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
);
479 * Prepare urb for streaming before playback starts.
481 * We don't care about (or have) any data, so we just send a transfer delimiter.
483 static int prepare_startup_playback_urb(struct snd_usb_substream
*subs
,
484 struct snd_pcm_runtime
*runtime
,
488 struct snd_urb_ctx
*ctx
= urb
->context
;
490 urb
->dev
= ctx
->subs
->dev
;
491 urb
->number_of_packets
= subs
->packs_per_ms
;
492 for (i
= 0; i
< subs
->packs_per_ms
; ++i
) {
493 urb
->iso_frame_desc
[i
].offset
= 0;
494 urb
->iso_frame_desc
[i
].length
= 0;
496 urb
->transfer_buffer_length
= 0;
501 * prepare urb for playback data pipe
503 * Since a URB can handle only a single linear buffer, we must use double
504 * buffering when the data to be transferred overflows the buffer boundary.
505 * To avoid inconsistencies when updating hwptr_done, we use double buffering
508 static int prepare_playback_urb(struct snd_usb_substream
*subs
,
509 struct snd_pcm_runtime
*runtime
,
515 int period_elapsed
= 0;
516 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
518 stride
= runtime
->frame_bits
>> 3;
521 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
522 urb
->number_of_packets
= 0;
523 spin_lock_irqsave(&subs
->lock
, flags
);
524 for (i
= 0; i
< ctx
->packets
; i
++) {
525 /* calculate the size of a packet */
527 counts
= subs
->maxframesize
; /* fixed */
529 subs
->phase
= (subs
->phase
& 0xffff)
530 + (subs
->freqm
<< subs
->datainterval
);
531 counts
= subs
->phase
>> 16;
532 if (counts
> subs
->maxframesize
)
533 counts
= subs
->maxframesize
;
535 /* set up descriptor */
536 urb
->iso_frame_desc
[i
].offset
= offs
* stride
;
537 urb
->iso_frame_desc
[i
].length
= counts
* stride
;
539 urb
->number_of_packets
++;
540 subs
->transfer_done
+= counts
;
541 if (subs
->transfer_done
>= runtime
->period_size
) {
542 subs
->transfer_done
-= runtime
->period_size
;
544 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
) {
545 if (subs
->transfer_done
> 0) {
546 /* FIXME: fill-max mode is not
548 offs
-= subs
->transfer_done
;
549 counts
-= subs
->transfer_done
;
550 urb
->iso_frame_desc
[i
].length
=
552 subs
->transfer_done
= 0;
555 if (i
< ctx
->packets
) {
556 /* add a transfer delimiter */
557 urb
->iso_frame_desc
[i
].offset
=
559 urb
->iso_frame_desc
[i
].length
= 0;
560 urb
->number_of_packets
++;
565 /* finish at the frame boundary at/after the period boundary */
566 if (period_elapsed
&&
567 (i
& (subs
->packs_per_ms
- 1)) == subs
->packs_per_ms
- 1)
570 if (subs
->hwptr_done
+ offs
> runtime
->buffer_size
) {
571 /* err, the transferred area goes over buffer boundary. */
572 unsigned int len
= runtime
->buffer_size
- subs
->hwptr_done
;
573 memcpy(urb
->transfer_buffer
,
574 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
576 memcpy(urb
->transfer_buffer
+ len
* stride
,
578 (offs
- len
) * stride
);
580 memcpy(urb
->transfer_buffer
,
581 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
584 subs
->hwptr_done
+= offs
;
585 if (subs
->hwptr_done
>= runtime
->buffer_size
)
586 subs
->hwptr_done
-= runtime
->buffer_size
;
587 spin_unlock_irqrestore(&subs
->lock
, flags
);
588 urb
->transfer_buffer_length
= offs
* stride
;
590 snd_pcm_period_elapsed(subs
->pcm_substream
);
595 * process after playback data complete
598 static int retire_playback_urb(struct snd_usb_substream
*subs
,
599 struct snd_pcm_runtime
*runtime
,
608 static struct snd_urb_ops audio_urb_ops
[2] = {
610 .prepare
= prepare_startup_playback_urb
,
611 .retire
= retire_playback_urb
,
612 .prepare_sync
= prepare_playback_sync_urb
,
613 .retire_sync
= retire_playback_sync_urb
,
616 .prepare
= prepare_capture_urb
,
617 .retire
= retire_capture_urb
,
618 .prepare_sync
= prepare_capture_sync_urb
,
619 .retire_sync
= retire_capture_sync_urb
,
623 static struct snd_urb_ops audio_urb_ops_high_speed
[2] = {
625 .prepare
= prepare_startup_playback_urb
,
626 .retire
= retire_playback_urb
,
627 .prepare_sync
= prepare_playback_sync_urb_hs
,
628 .retire_sync
= retire_playback_sync_urb_hs
,
631 .prepare
= prepare_capture_urb
,
632 .retire
= retire_capture_urb
,
633 .prepare_sync
= prepare_capture_sync_urb_hs
,
634 .retire_sync
= retire_capture_sync_urb
,
639 * complete callback from data urb
641 static void snd_complete_urb(struct urb
*urb
, struct pt_regs
*regs
)
643 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
644 struct snd_usb_substream
*subs
= ctx
->subs
;
645 struct snd_pcm_substream
*substream
= ctx
->subs
->pcm_substream
;
648 if ((subs
->running
&& subs
->ops
.retire(subs
, substream
->runtime
, urb
)) ||
649 ! subs
->running
|| /* can be stopped during retire callback */
650 (err
= subs
->ops
.prepare(subs
, substream
->runtime
, urb
)) < 0 ||
651 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
652 clear_bit(ctx
->index
, &subs
->active_mask
);
654 snd_printd(KERN_ERR
"cannot submit urb (err = %d)\n", err
);
655 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
662 * complete callback from sync urb
664 static void snd_complete_sync_urb(struct urb
*urb
, struct pt_regs
*regs
)
666 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
667 struct snd_usb_substream
*subs
= ctx
->subs
;
668 struct snd_pcm_substream
*substream
= ctx
->subs
->pcm_substream
;
671 if ((subs
->running
&& subs
->ops
.retire_sync(subs
, substream
->runtime
, urb
)) ||
672 ! subs
->running
|| /* can be stopped during retire callback */
673 (err
= subs
->ops
.prepare_sync(subs
, substream
->runtime
, urb
)) < 0 ||
674 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
675 clear_bit(ctx
->index
+ 16, &subs
->active_mask
);
677 snd_printd(KERN_ERR
"cannot submit sync urb (err = %d)\n", err
);
678 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
684 /* get the physical page pointer at the given offset */
685 static struct page
*snd_pcm_get_vmalloc_page(struct snd_pcm_substream
*subs
,
686 unsigned long offset
)
688 void *pageptr
= subs
->runtime
->dma_area
+ offset
;
689 return vmalloc_to_page(pageptr
);
692 /* allocate virtual buffer; may be called more than once */
693 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream
*subs
, size_t size
)
695 struct snd_pcm_runtime
*runtime
= subs
->runtime
;
696 if (runtime
->dma_area
) {
697 if (runtime
->dma_bytes
>= size
)
698 return 0; /* already large enough */
699 vfree(runtime
->dma_area
);
701 runtime
->dma_area
= vmalloc(size
);
702 if (! runtime
->dma_area
)
704 runtime
->dma_bytes
= size
;
708 /* free virtual buffer; may be called more than once */
709 static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream
*subs
)
711 struct snd_pcm_runtime
*runtime
= subs
->runtime
;
712 if (runtime
->dma_area
) {
713 vfree(runtime
->dma_area
);
714 runtime
->dma_area
= NULL
;
721 * unlink active urbs.
723 static int deactivate_urbs(struct snd_usb_substream
*subs
, int force
, int can_sleep
)
730 if (!force
&& subs
->stream
->chip
->shutdown
) /* to be sure... */
733 async
= !can_sleep
&& async_unlink
;
735 if (! async
&& in_interrupt())
738 for (i
= 0; i
< subs
->nurbs
; i
++) {
739 if (test_bit(i
, &subs
->active_mask
)) {
740 if (! test_and_set_bit(i
, &subs
->unlink_mask
)) {
741 struct urb
*u
= subs
->dataurb
[i
].urb
;
749 if (subs
->syncpipe
) {
750 for (i
= 0; i
< SYNC_URBS
; i
++) {
751 if (test_bit(i
+16, &subs
->active_mask
)) {
752 if (! test_and_set_bit(i
+16, &subs
->unlink_mask
)) {
753 struct urb
*u
= subs
->syncurb
[i
].urb
;
767 * set up and start data/sync urbs
769 static int start_urbs(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
)
774 if (subs
->stream
->chip
->shutdown
)
777 for (i
= 0; i
< subs
->nurbs
; i
++) {
778 snd_assert(subs
->dataurb
[i
].urb
, return -EINVAL
);
779 if (subs
->ops
.prepare(subs
, runtime
, subs
->dataurb
[i
].urb
) < 0) {
780 snd_printk(KERN_ERR
"cannot prepare datapipe for urb %d\n", i
);
784 if (subs
->syncpipe
) {
785 for (i
= 0; i
< SYNC_URBS
; i
++) {
786 snd_assert(subs
->syncurb
[i
].urb
, return -EINVAL
);
787 if (subs
->ops
.prepare_sync(subs
, runtime
, subs
->syncurb
[i
].urb
) < 0) {
788 snd_printk(KERN_ERR
"cannot prepare syncpipe for urb %d\n", i
);
794 subs
->active_mask
= 0;
795 subs
->unlink_mask
= 0;
797 for (i
= 0; i
< subs
->nurbs
; i
++) {
798 if ((err
= usb_submit_urb(subs
->dataurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
799 snd_printk(KERN_ERR
"cannot submit datapipe for urb %d, err = %d\n", i
, err
);
802 set_bit(i
, &subs
->active_mask
);
804 if (subs
->syncpipe
) {
805 for (i
= 0; i
< SYNC_URBS
; i
++) {
806 if ((err
= usb_submit_urb(subs
->syncurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
807 snd_printk(KERN_ERR
"cannot submit syncpipe for urb %d, err = %d\n", i
, err
);
810 set_bit(i
+ 16, &subs
->active_mask
);
816 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
817 deactivate_urbs(subs
, 0, 0);
823 * wait until all urbs are processed.
825 static int wait_clear_urbs(struct snd_usb_substream
*subs
)
827 unsigned long end_time
= jiffies
+ msecs_to_jiffies(1000);
833 for (i
= 0; i
< subs
->nurbs
; i
++) {
834 if (test_bit(i
, &subs
->active_mask
))
837 if (subs
->syncpipe
) {
838 for (i
= 0; i
< SYNC_URBS
; i
++) {
839 if (test_bit(i
+ 16, &subs
->active_mask
))
845 schedule_timeout_uninterruptible(1);
846 } while (time_before(jiffies
, end_time
));
848 snd_printk(KERN_ERR
"timeout: still %d active urbs..\n", alive
);
854 * return the current pcm pointer. just return the hwptr_done value.
856 static snd_pcm_uframes_t
snd_usb_pcm_pointer(struct snd_pcm_substream
*substream
)
858 struct snd_usb_substream
*subs
;
859 snd_pcm_uframes_t hwptr_done
;
861 subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
862 spin_lock(&subs
->lock
);
863 hwptr_done
= subs
->hwptr_done
;
864 spin_unlock(&subs
->lock
);
870 * start/stop playback substream
872 static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream
*substream
,
875 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
878 case SNDRV_PCM_TRIGGER_START
:
879 subs
->ops
.prepare
= prepare_playback_urb
;
881 case SNDRV_PCM_TRIGGER_STOP
:
882 return deactivate_urbs(subs
, 0, 0);
889 * start/stop capture substream
891 static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream
*substream
,
894 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
897 case SNDRV_PCM_TRIGGER_START
:
898 return start_urbs(subs
, substream
->runtime
);
899 case SNDRV_PCM_TRIGGER_STOP
:
900 return deactivate_urbs(subs
, 0, 0);
910 static void release_urb_ctx(struct snd_urb_ctx
*u
)
914 usb_buffer_free(u
->subs
->dev
, u
->buffer_size
,
915 u
->urb
->transfer_buffer
,
916 u
->urb
->transfer_dma
);
917 usb_free_urb(u
->urb
);
923 * release a substream
925 static void release_substream_urbs(struct snd_usb_substream
*subs
, int force
)
929 /* stop urbs (to be sure) */
930 deactivate_urbs(subs
, force
, 1);
931 wait_clear_urbs(subs
);
933 for (i
= 0; i
< MAX_URBS
; i
++)
934 release_urb_ctx(&subs
->dataurb
[i
]);
935 for (i
= 0; i
< SYNC_URBS
; i
++)
936 release_urb_ctx(&subs
->syncurb
[i
]);
937 usb_buffer_free(subs
->dev
, SYNC_URBS
* 4,
938 subs
->syncbuf
, subs
->sync_dma
);
939 subs
->syncbuf
= NULL
;
944 * initialize a substream for plaback/capture
946 static int init_substream_urbs(struct snd_usb_substream
*subs
, unsigned int period_bytes
,
947 unsigned int rate
, unsigned int frame_bits
)
949 unsigned int maxsize
, n
, i
;
950 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
951 unsigned int npacks
[MAX_URBS
], urb_packs
, total_packs
, packs_per_ms
;
953 /* calculate the frequency in 16.16 format */
954 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
955 subs
->freqn
= get_usb_full_speed_rate(rate
);
957 subs
->freqn
= get_usb_high_speed_rate(rate
);
958 subs
->freqm
= subs
->freqn
;
959 /* calculate max. frequency */
960 if (subs
->maxpacksize
) {
961 /* whatever fits into a max. size packet */
962 maxsize
= subs
->maxpacksize
;
963 subs
->freqmax
= (maxsize
/ (frame_bits
>> 3))
964 << (16 - subs
->datainterval
);
966 /* no max. packet size: just take 25% higher than nominal */
967 subs
->freqmax
= subs
->freqn
+ (subs
->freqn
>> 2);
968 maxsize
= ((subs
->freqmax
+ 0xffff) * (frame_bits
>> 3))
969 >> (16 - subs
->datainterval
);
974 subs
->curpacksize
= subs
->maxpacksize
;
976 subs
->curpacksize
= maxsize
;
978 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
)
979 packs_per_ms
= 8 >> subs
->datainterval
;
982 subs
->packs_per_ms
= packs_per_ms
;
986 urb_packs
= max(urb_packs
, (unsigned int)MIN_PACKS_URB
);
987 urb_packs
= min(urb_packs
, (unsigned int)MAX_PACKS
);
990 urb_packs
*= packs_per_ms
;
992 /* decide how many packets to be used */
994 unsigned int minsize
;
995 /* determine how small a packet can be */
996 minsize
= (subs
->freqn
>> (16 - subs
->datainterval
))
998 /* with sync from device, assume it can be 12% lower */
1000 minsize
-= minsize
>> 3;
1001 minsize
= max(minsize
, 1u);
1002 total_packs
= (period_bytes
+ minsize
- 1) / minsize
;
1003 /* round up to multiple of packs_per_ms */
1004 total_packs
= (total_packs
+ packs_per_ms
- 1)
1005 & ~(packs_per_ms
- 1);
1006 /* we need at least two URBs for queueing */
1007 if (total_packs
< 2 * MIN_PACKS_URB
* packs_per_ms
)
1008 total_packs
= 2 * MIN_PACKS_URB
* packs_per_ms
;
1010 total_packs
= MAX_URBS
* urb_packs
;
1012 subs
->nurbs
= (total_packs
+ urb_packs
- 1) / urb_packs
;
1013 if (subs
->nurbs
> MAX_URBS
) {
1015 subs
->nurbs
= MAX_URBS
;
1016 total_packs
= MAX_URBS
* urb_packs
;
1019 for (i
= 0; i
< subs
->nurbs
; i
++) {
1020 npacks
[i
] = n
> urb_packs
? urb_packs
: n
;
1023 if (subs
->nurbs
<= 1) {
1024 /* too little - we need at least two packets
1025 * to ensure contiguous playback/capture
1028 npacks
[0] = (total_packs
+ 1) / 2;
1029 npacks
[1] = total_packs
- npacks
[0];
1030 } else if (npacks
[subs
->nurbs
-1] < MIN_PACKS_URB
* packs_per_ms
) {
1031 /* the last packet is too small.. */
1032 if (subs
->nurbs
> 2) {
1033 /* merge to the first one */
1034 npacks
[0] += npacks
[subs
->nurbs
- 1];
1039 npacks
[0] = (total_packs
+ 1) / 2;
1040 npacks
[1] = total_packs
- npacks
[0];
1044 /* allocate and initialize data urbs */
1045 for (i
= 0; i
< subs
->nurbs
; i
++) {
1046 struct snd_urb_ctx
*u
= &subs
->dataurb
[i
];
1049 u
->packets
= npacks
[i
];
1050 u
->buffer_size
= maxsize
* u
->packets
;
1051 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
)
1052 u
->packets
++; /* for transfer delimiter */
1053 u
->urb
= usb_alloc_urb(u
->packets
, GFP_KERNEL
);
1056 u
->urb
->transfer_buffer
=
1057 usb_buffer_alloc(subs
->dev
, u
->buffer_size
, GFP_KERNEL
,
1058 &u
->urb
->transfer_dma
);
1059 if (! u
->urb
->transfer_buffer
)
1061 u
->urb
->pipe
= subs
->datapipe
;
1062 u
->urb
->transfer_flags
= URB_ISO_ASAP
| URB_NO_TRANSFER_DMA_MAP
;
1063 u
->urb
->interval
= 1 << subs
->datainterval
;
1064 u
->urb
->context
= u
;
1065 u
->urb
->complete
= snd_complete_urb
;
1068 if (subs
->syncpipe
) {
1069 /* allocate and initialize sync urbs */
1070 subs
->syncbuf
= usb_buffer_alloc(subs
->dev
, SYNC_URBS
* 4,
1071 GFP_KERNEL
, &subs
->sync_dma
);
1072 if (! subs
->syncbuf
)
1074 for (i
= 0; i
< SYNC_URBS
; i
++) {
1075 struct snd_urb_ctx
*u
= &subs
->syncurb
[i
];
1079 u
->urb
= usb_alloc_urb(1, GFP_KERNEL
);
1082 u
->urb
->transfer_buffer
= subs
->syncbuf
+ i
* 4;
1083 u
->urb
->transfer_dma
= subs
->sync_dma
+ i
* 4;
1084 u
->urb
->transfer_buffer_length
= 4;
1085 u
->urb
->pipe
= subs
->syncpipe
;
1086 u
->urb
->transfer_flags
= URB_ISO_ASAP
|
1087 URB_NO_TRANSFER_DMA_MAP
;
1088 u
->urb
->number_of_packets
= 1;
1089 u
->urb
->interval
= 1 << subs
->syncinterval
;
1090 u
->urb
->context
= u
;
1091 u
->urb
->complete
= snd_complete_sync_urb
;
1097 release_substream_urbs(subs
, 0);
1103 * find a matching audio format
1105 static struct audioformat
*find_format(struct snd_usb_substream
*subs
, unsigned int format
,
1106 unsigned int rate
, unsigned int channels
)
1108 struct list_head
*p
;
1109 struct audioformat
*found
= NULL
;
1110 int cur_attr
= 0, attr
;
1112 list_for_each(p
, &subs
->fmt_list
) {
1113 struct audioformat
*fp
;
1114 fp
= list_entry(p
, struct audioformat
, list
);
1115 if (fp
->format
!= format
|| fp
->channels
!= channels
)
1117 if (rate
< fp
->rate_min
|| rate
> fp
->rate_max
)
1119 if (! (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)) {
1121 for (i
= 0; i
< fp
->nr_rates
; i
++)
1122 if (fp
->rate_table
[i
] == rate
)
1124 if (i
>= fp
->nr_rates
)
1127 attr
= fp
->ep_attr
& EP_ATTR_MASK
;
1133 /* avoid async out and adaptive in if the other method
1134 * supports the same format.
1135 * this is a workaround for the case like
1136 * M-audio audiophile USB.
1138 if (attr
!= cur_attr
) {
1139 if ((attr
== EP_ATTR_ASYNC
&&
1140 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1141 (attr
== EP_ATTR_ADAPTIVE
&&
1142 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
))
1144 if ((cur_attr
== EP_ATTR_ASYNC
&&
1145 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1146 (cur_attr
== EP_ATTR_ADAPTIVE
&&
1147 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
)) {
1153 /* find the format with the largest max. packet size */
1154 if (fp
->maxpacksize
> found
->maxpacksize
) {
1164 * initialize the picth control and sample rate
1166 static int init_usb_pitch(struct usb_device
*dev
, int iface
,
1167 struct usb_host_interface
*alts
,
1168 struct audioformat
*fmt
)
1171 unsigned char data
[1];
1174 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1175 /* if endpoint has pitch control, enable it */
1176 if (fmt
->attributes
& EP_CS_ATTR_PITCH_CONTROL
) {
1178 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1179 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1180 PITCH_CONTROL
<< 8, ep
, data
, 1, 1000)) < 0) {
1181 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH\n",
1182 dev
->devnum
, iface
, ep
);
1189 static int init_usb_sample_rate(struct usb_device
*dev
, int iface
,
1190 struct usb_host_interface
*alts
,
1191 struct audioformat
*fmt
, int rate
)
1194 unsigned char data
[3];
1197 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1198 /* if endpoint has sampling rate control, set it */
1199 if (fmt
->attributes
& EP_CS_ATTR_SAMPLE_RATE
) {
1202 data
[1] = rate
>> 8;
1203 data
[2] = rate
>> 16;
1204 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1205 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1206 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1207 snd_printk(KERN_ERR
"%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1208 dev
->devnum
, iface
, fmt
->altsetting
, rate
, ep
);
1211 if ((err
= snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), GET_CUR
,
1212 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_IN
,
1213 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1214 snd_printk(KERN_WARNING
"%d:%d:%d: cannot get freq at ep 0x%x\n",
1215 dev
->devnum
, iface
, fmt
->altsetting
, ep
);
1216 return 0; /* some devices don't support reading */
1218 crate
= data
[0] | (data
[1] << 8) | (data
[2] << 16);
1219 if (crate
!= rate
) {
1220 snd_printd(KERN_WARNING
"current rate %d is different from the runtime rate %d\n", crate
, rate
);
1221 // runtime->rate = crate;
1228 * find a matching format and set up the interface
1230 static int set_format(struct snd_usb_substream
*subs
, struct audioformat
*fmt
)
1232 struct usb_device
*dev
= subs
->dev
;
1233 struct usb_host_interface
*alts
;
1234 struct usb_interface_descriptor
*altsd
;
1235 struct usb_interface
*iface
;
1236 unsigned int ep
, attr
;
1237 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
1240 iface
= usb_ifnum_to_if(dev
, fmt
->iface
);
1241 snd_assert(iface
, return -EINVAL
);
1242 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1243 altsd
= get_iface_desc(alts
);
1244 snd_assert(altsd
->bAlternateSetting
== fmt
->altsetting
, return -EINVAL
);
1246 if (fmt
== subs
->cur_audiofmt
)
1249 /* close the old interface */
1250 if (subs
->interface
>= 0 && subs
->interface
!= fmt
->iface
) {
1251 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1252 subs
->interface
= -1;
1257 if (subs
->interface
!= fmt
->iface
|| subs
->format
!= fmt
->altset_idx
) {
1258 if (usb_set_interface(dev
, fmt
->iface
, fmt
->altsetting
) < 0) {
1259 snd_printk(KERN_ERR
"%d:%d:%d: usb_set_interface failed\n",
1260 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1263 snd_printdd(KERN_INFO
"setting usb interface %d:%d\n", fmt
->iface
, fmt
->altsetting
);
1264 subs
->interface
= fmt
->iface
;
1265 subs
->format
= fmt
->altset_idx
;
1268 /* create a data pipe */
1269 ep
= fmt
->endpoint
& USB_ENDPOINT_NUMBER_MASK
;
1271 subs
->datapipe
= usb_sndisocpipe(dev
, ep
);
1273 subs
->datapipe
= usb_rcvisocpipe(dev
, ep
);
1274 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
&&
1275 get_endpoint(alts
, 0)->bInterval
>= 1 &&
1276 get_endpoint(alts
, 0)->bInterval
<= 4)
1277 subs
->datainterval
= get_endpoint(alts
, 0)->bInterval
- 1;
1279 subs
->datainterval
= 0;
1280 subs
->syncpipe
= subs
->syncinterval
= 0;
1281 subs
->maxpacksize
= fmt
->maxpacksize
;
1284 /* we need a sync pipe in async OUT or adaptive IN mode */
1285 /* check the number of EP, since some devices have broken
1286 * descriptors which fool us. if it has only one EP,
1287 * assume it as adaptive-out or sync-in.
1289 attr
= fmt
->ep_attr
& EP_ATTR_MASK
;
1290 if (((is_playback
&& attr
== EP_ATTR_ASYNC
) ||
1291 (! is_playback
&& attr
== EP_ATTR_ADAPTIVE
)) &&
1292 altsd
->bNumEndpoints
>= 2) {
1293 /* check sync-pipe endpoint */
1294 /* ... and check descriptor size before accessing bSynchAddress
1295 because there is a version of the SB Audigy 2 NX firmware lacking
1296 the audio fields in the endpoint descriptors */
1297 if ((get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) != 0x01 ||
1298 (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1299 get_endpoint(alts
, 1)->bSynchAddress
!= 0)) {
1300 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1301 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1304 ep
= get_endpoint(alts
, 1)->bEndpointAddress
;
1305 if (get_endpoint(alts
, 0)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1306 (( is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
| USB_DIR_IN
)) ||
1307 (!is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
& ~USB_DIR_IN
)))) {
1308 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1309 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1312 ep
&= USB_ENDPOINT_NUMBER_MASK
;
1314 subs
->syncpipe
= usb_rcvisocpipe(dev
, ep
);
1316 subs
->syncpipe
= usb_sndisocpipe(dev
, ep
);
1317 if (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1318 get_endpoint(alts
, 1)->bRefresh
>= 1 &&
1319 get_endpoint(alts
, 1)->bRefresh
<= 9)
1320 subs
->syncinterval
= get_endpoint(alts
, 1)->bRefresh
;
1321 else if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
1322 subs
->syncinterval
= 1;
1323 else if (get_endpoint(alts
, 1)->bInterval
>= 1 &&
1324 get_endpoint(alts
, 1)->bInterval
<= 16)
1325 subs
->syncinterval
= get_endpoint(alts
, 1)->bInterval
- 1;
1327 subs
->syncinterval
= 3;
1330 /* always fill max packet size */
1331 if (fmt
->attributes
& EP_CS_ATTR_FILL_MAX
)
1334 if ((err
= init_usb_pitch(dev
, subs
->interface
, alts
, fmt
)) < 0)
1337 subs
->cur_audiofmt
= fmt
;
1340 printk("setting done: format = %d, rate = %d, channels = %d\n",
1341 fmt
->format
, fmt
->rate
, fmt
->channels
);
1342 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1343 subs
->datapipe
, subs
->syncpipe
);
1350 * hw_params callback
1352 * allocate a buffer and set the given audio format.
1354 * so far we use a physically linear buffer although packetize transfer
1355 * doesn't need a continuous area.
1356 * if sg buffer is supported on the later version of alsa, we'll follow
1359 static int snd_usb_hw_params(struct snd_pcm_substream
*substream
,
1360 struct snd_pcm_hw_params
*hw_params
)
1362 struct snd_usb_substream
*subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
1363 struct audioformat
*fmt
;
1364 unsigned int channels
, rate
, format
;
1367 ret
= snd_pcm_alloc_vmalloc_buffer(substream
,
1368 params_buffer_bytes(hw_params
));
1372 format
= params_format(hw_params
);
1373 rate
= params_rate(hw_params
);
1374 channels
= params_channels(hw_params
);
1375 fmt
= find_format(subs
, format
, rate
, channels
);
1377 snd_printd(KERN_DEBUG
"cannot set format: format = %s, rate = %d, channels = %d\n",
1378 snd_pcm_format_name(format
), rate
, channels
);
1382 changed
= subs
->cur_audiofmt
!= fmt
||
1383 subs
->period_bytes
!= params_period_bytes(hw_params
) ||
1384 subs
->cur_rate
!= rate
;
1385 if ((ret
= set_format(subs
, fmt
)) < 0)
1388 if (subs
->cur_rate
!= rate
) {
1389 struct usb_host_interface
*alts
;
1390 struct usb_interface
*iface
;
1391 iface
= usb_ifnum_to_if(subs
->dev
, fmt
->iface
);
1392 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1393 ret
= init_usb_sample_rate(subs
->dev
, subs
->interface
, alts
, fmt
, rate
);
1396 subs
->cur_rate
= rate
;
1400 /* format changed */
1401 release_substream_urbs(subs
, 0);
1402 /* influenced: period_bytes, channels, rate, format, */
1403 ret
= init_substream_urbs(subs
, params_period_bytes(hw_params
),
1404 params_rate(hw_params
),
1405 snd_pcm_format_physical_width(params_format(hw_params
)) * params_channels(hw_params
));
1414 * reset the audio format and release the buffer
1416 static int snd_usb_hw_free(struct snd_pcm_substream
*substream
)
1418 struct snd_usb_substream
*subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
1420 subs
->cur_audiofmt
= NULL
;
1422 subs
->period_bytes
= 0;
1423 release_substream_urbs(subs
, 0);
1424 return snd_pcm_free_vmalloc_buffer(substream
);
1430 * only a few subtle things...
1432 static int snd_usb_pcm_prepare(struct snd_pcm_substream
*substream
)
1434 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1435 struct snd_usb_substream
*subs
= runtime
->private_data
;
1437 if (! subs
->cur_audiofmt
) {
1438 snd_printk(KERN_ERR
"usbaudio: no format is specified!\n");
1442 /* some unit conversions in runtime */
1443 subs
->maxframesize
= bytes_to_frames(runtime
, subs
->maxpacksize
);
1444 subs
->curframesize
= bytes_to_frames(runtime
, subs
->curpacksize
);
1446 /* reset the pointer */
1447 subs
->hwptr_done
= 0;
1448 subs
->transfer_done
= 0;
1451 /* clear urbs (to be sure) */
1452 deactivate_urbs(subs
, 0, 1);
1453 wait_clear_urbs(subs
);
1455 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1456 * updates for all URBs would happen at the same time when starting */
1457 if (subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) {
1458 subs
->ops
.prepare
= prepare_startup_playback_urb
;
1459 return start_urbs(subs
, runtime
);
1464 static struct snd_pcm_hardware snd_usb_playback
=
1466 .info
= SNDRV_PCM_INFO_MMAP
|
1467 SNDRV_PCM_INFO_MMAP_VALID
|
1468 SNDRV_PCM_INFO_BATCH
|
1469 SNDRV_PCM_INFO_INTERLEAVED
|
1470 SNDRV_PCM_INFO_BLOCK_TRANSFER
,
1471 .buffer_bytes_max
= 1024 * 1024,
1472 .period_bytes_min
= 64,
1473 .period_bytes_max
= 512 * 1024,
1475 .periods_max
= 1024,
1478 static struct snd_pcm_hardware snd_usb_capture
=
1480 .info
= SNDRV_PCM_INFO_MMAP
|
1481 SNDRV_PCM_INFO_MMAP_VALID
|
1482 SNDRV_PCM_INFO_BATCH
|
1483 SNDRV_PCM_INFO_INTERLEAVED
|
1484 SNDRV_PCM_INFO_BLOCK_TRANSFER
,
1485 .buffer_bytes_max
= 1024 * 1024,
1486 .period_bytes_min
= 64,
1487 .period_bytes_max
= 512 * 1024,
1489 .periods_max
= 1024,
1496 #ifdef HW_CONST_DEBUG
1497 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1499 #define hwc_debug(fmt, args...) /**/
1502 static int hw_check_valid_format(struct snd_pcm_hw_params
*params
, struct audioformat
*fp
)
1504 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1505 struct snd_interval
*ct
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1506 struct snd_mask
*fmts
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1508 /* check the format */
1509 if (! snd_mask_test(fmts
, fp
->format
)) {
1510 hwc_debug(" > check: no supported format %d\n", fp
->format
);
1513 /* check the channels */
1514 if (fp
->channels
< ct
->min
|| fp
->channels
> ct
->max
) {
1515 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp
->channels
, ct
->min
, ct
->max
);
1518 /* check the rate is within the range */
1519 if (fp
->rate_min
> it
->max
|| (fp
->rate_min
== it
->max
&& it
->openmax
)) {
1520 hwc_debug(" > check: rate_min %d > max %d\n", fp
->rate_min
, it
->max
);
1523 if (fp
->rate_max
< it
->min
|| (fp
->rate_max
== it
->min
&& it
->openmin
)) {
1524 hwc_debug(" > check: rate_max %d < min %d\n", fp
->rate_max
, it
->min
);
1530 static int hw_rule_rate(struct snd_pcm_hw_params
*params
,
1531 struct snd_pcm_hw_rule
*rule
)
1533 struct snd_usb_substream
*subs
= rule
->private;
1534 struct list_head
*p
;
1535 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1536 unsigned int rmin
, rmax
;
1539 hwc_debug("hw_rule_rate: (%d,%d)\n", it
->min
, it
->max
);
1542 list_for_each(p
, &subs
->fmt_list
) {
1543 struct audioformat
*fp
;
1544 fp
= list_entry(p
, struct audioformat
, list
);
1545 if (! hw_check_valid_format(params
, fp
))
1548 if (rmin
> fp
->rate_min
)
1549 rmin
= fp
->rate_min
;
1550 if (rmax
< fp
->rate_max
)
1551 rmax
= fp
->rate_max
;
1553 rmin
= fp
->rate_min
;
1554 rmax
= fp
->rate_max
;
1559 hwc_debug(" --> get empty\n");
1565 if (it
->min
< rmin
) {
1570 if (it
->max
> rmax
) {
1575 if (snd_interval_checkempty(it
)) {
1579 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1584 static int hw_rule_channels(struct snd_pcm_hw_params
*params
,
1585 struct snd_pcm_hw_rule
*rule
)
1587 struct snd_usb_substream
*subs
= rule
->private;
1588 struct list_head
*p
;
1589 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1590 unsigned int rmin
, rmax
;
1593 hwc_debug("hw_rule_channels: (%d,%d)\n", it
->min
, it
->max
);
1596 list_for_each(p
, &subs
->fmt_list
) {
1597 struct audioformat
*fp
;
1598 fp
= list_entry(p
, struct audioformat
, list
);
1599 if (! hw_check_valid_format(params
, fp
))
1602 if (rmin
> fp
->channels
)
1603 rmin
= fp
->channels
;
1604 if (rmax
< fp
->channels
)
1605 rmax
= fp
->channels
;
1607 rmin
= fp
->channels
;
1608 rmax
= fp
->channels
;
1613 hwc_debug(" --> get empty\n");
1619 if (it
->min
< rmin
) {
1624 if (it
->max
> rmax
) {
1629 if (snd_interval_checkempty(it
)) {
1633 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1637 static int hw_rule_format(struct snd_pcm_hw_params
*params
,
1638 struct snd_pcm_hw_rule
*rule
)
1640 struct snd_usb_substream
*subs
= rule
->private;
1641 struct list_head
*p
;
1642 struct snd_mask
*fmt
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1647 hwc_debug("hw_rule_format: %x:%x\n", fmt
->bits
[0], fmt
->bits
[1]);
1649 list_for_each(p
, &subs
->fmt_list
) {
1650 struct audioformat
*fp
;
1651 fp
= list_entry(p
, struct audioformat
, list
);
1652 if (! hw_check_valid_format(params
, fp
))
1654 fbits
|= (1ULL << fp
->format
);
1657 oldbits
[0] = fmt
->bits
[0];
1658 oldbits
[1] = fmt
->bits
[1];
1659 fmt
->bits
[0] &= (u32
)fbits
;
1660 fmt
->bits
[1] &= (u32
)(fbits
>> 32);
1661 if (! fmt
->bits
[0] && ! fmt
->bits
[1]) {
1662 hwc_debug(" --> get empty\n");
1665 changed
= (oldbits
[0] != fmt
->bits
[0] || oldbits
[1] != fmt
->bits
[1]);
1666 hwc_debug(" --> %x:%x (changed = %d)\n", fmt
->bits
[0], fmt
->bits
[1], changed
);
1673 * check whether the registered audio formats need special hw-constraints
1675 static int check_hw_params_convention(struct snd_usb_substream
*subs
)
1680 u32 cmaster
, rmaster
;
1681 u32 rate_min
= 0, rate_max
= 0;
1682 struct list_head
*p
;
1685 channels
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1686 rates
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1688 list_for_each(p
, &subs
->fmt_list
) {
1689 struct audioformat
*f
;
1690 f
= list_entry(p
, struct audioformat
, list
);
1691 /* unconventional channels? */
1692 if (f
->channels
> 32)
1694 /* continuous rate min/max matches? */
1695 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1696 if (rate_min
&& f
->rate_min
!= rate_min
)
1698 if (rate_max
&& f
->rate_max
!= rate_max
)
1700 rate_min
= f
->rate_min
;
1701 rate_max
= f
->rate_max
;
1703 /* combination of continuous rates and fixed rates? */
1704 if (rates
[f
->format
] & SNDRV_PCM_RATE_CONTINUOUS
) {
1705 if (f
->rates
!= rates
[f
->format
])
1708 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1709 if (rates
[f
->format
] && rates
[f
->format
] != f
->rates
)
1712 channels
[f
->format
] |= (1 << f
->channels
);
1713 rates
[f
->format
] |= f
->rates
;
1715 /* check whether channels and rates match for all formats */
1716 cmaster
= rmaster
= 0;
1717 for (i
= 0; i
< MAX_MASK
; i
++) {
1718 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1720 if (rmaster
!= rates
[i
] && rmaster
&& rates
[i
])
1723 cmaster
= channels
[i
];
1727 /* check whether channels match for all distinct rates */
1728 memset(channels
, 0, MAX_MASK
* sizeof(u32
));
1729 list_for_each(p
, &subs
->fmt_list
) {
1730 struct audioformat
*f
;
1731 f
= list_entry(p
, struct audioformat
, list
);
1732 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)
1734 for (i
= 0; i
< 32; i
++) {
1735 if (f
->rates
& (1 << i
))
1736 channels
[i
] |= (1 << f
->channels
);
1740 for (i
= 0; i
< 32; i
++) {
1741 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1744 cmaster
= channels
[i
];
1756 * set up the runtime hardware information.
1759 static int setup_hw_info(struct snd_pcm_runtime
*runtime
, struct snd_usb_substream
*subs
)
1761 struct list_head
*p
;
1764 runtime
->hw
.formats
= subs
->formats
;
1766 runtime
->hw
.rate_min
= 0x7fffffff;
1767 runtime
->hw
.rate_max
= 0;
1768 runtime
->hw
.channels_min
= 256;
1769 runtime
->hw
.channels_max
= 0;
1770 runtime
->hw
.rates
= 0;
1771 /* check min/max rates and channels */
1772 list_for_each(p
, &subs
->fmt_list
) {
1773 struct audioformat
*fp
;
1774 fp
= list_entry(p
, struct audioformat
, list
);
1775 runtime
->hw
.rates
|= fp
->rates
;
1776 if (runtime
->hw
.rate_min
> fp
->rate_min
)
1777 runtime
->hw
.rate_min
= fp
->rate_min
;
1778 if (runtime
->hw
.rate_max
< fp
->rate_max
)
1779 runtime
->hw
.rate_max
= fp
->rate_max
;
1780 if (runtime
->hw
.channels_min
> fp
->channels
)
1781 runtime
->hw
.channels_min
= fp
->channels
;
1782 if (runtime
->hw
.channels_max
< fp
->channels
)
1783 runtime
->hw
.channels_max
= fp
->channels
;
1784 if (fp
->fmt_type
== USB_FORMAT_TYPE_II
&& fp
->frame_size
> 0) {
1785 /* FIXME: there might be more than one audio formats... */
1786 runtime
->hw
.period_bytes_min
= runtime
->hw
.period_bytes_max
=
1791 /* set the period time minimum 1ms */
1792 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1793 1000 * MIN_PACKS_URB
,
1794 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX
);
1796 if (check_hw_params_convention(subs
)) {
1797 hwc_debug("setting extra hw constraints...\n");
1798 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1800 SNDRV_PCM_HW_PARAM_FORMAT
,
1801 SNDRV_PCM_HW_PARAM_CHANNELS
,
1804 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1805 hw_rule_channels
, subs
,
1806 SNDRV_PCM_HW_PARAM_FORMAT
,
1807 SNDRV_PCM_HW_PARAM_RATE
,
1810 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1811 hw_rule_format
, subs
,
1812 SNDRV_PCM_HW_PARAM_RATE
,
1813 SNDRV_PCM_HW_PARAM_CHANNELS
,
1820 static int snd_usb_pcm_open(struct snd_pcm_substream
*substream
, int direction
,
1821 struct snd_pcm_hardware
*hw
)
1823 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
1824 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1825 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
1827 subs
->interface
= -1;
1830 runtime
->private_data
= subs
;
1831 subs
->pcm_substream
= substream
;
1832 return setup_hw_info(runtime
, subs
);
1835 static int snd_usb_pcm_close(struct snd_pcm_substream
*substream
, int direction
)
1837 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
1838 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
1840 if (subs
->interface
>= 0) {
1841 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1842 subs
->interface
= -1;
1844 subs
->pcm_substream
= NULL
;
1848 static int snd_usb_playback_open(struct snd_pcm_substream
*substream
)
1850 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_PLAYBACK
, &snd_usb_playback
);
1853 static int snd_usb_playback_close(struct snd_pcm_substream
*substream
)
1855 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
1858 static int snd_usb_capture_open(struct snd_pcm_substream
*substream
)
1860 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_CAPTURE
, &snd_usb_capture
);
1863 static int snd_usb_capture_close(struct snd_pcm_substream
*substream
)
1865 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_CAPTURE
);
1868 static struct snd_pcm_ops snd_usb_playback_ops
= {
1869 .open
= snd_usb_playback_open
,
1870 .close
= snd_usb_playback_close
,
1871 .ioctl
= snd_pcm_lib_ioctl
,
1872 .hw_params
= snd_usb_hw_params
,
1873 .hw_free
= snd_usb_hw_free
,
1874 .prepare
= snd_usb_pcm_prepare
,
1875 .trigger
= snd_usb_pcm_playback_trigger
,
1876 .pointer
= snd_usb_pcm_pointer
,
1877 .page
= snd_pcm_get_vmalloc_page
,
1880 static struct snd_pcm_ops snd_usb_capture_ops
= {
1881 .open
= snd_usb_capture_open
,
1882 .close
= snd_usb_capture_close
,
1883 .ioctl
= snd_pcm_lib_ioctl
,
1884 .hw_params
= snd_usb_hw_params
,
1885 .hw_free
= snd_usb_hw_free
,
1886 .prepare
= snd_usb_pcm_prepare
,
1887 .trigger
= snd_usb_pcm_capture_trigger
,
1888 .pointer
= snd_usb_pcm_pointer
,
1889 .page
= snd_pcm_get_vmalloc_page
,
1899 * combine bytes and get an integer value
1901 unsigned int snd_usb_combine_bytes(unsigned char *bytes
, int size
)
1904 case 1: return *bytes
;
1905 case 2: return combine_word(bytes
);
1906 case 3: return combine_triple(bytes
);
1907 case 4: return combine_quad(bytes
);
1913 * parse descriptor buffer and return the pointer starting the given
1916 void *snd_usb_find_desc(void *descstart
, int desclen
, void *after
, u8 dtype
)
1928 if (p
[1] == dtype
&& (!after
|| (void *)p
> after
)) {
1937 * find a class-specified interface descriptor with the given subtype.
1939 void *snd_usb_find_csint_desc(void *buffer
, int buflen
, void *after
, u8 dsubtype
)
1941 unsigned char *p
= after
;
1943 while ((p
= snd_usb_find_desc(buffer
, buflen
, p
,
1944 USB_DT_CS_INTERFACE
)) != NULL
) {
1945 if (p
[0] >= 3 && p
[2] == dsubtype
)
1952 * Wrapper for usb_control_msg().
1953 * Allocates a temp buffer to prevent dmaing from/to the stack.
1955 int snd_usb_ctl_msg(struct usb_device
*dev
, unsigned int pipe
, __u8 request
,
1956 __u8 requesttype
, __u16 value
, __u16 index
, void *data
,
1957 __u16 size
, int timeout
)
1963 buf
= kmalloc(size
, GFP_KERNEL
);
1966 memcpy(buf
, data
, size
);
1968 err
= usb_control_msg(dev
, pipe
, request
, requesttype
,
1969 value
, index
, buf
, size
, timeout
);
1971 memcpy(data
, buf
, size
);
1979 * entry point for linux usb interface
1982 static int usb_audio_probe(struct usb_interface
*intf
,
1983 const struct usb_device_id
*id
);
1984 static void usb_audio_disconnect(struct usb_interface
*intf
);
1986 static struct usb_device_id usb_audio_ids
[] = {
1987 #include "usbquirks.h"
1988 { .match_flags
= (USB_DEVICE_ID_MATCH_INT_CLASS
| USB_DEVICE_ID_MATCH_INT_SUBCLASS
),
1989 .bInterfaceClass
= USB_CLASS_AUDIO
,
1990 .bInterfaceSubClass
= USB_SUBCLASS_AUDIO_CONTROL
},
1991 { } /* Terminating entry */
1994 MODULE_DEVICE_TABLE (usb
, usb_audio_ids
);
1996 static struct usb_driver usb_audio_driver
= {
1997 .owner
= THIS_MODULE
,
1998 .name
= "snd-usb-audio",
1999 .probe
= usb_audio_probe
,
2000 .disconnect
= usb_audio_disconnect
,
2001 .id_table
= usb_audio_ids
,
2006 * proc interface for list the supported pcm formats
2008 static void proc_dump_substream_formats(struct snd_usb_substream
*subs
, struct snd_info_buffer
*buffer
)
2010 struct list_head
*p
;
2011 static char *sync_types
[4] = {
2012 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2015 list_for_each(p
, &subs
->fmt_list
) {
2016 struct audioformat
*fp
;
2017 fp
= list_entry(p
, struct audioformat
, list
);
2018 snd_iprintf(buffer
, " Interface %d\n", fp
->iface
);
2019 snd_iprintf(buffer
, " Altset %d\n", fp
->altsetting
);
2020 snd_iprintf(buffer
, " Format: %s\n", snd_pcm_format_name(fp
->format
));
2021 snd_iprintf(buffer
, " Channels: %d\n", fp
->channels
);
2022 snd_iprintf(buffer
, " Endpoint: %d %s (%s)\n",
2023 fp
->endpoint
& USB_ENDPOINT_NUMBER_MASK
,
2024 fp
->endpoint
& USB_DIR_IN
? "IN" : "OUT",
2025 sync_types
[(fp
->ep_attr
& EP_ATTR_MASK
) >> 2]);
2026 if (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
2027 snd_iprintf(buffer
, " Rates: %d - %d (continuous)\n",
2028 fp
->rate_min
, fp
->rate_max
);
2031 snd_iprintf(buffer
, " Rates: ");
2032 for (i
= 0; i
< fp
->nr_rates
; i
++) {
2034 snd_iprintf(buffer
, ", ");
2035 snd_iprintf(buffer
, "%d", fp
->rate_table
[i
]);
2037 snd_iprintf(buffer
, "\n");
2039 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2040 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2044 static void proc_dump_substream_status(struct snd_usb_substream
*subs
, struct snd_info_buffer
*buffer
)
2046 if (subs
->running
) {
2048 snd_iprintf(buffer
, " Status: Running\n");
2049 snd_iprintf(buffer
, " Interface = %d\n", subs
->interface
);
2050 snd_iprintf(buffer
, " Altset = %d\n", subs
->format
);
2051 snd_iprintf(buffer
, " URBs = %d [ ", subs
->nurbs
);
2052 for (i
= 0; i
< subs
->nurbs
; i
++)
2053 snd_iprintf(buffer
, "%d ", subs
->dataurb
[i
].packets
);
2054 snd_iprintf(buffer
, "]\n");
2055 snd_iprintf(buffer
, " Packet Size = %d\n", subs
->curpacksize
);
2056 snd_iprintf(buffer
, " Momentary freq = %u Hz (%#x.%04x)\n",
2057 snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
2058 ? get_full_speed_hz(subs
->freqm
)
2059 : get_high_speed_hz(subs
->freqm
),
2060 subs
->freqm
>> 16, subs
->freqm
& 0xffff);
2062 snd_iprintf(buffer
, " Status: Stop\n");
2066 static void proc_pcm_format_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
2068 struct snd_usb_stream
*stream
= entry
->private_data
;
2070 snd_iprintf(buffer
, "%s : %s\n", stream
->chip
->card
->longname
, stream
->pcm
->name
);
2072 if (stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
].num_formats
) {
2073 snd_iprintf(buffer
, "\nPlayback:\n");
2074 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2075 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2077 if (stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
].num_formats
) {
2078 snd_iprintf(buffer
, "\nCapture:\n");
2079 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2080 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2084 static void proc_pcm_format_add(struct snd_usb_stream
*stream
)
2086 struct snd_info_entry
*entry
;
2088 struct snd_card
*card
= stream
->chip
->card
;
2090 sprintf(name
, "stream%d", stream
->pcm_index
);
2091 if (! snd_card_proc_new(card
, name
, &entry
))
2092 snd_info_set_text_ops(entry
, stream
, 1024, proc_pcm_format_read
);
2097 * initialize the substream instance.
2100 static void init_substream(struct snd_usb_stream
*as
, int stream
, struct audioformat
*fp
)
2102 struct snd_usb_substream
*subs
= &as
->substream
[stream
];
2104 INIT_LIST_HEAD(&subs
->fmt_list
);
2105 spin_lock_init(&subs
->lock
);
2108 subs
->direction
= stream
;
2109 subs
->dev
= as
->chip
->dev
;
2110 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
2111 subs
->ops
= audio_urb_ops
[stream
];
2113 subs
->ops
= audio_urb_ops_high_speed
[stream
];
2114 snd_pcm_set_ops(as
->pcm
, stream
,
2115 stream
== SNDRV_PCM_STREAM_PLAYBACK
?
2116 &snd_usb_playback_ops
: &snd_usb_capture_ops
);
2118 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2119 subs
->formats
|= 1ULL << fp
->format
;
2120 subs
->endpoint
= fp
->endpoint
;
2121 subs
->num_formats
++;
2122 subs
->fmt_type
= fp
->fmt_type
;
2129 static void free_substream(struct snd_usb_substream
*subs
)
2131 struct list_head
*p
, *n
;
2133 if (! subs
->num_formats
)
2134 return; /* not initialized */
2135 list_for_each_safe(p
, n
, &subs
->fmt_list
) {
2136 struct audioformat
*fp
= list_entry(p
, struct audioformat
, list
);
2137 kfree(fp
->rate_table
);
2144 * free a usb stream instance
2146 static void snd_usb_audio_stream_free(struct snd_usb_stream
*stream
)
2148 free_substream(&stream
->substream
[0]);
2149 free_substream(&stream
->substream
[1]);
2150 list_del(&stream
->list
);
2154 static void snd_usb_audio_pcm_free(struct snd_pcm
*pcm
)
2156 struct snd_usb_stream
*stream
= pcm
->private_data
;
2159 snd_usb_audio_stream_free(stream
);
2165 * add this endpoint to the chip instance.
2166 * if a stream with the same endpoint already exists, append to it.
2167 * if not, create a new pcm stream.
2169 static int add_audio_endpoint(struct snd_usb_audio
*chip
, int stream
, struct audioformat
*fp
)
2171 struct list_head
*p
;
2172 struct snd_usb_stream
*as
;
2173 struct snd_usb_substream
*subs
;
2174 struct snd_pcm
*pcm
;
2177 list_for_each(p
, &chip
->pcm_list
) {
2178 as
= list_entry(p
, struct snd_usb_stream
, list
);
2179 if (as
->fmt_type
!= fp
->fmt_type
)
2181 subs
= &as
->substream
[stream
];
2182 if (! subs
->endpoint
)
2184 if (subs
->endpoint
== fp
->endpoint
) {
2185 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2186 subs
->num_formats
++;
2187 subs
->formats
|= 1ULL << fp
->format
;
2191 /* look for an empty stream */
2192 list_for_each(p
, &chip
->pcm_list
) {
2193 as
= list_entry(p
, struct snd_usb_stream
, list
);
2194 if (as
->fmt_type
!= fp
->fmt_type
)
2196 subs
= &as
->substream
[stream
];
2199 err
= snd_pcm_new_stream(as
->pcm
, stream
, 1);
2202 init_substream(as
, stream
, fp
);
2206 /* create a new pcm */
2207 as
= kmalloc(sizeof(*as
), GFP_KERNEL
);
2210 memset(as
, 0, sizeof(*as
));
2211 as
->pcm_index
= chip
->pcm_devs
;
2213 as
->fmt_type
= fp
->fmt_type
;
2214 err
= snd_pcm_new(chip
->card
, "USB Audio", chip
->pcm_devs
,
2215 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 1 : 0,
2216 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 0 : 1,
2223 pcm
->private_data
= as
;
2224 pcm
->private_free
= snd_usb_audio_pcm_free
;
2225 pcm
->info_flags
= 0;
2226 if (chip
->pcm_devs
> 0)
2227 sprintf(pcm
->name
, "USB Audio #%d", chip
->pcm_devs
);
2229 strcpy(pcm
->name
, "USB Audio");
2231 init_substream(as
, stream
, fp
);
2233 list_add(&as
->list
, &chip
->pcm_list
);
2236 proc_pcm_format_add(as
);
2243 * check if the device uses big-endian samples
2245 static int is_big_endian_format(struct snd_usb_audio
*chip
, struct audioformat
*fp
)
2247 switch (chip
->usb_id
) {
2248 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2249 if (fp
->endpoint
& USB_DIR_IN
)
2252 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2259 * parse the audio format type I descriptor
2260 * and returns the corresponding pcm format
2263 * @fp: audioformat record
2264 * @format: the format tag (wFormatTag)
2265 * @fmt: the format type descriptor
2267 static int parse_audio_format_i_type(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2268 int format
, unsigned char *fmt
)
2271 int sample_width
, sample_bytes
;
2273 /* FIXME: correct endianess and sign? */
2275 sample_width
= fmt
[6];
2276 sample_bytes
= fmt
[5];
2278 case 0: /* some devices don't define this correctly... */
2279 snd_printdd(KERN_INFO
"%d:%u:%d : format type 0 is detected, processed as PCM\n",
2280 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2282 case USB_AUDIO_FORMAT_PCM
:
2283 if (sample_width
> sample_bytes
* 8) {
2284 snd_printk(KERN_INFO
"%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2285 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
,
2286 sample_width
, sample_bytes
);
2288 /* check the format byte size */
2291 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2294 if (is_big_endian_format(chip
, fp
))
2295 pcm_format
= SNDRV_PCM_FORMAT_S16_BE
; /* grrr, big endian!! */
2297 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2300 if (is_big_endian_format(chip
, fp
))
2301 pcm_format
= SNDRV_PCM_FORMAT_S24_3BE
; /* grrr, big endian!! */
2303 pcm_format
= SNDRV_PCM_FORMAT_S24_3LE
;
2306 pcm_format
= SNDRV_PCM_FORMAT_S32_LE
;
2309 snd_printk(KERN_INFO
"%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2310 chip
->dev
->devnum
, fp
->iface
,
2311 fp
->altsetting
, sample_width
, sample_bytes
);
2315 case USB_AUDIO_FORMAT_PCM8
:
2316 /* Dallas DS4201 workaround */
2317 if (chip
->usb_id
== USB_ID(0x04fa, 0x4201))
2318 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2320 pcm_format
= SNDRV_PCM_FORMAT_U8
;
2322 case USB_AUDIO_FORMAT_IEEE_FLOAT
:
2323 pcm_format
= SNDRV_PCM_FORMAT_FLOAT_LE
;
2325 case USB_AUDIO_FORMAT_ALAW
:
2326 pcm_format
= SNDRV_PCM_FORMAT_A_LAW
;
2328 case USB_AUDIO_FORMAT_MU_LAW
:
2329 pcm_format
= SNDRV_PCM_FORMAT_MU_LAW
;
2332 snd_printk(KERN_INFO
"%d:%u:%d : unsupported format type %d\n",
2333 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2341 * parse the format descriptor and stores the possible sample rates
2342 * on the audioformat table.
2345 * @fp: audioformat record
2346 * @fmt: the format descriptor
2347 * @offset: the start offset of descriptor pointing the rate type
2348 * (7 for type I and II, 8 for type II)
2350 static int parse_audio_format_rates(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2351 unsigned char *fmt
, int offset
)
2353 int nr_rates
= fmt
[offset
];
2354 if (fmt
[0] < offset
+ 1 + 3 * (nr_rates
? nr_rates
: 2)) {
2355 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2356 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2362 * build the rate table and bitmap flags
2365 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2366 static unsigned int conv_rates
[] = {
2367 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2368 64000, 88200, 96000, 176400, 192000
2370 fp
->rate_table
= kmalloc(sizeof(int) * nr_rates
, GFP_KERNEL
);
2371 if (fp
->rate_table
== NULL
) {
2372 snd_printk(KERN_ERR
"cannot malloc\n");
2376 fp
->nr_rates
= nr_rates
;
2377 fp
->rate_min
= fp
->rate_max
= combine_triple(&fmt
[8]);
2378 for (r
= 0, idx
= offset
+ 1; r
< nr_rates
; r
++, idx
+= 3) {
2379 unsigned int rate
= fp
->rate_table
[r
] = combine_triple(&fmt
[idx
]);
2380 if (rate
< fp
->rate_min
)
2381 fp
->rate_min
= rate
;
2382 else if (rate
> fp
->rate_max
)
2383 fp
->rate_max
= rate
;
2384 for (c
= 0; c
< (int)ARRAY_SIZE(conv_rates
); c
++) {
2385 if (rate
== conv_rates
[c
]) {
2386 fp
->rates
|= (1 << c
);
2392 /* continuous rates */
2393 fp
->rates
= SNDRV_PCM_RATE_CONTINUOUS
;
2394 fp
->rate_min
= combine_triple(&fmt
[offset
+ 1]);
2395 fp
->rate_max
= combine_triple(&fmt
[offset
+ 4]);
2401 * parse the format type I and III descriptors
2403 static int parse_audio_format_i(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2404 int format
, unsigned char *fmt
)
2408 if (fmt
[3] == USB_FORMAT_TYPE_III
) {
2409 /* FIXME: the format type is really IECxxx
2410 * but we give normal PCM format to get the existing
2413 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2415 pcm_format
= parse_audio_format_i_type(chip
, fp
, format
, fmt
);
2419 fp
->format
= pcm_format
;
2420 fp
->channels
= fmt
[4];
2421 if (fp
->channels
< 1) {
2422 snd_printk(KERN_ERR
"%d:%u:%d : invalid channels %d\n",
2423 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fp
->channels
);
2426 return parse_audio_format_rates(chip
, fp
, fmt
, 7);
2430 * prase the format type II descriptor
2432 static int parse_audio_format_ii(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2433 int format
, unsigned char *fmt
)
2435 int brate
, framesize
;
2437 case USB_AUDIO_FORMAT_AC3
:
2438 /* FIXME: there is no AC3 format defined yet */
2439 // fp->format = SNDRV_PCM_FORMAT_AC3;
2440 fp
->format
= SNDRV_PCM_FORMAT_U8
; /* temporarily hack to receive byte streams */
2442 case USB_AUDIO_FORMAT_MPEG
:
2443 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2446 snd_printd(KERN_INFO
"%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
2447 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2448 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2452 brate
= combine_word(&fmt
[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2453 framesize
= combine_word(&fmt
[6]); /* fmt[6,7]: wSamplesPerFrame */
2454 snd_printd(KERN_INFO
"found format II with max.bitrate = %d, frame size=%d\n", brate
, framesize
);
2455 fp
->frame_size
= framesize
;
2456 return parse_audio_format_rates(chip
, fp
, fmt
, 8); /* fmt[8..] sample rates */
2459 static int parse_audio_format(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2460 int format
, unsigned char *fmt
, int stream
)
2465 case USB_FORMAT_TYPE_I
:
2466 case USB_FORMAT_TYPE_III
:
2467 err
= parse_audio_format_i(chip
, fp
, format
, fmt
);
2469 case USB_FORMAT_TYPE_II
:
2470 err
= parse_audio_format_ii(chip
, fp
, format
, fmt
);
2473 snd_printd(KERN_INFO
"%d:%u:%d : format type %d is not supported yet\n",
2474 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fmt
[3]);
2477 fp
->fmt_type
= fmt
[3];
2481 /* FIXME: temporary hack for extigy/audigy 2 nx */
2482 /* extigy apparently supports sample rates other than 48k
2483 * but not in ordinary way. so we enable only 48k atm.
2485 if (chip
->usb_id
== USB_ID(0x041e, 0x3000) ||
2486 chip
->usb_id
== USB_ID(0x041e, 0x3020)) {
2487 if (fmt
[3] == USB_FORMAT_TYPE_I
&&
2488 fp
->rates
!= SNDRV_PCM_RATE_48000
&&
2489 fp
->rates
!= SNDRV_PCM_RATE_96000
)
2496 static int parse_audio_endpoints(struct snd_usb_audio
*chip
, int iface_no
)
2498 struct usb_device
*dev
;
2499 struct usb_interface
*iface
;
2500 struct usb_host_interface
*alts
;
2501 struct usb_interface_descriptor
*altsd
;
2502 int i
, altno
, err
, stream
;
2504 struct audioformat
*fp
;
2505 unsigned char *fmt
, *csep
;
2509 /* parse the interface's altsettings */
2510 iface
= usb_ifnum_to_if(dev
, iface_no
);
2511 for (i
= 0; i
< iface
->num_altsetting
; i
++) {
2512 alts
= &iface
->altsetting
[i
];
2513 altsd
= get_iface_desc(alts
);
2514 /* skip invalid one */
2515 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2516 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2517 (altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
&&
2518 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_VENDOR_SPEC
) ||
2519 altsd
->bNumEndpoints
< 1 ||
2520 le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
) == 0)
2522 /* must be isochronous */
2523 if ((get_endpoint(alts
, 0)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) !=
2524 USB_ENDPOINT_XFER_ISOC
)
2526 /* check direction */
2527 stream
= (get_endpoint(alts
, 0)->bEndpointAddress
& USB_DIR_IN
) ?
2528 SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2529 altno
= altsd
->bAlternateSetting
;
2531 /* get audio formats */
2532 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, AS_GENERAL
);
2534 snd_printk(KERN_ERR
"%d:%u:%d : AS_GENERAL descriptor not found\n",
2535 dev
->devnum
, iface_no
, altno
);
2540 snd_printk(KERN_ERR
"%d:%u:%d : invalid AS_GENERAL desc\n",
2541 dev
->devnum
, iface_no
, altno
);
2545 format
= (fmt
[6] << 8) | fmt
[5]; /* remember the format value */
2547 /* get format type */
2548 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, FORMAT_TYPE
);
2550 snd_printk(KERN_ERR
"%d:%u:%d : no FORMAT_TYPE desc\n",
2551 dev
->devnum
, iface_no
, altno
);
2555 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2556 dev
->devnum
, iface_no
, altno
);
2560 csep
= snd_usb_find_desc(alts
->endpoint
[0].extra
, alts
->endpoint
[0].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2561 /* Creamware Noah has this descriptor after the 2nd endpoint */
2562 if (!csep
&& altsd
->bNumEndpoints
>= 2)
2563 csep
= snd_usb_find_desc(alts
->endpoint
[1].extra
, alts
->endpoint
[1].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2564 if (!csep
|| csep
[0] < 7 || csep
[2] != EP_GENERAL
) {
2565 snd_printk(KERN_ERR
"%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2566 dev
->devnum
, iface_no
, altno
);
2570 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2572 snd_printk(KERN_ERR
"cannot malloc\n");
2576 memset(fp
, 0, sizeof(*fp
));
2577 fp
->iface
= iface_no
;
2578 fp
->altsetting
= altno
;
2580 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2581 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2582 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2583 if (snd_usb_get_speed(dev
) == USB_SPEED_HIGH
)
2584 fp
->maxpacksize
= (((fp
->maxpacksize
>> 11) & 3) + 1)
2585 * (fp
->maxpacksize
& 0x7ff);
2586 fp
->attributes
= csep
[3];
2588 /* some quirks for attributes here */
2590 switch (chip
->usb_id
) {
2591 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2592 /* Optoplay sets the sample rate attribute although
2593 * it seems not supporting it in fact.
2595 fp
->attributes
&= ~EP_CS_ATTR_SAMPLE_RATE
;
2597 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2598 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2599 /* doesn't set the sample rate attribute, but supports it */
2600 fp
->attributes
|= EP_CS_ATTR_SAMPLE_RATE
;
2602 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2603 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2604 an older model 77d:223) */
2606 * plantronics headset and Griffin iMic have set adaptive-in
2607 * although it's really not...
2609 fp
->ep_attr
&= ~EP_ATTR_MASK
;
2610 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2611 fp
->ep_attr
|= EP_ATTR_ADAPTIVE
;
2613 fp
->ep_attr
|= EP_ATTR_SYNC
;
2617 /* ok, let's parse further... */
2618 if (parse_audio_format(chip
, fp
, format
, fmt
, stream
) < 0) {
2619 kfree(fp
->rate_table
);
2624 snd_printdd(KERN_INFO
"%d:%u:%d: add audio endpoint 0x%x\n", dev
->devnum
, iface_no
, i
, fp
->endpoint
);
2625 err
= add_audio_endpoint(chip
, stream
, fp
);
2627 kfree(fp
->rate_table
);
2631 /* try to set the interface... */
2632 usb_set_interface(chip
->dev
, iface_no
, altno
);
2633 init_usb_pitch(chip
->dev
, iface_no
, alts
, fp
);
2634 init_usb_sample_rate(chip
->dev
, iface_no
, alts
, fp
, fp
->rate_max
);
2641 * disconnect streams
2642 * called from snd_usb_audio_disconnect()
2644 static void snd_usb_stream_disconnect(struct list_head
*head
)
2647 struct snd_usb_stream
*as
;
2648 struct snd_usb_substream
*subs
;
2650 as
= list_entry(head
, struct snd_usb_stream
, list
);
2651 for (idx
= 0; idx
< 2; idx
++) {
2652 subs
= &as
->substream
[idx
];
2653 if (!subs
->num_formats
)
2655 release_substream_urbs(subs
, 1);
2656 subs
->interface
= -1;
2661 * parse audio control descriptor and create pcm/midi streams
2663 static int snd_usb_create_streams(struct snd_usb_audio
*chip
, int ctrlif
)
2665 struct usb_device
*dev
= chip
->dev
;
2666 struct usb_host_interface
*host_iface
;
2667 struct usb_interface
*iface
;
2671 /* find audiocontrol interface */
2672 host_iface
= &usb_ifnum_to_if(dev
, ctrlif
)->altsetting
[0];
2673 if (!(p1
= snd_usb_find_csint_desc(host_iface
->extra
, host_iface
->extralen
, NULL
, HEADER
))) {
2674 snd_printk(KERN_ERR
"cannot find HEADER\n");
2677 if (! p1
[7] || p1
[0] < 8 + p1
[7]) {
2678 snd_printk(KERN_ERR
"invalid HEADER\n");
2683 * parse all USB audio streaming interfaces
2685 for (i
= 0; i
< p1
[7]; i
++) {
2686 struct usb_host_interface
*alts
;
2687 struct usb_interface_descriptor
*altsd
;
2689 iface
= usb_ifnum_to_if(dev
, j
);
2691 snd_printk(KERN_ERR
"%d:%u:%d : does not exist\n",
2692 dev
->devnum
, ctrlif
, j
);
2695 if (usb_interface_claimed(iface
)) {
2696 snd_printdd(KERN_INFO
"%d:%d:%d: skipping, already claimed\n", dev
->devnum
, ctrlif
, j
);
2699 alts
= &iface
->altsetting
[0];
2700 altsd
= get_iface_desc(alts
);
2701 if ((altsd
->bInterfaceClass
== USB_CLASS_AUDIO
||
2702 altsd
->bInterfaceClass
== USB_CLASS_VENDOR_SPEC
) &&
2703 altsd
->bInterfaceSubClass
== USB_SUBCLASS_MIDI_STREAMING
) {
2704 if (snd_usb_create_midi_interface(chip
, iface
, NULL
) < 0) {
2705 snd_printk(KERN_ERR
"%d:%u:%d: cannot create sequencer device\n", dev
->devnum
, ctrlif
, j
);
2708 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2711 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2712 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2713 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
) {
2714 snd_printdd(KERN_ERR
"%d:%u:%d: skipping non-supported interface %d\n", dev
->devnum
, ctrlif
, j
, altsd
->bInterfaceClass
);
2715 /* skip non-supported classes */
2718 if (! parse_audio_endpoints(chip
, j
)) {
2719 usb_set_interface(dev
, j
, 0); /* reset the current interface */
2720 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2728 * create a stream for an endpoint/altsetting without proper descriptors
2730 static int create_fixed_stream_quirk(struct snd_usb_audio
*chip
,
2731 struct usb_interface
*iface
,
2732 const struct snd_usb_audio_quirk
*quirk
)
2734 struct audioformat
*fp
;
2735 struct usb_host_interface
*alts
;
2737 int *rate_table
= NULL
;
2739 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2741 snd_printk(KERN_ERR
"cannot malloc\n");
2744 memcpy(fp
, quirk
->data
, sizeof(*fp
));
2745 if (fp
->nr_rates
> 0) {
2746 rate_table
= kmalloc(sizeof(int) * fp
->nr_rates
, GFP_KERNEL
);
2751 memcpy(rate_table
, fp
->rate_table
, sizeof(int) * fp
->nr_rates
);
2752 fp
->rate_table
= rate_table
;
2755 stream
= (fp
->endpoint
& USB_DIR_IN
)
2756 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2757 err
= add_audio_endpoint(chip
, stream
, fp
);
2763 if (fp
->iface
!= get_iface_desc(&iface
->altsetting
[0])->bInterfaceNumber
||
2764 fp
->altset_idx
>= iface
->num_altsetting
) {
2769 alts
= &iface
->altsetting
[fp
->altset_idx
];
2770 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2771 init_usb_pitch(chip
->dev
, fp
->iface
, alts
, fp
);
2772 init_usb_sample_rate(chip
->dev
, fp
->iface
, alts
, fp
, fp
->rate_max
);
2777 * create a stream for an interface with proper descriptors
2779 static int create_standard_audio_quirk(struct snd_usb_audio
*chip
,
2780 struct usb_interface
*iface
,
2781 const struct snd_usb_audio_quirk
*quirk
)
2783 struct usb_host_interface
*alts
;
2784 struct usb_interface_descriptor
*altsd
;
2787 alts
= &iface
->altsetting
[0];
2788 altsd
= get_iface_desc(alts
);
2789 err
= parse_audio_endpoints(chip
, altsd
->bInterfaceNumber
);
2791 snd_printk(KERN_ERR
"cannot setup if %d: error %d\n",
2792 altsd
->bInterfaceNumber
, err
);
2795 /* reset the current interface */
2796 usb_set_interface(chip
->dev
, altsd
->bInterfaceNumber
, 0);
2801 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2802 * to detect the sample rate is by looking at wMaxPacketSize.
2804 static int create_ua700_ua25_quirk(struct snd_usb_audio
*chip
,
2805 struct usb_interface
*iface
,
2806 const struct snd_usb_audio_quirk
*quirk
)
2808 static const struct audioformat ua_format
= {
2809 .format
= SNDRV_PCM_FORMAT_S24_3LE
,
2811 .fmt_type
= USB_FORMAT_TYPE_I
,
2814 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2816 struct usb_host_interface
*alts
;
2817 struct usb_interface_descriptor
*altsd
;
2818 struct audioformat
*fp
;
2821 /* both PCM and MIDI interfaces have 2 altsettings */
2822 if (iface
->num_altsetting
!= 2)
2824 alts
= &iface
->altsetting
[1];
2825 altsd
= get_iface_desc(alts
);
2827 if (altsd
->bNumEndpoints
== 2) {
2828 static const struct snd_usb_midi_endpoint_info ua700_ep
= {
2829 .out_cables
= 0x0003,
2832 static const struct snd_usb_audio_quirk ua700_quirk
= {
2833 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2836 static const struct snd_usb_midi_endpoint_info ua25_ep
= {
2837 .out_cables
= 0x0001,
2840 static const struct snd_usb_audio_quirk ua25_quirk
= {
2841 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2844 if (chip
->usb_id
== USB_ID(0x0582, 0x002b))
2845 return snd_usb_create_midi_interface(chip
, iface
,
2848 return snd_usb_create_midi_interface(chip
, iface
,
2852 if (altsd
->bNumEndpoints
!= 1)
2855 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2858 memcpy(fp
, &ua_format
, sizeof(*fp
));
2860 fp
->iface
= altsd
->bInterfaceNumber
;
2861 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2862 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2863 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2865 switch (fp
->maxpacksize
) {
2867 fp
->rate_max
= fp
->rate_min
= 44100;
2871 fp
->rate_max
= fp
->rate_min
= 48000;
2875 fp
->rate_max
= fp
->rate_min
= 96000;
2878 snd_printk(KERN_ERR
"unknown sample rate\n");
2883 stream
= (fp
->endpoint
& USB_DIR_IN
)
2884 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2885 err
= add_audio_endpoint(chip
, stream
, fp
);
2890 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2895 * Create a stream for an Edirol UA-1000 interface.
2897 static int create_ua1000_quirk(struct snd_usb_audio
*chip
,
2898 struct usb_interface
*iface
,
2899 const struct snd_usb_audio_quirk
*quirk
)
2901 static const struct audioformat ua1000_format
= {
2902 .format
= SNDRV_PCM_FORMAT_S32_LE
,
2903 .fmt_type
= USB_FORMAT_TYPE_I
,
2907 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2909 struct usb_host_interface
*alts
;
2910 struct usb_interface_descriptor
*altsd
;
2911 struct audioformat
*fp
;
2914 if (iface
->num_altsetting
!= 2)
2916 alts
= &iface
->altsetting
[1];
2917 altsd
= get_iface_desc(alts
);
2918 if (alts
->extralen
!= 11 || alts
->extra
[1] != CS_AUDIO_INTERFACE
||
2919 altsd
->bNumEndpoints
!= 1)
2922 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2925 memcpy(fp
, &ua1000_format
, sizeof(*fp
));
2927 fp
->channels
= alts
->extra
[4];
2928 fp
->iface
= altsd
->bInterfaceNumber
;
2929 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2930 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2931 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2932 fp
->rate_max
= fp
->rate_min
= combine_triple(&alts
->extra
[8]);
2934 stream
= (fp
->endpoint
& USB_DIR_IN
)
2935 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2936 err
= add_audio_endpoint(chip
, stream
, fp
);
2941 /* FIXME: playback must be synchronized to capture */
2942 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2946 static int snd_usb_create_quirk(struct snd_usb_audio
*chip
,
2947 struct usb_interface
*iface
,
2948 const struct snd_usb_audio_quirk
*quirk
);
2951 * handle the quirks for the contained interfaces
2953 static int create_composite_quirk(struct snd_usb_audio
*chip
,
2954 struct usb_interface
*iface
,
2955 const struct snd_usb_audio_quirk
*quirk
)
2957 int probed_ifnum
= get_iface_desc(iface
->altsetting
)->bInterfaceNumber
;
2960 for (quirk
= quirk
->data
; quirk
->ifnum
>= 0; ++quirk
) {
2961 iface
= usb_ifnum_to_if(chip
->dev
, quirk
->ifnum
);
2964 if (quirk
->ifnum
!= probed_ifnum
&&
2965 usb_interface_claimed(iface
))
2967 err
= snd_usb_create_quirk(chip
, iface
, quirk
);
2970 if (quirk
->ifnum
!= probed_ifnum
)
2971 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2976 static int ignore_interface_quirk(struct snd_usb_audio
*chip
,
2977 struct usb_interface
*iface
,
2978 const struct snd_usb_audio_quirk
*quirk
)
2988 #define EXTIGY_FIRMWARE_SIZE_OLD 794
2989 #define EXTIGY_FIRMWARE_SIZE_NEW 483
2991 static int snd_usb_extigy_boot_quirk(struct usb_device
*dev
, struct usb_interface
*intf
)
2993 struct usb_host_config
*config
= dev
->actconfig
;
2996 if (le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_OLD
||
2997 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_NEW
) {
2998 snd_printdd("sending Extigy boot sequence...\n");
2999 /* Send message to force it to reconnect with full interface. */
3000 err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
,0),
3001 0x10, 0x43, 0x0001, 0x000a, NULL
, 0, 1000);
3002 if (err
< 0) snd_printdd("error sending boot message: %d\n", err
);
3003 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0,
3004 &dev
->descriptor
, sizeof(dev
->descriptor
));
3005 config
= dev
->actconfig
;
3006 if (err
< 0) snd_printdd("error usb_get_descriptor: %d\n", err
);
3007 err
= usb_reset_configuration(dev
);
3008 if (err
< 0) snd_printdd("error usb_reset_configuration: %d\n", err
);
3009 snd_printdd("extigy_boot: new boot length = %d\n",
3010 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
));
3011 return -ENODEV
; /* quit this anyway */
3016 static int snd_usb_audigy2nx_boot_quirk(struct usb_device
*dev
)
3020 snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), 0x2a,
3021 USB_DIR_IN
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3022 0, 0, &buf
, 1, 1000);
3024 snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), 0x29,
3025 USB_DIR_OUT
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3026 1, 2000, NULL
, 0, 1000);
3034 * audio-interface quirks
3036 * returns zero if no standard audio/MIDI parsing is needed.
3037 * returns a postive value if standard audio/midi interfaces are parsed
3039 * returns a negative value at error.
3041 static int snd_usb_create_quirk(struct snd_usb_audio
*chip
,
3042 struct usb_interface
*iface
,
3043 const struct snd_usb_audio_quirk
*quirk
)
3045 typedef int (*quirk_func_t
)(struct snd_usb_audio
*, struct usb_interface
*,
3046 const struct snd_usb_audio_quirk
*);
3047 static const quirk_func_t quirk_funcs
[] = {
3048 [QUIRK_IGNORE_INTERFACE
] = ignore_interface_quirk
,
3049 [QUIRK_COMPOSITE
] = create_composite_quirk
,
3050 [QUIRK_MIDI_STANDARD_INTERFACE
] = snd_usb_create_midi_interface
,
3051 [QUIRK_MIDI_FIXED_ENDPOINT
] = snd_usb_create_midi_interface
,
3052 [QUIRK_MIDI_YAMAHA
] = snd_usb_create_midi_interface
,
3053 [QUIRK_MIDI_MIDIMAN
] = snd_usb_create_midi_interface
,
3054 [QUIRK_MIDI_NOVATION
] = snd_usb_create_midi_interface
,
3055 [QUIRK_MIDI_RAW
] = snd_usb_create_midi_interface
,
3056 [QUIRK_MIDI_EMAGIC
] = snd_usb_create_midi_interface
,
3057 [QUIRK_MIDI_MIDITECH
] = snd_usb_create_midi_interface
,
3058 [QUIRK_AUDIO_STANDARD_INTERFACE
] = create_standard_audio_quirk
,
3059 [QUIRK_AUDIO_FIXED_ENDPOINT
] = create_fixed_stream_quirk
,
3060 [QUIRK_AUDIO_EDIROL_UA700_UA25
] = create_ua700_ua25_quirk
,
3061 [QUIRK_AUDIO_EDIROL_UA1000
] = create_ua1000_quirk
,
3064 if (quirk
->type
< QUIRK_TYPE_COUNT
) {
3065 return quirk_funcs
[quirk
->type
](chip
, iface
, quirk
);
3067 snd_printd(KERN_ERR
"invalid quirk type %d\n", quirk
->type
);
3074 * common proc files to show the usb device info
3076 static void proc_audio_usbbus_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
3078 struct snd_usb_audio
*chip
= entry
->private_data
;
3079 if (! chip
->shutdown
)
3080 snd_iprintf(buffer
, "%03d/%03d\n", chip
->dev
->bus
->busnum
, chip
->dev
->devnum
);
3083 static void proc_audio_usbid_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
3085 struct snd_usb_audio
*chip
= entry
->private_data
;
3086 if (! chip
->shutdown
)
3087 snd_iprintf(buffer
, "%04x:%04x\n",
3088 USB_ID_VENDOR(chip
->usb_id
),
3089 USB_ID_PRODUCT(chip
->usb_id
));
3092 static void snd_usb_audio_create_proc(struct snd_usb_audio
*chip
)
3094 struct snd_info_entry
*entry
;
3095 if (! snd_card_proc_new(chip
->card
, "usbbus", &entry
))
3096 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbbus_read
);
3097 if (! snd_card_proc_new(chip
->card
, "usbid", &entry
))
3098 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbid_read
);
3102 * free the chip instance
3104 * here we have to do not much, since pcm and controls are already freed
3108 static int snd_usb_audio_free(struct snd_usb_audio
*chip
)
3114 static int snd_usb_audio_dev_free(struct snd_device
*device
)
3116 struct snd_usb_audio
*chip
= device
->device_data
;
3117 return snd_usb_audio_free(chip
);
3122 * create a chip instance and set its names.
3124 static int snd_usb_audio_create(struct usb_device
*dev
, int idx
,
3125 const struct snd_usb_audio_quirk
*quirk
,
3126 struct snd_usb_audio
**rchip
)
3128 struct snd_card
*card
;
3129 struct snd_usb_audio
*chip
;
3132 static struct snd_device_ops ops
= {
3133 .dev_free
= snd_usb_audio_dev_free
,
3138 if (snd_usb_get_speed(dev
) != USB_SPEED_FULL
&&
3139 snd_usb_get_speed(dev
) != USB_SPEED_HIGH
) {
3140 snd_printk(KERN_ERR
"unknown device speed %d\n", snd_usb_get_speed(dev
));
3144 card
= snd_card_new(index
[idx
], id
[idx
], THIS_MODULE
, 0);
3146 snd_printk(KERN_ERR
"cannot create card instance %d\n", idx
);
3150 chip
= kzalloc(sizeof(*chip
), GFP_KERNEL
);
3152 snd_card_free(card
);
3159 chip
->usb_id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3160 le16_to_cpu(dev
->descriptor
.idProduct
));
3161 INIT_LIST_HEAD(&chip
->pcm_list
);
3162 INIT_LIST_HEAD(&chip
->midi_list
);
3163 INIT_LIST_HEAD(&chip
->mixer_list
);
3165 if ((err
= snd_device_new(card
, SNDRV_DEV_LOWLEVEL
, chip
, &ops
)) < 0) {
3166 snd_usb_audio_free(chip
);
3167 snd_card_free(card
);
3171 strcpy(card
->driver
, "USB-Audio");
3172 sprintf(component
, "USB%04x:%04x",
3173 USB_ID_VENDOR(chip
->usb_id
), USB_ID_PRODUCT(chip
->usb_id
));
3174 snd_component_add(card
, component
);
3176 /* retrieve the device string as shortname */
3177 if (quirk
&& quirk
->product_name
) {
3178 strlcpy(card
->shortname
, quirk
->product_name
, sizeof(card
->shortname
));
3180 if (!dev
->descriptor
.iProduct
||
3181 usb_string(dev
, dev
->descriptor
.iProduct
,
3182 card
->shortname
, sizeof(card
->shortname
)) <= 0) {
3183 /* no name available from anywhere, so use ID */
3184 sprintf(card
->shortname
, "USB Device %#04x:%#04x",
3185 USB_ID_VENDOR(chip
->usb_id
),
3186 USB_ID_PRODUCT(chip
->usb_id
));
3190 /* retrieve the vendor and device strings as longname */
3191 if (quirk
&& quirk
->vendor_name
) {
3192 len
= strlcpy(card
->longname
, quirk
->vendor_name
, sizeof(card
->longname
));
3194 if (dev
->descriptor
.iManufacturer
)
3195 len
= usb_string(dev
, dev
->descriptor
.iManufacturer
,
3196 card
->longname
, sizeof(card
->longname
));
3199 /* we don't really care if there isn't any vendor string */
3202 strlcat(card
->longname
, " ", sizeof(card
->longname
));
3204 strlcat(card
->longname
, card
->shortname
, sizeof(card
->longname
));
3206 len
= strlcat(card
->longname
, " at ", sizeof(card
->longname
));
3208 if (len
< sizeof(card
->longname
))
3209 usb_make_path(dev
, card
->longname
+ len
, sizeof(card
->longname
) - len
);
3211 strlcat(card
->longname
,
3212 snd_usb_get_speed(dev
) == USB_SPEED_FULL
? ", full speed" : ", high speed",
3213 sizeof(card
->longname
));
3215 snd_usb_audio_create_proc(chip
);
3223 * probe the active usb device
3225 * note that this can be called multiple times per a device, when it
3226 * includes multiple audio control interfaces.
3228 * thus we check the usb device pointer and creates the card instance
3229 * only at the first time. the successive calls of this function will
3230 * append the pcm interface to the corresponding card.
3232 static void *snd_usb_audio_probe(struct usb_device
*dev
,
3233 struct usb_interface
*intf
,
3234 const struct usb_device_id
*usb_id
)
3236 const struct snd_usb_audio_quirk
*quirk
= (const struct snd_usb_audio_quirk
*)usb_id
->driver_info
;
3238 struct snd_usb_audio
*chip
;
3239 struct usb_host_interface
*alts
;
3243 alts
= &intf
->altsetting
[0];
3244 ifnum
= get_iface_desc(alts
)->bInterfaceNumber
;
3245 id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3246 le16_to_cpu(dev
->descriptor
.idProduct
));
3248 if (quirk
&& quirk
->ifnum
>= 0 && ifnum
!= quirk
->ifnum
)
3251 /* SB Extigy needs special boot-up sequence */
3252 /* if more models come, this will go to the quirk list. */
3253 if (id
== USB_ID(0x041e, 0x3000)) {
3254 if (snd_usb_extigy_boot_quirk(dev
, intf
) < 0)
3257 /* SB Audigy 2 NX needs its own boot-up magic, too */
3258 if (id
== USB_ID(0x041e, 0x3020)) {
3259 if (snd_usb_audigy2nx_boot_quirk(dev
) < 0)
3264 * found a config. now register to ALSA
3267 /* check whether it's already registered */
3269 down(®ister_mutex
);
3270 for (i
= 0; i
< SNDRV_CARDS
; i
++) {
3271 if (usb_chip
[i
] && usb_chip
[i
]->dev
== dev
) {
3272 if (usb_chip
[i
]->shutdown
) {
3273 snd_printk(KERN_ERR
"USB device is in the shutdown state, cannot create a card instance\n");
3281 /* it's a fresh one.
3282 * now look for an empty slot and create a new card instance
3284 for (i
= 0; i
< SNDRV_CARDS
; i
++)
3285 if (enable
[i
] && ! usb_chip
[i
] &&
3286 (vid
[i
] == -1 || vid
[i
] == USB_ID_VENDOR(id
)) &&
3287 (pid
[i
] == -1 || pid
[i
] == USB_ID_PRODUCT(id
))) {
3288 if (snd_usb_audio_create(dev
, i
, quirk
, &chip
) < 0) {
3291 snd_card_set_dev(chip
->card
, &intf
->dev
);
3295 snd_printk(KERN_ERR
"no available usb audio device\n");
3300 err
= 1; /* continue */
3301 if (quirk
&& quirk
->ifnum
!= QUIRK_NO_INTERFACE
) {
3302 /* need some special handlings */
3303 if ((err
= snd_usb_create_quirk(chip
, intf
, quirk
)) < 0)
3308 /* create normal USB audio interfaces */
3309 if (snd_usb_create_streams(chip
, ifnum
) < 0 ||
3310 snd_usb_create_mixer(chip
, ifnum
) < 0) {
3315 /* we are allowed to call snd_card_register() many times */
3316 if (snd_card_register(chip
->card
) < 0) {
3320 usb_chip
[chip
->index
] = chip
;
3321 chip
->num_interfaces
++;
3322 up(®ister_mutex
);
3326 if (chip
&& !chip
->num_interfaces
)
3327 snd_card_free(chip
->card
);
3328 up(®ister_mutex
);
3334 * we need to take care of counter, since disconnection can be called also
3335 * many times as well as usb_audio_probe().
3337 static void snd_usb_audio_disconnect(struct usb_device
*dev
, void *ptr
)
3339 struct snd_usb_audio
*chip
;
3340 struct snd_card
*card
;
3341 struct list_head
*p
;
3343 if (ptr
== (void *)-1L)
3348 down(®ister_mutex
);
3350 chip
->num_interfaces
--;
3351 if (chip
->num_interfaces
<= 0) {
3352 snd_card_disconnect(card
);
3353 /* release the pcm resources */
3354 list_for_each(p
, &chip
->pcm_list
) {
3355 snd_usb_stream_disconnect(p
);
3357 /* release the midi resources */
3358 list_for_each(p
, &chip
->midi_list
) {
3359 snd_usbmidi_disconnect(p
);
3361 /* release mixer resources */
3362 list_for_each(p
, &chip
->mixer_list
) {
3363 snd_usb_mixer_disconnect(p
);
3365 usb_chip
[chip
->index
] = NULL
;
3366 up(®ister_mutex
);
3367 snd_card_free(card
);
3369 up(®ister_mutex
);
3374 * new 2.5 USB kernel API
3376 static int usb_audio_probe(struct usb_interface
*intf
,
3377 const struct usb_device_id
*id
)
3380 chip
= snd_usb_audio_probe(interface_to_usbdev(intf
), intf
, id
);
3382 dev_set_drvdata(&intf
->dev
, chip
);
3388 static void usb_audio_disconnect(struct usb_interface
*intf
)
3390 snd_usb_audio_disconnect(interface_to_usbdev(intf
),
3391 dev_get_drvdata(&intf
->dev
));
3395 static int __init
snd_usb_audio_init(void)
3397 if (nrpacks
< MIN_PACKS_URB
|| nrpacks
> MAX_PACKS
) {
3398 printk(KERN_WARNING
"invalid nrpacks value.\n");
3401 usb_register(&usb_audio_driver
);
3406 static void __exit
snd_usb_audio_cleanup(void)
3408 usb_deregister(&usb_audio_driver
);
3411 module_init(snd_usb_audio_init
);
3412 module_exit(snd_usb_audio_cleanup
);