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[ALSA] usb-audio: fix packets per URB calculation for playback
[deliverable/linux.git] / sound / usb / usbaudio.c
CommitLineData
1da177e4
LT		 1/*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Main and PCM part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 *
28 * NOTES:
29 *
30 * - async unlink should be used for avoiding the sleep inside lock.
31 * 2.4.22 usb-uhci seems buggy for async unlinking and results in
32 * oops. in such a cse, pass async_unlink=0 option.
33 * - the linked URBs would be preferred but not used so far because of
34 * the instability of unlinking.
35 * - type II is not supported properly. there is no device which supports
36 * this type *correctly*. SB extigy looks as if it supports, but it's
37 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
38 */
39
40
41#include <sound/driver.h>
42#include <linux/bitops.h>
43#include <linux/init.h>
44#include <linux/list.h>
45#include <linux/slab.h>
46#include <linux/string.h>
47#include <linux/usb.h>
48#include <linux/moduleparam.h>
49#include <sound/core.h>
50#include <sound/info.h>
51#include <sound/pcm.h>
52#include <sound/pcm_params.h>
53#include <sound/initval.h>
54
55#include "usbaudio.h"
56
57
58MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
59MODULE_DESCRIPTION("USB Audio");
60MODULE_LICENSE("GPL");
61MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
62
63
64static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
65static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
66static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
67static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
68static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
69static int nrpacks = 4; /* max. number of packets per urb */
70static int async_unlink = 1;
71
72module_param_array(index, int, NULL, 0444);
73MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
74module_param_array(id, charp, NULL, 0444);
75MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
76module_param_array(enable, bool, NULL, 0444);
77MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
78module_param_array(vid, int, NULL, 0444);
79MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
80module_param_array(pid, int, NULL, 0444);
81MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
82module_param(nrpacks, int, 0444);
83MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
84module_param(async_unlink, bool, 0444);
85MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
86
87
88/*
89 * debug the h/w constraints
90 */
91/* #define HW_CONST_DEBUG */
92
93
94/*
95 *
96 */
97
98#define MAX_PACKS 10
99#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
15a24c07 100#define MAX_URBS 8
604cf499 101#define SYNC_URBS 4 /* always four urbs for sync */
1da177e4
LT		 102#define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
103
104typedef struct snd_usb_substream snd_usb_substream_t;
105typedef struct snd_usb_stream snd_usb_stream_t;
106typedef struct snd_urb_ctx snd_urb_ctx_t;
107
108struct audioformat {
109 struct list_head list;
110 snd_pcm_format_t format; /* format type */
111 unsigned int channels; /* # channels */
112 unsigned int fmt_type; /* USB audio format type (1-3) */
113 unsigned int frame_size; /* samples per frame for non-audio */
114 int iface; /* interface number */
115 unsigned char altsetting; /* corresponding alternate setting */
116 unsigned char altset_idx; /* array index of altenate setting */
117 unsigned char attributes; /* corresponding attributes of cs endpoint */
118 unsigned char endpoint; /* endpoint */
119 unsigned char ep_attr; /* endpoint attributes */
120 unsigned int maxpacksize; /* max. packet size */
121 unsigned int rates; /* rate bitmasks */
122 unsigned int rate_min, rate_max; /* min/max rates */
123 unsigned int nr_rates; /* number of rate table entries */
124 unsigned int *rate_table; /* rate table */
125};
126
127struct snd_urb_ctx {
128 struct urb *urb;
129 snd_usb_substream_t *subs;
130 int index; /* index for urb array */
131 int packets; /* number of packets per urb */
132 int transfer; /* transferred size */
133 char *buf; /* buffer for capture */
134};
135
136struct snd_urb_ops {
137 int (*prepare)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
138 int (*retire)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
139 int (*prepare_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
140 int (*retire_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
141};
142
143struct snd_usb_substream {
144 snd_usb_stream_t *stream;
145 struct usb_device *dev;
146 snd_pcm_substream_t *pcm_substream;
147 int direction; /* playback or capture */
148 int interface; /* current interface */
149 int endpoint; /* assigned endpoint */
150 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
151 unsigned int cur_rate; /* current rate (for hw_params callback) */
152 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
153 unsigned int format; /* USB data format */
154 unsigned int datapipe; /* the data i/o pipe */
155 unsigned int syncpipe; /* 1 - async out or adaptive in */
573567e0 156 unsigned int datainterval; /* log_2 of data packet interval */
1da177e4
LT		 157 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
158 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
159 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
160 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
161 unsigned int phase; /* phase accumulator */
162 unsigned int maxpacksize; /* max packet size in bytes */
163 unsigned int maxframesize; /* max packet size in frames */
164 unsigned int curpacksize; /* current packet size in bytes (for capture) */
165 unsigned int curframesize; /* current packet size in frames (for capture) */
166 unsigned int fill_max: 1; /* fill max packet size always */
167 unsigned int fmt_type; /* USB audio format type (1-3) */
168
169 unsigned int running: 1; /* running status */
170
171 unsigned int hwptr; /* free frame position in the buffer (only for playback) */
172 unsigned int hwptr_done; /* processed frame position in the buffer */
173 unsigned int transfer_sched; /* scheduled frames since last period (for playback) */
174 unsigned int transfer_done; /* processed frames since last period update */
175 unsigned long active_mask; /* bitmask of active urbs */
176 unsigned long unlink_mask; /* bitmask of unlinked urbs */
177
178 unsigned int nurbs; /* # urbs */
179 snd_urb_ctx_t dataurb[MAX_URBS]; /* data urb table */
180 snd_urb_ctx_t syncurb[SYNC_URBS]; /* sync urb table */
ca81090a 181 char syncbuf[SYNC_URBS * 4]; /* sync buffer; it's so small - let's get static */
1da177e4
LT		 182 char *tmpbuf; /* temporary buffer for playback */
183
184 u64 formats; /* format bitmasks (all or'ed) */
185 unsigned int num_formats; /* number of supported audio formats (list) */
186 struct list_head fmt_list; /* format list */
187 spinlock_t lock;
188
189 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
190};
191
192
193struct snd_usb_stream {
194 snd_usb_audio_t *chip;
195 snd_pcm_t *pcm;
196 int pcm_index;
197 unsigned int fmt_type; /* USB audio format type (1-3) */
198 snd_usb_substream_t substream[2];
199 struct list_head list;
200};
201
202
203/*
204 * we keep the snd_usb_audio_t instances by ourselves for merging
205 * the all interfaces on the same card as one sound device.
206 */
207
208static DECLARE_MUTEX(register_mutex);
209static snd_usb_audio_t *usb_chip[SNDRV_CARDS];
210
211
212/*
213 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
214 * this will overflow at approx 524 kHz
215 */
77933d72 216static inline unsigned get_usb_full_speed_rate(unsigned int rate)
1da177e4
LT		 217{
218 return ((rate << 13) + 62) / 125;
219}
220
221/*
222 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
223 * this will overflow at approx 4 MHz
224 */
77933d72 225static inline unsigned get_usb_high_speed_rate(unsigned int rate)
1da177e4
LT		 226{
227 return ((rate << 10) + 62) / 125;
228}
229
230/* convert our full speed USB rate into sampling rate in Hz */
77933d72 231static inline unsigned get_full_speed_hz(unsigned int usb_rate)
1da177e4
LT		 232{
233 return (usb_rate * 125 + (1 << 12)) >> 13;
234}
235
236/* convert our high speed USB rate into sampling rate in Hz */
77933d72 237static inline unsigned get_high_speed_hz(unsigned int usb_rate)
1da177e4
LT		 238{
239 return (usb_rate * 125 + (1 << 9)) >> 10;
240}
241
242
243/*
244 * prepare urb for full speed capture sync pipe
245 *
246 * fill the length and offset of each urb descriptor.
247 * the fixed 10.14 frequency is passed through the pipe.
248 */
249static int prepare_capture_sync_urb(snd_usb_substream_t *subs,
250 snd_pcm_runtime_t *runtime,
251 struct urb *urb)
252{
253 unsigned char *cp = urb->transfer_buffer;
254 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
1da177e4 255
1da177e4 256 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 257 urb->iso_frame_desc[0].length = 3;
258 urb->iso_frame_desc[0].offset = 0;
259 cp[0] = subs->freqn >> 2;
260 cp[1] = subs->freqn >> 10;
261 cp[2] = subs->freqn >> 18;
1da177e4
LT		 262 return 0;
263}
264
265/*
266 * prepare urb for high speed capture sync pipe
267 *
268 * fill the length and offset of each urb descriptor.
269 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
270 */
271static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs,
272 snd_pcm_runtime_t *runtime,
273 struct urb *urb)
274{
275 unsigned char *cp = urb->transfer_buffer;
276 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
1da177e4 277
1da177e4 278 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 279 urb->iso_frame_desc[0].length = 4;
280 urb->iso_frame_desc[0].offset = 0;
281 cp[0] = subs->freqn;
282 cp[1] = subs->freqn >> 8;
283 cp[2] = subs->freqn >> 16;
284 cp[3] = subs->freqn >> 24;
1da177e4
LT		 285 return 0;
286}
287
288/*
289 * process after capture sync complete
290 * - nothing to do
291 */
292static int retire_capture_sync_urb(snd_usb_substream_t *subs,
293 snd_pcm_runtime_t *runtime,
294 struct urb *urb)
295{
296 return 0;
297}
298
299/*
300 * prepare urb for capture data pipe
301 *
302 * fill the offset and length of each descriptor.
303 *
304 * we use a temporary buffer to write the captured data.
305 * since the length of written data is determined by host, we cannot
306 * write onto the pcm buffer directly... the data is thus copied
307 * later at complete callback to the global buffer.
308 */
309static int prepare_capture_urb(snd_usb_substream_t *subs,
310 snd_pcm_runtime_t *runtime,
311 struct urb *urb)
312{
313 int i, offs;
314 unsigned long flags;
315 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
316
317 offs = 0;
318 urb->dev = ctx->subs->dev; /* we need to set this at each time */
319 urb->number_of_packets = 0;
320 spin_lock_irqsave(&subs->lock, flags);
321 for (i = 0; i < ctx->packets; i++) {
322 urb->iso_frame_desc[i].offset = offs;
323 urb->iso_frame_desc[i].length = subs->curpacksize;
324 offs += subs->curpacksize;
325 urb->number_of_packets++;
326 subs->transfer_sched += subs->curframesize;
327 if (subs->transfer_sched >= runtime->period_size) {
328 subs->transfer_sched -= runtime->period_size;
329 break;
330 }
331 }
332 spin_unlock_irqrestore(&subs->lock, flags);
333 urb->transfer_buffer = ctx->buf;
334 urb->transfer_buffer_length = offs;
335#if 0 // for check
336 if (! urb->bandwidth) {
337 int bustime;
338 bustime = usb_check_bandwidth(urb->dev, urb);
339 if (bustime < 0)
340 return bustime;
341 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
342 usb_claim_bandwidth(urb->dev, urb, bustime, 1);
343 }
344#endif // for check
345 return 0;
346}
347
348/*
349 * process after capture complete
350 *
351 * copy the data from each desctiptor to the pcm buffer, and
352 * update the current position.
353 */
354static int retire_capture_urb(snd_usb_substream_t *subs,
355 snd_pcm_runtime_t *runtime,
356 struct urb *urb)
357{
358 unsigned long flags;
359 unsigned char *cp;
360 int i;
361 unsigned int stride, len, oldptr;
362
363 stride = runtime->frame_bits >> 3;
364
365 for (i = 0; i < urb->number_of_packets; i++) {
366 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
367 if (urb->iso_frame_desc[i].status) {
368 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
369 // continue;
370 }
371 len = urb->iso_frame_desc[i].actual_length / stride;
372 if (! len)
373 continue;
374 /* update the current pointer */
375 spin_lock_irqsave(&subs->lock, flags);
376 oldptr = subs->hwptr_done;
377 subs->hwptr_done += len;
378 if (subs->hwptr_done >= runtime->buffer_size)
379 subs->hwptr_done -= runtime->buffer_size;
380 subs->transfer_done += len;
381 spin_unlock_irqrestore(&subs->lock, flags);
382 /* copy a data chunk */
383 if (oldptr + len > runtime->buffer_size) {
384 unsigned int cnt = runtime->buffer_size - oldptr;
385 unsigned int blen = cnt * stride;
386 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
387 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
388 } else {
389 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
390 }
391 /* update the pointer, call callback if necessary */
392 spin_lock_irqsave(&subs->lock, flags);
393 if (subs->transfer_done >= runtime->period_size) {
394 subs->transfer_done -= runtime->period_size;
395 spin_unlock_irqrestore(&subs->lock, flags);
396 snd_pcm_period_elapsed(subs->pcm_substream);
397 } else
398 spin_unlock_irqrestore(&subs->lock, flags);
399 }
400 return 0;
401}
402
403
404/*
405 * prepare urb for full speed playback sync pipe
406 *
407 * set up the offset and length to receive the current frequency.
408 */
409
410static int prepare_playback_sync_urb(snd_usb_substream_t *subs,
411 snd_pcm_runtime_t *runtime,
412 struct urb *urb)
413{
1da177e4
LT		 414 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
415
1da177e4 416 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 417 urb->iso_frame_desc[0].length = 3;
418 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 419 return 0;
420}
421
422/*
423 * prepare urb for high speed playback sync pipe
424 *
425 * set up the offset and length to receive the current frequency.
426 */
427
428static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs,
429 snd_pcm_runtime_t *runtime,
430 struct urb *urb)
431{
1da177e4
LT		 432 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
433
1da177e4 434 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 435 urb->iso_frame_desc[0].length = 4;
436 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 437 return 0;
438}
439
440/*
441 * process after full speed playback sync complete
442 *
443 * retrieve the current 10.14 frequency from pipe, and set it.
444 * the value is referred in prepare_playback_urb().
445 */
446static int retire_playback_sync_urb(snd_usb_substream_t *subs,
447 snd_pcm_runtime_t *runtime,
448 struct urb *urb)
449{
ca81090a 450 unsigned int f;
1da177e4
LT		 451 unsigned long flags;
452
ca81090a
CL		 453 if (urb->iso_frame_desc[0].status == 0 &&
454 urb->iso_frame_desc[0].actual_length == 3) {
455 f = combine_triple((u8*)urb->transfer_buffer) << 2;
50cdbf15
CL		 456 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
457 spin_lock_irqsave(&subs->lock, flags);
458 subs->freqm = f;
459 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4 460 }
1da177e4
LT		 461 }
462
463 return 0;
464}
465
466/*
467 * process after high speed playback sync complete
468 *
469 * retrieve the current 12.13 frequency from pipe, and set it.
470 * the value is referred in prepare_playback_urb().
471 */
472static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs,
473 snd_pcm_runtime_t *runtime,
474 struct urb *urb)
475{
ca81090a 476 unsigned int f;
1da177e4
LT		 477 unsigned long flags;
478
ca81090a
CL		 479 if (urb->iso_frame_desc[0].status == 0 &&
480 urb->iso_frame_desc[0].actual_length == 4) {
481 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
50cdbf15
CL		 482 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
483 spin_lock_irqsave(&subs->lock, flags);
484 subs->freqm = f;
485 spin_unlock_irqrestore(&subs->lock, flags);
486 }
1da177e4
LT		 487 }
488
489 return 0;
490}
491
492/*
493 * prepare urb for playback data pipe
494 *
495 * we copy the data directly from the pcm buffer.
496 * the current position to be copied is held in hwptr field.
497 * since a urb can handle only a single linear buffer, if the total
498 * transferred area overflows the buffer boundary, we cannot send
499 * it directly from the buffer. thus the data is once copied to
500 * a temporary buffer and urb points to that.
501 */
502static int prepare_playback_urb(snd_usb_substream_t *subs,
503 snd_pcm_runtime_t *runtime,
504 struct urb *urb)
505{
506 int i, stride, offs;
507 unsigned int counts;
508 unsigned long flags;
509 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
510
511 stride = runtime->frame_bits >> 3;
512
513 offs = 0;
514 urb->dev = ctx->subs->dev; /* we need to set this at each time */
515 urb->number_of_packets = 0;
516 spin_lock_irqsave(&subs->lock, flags);
517 for (i = 0; i < ctx->packets; i++) {
518 /* calculate the size of a packet */
519 if (subs->fill_max)
520 counts = subs->maxframesize; /* fixed */
521 else {
573567e0
CL		 522 subs->phase = (subs->phase & 0xffff)
523 + (subs->freqm << subs->datainterval);
1da177e4
LT		 524 counts = subs->phase >> 16;
525 if (counts > subs->maxframesize)
526 counts = subs->maxframesize;
527 }
528 /* set up descriptor */
529 urb->iso_frame_desc[i].offset = offs * stride;
530 urb->iso_frame_desc[i].length = counts * stride;
531 offs += counts;
532 urb->number_of_packets++;
533 subs->transfer_sched += counts;
534 if (subs->transfer_sched >= runtime->period_size) {
535 subs->transfer_sched -= runtime->period_size;
536 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
537 if (subs->transfer_sched > 0) {
538 /* FIXME: fill-max mode is not supported yet */
539 offs -= subs->transfer_sched;
540 counts -= subs->transfer_sched;
541 urb->iso_frame_desc[i].length = counts * stride;
542 subs->transfer_sched = 0;
543 }
544 i++;
545 if (i < ctx->packets) {
546 /* add a transfer delimiter */
547 urb->iso_frame_desc[i].offset = offs * stride;
548 urb->iso_frame_desc[i].length = 0;
549 urb->number_of_packets++;
550 }
551 }
552 break;
553 }
554 }
555 if (subs->hwptr + offs > runtime->buffer_size) {
556 /* err, the transferred area goes over buffer boundary.
557 * copy the data to the temp buffer.
558 */
559 int len;
560 len = runtime->buffer_size - subs->hwptr;
561 urb->transfer_buffer = subs->tmpbuf;
562 memcpy(subs->tmpbuf, runtime->dma_area + subs->hwptr * stride, len * stride);
563 memcpy(subs->tmpbuf + len * stride, runtime->dma_area, (offs - len) * stride);
564 subs->hwptr += offs;
565 subs->hwptr -= runtime->buffer_size;
566 } else {
567 /* set the buffer pointer */
568 urb->transfer_buffer = runtime->dma_area + subs->hwptr * stride;
569 subs->hwptr += offs;
29b16931
CL		 570 if (subs->hwptr == runtime->buffer_size)
571 subs->hwptr = 0;
1da177e4
LT		 572 }
573 spin_unlock_irqrestore(&subs->lock, flags);
574 urb->transfer_buffer_length = offs * stride;
575 ctx->transfer = offs;
576
577 return 0;
578}
579
580/*
581 * process after playback data complete
582 *
583 * update the current position and call callback if a period is processed.
584 */
585static int retire_playback_urb(snd_usb_substream_t *subs,
586 snd_pcm_runtime_t *runtime,
587 struct urb *urb)
588{
589 unsigned long flags;
590 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
591
592 spin_lock_irqsave(&subs->lock, flags);
593 subs->transfer_done += ctx->transfer;
594 subs->hwptr_done += ctx->transfer;
595 ctx->transfer = 0;
596 if (subs->hwptr_done >= runtime->buffer_size)
597 subs->hwptr_done -= runtime->buffer_size;
598 if (subs->transfer_done >= runtime->period_size) {
599 subs->transfer_done -= runtime->period_size;
600 spin_unlock_irqrestore(&subs->lock, flags);
601 snd_pcm_period_elapsed(subs->pcm_substream);
602 } else
603 spin_unlock_irqrestore(&subs->lock, flags);
604 return 0;
605}
606
607
608/*
609 */
610static struct snd_urb_ops audio_urb_ops[2] = {
611 {
612 .prepare = prepare_playback_urb,
613 .retire = retire_playback_urb,
614 .prepare_sync = prepare_playback_sync_urb,
615 .retire_sync = retire_playback_sync_urb,
616 },
617 {
618 .prepare = prepare_capture_urb,
619 .retire = retire_capture_urb,
620 .prepare_sync = prepare_capture_sync_urb,
621 .retire_sync = retire_capture_sync_urb,
622 },
623};
624
625static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
626 {
627 .prepare = prepare_playback_urb,
628 .retire = retire_playback_urb,
629 .prepare_sync = prepare_playback_sync_urb_hs,
630 .retire_sync = retire_playback_sync_urb_hs,
631 },
632 {
633 .prepare = prepare_capture_urb,
634 .retire = retire_capture_urb,
635 .prepare_sync = prepare_capture_sync_urb_hs,
636 .retire_sync = retire_capture_sync_urb,
637 },
638};
639
640/*
641 * complete callback from data urb
642 */
643static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
644{
645 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
646 snd_usb_substream_t *subs = ctx->subs;
647 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
648 int err = 0;
649
650 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
651 ! subs->running || /* can be stopped during retire callback */
652 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
653 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
654 clear_bit(ctx->index, &subs->active_mask);
655 if (err < 0) {
656 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
657 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
658 }
659 }
660}
661
662
663/*
664 * complete callback from sync urb
665 */
666static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
667{
668 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
669 snd_usb_substream_t *subs = ctx->subs;
670 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
671 int err = 0;
672
673 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
674 ! subs->running || /* can be stopped during retire callback */
675 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
676 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
677 clear_bit(ctx->index + 16, &subs->active_mask);
678 if (err < 0) {
679 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
680 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
681 }
682 }
683}
684
685
686/*
687 * unlink active urbs.
688 */
689static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
690{
691 unsigned int i;
692 int async;
693
694 subs->running = 0;
695
696 if (!force && subs->stream->chip->shutdown) /* to be sure... */
697 return -EBADFD;
698
699 async = !can_sleep && async_unlink;
700
701 if (! async && in_interrupt())
702 return 0;
703
704 for (i = 0; i < subs->nurbs; i++) {
705 if (test_bit(i, &subs->active_mask)) {
706 if (! test_and_set_bit(i, &subs->unlink_mask)) {
707 struct urb *u = subs->dataurb[i].urb;
708 if (async) {
709 u->transfer_flags |= URB_ASYNC_UNLINK;
710 usb_unlink_urb(u);
711 } else
712 usb_kill_urb(u);
713 }
714 }
715 }
716 if (subs->syncpipe) {
717 for (i = 0; i < SYNC_URBS; i++) {
718 if (test_bit(i+16, &subs->active_mask)) {
719 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
720 struct urb *u = subs->syncurb[i].urb;
721 if (async) {
722 u->transfer_flags |= URB_ASYNC_UNLINK;
723 usb_unlink_urb(u);
724 } else
725 usb_kill_urb(u);
726 }
727 }
728 }
729 }
730 return 0;
731}
732
733
734/*
735 * set up and start data/sync urbs
736 */
737static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
738{
739 unsigned int i;
740 int err;
741
742 if (subs->stream->chip->shutdown)
743 return -EBADFD;
744
745 for (i = 0; i < subs->nurbs; i++) {
746 snd_assert(subs->dataurb[i].urb, return -EINVAL);
747 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
748 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
749 goto __error;
750 }
751 }
752 if (subs->syncpipe) {
753 for (i = 0; i < SYNC_URBS; i++) {
754 snd_assert(subs->syncurb[i].urb, return -EINVAL);
755 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
756 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
757 goto __error;
758 }
759 }
760 }
761
762 subs->active_mask = 0;
763 subs->unlink_mask = 0;
764 subs->running = 1;
765 for (i = 0; i < subs->nurbs; i++) {
766 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
767 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
768 goto __error;
769 }
770 set_bit(i, &subs->active_mask);
771 }
772 if (subs->syncpipe) {
773 for (i = 0; i < SYNC_URBS; i++) {
774 if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
775 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
776 goto __error;
777 }
778 set_bit(i + 16, &subs->active_mask);
779 }
780 }
781 return 0;
782
783 __error:
784 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
785 deactivate_urbs(subs, 0, 0);
786 return -EPIPE;
787}
788
789
790/*
791 * wait until all urbs are processed.
792 */
793static int wait_clear_urbs(snd_usb_substream_t *subs)
794{
b27c187f 795 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 796 unsigned int i;
797 int alive;
798
799 do {
800 alive = 0;
801 for (i = 0; i < subs->nurbs; i++) {
802 if (test_bit(i, &subs->active_mask))
803 alive++;
804 }
805 if (subs->syncpipe) {
806 for (i = 0; i < SYNC_URBS; i++) {
807 if (test_bit(i + 16, &subs->active_mask))
808 alive++;
809 }
810 }
811 if (! alive)
812 break;
813 set_current_state(TASK_UNINTERRUPTIBLE);
814 schedule_timeout(1);
b27c187f 815 } while (time_before(jiffies, end_time));
1da177e4
LT		 816 if (alive)
817 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
818 return 0;
819}
820
821
822/*
823 * return the current pcm pointer. just return the hwptr_done value.
824 */
825static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
826{
827 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
828 return subs->hwptr_done;
829}
830
831
832/*
833 * start/stop substream
834 */
835static int snd_usb_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
836{
837 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
838 int err;
839
840 switch (cmd) {
841 case SNDRV_PCM_TRIGGER_START:
842 err = start_urbs(subs, substream->runtime);
843 break;
844 case SNDRV_PCM_TRIGGER_STOP:
845 err = deactivate_urbs(subs, 0, 0);
846 break;
847 default:
848 err = -EINVAL;
849 break;
850 }
851 return err < 0 ? err : 0;
852}
853
854
855/*
856 * release a urb data
857 */
858static void release_urb_ctx(snd_urb_ctx_t *u)
859{
860 if (u->urb) {
861 usb_free_urb(u->urb);
862 u->urb = NULL;
863 }
4d572776
JJ		 864 kfree(u->buf);
865 u->buf = NULL;
1da177e4
LT		 866}
867
868/*
869 * release a substream
870 */
871static void release_substream_urbs(snd_usb_substream_t *subs, int force)
872{
873 int i;
874
875 /* stop urbs (to be sure) */
876 deactivate_urbs(subs, force, 1);
877 wait_clear_urbs(subs);
878
879 for (i = 0; i < MAX_URBS; i++)
880 release_urb_ctx(&subs->dataurb[i]);
881 for (i = 0; i < SYNC_URBS; i++)
882 release_urb_ctx(&subs->syncurb[i]);
4d572776
JJ		 883 kfree(subs->tmpbuf);
884 subs->tmpbuf = NULL;
1da177e4
LT		 885 subs->nurbs = 0;
886}
887
888/*
889 * initialize a substream for plaback/capture
890 */
891static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes,
892 unsigned int rate, unsigned int frame_bits)
893{
894 unsigned int maxsize, n, i;
895 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
896 unsigned int npacks[MAX_URBS], urb_packs, total_packs;
897
898 /* calculate the frequency in 16.16 format */
899 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
900 subs->freqn = get_usb_full_speed_rate(rate);
901 else
902 subs->freqn = get_usb_high_speed_rate(rate);
903 subs->freqm = subs->freqn;
573567e0
CL		 904 /* calculate max. frequency */
905 if (subs->maxpacksize) {
906 /* whatever fits into a max. size packet */
1da177e4 907 maxsize = subs->maxpacksize;
573567e0
CL		 908 subs->freqmax = (maxsize / (frame_bits >> 3))
909 << (16 - subs->datainterval);
910 } else {
911 /* no max. packet size: just take 25% higher than nominal */
912 subs->freqmax = subs->freqn + (subs->freqn >> 2);
913 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
914 >> (16 - subs->datainterval);
1da177e4 915 }
573567e0 916 subs->phase = 0;
1da177e4
LT		 917
918 if (subs->fill_max)
919 subs->curpacksize = subs->maxpacksize;
920 else
921 subs->curpacksize = maxsize;
922
15a24c07 923 if (is_playback)
1da177e4
LT		 924 urb_packs = nrpacks;
925 else
15a24c07
CL		 926 urb_packs = 1;
927 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
928 urb_packs = (urb_packs * 8) >> subs->datainterval;
1da177e4
LT		 929
930 /* allocate a temporary buffer for playback */
931 if (is_playback) {
932 subs->tmpbuf = kmalloc(maxsize * urb_packs, GFP_KERNEL);
933 if (! subs->tmpbuf) {
934 snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
935 return -ENOMEM;
936 }
937 }
938
939 /* decide how many packets to be used */
15a24c07 940 if (is_playback) {
d6db392e
CL		 941 unsigned int minsize;
942 /* determine how small a packet can be */
943 minsize = (subs->freqn >> (16 - subs->datainterval))
944 * (frame_bits >> 3);
945 /* with sync from device, assume it can be 25% lower */
946 if (subs->syncpipe)
947 minsize -= minsize >> 2;
948 minsize = max(minsize, 1u);
949 total_packs = (period_bytes + minsize - 1) / minsize;
15a24c07
CL		 950 if (total_packs < 2 * MIN_PACKS_URB)
951 total_packs = 2 * MIN_PACKS_URB;
952 } else {
953 total_packs = MAX_URBS * urb_packs;
954 }
1da177e4
LT		 955 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
956 if (subs->nurbs > MAX_URBS) {
957 /* too much... */
958 subs->nurbs = MAX_URBS;
959 total_packs = MAX_URBS * urb_packs;
960 }
961 n = total_packs;
962 for (i = 0; i < subs->nurbs; i++) {
963 npacks[i] = n > urb_packs ? urb_packs : n;
964 n -= urb_packs;
965 }
966 if (subs->nurbs <= 1) {
967 /* too little - we need at least two packets
968 * to ensure contiguous playback/capture
969 */
970 subs->nurbs = 2;
971 npacks[0] = (total_packs + 1) / 2;
972 npacks[1] = total_packs - npacks[0];
973 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB) {
974 /* the last packet is too small.. */
975 if (subs->nurbs > 2) {
976 /* merge to the first one */
977 npacks[0] += npacks[subs->nurbs - 1];
978 subs->nurbs--;
979 } else {
980 /* divide to two */
981 subs->nurbs = 2;
982 npacks[0] = (total_packs + 1) / 2;
983 npacks[1] = total_packs - npacks[0];
984 }
985 }
986
987 /* allocate and initialize data urbs */
988 for (i = 0; i < subs->nurbs; i++) {
989 snd_urb_ctx_t *u = &subs->dataurb[i];
990 u->index = i;
991 u->subs = subs;
992 u->transfer = 0;
993 u->packets = npacks[i];
994 if (subs->fmt_type == USB_FORMAT_TYPE_II)
995 u->packets++; /* for transfer delimiter */
996 if (! is_playback) {
997 /* allocate a capture buffer per urb */
998 u->buf = kmalloc(maxsize * u->packets, GFP_KERNEL);
999 if (! u->buf) {
1000 release_substream_urbs(subs, 0);
1001 return -ENOMEM;
1002 }
1003 }
1004 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
1005 if (! u->urb) {
1006 release_substream_urbs(subs, 0);
1007 return -ENOMEM;
1008 }
1009 u->urb->dev = subs->dev;
1010 u->urb->pipe = subs->datapipe;
1011 u->urb->transfer_flags = URB_ISO_ASAP;
1012 u->urb->number_of_packets = u->packets;
573567e0 1013 u->urb->interval = 1 << subs->datainterval;
1da177e4
LT		 1014 u->urb->context = u;
1015 u->urb->complete = snd_usb_complete_callback(snd_complete_urb);
1016 }
1017
1018 if (subs->syncpipe) {
1019 /* allocate and initialize sync urbs */
1020 for (i = 0; i < SYNC_URBS; i++) {
1021 snd_urb_ctx_t *u = &subs->syncurb[i];
1022 u->index = i;
1023 u->subs = subs;
ca81090a
CL		 1024 u->packets = 1;
1025 u->urb = usb_alloc_urb(1, GFP_KERNEL);
1da177e4
LT		 1026 if (! u->urb) {
1027 release_substream_urbs(subs, 0);
1028 return -ENOMEM;
1029 }
ca81090a
CL		 1030 u->urb->transfer_buffer = subs->syncbuf + i * 4;
1031 u->urb->transfer_buffer_length = 4;
1da177e4
LT		 1032 u->urb->dev = subs->dev;
1033 u->urb->pipe = subs->syncpipe;
1034 u->urb->transfer_flags = URB_ISO_ASAP;
ca81090a 1035 u->urb->number_of_packets = 1;
1149a64f 1036 u->urb->interval = 1 << subs->syncinterval;
1da177e4
LT		 1037 u->urb->context = u;
1038 u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb);
1039 }
1040 }
1041 return 0;
1042}
1043
1044
1045/*
1046 * find a matching audio format
1047 */
1048static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format,
1049 unsigned int rate, unsigned int channels)
1050{
1051 struct list_head *p;
1052 struct audioformat *found = NULL;
1053 int cur_attr = 0, attr;
1054
1055 list_for_each(p, &subs->fmt_list) {
1056 struct audioformat *fp;
1057 fp = list_entry(p, struct audioformat, list);
1058 if (fp->format != format || fp->channels != channels)
1059 continue;
1060 if (rate < fp->rate_min || rate > fp->rate_max)
1061 continue;
1062 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1063 unsigned int i;
1064 for (i = 0; i < fp->nr_rates; i++)
1065 if (fp->rate_table[i] == rate)
1066 break;
1067 if (i >= fp->nr_rates)
1068 continue;
1069 }
1070 attr = fp->ep_attr & EP_ATTR_MASK;
1071 if (! found) {
1072 found = fp;
1073 cur_attr = attr;
1074 continue;
1075 }
1076 /* avoid async out and adaptive in if the other method
1077 * supports the same format.
1078 * this is a workaround for the case like
1079 * M-audio audiophile USB.
1080 */
1081 if (attr != cur_attr) {
1082 if ((attr == EP_ATTR_ASYNC &&
1083 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1084 (attr == EP_ATTR_ADAPTIVE &&
1085 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1086 continue;
1087 if ((cur_attr == EP_ATTR_ASYNC &&
1088 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1089 (cur_attr == EP_ATTR_ADAPTIVE &&
1090 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1091 found = fp;
1092 cur_attr = attr;
1093 continue;
1094 }
1095 }
1096 /* find the format with the largest max. packet size */
1097 if (fp->maxpacksize > found->maxpacksize) {
1098 found = fp;
1099 cur_attr = attr;
1100 }
1101 }
1102 return found;
1103}
1104
1105
1106/*
1107 * initialize the picth control and sample rate
1108 */
1109static int init_usb_pitch(struct usb_device *dev, int iface,
1110 struct usb_host_interface *alts,
1111 struct audioformat *fmt)
1112{
1113 unsigned int ep;
1114 unsigned char data[1];
1115 int err;
1116
1117 ep = get_endpoint(alts, 0)->bEndpointAddress;
1118 /* if endpoint has pitch control, enable it */
1119 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1120 data[0] = 1;
1121 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1122 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1123 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1124 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1125 dev->devnum, iface, ep);
1126 return err;
1127 }
1128 }
1129 return 0;
1130}
1131
1132static int init_usb_sample_rate(struct usb_device *dev, int iface,
1133 struct usb_host_interface *alts,
1134 struct audioformat *fmt, int rate)
1135{
1136 unsigned int ep;
1137 unsigned char data[3];
1138 int err;
1139
1140 ep = get_endpoint(alts, 0)->bEndpointAddress;
1141 /* if endpoint has sampling rate control, set it */
1142 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1143 int crate;
1144 data[0] = rate;
1145 data[1] = rate >> 8;
1146 data[2] = rate >> 16;
1147 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1148 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1149 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1150 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1151 dev->devnum, iface, fmt->altsetting, rate, ep);
1152 return err;
1153 }
1154 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1155 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1156 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1157 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1158 dev->devnum, iface, fmt->altsetting, ep);
1159 return 0; /* some devices don't support reading */
1160 }
1161 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1162 if (crate != rate) {
1163 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1164 // runtime->rate = crate;
1165 }
1166 }
1167 return 0;
1168}
1169
1170/*
1171 * find a matching format and set up the interface
1172 */
1173static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
1174{
1175 struct usb_device *dev = subs->dev;
1176 struct usb_host_interface *alts;
1177 struct usb_interface_descriptor *altsd;
1178 struct usb_interface *iface;
1179 unsigned int ep, attr;
1180 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1181 int err;
1182
1183 iface = usb_ifnum_to_if(dev, fmt->iface);
1184 snd_assert(iface, return -EINVAL);
1185 alts = &iface->altsetting[fmt->altset_idx];
1186 altsd = get_iface_desc(alts);
1187 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1188
1189 if (fmt == subs->cur_audiofmt)
1190 return 0;
1191
1192 /* close the old interface */
1193 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1194 usb_set_interface(subs->dev, subs->interface, 0);
1195 subs->interface = -1;
1196 subs->format = 0;
1197 }
1198
1199 /* set interface */
1200 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1201 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1202 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1203 dev->devnum, fmt->iface, fmt->altsetting);
1204 return -EIO;
1205 }
1206 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1207 subs->interface = fmt->iface;
1208 subs->format = fmt->altset_idx;
1209 }
1210
1211 /* create a data pipe */
1212 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1213 if (is_playback)
1214 subs->datapipe = usb_sndisocpipe(dev, ep);
1215 else
1216 subs->datapipe = usb_rcvisocpipe(dev, ep);
573567e0
CL		 1217 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1218 get_endpoint(alts, 0)->bInterval >= 1 &&
1219 get_endpoint(alts, 0)->bInterval <= 4)
1220 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1221 else
1222 subs->datainterval = 0;
1da177e4
LT		 1223 subs->syncpipe = subs->syncinterval = 0;
1224 subs->maxpacksize = fmt->maxpacksize;
1225 subs->fill_max = 0;
1226
1227 /* we need a sync pipe in async OUT or adaptive IN mode */
1228 /* check the number of EP, since some devices have broken
1229 * descriptors which fool us. if it has only one EP,
1230 * assume it as adaptive-out or sync-in.
1231 */
1232 attr = fmt->ep_attr & EP_ATTR_MASK;
1233 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1234 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1235 altsd->bNumEndpoints >= 2) {
1236 /* check sync-pipe endpoint */
1237 /* ... and check descriptor size before accessing bSynchAddress
1238 because there is a version of the SB Audigy 2 NX firmware lacking
1239 the audio fields in the endpoint descriptors */
1240 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1241 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1242 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1243 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1244 dev->devnum, fmt->iface, fmt->altsetting);
1245 return -EINVAL;
1246 }
1247 ep = get_endpoint(alts, 1)->bEndpointAddress;
1248 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1249 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1250 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1251 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1252 dev->devnum, fmt->iface, fmt->altsetting);
1253 return -EINVAL;
1254 }
1255 ep &= USB_ENDPOINT_NUMBER_MASK;
1256 if (is_playback)
1257 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1258 else
1259 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1260 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1261 get_endpoint(alts, 1)->bRefresh >= 1 &&
1262 get_endpoint(alts, 1)->bRefresh <= 9)
1263 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1264 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1265 subs->syncinterval = 1;
604cf499
CL		 1266 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1267 get_endpoint(alts, 1)->bInterval <= 16)
1268 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1269 else
1270 subs->syncinterval = 3;
1da177e4
LT		 1271 }
1272
1273 /* always fill max packet size */
1274 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1275 subs->fill_max = 1;
1276
1277 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1278 return err;
1279
1280 subs->cur_audiofmt = fmt;
1281
1282#if 0
1283 printk("setting done: format = %d, rate = %d, channels = %d\n",
1284 fmt->format, fmt->rate, fmt->channels);
1285 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1286 subs->datapipe, subs->syncpipe);
1287#endif
1288
1289 return 0;
1290}
1291
1292/*
1293 * hw_params callback
1294 *
1295 * allocate a buffer and set the given audio format.
1296 *
1297 * so far we use a physically linear buffer although packetize transfer
1298 * doesn't need a continuous area.
1299 * if sg buffer is supported on the later version of alsa, we'll follow
1300 * that.
1301 */
1302static int snd_usb_hw_params(snd_pcm_substream_t *substream,
1303 snd_pcm_hw_params_t *hw_params)
1304{
1305 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1306 struct audioformat *fmt;
1307 unsigned int channels, rate, format;
1308 int ret, changed;
1309
1310 ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
1311 if (ret < 0)
1312 return ret;
1313
1314 format = params_format(hw_params);
1315 rate = params_rate(hw_params);
1316 channels = params_channels(hw_params);
1317 fmt = find_format(subs, format, rate, channels);
1318 if (! fmt) {
1319 snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
1320 snd_pcm_format_name(format), rate, channels);
1321 return -EINVAL;
1322 }
1323
1324 changed = subs->cur_audiofmt != fmt ||
1325 subs->period_bytes != params_period_bytes(hw_params) ||
1326 subs->cur_rate != rate;
1327 if ((ret = set_format(subs, fmt)) < 0)
1328 return ret;
1329
1330 if (subs->cur_rate != rate) {
1331 struct usb_host_interface *alts;
1332 struct usb_interface *iface;
1333 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1334 alts = &iface->altsetting[fmt->altset_idx];
1335 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1336 if (ret < 0)
1337 return ret;
1338 subs->cur_rate = rate;
1339 }
1340
1341 if (changed) {
1342 /* format changed */
1343 release_substream_urbs(subs, 0);
1344 /* influenced: period_bytes, channels, rate, format, */
1345 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1346 params_rate(hw_params),
1347 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1348 }
1349
1350 return ret;
1351}
1352
1353/*
1354 * hw_free callback
1355 *
1356 * reset the audio format and release the buffer
1357 */
1358static int snd_usb_hw_free(snd_pcm_substream_t *substream)
1359{
1360 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1361
1362 subs->cur_audiofmt = NULL;
1363 subs->cur_rate = 0;
1364 subs->period_bytes = 0;
1365 release_substream_urbs(subs, 0);
1366 return snd_pcm_lib_free_pages(substream);
1367}
1368
1369/*
1370 * prepare callback
1371 *
1372 * only a few subtle things...
1373 */
1374static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
1375{
1376 snd_pcm_runtime_t *runtime = substream->runtime;
1377 snd_usb_substream_t *subs = (snd_usb_substream_t *)runtime->private_data;
1378
1379 if (! subs->cur_audiofmt) {
1380 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1381 return -ENXIO;
1382 }
1383
1384 /* some unit conversions in runtime */
1385 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1386 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1387
1388 /* reset the pointer */
1389 subs->hwptr = 0;
1390 subs->hwptr_done = 0;
1391 subs->transfer_sched = 0;
1392 subs->transfer_done = 0;
1393 subs->phase = 0;
1394
1395 /* clear urbs (to be sure) */
1396 deactivate_urbs(subs, 0, 1);
1397 wait_clear_urbs(subs);
1398
1399 return 0;
1400}
1401
1402static snd_pcm_hardware_t snd_usb_playback =
1403{
1404 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1405 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1406 SNDRV_PCM_INFO_MMAP_VALID),
1407 .buffer_bytes_max = (128*1024),
1408 .period_bytes_min = 64,
1409 .period_bytes_max = (128*1024),
1410 .periods_min = 2,
1411 .periods_max = 1024,
1412};
1413
1414static snd_pcm_hardware_t snd_usb_capture =
1415{
1416 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1417 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1418 SNDRV_PCM_INFO_MMAP_VALID),
1419 .buffer_bytes_max = (128*1024),
1420 .period_bytes_min = 64,
1421 .period_bytes_max = (128*1024),
1422 .periods_min = 2,
1423 .periods_max = 1024,
1424};
1425
1426/*
1427 * h/w constraints
1428 */
1429
1430#ifdef HW_CONST_DEBUG
1431#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1432#else
1433#define hwc_debug(fmt, args...) /**/
1434#endif
1435
1436static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp)
1437{
1438 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1439 snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1440 snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1441
1442 /* check the format */
1443 if (! snd_mask_test(fmts, fp->format)) {
1444 hwc_debug(" > check: no supported format %d\n", fp->format);
1445 return 0;
1446 }
1447 /* check the channels */
1448 if (fp->channels < ct->min || fp->channels > ct->max) {
1449 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1450 return 0;
1451 }
1452 /* check the rate is within the range */
1453 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1454 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1455 return 0;
1456 }
1457 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1458 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1459 return 0;
1460 }
1461 return 1;
1462}
1463
1464static int hw_rule_rate(snd_pcm_hw_params_t *params,
1465 snd_pcm_hw_rule_t *rule)
1466{
1467 snd_usb_substream_t *subs = rule->private;
1468 struct list_head *p;
1469 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1470 unsigned int rmin, rmax;
1471 int changed;
1472
1473 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1474 changed = 0;
1475 rmin = rmax = 0;
1476 list_for_each(p, &subs->fmt_list) {
1477 struct audioformat *fp;
1478 fp = list_entry(p, struct audioformat, list);
1479 if (! hw_check_valid_format(params, fp))
1480 continue;
1481 if (changed++) {
1482 if (rmin > fp->rate_min)
1483 rmin = fp->rate_min;
1484 if (rmax < fp->rate_max)
1485 rmax = fp->rate_max;
1486 } else {
1487 rmin = fp->rate_min;
1488 rmax = fp->rate_max;
1489 }
1490 }
1491
1492 if (! changed) {
1493 hwc_debug(" --> get empty\n");
1494 it->empty = 1;
1495 return -EINVAL;
1496 }
1497
1498 changed = 0;
1499 if (it->min < rmin) {
1500 it->min = rmin;
1501 it->openmin = 0;
1502 changed = 1;
1503 }
1504 if (it->max > rmax) {
1505 it->max = rmax;
1506 it->openmax = 0;
1507 changed = 1;
1508 }
1509 if (snd_interval_checkempty(it)) {
1510 it->empty = 1;
1511 return -EINVAL;
1512 }
1513 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1514 return changed;
1515}
1516
1517
1518static int hw_rule_channels(snd_pcm_hw_params_t *params,
1519 snd_pcm_hw_rule_t *rule)
1520{
1521 snd_usb_substream_t *subs = rule->private;
1522 struct list_head *p;
1523 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1524 unsigned int rmin, rmax;
1525 int changed;
1526
1527 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1528 changed = 0;
1529 rmin = rmax = 0;
1530 list_for_each(p, &subs->fmt_list) {
1531 struct audioformat *fp;
1532 fp = list_entry(p, struct audioformat, list);
1533 if (! hw_check_valid_format(params, fp))
1534 continue;
1535 if (changed++) {
1536 if (rmin > fp->channels)
1537 rmin = fp->channels;
1538 if (rmax < fp->channels)
1539 rmax = fp->channels;
1540 } else {
1541 rmin = fp->channels;
1542 rmax = fp->channels;
1543 }
1544 }
1545
1546 if (! changed) {
1547 hwc_debug(" --> get empty\n");
1548 it->empty = 1;
1549 return -EINVAL;
1550 }
1551
1552 changed = 0;
1553 if (it->min < rmin) {
1554 it->min = rmin;
1555 it->openmin = 0;
1556 changed = 1;
1557 }
1558 if (it->max > rmax) {
1559 it->max = rmax;
1560 it->openmax = 0;
1561 changed = 1;
1562 }
1563 if (snd_interval_checkempty(it)) {
1564 it->empty = 1;
1565 return -EINVAL;
1566 }
1567 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1568 return changed;
1569}
1570
1571static int hw_rule_format(snd_pcm_hw_params_t *params,
1572 snd_pcm_hw_rule_t *rule)
1573{
1574 snd_usb_substream_t *subs = rule->private;
1575 struct list_head *p;
1576 snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1577 u64 fbits;
1578 u32 oldbits[2];
1579 int changed;
1580
1581 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1582 fbits = 0;
1583 list_for_each(p, &subs->fmt_list) {
1584 struct audioformat *fp;
1585 fp = list_entry(p, struct audioformat, list);
1586 if (! hw_check_valid_format(params, fp))
1587 continue;
1588 fbits |= (1ULL << fp->format);
1589 }
1590
1591 oldbits[0] = fmt->bits[0];
1592 oldbits[1] = fmt->bits[1];
1593 fmt->bits[0] &= (u32)fbits;
1594 fmt->bits[1] &= (u32)(fbits >> 32);
1595 if (! fmt->bits[0] && ! fmt->bits[1]) {
1596 hwc_debug(" --> get empty\n");
1597 return -EINVAL;
1598 }
1599 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1600 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1601 return changed;
1602}
1603
1604#define MAX_MASK 64
1605
1606/*
1607 * check whether the registered audio formats need special hw-constraints
1608 */
1609static int check_hw_params_convention(snd_usb_substream_t *subs)
1610{
1611 int i;
1612 u32 *channels;
1613 u32 *rates;
1614 u32 cmaster, rmaster;
1615 u32 rate_min = 0, rate_max = 0;
1616 struct list_head *p;
1617 int err = 1;
1618
1619 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1620 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1621
1622 list_for_each(p, &subs->fmt_list) {
1623 struct audioformat *f;
1624 f = list_entry(p, struct audioformat, list);
1625 /* unconventional channels? */
1626 if (f->channels > 32)
1627 goto __out;
1628 /* continuous rate min/max matches? */
1629 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1630 if (rate_min && f->rate_min != rate_min)
1631 goto __out;
1632 if (rate_max && f->rate_max != rate_max)
1633 goto __out;
1634 rate_min = f->rate_min;
1635 rate_max = f->rate_max;
1636 }
1637 /* combination of continuous rates and fixed rates? */
1638 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1639 if (f->rates != rates[f->format])
1640 goto __out;
1641 }
1642 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1643 if (rates[f->format] && rates[f->format] != f->rates)
1644 goto __out;
1645 }
1646 channels[f->format] |= (1 << f->channels);
1647 rates[f->format] |= f->rates;
1648 }
1649 /* check whether channels and rates match for all formats */
1650 cmaster = rmaster = 0;
1651 for (i = 0; i < MAX_MASK; i++) {
1652 if (cmaster != channels[i] && cmaster && channels[i])
1653 goto __out;
1654 if (rmaster != rates[i] && rmaster && rates[i])
1655 goto __out;
1656 if (channels[i])
1657 cmaster = channels[i];
1658 if (rates[i])
1659 rmaster = rates[i];
1660 }
1661 /* check whether channels match for all distinct rates */
1662 memset(channels, 0, MAX_MASK * sizeof(u32));
1663 list_for_each(p, &subs->fmt_list) {
1664 struct audioformat *f;
1665 f = list_entry(p, struct audioformat, list);
1666 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1667 continue;
1668 for (i = 0; i < 32; i++) {
1669 if (f->rates & (1 << i))
1670 channels[i] |= (1 << f->channels);
1671 }
1672 }
1673 cmaster = 0;
1674 for (i = 0; i < 32; i++) {
1675 if (cmaster != channels[i] && cmaster && channels[i])
1676 goto __out;
1677 if (channels[i])
1678 cmaster = channels[i];
1679 }
1680 err = 0;
1681
1682 __out:
1683 kfree(channels);
1684 kfree(rates);
1685 return err;
1686}
1687
1688
1689/*
1690 * set up the runtime hardware information.
1691 */
1692
1693static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
1694{
1695 struct list_head *p;
1696 int err;
1697
1698 runtime->hw.formats = subs->formats;
1699
1700 runtime->hw.rate_min = 0x7fffffff;
1701 runtime->hw.rate_max = 0;
1702 runtime->hw.channels_min = 256;
1703 runtime->hw.channels_max = 0;
1704 runtime->hw.rates = 0;
1705 /* check min/max rates and channels */
1706 list_for_each(p, &subs->fmt_list) {
1707 struct audioformat *fp;
1708 fp = list_entry(p, struct audioformat, list);
1709 runtime->hw.rates |= fp->rates;
1710 if (runtime->hw.rate_min > fp->rate_min)
1711 runtime->hw.rate_min = fp->rate_min;
1712 if (runtime->hw.rate_max < fp->rate_max)
1713 runtime->hw.rate_max = fp->rate_max;
1714 if (runtime->hw.channels_min > fp->channels)
1715 runtime->hw.channels_min = fp->channels;
1716 if (runtime->hw.channels_max < fp->channels)
1717 runtime->hw.channels_max = fp->channels;
1718 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1719 /* FIXME: there might be more than one audio formats... */
1720 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1721 fp->frame_size;
1722 }
1723 }
1724
1725 /* set the period time minimum 1ms */
1726 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1727 1000 * MIN_PACKS_URB,
1728 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1729
1730 if (check_hw_params_convention(subs)) {
1731 hwc_debug("setting extra hw constraints...\n");
1732 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1733 hw_rule_rate, subs,
1734 SNDRV_PCM_HW_PARAM_FORMAT,
1735 SNDRV_PCM_HW_PARAM_CHANNELS,
1736 -1)) < 0)
1737 return err;
1738 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1739 hw_rule_channels, subs,
1740 SNDRV_PCM_HW_PARAM_FORMAT,
1741 SNDRV_PCM_HW_PARAM_RATE,
1742 -1)) < 0)
1743 return err;
1744 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1745 hw_rule_format, subs,
1746 SNDRV_PCM_HW_PARAM_RATE,
1747 SNDRV_PCM_HW_PARAM_CHANNELS,
1748 -1)) < 0)
1749 return err;
1750 }
1751 return 0;
1752}
1753
1754static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
1755 snd_pcm_hardware_t *hw)
1756{
1757 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1758 snd_pcm_runtime_t *runtime = substream->runtime;
1759 snd_usb_substream_t *subs = &as->substream[direction];
1760
1761 subs->interface = -1;
1762 subs->format = 0;
1763 runtime->hw = *hw;
1764 runtime->private_data = subs;
1765 subs->pcm_substream = substream;
1766 return setup_hw_info(runtime, subs);
1767}
1768
1769static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
1770{
1771 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1772 snd_usb_substream_t *subs = &as->substream[direction];
1773
1774 if (subs->interface >= 0) {
1775 usb_set_interface(subs->dev, subs->interface, 0);
1776 subs->interface = -1;
1777 }
1778 subs->pcm_substream = NULL;
1779 return 0;
1780}
1781
1782static int snd_usb_playback_open(snd_pcm_substream_t *substream)
1783{
1784 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1785}
1786
1787static int snd_usb_playback_close(snd_pcm_substream_t *substream)
1788{
1789 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1790}
1791
1792static int snd_usb_capture_open(snd_pcm_substream_t *substream)
1793{
1794 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1795}
1796
1797static int snd_usb_capture_close(snd_pcm_substream_t *substream)
1798{
1799 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1800}
1801
1802static snd_pcm_ops_t snd_usb_playback_ops = {
1803 .open = snd_usb_playback_open,
1804 .close = snd_usb_playback_close,
1805 .ioctl = snd_pcm_lib_ioctl,
1806 .hw_params = snd_usb_hw_params,
1807 .hw_free = snd_usb_hw_free,
1808 .prepare = snd_usb_pcm_prepare,
1809 .trigger = snd_usb_pcm_trigger,
1810 .pointer = snd_usb_pcm_pointer,
1811};
1812
1813static snd_pcm_ops_t snd_usb_capture_ops = {
1814 .open = snd_usb_capture_open,
1815 .close = snd_usb_capture_close,
1816 .ioctl = snd_pcm_lib_ioctl,
1817 .hw_params = snd_usb_hw_params,
1818 .hw_free = snd_usb_hw_free,
1819 .prepare = snd_usb_pcm_prepare,
1820 .trigger = snd_usb_pcm_trigger,
1821 .pointer = snd_usb_pcm_pointer,
1822};
1823
1824
1825
1826/*
1827 * helper functions
1828 */
1829
1830/*
1831 * combine bytes and get an integer value
1832 */
1833unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1834{
1835 switch (size) {
1836 case 1: return *bytes;
1837 case 2: return combine_word(bytes);
1838 case 3: return combine_triple(bytes);
1839 case 4: return combine_quad(bytes);
1840 default: return 0;
1841 }
1842}
1843
1844/*
1845 * parse descriptor buffer and return the pointer starting the given
1846 * descriptor type.
1847 */
1848void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1849{
1850 u8 *p, *end, *next;
1851
1852 p = descstart;
1853 end = p + desclen;
1854 for (; p < end;) {
1855 if (p[0] < 2)
1856 return NULL;
1857 next = p + p[0];
1858 if (next > end)
1859 return NULL;
1860 if (p[1] == dtype && (!after || (void *)p > after)) {
1861 return p;
1862 }
1863 p = next;
1864 }
1865 return NULL;
1866}
1867
1868/*
1869 * find a class-specified interface descriptor with the given subtype.
1870 */
1871void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1872{
1873 unsigned char *p = after;
1874
1875 while ((p = snd_usb_find_desc(buffer, buflen, p,
1876 USB_DT_CS_INTERFACE)) != NULL) {
1877 if (p[0] >= 3 && p[2] == dsubtype)
1878 return p;
1879 }
1880 return NULL;
1881}
1882
1883/*
1884 * Wrapper for usb_control_msg().
1885 * Allocates a temp buffer to prevent dmaing from/to the stack.
1886 */
1887int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1888 __u8 requesttype, __u16 value, __u16 index, void *data,
1889 __u16 size, int timeout)
1890{
1891 int err;
1892 void *buf = NULL;
1893
1894 if (size > 0) {
1895 buf = kmalloc(size, GFP_KERNEL);
1896 if (!buf)
1897 return -ENOMEM;
1898 memcpy(buf, data, size);
1899 }
1900 err = usb_control_msg(dev, pipe, request, requesttype,
1901 value, index, buf, size, timeout);
1902 if (size > 0) {
1903 memcpy(data, buf, size);
1904 kfree(buf);
1905 }
1906 return err;
1907}
1908
1909
1910/*
1911 * entry point for linux usb interface
1912 */
1913
1914static int usb_audio_probe(struct usb_interface *intf,
1915 const struct usb_device_id *id);
1916static void usb_audio_disconnect(struct usb_interface *intf);
1917
1918static struct usb_device_id usb_audio_ids [] = {
1919#include "usbquirks.h"
1920 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1921 .bInterfaceClass = USB_CLASS_AUDIO,
1922 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
1923 { } /* Terminating entry */
1924};
1925
1926MODULE_DEVICE_TABLE (usb, usb_audio_ids);
1927
1928static struct usb_driver usb_audio_driver = {
1929 .owner = THIS_MODULE,
1930 .name = "snd-usb-audio",
1931 .probe = usb_audio_probe,
1932 .disconnect = usb_audio_disconnect,
1933 .id_table = usb_audio_ids,
1934};
1935
1936
1937/*
1938 * proc interface for list the supported pcm formats
1939 */
1940static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
1941{
1942 struct list_head *p;
1943 static char *sync_types[4] = {
1944 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
1945 };
1946
1947 list_for_each(p, &subs->fmt_list) {
1948 struct audioformat *fp;
1949 fp = list_entry(p, struct audioformat, list);
1950 snd_iprintf(buffer, " Interface %d\n", fp->iface);
1951 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
1952 snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
1953 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
1954 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
1955 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
1956 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
1957 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
1958 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1959 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
1960 fp->rate_min, fp->rate_max);
1961 } else {
1962 unsigned int i;
1963 snd_iprintf(buffer, " Rates: ");
1964 for (i = 0; i < fp->nr_rates; i++) {
1965 if (i > 0)
1966 snd_iprintf(buffer, ", ");
1967 snd_iprintf(buffer, "%d", fp->rate_table[i]);
1968 }
1969 snd_iprintf(buffer, "\n");
1970 }
1971 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
1972 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
1973 }
1974}
1975
1976static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
1977{
1978 if (subs->running) {
1979 unsigned int i;
1980 snd_iprintf(buffer, " Status: Running\n");
1981 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
1982 snd_iprintf(buffer, " Altset = %d\n", subs->format);
1983 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
1984 for (i = 0; i < subs->nurbs; i++)
1985 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
1986 snd_iprintf(buffer, "]\n");
1987 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 1988 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 1989 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
1990 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 1991 : get_high_speed_hz(subs->freqm),
1992 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 1993 } else {
1994 snd_iprintf(buffer, " Status: Stop\n");
1995 }
1996}
1997
1998static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
1999{
2000 snd_usb_stream_t *stream = entry->private_data;
2001
2002 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2003
2004 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2005 snd_iprintf(buffer, "\nPlayback:\n");
2006 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2007 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2008 }
2009 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2010 snd_iprintf(buffer, "\nCapture:\n");
2011 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2012 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2013 }
2014}
2015
2016static void proc_pcm_format_add(snd_usb_stream_t *stream)
2017{
2018 snd_info_entry_t *entry;
2019 char name[32];
2020 snd_card_t *card = stream->chip->card;
2021
2022 sprintf(name, "stream%d", stream->pcm_index);
2023 if (! snd_card_proc_new(card, name, &entry))
2024 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2025}
2026
2027
2028/*
2029 * initialize the substream instance.
2030 */
2031
2032static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp)
2033{
2034 snd_usb_substream_t *subs = &as->substream[stream];
2035
2036 INIT_LIST_HEAD(&subs->fmt_list);
2037 spin_lock_init(&subs->lock);
2038
2039 subs->stream = as;
2040 subs->direction = stream;
2041 subs->dev = as->chip->dev;
2042 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2043 subs->ops = audio_urb_ops[stream];
2044 else
2045 subs->ops = audio_urb_ops_high_speed[stream];
2046 snd_pcm_lib_preallocate_pages(as->pcm->streams[stream].substream,
2047 SNDRV_DMA_TYPE_CONTINUOUS,
2048 snd_dma_continuous_data(GFP_KERNEL),
2049 64 * 1024, 128 * 1024);
2050 snd_pcm_set_ops(as->pcm, stream,
2051 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2052 &snd_usb_playback_ops : &snd_usb_capture_ops);
2053
2054 list_add_tail(&fp->list, &subs->fmt_list);
2055 subs->formats |= 1ULL << fp->format;
2056 subs->endpoint = fp->endpoint;
2057 subs->num_formats++;
2058 subs->fmt_type = fp->fmt_type;
2059}
2060
2061
2062/*
2063 * free a substream
2064 */
2065static void free_substream(snd_usb_substream_t *subs)
2066{
2067 struct list_head *p, *n;
2068
2069 if (! subs->num_formats)
2070 return; /* not initialized */
2071 list_for_each_safe(p, n, &subs->fmt_list) {
2072 struct audioformat *fp = list_entry(p, struct audioformat, list);
2073 kfree(fp->rate_table);
2074 kfree(fp);
2075 }
2076}
2077
2078
2079/*
2080 * free a usb stream instance
2081 */
2082static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
2083{
2084 free_substream(&stream->substream[0]);
2085 free_substream(&stream->substream[1]);
2086 list_del(&stream->list);
2087 kfree(stream);
2088}
2089
2090static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
2091{
2092 snd_usb_stream_t *stream = pcm->private_data;
2093 if (stream) {
2094 stream->pcm = NULL;
2095 snd_pcm_lib_preallocate_free_for_all(pcm);
2096 snd_usb_audio_stream_free(stream);
2097 }
2098}
2099
2100
2101/*
2102 * add this endpoint to the chip instance.
2103 * if a stream with the same endpoint already exists, append to it.
2104 * if not, create a new pcm stream.
2105 */
2106static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp)
2107{
2108 struct list_head *p;
2109 snd_usb_stream_t *as;
2110 snd_usb_substream_t *subs;
2111 snd_pcm_t *pcm;
2112 int err;
2113
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 if (subs->endpoint == fp->endpoint) {
2122 list_add_tail(&fp->list, &subs->fmt_list);
2123 subs->num_formats++;
2124 subs->formats |= 1ULL << fp->format;
2125 return 0;
2126 }
2127 }
2128 /* look for an empty stream */
2129 list_for_each(p, &chip->pcm_list) {
2130 as = list_entry(p, snd_usb_stream_t, list);
2131 if (as->fmt_type != fp->fmt_type)
2132 continue;
2133 subs = &as->substream[stream];
2134 if (subs->endpoint)
2135 continue;
2136 err = snd_pcm_new_stream(as->pcm, stream, 1);
2137 if (err < 0)
2138 return err;
2139 init_substream(as, stream, fp);
2140 return 0;
2141 }
2142
2143 /* create a new pcm */
2144 as = kmalloc(sizeof(*as), GFP_KERNEL);
2145 if (! as)
2146 return -ENOMEM;
2147 memset(as, 0, sizeof(*as));
2148 as->pcm_index = chip->pcm_devs;
2149 as->chip = chip;
2150 as->fmt_type = fp->fmt_type;
2151 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2152 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2153 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2154 &pcm);
2155 if (err < 0) {
2156 kfree(as);
2157 return err;
2158 }
2159 as->pcm = pcm;
2160 pcm->private_data = as;
2161 pcm->private_free = snd_usb_audio_pcm_free;
2162 pcm->info_flags = 0;
2163 if (chip->pcm_devs > 0)
2164 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2165 else
2166 strcpy(pcm->name, "USB Audio");
2167
2168 init_substream(as, stream, fp);
2169
2170 list_add(&as->list, &chip->pcm_list);
2171 chip->pcm_devs++;
2172
2173 proc_pcm_format_add(as);
2174
2175 return 0;
2176}
2177
2178
2179/*
2180 * check if the device uses big-endian samples
2181 */
27d10f56 2182static int is_big_endian_format(snd_usb_audio_t *chip, struct audioformat *fp)
1da177e4 2183{
27d10f56
CL		 2184 switch (chip->usb_id) {
2185 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2186 if (fp->endpoint & USB_DIR_IN)
1da177e4 2187 return 1;
27d10f56
CL		 2188 break;
2189 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2190 return 1;
1da177e4
LT		 2191 }
2192 return 0;
2193}
2194
2195/*
2196 * parse the audio format type I descriptor
2197 * and returns the corresponding pcm format
2198 *
2199 * @dev: usb device
2200 * @fp: audioformat record
2201 * @format: the format tag (wFormatTag)
2202 * @fmt: the format type descriptor
2203 */
27d10f56 2204static int parse_audio_format_i_type(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2205 int format, unsigned char *fmt)
2206{
2207 int pcm_format;
2208 int sample_width, sample_bytes;
2209
2210 /* FIXME: correct endianess and sign? */
2211 pcm_format = -1;
2212 sample_width = fmt[6];
2213 sample_bytes = fmt[5];
2214 switch (format) {
2215 case 0: /* some devices don't define this correctly... */
2216 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2217 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2218 /* fall-through */
2219 case USB_AUDIO_FORMAT_PCM:
2220 if (sample_width > sample_bytes * 8) {
2221 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2222 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2223 sample_width, sample_bytes);
2224 }
2225 /* check the format byte size */
2226 switch (fmt[5]) {
2227 case 1:
2228 pcm_format = SNDRV_PCM_FORMAT_S8;
2229 break;
2230 case 2:
27d10f56 2231 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2232 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2233 else
2234 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2235 break;
2236 case 3:
27d10f56 2237 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2238 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2239 else
2240 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2241 break;
2242 case 4:
2243 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2244 break;
2245 default:
2246 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2247 chip->dev->devnum, fp->iface,
2248 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2249 break;
2250 }
2251 break;
2252 case USB_AUDIO_FORMAT_PCM8:
2253 /* Dallas DS4201 workaround */
27d10f56 2254 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4
LT		 2255 pcm_format = SNDRV_PCM_FORMAT_S8;
2256 else
2257 pcm_format = SNDRV_PCM_FORMAT_U8;
2258 break;
2259 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2260 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2261 break;
2262 case USB_AUDIO_FORMAT_ALAW:
2263 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2264 break;
2265 case USB_AUDIO_FORMAT_MU_LAW:
2266 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2267 break;
2268 default:
2269 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2270 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2271 break;
2272 }
2273 return pcm_format;
2274}
2275
2276
2277/*
2278 * parse the format descriptor and stores the possible sample rates
2279 * on the audioformat table.
2280 *
2281 * @dev: usb device
2282 * @fp: audioformat record
2283 * @fmt: the format descriptor
2284 * @offset: the start offset of descriptor pointing the rate type
2285 * (7 for type I and II, 8 for type II)
2286 */
27d10f56 2287static int parse_audio_format_rates(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2288 unsigned char *fmt, int offset)
2289{
2290 int nr_rates = fmt[offset];
2291 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2292 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2293 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2294 return -1;
2295 }
2296
2297 if (nr_rates) {
2298 /*
2299 * build the rate table and bitmap flags
2300 */
2301 int r, idx, c;
2302 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2303 static unsigned int conv_rates[] = {
2304 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2305 64000, 88200, 96000, 176400, 192000
2306 };
2307 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2308 if (fp->rate_table == NULL) {
2309 snd_printk(KERN_ERR "cannot malloc\n");
2310 return -1;
2311 }
2312
2313 fp->nr_rates = nr_rates;
2314 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2315 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2316 unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2317 if (rate < fp->rate_min)
2318 fp->rate_min = rate;
2319 else if (rate > fp->rate_max)
2320 fp->rate_max = rate;
2321 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2322 if (rate == conv_rates[c]) {
2323 fp->rates |= (1 << c);
2324 break;
2325 }
2326 }
2327 }
2328 } else {
2329 /* continuous rates */
2330 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2331 fp->rate_min = combine_triple(&fmt[offset + 1]);
2332 fp->rate_max = combine_triple(&fmt[offset + 4]);
2333 }
2334 return 0;
2335}
2336
2337/*
2338 * parse the format type I and III descriptors
2339 */
27d10f56 2340static int parse_audio_format_i(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2341 int format, unsigned char *fmt)
2342{
2343 int pcm_format;
2344
2345 if (fmt[3] == USB_FORMAT_TYPE_III) {
2346 /* FIXME: the format type is really IECxxx
2347 * but we give normal PCM format to get the existing
2348 * apps working...
2349 */
2350 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2351 } else {
27d10f56 2352 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2353 if (pcm_format < 0)
2354 return -1;
2355 }
2356 fp->format = pcm_format;
2357 fp->channels = fmt[4];
2358 if (fp->channels < 1) {
2359 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2360 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2361 return -1;
2362 }
27d10f56 2363 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2364}
2365
2366/*
2367 * prase the format type II descriptor
2368 */
27d10f56 2369static int parse_audio_format_ii(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2370 int format, unsigned char *fmt)
2371{
2372 int brate, framesize;
2373 switch (format) {
2374 case USB_AUDIO_FORMAT_AC3:
2375 /* FIXME: there is no AC3 format defined yet */
2376 // fp->format = SNDRV_PCM_FORMAT_AC3;
2377 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2378 break;
2379 case USB_AUDIO_FORMAT_MPEG:
2380 fp->format = SNDRV_PCM_FORMAT_MPEG;
2381 break;
2382 default:
2383 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
27d10f56 2384 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2385 fp->format = SNDRV_PCM_FORMAT_MPEG;
2386 break;
2387 }
2388 fp->channels = 1;
2389 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2390 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2391 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2392 fp->frame_size = framesize;
27d10f56 2393 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2394}
2395
27d10f56 2396static int parse_audio_format(snd_usb_audio_t *chip, struct audioformat *fp,
1da177e4
LT		 2397 int format, unsigned char *fmt, int stream)
2398{
2399 int err;
2400
2401 switch (fmt[3]) {
2402 case USB_FORMAT_TYPE_I:
2403 case USB_FORMAT_TYPE_III:
27d10f56 2404 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2405 break;
2406 case USB_FORMAT_TYPE_II:
27d10f56 2407 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2408 break;
2409 default:
2410 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2411 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2412 return -1;
2413 }
2414 fp->fmt_type = fmt[3];
2415 if (err < 0)
2416 return err;
2417#if 1
8c1872dc 2418 /* FIXME: temporary hack for extigy/audigy 2 nx */
1da177e4
LT		 2419 /* extigy apparently supports sample rates other than 48k
2420 * but not in ordinary way. so we enable only 48k atm.
2421 */
27d10f56
CL		 2422 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2423 chip->usb_id == USB_ID(0x041e, 0x3020)) {
1da177e4 2424 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2425 fp->rates != SNDRV_PCM_RATE_48000 &&
2426 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2427 return -1;
1da177e4
LT		 2428 }
2429#endif
2430 return 0;
2431}
2432
2433static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
2434{
2435 struct usb_device *dev;
2436 struct usb_interface *iface;
2437 struct usb_host_interface *alts;
2438 struct usb_interface_descriptor *altsd;
2439 int i, altno, err, stream;
2440 int format;
2441 struct audioformat *fp;
2442 unsigned char *fmt, *csep;
2443
2444 dev = chip->dev;
2445
2446 /* parse the interface's altsettings */
2447 iface = usb_ifnum_to_if(dev, iface_no);
2448 for (i = 0; i < iface->num_altsetting; i++) {
2449 alts = &iface->altsetting[i];
2450 altsd = get_iface_desc(alts);
2451 /* skip invalid one */
2452 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2453 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2454 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2455 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2456 altsd->bNumEndpoints < 1 ||
2457 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2458 continue;
2459 /* must be isochronous */
2460 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2461 USB_ENDPOINT_XFER_ISOC)
2462 continue;
2463 /* check direction */
2464 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2465 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2466 altno = altsd->bAlternateSetting;
2467
2468 /* get audio formats */
2469 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2470 if (!fmt) {
2471 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2472 dev->devnum, iface_no, altno);
2473 continue;
2474 }
2475
2476 if (fmt[0] < 7) {
2477 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2478 dev->devnum, iface_no, altno);
2479 continue;
2480 }
2481
2482 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2483
2484 /* get format type */
2485 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2486 if (!fmt) {
2487 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2488 dev->devnum, iface_no, altno);
2489 continue;
2490 }
2491 if (fmt[0] < 8) {
2492 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2493 dev->devnum, iface_no, altno);
2494 continue;
2495 }
2496
2497 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2498 /* Creamware Noah has this descriptor after the 2nd endpoint */
2499 if (!csep && altsd->bNumEndpoints >= 2)
2500 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2501 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2502 snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2503 dev->devnum, iface_no, altno);
2504 continue;
2505 }
2506
2507 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2508 if (! fp) {
2509 snd_printk(KERN_ERR "cannot malloc\n");
2510 return -ENOMEM;
2511 }
2512
2513 memset(fp, 0, sizeof(*fp));
2514 fp->iface = iface_no;
2515 fp->altsetting = altno;
2516 fp->altset_idx = i;
2517 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2518 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
1da177e4 2519 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2520 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2521 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2522 * (fp->maxpacksize & 0x7ff);
1da177e4
LT		 2523 fp->attributes = csep[3];
2524
2525 /* some quirks for attributes here */
2526
c3f93297
CL		 2527 switch (chip->usb_id) {
2528 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2529 /* Optoplay sets the sample rate attribute although
2530 * it seems not supporting it in fact.
2531 */
2532 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2533 break;
2534 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2535 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2536 /* doesn't set the sample rate attribute, but supports it */
2537 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2538 break;
2539 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2540 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2541 an older model 77d:223) */
1da177e4
LT		 2542 /*
2543 * plantronics headset and Griffin iMic have set adaptive-in
2544 * although it's really not...
2545 */
1da177e4
LT		 2546 fp->ep_attr &= ~EP_ATTR_MASK;
2547 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2548 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2549 else
2550 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2551 break;
1da177e4
LT		 2552 }
2553
2554 /* ok, let's parse further... */
27d10f56 2555 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2556 kfree(fp->rate_table);
2557 kfree(fp);
2558 continue;
2559 }
2560
2561 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2562 err = add_audio_endpoint(chip, stream, fp);
2563 if (err < 0) {
2564 kfree(fp->rate_table);
2565 kfree(fp);
2566 return err;
2567 }
2568 /* try to set the interface... */
2569 usb_set_interface(chip->dev, iface_no, altno);
2570 init_usb_pitch(chip->dev, iface_no, alts, fp);
2571 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2572 }
2573 return 0;
2574}
2575
2576
2577/*
2578 * disconnect streams
2579 * called from snd_usb_audio_disconnect()
2580 */
ee733397 2581static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2582{
2583 int idx;
2584 snd_usb_stream_t *as;
2585 snd_usb_substream_t *subs;
2586
2587 as = list_entry(head, snd_usb_stream_t, list);
2588 for (idx = 0; idx < 2; idx++) {
2589 subs = &as->substream[idx];
2590 if (!subs->num_formats)
2591 return;
2592 release_substream_urbs(subs, 1);
2593 subs->interface = -1;
2594 }
2595}
2596
2597/*
2598 * parse audio control descriptor and create pcm/midi streams
2599 */
2600static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
2601{
2602 struct usb_device *dev = chip->dev;
2603 struct usb_host_interface *host_iface;
2604 struct usb_interface *iface;
2605 unsigned char *p1;
2606 int i, j;
2607
2608 /* find audiocontrol interface */
2609 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2610 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2611 snd_printk(KERN_ERR "cannot find HEADER\n");
2612 return -EINVAL;
2613 }
2614 if (! p1[7] || p1[0] < 8 + p1[7]) {
2615 snd_printk(KERN_ERR "invalid HEADER\n");
2616 return -EINVAL;
2617 }
2618
2619 /*
2620 * parse all USB audio streaming interfaces
2621 */
2622 for (i = 0; i < p1[7]; i++) {
2623 struct usb_host_interface *alts;
2624 struct usb_interface_descriptor *altsd;
2625 j = p1[8 + i];
2626 iface = usb_ifnum_to_if(dev, j);
2627 if (!iface) {
2628 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2629 dev->devnum, ctrlif, j);
2630 continue;
2631 }
2632 if (usb_interface_claimed(iface)) {
2633 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2634 continue;
2635 }
2636 alts = &iface->altsetting[0];
2637 altsd = get_iface_desc(alts);
2638 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2639 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2640 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2641 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2642 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2643 continue;
2644 }
2645 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2646 continue;
2647 }
2648 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2649 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2650 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2651 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2652 /* skip non-supported classes */
2653 continue;
2654 }
2655 if (! parse_audio_endpoints(chip, j)) {
2656 usb_set_interface(dev, j, 0); /* reset the current interface */
2657 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2658 }
2659 }
2660
2661 return 0;
2662}
2663
2664/*
2665 * create a stream for an endpoint/altsetting without proper descriptors
2666 */
2667static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
2668 struct usb_interface *iface,
2669 const snd_usb_audio_quirk_t *quirk)
2670{
2671 struct audioformat *fp;
2672 struct usb_host_interface *alts;
2673 int stream, err;
2674 int *rate_table = NULL;
2675
2676 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2677 if (! fp) {
2678 snd_printk(KERN_ERR "cannot malloc\n");
2679 return -ENOMEM;
2680 }
2681 memcpy(fp, quirk->data, sizeof(*fp));
2682 if (fp->nr_rates > 0) {
2683 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2684 if (!rate_table) {
2685 kfree(fp);
2686 return -ENOMEM;
2687 }
2688 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2689 fp->rate_table = rate_table;
2690 }
2691
2692 stream = (fp->endpoint & USB_DIR_IN)
2693 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2694 err = add_audio_endpoint(chip, stream, fp);
2695 if (err < 0) {
2696 kfree(fp);
2697 kfree(rate_table);
2698 return err;
2699 }
2700 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2701 fp->altset_idx >= iface->num_altsetting) {
2702 kfree(fp);
2703 kfree(rate_table);
2704 return -EINVAL;
2705 }
2706 alts = &iface->altsetting[fp->altset_idx];
2707 usb_set_interface(chip->dev, fp->iface, 0);
2708 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2709 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2710 return 0;
2711}
2712
2713/*
2714 * create a stream for an interface with proper descriptors
2715 */
2716static int create_standard_interface_quirk(snd_usb_audio_t *chip,
2717 struct usb_interface *iface,
2718 const snd_usb_audio_quirk_t *quirk)
2719{
2720 struct usb_host_interface *alts;
2721 struct usb_interface_descriptor *altsd;
2722 int err;
2723
2724 alts = &iface->altsetting[0];
2725 altsd = get_iface_desc(alts);
2726 switch (quirk->type) {
2727 case QUIRK_AUDIO_STANDARD_INTERFACE:
2728 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
2729 if (!err)
2730 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0); /* reset the current interface */
2731 break;
2732 case QUIRK_MIDI_STANDARD_INTERFACE:
2733 err = snd_usb_create_midi_interface(chip, iface, NULL);
2734 break;
2735 default:
2736 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
2737 return -ENXIO;
2738 }
2739 if (err < 0) {
2740 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2741 altsd->bInterfaceNumber, err);
2742 return err;
2743 }
2744 return 0;
2745}
2746
2747/*
2748 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2749 * to detect the sample rate is by looking at wMaxPacketSize.
2750 */
2751static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
854af957
CL		 2752 struct usb_interface *iface,
2753 const snd_usb_audio_quirk_t *quirk)
1da177e4
LT		 2754{
2755 static const struct audioformat ua_format = {
2756 .format = SNDRV_PCM_FORMAT_S24_3LE,
2757 .channels = 2,
2758 .fmt_type = USB_FORMAT_TYPE_I,
2759 .altsetting = 1,
2760 .altset_idx = 1,
2761 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2762 };
2763 struct usb_host_interface *alts;
2764 struct usb_interface_descriptor *altsd;
2765 struct audioformat *fp;
2766 int stream, err;
2767
2768 /* both PCM and MIDI interfaces have 2 altsettings */
2769 if (iface->num_altsetting != 2)
2770 return -ENXIO;
2771 alts = &iface->altsetting[1];
2772 altsd = get_iface_desc(alts);
2773
2774 if (altsd->bNumEndpoints == 2) {
2775 static const snd_usb_midi_endpoint_info_t ua700_ep = {
2776 .out_cables = 0x0003,
2777 .in_cables = 0x0003
2778 };
2779 static const snd_usb_audio_quirk_t ua700_quirk = {
2780 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2781 .data = &ua700_ep
2782 };
2783 static const snd_usb_midi_endpoint_info_t ua25_ep = {
2784 .out_cables = 0x0001,
2785 .in_cables = 0x0001
2786 };
2787 static const snd_usb_audio_quirk_t ua25_quirk = {
2788 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2789 .data = &ua25_ep
2790 };
27d10f56 2791 if (chip->usb_id == USB_ID(0x0582, 0x002b))
1da177e4
LT		 2792 return snd_usb_create_midi_interface(chip, iface,
2793 &ua700_quirk);
2794 else
2795 return snd_usb_create_midi_interface(chip, iface,
2796 &ua25_quirk);
2797 }
2798
2799 if (altsd->bNumEndpoints != 1)
2800 return -ENXIO;
2801
2802 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2803 if (!fp)
2804 return -ENOMEM;
2805 memcpy(fp, &ua_format, sizeof(*fp));
2806
2807 fp->iface = altsd->bInterfaceNumber;
2808 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2809 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2810 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2811
2812 switch (fp->maxpacksize) {
2813 case 0x120:
2814 fp->rate_max = fp->rate_min = 44100;
2815 break;
2816 case 0x138:
2817 case 0x140:
2818 fp->rate_max = fp->rate_min = 48000;
2819 break;
2820 case 0x258:
2821 case 0x260:
2822 fp->rate_max = fp->rate_min = 96000;
2823 break;
2824 default:
2825 snd_printk(KERN_ERR "unknown sample rate\n");
2826 kfree(fp);
2827 return -ENXIO;
2828 }
2829
2830 stream = (fp->endpoint & USB_DIR_IN)
2831 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2832 err = add_audio_endpoint(chip, stream, fp);
2833 if (err < 0) {
2834 kfree(fp);
2835 return err;
2836 }
2837 usb_set_interface(chip->dev, fp->iface, 0);
2838 return 0;
2839}
2840
2841/*
2842 * Create a stream for an Edirol UA-1000 interface.
2843 */
854af957
CL		 2844static int create_ua1000_quirk(snd_usb_audio_t *chip,
2845 struct usb_interface *iface,
2846 const snd_usb_audio_quirk_t *quirk)
1da177e4
LT		 2847{
2848 static const struct audioformat ua1000_format = {
2849 .format = SNDRV_PCM_FORMAT_S32_LE,
2850 .fmt_type = USB_FORMAT_TYPE_I,
2851 .altsetting = 1,
2852 .altset_idx = 1,
2853 .attributes = 0,
2854 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2855 };
2856 struct usb_host_interface *alts;
2857 struct usb_interface_descriptor *altsd;
2858 struct audioformat *fp;
2859 int stream, err;
2860
2861 if (iface->num_altsetting != 2)
2862 return -ENXIO;
2863 alts = &iface->altsetting[1];
2864 altsd = get_iface_desc(alts);
2865 if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2866 altsd->bNumEndpoints != 1)
2867 return -ENXIO;
2868
2869 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2870 if (!fp)
2871 return -ENOMEM;
2872 memcpy(fp, &ua1000_format, sizeof(*fp));
2873
2874 fp->channels = alts->extra[4];
2875 fp->iface = altsd->bInterfaceNumber;
2876 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2877 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2878 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2879 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2880
2881 stream = (fp->endpoint & USB_DIR_IN)
2882 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2883 err = add_audio_endpoint(chip, stream, fp);
2884 if (err < 0) {
2885 kfree(fp);
2886 return err;
2887 }
2888 /* FIXME: playback must be synchronized to capture */
2889 usb_set_interface(chip->dev, fp->iface, 0);
2890 return 0;
2891}
2892
2893static int snd_usb_create_quirk(snd_usb_audio_t *chip,
2894 struct usb_interface *iface,
2895 const snd_usb_audio_quirk_t *quirk);
2896
2897/*
2898 * handle the quirks for the contained interfaces
2899 */
2900static int create_composite_quirk(snd_usb_audio_t *chip,
2901 struct usb_interface *iface,
2902 const snd_usb_audio_quirk_t *quirk)
2903{
2904 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2905 int err;
2906
2907 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2908 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2909 if (!iface)
2910 continue;
2911 if (quirk->ifnum != probed_ifnum &&
2912 usb_interface_claimed(iface))
2913 continue;
2914 err = snd_usb_create_quirk(chip, iface, quirk);
2915 if (err < 0)
2916 return err;
2917 if (quirk->ifnum != probed_ifnum)
2918 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2919 }
2920 return 0;
2921}
2922
854af957
CL		 2923static int ignore_interface_quirk(snd_usb_audio_t *chip,
2924 struct usb_interface *iface,
2925 const snd_usb_audio_quirk_t *quirk)
2926{
2927 return 0;
2928}
2929
1da177e4
LT		 2930
2931/*
2932 * boot quirks
2933 */
2934
2935#define EXTIGY_FIRMWARE_SIZE_OLD 794
2936#define EXTIGY_FIRMWARE_SIZE_NEW 483
2937
2938static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
2939{
2940 struct usb_host_config *config = dev->actconfig;
2941 int err;
2942
2943 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
2944 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
2945 snd_printdd("sending Extigy boot sequence...\n");
2946 /* Send message to force it to reconnect with full interface. */
2947 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
2948 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
2949 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
2950 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
2951 &dev->descriptor, sizeof(dev->descriptor));
2952 config = dev->actconfig;
2953 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
2954 err = usb_reset_configuration(dev);
2955 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
2956 snd_printdd("extigy_boot: new boot length = %d\n",
2957 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
2958 return -ENODEV; /* quit this anyway */
2959 }
2960 return 0;
2961}
2962
3a2f0856
CL		 2963static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
2964{
3a2f0856
CL		 2965 u8 buf = 1;
2966
2967 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
2968 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
2969 0, 0, &buf, 1, 1000);
2970 if (buf == 0) {
2971 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
2972 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
2973 1, 2000, NULL, 0, 1000);
2974 return -ENODEV;
2975 }
3a2f0856
CL		 2976 return 0;
2977}
2978
1da177e4
LT		 2979
2980/*
2981 * audio-interface quirks
2982 *
2983 * returns zero if no standard audio/MIDI parsing is needed.
2984 * returns a postive value if standard audio/midi interfaces are parsed
2985 * after this.
2986 * returns a negative value at error.
2987 */
2988static int snd_usb_create_quirk(snd_usb_audio_t *chip,
2989 struct usb_interface *iface,
2990 const snd_usb_audio_quirk_t *quirk)
2991{
854af957
CL		 2992 typedef int (*quirk_func_t)(snd_usb_audio_t *, struct usb_interface *,
2993 const snd_usb_audio_quirk_t *);
2994 static const quirk_func_t quirk_funcs[] = {
2995 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
2996 [QUIRK_COMPOSITE] = create_composite_quirk,
2997 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
2998 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
2999 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3000 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3001 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3002 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3003 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
3004 [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface,
3005 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_interface_quirk,
3006 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3007 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3008 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3009 };
3010
3011 if (quirk->type < QUIRK_TYPE_COUNT) {
3012 return quirk_funcs[quirk->type](chip, iface, quirk);
3013 } else {
1da177e4
LT		 3014 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3015 return -ENXIO;
3016 }
3017}
3018
3019
3020/*
3021 * common proc files to show the usb device info
3022 */
3023static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3024{
3025 snd_usb_audio_t *chip = entry->private_data;
3026 if (! chip->shutdown)
3027 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3028}
3029
3030static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
3031{
3032 snd_usb_audio_t *chip = entry->private_data;
3033 if (! chip->shutdown)
3034 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3035 USB_ID_VENDOR(chip->usb_id),
3036 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3037}
3038
3039static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
3040{
3041 snd_info_entry_t *entry;
3042 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3043 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3044 if (! snd_card_proc_new(chip->card, "usbid", &entry))
3045 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3046}
3047
3048/*
3049 * free the chip instance
3050 *
3051 * here we have to do not much, since pcm and controls are already freed
3052 *
3053 */
3054
3055static int snd_usb_audio_free(snd_usb_audio_t *chip)
3056{
3057 kfree(chip);
3058 return 0;
3059}
3060
3061static int snd_usb_audio_dev_free(snd_device_t *device)
3062{
3063 snd_usb_audio_t *chip = device->device_data;
3064 return snd_usb_audio_free(chip);
3065}
3066
3067
3068/*
3069 * create a chip instance and set its names.
3070 */
3071static int snd_usb_audio_create(struct usb_device *dev, int idx,
3072 const snd_usb_audio_quirk_t *quirk,
3073 snd_usb_audio_t **rchip)
3074{
3075 snd_card_t *card;
3076 snd_usb_audio_t *chip;
3077 int err, len;
3078 char component[14];
3079 static snd_device_ops_t ops = {
3080 .dev_free = snd_usb_audio_dev_free,
3081 };
3082
3083 *rchip = NULL;
3084
3085 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3086 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3087 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3088 return -ENXIO;
3089 }
3090
3091 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3092 if (card == NULL) {
3093 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3094 return -ENOMEM;
3095 }
3096
3097 chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
3098 if (! chip) {
3099 snd_card_free(card);
3100 return -ENOMEM;
3101 }
3102
3103 chip->index = idx;
3104 chip->dev = dev;
3105 chip->card = card;
27d10f56
CL		 3106 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3107 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3108 INIT_LIST_HEAD(&chip->pcm_list);
3109 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3110 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3111
3112 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3113 snd_usb_audio_free(chip);
3114 snd_card_free(card);
3115 return err;
3116 }
3117
3118 strcpy(card->driver, "USB-Audio");
3119 sprintf(component, "USB%04x:%04x",
27d10f56 3120 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3121 snd_component_add(card, component);
3122
3123 /* retrieve the device string as shortname */
3124 if (quirk && quirk->product_name) {
3125 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3126 } else {
3127 if (!dev->descriptor.iProduct ||
3128 usb_string(dev, dev->descriptor.iProduct,
3129 card->shortname, sizeof(card->shortname)) <= 0) {
3130 /* no name available from anywhere, so use ID */
3131 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3132 USB_ID_VENDOR(chip->usb_id),
3133 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3134 }
3135 }
3136
3137 /* retrieve the vendor and device strings as longname */
3138 if (quirk && quirk->vendor_name) {
3139 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3140 } else {
3141 if (dev->descriptor.iManufacturer)
3142 len = usb_string(dev, dev->descriptor.iManufacturer,
3143 card->longname, sizeof(card->longname));
3144 else
3145 len = 0;
3146 /* we don't really care if there isn't any vendor string */
3147 }
3148 if (len > 0)
3149 strlcat(card->longname, " ", sizeof(card->longname));
3150
3151 strlcat(card->longname, card->shortname, sizeof(card->longname));
3152
3153 len = strlcat(card->longname, " at ", sizeof(card->longname));
3154
3155 if (len < sizeof(card->longname))
3156 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3157
3158 strlcat(card->longname,
3159 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3160 sizeof(card->longname));
3161
3162 snd_usb_audio_create_proc(chip);
3163
1da177e4
LT		 3164 *rchip = chip;
3165 return 0;
3166}
3167
3168
3169/*
3170 * probe the active usb device
3171 *
3172 * note that this can be called multiple times per a device, when it
3173 * includes multiple audio control interfaces.
3174 *
3175 * thus we check the usb device pointer and creates the card instance
3176 * only at the first time. the successive calls of this function will
3177 * append the pcm interface to the corresponding card.
3178 */
3179static void *snd_usb_audio_probe(struct usb_device *dev,
3180 struct usb_interface *intf,
3181 const struct usb_device_id *usb_id)
3182{
3183 struct usb_host_config *config = dev->actconfig;
3184 const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info;
3185 int i, err;
3186 snd_usb_audio_t *chip;
3187 struct usb_host_interface *alts;
3188 int ifnum;
27d10f56 3189 u32 id;
1da177e4
LT		 3190
3191 alts = &intf->altsetting[0];
3192 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3193 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3194 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3195
3196 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3197 goto __err_val;
3198
3199 /* SB Extigy needs special boot-up sequence */
3200 /* if more models come, this will go to the quirk list. */
27d10f56 3201 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3202 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3203 goto __err_val;
3204 config = dev->actconfig;
3205 }
3a2f0856
CL		 3206 /* SB Audigy 2 NX needs its own boot-up magic, too */
3207 if (id == USB_ID(0x041e, 0x3020)) {
3208 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3209 goto __err_val;
3210 }
1da177e4
LT		 3211
3212 /*
3213 * found a config. now register to ALSA
3214 */
3215
3216 /* check whether it's already registered */
3217 chip = NULL;
3218 down(&register_mutex);
3219 for (i = 0; i < SNDRV_CARDS; i++) {
3220 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3221 if (usb_chip[i]->shutdown) {
3222 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3223 goto __error;
3224 }
3225 chip = usb_chip[i];
3226 break;
3227 }
3228 }
3229 if (! chip) {
3230 /* it's a fresh one.
3231 * now look for an empty slot and create a new card instance
3232 */
3233 /* first, set the current configuration for this device */
3234 if (usb_reset_configuration(dev) < 0) {
3235 snd_printk(KERN_ERR "cannot reset configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue);
3236 goto __error;
3237 }
3238 for (i = 0; i < SNDRV_CARDS; i++)
3239 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3240 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3241 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3242 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3243 goto __error;
3244 }
1dcd3ec4 3245 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3246 break;
3247 }
3248 if (! chip) {
3249 snd_printk(KERN_ERR "no available usb audio device\n");
3250 goto __error;
3251 }
3252 }
3253
3254 err = 1; /* continue */
3255 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3256 /* need some special handlings */
3257 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3258 goto __error;
3259 }
3260
3261 if (err > 0) {
3262 /* create normal USB audio interfaces */
3263 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3264 snd_usb_create_mixer(chip, ifnum) < 0) {
3265 goto __error;
3266 }
3267 }
3268
3269 /* we are allowed to call snd_card_register() many times */
3270 if (snd_card_register(chip->card) < 0) {
3271 goto __error;
3272 }
3273
3274 usb_chip[chip->index] = chip;
3275 chip->num_interfaces++;
3276 up(&register_mutex);
3277 return chip;
3278
3279 __error:
3280 if (chip && !chip->num_interfaces)
3281 snd_card_free(chip->card);
3282 up(&register_mutex);
3283 __err_val:
3284 return NULL;
3285}
3286
3287/*
3288 * we need to take care of counter, since disconnection can be called also
3289 * many times as well as usb_audio_probe().
3290 */
3291static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3292{
3293 snd_usb_audio_t *chip;
3294 snd_card_t *card;
3295 struct list_head *p;
3296
3297 if (ptr == (void *)-1L)
3298 return;
3299
3300 chip = ptr;
3301 card = chip->card;
3302 down(&register_mutex);
3303 chip->shutdown = 1;
3304 chip->num_interfaces--;
3305 if (chip->num_interfaces <= 0) {
3306 snd_card_disconnect(card);
3307 /* release the pcm resources */
3308 list_for_each(p, &chip->pcm_list) {
ee733397 3309 snd_usb_stream_disconnect(p);
1da177e4
LT		 3310 }
3311 /* release the midi resources */
3312 list_for_each(p, &chip->midi_list) {
ee733397 3313 snd_usbmidi_disconnect(p);
1da177e4 3314 }
84957a8a
CL		 3315 /* release mixer resources */
3316 list_for_each(p, &chip->mixer_list) {
3317 snd_usb_mixer_disconnect(p);
3318 }
1da177e4
LT		 3319 usb_chip[chip->index] = NULL;
3320 up(&register_mutex);
230cd5e2 3321 snd_card_free(card);
1da177e4
LT		 3322 } else {
3323 up(&register_mutex);
3324 }
3325}
3326
3327/*
3328 * new 2.5 USB kernel API
3329 */
3330static int usb_audio_probe(struct usb_interface *intf,
3331 const struct usb_device_id *id)
3332{
3333 void *chip;
3334 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3335 if (chip) {
3336 dev_set_drvdata(&intf->dev, chip);
3337 return 0;
3338 } else
3339 return -EIO;
3340}
3341
3342static void usb_audio_disconnect(struct usb_interface *intf)
3343{
3344 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3345 dev_get_drvdata(&intf->dev));
3346}
3347
3348
3349static int __init snd_usb_audio_init(void)
3350{
3351 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3352 printk(KERN_WARNING "invalid nrpacks value.\n");
3353 return -EINVAL;
3354 }
3355 usb_register(&usb_audio_driver);
3356 return 0;
3357}
3358
3359
3360static void __exit snd_usb_audio_cleanup(void)
3361{
3362 usb_deregister(&usb_audio_driver);
3363}
3364
3365module_init(snd_usb_audio_init);
3366module_exit(snd_usb_audio_cleanup);
Linux kernel - Deliverables
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