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 */
106 struct list_head list
;
107 snd_pcm_format_t format
; /* format type */
108 unsigned int channels
; /* # channels */
109 unsigned int fmt_type
; /* USB audio format type (1-3) */
110 unsigned int frame_size
; /* samples per frame for non-audio */
111 int iface
; /* interface number */
112 unsigned char altsetting
; /* corresponding alternate setting */
113 unsigned char altset_idx
; /* array index of altenate setting */
114 unsigned char attributes
; /* corresponding attributes of cs endpoint */
115 unsigned char endpoint
; /* endpoint */
116 unsigned char ep_attr
; /* endpoint attributes */
117 unsigned int maxpacksize
; /* max. packet size */
118 unsigned int rates
; /* rate bitmasks */
119 unsigned int rate_min
, rate_max
; /* min/max rates */
120 unsigned int nr_rates
; /* number of rate table entries */
121 unsigned int *rate_table
; /* rate table */
124 struct snd_usb_substream
;
128 unsigned int buffer_size
; /* size of data buffer, if data URB */
129 struct snd_usb_substream
*subs
;
130 int index
; /* index for urb array */
131 int packets
; /* number of packets per urb */
135 int (*prepare
)(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
, struct urb
*u
);
136 int (*retire
)(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
, struct urb
*u
);
137 int (*prepare_sync
)(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
, struct urb
*u
);
138 int (*retire_sync
)(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
, struct urb
*u
);
141 struct snd_usb_substream
{
142 struct snd_usb_stream
*stream
;
143 struct usb_device
*dev
;
144 struct snd_pcm_substream
*pcm_substream
;
145 int direction
; /* playback or capture */
146 int interface
; /* current interface */
147 int endpoint
; /* assigned endpoint */
148 struct audioformat
*cur_audiofmt
; /* current audioformat pointer (for hw_params callback) */
149 unsigned int cur_rate
; /* current rate (for hw_params callback) */
150 unsigned int period_bytes
; /* current period bytes (for hw_params callback) */
151 unsigned int format
; /* USB data format */
152 unsigned int datapipe
; /* the data i/o pipe */
153 unsigned int syncpipe
; /* 1 - async out or adaptive in */
154 unsigned int datainterval
; /* log_2 of data packet interval */
155 unsigned int syncinterval
; /* P for adaptive mode, 0 otherwise */
156 unsigned int freqn
; /* nominal sampling rate in fs/fps in Q16.16 format */
157 unsigned int freqm
; /* momentary sampling rate in fs/fps in Q16.16 format */
158 unsigned int freqmax
; /* maximum sampling rate, used for buffer management */
159 unsigned int phase
; /* phase accumulator */
160 unsigned int maxpacksize
; /* max packet size in bytes */
161 unsigned int maxframesize
; /* max packet size in frames */
162 unsigned int curpacksize
; /* current packet size in bytes (for capture) */
163 unsigned int curframesize
; /* current packet size in frames (for capture) */
164 unsigned int fill_max
: 1; /* fill max packet size always */
165 unsigned int fmt_type
; /* USB audio format type (1-3) */
166 unsigned int packs_per_ms
; /* packets per millisecond (for playback) */
168 unsigned int running
: 1; /* running status */
170 unsigned int hwptr_done
; /* processed frame position in the buffer */
171 unsigned int transfer_done
; /* processed frames since last period update */
172 unsigned long active_mask
; /* bitmask of active urbs */
173 unsigned long unlink_mask
; /* bitmask of unlinked urbs */
175 unsigned int nurbs
; /* # urbs */
176 struct snd_urb_ctx dataurb
[MAX_URBS
]; /* data urb table */
177 struct snd_urb_ctx syncurb
[SYNC_URBS
]; /* sync urb table */
178 char *syncbuf
; /* sync buffer for all sync URBs */
179 dma_addr_t sync_dma
; /* DMA address of syncbuf */
181 u64 formats
; /* format bitmasks (all or'ed) */
182 unsigned int num_formats
; /* number of supported audio formats (list) */
183 struct list_head fmt_list
; /* format list */
186 struct snd_urb_ops ops
; /* callbacks (must be filled at init) */
190 struct snd_usb_stream
{
191 struct snd_usb_audio
*chip
;
194 unsigned int fmt_type
; /* USB audio format type (1-3) */
195 struct snd_usb_substream substream
[2];
196 struct list_head list
;
201 * we keep the snd_usb_audio_t instances by ourselves for merging
202 * the all interfaces on the same card as one sound device.
205 static DECLARE_MUTEX(register_mutex
);
206 static struct snd_usb_audio
*usb_chip
[SNDRV_CARDS
];
210 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
211 * this will overflow at approx 524 kHz
213 static inline unsigned get_usb_full_speed_rate(unsigned int rate
)
215 return ((rate
<< 13) + 62) / 125;
219 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
220 * this will overflow at approx 4 MHz
222 static inline unsigned get_usb_high_speed_rate(unsigned int rate
)
224 return ((rate
<< 10) + 62) / 125;
227 /* convert our full speed USB rate into sampling rate in Hz */
228 static inline unsigned get_full_speed_hz(unsigned int usb_rate
)
230 return (usb_rate
* 125 + (1 << 12)) >> 13;
233 /* convert our high speed USB rate into sampling rate in Hz */
234 static inline unsigned get_high_speed_hz(unsigned int usb_rate
)
236 return (usb_rate
* 125 + (1 << 9)) >> 10;
241 * prepare urb for full speed capture sync pipe
243 * fill the length and offset of each urb descriptor.
244 * the fixed 10.14 frequency is passed through the pipe.
246 static int prepare_capture_sync_urb(struct snd_usb_substream
*subs
,
247 struct snd_pcm_runtime
*runtime
,
250 unsigned char *cp
= urb
->transfer_buffer
;
251 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
253 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
254 urb
->iso_frame_desc
[0].length
= 3;
255 urb
->iso_frame_desc
[0].offset
= 0;
256 cp
[0] = subs
->freqn
>> 2;
257 cp
[1] = subs
->freqn
>> 10;
258 cp
[2] = subs
->freqn
>> 18;
263 * prepare urb for high speed capture sync pipe
265 * fill the length and offset of each urb descriptor.
266 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
268 static int prepare_capture_sync_urb_hs(struct snd_usb_substream
*subs
,
269 struct snd_pcm_runtime
*runtime
,
272 unsigned char *cp
= urb
->transfer_buffer
;
273 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
275 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
276 urb
->iso_frame_desc
[0].length
= 4;
277 urb
->iso_frame_desc
[0].offset
= 0;
279 cp
[1] = subs
->freqn
>> 8;
280 cp
[2] = subs
->freqn
>> 16;
281 cp
[3] = subs
->freqn
>> 24;
286 * process after capture sync complete
289 static int retire_capture_sync_urb(struct snd_usb_substream
*subs
,
290 struct snd_pcm_runtime
*runtime
,
297 * prepare urb for capture data pipe
299 * fill the offset and length of each descriptor.
301 * we use a temporary buffer to write the captured data.
302 * since the length of written data is determined by host, we cannot
303 * write onto the pcm buffer directly... the data is thus copied
304 * later at complete callback to the global buffer.
306 static int prepare_capture_urb(struct snd_usb_substream
*subs
,
307 struct snd_pcm_runtime
*runtime
,
311 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
314 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
315 for (i
= 0; i
< ctx
->packets
; i
++) {
316 urb
->iso_frame_desc
[i
].offset
= offs
;
317 urb
->iso_frame_desc
[i
].length
= subs
->curpacksize
;
318 offs
+= subs
->curpacksize
;
320 urb
->transfer_buffer_length
= offs
;
321 urb
->number_of_packets
= ctx
->packets
;
323 if (! urb
->bandwidth
) {
325 bustime
= usb_check_bandwidth(urb
->dev
, urb
);
328 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx
->index
, bustime
, urb
->number_of_packets
);
329 usb_claim_bandwidth(urb
->dev
, urb
, bustime
, 1);
336 * process after capture complete
338 * copy the data from each desctiptor to the pcm buffer, and
339 * update the current position.
341 static int retire_capture_urb(struct snd_usb_substream
*subs
,
342 struct snd_pcm_runtime
*runtime
,
348 unsigned int stride
, len
, oldptr
;
349 int period_elapsed
= 0;
351 stride
= runtime
->frame_bits
>> 3;
353 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
354 cp
= (unsigned char *)urb
->transfer_buffer
+ urb
->iso_frame_desc
[i
].offset
;
355 if (urb
->iso_frame_desc
[i
].status
) {
356 snd_printd(KERN_ERR
"frame %d active: %d\n", i
, urb
->iso_frame_desc
[i
].status
);
359 len
= urb
->iso_frame_desc
[i
].actual_length
/ stride
;
362 /* update the current pointer */
363 spin_lock_irqsave(&subs
->lock
, flags
);
364 oldptr
= subs
->hwptr_done
;
365 subs
->hwptr_done
+= len
;
366 if (subs
->hwptr_done
>= runtime
->buffer_size
)
367 subs
->hwptr_done
-= runtime
->buffer_size
;
368 subs
->transfer_done
+= len
;
369 if (subs
->transfer_done
>= runtime
->period_size
) {
370 subs
->transfer_done
-= runtime
->period_size
;
373 spin_unlock_irqrestore(&subs
->lock
, flags
);
374 /* copy a data chunk */
375 if (oldptr
+ len
> runtime
->buffer_size
) {
376 unsigned int cnt
= runtime
->buffer_size
- oldptr
;
377 unsigned int blen
= cnt
* stride
;
378 memcpy(runtime
->dma_area
+ oldptr
* stride
, cp
, blen
);
379 memcpy(runtime
->dma_area
, cp
+ blen
, len
* stride
- blen
);
381 memcpy(runtime
->dma_area
+ oldptr
* stride
, cp
, len
* stride
);
385 snd_pcm_period_elapsed(subs
->pcm_substream
);
391 * prepare urb for full speed playback sync pipe
393 * set up the offset and length to receive the current frequency.
396 static int prepare_playback_sync_urb(struct snd_usb_substream
*subs
,
397 struct snd_pcm_runtime
*runtime
,
400 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
402 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
403 urb
->iso_frame_desc
[0].length
= 3;
404 urb
->iso_frame_desc
[0].offset
= 0;
409 * prepare urb for high speed playback sync pipe
411 * set up the offset and length to receive the current frequency.
414 static int prepare_playback_sync_urb_hs(struct snd_usb_substream
*subs
,
415 struct snd_pcm_runtime
*runtime
,
418 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
420 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
421 urb
->iso_frame_desc
[0].length
= 4;
422 urb
->iso_frame_desc
[0].offset
= 0;
427 * process after full speed playback sync complete
429 * retrieve the current 10.14 frequency from pipe, and set it.
430 * the value is referred in prepare_playback_urb().
432 static int retire_playback_sync_urb(struct snd_usb_substream
*subs
,
433 struct snd_pcm_runtime
*runtime
,
439 if (urb
->iso_frame_desc
[0].status
== 0 &&
440 urb
->iso_frame_desc
[0].actual_length
== 3) {
441 f
= combine_triple((u8
*)urb
->transfer_buffer
) << 2;
442 if (f
>= subs
->freqn
- subs
->freqn
/ 8 && f
<= subs
->freqmax
) {
443 spin_lock_irqsave(&subs
->lock
, flags
);
445 spin_unlock_irqrestore(&subs
->lock
, flags
);
453 * process after high speed playback sync complete
455 * retrieve the current 12.13 frequency from pipe, and set it.
456 * the value is referred in prepare_playback_urb().
458 static int retire_playback_sync_urb_hs(struct snd_usb_substream
*subs
,
459 struct snd_pcm_runtime
*runtime
,
465 if (urb
->iso_frame_desc
[0].status
== 0 &&
466 urb
->iso_frame_desc
[0].actual_length
== 4) {
467 f
= combine_quad((u8
*)urb
->transfer_buffer
) & 0x0fffffff;
468 if (f
>= subs
->freqn
- subs
->freqn
/ 8 && f
<= subs
->freqmax
) {
469 spin_lock_irqsave(&subs
->lock
, flags
);
471 spin_unlock_irqrestore(&subs
->lock
, flags
);
478 /* determine the number of frames in the next packet */
479 static int snd_usb_audio_next_packet_size(struct snd_usb_substream
*subs
)
482 return subs
->maxframesize
;
484 subs
->phase
= (subs
->phase
& 0xffff)
485 + (subs
->freqm
<< subs
->datainterval
);
486 return min(subs
->phase
>> 16, subs
->maxframesize
);
491 * Prepare urb for streaming before playback starts.
493 * We don't yet have data, so we send a frame of silence.
495 static int prepare_startup_playback_urb(struct snd_usb_substream
*subs
,
496 struct snd_pcm_runtime
*runtime
,
499 unsigned int i
, offs
, counts
;
500 struct snd_urb_ctx
*ctx
= urb
->context
;
501 int stride
= runtime
->frame_bits
>> 3;
504 urb
->dev
= ctx
->subs
->dev
;
505 urb
->number_of_packets
= subs
->packs_per_ms
;
506 for (i
= 0; i
< subs
->packs_per_ms
; ++i
) {
507 counts
= snd_usb_audio_next_packet_size(subs
);
508 urb
->iso_frame_desc
[i
].offset
= offs
* stride
;
509 urb
->iso_frame_desc
[i
].length
= counts
* stride
;
512 urb
->transfer_buffer_length
= offs
* stride
;
513 memset(urb
->transfer_buffer
,
514 subs
->cur_audiofmt
->format
== SNDRV_PCM_FORMAT_U8
? 0x80 : 0,
520 * prepare urb for playback data pipe
522 * Since a URB can handle only a single linear buffer, we must use double
523 * buffering when the data to be transferred overflows the buffer boundary.
524 * To avoid inconsistencies when updating hwptr_done, we use double buffering
527 static int prepare_playback_urb(struct snd_usb_substream
*subs
,
528 struct snd_pcm_runtime
*runtime
,
534 int period_elapsed
= 0;
535 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
537 stride
= runtime
->frame_bits
>> 3;
540 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
541 urb
->number_of_packets
= 0;
542 spin_lock_irqsave(&subs
->lock
, flags
);
543 for (i
= 0; i
< ctx
->packets
; i
++) {
544 counts
= snd_usb_audio_next_packet_size(subs
);
545 /* set up descriptor */
546 urb
->iso_frame_desc
[i
].offset
= offs
* stride
;
547 urb
->iso_frame_desc
[i
].length
= counts
* stride
;
549 urb
->number_of_packets
++;
550 subs
->transfer_done
+= counts
;
551 if (subs
->transfer_done
>= runtime
->period_size
) {
552 subs
->transfer_done
-= runtime
->period_size
;
554 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
) {
555 if (subs
->transfer_done
> 0) {
556 /* FIXME: fill-max mode is not
558 offs
-= subs
->transfer_done
;
559 counts
-= subs
->transfer_done
;
560 urb
->iso_frame_desc
[i
].length
=
562 subs
->transfer_done
= 0;
565 if (i
< ctx
->packets
) {
566 /* add a transfer delimiter */
567 urb
->iso_frame_desc
[i
].offset
=
569 urb
->iso_frame_desc
[i
].length
= 0;
570 urb
->number_of_packets
++;
575 /* finish at the frame boundary at/after the period boundary */
576 if (period_elapsed
&&
577 (i
& (subs
->packs_per_ms
- 1)) == subs
->packs_per_ms
- 1)
580 if (subs
->hwptr_done
+ offs
> runtime
->buffer_size
) {
581 /* err, the transferred area goes over buffer boundary. */
582 unsigned int len
= runtime
->buffer_size
- subs
->hwptr_done
;
583 memcpy(urb
->transfer_buffer
,
584 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
586 memcpy(urb
->transfer_buffer
+ len
* stride
,
588 (offs
- len
) * stride
);
590 memcpy(urb
->transfer_buffer
,
591 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
594 subs
->hwptr_done
+= offs
;
595 if (subs
->hwptr_done
>= runtime
->buffer_size
)
596 subs
->hwptr_done
-= runtime
->buffer_size
;
597 spin_unlock_irqrestore(&subs
->lock
, flags
);
598 urb
->transfer_buffer_length
= offs
* stride
;
600 snd_pcm_period_elapsed(subs
->pcm_substream
);
605 * process after playback data complete
608 static int retire_playback_urb(struct snd_usb_substream
*subs
,
609 struct snd_pcm_runtime
*runtime
,
618 static struct snd_urb_ops audio_urb_ops
[2] = {
620 .prepare
= prepare_startup_playback_urb
,
621 .retire
= retire_playback_urb
,
622 .prepare_sync
= prepare_playback_sync_urb
,
623 .retire_sync
= retire_playback_sync_urb
,
626 .prepare
= prepare_capture_urb
,
627 .retire
= retire_capture_urb
,
628 .prepare_sync
= prepare_capture_sync_urb
,
629 .retire_sync
= retire_capture_sync_urb
,
633 static struct snd_urb_ops audio_urb_ops_high_speed
[2] = {
635 .prepare
= prepare_startup_playback_urb
,
636 .retire
= retire_playback_urb
,
637 .prepare_sync
= prepare_playback_sync_urb_hs
,
638 .retire_sync
= retire_playback_sync_urb_hs
,
641 .prepare
= prepare_capture_urb
,
642 .retire
= retire_capture_urb
,
643 .prepare_sync
= prepare_capture_sync_urb_hs
,
644 .retire_sync
= retire_capture_sync_urb
,
649 * complete callback from data urb
651 static void snd_complete_urb(struct urb
*urb
, struct pt_regs
*regs
)
653 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
654 struct snd_usb_substream
*subs
= ctx
->subs
;
655 struct snd_pcm_substream
*substream
= ctx
->subs
->pcm_substream
;
658 if ((subs
->running
&& subs
->ops
.retire(subs
, substream
->runtime
, urb
)) ||
659 ! subs
->running
|| /* can be stopped during retire callback */
660 (err
= subs
->ops
.prepare(subs
, substream
->runtime
, urb
)) < 0 ||
661 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
662 clear_bit(ctx
->index
, &subs
->active_mask
);
664 snd_printd(KERN_ERR
"cannot submit urb (err = %d)\n", err
);
665 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
672 * complete callback from sync urb
674 static void snd_complete_sync_urb(struct urb
*urb
, struct pt_regs
*regs
)
676 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
677 struct snd_usb_substream
*subs
= ctx
->subs
;
678 struct snd_pcm_substream
*substream
= ctx
->subs
->pcm_substream
;
681 if ((subs
->running
&& subs
->ops
.retire_sync(subs
, substream
->runtime
, urb
)) ||
682 ! subs
->running
|| /* can be stopped during retire callback */
683 (err
= subs
->ops
.prepare_sync(subs
, substream
->runtime
, urb
)) < 0 ||
684 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
685 clear_bit(ctx
->index
+ 16, &subs
->active_mask
);
687 snd_printd(KERN_ERR
"cannot submit sync urb (err = %d)\n", err
);
688 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
694 /* get the physical page pointer at the given offset */
695 static struct page
*snd_pcm_get_vmalloc_page(struct snd_pcm_substream
*subs
,
696 unsigned long offset
)
698 void *pageptr
= subs
->runtime
->dma_area
+ offset
;
699 return vmalloc_to_page(pageptr
);
702 /* allocate virtual buffer; may be called more than once */
703 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream
*subs
, size_t size
)
705 struct snd_pcm_runtime
*runtime
= subs
->runtime
;
706 if (runtime
->dma_area
) {
707 if (runtime
->dma_bytes
>= size
)
708 return 0; /* already large enough */
709 vfree(runtime
->dma_area
);
711 runtime
->dma_area
= vmalloc(size
);
712 if (! runtime
->dma_area
)
714 runtime
->dma_bytes
= size
;
718 /* free virtual buffer; may be called more than once */
719 static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream
*subs
)
721 struct snd_pcm_runtime
*runtime
= subs
->runtime
;
722 if (runtime
->dma_area
) {
723 vfree(runtime
->dma_area
);
724 runtime
->dma_area
= NULL
;
731 * unlink active urbs.
733 static int deactivate_urbs(struct snd_usb_substream
*subs
, int force
, int can_sleep
)
740 if (!force
&& subs
->stream
->chip
->shutdown
) /* to be sure... */
743 async
= !can_sleep
&& async_unlink
;
745 if (! async
&& in_interrupt())
748 for (i
= 0; i
< subs
->nurbs
; i
++) {
749 if (test_bit(i
, &subs
->active_mask
)) {
750 if (! test_and_set_bit(i
, &subs
->unlink_mask
)) {
751 struct urb
*u
= subs
->dataurb
[i
].urb
;
759 if (subs
->syncpipe
) {
760 for (i
= 0; i
< SYNC_URBS
; i
++) {
761 if (test_bit(i
+16, &subs
->active_mask
)) {
762 if (! test_and_set_bit(i
+16, &subs
->unlink_mask
)) {
763 struct urb
*u
= subs
->syncurb
[i
].urb
;
777 * set up and start data/sync urbs
779 static int start_urbs(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
)
784 if (subs
->stream
->chip
->shutdown
)
787 for (i
= 0; i
< subs
->nurbs
; i
++) {
788 snd_assert(subs
->dataurb
[i
].urb
, return -EINVAL
);
789 if (subs
->ops
.prepare(subs
, runtime
, subs
->dataurb
[i
].urb
) < 0) {
790 snd_printk(KERN_ERR
"cannot prepare datapipe for urb %d\n", i
);
794 if (subs
->syncpipe
) {
795 for (i
= 0; i
< SYNC_URBS
; i
++) {
796 snd_assert(subs
->syncurb
[i
].urb
, return -EINVAL
);
797 if (subs
->ops
.prepare_sync(subs
, runtime
, subs
->syncurb
[i
].urb
) < 0) {
798 snd_printk(KERN_ERR
"cannot prepare syncpipe for urb %d\n", i
);
804 subs
->active_mask
= 0;
805 subs
->unlink_mask
= 0;
807 for (i
= 0; i
< subs
->nurbs
; i
++) {
808 if ((err
= usb_submit_urb(subs
->dataurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
809 snd_printk(KERN_ERR
"cannot submit datapipe for urb %d, err = %d\n", i
, err
);
812 set_bit(i
, &subs
->active_mask
);
814 if (subs
->syncpipe
) {
815 for (i
= 0; i
< SYNC_URBS
; i
++) {
816 if ((err
= usb_submit_urb(subs
->syncurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
817 snd_printk(KERN_ERR
"cannot submit syncpipe for urb %d, err = %d\n", i
, err
);
820 set_bit(i
+ 16, &subs
->active_mask
);
826 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
827 deactivate_urbs(subs
, 0, 0);
833 * wait until all urbs are processed.
835 static int wait_clear_urbs(struct snd_usb_substream
*subs
)
837 unsigned long end_time
= jiffies
+ msecs_to_jiffies(1000);
843 for (i
= 0; i
< subs
->nurbs
; i
++) {
844 if (test_bit(i
, &subs
->active_mask
))
847 if (subs
->syncpipe
) {
848 for (i
= 0; i
< SYNC_URBS
; i
++) {
849 if (test_bit(i
+ 16, &subs
->active_mask
))
855 schedule_timeout_uninterruptible(1);
856 } while (time_before(jiffies
, end_time
));
858 snd_printk(KERN_ERR
"timeout: still %d active urbs..\n", alive
);
864 * return the current pcm pointer. just return the hwptr_done value.
866 static snd_pcm_uframes_t
snd_usb_pcm_pointer(struct snd_pcm_substream
*substream
)
868 struct snd_usb_substream
*subs
;
869 snd_pcm_uframes_t hwptr_done
;
871 subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
872 spin_lock(&subs
->lock
);
873 hwptr_done
= subs
->hwptr_done
;
874 spin_unlock(&subs
->lock
);
880 * start/stop playback substream
882 static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream
*substream
,
885 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
888 case SNDRV_PCM_TRIGGER_START
:
889 subs
->ops
.prepare
= prepare_playback_urb
;
891 case SNDRV_PCM_TRIGGER_STOP
:
892 return deactivate_urbs(subs
, 0, 0);
899 * start/stop capture substream
901 static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream
*substream
,
904 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
907 case SNDRV_PCM_TRIGGER_START
:
908 return start_urbs(subs
, substream
->runtime
);
909 case SNDRV_PCM_TRIGGER_STOP
:
910 return deactivate_urbs(subs
, 0, 0);
920 static void release_urb_ctx(struct snd_urb_ctx
*u
)
924 usb_buffer_free(u
->subs
->dev
, u
->buffer_size
,
925 u
->urb
->transfer_buffer
,
926 u
->urb
->transfer_dma
);
927 usb_free_urb(u
->urb
);
933 * release a substream
935 static void release_substream_urbs(struct snd_usb_substream
*subs
, int force
)
939 /* stop urbs (to be sure) */
940 deactivate_urbs(subs
, force
, 1);
941 wait_clear_urbs(subs
);
943 for (i
= 0; i
< MAX_URBS
; i
++)
944 release_urb_ctx(&subs
->dataurb
[i
]);
945 for (i
= 0; i
< SYNC_URBS
; i
++)
946 release_urb_ctx(&subs
->syncurb
[i
]);
947 usb_buffer_free(subs
->dev
, SYNC_URBS
* 4,
948 subs
->syncbuf
, subs
->sync_dma
);
949 subs
->syncbuf
= NULL
;
954 * initialize a substream for plaback/capture
956 static int init_substream_urbs(struct snd_usb_substream
*subs
, unsigned int period_bytes
,
957 unsigned int rate
, unsigned int frame_bits
)
959 unsigned int maxsize
, n
, i
;
960 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
961 unsigned int npacks
[MAX_URBS
], urb_packs
, total_packs
, packs_per_ms
;
963 /* calculate the frequency in 16.16 format */
964 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
965 subs
->freqn
= get_usb_full_speed_rate(rate
);
967 subs
->freqn
= get_usb_high_speed_rate(rate
);
968 subs
->freqm
= subs
->freqn
;
969 /* calculate max. frequency */
970 if (subs
->maxpacksize
) {
971 /* whatever fits into a max. size packet */
972 maxsize
= subs
->maxpacksize
;
973 subs
->freqmax
= (maxsize
/ (frame_bits
>> 3))
974 << (16 - subs
->datainterval
);
976 /* no max. packet size: just take 25% higher than nominal */
977 subs
->freqmax
= subs
->freqn
+ (subs
->freqn
>> 2);
978 maxsize
= ((subs
->freqmax
+ 0xffff) * (frame_bits
>> 3))
979 >> (16 - subs
->datainterval
);
984 subs
->curpacksize
= subs
->maxpacksize
;
986 subs
->curpacksize
= maxsize
;
988 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
)
989 packs_per_ms
= 8 >> subs
->datainterval
;
992 subs
->packs_per_ms
= packs_per_ms
;
996 urb_packs
= max(urb_packs
, (unsigned int)MIN_PACKS_URB
);
997 urb_packs
= min(urb_packs
, (unsigned int)MAX_PACKS
);
1000 urb_packs
*= packs_per_ms
;
1002 /* decide how many packets to be used */
1004 unsigned int minsize
;
1005 /* determine how small a packet can be */
1006 minsize
= (subs
->freqn
>> (16 - subs
->datainterval
))
1007 * (frame_bits
>> 3);
1008 /* with sync from device, assume it can be 12% lower */
1010 minsize
-= minsize
>> 3;
1011 minsize
= max(minsize
, 1u);
1012 total_packs
= (period_bytes
+ minsize
- 1) / minsize
;
1013 /* round up to multiple of packs_per_ms */
1014 total_packs
= (total_packs
+ packs_per_ms
- 1)
1015 & ~(packs_per_ms
- 1);
1016 /* we need at least two URBs for queueing */
1017 if (total_packs
< 2 * MIN_PACKS_URB
* packs_per_ms
)
1018 total_packs
= 2 * MIN_PACKS_URB
* packs_per_ms
;
1020 total_packs
= MAX_URBS
* urb_packs
;
1022 subs
->nurbs
= (total_packs
+ urb_packs
- 1) / urb_packs
;
1023 if (subs
->nurbs
> MAX_URBS
) {
1025 subs
->nurbs
= MAX_URBS
;
1026 total_packs
= MAX_URBS
* urb_packs
;
1029 for (i
= 0; i
< subs
->nurbs
; i
++) {
1030 npacks
[i
] = n
> urb_packs
? urb_packs
: n
;
1033 if (subs
->nurbs
<= 1) {
1034 /* too little - we need at least two packets
1035 * to ensure contiguous playback/capture
1038 npacks
[0] = (total_packs
+ 1) / 2;
1039 npacks
[1] = total_packs
- npacks
[0];
1040 } else if (npacks
[subs
->nurbs
-1] < MIN_PACKS_URB
* packs_per_ms
) {
1041 /* the last packet is too small.. */
1042 if (subs
->nurbs
> 2) {
1043 /* merge to the first one */
1044 npacks
[0] += npacks
[subs
->nurbs
- 1];
1049 npacks
[0] = (total_packs
+ 1) / 2;
1050 npacks
[1] = total_packs
- npacks
[0];
1054 /* allocate and initialize data urbs */
1055 for (i
= 0; i
< subs
->nurbs
; i
++) {
1056 struct snd_urb_ctx
*u
= &subs
->dataurb
[i
];
1059 u
->packets
= npacks
[i
];
1060 u
->buffer_size
= maxsize
* u
->packets
;
1061 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
)
1062 u
->packets
++; /* for transfer delimiter */
1063 u
->urb
= usb_alloc_urb(u
->packets
, GFP_KERNEL
);
1066 u
->urb
->transfer_buffer
=
1067 usb_buffer_alloc(subs
->dev
, u
->buffer_size
, GFP_KERNEL
,
1068 &u
->urb
->transfer_dma
);
1069 if (! u
->urb
->transfer_buffer
)
1071 u
->urb
->pipe
= subs
->datapipe
;
1072 u
->urb
->transfer_flags
= URB_ISO_ASAP
| URB_NO_TRANSFER_DMA_MAP
;
1073 u
->urb
->interval
= 1 << subs
->datainterval
;
1074 u
->urb
->context
= u
;
1075 u
->urb
->complete
= snd_complete_urb
;
1078 if (subs
->syncpipe
) {
1079 /* allocate and initialize sync urbs */
1080 subs
->syncbuf
= usb_buffer_alloc(subs
->dev
, SYNC_URBS
* 4,
1081 GFP_KERNEL
, &subs
->sync_dma
);
1082 if (! subs
->syncbuf
)
1084 for (i
= 0; i
< SYNC_URBS
; i
++) {
1085 struct snd_urb_ctx
*u
= &subs
->syncurb
[i
];
1089 u
->urb
= usb_alloc_urb(1, GFP_KERNEL
);
1092 u
->urb
->transfer_buffer
= subs
->syncbuf
+ i
* 4;
1093 u
->urb
->transfer_dma
= subs
->sync_dma
+ i
* 4;
1094 u
->urb
->transfer_buffer_length
= 4;
1095 u
->urb
->pipe
= subs
->syncpipe
;
1096 u
->urb
->transfer_flags
= URB_ISO_ASAP
|
1097 URB_NO_TRANSFER_DMA_MAP
;
1098 u
->urb
->number_of_packets
= 1;
1099 u
->urb
->interval
= 1 << subs
->syncinterval
;
1100 u
->urb
->context
= u
;
1101 u
->urb
->complete
= snd_complete_sync_urb
;
1107 release_substream_urbs(subs
, 0);
1113 * find a matching audio format
1115 static struct audioformat
*find_format(struct snd_usb_substream
*subs
, unsigned int format
,
1116 unsigned int rate
, unsigned int channels
)
1118 struct list_head
*p
;
1119 struct audioformat
*found
= NULL
;
1120 int cur_attr
= 0, attr
;
1122 list_for_each(p
, &subs
->fmt_list
) {
1123 struct audioformat
*fp
;
1124 fp
= list_entry(p
, struct audioformat
, list
);
1125 if (fp
->format
!= format
|| fp
->channels
!= channels
)
1127 if (rate
< fp
->rate_min
|| rate
> fp
->rate_max
)
1129 if (! (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)) {
1131 for (i
= 0; i
< fp
->nr_rates
; i
++)
1132 if (fp
->rate_table
[i
] == rate
)
1134 if (i
>= fp
->nr_rates
)
1137 attr
= fp
->ep_attr
& EP_ATTR_MASK
;
1143 /* avoid async out and adaptive in if the other method
1144 * supports the same format.
1145 * this is a workaround for the case like
1146 * M-audio audiophile USB.
1148 if (attr
!= cur_attr
) {
1149 if ((attr
== EP_ATTR_ASYNC
&&
1150 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1151 (attr
== EP_ATTR_ADAPTIVE
&&
1152 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
))
1154 if ((cur_attr
== EP_ATTR_ASYNC
&&
1155 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1156 (cur_attr
== EP_ATTR_ADAPTIVE
&&
1157 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
)) {
1163 /* find the format with the largest max. packet size */
1164 if (fp
->maxpacksize
> found
->maxpacksize
) {
1174 * initialize the picth control and sample rate
1176 static int init_usb_pitch(struct usb_device
*dev
, int iface
,
1177 struct usb_host_interface
*alts
,
1178 struct audioformat
*fmt
)
1181 unsigned char data
[1];
1184 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1185 /* if endpoint has pitch control, enable it */
1186 if (fmt
->attributes
& EP_CS_ATTR_PITCH_CONTROL
) {
1188 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1189 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1190 PITCH_CONTROL
<< 8, ep
, data
, 1, 1000)) < 0) {
1191 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH\n",
1192 dev
->devnum
, iface
, ep
);
1199 static int init_usb_sample_rate(struct usb_device
*dev
, int iface
,
1200 struct usb_host_interface
*alts
,
1201 struct audioformat
*fmt
, int rate
)
1204 unsigned char data
[3];
1207 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1208 /* if endpoint has sampling rate control, set it */
1209 if (fmt
->attributes
& EP_CS_ATTR_SAMPLE_RATE
) {
1212 data
[1] = rate
>> 8;
1213 data
[2] = rate
>> 16;
1214 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1215 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1216 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1217 snd_printk(KERN_ERR
"%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1218 dev
->devnum
, iface
, fmt
->altsetting
, rate
, ep
);
1221 if ((err
= snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), GET_CUR
,
1222 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_IN
,
1223 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1224 snd_printk(KERN_WARNING
"%d:%d:%d: cannot get freq at ep 0x%x\n",
1225 dev
->devnum
, iface
, fmt
->altsetting
, ep
);
1226 return 0; /* some devices don't support reading */
1228 crate
= data
[0] | (data
[1] << 8) | (data
[2] << 16);
1229 if (crate
!= rate
) {
1230 snd_printd(KERN_WARNING
"current rate %d is different from the runtime rate %d\n", crate
, rate
);
1231 // runtime->rate = crate;
1238 * find a matching format and set up the interface
1240 static int set_format(struct snd_usb_substream
*subs
, struct audioformat
*fmt
)
1242 struct usb_device
*dev
= subs
->dev
;
1243 struct usb_host_interface
*alts
;
1244 struct usb_interface_descriptor
*altsd
;
1245 struct usb_interface
*iface
;
1246 unsigned int ep
, attr
;
1247 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
1250 iface
= usb_ifnum_to_if(dev
, fmt
->iface
);
1251 snd_assert(iface
, return -EINVAL
);
1252 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1253 altsd
= get_iface_desc(alts
);
1254 snd_assert(altsd
->bAlternateSetting
== fmt
->altsetting
, return -EINVAL
);
1256 if (fmt
== subs
->cur_audiofmt
)
1259 /* close the old interface */
1260 if (subs
->interface
>= 0 && subs
->interface
!= fmt
->iface
) {
1261 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1262 subs
->interface
= -1;
1267 if (subs
->interface
!= fmt
->iface
|| subs
->format
!= fmt
->altset_idx
) {
1268 if (usb_set_interface(dev
, fmt
->iface
, fmt
->altsetting
) < 0) {
1269 snd_printk(KERN_ERR
"%d:%d:%d: usb_set_interface failed\n",
1270 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1273 snd_printdd(KERN_INFO
"setting usb interface %d:%d\n", fmt
->iface
, fmt
->altsetting
);
1274 subs
->interface
= fmt
->iface
;
1275 subs
->format
= fmt
->altset_idx
;
1278 /* create a data pipe */
1279 ep
= fmt
->endpoint
& USB_ENDPOINT_NUMBER_MASK
;
1281 subs
->datapipe
= usb_sndisocpipe(dev
, ep
);
1283 subs
->datapipe
= usb_rcvisocpipe(dev
, ep
);
1284 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
&&
1285 get_endpoint(alts
, 0)->bInterval
>= 1 &&
1286 get_endpoint(alts
, 0)->bInterval
<= 4)
1287 subs
->datainterval
= get_endpoint(alts
, 0)->bInterval
- 1;
1289 subs
->datainterval
= 0;
1290 subs
->syncpipe
= subs
->syncinterval
= 0;
1291 subs
->maxpacksize
= fmt
->maxpacksize
;
1294 /* we need a sync pipe in async OUT or adaptive IN mode */
1295 /* check the number of EP, since some devices have broken
1296 * descriptors which fool us. if it has only one EP,
1297 * assume it as adaptive-out or sync-in.
1299 attr
= fmt
->ep_attr
& EP_ATTR_MASK
;
1300 if (((is_playback
&& attr
== EP_ATTR_ASYNC
) ||
1301 (! is_playback
&& attr
== EP_ATTR_ADAPTIVE
)) &&
1302 altsd
->bNumEndpoints
>= 2) {
1303 /* check sync-pipe endpoint */
1304 /* ... and check descriptor size before accessing bSynchAddress
1305 because there is a version of the SB Audigy 2 NX firmware lacking
1306 the audio fields in the endpoint descriptors */
1307 if ((get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) != 0x01 ||
1308 (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1309 get_endpoint(alts
, 1)->bSynchAddress
!= 0)) {
1310 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1311 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1314 ep
= get_endpoint(alts
, 1)->bEndpointAddress
;
1315 if (get_endpoint(alts
, 0)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1316 (( is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
| USB_DIR_IN
)) ||
1317 (!is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
& ~USB_DIR_IN
)))) {
1318 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1319 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1322 ep
&= USB_ENDPOINT_NUMBER_MASK
;
1324 subs
->syncpipe
= usb_rcvisocpipe(dev
, ep
);
1326 subs
->syncpipe
= usb_sndisocpipe(dev
, ep
);
1327 if (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1328 get_endpoint(alts
, 1)->bRefresh
>= 1 &&
1329 get_endpoint(alts
, 1)->bRefresh
<= 9)
1330 subs
->syncinterval
= get_endpoint(alts
, 1)->bRefresh
;
1331 else if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
1332 subs
->syncinterval
= 1;
1333 else if (get_endpoint(alts
, 1)->bInterval
>= 1 &&
1334 get_endpoint(alts
, 1)->bInterval
<= 16)
1335 subs
->syncinterval
= get_endpoint(alts
, 1)->bInterval
- 1;
1337 subs
->syncinterval
= 3;
1340 /* always fill max packet size */
1341 if (fmt
->attributes
& EP_CS_ATTR_FILL_MAX
)
1344 if ((err
= init_usb_pitch(dev
, subs
->interface
, alts
, fmt
)) < 0)
1347 subs
->cur_audiofmt
= fmt
;
1350 printk("setting done: format = %d, rate = %d, channels = %d\n",
1351 fmt
->format
, fmt
->rate
, fmt
->channels
);
1352 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1353 subs
->datapipe
, subs
->syncpipe
);
1360 * hw_params callback
1362 * allocate a buffer and set the given audio format.
1364 * so far we use a physically linear buffer although packetize transfer
1365 * doesn't need a continuous area.
1366 * if sg buffer is supported on the later version of alsa, we'll follow
1369 static int snd_usb_hw_params(struct snd_pcm_substream
*substream
,
1370 struct snd_pcm_hw_params
*hw_params
)
1372 struct snd_usb_substream
*subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
1373 struct audioformat
*fmt
;
1374 unsigned int channels
, rate
, format
;
1377 ret
= snd_pcm_alloc_vmalloc_buffer(substream
,
1378 params_buffer_bytes(hw_params
));
1382 format
= params_format(hw_params
);
1383 rate
= params_rate(hw_params
);
1384 channels
= params_channels(hw_params
);
1385 fmt
= find_format(subs
, format
, rate
, channels
);
1387 snd_printd(KERN_DEBUG
"cannot set format: format = %s, rate = %d, channels = %d\n",
1388 snd_pcm_format_name(format
), rate
, channels
);
1392 changed
= subs
->cur_audiofmt
!= fmt
||
1393 subs
->period_bytes
!= params_period_bytes(hw_params
) ||
1394 subs
->cur_rate
!= rate
;
1395 if ((ret
= set_format(subs
, fmt
)) < 0)
1398 if (subs
->cur_rate
!= rate
) {
1399 struct usb_host_interface
*alts
;
1400 struct usb_interface
*iface
;
1401 iface
= usb_ifnum_to_if(subs
->dev
, fmt
->iface
);
1402 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1403 ret
= init_usb_sample_rate(subs
->dev
, subs
->interface
, alts
, fmt
, rate
);
1406 subs
->cur_rate
= rate
;
1410 /* format changed */
1411 release_substream_urbs(subs
, 0);
1412 /* influenced: period_bytes, channels, rate, format, */
1413 ret
= init_substream_urbs(subs
, params_period_bytes(hw_params
),
1414 params_rate(hw_params
),
1415 snd_pcm_format_physical_width(params_format(hw_params
)) * params_channels(hw_params
));
1424 * reset the audio format and release the buffer
1426 static int snd_usb_hw_free(struct snd_pcm_substream
*substream
)
1428 struct snd_usb_substream
*subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
1430 subs
->cur_audiofmt
= NULL
;
1432 subs
->period_bytes
= 0;
1433 release_substream_urbs(subs
, 0);
1434 return snd_pcm_free_vmalloc_buffer(substream
);
1440 * only a few subtle things...
1442 static int snd_usb_pcm_prepare(struct snd_pcm_substream
*substream
)
1444 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1445 struct snd_usb_substream
*subs
= runtime
->private_data
;
1447 if (! subs
->cur_audiofmt
) {
1448 snd_printk(KERN_ERR
"usbaudio: no format is specified!\n");
1452 /* some unit conversions in runtime */
1453 subs
->maxframesize
= bytes_to_frames(runtime
, subs
->maxpacksize
);
1454 subs
->curframesize
= bytes_to_frames(runtime
, subs
->curpacksize
);
1456 /* reset the pointer */
1457 subs
->hwptr_done
= 0;
1458 subs
->transfer_done
= 0;
1461 /* clear urbs (to be sure) */
1462 deactivate_urbs(subs
, 0, 1);
1463 wait_clear_urbs(subs
);
1465 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1466 * updates for all URBs would happen at the same time when starting */
1467 if (subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) {
1468 subs
->ops
.prepare
= prepare_startup_playback_urb
;
1469 return start_urbs(subs
, runtime
);
1474 static struct snd_pcm_hardware snd_usb_playback
=
1476 .info
= SNDRV_PCM_INFO_MMAP
|
1477 SNDRV_PCM_INFO_MMAP_VALID
|
1478 SNDRV_PCM_INFO_BATCH
|
1479 SNDRV_PCM_INFO_INTERLEAVED
|
1480 SNDRV_PCM_INFO_BLOCK_TRANSFER
,
1481 .buffer_bytes_max
= 1024 * 1024,
1482 .period_bytes_min
= 64,
1483 .period_bytes_max
= 512 * 1024,
1485 .periods_max
= 1024,
1488 static struct snd_pcm_hardware snd_usb_capture
=
1490 .info
= SNDRV_PCM_INFO_MMAP
|
1491 SNDRV_PCM_INFO_MMAP_VALID
|
1492 SNDRV_PCM_INFO_BATCH
|
1493 SNDRV_PCM_INFO_INTERLEAVED
|
1494 SNDRV_PCM_INFO_BLOCK_TRANSFER
,
1495 .buffer_bytes_max
= 1024 * 1024,
1496 .period_bytes_min
= 64,
1497 .period_bytes_max
= 512 * 1024,
1499 .periods_max
= 1024,
1506 #ifdef HW_CONST_DEBUG
1507 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1509 #define hwc_debug(fmt, args...) /**/
1512 static int hw_check_valid_format(struct snd_pcm_hw_params
*params
, struct audioformat
*fp
)
1514 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1515 struct snd_interval
*ct
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1516 struct snd_mask
*fmts
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1518 /* check the format */
1519 if (! snd_mask_test(fmts
, fp
->format
)) {
1520 hwc_debug(" > check: no supported format %d\n", fp
->format
);
1523 /* check the channels */
1524 if (fp
->channels
< ct
->min
|| fp
->channels
> ct
->max
) {
1525 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp
->channels
, ct
->min
, ct
->max
);
1528 /* check the rate is within the range */
1529 if (fp
->rate_min
> it
->max
|| (fp
->rate_min
== it
->max
&& it
->openmax
)) {
1530 hwc_debug(" > check: rate_min %d > max %d\n", fp
->rate_min
, it
->max
);
1533 if (fp
->rate_max
< it
->min
|| (fp
->rate_max
== it
->min
&& it
->openmin
)) {
1534 hwc_debug(" > check: rate_max %d < min %d\n", fp
->rate_max
, it
->min
);
1540 static int hw_rule_rate(struct snd_pcm_hw_params
*params
,
1541 struct snd_pcm_hw_rule
*rule
)
1543 struct snd_usb_substream
*subs
= rule
->private;
1544 struct list_head
*p
;
1545 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1546 unsigned int rmin
, rmax
;
1549 hwc_debug("hw_rule_rate: (%d,%d)\n", it
->min
, it
->max
);
1552 list_for_each(p
, &subs
->fmt_list
) {
1553 struct audioformat
*fp
;
1554 fp
= list_entry(p
, struct audioformat
, list
);
1555 if (! hw_check_valid_format(params
, fp
))
1558 if (rmin
> fp
->rate_min
)
1559 rmin
= fp
->rate_min
;
1560 if (rmax
< fp
->rate_max
)
1561 rmax
= fp
->rate_max
;
1563 rmin
= fp
->rate_min
;
1564 rmax
= fp
->rate_max
;
1569 hwc_debug(" --> get empty\n");
1575 if (it
->min
< rmin
) {
1580 if (it
->max
> rmax
) {
1585 if (snd_interval_checkempty(it
)) {
1589 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1594 static int hw_rule_channels(struct snd_pcm_hw_params
*params
,
1595 struct snd_pcm_hw_rule
*rule
)
1597 struct snd_usb_substream
*subs
= rule
->private;
1598 struct list_head
*p
;
1599 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1600 unsigned int rmin
, rmax
;
1603 hwc_debug("hw_rule_channels: (%d,%d)\n", it
->min
, it
->max
);
1606 list_for_each(p
, &subs
->fmt_list
) {
1607 struct audioformat
*fp
;
1608 fp
= list_entry(p
, struct audioformat
, list
);
1609 if (! hw_check_valid_format(params
, fp
))
1612 if (rmin
> fp
->channels
)
1613 rmin
= fp
->channels
;
1614 if (rmax
< fp
->channels
)
1615 rmax
= fp
->channels
;
1617 rmin
= fp
->channels
;
1618 rmax
= fp
->channels
;
1623 hwc_debug(" --> get empty\n");
1629 if (it
->min
< rmin
) {
1634 if (it
->max
> rmax
) {
1639 if (snd_interval_checkempty(it
)) {
1643 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1647 static int hw_rule_format(struct snd_pcm_hw_params
*params
,
1648 struct snd_pcm_hw_rule
*rule
)
1650 struct snd_usb_substream
*subs
= rule
->private;
1651 struct list_head
*p
;
1652 struct snd_mask
*fmt
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1657 hwc_debug("hw_rule_format: %x:%x\n", fmt
->bits
[0], fmt
->bits
[1]);
1659 list_for_each(p
, &subs
->fmt_list
) {
1660 struct audioformat
*fp
;
1661 fp
= list_entry(p
, struct audioformat
, list
);
1662 if (! hw_check_valid_format(params
, fp
))
1664 fbits
|= (1ULL << fp
->format
);
1667 oldbits
[0] = fmt
->bits
[0];
1668 oldbits
[1] = fmt
->bits
[1];
1669 fmt
->bits
[0] &= (u32
)fbits
;
1670 fmt
->bits
[1] &= (u32
)(fbits
>> 32);
1671 if (! fmt
->bits
[0] && ! fmt
->bits
[1]) {
1672 hwc_debug(" --> get empty\n");
1675 changed
= (oldbits
[0] != fmt
->bits
[0] || oldbits
[1] != fmt
->bits
[1]);
1676 hwc_debug(" --> %x:%x (changed = %d)\n", fmt
->bits
[0], fmt
->bits
[1], changed
);
1683 * check whether the registered audio formats need special hw-constraints
1685 static int check_hw_params_convention(struct snd_usb_substream
*subs
)
1690 u32 cmaster
, rmaster
;
1691 u32 rate_min
= 0, rate_max
= 0;
1692 struct list_head
*p
;
1695 channels
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1696 rates
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1698 list_for_each(p
, &subs
->fmt_list
) {
1699 struct audioformat
*f
;
1700 f
= list_entry(p
, struct audioformat
, list
);
1701 /* unconventional channels? */
1702 if (f
->channels
> 32)
1704 /* continuous rate min/max matches? */
1705 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1706 if (rate_min
&& f
->rate_min
!= rate_min
)
1708 if (rate_max
&& f
->rate_max
!= rate_max
)
1710 rate_min
= f
->rate_min
;
1711 rate_max
= f
->rate_max
;
1713 /* combination of continuous rates and fixed rates? */
1714 if (rates
[f
->format
] & SNDRV_PCM_RATE_CONTINUOUS
) {
1715 if (f
->rates
!= rates
[f
->format
])
1718 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1719 if (rates
[f
->format
] && rates
[f
->format
] != f
->rates
)
1722 channels
[f
->format
] |= (1 << f
->channels
);
1723 rates
[f
->format
] |= f
->rates
;
1725 /* check whether channels and rates match for all formats */
1726 cmaster
= rmaster
= 0;
1727 for (i
= 0; i
< MAX_MASK
; i
++) {
1728 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1730 if (rmaster
!= rates
[i
] && rmaster
&& rates
[i
])
1733 cmaster
= channels
[i
];
1737 /* check whether channels match for all distinct rates */
1738 memset(channels
, 0, MAX_MASK
* sizeof(u32
));
1739 list_for_each(p
, &subs
->fmt_list
) {
1740 struct audioformat
*f
;
1741 f
= list_entry(p
, struct audioformat
, list
);
1742 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)
1744 for (i
= 0; i
< 32; i
++) {
1745 if (f
->rates
& (1 << i
))
1746 channels
[i
] |= (1 << f
->channels
);
1750 for (i
= 0; i
< 32; i
++) {
1751 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1754 cmaster
= channels
[i
];
1766 * set up the runtime hardware information.
1769 static int setup_hw_info(struct snd_pcm_runtime
*runtime
, struct snd_usb_substream
*subs
)
1771 struct list_head
*p
;
1774 runtime
->hw
.formats
= subs
->formats
;
1776 runtime
->hw
.rate_min
= 0x7fffffff;
1777 runtime
->hw
.rate_max
= 0;
1778 runtime
->hw
.channels_min
= 256;
1779 runtime
->hw
.channels_max
= 0;
1780 runtime
->hw
.rates
= 0;
1781 /* check min/max rates and channels */
1782 list_for_each(p
, &subs
->fmt_list
) {
1783 struct audioformat
*fp
;
1784 fp
= list_entry(p
, struct audioformat
, list
);
1785 runtime
->hw
.rates
|= fp
->rates
;
1786 if (runtime
->hw
.rate_min
> fp
->rate_min
)
1787 runtime
->hw
.rate_min
= fp
->rate_min
;
1788 if (runtime
->hw
.rate_max
< fp
->rate_max
)
1789 runtime
->hw
.rate_max
= fp
->rate_max
;
1790 if (runtime
->hw
.channels_min
> fp
->channels
)
1791 runtime
->hw
.channels_min
= fp
->channels
;
1792 if (runtime
->hw
.channels_max
< fp
->channels
)
1793 runtime
->hw
.channels_max
= fp
->channels
;
1794 if (fp
->fmt_type
== USB_FORMAT_TYPE_II
&& fp
->frame_size
> 0) {
1795 /* FIXME: there might be more than one audio formats... */
1796 runtime
->hw
.period_bytes_min
= runtime
->hw
.period_bytes_max
=
1801 /* set the period time minimum 1ms */
1802 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1803 1000 * MIN_PACKS_URB
,
1804 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX
);
1806 if (check_hw_params_convention(subs
)) {
1807 hwc_debug("setting extra hw constraints...\n");
1808 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1810 SNDRV_PCM_HW_PARAM_FORMAT
,
1811 SNDRV_PCM_HW_PARAM_CHANNELS
,
1814 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1815 hw_rule_channels
, subs
,
1816 SNDRV_PCM_HW_PARAM_FORMAT
,
1817 SNDRV_PCM_HW_PARAM_RATE
,
1820 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1821 hw_rule_format
, subs
,
1822 SNDRV_PCM_HW_PARAM_RATE
,
1823 SNDRV_PCM_HW_PARAM_CHANNELS
,
1830 static int snd_usb_pcm_open(struct snd_pcm_substream
*substream
, int direction
,
1831 struct snd_pcm_hardware
*hw
)
1833 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
1834 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1835 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
1837 subs
->interface
= -1;
1840 runtime
->private_data
= subs
;
1841 subs
->pcm_substream
= substream
;
1842 return setup_hw_info(runtime
, subs
);
1845 static int snd_usb_pcm_close(struct snd_pcm_substream
*substream
, int direction
)
1847 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
1848 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
1850 if (subs
->interface
>= 0) {
1851 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1852 subs
->interface
= -1;
1854 subs
->pcm_substream
= NULL
;
1858 static int snd_usb_playback_open(struct snd_pcm_substream
*substream
)
1860 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_PLAYBACK
, &snd_usb_playback
);
1863 static int snd_usb_playback_close(struct snd_pcm_substream
*substream
)
1865 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
1868 static int snd_usb_capture_open(struct snd_pcm_substream
*substream
)
1870 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_CAPTURE
, &snd_usb_capture
);
1873 static int snd_usb_capture_close(struct snd_pcm_substream
*substream
)
1875 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_CAPTURE
);
1878 static struct snd_pcm_ops snd_usb_playback_ops
= {
1879 .open
= snd_usb_playback_open
,
1880 .close
= snd_usb_playback_close
,
1881 .ioctl
= snd_pcm_lib_ioctl
,
1882 .hw_params
= snd_usb_hw_params
,
1883 .hw_free
= snd_usb_hw_free
,
1884 .prepare
= snd_usb_pcm_prepare
,
1885 .trigger
= snd_usb_pcm_playback_trigger
,
1886 .pointer
= snd_usb_pcm_pointer
,
1887 .page
= snd_pcm_get_vmalloc_page
,
1890 static struct snd_pcm_ops snd_usb_capture_ops
= {
1891 .open
= snd_usb_capture_open
,
1892 .close
= snd_usb_capture_close
,
1893 .ioctl
= snd_pcm_lib_ioctl
,
1894 .hw_params
= snd_usb_hw_params
,
1895 .hw_free
= snd_usb_hw_free
,
1896 .prepare
= snd_usb_pcm_prepare
,
1897 .trigger
= snd_usb_pcm_capture_trigger
,
1898 .pointer
= snd_usb_pcm_pointer
,
1899 .page
= snd_pcm_get_vmalloc_page
,
1909 * combine bytes and get an integer value
1911 unsigned int snd_usb_combine_bytes(unsigned char *bytes
, int size
)
1914 case 1: return *bytes
;
1915 case 2: return combine_word(bytes
);
1916 case 3: return combine_triple(bytes
);
1917 case 4: return combine_quad(bytes
);
1923 * parse descriptor buffer and return the pointer starting the given
1926 void *snd_usb_find_desc(void *descstart
, int desclen
, void *after
, u8 dtype
)
1938 if (p
[1] == dtype
&& (!after
|| (void *)p
> after
)) {
1947 * find a class-specified interface descriptor with the given subtype.
1949 void *snd_usb_find_csint_desc(void *buffer
, int buflen
, void *after
, u8 dsubtype
)
1951 unsigned char *p
= after
;
1953 while ((p
= snd_usb_find_desc(buffer
, buflen
, p
,
1954 USB_DT_CS_INTERFACE
)) != NULL
) {
1955 if (p
[0] >= 3 && p
[2] == dsubtype
)
1962 * Wrapper for usb_control_msg().
1963 * Allocates a temp buffer to prevent dmaing from/to the stack.
1965 int snd_usb_ctl_msg(struct usb_device
*dev
, unsigned int pipe
, __u8 request
,
1966 __u8 requesttype
, __u16 value
, __u16 index
, void *data
,
1967 __u16 size
, int timeout
)
1973 buf
= kmalloc(size
, GFP_KERNEL
);
1976 memcpy(buf
, data
, size
);
1978 err
= usb_control_msg(dev
, pipe
, request
, requesttype
,
1979 value
, index
, buf
, size
, timeout
);
1981 memcpy(data
, buf
, size
);
1989 * entry point for linux usb interface
1992 static int usb_audio_probe(struct usb_interface
*intf
,
1993 const struct usb_device_id
*id
);
1994 static void usb_audio_disconnect(struct usb_interface
*intf
);
1996 static struct usb_device_id usb_audio_ids
[] = {
1997 #include "usbquirks.h"
1998 { .match_flags
= (USB_DEVICE_ID_MATCH_INT_CLASS
| USB_DEVICE_ID_MATCH_INT_SUBCLASS
),
1999 .bInterfaceClass
= USB_CLASS_AUDIO
,
2000 .bInterfaceSubClass
= USB_SUBCLASS_AUDIO_CONTROL
},
2001 { } /* Terminating entry */
2004 MODULE_DEVICE_TABLE (usb
, usb_audio_ids
);
2006 static struct usb_driver usb_audio_driver
= {
2007 .name
= "snd-usb-audio",
2008 .probe
= usb_audio_probe
,
2009 .disconnect
= usb_audio_disconnect
,
2010 .id_table
= usb_audio_ids
,
2015 * proc interface for list the supported pcm formats
2017 static void proc_dump_substream_formats(struct snd_usb_substream
*subs
, struct snd_info_buffer
*buffer
)
2019 struct list_head
*p
;
2020 static char *sync_types
[4] = {
2021 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2024 list_for_each(p
, &subs
->fmt_list
) {
2025 struct audioformat
*fp
;
2026 fp
= list_entry(p
, struct audioformat
, list
);
2027 snd_iprintf(buffer
, " Interface %d\n", fp
->iface
);
2028 snd_iprintf(buffer
, " Altset %d\n", fp
->altsetting
);
2029 snd_iprintf(buffer
, " Format: %s\n", snd_pcm_format_name(fp
->format
));
2030 snd_iprintf(buffer
, " Channels: %d\n", fp
->channels
);
2031 snd_iprintf(buffer
, " Endpoint: %d %s (%s)\n",
2032 fp
->endpoint
& USB_ENDPOINT_NUMBER_MASK
,
2033 fp
->endpoint
& USB_DIR_IN
? "IN" : "OUT",
2034 sync_types
[(fp
->ep_attr
& EP_ATTR_MASK
) >> 2]);
2035 if (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
2036 snd_iprintf(buffer
, " Rates: %d - %d (continuous)\n",
2037 fp
->rate_min
, fp
->rate_max
);
2040 snd_iprintf(buffer
, " Rates: ");
2041 for (i
= 0; i
< fp
->nr_rates
; i
++) {
2043 snd_iprintf(buffer
, ", ");
2044 snd_iprintf(buffer
, "%d", fp
->rate_table
[i
]);
2046 snd_iprintf(buffer
, "\n");
2048 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2049 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2053 static void proc_dump_substream_status(struct snd_usb_substream
*subs
, struct snd_info_buffer
*buffer
)
2055 if (subs
->running
) {
2057 snd_iprintf(buffer
, " Status: Running\n");
2058 snd_iprintf(buffer
, " Interface = %d\n", subs
->interface
);
2059 snd_iprintf(buffer
, " Altset = %d\n", subs
->format
);
2060 snd_iprintf(buffer
, " URBs = %d [ ", subs
->nurbs
);
2061 for (i
= 0; i
< subs
->nurbs
; i
++)
2062 snd_iprintf(buffer
, "%d ", subs
->dataurb
[i
].packets
);
2063 snd_iprintf(buffer
, "]\n");
2064 snd_iprintf(buffer
, " Packet Size = %d\n", subs
->curpacksize
);
2065 snd_iprintf(buffer
, " Momentary freq = %u Hz (%#x.%04x)\n",
2066 snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
2067 ? get_full_speed_hz(subs
->freqm
)
2068 : get_high_speed_hz(subs
->freqm
),
2069 subs
->freqm
>> 16, subs
->freqm
& 0xffff);
2071 snd_iprintf(buffer
, " Status: Stop\n");
2075 static void proc_pcm_format_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
2077 struct snd_usb_stream
*stream
= entry
->private_data
;
2079 snd_iprintf(buffer
, "%s : %s\n", stream
->chip
->card
->longname
, stream
->pcm
->name
);
2081 if (stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
].num_formats
) {
2082 snd_iprintf(buffer
, "\nPlayback:\n");
2083 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2084 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2086 if (stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
].num_formats
) {
2087 snd_iprintf(buffer
, "\nCapture:\n");
2088 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2089 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2093 static void proc_pcm_format_add(struct snd_usb_stream
*stream
)
2095 struct snd_info_entry
*entry
;
2097 struct snd_card
*card
= stream
->chip
->card
;
2099 sprintf(name
, "stream%d", stream
->pcm_index
);
2100 if (! snd_card_proc_new(card
, name
, &entry
))
2101 snd_info_set_text_ops(entry
, stream
, 1024, proc_pcm_format_read
);
2106 * initialize the substream instance.
2109 static void init_substream(struct snd_usb_stream
*as
, int stream
, struct audioformat
*fp
)
2111 struct snd_usb_substream
*subs
= &as
->substream
[stream
];
2113 INIT_LIST_HEAD(&subs
->fmt_list
);
2114 spin_lock_init(&subs
->lock
);
2117 subs
->direction
= stream
;
2118 subs
->dev
= as
->chip
->dev
;
2119 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
2120 subs
->ops
= audio_urb_ops
[stream
];
2122 subs
->ops
= audio_urb_ops_high_speed
[stream
];
2123 snd_pcm_set_ops(as
->pcm
, stream
,
2124 stream
== SNDRV_PCM_STREAM_PLAYBACK
?
2125 &snd_usb_playback_ops
: &snd_usb_capture_ops
);
2127 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2128 subs
->formats
|= 1ULL << fp
->format
;
2129 subs
->endpoint
= fp
->endpoint
;
2130 subs
->num_formats
++;
2131 subs
->fmt_type
= fp
->fmt_type
;
2138 static void free_substream(struct snd_usb_substream
*subs
)
2140 struct list_head
*p
, *n
;
2142 if (! subs
->num_formats
)
2143 return; /* not initialized */
2144 list_for_each_safe(p
, n
, &subs
->fmt_list
) {
2145 struct audioformat
*fp
= list_entry(p
, struct audioformat
, list
);
2146 kfree(fp
->rate_table
);
2153 * free a usb stream instance
2155 static void snd_usb_audio_stream_free(struct snd_usb_stream
*stream
)
2157 free_substream(&stream
->substream
[0]);
2158 free_substream(&stream
->substream
[1]);
2159 list_del(&stream
->list
);
2163 static void snd_usb_audio_pcm_free(struct snd_pcm
*pcm
)
2165 struct snd_usb_stream
*stream
= pcm
->private_data
;
2168 snd_usb_audio_stream_free(stream
);
2174 * add this endpoint to the chip instance.
2175 * if a stream with the same endpoint already exists, append to it.
2176 * if not, create a new pcm stream.
2178 static int add_audio_endpoint(struct snd_usb_audio
*chip
, int stream
, struct audioformat
*fp
)
2180 struct list_head
*p
;
2181 struct snd_usb_stream
*as
;
2182 struct snd_usb_substream
*subs
;
2183 struct snd_pcm
*pcm
;
2186 list_for_each(p
, &chip
->pcm_list
) {
2187 as
= list_entry(p
, struct snd_usb_stream
, list
);
2188 if (as
->fmt_type
!= fp
->fmt_type
)
2190 subs
= &as
->substream
[stream
];
2191 if (! subs
->endpoint
)
2193 if (subs
->endpoint
== fp
->endpoint
) {
2194 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2195 subs
->num_formats
++;
2196 subs
->formats
|= 1ULL << fp
->format
;
2200 /* look for an empty stream */
2201 list_for_each(p
, &chip
->pcm_list
) {
2202 as
= list_entry(p
, struct snd_usb_stream
, list
);
2203 if (as
->fmt_type
!= fp
->fmt_type
)
2205 subs
= &as
->substream
[stream
];
2208 err
= snd_pcm_new_stream(as
->pcm
, stream
, 1);
2211 init_substream(as
, stream
, fp
);
2215 /* create a new pcm */
2216 as
= kmalloc(sizeof(*as
), GFP_KERNEL
);
2219 memset(as
, 0, sizeof(*as
));
2220 as
->pcm_index
= chip
->pcm_devs
;
2222 as
->fmt_type
= fp
->fmt_type
;
2223 err
= snd_pcm_new(chip
->card
, "USB Audio", chip
->pcm_devs
,
2224 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 1 : 0,
2225 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 0 : 1,
2232 pcm
->private_data
= as
;
2233 pcm
->private_free
= snd_usb_audio_pcm_free
;
2234 pcm
->info_flags
= 0;
2235 if (chip
->pcm_devs
> 0)
2236 sprintf(pcm
->name
, "USB Audio #%d", chip
->pcm_devs
);
2238 strcpy(pcm
->name
, "USB Audio");
2240 init_substream(as
, stream
, fp
);
2242 list_add(&as
->list
, &chip
->pcm_list
);
2245 proc_pcm_format_add(as
);
2252 * check if the device uses big-endian samples
2254 static int is_big_endian_format(struct snd_usb_audio
*chip
, struct audioformat
*fp
)
2256 switch (chip
->usb_id
) {
2257 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2258 if (fp
->endpoint
& USB_DIR_IN
)
2261 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2268 * parse the audio format type I descriptor
2269 * and returns the corresponding pcm format
2272 * @fp: audioformat record
2273 * @format: the format tag (wFormatTag)
2274 * @fmt: the format type descriptor
2276 static int parse_audio_format_i_type(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2277 int format
, unsigned char *fmt
)
2280 int sample_width
, sample_bytes
;
2282 /* FIXME: correct endianess and sign? */
2284 sample_width
= fmt
[6];
2285 sample_bytes
= fmt
[5];
2287 case 0: /* some devices don't define this correctly... */
2288 snd_printdd(KERN_INFO
"%d:%u:%d : format type 0 is detected, processed as PCM\n",
2289 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2291 case USB_AUDIO_FORMAT_PCM
:
2292 if (sample_width
> sample_bytes
* 8) {
2293 snd_printk(KERN_INFO
"%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2294 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
,
2295 sample_width
, sample_bytes
);
2297 /* check the format byte size */
2300 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2303 if (is_big_endian_format(chip
, fp
))
2304 pcm_format
= SNDRV_PCM_FORMAT_S16_BE
; /* grrr, big endian!! */
2306 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2309 if (is_big_endian_format(chip
, fp
))
2310 pcm_format
= SNDRV_PCM_FORMAT_S24_3BE
; /* grrr, big endian!! */
2312 pcm_format
= SNDRV_PCM_FORMAT_S24_3LE
;
2315 pcm_format
= SNDRV_PCM_FORMAT_S32_LE
;
2318 snd_printk(KERN_INFO
"%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2319 chip
->dev
->devnum
, fp
->iface
,
2320 fp
->altsetting
, sample_width
, sample_bytes
);
2324 case USB_AUDIO_FORMAT_PCM8
:
2325 /* Dallas DS4201 workaround */
2326 if (chip
->usb_id
== USB_ID(0x04fa, 0x4201))
2327 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2329 pcm_format
= SNDRV_PCM_FORMAT_U8
;
2331 case USB_AUDIO_FORMAT_IEEE_FLOAT
:
2332 pcm_format
= SNDRV_PCM_FORMAT_FLOAT_LE
;
2334 case USB_AUDIO_FORMAT_ALAW
:
2335 pcm_format
= SNDRV_PCM_FORMAT_A_LAW
;
2337 case USB_AUDIO_FORMAT_MU_LAW
:
2338 pcm_format
= SNDRV_PCM_FORMAT_MU_LAW
;
2341 snd_printk(KERN_INFO
"%d:%u:%d : unsupported format type %d\n",
2342 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2350 * parse the format descriptor and stores the possible sample rates
2351 * on the audioformat table.
2354 * @fp: audioformat record
2355 * @fmt: the format descriptor
2356 * @offset: the start offset of descriptor pointing the rate type
2357 * (7 for type I and II, 8 for type II)
2359 static int parse_audio_format_rates(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2360 unsigned char *fmt
, int offset
)
2362 int nr_rates
= fmt
[offset
];
2363 if (fmt
[0] < offset
+ 1 + 3 * (nr_rates
? nr_rates
: 2)) {
2364 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2365 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2371 * build the rate table and bitmap flags
2374 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2375 static unsigned int conv_rates
[] = {
2376 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2377 64000, 88200, 96000, 176400, 192000
2379 fp
->rate_table
= kmalloc(sizeof(int) * nr_rates
, GFP_KERNEL
);
2380 if (fp
->rate_table
== NULL
) {
2381 snd_printk(KERN_ERR
"cannot malloc\n");
2385 fp
->nr_rates
= nr_rates
;
2386 fp
->rate_min
= fp
->rate_max
= combine_triple(&fmt
[8]);
2387 for (r
= 0, idx
= offset
+ 1; r
< nr_rates
; r
++, idx
+= 3) {
2388 unsigned int rate
= fp
->rate_table
[r
] = combine_triple(&fmt
[idx
]);
2389 if (rate
< fp
->rate_min
)
2390 fp
->rate_min
= rate
;
2391 else if (rate
> fp
->rate_max
)
2392 fp
->rate_max
= rate
;
2393 for (c
= 0; c
< (int)ARRAY_SIZE(conv_rates
); c
++) {
2394 if (rate
== conv_rates
[c
]) {
2395 fp
->rates
|= (1 << c
);
2401 /* continuous rates */
2402 fp
->rates
= SNDRV_PCM_RATE_CONTINUOUS
;
2403 fp
->rate_min
= combine_triple(&fmt
[offset
+ 1]);
2404 fp
->rate_max
= combine_triple(&fmt
[offset
+ 4]);
2410 * parse the format type I and III descriptors
2412 static int parse_audio_format_i(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2413 int format
, unsigned char *fmt
)
2417 if (fmt
[3] == USB_FORMAT_TYPE_III
) {
2418 /* FIXME: the format type is really IECxxx
2419 * but we give normal PCM format to get the existing
2422 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2424 pcm_format
= parse_audio_format_i_type(chip
, fp
, format
, fmt
);
2428 fp
->format
= pcm_format
;
2429 fp
->channels
= fmt
[4];
2430 if (fp
->channels
< 1) {
2431 snd_printk(KERN_ERR
"%d:%u:%d : invalid channels %d\n",
2432 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fp
->channels
);
2435 return parse_audio_format_rates(chip
, fp
, fmt
, 7);
2439 * prase the format type II descriptor
2441 static int parse_audio_format_ii(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2442 int format
, unsigned char *fmt
)
2444 int brate
, framesize
;
2446 case USB_AUDIO_FORMAT_AC3
:
2447 /* FIXME: there is no AC3 format defined yet */
2448 // fp->format = SNDRV_PCM_FORMAT_AC3;
2449 fp
->format
= SNDRV_PCM_FORMAT_U8
; /* temporarily hack to receive byte streams */
2451 case USB_AUDIO_FORMAT_MPEG
:
2452 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2455 snd_printd(KERN_INFO
"%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
2456 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2457 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2461 brate
= combine_word(&fmt
[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2462 framesize
= combine_word(&fmt
[6]); /* fmt[6,7]: wSamplesPerFrame */
2463 snd_printd(KERN_INFO
"found format II with max.bitrate = %d, frame size=%d\n", brate
, framesize
);
2464 fp
->frame_size
= framesize
;
2465 return parse_audio_format_rates(chip
, fp
, fmt
, 8); /* fmt[8..] sample rates */
2468 static int parse_audio_format(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2469 int format
, unsigned char *fmt
, int stream
)
2474 case USB_FORMAT_TYPE_I
:
2475 case USB_FORMAT_TYPE_III
:
2476 err
= parse_audio_format_i(chip
, fp
, format
, fmt
);
2478 case USB_FORMAT_TYPE_II
:
2479 err
= parse_audio_format_ii(chip
, fp
, format
, fmt
);
2482 snd_printd(KERN_INFO
"%d:%u:%d : format type %d is not supported yet\n",
2483 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fmt
[3]);
2486 fp
->fmt_type
= fmt
[3];
2490 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
2491 /* extigy apparently supports sample rates other than 48k
2492 * but not in ordinary way. so we enable only 48k atm.
2494 if (chip
->usb_id
== USB_ID(0x041e, 0x3000) ||
2495 chip
->usb_id
== USB_ID(0x041e, 0x3020) ||
2496 chip
->usb_id
== USB_ID(0x041e, 0x3061)) {
2497 if (fmt
[3] == USB_FORMAT_TYPE_I
&&
2498 fp
->rates
!= SNDRV_PCM_RATE_48000
&&
2499 fp
->rates
!= SNDRV_PCM_RATE_96000
)
2506 static int parse_audio_endpoints(struct snd_usb_audio
*chip
, int iface_no
)
2508 struct usb_device
*dev
;
2509 struct usb_interface
*iface
;
2510 struct usb_host_interface
*alts
;
2511 struct usb_interface_descriptor
*altsd
;
2512 int i
, altno
, err
, stream
;
2514 struct audioformat
*fp
;
2515 unsigned char *fmt
, *csep
;
2519 /* parse the interface's altsettings */
2520 iface
= usb_ifnum_to_if(dev
, iface_no
);
2521 for (i
= 0; i
< iface
->num_altsetting
; i
++) {
2522 alts
= &iface
->altsetting
[i
];
2523 altsd
= get_iface_desc(alts
);
2524 /* skip invalid one */
2525 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2526 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2527 (altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
&&
2528 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_VENDOR_SPEC
) ||
2529 altsd
->bNumEndpoints
< 1 ||
2530 le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
) == 0)
2532 /* must be isochronous */
2533 if ((get_endpoint(alts
, 0)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) !=
2534 USB_ENDPOINT_XFER_ISOC
)
2536 /* check direction */
2537 stream
= (get_endpoint(alts
, 0)->bEndpointAddress
& USB_DIR_IN
) ?
2538 SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2539 altno
= altsd
->bAlternateSetting
;
2541 /* get audio formats */
2542 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, AS_GENERAL
);
2544 snd_printk(KERN_ERR
"%d:%u:%d : AS_GENERAL descriptor not found\n",
2545 dev
->devnum
, iface_no
, altno
);
2550 snd_printk(KERN_ERR
"%d:%u:%d : invalid AS_GENERAL desc\n",
2551 dev
->devnum
, iface_no
, altno
);
2555 format
= (fmt
[6] << 8) | fmt
[5]; /* remember the format value */
2557 /* get format type */
2558 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, FORMAT_TYPE
);
2560 snd_printk(KERN_ERR
"%d:%u:%d : no FORMAT_TYPE desc\n",
2561 dev
->devnum
, iface_no
, altno
);
2565 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2566 dev
->devnum
, iface_no
, altno
);
2570 csep
= snd_usb_find_desc(alts
->endpoint
[0].extra
, alts
->endpoint
[0].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2571 /* Creamware Noah has this descriptor after the 2nd endpoint */
2572 if (!csep
&& altsd
->bNumEndpoints
>= 2)
2573 csep
= snd_usb_find_desc(alts
->endpoint
[1].extra
, alts
->endpoint
[1].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2574 if (!csep
|| csep
[0] < 7 || csep
[2] != EP_GENERAL
) {
2575 snd_printk(KERN_ERR
"%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2576 dev
->devnum
, iface_no
, altno
);
2580 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2582 snd_printk(KERN_ERR
"cannot malloc\n");
2586 memset(fp
, 0, sizeof(*fp
));
2587 fp
->iface
= iface_no
;
2588 fp
->altsetting
= altno
;
2590 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2591 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2592 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2593 if (snd_usb_get_speed(dev
) == USB_SPEED_HIGH
)
2594 fp
->maxpacksize
= (((fp
->maxpacksize
>> 11) & 3) + 1)
2595 * (fp
->maxpacksize
& 0x7ff);
2596 fp
->attributes
= csep
[3];
2598 /* some quirks for attributes here */
2600 switch (chip
->usb_id
) {
2601 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2602 /* Optoplay sets the sample rate attribute although
2603 * it seems not supporting it in fact.
2605 fp
->attributes
&= ~EP_CS_ATTR_SAMPLE_RATE
;
2607 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2608 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2609 /* doesn't set the sample rate attribute, but supports it */
2610 fp
->attributes
|= EP_CS_ATTR_SAMPLE_RATE
;
2612 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2613 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2614 an older model 77d:223) */
2616 * plantronics headset and Griffin iMic have set adaptive-in
2617 * although it's really not...
2619 fp
->ep_attr
&= ~EP_ATTR_MASK
;
2620 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2621 fp
->ep_attr
|= EP_ATTR_ADAPTIVE
;
2623 fp
->ep_attr
|= EP_ATTR_SYNC
;
2627 /* ok, let's parse further... */
2628 if (parse_audio_format(chip
, fp
, format
, fmt
, stream
) < 0) {
2629 kfree(fp
->rate_table
);
2634 snd_printdd(KERN_INFO
"%d:%u:%d: add audio endpoint 0x%x\n", dev
->devnum
, iface_no
, i
, fp
->endpoint
);
2635 err
= add_audio_endpoint(chip
, stream
, fp
);
2637 kfree(fp
->rate_table
);
2641 /* try to set the interface... */
2642 usb_set_interface(chip
->dev
, iface_no
, altno
);
2643 init_usb_pitch(chip
->dev
, iface_no
, alts
, fp
);
2644 init_usb_sample_rate(chip
->dev
, iface_no
, alts
, fp
, fp
->rate_max
);
2651 * disconnect streams
2652 * called from snd_usb_audio_disconnect()
2654 static void snd_usb_stream_disconnect(struct list_head
*head
)
2657 struct snd_usb_stream
*as
;
2658 struct snd_usb_substream
*subs
;
2660 as
= list_entry(head
, struct snd_usb_stream
, list
);
2661 for (idx
= 0; idx
< 2; idx
++) {
2662 subs
= &as
->substream
[idx
];
2663 if (!subs
->num_formats
)
2665 release_substream_urbs(subs
, 1);
2666 subs
->interface
= -1;
2671 * parse audio control descriptor and create pcm/midi streams
2673 static int snd_usb_create_streams(struct snd_usb_audio
*chip
, int ctrlif
)
2675 struct usb_device
*dev
= chip
->dev
;
2676 struct usb_host_interface
*host_iface
;
2677 struct usb_interface
*iface
;
2681 /* find audiocontrol interface */
2682 host_iface
= &usb_ifnum_to_if(dev
, ctrlif
)->altsetting
[0];
2683 if (!(p1
= snd_usb_find_csint_desc(host_iface
->extra
, host_iface
->extralen
, NULL
, HEADER
))) {
2684 snd_printk(KERN_ERR
"cannot find HEADER\n");
2687 if (! p1
[7] || p1
[0] < 8 + p1
[7]) {
2688 snd_printk(KERN_ERR
"invalid HEADER\n");
2693 * parse all USB audio streaming interfaces
2695 for (i
= 0; i
< p1
[7]; i
++) {
2696 struct usb_host_interface
*alts
;
2697 struct usb_interface_descriptor
*altsd
;
2699 iface
= usb_ifnum_to_if(dev
, j
);
2701 snd_printk(KERN_ERR
"%d:%u:%d : does not exist\n",
2702 dev
->devnum
, ctrlif
, j
);
2705 if (usb_interface_claimed(iface
)) {
2706 snd_printdd(KERN_INFO
"%d:%d:%d: skipping, already claimed\n", dev
->devnum
, ctrlif
, j
);
2709 alts
= &iface
->altsetting
[0];
2710 altsd
= get_iface_desc(alts
);
2711 if ((altsd
->bInterfaceClass
== USB_CLASS_AUDIO
||
2712 altsd
->bInterfaceClass
== USB_CLASS_VENDOR_SPEC
) &&
2713 altsd
->bInterfaceSubClass
== USB_SUBCLASS_MIDI_STREAMING
) {
2714 if (snd_usb_create_midi_interface(chip
, iface
, NULL
) < 0) {
2715 snd_printk(KERN_ERR
"%d:%u:%d: cannot create sequencer device\n", dev
->devnum
, ctrlif
, j
);
2718 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2721 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2722 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2723 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
) {
2724 snd_printdd(KERN_ERR
"%d:%u:%d: skipping non-supported interface %d\n", dev
->devnum
, ctrlif
, j
, altsd
->bInterfaceClass
);
2725 /* skip non-supported classes */
2728 if (! parse_audio_endpoints(chip
, j
)) {
2729 usb_set_interface(dev
, j
, 0); /* reset the current interface */
2730 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2738 * create a stream for an endpoint/altsetting without proper descriptors
2740 static int create_fixed_stream_quirk(struct snd_usb_audio
*chip
,
2741 struct usb_interface
*iface
,
2742 const struct snd_usb_audio_quirk
*quirk
)
2744 struct audioformat
*fp
;
2745 struct usb_host_interface
*alts
;
2747 int *rate_table
= NULL
;
2749 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2751 snd_printk(KERN_ERR
"cannot malloc\n");
2754 memcpy(fp
, quirk
->data
, sizeof(*fp
));
2755 if (fp
->nr_rates
> 0) {
2756 rate_table
= kmalloc(sizeof(int) * fp
->nr_rates
, GFP_KERNEL
);
2761 memcpy(rate_table
, fp
->rate_table
, sizeof(int) * fp
->nr_rates
);
2762 fp
->rate_table
= rate_table
;
2765 stream
= (fp
->endpoint
& USB_DIR_IN
)
2766 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2767 err
= add_audio_endpoint(chip
, stream
, fp
);
2773 if (fp
->iface
!= get_iface_desc(&iface
->altsetting
[0])->bInterfaceNumber
||
2774 fp
->altset_idx
>= iface
->num_altsetting
) {
2779 alts
= &iface
->altsetting
[fp
->altset_idx
];
2780 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2781 init_usb_pitch(chip
->dev
, fp
->iface
, alts
, fp
);
2782 init_usb_sample_rate(chip
->dev
, fp
->iface
, alts
, fp
, fp
->rate_max
);
2787 * create a stream for an interface with proper descriptors
2789 static int create_standard_audio_quirk(struct snd_usb_audio
*chip
,
2790 struct usb_interface
*iface
,
2791 const struct snd_usb_audio_quirk
*quirk
)
2793 struct usb_host_interface
*alts
;
2794 struct usb_interface_descriptor
*altsd
;
2797 alts
= &iface
->altsetting
[0];
2798 altsd
= get_iface_desc(alts
);
2799 err
= parse_audio_endpoints(chip
, altsd
->bInterfaceNumber
);
2801 snd_printk(KERN_ERR
"cannot setup if %d: error %d\n",
2802 altsd
->bInterfaceNumber
, err
);
2805 /* reset the current interface */
2806 usb_set_interface(chip
->dev
, altsd
->bInterfaceNumber
, 0);
2811 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2812 * to detect the sample rate is by looking at wMaxPacketSize.
2814 static int create_ua700_ua25_quirk(struct snd_usb_audio
*chip
,
2815 struct usb_interface
*iface
,
2816 const struct snd_usb_audio_quirk
*quirk
)
2818 static const struct audioformat ua_format
= {
2819 .format
= SNDRV_PCM_FORMAT_S24_3LE
,
2821 .fmt_type
= USB_FORMAT_TYPE_I
,
2824 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2826 struct usb_host_interface
*alts
;
2827 struct usb_interface_descriptor
*altsd
;
2828 struct audioformat
*fp
;
2831 /* both PCM and MIDI interfaces have 2 altsettings */
2832 if (iface
->num_altsetting
!= 2)
2834 alts
= &iface
->altsetting
[1];
2835 altsd
= get_iface_desc(alts
);
2837 if (altsd
->bNumEndpoints
== 2) {
2838 static const struct snd_usb_midi_endpoint_info ua700_ep
= {
2839 .out_cables
= 0x0003,
2842 static const struct snd_usb_audio_quirk ua700_quirk
= {
2843 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2846 static const struct snd_usb_midi_endpoint_info ua25_ep
= {
2847 .out_cables
= 0x0001,
2850 static const struct snd_usb_audio_quirk ua25_quirk
= {
2851 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2854 if (chip
->usb_id
== USB_ID(0x0582, 0x002b))
2855 return snd_usb_create_midi_interface(chip
, iface
,
2858 return snd_usb_create_midi_interface(chip
, iface
,
2862 if (altsd
->bNumEndpoints
!= 1)
2865 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2868 memcpy(fp
, &ua_format
, sizeof(*fp
));
2870 fp
->iface
= altsd
->bInterfaceNumber
;
2871 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2872 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2873 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2875 switch (fp
->maxpacksize
) {
2877 fp
->rate_max
= fp
->rate_min
= 44100;
2881 fp
->rate_max
= fp
->rate_min
= 48000;
2885 fp
->rate_max
= fp
->rate_min
= 96000;
2888 snd_printk(KERN_ERR
"unknown sample rate\n");
2893 stream
= (fp
->endpoint
& USB_DIR_IN
)
2894 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2895 err
= add_audio_endpoint(chip
, stream
, fp
);
2900 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2905 * Create a stream for an Edirol UA-1000 interface.
2907 static int create_ua1000_quirk(struct snd_usb_audio
*chip
,
2908 struct usb_interface
*iface
,
2909 const struct snd_usb_audio_quirk
*quirk
)
2911 static const struct audioformat ua1000_format
= {
2912 .format
= SNDRV_PCM_FORMAT_S32_LE
,
2913 .fmt_type
= USB_FORMAT_TYPE_I
,
2917 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2919 struct usb_host_interface
*alts
;
2920 struct usb_interface_descriptor
*altsd
;
2921 struct audioformat
*fp
;
2924 if (iface
->num_altsetting
!= 2)
2926 alts
= &iface
->altsetting
[1];
2927 altsd
= get_iface_desc(alts
);
2928 if (alts
->extralen
!= 11 || alts
->extra
[1] != CS_AUDIO_INTERFACE
||
2929 altsd
->bNumEndpoints
!= 1)
2932 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2935 memcpy(fp
, &ua1000_format
, sizeof(*fp
));
2937 fp
->channels
= alts
->extra
[4];
2938 fp
->iface
= altsd
->bInterfaceNumber
;
2939 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2940 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2941 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2942 fp
->rate_max
= fp
->rate_min
= combine_triple(&alts
->extra
[8]);
2944 stream
= (fp
->endpoint
& USB_DIR_IN
)
2945 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2946 err
= add_audio_endpoint(chip
, stream
, fp
);
2951 /* FIXME: playback must be synchronized to capture */
2952 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2956 static int snd_usb_create_quirk(struct snd_usb_audio
*chip
,
2957 struct usb_interface
*iface
,
2958 const struct snd_usb_audio_quirk
*quirk
);
2961 * handle the quirks for the contained interfaces
2963 static int create_composite_quirk(struct snd_usb_audio
*chip
,
2964 struct usb_interface
*iface
,
2965 const struct snd_usb_audio_quirk
*quirk
)
2967 int probed_ifnum
= get_iface_desc(iface
->altsetting
)->bInterfaceNumber
;
2970 for (quirk
= quirk
->data
; quirk
->ifnum
>= 0; ++quirk
) {
2971 iface
= usb_ifnum_to_if(chip
->dev
, quirk
->ifnum
);
2974 if (quirk
->ifnum
!= probed_ifnum
&&
2975 usb_interface_claimed(iface
))
2977 err
= snd_usb_create_quirk(chip
, iface
, quirk
);
2980 if (quirk
->ifnum
!= probed_ifnum
)
2981 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2986 static int ignore_interface_quirk(struct snd_usb_audio
*chip
,
2987 struct usb_interface
*iface
,
2988 const struct snd_usb_audio_quirk
*quirk
)
2998 #define EXTIGY_FIRMWARE_SIZE_OLD 794
2999 #define EXTIGY_FIRMWARE_SIZE_NEW 483
3001 static int snd_usb_extigy_boot_quirk(struct usb_device
*dev
, struct usb_interface
*intf
)
3003 struct usb_host_config
*config
= dev
->actconfig
;
3006 if (le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_OLD
||
3007 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_NEW
) {
3008 snd_printdd("sending Extigy boot sequence...\n");
3009 /* Send message to force it to reconnect with full interface. */
3010 err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
,0),
3011 0x10, 0x43, 0x0001, 0x000a, NULL
, 0, 1000);
3012 if (err
< 0) snd_printdd("error sending boot message: %d\n", err
);
3013 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0,
3014 &dev
->descriptor
, sizeof(dev
->descriptor
));
3015 config
= dev
->actconfig
;
3016 if (err
< 0) snd_printdd("error usb_get_descriptor: %d\n", err
);
3017 err
= usb_reset_configuration(dev
);
3018 if (err
< 0) snd_printdd("error usb_reset_configuration: %d\n", err
);
3019 snd_printdd("extigy_boot: new boot length = %d\n",
3020 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
));
3021 return -ENODEV
; /* quit this anyway */
3026 static int snd_usb_audigy2nx_boot_quirk(struct usb_device
*dev
)
3030 snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), 0x2a,
3031 USB_DIR_IN
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3032 0, 0, &buf
, 1, 1000);
3034 snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), 0x29,
3035 USB_DIR_OUT
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3036 1, 2000, NULL
, 0, 1000);
3044 * audio-interface quirks
3046 * returns zero if no standard audio/MIDI parsing is needed.
3047 * returns a postive value if standard audio/midi interfaces are parsed
3049 * returns a negative value at error.
3051 static int snd_usb_create_quirk(struct snd_usb_audio
*chip
,
3052 struct usb_interface
*iface
,
3053 const struct snd_usb_audio_quirk
*quirk
)
3055 typedef int (*quirk_func_t
)(struct snd_usb_audio
*, struct usb_interface
*,
3056 const struct snd_usb_audio_quirk
*);
3057 static const quirk_func_t quirk_funcs
[] = {
3058 [QUIRK_IGNORE_INTERFACE
] = ignore_interface_quirk
,
3059 [QUIRK_COMPOSITE
] = create_composite_quirk
,
3060 [QUIRK_MIDI_STANDARD_INTERFACE
] = snd_usb_create_midi_interface
,
3061 [QUIRK_MIDI_FIXED_ENDPOINT
] = snd_usb_create_midi_interface
,
3062 [QUIRK_MIDI_YAMAHA
] = snd_usb_create_midi_interface
,
3063 [QUIRK_MIDI_MIDIMAN
] = snd_usb_create_midi_interface
,
3064 [QUIRK_MIDI_NOVATION
] = snd_usb_create_midi_interface
,
3065 [QUIRK_MIDI_RAW
] = snd_usb_create_midi_interface
,
3066 [QUIRK_MIDI_EMAGIC
] = snd_usb_create_midi_interface
,
3067 [QUIRK_MIDI_MIDITECH
] = snd_usb_create_midi_interface
,
3068 [QUIRK_AUDIO_STANDARD_INTERFACE
] = create_standard_audio_quirk
,
3069 [QUIRK_AUDIO_FIXED_ENDPOINT
] = create_fixed_stream_quirk
,
3070 [QUIRK_AUDIO_EDIROL_UA700_UA25
] = create_ua700_ua25_quirk
,
3071 [QUIRK_AUDIO_EDIROL_UA1000
] = create_ua1000_quirk
,
3074 if (quirk
->type
< QUIRK_TYPE_COUNT
) {
3075 return quirk_funcs
[quirk
->type
](chip
, iface
, quirk
);
3077 snd_printd(KERN_ERR
"invalid quirk type %d\n", quirk
->type
);
3084 * common proc files to show the usb device info
3086 static void proc_audio_usbbus_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
3088 struct snd_usb_audio
*chip
= entry
->private_data
;
3089 if (! chip
->shutdown
)
3090 snd_iprintf(buffer
, "%03d/%03d\n", chip
->dev
->bus
->busnum
, chip
->dev
->devnum
);
3093 static void proc_audio_usbid_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
3095 struct snd_usb_audio
*chip
= entry
->private_data
;
3096 if (! chip
->shutdown
)
3097 snd_iprintf(buffer
, "%04x:%04x\n",
3098 USB_ID_VENDOR(chip
->usb_id
),
3099 USB_ID_PRODUCT(chip
->usb_id
));
3102 static void snd_usb_audio_create_proc(struct snd_usb_audio
*chip
)
3104 struct snd_info_entry
*entry
;
3105 if (! snd_card_proc_new(chip
->card
, "usbbus", &entry
))
3106 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbbus_read
);
3107 if (! snd_card_proc_new(chip
->card
, "usbid", &entry
))
3108 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbid_read
);
3112 * free the chip instance
3114 * here we have to do not much, since pcm and controls are already freed
3118 static int snd_usb_audio_free(struct snd_usb_audio
*chip
)
3124 static int snd_usb_audio_dev_free(struct snd_device
*device
)
3126 struct snd_usb_audio
*chip
= device
->device_data
;
3127 return snd_usb_audio_free(chip
);
3132 * create a chip instance and set its names.
3134 static int snd_usb_audio_create(struct usb_device
*dev
, int idx
,
3135 const struct snd_usb_audio_quirk
*quirk
,
3136 struct snd_usb_audio
**rchip
)
3138 struct snd_card
*card
;
3139 struct snd_usb_audio
*chip
;
3142 static struct snd_device_ops ops
= {
3143 .dev_free
= snd_usb_audio_dev_free
,
3148 if (snd_usb_get_speed(dev
) != USB_SPEED_FULL
&&
3149 snd_usb_get_speed(dev
) != USB_SPEED_HIGH
) {
3150 snd_printk(KERN_ERR
"unknown device speed %d\n", snd_usb_get_speed(dev
));
3154 card
= snd_card_new(index
[idx
], id
[idx
], THIS_MODULE
, 0);
3156 snd_printk(KERN_ERR
"cannot create card instance %d\n", idx
);
3160 chip
= kzalloc(sizeof(*chip
), GFP_KERNEL
);
3162 snd_card_free(card
);
3169 chip
->usb_id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3170 le16_to_cpu(dev
->descriptor
.idProduct
));
3171 INIT_LIST_HEAD(&chip
->pcm_list
);
3172 INIT_LIST_HEAD(&chip
->midi_list
);
3173 INIT_LIST_HEAD(&chip
->mixer_list
);
3175 if ((err
= snd_device_new(card
, SNDRV_DEV_LOWLEVEL
, chip
, &ops
)) < 0) {
3176 snd_usb_audio_free(chip
);
3177 snd_card_free(card
);
3181 strcpy(card
->driver
, "USB-Audio");
3182 sprintf(component
, "USB%04x:%04x",
3183 USB_ID_VENDOR(chip
->usb_id
), USB_ID_PRODUCT(chip
->usb_id
));
3184 snd_component_add(card
, component
);
3186 /* retrieve the device string as shortname */
3187 if (quirk
&& quirk
->product_name
) {
3188 strlcpy(card
->shortname
, quirk
->product_name
, sizeof(card
->shortname
));
3190 if (!dev
->descriptor
.iProduct
||
3191 usb_string(dev
, dev
->descriptor
.iProduct
,
3192 card
->shortname
, sizeof(card
->shortname
)) <= 0) {
3193 /* no name available from anywhere, so use ID */
3194 sprintf(card
->shortname
, "USB Device %#04x:%#04x",
3195 USB_ID_VENDOR(chip
->usb_id
),
3196 USB_ID_PRODUCT(chip
->usb_id
));
3200 /* retrieve the vendor and device strings as longname */
3201 if (quirk
&& quirk
->vendor_name
) {
3202 len
= strlcpy(card
->longname
, quirk
->vendor_name
, sizeof(card
->longname
));
3204 if (dev
->descriptor
.iManufacturer
)
3205 len
= usb_string(dev
, dev
->descriptor
.iManufacturer
,
3206 card
->longname
, sizeof(card
->longname
));
3209 /* we don't really care if there isn't any vendor string */
3212 strlcat(card
->longname
, " ", sizeof(card
->longname
));
3214 strlcat(card
->longname
, card
->shortname
, sizeof(card
->longname
));
3216 len
= strlcat(card
->longname
, " at ", sizeof(card
->longname
));
3218 if (len
< sizeof(card
->longname
))
3219 usb_make_path(dev
, card
->longname
+ len
, sizeof(card
->longname
) - len
);
3221 strlcat(card
->longname
,
3222 snd_usb_get_speed(dev
) == USB_SPEED_FULL
? ", full speed" : ", high speed",
3223 sizeof(card
->longname
));
3225 snd_usb_audio_create_proc(chip
);
3233 * probe the active usb device
3235 * note that this can be called multiple times per a device, when it
3236 * includes multiple audio control interfaces.
3238 * thus we check the usb device pointer and creates the card instance
3239 * only at the first time. the successive calls of this function will
3240 * append the pcm interface to the corresponding card.
3242 static void *snd_usb_audio_probe(struct usb_device
*dev
,
3243 struct usb_interface
*intf
,
3244 const struct usb_device_id
*usb_id
)
3246 const struct snd_usb_audio_quirk
*quirk
= (const struct snd_usb_audio_quirk
*)usb_id
->driver_info
;
3248 struct snd_usb_audio
*chip
;
3249 struct usb_host_interface
*alts
;
3253 alts
= &intf
->altsetting
[0];
3254 ifnum
= get_iface_desc(alts
)->bInterfaceNumber
;
3255 id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3256 le16_to_cpu(dev
->descriptor
.idProduct
));
3258 if (quirk
&& quirk
->ifnum
>= 0 && ifnum
!= quirk
->ifnum
)
3261 /* SB Extigy needs special boot-up sequence */
3262 /* if more models come, this will go to the quirk list. */
3263 if (id
== USB_ID(0x041e, 0x3000)) {
3264 if (snd_usb_extigy_boot_quirk(dev
, intf
) < 0)
3267 /* SB Audigy 2 NX needs its own boot-up magic, too */
3268 if (id
== USB_ID(0x041e, 0x3020)) {
3269 if (snd_usb_audigy2nx_boot_quirk(dev
) < 0)
3274 * found a config. now register to ALSA
3277 /* check whether it's already registered */
3279 down(®ister_mutex
);
3280 for (i
= 0; i
< SNDRV_CARDS
; i
++) {
3281 if (usb_chip
[i
] && usb_chip
[i
]->dev
== dev
) {
3282 if (usb_chip
[i
]->shutdown
) {
3283 snd_printk(KERN_ERR
"USB device is in the shutdown state, cannot create a card instance\n");
3291 /* it's a fresh one.
3292 * now look for an empty slot and create a new card instance
3294 for (i
= 0; i
< SNDRV_CARDS
; i
++)
3295 if (enable
[i
] && ! usb_chip
[i
] &&
3296 (vid
[i
] == -1 || vid
[i
] == USB_ID_VENDOR(id
)) &&
3297 (pid
[i
] == -1 || pid
[i
] == USB_ID_PRODUCT(id
))) {
3298 if (snd_usb_audio_create(dev
, i
, quirk
, &chip
) < 0) {
3301 snd_card_set_dev(chip
->card
, &intf
->dev
);
3305 snd_printk(KERN_ERR
"no available usb audio device\n");
3310 err
= 1; /* continue */
3311 if (quirk
&& quirk
->ifnum
!= QUIRK_NO_INTERFACE
) {
3312 /* need some special handlings */
3313 if ((err
= snd_usb_create_quirk(chip
, intf
, quirk
)) < 0)
3318 /* create normal USB audio interfaces */
3319 if (snd_usb_create_streams(chip
, ifnum
) < 0 ||
3320 snd_usb_create_mixer(chip
, ifnum
) < 0) {
3325 /* we are allowed to call snd_card_register() many times */
3326 if (snd_card_register(chip
->card
) < 0) {
3330 usb_chip
[chip
->index
] = chip
;
3331 chip
->num_interfaces
++;
3332 up(®ister_mutex
);
3336 if (chip
&& !chip
->num_interfaces
)
3337 snd_card_free(chip
->card
);
3338 up(®ister_mutex
);
3344 * we need to take care of counter, since disconnection can be called also
3345 * many times as well as usb_audio_probe().
3347 static void snd_usb_audio_disconnect(struct usb_device
*dev
, void *ptr
)
3349 struct snd_usb_audio
*chip
;
3350 struct snd_card
*card
;
3351 struct list_head
*p
;
3353 if (ptr
== (void *)-1L)
3358 down(®ister_mutex
);
3360 chip
->num_interfaces
--;
3361 if (chip
->num_interfaces
<= 0) {
3362 snd_card_disconnect(card
);
3363 /* release the pcm resources */
3364 list_for_each(p
, &chip
->pcm_list
) {
3365 snd_usb_stream_disconnect(p
);
3367 /* release the midi resources */
3368 list_for_each(p
, &chip
->midi_list
) {
3369 snd_usbmidi_disconnect(p
);
3371 /* release mixer resources */
3372 list_for_each(p
, &chip
->mixer_list
) {
3373 snd_usb_mixer_disconnect(p
);
3375 usb_chip
[chip
->index
] = NULL
;
3376 up(®ister_mutex
);
3377 snd_card_free(card
);
3379 up(®ister_mutex
);
3384 * new 2.5 USB kernel API
3386 static int usb_audio_probe(struct usb_interface
*intf
,
3387 const struct usb_device_id
*id
)
3390 chip
= snd_usb_audio_probe(interface_to_usbdev(intf
), intf
, id
);
3392 dev_set_drvdata(&intf
->dev
, chip
);
3398 static void usb_audio_disconnect(struct usb_interface
*intf
)
3400 snd_usb_audio_disconnect(interface_to_usbdev(intf
),
3401 dev_get_drvdata(&intf
->dev
));
3405 static int __init
snd_usb_audio_init(void)
3407 if (nrpacks
< MIN_PACKS_URB
|| nrpacks
> MAX_PACKS
) {
3408 printk(KERN_WARNING
"invalid nrpacks value.\n");
3411 usb_register(&usb_audio_driver
);
3416 static void __exit
snd_usb_audio_cleanup(void)
3418 usb_deregister(&usb_audio_driver
);
3421 module_init(snd_usb_audio_init
);
3422 module_exit(snd_usb_audio_cleanup
);