projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[ALSA] usb: usbmixer error path fix
[deliverable/linux.git] / sound / usb / usbaudio.c
CommitLineData
1da177e4
LT		 1/*
2 * (Tentative) USB Audio Driver for ALSA
3 *
4 * Main and PCM part
5 *
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7 *
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
11 *
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 *
27 *
28 * NOTES:
29 *
30 * - async unlink should be used for avoiding the sleep inside lock.
31 * 2.4.22 usb-uhci seems buggy for async unlinking and results in
32 * oops. in such a cse, pass async_unlink=0 option.
33 * - the linked URBs would be preferred but not used so far because of
34 * the instability of unlinking.
35 * - type II is not supported properly. there is no device which supports
36 * this type *correctly*. SB extigy looks as if it supports, but it's
37 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
38 */
39
40
41#include <sound/driver.h>
42#include <linux/bitops.h>
43#include <linux/init.h>
44#include <linux/list.h>
45#include <linux/slab.h>
46#include <linux/string.h>
47#include <linux/usb.h>
6207e51b 48#include <linux/vmalloc.h>
1da177e4 49#include <linux/moduleparam.h>
12aa7579 50#include <linux/mutex.h>
1da177e4
LT		 51#include <sound/core.h>
52#include <sound/info.h>
53#include <sound/pcm.h>
54#include <sound/pcm_params.h>
55#include <sound/initval.h>
56
57#include "usbaudio.h"
58
59
60MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
61MODULE_DESCRIPTION("USB Audio");
62MODULE_LICENSE("GPL");
63MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
64
65
66static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
67static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
68static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
69static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
70static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
92b9ac78 71static int nrpacks = 8; /* max. number of packets per urb */
1da177e4 72static int async_unlink = 1;
e311334e 73static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
1da177e4
LT		 74
75module_param_array(index, int, NULL, 0444);
76MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
77module_param_array(id, charp, NULL, 0444);
78MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
79module_param_array(enable, bool, NULL, 0444);
80MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
81module_param_array(vid, int, NULL, 0444);
82MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
83module_param_array(pid, int, NULL, 0444);
84MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
71d848ca 85module_param(nrpacks, int, 0644);
1da177e4
LT		 86MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
87module_param(async_unlink, bool, 0444);
88MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
e311334e
TLM		 89module_param_array(device_setup, int, NULL, 0444);
90MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
1da177e4
LT		 91
92
93/*
94 * debug the h/w constraints
95 */
96/* #define HW_CONST_DEBUG */
97
98
99/*
100 *
101 */
102
92b9ac78 103#define MAX_PACKS 20
1da177e4 104#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
15a24c07 105#define MAX_URBS 8
604cf499 106#define SYNC_URBS 4 /* always four urbs for sync */
1da177e4
LT		 107#define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
108
1da177e4
LT		 109struct audioformat {
110 struct list_head list;
111 snd_pcm_format_t format; /* format type */
112 unsigned int channels; /* # channels */
113 unsigned int fmt_type; /* USB audio format type (1-3) */
114 unsigned int frame_size; /* samples per frame for non-audio */
115 int iface; /* interface number */
116 unsigned char altsetting; /* corresponding alternate setting */
117 unsigned char altset_idx; /* array index of altenate setting */
118 unsigned char attributes; /* corresponding attributes of cs endpoint */
119 unsigned char endpoint; /* endpoint */
120 unsigned char ep_attr; /* endpoint attributes */
121 unsigned int maxpacksize; /* max. packet size */
122 unsigned int rates; /* rate bitmasks */
123 unsigned int rate_min, rate_max; /* min/max rates */
124 unsigned int nr_rates; /* number of rate table entries */
125 unsigned int *rate_table; /* rate table */
a79eee8d 126 unsigned int needs_knot; /* any unusual rates? */
1da177e4
LT		 127};
128
86e07d34
TI		 129struct snd_usb_substream;
130
1da177e4
LT		 131struct snd_urb_ctx {
132 struct urb *urb;
55851f73 133 unsigned int buffer_size; /* size of data buffer, if data URB */
86e07d34 134 struct snd_usb_substream *subs;
1da177e4
LT		 135 int index; /* index for urb array */
136 int packets; /* number of packets per urb */
1da177e4
LT		 137};
138
139struct snd_urb_ops {
86e07d34
TI		 140 int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
141 int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
142 int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
143 int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
1da177e4
LT		 144};
145
146struct snd_usb_substream {
86e07d34 147 struct snd_usb_stream *stream;
1da177e4 148 struct usb_device *dev;
86e07d34 149 struct snd_pcm_substream *pcm_substream;
1da177e4
LT		 150 int direction; /* playback or capture */
151 int interface; /* current interface */
152 int endpoint; /* assigned endpoint */
153 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
154 unsigned int cur_rate; /* current rate (for hw_params callback) */
155 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
156 unsigned int format; /* USB data format */
157 unsigned int datapipe; /* the data i/o pipe */
158 unsigned int syncpipe; /* 1 - async out or adaptive in */
573567e0 159 unsigned int datainterval; /* log_2 of data packet interval */
1da177e4
LT		 160 unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
161 unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
162 unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
163 unsigned int freqmax; /* maximum sampling rate, used for buffer management */
164 unsigned int phase; /* phase accumulator */
165 unsigned int maxpacksize; /* max packet size in bytes */
166 unsigned int maxframesize; /* max packet size in frames */
167 unsigned int curpacksize; /* current packet size in bytes (for capture) */
168 unsigned int curframesize; /* current packet size in frames (for capture) */
169 unsigned int fill_max: 1; /* fill max packet size always */
170 unsigned int fmt_type; /* USB audio format type (1-3) */
9624ea81 171 unsigned int packs_per_ms; /* packets per millisecond (for playback) */
1da177e4
LT		 172
173 unsigned int running: 1; /* running status */
174
1da177e4 175 unsigned int hwptr_done; /* processed frame position in the buffer */
1da177e4
LT		 176 unsigned int transfer_done; /* processed frames since last period update */
177 unsigned long active_mask; /* bitmask of active urbs */
178 unsigned long unlink_mask; /* bitmask of unlinked urbs */
179
180 unsigned int nurbs; /* # urbs */
86e07d34
TI		 181 struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
182 struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
55851f73
CL		 183 char *syncbuf; /* sync buffer for all sync URBs */
184 dma_addr_t sync_dma; /* DMA address of syncbuf */
1da177e4
LT		 185
186 u64 formats; /* format bitmasks (all or'ed) */
187 unsigned int num_formats; /* number of supported audio formats (list) */
188 struct list_head fmt_list; /* format list */
189 spinlock_t lock;
190
191 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
192};
193
194
195struct snd_usb_stream {
86e07d34
TI		 196 struct snd_usb_audio *chip;
197 struct snd_pcm *pcm;
1da177e4
LT		 198 int pcm_index;
199 unsigned int fmt_type; /* USB audio format type (1-3) */
86e07d34 200 struct snd_usb_substream substream[2];
1da177e4
LT		 201 struct list_head list;
202};
203
204
205/*
206 * we keep the snd_usb_audio_t instances by ourselves for merging
207 * the all interfaces on the same card as one sound device.
208 */
209
12aa7579 210static DEFINE_MUTEX(register_mutex);
86e07d34 211static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
1da177e4
LT		 212
213
214/*
215 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
216 * this will overflow at approx 524 kHz
217 */
77933d72 218static inline unsigned get_usb_full_speed_rate(unsigned int rate)
1da177e4
LT		 219{
220 return ((rate << 13) + 62) / 125;
221}
222
223/*
224 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
225 * this will overflow at approx 4 MHz
226 */
77933d72 227static inline unsigned get_usb_high_speed_rate(unsigned int rate)
1da177e4
LT		 228{
229 return ((rate << 10) + 62) / 125;
230}
231
232/* convert our full speed USB rate into sampling rate in Hz */
77933d72 233static inline unsigned get_full_speed_hz(unsigned int usb_rate)
1da177e4
LT		 234{
235 return (usb_rate * 125 + (1 << 12)) >> 13;
236}
237
238/* convert our high speed USB rate into sampling rate in Hz */
77933d72 239static inline unsigned get_high_speed_hz(unsigned int usb_rate)
1da177e4
LT		 240{
241 return (usb_rate * 125 + (1 << 9)) >> 10;
242}
243
244
245/*
246 * prepare urb for full speed capture sync pipe
247 *
248 * fill the length and offset of each urb descriptor.
249 * the fixed 10.14 frequency is passed through the pipe.
250 */
86e07d34
TI		 251static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
252 struct snd_pcm_runtime *runtime,
1da177e4
LT		 253 struct urb *urb)
254{
255 unsigned char *cp = urb->transfer_buffer;
86e07d34 256 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 257
1da177e4 258 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 259 urb->iso_frame_desc[0].length = 3;
260 urb->iso_frame_desc[0].offset = 0;
261 cp[0] = subs->freqn >> 2;
262 cp[1] = subs->freqn >> 10;
263 cp[2] = subs->freqn >> 18;
1da177e4
LT		 264 return 0;
265}
266
267/*
268 * prepare urb for high speed capture sync pipe
269 *
270 * fill the length and offset of each urb descriptor.
271 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
272 */
86e07d34
TI		 273static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
274 struct snd_pcm_runtime *runtime,
1da177e4
LT		 275 struct urb *urb)
276{
277 unsigned char *cp = urb->transfer_buffer;
86e07d34 278 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 279
1da177e4 280 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 281 urb->iso_frame_desc[0].length = 4;
282 urb->iso_frame_desc[0].offset = 0;
283 cp[0] = subs->freqn;
284 cp[1] = subs->freqn >> 8;
285 cp[2] = subs->freqn >> 16;
286 cp[3] = subs->freqn >> 24;
1da177e4
LT		 287 return 0;
288}
289
290/*
291 * process after capture sync complete
292 * - nothing to do
293 */
86e07d34
TI		 294static int retire_capture_sync_urb(struct snd_usb_substream *subs,
295 struct snd_pcm_runtime *runtime,
1da177e4
LT		 296 struct urb *urb)
297{
298 return 0;
299}
300
301/*
302 * prepare urb for capture data pipe
303 *
304 * fill the offset and length of each descriptor.
305 *
306 * we use a temporary buffer to write the captured data.
307 * since the length of written data is determined by host, we cannot
308 * write onto the pcm buffer directly... the data is thus copied
309 * later at complete callback to the global buffer.
310 */
86e07d34
TI		 311static int prepare_capture_urb(struct snd_usb_substream *subs,
312 struct snd_pcm_runtime *runtime,
1da177e4
LT		 313 struct urb *urb)
314{
315 int i, offs;
86e07d34 316 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4
LT		 317
318 offs = 0;
319 urb->dev = ctx->subs->dev; /* we need to set this at each time */
1da177e4
LT		 320 for (i = 0; i < ctx->packets; i++) {
321 urb->iso_frame_desc[i].offset = offs;
322 urb->iso_frame_desc[i].length = subs->curpacksize;
323 offs += subs->curpacksize;
1da177e4 324 }
1da177e4 325 urb->transfer_buffer_length = offs;
b263a9bd 326 urb->number_of_packets = ctx->packets;
1da177e4
LT		 327#if 0 // for check
328 if (! urb->bandwidth) {
329 int bustime;
330 bustime = usb_check_bandwidth(urb->dev, urb);
331 if (bustime < 0)
332 return bustime;
333 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
334 usb_claim_bandwidth(urb->dev, urb, bustime, 1);
335 }
336#endif // for check
337 return 0;
338}
339
340/*
341 * process after capture complete
342 *
343 * copy the data from each desctiptor to the pcm buffer, and
344 * update the current position.
345 */
86e07d34
TI		 346static int retire_capture_urb(struct snd_usb_substream *subs,
347 struct snd_pcm_runtime *runtime,
1da177e4
LT		 348 struct urb *urb)
349{
350 unsigned long flags;
351 unsigned char *cp;
352 int i;
353 unsigned int stride, len, oldptr;
b263a9bd 354 int period_elapsed = 0;
1da177e4
LT		 355
356 stride = runtime->frame_bits >> 3;
357
358 for (i = 0; i < urb->number_of_packets; i++) {
359 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
360 if (urb->iso_frame_desc[i].status) {
361 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
362 // continue;
363 }
364 len = urb->iso_frame_desc[i].actual_length / stride;
365 if (! len)
366 continue;
367 /* update the current pointer */
368 spin_lock_irqsave(&subs->lock, flags);
369 oldptr = subs->hwptr_done;
370 subs->hwptr_done += len;
371 if (subs->hwptr_done >= runtime->buffer_size)
372 subs->hwptr_done -= runtime->buffer_size;
373 subs->transfer_done += len;
b263a9bd
CL		 374 if (subs->transfer_done >= runtime->period_size) {
375 subs->transfer_done -= runtime->period_size;
376 period_elapsed = 1;
377 }
1da177e4
LT		 378 spin_unlock_irqrestore(&subs->lock, flags);
379 /* copy a data chunk */
380 if (oldptr + len > runtime->buffer_size) {
381 unsigned int cnt = runtime->buffer_size - oldptr;
382 unsigned int blen = cnt * stride;
383 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
384 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
385 } else {
386 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
387 }
1da177e4 388 }
b263a9bd
CL		 389 if (period_elapsed)
390 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 391 return 0;
392}
393
394
395/*
396 * prepare urb for full speed playback sync pipe
397 *
398 * set up the offset and length to receive the current frequency.
399 */
400
86e07d34
TI		 401static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
402 struct snd_pcm_runtime *runtime,
1da177e4
LT		 403 struct urb *urb)
404{
86e07d34 405 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 406
1da177e4 407 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 408 urb->iso_frame_desc[0].length = 3;
409 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 410 return 0;
411}
412
413/*
414 * prepare urb for high speed playback sync pipe
415 *
416 * set up the offset and length to receive the current frequency.
417 */
418
86e07d34
TI		 419static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
420 struct snd_pcm_runtime *runtime,
1da177e4
LT		 421 struct urb *urb)
422{
86e07d34 423 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4 424
1da177e4 425 urb->dev = ctx->subs->dev; /* we need to set this at each time */
ca81090a
CL		 426 urb->iso_frame_desc[0].length = 4;
427 urb->iso_frame_desc[0].offset = 0;
1da177e4
LT		 428 return 0;
429}
430
431/*
432 * process after full speed playback sync complete
433 *
434 * retrieve the current 10.14 frequency from pipe, and set it.
435 * the value is referred in prepare_playback_urb().
436 */
86e07d34
TI		 437static int retire_playback_sync_urb(struct snd_usb_substream *subs,
438 struct snd_pcm_runtime *runtime,
1da177e4
LT		 439 struct urb *urb)
440{
ca81090a 441 unsigned int f;
1da177e4
LT		 442 unsigned long flags;
443
ca81090a
CL		 444 if (urb->iso_frame_desc[0].status == 0 &&
445 urb->iso_frame_desc[0].actual_length == 3) {
446 f = combine_triple((u8*)urb->transfer_buffer) << 2;
50cdbf15
CL		 447 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
448 spin_lock_irqsave(&subs->lock, flags);
449 subs->freqm = f;
450 spin_unlock_irqrestore(&subs->lock, flags);
1da177e4 451 }
1da177e4
LT		 452 }
453
454 return 0;
455}
456
457/*
458 * process after high speed playback sync complete
459 *
460 * retrieve the current 12.13 frequency from pipe, and set it.
461 * the value is referred in prepare_playback_urb().
462 */
86e07d34
TI		 463static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
464 struct snd_pcm_runtime *runtime,
1da177e4
LT		 465 struct urb *urb)
466{
ca81090a 467 unsigned int f;
1da177e4
LT		 468 unsigned long flags;
469
ca81090a
CL		 470 if (urb->iso_frame_desc[0].status == 0 &&
471 urb->iso_frame_desc[0].actual_length == 4) {
472 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
50cdbf15
CL		 473 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
474 spin_lock_irqsave(&subs->lock, flags);
475 subs->freqm = f;
476 spin_unlock_irqrestore(&subs->lock, flags);
477 }
1da177e4
LT		 478 }
479
480 return 0;
481}
482
9568f461
CL		 483/* determine the number of frames in the next packet */
484static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
485{
486 if (subs->fill_max)
487 return subs->maxframesize;
488 else {
489 subs->phase = (subs->phase & 0xffff)
490 + (subs->freqm << subs->datainterval);
491 return min(subs->phase >> 16, subs->maxframesize);
492 }
493}
494
b55bbf06
CL		 495/*
496 * Prepare urb for streaming before playback starts.
497 *
4b284928 498 * We don't yet have data, so we send a frame of silence.
b55bbf06 499 */
86e07d34
TI		 500static int prepare_startup_playback_urb(struct snd_usb_substream *subs,
501 struct snd_pcm_runtime *runtime,
b55bbf06
CL		 502 struct urb *urb)
503{
4b284928 504 unsigned int i, offs, counts;
86e07d34 505 struct snd_urb_ctx *ctx = urb->context;
4b284928 506 int stride = runtime->frame_bits >> 3;
b55bbf06 507
4b284928 508 offs = 0;
b55bbf06
CL		 509 urb->dev = ctx->subs->dev;
510 urb->number_of_packets = subs->packs_per_ms;
511 for (i = 0; i < subs->packs_per_ms; ++i) {
9568f461 512 counts = snd_usb_audio_next_packet_size(subs);
4b284928
CL		 513 urb->iso_frame_desc[i].offset = offs * stride;
514 urb->iso_frame_desc[i].length = counts * stride;
515 offs += counts;
b55bbf06 516 }
4b284928
CL		 517 urb->transfer_buffer_length = offs * stride;
518 memset(urb->transfer_buffer,
519 subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
520 offs * stride);
b55bbf06
CL		 521 return 0;
522}
523
1da177e4
LT		 524/*
525 * prepare urb for playback data pipe
526 *
7efd8bc8
CL		 527 * Since a URB can handle only a single linear buffer, we must use double
528 * buffering when the data to be transferred overflows the buffer boundary.
529 * To avoid inconsistencies when updating hwptr_done, we use double buffering
530 * for all URBs.
1da177e4 531 */
86e07d34
TI		 532static int prepare_playback_urb(struct snd_usb_substream *subs,
533 struct snd_pcm_runtime *runtime,
1da177e4
LT		 534 struct urb *urb)
535{
536 int i, stride, offs;
537 unsigned int counts;
538 unsigned long flags;
7efd8bc8 539 int period_elapsed = 0;
86e07d34 540 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
1da177e4
LT		 541
542 stride = runtime->frame_bits >> 3;
543
544 offs = 0;
545 urb->dev = ctx->subs->dev; /* we need to set this at each time */
546 urb->number_of_packets = 0;
547 spin_lock_irqsave(&subs->lock, flags);
548 for (i = 0; i < ctx->packets; i++) {
9568f461 549 counts = snd_usb_audio_next_packet_size(subs);
1da177e4
LT		 550 /* set up descriptor */
551 urb->iso_frame_desc[i].offset = offs * stride;
552 urb->iso_frame_desc[i].length = counts * stride;
553 offs += counts;
554 urb->number_of_packets++;
7efd8bc8
CL		 555 subs->transfer_done += counts;
556 if (subs->transfer_done >= runtime->period_size) {
557 subs->transfer_done -= runtime->period_size;
558 period_elapsed = 1;
1da177e4 559 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
7efd8bc8
CL		 560 if (subs->transfer_done > 0) {
561 /* FIXME: fill-max mode is not
562 * supported yet */
563 offs -= subs->transfer_done;
564 counts -= subs->transfer_done;
565 urb->iso_frame_desc[i].length =
566 counts * stride;
567 subs->transfer_done = 0;
1da177e4
LT		 568 }
569 i++;
570 if (i < ctx->packets) {
571 /* add a transfer delimiter */
7efd8bc8
CL		 572 urb->iso_frame_desc[i].offset =
573 offs * stride;
1da177e4
LT		 574 urb->iso_frame_desc[i].length = 0;
575 urb->number_of_packets++;
576 }
9624ea81 577 break;
1da177e4 578 }
1da177e4 579 }
9624ea81
CL		 580 /* finish at the frame boundary at/after the period boundary */
581 if (period_elapsed &&
582 (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
583 break;
1da177e4 584 }
7efd8bc8
CL		 585 if (subs->hwptr_done + offs > runtime->buffer_size) {
586 /* err, the transferred area goes over buffer boundary. */
587 unsigned int len = runtime->buffer_size - subs->hwptr_done;
588 memcpy(urb->transfer_buffer,
589 runtime->dma_area + subs->hwptr_done * stride,
590 len * stride);
591 memcpy(urb->transfer_buffer + len * stride,
592 runtime->dma_area,
593 (offs - len) * stride);
1da177e4 594 } else {
7efd8bc8
CL		 595 memcpy(urb->transfer_buffer,
596 runtime->dma_area + subs->hwptr_done * stride,
597 offs * stride);
1da177e4 598 }
7efd8bc8
CL		 599 subs->hwptr_done += offs;
600 if (subs->hwptr_done >= runtime->buffer_size)
601 subs->hwptr_done -= runtime->buffer_size;
1da177e4
LT		 602 spin_unlock_irqrestore(&subs->lock, flags);
603 urb->transfer_buffer_length = offs * stride;
b55bbf06
CL		 604 if (period_elapsed)
605 snd_pcm_period_elapsed(subs->pcm_substream);
1da177e4
LT		 606 return 0;
607}
608
609/*
610 * process after playback data complete
7efd8bc8 611 * - nothing to do
1da177e4 612 */
86e07d34
TI		 613static int retire_playback_urb(struct snd_usb_substream *subs,
614 struct snd_pcm_runtime *runtime,
1da177e4
LT		 615 struct urb *urb)
616{
1da177e4
LT		 617 return 0;
618}
619
620
621/*
622 */
623static struct snd_urb_ops audio_urb_ops[2] = {
624 {
b55bbf06 625 .prepare = prepare_startup_playback_urb,
1da177e4
LT		 626 .retire = retire_playback_urb,
627 .prepare_sync = prepare_playback_sync_urb,
628 .retire_sync = retire_playback_sync_urb,
629 },
630 {
631 .prepare = prepare_capture_urb,
632 .retire = retire_capture_urb,
633 .prepare_sync = prepare_capture_sync_urb,
634 .retire_sync = retire_capture_sync_urb,
635 },
636};
637
638static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
639 {
b55bbf06 640 .prepare = prepare_startup_playback_urb,
1da177e4
LT		 641 .retire = retire_playback_urb,
642 .prepare_sync = prepare_playback_sync_urb_hs,
643 .retire_sync = retire_playback_sync_urb_hs,
644 },
645 {
646 .prepare = prepare_capture_urb,
647 .retire = retire_capture_urb,
648 .prepare_sync = prepare_capture_sync_urb_hs,
649 .retire_sync = retire_capture_sync_urb,
650 },
651};
652
653/*
654 * complete callback from data urb
655 */
7d12e780 656static void snd_complete_urb(struct urb *urb)
1da177e4 657{
86e07d34
TI		 658 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
659 struct snd_usb_substream *subs = ctx->subs;
660 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 661 int err = 0;
662
663 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
664 ! subs->running || /* can be stopped during retire callback */
665 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
666 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
667 clear_bit(ctx->index, &subs->active_mask);
668 if (err < 0) {
669 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
670 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
671 }
672 }
673}
674
675
676/*
677 * complete callback from sync urb
678 */
7d12e780 679static void snd_complete_sync_urb(struct urb *urb)
1da177e4 680{
86e07d34
TI		 681 struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
682 struct snd_usb_substream *subs = ctx->subs;
683 struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
1da177e4
LT		 684 int err = 0;
685
686 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
687 ! subs->running || /* can be stopped during retire callback */
688 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
689 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
690 clear_bit(ctx->index + 16, &subs->active_mask);
691 if (err < 0) {
692 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
693 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
694 }
695 }
696}
697
698
6207e51b 699/* get the physical page pointer at the given offset */
86e07d34 700static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
6207e51b
CL		 701 unsigned long offset)
702{
703 void *pageptr = subs->runtime->dma_area + offset;
704 return vmalloc_to_page(pageptr);
705}
706
707/* allocate virtual buffer; may be called more than once */
86e07d34 708static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
6207e51b 709{
86e07d34 710 struct snd_pcm_runtime *runtime = subs->runtime;
6207e51b
CL		 711 if (runtime->dma_area) {
712 if (runtime->dma_bytes >= size)
713 return 0; /* already large enough */
b1d5776d 714 vfree(runtime->dma_area);
6207e51b 715 }
b1d5776d 716 runtime->dma_area = vmalloc(size);
6207e51b
CL		 717 if (! runtime->dma_area)
718 return -ENOMEM;
719 runtime->dma_bytes = size;
720 return 0;
721}
722
723/* free virtual buffer; may be called more than once */
86e07d34 724static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
6207e51b 725{
86e07d34 726 struct snd_pcm_runtime *runtime = subs->runtime;
9c4be3d3
JJ		 727
728 vfree(runtime->dma_area);
729 runtime->dma_area = NULL;
6207e51b
CL		 730 return 0;
731}
732
733
1da177e4
LT		 734/*
735 * unlink active urbs.
736 */
86e07d34 737static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
1da177e4
LT		 738{
739 unsigned int i;
740 int async;
741
742 subs->running = 0;
743
744 if (!force && subs->stream->chip->shutdown) /* to be sure... */
745 return -EBADFD;
746
747 async = !can_sleep && async_unlink;
748
749 if (! async && in_interrupt())
750 return 0;
751
752 for (i = 0; i < subs->nurbs; i++) {
753 if (test_bit(i, &subs->active_mask)) {
754 if (! test_and_set_bit(i, &subs->unlink_mask)) {
755 struct urb *u = subs->dataurb[i].urb;
b375a049 756 if (async)
1da177e4 757 usb_unlink_urb(u);
b375a049 758 else
1da177e4
LT		 759 usb_kill_urb(u);
760 }
761 }
762 }
763 if (subs->syncpipe) {
764 for (i = 0; i < SYNC_URBS; i++) {
765 if (test_bit(i+16, &subs->active_mask)) {
766 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
767 struct urb *u = subs->syncurb[i].urb;
b375a049 768 if (async)
1da177e4 769 usb_unlink_urb(u);
b375a049 770 else
1da177e4
LT		 771 usb_kill_urb(u);
772 }
773 }
774 }
775 }
776 return 0;
777}
778
779
32e19e88
CL		 780static const char *usb_error_string(int err)
781{
782 switch (err) {
783 case -ENODEV:
784 return "no device";
785 case -ENOENT:
786 return "endpoint not enabled";
787 case -EPIPE:
788 return "endpoint stalled";
789 case -ENOSPC:
790 return "not enough bandwidth";
791 case -ESHUTDOWN:
792 return "device disabled";
793 case -EHOSTUNREACH:
794 return "device suspended";
3e964432
CL		 795#ifndef CONFIG_USB_EHCI_SPLIT_ISO
796 case -ENOSYS:
797 return "enable CONFIG_USB_EHCI_SPLIT_ISO to play through a hub";
798#endif
32e19e88
CL		 799 case -EINVAL:
800 case -EAGAIN:
801 case -EFBIG:
802 case -EMSGSIZE:
803 return "internal error";
804 default:
805 return "unknown error";
806 }
807}
808
1da177e4
LT		 809/*
810 * set up and start data/sync urbs
811 */
86e07d34 812static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
1da177e4
LT		 813{
814 unsigned int i;
815 int err;
816
817 if (subs->stream->chip->shutdown)
818 return -EBADFD;
819
820 for (i = 0; i < subs->nurbs; i++) {
821 snd_assert(subs->dataurb[i].urb, return -EINVAL);
822 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
823 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
824 goto __error;
825 }
826 }
827 if (subs->syncpipe) {
828 for (i = 0; i < SYNC_URBS; i++) {
829 snd_assert(subs->syncurb[i].urb, return -EINVAL);
830 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
831 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
832 goto __error;
833 }
834 }
835 }
836
837 subs->active_mask = 0;
838 subs->unlink_mask = 0;
839 subs->running = 1;
840 for (i = 0; i < subs->nurbs; i++) {
32e19e88
CL		 841 err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC);
842 if (err < 0) {
843 snd_printk(KERN_ERR "cannot submit datapipe "
844 "for urb %d, error %d: %s\n",
845 i, err, usb_error_string(err));
1da177e4
LT		 846 goto __error;
847 }
848 set_bit(i, &subs->active_mask);
849 }
850 if (subs->syncpipe) {
851 for (i = 0; i < SYNC_URBS; i++) {
32e19e88
CL		 852 err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC);
853 if (err < 0) {
854 snd_printk(KERN_ERR "cannot submit syncpipe "
855 "for urb %d, error %d: %s\n",
856 i, err, usb_error_string(err));
1da177e4
LT		 857 goto __error;
858 }
859 set_bit(i + 16, &subs->active_mask);
860 }
861 }
862 return 0;
863
864 __error:
865 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
866 deactivate_urbs(subs, 0, 0);
867 return -EPIPE;
868}
869
870
871/*
872 * wait until all urbs are processed.
873 */
86e07d34 874static int wait_clear_urbs(struct snd_usb_substream *subs)
1da177e4 875{
b27c187f 876 unsigned long end_time = jiffies + msecs_to_jiffies(1000);
1da177e4
LT		 877 unsigned int i;
878 int alive;
879
880 do {
881 alive = 0;
882 for (i = 0; i < subs->nurbs; i++) {
883 if (test_bit(i, &subs->active_mask))
884 alive++;
885 }
886 if (subs->syncpipe) {
887 for (i = 0; i < SYNC_URBS; i++) {
888 if (test_bit(i + 16, &subs->active_mask))
889 alive++;
890 }
891 }
892 if (! alive)
893 break;
8433a509 894 schedule_timeout_uninterruptible(1);
b27c187f 895 } while (time_before(jiffies, end_time));
1da177e4
LT		 896 if (alive)
897 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
898 return 0;
899}
900
901
902/*
903 * return the current pcm pointer. just return the hwptr_done value.
904 */
86e07d34 905static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 906{
86e07d34 907 struct snd_usb_substream *subs;
daa150ef
CL		 908 snd_pcm_uframes_t hwptr_done;
909
86e07d34 910 subs = (struct snd_usb_substream *)substream->runtime->private_data;
daa150ef
CL		 911 spin_lock(&subs->lock);
912 hwptr_done = subs->hwptr_done;
913 spin_unlock(&subs->lock);
914 return hwptr_done;
1da177e4
LT		 915}
916
917
918/*
b55bbf06 919 * start/stop playback substream
1da177e4 920 */
86e07d34 921static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
b55bbf06 922 int cmd)
1da177e4 923{
86e07d34 924 struct snd_usb_substream *subs = substream->runtime->private_data;
b55bbf06
CL		 925
926 switch (cmd) {
927 case SNDRV_PCM_TRIGGER_START:
928 subs->ops.prepare = prepare_playback_urb;
929 return 0;
930 case SNDRV_PCM_TRIGGER_STOP:
931 return deactivate_urbs(subs, 0, 0);
932 default:
933 return -EINVAL;
934 }
935}
936
937/*
938 * start/stop capture substream
939 */
86e07d34 940static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
b55bbf06
CL		 941 int cmd)
942{
86e07d34 943 struct snd_usb_substream *subs = substream->runtime->private_data;
1da177e4
LT		 944
945 switch (cmd) {
946 case SNDRV_PCM_TRIGGER_START:
b55bbf06 947 return start_urbs(subs, substream->runtime);
1da177e4 948 case SNDRV_PCM_TRIGGER_STOP:
b55bbf06 949 return deactivate_urbs(subs, 0, 0);
1da177e4 950 default:
b55bbf06 951 return -EINVAL;
1da177e4 952 }
1da177e4
LT		 953}
954
955
956/*
957 * release a urb data
958 */
86e07d34 959static void release_urb_ctx(struct snd_urb_ctx *u)
1da177e4
LT		 960{
961 if (u->urb) {
55851f73
CL		 962 if (u->buffer_size)
963 usb_buffer_free(u->subs->dev, u->buffer_size,
964 u->urb->transfer_buffer,
965 u->urb->transfer_dma);
1da177e4
LT		 966 usb_free_urb(u->urb);
967 u->urb = NULL;
968 }
1da177e4
LT		 969}
970
971/*
972 * release a substream
973 */
86e07d34 974static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1da177e4
LT		 975{
976 int i;
977
978 /* stop urbs (to be sure) */
979 deactivate_urbs(subs, force, 1);
980 wait_clear_urbs(subs);
981
982 for (i = 0; i < MAX_URBS; i++)
983 release_urb_ctx(&subs->dataurb[i]);
984 for (i = 0; i < SYNC_URBS; i++)
985 release_urb_ctx(&subs->syncurb[i]);
55851f73
CL		 986 usb_buffer_free(subs->dev, SYNC_URBS * 4,
987 subs->syncbuf, subs->sync_dma);
988 subs->syncbuf = NULL;
1da177e4
LT		 989 subs->nurbs = 0;
990}
991
992/*
993 * initialize a substream for plaback/capture
994 */
86e07d34 995static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1da177e4
LT		 996 unsigned int rate, unsigned int frame_bits)
997{
998 unsigned int maxsize, n, i;
999 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
a93bf990 1000 unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1da177e4
LT		 1001
1002 /* calculate the frequency in 16.16 format */
1003 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1004 subs->freqn = get_usb_full_speed_rate(rate);
1005 else
1006 subs->freqn = get_usb_high_speed_rate(rate);
1007 subs->freqm = subs->freqn;
573567e0
CL		 1008 /* calculate max. frequency */
1009 if (subs->maxpacksize) {
1010 /* whatever fits into a max. size packet */
1da177e4 1011 maxsize = subs->maxpacksize;
573567e0
CL		 1012 subs->freqmax = (maxsize / (frame_bits >> 3))
1013 << (16 - subs->datainterval);
1014 } else {
1015 /* no max. packet size: just take 25% higher than nominal */
1016 subs->freqmax = subs->freqn + (subs->freqn >> 2);
1017 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
1018 >> (16 - subs->datainterval);
1da177e4 1019 }
573567e0 1020 subs->phase = 0;
1da177e4
LT		 1021
1022 if (subs->fill_max)
1023 subs->curpacksize = subs->maxpacksize;
1024 else
1025 subs->curpacksize = maxsize;
1026
a93bf990
CL		 1027 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
1028 packs_per_ms = 8 >> subs->datainterval;
1029 else
1030 packs_per_ms = 1;
9624ea81 1031 subs->packs_per_ms = packs_per_ms;
a93bf990 1032
71d848ca 1033 if (is_playback) {
1da177e4 1034 urb_packs = nrpacks;
71d848ca
CL		 1035 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
1036 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
1037 } else
15a24c07 1038 urb_packs = 1;
a93bf990 1039 urb_packs *= packs_per_ms;
1da177e4 1040
1da177e4 1041 /* decide how many packets to be used */
15a24c07 1042 if (is_playback) {
d6db392e
CL		 1043 unsigned int minsize;
1044 /* determine how small a packet can be */
1045 minsize = (subs->freqn >> (16 - subs->datainterval))
1046 * (frame_bits >> 3);
7efd8bc8 1047 /* with sync from device, assume it can be 12% lower */
d6db392e 1048 if (subs->syncpipe)
7efd8bc8 1049 minsize -= minsize >> 3;
d6db392e
CL		 1050 minsize = max(minsize, 1u);
1051 total_packs = (period_bytes + minsize - 1) / minsize;
a93bf990
CL		 1052 /* round up to multiple of packs_per_ms */
1053 total_packs = (total_packs + packs_per_ms - 1)
1054 & ~(packs_per_ms - 1);
1055 /* we need at least two URBs for queueing */
1056 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
1057 total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
15a24c07
CL		 1058 } else {
1059 total_packs = MAX_URBS * urb_packs;
1060 }
1da177e4
LT		 1061 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1062 if (subs->nurbs > MAX_URBS) {
1063 /* too much... */
1064 subs->nurbs = MAX_URBS;
1065 total_packs = MAX_URBS * urb_packs;
1066 }
1067 n = total_packs;
1068 for (i = 0; i < subs->nurbs; i++) {
1069 npacks[i] = n > urb_packs ? urb_packs : n;
1070 n -= urb_packs;
1071 }
1072 if (subs->nurbs <= 1) {
1073 /* too little - we need at least two packets
1074 * to ensure contiguous playback/capture
1075 */
1076 subs->nurbs = 2;
1077 npacks[0] = (total_packs + 1) / 2;
1078 npacks[1] = total_packs - npacks[0];
a93bf990 1079 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1da177e4
LT		 1080 /* the last packet is too small.. */
1081 if (subs->nurbs > 2) {
1082 /* merge to the first one */
1083 npacks[0] += npacks[subs->nurbs - 1];
1084 subs->nurbs--;
1085 } else {
1086 /* divide to two */
1087 subs->nurbs = 2;
1088 npacks[0] = (total_packs + 1) / 2;
1089 npacks[1] = total_packs - npacks[0];
1090 }
1091 }
1092
1093 /* allocate and initialize data urbs */
1094 for (i = 0; i < subs->nurbs; i++) {
86e07d34 1095 struct snd_urb_ctx *u = &subs->dataurb[i];
1da177e4
LT		 1096 u->index = i;
1097 u->subs = subs;
1da177e4 1098 u->packets = npacks[i];
55851f73 1099 u->buffer_size = maxsize * u->packets;
1da177e4
LT		 1100 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1101 u->packets++; /* for transfer delimiter */
1da177e4 1102 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
55851f73
CL		 1103 if (! u->urb)
1104 goto out_of_memory;
1105 u->urb->transfer_buffer =
1106 usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1107 &u->urb->transfer_dma);
1108 if (! u->urb->transfer_buffer)
1109 goto out_of_memory;
1da177e4 1110 u->urb->pipe = subs->datapipe;
55851f73 1111 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
573567e0 1112 u->urb->interval = 1 << subs->datainterval;
1da177e4 1113 u->urb->context = u;
3527a008 1114 u->urb->complete = snd_complete_urb;
1da177e4
LT		 1115 }
1116
1117 if (subs->syncpipe) {
1118 /* allocate and initialize sync urbs */
55851f73
CL		 1119 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1120 GFP_KERNEL, &subs->sync_dma);
1121 if (! subs->syncbuf)
1122 goto out_of_memory;
1da177e4 1123 for (i = 0; i < SYNC_URBS; i++) {
86e07d34 1124 struct snd_urb_ctx *u = &subs->syncurb[i];
1da177e4
LT		 1125 u->index = i;
1126 u->subs = subs;
ca81090a
CL		 1127 u->packets = 1;
1128 u->urb = usb_alloc_urb(1, GFP_KERNEL);
55851f73
CL		 1129 if (! u->urb)
1130 goto out_of_memory;
ca81090a 1131 u->urb->transfer_buffer = subs->syncbuf + i * 4;
55851f73 1132 u->urb->transfer_dma = subs->sync_dma + i * 4;
ca81090a 1133 u->urb->transfer_buffer_length = 4;
1da177e4 1134 u->urb->pipe = subs->syncpipe;
55851f73
CL		 1135 u->urb->transfer_flags = URB_ISO_ASAP |
1136 URB_NO_TRANSFER_DMA_MAP;
ca81090a 1137 u->urb->number_of_packets = 1;
1149a64f 1138 u->urb->interval = 1 << subs->syncinterval;
1da177e4 1139 u->urb->context = u;
3527a008 1140 u->urb->complete = snd_complete_sync_urb;
1da177e4
LT		 1141 }
1142 }
1143 return 0;
55851f73
CL		 1144
1145out_of_memory:
1146 release_substream_urbs(subs, 0);
1147 return -ENOMEM;
1da177e4
LT		 1148}
1149
1150
1151/*
1152 * find a matching audio format
1153 */
86e07d34 1154static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1da177e4
LT		 1155 unsigned int rate, unsigned int channels)
1156{
1157 struct list_head *p;
1158 struct audioformat *found = NULL;
1159 int cur_attr = 0, attr;
1160
1161 list_for_each(p, &subs->fmt_list) {
1162 struct audioformat *fp;
1163 fp = list_entry(p, struct audioformat, list);
1164 if (fp->format != format || fp->channels != channels)
1165 continue;
1166 if (rate < fp->rate_min || rate > fp->rate_max)
1167 continue;
1168 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1169 unsigned int i;
1170 for (i = 0; i < fp->nr_rates; i++)
1171 if (fp->rate_table[i] == rate)
1172 break;
1173 if (i >= fp->nr_rates)
1174 continue;
1175 }
1176 attr = fp->ep_attr & EP_ATTR_MASK;
1177 if (! found) {
1178 found = fp;
1179 cur_attr = attr;
1180 continue;
1181 }
1182 /* avoid async out and adaptive in if the other method
1183 * supports the same format.
1184 * this is a workaround for the case like
1185 * M-audio audiophile USB.
1186 */
1187 if (attr != cur_attr) {
1188 if ((attr == EP_ATTR_ASYNC &&
1189 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1190 (attr == EP_ATTR_ADAPTIVE &&
1191 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1192 continue;
1193 if ((cur_attr == EP_ATTR_ASYNC &&
1194 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1195 (cur_attr == EP_ATTR_ADAPTIVE &&
1196 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1197 found = fp;
1198 cur_attr = attr;
1199 continue;
1200 }
1201 }
1202 /* find the format with the largest max. packet size */
1203 if (fp->maxpacksize > found->maxpacksize) {
1204 found = fp;
1205 cur_attr = attr;
1206 }
1207 }
1208 return found;
1209}
1210
1211
1212/*
1213 * initialize the picth control and sample rate
1214 */
1215static int init_usb_pitch(struct usb_device *dev, int iface,
1216 struct usb_host_interface *alts,
1217 struct audioformat *fmt)
1218{
1219 unsigned int ep;
1220 unsigned char data[1];
1221 int err;
1222
1223 ep = get_endpoint(alts, 0)->bEndpointAddress;
1224 /* if endpoint has pitch control, enable it */
1225 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1226 data[0] = 1;
1227 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1228 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1229 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1230 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1231 dev->devnum, iface, ep);
1232 return err;
1233 }
1234 }
1235 return 0;
1236}
1237
1238static int init_usb_sample_rate(struct usb_device *dev, int iface,
1239 struct usb_host_interface *alts,
1240 struct audioformat *fmt, int rate)
1241{
1242 unsigned int ep;
1243 unsigned char data[3];
1244 int err;
1245
1246 ep = get_endpoint(alts, 0)->bEndpointAddress;
1247 /* if endpoint has sampling rate control, set it */
1248 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1249 int crate;
1250 data[0] = rate;
1251 data[1] = rate >> 8;
1252 data[2] = rate >> 16;
1253 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1254 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1255 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1256 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1257 dev->devnum, iface, fmt->altsetting, rate, ep);
1258 return err;
1259 }
1260 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1261 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1262 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1263 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1264 dev->devnum, iface, fmt->altsetting, ep);
1265 return 0; /* some devices don't support reading */
1266 }
1267 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1268 if (crate != rate) {
1269 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1270 // runtime->rate = crate;
1271 }
1272 }
1273 return 0;
1274}
1275
1276/*
1277 * find a matching format and set up the interface
1278 */
86e07d34 1279static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1da177e4
LT		 1280{
1281 struct usb_device *dev = subs->dev;
1282 struct usb_host_interface *alts;
1283 struct usb_interface_descriptor *altsd;
1284 struct usb_interface *iface;
1285 unsigned int ep, attr;
1286 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1287 int err;
1288
1289 iface = usb_ifnum_to_if(dev, fmt->iface);
1290 snd_assert(iface, return -EINVAL);
1291 alts = &iface->altsetting[fmt->altset_idx];
1292 altsd = get_iface_desc(alts);
1293 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1294
1295 if (fmt == subs->cur_audiofmt)
1296 return 0;
1297
1298 /* close the old interface */
1299 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1300 usb_set_interface(subs->dev, subs->interface, 0);
1301 subs->interface = -1;
1302 subs->format = 0;
1303 }
1304
1305 /* set interface */
1306 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1307 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1308 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1309 dev->devnum, fmt->iface, fmt->altsetting);
1310 return -EIO;
1311 }
1312 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1313 subs->interface = fmt->iface;
1314 subs->format = fmt->altset_idx;
1315 }
1316
1317 /* create a data pipe */
1318 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1319 if (is_playback)
1320 subs->datapipe = usb_sndisocpipe(dev, ep);
1321 else
1322 subs->datapipe = usb_rcvisocpipe(dev, ep);
573567e0
CL		 1323 if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1324 get_endpoint(alts, 0)->bInterval >= 1 &&
1325 get_endpoint(alts, 0)->bInterval <= 4)
1326 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1327 else
1328 subs->datainterval = 0;
1da177e4
LT		 1329 subs->syncpipe = subs->syncinterval = 0;
1330 subs->maxpacksize = fmt->maxpacksize;
1331 subs->fill_max = 0;
1332
1333 /* we need a sync pipe in async OUT or adaptive IN mode */
1334 /* check the number of EP, since some devices have broken
1335 * descriptors which fool us. if it has only one EP,
1336 * assume it as adaptive-out or sync-in.
1337 */
1338 attr = fmt->ep_attr & EP_ATTR_MASK;
1339 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1340 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1341 altsd->bNumEndpoints >= 2) {
1342 /* check sync-pipe endpoint */
1343 /* ... and check descriptor size before accessing bSynchAddress
1344 because there is a version of the SB Audigy 2 NX firmware lacking
1345 the audio fields in the endpoint descriptors */
1346 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1347 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1348 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1349 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1350 dev->devnum, fmt->iface, fmt->altsetting);
1351 return -EINVAL;
1352 }
1353 ep = get_endpoint(alts, 1)->bEndpointAddress;
1354 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1355 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1356 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1357 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1358 dev->devnum, fmt->iface, fmt->altsetting);
1359 return -EINVAL;
1360 }
1361 ep &= USB_ENDPOINT_NUMBER_MASK;
1362 if (is_playback)
1363 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1364 else
1365 subs->syncpipe = usb_sndisocpipe(dev, ep);
1149a64f
CL		 1366 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1367 get_endpoint(alts, 1)->bRefresh >= 1 &&
1368 get_endpoint(alts, 1)->bRefresh <= 9)
1369 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
604cf499 1370 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1149a64f 1371 subs->syncinterval = 1;
604cf499
CL		 1372 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1373 get_endpoint(alts, 1)->bInterval <= 16)
1374 subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1375 else
1376 subs->syncinterval = 3;
1da177e4
LT		 1377 }
1378
1379 /* always fill max packet size */
1380 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1381 subs->fill_max = 1;
1382
1383 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1384 return err;
1385
1386 subs->cur_audiofmt = fmt;
1387
1388#if 0
1389 printk("setting done: format = %d, rate = %d, channels = %d\n",
1390 fmt->format, fmt->rate, fmt->channels);
1391 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1392 subs->datapipe, subs->syncpipe);
1393#endif
1394
1395 return 0;
1396}
1397
1398/*
1399 * hw_params callback
1400 *
1401 * allocate a buffer and set the given audio format.
1402 *
1403 * so far we use a physically linear buffer although packetize transfer
1404 * doesn't need a continuous area.
1405 * if sg buffer is supported on the later version of alsa, we'll follow
1406 * that.
1407 */
86e07d34
TI		 1408static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1409 struct snd_pcm_hw_params *hw_params)
1da177e4 1410{
86e07d34 1411 struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
1da177e4
LT		 1412 struct audioformat *fmt;
1413 unsigned int channels, rate, format;
1414 int ret, changed;
1415
6207e51b
CL		 1416 ret = snd_pcm_alloc_vmalloc_buffer(substream,
1417 params_buffer_bytes(hw_params));
1da177e4
LT		 1418 if (ret < 0)
1419 return ret;
1420
1421 format = params_format(hw_params);
1422 rate = params_rate(hw_params);
1423 channels = params_channels(hw_params);
1424 fmt = find_format(subs, format, rate, channels);
1425 if (! fmt) {
21a3479a
JK		 1426 snd_printd(KERN_DEBUG "cannot set format: format = 0x%x, rate = %d, channels = %d\n",
1427 format, rate, channels);
1da177e4
LT		 1428 return -EINVAL;
1429 }
1430
1431 changed = subs->cur_audiofmt != fmt ||
1432 subs->period_bytes != params_period_bytes(hw_params) ||
1433 subs->cur_rate != rate;
1434 if ((ret = set_format(subs, fmt)) < 0)
1435 return ret;
1436
1437 if (subs->cur_rate != rate) {
1438 struct usb_host_interface *alts;
1439 struct usb_interface *iface;
1440 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1441 alts = &iface->altsetting[fmt->altset_idx];
1442 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1443 if (ret < 0)
1444 return ret;
1445 subs->cur_rate = rate;
1446 }
1447
1448 if (changed) {
1449 /* format changed */
1450 release_substream_urbs(subs, 0);
1451 /* influenced: period_bytes, channels, rate, format, */
1452 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1453 params_rate(hw_params),
1454 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1455 }
1456
1457 return ret;
1458}
1459
1460/*
1461 * hw_free callback
1462 *
1463 * reset the audio format and release the buffer
1464 */
86e07d34 1465static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1da177e4 1466{
86e07d34 1467 struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
1da177e4
LT		 1468
1469 subs->cur_audiofmt = NULL;
1470 subs->cur_rate = 0;
1471 subs->period_bytes = 0;
de1b8b93
TI		 1472 if (!subs->stream->chip->shutdown)
1473 release_substream_urbs(subs, 0);
6207e51b 1474 return snd_pcm_free_vmalloc_buffer(substream);
1da177e4
LT		 1475}
1476
1477/*
1478 * prepare callback
1479 *
1480 * only a few subtle things...
1481 */
86e07d34 1482static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 1483{
86e07d34
TI		 1484 struct snd_pcm_runtime *runtime = substream->runtime;
1485 struct snd_usb_substream *subs = runtime->private_data;
1da177e4
LT		 1486
1487 if (! subs->cur_audiofmt) {
1488 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1489 return -ENXIO;
1490 }
1491
1492 /* some unit conversions in runtime */
1493 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1494 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1495
1496 /* reset the pointer */
1da177e4 1497 subs->hwptr_done = 0;
1da177e4
LT		 1498 subs->transfer_done = 0;
1499 subs->phase = 0;
1500
1501 /* clear urbs (to be sure) */
1502 deactivate_urbs(subs, 0, 1);
1503 wait_clear_urbs(subs);
1504
b55bbf06
CL		 1505 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1506 * updates for all URBs would happen at the same time when starting */
1507 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1508 subs->ops.prepare = prepare_startup_playback_urb;
1509 return start_urbs(subs, runtime);
1510 } else
1511 return 0;
1da177e4
LT		 1512}
1513
86e07d34 1514static struct snd_pcm_hardware snd_usb_playback =
1da177e4 1515{
49045d3d
CL		 1516 .info = SNDRV_PCM_INFO_MMAP |
1517 SNDRV_PCM_INFO_MMAP_VALID |
1518 SNDRV_PCM_INFO_BATCH |
1519 SNDRV_PCM_INFO_INTERLEAVED |
1520 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1521 .buffer_bytes_max = 1024 * 1024,
1da177e4 1522 .period_bytes_min = 64,
d31cbbfd 1523 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1524 .periods_min = 2,
1525 .periods_max = 1024,
1526};
1527
86e07d34 1528static struct snd_pcm_hardware snd_usb_capture =
1da177e4 1529{
49045d3d
CL		 1530 .info = SNDRV_PCM_INFO_MMAP |
1531 SNDRV_PCM_INFO_MMAP_VALID |
1532 SNDRV_PCM_INFO_BATCH |
1533 SNDRV_PCM_INFO_INTERLEAVED |
1534 SNDRV_PCM_INFO_BLOCK_TRANSFER,
d31cbbfd 1535 .buffer_bytes_max = 1024 * 1024,
1da177e4 1536 .period_bytes_min = 64,
d31cbbfd 1537 .period_bytes_max = 512 * 1024,
1da177e4
LT		 1538 .periods_min = 2,
1539 .periods_max = 1024,
1540};
1541
1542/*
1543 * h/w constraints
1544 */
1545
1546#ifdef HW_CONST_DEBUG
1547#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1548#else
1549#define hwc_debug(fmt, args...) /**/
1550#endif
1551
86e07d34 1552static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
1da177e4 1553{
86e07d34
TI		 1554 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1555 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1556 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1557
1558 /* check the format */
1559 if (! snd_mask_test(fmts, fp->format)) {
1560 hwc_debug(" > check: no supported format %d\n", fp->format);
1561 return 0;
1562 }
1563 /* check the channels */
1564 if (fp->channels < ct->min || fp->channels > ct->max) {
1565 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1566 return 0;
1567 }
1568 /* check the rate is within the range */
1569 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1570 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1571 return 0;
1572 }
1573 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1574 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1575 return 0;
1576 }
1577 return 1;
1578}
1579
86e07d34
TI		 1580static int hw_rule_rate(struct snd_pcm_hw_params *params,
1581 struct snd_pcm_hw_rule *rule)
1da177e4 1582{
86e07d34 1583 struct snd_usb_substream *subs = rule->private;
1da177e4 1584 struct list_head *p;
86e07d34 1585 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1da177e4
LT		 1586 unsigned int rmin, rmax;
1587 int changed;
1588
1589 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1590 changed = 0;
1591 rmin = rmax = 0;
1592 list_for_each(p, &subs->fmt_list) {
1593 struct audioformat *fp;
1594 fp = list_entry(p, struct audioformat, list);
1595 if (! hw_check_valid_format(params, fp))
1596 continue;
1597 if (changed++) {
1598 if (rmin > fp->rate_min)
1599 rmin = fp->rate_min;
1600 if (rmax < fp->rate_max)
1601 rmax = fp->rate_max;
1602 } else {
1603 rmin = fp->rate_min;
1604 rmax = fp->rate_max;
1605 }
1606 }
1607
1608 if (! changed) {
1609 hwc_debug(" --> get empty\n");
1610 it->empty = 1;
1611 return -EINVAL;
1612 }
1613
1614 changed = 0;
1615 if (it->min < rmin) {
1616 it->min = rmin;
1617 it->openmin = 0;
1618 changed = 1;
1619 }
1620 if (it->max > rmax) {
1621 it->max = rmax;
1622 it->openmax = 0;
1623 changed = 1;
1624 }
1625 if (snd_interval_checkempty(it)) {
1626 it->empty = 1;
1627 return -EINVAL;
1628 }
1629 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1630 return changed;
1631}
1632
1633
86e07d34
TI		 1634static int hw_rule_channels(struct snd_pcm_hw_params *params,
1635 struct snd_pcm_hw_rule *rule)
1da177e4 1636{
86e07d34 1637 struct snd_usb_substream *subs = rule->private;
1da177e4 1638 struct list_head *p;
86e07d34 1639 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1da177e4
LT		 1640 unsigned int rmin, rmax;
1641 int changed;
1642
1643 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1644 changed = 0;
1645 rmin = rmax = 0;
1646 list_for_each(p, &subs->fmt_list) {
1647 struct audioformat *fp;
1648 fp = list_entry(p, struct audioformat, list);
1649 if (! hw_check_valid_format(params, fp))
1650 continue;
1651 if (changed++) {
1652 if (rmin > fp->channels)
1653 rmin = fp->channels;
1654 if (rmax < fp->channels)
1655 rmax = fp->channels;
1656 } else {
1657 rmin = fp->channels;
1658 rmax = fp->channels;
1659 }
1660 }
1661
1662 if (! changed) {
1663 hwc_debug(" --> get empty\n");
1664 it->empty = 1;
1665 return -EINVAL;
1666 }
1667
1668 changed = 0;
1669 if (it->min < rmin) {
1670 it->min = rmin;
1671 it->openmin = 0;
1672 changed = 1;
1673 }
1674 if (it->max > rmax) {
1675 it->max = rmax;
1676 it->openmax = 0;
1677 changed = 1;
1678 }
1679 if (snd_interval_checkempty(it)) {
1680 it->empty = 1;
1681 return -EINVAL;
1682 }
1683 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1684 return changed;
1685}
1686
86e07d34
TI		 1687static int hw_rule_format(struct snd_pcm_hw_params *params,
1688 struct snd_pcm_hw_rule *rule)
1da177e4 1689{
86e07d34 1690 struct snd_usb_substream *subs = rule->private;
1da177e4 1691 struct list_head *p;
86e07d34 1692 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1da177e4
LT		 1693 u64 fbits;
1694 u32 oldbits[2];
1695 int changed;
1696
1697 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1698 fbits = 0;
1699 list_for_each(p, &subs->fmt_list) {
1700 struct audioformat *fp;
1701 fp = list_entry(p, struct audioformat, list);
1702 if (! hw_check_valid_format(params, fp))
1703 continue;
1704 fbits |= (1ULL << fp->format);
1705 }
1706
1707 oldbits[0] = fmt->bits[0];
1708 oldbits[1] = fmt->bits[1];
1709 fmt->bits[0] &= (u32)fbits;
1710 fmt->bits[1] &= (u32)(fbits >> 32);
1711 if (! fmt->bits[0] && ! fmt->bits[1]) {
1712 hwc_debug(" --> get empty\n");
1713 return -EINVAL;
1714 }
1715 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1716 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1717 return changed;
1718}
1719
1720#define MAX_MASK 64
1721
1722/*
1723 * check whether the registered audio formats need special hw-constraints
1724 */
86e07d34 1725static int check_hw_params_convention(struct snd_usb_substream *subs)
1da177e4
LT		 1726{
1727 int i;
1728 u32 *channels;
1729 u32 *rates;
1730 u32 cmaster, rmaster;
1731 u32 rate_min = 0, rate_max = 0;
1732 struct list_head *p;
1733 int err = 1;
1734
1735 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1736 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1737
1738 list_for_each(p, &subs->fmt_list) {
1739 struct audioformat *f;
1740 f = list_entry(p, struct audioformat, list);
1741 /* unconventional channels? */
1742 if (f->channels > 32)
1743 goto __out;
1744 /* continuous rate min/max matches? */
1745 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1746 if (rate_min && f->rate_min != rate_min)
1747 goto __out;
1748 if (rate_max && f->rate_max != rate_max)
1749 goto __out;
1750 rate_min = f->rate_min;
1751 rate_max = f->rate_max;
1752 }
1753 /* combination of continuous rates and fixed rates? */
1754 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1755 if (f->rates != rates[f->format])
1756 goto __out;
1757 }
1758 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1759 if (rates[f->format] && rates[f->format] != f->rates)
1760 goto __out;
1761 }
1762 channels[f->format] |= (1 << f->channels);
1763 rates[f->format] |= f->rates;
a79eee8d
LR		 1764 /* needs knot? */
1765 if (f->needs_knot)
1766 goto __out;
1da177e4
LT		 1767 }
1768 /* check whether channels and rates match for all formats */
1769 cmaster = rmaster = 0;
1770 for (i = 0; i < MAX_MASK; i++) {
1771 if (cmaster != channels[i] && cmaster && channels[i])
1772 goto __out;
1773 if (rmaster != rates[i] && rmaster && rates[i])
1774 goto __out;
1775 if (channels[i])
1776 cmaster = channels[i];
1777 if (rates[i])
1778 rmaster = rates[i];
1779 }
1780 /* check whether channels match for all distinct rates */
1781 memset(channels, 0, MAX_MASK * sizeof(u32));
1782 list_for_each(p, &subs->fmt_list) {
1783 struct audioformat *f;
1784 f = list_entry(p, struct audioformat, list);
1785 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1786 continue;
1787 for (i = 0; i < 32; i++) {
1788 if (f->rates & (1 << i))
1789 channels[i] |= (1 << f->channels);
1790 }
1791 }
1792 cmaster = 0;
1793 for (i = 0; i < 32; i++) {
1794 if (cmaster != channels[i] && cmaster && channels[i])
1795 goto __out;
1796 if (channels[i])
1797 cmaster = channels[i];
1798 }
1799 err = 0;
1800
1801 __out:
1802 kfree(channels);
1803 kfree(rates);
1804 return err;
1805}
1806
a79eee8d
LR		 1807/*
1808 * If the device supports unusual bit rates, does the request meet these?
1809 */
1810static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1811 struct snd_usb_substream *subs)
1812{
1813 struct list_head *p;
1814 struct snd_pcm_hw_constraint_list constraints_rates;
1815 int err;
1816
1817 list_for_each(p, &subs->fmt_list) {
1818 struct audioformat *fp;
1819 fp = list_entry(p, struct audioformat, list);
1820
1821 if (!fp->needs_knot)
1822 continue;
1823
1824 constraints_rates.count = fp->nr_rates;
1825 constraints_rates.list = fp->rate_table;
1826 constraints_rates.mask = 0;
1827
1828 err = snd_pcm_hw_constraint_list(runtime, 0,
1829 SNDRV_PCM_HW_PARAM_RATE,
1830 &constraints_rates);
1831
1832 if (err < 0)
1833 return err;
1834 }
1835
1836 return 0;
1837}
1838
1da177e4
LT		 1839
1840/*
1841 * set up the runtime hardware information.
1842 */
1843
86e07d34 1844static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1da177e4
LT		 1845{
1846 struct list_head *p;
1847 int err;
1848
1849 runtime->hw.formats = subs->formats;
1850
1851 runtime->hw.rate_min = 0x7fffffff;
1852 runtime->hw.rate_max = 0;
1853 runtime->hw.channels_min = 256;
1854 runtime->hw.channels_max = 0;
1855 runtime->hw.rates = 0;
1856 /* check min/max rates and channels */
1857 list_for_each(p, &subs->fmt_list) {
1858 struct audioformat *fp;
1859 fp = list_entry(p, struct audioformat, list);
1860 runtime->hw.rates |= fp->rates;
1861 if (runtime->hw.rate_min > fp->rate_min)
1862 runtime->hw.rate_min = fp->rate_min;
1863 if (runtime->hw.rate_max < fp->rate_max)
1864 runtime->hw.rate_max = fp->rate_max;
1865 if (runtime->hw.channels_min > fp->channels)
1866 runtime->hw.channels_min = fp->channels;
1867 if (runtime->hw.channels_max < fp->channels)
1868 runtime->hw.channels_max = fp->channels;
1869 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1870 /* FIXME: there might be more than one audio formats... */
1871 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1872 fp->frame_size;
1873 }
1874 }
1875
1876 /* set the period time minimum 1ms */
1877 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1878 1000 * MIN_PACKS_URB,
1879 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1880
1881 if (check_hw_params_convention(subs)) {
1882 hwc_debug("setting extra hw constraints...\n");
1883 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1884 hw_rule_rate, subs,
1885 SNDRV_PCM_HW_PARAM_FORMAT,
1886 SNDRV_PCM_HW_PARAM_CHANNELS,
1887 -1)) < 0)
1888 return err;
1889 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1890 hw_rule_channels, subs,
1891 SNDRV_PCM_HW_PARAM_FORMAT,
1892 SNDRV_PCM_HW_PARAM_RATE,
1893 -1)) < 0)
1894 return err;
1895 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1896 hw_rule_format, subs,
1897 SNDRV_PCM_HW_PARAM_RATE,
1898 SNDRV_PCM_HW_PARAM_CHANNELS,
1899 -1)) < 0)
1900 return err;
a79eee8d
LR		 1901 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
1902 return err;
1da177e4
LT		 1903 }
1904 return 0;
1905}
1906
86e07d34
TI		 1907static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction,
1908 struct snd_pcm_hardware *hw)
1da177e4 1909{
86e07d34
TI		 1910 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1911 struct snd_pcm_runtime *runtime = substream->runtime;
1912 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1913
1914 subs->interface = -1;
1915 subs->format = 0;
1916 runtime->hw = *hw;
1917 runtime->private_data = subs;
1918 subs->pcm_substream = substream;
1919 return setup_hw_info(runtime, subs);
1920}
1921
86e07d34 1922static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1da177e4 1923{
86e07d34
TI		 1924 struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1925 struct snd_usb_substream *subs = &as->substream[direction];
1da177e4
LT		 1926
1927 if (subs->interface >= 0) {
1928 usb_set_interface(subs->dev, subs->interface, 0);
1929 subs->interface = -1;
1930 }
1931 subs->pcm_substream = NULL;
1932 return 0;
1933}
1934
86e07d34 1935static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1da177e4
LT		 1936{
1937 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1938}
1939
86e07d34 1940static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1941{
1942 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1943}
1944
86e07d34 1945static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1da177e4
LT		 1946{
1947 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1948}
1949
86e07d34 1950static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1da177e4
LT		 1951{
1952 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1953}
1954
86e07d34 1955static struct snd_pcm_ops snd_usb_playback_ops = {
1da177e4
LT		 1956 .open = snd_usb_playback_open,
1957 .close = snd_usb_playback_close,
1958 .ioctl = snd_pcm_lib_ioctl,
1959 .hw_params = snd_usb_hw_params,
1960 .hw_free = snd_usb_hw_free,
1961 .prepare = snd_usb_pcm_prepare,
b55bbf06 1962 .trigger = snd_usb_pcm_playback_trigger,
1da177e4 1963 .pointer = snd_usb_pcm_pointer,
6207e51b 1964 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1965};
1966
86e07d34 1967static struct snd_pcm_ops snd_usb_capture_ops = {
1da177e4
LT		 1968 .open = snd_usb_capture_open,
1969 .close = snd_usb_capture_close,
1970 .ioctl = snd_pcm_lib_ioctl,
1971 .hw_params = snd_usb_hw_params,
1972 .hw_free = snd_usb_hw_free,
1973 .prepare = snd_usb_pcm_prepare,
b55bbf06 1974 .trigger = snd_usb_pcm_capture_trigger,
1da177e4 1975 .pointer = snd_usb_pcm_pointer,
6207e51b 1976 .page = snd_pcm_get_vmalloc_page,
1da177e4
LT		 1977};
1978
1979
1980
1981/*
1982 * helper functions
1983 */
1984
1985/*
1986 * combine bytes and get an integer value
1987 */
1988unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1989{
1990 switch (size) {
1991 case 1: return *bytes;
1992 case 2: return combine_word(bytes);
1993 case 3: return combine_triple(bytes);
1994 case 4: return combine_quad(bytes);
1995 default: return 0;
1996 }
1997}
1998
1999/*
2000 * parse descriptor buffer and return the pointer starting the given
2001 * descriptor type.
2002 */
2003void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
2004{
2005 u8 *p, *end, *next;
2006
2007 p = descstart;
2008 end = p + desclen;
2009 for (; p < end;) {
2010 if (p[0] < 2)
2011 return NULL;
2012 next = p + p[0];
2013 if (next > end)
2014 return NULL;
2015 if (p[1] == dtype && (!after || (void *)p > after)) {
2016 return p;
2017 }
2018 p = next;
2019 }
2020 return NULL;
2021}
2022
2023/*
2024 * find a class-specified interface descriptor with the given subtype.
2025 */
2026void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
2027{
2028 unsigned char *p = after;
2029
2030 while ((p = snd_usb_find_desc(buffer, buflen, p,
2031 USB_DT_CS_INTERFACE)) != NULL) {
2032 if (p[0] >= 3 && p[2] == dsubtype)
2033 return p;
2034 }
2035 return NULL;
2036}
2037
2038/*
2039 * Wrapper for usb_control_msg().
2040 * Allocates a temp buffer to prevent dmaing from/to the stack.
2041 */
2042int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
2043 __u8 requesttype, __u16 value, __u16 index, void *data,
2044 __u16 size, int timeout)
2045{
2046 int err;
2047 void *buf = NULL;
2048
2049 if (size > 0) {
52978be6 2050 buf = kmemdup(data, size, GFP_KERNEL);
1da177e4
LT		 2051 if (!buf)
2052 return -ENOMEM;
1da177e4
LT		 2053 }
2054 err = usb_control_msg(dev, pipe, request, requesttype,
2055 value, index, buf, size, timeout);
2056 if (size > 0) {
2057 memcpy(data, buf, size);
2058 kfree(buf);
2059 }
2060 return err;
2061}
2062
2063
2064/*
2065 * entry point for linux usb interface
2066 */
2067
2068static int usb_audio_probe(struct usb_interface *intf,
2069 const struct usb_device_id *id);
2070static void usb_audio_disconnect(struct usb_interface *intf);
2071
2072static struct usb_device_id usb_audio_ids [] = {
2073#include "usbquirks.h"
2074 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2075 .bInterfaceClass = USB_CLASS_AUDIO,
2076 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
2077 { } /* Terminating entry */
2078};
2079
2080MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2081
2082static struct usb_driver usb_audio_driver = {
1da177e4
LT		 2083 .name = "snd-usb-audio",
2084 .probe = usb_audio_probe,
2085 .disconnect = usb_audio_disconnect,
2086 .id_table = usb_audio_ids,
2087};
2088
2089
727f317a 2090#if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
21a3479a 2091
1da177e4
LT		 2092/*
2093 * proc interface for list the supported pcm formats
2094 */
86e07d34 2095static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2096{
2097 struct list_head *p;
2098 static char *sync_types[4] = {
2099 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2100 };
2101
2102 list_for_each(p, &subs->fmt_list) {
2103 struct audioformat *fp;
2104 fp = list_entry(p, struct audioformat, list);
2105 snd_iprintf(buffer, " Interface %d\n", fp->iface);
2106 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
3f72a30c 2107 snd_iprintf(buffer, " Format: 0x%x\n", fp->format);
1da177e4
LT		 2108 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
2109 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
2110 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2111 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2112 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2113 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2114 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
2115 fp->rate_min, fp->rate_max);
2116 } else {
2117 unsigned int i;
2118 snd_iprintf(buffer, " Rates: ");
2119 for (i = 0; i < fp->nr_rates; i++) {
2120 if (i > 0)
2121 snd_iprintf(buffer, ", ");
2122 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2123 }
2124 snd_iprintf(buffer, "\n");
2125 }
2126 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2127 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2128 }
2129}
2130
86e07d34 2131static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
1da177e4
LT		 2132{
2133 if (subs->running) {
2134 unsigned int i;
2135 snd_iprintf(buffer, " Status: Running\n");
2136 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
2137 snd_iprintf(buffer, " Altset = %d\n", subs->format);
2138 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
2139 for (i = 0; i < subs->nurbs; i++)
2140 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2141 snd_iprintf(buffer, "]\n");
2142 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
08fe1589 2143 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1da177e4
LT		 2144 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2145 ? get_full_speed_hz(subs->freqm)
08fe1589
CL		 2146 : get_high_speed_hz(subs->freqm),
2147 subs->freqm >> 16, subs->freqm & 0xffff);
1da177e4
LT		 2148 } else {
2149 snd_iprintf(buffer, " Status: Stop\n");
2150 }
2151}
2152
86e07d34 2153static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 2154{
86e07d34 2155 struct snd_usb_stream *stream = entry->private_data;
1da177e4
LT		 2156
2157 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2158
2159 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2160 snd_iprintf(buffer, "\nPlayback:\n");
2161 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2162 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2163 }
2164 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2165 snd_iprintf(buffer, "\nCapture:\n");
2166 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2167 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2168 }
2169}
2170
86e07d34 2171static void proc_pcm_format_add(struct snd_usb_stream *stream)
1da177e4 2172{
86e07d34 2173 struct snd_info_entry *entry;
1da177e4 2174 char name[32];
86e07d34 2175 struct snd_card *card = stream->chip->card;
1da177e4
LT		 2176
2177 sprintf(name, "stream%d", stream->pcm_index);
2178 if (! snd_card_proc_new(card, name, &entry))
bf850204 2179 snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
1da177e4
LT		 2180}
2181
21a3479a
JK		 2182#else
2183
2184static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
2185{
2186}
2187
2188#endif
1da177e4
LT		 2189
2190/*
2191 * initialize the substream instance.
2192 */
2193
86e07d34 2194static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
1da177e4 2195{
86e07d34 2196 struct snd_usb_substream *subs = &as->substream[stream];
1da177e4
LT		 2197
2198 INIT_LIST_HEAD(&subs->fmt_list);
2199 spin_lock_init(&subs->lock);
2200
2201 subs->stream = as;
2202 subs->direction = stream;
2203 subs->dev = as->chip->dev;
2204 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2205 subs->ops = audio_urb_ops[stream];
2206 else
2207 subs->ops = audio_urb_ops_high_speed[stream];
1da177e4
LT		 2208 snd_pcm_set_ops(as->pcm, stream,
2209 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2210 &snd_usb_playback_ops : &snd_usb_capture_ops);
2211
2212 list_add_tail(&fp->list, &subs->fmt_list);
2213 subs->formats |= 1ULL << fp->format;
2214 subs->endpoint = fp->endpoint;
2215 subs->num_formats++;
2216 subs->fmt_type = fp->fmt_type;
2217}
2218
2219
2220/*
2221 * free a substream
2222 */
86e07d34 2223static void free_substream(struct snd_usb_substream *subs)
1da177e4
LT		 2224{
2225 struct list_head *p, *n;
2226
2227 if (! subs->num_formats)
2228 return; /* not initialized */
2229 list_for_each_safe(p, n, &subs->fmt_list) {
2230 struct audioformat *fp = list_entry(p, struct audioformat, list);
2231 kfree(fp->rate_table);
2232 kfree(fp);
2233 }
2234}
2235
2236
2237/*
2238 * free a usb stream instance
2239 */
86e07d34 2240static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
1da177e4
LT		 2241{
2242 free_substream(&stream->substream[0]);
2243 free_substream(&stream->substream[1]);
2244 list_del(&stream->list);
2245 kfree(stream);
2246}
2247
86e07d34 2248static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
1da177e4 2249{
86e07d34 2250 struct snd_usb_stream *stream = pcm->private_data;
1da177e4
LT		 2251 if (stream) {
2252 stream->pcm = NULL;
1da177e4
LT		 2253 snd_usb_audio_stream_free(stream);
2254 }
2255}
2256
2257
2258/*
2259 * add this endpoint to the chip instance.
2260 * if a stream with the same endpoint already exists, append to it.
2261 * if not, create a new pcm stream.
2262 */
86e07d34 2263static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
1da177e4
LT		 2264{
2265 struct list_head *p;
86e07d34
TI		 2266 struct snd_usb_stream *as;
2267 struct snd_usb_substream *subs;
2268 struct snd_pcm *pcm;
1da177e4
LT		 2269 int err;
2270
2271 list_for_each(p, &chip->pcm_list) {
86e07d34 2272 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2273 if (as->fmt_type != fp->fmt_type)
2274 continue;
2275 subs = &as->substream[stream];
2276 if (! subs->endpoint)
2277 continue;
2278 if (subs->endpoint == fp->endpoint) {
2279 list_add_tail(&fp->list, &subs->fmt_list);
2280 subs->num_formats++;
2281 subs->formats |= 1ULL << fp->format;
2282 return 0;
2283 }
2284 }
2285 /* look for an empty stream */
2286 list_for_each(p, &chip->pcm_list) {
86e07d34 2287 as = list_entry(p, struct snd_usb_stream, list);
1da177e4
LT		 2288 if (as->fmt_type != fp->fmt_type)
2289 continue;
2290 subs = &as->substream[stream];
2291 if (subs->endpoint)
2292 continue;
2293 err = snd_pcm_new_stream(as->pcm, stream, 1);
2294 if (err < 0)
2295 return err;
2296 init_substream(as, stream, fp);
2297 return 0;
2298 }
2299
2300 /* create a new pcm */
59feddb2 2301 as = kzalloc(sizeof(*as), GFP_KERNEL);
1da177e4
LT		 2302 if (! as)
2303 return -ENOMEM;
1da177e4
LT		 2304 as->pcm_index = chip->pcm_devs;
2305 as->chip = chip;
2306 as->fmt_type = fp->fmt_type;
2307 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2308 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2309 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2310 &pcm);
2311 if (err < 0) {
2312 kfree(as);
2313 return err;
2314 }
2315 as->pcm = pcm;
2316 pcm->private_data = as;
2317 pcm->private_free = snd_usb_audio_pcm_free;
2318 pcm->info_flags = 0;
2319 if (chip->pcm_devs > 0)
2320 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2321 else
2322 strcpy(pcm->name, "USB Audio");
2323
2324 init_substream(as, stream, fp);
2325
2326 list_add(&as->list, &chip->pcm_list);
2327 chip->pcm_devs++;
2328
2329 proc_pcm_format_add(as);
2330
2331 return 0;
2332}
2333
2334
2335/*
2336 * check if the device uses big-endian samples
2337 */
86e07d34 2338static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
1da177e4 2339{
27d10f56
CL		 2340 switch (chip->usb_id) {
2341 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2342 if (fp->endpoint & USB_DIR_IN)
1da177e4 2343 return 1;
27d10f56
CL		 2344 break;
2345 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2346 return 1;
1da177e4
LT		 2347 }
2348 return 0;
2349}
2350
2351/*
2352 * parse the audio format type I descriptor
2353 * and returns the corresponding pcm format
2354 *
2355 * @dev: usb device
2356 * @fp: audioformat record
2357 * @format: the format tag (wFormatTag)
2358 * @fmt: the format type descriptor
2359 */
86e07d34 2360static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2361 int format, unsigned char *fmt)
2362{
2363 int pcm_format;
2364 int sample_width, sample_bytes;
2365
2366 /* FIXME: correct endianess and sign? */
2367 pcm_format = -1;
2368 sample_width = fmt[6];
2369 sample_bytes = fmt[5];
2370 switch (format) {
2371 case 0: /* some devices don't define this correctly... */
2372 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
27d10f56 2373 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2374 /* fall-through */
2375 case USB_AUDIO_FORMAT_PCM:
2376 if (sample_width > sample_bytes * 8) {
2377 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
27d10f56 2378 chip->dev->devnum, fp->iface, fp->altsetting,
1da177e4
LT		 2379 sample_width, sample_bytes);
2380 }
2381 /* check the format byte size */
2382 switch (fmt[5]) {
2383 case 1:
2384 pcm_format = SNDRV_PCM_FORMAT_S8;
2385 break;
2386 case 2:
27d10f56 2387 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2388 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2389 else
2390 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2391 break;
2392 case 3:
27d10f56 2393 if (is_big_endian_format(chip, fp))
1da177e4
LT		 2394 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2395 else
2396 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2397 break;
2398 case 4:
2399 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2400 break;
2401 default:
2402 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
27d10f56
CL		 2403 chip->dev->devnum, fp->iface,
2404 fp->altsetting, sample_width, sample_bytes);
1da177e4
LT		 2405 break;
2406 }
2407 break;
2408 case USB_AUDIO_FORMAT_PCM8:
2409 /* Dallas DS4201 workaround */
27d10f56 2410 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
1da177e4
LT		 2411 pcm_format = SNDRV_PCM_FORMAT_S8;
2412 else
2413 pcm_format = SNDRV_PCM_FORMAT_U8;
2414 break;
2415 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2416 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2417 break;
2418 case USB_AUDIO_FORMAT_ALAW:
2419 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2420 break;
2421 case USB_AUDIO_FORMAT_MU_LAW:
2422 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2423 break;
2424 default:
2425 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
27d10f56 2426 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2427 break;
2428 }
2429 return pcm_format;
2430}
2431
2432
2433/*
2434 * parse the format descriptor and stores the possible sample rates
2435 * on the audioformat table.
2436 *
2437 * @dev: usb device
2438 * @fp: audioformat record
2439 * @fmt: the format descriptor
2440 * @offset: the start offset of descriptor pointing the rate type
2441 * (7 for type I and II, 8 for type II)
2442 */
86e07d34 2443static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2444 unsigned char *fmt, int offset)
2445{
2446 int nr_rates = fmt[offset];
a79eee8d 2447 int found;
1da177e4
LT		 2448 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2449 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
27d10f56 2450 chip->dev->devnum, fp->iface, fp->altsetting);
1da177e4
LT		 2451 return -1;
2452 }
2453
2454 if (nr_rates) {
2455 /*
2456 * build the rate table and bitmap flags
2457 */
2458 int r, idx, c;
2459 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2460 static unsigned int conv_rates[] = {
2461 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2462 64000, 88200, 96000, 176400, 192000
2463 };
2464 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2465 if (fp->rate_table == NULL) {
2466 snd_printk(KERN_ERR "cannot malloc\n");
2467 return -1;
2468 }
2469
a79eee8d 2470 fp->needs_knot = 0;
1da177e4
LT		 2471 fp->nr_rates = nr_rates;
2472 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2473 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
987411b7
CL		 2474 unsigned int rate = combine_triple(&fmt[idx]);
2475 /* C-Media CM6501 mislabels its 96 kHz altsetting */
2476 if (rate == 48000 && nr_rates == 1 &&
2477 chip->usb_id == USB_ID(0x0d8c, 0x0201) &&
2478 fp->altsetting == 5 && fp->maxpacksize == 392)
2479 rate = 96000;
2480 fp->rate_table[r] = rate;
1da177e4
LT		 2481 if (rate < fp->rate_min)
2482 fp->rate_min = rate;
2483 else if (rate > fp->rate_max)
2484 fp->rate_max = rate;
a79eee8d 2485 found = 0;
1da177e4
LT		 2486 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2487 if (rate == conv_rates[c]) {
a79eee8d 2488 found = 1;
1da177e4
LT		 2489 fp->rates |= (1 << c);
2490 break;
2491 }
2492 }
a79eee8d
LR		 2493 if (!found)
2494 fp->needs_knot = 1;
1da177e4 2495 }
a79eee8d
LR		 2496 if (fp->needs_knot)
2497 fp->rates |= SNDRV_PCM_RATE_KNOT;
1da177e4
LT		 2498 } else {
2499 /* continuous rates */
2500 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2501 fp->rate_min = combine_triple(&fmt[offset + 1]);
2502 fp->rate_max = combine_triple(&fmt[offset + 4]);
2503 }
2504 return 0;
2505}
2506
2507/*
2508 * parse the format type I and III descriptors
2509 */
86e07d34 2510static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2511 int format, unsigned char *fmt)
2512{
2513 int pcm_format;
2514
2515 if (fmt[3] == USB_FORMAT_TYPE_III) {
2516 /* FIXME: the format type is really IECxxx
2517 * but we give normal PCM format to get the existing
2518 * apps working...
2519 */
2520 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2521 } else {
27d10f56 2522 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
1da177e4
LT		 2523 if (pcm_format < 0)
2524 return -1;
2525 }
2526 fp->format = pcm_format;
2527 fp->channels = fmt[4];
2528 if (fp->channels < 1) {
2529 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
27d10f56 2530 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
1da177e4
LT		 2531 return -1;
2532 }
27d10f56 2533 return parse_audio_format_rates(chip, fp, fmt, 7);
1da177e4
LT		 2534}
2535
2536/*
2537 * prase the format type II descriptor
2538 */
86e07d34 2539static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2540 int format, unsigned char *fmt)
2541{
2542 int brate, framesize;
2543 switch (format) {
2544 case USB_AUDIO_FORMAT_AC3:
2545 /* FIXME: there is no AC3 format defined yet */
2546 // fp->format = SNDRV_PCM_FORMAT_AC3;
2547 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2548 break;
2549 case USB_AUDIO_FORMAT_MPEG:
2550 fp->format = SNDRV_PCM_FORMAT_MPEG;
2551 break;
2552 default:
2553 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
27d10f56 2554 chip->dev->devnum, fp->iface, fp->altsetting, format);
1da177e4
LT		 2555 fp->format = SNDRV_PCM_FORMAT_MPEG;
2556 break;
2557 }
2558 fp->channels = 1;
2559 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2560 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2561 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2562 fp->frame_size = framesize;
27d10f56 2563 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
1da177e4
LT		 2564}
2565
86e07d34 2566static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
1da177e4
LT		 2567 int format, unsigned char *fmt, int stream)
2568{
2569 int err;
2570
2571 switch (fmt[3]) {
2572 case USB_FORMAT_TYPE_I:
2573 case USB_FORMAT_TYPE_III:
27d10f56 2574 err = parse_audio_format_i(chip, fp, format, fmt);
1da177e4
LT		 2575 break;
2576 case USB_FORMAT_TYPE_II:
27d10f56 2577 err = parse_audio_format_ii(chip, fp, format, fmt);
1da177e4
LT		 2578 break;
2579 default:
2580 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
27d10f56 2581 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
1da177e4
LT		 2582 return -1;
2583 }
2584 fp->fmt_type = fmt[3];
2585 if (err < 0)
2586 return err;
2587#if 1
33159378 2588 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
1da177e4
LT		 2589 /* extigy apparently supports sample rates other than 48k
2590 * but not in ordinary way. so we enable only 48k atm.
2591 */
27d10f56 2592 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
33159378
CL		 2593 chip->usb_id == USB_ID(0x041e, 0x3020) ||
2594 chip->usb_id == USB_ID(0x041e, 0x3061)) {
1da177e4 2595 if (fmt[3] == USB_FORMAT_TYPE_I &&
8c1872dc
CL		 2596 fp->rates != SNDRV_PCM_RATE_48000 &&
2597 fp->rates != SNDRV_PCM_RATE_96000)
b4d3f9d4 2598 return -1;
1da177e4
LT		 2599 }
2600#endif
2601 return 0;
2602}
2603
e311334e
TLM		 2604static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
2605 int iface, int altno);
86e07d34 2606static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
1da177e4
LT		 2607{
2608 struct usb_device *dev;
2609 struct usb_interface *iface;
2610 struct usb_host_interface *alts;
2611 struct usb_interface_descriptor *altsd;
2612 int i, altno, err, stream;
2613 int format;
2614 struct audioformat *fp;
2615 unsigned char *fmt, *csep;
2616
2617 dev = chip->dev;
2618
2619 /* parse the interface's altsettings */
2620 iface = usb_ifnum_to_if(dev, iface_no);
2621 for (i = 0; i < iface->num_altsetting; i++) {
2622 alts = &iface->altsetting[i];
2623 altsd = get_iface_desc(alts);
2624 /* skip invalid one */
2625 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2626 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2627 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2628 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2629 altsd->bNumEndpoints < 1 ||
2630 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2631 continue;
2632 /* must be isochronous */
2633 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2634 USB_ENDPOINT_XFER_ISOC)
2635 continue;
2636 /* check direction */
2637 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2638 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2639 altno = altsd->bAlternateSetting;
e311334e
TLM		 2640
2641 /* audiophile usb: skip altsets incompatible with device_setup
2642 */
2643 if (chip->usb_id == USB_ID(0x0763, 0x2003) &&
2644 audiophile_skip_setting_quirk(chip, iface_no, altno))
2645 continue;
1da177e4
LT		 2646
2647 /* get audio formats */
2648 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2649 if (!fmt) {
2650 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2651 dev->devnum, iface_no, altno);
2652 continue;
2653 }
2654
2655 if (fmt[0] < 7) {
2656 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2657 dev->devnum, iface_no, altno);
2658 continue;
2659 }
2660
2661 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2662
2663 /* get format type */
2664 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2665 if (!fmt) {
2666 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2667 dev->devnum, iface_no, altno);
2668 continue;
2669 }
2670 if (fmt[0] < 8) {
2671 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2672 dev->devnum, iface_no, altno);
2673 continue;
2674 }
2675
2676 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2677 /* Creamware Noah has this descriptor after the 2nd endpoint */
2678 if (!csep && altsd->bNumEndpoints >= 2)
2679 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2680 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
f8c75790 2681 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
faf8d117 2682 " class specific endpoint descriptor\n",
1da177e4 2683 dev->devnum, iface_no, altno);
faf8d117 2684 csep = NULL;
1da177e4
LT		 2685 }
2686
59feddb2 2687 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 2688 if (! fp) {
2689 snd_printk(KERN_ERR "cannot malloc\n");
2690 return -ENOMEM;
2691 }
2692
1da177e4
LT		 2693 fp->iface = iface_no;
2694 fp->altsetting = altno;
2695 fp->altset_idx = i;
2696 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2697 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
1da177e4 2698 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
573567e0
CL		 2699 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2700 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2701 * (fp->maxpacksize & 0x7ff);
faf8d117 2702 fp->attributes = csep ? csep[3] : 0;
1da177e4
LT		 2703
2704 /* some quirks for attributes here */
2705
c3f93297
CL		 2706 switch (chip->usb_id) {
2707 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
1da177e4
LT		 2708 /* Optoplay sets the sample rate attribute although
2709 * it seems not supporting it in fact.
2710 */
2711 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2712 break;
2713 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2714 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
1da177e4
LT		 2715 /* doesn't set the sample rate attribute, but supports it */
2716 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
c3f93297
CL		 2717 break;
2718 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2719 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2720 an older model 77d:223) */
1da177e4
LT		 2721 /*
2722 * plantronics headset and Griffin iMic have set adaptive-in
2723 * although it's really not...
2724 */
1da177e4
LT		 2725 fp->ep_attr &= ~EP_ATTR_MASK;
2726 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2727 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2728 else
2729 fp->ep_attr |= EP_ATTR_SYNC;
c3f93297 2730 break;
1da177e4
LT		 2731 }
2732
2733 /* ok, let's parse further... */
27d10f56 2734 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
1da177e4
LT		 2735 kfree(fp->rate_table);
2736 kfree(fp);
2737 continue;
2738 }
2739
e311334e 2740 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, altno, fp->endpoint);
1da177e4
LT		 2741 err = add_audio_endpoint(chip, stream, fp);
2742 if (err < 0) {
2743 kfree(fp->rate_table);
2744 kfree(fp);
2745 return err;
2746 }
2747 /* try to set the interface... */
2748 usb_set_interface(chip->dev, iface_no, altno);
2749 init_usb_pitch(chip->dev, iface_no, alts, fp);
2750 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2751 }
2752 return 0;
2753}
2754
2755
2756/*
2757 * disconnect streams
2758 * called from snd_usb_audio_disconnect()
2759 */
ee733397 2760static void snd_usb_stream_disconnect(struct list_head *head)
1da177e4
LT		 2761{
2762 int idx;
86e07d34
TI		 2763 struct snd_usb_stream *as;
2764 struct snd_usb_substream *subs;
1da177e4 2765
86e07d34 2766 as = list_entry(head, struct snd_usb_stream, list);
1da177e4
LT		 2767 for (idx = 0; idx < 2; idx++) {
2768 subs = &as->substream[idx];
2769 if (!subs->num_formats)
2770 return;
2771 release_substream_urbs(subs, 1);
2772 subs->interface = -1;
2773 }
2774}
2775
2776/*
2777 * parse audio control descriptor and create pcm/midi streams
2778 */
86e07d34 2779static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
1da177e4
LT		 2780{
2781 struct usb_device *dev = chip->dev;
2782 struct usb_host_interface *host_iface;
2783 struct usb_interface *iface;
2784 unsigned char *p1;
2785 int i, j;
2786
2787 /* find audiocontrol interface */
2788 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2789 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2790 snd_printk(KERN_ERR "cannot find HEADER\n");
2791 return -EINVAL;
2792 }
2793 if (! p1[7] || p1[0] < 8 + p1[7]) {
2794 snd_printk(KERN_ERR "invalid HEADER\n");
2795 return -EINVAL;
2796 }
2797
2798 /*
2799 * parse all USB audio streaming interfaces
2800 */
2801 for (i = 0; i < p1[7]; i++) {
2802 struct usb_host_interface *alts;
2803 struct usb_interface_descriptor *altsd;
2804 j = p1[8 + i];
2805 iface = usb_ifnum_to_if(dev, j);
2806 if (!iface) {
2807 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2808 dev->devnum, ctrlif, j);
2809 continue;
2810 }
2811 if (usb_interface_claimed(iface)) {
2812 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2813 continue;
2814 }
2815 alts = &iface->altsetting[0];
2816 altsd = get_iface_desc(alts);
2817 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2818 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2819 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2820 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2821 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2822 continue;
2823 }
2824 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2825 continue;
2826 }
2827 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2828 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2829 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2830 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2831 /* skip non-supported classes */
2832 continue;
2833 }
2834 if (! parse_audio_endpoints(chip, j)) {
2835 usb_set_interface(dev, j, 0); /* reset the current interface */
2836 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2837 }
2838 }
2839
2840 return 0;
2841}
2842
2843/*
2844 * create a stream for an endpoint/altsetting without proper descriptors
2845 */
86e07d34 2846static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
1da177e4 2847 struct usb_interface *iface,
86e07d34 2848 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2849{
2850 struct audioformat *fp;
2851 struct usb_host_interface *alts;
2852 int stream, err;
2853 int *rate_table = NULL;
2854
52978be6 2855 fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
1da177e4 2856 if (! fp) {
52978be6 2857 snd_printk(KERN_ERR "cannot memdup\n");
1da177e4
LT		 2858 return -ENOMEM;
2859 }
1da177e4
LT		 2860 if (fp->nr_rates > 0) {
2861 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2862 if (!rate_table) {
2863 kfree(fp);
2864 return -ENOMEM;
2865 }
2866 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2867 fp->rate_table = rate_table;
2868 }
2869
2870 stream = (fp->endpoint & USB_DIR_IN)
2871 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2872 err = add_audio_endpoint(chip, stream, fp);
2873 if (err < 0) {
2874 kfree(fp);
2875 kfree(rate_table);
2876 return err;
2877 }
2878 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2879 fp->altset_idx >= iface->num_altsetting) {
2880 kfree(fp);
2881 kfree(rate_table);
2882 return -EINVAL;
2883 }
2884 alts = &iface->altsetting[fp->altset_idx];
2885 usb_set_interface(chip->dev, fp->iface, 0);
2886 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2887 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2888 return 0;
2889}
2890
2891/*
2892 * create a stream for an interface with proper descriptors
2893 */
86e07d34 2894static int create_standard_audio_quirk(struct snd_usb_audio *chip,
d1bda045 2895 struct usb_interface *iface,
86e07d34 2896 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2897{
2898 struct usb_host_interface *alts;
2899 struct usb_interface_descriptor *altsd;
2900 int err;
2901
2902 alts = &iface->altsetting[0];
2903 altsd = get_iface_desc(alts);
d1bda045 2904 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
1da177e4
LT		 2905 if (err < 0) {
2906 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2907 altsd->bInterfaceNumber, err);
2908 return err;
2909 }
d1bda045
CL		 2910 /* reset the current interface */
2911 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
1da177e4
LT		 2912 return 0;
2913}
2914
2915/*
2916 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2917 * to detect the sample rate is by looking at wMaxPacketSize.
2918 */
86e07d34 2919static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
854af957 2920 struct usb_interface *iface,
86e07d34 2921 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 2922{
2923 static const struct audioformat ua_format = {
2924 .format = SNDRV_PCM_FORMAT_S24_3LE,
2925 .channels = 2,
2926 .fmt_type = USB_FORMAT_TYPE_I,
2927 .altsetting = 1,
2928 .altset_idx = 1,
2929 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2930 };
2931 struct usb_host_interface *alts;
2932 struct usb_interface_descriptor *altsd;
2933 struct audioformat *fp;
2934 int stream, err;
2935
2936 /* both PCM and MIDI interfaces have 2 altsettings */
2937 if (iface->num_altsetting != 2)
2938 return -ENXIO;
2939 alts = &iface->altsetting[1];
2940 altsd = get_iface_desc(alts);
2941
2942 if (altsd->bNumEndpoints == 2) {
86e07d34 2943 static const struct snd_usb_midi_endpoint_info ua700_ep = {
1da177e4
LT		 2944 .out_cables = 0x0003,
2945 .in_cables = 0x0003
2946 };
86e07d34 2947 static const struct snd_usb_audio_quirk ua700_quirk = {
1da177e4
LT		 2948 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2949 .data = &ua700_ep
2950 };
86e07d34 2951 static const struct snd_usb_midi_endpoint_info ua25_ep = {
1da177e4
LT		 2952 .out_cables = 0x0001,
2953 .in_cables = 0x0001
2954 };
86e07d34 2955 static const struct snd_usb_audio_quirk ua25_quirk = {
1da177e4
LT		 2956 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2957 .data = &ua25_ep
2958 };
27d10f56 2959 if (chip->usb_id == USB_ID(0x0582, 0x002b))
1da177e4
LT		 2960 return snd_usb_create_midi_interface(chip, iface,
2961 &ua700_quirk);
2962 else
2963 return snd_usb_create_midi_interface(chip, iface,
2964 &ua25_quirk);
2965 }
2966
2967 if (altsd->bNumEndpoints != 1)
2968 return -ENXIO;
2969
2970 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2971 if (!fp)
2972 return -ENOMEM;
2973 memcpy(fp, &ua_format, sizeof(*fp));
2974
2975 fp->iface = altsd->bInterfaceNumber;
2976 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2977 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2978 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2979
2980 switch (fp->maxpacksize) {
2981 case 0x120:
2982 fp->rate_max = fp->rate_min = 44100;
2983 break;
2984 case 0x138:
2985 case 0x140:
2986 fp->rate_max = fp->rate_min = 48000;
2987 break;
2988 case 0x258:
2989 case 0x260:
2990 fp->rate_max = fp->rate_min = 96000;
2991 break;
2992 default:
2993 snd_printk(KERN_ERR "unknown sample rate\n");
2994 kfree(fp);
2995 return -ENXIO;
2996 }
2997
2998 stream = (fp->endpoint & USB_DIR_IN)
2999 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3000 err = add_audio_endpoint(chip, stream, fp);
3001 if (err < 0) {
3002 kfree(fp);
3003 return err;
3004 }
3005 usb_set_interface(chip->dev, fp->iface, 0);
3006 return 0;
3007}
3008
3009/*
3010 * Create a stream for an Edirol UA-1000 interface.
3011 */
86e07d34 3012static int create_ua1000_quirk(struct snd_usb_audio *chip,
854af957 3013 struct usb_interface *iface,
86e07d34 3014 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3015{
3016 static const struct audioformat ua1000_format = {
3017 .format = SNDRV_PCM_FORMAT_S32_LE,
3018 .fmt_type = USB_FORMAT_TYPE_I,
3019 .altsetting = 1,
3020 .altset_idx = 1,
3021 .attributes = 0,
3022 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3023 };
3024 struct usb_host_interface *alts;
3025 struct usb_interface_descriptor *altsd;
3026 struct audioformat *fp;
3027 int stream, err;
3028
3029 if (iface->num_altsetting != 2)
3030 return -ENXIO;
3031 alts = &iface->altsetting[1];
3032 altsd = get_iface_desc(alts);
c4a87ef4 3033 if (alts->extralen != 11 || alts->extra[1] != USB_DT_CS_INTERFACE ||
1da177e4
LT		 3034 altsd->bNumEndpoints != 1)
3035 return -ENXIO;
3036
52978be6 3037 fp = kmemdup(&ua1000_format, sizeof(*fp), GFP_KERNEL);
1da177e4
LT		 3038 if (!fp)
3039 return -ENOMEM;
1da177e4
LT		 3040
3041 fp->channels = alts->extra[4];
3042 fp->iface = altsd->bInterfaceNumber;
3043 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3044 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3045 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3046 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
3047
3048 stream = (fp->endpoint & USB_DIR_IN)
3049 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3050 err = add_audio_endpoint(chip, stream, fp);
3051 if (err < 0) {
3052 kfree(fp);
3053 return err;
3054 }
3055 /* FIXME: playback must be synchronized to capture */
3056 usb_set_interface(chip->dev, fp->iface, 0);
3057 return 0;
3058}
3059
86e07d34 3060static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3061 struct usb_interface *iface,
86e07d34 3062 const struct snd_usb_audio_quirk *quirk);
1da177e4
LT		 3063
3064/*
3065 * handle the quirks for the contained interfaces
3066 */
86e07d34 3067static int create_composite_quirk(struct snd_usb_audio *chip,
1da177e4 3068 struct usb_interface *iface,
86e07d34 3069 const struct snd_usb_audio_quirk *quirk)
1da177e4
LT		 3070{
3071 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
3072 int err;
3073
3074 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
3075 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
3076 if (!iface)
3077 continue;
3078 if (quirk->ifnum != probed_ifnum &&
3079 usb_interface_claimed(iface))
3080 continue;
3081 err = snd_usb_create_quirk(chip, iface, quirk);
3082 if (err < 0)
3083 return err;
3084 if (quirk->ifnum != probed_ifnum)
3085 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
3086 }
3087 return 0;
3088}
3089
86e07d34 3090static int ignore_interface_quirk(struct snd_usb_audio *chip,
854af957 3091 struct usb_interface *iface,
86e07d34 3092 const struct snd_usb_audio_quirk *quirk)
854af957
CL		 3093{
3094 return 0;
3095}
3096
1da177e4
LT		 3097
3098/*
3099 * boot quirks
3100 */
3101
3102#define EXTIGY_FIRMWARE_SIZE_OLD 794
3103#define EXTIGY_FIRMWARE_SIZE_NEW 483
3104
3105static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
3106{
3107 struct usb_host_config *config = dev->actconfig;
3108 int err;
3109
3110 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
3111 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
3112 snd_printdd("sending Extigy boot sequence...\n");
3113 /* Send message to force it to reconnect with full interface. */
3114 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
3115 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
3116 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
3117 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
3118 &dev->descriptor, sizeof(dev->descriptor));
3119 config = dev->actconfig;
3120 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
3121 err = usb_reset_configuration(dev);
3122 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
3123 snd_printdd("extigy_boot: new boot length = %d\n",
3124 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
3125 return -ENODEV; /* quit this anyway */
3126 }
3127 return 0;
3128}
3129
3a2f0856
CL		 3130static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
3131{
3a2f0856
CL		 3132 u8 buf = 1;
3133
3134 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
3135 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3136 0, 0, &buf, 1, 1000);
3137 if (buf == 0) {
3138 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
3139 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
3140 1, 2000, NULL, 0, 1000);
3141 return -ENODEV;
3142 }
3a2f0856
CL		 3143 return 0;
3144}
3145
e217e30c
SR		 3146/*
3147 * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
3148 * documented in the device's data sheet.
3149 */
3150static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
3151{
3152 u8 buf[4];
3153 buf[0] = 0x20;
3154 buf[1] = value & 0xff;
3155 buf[2] = (value >> 8) & 0xff;
3156 buf[3] = reg;
3157 return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
3158 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
3159 0, 0, &buf, 4, 1000);
3160}
3161
3162static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
3163{
3164 /*
3165 * Enable line-out driver mode, set headphone source to front
3166 * channels, enable stereo mic.
3167 */
3168 return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
3169}
3170
3171
e311334e
TLM		 3172/*
3173 * Setup quirks
3174 */
3175#define AUDIOPHILE_SET 0x01 /* if set, parse device_setup */
3176#define AUDIOPHILE_SET_DTS 0x02 /* if set, enable DTS Digital Output */
3177#define AUDIOPHILE_SET_96K 0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
3178#define AUDIOPHILE_SET_24B 0x08 /* 24bits sample if set, 16bits otherwise */
3179#define AUDIOPHILE_SET_DI 0x10 /* if set, enable Digital Input */
3180#define AUDIOPHILE_SET_MASK 0x1F /* bit mask for setup value */
3181#define AUDIOPHILE_SET_24B_48K_DI 0x19 /* value for 24bits+48KHz+Digital Input */
3182#define AUDIOPHILE_SET_24B_48K_NOTDI 0x09 /* value for 24bits+48KHz+No Digital Input */
3183#define AUDIOPHILE_SET_16B_48K_DI 0x11 /* value for 16bits+48KHz+Digital Input */
3184#define AUDIOPHILE_SET_16B_48K_NOTDI 0x01 /* value for 16bits+48KHz+No Digital Input */
3185
3186static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
3187 int iface, int altno)
3188{
3189 if (device_setup[chip->index] & AUDIOPHILE_SET) {
3190 if ((device_setup[chip->index] & AUDIOPHILE_SET_DTS)
3191 && altno != 6)
3192 return 1; /* skip this altsetting */
3193 if ((device_setup[chip->index] & AUDIOPHILE_SET_96K)
3194 && altno != 1)
3195 return 1; /* skip this altsetting */
3196 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3197 AUDIOPHILE_SET_24B_48K_DI && altno != 2)
3198 return 1; /* skip this altsetting */
3199 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3200 AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
3201 return 1; /* skip this altsetting */
3202 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3203 AUDIOPHILE_SET_16B_48K_DI && altno != 4)
3204 return 1; /* skip this altsetting */
3205 if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
3206 AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
3207 return 1; /* skip this altsetting */
3208 }
3209 return 0; /* keep this altsetting */
3210}
1da177e4
LT		 3211
3212/*
3213 * audio-interface quirks
3214 *
3215 * returns zero if no standard audio/MIDI parsing is needed.
3216 * returns a postive value if standard audio/midi interfaces are parsed
3217 * after this.
3218 * returns a negative value at error.
3219 */
86e07d34 3220static int snd_usb_create_quirk(struct snd_usb_audio *chip,
1da177e4 3221 struct usb_interface *iface,
86e07d34 3222 const struct snd_usb_audio_quirk *quirk)
1da177e4 3223{
86e07d34
TI		 3224 typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
3225 const struct snd_usb_audio_quirk *);
854af957
CL		 3226 static const quirk_func_t quirk_funcs[] = {
3227 [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
3228 [QUIRK_COMPOSITE] = create_composite_quirk,
3229 [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
3230 [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
3231 [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
3232 [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
3233 [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
3234 [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
3235 [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
cc7a59bd 3236 [QUIRK_MIDI_CME] = snd_usb_create_midi_interface,
d1bda045 3237 [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
854af957
CL		 3238 [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
3239 [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
3240 [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
3241 };
3242
3243 if (quirk->type < QUIRK_TYPE_COUNT) {
3244 return quirk_funcs[quirk->type](chip, iface, quirk);
3245 } else {
1da177e4
LT		 3246 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
3247 return -ENXIO;
3248 }
3249}
3250
3251
3252/*
3253 * common proc files to show the usb device info
3254 */
86e07d34 3255static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3256{
86e07d34 3257 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3258 if (! chip->shutdown)
3259 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
3260}
3261
86e07d34 3262static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
1da177e4 3263{
86e07d34 3264 struct snd_usb_audio *chip = entry->private_data;
1da177e4
LT		 3265 if (! chip->shutdown)
3266 snd_iprintf(buffer, "%04x:%04x\n",
27d10f56
CL		 3267 USB_ID_VENDOR(chip->usb_id),
3268 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3269}
3270
86e07d34 3271static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
1da177e4 3272{
86e07d34 3273 struct snd_info_entry *entry;
1da177e4 3274 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
bf850204 3275 snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
1da177e4 3276 if (! snd_card_proc_new(chip->card, "usbid", &entry))
bf850204 3277 snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
1da177e4
LT		 3278}
3279
3280/*
3281 * free the chip instance
3282 *
3283 * here we have to do not much, since pcm and controls are already freed
3284 *
3285 */
3286
86e07d34 3287static int snd_usb_audio_free(struct snd_usb_audio *chip)
1da177e4
LT		 3288{
3289 kfree(chip);
3290 return 0;
3291}
3292
86e07d34 3293static int snd_usb_audio_dev_free(struct snd_device *device)
1da177e4 3294{
86e07d34 3295 struct snd_usb_audio *chip = device->device_data;
1da177e4
LT		 3296 return snd_usb_audio_free(chip);
3297}
3298
3299
3300/*
3301 * create a chip instance and set its names.
3302 */
3303static int snd_usb_audio_create(struct usb_device *dev, int idx,
86e07d34
TI		 3304 const struct snd_usb_audio_quirk *quirk,
3305 struct snd_usb_audio **rchip)
1da177e4 3306{
86e07d34
TI		 3307 struct snd_card *card;
3308 struct snd_usb_audio *chip;
1da177e4
LT		 3309 int err, len;
3310 char component[14];
86e07d34 3311 static struct snd_device_ops ops = {
1da177e4
LT		 3312 .dev_free = snd_usb_audio_dev_free,
3313 };
3314
3315 *rchip = NULL;
3316
3317 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3318 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3319 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3320 return -ENXIO;
3321 }
3322
3323 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3324 if (card == NULL) {
3325 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3326 return -ENOMEM;
3327 }
3328
561b220a 3329 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1da177e4
LT		 3330 if (! chip) {
3331 snd_card_free(card);
3332 return -ENOMEM;
3333 }
3334
3335 chip->index = idx;
3336 chip->dev = dev;
3337 chip->card = card;
27d10f56
CL		 3338 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3339 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3340 INIT_LIST_HEAD(&chip->pcm_list);
3341 INIT_LIST_HEAD(&chip->midi_list);
84957a8a 3342 INIT_LIST_HEAD(&chip->mixer_list);
1da177e4
LT		 3343
3344 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3345 snd_usb_audio_free(chip);
3346 snd_card_free(card);
3347 return err;
3348 }
3349
3350 strcpy(card->driver, "USB-Audio");
3351 sprintf(component, "USB%04x:%04x",
27d10f56 3352 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3353 snd_component_add(card, component);
3354
3355 /* retrieve the device string as shortname */
3356 if (quirk && quirk->product_name) {
3357 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3358 } else {
3359 if (!dev->descriptor.iProduct ||
3360 usb_string(dev, dev->descriptor.iProduct,
3361 card->shortname, sizeof(card->shortname)) <= 0) {
3362 /* no name available from anywhere, so use ID */
3363 sprintf(card->shortname, "USB Device %#04x:%#04x",
27d10f56
CL		 3364 USB_ID_VENDOR(chip->usb_id),
3365 USB_ID_PRODUCT(chip->usb_id));
1da177e4
LT		 3366 }
3367 }
3368
3369 /* retrieve the vendor and device strings as longname */
3370 if (quirk && quirk->vendor_name) {
3371 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3372 } else {
3373 if (dev->descriptor.iManufacturer)
3374 len = usb_string(dev, dev->descriptor.iManufacturer,
3375 card->longname, sizeof(card->longname));
3376 else
3377 len = 0;
3378 /* we don't really care if there isn't any vendor string */
3379 }
3380 if (len > 0)
3381 strlcat(card->longname, " ", sizeof(card->longname));
3382
3383 strlcat(card->longname, card->shortname, sizeof(card->longname));
3384
3385 len = strlcat(card->longname, " at ", sizeof(card->longname));
3386
3387 if (len < sizeof(card->longname))
3388 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3389
3390 strlcat(card->longname,
3391 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3392 sizeof(card->longname));
3393
3394 snd_usb_audio_create_proc(chip);
3395
1da177e4
LT		 3396 *rchip = chip;
3397 return 0;
3398}
3399
3400
3401/*
3402 * probe the active usb device
3403 *
3404 * note that this can be called multiple times per a device, when it
3405 * includes multiple audio control interfaces.
3406 *
3407 * thus we check the usb device pointer and creates the card instance
3408 * only at the first time. the successive calls of this function will
3409 * append the pcm interface to the corresponding card.
3410 */
3411static void *snd_usb_audio_probe(struct usb_device *dev,
3412 struct usb_interface *intf,
3413 const struct usb_device_id *usb_id)
3414{
86e07d34 3415 const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
1da177e4 3416 int i, err;
86e07d34 3417 struct snd_usb_audio *chip;
1da177e4
LT		 3418 struct usb_host_interface *alts;
3419 int ifnum;
27d10f56 3420 u32 id;
1da177e4
LT		 3421
3422 alts = &intf->altsetting[0];
3423 ifnum = get_iface_desc(alts)->bInterfaceNumber;
27d10f56
CL		 3424 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3425 le16_to_cpu(dev->descriptor.idProduct));
1da177e4
LT		 3426
3427 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3428 goto __err_val;
3429
3430 /* SB Extigy needs special boot-up sequence */
3431 /* if more models come, this will go to the quirk list. */
27d10f56 3432 if (id == USB_ID(0x041e, 0x3000)) {
1da177e4
LT		 3433 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3434 goto __err_val;
1da177e4 3435 }
3a2f0856
CL		 3436 /* SB Audigy 2 NX needs its own boot-up magic, too */
3437 if (id == USB_ID(0x041e, 0x3020)) {
3438 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3439 goto __err_val;
3440 }
1da177e4 3441
e217e30c
SR		 3442 /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
3443 if (id == USB_ID(0x10f5, 0x0200)) {
3444 if (snd_usb_cm106_boot_quirk(dev) < 0)
3445 goto __err_val;
3446 }
3447
1da177e4
LT		 3448 /*
3449 * found a config. now register to ALSA
3450 */
3451
3452 /* check whether it's already registered */
3453 chip = NULL;
12aa7579 3454 mutex_lock(&register_mutex);
1da177e4
LT		 3455 for (i = 0; i < SNDRV_CARDS; i++) {
3456 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3457 if (usb_chip[i]->shutdown) {
3458 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3459 goto __error;
3460 }
3461 chip = usb_chip[i];
3462 break;
3463 }
3464 }
3465 if (! chip) {
3466 /* it's a fresh one.
3467 * now look for an empty slot and create a new card instance
3468 */
1da177e4
LT		 3469 for (i = 0; i < SNDRV_CARDS; i++)
3470 if (enable[i] && ! usb_chip[i] &&
27d10f56
CL		 3471 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3472 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
1da177e4
LT		 3473 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3474 goto __error;
3475 }
1dcd3ec4 3476 snd_card_set_dev(chip->card, &intf->dev);
1da177e4
LT		 3477 break;
3478 }
3479 if (! chip) {
3480 snd_printk(KERN_ERR "no available usb audio device\n");
3481 goto __error;
3482 }
3483 }
3484
3485 err = 1; /* continue */
3486 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3487 /* need some special handlings */
3488 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3489 goto __error;
3490 }
3491
3492 if (err > 0) {
3493 /* create normal USB audio interfaces */
3494 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3495 snd_usb_create_mixer(chip, ifnum) < 0) {
3496 goto __error;
3497 }
3498 }
3499
3500 /* we are allowed to call snd_card_register() many times */
3501 if (snd_card_register(chip->card) < 0) {
3502 goto __error;
3503 }
3504
3505 usb_chip[chip->index] = chip;
3506 chip->num_interfaces++;
12aa7579 3507 mutex_unlock(&register_mutex);
1da177e4
LT		 3508 return chip;
3509
3510 __error:
3511 if (chip && !chip->num_interfaces)
3512 snd_card_free(chip->card);
12aa7579 3513 mutex_unlock(&register_mutex);
1da177e4
LT		 3514 __err_val:
3515 return NULL;
3516}
3517
3518/*
3519 * we need to take care of counter, since disconnection can be called also
3520 * many times as well as usb_audio_probe().
3521 */
3522static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3523{
86e07d34
TI		 3524 struct snd_usb_audio *chip;
3525 struct snd_card *card;
1da177e4
LT		 3526 struct list_head *p;
3527
3528 if (ptr == (void *)-1L)
3529 return;
3530
3531 chip = ptr;
3532 card = chip->card;
12aa7579 3533 mutex_lock(&register_mutex);
1da177e4
LT		 3534 chip->shutdown = 1;
3535 chip->num_interfaces--;
3536 if (chip->num_interfaces <= 0) {
3537 snd_card_disconnect(card);
3538 /* release the pcm resources */
3539 list_for_each(p, &chip->pcm_list) {
ee733397 3540 snd_usb_stream_disconnect(p);
1da177e4
LT		 3541 }
3542 /* release the midi resources */
3543 list_for_each(p, &chip->midi_list) {
ee733397 3544 snd_usbmidi_disconnect(p);
1da177e4 3545 }
84957a8a
CL		 3546 /* release mixer resources */
3547 list_for_each(p, &chip->mixer_list) {
3548 snd_usb_mixer_disconnect(p);
3549 }
1da177e4 3550 usb_chip[chip->index] = NULL;
12aa7579 3551 mutex_unlock(&register_mutex);
c461482c 3552 snd_card_free_when_closed(card);
1da177e4 3553 } else {
12aa7579 3554 mutex_unlock(&register_mutex);
1da177e4
LT		 3555 }
3556}
3557
3558/*
3559 * new 2.5 USB kernel API
3560 */
3561static int usb_audio_probe(struct usb_interface *intf,
3562 const struct usb_device_id *id)
3563{
3564 void *chip;
3565 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3566 if (chip) {
3567 dev_set_drvdata(&intf->dev, chip);
3568 return 0;
3569 } else
3570 return -EIO;
3571}
3572
3573static void usb_audio_disconnect(struct usb_interface *intf)
3574{
3575 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3576 dev_get_drvdata(&intf->dev));
3577}
3578
3579
3580static int __init snd_usb_audio_init(void)
3581{
3582 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3583 printk(KERN_WARNING "invalid nrpacks value.\n");
3584 return -EINVAL;
3585 }
cf78bbc4 3586 return usb_register(&usb_audio_driver);
1da177e4
LT		 3587}
3588
3589
3590static void __exit snd_usb_audio_cleanup(void)
3591{
3592 usb_deregister(&usb_audio_driver);
3593}
3594
3595module_init(snd_usb_audio_init);
3596module_exit(snd_usb_audio_cleanup);
Linux kernel - Deliverables
This page took 0.382414 seconds and 5 git commands to generate.