3127static int snd_usb_audio_free(struct snd_usb_audio *chip)
1da177e4
LT		 3128{
3129 kfree(chip);
3130 return 0;
3131}
3132
86e07d34 3133static int snd_usb_audio_dev_free(struct snd_device *device)
1da177e4 3134{
86e07d34 3135 struct snd_usb_audio *chip = device->device_data;
1da177e4
LT		 3136 return snd_usb_audio_free(chip);
3137}
3138
3139
3140/*
3141 * create a chip instance and set its names.
3142 */
3143static int snd_usb_audio_create(struct usb_device *dev, int idx,
86e07d34
TI		 3144 const struct snd_usb_audio_quirk *quirk,
3145 struct snd_usb_audio **rchip)
1da177e4 3146{
86e07d34
TI		 3147 struct snd_card *card;
3148 struct snd_usb_audio *chip;
1da177e4
LT		 3149 int err, len;
3150 char component[14];
86e07d34 3151 static struct snd_device_ops ops = {
1da177e4
LT		 3152 .dev_free = snd_usb_audio_dev_free,
3153 };
3154
3155 *rchip = NULL;
3156
3157 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3158 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3159 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3160 return -ENXIO;
3161 }
3162
3163 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3164 if (card == NULL) {
3165 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3166 return -ENOMEM;
3167 }
3168
561b220a 3169 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4
LT		 3170 if (! chip) {
3171 snd_card_free(card);
3172 return -ENOMEM;
3173 }
3174
3175 chip->index = idx;
3176 chip->dev = dev;
3177 chip->card = card;
27d10f56
CL		 3178 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3179 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3180 INIT_LIST_HEAD(&chip->pcm_list);
3181 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3182 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3183
3184 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3185 snd_usb_audio_free(chip);
3186 snd_card_free(card);
3187 return err;
3188 }
3189
3190 strcpy(card->driver, "USB-Audio");
3191 sprintf(component, "USB%04x:%04x",
27d10f56 3192 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3193 snd_component_add(card, component);
3194
3195 /* retrieve the device string as shortname */
3196 if (quirk && quirk->product_name) {
3197 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3198 } else {
3199 if (!dev->descriptor.iProduct ||
3200 usb_string(dev, dev->descriptor.iProduct,
3201 card->shortname, sizeof(card->shortname)) <= 0) {
3202 /* no name available from anywhere, so use ID */
3203 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3204 USB_ID_VENDOR(chip->usb_id),
3205 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3206 }
3207 }
3208
3209 /* retrieve the vendor and device strings as longname */
3210 if (quirk && quirk->vendor_name) {
3211 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3212 } else {
3213 if (dev->descriptor.iManufacturer)
3214 len = usb_string(dev, dev->descriptor.iManufacturer,
3215 card->longname, sizeof(card->longname));
3216 else
3217 len = 0;
3218 /* we don't really care if there isn't any vendor string */
3219 }
3220 if (len > 0)
3221 strlcat(card->longname, " ", sizeof(card->longname));
3222
3223 strlcat(card->longname, card->shortname, sizeof(card->longname));
3224
3225 len = strlcat(card->longname, " at ", sizeof(card->longname));
3226
3227 if (len < sizeof(card->longname))
3228 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3229
3230 strlcat(card->longname,
3231 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3232 sizeof(card->longname));
3233
3234 snd_usb_audio_create_proc(chip);
3235
1da177e4
LT		 3236 *rchip = chip;
3237 return 0;
3238}
3239
3240
3241/*
3242 * probe the active usb device
3243 *
3244 * note that this can be called multiple times per a device, when it
3245 * includes multiple audio control interfaces.
3246 *
3247 * thus we check the usb device pointer and creates the card instance
3248 * only at the first time. the successive calls of this function will
3249 * append the pcm interface to the corresponding card.
3250 */
3251static void *snd_usb_audio_probe(struct usb_device *dev,
3252 struct usb_interface *intf,
3253 const struct usb_device_id *usb_id)
3254{
86e07d34 3255 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
1da177e4 3256 int i, err;
86e07d34 3257 struct snd_usb_audio *chip;
1da177e4
LT		 3258 struct usb_host_interface *alts;
3259 int ifnum;
27d10f56 3260 u32 id;
1da177e4
LT		 3261
3262 alts = &intf->altsetting[0];
3263 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3264 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3265 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3266
3267 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3268 goto __err_val;
3269
3270 /* SB Extigy needs special boot-up sequence */
3271 /* if more models come, this will go to the quirk list. */
27d10f56 3272 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3273 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3274 goto __err_val;
1da177e4 3275 }
3a2f0856
CL		 3276 /* SB Audigy 2 NX needs its own boot-up magic, too */
3277 if (id == USB_ID(0x041e, 0x3020)) {
3278 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3279 goto __err_val;
3280 }
1da177e4
LT		 3281
3282 /*
3283 * found a config. now register to ALSA
3284 */
3285
3286 /* check whether it's already registered */
3287 chip = NULL;
3288 down(&register_mutex);
3289 for (i = 0; i < SNDRV_CARDS; i++) {
3290 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3291 if (usb_chip[i]->shutdown) {
3292 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3293 goto __error;
3294 }
3295 chip = usb_chip[i];
3296 break;
3297 }
3298 }
3299 if (! chip) {
3300 /* it's a fresh one.
3301 * now look for an empty slot and create a new card instance
3302 */
1da177e4
LT		 3303 for (i = 0; i < SNDRV_CARDS; i++)
3304 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3305 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3306 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3307 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3308 goto __error;
3309 }
1dcd3ec4 3310 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3311 break;
3312 }
3313 if (! chip) {
3314 snd_printk(KERN_ERR "no available usb audio device\n");
3315 goto __error;
3316 }
3317 }
3318
3319 err = 1; /* continue */
3320 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3321 /* need some special handlings */
3322 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3323 goto __error;
3324 }
3325
3326 if (err > 0) {
3327 /* create normal USB audio interfaces */
3328 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3329 snd_usb_create_mixer(chip, ifnum) < 0) {
3330 goto __error;
3331 }
3332 }
3333
3334 /* we are allowed to call snd_card_register() many times */
3335 if (snd_card_register(chip->card) < 0) {
3336 goto __error;
3337 }
3338
3339 usb_chip[chip->index] = chip;
3340 chip->num_interfaces++;
3341 up(&register_mutex);
3342 return chip;
3343
3344 __error:
3345 if (chip && !chip->num_interfaces)
3346 snd_card_free(chip->card);
3347 up(&register_mutex);
3348 __err_val:
3349 return NULL;
3350}
3351
3352/*
3353 * we need to take care of counter, since disconnection can be called also
3354 * many times as well as usb_audio_probe().
3355 */
3356static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3357{
86e07d34
TI		 3358 struct snd_usb_audio *chip;
3359 struct snd_card *card;
1da177e4
LT		 3360 struct list_head *p;
3361
3362 if (ptr == (void *)-1L)
3363 return;
3364
3365 chip = ptr;
3366 card = chip->card;
3367 down(&register_mutex);
3368 chip->shutdown = 1;
3369 chip->num_interfaces--;
3370 if (chip->num_interfaces <= 0) {
3371 snd_card_disconnect(card);
3372 /* release the pcm resources */
3373 list_for_each(p, &chip->pcm_list) {
ee733397 3374 snd_usb_stream_disconnect(p);
1da177e4
LT		 3375 }
3376 /* release the midi resources */
3377 list_for_each(p, &chip->midi_list) {
ee733397 3378 snd_usbmidi_disconnect(p);
1da177e4 3379 }
84957a8a
CL		 3380 /* release mixer resources */
3381 list_for_each(p, &chip->mixer_list) {
3382 snd_usb_mixer_disconnect(p);
3383 }
1da177e4
LT		 3384 usb_chip[chip->index] = NULL;
3385 up(&register_mutex);
230cd5e2 3386 snd_card_free(card);
1da177e4
LT		 3387 } else {
3388 up(&register_mutex);
3389 }
3390}
3391
3392/*
3393 * new 2.5 USB kernel API
3394 */
3395static int usb_audio_probe(struct usb_interface *intf,
3396 const struct usb_device_id *id)
3397{
3398 void *chip;
3399 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3400 if (chip) {
3401 dev_set_drvdata(&intf->dev, chip);
3402 return 0;
3403 } else
3404 return -EIO;
3405}
3406
3407static void usb_audio_disconnect(struct usb_interface *intf)
3408{
3409 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3410 dev_get_drvdata(&intf->dev));
3411}
3412
3413
3414static int __init snd_usb_audio_init(void)
3415{
3416 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3417 printk(KERN_WARNING "invalid nrpacks value.\n");
3418 return -EINVAL;
3419 }
3420 usb_register(&usb_audio_driver);
3421 return 0;
3422}
3423
3424
3425static void __exit snd_usb_audio_cleanup(void)
3426{
3427 usb_deregister(&usb_audio_driver);
3428}
3429
3430module_init(snd_usb_audio_init);
3431module_exit(snd_usb_audio_cleanup);
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