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