2 * (Tentative) USB Audio Driver for ALSA
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
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.
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.
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
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).
41 #include <sound/driver.h>
42 #include <linux/bitops.h>
43 #include <linux/init.h>
44 #include <linux/list.h>
45 #include <linux/slab.h>
46 #include <linux/string.h>
47 #include <linux/usb.h>
48 #include <linux/vmalloc.h>
49 #include <linux/moduleparam.h>
50 #include <sound/core.h>
51 #include <sound/info.h>
52 #include <sound/pcm.h>
53 #include <sound/pcm_params.h>
54 #include <sound/initval.h>
59 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
60 MODULE_DESCRIPTION("USB Audio");
61 MODULE_LICENSE("GPL");
62 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
65 static int index
[SNDRV_CARDS
] = SNDRV_DEFAULT_IDX
; /* Index 0-MAX */
66 static char *id
[SNDRV_CARDS
] = SNDRV_DEFAULT_STR
; /* ID for this card */
67 static int enable
[SNDRV_CARDS
] = SNDRV_DEFAULT_ENABLE_PNP
; /* Enable this card */
68 static int vid
[SNDRV_CARDS
] = { [0 ... (SNDRV_CARDS
-1)] = -1 }; /* Vendor ID for this card */
69 static int pid
[SNDRV_CARDS
] = { [0 ... (SNDRV_CARDS
-1)] = -1 }; /* Product ID for this card */
70 static int nrpacks
= 4; /* max. number of packets per urb */
71 static int async_unlink
= 1;
73 module_param_array(index
, int, NULL
, 0444);
74 MODULE_PARM_DESC(index
, "Index value for the USB audio adapter.");
75 module_param_array(id
, charp
, NULL
, 0444);
76 MODULE_PARM_DESC(id
, "ID string for the USB audio adapter.");
77 module_param_array(enable
, bool, NULL
, 0444);
78 MODULE_PARM_DESC(enable
, "Enable USB audio adapter.");
79 module_param_array(vid
, int, NULL
, 0444);
80 MODULE_PARM_DESC(vid
, "Vendor ID for the USB audio device.");
81 module_param_array(pid
, int, NULL
, 0444);
82 MODULE_PARM_DESC(pid
, "Product ID for the USB audio device.");
83 module_param(nrpacks
, int, 0644);
84 MODULE_PARM_DESC(nrpacks
, "Max. number of packets per URB.");
85 module_param(async_unlink
, bool, 0444);
86 MODULE_PARM_DESC(async_unlink
, "Use async unlink mode.");
90 * debug the h/w constraints
92 /* #define HW_CONST_DEBUG */
100 #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
102 #define SYNC_URBS 4 /* always four urbs for sync */
103 #define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
105 typedef struct snd_usb_substream snd_usb_substream_t
;
106 typedef struct snd_usb_stream snd_usb_stream_t
;
107 typedef struct snd_urb_ctx snd_urb_ctx_t
;
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 */
130 unsigned int buffer_size
; /* size of data buffer, if data URB */
131 snd_usb_substream_t
*subs
;
132 int index
; /* index for urb array */
133 int packets
; /* number of packets per urb */
137 int (*prepare
)(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
, struct urb
*u
);
138 int (*retire
)(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
, struct urb
*u
);
139 int (*prepare_sync
)(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
, struct urb
*u
);
140 int (*retire_sync
)(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
, struct urb
*u
);
143 struct snd_usb_substream
{
144 snd_usb_stream_t
*stream
;
145 struct usb_device
*dev
;
146 snd_pcm_substream_t
*pcm_substream
;
147 int direction
; /* playback or capture */
148 int interface
; /* current interface */
149 int endpoint
; /* assigned endpoint */
150 struct audioformat
*cur_audiofmt
; /* current audioformat pointer (for hw_params callback) */
151 unsigned int cur_rate
; /* current rate (for hw_params callback) */
152 unsigned int period_bytes
; /* current period bytes (for hw_params callback) */
153 unsigned int format
; /* USB data format */
154 unsigned int datapipe
; /* the data i/o pipe */
155 unsigned int syncpipe
; /* 1 - async out or adaptive in */
156 unsigned int datainterval
; /* log_2 of data packet interval */
157 unsigned int syncinterval
; /* P for adaptive mode, 0 otherwise */
158 unsigned int freqn
; /* nominal sampling rate in fs/fps in Q16.16 format */
159 unsigned int freqm
; /* momentary sampling rate in fs/fps in Q16.16 format */
160 unsigned int freqmax
; /* maximum sampling rate, used for buffer management */
161 unsigned int phase
; /* phase accumulator */
162 unsigned int maxpacksize
; /* max packet size in bytes */
163 unsigned int maxframesize
; /* max packet size in frames */
164 unsigned int curpacksize
; /* current packet size in bytes (for capture) */
165 unsigned int curframesize
; /* current packet size in frames (for capture) */
166 unsigned int fill_max
: 1; /* fill max packet size always */
167 unsigned int fmt_type
; /* USB audio format type (1-3) */
168 unsigned int packs_per_ms
; /* packets per millisecond (for playback) */
170 unsigned int running
: 1; /* running status */
172 unsigned int hwptr_done
; /* processed frame position in the buffer */
173 unsigned int transfer_done
; /* processed frames since last period update */
174 unsigned long active_mask
; /* bitmask of active urbs */
175 unsigned long unlink_mask
; /* bitmask of unlinked urbs */
177 unsigned int nurbs
; /* # urbs */
178 snd_urb_ctx_t dataurb
[MAX_URBS
]; /* data urb table */
179 snd_urb_ctx_t syncurb
[SYNC_URBS
]; /* sync urb table */
180 char *syncbuf
; /* sync buffer for all sync URBs */
181 dma_addr_t sync_dma
; /* DMA address of syncbuf */
183 u64 formats
; /* format bitmasks (all or'ed) */
184 unsigned int num_formats
; /* number of supported audio formats (list) */
185 struct list_head fmt_list
; /* format list */
188 struct snd_urb_ops ops
; /* callbacks (must be filled at init) */
192 struct snd_usb_stream
{
193 snd_usb_audio_t
*chip
;
196 unsigned int fmt_type
; /* USB audio format type (1-3) */
197 snd_usb_substream_t substream
[2];
198 struct list_head list
;
203 * we keep the snd_usb_audio_t instances by ourselves for merging
204 * the all interfaces on the same card as one sound device.
207 static DECLARE_MUTEX(register_mutex
);
208 static snd_usb_audio_t
*usb_chip
[SNDRV_CARDS
];
212 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
213 * this will overflow at approx 524 kHz
215 static inline unsigned get_usb_full_speed_rate(unsigned int rate
)
217 return ((rate
<< 13) + 62) / 125;
221 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
222 * this will overflow at approx 4 MHz
224 static inline unsigned get_usb_high_speed_rate(unsigned int rate
)
226 return ((rate
<< 10) + 62) / 125;
229 /* convert our full speed USB rate into sampling rate in Hz */
230 static inline unsigned get_full_speed_hz(unsigned int usb_rate
)
232 return (usb_rate
* 125 + (1 << 12)) >> 13;
235 /* convert our high speed USB rate into sampling rate in Hz */
236 static inline unsigned get_high_speed_hz(unsigned int usb_rate
)
238 return (usb_rate
* 125 + (1 << 9)) >> 10;
243 * prepare urb for full speed capture sync pipe
245 * fill the length and offset of each urb descriptor.
246 * the fixed 10.14 frequency is passed through the pipe.
248 static int prepare_capture_sync_urb(snd_usb_substream_t
*subs
,
249 snd_pcm_runtime_t
*runtime
,
252 unsigned char *cp
= urb
->transfer_buffer
;
253 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
255 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
256 urb
->iso_frame_desc
[0].length
= 3;
257 urb
->iso_frame_desc
[0].offset
= 0;
258 cp
[0] = subs
->freqn
>> 2;
259 cp
[1] = subs
->freqn
>> 10;
260 cp
[2] = subs
->freqn
>> 18;
265 * prepare urb for high speed capture sync pipe
267 * fill the length and offset of each urb descriptor.
268 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
270 static int prepare_capture_sync_urb_hs(snd_usb_substream_t
*subs
,
271 snd_pcm_runtime_t
*runtime
,
274 unsigned char *cp
= urb
->transfer_buffer
;
275 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
277 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
278 urb
->iso_frame_desc
[0].length
= 4;
279 urb
->iso_frame_desc
[0].offset
= 0;
281 cp
[1] = subs
->freqn
>> 8;
282 cp
[2] = subs
->freqn
>> 16;
283 cp
[3] = subs
->freqn
>> 24;
288 * process after capture sync complete
291 static int retire_capture_sync_urb(snd_usb_substream_t
*subs
,
292 snd_pcm_runtime_t
*runtime
,
299 * prepare urb for capture data pipe
301 * fill the offset and length of each descriptor.
303 * we use a temporary buffer to write the captured data.
304 * since the length of written data is determined by host, we cannot
305 * write onto the pcm buffer directly... the data is thus copied
306 * later at complete callback to the global buffer.
308 static int prepare_capture_urb(snd_usb_substream_t
*subs
,
309 snd_pcm_runtime_t
*runtime
,
313 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
316 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
317 for (i
= 0; i
< ctx
->packets
; i
++) {
318 urb
->iso_frame_desc
[i
].offset
= offs
;
319 urb
->iso_frame_desc
[i
].length
= subs
->curpacksize
;
320 offs
+= subs
->curpacksize
;
322 urb
->transfer_buffer_length
= offs
;
323 urb
->number_of_packets
= ctx
->packets
;
325 if (! urb
->bandwidth
) {
327 bustime
= usb_check_bandwidth(urb
->dev
, urb
);
330 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx
->index
, bustime
, urb
->number_of_packets
);
331 usb_claim_bandwidth(urb
->dev
, urb
, bustime
, 1);
338 * process after capture complete
340 * copy the data from each desctiptor to the pcm buffer, and
341 * update the current position.
343 static int retire_capture_urb(snd_usb_substream_t
*subs
,
344 snd_pcm_runtime_t
*runtime
,
350 unsigned int stride
, len
, oldptr
;
351 int period_elapsed
= 0;
353 stride
= runtime
->frame_bits
>> 3;
355 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
356 cp
= (unsigned char *)urb
->transfer_buffer
+ urb
->iso_frame_desc
[i
].offset
;
357 if (urb
->iso_frame_desc
[i
].status
) {
358 snd_printd(KERN_ERR
"frame %d active: %d\n", i
, urb
->iso_frame_desc
[i
].status
);
361 len
= urb
->iso_frame_desc
[i
].actual_length
/ stride
;
364 /* update the current pointer */
365 spin_lock_irqsave(&subs
->lock
, flags
);
366 oldptr
= subs
->hwptr_done
;
367 subs
->hwptr_done
+= len
;
368 if (subs
->hwptr_done
>= runtime
->buffer_size
)
369 subs
->hwptr_done
-= runtime
->buffer_size
;
370 subs
->transfer_done
+= len
;
371 if (subs
->transfer_done
>= runtime
->period_size
) {
372 subs
->transfer_done
-= runtime
->period_size
;
375 spin_unlock_irqrestore(&subs
->lock
, flags
);
376 /* copy a data chunk */
377 if (oldptr
+ len
> runtime
->buffer_size
) {
378 unsigned int cnt
= runtime
->buffer_size
- oldptr
;
379 unsigned int blen
= cnt
* stride
;
380 memcpy(runtime
->dma_area
+ oldptr
* stride
, cp
, blen
);
381 memcpy(runtime
->dma_area
, cp
+ blen
, len
* stride
- blen
);
383 memcpy(runtime
->dma_area
+ oldptr
* stride
, cp
, len
* stride
);
387 snd_pcm_period_elapsed(subs
->pcm_substream
);
393 * prepare urb for full speed playback sync pipe
395 * set up the offset and length to receive the current frequency.
398 static int prepare_playback_sync_urb(snd_usb_substream_t
*subs
,
399 snd_pcm_runtime_t
*runtime
,
402 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
404 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
405 urb
->iso_frame_desc
[0].length
= 3;
406 urb
->iso_frame_desc
[0].offset
= 0;
411 * prepare urb for high speed playback sync pipe
413 * set up the offset and length to receive the current frequency.
416 static int prepare_playback_sync_urb_hs(snd_usb_substream_t
*subs
,
417 snd_pcm_runtime_t
*runtime
,
420 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
422 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
423 urb
->iso_frame_desc
[0].length
= 4;
424 urb
->iso_frame_desc
[0].offset
= 0;
429 * process after full speed playback sync complete
431 * retrieve the current 10.14 frequency from pipe, and set it.
432 * the value is referred in prepare_playback_urb().
434 static int retire_playback_sync_urb(snd_usb_substream_t
*subs
,
435 snd_pcm_runtime_t
*runtime
,
441 if (urb
->iso_frame_desc
[0].status
== 0 &&
442 urb
->iso_frame_desc
[0].actual_length
== 3) {
443 f
= combine_triple((u8
*)urb
->transfer_buffer
) << 2;
444 if (f
>= subs
->freqn
- subs
->freqn
/ 8 && f
<= subs
->freqmax
) {
445 spin_lock_irqsave(&subs
->lock
, flags
);
447 spin_unlock_irqrestore(&subs
->lock
, flags
);
455 * process after high speed playback sync complete
457 * retrieve the current 12.13 frequency from pipe, and set it.
458 * the value is referred in prepare_playback_urb().
460 static int retire_playback_sync_urb_hs(snd_usb_substream_t
*subs
,
461 snd_pcm_runtime_t
*runtime
,
467 if (urb
->iso_frame_desc
[0].status
== 0 &&
468 urb
->iso_frame_desc
[0].actual_length
== 4) {
469 f
= combine_quad((u8
*)urb
->transfer_buffer
) & 0x0fffffff;
470 if (f
>= subs
->freqn
- subs
->freqn
/ 8 && f
<= subs
->freqmax
) {
471 spin_lock_irqsave(&subs
->lock
, flags
);
473 spin_unlock_irqrestore(&subs
->lock
, flags
);
481 * Prepare urb for streaming before playback starts.
483 * We don't care about (or have) any data, so we just send a transfer delimiter.
485 static int prepare_startup_playback_urb(snd_usb_substream_t
*subs
,
486 snd_pcm_runtime_t
*runtime
,
490 snd_urb_ctx_t
*ctx
= urb
->context
;
492 urb
->dev
= ctx
->subs
->dev
;
493 urb
->number_of_packets
= subs
->packs_per_ms
;
494 for (i
= 0; i
< subs
->packs_per_ms
; ++i
) {
495 urb
->iso_frame_desc
[i
].offset
= 0;
496 urb
->iso_frame_desc
[i
].length
= 0;
498 urb
->transfer_buffer_length
= 0;
503 * prepare urb for playback data pipe
505 * Since a URB can handle only a single linear buffer, we must use double
506 * buffering when the data to be transferred overflows the buffer boundary.
507 * To avoid inconsistencies when updating hwptr_done, we use double buffering
510 static int prepare_playback_urb(snd_usb_substream_t
*subs
,
511 snd_pcm_runtime_t
*runtime
,
517 int period_elapsed
= 0;
518 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
520 stride
= runtime
->frame_bits
>> 3;
523 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
524 urb
->number_of_packets
= 0;
525 spin_lock_irqsave(&subs
->lock
, flags
);
526 for (i
= 0; i
< ctx
->packets
; i
++) {
527 /* calculate the size of a packet */
529 counts
= subs
->maxframesize
; /* fixed */
531 subs
->phase
= (subs
->phase
& 0xffff)
532 + (subs
->freqm
<< subs
->datainterval
);
533 counts
= subs
->phase
>> 16;
534 if (counts
> subs
->maxframesize
)
535 counts
= subs
->maxframesize
;
537 /* set up descriptor */
538 urb
->iso_frame_desc
[i
].offset
= offs
* stride
;
539 urb
->iso_frame_desc
[i
].length
= counts
* stride
;
541 urb
->number_of_packets
++;
542 subs
->transfer_done
+= counts
;
543 if (subs
->transfer_done
>= runtime
->period_size
) {
544 subs
->transfer_done
-= runtime
->period_size
;
546 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
) {
547 if (subs
->transfer_done
> 0) {
548 /* FIXME: fill-max mode is not
550 offs
-= subs
->transfer_done
;
551 counts
-= subs
->transfer_done
;
552 urb
->iso_frame_desc
[i
].length
=
554 subs
->transfer_done
= 0;
557 if (i
< ctx
->packets
) {
558 /* add a transfer delimiter */
559 urb
->iso_frame_desc
[i
].offset
=
561 urb
->iso_frame_desc
[i
].length
= 0;
562 urb
->number_of_packets
++;
567 /* finish at the frame boundary at/after the period boundary */
568 if (period_elapsed
&&
569 (i
& (subs
->packs_per_ms
- 1)) == subs
->packs_per_ms
- 1)
572 if (subs
->hwptr_done
+ offs
> runtime
->buffer_size
) {
573 /* err, the transferred area goes over buffer boundary. */
574 unsigned int len
= runtime
->buffer_size
- subs
->hwptr_done
;
575 memcpy(urb
->transfer_buffer
,
576 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
578 memcpy(urb
->transfer_buffer
+ len
* stride
,
580 (offs
- len
) * stride
);
582 memcpy(urb
->transfer_buffer
,
583 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
586 subs
->hwptr_done
+= offs
;
587 if (subs
->hwptr_done
>= runtime
->buffer_size
)
588 subs
->hwptr_done
-= runtime
->buffer_size
;
589 spin_unlock_irqrestore(&subs
->lock
, flags
);
590 urb
->transfer_buffer_length
= offs
* stride
;
592 snd_pcm_period_elapsed(subs
->pcm_substream
);
597 * process after playback data complete
600 static int retire_playback_urb(snd_usb_substream_t
*subs
,
601 snd_pcm_runtime_t
*runtime
,
610 static struct snd_urb_ops audio_urb_ops
[2] = {
612 .prepare
= prepare_startup_playback_urb
,
613 .retire
= retire_playback_urb
,
614 .prepare_sync
= prepare_playback_sync_urb
,
615 .retire_sync
= retire_playback_sync_urb
,
618 .prepare
= prepare_capture_urb
,
619 .retire
= retire_capture_urb
,
620 .prepare_sync
= prepare_capture_sync_urb
,
621 .retire_sync
= retire_capture_sync_urb
,
625 static struct snd_urb_ops audio_urb_ops_high_speed
[2] = {
627 .prepare
= prepare_startup_playback_urb
,
628 .retire
= retire_playback_urb
,
629 .prepare_sync
= prepare_playback_sync_urb_hs
,
630 .retire_sync
= retire_playback_sync_urb_hs
,
633 .prepare
= prepare_capture_urb
,
634 .retire
= retire_capture_urb
,
635 .prepare_sync
= prepare_capture_sync_urb_hs
,
636 .retire_sync
= retire_capture_sync_urb
,
641 * complete callback from data urb
643 static void snd_complete_urb(struct urb
*urb
, struct pt_regs
*regs
)
645 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
646 snd_usb_substream_t
*subs
= ctx
->subs
;
647 snd_pcm_substream_t
*substream
= ctx
->subs
->pcm_substream
;
650 if ((subs
->running
&& subs
->ops
.retire(subs
, substream
->runtime
, urb
)) ||
651 ! subs
->running
|| /* can be stopped during retire callback */
652 (err
= subs
->ops
.prepare(subs
, substream
->runtime
, urb
)) < 0 ||
653 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
654 clear_bit(ctx
->index
, &subs
->active_mask
);
656 snd_printd(KERN_ERR
"cannot submit urb (err = %d)\n", err
);
657 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
664 * complete callback from sync urb
666 static void snd_complete_sync_urb(struct urb
*urb
, struct pt_regs
*regs
)
668 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
669 snd_usb_substream_t
*subs
= ctx
->subs
;
670 snd_pcm_substream_t
*substream
= ctx
->subs
->pcm_substream
;
673 if ((subs
->running
&& subs
->ops
.retire_sync(subs
, substream
->runtime
, urb
)) ||
674 ! subs
->running
|| /* can be stopped during retire callback */
675 (err
= subs
->ops
.prepare_sync(subs
, substream
->runtime
, urb
)) < 0 ||
676 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
677 clear_bit(ctx
->index
+ 16, &subs
->active_mask
);
679 snd_printd(KERN_ERR
"cannot submit sync urb (err = %d)\n", err
);
680 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
686 /* get the physical page pointer at the given offset */
687 static struct page
*snd_pcm_get_vmalloc_page(snd_pcm_substream_t
*subs
,
688 unsigned long offset
)
690 void *pageptr
= subs
->runtime
->dma_area
+ offset
;
691 return vmalloc_to_page(pageptr
);
694 /* allocate virtual buffer; may be called more than once */
695 static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t
*subs
, size_t size
)
697 snd_pcm_runtime_t
*runtime
= subs
->runtime
;
698 if (runtime
->dma_area
) {
699 if (runtime
->dma_bytes
>= size
)
700 return 0; /* already large enough */
701 vfree(runtime
->dma_area
);
703 runtime
->dma_area
= vmalloc(size
);
704 if (! runtime
->dma_area
)
706 runtime
->dma_bytes
= size
;
710 /* free virtual buffer; may be called more than once */
711 static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t
*subs
)
713 snd_pcm_runtime_t
*runtime
= subs
->runtime
;
714 if (runtime
->dma_area
) {
715 vfree(runtime
->dma_area
);
716 runtime
->dma_area
= NULL
;
723 * unlink active urbs.
725 static int deactivate_urbs(snd_usb_substream_t
*subs
, int force
, int can_sleep
)
732 if (!force
&& subs
->stream
->chip
->shutdown
) /* to be sure... */
735 async
= !can_sleep
&& async_unlink
;
737 if (! async
&& in_interrupt())
740 for (i
= 0; i
< subs
->nurbs
; i
++) {
741 if (test_bit(i
, &subs
->active_mask
)) {
742 if (! test_and_set_bit(i
, &subs
->unlink_mask
)) {
743 struct urb
*u
= subs
->dataurb
[i
].urb
;
751 if (subs
->syncpipe
) {
752 for (i
= 0; i
< SYNC_URBS
; i
++) {
753 if (test_bit(i
+16, &subs
->active_mask
)) {
754 if (! test_and_set_bit(i
+16, &subs
->unlink_mask
)) {
755 struct urb
*u
= subs
->syncurb
[i
].urb
;
769 * set up and start data/sync urbs
771 static int start_urbs(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
)
776 if (subs
->stream
->chip
->shutdown
)
779 for (i
= 0; i
< subs
->nurbs
; i
++) {
780 snd_assert(subs
->dataurb
[i
].urb
, return -EINVAL
);
781 if (subs
->ops
.prepare(subs
, runtime
, subs
->dataurb
[i
].urb
) < 0) {
782 snd_printk(KERN_ERR
"cannot prepare datapipe for urb %d\n", i
);
786 if (subs
->syncpipe
) {
787 for (i
= 0; i
< SYNC_URBS
; i
++) {
788 snd_assert(subs
->syncurb
[i
].urb
, return -EINVAL
);
789 if (subs
->ops
.prepare_sync(subs
, runtime
, subs
->syncurb
[i
].urb
) < 0) {
790 snd_printk(KERN_ERR
"cannot prepare syncpipe for urb %d\n", i
);
796 subs
->active_mask
= 0;
797 subs
->unlink_mask
= 0;
799 for (i
= 0; i
< subs
->nurbs
; i
++) {
800 if ((err
= usb_submit_urb(subs
->dataurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
801 snd_printk(KERN_ERR
"cannot submit datapipe for urb %d, err = %d\n", i
, err
);
804 set_bit(i
, &subs
->active_mask
);
806 if (subs
->syncpipe
) {
807 for (i
= 0; i
< SYNC_URBS
; i
++) {
808 if ((err
= usb_submit_urb(subs
->syncurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
809 snd_printk(KERN_ERR
"cannot submit syncpipe for urb %d, err = %d\n", i
, err
);
812 set_bit(i
+ 16, &subs
->active_mask
);
818 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
819 deactivate_urbs(subs
, 0, 0);
825 * wait until all urbs are processed.
827 static int wait_clear_urbs(snd_usb_substream_t
*subs
)
829 unsigned long end_time
= jiffies
+ msecs_to_jiffies(1000);
835 for (i
= 0; i
< subs
->nurbs
; i
++) {
836 if (test_bit(i
, &subs
->active_mask
))
839 if (subs
->syncpipe
) {
840 for (i
= 0; i
< SYNC_URBS
; i
++) {
841 if (test_bit(i
+ 16, &subs
->active_mask
))
847 schedule_timeout_uninterruptible(1);
848 } while (time_before(jiffies
, end_time
));
850 snd_printk(KERN_ERR
"timeout: still %d active urbs..\n", alive
);
856 * return the current pcm pointer. just return the hwptr_done value.
858 static snd_pcm_uframes_t
snd_usb_pcm_pointer(snd_pcm_substream_t
*substream
)
860 snd_usb_substream_t
*subs
;
861 snd_pcm_uframes_t hwptr_done
;
863 subs
= (snd_usb_substream_t
*)substream
->runtime
->private_data
;
864 spin_lock(&subs
->lock
);
865 hwptr_done
= subs
->hwptr_done
;
866 spin_unlock(&subs
->lock
);
872 * start/stop playback substream
874 static int snd_usb_pcm_playback_trigger(snd_pcm_substream_t
*substream
,
877 snd_usb_substream_t
*subs
= substream
->runtime
->private_data
;
880 case SNDRV_PCM_TRIGGER_START
:
881 subs
->ops
.prepare
= prepare_playback_urb
;
883 case SNDRV_PCM_TRIGGER_STOP
:
884 return deactivate_urbs(subs
, 0, 0);
891 * start/stop capture substream
893 static int snd_usb_pcm_capture_trigger(snd_pcm_substream_t
*substream
,
896 snd_usb_substream_t
*subs
= substream
->runtime
->private_data
;
899 case SNDRV_PCM_TRIGGER_START
:
900 return start_urbs(subs
, substream
->runtime
);
901 case SNDRV_PCM_TRIGGER_STOP
:
902 return deactivate_urbs(subs
, 0, 0);
912 static void release_urb_ctx(snd_urb_ctx_t
*u
)
916 usb_buffer_free(u
->subs
->dev
, u
->buffer_size
,
917 u
->urb
->transfer_buffer
,
918 u
->urb
->transfer_dma
);
919 usb_free_urb(u
->urb
);
925 * release a substream
927 static void release_substream_urbs(snd_usb_substream_t
*subs
, int force
)
931 /* stop urbs (to be sure) */
932 deactivate_urbs(subs
, force
, 1);
933 wait_clear_urbs(subs
);
935 for (i
= 0; i
< MAX_URBS
; i
++)
936 release_urb_ctx(&subs
->dataurb
[i
]);
937 for (i
= 0; i
< SYNC_URBS
; i
++)
938 release_urb_ctx(&subs
->syncurb
[i
]);
939 usb_buffer_free(subs
->dev
, SYNC_URBS
* 4,
940 subs
->syncbuf
, subs
->sync_dma
);
941 subs
->syncbuf
= NULL
;
946 * initialize a substream for plaback/capture
948 static int init_substream_urbs(snd_usb_substream_t
*subs
, unsigned int period_bytes
,
949 unsigned int rate
, unsigned int frame_bits
)
951 unsigned int maxsize
, n
, i
;
952 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
953 unsigned int npacks
[MAX_URBS
], urb_packs
, total_packs
, packs_per_ms
;
955 /* calculate the frequency in 16.16 format */
956 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
957 subs
->freqn
= get_usb_full_speed_rate(rate
);
959 subs
->freqn
= get_usb_high_speed_rate(rate
);
960 subs
->freqm
= subs
->freqn
;
961 /* calculate max. frequency */
962 if (subs
->maxpacksize
) {
963 /* whatever fits into a max. size packet */
964 maxsize
= subs
->maxpacksize
;
965 subs
->freqmax
= (maxsize
/ (frame_bits
>> 3))
966 << (16 - subs
->datainterval
);
968 /* no max. packet size: just take 25% higher than nominal */
969 subs
->freqmax
= subs
->freqn
+ (subs
->freqn
>> 2);
970 maxsize
= ((subs
->freqmax
+ 0xffff) * (frame_bits
>> 3))
971 >> (16 - subs
->datainterval
);
976 subs
->curpacksize
= subs
->maxpacksize
;
978 subs
->curpacksize
= maxsize
;
980 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
)
981 packs_per_ms
= 8 >> subs
->datainterval
;
984 subs
->packs_per_ms
= packs_per_ms
;
988 urb_packs
= max(urb_packs
, (unsigned int)MIN_PACKS_URB
);
989 urb_packs
= min(urb_packs
, (unsigned int)MAX_PACKS
);
992 urb_packs
*= packs_per_ms
;
994 /* decide how many packets to be used */
996 unsigned int minsize
;
997 /* determine how small a packet can be */
998 minsize
= (subs
->freqn
>> (16 - subs
->datainterval
))
1000 /* with sync from device, assume it can be 12% lower */
1002 minsize
-= minsize
>> 3;
1003 minsize
= max(minsize
, 1u);
1004 total_packs
= (period_bytes
+ minsize
- 1) / minsize
;
1005 /* round up to multiple of packs_per_ms */
1006 total_packs
= (total_packs
+ packs_per_ms
- 1)
1007 & ~(packs_per_ms
- 1);
1008 /* we need at least two URBs for queueing */
1009 if (total_packs
< 2 * MIN_PACKS_URB
* packs_per_ms
)
1010 total_packs
= 2 * MIN_PACKS_URB
* packs_per_ms
;
1012 total_packs
= MAX_URBS
* urb_packs
;
1014 subs
->nurbs
= (total_packs
+ urb_packs
- 1) / urb_packs
;
1015 if (subs
->nurbs
> MAX_URBS
) {
1017 subs
->nurbs
= MAX_URBS
;
1018 total_packs
= MAX_URBS
* urb_packs
;
1021 for (i
= 0; i
< subs
->nurbs
; i
++) {
1022 npacks
[i
] = n
> urb_packs
? urb_packs
: n
;
1025 if (subs
->nurbs
<= 1) {
1026 /* too little - we need at least two packets
1027 * to ensure contiguous playback/capture
1030 npacks
[0] = (total_packs
+ 1) / 2;
1031 npacks
[1] = total_packs
- npacks
[0];
1032 } else if (npacks
[subs
->nurbs
-1] < MIN_PACKS_URB
* packs_per_ms
) {
1033 /* the last packet is too small.. */
1034 if (subs
->nurbs
> 2) {
1035 /* merge to the first one */
1036 npacks
[0] += npacks
[subs
->nurbs
- 1];
1041 npacks
[0] = (total_packs
+ 1) / 2;
1042 npacks
[1] = total_packs
- npacks
[0];
1046 /* allocate and initialize data urbs */
1047 for (i
= 0; i
< subs
->nurbs
; i
++) {
1048 snd_urb_ctx_t
*u
= &subs
->dataurb
[i
];
1051 u
->packets
= npacks
[i
];
1052 u
->buffer_size
= maxsize
* u
->packets
;
1053 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
)
1054 u
->packets
++; /* for transfer delimiter */
1055 u
->urb
= usb_alloc_urb(u
->packets
, GFP_KERNEL
);
1058 u
->urb
->transfer_buffer
=
1059 usb_buffer_alloc(subs
->dev
, u
->buffer_size
, GFP_KERNEL
,
1060 &u
->urb
->transfer_dma
);
1061 if (! u
->urb
->transfer_buffer
)
1063 u
->urb
->pipe
= subs
->datapipe
;
1064 u
->urb
->transfer_flags
= URB_ISO_ASAP
| URB_NO_TRANSFER_DMA_MAP
;
1065 u
->urb
->interval
= 1 << subs
->datainterval
;
1066 u
->urb
->context
= u
;
1067 u
->urb
->complete
= snd_complete_urb
;
1070 if (subs
->syncpipe
) {
1071 /* allocate and initialize sync urbs */
1072 subs
->syncbuf
= usb_buffer_alloc(subs
->dev
, SYNC_URBS
* 4,
1073 GFP_KERNEL
, &subs
->sync_dma
);
1074 if (! subs
->syncbuf
)
1076 for (i
= 0; i
< SYNC_URBS
; i
++) {
1077 snd_urb_ctx_t
*u
= &subs
->syncurb
[i
];
1081 u
->urb
= usb_alloc_urb(1, GFP_KERNEL
);
1084 u
->urb
->transfer_buffer
= subs
->syncbuf
+ i
* 4;
1085 u
->urb
->transfer_dma
= subs
->sync_dma
+ i
* 4;
1086 u
->urb
->transfer_buffer_length
= 4;
1087 u
->urb
->pipe
= subs
->syncpipe
;
1088 u
->urb
->transfer_flags
= URB_ISO_ASAP
|
1089 URB_NO_TRANSFER_DMA_MAP
;
1090 u
->urb
->number_of_packets
= 1;
1091 u
->urb
->interval
= 1 << subs
->syncinterval
;
1092 u
->urb
->context
= u
;
1093 u
->urb
->complete
= snd_complete_sync_urb
;
1099 release_substream_urbs(subs
, 0);
1105 * find a matching audio format
1107 static struct audioformat
*find_format(snd_usb_substream_t
*subs
, unsigned int format
,
1108 unsigned int rate
, unsigned int channels
)
1110 struct list_head
*p
;
1111 struct audioformat
*found
= NULL
;
1112 int cur_attr
= 0, attr
;
1114 list_for_each(p
, &subs
->fmt_list
) {
1115 struct audioformat
*fp
;
1116 fp
= list_entry(p
, struct audioformat
, list
);
1117 if (fp
->format
!= format
|| fp
->channels
!= channels
)
1119 if (rate
< fp
->rate_min
|| rate
> fp
->rate_max
)
1121 if (! (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)) {
1123 for (i
= 0; i
< fp
->nr_rates
; i
++)
1124 if (fp
->rate_table
[i
] == rate
)
1126 if (i
>= fp
->nr_rates
)
1129 attr
= fp
->ep_attr
& EP_ATTR_MASK
;
1135 /* avoid async out and adaptive in if the other method
1136 * supports the same format.
1137 * this is a workaround for the case like
1138 * M-audio audiophile USB.
1140 if (attr
!= cur_attr
) {
1141 if ((attr
== EP_ATTR_ASYNC
&&
1142 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1143 (attr
== EP_ATTR_ADAPTIVE
&&
1144 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
))
1146 if ((cur_attr
== EP_ATTR_ASYNC
&&
1147 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1148 (cur_attr
== EP_ATTR_ADAPTIVE
&&
1149 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
)) {
1155 /* find the format with the largest max. packet size */
1156 if (fp
->maxpacksize
> found
->maxpacksize
) {
1166 * initialize the picth control and sample rate
1168 static int init_usb_pitch(struct usb_device
*dev
, int iface
,
1169 struct usb_host_interface
*alts
,
1170 struct audioformat
*fmt
)
1173 unsigned char data
[1];
1176 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1177 /* if endpoint has pitch control, enable it */
1178 if (fmt
->attributes
& EP_CS_ATTR_PITCH_CONTROL
) {
1180 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1181 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1182 PITCH_CONTROL
<< 8, ep
, data
, 1, 1000)) < 0) {
1183 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH\n",
1184 dev
->devnum
, iface
, ep
);
1191 static int init_usb_sample_rate(struct usb_device
*dev
, int iface
,
1192 struct usb_host_interface
*alts
,
1193 struct audioformat
*fmt
, int rate
)
1196 unsigned char data
[3];
1199 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1200 /* if endpoint has sampling rate control, set it */
1201 if (fmt
->attributes
& EP_CS_ATTR_SAMPLE_RATE
) {
1204 data
[1] = rate
>> 8;
1205 data
[2] = rate
>> 16;
1206 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1207 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1208 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1209 snd_printk(KERN_ERR
"%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1210 dev
->devnum
, iface
, fmt
->altsetting
, rate
, ep
);
1213 if ((err
= snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), GET_CUR
,
1214 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_IN
,
1215 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1216 snd_printk(KERN_WARNING
"%d:%d:%d: cannot get freq at ep 0x%x\n",
1217 dev
->devnum
, iface
, fmt
->altsetting
, ep
);
1218 return 0; /* some devices don't support reading */
1220 crate
= data
[0] | (data
[1] << 8) | (data
[2] << 16);
1221 if (crate
!= rate
) {
1222 snd_printd(KERN_WARNING
"current rate %d is different from the runtime rate %d\n", crate
, rate
);
1223 // runtime->rate = crate;
1230 * find a matching format and set up the interface
1232 static int set_format(snd_usb_substream_t
*subs
, struct audioformat
*fmt
)
1234 struct usb_device
*dev
= subs
->dev
;
1235 struct usb_host_interface
*alts
;
1236 struct usb_interface_descriptor
*altsd
;
1237 struct usb_interface
*iface
;
1238 unsigned int ep
, attr
;
1239 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
1242 iface
= usb_ifnum_to_if(dev
, fmt
->iface
);
1243 snd_assert(iface
, return -EINVAL
);
1244 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1245 altsd
= get_iface_desc(alts
);
1246 snd_assert(altsd
->bAlternateSetting
== fmt
->altsetting
, return -EINVAL
);
1248 if (fmt
== subs
->cur_audiofmt
)
1251 /* close the old interface */
1252 if (subs
->interface
>= 0 && subs
->interface
!= fmt
->iface
) {
1253 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1254 subs
->interface
= -1;
1259 if (subs
->interface
!= fmt
->iface
|| subs
->format
!= fmt
->altset_idx
) {
1260 if (usb_set_interface(dev
, fmt
->iface
, fmt
->altsetting
) < 0) {
1261 snd_printk(KERN_ERR
"%d:%d:%d: usb_set_interface failed\n",
1262 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1265 snd_printdd(KERN_INFO
"setting usb interface %d:%d\n", fmt
->iface
, fmt
->altsetting
);
1266 subs
->interface
= fmt
->iface
;
1267 subs
->format
= fmt
->altset_idx
;
1270 /* create a data pipe */
1271 ep
= fmt
->endpoint
& USB_ENDPOINT_NUMBER_MASK
;
1273 subs
->datapipe
= usb_sndisocpipe(dev
, ep
);
1275 subs
->datapipe
= usb_rcvisocpipe(dev
, ep
);
1276 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
&&
1277 get_endpoint(alts
, 0)->bInterval
>= 1 &&
1278 get_endpoint(alts
, 0)->bInterval
<= 4)
1279 subs
->datainterval
= get_endpoint(alts
, 0)->bInterval
- 1;
1281 subs
->datainterval
= 0;
1282 subs
->syncpipe
= subs
->syncinterval
= 0;
1283 subs
->maxpacksize
= fmt
->maxpacksize
;
1286 /* we need a sync pipe in async OUT or adaptive IN mode */
1287 /* check the number of EP, since some devices have broken
1288 * descriptors which fool us. if it has only one EP,
1289 * assume it as adaptive-out or sync-in.
1291 attr
= fmt
->ep_attr
& EP_ATTR_MASK
;
1292 if (((is_playback
&& attr
== EP_ATTR_ASYNC
) ||
1293 (! is_playback
&& attr
== EP_ATTR_ADAPTIVE
)) &&
1294 altsd
->bNumEndpoints
>= 2) {
1295 /* check sync-pipe endpoint */
1296 /* ... and check descriptor size before accessing bSynchAddress
1297 because there is a version of the SB Audigy 2 NX firmware lacking
1298 the audio fields in the endpoint descriptors */
1299 if ((get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) != 0x01 ||
1300 (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1301 get_endpoint(alts
, 1)->bSynchAddress
!= 0)) {
1302 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1303 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1306 ep
= get_endpoint(alts
, 1)->bEndpointAddress
;
1307 if (get_endpoint(alts
, 0)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1308 (( is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
| USB_DIR_IN
)) ||
1309 (!is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
& ~USB_DIR_IN
)))) {
1310 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1311 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1314 ep
&= USB_ENDPOINT_NUMBER_MASK
;
1316 subs
->syncpipe
= usb_rcvisocpipe(dev
, ep
);
1318 subs
->syncpipe
= usb_sndisocpipe(dev
, ep
);
1319 if (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1320 get_endpoint(alts
, 1)->bRefresh
>= 1 &&
1321 get_endpoint(alts
, 1)->bRefresh
<= 9)
1322 subs
->syncinterval
= get_endpoint(alts
, 1)->bRefresh
;
1323 else if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
1324 subs
->syncinterval
= 1;
1325 else if (get_endpoint(alts
, 1)->bInterval
>= 1 &&
1326 get_endpoint(alts
, 1)->bInterval
<= 16)
1327 subs
->syncinterval
= get_endpoint(alts
, 1)->bInterval
- 1;
1329 subs
->syncinterval
= 3;
1332 /* always fill max packet size */
1333 if (fmt
->attributes
& EP_CS_ATTR_FILL_MAX
)
1336 if ((err
= init_usb_pitch(dev
, subs
->interface
, alts
, fmt
)) < 0)
1339 subs
->cur_audiofmt
= fmt
;
1342 printk("setting done: format = %d, rate = %d, channels = %d\n",
1343 fmt
->format
, fmt
->rate
, fmt
->channels
);
1344 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1345 subs
->datapipe
, subs
->syncpipe
);
1352 * hw_params callback
1354 * allocate a buffer and set the given audio format.
1356 * so far we use a physically linear buffer although packetize transfer
1357 * doesn't need a continuous area.
1358 * if sg buffer is supported on the later version of alsa, we'll follow
1361 static int snd_usb_hw_params(snd_pcm_substream_t
*substream
,
1362 snd_pcm_hw_params_t
*hw_params
)
1364 snd_usb_substream_t
*subs
= (snd_usb_substream_t
*)substream
->runtime
->private_data
;
1365 struct audioformat
*fmt
;
1366 unsigned int channels
, rate
, format
;
1369 ret
= snd_pcm_alloc_vmalloc_buffer(substream
,
1370 params_buffer_bytes(hw_params
));
1374 format
= params_format(hw_params
);
1375 rate
= params_rate(hw_params
);
1376 channels
= params_channels(hw_params
);
1377 fmt
= find_format(subs
, format
, rate
, channels
);
1379 snd_printd(KERN_DEBUG
"cannot set format: format = %s, rate = %d, channels = %d\n",
1380 snd_pcm_format_name(format
), rate
, channels
);
1384 changed
= subs
->cur_audiofmt
!= fmt
||
1385 subs
->period_bytes
!= params_period_bytes(hw_params
) ||
1386 subs
->cur_rate
!= rate
;
1387 if ((ret
= set_format(subs
, fmt
)) < 0)
1390 if (subs
->cur_rate
!= rate
) {
1391 struct usb_host_interface
*alts
;
1392 struct usb_interface
*iface
;
1393 iface
= usb_ifnum_to_if(subs
->dev
, fmt
->iface
);
1394 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1395 ret
= init_usb_sample_rate(subs
->dev
, subs
->interface
, alts
, fmt
, rate
);
1398 subs
->cur_rate
= rate
;
1402 /* format changed */
1403 release_substream_urbs(subs
, 0);
1404 /* influenced: period_bytes, channels, rate, format, */
1405 ret
= init_substream_urbs(subs
, params_period_bytes(hw_params
),
1406 params_rate(hw_params
),
1407 snd_pcm_format_physical_width(params_format(hw_params
)) * params_channels(hw_params
));
1416 * reset the audio format and release the buffer
1418 static int snd_usb_hw_free(snd_pcm_substream_t
*substream
)
1420 snd_usb_substream_t
*subs
= (snd_usb_substream_t
*)substream
->runtime
->private_data
;
1422 subs
->cur_audiofmt
= NULL
;
1424 subs
->period_bytes
= 0;
1425 release_substream_urbs(subs
, 0);
1426 return snd_pcm_free_vmalloc_buffer(substream
);
1432 * only a few subtle things...
1434 static int snd_usb_pcm_prepare(snd_pcm_substream_t
*substream
)
1436 snd_pcm_runtime_t
*runtime
= substream
->runtime
;
1437 snd_usb_substream_t
*subs
= runtime
->private_data
;
1439 if (! subs
->cur_audiofmt
) {
1440 snd_printk(KERN_ERR
"usbaudio: no format is specified!\n");
1444 /* some unit conversions in runtime */
1445 subs
->maxframesize
= bytes_to_frames(runtime
, subs
->maxpacksize
);
1446 subs
->curframesize
= bytes_to_frames(runtime
, subs
->curpacksize
);
1448 /* reset the pointer */
1449 subs
->hwptr_done
= 0;
1450 subs
->transfer_done
= 0;
1453 /* clear urbs (to be sure) */
1454 deactivate_urbs(subs
, 0, 1);
1455 wait_clear_urbs(subs
);
1457 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1458 * updates for all URBs would happen at the same time when starting */
1459 if (subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) {
1460 subs
->ops
.prepare
= prepare_startup_playback_urb
;
1461 return start_urbs(subs
, runtime
);
1466 static snd_pcm_hardware_t snd_usb_playback
=
1468 .info
= SNDRV_PCM_INFO_MMAP
|
1469 SNDRV_PCM_INFO_MMAP_VALID
|
1470 SNDRV_PCM_INFO_BATCH
|
1471 SNDRV_PCM_INFO_INTERLEAVED
|
1472 SNDRV_PCM_INFO_BLOCK_TRANSFER
,
1473 .buffer_bytes_max
= 1024 * 1024,
1474 .period_bytes_min
= 64,
1475 .period_bytes_max
= 512 * 1024,
1477 .periods_max
= 1024,
1480 static snd_pcm_hardware_t snd_usb_capture
=
1482 .info
= SNDRV_PCM_INFO_MMAP
|
1483 SNDRV_PCM_INFO_MMAP_VALID
|
1484 SNDRV_PCM_INFO_BATCH
|
1485 SNDRV_PCM_INFO_INTERLEAVED
|
1486 SNDRV_PCM_INFO_BLOCK_TRANSFER
,
1487 .buffer_bytes_max
= 1024 * 1024,
1488 .period_bytes_min
= 64,
1489 .period_bytes_max
= 512 * 1024,
1491 .periods_max
= 1024,
1498 #ifdef HW_CONST_DEBUG
1499 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1501 #define hwc_debug(fmt, args...) /**/
1504 static int hw_check_valid_format(snd_pcm_hw_params_t
*params
, struct audioformat
*fp
)
1506 snd_interval_t
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1507 snd_interval_t
*ct
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1508 snd_mask_t
*fmts
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1510 /* check the format */
1511 if (! snd_mask_test(fmts
, fp
->format
)) {
1512 hwc_debug(" > check: no supported format %d\n", fp
->format
);
1515 /* check the channels */
1516 if (fp
->channels
< ct
->min
|| fp
->channels
> ct
->max
) {
1517 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp
->channels
, ct
->min
, ct
->max
);
1520 /* check the rate is within the range */
1521 if (fp
->rate_min
> it
->max
|| (fp
->rate_min
== it
->max
&& it
->openmax
)) {
1522 hwc_debug(" > check: rate_min %d > max %d\n", fp
->rate_min
, it
->max
);
1525 if (fp
->rate_max
< it
->min
|| (fp
->rate_max
== it
->min
&& it
->openmin
)) {
1526 hwc_debug(" > check: rate_max %d < min %d\n", fp
->rate_max
, it
->min
);
1532 static int hw_rule_rate(snd_pcm_hw_params_t
*params
,
1533 snd_pcm_hw_rule_t
*rule
)
1535 snd_usb_substream_t
*subs
= rule
->private;
1536 struct list_head
*p
;
1537 snd_interval_t
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1538 unsigned int rmin
, rmax
;
1541 hwc_debug("hw_rule_rate: (%d,%d)\n", it
->min
, it
->max
);
1544 list_for_each(p
, &subs
->fmt_list
) {
1545 struct audioformat
*fp
;
1546 fp
= list_entry(p
, struct audioformat
, list
);
1547 if (! hw_check_valid_format(params
, fp
))
1550 if (rmin
> fp
->rate_min
)
1551 rmin
= fp
->rate_min
;
1552 if (rmax
< fp
->rate_max
)
1553 rmax
= fp
->rate_max
;
1555 rmin
= fp
->rate_min
;
1556 rmax
= fp
->rate_max
;
1561 hwc_debug(" --> get empty\n");
1567 if (it
->min
< rmin
) {
1572 if (it
->max
> rmax
) {
1577 if (snd_interval_checkempty(it
)) {
1581 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1586 static int hw_rule_channels(snd_pcm_hw_params_t
*params
,
1587 snd_pcm_hw_rule_t
*rule
)
1589 snd_usb_substream_t
*subs
= rule
->private;
1590 struct list_head
*p
;
1591 snd_interval_t
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1592 unsigned int rmin
, rmax
;
1595 hwc_debug("hw_rule_channels: (%d,%d)\n", it
->min
, it
->max
);
1598 list_for_each(p
, &subs
->fmt_list
) {
1599 struct audioformat
*fp
;
1600 fp
= list_entry(p
, struct audioformat
, list
);
1601 if (! hw_check_valid_format(params
, fp
))
1604 if (rmin
> fp
->channels
)
1605 rmin
= fp
->channels
;
1606 if (rmax
< fp
->channels
)
1607 rmax
= fp
->channels
;
1609 rmin
= fp
->channels
;
1610 rmax
= fp
->channels
;
1615 hwc_debug(" --> get empty\n");
1621 if (it
->min
< rmin
) {
1626 if (it
->max
> rmax
) {
1631 if (snd_interval_checkempty(it
)) {
1635 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1639 static int hw_rule_format(snd_pcm_hw_params_t
*params
,
1640 snd_pcm_hw_rule_t
*rule
)
1642 snd_usb_substream_t
*subs
= rule
->private;
1643 struct list_head
*p
;
1644 snd_mask_t
*fmt
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1649 hwc_debug("hw_rule_format: %x:%x\n", fmt
->bits
[0], fmt
->bits
[1]);
1651 list_for_each(p
, &subs
->fmt_list
) {
1652 struct audioformat
*fp
;
1653 fp
= list_entry(p
, struct audioformat
, list
);
1654 if (! hw_check_valid_format(params
, fp
))
1656 fbits
|= (1ULL << fp
->format
);
1659 oldbits
[0] = fmt
->bits
[0];
1660 oldbits
[1] = fmt
->bits
[1];
1661 fmt
->bits
[0] &= (u32
)fbits
;
1662 fmt
->bits
[1] &= (u32
)(fbits
>> 32);
1663 if (! fmt
->bits
[0] && ! fmt
->bits
[1]) {
1664 hwc_debug(" --> get empty\n");
1667 changed
= (oldbits
[0] != fmt
->bits
[0] || oldbits
[1] != fmt
->bits
[1]);
1668 hwc_debug(" --> %x:%x (changed = %d)\n", fmt
->bits
[0], fmt
->bits
[1], changed
);
1675 * check whether the registered audio formats need special hw-constraints
1677 static int check_hw_params_convention(snd_usb_substream_t
*subs
)
1682 u32 cmaster
, rmaster
;
1683 u32 rate_min
= 0, rate_max
= 0;
1684 struct list_head
*p
;
1687 channels
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1688 rates
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1690 list_for_each(p
, &subs
->fmt_list
) {
1691 struct audioformat
*f
;
1692 f
= list_entry(p
, struct audioformat
, list
);
1693 /* unconventional channels? */
1694 if (f
->channels
> 32)
1696 /* continuous rate min/max matches? */
1697 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1698 if (rate_min
&& f
->rate_min
!= rate_min
)
1700 if (rate_max
&& f
->rate_max
!= rate_max
)
1702 rate_min
= f
->rate_min
;
1703 rate_max
= f
->rate_max
;
1705 /* combination of continuous rates and fixed rates? */
1706 if (rates
[f
->format
] & SNDRV_PCM_RATE_CONTINUOUS
) {
1707 if (f
->rates
!= rates
[f
->format
])
1710 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1711 if (rates
[f
->format
] && rates
[f
->format
] != f
->rates
)
1714 channels
[f
->format
] |= (1 << f
->channels
);
1715 rates
[f
->format
] |= f
->rates
;
1717 /* check whether channels and rates match for all formats */
1718 cmaster
= rmaster
= 0;
1719 for (i
= 0; i
< MAX_MASK
; i
++) {
1720 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1722 if (rmaster
!= rates
[i
] && rmaster
&& rates
[i
])
1725 cmaster
= channels
[i
];
1729 /* check whether channels match for all distinct rates */
1730 memset(channels
, 0, MAX_MASK
* sizeof(u32
));
1731 list_for_each(p
, &subs
->fmt_list
) {
1732 struct audioformat
*f
;
1733 f
= list_entry(p
, struct audioformat
, list
);
1734 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)
1736 for (i
= 0; i
< 32; i
++) {
1737 if (f
->rates
& (1 << i
))
1738 channels
[i
] |= (1 << f
->channels
);
1742 for (i
= 0; i
< 32; i
++) {
1743 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1746 cmaster
= channels
[i
];
1758 * set up the runtime hardware information.
1761 static int setup_hw_info(snd_pcm_runtime_t
*runtime
, snd_usb_substream_t
*subs
)
1763 struct list_head
*p
;
1766 runtime
->hw
.formats
= subs
->formats
;
1768 runtime
->hw
.rate_min
= 0x7fffffff;
1769 runtime
->hw
.rate_max
= 0;
1770 runtime
->hw
.channels_min
= 256;
1771 runtime
->hw
.channels_max
= 0;
1772 runtime
->hw
.rates
= 0;
1773 /* check min/max rates and channels */
1774 list_for_each(p
, &subs
->fmt_list
) {
1775 struct audioformat
*fp
;
1776 fp
= list_entry(p
, struct audioformat
, list
);
1777 runtime
->hw
.rates
|= fp
->rates
;
1778 if (runtime
->hw
.rate_min
> fp
->rate_min
)
1779 runtime
->hw
.rate_min
= fp
->rate_min
;
1780 if (runtime
->hw
.rate_max
< fp
->rate_max
)
1781 runtime
->hw
.rate_max
= fp
->rate_max
;
1782 if (runtime
->hw
.channels_min
> fp
->channels
)
1783 runtime
->hw
.channels_min
= fp
->channels
;
1784 if (runtime
->hw
.channels_max
< fp
->channels
)
1785 runtime
->hw
.channels_max
= fp
->channels
;
1786 if (fp
->fmt_type
== USB_FORMAT_TYPE_II
&& fp
->frame_size
> 0) {
1787 /* FIXME: there might be more than one audio formats... */
1788 runtime
->hw
.period_bytes_min
= runtime
->hw
.period_bytes_max
=
1793 /* set the period time minimum 1ms */
1794 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1795 1000 * MIN_PACKS_URB
,
1796 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX
);
1798 if (check_hw_params_convention(subs
)) {
1799 hwc_debug("setting extra hw constraints...\n");
1800 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1802 SNDRV_PCM_HW_PARAM_FORMAT
,
1803 SNDRV_PCM_HW_PARAM_CHANNELS
,
1806 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1807 hw_rule_channels
, subs
,
1808 SNDRV_PCM_HW_PARAM_FORMAT
,
1809 SNDRV_PCM_HW_PARAM_RATE
,
1812 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1813 hw_rule_format
, subs
,
1814 SNDRV_PCM_HW_PARAM_RATE
,
1815 SNDRV_PCM_HW_PARAM_CHANNELS
,
1822 static int snd_usb_pcm_open(snd_pcm_substream_t
*substream
, int direction
,
1823 snd_pcm_hardware_t
*hw
)
1825 snd_usb_stream_t
*as
= snd_pcm_substream_chip(substream
);
1826 snd_pcm_runtime_t
*runtime
= substream
->runtime
;
1827 snd_usb_substream_t
*subs
= &as
->substream
[direction
];
1829 subs
->interface
= -1;
1832 runtime
->private_data
= subs
;
1833 subs
->pcm_substream
= substream
;
1834 return setup_hw_info(runtime
, subs
);
1837 static int snd_usb_pcm_close(snd_pcm_substream_t
*substream
, int direction
)
1839 snd_usb_stream_t
*as
= snd_pcm_substream_chip(substream
);
1840 snd_usb_substream_t
*subs
= &as
->substream
[direction
];
1842 if (subs
->interface
>= 0) {
1843 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1844 subs
->interface
= -1;
1846 subs
->pcm_substream
= NULL
;
1850 static int snd_usb_playback_open(snd_pcm_substream_t
*substream
)
1852 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_PLAYBACK
, &snd_usb_playback
);
1855 static int snd_usb_playback_close(snd_pcm_substream_t
*substream
)
1857 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
1860 static int snd_usb_capture_open(snd_pcm_substream_t
*substream
)
1862 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_CAPTURE
, &snd_usb_capture
);
1865 static int snd_usb_capture_close(snd_pcm_substream_t
*substream
)
1867 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_CAPTURE
);
1870 static snd_pcm_ops_t snd_usb_playback_ops
= {
1871 .open
= snd_usb_playback_open
,
1872 .close
= snd_usb_playback_close
,
1873 .ioctl
= snd_pcm_lib_ioctl
,
1874 .hw_params
= snd_usb_hw_params
,
1875 .hw_free
= snd_usb_hw_free
,
1876 .prepare
= snd_usb_pcm_prepare
,
1877 .trigger
= snd_usb_pcm_playback_trigger
,
1878 .pointer
= snd_usb_pcm_pointer
,
1879 .page
= snd_pcm_get_vmalloc_page
,
1882 static snd_pcm_ops_t snd_usb_capture_ops
= {
1883 .open
= snd_usb_capture_open
,
1884 .close
= snd_usb_capture_close
,
1885 .ioctl
= snd_pcm_lib_ioctl
,
1886 .hw_params
= snd_usb_hw_params
,
1887 .hw_free
= snd_usb_hw_free
,
1888 .prepare
= snd_usb_pcm_prepare
,
1889 .trigger
= snd_usb_pcm_capture_trigger
,
1890 .pointer
= snd_usb_pcm_pointer
,
1891 .page
= snd_pcm_get_vmalloc_page
,
1901 * combine bytes and get an integer value
1903 unsigned int snd_usb_combine_bytes(unsigned char *bytes
, int size
)
1906 case 1: return *bytes
;
1907 case 2: return combine_word(bytes
);
1908 case 3: return combine_triple(bytes
);
1909 case 4: return combine_quad(bytes
);
1915 * parse descriptor buffer and return the pointer starting the given
1918 void *snd_usb_find_desc(void *descstart
, int desclen
, void *after
, u8 dtype
)
1930 if (p
[1] == dtype
&& (!after
|| (void *)p
> after
)) {
1939 * find a class-specified interface descriptor with the given subtype.
1941 void *snd_usb_find_csint_desc(void *buffer
, int buflen
, void *after
, u8 dsubtype
)
1943 unsigned char *p
= after
;
1945 while ((p
= snd_usb_find_desc(buffer
, buflen
, p
,
1946 USB_DT_CS_INTERFACE
)) != NULL
) {
1947 if (p
[0] >= 3 && p
[2] == dsubtype
)
1954 * Wrapper for usb_control_msg().
1955 * Allocates a temp buffer to prevent dmaing from/to the stack.
1957 int snd_usb_ctl_msg(struct usb_device
*dev
, unsigned int pipe
, __u8 request
,
1958 __u8 requesttype
, __u16 value
, __u16 index
, void *data
,
1959 __u16 size
, int timeout
)
1965 buf
= kmalloc(size
, GFP_KERNEL
);
1968 memcpy(buf
, data
, size
);
1970 err
= usb_control_msg(dev
, pipe
, request
, requesttype
,
1971 value
, index
, buf
, size
, timeout
);
1973 memcpy(data
, buf
, size
);
1981 * entry point for linux usb interface
1984 static int usb_audio_probe(struct usb_interface
*intf
,
1985 const struct usb_device_id
*id
);
1986 static void usb_audio_disconnect(struct usb_interface
*intf
);
1988 static struct usb_device_id usb_audio_ids
[] = {
1989 #include "usbquirks.h"
1990 { .match_flags
= (USB_DEVICE_ID_MATCH_INT_CLASS
| USB_DEVICE_ID_MATCH_INT_SUBCLASS
),
1991 .bInterfaceClass
= USB_CLASS_AUDIO
,
1992 .bInterfaceSubClass
= USB_SUBCLASS_AUDIO_CONTROL
},
1993 { } /* Terminating entry */
1996 MODULE_DEVICE_TABLE (usb
, usb_audio_ids
);
1998 static struct usb_driver usb_audio_driver
= {
1999 .owner
= THIS_MODULE
,
2000 .name
= "snd-usb-audio",
2001 .probe
= usb_audio_probe
,
2002 .disconnect
= usb_audio_disconnect
,
2003 .id_table
= usb_audio_ids
,
2008 * proc interface for list the supported pcm formats
2010 static void proc_dump_substream_formats(snd_usb_substream_t
*subs
, snd_info_buffer_t
*buffer
)
2012 struct list_head
*p
;
2013 static char *sync_types
[4] = {
2014 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2017 list_for_each(p
, &subs
->fmt_list
) {
2018 struct audioformat
*fp
;
2019 fp
= list_entry(p
, struct audioformat
, list
);
2020 snd_iprintf(buffer
, " Interface %d\n", fp
->iface
);
2021 snd_iprintf(buffer
, " Altset %d\n", fp
->altsetting
);
2022 snd_iprintf(buffer
, " Format: %s\n", snd_pcm_format_name(fp
->format
));
2023 snd_iprintf(buffer
, " Channels: %d\n", fp
->channels
);
2024 snd_iprintf(buffer
, " Endpoint: %d %s (%s)\n",
2025 fp
->endpoint
& USB_ENDPOINT_NUMBER_MASK
,
2026 fp
->endpoint
& USB_DIR_IN
? "IN" : "OUT",
2027 sync_types
[(fp
->ep_attr
& EP_ATTR_MASK
) >> 2]);
2028 if (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
2029 snd_iprintf(buffer
, " Rates: %d - %d (continuous)\n",
2030 fp
->rate_min
, fp
->rate_max
);
2033 snd_iprintf(buffer
, " Rates: ");
2034 for (i
= 0; i
< fp
->nr_rates
; i
++) {
2036 snd_iprintf(buffer
, ", ");
2037 snd_iprintf(buffer
, "%d", fp
->rate_table
[i
]);
2039 snd_iprintf(buffer
, "\n");
2041 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2042 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2046 static void proc_dump_substream_status(snd_usb_substream_t
*subs
, snd_info_buffer_t
*buffer
)
2048 if (subs
->running
) {
2050 snd_iprintf(buffer
, " Status: Running\n");
2051 snd_iprintf(buffer
, " Interface = %d\n", subs
->interface
);
2052 snd_iprintf(buffer
, " Altset = %d\n", subs
->format
);
2053 snd_iprintf(buffer
, " URBs = %d [ ", subs
->nurbs
);
2054 for (i
= 0; i
< subs
->nurbs
; i
++)
2055 snd_iprintf(buffer
, "%d ", subs
->dataurb
[i
].packets
);
2056 snd_iprintf(buffer
, "]\n");
2057 snd_iprintf(buffer
, " Packet Size = %d\n", subs
->curpacksize
);
2058 snd_iprintf(buffer
, " Momentary freq = %u Hz (%#x.%04x)\n",
2059 snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
2060 ? get_full_speed_hz(subs
->freqm
)
2061 : get_high_speed_hz(subs
->freqm
),
2062 subs
->freqm
>> 16, subs
->freqm
& 0xffff);
2064 snd_iprintf(buffer
, " Status: Stop\n");
2068 static void proc_pcm_format_read(snd_info_entry_t
*entry
, snd_info_buffer_t
*buffer
)
2070 snd_usb_stream_t
*stream
= entry
->private_data
;
2072 snd_iprintf(buffer
, "%s : %s\n", stream
->chip
->card
->longname
, stream
->pcm
->name
);
2074 if (stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
].num_formats
) {
2075 snd_iprintf(buffer
, "\nPlayback:\n");
2076 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2077 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2079 if (stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
].num_formats
) {
2080 snd_iprintf(buffer
, "\nCapture:\n");
2081 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2082 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2086 static void proc_pcm_format_add(snd_usb_stream_t
*stream
)
2088 snd_info_entry_t
*entry
;
2090 snd_card_t
*card
= stream
->chip
->card
;
2092 sprintf(name
, "stream%d", stream
->pcm_index
);
2093 if (! snd_card_proc_new(card
, name
, &entry
))
2094 snd_info_set_text_ops(entry
, stream
, 1024, proc_pcm_format_read
);
2099 * initialize the substream instance.
2102 static void init_substream(snd_usb_stream_t
*as
, int stream
, struct audioformat
*fp
)
2104 snd_usb_substream_t
*subs
= &as
->substream
[stream
];
2106 INIT_LIST_HEAD(&subs
->fmt_list
);
2107 spin_lock_init(&subs
->lock
);
2110 subs
->direction
= stream
;
2111 subs
->dev
= as
->chip
->dev
;
2112 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
2113 subs
->ops
= audio_urb_ops
[stream
];
2115 subs
->ops
= audio_urb_ops_high_speed
[stream
];
2116 snd_pcm_set_ops(as
->pcm
, stream
,
2117 stream
== SNDRV_PCM_STREAM_PLAYBACK
?
2118 &snd_usb_playback_ops
: &snd_usb_capture_ops
);
2120 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2121 subs
->formats
|= 1ULL << fp
->format
;
2122 subs
->endpoint
= fp
->endpoint
;
2123 subs
->num_formats
++;
2124 subs
->fmt_type
= fp
->fmt_type
;
2131 static void free_substream(snd_usb_substream_t
*subs
)
2133 struct list_head
*p
, *n
;
2135 if (! subs
->num_formats
)
2136 return; /* not initialized */
2137 list_for_each_safe(p
, n
, &subs
->fmt_list
) {
2138 struct audioformat
*fp
= list_entry(p
, struct audioformat
, list
);
2139 kfree(fp
->rate_table
);
2146 * free a usb stream instance
2148 static void snd_usb_audio_stream_free(snd_usb_stream_t
*stream
)
2150 free_substream(&stream
->substream
[0]);
2151 free_substream(&stream
->substream
[1]);
2152 list_del(&stream
->list
);
2156 static void snd_usb_audio_pcm_free(snd_pcm_t
*pcm
)
2158 snd_usb_stream_t
*stream
= pcm
->private_data
;
2161 snd_usb_audio_stream_free(stream
);
2167 * add this endpoint to the chip instance.
2168 * if a stream with the same endpoint already exists, append to it.
2169 * if not, create a new pcm stream.
2171 static int add_audio_endpoint(snd_usb_audio_t
*chip
, int stream
, struct audioformat
*fp
)
2173 struct list_head
*p
;
2174 snd_usb_stream_t
*as
;
2175 snd_usb_substream_t
*subs
;
2179 list_for_each(p
, &chip
->pcm_list
) {
2180 as
= list_entry(p
, snd_usb_stream_t
, list
);
2181 if (as
->fmt_type
!= fp
->fmt_type
)
2183 subs
= &as
->substream
[stream
];
2184 if (! subs
->endpoint
)
2186 if (subs
->endpoint
== fp
->endpoint
) {
2187 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2188 subs
->num_formats
++;
2189 subs
->formats
|= 1ULL << fp
->format
;
2193 /* look for an empty stream */
2194 list_for_each(p
, &chip
->pcm_list
) {
2195 as
= list_entry(p
, snd_usb_stream_t
, list
);
2196 if (as
->fmt_type
!= fp
->fmt_type
)
2198 subs
= &as
->substream
[stream
];
2201 err
= snd_pcm_new_stream(as
->pcm
, stream
, 1);
2204 init_substream(as
, stream
, fp
);
2208 /* create a new pcm */
2209 as
= kmalloc(sizeof(*as
), GFP_KERNEL
);
2212 memset(as
, 0, sizeof(*as
));
2213 as
->pcm_index
= chip
->pcm_devs
;
2215 as
->fmt_type
= fp
->fmt_type
;
2216 err
= snd_pcm_new(chip
->card
, "USB Audio", chip
->pcm_devs
,
2217 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 1 : 0,
2218 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 0 : 1,
2225 pcm
->private_data
= as
;
2226 pcm
->private_free
= snd_usb_audio_pcm_free
;
2227 pcm
->info_flags
= 0;
2228 if (chip
->pcm_devs
> 0)
2229 sprintf(pcm
->name
, "USB Audio #%d", chip
->pcm_devs
);
2231 strcpy(pcm
->name
, "USB Audio");
2233 init_substream(as
, stream
, fp
);
2235 list_add(&as
->list
, &chip
->pcm_list
);
2238 proc_pcm_format_add(as
);
2245 * check if the device uses big-endian samples
2247 static int is_big_endian_format(snd_usb_audio_t
*chip
, struct audioformat
*fp
)
2249 switch (chip
->usb_id
) {
2250 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2251 if (fp
->endpoint
& USB_DIR_IN
)
2254 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2261 * parse the audio format type I descriptor
2262 * and returns the corresponding pcm format
2265 * @fp: audioformat record
2266 * @format: the format tag (wFormatTag)
2267 * @fmt: the format type descriptor
2269 static int parse_audio_format_i_type(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2270 int format
, unsigned char *fmt
)
2273 int sample_width
, sample_bytes
;
2275 /* FIXME: correct endianess and sign? */
2277 sample_width
= fmt
[6];
2278 sample_bytes
= fmt
[5];
2280 case 0: /* some devices don't define this correctly... */
2281 snd_printdd(KERN_INFO
"%d:%u:%d : format type 0 is detected, processed as PCM\n",
2282 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2284 case USB_AUDIO_FORMAT_PCM
:
2285 if (sample_width
> sample_bytes
* 8) {
2286 snd_printk(KERN_INFO
"%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2287 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
,
2288 sample_width
, sample_bytes
);
2290 /* check the format byte size */
2293 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2296 if (is_big_endian_format(chip
, fp
))
2297 pcm_format
= SNDRV_PCM_FORMAT_S16_BE
; /* grrr, big endian!! */
2299 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2302 if (is_big_endian_format(chip
, fp
))
2303 pcm_format
= SNDRV_PCM_FORMAT_S24_3BE
; /* grrr, big endian!! */
2305 pcm_format
= SNDRV_PCM_FORMAT_S24_3LE
;
2308 pcm_format
= SNDRV_PCM_FORMAT_S32_LE
;
2311 snd_printk(KERN_INFO
"%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2312 chip
->dev
->devnum
, fp
->iface
,
2313 fp
->altsetting
, sample_width
, sample_bytes
);
2317 case USB_AUDIO_FORMAT_PCM8
:
2318 /* Dallas DS4201 workaround */
2319 if (chip
->usb_id
== USB_ID(0x04fa, 0x4201))
2320 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2322 pcm_format
= SNDRV_PCM_FORMAT_U8
;
2324 case USB_AUDIO_FORMAT_IEEE_FLOAT
:
2325 pcm_format
= SNDRV_PCM_FORMAT_FLOAT_LE
;
2327 case USB_AUDIO_FORMAT_ALAW
:
2328 pcm_format
= SNDRV_PCM_FORMAT_A_LAW
;
2330 case USB_AUDIO_FORMAT_MU_LAW
:
2331 pcm_format
= SNDRV_PCM_FORMAT_MU_LAW
;
2334 snd_printk(KERN_INFO
"%d:%u:%d : unsupported format type %d\n",
2335 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2343 * parse the format descriptor and stores the possible sample rates
2344 * on the audioformat table.
2347 * @fp: audioformat record
2348 * @fmt: the format descriptor
2349 * @offset: the start offset of descriptor pointing the rate type
2350 * (7 for type I and II, 8 for type II)
2352 static int parse_audio_format_rates(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2353 unsigned char *fmt
, int offset
)
2355 int nr_rates
= fmt
[offset
];
2356 if (fmt
[0] < offset
+ 1 + 3 * (nr_rates
? nr_rates
: 2)) {
2357 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2358 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2364 * build the rate table and bitmap flags
2367 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2368 static unsigned int conv_rates
[] = {
2369 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2370 64000, 88200, 96000, 176400, 192000
2372 fp
->rate_table
= kmalloc(sizeof(int) * nr_rates
, GFP_KERNEL
);
2373 if (fp
->rate_table
== NULL
) {
2374 snd_printk(KERN_ERR
"cannot malloc\n");
2378 fp
->nr_rates
= nr_rates
;
2379 fp
->rate_min
= fp
->rate_max
= combine_triple(&fmt
[8]);
2380 for (r
= 0, idx
= offset
+ 1; r
< nr_rates
; r
++, idx
+= 3) {
2381 unsigned int rate
= fp
->rate_table
[r
] = combine_triple(&fmt
[idx
]);
2382 if (rate
< fp
->rate_min
)
2383 fp
->rate_min
= rate
;
2384 else if (rate
> fp
->rate_max
)
2385 fp
->rate_max
= rate
;
2386 for (c
= 0; c
< (int)ARRAY_SIZE(conv_rates
); c
++) {
2387 if (rate
== conv_rates
[c
]) {
2388 fp
->rates
|= (1 << c
);
2394 /* continuous rates */
2395 fp
->rates
= SNDRV_PCM_RATE_CONTINUOUS
;
2396 fp
->rate_min
= combine_triple(&fmt
[offset
+ 1]);
2397 fp
->rate_max
= combine_triple(&fmt
[offset
+ 4]);
2403 * parse the format type I and III descriptors
2405 static int parse_audio_format_i(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2406 int format
, unsigned char *fmt
)
2410 if (fmt
[3] == USB_FORMAT_TYPE_III
) {
2411 /* FIXME: the format type is really IECxxx
2412 * but we give normal PCM format to get the existing
2415 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2417 pcm_format
= parse_audio_format_i_type(chip
, fp
, format
, fmt
);
2421 fp
->format
= pcm_format
;
2422 fp
->channels
= fmt
[4];
2423 if (fp
->channels
< 1) {
2424 snd_printk(KERN_ERR
"%d:%u:%d : invalid channels %d\n",
2425 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fp
->channels
);
2428 return parse_audio_format_rates(chip
, fp
, fmt
, 7);
2432 * prase the format type II descriptor
2434 static int parse_audio_format_ii(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2435 int format
, unsigned char *fmt
)
2437 int brate
, framesize
;
2439 case USB_AUDIO_FORMAT_AC3
:
2440 /* FIXME: there is no AC3 format defined yet */
2441 // fp->format = SNDRV_PCM_FORMAT_AC3;
2442 fp
->format
= SNDRV_PCM_FORMAT_U8
; /* temporarily hack to receive byte streams */
2444 case USB_AUDIO_FORMAT_MPEG
:
2445 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2448 snd_printd(KERN_INFO
"%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
2449 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2450 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2454 brate
= combine_word(&fmt
[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2455 framesize
= combine_word(&fmt
[6]); /* fmt[6,7]: wSamplesPerFrame */
2456 snd_printd(KERN_INFO
"found format II with max.bitrate = %d, frame size=%d\n", brate
, framesize
);
2457 fp
->frame_size
= framesize
;
2458 return parse_audio_format_rates(chip
, fp
, fmt
, 8); /* fmt[8..] sample rates */
2461 static int parse_audio_format(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2462 int format
, unsigned char *fmt
, int stream
)
2467 case USB_FORMAT_TYPE_I
:
2468 case USB_FORMAT_TYPE_III
:
2469 err
= parse_audio_format_i(chip
, fp
, format
, fmt
);
2471 case USB_FORMAT_TYPE_II
:
2472 err
= parse_audio_format_ii(chip
, fp
, format
, fmt
);
2475 snd_printd(KERN_INFO
"%d:%u:%d : format type %d is not supported yet\n",
2476 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fmt
[3]);
2479 fp
->fmt_type
= fmt
[3];
2483 /* FIXME: temporary hack for extigy/audigy 2 nx */
2484 /* extigy apparently supports sample rates other than 48k
2485 * but not in ordinary way. so we enable only 48k atm.
2487 if (chip
->usb_id
== USB_ID(0x041e, 0x3000) ||
2488 chip
->usb_id
== USB_ID(0x041e, 0x3020)) {
2489 if (fmt
[3] == USB_FORMAT_TYPE_I
&&
2490 fp
->rates
!= SNDRV_PCM_RATE_48000
&&
2491 fp
->rates
!= SNDRV_PCM_RATE_96000
)
2498 static int parse_audio_endpoints(snd_usb_audio_t
*chip
, int iface_no
)
2500 struct usb_device
*dev
;
2501 struct usb_interface
*iface
;
2502 struct usb_host_interface
*alts
;
2503 struct usb_interface_descriptor
*altsd
;
2504 int i
, altno
, err
, stream
;
2506 struct audioformat
*fp
;
2507 unsigned char *fmt
, *csep
;
2511 /* parse the interface's altsettings */
2512 iface
= usb_ifnum_to_if(dev
, iface_no
);
2513 for (i
= 0; i
< iface
->num_altsetting
; i
++) {
2514 alts
= &iface
->altsetting
[i
];
2515 altsd
= get_iface_desc(alts
);
2516 /* skip invalid one */
2517 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2518 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2519 (altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
&&
2520 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_VENDOR_SPEC
) ||
2521 altsd
->bNumEndpoints
< 1 ||
2522 le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
) == 0)
2524 /* must be isochronous */
2525 if ((get_endpoint(alts
, 0)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) !=
2526 USB_ENDPOINT_XFER_ISOC
)
2528 /* check direction */
2529 stream
= (get_endpoint(alts
, 0)->bEndpointAddress
& USB_DIR_IN
) ?
2530 SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2531 altno
= altsd
->bAlternateSetting
;
2533 /* get audio formats */
2534 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, AS_GENERAL
);
2536 snd_printk(KERN_ERR
"%d:%u:%d : AS_GENERAL descriptor not found\n",
2537 dev
->devnum
, iface_no
, altno
);
2542 snd_printk(KERN_ERR
"%d:%u:%d : invalid AS_GENERAL desc\n",
2543 dev
->devnum
, iface_no
, altno
);
2547 format
= (fmt
[6] << 8) | fmt
[5]; /* remember the format value */
2549 /* get format type */
2550 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, FORMAT_TYPE
);
2552 snd_printk(KERN_ERR
"%d:%u:%d : no FORMAT_TYPE desc\n",
2553 dev
->devnum
, iface_no
, altno
);
2557 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2558 dev
->devnum
, iface_no
, altno
);
2562 csep
= snd_usb_find_desc(alts
->endpoint
[0].extra
, alts
->endpoint
[0].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2563 /* Creamware Noah has this descriptor after the 2nd endpoint */
2564 if (!csep
&& altsd
->bNumEndpoints
>= 2)
2565 csep
= snd_usb_find_desc(alts
->endpoint
[1].extra
, alts
->endpoint
[1].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2566 if (!csep
|| csep
[0] < 7 || csep
[2] != EP_GENERAL
) {
2567 snd_printk(KERN_ERR
"%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2568 dev
->devnum
, iface_no
, altno
);
2572 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2574 snd_printk(KERN_ERR
"cannot malloc\n");
2578 memset(fp
, 0, sizeof(*fp
));
2579 fp
->iface
= iface_no
;
2580 fp
->altsetting
= altno
;
2582 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2583 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2584 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2585 if (snd_usb_get_speed(dev
) == USB_SPEED_HIGH
)
2586 fp
->maxpacksize
= (((fp
->maxpacksize
>> 11) & 3) + 1)
2587 * (fp
->maxpacksize
& 0x7ff);
2588 fp
->attributes
= csep
[3];
2590 /* some quirks for attributes here */
2592 switch (chip
->usb_id
) {
2593 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2594 /* Optoplay sets the sample rate attribute although
2595 * it seems not supporting it in fact.
2597 fp
->attributes
&= ~EP_CS_ATTR_SAMPLE_RATE
;
2599 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2600 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2601 /* doesn't set the sample rate attribute, but supports it */
2602 fp
->attributes
|= EP_CS_ATTR_SAMPLE_RATE
;
2604 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2605 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2606 an older model 77d:223) */
2608 * plantronics headset and Griffin iMic have set adaptive-in
2609 * although it's really not...
2611 fp
->ep_attr
&= ~EP_ATTR_MASK
;
2612 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2613 fp
->ep_attr
|= EP_ATTR_ADAPTIVE
;
2615 fp
->ep_attr
|= EP_ATTR_SYNC
;
2619 /* ok, let's parse further... */
2620 if (parse_audio_format(chip
, fp
, format
, fmt
, stream
) < 0) {
2621 kfree(fp
->rate_table
);
2626 snd_printdd(KERN_INFO
"%d:%u:%d: add audio endpoint 0x%x\n", dev
->devnum
, iface_no
, i
, fp
->endpoint
);
2627 err
= add_audio_endpoint(chip
, stream
, fp
);
2629 kfree(fp
->rate_table
);
2633 /* try to set the interface... */
2634 usb_set_interface(chip
->dev
, iface_no
, altno
);
2635 init_usb_pitch(chip
->dev
, iface_no
, alts
, fp
);
2636 init_usb_sample_rate(chip
->dev
, iface_no
, alts
, fp
, fp
->rate_max
);
2643 * disconnect streams
2644 * called from snd_usb_audio_disconnect()
2646 static void snd_usb_stream_disconnect(struct list_head
*head
)
2649 snd_usb_stream_t
*as
;
2650 snd_usb_substream_t
*subs
;
2652 as
= list_entry(head
, snd_usb_stream_t
, list
);
2653 for (idx
= 0; idx
< 2; idx
++) {
2654 subs
= &as
->substream
[idx
];
2655 if (!subs
->num_formats
)
2657 release_substream_urbs(subs
, 1);
2658 subs
->interface
= -1;
2663 * parse audio control descriptor and create pcm/midi streams
2665 static int snd_usb_create_streams(snd_usb_audio_t
*chip
, int ctrlif
)
2667 struct usb_device
*dev
= chip
->dev
;
2668 struct usb_host_interface
*host_iface
;
2669 struct usb_interface
*iface
;
2673 /* find audiocontrol interface */
2674 host_iface
= &usb_ifnum_to_if(dev
, ctrlif
)->altsetting
[0];
2675 if (!(p1
= snd_usb_find_csint_desc(host_iface
->extra
, host_iface
->extralen
, NULL
, HEADER
))) {
2676 snd_printk(KERN_ERR
"cannot find HEADER\n");
2679 if (! p1
[7] || p1
[0] < 8 + p1
[7]) {
2680 snd_printk(KERN_ERR
"invalid HEADER\n");
2685 * parse all USB audio streaming interfaces
2687 for (i
= 0; i
< p1
[7]; i
++) {
2688 struct usb_host_interface
*alts
;
2689 struct usb_interface_descriptor
*altsd
;
2691 iface
= usb_ifnum_to_if(dev
, j
);
2693 snd_printk(KERN_ERR
"%d:%u:%d : does not exist\n",
2694 dev
->devnum
, ctrlif
, j
);
2697 if (usb_interface_claimed(iface
)) {
2698 snd_printdd(KERN_INFO
"%d:%d:%d: skipping, already claimed\n", dev
->devnum
, ctrlif
, j
);
2701 alts
= &iface
->altsetting
[0];
2702 altsd
= get_iface_desc(alts
);
2703 if ((altsd
->bInterfaceClass
== USB_CLASS_AUDIO
||
2704 altsd
->bInterfaceClass
== USB_CLASS_VENDOR_SPEC
) &&
2705 altsd
->bInterfaceSubClass
== USB_SUBCLASS_MIDI_STREAMING
) {
2706 if (snd_usb_create_midi_interface(chip
, iface
, NULL
) < 0) {
2707 snd_printk(KERN_ERR
"%d:%u:%d: cannot create sequencer device\n", dev
->devnum
, ctrlif
, j
);
2710 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2713 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2714 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2715 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
) {
2716 snd_printdd(KERN_ERR
"%d:%u:%d: skipping non-supported interface %d\n", dev
->devnum
, ctrlif
, j
, altsd
->bInterfaceClass
);
2717 /* skip non-supported classes */
2720 if (! parse_audio_endpoints(chip
, j
)) {
2721 usb_set_interface(dev
, j
, 0); /* reset the current interface */
2722 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2730 * create a stream for an endpoint/altsetting without proper descriptors
2732 static int create_fixed_stream_quirk(snd_usb_audio_t
*chip
,
2733 struct usb_interface
*iface
,
2734 const snd_usb_audio_quirk_t
*quirk
)
2736 struct audioformat
*fp
;
2737 struct usb_host_interface
*alts
;
2739 int *rate_table
= NULL
;
2741 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2743 snd_printk(KERN_ERR
"cannot malloc\n");
2746 memcpy(fp
, quirk
->data
, sizeof(*fp
));
2747 if (fp
->nr_rates
> 0) {
2748 rate_table
= kmalloc(sizeof(int) * fp
->nr_rates
, GFP_KERNEL
);
2753 memcpy(rate_table
, fp
->rate_table
, sizeof(int) * fp
->nr_rates
);
2754 fp
->rate_table
= rate_table
;
2757 stream
= (fp
->endpoint
& USB_DIR_IN
)
2758 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2759 err
= add_audio_endpoint(chip
, stream
, fp
);
2765 if (fp
->iface
!= get_iface_desc(&iface
->altsetting
[0])->bInterfaceNumber
||
2766 fp
->altset_idx
>= iface
->num_altsetting
) {
2771 alts
= &iface
->altsetting
[fp
->altset_idx
];
2772 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2773 init_usb_pitch(chip
->dev
, fp
->iface
, alts
, fp
);
2774 init_usb_sample_rate(chip
->dev
, fp
->iface
, alts
, fp
, fp
->rate_max
);
2779 * create a stream for an interface with proper descriptors
2781 static int create_standard_audio_quirk(snd_usb_audio_t
*chip
,
2782 struct usb_interface
*iface
,
2783 const snd_usb_audio_quirk_t
*quirk
)
2785 struct usb_host_interface
*alts
;
2786 struct usb_interface_descriptor
*altsd
;
2789 alts
= &iface
->altsetting
[0];
2790 altsd
= get_iface_desc(alts
);
2791 err
= parse_audio_endpoints(chip
, altsd
->bInterfaceNumber
);
2793 snd_printk(KERN_ERR
"cannot setup if %d: error %d\n",
2794 altsd
->bInterfaceNumber
, err
);
2797 /* reset the current interface */
2798 usb_set_interface(chip
->dev
, altsd
->bInterfaceNumber
, 0);
2803 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2804 * to detect the sample rate is by looking at wMaxPacketSize.
2806 static int create_ua700_ua25_quirk(snd_usb_audio_t
*chip
,
2807 struct usb_interface
*iface
,
2808 const snd_usb_audio_quirk_t
*quirk
)
2810 static const struct audioformat ua_format
= {
2811 .format
= SNDRV_PCM_FORMAT_S24_3LE
,
2813 .fmt_type
= USB_FORMAT_TYPE_I
,
2816 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2818 struct usb_host_interface
*alts
;
2819 struct usb_interface_descriptor
*altsd
;
2820 struct audioformat
*fp
;
2823 /* both PCM and MIDI interfaces have 2 altsettings */
2824 if (iface
->num_altsetting
!= 2)
2826 alts
= &iface
->altsetting
[1];
2827 altsd
= get_iface_desc(alts
);
2829 if (altsd
->bNumEndpoints
== 2) {
2830 static const snd_usb_midi_endpoint_info_t ua700_ep
= {
2831 .out_cables
= 0x0003,
2834 static const snd_usb_audio_quirk_t ua700_quirk
= {
2835 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2838 static const snd_usb_midi_endpoint_info_t ua25_ep
= {
2839 .out_cables
= 0x0001,
2842 static const snd_usb_audio_quirk_t ua25_quirk
= {
2843 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2846 if (chip
->usb_id
== USB_ID(0x0582, 0x002b))
2847 return snd_usb_create_midi_interface(chip
, iface
,
2850 return snd_usb_create_midi_interface(chip
, iface
,
2854 if (altsd
->bNumEndpoints
!= 1)
2857 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2860 memcpy(fp
, &ua_format
, sizeof(*fp
));
2862 fp
->iface
= altsd
->bInterfaceNumber
;
2863 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2864 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2865 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2867 switch (fp
->maxpacksize
) {
2869 fp
->rate_max
= fp
->rate_min
= 44100;
2873 fp
->rate_max
= fp
->rate_min
= 48000;
2877 fp
->rate_max
= fp
->rate_min
= 96000;
2880 snd_printk(KERN_ERR
"unknown sample rate\n");
2885 stream
= (fp
->endpoint
& USB_DIR_IN
)
2886 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2887 err
= add_audio_endpoint(chip
, stream
, fp
);
2892 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2897 * Create a stream for an Edirol UA-1000 interface.
2899 static int create_ua1000_quirk(snd_usb_audio_t
*chip
,
2900 struct usb_interface
*iface
,
2901 const snd_usb_audio_quirk_t
*quirk
)
2903 static const struct audioformat ua1000_format
= {
2904 .format
= SNDRV_PCM_FORMAT_S32_LE
,
2905 .fmt_type
= USB_FORMAT_TYPE_I
,
2909 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2911 struct usb_host_interface
*alts
;
2912 struct usb_interface_descriptor
*altsd
;
2913 struct audioformat
*fp
;
2916 if (iface
->num_altsetting
!= 2)
2918 alts
= &iface
->altsetting
[1];
2919 altsd
= get_iface_desc(alts
);
2920 if (alts
->extralen
!= 11 || alts
->extra
[1] != CS_AUDIO_INTERFACE
||
2921 altsd
->bNumEndpoints
!= 1)
2924 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2927 memcpy(fp
, &ua1000_format
, sizeof(*fp
));
2929 fp
->channels
= alts
->extra
[4];
2930 fp
->iface
= altsd
->bInterfaceNumber
;
2931 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2932 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2933 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2934 fp
->rate_max
= fp
->rate_min
= combine_triple(&alts
->extra
[8]);
2936 stream
= (fp
->endpoint
& USB_DIR_IN
)
2937 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2938 err
= add_audio_endpoint(chip
, stream
, fp
);
2943 /* FIXME: playback must be synchronized to capture */
2944 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2948 static int snd_usb_create_quirk(snd_usb_audio_t
*chip
,
2949 struct usb_interface
*iface
,
2950 const snd_usb_audio_quirk_t
*quirk
);
2953 * handle the quirks for the contained interfaces
2955 static int create_composite_quirk(snd_usb_audio_t
*chip
,
2956 struct usb_interface
*iface
,
2957 const snd_usb_audio_quirk_t
*quirk
)
2959 int probed_ifnum
= get_iface_desc(iface
->altsetting
)->bInterfaceNumber
;
2962 for (quirk
= quirk
->data
; quirk
->ifnum
>= 0; ++quirk
) {
2963 iface
= usb_ifnum_to_if(chip
->dev
, quirk
->ifnum
);
2966 if (quirk
->ifnum
!= probed_ifnum
&&
2967 usb_interface_claimed(iface
))
2969 err
= snd_usb_create_quirk(chip
, iface
, quirk
);
2972 if (quirk
->ifnum
!= probed_ifnum
)
2973 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2978 static int ignore_interface_quirk(snd_usb_audio_t
*chip
,
2979 struct usb_interface
*iface
,
2980 const snd_usb_audio_quirk_t
*quirk
)
2990 #define EXTIGY_FIRMWARE_SIZE_OLD 794
2991 #define EXTIGY_FIRMWARE_SIZE_NEW 483
2993 static int snd_usb_extigy_boot_quirk(struct usb_device
*dev
, struct usb_interface
*intf
)
2995 struct usb_host_config
*config
= dev
->actconfig
;
2998 if (le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_OLD
||
2999 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_NEW
) {
3000 snd_printdd("sending Extigy boot sequence...\n");
3001 /* Send message to force it to reconnect with full interface. */
3002 err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
,0),
3003 0x10, 0x43, 0x0001, 0x000a, NULL
, 0, 1000);
3004 if (err
< 0) snd_printdd("error sending boot message: %d\n", err
);
3005 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0,
3006 &dev
->descriptor
, sizeof(dev
->descriptor
));
3007 config
= dev
->actconfig
;
3008 if (err
< 0) snd_printdd("error usb_get_descriptor: %d\n", err
);
3009 err
= usb_reset_configuration(dev
);
3010 if (err
< 0) snd_printdd("error usb_reset_configuration: %d\n", err
);
3011 snd_printdd("extigy_boot: new boot length = %d\n",
3012 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
));
3013 return -ENODEV
; /* quit this anyway */
3018 static int snd_usb_audigy2nx_boot_quirk(struct usb_device
*dev
)
3022 snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), 0x2a,
3023 USB_DIR_IN
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3024 0, 0, &buf
, 1, 1000);
3026 snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), 0x29,
3027 USB_DIR_OUT
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3028 1, 2000, NULL
, 0, 1000);
3036 * audio-interface quirks
3038 * returns zero if no standard audio/MIDI parsing is needed.
3039 * returns a postive value if standard audio/midi interfaces are parsed
3041 * returns a negative value at error.
3043 static int snd_usb_create_quirk(snd_usb_audio_t
*chip
,
3044 struct usb_interface
*iface
,
3045 const snd_usb_audio_quirk_t
*quirk
)
3047 typedef int (*quirk_func_t
)(snd_usb_audio_t
*, struct usb_interface
*,
3048 const snd_usb_audio_quirk_t
*);
3049 static const quirk_func_t quirk_funcs
[] = {
3050 [QUIRK_IGNORE_INTERFACE
] = ignore_interface_quirk
,
3051 [QUIRK_COMPOSITE
] = create_composite_quirk
,
3052 [QUIRK_MIDI_STANDARD_INTERFACE
] = snd_usb_create_midi_interface
,
3053 [QUIRK_MIDI_FIXED_ENDPOINT
] = snd_usb_create_midi_interface
,
3054 [QUIRK_MIDI_YAMAHA
] = snd_usb_create_midi_interface
,
3055 [QUIRK_MIDI_MIDIMAN
] = snd_usb_create_midi_interface
,
3056 [QUIRK_MIDI_NOVATION
] = snd_usb_create_midi_interface
,
3057 [QUIRK_MIDI_RAW
] = snd_usb_create_midi_interface
,
3058 [QUIRK_MIDI_EMAGIC
] = snd_usb_create_midi_interface
,
3059 [QUIRK_MIDI_MIDITECH
] = snd_usb_create_midi_interface
,
3060 [QUIRK_AUDIO_STANDARD_INTERFACE
] = create_standard_audio_quirk
,
3061 [QUIRK_AUDIO_FIXED_ENDPOINT
] = create_fixed_stream_quirk
,
3062 [QUIRK_AUDIO_EDIROL_UA700_UA25
] = create_ua700_ua25_quirk
,
3063 [QUIRK_AUDIO_EDIROL_UA1000
] = create_ua1000_quirk
,
3066 if (quirk
->type
< QUIRK_TYPE_COUNT
) {
3067 return quirk_funcs
[quirk
->type
](chip
, iface
, quirk
);
3069 snd_printd(KERN_ERR
"invalid quirk type %d\n", quirk
->type
);
3076 * common proc files to show the usb device info
3078 static void proc_audio_usbbus_read(snd_info_entry_t
*entry
, snd_info_buffer_t
*buffer
)
3080 snd_usb_audio_t
*chip
= entry
->private_data
;
3081 if (! chip
->shutdown
)
3082 snd_iprintf(buffer
, "%03d/%03d\n", chip
->dev
->bus
->busnum
, chip
->dev
->devnum
);
3085 static void proc_audio_usbid_read(snd_info_entry_t
*entry
, snd_info_buffer_t
*buffer
)
3087 snd_usb_audio_t
*chip
= entry
->private_data
;
3088 if (! chip
->shutdown
)
3089 snd_iprintf(buffer
, "%04x:%04x\n",
3090 USB_ID_VENDOR(chip
->usb_id
),
3091 USB_ID_PRODUCT(chip
->usb_id
));
3094 static void snd_usb_audio_create_proc(snd_usb_audio_t
*chip
)
3096 snd_info_entry_t
*entry
;
3097 if (! snd_card_proc_new(chip
->card
, "usbbus", &entry
))
3098 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbbus_read
);
3099 if (! snd_card_proc_new(chip
->card
, "usbid", &entry
))
3100 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbid_read
);
3104 * free the chip instance
3106 * here we have to do not much, since pcm and controls are already freed
3110 static int snd_usb_audio_free(snd_usb_audio_t
*chip
)
3116 static int snd_usb_audio_dev_free(snd_device_t
*device
)
3118 snd_usb_audio_t
*chip
= device
->device_data
;
3119 return snd_usb_audio_free(chip
);
3124 * create a chip instance and set its names.
3126 static int snd_usb_audio_create(struct usb_device
*dev
, int idx
,
3127 const snd_usb_audio_quirk_t
*quirk
,
3128 snd_usb_audio_t
**rchip
)
3131 snd_usb_audio_t
*chip
;
3134 static snd_device_ops_t ops
= {
3135 .dev_free
= snd_usb_audio_dev_free
,
3140 if (snd_usb_get_speed(dev
) != USB_SPEED_FULL
&&
3141 snd_usb_get_speed(dev
) != USB_SPEED_HIGH
) {
3142 snd_printk(KERN_ERR
"unknown device speed %d\n", snd_usb_get_speed(dev
));
3146 card
= snd_card_new(index
[idx
], id
[idx
], THIS_MODULE
, 0);
3148 snd_printk(KERN_ERR
"cannot create card instance %d\n", idx
);
3152 chip
= kzalloc(sizeof(*chip
), GFP_KERNEL
);
3154 snd_card_free(card
);
3161 chip
->usb_id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3162 le16_to_cpu(dev
->descriptor
.idProduct
));
3163 INIT_LIST_HEAD(&chip
->pcm_list
);
3164 INIT_LIST_HEAD(&chip
->midi_list
);
3165 INIT_LIST_HEAD(&chip
->mixer_list
);
3167 if ((err
= snd_device_new(card
, SNDRV_DEV_LOWLEVEL
, chip
, &ops
)) < 0) {
3168 snd_usb_audio_free(chip
);
3169 snd_card_free(card
);
3173 strcpy(card
->driver
, "USB-Audio");
3174 sprintf(component
, "USB%04x:%04x",
3175 USB_ID_VENDOR(chip
->usb_id
), USB_ID_PRODUCT(chip
->usb_id
));
3176 snd_component_add(card
, component
);
3178 /* retrieve the device string as shortname */
3179 if (quirk
&& quirk
->product_name
) {
3180 strlcpy(card
->shortname
, quirk
->product_name
, sizeof(card
->shortname
));
3182 if (!dev
->descriptor
.iProduct
||
3183 usb_string(dev
, dev
->descriptor
.iProduct
,
3184 card
->shortname
, sizeof(card
->shortname
)) <= 0) {
3185 /* no name available from anywhere, so use ID */
3186 sprintf(card
->shortname
, "USB Device %#04x:%#04x",
3187 USB_ID_VENDOR(chip
->usb_id
),
3188 USB_ID_PRODUCT(chip
->usb_id
));
3192 /* retrieve the vendor and device strings as longname */
3193 if (quirk
&& quirk
->vendor_name
) {
3194 len
= strlcpy(card
->longname
, quirk
->vendor_name
, sizeof(card
->longname
));
3196 if (dev
->descriptor
.iManufacturer
)
3197 len
= usb_string(dev
, dev
->descriptor
.iManufacturer
,
3198 card
->longname
, sizeof(card
->longname
));
3201 /* we don't really care if there isn't any vendor string */
3204 strlcat(card
->longname
, " ", sizeof(card
->longname
));
3206 strlcat(card
->longname
, card
->shortname
, sizeof(card
->longname
));
3208 len
= strlcat(card
->longname
, " at ", sizeof(card
->longname
));
3210 if (len
< sizeof(card
->longname
))
3211 usb_make_path(dev
, card
->longname
+ len
, sizeof(card
->longname
) - len
);
3213 strlcat(card
->longname
,
3214 snd_usb_get_speed(dev
) == USB_SPEED_FULL
? ", full speed" : ", high speed",
3215 sizeof(card
->longname
));
3217 snd_usb_audio_create_proc(chip
);
3225 * probe the active usb device
3227 * note that this can be called multiple times per a device, when it
3228 * includes multiple audio control interfaces.
3230 * thus we check the usb device pointer and creates the card instance
3231 * only at the first time. the successive calls of this function will
3232 * append the pcm interface to the corresponding card.
3234 static void *snd_usb_audio_probe(struct usb_device
*dev
,
3235 struct usb_interface
*intf
,
3236 const struct usb_device_id
*usb_id
)
3238 const snd_usb_audio_quirk_t
*quirk
= (const snd_usb_audio_quirk_t
*)usb_id
->driver_info
;
3240 snd_usb_audio_t
*chip
;
3241 struct usb_host_interface
*alts
;
3245 alts
= &intf
->altsetting
[0];
3246 ifnum
= get_iface_desc(alts
)->bInterfaceNumber
;
3247 id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3248 le16_to_cpu(dev
->descriptor
.idProduct
));
3250 if (quirk
&& quirk
->ifnum
>= 0 && ifnum
!= quirk
->ifnum
)
3253 /* SB Extigy needs special boot-up sequence */
3254 /* if more models come, this will go to the quirk list. */
3255 if (id
== USB_ID(0x041e, 0x3000)) {
3256 if (snd_usb_extigy_boot_quirk(dev
, intf
) < 0)
3259 /* SB Audigy 2 NX needs its own boot-up magic, too */
3260 if (id
== USB_ID(0x041e, 0x3020)) {
3261 if (snd_usb_audigy2nx_boot_quirk(dev
) < 0)
3266 * found a config. now register to ALSA
3269 /* check whether it's already registered */
3271 down(®ister_mutex
);
3272 for (i
= 0; i
< SNDRV_CARDS
; i
++) {
3273 if (usb_chip
[i
] && usb_chip
[i
]->dev
== dev
) {
3274 if (usb_chip
[i
]->shutdown
) {
3275 snd_printk(KERN_ERR
"USB device is in the shutdown state, cannot create a card instance\n");
3283 /* it's a fresh one.
3284 * now look for an empty slot and create a new card instance
3286 for (i
= 0; i
< SNDRV_CARDS
; i
++)
3287 if (enable
[i
] && ! usb_chip
[i
] &&
3288 (vid
[i
] == -1 || vid
[i
] == USB_ID_VENDOR(id
)) &&
3289 (pid
[i
] == -1 || pid
[i
] == USB_ID_PRODUCT(id
))) {
3290 if (snd_usb_audio_create(dev
, i
, quirk
, &chip
) < 0) {
3293 snd_card_set_dev(chip
->card
, &intf
->dev
);
3297 snd_printk(KERN_ERR
"no available usb audio device\n");
3302 err
= 1; /* continue */
3303 if (quirk
&& quirk
->ifnum
!= QUIRK_NO_INTERFACE
) {
3304 /* need some special handlings */
3305 if ((err
= snd_usb_create_quirk(chip
, intf
, quirk
)) < 0)
3310 /* create normal USB audio interfaces */
3311 if (snd_usb_create_streams(chip
, ifnum
) < 0 ||
3312 snd_usb_create_mixer(chip
, ifnum
) < 0) {
3317 /* we are allowed to call snd_card_register() many times */
3318 if (snd_card_register(chip
->card
) < 0) {
3322 usb_chip
[chip
->index
] = chip
;
3323 chip
->num_interfaces
++;
3324 up(®ister_mutex
);
3328 if (chip
&& !chip
->num_interfaces
)
3329 snd_card_free(chip
->card
);
3330 up(®ister_mutex
);
3336 * we need to take care of counter, since disconnection can be called also
3337 * many times as well as usb_audio_probe().
3339 static void snd_usb_audio_disconnect(struct usb_device
*dev
, void *ptr
)
3341 snd_usb_audio_t
*chip
;
3343 struct list_head
*p
;
3345 if (ptr
== (void *)-1L)
3350 down(®ister_mutex
);
3352 chip
->num_interfaces
--;
3353 if (chip
->num_interfaces
<= 0) {
3354 snd_card_disconnect(card
);
3355 /* release the pcm resources */
3356 list_for_each(p
, &chip
->pcm_list
) {
3357 snd_usb_stream_disconnect(p
);
3359 /* release the midi resources */
3360 list_for_each(p
, &chip
->midi_list
) {
3361 snd_usbmidi_disconnect(p
);
3363 /* release mixer resources */
3364 list_for_each(p
, &chip
->mixer_list
) {
3365 snd_usb_mixer_disconnect(p
);
3367 usb_chip
[chip
->index
] = NULL
;
3368 up(®ister_mutex
);
3369 snd_card_free(card
);
3371 up(®ister_mutex
);
3376 * new 2.5 USB kernel API
3378 static int usb_audio_probe(struct usb_interface
*intf
,
3379 const struct usb_device_id
*id
)
3382 chip
= snd_usb_audio_probe(interface_to_usbdev(intf
), intf
, id
);
3384 dev_set_drvdata(&intf
->dev
, chip
);
3390 static void usb_audio_disconnect(struct usb_interface
*intf
)
3392 snd_usb_audio_disconnect(interface_to_usbdev(intf
),
3393 dev_get_drvdata(&intf
->dev
));
3397 static int __init
snd_usb_audio_init(void)
3399 if (nrpacks
< MIN_PACKS_URB
|| nrpacks
> MAX_PACKS
) {
3400 printk(KERN_WARNING
"invalid nrpacks value.\n");
3403 usb_register(&usb_audio_driver
);
3408 static void __exit
snd_usb_audio_cleanup(void)
3410 usb_deregister(&usb_audio_driver
);
3413 module_init(snd_usb_audio_init
);
3414 module_exit(snd_usb_audio_cleanup
);