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[ALSA] Remove xxx_t typedefs: USB-Audio
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / usb / usbaudio.c
CommitLineData
1da177e4
LT		 1/*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Main and PCM part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 *
28 * NOTES:
29 *
30 * - async unlink should be used for avoiding the sleep inside lock.
31 * 2.4.22 usb-uhci seems buggy for async unlinking and results in
32 * oops. in such a cse, pass async_unlink=0 option.
33 * - the linked URBs would be preferred but not used so far because of
34 * the instability of unlinking.
35 * - type II is not supported properly. there is no device which supports
36 * this type *correctly*. SB extigy looks as if it supports, but it's
37 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
38 */
39
40
41#include <sound/driver.h>
42#include <linux/bitops.h>
43#include <linux/init.h>
44#include <linux/list.h>
45#include <linux/slab.h>
46#include <linux/string.h>
47#include <linux/usb.h>
6207e51b 48#include <linux/vmalloc.h>
1da177e4
LT		 49#include <linux/moduleparam.h>
50#include <sound/core.h>
51#include <sound/info.h>
52#include <sound/pcm.h>
53#include <sound/pcm_params.h>
54#include <sound/initval.h>
55
56#include "usbaudio.h"
57
58
59MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
60MODULE_DESCRIPTION("USB Audio");
61MODULE_LICENSE("GPL");
62MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
63
64
65static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
66static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
67static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
68static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
69static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
70static int nrpacks = 4; /* max. number of packets per urb */
71static int async_unlink = 1;
72
73module_param_array(index, int, NULL, 0444);
74MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
75module_param_array(id, charp, NULL, 0444);
76MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
77module_param_array(enable, bool, NULL, 0444);
78MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
79module_param_array(vid, int, NULL, 0444);
80MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
81module_param_array(pid, int, NULL, 0444);
82MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
71d848ca 83module_param(nrpacks, int, 0644);
1da177e4
LT		 84MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
85module_param(async_unlink, bool, 0444);
86MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
87
88
89/*
90 * debug the h/w constraints
91 */
92/* #define HW_CONST_DEBUG */
93
94
95/*
96 *
97 */
98
99#define MAX_PACKS 10
100#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
15a24c07 101#define MAX_URBS 8
604cf499 102#define SYNC_URBS 4 /* always four urbs for sync */
1da177e4
LT		 103#define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
104
1da177e4
LT		 105struct audioformat {
106 struct list_head list;
107 snd_pcm_format_t format; /* format type */
108 unsigned int channels; /* # channels */
109 unsigned int fmt_type; /* USB audio format type (1-3) */
110 unsigned int frame_size; /* samples per frame for non-audio */
111 int iface; /* interface number */
112 unsigned char altsetting; /* corresponding alternate setting */
113 unsigned char altset_idx; /* array index of altenate setting */
114 unsigned char attributes; /* corresponding attributes of cs endpoint */
115 unsigned char endpoint; /* endpoint */
116 unsigned char ep_attr; /* endpoint attributes */
117 unsigned int maxpacksize; /* max. packet size */
118 unsigned int rates; /* rate bitmasks */
119 unsigned int rate_min, rate_max; /* min/max rates */
120 unsigned int nr_rates; /* number of rate table entries */
121 unsigned int *rate_table; /* rate table */
122};
123
86e07d34
TI		 124struct snd_usb_substream;
125
1da177e4
LT		 126struct snd_urb_ctx {
127 struct urb *urb;
55851f73 128 unsigned int buffer_size; /* size of data buffer, if data URB */
86e07d34 129 struct snd_usb_substream *subs;
1da177e4
LT		 130 int index; /* index for urb array */
131 int packets; /* number of packets per urb */
1da177e4
LT		 132};
133
134struct snd_urb_ops {
86e07d34
TI		 135 int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
136 int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
137 int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
138 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
1da177e4
LT		 139};
140
141struct snd_usb_substream {
86e07d34 142 struct snd_usb_stream *stream;
1da177e4 143 struct usb_device *dev;
86e07d34 144 struct snd_pcm_substream *pcm_substream;
1da177e4
LT		 145 int direction; /* playback or capture */
146 int interface; /* current interface */
147 int endpoint; /* assigned endpoint */
148 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
149 unsigned int cur_rate; /* current rate (for hw_params callback) */
150 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
151 unsigned int format; /* USB data format */
152 unsigned int datapipe; /* the data i/o pipe */
153 unsigned int syncpipe; /* 1 - async out or adaptive in */
573567e0 154 unsigned int datainterval; /* log_2 of data packet interval */
1da177e4
LT		 155 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
156 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
157 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
158 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
159 unsigned int phase; /* phase accumulator */
160 unsigned int maxpacksize; /* max packet size in bytes */
161 unsigned int maxframesize; /* max packet size in frames */
162 unsigned int curpacksize; /* current packet size in bytes (for capture) */
163 unsigned int curframesize; /* current packet size in frames (for capture) */
164 unsigned int fill_max: 1; /* fill max packet size always */
165 unsigned int fmt_type; /* USB audio format type (1-3) */
9624ea81 166 unsigned int packs_per_ms; /* packets per millisecond (for playback) */
1da177e4
LT		 167
168 unsigned int running: 1; /* running status */
169
1da177e4 170 unsigned int hwptr_done; /* processed frame position in the buffer */
1da177e4
LT		 171 unsigned int transfer_done; /* processed frames since last period update */
172 unsigned long active_mask; /* bitmask of active urbs */
173 unsigned long unlink_mask; /* bitmask of unlinked urbs */
174
175 unsigned int nurbs; /* # urbs */
86e07d34
TI		 176 struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
177 struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
55851f73
CL		 178 char *syncbuf; /* sync buffer for all sync URBs */
179 dma_addr_t sync_dma; /* DMA address of syncbuf */
1da177e4
LT		 180
181 u64 formats; /* format bitmasks (all or'ed) */
182 unsigned int num_formats; /* number of supported audio formats (list) */
183 struct list_head fmt_list; /* format list */
184 spinlock_t lock;
185
186 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
187};
188
189
190struct snd_usb_stream {
86e07d34
TI		 191 struct snd_usb_audio *chip;
192 struct snd_pcm *pcm;
1da177e4
LT		 193 int pcm_index;
194 unsigned int fmt_type; /* USB audio format type (1-3) */
86e07d34 195 struct snd_usb_substream substream[2];
1da177e4
LT		 196 struct list_head list;
197};
198
199
200/*
201 * we keep the snd_usb_audio_t instances by ourselves for merging
202 * the all interfaces on the same card as one sound device.
203 */
204
205static DECLARE_MUTEX(register_mutex);
86e07d34 206static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
1da177e4
LT		 207
208
209/*
210 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
211 * this will overflow at approx 524 kHz
212 */
77933d72 213static inline unsigned get_usb_full_speed_rate(unsigned int rate)
1da177e4
LT		 214{
215 return ((rate << 13) + 62) / 125;
216}
217
218/*
219 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
220 * this will overflow at approx 4 MHz
221 */
77933d72 222static inline unsigned get_usb_high_speed_rate(unsigned int rate)
1da177e4
LT		 223{
224 return ((rate << 10) + 62) / 125;
225}
226
227/* convert our full speed USB rate into sampling rate in Hz */
77933d72 228static inline unsigned get_full_speed_hz(unsigned int usb_rate)
1da177e4
LT		 229{
230 return (usb_rate * 125 + (1 << 12)) >> 13;
231}
232
233/* convert our high speed USB rate into sampling rate in Hz */
77933d72 234static inline unsigned get_high_speed_hz(unsigned int usb_rate)
1da177e4
LT		 235{
236 return (usb_rate * 125 + (1 << 9)) >> 10;
237}
238
239
240/*
241 * prepare urb for full speed capture sync pipe
242 *
243 * fill the length and offset of each urb descriptor.
244 * the fixed 10.14 frequency is passed through the pipe.
245 */
86e07d34
TI		 246static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
247 struct snd_pcm_runtime *runtime,
1da177e4
LT		 248 struct urb *urb)
249{
250 unsigned char *cp = urb->transfer_buffer;
86e07d34 251 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 252
1da177e4 253 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 254 urb->iso_frame_desc[0].length = 3;
255 urb->iso_frame_desc[0].offset = 0;
256 cp[0] = subs->freqn >> 2;
257 cp[1] = subs->freqn >> 10;
258 cp[2] = subs->freqn >> 18;
1da177e4
LT		 259 return 0;
260}
261
262/*
263 * prepare urb for high speed capture sync pipe
264 *
265 * fill the length and offset of each urb descriptor.
266 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
267 */
86e07d34
TI		 268static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
269 struct snd_pcm_runtime *runtime,
1da177e4
LT		 270 struct urb *urb)
271{
272 unsigned char *cp = urb->transfer_buffer;
86e07d34 273 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 274
1da177e4 275 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 276 urb->iso_frame_desc[0].length = 4;
277 urb->iso_frame_desc[0].offset = 0;
278 cp[0] = subs->freqn;
279 cp[1] = subs->freqn >> 8;
280 cp[2] = subs->freqn >> 16;
281 cp[3] = subs->freqn >> 24;
1da177e4
LT		 282 return 0;
283}
284
285/*
286 * process after capture sync complete
287 * - nothing to do
288 */
86e07d34
TI		 289static int retire_capture_sync_urb(struct snd_usb_substream *subs,
290 struct snd_pcm_runtime *runtime,
1da177e4
LT		 291 struct urb *urb)
292{
293 return 0;
294}
295
296/*
297 * prepare urb for capture data pipe
298 *
299 * fill the offset and length of each descriptor.
300 *
301 * we use a temporary buffer to write the captured data.
302 * since the length of written data is determined by host, we cannot
303 * write onto the pcm buffer directly... the data is thus copied
304 * later at complete callback to the global buffer.
305 */
86e07d34
TI		 306static int prepare_capture_urb(struct snd_usb_substream *subs,
307 struct snd_pcm_runtime *runtime,
1da177e4
LT		 308 struct urb *urb)
309{
310 int i, offs;
86e07d34 311 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4
LT		 312
313 offs = 0;
314 urb->dev = ctx->subs->dev; /* we need to set this at each time */
1da177e4
LT		 315 for (i = 0; i < ctx->packets; i++) {
316 urb->iso_frame_desc[i].offset = offs;
317 urb->iso_frame_desc[i].length = subs->curpacksize;
318 offs += subs->curpacksize;
1da177e4 319 }
1da177e4 320 urb->transfer_buffer_length = offs;
b263a9bd 321 urb->number_of_packets = ctx->packets;
1da177e4
LT		 322#if 0 // for check
323 if (! urb->bandwidth) {
324 int bustime;
325 bustime = usb_check_bandwidth(urb->dev, urb);
326 if (bustime < 0)
327 return bustime;
328 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
329 usb_claim_bandwidth(urb->dev, urb, bustime, 1);
330 }
331#endif // for check
332 return 0;
333}
334
335/*
336 * process after capture complete
337 *
338 * copy the data from each desctiptor to the pcm buffer, and
339 * update the current position.
340 */
86e07d34
TI		 341static int retire_capture_urb(struct snd_usb_substream *subs,
342 struct snd_pcm_runtime *runtime,
1da177e4
LT		 343 struct urb *urb)
344{
345 unsigned long flags;
346 unsigned char *cp;
347 int i;
348 unsigned int stride, len, oldptr;
b263a9bd 349 int period_elapsed = 0;
1da177e4
LT		 350
351 stride = runtime->frame_bits >> 3;
352
353 for (i = 0; i < urb->number_of_packets; i++) {
354 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
355 if (urb->iso_frame_desc[i].status) {
356 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
357 // continue;
358 }
359 len = urb->iso_frame_desc[i].actual_length / stride;
360 if (! len)
361 continue;
362 /* update the current pointer */
363 spin_lock_irqsave(&subs->lock, flags);
364 oldptr = subs->hwptr_done;
365 subs->hwptr_done += len;
366 if (subs->hwptr_done >= runtime->buffer_size)
367 subs->hwptr_done -= runtime->buffer_size;
368 subs->transfer_done += len;
b263a9bd
CL		 369 if (subs->transfer_done >= runtime->period_size) {
370 subs->transfer_done -= runtime->period_size;
371 period_elapsed = 1;
372 }
1da177e4
LT		 373 spin_unlock_irqrestore(&subs->lock, flags);
374 /* copy a data chunk */
375 if (oldptr + len > runtime->buffer_size) {
376 unsigned int cnt = runtime->buffer_size - oldptr;
377 unsigned int blen = cnt * stride;
378 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
379 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
380 } else {
381 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
382 }
1da177e4 383 }
b263a9bd
CL		 384 if (period_elapsed)
385 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 386 return 0;
387}
388
389
390/*
391 * prepare urb for full speed playback sync pipe
392 *
393 * set up the offset and length to receive the current frequency.
394 */
395
86e07d34
TI		 396static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
397 struct snd_pcm_runtime *runtime,
1da177e4
LT		 398 struct urb *urb)
399{
86e07d34 400 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 401
1da177e4 402 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 403 urb->iso_frame_desc[0].length = 3;
404 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 405 return 0;
406}
407
408/*
409 * prepare urb for high speed playback sync pipe
410 *
411 * set up the offset and length to receive the current frequency.
412 */
413
86e07d34
TI		 414static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
415 struct snd_pcm_runtime *runtime,
1da177e4
LT		 416 struct urb *urb)
417{
86e07d34 418 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 419
1da177e4 420 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 421 urb->iso_frame_desc[0].length = 4;
422 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 423 return 0;
424}
425
426/*
427 * process after full speed playback sync complete
428 *
429 * retrieve the current 10.14 frequency from pipe, and set it.
430 * the value is referred in prepare_playback_urb().
431 */
86e07d34
TI		 432static int retire_playback_sync_urb(struct snd_usb_substream *subs,
433 struct snd_pcm_runtime *runtime,
1da177e4
LT		 434 struct urb *urb)
435{
ca81090a 436 unsigned int f;
1da177e4
LT		 437 unsigned long flags;
438
ca81090a
CL		 439 if (urb->iso_frame_desc[0].status == 0 &&
440 urb->iso_frame_desc[0].actual_length == 3) {
441 f = combine_triple((u8*)urb->transfer_buffer) << 2;
50cdbf15
CL		 442 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
443 spin_lock_irqsave(&subs->lock, flags);
444 subs->freqm = f;
445 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4 446 }
1da177e4
LT		 447 }
448
449 return 0;
450}
451
452/*
453 * process after high speed playback sync complete
454 *
455 * retrieve the current 12.13 frequency from pipe, and set it.
456 * the value is referred in prepare_playback_urb().
457 */
86e07d34
TI		 458static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
459 struct snd_pcm_runtime *runtime,
1da177e4
LT		 460 struct urb *urb)
461{
ca81090a 462 unsigned int f;
1da177e4
LT		 463 unsigned long flags;
464
ca81090a
CL		 465 if (urb->iso_frame_desc[0].status == 0 &&
466 urb->iso_frame_desc[0].actual_length == 4) {
467 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
50cdbf15
CL		 468 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
469 spin_lock_irqsave(&subs->lock, flags);
470 subs->freqm = f;
471 spin_unlock_irqrestore(&subs->lock, flags);
472 }
1da177e4
LT		 473 }
474
475 return 0;
476}
477
b55bbf06
CL		 478/*
479 * Prepare urb for streaming before playback starts.
480 *
481 * We don't care about (or have) any data, so we just send a transfer delimiter.
482 */
86e07d34
TI		 483static int prepare_startup_playback_urb(struct snd_usb_substream *subs,
484 struct snd_pcm_runtime *runtime,
b55bbf06
CL		 485 struct urb *urb)
486{
487 unsigned int i;
86e07d34 488 struct snd_urb_ctx *ctx = urb->context;
b55bbf06
CL		 489
490 urb->dev = ctx->subs->dev;
491 urb->number_of_packets = subs->packs_per_ms;
492 for (i = 0; i < subs->packs_per_ms; ++i) {
493 urb->iso_frame_desc[i].offset = 0;
494 urb->iso_frame_desc[i].length = 0;
495 }
496 urb->transfer_buffer_length = 0;
497 return 0;
498}
499
1da177e4
LT		 500/*
501 * prepare urb for playback data pipe
502 *
7efd8bc8
CL		 503 * Since a URB can handle only a single linear buffer, we must use double
504 * buffering when the data to be transferred overflows the buffer boundary.
505 * To avoid inconsistencies when updating hwptr_done, we use double buffering
506 * for all URBs.
1da177e4 507 */
86e07d34
TI		 508static int prepare_playback_urb(struct snd_usb_substream *subs,
509 struct snd_pcm_runtime *runtime,
1da177e4
LT		 510 struct urb *urb)
511{
512 int i, stride, offs;
513 unsigned int counts;
514 unsigned long flags;
7efd8bc8 515 int period_elapsed = 0;
86e07d34 516 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4
LT		 517
518 stride = runtime->frame_bits >> 3;
519
520 offs = 0;
521 urb->dev = ctx->subs->dev; /* we need to set this at each time */
522 urb->number_of_packets = 0;
523 spin_lock_irqsave(&subs->lock, flags);
524 for (i = 0; i < ctx->packets; i++) {
525 /* calculate the size of a packet */
526 if (subs->fill_max)
527 counts = subs->maxframesize; /* fixed */
528 else {
573567e0
CL		 529 subs->phase = (subs->phase & 0xffff)
530 + (subs->freqm << subs->datainterval);
1da177e4
LT		 531 counts = subs->phase >> 16;
532 if (counts > subs->maxframesize)
533 counts = subs->maxframesize;
534 }
535 /* set up descriptor */
536 urb->iso_frame_desc[i].offset = offs * stride;
537 urb->iso_frame_desc[i].length = counts * stride;
538 offs += counts;
539 urb->number_of_packets++;
7efd8bc8
CL		 540 subs->transfer_done += counts;
541 if (subs->transfer_done >= runtime->period_size) {
542 subs->transfer_done -= runtime->period_size;
543 period_elapsed = 1;
1da177e4 544 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
7efd8bc8
CL		 545 if (subs->transfer_done > 0) {
546 /* FIXME: fill-max mode is not
547 * supported yet */
548 offs -= subs->transfer_done;
549 counts -= subs->transfer_done;
550 urb->iso_frame_desc[i].length =
551 counts * stride;
552 subs->transfer_done = 0;
1da177e4
LT		 553 }
554 i++;
555 if (i < ctx->packets) {
556 /* add a transfer delimiter */
7efd8bc8
CL		 557 urb->iso_frame_desc[i].offset =
558 offs * stride;
1da177e4
LT		 559 urb->iso_frame_desc[i].length = 0;
560 urb->number_of_packets++;
561 }
9624ea81 562 break;
1da177e4 563 }
1da177e4 564 }
9624ea81
CL		 565 /* finish at the frame boundary at/after the period boundary */
566 if (period_elapsed &&
567 (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
568 break;
1da177e4 569 }
7efd8bc8
CL		 570 if (subs->hwptr_done + offs > runtime->buffer_size) {
571 /* err, the transferred area goes over buffer boundary. */
572 unsigned int len = runtime->buffer_size - subs->hwptr_done;
573 memcpy(urb->transfer_buffer,
574 runtime->dma_area + subs->hwptr_done * stride,
575 len * stride);
576 memcpy(urb->transfer_buffer + len * stride,
577 runtime->dma_area,
578 (offs - len) * stride);
1da177e4 579 } else {
7efd8bc8
CL		 580 memcpy(urb->transfer_buffer,
581 runtime->dma_area + subs->hwptr_done * stride,
582 offs * stride);
1da177e4 583 }
7efd8bc8
CL		 584 subs->hwptr_done += offs;
585 if (subs->hwptr_done >= runtime->buffer_size)
586 subs->hwptr_done -= runtime->buffer_size;
1da177e4
LT		 587 spin_unlock_irqrestore(&subs->lock, flags);
588 urb->transfer_buffer_length = offs * stride;
b55bbf06
CL		 589 if (period_elapsed)
590 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 591 return 0;
592}
593
594/*
595 * process after playback data complete
7efd8bc8 596 * - nothing to do
1da177e4 597 */
86e07d34
TI		 598static int retire_playback_urb(struct snd_usb_substream *subs,
599 struct snd_pcm_runtime *runtime,
1da177e4
LT		 600 struct urb *urb)
601{
1da177e4
LT		 602 return 0;
603}
604
605
606/*
607 */
608static struct snd_urb_ops audio_urb_ops[2] = {
609 {
b55bbf06 610 .prepare = prepare_startup_playback_urb,
1da177e4
LT		 611 .retire = retire_playback_urb,
612 .prepare_sync = prepare_playback_sync_urb,
613 .retire_sync = retire_playback_sync_urb,
614 },
615 {
616 .prepare = prepare_capture_urb,
617 .retire = retire_capture_urb,
618 .prepare_sync = prepare_capture_sync_urb,
619 .retire_sync = retire_capture_sync_urb,
620 },
621};
622
623static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
624 {
b55bbf06 625 .prepare = prepare_startup_playback_urb,
1da177e4
LT		 626 .retire = retire_playback_urb,
627 .prepare_sync = prepare_playback_sync_urb_hs,
628 .retire_sync = retire_playback_sync_urb_hs,
629 },
630 {
631 .prepare = prepare_capture_urb,
632 .retire = retire_capture_urb,
633 .prepare_sync = prepare_capture_sync_urb_hs,
634 .retire_sync = retire_capture_sync_urb,
635 },
636};
637
638/*
639 * complete callback from data urb
640 */
641static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
642{
86e07d34
TI		 643 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
644 struct snd_usb_substream *subs = ctx->subs;
645 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 646 int err = 0;
647
648 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
649 ! subs->running || /* can be stopped during retire callback */
650 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
651 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
652 clear_bit(ctx->index, &subs->active_mask);
653 if (err < 0) {
654 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
655 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
656 }
657 }
658}
659
660
661/*
662 * complete callback from sync urb
663 */
664static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
665{
86e07d34
TI		 666 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
667 struct snd_usb_substream *subs = ctx->subs;
668 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 669 int err = 0;
670
671 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
672 ! subs->running || /* can be stopped during retire callback */
673 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
674 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
675 clear_bit(ctx->index + 16, &subs->active_mask);
676 if (err < 0) {
677 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
678 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
679 }
680 }
681}
682
683
6207e51b 684/* get the physical page pointer at the given offset */
86e07d34 685static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
6207e51b
CL		 686 unsigned long offset)
687{
688 void *pageptr = subs->runtime->dma_area + offset;
689 return vmalloc_to_page(pageptr);
690}
691
692/* allocate virtual buffer; may be called more than once */
86e07d34 693static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
6207e51b 694{
86e07d34 695 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b
CL		 696 if (runtime->dma_area) {
697 if (runtime->dma_bytes >= size)
698 return 0; /* already large enough */
b1d5776d 699 vfree(runtime->dma_area);
6207e51b 700 }
b1d5776d 701 runtime->dma_area = vmalloc(size);
6207e51b
CL		 702 if (! runtime->dma_area)
703 return -ENOMEM;
704 runtime->dma_bytes = size;
705 return 0;
706}
707
708/* free virtual buffer; may be called more than once */
86e07d34 709static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
6207e51b 710{
86e07d34 711 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b 712 if (runtime->dma_area) {
b1d5776d 713 vfree(runtime->dma_area);
6207e51b
CL		 714 runtime->dma_area = NULL;
715 }
716 return 0;
717}
718
719
1da177e4
LT		 720/*
721 * unlink active urbs.
722 */
86e07d34 723static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
1da177e4
LT		 724{
725 unsigned int i;
726 int async;
727
728 subs->running = 0;
729
730 if (!force && subs->stream->chip->shutdown) /* to be sure... */
731 return -EBADFD;
732
733 async = !can_sleep && async_unlink;
734
735 if (! async && in_interrupt())
736 return 0;
737
738 for (i = 0; i < subs->nurbs; i++) {
739 if (test_bit(i, &subs->active_mask)) {
740 if (! test_and_set_bit(i, &subs->unlink_mask)) {
741 struct urb *u = subs->dataurb[i].urb;
b375a049 742 if (async)
1da177e4 743 usb_unlink_urb(u);
b375a049 744 else
1da177e4
LT		 745 usb_kill_urb(u);
746 }
747 }
748 }
749 if (subs->syncpipe) {
750 for (i = 0; i < SYNC_URBS; i++) {
751 if (test_bit(i+16, &subs->active_mask)) {
752 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
753 struct urb *u = subs->syncurb[i].urb;
b375a049 754 if (async)
1da177e4 755 usb_unlink_urb(u);
b375a049 756 else
1da177e4
LT		 757 usb_kill_urb(u);
758 }
759 }
760 }
761 }
762 return 0;
763}
764
765
766/*
767 * set up and start data/sync urbs
768 */
86e07d34 769static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
1da177e4
LT		 770{
771 unsigned int i;
772 int err;
773
774 if (subs->stream->chip->shutdown)
775 return -EBADFD;
776
777 for (i = 0; i < subs->nurbs; i++) {
778 snd_assert(subs->dataurb[i].urb, return -EINVAL);
779 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
780 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
781 goto __error;
782 }
783 }
784 if (subs->syncpipe) {
785 for (i = 0; i < SYNC_URBS; i++) {
786 snd_assert(subs->syncurb[i].urb, return -EINVAL);
787 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
788 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
789 goto __error;
790 }
791 }
792 }
793
794 subs->active_mask = 0;
795 subs->unlink_mask = 0;
796 subs->running = 1;
797 for (i = 0; i < subs->nurbs; i++) {
798 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
799 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
800 goto __error;
801 }
802 set_bit(i, &subs->active_mask);
803 }
804 if (subs->syncpipe) {
805 for (i = 0; i < SYNC_URBS; i++) {
806 if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
807 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
808 goto __error;
809 }
810 set_bit(i + 16, &subs->active_mask);
811 }
812 }
813 return 0;
814
815 __error:
816 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
817 deactivate_urbs(subs, 0, 0);
818 return -EPIPE;
819}
820
821
822/*
823 * wait until all urbs are processed.
824 */
86e07d34 825static int wait_clear_urbs(struct snd_usb_substream *subs)
1da177e4 826{
b27c187f 827 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 828 unsigned int i;
829 int alive;
830
831 do {
832 alive = 0;
833 for (i = 0; i < subs->nurbs; i++) {
834 if (test_bit(i, &subs->active_mask))
835 alive++;
836 }
837 if (subs->syncpipe) {
838 for (i = 0; i < SYNC_URBS; i++) {
839 if (test_bit(i + 16, &subs->active_mask))
840 alive++;
841 }
842 }
843 if (! alive)
844 break;
8433a509 845 schedule_timeout_uninterruptible(1);
b27c187f 846 } while (time_before(jiffies, end_time));
1da177e4
LT		 847 if (alive)
848 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
849 return 0;
850}
851
852
853/*
854 * return the current pcm pointer. just return the hwptr_done value.
855 */
86e07d34 856static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 857{
86e07d34 858 struct snd_usb_substream *subs;
daa150ef
CL		 859 snd_pcm_uframes_t hwptr_done;
860
86e07d34 861 subs = (struct snd_usb_substream *)substream->runtime->private_data;
daa150ef
CL		 862 spin_lock(&subs->lock);
863 hwptr_done = subs->hwptr_done;
864 spin_unlock(&subs->lock);
865 return hwptr_done;
1da177e4
LT		 866}
867
868
869/*
b55bbf06 870 * start/stop playback substream
1da177e4 871 */
86e07d34 872static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
b55bbf06 873 int cmd)
1da177e4 874{
86e07d34 875 struct snd_usb_substream *subs = substream->runtime->private_data;
b55bbf06
CL		 876
877 switch (cmd) {
878 case SNDRV_PCM_TRIGGER_START:
879 subs->ops.prepare = prepare_playback_urb;
880 return 0;
881 case SNDRV_PCM_TRIGGER_STOP:
882 return deactivate_urbs(subs, 0, 0);
883 default:
884 return -EINVAL;
885 }
886}
887
888/*
889 * start/stop capture substream
890 */
86e07d34 891static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
b55bbf06
CL		 892 int cmd)
893{
86e07d34 894 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 895
896 switch (cmd) {
897 case SNDRV_PCM_TRIGGER_START:
b55bbf06 898 return start_urbs(subs, substream->runtime);
1da177e4 899 case SNDRV_PCM_TRIGGER_STOP:
b55bbf06 900 return deactivate_urbs(subs, 0, 0);
1da177e4 901 default:
b55bbf06 902 return -EINVAL;
1da177e4 903 }
1da177e4
LT		 904}
905
906
907/*
908 * release a urb data
909 */
86e07d34 910static void release_urb_ctx(struct snd_urb_ctx *u)
1da177e4
LT		 911{
912 if (u->urb) {
55851f73
CL		 913 if (u->buffer_size)
914 usb_buffer_free(u->subs->dev, u->buffer_size,
915 u->urb->transfer_buffer,
916 u->urb->transfer_dma);
1da177e4
LT		 917 usb_free_urb(u->urb);
918 u->urb = NULL;
919 }
1da177e4
LT		 920}
921
922/*
923 * release a substream
924 */
86e07d34 925static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1da177e4
LT		 926{
927 int i;
928
929 /* stop urbs (to be sure) */
930 deactivate_urbs(subs, force, 1);
931 wait_clear_urbs(subs);
932
933 for (i = 0; i < MAX_URBS; i++)
934 release_urb_ctx(&subs->dataurb[i]);
935 for (i = 0; i < SYNC_URBS; i++)
936 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 937 usb_buffer_free(subs->dev, SYNC_URBS * 4,
938 subs->syncbuf, subs->sync_dma);
939 subs->syncbuf = NULL;
1da177e4
LT		 940 subs->nurbs = 0;
941}
942
943/*
944 * initialize a substream for plaback/capture
945 */
86e07d34 946static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1da177e4
LT		 947 unsigned int rate, unsigned int frame_bits)
948{
949 unsigned int maxsize, n, i;
950 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
a93bf990 951 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 952
953 /* calculate the frequency in 16.16 format */
954 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
955 subs->freqn = get_usb_full_speed_rate(rate);
956 else
957 subs->freqn = get_usb_high_speed_rate(rate);
958 subs->freqm = subs->freqn;
573567e0
CL		 959 /* calculate max. frequency */
960 if (subs->maxpacksize) {
961 /* whatever fits into a max. size packet */
1da177e4 962 maxsize = subs->maxpacksize;
573567e0
CL		 963 subs->freqmax = (maxsize / (frame_bits >> 3))
964 << (16 - subs->datainterval);
965 } else {
966 /* no max. packet size: just take 25% higher than nominal */
967 subs->freqmax = subs->freqn + (subs->freqn >> 2);
968 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
969 >> (16 - subs->datainterval);
1da177e4 970 }
573567e0 971 subs->phase = 0;
1da177e4
LT		 972
973 if (subs->fill_max)
974 subs->curpacksize = subs->maxpacksize;
975 else
976 subs->curpacksize = maxsize;
977
a93bf990
CL		 978 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
979 packs_per_ms = 8 >> subs->datainterval;
980 else
981 packs_per_ms = 1;
9624ea81 982 subs->packs_per_ms = packs_per_ms;
a93bf990 983
71d848ca 984 if (is_playback) {
1da177e4 985 urb_packs = nrpacks;
71d848ca
CL		 986 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
987 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
988 } else
15a24c07 989 urb_packs = 1;
a93bf990 990 urb_packs *= packs_per_ms;
1da177e4 991
1da177e4 992 /* decide how many packets to be used */
15a24c07 993 if (is_playback) {
d6db392e
CL		 994 unsigned int minsize;
995 /* determine how small a packet can be */
996 minsize = (subs->freqn >> (16 - subs->datainterval))
997 * (frame_bits >> 3);
7efd8bc8 998 /* with sync from device, assume it can be 12% lower */
d6db392e 999 if (subs->syncpipe)
7efd8bc8 1000 minsize -= minsize >> 3;
d6db392e
CL		 1001 minsize = max(minsize, 1u);
1002 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990
CL		 1003 /* round up to multiple of packs_per_ms */
1004 total_packs = (total_packs + packs_per_ms - 1)
1005 & ~(packs_per_ms - 1);
1006 /* we need at least two URBs for queueing */
1007 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
1008 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
15a24c07
CL		 1009 } else {
1010 total_packs = MAX_URBS * urb_packs;
1011 }
1da177e4
LT		 1012 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1013 if (subs->nurbs > MAX_URBS) {
1014 /* too much... */
1015 subs->nurbs = MAX_URBS;
1016 total_packs = MAX_URBS * urb_packs;
1017 }
1018 n = total_packs;
1019 for (i = 0; i < subs->nurbs; i++) {
1020 npacks[i] = n > urb_packs ? urb_packs : n;
1021 n -= urb_packs;
1022 }
1023 if (subs->nurbs <= 1) {
1024 /* too little - we need at least two packets
1025 * to ensure contiguous playback/capture
1026 */
1027 subs->nurbs = 2;
1028 npacks[0] = (total_packs + 1) / 2;
1029 npacks[1] = total_packs - npacks[0];
a93bf990 1030 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1da177e4
LT		 1031 /* the last packet is too small.. */
1032 if (subs->nurbs > 2) {
1033 /* merge to the first one */
1034 npacks[0] += npacks[subs->nurbs - 1];
1035 subs->nurbs--;
1036 } else {
1037 /* divide to two */
1038 subs->nurbs = 2;
1039 npacks[0] = (total_packs + 1) / 2;
1040 npacks[1] = total_packs - npacks[0];
1041 }
1042 }
1043
1044 /* allocate and initialize data urbs */
1045 for (i = 0; i < subs->nurbs; i++) {
86e07d34 1046 struct snd_urb_ctx *u = &subs->dataurb[i];
1da177e4
LT		 1047 u->index = i;
1048 u->subs = subs;
1da177e4 1049 u->packets = npacks[i];
55851f73 1050 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1051 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1052 u->packets++; /* for transfer delimiter */
1da177e4 1053 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
55851f73
CL		 1054 if (! u->urb)
1055 goto out_of_memory;
1056 u->urb->transfer_buffer =
1057 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1058 &u->urb->transfer_dma);
1059 if (! u->urb->transfer_buffer)
1060 goto out_of_memory;
1da177e4 1061 u->urb->pipe = subs->datapipe;
55851f73 1062 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1063 u->urb->interval = 1 << subs->datainterval;
1da177e4 1064 u->urb->context = u;
3527a008 1065 u->urb->complete = snd_complete_urb;
1da177e4
LT		 1066 }
1067
1068 if (subs->syncpipe) {
1069 /* allocate and initialize sync urbs */
55851f73
CL		 1070 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1071 GFP_KERNEL, &subs->sync_dma);
1072 if (! subs->syncbuf)
1073 goto out_of_memory;
1da177e4 1074 for (i = 0; i < SYNC_URBS; i++) {
86e07d34 1075 struct snd_urb_ctx *u = &subs->syncurb[i];
1da177e4
LT		 1076 u->index = i;
1077 u->subs = subs;
ca81090a
CL		 1078 u->packets = 1;
1079 u->urb = usb_alloc_urb(1, GFP_KERNEL);
55851f73
CL		 1080 if (! u->urb)
1081 goto out_of_memory;
ca81090a 1082 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1083 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1084 u->urb->transfer_buffer_length = 4;
1da177e4 1085 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1086 u->urb->transfer_flags = URB_ISO_ASAP |
1087 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1088 u->urb->number_of_packets = 1;
1149a64f 1089 u->urb->interval = 1 << subs->syncinterval;
1da177e4 1090 u->urb->context = u;
3527a008 1091 u->urb->complete = snd_complete_sync_urb;
1da177e4
LT		 1092 }
1093 }
1094 return 0;
55851f73
CL		 1095
1096out_of_memory:
1097 release_substream_urbs(subs, 0);
1098 return -ENOMEM;
1da177e4
LT		 1099}
1100
1101
1102/*
1103 * find a matching audio format
1104 */
86e07d34 1105static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1da177e4
LT		 1106 unsigned int rate, unsigned int channels)
1107{
1108 struct list_head *p;
1109 struct audioformat *found = NULL;
1110 int cur_attr = 0, attr;
1111
1112 list_for_each(p, &subs->fmt_list) {
1113 struct audioformat *fp;
1114 fp = list_entry(p, struct audioformat, list);
1115 if (fp->format != format || fp->channels != channels)
1116 continue;
1117 if (rate < fp->rate_min || rate > fp->rate_max)
1118 continue;
1119 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1120 unsigned int i;
1121 for (i = 0; i < fp->nr_rates; i++)
1122 if (fp->rate_table[i] == rate)
1123 break;
1124 if (i >= fp->nr_rates)
1125 continue;
1126 }
1127 attr = fp->ep_attr & EP_ATTR_MASK;
1128 if (! found) {
1129 found = fp;
1130 cur_attr = attr;
1131 continue;
1132 }
1133 /* avoid async out and adaptive in if the other method
1134 * supports the same format.
1135 * this is a workaround for the case like
1136 * M-audio audiophile USB.
1137 */
1138 if (attr != cur_attr) {
1139 if ((attr == EP_ATTR_ASYNC &&
1140 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1141 (attr == EP_ATTR_ADAPTIVE &&
1142 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1143 continue;
1144 if ((cur_attr == EP_ATTR_ASYNC &&
1145 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1146 (cur_attr == EP_ATTR_ADAPTIVE &&
1147 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1148 found = fp;
1149 cur_attr = attr;
1150 continue;
1151 }
1152 }
1153 /* find the format with the largest max. packet size */
1154 if (fp->maxpacksize > found->maxpacksize) {
1155 found = fp;
1156 cur_attr = attr;
1157 }
1158 }
1159 return found;
1160}
1161
1162
1163/*
1164 * initialize the picth control and sample rate
1165 */
1166static int init_usb_pitch(struct usb_device *dev, int iface,
1167 struct usb_host_interface *alts,
1168 struct audioformat *fmt)
1169{
1170 unsigned int ep;
1171 unsigned char data[1];
1172 int err;
1173
1174 ep = get_endpoint(alts, 0)->bEndpointAddress;
1175 /* if endpoint has pitch control, enable it */
1176 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1177 data[0] = 1;
1178 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1179 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1180 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1181 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1182 dev->devnum, iface, ep);
1183 return err;
1184 }
1185 }
1186 return 0;
1187}
1188
1189static int init_usb_sample_rate(struct usb_device *dev, int iface,
1190 struct usb_host_interface *alts,
1191 struct audioformat *fmt, int rate)
1192{
1193 unsigned int ep;
1194 unsigned char data[3];
1195 int err;
1196
1197 ep = get_endpoint(alts, 0)->bEndpointAddress;
1198 /* if endpoint has sampling rate control, set it */
1199 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1200 int crate;
1201 data[0] = rate;
1202 data[1] = rate >> 8;
1203 data[2] = rate >> 16;
1204 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1205 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1206 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1207 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1208 dev->devnum, iface, fmt->altsetting, rate, ep);
1209 return err;
1210 }
1211 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1212 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1213 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1214 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1215 dev->devnum, iface, fmt->altsetting, ep);
1216 return 0; /* some devices don't support reading */
1217 }
1218 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1219 if (crate != rate) {
1220 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1221 // runtime->rate = crate;
1222 }
1223 }
1224 return 0;
1225}
1226
1227/*
1228 * find a matching format and set up the interface
1229 */
86e07d34 1230static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1da177e4
LT		 1231{
1232 struct usb_device *dev = subs->dev;
1233 struct usb_host_interface *alts;
1234 struct usb_interface_descriptor *altsd;
1235 struct usb_interface *iface;
1236 unsigned int ep, attr;
1237 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1238 int err;
1239
1240 iface = usb_ifnum_to_if(dev, fmt->iface);
1241 snd_assert(iface, return -EINVAL);
1242 alts = &iface->altsetting[fmt->altset_idx];
1243 altsd = get_iface_desc(alts);
1244 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1245
1246 if (fmt == subs->cur_audiofmt)
1247 return 0;
1248
1249 /* close the old interface */
1250 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1251 usb_set_interface(subs->dev, subs->interface, 0);
1252 subs->interface = -1;
1253 subs->format = 0;
1254 }
1255
1256 /* set interface */
1257 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1258 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1259 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1260 dev->devnum, fmt->iface, fmt->altsetting);
1261 return -EIO;
1262 }
1263 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1264 subs->interface = fmt->iface;
1265 subs->format = fmt->altset_idx;
1266 }
1267
1268 /* create a data pipe */
1269 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1270 if (is_playback)
1271 subs->datapipe = usb_sndisocpipe(dev, ep);
1272 else
1273 subs->datapipe = usb_rcvisocpipe(dev, ep);
573567e0
CL		 1274 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1275 get_endpoint(alts, 0)->bInterval >= 1 &&
1276 get_endpoint(alts, 0)->bInterval <= 4)
1277 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1278 else
1279 subs->datainterval = 0;
1da177e4
LT		 1280 subs->syncpipe = subs->syncinterval = 0;
1281 subs->maxpacksize = fmt->maxpacksize;
1282 subs->fill_max = 0;
1283
1284 /* we need a sync pipe in async OUT or adaptive IN mode */
1285 /* check the number of EP, since some devices have broken
1286 * descriptors which fool us. if it has only one EP,
1287 * assume it as adaptive-out or sync-in.
1288 */
1289 attr = fmt->ep_attr & EP_ATTR_MASK;
1290 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1291 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1292 altsd->bNumEndpoints >= 2) {
1293 /* check sync-pipe endpoint */
1294 /* ... and check descriptor size before accessing bSynchAddress
1295 because there is a version of the SB Audigy 2 NX firmware lacking
1296 the audio fields in the endpoint descriptors */
1297 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1298 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1299 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1300 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1301 dev->devnum, fmt->iface, fmt->altsetting);
1302 return -EINVAL;
1303 }
1304 ep = get_endpoint(alts, 1)->bEndpointAddress;
1305 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1306 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1307 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1308 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1309 dev->devnum, fmt->iface, fmt->altsetting);
1310 return -EINVAL;
1311 }
1312 ep &= USB_ENDPOINT_NUMBER_MASK;
1313 if (is_playback)
1314 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1315 else
1316 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1317 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1318 get_endpoint(alts, 1)->bRefresh >= 1 &&
1319 get_endpoint(alts, 1)->bRefresh <= 9)
1320 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1321 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1322 subs->syncinterval = 1;
604cf499
CL		 1323 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1324 get_endpoint(alts, 1)->bInterval <= 16)
1325 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1326 else
1327 subs->syncinterval = 3;
1da177e4
LT		 1328 }
1329
1330 /* always fill max packet size */
1331 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1332 subs->fill_max = 1;
1333
1334 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1335 return err;
1336
1337 subs->cur_audiofmt = fmt;
1338
1339#if 0
1340 printk("setting done: format = %d, rate = %d, channels = %d\n",
1341 fmt->format, fmt->rate, fmt->channels);
1342 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1343 subs->datapipe, subs->syncpipe);
1344#endif
1345
1346 return 0;
1347}
1348
1349/*
1350 * hw_params callback
1351 *
1352 * allocate a buffer and set the given audio format.
1353 *
1354 * so far we use a physically linear buffer although packetize transfer
1355 * doesn't need a continuous area.
1356 * if sg buffer is supported on the later version of alsa, we'll follow
1357 * that.
1358 */
86e07d34
TI		 1359static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1360 struct snd_pcm_hw_params *hw_params)
1da177e4 1361{
86e07d34 1362 struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
1da177e4
LT		 1363 struct audioformat *fmt;
1364 unsigned int channels, rate, format;
1365 int ret, changed;
1366
6207e51b
CL		 1367 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1368 params_buffer_bytes(hw_params));
1da177e4
LT		 1369 if (ret < 0)
1370 return ret;
1371
1372 format = params_format(hw_params);
1373 rate = params_rate(hw_params);
1374 channels = params_channels(hw_params);
1375 fmt = find_format(subs, format, rate, channels);
1376 if (! fmt) {
1377 snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
1378 snd_pcm_format_name(format), rate, channels);
1379 return -EINVAL;
1380 }
1381
1382 changed = subs->cur_audiofmt != fmt ||
1383 subs->period_bytes != params_period_bytes(hw_params) ||
1384 subs->cur_rate != rate;
1385 if ((ret = set_format(subs, fmt)) < 0)
1386 return ret;
1387
1388 if (subs->cur_rate != rate) {
1389 struct usb_host_interface *alts;
1390 struct usb_interface *iface;
1391 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1392 alts = &iface->altsetting[fmt->altset_idx];
1393 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1394 if (ret < 0)
1395 return ret;
1396 subs->cur_rate = rate;
1397 }
1398
1399 if (changed) {
1400 /* format changed */
1401 release_substream_urbs(subs, 0);
1402 /* influenced: period_bytes, channels, rate, format, */
1403 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1404 params_rate(hw_params),
1405 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1406 }
1407
1408 return ret;
1409}
1410
1411/*
1412 * hw_free callback
1413 *
1414 * reset the audio format and release the buffer
1415 */
86e07d34 1416static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1da177e4 1417{
86e07d34 1418 struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
1da177e4
LT		 1419
1420 subs->cur_audiofmt = NULL;
1421 subs->cur_rate = 0;
1422 subs->period_bytes = 0;
1423 release_substream_urbs(subs, 0);
6207e51b 1424 return snd_pcm_free_vmalloc_buffer(substream);
1da177e4
LT		 1425}
1426
1427/*
1428 * prepare callback
1429 *
1430 * only a few subtle things...
1431 */
86e07d34 1432static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 1433{
86e07d34
TI		 1434 struct snd_pcm_runtime *runtime = substream->runtime;
1435 struct snd_usb_substream *subs = runtime->private_data;
1da177e4
LT		 1436
1437 if (! subs->cur_audiofmt) {
1438 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1439 return -ENXIO;
1440 }
1441
1442 /* some unit conversions in runtime */
1443 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1444 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1445
1446 /* reset the pointer */
1da177e4 1447 subs->hwptr_done = 0;
1da177e4
LT		 1448 subs->transfer_done = 0;
1449 subs->phase = 0;
1450
1451 /* clear urbs (to be sure) */
1452 deactivate_urbs(subs, 0, 1);
1453 wait_clear_urbs(subs);
1454
b55bbf06
CL		 1455 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1456 * updates for all URBs would happen at the same time when starting */
1457 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1458 subs->ops.prepare = prepare_startup_playback_urb;
1459 return start_urbs(subs, runtime);
1460 } else
1461 return 0;
1da177e4
LT		 1462}
1463
86e07d34 1464static struct snd_pcm_hardware snd_usb_playback =
1da177e4 1465{
49045d3d
CL		 1466 .info = SNDRV_PCM_INFO_MMAP |
1467 SNDRV_PCM_INFO_MMAP_VALID |
1468 SNDRV_PCM_INFO_BATCH |
1469 SNDRV_PCM_INFO_INTERLEAVED |
1470 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1471 .buffer_bytes_max = 1024 * 1024,
1da177e4 1472 .period_bytes_min = 64,
d31cbbfd 1473 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1474 .periods_min = 2,
1475 .periods_max = 1024,
1476};
1477
86e07d34 1478static struct snd_pcm_hardware snd_usb_capture =
1da177e4 1479{
49045d3d
CL		 1480 .info = SNDRV_PCM_INFO_MMAP |
1481 SNDRV_PCM_INFO_MMAP_VALID |
1482 SNDRV_PCM_INFO_BATCH |
1483 SNDRV_PCM_INFO_INTERLEAVED |
1484 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1485 .buffer_bytes_max = 1024 * 1024,
1da177e4 1486 .period_bytes_min = 64,
d31cbbfd 1487 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1488 .periods_min = 2,
1489 .periods_max = 1024,
1490};
1491
1492/*
1493 * h/w constraints
1494 */
1495
1496#ifdef HW_CONST_DEBUG
1497#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1498#else
1499#define hwc_debug(fmt, args...) /**/
1500#endif
1501
86e07d34 1502static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
1da177e4 1503{
86e07d34
TI		 1504 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1505 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1506 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1507
1508 /* check the format */
1509 if (! snd_mask_test(fmts, fp->format)) {
1510 hwc_debug(" > check: no supported format %d\n", fp->format);
1511 return 0;
1512 }
1513 /* check the channels */
1514 if (fp->channels < ct->min || fp->channels > ct->max) {
1515 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1516 return 0;
1517 }
1518 /* check the rate is within the range */
1519 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1520 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1521 return 0;
1522 }
1523 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1524 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1525 return 0;
1526 }
1527 return 1;
1528}
1529
86e07d34
TI		 1530static int hw_rule_rate(struct snd_pcm_hw_params *params,
1531 struct snd_pcm_hw_rule *rule)
1da177e4 1532{
86e07d34 1533 struct snd_usb_substream *subs = rule->private;
1da177e4 1534 struct list_head *p;
86e07d34 1535 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 1536 unsigned int rmin, rmax;
1537 int changed;
1538
1539 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1540 changed = 0;
1541 rmin = rmax = 0;
1542 list_for_each(p, &subs->fmt_list) {
1543 struct audioformat *fp;
1544 fp = list_entry(p, struct audioformat, list);
1545 if (! hw_check_valid_format(params, fp))
1546 continue;
1547 if (changed++) {
1548 if (rmin > fp->rate_min)
1549 rmin = fp->rate_min;
1550 if (rmax < fp->rate_max)
1551 rmax = fp->rate_max;
1552 } else {
1553 rmin = fp->rate_min;
1554 rmax = fp->rate_max;
1555 }
1556 }
1557
1558 if (! changed) {
1559 hwc_debug(" --> get empty\n");
1560 it->empty = 1;
1561 return -EINVAL;
1562 }
1563
1564 changed = 0;
1565 if (it->min < rmin) {
1566 it->min = rmin;
1567 it->openmin = 0;
1568 changed = 1;
1569 }
1570 if (it->max > rmax) {
1571 it->max = rmax;
1572 it->openmax = 0;
1573 changed = 1;
1574 }
1575 if (snd_interval_checkempty(it)) {
1576 it->empty = 1;
1577 return -EINVAL;
1578 }
1579 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1580 return changed;
1581}
1582
1583
86e07d34
TI		 1584static int hw_rule_channels(struct snd_pcm_hw_params *params,
1585 struct snd_pcm_hw_rule *rule)
1da177e4 1586{
86e07d34 1587 struct snd_usb_substream *subs = rule->private;
1da177e4 1588 struct list_head *p;
86e07d34 1589 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1da177e4
LT		 1590 unsigned int rmin, rmax;
1591 int changed;
1592
1593 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1594 changed = 0;
1595 rmin = rmax = 0;
1596 list_for_each(p, &subs->fmt_list) {
1597 struct audioformat *fp;
1598 fp = list_entry(p, struct audioformat, list);
1599 if (! hw_check_valid_format(params, fp))
1600 continue;
1601 if (changed++) {
1602 if (rmin > fp->channels)
1603 rmin = fp->channels;
1604 if (rmax < fp->channels)
1605 rmax = fp->channels;
1606 } else {
1607 rmin = fp->channels;
1608 rmax = fp->channels;
1609 }
1610 }
1611
1612 if (! changed) {
1613 hwc_debug(" --> get empty\n");
1614 it->empty = 1;
1615 return -EINVAL;
1616 }
1617
1618 changed = 0;
1619 if (it->min < rmin) {
1620 it->min = rmin;
1621 it->openmin = 0;
1622 changed = 1;
1623 }
1624 if (it->max > rmax) {
1625 it->max = rmax;
1626 it->openmax = 0;
1627 changed = 1;
1628 }
1629 if (snd_interval_checkempty(it)) {
1630 it->empty = 1;
1631 return -EINVAL;
1632 }
1633 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1634 return changed;
1635}
1636
86e07d34
TI		 1637static int hw_rule_format(struct snd_pcm_hw_params *params,
1638 struct snd_pcm_hw_rule *rule)
1da177e4 1639{
86e07d34 1640 struct snd_usb_substream *subs = rule->private;
1da177e4 1641 struct list_head *p;
86e07d34 1642 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1643 u64 fbits;
1644 u32 oldbits[2];
1645 int changed;
1646
1647 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1648 fbits = 0;
1649 list_for_each(p, &subs->fmt_list) {
1650 struct audioformat *fp;
1651 fp = list_entry(p, struct audioformat, list);
1652 if (! hw_check_valid_format(params, fp))
1653 continue;
1654 fbits |= (1ULL << fp->format);
1655 }
1656
1657 oldbits[0] = fmt->bits[0];
1658 oldbits[1] = fmt->bits[1];
1659 fmt->bits[0] &= (u32)fbits;
1660 fmt->bits[1] &= (u32)(fbits >> 32);
1661 if (! fmt->bits[0] && ! fmt->bits[1]) {
1662 hwc_debug(" --> get empty\n");
1663 return -EINVAL;
1664 }
1665 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1666 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1667 return changed;
1668}
1669
1670#define MAX_MASK 64
1671
1672/*
1673 * check whether the registered audio formats need special hw-constraints
1674 */
86e07d34 1675static int check_hw_params_convention(struct snd_usb_substream *subs)
1da177e4
LT		 1676{
1677 int i;
1678 u32 *channels;
1679 u32 *rates;
1680 u32 cmaster, rmaster;
1681 u32 rate_min = 0, rate_max = 0;
1682 struct list_head *p;
1683 int err = 1;
1684
1685 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1686 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1687
1688 list_for_each(p, &subs->fmt_list) {
1689 struct audioformat *f;
1690 f = list_entry(p, struct audioformat, list);
1691 /* unconventional channels? */
1692 if (f->channels > 32)
1693 goto __out;
1694 /* continuous rate min/max matches? */
1695 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1696 if (rate_min && f->rate_min != rate_min)
1697 goto __out;
1698 if (rate_max && f->rate_max != rate_max)
1699 goto __out;
1700 rate_min = f->rate_min;
1701 rate_max = f->rate_max;
1702 }
1703 /* combination of continuous rates and fixed rates? */
1704 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1705 if (f->rates != rates[f->format])
1706 goto __out;
1707 }
1708 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1709 if (rates[f->format] && rates[f->format] != f->rates)
1710 goto __out;
1711 }
1712 channels[f->format] |= (1 << f->channels);
1713 rates[f->format] |= f->rates;
1714 }
1715 /* check whether channels and rates match for all formats */
1716 cmaster = rmaster = 0;
1717 for (i = 0; i < MAX_MASK; i++) {
1718 if (cmaster != channels[i] && cmaster && channels[i])
1719 goto __out;
1720 if (rmaster != rates[i] && rmaster && rates[i])
1721 goto __out;
1722 if (channels[i])
1723 cmaster = channels[i];
1724 if (rates[i])
1725 rmaster = rates[i];
1726 }
1727 /* check whether channels match for all distinct rates */
1728 memset(channels, 0, MAX_MASK * sizeof(u32));
1729 list_for_each(p, &subs->fmt_list) {
1730 struct audioformat *f;
1731 f = list_entry(p, struct audioformat, list);
1732 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1733 continue;
1734 for (i = 0; i < 32; i++) {
1735 if (f->rates & (1 << i))
1736 channels[i] |= (1 << f->channels);
1737 }
1738 }
1739 cmaster = 0;
1740 for (i = 0; i < 32; i++) {
1741 if (cmaster != channels[i] && cmaster && channels[i])
1742 goto __out;
1743 if (channels[i])
1744 cmaster = channels[i];
1745 }
1746 err = 0;
1747
1748 __out:
1749 kfree(channels);
1750 kfree(rates);
1751 return err;
1752}
1753
1754
1755/*
1756 * set up the runtime hardware information.
1757 */
1758
86e07d34 1759static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1da177e4
LT		 1760{
1761 struct list_head *p;
1762 int err;
1763
1764 runtime->hw.formats = subs->formats;
1765
1766 runtime->hw.rate_min = 0x7fffffff;
1767 runtime->hw.rate_max = 0;
1768 runtime->hw.channels_min = 256;
1769 runtime->hw.channels_max = 0;
1770 runtime->hw.rates = 0;
1771 /* check min/max rates and channels */
1772 list_for_each(p, &subs->fmt_list) {
1773 struct audioformat *fp;
1774 fp = list_entry(p, struct audioformat, list);
1775 runtime->hw.rates |= fp->rates;
1776 if (runtime->hw.rate_min > fp->rate_min)
1777 runtime->hw.rate_min = fp->rate_min;
1778 if (runtime->hw.rate_max < fp->rate_max)
1779 runtime->hw.rate_max = fp->rate_max;
1780 if (runtime->hw.channels_min > fp->channels)
1781 runtime->hw.channels_min = fp->channels;
1782 if (runtime->hw.channels_max < fp->channels)
1783 runtime->hw.channels_max = fp->channels;
1784 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1785 /* FIXME: there might be more than one audio formats... */
1786 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1787 fp->frame_size;
1788 }
1789 }
1790
1791 /* set the period time minimum 1ms */
1792 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1793 1000 * MIN_PACKS_URB,
1794 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1795
1796 if (check_hw_params_convention(subs)) {
1797 hwc_debug("setting extra hw constraints...\n");
1798 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1799 hw_rule_rate, subs,
1800 SNDRV_PCM_HW_PARAM_FORMAT,
1801 SNDRV_PCM_HW_PARAM_CHANNELS,
1802 -1)) < 0)
1803 return err;
1804 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1805 hw_rule_channels, subs,
1806 SNDRV_PCM_HW_PARAM_FORMAT,
1807 SNDRV_PCM_HW_PARAM_RATE,
1808 -1)) < 0)
1809 return err;
1810 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1811 hw_rule_format, subs,
1812 SNDRV_PCM_HW_PARAM_RATE,
1813 SNDRV_PCM_HW_PARAM_CHANNELS,
1814 -1)) < 0)
1815 return err;
1816 }
1817 return 0;
1818}
1819
86e07d34
TI		 1820static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction,
1821 struct snd_pcm_hardware *hw)
1da177e4 1822{
86e07d34
TI		 1823 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1824 struct snd_pcm_runtime *runtime = substream->runtime;
1825 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1826
1827 subs->interface = -1;
1828 subs->format = 0;
1829 runtime->hw = *hw;
1830 runtime->private_data = subs;
1831 subs->pcm_substream = substream;
1832 return setup_hw_info(runtime, subs);
1833}
1834
86e07d34 1835static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1da177e4 1836{
86e07d34
TI		 1837 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1838 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1839
1840 if (subs->interface >= 0) {
1841 usb_set_interface(subs->dev, subs->interface, 0);
1842 subs->interface = -1;
1843 }
1844 subs->pcm_substream = NULL;
1845 return 0;
1846}
1847
86e07d34 1848static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1da177e4
LT		 1849{
1850 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1851}
1852
86e07d34 1853static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1854{
1855 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1856}
1857
86e07d34 1858static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1da177e4
LT		 1859{
1860 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1861}
1862
86e07d34 1863static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1864{
1865 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1866}
1867
86e07d34 1868static struct snd_pcm_ops snd_usb_playback_ops = {
1da177e4
LT		 1869 .open = snd_usb_playback_open,
1870 .close = snd_usb_playback_close,
1871 .ioctl = snd_pcm_lib_ioctl,
1872 .hw_params = snd_usb_hw_params,
1873 .hw_free = snd_usb_hw_free,
1874 .prepare = snd_usb_pcm_prepare,
b55bbf06 1875 .trigger = snd_usb_pcm_playback_trigger,
1da177e4 1876 .pointer = snd_usb_pcm_pointer,
6207e51b 1877 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1878};
1879
86e07d34 1880static struct snd_pcm_ops snd_usb_capture_ops = {
1da177e4
LT		 1881 .open = snd_usb_capture_open,
1882 .close = snd_usb_capture_close,
1883 .ioctl = snd_pcm_lib_ioctl,
1884 .hw_params = snd_usb_hw_params,
1885 .hw_free = snd_usb_hw_free,
1886 .prepare = snd_usb_pcm_prepare,
b55bbf06 1887 .trigger = snd_usb_pcm_capture_trigger,
1da177e4 1888 .pointer = snd_usb_pcm_pointer,
6207e51b 1889 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1890};
1891
1892
1893
1894/*
1895 * helper functions
1896 */
1897
1898/*
1899 * combine bytes and get an integer value
1900 */
1901unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1902{
1903 switch (size) {
1904 case 1: return *bytes;
1905 case 2: return combine_word(bytes);
1906 case 3: return combine_triple(bytes);
1907 case 4: return combine_quad(bytes);
1908 default: return 0;
1909 }
1910}
1911
1912/*
1913 * parse descriptor buffer and return the pointer starting the given
1914 * descriptor type.
1915 */
1916void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1917{
1918 u8 *p, *end, *next;
1919
1920 p = descstart;
1921 end = p + desclen;
1922 for (; p < end;) {
1923 if (p[0] < 2)
1924 return NULL;
1925 next = p + p[0];
1926 if (next > end)
1927 return NULL;
1928 if (p[1] == dtype && (!after || (void *)p > after)) {
1929 return p;
1930 }
1931 p = next;
1932 }
1933 return NULL;
1934}
1935
1936/*
1937 * find a class-specified interface descriptor with the given subtype.
1938 */
1939void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1940{
1941 unsigned char *p = after;
1942
1943 while ((p = snd_usb_find_desc(buffer, buflen, p,
1944 USB_DT_CS_INTERFACE)) != NULL) {
1945 if (p[0] >= 3 && p[2] == dsubtype)
1946 return p;
1947 }
1948 return NULL;
1949}
1950
1951/*
1952 * Wrapper for usb_control_msg().
1953 * Allocates a temp buffer to prevent dmaing from/to the stack.
1954 */
1955int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1956 __u8 requesttype, __u16 value, __u16 index, void *data,
1957 __u16 size, int timeout)
1958{
1959 int err;
1960 void *buf = NULL;
1961
1962 if (size > 0) {
1963 buf = kmalloc(size, GFP_KERNEL);
1964 if (!buf)
1965 return -ENOMEM;
1966 memcpy(buf, data, size);
1967 }
1968 err = usb_control_msg(dev, pipe, request, requesttype,
1969 value, index, buf, size, timeout);
1970 if (size > 0) {
1971 memcpy(data, buf, size);
1972 kfree(buf);
1973 }
1974 return err;
1975}
1976
1977
1978/*
1979 * entry point for linux usb interface
1980 */
1981
1982static int usb_audio_probe(struct usb_interface *intf,
1983 const struct usb_device_id *id);
1984static void usb_audio_disconnect(struct usb_interface *intf);
1985
1986static struct usb_device_id usb_audio_ids [] = {
1987#include "usbquirks.h"
1988 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1989 .bInterfaceClass = USB_CLASS_AUDIO,
1990 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
1991 { } /* Terminating entry */
1992};
1993
1994MODULE_DEVICE_TABLE (usb, usb_audio_ids);
1995
1996static struct usb_driver usb_audio_driver = {
1997 .owner = THIS_MODULE,
1998 .name = "snd-usb-audio",
1999 .probe = usb_audio_probe,
2000 .disconnect = usb_audio_disconnect,
2001 .id_table = usb_audio_ids,
2002};
2003
2004
2005/*
2006 * proc interface for list the supported pcm formats
2007 */
86e07d34 2008static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2009{
2010 struct list_head *p;
2011 static char *sync_types[4] = {
2012 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2013 };
2014
2015 list_for_each(p, &subs->fmt_list) {
2016 struct audioformat *fp;
2017 fp = list_entry(p, struct audioformat, list);
2018 snd_iprintf(buffer, " Interface %d\n", fp->iface);
2019 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
2020 snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
2021 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
2022 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
2023 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2024 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2025 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2026 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2027 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2028 fp->rate_min, fp->rate_max);
2029 } else {
2030 unsigned int i;
2031 snd_iprintf(buffer, " Rates: ");
2032 for (i = 0; i < fp->nr_rates; i++) {
2033 if (i > 0)
2034 snd_iprintf(buffer, ", ");
2035 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2036 }
2037 snd_iprintf(buffer, "\n");
2038 }
2039 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2040 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2041 }
2042}
2043
86e07d34 2044static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2045{
2046 if (subs->running) {
2047 unsigned int i;
2048 snd_iprintf(buffer, " Status: Running\n");
2049 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2050 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2051 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2052 for (i = 0; i < subs->nurbs; i++)
2053 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2054 snd_iprintf(buffer, "]\n");
2055 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2056 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2057 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2058 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2059 : get_high_speed_hz(subs->freqm),
2060 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2061 } else {
2062 snd_iprintf(buffer, " Status: Stop\n");
2063 }
2064}
2065
86e07d34 2066static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 2067{
86e07d34 2068 struct snd_usb_stream *stream = entry->private_data;
1da177e4
LT		 2069
2070 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2071
2072 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2073 snd_iprintf(buffer, "\nPlayback:\n");
2074 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2075 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2076 }
2077 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2078 snd_iprintf(buffer, "\nCapture:\n");
2079 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2080 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2081 }
2082}
2083
86e07d34 2084static void proc_pcm_format_add(struct snd_usb_stream *stream)
1da177e4 2085{
86e07d34 2086 struct snd_info_entry *entry;
1da177e4 2087 char name[32];
86e07d34 2088 struct snd_card *card = stream->chip->card;
1da177e4
LT		 2089
2090 sprintf(name, "stream%d", stream->pcm_index);
2091 if (! snd_card_proc_new(card, name, &entry))
2092 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2093}
2094
2095
2096/*
2097 * initialize the substream instance.
2098 */
2099
86e07d34 2100static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
1da177e4 2101{
86e07d34 2102 struct snd_usb_substream *subs = &as->substream[stream];
1da177e4
LT		 2103
2104 INIT_LIST_HEAD(&subs->fmt_list);
2105 spin_lock_init(&subs->lock);
2106
2107 subs->stream = as;
2108 subs->direction = stream;
2109 subs->dev = as->chip->dev;
2110 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2111 subs->ops = audio_urb_ops[stream];
2112 else
2113 subs->ops = audio_urb_ops_high_speed[stream];
1da177e4
LT		 2114 snd_pcm_set_ops(as->pcm, stream,
2115 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2116 &snd_usb_playback_ops : &snd_usb_capture_ops);
2117
2118 list_add_tail(&fp->list, &subs->fmt_list);
2119 subs->formats |= 1ULL << fp->format;
2120 subs->endpoint = fp->endpoint;
2121 subs->num_formats++;
2122 subs->fmt_type = fp->fmt_type;
2123}
2124
2125
2126/*
2127 * free a substream
2128 */
86e07d34 2129static void free_substream(struct snd_usb_substream *subs)
1da177e4
LT		 2130{
2131 struct list_head *p, *n;
2132
2133 if (! subs->num_formats)
2134 return; /* not initialized */
2135 list_for_each_safe(p, n, &subs->fmt_list) {
2136 struct audioformat *fp = list_entry(p, struct audioformat, list);
2137 kfree(fp->rate_table);
2138 kfree(fp);
2139 }
2140}
2141
2142
2143/*
2144 * free a usb stream instance
2145 */
86e07d34 2146static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
1da177e4
LT		 2147{
2148 free_substream(&stream->substream[0]);
2149 free_substream(&stream->substream[1]);
2150 list_del(&stream->list);
2151 kfree(stream);
2152}
2153
86e07d34 2154static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
1da177e4 2155{
86e07d34 2156 struct snd_usb_stream *stream = pcm->private_data;
1da177e4
LT		 2157 if (stream) {
2158 stream->pcm = NULL;
1da177e4
LT		 2159 snd_usb_audio_stream_free(stream);
2160 }
2161}
2162
2163
2164/*
2165 * add this endpoint to the chip instance.
2166 * if a stream with the same endpoint already exists, append to it.
2167 * if not, create a new pcm stream.
2168 */
86e07d34 2169static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
1da177e4
LT		 2170{
2171 struct list_head *p;
86e07d34
TI		 2172 struct snd_usb_stream *as;
2173 struct snd_usb_substream *subs;
2174 struct snd_pcm *pcm;
1da177e4
LT		 2175 int err;
2176
2177 list_for_each(p, &chip->pcm_list) {
86e07d34 2178 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2179 if (as->fmt_type != fp->fmt_type)
2180 continue;
2181 subs = &as->substream[stream];
2182 if (! subs->endpoint)
2183 continue;
2184 if (subs->endpoint == fp->endpoint) {
2185 list_add_tail(&fp->list, &subs->fmt_list);
2186 subs->num_formats++;
2187 subs->formats |= 1ULL << fp->format;
2188 return 0;
2189 }
2190 }
2191 /* look for an empty stream */
2192 list_for_each(p, &chip->pcm_list) {
86e07d34 2193 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2194 if (as->fmt_type != fp->fmt_type)
2195 continue;
2196 subs = &as->substream[stream];
2197 if (subs->endpoint)
2198 continue;
2199 err = snd_pcm_new_stream(as->pcm, stream, 1);
2200 if (err < 0)
2201 return err;
2202 init_substream(as, stream, fp);
2203 return 0;
2204 }
2205
2206 /* create a new pcm */
2207 as = kmalloc(sizeof(*as), GFP_KERNEL);
2208 if (! as)
2209 return -ENOMEM;
2210 memset(as, 0, sizeof(*as));
2211 as->pcm_index = chip->pcm_devs;
2212 as->chip = chip;
2213 as->fmt_type = fp->fmt_type;
2214 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2215 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2216 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2217 &pcm);
2218 if (err < 0) {
2219 kfree(as);
2220 return err;
2221 }
2222 as->pcm = pcm;
2223 pcm->private_data = as;
2224 pcm->private_free = snd_usb_audio_pcm_free;
2225 pcm->info_flags = 0;
2226 if (chip->pcm_devs > 0)
2227 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2228 else
2229 strcpy(pcm->name, "USB Audio");
2230
2231 init_substream(as, stream, fp);
2232
2233 list_add(&as->list, &chip->pcm_list);
2234 chip->pcm_devs++;
2235
2236 proc_pcm_format_add(as);
2237
2238 return 0;
2239}
2240
2241
2242/*
2243 * check if the device uses big-endian samples
2244 */
86e07d34 2245static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1da177e4 2246{
27d10f56
CL		 2247 switch (chip->usb_id) {
2248 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2249 if (fp->endpoint & USB_DIR_IN)
1da177e4 2250 return 1;
27d10f56
CL		 2251 break;
2252 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2253 return 1;
1da177e4
LT		 2254 }
2255 return 0;
2256}
2257
2258/*
2259 * parse the audio format type I descriptor
2260 * and returns the corresponding pcm format
2261 *
2262 * @dev: usb device
2263 * @fp: audioformat record
2264 * @format: the format tag (wFormatTag)
2265 * @fmt: the format type descriptor
2266 */
86e07d34 2267static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2268 int format, unsigned char *fmt)
2269{
2270 int pcm_format;
2271 int sample_width, sample_bytes;
2272
2273 /* FIXME: correct endianess and sign? */
2274 pcm_format = -1;
2275 sample_width = fmt[6];
2276 sample_bytes = fmt[5];
2277 switch (format) {
2278 case 0: /* some devices don't define this correctly... */
2279 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2280 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2281 /* fall-through */
2282 case USB_AUDIO_FORMAT_PCM:
2283 if (sample_width > sample_bytes * 8) {
2284 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2285 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2286 sample_width, sample_bytes);
2287 }
2288 /* check the format byte size */
2289 switch (fmt[5]) {
2290 case 1:
2291 pcm_format = SNDRV_PCM_FORMAT_S8;
2292 break;
2293 case 2:
27d10f56 2294 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2295 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2296 else
2297 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2298 break;
2299 case 3:
27d10f56 2300 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2301 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2302 else
2303 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2304 break;
2305 case 4:
2306 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2307 break;
2308 default:
2309 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2310 chip->dev->devnum, fp->iface,
2311 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2312 break;
2313 }
2314 break;
2315 case USB_AUDIO_FORMAT_PCM8:
2316 /* Dallas DS4201 workaround */
27d10f56 2317 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4
LT		 2318 pcm_format = SNDRV_PCM_FORMAT_S8;
2319 else
2320 pcm_format = SNDRV_PCM_FORMAT_U8;
2321 break;
2322 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2323 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2324 break;
2325 case USB_AUDIO_FORMAT_ALAW:
2326 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2327 break;
2328 case USB_AUDIO_FORMAT_MU_LAW:
2329 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2330 break;
2331 default:
2332 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2333 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2334 break;
2335 }
2336 return pcm_format;
2337}
2338
2339
2340/*
2341 * parse the format descriptor and stores the possible sample rates
2342 * on the audioformat table.
2343 *
2344 * @dev: usb device
2345 * @fp: audioformat record
2346 * @fmt: the format descriptor
2347 * @offset: the start offset of descriptor pointing the rate type
2348 * (7 for type I and II, 8 for type II)
2349 */
86e07d34 2350static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2351 unsigned char *fmt, int offset)
2352{
2353 int nr_rates = fmt[offset];
2354 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2355 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2356 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2357 return -1;
2358 }
2359
2360 if (nr_rates) {
2361 /*
2362 * build the rate table and bitmap flags
2363 */
2364 int r, idx, c;
2365 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2366 static unsigned int conv_rates[] = {
2367 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2368 64000, 88200, 96000, 176400, 192000
2369 };
2370 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2371 if (fp->rate_table == NULL) {
2372 snd_printk(KERN_ERR "cannot malloc\n");
2373 return -1;
2374 }
2375
2376 fp->nr_rates = nr_rates;
2377 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2378 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2379 unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2380 if (rate < fp->rate_min)
2381 fp->rate_min = rate;
2382 else if (rate > fp->rate_max)
2383 fp->rate_max = rate;
2384 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2385 if (rate == conv_rates[c]) {
2386 fp->rates |= (1 << c);
2387 break;
2388 }
2389 }
2390 }
2391 } else {
2392 /* continuous rates */
2393 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2394 fp->rate_min = combine_triple(&fmt[offset + 1]);
2395 fp->rate_max = combine_triple(&fmt[offset + 4]);
2396 }
2397 return 0;
2398}
2399
2400/*
2401 * parse the format type I and III descriptors
2402 */
86e07d34 2403static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2404 int format, unsigned char *fmt)
2405{
2406 int pcm_format;
2407
2408 if (fmt[3] == USB_FORMAT_TYPE_III) {
2409 /* FIXME: the format type is really IECxxx
2410 * but we give normal PCM format to get the existing
2411 * apps working...
2412 */
2413 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2414 } else {
27d10f56 2415 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2416 if (pcm_format < 0)
2417 return -1;
2418 }
2419 fp->format = pcm_format;
2420 fp->channels = fmt[4];
2421 if (fp->channels < 1) {
2422 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2423 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2424 return -1;
2425 }
27d10f56 2426 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2427}
2428
2429/*
2430 * prase the format type II descriptor
2431 */
86e07d34 2432static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2433 int format, unsigned char *fmt)
2434{
2435 int brate, framesize;
2436 switch (format) {
2437 case USB_AUDIO_FORMAT_AC3:
2438 /* FIXME: there is no AC3 format defined yet */
2439 // fp->format = SNDRV_PCM_FORMAT_AC3;
2440 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2441 break;
2442 case USB_AUDIO_FORMAT_MPEG:
2443 fp->format = SNDRV_PCM_FORMAT_MPEG;
2444 break;
2445 default:
2446 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
27d10f56 2447 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2448 fp->format = SNDRV_PCM_FORMAT_MPEG;
2449 break;
2450 }
2451 fp->channels = 1;
2452 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2453 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2454 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2455 fp->frame_size = framesize;
27d10f56 2456 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2457}
2458
86e07d34 2459static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2460 int format, unsigned char *fmt, int stream)
2461{
2462 int err;
2463
2464 switch (fmt[3]) {
2465 case USB_FORMAT_TYPE_I:
2466 case USB_FORMAT_TYPE_III:
27d10f56 2467 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2468 break;
2469 case USB_FORMAT_TYPE_II:
27d10f56 2470 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2471 break;
2472 default:
2473 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2474 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2475 return -1;
2476 }
2477 fp->fmt_type = fmt[3];
2478 if (err < 0)
2479 return err;
2480#if 1
8c1872dc 2481 /* FIXME: temporary hack for extigy/audigy 2 nx */
1da177e4
LT		 2482 /* extigy apparently supports sample rates other than 48k
2483 * but not in ordinary way. so we enable only 48k atm.
2484 */
27d10f56
CL		 2485 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2486 chip->usb_id == USB_ID(0x041e, 0x3020)) {
1da177e4 2487 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2488 fp->rates != SNDRV_PCM_RATE_48000 &&
2489 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2490 return -1;
1da177e4
LT		 2491 }
2492#endif
2493 return 0;
2494}
2495
86e07d34 2496static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
1da177e4
LT		 2497{
2498 struct usb_device *dev;
2499 struct usb_interface *iface;
2500 struct usb_host_interface *alts;
2501 struct usb_interface_descriptor *altsd;
2502 int i, altno, err, stream;
2503 int format;
2504 struct audioformat *fp;
2505 unsigned char *fmt, *csep;
2506
2507 dev = chip->dev;
2508
2509 /* parse the interface's altsettings */
2510 iface = usb_ifnum_to_if(dev, iface_no);
2511 for (i = 0; i < iface->num_altsetting; i++) {
2512 alts = &iface->altsetting[i];
2513 altsd = get_iface_desc(alts);
2514 /* skip invalid one */
2515 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2516 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2517 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2518 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2519 altsd->bNumEndpoints < 1 ||
2520 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2521 continue;
2522 /* must be isochronous */
2523 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2524 USB_ENDPOINT_XFER_ISOC)
2525 continue;
2526 /* check direction */
2527 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2528 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2529 altno = altsd->bAlternateSetting;
2530
2531 /* get audio formats */
2532 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2533 if (!fmt) {
2534 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2535 dev->devnum, iface_no, altno);
2536 continue;
2537 }
2538
2539 if (fmt[0] < 7) {
2540 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2541 dev->devnum, iface_no, altno);
2542 continue;
2543 }
2544
2545 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2546
2547 /* get format type */
2548 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2549 if (!fmt) {
2550 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2551 dev->devnum, iface_no, altno);
2552 continue;
2553 }
2554 if (fmt[0] < 8) {
2555 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2556 dev->devnum, iface_no, altno);
2557 continue;
2558 }
2559
2560 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2561 /* Creamware Noah has this descriptor after the 2nd endpoint */
2562 if (!csep && altsd->bNumEndpoints >= 2)
2563 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2564 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2565 snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2566 dev->devnum, iface_no, altno);
2567 continue;
2568 }
2569
2570 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2571 if (! fp) {
2572 snd_printk(KERN_ERR "cannot malloc\n");
2573 return -ENOMEM;
2574 }
2575
2576 memset(fp, 0, sizeof(*fp));
2577 fp->iface = iface_no;
2578 fp->altsetting = altno;
2579 fp->altset_idx = i;
2580 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2581 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
1da177e4 2582 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2583 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2584 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2585 * (fp->maxpacksize & 0x7ff);
1da177e4
LT		 2586 fp->attributes = csep[3];
2587
2588 /* some quirks for attributes here */
2589
c3f93297
CL		 2590 switch (chip->usb_id) {
2591 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2592 /* Optoplay sets the sample rate attribute although
2593 * it seems not supporting it in fact.
2594 */
2595 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2596 break;
2597 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2598 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2599 /* doesn't set the sample rate attribute, but supports it */
2600 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2601 break;
2602 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2603 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2604 an older model 77d:223) */
1da177e4
LT		 2605 /*
2606 * plantronics headset and Griffin iMic have set adaptive-in
2607 * although it's really not...
2608 */
1da177e4
LT		 2609 fp->ep_attr &= ~EP_ATTR_MASK;
2610 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2611 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2612 else
2613 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2614 break;
1da177e4
LT		 2615 }
2616
2617 /* ok, let's parse further... */
27d10f56 2618 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2619 kfree(fp->rate_table);
2620 kfree(fp);
2621 continue;
2622 }
2623
2624 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2625 err = add_audio_endpoint(chip, stream, fp);
2626 if (err < 0) {
2627 kfree(fp->rate_table);
2628 kfree(fp);
2629 return err;
2630 }
2631 /* try to set the interface... */
2632 usb_set_interface(chip->dev, iface_no, altno);
2633 init_usb_pitch(chip->dev, iface_no, alts, fp);
2634 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2635 }
2636 return 0;
2637}
2638
2639
2640/*
2641 * disconnect streams
2642 * called from snd_usb_audio_disconnect()
2643 */
ee733397 2644static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2645{
2646 int idx;
86e07d34
TI		 2647 struct snd_usb_stream *as;
2648 struct snd_usb_substream *subs;
1da177e4 2649
86e07d34 2650 as = list_entry(head, struct snd_usb_stream, list);
1da177e4
LT		 2651 for (idx = 0; idx < 2; idx++) {
2652 subs = &as->substream[idx];
2653 if (!subs->num_formats)
2654 return;
2655 release_substream_urbs(subs, 1);
2656 subs->interface = -1;
2657 }
2658}
2659
2660/*
2661 * parse audio control descriptor and create pcm/midi streams
2662 */
86e07d34 2663static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
1da177e4
LT		 2664{
2665 struct usb_device *dev = chip->dev;
2666 struct usb_host_interface *host_iface;
2667 struct usb_interface *iface;
2668 unsigned char *p1;
2669 int i, j;
2670
2671 /* find audiocontrol interface */
2672 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2673 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2674 snd_printk(KERN_ERR "cannot find HEADER\n");
2675 return -EINVAL;
2676 }
2677 if (! p1[7] || p1[0] < 8 + p1[7]) {
2678 snd_printk(KERN_ERR "invalid HEADER\n");
2679 return -EINVAL;
2680 }
2681
2682 /*
2683 * parse all USB audio streaming interfaces
2684 */
2685 for (i = 0; i < p1[7]; i++) {
2686 struct usb_host_interface *alts;
2687 struct usb_interface_descriptor *altsd;
2688 j = p1[8 + i];
2689 iface = usb_ifnum_to_if(dev, j);
2690 if (!iface) {
2691 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2692 dev->devnum, ctrlif, j);
2693 continue;
2694 }
2695 if (usb_interface_claimed(iface)) {
2696 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2697 continue;
2698 }
2699 alts = &iface->altsetting[0];
2700 altsd = get_iface_desc(alts);
2701 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2702 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2703 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2704 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2705 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2706 continue;
2707 }
2708 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2709 continue;
2710 }
2711 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2712 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2713 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2714 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2715 /* skip non-supported classes */
2716 continue;
2717 }
2718 if (! parse_audio_endpoints(chip, j)) {
2719 usb_set_interface(dev, j, 0); /* reset the current interface */
2720 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2721 }
2722 }
2723
2724 return 0;
2725}
2726
2727/*
2728 * create a stream for an endpoint/altsetting without proper descriptors
2729 */
86e07d34 2730static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
1da177e4 2731 struct usb_interface *iface,
86e07d34 2732 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2733{
2734 struct audioformat *fp;
2735 struct usb_host_interface *alts;
2736 int stream, err;
2737 int *rate_table = NULL;
2738
2739 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2740 if (! fp) {
2741 snd_printk(KERN_ERR "cannot malloc\n");
2742 return -ENOMEM;
2743 }
2744 memcpy(fp, quirk->data, sizeof(*fp));
2745 if (fp->nr_rates > 0) {
2746 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2747 if (!rate_table) {
2748 kfree(fp);
2749 return -ENOMEM;
2750 }
2751 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2752 fp->rate_table = rate_table;
2753 }
2754
2755 stream = (fp->endpoint & USB_DIR_IN)
2756 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2757 err = add_audio_endpoint(chip, stream, fp);
2758 if (err < 0) {
2759 kfree(fp);
2760 kfree(rate_table);
2761 return err;
2762 }
2763 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2764 fp->altset_idx >= iface->num_altsetting) {
2765 kfree(fp);
2766 kfree(rate_table);
2767 return -EINVAL;
2768 }
2769 alts = &iface->altsetting[fp->altset_idx];
2770 usb_set_interface(chip->dev, fp->iface, 0);
2771 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2772 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2773 return 0;
2774}
2775
2776/*
2777 * create a stream for an interface with proper descriptors
2778 */
86e07d34 2779static int create_standard_audio_quirk(struct snd_usb_audio *chip,
d1bda045 2780 struct usb_interface *iface,
86e07d34 2781 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2782{
2783 struct usb_host_interface *alts;
2784 struct usb_interface_descriptor *altsd;
2785 int err;
2786
2787 alts = &iface->altsetting[0];
2788 altsd = get_iface_desc(alts);
d1bda045 2789 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
1da177e4
LT		 2790 if (err < 0) {
2791 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2792 altsd->bInterfaceNumber, err);
2793 return err;
2794 }
d1bda045
CL		 2795 /* reset the current interface */
2796 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
1da177e4
LT		 2797 return 0;
2798}
2799
2800/*
2801 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2802 * to detect the sample rate is by looking at wMaxPacketSize.
2803 */
86e07d34 2804static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
854af957 2805 struct usb_interface *iface,
86e07d34 2806 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2807{
2808 static const struct audioformat ua_format = {
2809 .format = SNDRV_PCM_FORMAT_S24_3LE,
2810 .channels = 2,
2811 .fmt_type = USB_FORMAT_TYPE_I,
2812 .altsetting = 1,
2813 .altset_idx = 1,
2814 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2815 };
2816 struct usb_host_interface *alts;
2817 struct usb_interface_descriptor *altsd;
2818 struct audioformat *fp;
2819 int stream, err;
2820
2821 /* both PCM and MIDI interfaces have 2 altsettings */
2822 if (iface->num_altsetting != 2)
2823 return -ENXIO;
2824 alts = &iface->altsetting[1];
2825 altsd = get_iface_desc(alts);
2826
2827 if (altsd->bNumEndpoints == 2) {
86e07d34 2828 static const struct snd_usb_midi_endpoint_info ua700_ep = {
1da177e4
LT		 2829 .out_cables = 0x0003,
2830 .in_cables = 0x0003
2831 };
86e07d34 2832 static const struct snd_usb_audio_quirk ua700_quirk = {
1da177e4
LT		 2833 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2834 .data = &ua700_ep
2835 };
86e07d34 2836 static const struct snd_usb_midi_endpoint_info ua25_ep = {
1da177e4
LT		 2837 .out_cables = 0x0001,
2838 .in_cables = 0x0001
2839 };
86e07d34 2840 static const struct snd_usb_audio_quirk ua25_quirk = {
1da177e4
LT		 2841 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2842 .data = &ua25_ep
2843 };
27d10f56 2844 if (chip->usb_id == USB_ID(0x0582, 0x002b))
1da177e4
LT		 2845 return snd_usb_create_midi_interface(chip, iface,
2846 &ua700_quirk);
2847 else
2848 return snd_usb_create_midi_interface(chip, iface,
2849 &ua25_quirk);
2850 }
2851
2852 if (altsd->bNumEndpoints != 1)
2853 return -ENXIO;
2854
2855 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2856 if (!fp)
2857 return -ENOMEM;
2858 memcpy(fp, &ua_format, sizeof(*fp));
2859
2860 fp->iface = altsd->bInterfaceNumber;
2861 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2862 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2863 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2864
2865 switch (fp->maxpacksize) {
2866 case 0x120:
2867 fp->rate_max = fp->rate_min = 44100;
2868 break;
2869 case 0x138:
2870 case 0x140:
2871 fp->rate_max = fp->rate_min = 48000;
2872 break;
2873 case 0x258:
2874 case 0x260:
2875 fp->rate_max = fp->rate_min = 96000;
2876 break;
2877 default:
2878 snd_printk(KERN_ERR "unknown sample rate\n");
2879 kfree(fp);
2880 return -ENXIO;
2881 }
2882
2883 stream = (fp->endpoint & USB_DIR_IN)
2884 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2885 err = add_audio_endpoint(chip, stream, fp);
2886 if (err < 0) {
2887 kfree(fp);
2888 return err;
2889 }
2890 usb_set_interface(chip->dev, fp->iface, 0);
2891 return 0;
2892}
2893
2894/*
2895 * Create a stream for an Edirol UA-1000 interface.
2896 */
86e07d34 2897static int create_ua1000_quirk(struct snd_usb_audio *chip,
854af957 2898 struct usb_interface *iface,
86e07d34 2899 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2900{
2901 static const struct audioformat ua1000_format = {
2902 .format = SNDRV_PCM_FORMAT_S32_LE,
2903 .fmt_type = USB_FORMAT_TYPE_I,
2904 .altsetting = 1,
2905 .altset_idx = 1,
2906 .attributes = 0,
2907 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2908 };
2909 struct usb_host_interface *alts;
2910 struct usb_interface_descriptor *altsd;
2911 struct audioformat *fp;
2912 int stream, err;
2913
2914 if (iface->num_altsetting != 2)
2915 return -ENXIO;
2916 alts = &iface->altsetting[1];
2917 altsd = get_iface_desc(alts);
2918 if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2919 altsd->bNumEndpoints != 1)
2920 return -ENXIO;
2921
2922 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2923 if (!fp)
2924 return -ENOMEM;
2925 memcpy(fp, &ua1000_format, sizeof(*fp));
2926
2927 fp->channels = alts->extra[4];
2928 fp->iface = altsd->bInterfaceNumber;
2929 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2930 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2931 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2932 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2933
2934 stream = (fp->endpoint & USB_DIR_IN)
2935 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2936 err = add_audio_endpoint(chip, stream, fp);
2937 if (err < 0) {
2938 kfree(fp);
2939 return err;
2940 }
2941 /* FIXME: playback must be synchronized to capture */
2942 usb_set_interface(chip->dev, fp->iface, 0);
2943 return 0;
2944}
2945
86e07d34 2946static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 2947 struct usb_interface *iface,
86e07d34 2948 const struct snd_usb_audio_quirk *quirk);
1da177e4
LT		 2949
2950/*
2951 * handle the quirks for the contained interfaces
2952 */
86e07d34 2953static int create_composite_quirk(struct snd_usb_audio *chip,
1da177e4 2954 struct usb_interface *iface,
86e07d34 2955 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2956{
2957 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2958 int err;
2959
2960 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2961 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2962 if (!iface)
2963 continue;
2964 if (quirk->ifnum != probed_ifnum &&
2965 usb_interface_claimed(iface))
2966 continue;
2967 err = snd_usb_create_quirk(chip, iface, quirk);
2968 if (err < 0)
2969 return err;
2970 if (quirk->ifnum != probed_ifnum)
2971 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2972 }
2973 return 0;
2974}
2975
86e07d34 2976static int ignore_interface_quirk(struct snd_usb_audio *chip,
854af957 2977 struct usb_interface *iface,
86e07d34 2978 const struct snd_usb_audio_quirk *quirk)
854af957
CL		 2979{
2980 return 0;
2981}
2982
1da177e4
LT		 2983
2984/*
2985 * boot quirks
2986 */
2987
2988#define EXTIGY_FIRMWARE_SIZE_OLD 794
2989#define EXTIGY_FIRMWARE_SIZE_NEW 483
2990
2991static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
2992{
2993 struct usb_host_config *config = dev->actconfig;
2994 int err;
2995
2996 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
2997 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
2998 snd_printdd("sending Extigy boot sequence...\n");
2999 /* Send message to force it to reconnect with full interface. */
3000 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3001 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3002 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3003 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3004 &dev->descriptor, sizeof(dev->descriptor));
3005 config = dev->actconfig;
3006 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3007 err = usb_reset_configuration(dev);
3008 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3009 snd_printdd("extigy_boot: new boot length = %d\n",
3010 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3011 return -ENODEV; /* quit this anyway */
3012 }
3013 return 0;
3014}
3015
3a2f0856
CL		 3016static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3017{
3a2f0856
CL		 3018 u8 buf = 1;
3019
3020 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3021 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3022 0, 0, &buf, 1, 1000);
3023 if (buf == 0) {
3024 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3025 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3026 1, 2000, NULL, 0, 1000);
3027 return -ENODEV;
3028 }
3a2f0856
CL		 3029 return 0;
3030}
3031
1da177e4
LT		 3032
3033/*
3034 * audio-interface quirks
3035 *
3036 * returns zero if no standard audio/MIDI parsing is needed.
3037 * returns a postive value if standard audio/midi interfaces are parsed
3038 * after this.
3039 * returns a negative value at error.
3040 */
86e07d34 3041static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3042 struct usb_interface *iface,
86e07d34 3043 const struct snd_usb_audio_quirk *quirk)
1da177e4 3044{
86e07d34
TI		 3045 typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
3046 const struct snd_usb_audio_quirk *);
854af957
CL		 3047 static const quirk_func_t quirk_funcs[] = {
3048 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3049 [QUIRK_COMPOSITE] = create_composite_quirk,
3050 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3051 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3052 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3053 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3054 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3055 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3056 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3057 [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface,
d1bda045 3058 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
854af957
CL		 3059 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3060 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3061 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3062 };
3063
3064 if (quirk->type < QUIRK_TYPE_COUNT) {
3065 return quirk_funcs[quirk->type](chip, iface, quirk);
3066 } else {
1da177e4
LT		 3067 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3068 return -ENXIO;
3069 }
3070}
3071
3072
3073/*
3074 * common proc files to show the usb device info
3075 */
86e07d34 3076static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3077{
86e07d34 3078 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3079 if (! chip->shutdown)
3080 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3081}
3082
86e07d34 3083static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3084{
86e07d34 3085 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3086 if (! chip->shutdown)
3087 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3088 USB_ID_VENDOR(chip->usb_id),
3089 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3090}
3091
86e07d34 3092static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
1da177e4 3093{
86e07d34 3094 struct snd_info_entry *entry;
1da177e4
LT		 3095 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3096 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3097 if (! snd_card_proc_new(chip->card, "usbid", &entry))
3098 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3099}
3100
3101/*
3102 * free the chip instance
3103 *
3104 * here we have to do not much, since pcm and controls are already freed
3105 *
3106 */
3107
86e07d34 3108static int snd_usb_audio_free(struct snd_usb_audio *chip)
1da177e4
LT		 3109{
3110 kfree(chip);
3111 return 0;
3112}
3113
86e07d34 3114static int snd_usb_audio_dev_free(struct snd_device *device)
1da177e4 3115{
86e07d34 3116 struct snd_usb_audio *chip = device->device_data;
1da177e4
LT		 3117 return snd_usb_audio_free(chip);
3118}
3119
3120
3121/*
3122 * create a chip instance and set its names.
3123 */
3124static int snd_usb_audio_create(struct usb_device *dev, int idx,
86e07d34
TI		 3125 const struct snd_usb_audio_quirk *quirk,
3126 struct snd_usb_audio **rchip)
1da177e4 3127{
86e07d34
TI		 3128 struct snd_card *card;
3129 struct snd_usb_audio *chip;
1da177e4
LT		 3130 int err, len;
3131 char component[14];
86e07d34 3132 static struct snd_device_ops ops = {
1da177e4
LT		 3133 .dev_free = snd_usb_audio_dev_free,
3134 };
3135
3136 *rchip = NULL;
3137
3138 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3139 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3140 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3141 return -ENXIO;
3142 }
3143
3144 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3145 if (card == NULL) {
3146 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3147 return -ENOMEM;
3148 }
3149
561b220a 3150 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4
LT		 3151 if (! chip) {
3152 snd_card_free(card);
3153 return -ENOMEM;
3154 }
3155
3156 chip->index = idx;
3157 chip->dev = dev;
3158 chip->card = card;
27d10f56
CL		 3159 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3160 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3161 INIT_LIST_HEAD(&chip->pcm_list);
3162 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3163 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3164
3165 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3166 snd_usb_audio_free(chip);
3167 snd_card_free(card);
3168 return err;
3169 }
3170
3171 strcpy(card->driver, "USB-Audio");
3172 sprintf(component, "USB%04x:%04x",
27d10f56 3173 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3174 snd_component_add(card, component);
3175
3176 /* retrieve the device string as shortname */
3177 if (quirk && quirk->product_name) {
3178 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3179 } else {
3180 if (!dev->descriptor.iProduct ||
3181 usb_string(dev, dev->descriptor.iProduct,
3182 card->shortname, sizeof(card->shortname)) <= 0) {
3183 /* no name available from anywhere, so use ID */
3184 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3185 USB_ID_VENDOR(chip->usb_id),
3186 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3187 }
3188 }
3189
3190 /* retrieve the vendor and device strings as longname */
3191 if (quirk && quirk->vendor_name) {
3192 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3193 } else {
3194 if (dev->descriptor.iManufacturer)
3195 len = usb_string(dev, dev->descriptor.iManufacturer,
3196 card->longname, sizeof(card->longname));
3197 else
3198 len = 0;
3199 /* we don't really care if there isn't any vendor string */
3200 }
3201 if (len > 0)
3202 strlcat(card->longname, " ", sizeof(card->longname));
3203
3204 strlcat(card->longname, card->shortname, sizeof(card->longname));
3205
3206 len = strlcat(card->longname, " at ", sizeof(card->longname));
3207
3208 if (len < sizeof(card->longname))
3209 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3210
3211 strlcat(card->longname,
3212 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3213 sizeof(card->longname));
3214
3215 snd_usb_audio_create_proc(chip);
3216
1da177e4
LT		 3217 *rchip = chip;
3218 return 0;
3219}
3220
3221
3222/*
3223 * probe the active usb device
3224 *
3225 * note that this can be called multiple times per a device, when it
3226 * includes multiple audio control interfaces.
3227 *
3228 * thus we check the usb device pointer and creates the card instance
3229 * only at the first time. the successive calls of this function will
3230 * append the pcm interface to the corresponding card.
3231 */
3232static void *snd_usb_audio_probe(struct usb_device *dev,
3233 struct usb_interface *intf,
3234 const struct usb_device_id *usb_id)
3235{
86e07d34 3236 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
1da177e4 3237 int i, err;
86e07d34 3238 struct snd_usb_audio *chip;
1da177e4
LT		 3239 struct usb_host_interface *alts;
3240 int ifnum;
27d10f56 3241 u32 id;
1da177e4
LT		 3242
3243 alts = &intf->altsetting[0];
3244 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3245 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3246 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3247
3248 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3249 goto __err_val;
3250
3251 /* SB Extigy needs special boot-up sequence */
3252 /* if more models come, this will go to the quirk list. */
27d10f56 3253 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3254 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3255 goto __err_val;
1da177e4 3256 }
3a2f0856
CL		 3257 /* SB Audigy 2 NX needs its own boot-up magic, too */
3258 if (id == USB_ID(0x041e, 0x3020)) {
3259 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3260 goto __err_val;
3261 }
1da177e4
LT		 3262
3263 /*
3264 * found a config. now register to ALSA
3265 */
3266
3267 /* check whether it's already registered */
3268 chip = NULL;
3269 down(&register_mutex);
3270 for (i = 0; i < SNDRV_CARDS; i++) {
3271 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3272 if (usb_chip[i]->shutdown) {
3273 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3274 goto __error;
3275 }
3276 chip = usb_chip[i];
3277 break;
3278 }
3279 }
3280 if (! chip) {
3281 /* it's a fresh one.
3282 * now look for an empty slot and create a new card instance
3283 */
1da177e4
LT		 3284 for (i = 0; i < SNDRV_CARDS; i++)
3285 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3286 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3287 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3288 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3289 goto __error;
3290 }
1dcd3ec4 3291 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3292 break;
3293 }
3294 if (! chip) {
3295 snd_printk(KERN_ERR "no available usb audio device\n");
3296 goto __error;
3297 }
3298 }
3299
3300 err = 1; /* continue */
3301 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3302 /* need some special handlings */
3303 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3304 goto __error;
3305 }
3306
3307 if (err > 0) {
3308 /* create normal USB audio interfaces */
3309 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3310 snd_usb_create_mixer(chip, ifnum) < 0) {
3311 goto __error;
3312 }
3313 }
3314
3315 /* we are allowed to call snd_card_register() many times */
3316 if (snd_card_register(chip->card) < 0) {
3317 goto __error;
3318 }
3319
3320 usb_chip[chip->index] = chip;
3321 chip->num_interfaces++;
3322 up(&register_mutex);
3323 return chip;
3324
3325 __error:
3326 if (chip && !chip->num_interfaces)
3327 snd_card_free(chip->card);
3328 up(&register_mutex);
3329 __err_val:
3330 return NULL;
3331}
3332
3333/*
3334 * we need to take care of counter, since disconnection can be called also
3335 * many times as well as usb_audio_probe().
3336 */
3337static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3338{
86e07d34
TI		 3339 struct snd_usb_audio *chip;
3340 struct snd_card *card;
1da177e4
LT		 3341 struct list_head *p;
3342
3343 if (ptr == (void *)-1L)
3344 return;
3345
3346 chip = ptr;
3347 card = chip->card;
3348 down(&register_mutex);
3349 chip->shutdown = 1;
3350 chip->num_interfaces--;
3351 if (chip->num_interfaces <= 0) {
3352 snd_card_disconnect(card);
3353 /* release the pcm resources */
3354 list_for_each(p, &chip->pcm_list) {
ee733397 3355 snd_usb_stream_disconnect(p);
1da177e4
LT		 3356 }
3357 /* release the midi resources */
3358 list_for_each(p, &chip->midi_list) {
ee733397 3359 snd_usbmidi_disconnect(p);
1da177e4 3360 }
84957a8a
CL		 3361 /* release mixer resources */
3362 list_for_each(p, &chip->mixer_list) {
3363 snd_usb_mixer_disconnect(p);
3364 }
1da177e4
LT		 3365 usb_chip[chip->index] = NULL;
3366 up(&register_mutex);
230cd5e2 3367 snd_card_free(card);
1da177e4
LT		 3368 } else {
3369 up(&register_mutex);
3370 }
3371}
3372
3373/*
3374 * new 2.5 USB kernel API
3375 */
3376static int usb_audio_probe(struct usb_interface *intf,
3377 const struct usb_device_id *id)
3378{
3379 void *chip;
3380 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3381 if (chip) {
3382 dev_set_drvdata(&intf->dev, chip);
3383 return 0;
3384 } else
3385 return -EIO;
3386}
3387
3388static void usb_audio_disconnect(struct usb_interface *intf)
3389{
3390 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3391 dev_get_drvdata(&intf->dev));
3392}
3393
3394
3395static int __init snd_usb_audio_init(void)
3396{
3397 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3398 printk(KERN_WARNING "invalid nrpacks value.\n");
3399 return -EINVAL;
3400 }
3401 usb_register(&usb_audio_driver);
3402 return 0;
3403}
3404
3405
3406static void __exit snd_usb_audio_cleanup(void)
3407{
3408 usb_deregister(&usb_audio_driver);
3409}
3410
3411module_init(snd_usb_audio_init);
3412module_exit(snd_usb_audio_cleanup);
kernel source for telekom puls (alcatel/mediatek)