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/interrupt.h>
45 #include <linux/list.h>
46 #include <linux/slab.h>
47 #include <linux/string.h>
48 #include <linux/usb.h>
49 #include <linux/vmalloc.h>
50 #include <linux/moduleparam.h>
51 #include <sound/core.h>
52 #include <sound/info.h>
53 #include <sound/pcm.h>
54 #include <sound/pcm_params.h>
55 #include <sound/initval.h>
60 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
61 MODULE_DESCRIPTION("USB Audio");
62 MODULE_LICENSE("GPL");
63 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
66 static int index
[SNDRV_CARDS
] = SNDRV_DEFAULT_IDX
; /* Index 0-MAX */
67 static char *id
[SNDRV_CARDS
] = SNDRV_DEFAULT_STR
; /* ID for this card */
68 static int enable
[SNDRV_CARDS
] = SNDRV_DEFAULT_ENABLE_PNP
; /* Enable this card */
69 static int vid
[SNDRV_CARDS
] = { [0 ... (SNDRV_CARDS
-1)] = -1 }; /* Vendor ID for this card */
70 static int pid
[SNDRV_CARDS
] = { [0 ... (SNDRV_CARDS
-1)] = -1 }; /* Product ID for this card */
71 static int nrpacks
= 4; /* max. number of packets per urb */
72 static int async_unlink
= 1;
74 module_param_array(index
, int, NULL
, 0444);
75 MODULE_PARM_DESC(index
, "Index value for the USB audio adapter.");
76 module_param_array(id
, charp
, NULL
, 0444);
77 MODULE_PARM_DESC(id
, "ID string for the USB audio adapter.");
78 module_param_array(enable
, bool, NULL
, 0444);
79 MODULE_PARM_DESC(enable
, "Enable USB audio adapter.");
80 module_param_array(vid
, int, NULL
, 0444);
81 MODULE_PARM_DESC(vid
, "Vendor ID for the USB audio device.");
82 module_param_array(pid
, int, NULL
, 0444);
83 MODULE_PARM_DESC(pid
, "Product ID for the USB audio device.");
84 module_param(nrpacks
, int, 0644);
85 MODULE_PARM_DESC(nrpacks
, "Max. number of packets per URB.");
86 module_param(async_unlink
, bool, 0444);
87 MODULE_PARM_DESC(async_unlink
, "Use async unlink mode.");
91 * debug the h/w constraints
93 /* #define HW_CONST_DEBUG */
101 #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
103 #define SYNC_URBS 4 /* always four urbs for sync */
104 #define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
106 typedef struct snd_usb_substream snd_usb_substream_t
;
107 typedef struct snd_usb_stream snd_usb_stream_t
;
108 typedef struct snd_urb_ctx snd_urb_ctx_t
;
111 struct list_head list
;
112 snd_pcm_format_t format
; /* format type */
113 unsigned int channels
; /* # channels */
114 unsigned int fmt_type
; /* USB audio format type (1-3) */
115 unsigned int frame_size
; /* samples per frame for non-audio */
116 int iface
; /* interface number */
117 unsigned char altsetting
; /* corresponding alternate setting */
118 unsigned char altset_idx
; /* array index of altenate setting */
119 unsigned char attributes
; /* corresponding attributes of cs endpoint */
120 unsigned char endpoint
; /* endpoint */
121 unsigned char ep_attr
; /* endpoint attributes */
122 unsigned int maxpacksize
; /* max. packet size */
123 unsigned int rates
; /* rate bitmasks */
124 unsigned int rate_min
, rate_max
; /* min/max rates */
125 unsigned int nr_rates
; /* number of rate table entries */
126 unsigned int *rate_table
; /* rate table */
131 unsigned int buffer_size
; /* size of data buffer, if data URB */
132 snd_usb_substream_t
*subs
;
133 int index
; /* index for urb array */
134 int packets
; /* number of packets per urb */
138 int (*prepare
)(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
, struct urb
*u
);
139 int (*retire
)(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
, struct urb
*u
);
140 int (*prepare_sync
)(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
, struct urb
*u
);
141 int (*retire_sync
)(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
, struct urb
*u
);
144 struct snd_usb_substream
{
145 snd_usb_stream_t
*stream
;
146 struct usb_device
*dev
;
147 snd_pcm_substream_t
*pcm_substream
;
148 int direction
; /* playback or capture */
149 int interface
; /* current interface */
150 int endpoint
; /* assigned endpoint */
151 struct audioformat
*cur_audiofmt
; /* current audioformat pointer (for hw_params callback) */
152 unsigned int cur_rate
; /* current rate (for hw_params callback) */
153 unsigned int period_bytes
; /* current period bytes (for hw_params callback) */
154 unsigned int format
; /* USB data format */
155 unsigned int datapipe
; /* the data i/o pipe */
156 unsigned int syncpipe
; /* 1 - async out or adaptive in */
157 unsigned int datainterval
; /* log_2 of data packet interval */
158 unsigned int syncinterval
; /* P for adaptive mode, 0 otherwise */
159 unsigned int freqn
; /* nominal sampling rate in fs/fps in Q16.16 format */
160 unsigned int freqm
; /* momentary sampling rate in fs/fps in Q16.16 format */
161 unsigned int freqmax
; /* maximum sampling rate, used for buffer management */
162 unsigned int phase
; /* phase accumulator */
163 unsigned int maxpacksize
; /* max packet size in bytes */
164 unsigned int maxframesize
; /* max packet size in frames */
165 unsigned int curpacksize
; /* current packet size in bytes (for capture) */
166 unsigned int curframesize
; /* current packet size in frames (for capture) */
167 unsigned int fill_max
: 1; /* fill max packet size always */
168 unsigned int fmt_type
; /* USB audio format type (1-3) */
169 unsigned int packs_per_ms
; /* packets per millisecond (for playback) */
171 unsigned int running
: 1; /* running status */
173 unsigned int hwptr_done
; /* processed frame position in the buffer */
174 unsigned int transfer_done
; /* processed frames since last period update */
175 unsigned long active_mask
; /* bitmask of active urbs */
176 unsigned long unlink_mask
; /* bitmask of unlinked urbs */
178 unsigned int nurbs
; /* # urbs */
179 snd_urb_ctx_t dataurb
[MAX_URBS
]; /* data urb table */
180 snd_urb_ctx_t syncurb
[SYNC_URBS
]; /* sync urb table */
181 char *syncbuf
; /* sync buffer for all sync URBs */
182 dma_addr_t sync_dma
; /* DMA address of syncbuf */
184 u64 formats
; /* format bitmasks (all or'ed) */
185 unsigned int num_formats
; /* number of supported audio formats (list) */
186 struct list_head fmt_list
; /* format list */
188 struct tasklet_struct start_period_elapsed
; /* for start trigger */
190 struct snd_urb_ops ops
; /* callbacks (must be filled at init) */
194 struct snd_usb_stream
{
195 snd_usb_audio_t
*chip
;
198 unsigned int fmt_type
; /* USB audio format type (1-3) */
199 snd_usb_substream_t substream
[2];
200 struct list_head list
;
205 * we keep the snd_usb_audio_t instances by ourselves for merging
206 * the all interfaces on the same card as one sound device.
209 static DECLARE_MUTEX(register_mutex
);
210 static snd_usb_audio_t
*usb_chip
[SNDRV_CARDS
];
214 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
215 * this will overflow at approx 524 kHz
217 static inline unsigned get_usb_full_speed_rate(unsigned int rate
)
219 return ((rate
<< 13) + 62) / 125;
223 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
224 * this will overflow at approx 4 MHz
226 static inline unsigned get_usb_high_speed_rate(unsigned int rate
)
228 return ((rate
<< 10) + 62) / 125;
231 /* convert our full speed USB rate into sampling rate in Hz */
232 static inline unsigned get_full_speed_hz(unsigned int usb_rate
)
234 return (usb_rate
* 125 + (1 << 12)) >> 13;
237 /* convert our high speed USB rate into sampling rate in Hz */
238 static inline unsigned get_high_speed_hz(unsigned int usb_rate
)
240 return (usb_rate
* 125 + (1 << 9)) >> 10;
245 * prepare urb for full speed capture sync pipe
247 * fill the length and offset of each urb descriptor.
248 * the fixed 10.14 frequency is passed through the pipe.
250 static int prepare_capture_sync_urb(snd_usb_substream_t
*subs
,
251 snd_pcm_runtime_t
*runtime
,
254 unsigned char *cp
= urb
->transfer_buffer
;
255 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
257 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
258 urb
->iso_frame_desc
[0].length
= 3;
259 urb
->iso_frame_desc
[0].offset
= 0;
260 cp
[0] = subs
->freqn
>> 2;
261 cp
[1] = subs
->freqn
>> 10;
262 cp
[2] = subs
->freqn
>> 18;
267 * prepare urb for high speed capture sync pipe
269 * fill the length and offset of each urb descriptor.
270 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
272 static int prepare_capture_sync_urb_hs(snd_usb_substream_t
*subs
,
273 snd_pcm_runtime_t
*runtime
,
276 unsigned char *cp
= urb
->transfer_buffer
;
277 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
279 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
280 urb
->iso_frame_desc
[0].length
= 4;
281 urb
->iso_frame_desc
[0].offset
= 0;
283 cp
[1] = subs
->freqn
>> 8;
284 cp
[2] = subs
->freqn
>> 16;
285 cp
[3] = subs
->freqn
>> 24;
290 * process after capture sync complete
293 static int retire_capture_sync_urb(snd_usb_substream_t
*subs
,
294 snd_pcm_runtime_t
*runtime
,
301 * prepare urb for capture data pipe
303 * fill the offset and length of each descriptor.
305 * we use a temporary buffer to write the captured data.
306 * since the length of written data is determined by host, we cannot
307 * write onto the pcm buffer directly... the data is thus copied
308 * later at complete callback to the global buffer.
310 static int prepare_capture_urb(snd_usb_substream_t
*subs
,
311 snd_pcm_runtime_t
*runtime
,
315 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
318 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
319 for (i
= 0; i
< ctx
->packets
; i
++) {
320 urb
->iso_frame_desc
[i
].offset
= offs
;
321 urb
->iso_frame_desc
[i
].length
= subs
->curpacksize
;
322 offs
+= subs
->curpacksize
;
324 urb
->transfer_buffer_length
= offs
;
325 urb
->number_of_packets
= ctx
->packets
;
327 if (! urb
->bandwidth
) {
329 bustime
= usb_check_bandwidth(urb
->dev
, urb
);
332 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx
->index
, bustime
, urb
->number_of_packets
);
333 usb_claim_bandwidth(urb
->dev
, urb
, bustime
, 1);
340 * process after capture complete
342 * copy the data from each desctiptor to the pcm buffer, and
343 * update the current position.
345 static int retire_capture_urb(snd_usb_substream_t
*subs
,
346 snd_pcm_runtime_t
*runtime
,
352 unsigned int stride
, len
, oldptr
;
353 int period_elapsed
= 0;
355 stride
= runtime
->frame_bits
>> 3;
357 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
358 cp
= (unsigned char *)urb
->transfer_buffer
+ urb
->iso_frame_desc
[i
].offset
;
359 if (urb
->iso_frame_desc
[i
].status
) {
360 snd_printd(KERN_ERR
"frame %d active: %d\n", i
, urb
->iso_frame_desc
[i
].status
);
363 len
= urb
->iso_frame_desc
[i
].actual_length
/ stride
;
366 /* update the current pointer */
367 spin_lock_irqsave(&subs
->lock
, flags
);
368 oldptr
= subs
->hwptr_done
;
369 subs
->hwptr_done
+= len
;
370 if (subs
->hwptr_done
>= runtime
->buffer_size
)
371 subs
->hwptr_done
-= runtime
->buffer_size
;
372 subs
->transfer_done
+= len
;
373 if (subs
->transfer_done
>= runtime
->period_size
) {
374 subs
->transfer_done
-= runtime
->period_size
;
377 spin_unlock_irqrestore(&subs
->lock
, flags
);
378 /* copy a data chunk */
379 if (oldptr
+ len
> runtime
->buffer_size
) {
380 unsigned int cnt
= runtime
->buffer_size
- oldptr
;
381 unsigned int blen
= cnt
* stride
;
382 memcpy(runtime
->dma_area
+ oldptr
* stride
, cp
, blen
);
383 memcpy(runtime
->dma_area
, cp
+ blen
, len
* stride
- blen
);
385 memcpy(runtime
->dma_area
+ oldptr
* stride
, cp
, len
* stride
);
389 snd_pcm_period_elapsed(subs
->pcm_substream
);
395 * prepare urb for full speed playback sync pipe
397 * set up the offset and length to receive the current frequency.
400 static int prepare_playback_sync_urb(snd_usb_substream_t
*subs
,
401 snd_pcm_runtime_t
*runtime
,
404 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
406 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
407 urb
->iso_frame_desc
[0].length
= 3;
408 urb
->iso_frame_desc
[0].offset
= 0;
413 * prepare urb for high speed playback sync pipe
415 * set up the offset and length to receive the current frequency.
418 static int prepare_playback_sync_urb_hs(snd_usb_substream_t
*subs
,
419 snd_pcm_runtime_t
*runtime
,
422 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
424 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
425 urb
->iso_frame_desc
[0].length
= 4;
426 urb
->iso_frame_desc
[0].offset
= 0;
431 * process after full speed playback sync complete
433 * retrieve the current 10.14 frequency from pipe, and set it.
434 * the value is referred in prepare_playback_urb().
436 static int retire_playback_sync_urb(snd_usb_substream_t
*subs
,
437 snd_pcm_runtime_t
*runtime
,
443 if (urb
->iso_frame_desc
[0].status
== 0 &&
444 urb
->iso_frame_desc
[0].actual_length
== 3) {
445 f
= combine_triple((u8
*)urb
->transfer_buffer
) << 2;
446 if (f
>= subs
->freqn
- subs
->freqn
/ 8 && f
<= subs
->freqmax
) {
447 spin_lock_irqsave(&subs
->lock
, flags
);
449 spin_unlock_irqrestore(&subs
->lock
, flags
);
457 * process after high speed playback sync complete
459 * retrieve the current 12.13 frequency from pipe, and set it.
460 * the value is referred in prepare_playback_urb().
462 static int retire_playback_sync_urb_hs(snd_usb_substream_t
*subs
,
463 snd_pcm_runtime_t
*runtime
,
469 if (urb
->iso_frame_desc
[0].status
== 0 &&
470 urb
->iso_frame_desc
[0].actual_length
== 4) {
471 f
= combine_quad((u8
*)urb
->transfer_buffer
) & 0x0fffffff;
472 if (f
>= subs
->freqn
- subs
->freqn
/ 8 && f
<= subs
->freqmax
) {
473 spin_lock_irqsave(&subs
->lock
, flags
);
475 spin_unlock_irqrestore(&subs
->lock
, flags
);
483 * prepare urb for playback data pipe
485 * Since a URB can handle only a single linear buffer, we must use double
486 * buffering when the data to be transferred overflows the buffer boundary.
487 * To avoid inconsistencies when updating hwptr_done, we use double buffering
490 static int prepare_playback_urb(snd_usb_substream_t
*subs
,
491 snd_pcm_runtime_t
*runtime
,
497 int period_elapsed
= 0;
498 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
500 stride
= runtime
->frame_bits
>> 3;
503 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
504 urb
->number_of_packets
= 0;
505 spin_lock_irqsave(&subs
->lock
, flags
);
506 for (i
= 0; i
< ctx
->packets
; i
++) {
507 /* calculate the size of a packet */
509 counts
= subs
->maxframesize
; /* fixed */
511 subs
->phase
= (subs
->phase
& 0xffff)
512 + (subs
->freqm
<< subs
->datainterval
);
513 counts
= subs
->phase
>> 16;
514 if (counts
> subs
->maxframesize
)
515 counts
= subs
->maxframesize
;
517 /* set up descriptor */
518 urb
->iso_frame_desc
[i
].offset
= offs
* stride
;
519 urb
->iso_frame_desc
[i
].length
= counts
* stride
;
521 urb
->number_of_packets
++;
522 subs
->transfer_done
+= counts
;
523 if (subs
->transfer_done
>= runtime
->period_size
) {
524 subs
->transfer_done
-= runtime
->period_size
;
526 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
) {
527 if (subs
->transfer_done
> 0) {
528 /* FIXME: fill-max mode is not
530 offs
-= subs
->transfer_done
;
531 counts
-= subs
->transfer_done
;
532 urb
->iso_frame_desc
[i
].length
=
534 subs
->transfer_done
= 0;
537 if (i
< ctx
->packets
) {
538 /* add a transfer delimiter */
539 urb
->iso_frame_desc
[i
].offset
=
541 urb
->iso_frame_desc
[i
].length
= 0;
542 urb
->number_of_packets
++;
547 /* finish at the frame boundary at/after the period boundary */
548 if (period_elapsed
&&
549 (i
& (subs
->packs_per_ms
- 1)) == subs
->packs_per_ms
- 1)
552 if (subs
->hwptr_done
+ offs
> runtime
->buffer_size
) {
553 /* err, the transferred area goes over buffer boundary. */
554 unsigned int len
= runtime
->buffer_size
- subs
->hwptr_done
;
555 memcpy(urb
->transfer_buffer
,
556 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
558 memcpy(urb
->transfer_buffer
+ len
* stride
,
560 (offs
- len
) * stride
);
562 memcpy(urb
->transfer_buffer
,
563 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
566 subs
->hwptr_done
+= offs
;
567 if (subs
->hwptr_done
>= runtime
->buffer_size
)
568 subs
->hwptr_done
-= runtime
->buffer_size
;
569 spin_unlock_irqrestore(&subs
->lock
, flags
);
570 urb
->transfer_buffer_length
= offs
* stride
;
571 if (period_elapsed
) {
572 if (likely(subs
->running
))
573 snd_pcm_period_elapsed(subs
->pcm_substream
);
575 tasklet_hi_schedule(&subs
->start_period_elapsed
);
581 * process after playback data complete
584 static int retire_playback_urb(snd_usb_substream_t
*subs
,
585 snd_pcm_runtime_t
*runtime
,
592 * Delay the snd_pcm_period_elapsed() call until after the start trigger
593 * callback so that we're not longer in the substream's lock.
595 static void start_period_elapsed(unsigned long data
)
597 snd_usb_substream_t
*subs
= (snd_usb_substream_t
*)data
;
598 snd_pcm_period_elapsed(subs
->pcm_substream
);
604 static struct snd_urb_ops audio_urb_ops
[2] = {
606 .prepare
= prepare_playback_urb
,
607 .retire
= retire_playback_urb
,
608 .prepare_sync
= prepare_playback_sync_urb
,
609 .retire_sync
= retire_playback_sync_urb
,
612 .prepare
= prepare_capture_urb
,
613 .retire
= retire_capture_urb
,
614 .prepare_sync
= prepare_capture_sync_urb
,
615 .retire_sync
= retire_capture_sync_urb
,
619 static struct snd_urb_ops audio_urb_ops_high_speed
[2] = {
621 .prepare
= prepare_playback_urb
,
622 .retire
= retire_playback_urb
,
623 .prepare_sync
= prepare_playback_sync_urb_hs
,
624 .retire_sync
= retire_playback_sync_urb_hs
,
627 .prepare
= prepare_capture_urb
,
628 .retire
= retire_capture_urb
,
629 .prepare_sync
= prepare_capture_sync_urb_hs
,
630 .retire_sync
= retire_capture_sync_urb
,
635 * complete callback from data urb
637 static void snd_complete_urb(struct urb
*urb
, struct pt_regs
*regs
)
639 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
640 snd_usb_substream_t
*subs
= ctx
->subs
;
641 snd_pcm_substream_t
*substream
= ctx
->subs
->pcm_substream
;
644 if ((subs
->running
&& subs
->ops
.retire(subs
, substream
->runtime
, urb
)) ||
645 ! subs
->running
|| /* can be stopped during retire callback */
646 (err
= subs
->ops
.prepare(subs
, substream
->runtime
, urb
)) < 0 ||
647 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
648 clear_bit(ctx
->index
, &subs
->active_mask
);
650 snd_printd(KERN_ERR
"cannot submit urb (err = %d)\n", err
);
651 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
658 * complete callback from sync urb
660 static void snd_complete_sync_urb(struct urb
*urb
, struct pt_regs
*regs
)
662 snd_urb_ctx_t
*ctx
= (snd_urb_ctx_t
*)urb
->context
;
663 snd_usb_substream_t
*subs
= ctx
->subs
;
664 snd_pcm_substream_t
*substream
= ctx
->subs
->pcm_substream
;
667 if ((subs
->running
&& subs
->ops
.retire_sync(subs
, substream
->runtime
, urb
)) ||
668 ! subs
->running
|| /* can be stopped during retire callback */
669 (err
= subs
->ops
.prepare_sync(subs
, substream
->runtime
, urb
)) < 0 ||
670 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
671 clear_bit(ctx
->index
+ 16, &subs
->active_mask
);
673 snd_printd(KERN_ERR
"cannot submit sync urb (err = %d)\n", err
);
674 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
680 /* get the physical page pointer at the given offset */
681 static struct page
*snd_pcm_get_vmalloc_page(snd_pcm_substream_t
*subs
,
682 unsigned long offset
)
684 void *pageptr
= subs
->runtime
->dma_area
+ offset
;
685 return vmalloc_to_page(pageptr
);
688 /* allocate virtual buffer; may be called more than once */
689 static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t
*subs
, size_t size
)
691 snd_pcm_runtime_t
*runtime
= subs
->runtime
;
692 if (runtime
->dma_area
) {
693 if (runtime
->dma_bytes
>= size
)
694 return 0; /* already large enough */
695 vfree_nocheck(runtime
->dma_area
);
697 runtime
->dma_area
= vmalloc_nocheck(size
);
698 if (! runtime
->dma_area
)
700 runtime
->dma_bytes
= size
;
704 /* free virtual buffer; may be called more than once */
705 static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t
*subs
)
707 snd_pcm_runtime_t
*runtime
= subs
->runtime
;
708 if (runtime
->dma_area
) {
709 vfree_nocheck(runtime
->dma_area
);
710 runtime
->dma_area
= NULL
;
717 * unlink active urbs.
719 static int deactivate_urbs(snd_usb_substream_t
*subs
, int force
, int can_sleep
)
726 if (!force
&& subs
->stream
->chip
->shutdown
) /* to be sure... */
729 async
= !can_sleep
&& async_unlink
;
731 if (! async
&& in_interrupt())
734 for (i
= 0; i
< subs
->nurbs
; i
++) {
735 if (test_bit(i
, &subs
->active_mask
)) {
736 if (! test_and_set_bit(i
, &subs
->unlink_mask
)) {
737 struct urb
*u
= subs
->dataurb
[i
].urb
;
739 u
->transfer_flags
|= URB_ASYNC_UNLINK
;
746 if (subs
->syncpipe
) {
747 for (i
= 0; i
< SYNC_URBS
; i
++) {
748 if (test_bit(i
+16, &subs
->active_mask
)) {
749 if (! test_and_set_bit(i
+16, &subs
->unlink_mask
)) {
750 struct urb
*u
= subs
->syncurb
[i
].urb
;
752 u
->transfer_flags
|= URB_ASYNC_UNLINK
;
765 * set up and start data/sync urbs
767 static int start_urbs(snd_usb_substream_t
*subs
, snd_pcm_runtime_t
*runtime
)
772 if (subs
->stream
->chip
->shutdown
)
775 for (i
= 0; i
< subs
->nurbs
; i
++) {
776 snd_assert(subs
->dataurb
[i
].urb
, return -EINVAL
);
777 if (subs
->ops
.prepare(subs
, runtime
, subs
->dataurb
[i
].urb
) < 0) {
778 snd_printk(KERN_ERR
"cannot prepare datapipe for urb %d\n", i
);
782 if (subs
->syncpipe
) {
783 for (i
= 0; i
< SYNC_URBS
; i
++) {
784 snd_assert(subs
->syncurb
[i
].urb
, return -EINVAL
);
785 if (subs
->ops
.prepare_sync(subs
, runtime
, subs
->syncurb
[i
].urb
) < 0) {
786 snd_printk(KERN_ERR
"cannot prepare syncpipe for urb %d\n", i
);
792 subs
->active_mask
= 0;
793 subs
->unlink_mask
= 0;
795 for (i
= 0; i
< subs
->nurbs
; i
++) {
796 if ((err
= usb_submit_urb(subs
->dataurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
797 snd_printk(KERN_ERR
"cannot submit datapipe for urb %d, err = %d\n", i
, err
);
800 set_bit(i
, &subs
->active_mask
);
802 if (subs
->syncpipe
) {
803 for (i
= 0; i
< SYNC_URBS
; i
++) {
804 if ((err
= usb_submit_urb(subs
->syncurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
805 snd_printk(KERN_ERR
"cannot submit syncpipe for urb %d, err = %d\n", i
, err
);
808 set_bit(i
+ 16, &subs
->active_mask
);
814 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
815 deactivate_urbs(subs
, 0, 0);
821 * wait until all urbs are processed.
823 static int wait_clear_urbs(snd_usb_substream_t
*subs
)
825 unsigned long end_time
= jiffies
+ msecs_to_jiffies(1000);
831 for (i
= 0; i
< subs
->nurbs
; i
++) {
832 if (test_bit(i
, &subs
->active_mask
))
835 if (subs
->syncpipe
) {
836 for (i
= 0; i
< SYNC_URBS
; i
++) {
837 if (test_bit(i
+ 16, &subs
->active_mask
))
843 set_current_state(TASK_UNINTERRUPTIBLE
);
845 } while (time_before(jiffies
, end_time
));
847 snd_printk(KERN_ERR
"timeout: still %d active urbs..\n", alive
);
853 * return the current pcm pointer. just return the hwptr_done value.
855 static snd_pcm_uframes_t
snd_usb_pcm_pointer(snd_pcm_substream_t
*substream
)
857 snd_usb_substream_t
*subs
;
858 snd_pcm_uframes_t hwptr_done
;
860 subs
= (snd_usb_substream_t
*)substream
->runtime
->private_data
;
861 spin_lock(&subs
->lock
);
862 hwptr_done
= subs
->hwptr_done
;
863 spin_unlock(&subs
->lock
);
869 * start/stop substream
871 static int snd_usb_pcm_trigger(snd_pcm_substream_t
*substream
, int cmd
)
873 snd_usb_substream_t
*subs
= (snd_usb_substream_t
*)substream
->runtime
->private_data
;
877 case SNDRV_PCM_TRIGGER_START
:
878 err
= start_urbs(subs
, substream
->runtime
);
880 case SNDRV_PCM_TRIGGER_STOP
:
881 err
= deactivate_urbs(subs
, 0, 0);
887 return err
< 0 ? err
: 0;
894 static void release_urb_ctx(snd_urb_ctx_t
*u
)
898 usb_buffer_free(u
->subs
->dev
, u
->buffer_size
,
899 u
->urb
->transfer_buffer
,
900 u
->urb
->transfer_dma
);
901 usb_free_urb(u
->urb
);
907 * release a substream
909 static void release_substream_urbs(snd_usb_substream_t
*subs
, int force
)
913 /* stop urbs (to be sure) */
914 deactivate_urbs(subs
, force
, 1);
915 wait_clear_urbs(subs
);
917 for (i
= 0; i
< MAX_URBS
; i
++)
918 release_urb_ctx(&subs
->dataurb
[i
]);
919 for (i
= 0; i
< SYNC_URBS
; i
++)
920 release_urb_ctx(&subs
->syncurb
[i
]);
921 usb_buffer_free(subs
->dev
, SYNC_URBS
* 4,
922 subs
->syncbuf
, subs
->sync_dma
);
923 subs
->syncbuf
= NULL
;
928 * initialize a substream for plaback/capture
930 static int init_substream_urbs(snd_usb_substream_t
*subs
, unsigned int period_bytes
,
931 unsigned int rate
, unsigned int frame_bits
)
933 unsigned int maxsize
, n
, i
;
934 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
935 unsigned int npacks
[MAX_URBS
], urb_packs
, total_packs
, packs_per_ms
;
937 /* calculate the frequency in 16.16 format */
938 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
939 subs
->freqn
= get_usb_full_speed_rate(rate
);
941 subs
->freqn
= get_usb_high_speed_rate(rate
);
942 subs
->freqm
= subs
->freqn
;
943 /* calculate max. frequency */
944 if (subs
->maxpacksize
) {
945 /* whatever fits into a max. size packet */
946 maxsize
= subs
->maxpacksize
;
947 subs
->freqmax
= (maxsize
/ (frame_bits
>> 3))
948 << (16 - subs
->datainterval
);
950 /* no max. packet size: just take 25% higher than nominal */
951 subs
->freqmax
= subs
->freqn
+ (subs
->freqn
>> 2);
952 maxsize
= ((subs
->freqmax
+ 0xffff) * (frame_bits
>> 3))
953 >> (16 - subs
->datainterval
);
958 subs
->curpacksize
= subs
->maxpacksize
;
960 subs
->curpacksize
= maxsize
;
962 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
)
963 packs_per_ms
= 8 >> subs
->datainterval
;
966 subs
->packs_per_ms
= packs_per_ms
;
970 urb_packs
= max(urb_packs
, (unsigned int)MIN_PACKS_URB
);
971 urb_packs
= min(urb_packs
, (unsigned int)MAX_PACKS
);
974 urb_packs
*= packs_per_ms
;
976 /* decide how many packets to be used */
978 unsigned int minsize
;
979 /* determine how small a packet can be */
980 minsize
= (subs
->freqn
>> (16 - subs
->datainterval
))
982 /* with sync from device, assume it can be 12% lower */
984 minsize
-= minsize
>> 3;
985 minsize
= max(minsize
, 1u);
986 total_packs
= (period_bytes
+ minsize
- 1) / minsize
;
987 /* round up to multiple of packs_per_ms */
988 total_packs
= (total_packs
+ packs_per_ms
- 1)
989 & ~(packs_per_ms
- 1);
990 /* we need at least two URBs for queueing */
991 if (total_packs
< 2 * MIN_PACKS_URB
* packs_per_ms
)
992 total_packs
= 2 * MIN_PACKS_URB
* packs_per_ms
;
994 total_packs
= MAX_URBS
* urb_packs
;
996 subs
->nurbs
= (total_packs
+ urb_packs
- 1) / urb_packs
;
997 if (subs
->nurbs
> MAX_URBS
) {
999 subs
->nurbs
= MAX_URBS
;
1000 total_packs
= MAX_URBS
* urb_packs
;
1003 for (i
= 0; i
< subs
->nurbs
; i
++) {
1004 npacks
[i
] = n
> urb_packs
? urb_packs
: n
;
1007 if (subs
->nurbs
<= 1) {
1008 /* too little - we need at least two packets
1009 * to ensure contiguous playback/capture
1012 npacks
[0] = (total_packs
+ 1) / 2;
1013 npacks
[1] = total_packs
- npacks
[0];
1014 } else if (npacks
[subs
->nurbs
-1] < MIN_PACKS_URB
* packs_per_ms
) {
1015 /* the last packet is too small.. */
1016 if (subs
->nurbs
> 2) {
1017 /* merge to the first one */
1018 npacks
[0] += npacks
[subs
->nurbs
- 1];
1023 npacks
[0] = (total_packs
+ 1) / 2;
1024 npacks
[1] = total_packs
- npacks
[0];
1028 /* allocate and initialize data urbs */
1029 for (i
= 0; i
< subs
->nurbs
; i
++) {
1030 snd_urb_ctx_t
*u
= &subs
->dataurb
[i
];
1033 u
->packets
= npacks
[i
];
1034 u
->buffer_size
= maxsize
* u
->packets
;
1035 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
)
1036 u
->packets
++; /* for transfer delimiter */
1037 u
->urb
= usb_alloc_urb(u
->packets
, GFP_KERNEL
);
1040 u
->urb
->transfer_buffer
=
1041 usb_buffer_alloc(subs
->dev
, u
->buffer_size
, GFP_KERNEL
,
1042 &u
->urb
->transfer_dma
);
1043 if (! u
->urb
->transfer_buffer
)
1045 u
->urb
->pipe
= subs
->datapipe
;
1046 u
->urb
->transfer_flags
= URB_ISO_ASAP
| URB_NO_TRANSFER_DMA_MAP
;
1047 u
->urb
->interval
= 1 << subs
->datainterval
;
1048 u
->urb
->context
= u
;
1049 u
->urb
->complete
= snd_usb_complete_callback(snd_complete_urb
);
1052 if (subs
->syncpipe
) {
1053 /* allocate and initialize sync urbs */
1054 subs
->syncbuf
= usb_buffer_alloc(subs
->dev
, SYNC_URBS
* 4,
1055 GFP_KERNEL
, &subs
->sync_dma
);
1056 if (! subs
->syncbuf
)
1058 for (i
= 0; i
< SYNC_URBS
; i
++) {
1059 snd_urb_ctx_t
*u
= &subs
->syncurb
[i
];
1063 u
->urb
= usb_alloc_urb(1, GFP_KERNEL
);
1066 u
->urb
->transfer_buffer
= subs
->syncbuf
+ i
* 4;
1067 u
->urb
->transfer_dma
= subs
->sync_dma
+ i
* 4;
1068 u
->urb
->transfer_buffer_length
= 4;
1069 u
->urb
->pipe
= subs
->syncpipe
;
1070 u
->urb
->transfer_flags
= URB_ISO_ASAP
|
1071 URB_NO_TRANSFER_DMA_MAP
;
1072 u
->urb
->number_of_packets
= 1;
1073 u
->urb
->interval
= 1 << subs
->syncinterval
;
1074 u
->urb
->context
= u
;
1075 u
->urb
->complete
= snd_usb_complete_callback(snd_complete_sync_urb
);
1081 release_substream_urbs(subs
, 0);
1087 * find a matching audio format
1089 static struct audioformat
*find_format(snd_usb_substream_t
*subs
, unsigned int format
,
1090 unsigned int rate
, unsigned int channels
)
1092 struct list_head
*p
;
1093 struct audioformat
*found
= NULL
;
1094 int cur_attr
= 0, attr
;
1096 list_for_each(p
, &subs
->fmt_list
) {
1097 struct audioformat
*fp
;
1098 fp
= list_entry(p
, struct audioformat
, list
);
1099 if (fp
->format
!= format
|| fp
->channels
!= channels
)
1101 if (rate
< fp
->rate_min
|| rate
> fp
->rate_max
)
1103 if (! (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)) {
1105 for (i
= 0; i
< fp
->nr_rates
; i
++)
1106 if (fp
->rate_table
[i
] == rate
)
1108 if (i
>= fp
->nr_rates
)
1111 attr
= fp
->ep_attr
& EP_ATTR_MASK
;
1117 /* avoid async out and adaptive in if the other method
1118 * supports the same format.
1119 * this is a workaround for the case like
1120 * M-audio audiophile USB.
1122 if (attr
!= cur_attr
) {
1123 if ((attr
== EP_ATTR_ASYNC
&&
1124 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1125 (attr
== EP_ATTR_ADAPTIVE
&&
1126 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
))
1128 if ((cur_attr
== EP_ATTR_ASYNC
&&
1129 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1130 (cur_attr
== EP_ATTR_ADAPTIVE
&&
1131 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
)) {
1137 /* find the format with the largest max. packet size */
1138 if (fp
->maxpacksize
> found
->maxpacksize
) {
1148 * initialize the picth control and sample rate
1150 static int init_usb_pitch(struct usb_device
*dev
, int iface
,
1151 struct usb_host_interface
*alts
,
1152 struct audioformat
*fmt
)
1155 unsigned char data
[1];
1158 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1159 /* if endpoint has pitch control, enable it */
1160 if (fmt
->attributes
& EP_CS_ATTR_PITCH_CONTROL
) {
1162 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1163 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1164 PITCH_CONTROL
<< 8, ep
, data
, 1, 1000)) < 0) {
1165 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH\n",
1166 dev
->devnum
, iface
, ep
);
1173 static int init_usb_sample_rate(struct usb_device
*dev
, int iface
,
1174 struct usb_host_interface
*alts
,
1175 struct audioformat
*fmt
, int rate
)
1178 unsigned char data
[3];
1181 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1182 /* if endpoint has sampling rate control, set it */
1183 if (fmt
->attributes
& EP_CS_ATTR_SAMPLE_RATE
) {
1186 data
[1] = rate
>> 8;
1187 data
[2] = rate
>> 16;
1188 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1189 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1190 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1191 snd_printk(KERN_ERR
"%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1192 dev
->devnum
, iface
, fmt
->altsetting
, rate
, ep
);
1195 if ((err
= snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), GET_CUR
,
1196 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_IN
,
1197 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1198 snd_printk(KERN_WARNING
"%d:%d:%d: cannot get freq at ep 0x%x\n",
1199 dev
->devnum
, iface
, fmt
->altsetting
, ep
);
1200 return 0; /* some devices don't support reading */
1202 crate
= data
[0] | (data
[1] << 8) | (data
[2] << 16);
1203 if (crate
!= rate
) {
1204 snd_printd(KERN_WARNING
"current rate %d is different from the runtime rate %d\n", crate
, rate
);
1205 // runtime->rate = crate;
1212 * find a matching format and set up the interface
1214 static int set_format(snd_usb_substream_t
*subs
, struct audioformat
*fmt
)
1216 struct usb_device
*dev
= subs
->dev
;
1217 struct usb_host_interface
*alts
;
1218 struct usb_interface_descriptor
*altsd
;
1219 struct usb_interface
*iface
;
1220 unsigned int ep
, attr
;
1221 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
1224 iface
= usb_ifnum_to_if(dev
, fmt
->iface
);
1225 snd_assert(iface
, return -EINVAL
);
1226 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1227 altsd
= get_iface_desc(alts
);
1228 snd_assert(altsd
->bAlternateSetting
== fmt
->altsetting
, return -EINVAL
);
1230 if (fmt
== subs
->cur_audiofmt
)
1233 /* close the old interface */
1234 if (subs
->interface
>= 0 && subs
->interface
!= fmt
->iface
) {
1235 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1236 subs
->interface
= -1;
1241 if (subs
->interface
!= fmt
->iface
|| subs
->format
!= fmt
->altset_idx
) {
1242 if (usb_set_interface(dev
, fmt
->iface
, fmt
->altsetting
) < 0) {
1243 snd_printk(KERN_ERR
"%d:%d:%d: usb_set_interface failed\n",
1244 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1247 snd_printdd(KERN_INFO
"setting usb interface %d:%d\n", fmt
->iface
, fmt
->altsetting
);
1248 subs
->interface
= fmt
->iface
;
1249 subs
->format
= fmt
->altset_idx
;
1252 /* create a data pipe */
1253 ep
= fmt
->endpoint
& USB_ENDPOINT_NUMBER_MASK
;
1255 subs
->datapipe
= usb_sndisocpipe(dev
, ep
);
1257 subs
->datapipe
= usb_rcvisocpipe(dev
, ep
);
1258 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
&&
1259 get_endpoint(alts
, 0)->bInterval
>= 1 &&
1260 get_endpoint(alts
, 0)->bInterval
<= 4)
1261 subs
->datainterval
= get_endpoint(alts
, 0)->bInterval
- 1;
1263 subs
->datainterval
= 0;
1264 subs
->syncpipe
= subs
->syncinterval
= 0;
1265 subs
->maxpacksize
= fmt
->maxpacksize
;
1268 /* we need a sync pipe in async OUT or adaptive IN mode */
1269 /* check the number of EP, since some devices have broken
1270 * descriptors which fool us. if it has only one EP,
1271 * assume it as adaptive-out or sync-in.
1273 attr
= fmt
->ep_attr
& EP_ATTR_MASK
;
1274 if (((is_playback
&& attr
== EP_ATTR_ASYNC
) ||
1275 (! is_playback
&& attr
== EP_ATTR_ADAPTIVE
)) &&
1276 altsd
->bNumEndpoints
>= 2) {
1277 /* check sync-pipe endpoint */
1278 /* ... and check descriptor size before accessing bSynchAddress
1279 because there is a version of the SB Audigy 2 NX firmware lacking
1280 the audio fields in the endpoint descriptors */
1281 if ((get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) != 0x01 ||
1282 (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1283 get_endpoint(alts
, 1)->bSynchAddress
!= 0)) {
1284 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1285 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1288 ep
= get_endpoint(alts
, 1)->bEndpointAddress
;
1289 if (get_endpoint(alts
, 0)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1290 (( is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
| USB_DIR_IN
)) ||
1291 (!is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
& ~USB_DIR_IN
)))) {
1292 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1293 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1296 ep
&= USB_ENDPOINT_NUMBER_MASK
;
1298 subs
->syncpipe
= usb_rcvisocpipe(dev
, ep
);
1300 subs
->syncpipe
= usb_sndisocpipe(dev
, ep
);
1301 if (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1302 get_endpoint(alts
, 1)->bRefresh
>= 1 &&
1303 get_endpoint(alts
, 1)->bRefresh
<= 9)
1304 subs
->syncinterval
= get_endpoint(alts
, 1)->bRefresh
;
1305 else if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
1306 subs
->syncinterval
= 1;
1307 else if (get_endpoint(alts
, 1)->bInterval
>= 1 &&
1308 get_endpoint(alts
, 1)->bInterval
<= 16)
1309 subs
->syncinterval
= get_endpoint(alts
, 1)->bInterval
- 1;
1311 subs
->syncinterval
= 3;
1314 /* always fill max packet size */
1315 if (fmt
->attributes
& EP_CS_ATTR_FILL_MAX
)
1318 if ((err
= init_usb_pitch(dev
, subs
->interface
, alts
, fmt
)) < 0)
1321 subs
->cur_audiofmt
= fmt
;
1324 printk("setting done: format = %d, rate = %d, channels = %d\n",
1325 fmt
->format
, fmt
->rate
, fmt
->channels
);
1326 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1327 subs
->datapipe
, subs
->syncpipe
);
1334 * hw_params callback
1336 * allocate a buffer and set the given audio format.
1338 * so far we use a physically linear buffer although packetize transfer
1339 * doesn't need a continuous area.
1340 * if sg buffer is supported on the later version of alsa, we'll follow
1343 static int snd_usb_hw_params(snd_pcm_substream_t
*substream
,
1344 snd_pcm_hw_params_t
*hw_params
)
1346 snd_usb_substream_t
*subs
= (snd_usb_substream_t
*)substream
->runtime
->private_data
;
1347 struct audioformat
*fmt
;
1348 unsigned int channels
, rate
, format
;
1351 ret
= snd_pcm_alloc_vmalloc_buffer(substream
,
1352 params_buffer_bytes(hw_params
));
1356 format
= params_format(hw_params
);
1357 rate
= params_rate(hw_params
);
1358 channels
= params_channels(hw_params
);
1359 fmt
= find_format(subs
, format
, rate
, channels
);
1361 snd_printd(KERN_DEBUG
"cannot set format: format = %s, rate = %d, channels = %d\n",
1362 snd_pcm_format_name(format
), rate
, channels
);
1366 changed
= subs
->cur_audiofmt
!= fmt
||
1367 subs
->period_bytes
!= params_period_bytes(hw_params
) ||
1368 subs
->cur_rate
!= rate
;
1369 if ((ret
= set_format(subs
, fmt
)) < 0)
1372 if (subs
->cur_rate
!= rate
) {
1373 struct usb_host_interface
*alts
;
1374 struct usb_interface
*iface
;
1375 iface
= usb_ifnum_to_if(subs
->dev
, fmt
->iface
);
1376 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1377 ret
= init_usb_sample_rate(subs
->dev
, subs
->interface
, alts
, fmt
, rate
);
1380 subs
->cur_rate
= rate
;
1384 /* format changed */
1385 release_substream_urbs(subs
, 0);
1386 /* influenced: period_bytes, channels, rate, format, */
1387 ret
= init_substream_urbs(subs
, params_period_bytes(hw_params
),
1388 params_rate(hw_params
),
1389 snd_pcm_format_physical_width(params_format(hw_params
)) * params_channels(hw_params
));
1398 * reset the audio format and release the buffer
1400 static int snd_usb_hw_free(snd_pcm_substream_t
*substream
)
1402 snd_usb_substream_t
*subs
= (snd_usb_substream_t
*)substream
->runtime
->private_data
;
1404 subs
->cur_audiofmt
= NULL
;
1406 subs
->period_bytes
= 0;
1407 release_substream_urbs(subs
, 0);
1408 return snd_pcm_free_vmalloc_buffer(substream
);
1414 * only a few subtle things...
1416 static int snd_usb_pcm_prepare(snd_pcm_substream_t
*substream
)
1418 snd_pcm_runtime_t
*runtime
= substream
->runtime
;
1419 snd_usb_substream_t
*subs
= (snd_usb_substream_t
*)runtime
->private_data
;
1421 if (! subs
->cur_audiofmt
) {
1422 snd_printk(KERN_ERR
"usbaudio: no format is specified!\n");
1426 /* some unit conversions in runtime */
1427 subs
->maxframesize
= bytes_to_frames(runtime
, subs
->maxpacksize
);
1428 subs
->curframesize
= bytes_to_frames(runtime
, subs
->curpacksize
);
1430 /* reset the pointer */
1431 subs
->hwptr_done
= 0;
1432 subs
->transfer_done
= 0;
1435 /* clear urbs (to be sure) */
1436 deactivate_urbs(subs
, 0, 1);
1437 wait_clear_urbs(subs
);
1442 static snd_pcm_hardware_t snd_usb_playback
=
1444 .info
= (SNDRV_PCM_INFO_MMAP
| SNDRV_PCM_INFO_INTERLEAVED
|
1445 SNDRV_PCM_INFO_BLOCK_TRANSFER
|
1446 SNDRV_PCM_INFO_MMAP_VALID
),
1447 .buffer_bytes_max
= (256*1024),
1448 .period_bytes_min
= 64,
1449 .period_bytes_max
= (128*1024),
1451 .periods_max
= 1024,
1454 static snd_pcm_hardware_t snd_usb_capture
=
1456 .info
= (SNDRV_PCM_INFO_MMAP
| SNDRV_PCM_INFO_INTERLEAVED
|
1457 SNDRV_PCM_INFO_BLOCK_TRANSFER
|
1458 SNDRV_PCM_INFO_MMAP_VALID
),
1459 .buffer_bytes_max
= (256*1024),
1460 .period_bytes_min
= 64,
1461 .period_bytes_max
= (128*1024),
1463 .periods_max
= 1024,
1470 #ifdef HW_CONST_DEBUG
1471 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1473 #define hwc_debug(fmt, args...) /**/
1476 static int hw_check_valid_format(snd_pcm_hw_params_t
*params
, struct audioformat
*fp
)
1478 snd_interval_t
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1479 snd_interval_t
*ct
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1480 snd_mask_t
*fmts
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1482 /* check the format */
1483 if (! snd_mask_test(fmts
, fp
->format
)) {
1484 hwc_debug(" > check: no supported format %d\n", fp
->format
);
1487 /* check the channels */
1488 if (fp
->channels
< ct
->min
|| fp
->channels
> ct
->max
) {
1489 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp
->channels
, ct
->min
, ct
->max
);
1492 /* check the rate is within the range */
1493 if (fp
->rate_min
> it
->max
|| (fp
->rate_min
== it
->max
&& it
->openmax
)) {
1494 hwc_debug(" > check: rate_min %d > max %d\n", fp
->rate_min
, it
->max
);
1497 if (fp
->rate_max
< it
->min
|| (fp
->rate_max
== it
->min
&& it
->openmin
)) {
1498 hwc_debug(" > check: rate_max %d < min %d\n", fp
->rate_max
, it
->min
);
1504 static int hw_rule_rate(snd_pcm_hw_params_t
*params
,
1505 snd_pcm_hw_rule_t
*rule
)
1507 snd_usb_substream_t
*subs
= rule
->private;
1508 struct list_head
*p
;
1509 snd_interval_t
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1510 unsigned int rmin
, rmax
;
1513 hwc_debug("hw_rule_rate: (%d,%d)\n", it
->min
, it
->max
);
1516 list_for_each(p
, &subs
->fmt_list
) {
1517 struct audioformat
*fp
;
1518 fp
= list_entry(p
, struct audioformat
, list
);
1519 if (! hw_check_valid_format(params
, fp
))
1522 if (rmin
> fp
->rate_min
)
1523 rmin
= fp
->rate_min
;
1524 if (rmax
< fp
->rate_max
)
1525 rmax
= fp
->rate_max
;
1527 rmin
= fp
->rate_min
;
1528 rmax
= fp
->rate_max
;
1533 hwc_debug(" --> get empty\n");
1539 if (it
->min
< rmin
) {
1544 if (it
->max
> rmax
) {
1549 if (snd_interval_checkempty(it
)) {
1553 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1558 static int hw_rule_channels(snd_pcm_hw_params_t
*params
,
1559 snd_pcm_hw_rule_t
*rule
)
1561 snd_usb_substream_t
*subs
= rule
->private;
1562 struct list_head
*p
;
1563 snd_interval_t
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1564 unsigned int rmin
, rmax
;
1567 hwc_debug("hw_rule_channels: (%d,%d)\n", it
->min
, it
->max
);
1570 list_for_each(p
, &subs
->fmt_list
) {
1571 struct audioformat
*fp
;
1572 fp
= list_entry(p
, struct audioformat
, list
);
1573 if (! hw_check_valid_format(params
, fp
))
1576 if (rmin
> fp
->channels
)
1577 rmin
= fp
->channels
;
1578 if (rmax
< fp
->channels
)
1579 rmax
= fp
->channels
;
1581 rmin
= fp
->channels
;
1582 rmax
= fp
->channels
;
1587 hwc_debug(" --> get empty\n");
1593 if (it
->min
< rmin
) {
1598 if (it
->max
> rmax
) {
1603 if (snd_interval_checkempty(it
)) {
1607 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1611 static int hw_rule_format(snd_pcm_hw_params_t
*params
,
1612 snd_pcm_hw_rule_t
*rule
)
1614 snd_usb_substream_t
*subs
= rule
->private;
1615 struct list_head
*p
;
1616 snd_mask_t
*fmt
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1621 hwc_debug("hw_rule_format: %x:%x\n", fmt
->bits
[0], fmt
->bits
[1]);
1623 list_for_each(p
, &subs
->fmt_list
) {
1624 struct audioformat
*fp
;
1625 fp
= list_entry(p
, struct audioformat
, list
);
1626 if (! hw_check_valid_format(params
, fp
))
1628 fbits
|= (1ULL << fp
->format
);
1631 oldbits
[0] = fmt
->bits
[0];
1632 oldbits
[1] = fmt
->bits
[1];
1633 fmt
->bits
[0] &= (u32
)fbits
;
1634 fmt
->bits
[1] &= (u32
)(fbits
>> 32);
1635 if (! fmt
->bits
[0] && ! fmt
->bits
[1]) {
1636 hwc_debug(" --> get empty\n");
1639 changed
= (oldbits
[0] != fmt
->bits
[0] || oldbits
[1] != fmt
->bits
[1]);
1640 hwc_debug(" --> %x:%x (changed = %d)\n", fmt
->bits
[0], fmt
->bits
[1], changed
);
1647 * check whether the registered audio formats need special hw-constraints
1649 static int check_hw_params_convention(snd_usb_substream_t
*subs
)
1654 u32 cmaster
, rmaster
;
1655 u32 rate_min
= 0, rate_max
= 0;
1656 struct list_head
*p
;
1659 channels
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1660 rates
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1662 list_for_each(p
, &subs
->fmt_list
) {
1663 struct audioformat
*f
;
1664 f
= list_entry(p
, struct audioformat
, list
);
1665 /* unconventional channels? */
1666 if (f
->channels
> 32)
1668 /* continuous rate min/max matches? */
1669 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1670 if (rate_min
&& f
->rate_min
!= rate_min
)
1672 if (rate_max
&& f
->rate_max
!= rate_max
)
1674 rate_min
= f
->rate_min
;
1675 rate_max
= f
->rate_max
;
1677 /* combination of continuous rates and fixed rates? */
1678 if (rates
[f
->format
] & SNDRV_PCM_RATE_CONTINUOUS
) {
1679 if (f
->rates
!= rates
[f
->format
])
1682 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1683 if (rates
[f
->format
] && rates
[f
->format
] != f
->rates
)
1686 channels
[f
->format
] |= (1 << f
->channels
);
1687 rates
[f
->format
] |= f
->rates
;
1689 /* check whether channels and rates match for all formats */
1690 cmaster
= rmaster
= 0;
1691 for (i
= 0; i
< MAX_MASK
; i
++) {
1692 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1694 if (rmaster
!= rates
[i
] && rmaster
&& rates
[i
])
1697 cmaster
= channels
[i
];
1701 /* check whether channels match for all distinct rates */
1702 memset(channels
, 0, MAX_MASK
* sizeof(u32
));
1703 list_for_each(p
, &subs
->fmt_list
) {
1704 struct audioformat
*f
;
1705 f
= list_entry(p
, struct audioformat
, list
);
1706 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)
1708 for (i
= 0; i
< 32; i
++) {
1709 if (f
->rates
& (1 << i
))
1710 channels
[i
] |= (1 << f
->channels
);
1714 for (i
= 0; i
< 32; i
++) {
1715 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1718 cmaster
= channels
[i
];
1730 * set up the runtime hardware information.
1733 static int setup_hw_info(snd_pcm_runtime_t
*runtime
, snd_usb_substream_t
*subs
)
1735 struct list_head
*p
;
1738 runtime
->hw
.formats
= subs
->formats
;
1740 runtime
->hw
.rate_min
= 0x7fffffff;
1741 runtime
->hw
.rate_max
= 0;
1742 runtime
->hw
.channels_min
= 256;
1743 runtime
->hw
.channels_max
= 0;
1744 runtime
->hw
.rates
= 0;
1745 /* check min/max rates and channels */
1746 list_for_each(p
, &subs
->fmt_list
) {
1747 struct audioformat
*fp
;
1748 fp
= list_entry(p
, struct audioformat
, list
);
1749 runtime
->hw
.rates
|= fp
->rates
;
1750 if (runtime
->hw
.rate_min
> fp
->rate_min
)
1751 runtime
->hw
.rate_min
= fp
->rate_min
;
1752 if (runtime
->hw
.rate_max
< fp
->rate_max
)
1753 runtime
->hw
.rate_max
= fp
->rate_max
;
1754 if (runtime
->hw
.channels_min
> fp
->channels
)
1755 runtime
->hw
.channels_min
= fp
->channels
;
1756 if (runtime
->hw
.channels_max
< fp
->channels
)
1757 runtime
->hw
.channels_max
= fp
->channels
;
1758 if (fp
->fmt_type
== USB_FORMAT_TYPE_II
&& fp
->frame_size
> 0) {
1759 /* FIXME: there might be more than one audio formats... */
1760 runtime
->hw
.period_bytes_min
= runtime
->hw
.period_bytes_max
=
1765 /* set the period time minimum 1ms */
1766 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1767 1000 * MIN_PACKS_URB
,
1768 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX
);
1770 if (check_hw_params_convention(subs
)) {
1771 hwc_debug("setting extra hw constraints...\n");
1772 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1774 SNDRV_PCM_HW_PARAM_FORMAT
,
1775 SNDRV_PCM_HW_PARAM_CHANNELS
,
1778 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1779 hw_rule_channels
, subs
,
1780 SNDRV_PCM_HW_PARAM_FORMAT
,
1781 SNDRV_PCM_HW_PARAM_RATE
,
1784 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1785 hw_rule_format
, subs
,
1786 SNDRV_PCM_HW_PARAM_RATE
,
1787 SNDRV_PCM_HW_PARAM_CHANNELS
,
1794 static int snd_usb_pcm_open(snd_pcm_substream_t
*substream
, int direction
,
1795 snd_pcm_hardware_t
*hw
)
1797 snd_usb_stream_t
*as
= snd_pcm_substream_chip(substream
);
1798 snd_pcm_runtime_t
*runtime
= substream
->runtime
;
1799 snd_usb_substream_t
*subs
= &as
->substream
[direction
];
1801 subs
->interface
= -1;
1804 runtime
->private_data
= subs
;
1805 subs
->pcm_substream
= substream
;
1806 return setup_hw_info(runtime
, subs
);
1809 static int snd_usb_pcm_close(snd_pcm_substream_t
*substream
, int direction
)
1811 snd_usb_stream_t
*as
= snd_pcm_substream_chip(substream
);
1812 snd_usb_substream_t
*subs
= &as
->substream
[direction
];
1814 if (subs
->interface
>= 0) {
1815 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1816 subs
->interface
= -1;
1818 subs
->pcm_substream
= NULL
;
1822 static int snd_usb_playback_open(snd_pcm_substream_t
*substream
)
1824 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_PLAYBACK
, &snd_usb_playback
);
1827 static int snd_usb_playback_close(snd_pcm_substream_t
*substream
)
1829 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
1832 static int snd_usb_capture_open(snd_pcm_substream_t
*substream
)
1834 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_CAPTURE
, &snd_usb_capture
);
1837 static int snd_usb_capture_close(snd_pcm_substream_t
*substream
)
1839 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_CAPTURE
);
1842 static snd_pcm_ops_t snd_usb_playback_ops
= {
1843 .open
= snd_usb_playback_open
,
1844 .close
= snd_usb_playback_close
,
1845 .ioctl
= snd_pcm_lib_ioctl
,
1846 .hw_params
= snd_usb_hw_params
,
1847 .hw_free
= snd_usb_hw_free
,
1848 .prepare
= snd_usb_pcm_prepare
,
1849 .trigger
= snd_usb_pcm_trigger
,
1850 .pointer
= snd_usb_pcm_pointer
,
1851 .page
= snd_pcm_get_vmalloc_page
,
1854 static snd_pcm_ops_t snd_usb_capture_ops
= {
1855 .open
= snd_usb_capture_open
,
1856 .close
= snd_usb_capture_close
,
1857 .ioctl
= snd_pcm_lib_ioctl
,
1858 .hw_params
= snd_usb_hw_params
,
1859 .hw_free
= snd_usb_hw_free
,
1860 .prepare
= snd_usb_pcm_prepare
,
1861 .trigger
= snd_usb_pcm_trigger
,
1862 .pointer
= snd_usb_pcm_pointer
,
1863 .page
= snd_pcm_get_vmalloc_page
,
1873 * combine bytes and get an integer value
1875 unsigned int snd_usb_combine_bytes(unsigned char *bytes
, int size
)
1878 case 1: return *bytes
;
1879 case 2: return combine_word(bytes
);
1880 case 3: return combine_triple(bytes
);
1881 case 4: return combine_quad(bytes
);
1887 * parse descriptor buffer and return the pointer starting the given
1890 void *snd_usb_find_desc(void *descstart
, int desclen
, void *after
, u8 dtype
)
1902 if (p
[1] == dtype
&& (!after
|| (void *)p
> after
)) {
1911 * find a class-specified interface descriptor with the given subtype.
1913 void *snd_usb_find_csint_desc(void *buffer
, int buflen
, void *after
, u8 dsubtype
)
1915 unsigned char *p
= after
;
1917 while ((p
= snd_usb_find_desc(buffer
, buflen
, p
,
1918 USB_DT_CS_INTERFACE
)) != NULL
) {
1919 if (p
[0] >= 3 && p
[2] == dsubtype
)
1926 * Wrapper for usb_control_msg().
1927 * Allocates a temp buffer to prevent dmaing from/to the stack.
1929 int snd_usb_ctl_msg(struct usb_device
*dev
, unsigned int pipe
, __u8 request
,
1930 __u8 requesttype
, __u16 value
, __u16 index
, void *data
,
1931 __u16 size
, int timeout
)
1937 buf
= kmalloc(size
, GFP_KERNEL
);
1940 memcpy(buf
, data
, size
);
1942 err
= usb_control_msg(dev
, pipe
, request
, requesttype
,
1943 value
, index
, buf
, size
, timeout
);
1945 memcpy(data
, buf
, size
);
1953 * entry point for linux usb interface
1956 static int usb_audio_probe(struct usb_interface
*intf
,
1957 const struct usb_device_id
*id
);
1958 static void usb_audio_disconnect(struct usb_interface
*intf
);
1960 static struct usb_device_id usb_audio_ids
[] = {
1961 #include "usbquirks.h"
1962 { .match_flags
= (USB_DEVICE_ID_MATCH_INT_CLASS
| USB_DEVICE_ID_MATCH_INT_SUBCLASS
),
1963 .bInterfaceClass
= USB_CLASS_AUDIO
,
1964 .bInterfaceSubClass
= USB_SUBCLASS_AUDIO_CONTROL
},
1965 { } /* Terminating entry */
1968 MODULE_DEVICE_TABLE (usb
, usb_audio_ids
);
1970 static struct usb_driver usb_audio_driver
= {
1971 .owner
= THIS_MODULE
,
1972 .name
= "snd-usb-audio",
1973 .probe
= usb_audio_probe
,
1974 .disconnect
= usb_audio_disconnect
,
1975 .id_table
= usb_audio_ids
,
1980 * proc interface for list the supported pcm formats
1982 static void proc_dump_substream_formats(snd_usb_substream_t
*subs
, snd_info_buffer_t
*buffer
)
1984 struct list_head
*p
;
1985 static char *sync_types
[4] = {
1986 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
1989 list_for_each(p
, &subs
->fmt_list
) {
1990 struct audioformat
*fp
;
1991 fp
= list_entry(p
, struct audioformat
, list
);
1992 snd_iprintf(buffer
, " Interface %d\n", fp
->iface
);
1993 snd_iprintf(buffer
, " Altset %d\n", fp
->altsetting
);
1994 snd_iprintf(buffer
, " Format: %s\n", snd_pcm_format_name(fp
->format
));
1995 snd_iprintf(buffer
, " Channels: %d\n", fp
->channels
);
1996 snd_iprintf(buffer
, " Endpoint: %d %s (%s)\n",
1997 fp
->endpoint
& USB_ENDPOINT_NUMBER_MASK
,
1998 fp
->endpoint
& USB_DIR_IN
? "IN" : "OUT",
1999 sync_types
[(fp
->ep_attr
& EP_ATTR_MASK
) >> 2]);
2000 if (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
2001 snd_iprintf(buffer
, " Rates: %d - %d (continuous)\n",
2002 fp
->rate_min
, fp
->rate_max
);
2005 snd_iprintf(buffer
, " Rates: ");
2006 for (i
= 0; i
< fp
->nr_rates
; i
++) {
2008 snd_iprintf(buffer
, ", ");
2009 snd_iprintf(buffer
, "%d", fp
->rate_table
[i
]);
2011 snd_iprintf(buffer
, "\n");
2013 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2014 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2018 static void proc_dump_substream_status(snd_usb_substream_t
*subs
, snd_info_buffer_t
*buffer
)
2020 if (subs
->running
) {
2022 snd_iprintf(buffer
, " Status: Running\n");
2023 snd_iprintf(buffer
, " Interface = %d\n", subs
->interface
);
2024 snd_iprintf(buffer
, " Altset = %d\n", subs
->format
);
2025 snd_iprintf(buffer
, " URBs = %d [ ", subs
->nurbs
);
2026 for (i
= 0; i
< subs
->nurbs
; i
++)
2027 snd_iprintf(buffer
, "%d ", subs
->dataurb
[i
].packets
);
2028 snd_iprintf(buffer
, "]\n");
2029 snd_iprintf(buffer
, " Packet Size = %d\n", subs
->curpacksize
);
2030 snd_iprintf(buffer
, " Momentary freq = %u Hz (%#x.%04x)\n",
2031 snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
2032 ? get_full_speed_hz(subs
->freqm
)
2033 : get_high_speed_hz(subs
->freqm
),
2034 subs
->freqm
>> 16, subs
->freqm
& 0xffff);
2036 snd_iprintf(buffer
, " Status: Stop\n");
2040 static void proc_pcm_format_read(snd_info_entry_t
*entry
, snd_info_buffer_t
*buffer
)
2042 snd_usb_stream_t
*stream
= entry
->private_data
;
2044 snd_iprintf(buffer
, "%s : %s\n", stream
->chip
->card
->longname
, stream
->pcm
->name
);
2046 if (stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
].num_formats
) {
2047 snd_iprintf(buffer
, "\nPlayback:\n");
2048 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2049 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2051 if (stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
].num_formats
) {
2052 snd_iprintf(buffer
, "\nCapture:\n");
2053 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2054 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2058 static void proc_pcm_format_add(snd_usb_stream_t
*stream
)
2060 snd_info_entry_t
*entry
;
2062 snd_card_t
*card
= stream
->chip
->card
;
2064 sprintf(name
, "stream%d", stream
->pcm_index
);
2065 if (! snd_card_proc_new(card
, name
, &entry
))
2066 snd_info_set_text_ops(entry
, stream
, 1024, proc_pcm_format_read
);
2071 * initialize the substream instance.
2074 static void init_substream(snd_usb_stream_t
*as
, int stream
, struct audioformat
*fp
)
2076 snd_usb_substream_t
*subs
= &as
->substream
[stream
];
2078 INIT_LIST_HEAD(&subs
->fmt_list
);
2079 spin_lock_init(&subs
->lock
);
2080 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2081 tasklet_init(&subs
->start_period_elapsed
, start_period_elapsed
,
2082 (unsigned long)subs
);
2085 subs
->direction
= stream
;
2086 subs
->dev
= as
->chip
->dev
;
2087 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
2088 subs
->ops
= audio_urb_ops
[stream
];
2090 subs
->ops
= audio_urb_ops_high_speed
[stream
];
2091 snd_pcm_set_ops(as
->pcm
, stream
,
2092 stream
== SNDRV_PCM_STREAM_PLAYBACK
?
2093 &snd_usb_playback_ops
: &snd_usb_capture_ops
);
2095 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2096 subs
->formats
|= 1ULL << fp
->format
;
2097 subs
->endpoint
= fp
->endpoint
;
2098 subs
->num_formats
++;
2099 subs
->fmt_type
= fp
->fmt_type
;
2106 static void free_substream(snd_usb_substream_t
*subs
)
2108 struct list_head
*p
, *n
;
2110 if (! subs
->num_formats
)
2111 return; /* not initialized */
2112 list_for_each_safe(p
, n
, &subs
->fmt_list
) {
2113 struct audioformat
*fp
= list_entry(p
, struct audioformat
, list
);
2114 kfree(fp
->rate_table
);
2121 * free a usb stream instance
2123 static void snd_usb_audio_stream_free(snd_usb_stream_t
*stream
)
2125 free_substream(&stream
->substream
[0]);
2126 free_substream(&stream
->substream
[1]);
2127 list_del(&stream
->list
);
2131 static void snd_usb_audio_pcm_free(snd_pcm_t
*pcm
)
2133 snd_usb_stream_t
*stream
= pcm
->private_data
;
2136 snd_usb_audio_stream_free(stream
);
2142 * add this endpoint to the chip instance.
2143 * if a stream with the same endpoint already exists, append to it.
2144 * if not, create a new pcm stream.
2146 static int add_audio_endpoint(snd_usb_audio_t
*chip
, int stream
, struct audioformat
*fp
)
2148 struct list_head
*p
;
2149 snd_usb_stream_t
*as
;
2150 snd_usb_substream_t
*subs
;
2154 list_for_each(p
, &chip
->pcm_list
) {
2155 as
= list_entry(p
, snd_usb_stream_t
, list
);
2156 if (as
->fmt_type
!= fp
->fmt_type
)
2158 subs
= &as
->substream
[stream
];
2159 if (! subs
->endpoint
)
2161 if (subs
->endpoint
== fp
->endpoint
) {
2162 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2163 subs
->num_formats
++;
2164 subs
->formats
|= 1ULL << fp
->format
;
2168 /* look for an empty stream */
2169 list_for_each(p
, &chip
->pcm_list
) {
2170 as
= list_entry(p
, snd_usb_stream_t
, list
);
2171 if (as
->fmt_type
!= fp
->fmt_type
)
2173 subs
= &as
->substream
[stream
];
2176 err
= snd_pcm_new_stream(as
->pcm
, stream
, 1);
2179 init_substream(as
, stream
, fp
);
2183 /* create a new pcm */
2184 as
= kmalloc(sizeof(*as
), GFP_KERNEL
);
2187 memset(as
, 0, sizeof(*as
));
2188 as
->pcm_index
= chip
->pcm_devs
;
2190 as
->fmt_type
= fp
->fmt_type
;
2191 err
= snd_pcm_new(chip
->card
, "USB Audio", chip
->pcm_devs
,
2192 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 1 : 0,
2193 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 0 : 1,
2200 pcm
->private_data
= as
;
2201 pcm
->private_free
= snd_usb_audio_pcm_free
;
2202 pcm
->info_flags
= 0;
2203 if (chip
->pcm_devs
> 0)
2204 sprintf(pcm
->name
, "USB Audio #%d", chip
->pcm_devs
);
2206 strcpy(pcm
->name
, "USB Audio");
2208 init_substream(as
, stream
, fp
);
2210 list_add(&as
->list
, &chip
->pcm_list
);
2213 proc_pcm_format_add(as
);
2220 * check if the device uses big-endian samples
2222 static int is_big_endian_format(snd_usb_audio_t
*chip
, struct audioformat
*fp
)
2224 switch (chip
->usb_id
) {
2225 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2226 if (fp
->endpoint
& USB_DIR_IN
)
2229 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2236 * parse the audio format type I descriptor
2237 * and returns the corresponding pcm format
2240 * @fp: audioformat record
2241 * @format: the format tag (wFormatTag)
2242 * @fmt: the format type descriptor
2244 static int parse_audio_format_i_type(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2245 int format
, unsigned char *fmt
)
2248 int sample_width
, sample_bytes
;
2250 /* FIXME: correct endianess and sign? */
2252 sample_width
= fmt
[6];
2253 sample_bytes
= fmt
[5];
2255 case 0: /* some devices don't define this correctly... */
2256 snd_printdd(KERN_INFO
"%d:%u:%d : format type 0 is detected, processed as PCM\n",
2257 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2259 case USB_AUDIO_FORMAT_PCM
:
2260 if (sample_width
> sample_bytes
* 8) {
2261 snd_printk(KERN_INFO
"%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2262 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
,
2263 sample_width
, sample_bytes
);
2265 /* check the format byte size */
2268 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2271 if (is_big_endian_format(chip
, fp
))
2272 pcm_format
= SNDRV_PCM_FORMAT_S16_BE
; /* grrr, big endian!! */
2274 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2277 if (is_big_endian_format(chip
, fp
))
2278 pcm_format
= SNDRV_PCM_FORMAT_S24_3BE
; /* grrr, big endian!! */
2280 pcm_format
= SNDRV_PCM_FORMAT_S24_3LE
;
2283 pcm_format
= SNDRV_PCM_FORMAT_S32_LE
;
2286 snd_printk(KERN_INFO
"%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2287 chip
->dev
->devnum
, fp
->iface
,
2288 fp
->altsetting
, sample_width
, sample_bytes
);
2292 case USB_AUDIO_FORMAT_PCM8
:
2293 /* Dallas DS4201 workaround */
2294 if (chip
->usb_id
== USB_ID(0x04fa, 0x4201))
2295 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2297 pcm_format
= SNDRV_PCM_FORMAT_U8
;
2299 case USB_AUDIO_FORMAT_IEEE_FLOAT
:
2300 pcm_format
= SNDRV_PCM_FORMAT_FLOAT_LE
;
2302 case USB_AUDIO_FORMAT_ALAW
:
2303 pcm_format
= SNDRV_PCM_FORMAT_A_LAW
;
2305 case USB_AUDIO_FORMAT_MU_LAW
:
2306 pcm_format
= SNDRV_PCM_FORMAT_MU_LAW
;
2309 snd_printk(KERN_INFO
"%d:%u:%d : unsupported format type %d\n",
2310 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2318 * parse the format descriptor and stores the possible sample rates
2319 * on the audioformat table.
2322 * @fp: audioformat record
2323 * @fmt: the format descriptor
2324 * @offset: the start offset of descriptor pointing the rate type
2325 * (7 for type I and II, 8 for type II)
2327 static int parse_audio_format_rates(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2328 unsigned char *fmt
, int offset
)
2330 int nr_rates
= fmt
[offset
];
2331 if (fmt
[0] < offset
+ 1 + 3 * (nr_rates
? nr_rates
: 2)) {
2332 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2333 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2339 * build the rate table and bitmap flags
2342 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2343 static unsigned int conv_rates
[] = {
2344 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2345 64000, 88200, 96000, 176400, 192000
2347 fp
->rate_table
= kmalloc(sizeof(int) * nr_rates
, GFP_KERNEL
);
2348 if (fp
->rate_table
== NULL
) {
2349 snd_printk(KERN_ERR
"cannot malloc\n");
2353 fp
->nr_rates
= nr_rates
;
2354 fp
->rate_min
= fp
->rate_max
= combine_triple(&fmt
[8]);
2355 for (r
= 0, idx
= offset
+ 1; r
< nr_rates
; r
++, idx
+= 3) {
2356 unsigned int rate
= fp
->rate_table
[r
] = combine_triple(&fmt
[idx
]);
2357 if (rate
< fp
->rate_min
)
2358 fp
->rate_min
= rate
;
2359 else if (rate
> fp
->rate_max
)
2360 fp
->rate_max
= rate
;
2361 for (c
= 0; c
< (int)ARRAY_SIZE(conv_rates
); c
++) {
2362 if (rate
== conv_rates
[c
]) {
2363 fp
->rates
|= (1 << c
);
2369 /* continuous rates */
2370 fp
->rates
= SNDRV_PCM_RATE_CONTINUOUS
;
2371 fp
->rate_min
= combine_triple(&fmt
[offset
+ 1]);
2372 fp
->rate_max
= combine_triple(&fmt
[offset
+ 4]);
2378 * parse the format type I and III descriptors
2380 static int parse_audio_format_i(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2381 int format
, unsigned char *fmt
)
2385 if (fmt
[3] == USB_FORMAT_TYPE_III
) {
2386 /* FIXME: the format type is really IECxxx
2387 * but we give normal PCM format to get the existing
2390 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2392 pcm_format
= parse_audio_format_i_type(chip
, fp
, format
, fmt
);
2396 fp
->format
= pcm_format
;
2397 fp
->channels
= fmt
[4];
2398 if (fp
->channels
< 1) {
2399 snd_printk(KERN_ERR
"%d:%u:%d : invalid channels %d\n",
2400 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fp
->channels
);
2403 return parse_audio_format_rates(chip
, fp
, fmt
, 7);
2407 * prase the format type II descriptor
2409 static int parse_audio_format_ii(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2410 int format
, unsigned char *fmt
)
2412 int brate
, framesize
;
2414 case USB_AUDIO_FORMAT_AC3
:
2415 /* FIXME: there is no AC3 format defined yet */
2416 // fp->format = SNDRV_PCM_FORMAT_AC3;
2417 fp
->format
= SNDRV_PCM_FORMAT_U8
; /* temporarily hack to receive byte streams */
2419 case USB_AUDIO_FORMAT_MPEG
:
2420 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2423 snd_printd(KERN_INFO
"%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
2424 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2425 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2429 brate
= combine_word(&fmt
[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2430 framesize
= combine_word(&fmt
[6]); /* fmt[6,7]: wSamplesPerFrame */
2431 snd_printd(KERN_INFO
"found format II with max.bitrate = %d, frame size=%d\n", brate
, framesize
);
2432 fp
->frame_size
= framesize
;
2433 return parse_audio_format_rates(chip
, fp
, fmt
, 8); /* fmt[8..] sample rates */
2436 static int parse_audio_format(snd_usb_audio_t
*chip
, struct audioformat
*fp
,
2437 int format
, unsigned char *fmt
, int stream
)
2442 case USB_FORMAT_TYPE_I
:
2443 case USB_FORMAT_TYPE_III
:
2444 err
= parse_audio_format_i(chip
, fp
, format
, fmt
);
2446 case USB_FORMAT_TYPE_II
:
2447 err
= parse_audio_format_ii(chip
, fp
, format
, fmt
);
2450 snd_printd(KERN_INFO
"%d:%u:%d : format type %d is not supported yet\n",
2451 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fmt
[3]);
2454 fp
->fmt_type
= fmt
[3];
2458 /* FIXME: temporary hack for extigy/audigy 2 nx */
2459 /* extigy apparently supports sample rates other than 48k
2460 * but not in ordinary way. so we enable only 48k atm.
2462 if (chip
->usb_id
== USB_ID(0x041e, 0x3000) ||
2463 chip
->usb_id
== USB_ID(0x041e, 0x3020)) {
2464 if (fmt
[3] == USB_FORMAT_TYPE_I
&&
2465 fp
->rates
!= SNDRV_PCM_RATE_48000
&&
2466 fp
->rates
!= SNDRV_PCM_RATE_96000
)
2473 static int parse_audio_endpoints(snd_usb_audio_t
*chip
, int iface_no
)
2475 struct usb_device
*dev
;
2476 struct usb_interface
*iface
;
2477 struct usb_host_interface
*alts
;
2478 struct usb_interface_descriptor
*altsd
;
2479 int i
, altno
, err
, stream
;
2481 struct audioformat
*fp
;
2482 unsigned char *fmt
, *csep
;
2486 /* parse the interface's altsettings */
2487 iface
= usb_ifnum_to_if(dev
, iface_no
);
2488 for (i
= 0; i
< iface
->num_altsetting
; i
++) {
2489 alts
= &iface
->altsetting
[i
];
2490 altsd
= get_iface_desc(alts
);
2491 /* skip invalid one */
2492 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2493 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2494 (altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
&&
2495 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_VENDOR_SPEC
) ||
2496 altsd
->bNumEndpoints
< 1 ||
2497 le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
) == 0)
2499 /* must be isochronous */
2500 if ((get_endpoint(alts
, 0)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) !=
2501 USB_ENDPOINT_XFER_ISOC
)
2503 /* check direction */
2504 stream
= (get_endpoint(alts
, 0)->bEndpointAddress
& USB_DIR_IN
) ?
2505 SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2506 altno
= altsd
->bAlternateSetting
;
2508 /* get audio formats */
2509 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, AS_GENERAL
);
2511 snd_printk(KERN_ERR
"%d:%u:%d : AS_GENERAL descriptor not found\n",
2512 dev
->devnum
, iface_no
, altno
);
2517 snd_printk(KERN_ERR
"%d:%u:%d : invalid AS_GENERAL desc\n",
2518 dev
->devnum
, iface_no
, altno
);
2522 format
= (fmt
[6] << 8) | fmt
[5]; /* remember the format value */
2524 /* get format type */
2525 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, FORMAT_TYPE
);
2527 snd_printk(KERN_ERR
"%d:%u:%d : no FORMAT_TYPE desc\n",
2528 dev
->devnum
, iface_no
, altno
);
2532 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2533 dev
->devnum
, iface_no
, altno
);
2537 csep
= snd_usb_find_desc(alts
->endpoint
[0].extra
, alts
->endpoint
[0].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2538 /* Creamware Noah has this descriptor after the 2nd endpoint */
2539 if (!csep
&& altsd
->bNumEndpoints
>= 2)
2540 csep
= snd_usb_find_desc(alts
->endpoint
[1].extra
, alts
->endpoint
[1].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2541 if (!csep
|| csep
[0] < 7 || csep
[2] != EP_GENERAL
) {
2542 snd_printk(KERN_ERR
"%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2543 dev
->devnum
, iface_no
, altno
);
2547 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2549 snd_printk(KERN_ERR
"cannot malloc\n");
2553 memset(fp
, 0, sizeof(*fp
));
2554 fp
->iface
= iface_no
;
2555 fp
->altsetting
= altno
;
2557 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2558 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2559 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2560 if (snd_usb_get_speed(dev
) == USB_SPEED_HIGH
)
2561 fp
->maxpacksize
= (((fp
->maxpacksize
>> 11) & 3) + 1)
2562 * (fp
->maxpacksize
& 0x7ff);
2563 fp
->attributes
= csep
[3];
2565 /* some quirks for attributes here */
2567 switch (chip
->usb_id
) {
2568 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2569 /* Optoplay sets the sample rate attribute although
2570 * it seems not supporting it in fact.
2572 fp
->attributes
&= ~EP_CS_ATTR_SAMPLE_RATE
;
2574 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2575 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2576 /* doesn't set the sample rate attribute, but supports it */
2577 fp
->attributes
|= EP_CS_ATTR_SAMPLE_RATE
;
2579 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2580 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2581 an older model 77d:223) */
2583 * plantronics headset and Griffin iMic have set adaptive-in
2584 * although it's really not...
2586 fp
->ep_attr
&= ~EP_ATTR_MASK
;
2587 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2588 fp
->ep_attr
|= EP_ATTR_ADAPTIVE
;
2590 fp
->ep_attr
|= EP_ATTR_SYNC
;
2594 /* ok, let's parse further... */
2595 if (parse_audio_format(chip
, fp
, format
, fmt
, stream
) < 0) {
2596 kfree(fp
->rate_table
);
2601 snd_printdd(KERN_INFO
"%d:%u:%d: add audio endpoint 0x%x\n", dev
->devnum
, iface_no
, i
, fp
->endpoint
);
2602 err
= add_audio_endpoint(chip
, stream
, fp
);
2604 kfree(fp
->rate_table
);
2608 /* try to set the interface... */
2609 usb_set_interface(chip
->dev
, iface_no
, altno
);
2610 init_usb_pitch(chip
->dev
, iface_no
, alts
, fp
);
2611 init_usb_sample_rate(chip
->dev
, iface_no
, alts
, fp
, fp
->rate_max
);
2618 * disconnect streams
2619 * called from snd_usb_audio_disconnect()
2621 static void snd_usb_stream_disconnect(struct list_head
*head
)
2624 snd_usb_stream_t
*as
;
2625 snd_usb_substream_t
*subs
;
2627 as
= list_entry(head
, snd_usb_stream_t
, list
);
2628 for (idx
= 0; idx
< 2; idx
++) {
2629 subs
= &as
->substream
[idx
];
2630 if (!subs
->num_formats
)
2632 release_substream_urbs(subs
, 1);
2633 subs
->interface
= -1;
2638 * parse audio control descriptor and create pcm/midi streams
2640 static int snd_usb_create_streams(snd_usb_audio_t
*chip
, int ctrlif
)
2642 struct usb_device
*dev
= chip
->dev
;
2643 struct usb_host_interface
*host_iface
;
2644 struct usb_interface
*iface
;
2648 /* find audiocontrol interface */
2649 host_iface
= &usb_ifnum_to_if(dev
, ctrlif
)->altsetting
[0];
2650 if (!(p1
= snd_usb_find_csint_desc(host_iface
->extra
, host_iface
->extralen
, NULL
, HEADER
))) {
2651 snd_printk(KERN_ERR
"cannot find HEADER\n");
2654 if (! p1
[7] || p1
[0] < 8 + p1
[7]) {
2655 snd_printk(KERN_ERR
"invalid HEADER\n");
2660 * parse all USB audio streaming interfaces
2662 for (i
= 0; i
< p1
[7]; i
++) {
2663 struct usb_host_interface
*alts
;
2664 struct usb_interface_descriptor
*altsd
;
2666 iface
= usb_ifnum_to_if(dev
, j
);
2668 snd_printk(KERN_ERR
"%d:%u:%d : does not exist\n",
2669 dev
->devnum
, ctrlif
, j
);
2672 if (usb_interface_claimed(iface
)) {
2673 snd_printdd(KERN_INFO
"%d:%d:%d: skipping, already claimed\n", dev
->devnum
, ctrlif
, j
);
2676 alts
= &iface
->altsetting
[0];
2677 altsd
= get_iface_desc(alts
);
2678 if ((altsd
->bInterfaceClass
== USB_CLASS_AUDIO
||
2679 altsd
->bInterfaceClass
== USB_CLASS_VENDOR_SPEC
) &&
2680 altsd
->bInterfaceSubClass
== USB_SUBCLASS_MIDI_STREAMING
) {
2681 if (snd_usb_create_midi_interface(chip
, iface
, NULL
) < 0) {
2682 snd_printk(KERN_ERR
"%d:%u:%d: cannot create sequencer device\n", dev
->devnum
, ctrlif
, j
);
2685 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2688 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2689 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2690 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
) {
2691 snd_printdd(KERN_ERR
"%d:%u:%d: skipping non-supported interface %d\n", dev
->devnum
, ctrlif
, j
, altsd
->bInterfaceClass
);
2692 /* skip non-supported classes */
2695 if (! parse_audio_endpoints(chip
, j
)) {
2696 usb_set_interface(dev
, j
, 0); /* reset the current interface */
2697 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2705 * create a stream for an endpoint/altsetting without proper descriptors
2707 static int create_fixed_stream_quirk(snd_usb_audio_t
*chip
,
2708 struct usb_interface
*iface
,
2709 const snd_usb_audio_quirk_t
*quirk
)
2711 struct audioformat
*fp
;
2712 struct usb_host_interface
*alts
;
2714 int *rate_table
= NULL
;
2716 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2718 snd_printk(KERN_ERR
"cannot malloc\n");
2721 memcpy(fp
, quirk
->data
, sizeof(*fp
));
2722 if (fp
->nr_rates
> 0) {
2723 rate_table
= kmalloc(sizeof(int) * fp
->nr_rates
, GFP_KERNEL
);
2728 memcpy(rate_table
, fp
->rate_table
, sizeof(int) * fp
->nr_rates
);
2729 fp
->rate_table
= rate_table
;
2732 stream
= (fp
->endpoint
& USB_DIR_IN
)
2733 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2734 err
= add_audio_endpoint(chip
, stream
, fp
);
2740 if (fp
->iface
!= get_iface_desc(&iface
->altsetting
[0])->bInterfaceNumber
||
2741 fp
->altset_idx
>= iface
->num_altsetting
) {
2746 alts
= &iface
->altsetting
[fp
->altset_idx
];
2747 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2748 init_usb_pitch(chip
->dev
, fp
->iface
, alts
, fp
);
2749 init_usb_sample_rate(chip
->dev
, fp
->iface
, alts
, fp
, fp
->rate_max
);
2754 * create a stream for an interface with proper descriptors
2756 static int create_standard_interface_quirk(snd_usb_audio_t
*chip
,
2757 struct usb_interface
*iface
,
2758 const snd_usb_audio_quirk_t
*quirk
)
2760 struct usb_host_interface
*alts
;
2761 struct usb_interface_descriptor
*altsd
;
2764 alts
= &iface
->altsetting
[0];
2765 altsd
= get_iface_desc(alts
);
2766 switch (quirk
->type
) {
2767 case QUIRK_AUDIO_STANDARD_INTERFACE
:
2768 err
= parse_audio_endpoints(chip
, altsd
->bInterfaceNumber
);
2770 usb_set_interface(chip
->dev
, altsd
->bInterfaceNumber
, 0); /* reset the current interface */
2772 case QUIRK_MIDI_STANDARD_INTERFACE
:
2773 err
= snd_usb_create_midi_interface(chip
, iface
, NULL
);
2776 snd_printd(KERN_ERR
"invalid quirk type %d\n", quirk
->type
);
2780 snd_printk(KERN_ERR
"cannot setup if %d: error %d\n",
2781 altsd
->bInterfaceNumber
, err
);
2788 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2789 * to detect the sample rate is by looking at wMaxPacketSize.
2791 static int create_ua700_ua25_quirk(snd_usb_audio_t
*chip
,
2792 struct usb_interface
*iface
,
2793 const snd_usb_audio_quirk_t
*quirk
)
2795 static const struct audioformat ua_format
= {
2796 .format
= SNDRV_PCM_FORMAT_S24_3LE
,
2798 .fmt_type
= USB_FORMAT_TYPE_I
,
2801 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2803 struct usb_host_interface
*alts
;
2804 struct usb_interface_descriptor
*altsd
;
2805 struct audioformat
*fp
;
2808 /* both PCM and MIDI interfaces have 2 altsettings */
2809 if (iface
->num_altsetting
!= 2)
2811 alts
= &iface
->altsetting
[1];
2812 altsd
= get_iface_desc(alts
);
2814 if (altsd
->bNumEndpoints
== 2) {
2815 static const snd_usb_midi_endpoint_info_t ua700_ep
= {
2816 .out_cables
= 0x0003,
2819 static const snd_usb_audio_quirk_t ua700_quirk
= {
2820 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2823 static const snd_usb_midi_endpoint_info_t ua25_ep
= {
2824 .out_cables
= 0x0001,
2827 static const snd_usb_audio_quirk_t ua25_quirk
= {
2828 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2831 if (chip
->usb_id
== USB_ID(0x0582, 0x002b))
2832 return snd_usb_create_midi_interface(chip
, iface
,
2835 return snd_usb_create_midi_interface(chip
, iface
,
2839 if (altsd
->bNumEndpoints
!= 1)
2842 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2845 memcpy(fp
, &ua_format
, sizeof(*fp
));
2847 fp
->iface
= altsd
->bInterfaceNumber
;
2848 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2849 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2850 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2852 switch (fp
->maxpacksize
) {
2854 fp
->rate_max
= fp
->rate_min
= 44100;
2858 fp
->rate_max
= fp
->rate_min
= 48000;
2862 fp
->rate_max
= fp
->rate_min
= 96000;
2865 snd_printk(KERN_ERR
"unknown sample rate\n");
2870 stream
= (fp
->endpoint
& USB_DIR_IN
)
2871 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2872 err
= add_audio_endpoint(chip
, stream
, fp
);
2877 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2882 * Create a stream for an Edirol UA-1000 interface.
2884 static int create_ua1000_quirk(snd_usb_audio_t
*chip
,
2885 struct usb_interface
*iface
,
2886 const snd_usb_audio_quirk_t
*quirk
)
2888 static const struct audioformat ua1000_format
= {
2889 .format
= SNDRV_PCM_FORMAT_S32_LE
,
2890 .fmt_type
= USB_FORMAT_TYPE_I
,
2894 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2896 struct usb_host_interface
*alts
;
2897 struct usb_interface_descriptor
*altsd
;
2898 struct audioformat
*fp
;
2901 if (iface
->num_altsetting
!= 2)
2903 alts
= &iface
->altsetting
[1];
2904 altsd
= get_iface_desc(alts
);
2905 if (alts
->extralen
!= 11 || alts
->extra
[1] != CS_AUDIO_INTERFACE
||
2906 altsd
->bNumEndpoints
!= 1)
2909 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2912 memcpy(fp
, &ua1000_format
, sizeof(*fp
));
2914 fp
->channels
= alts
->extra
[4];
2915 fp
->iface
= altsd
->bInterfaceNumber
;
2916 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2917 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2918 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2919 fp
->rate_max
= fp
->rate_min
= combine_triple(&alts
->extra
[8]);
2921 stream
= (fp
->endpoint
& USB_DIR_IN
)
2922 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2923 err
= add_audio_endpoint(chip
, stream
, fp
);
2928 /* FIXME: playback must be synchronized to capture */
2929 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2933 static int snd_usb_create_quirk(snd_usb_audio_t
*chip
,
2934 struct usb_interface
*iface
,
2935 const snd_usb_audio_quirk_t
*quirk
);
2938 * handle the quirks for the contained interfaces
2940 static int create_composite_quirk(snd_usb_audio_t
*chip
,
2941 struct usb_interface
*iface
,
2942 const snd_usb_audio_quirk_t
*quirk
)
2944 int probed_ifnum
= get_iface_desc(iface
->altsetting
)->bInterfaceNumber
;
2947 for (quirk
= quirk
->data
; quirk
->ifnum
>= 0; ++quirk
) {
2948 iface
= usb_ifnum_to_if(chip
->dev
, quirk
->ifnum
);
2951 if (quirk
->ifnum
!= probed_ifnum
&&
2952 usb_interface_claimed(iface
))
2954 err
= snd_usb_create_quirk(chip
, iface
, quirk
);
2957 if (quirk
->ifnum
!= probed_ifnum
)
2958 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2963 static int ignore_interface_quirk(snd_usb_audio_t
*chip
,
2964 struct usb_interface
*iface
,
2965 const snd_usb_audio_quirk_t
*quirk
)
2975 #define EXTIGY_FIRMWARE_SIZE_OLD 794
2976 #define EXTIGY_FIRMWARE_SIZE_NEW 483
2978 static int snd_usb_extigy_boot_quirk(struct usb_device
*dev
, struct usb_interface
*intf
)
2980 struct usb_host_config
*config
= dev
->actconfig
;
2983 if (le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_OLD
||
2984 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_NEW
) {
2985 snd_printdd("sending Extigy boot sequence...\n");
2986 /* Send message to force it to reconnect with full interface. */
2987 err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
,0),
2988 0x10, 0x43, 0x0001, 0x000a, NULL
, 0, 1000);
2989 if (err
< 0) snd_printdd("error sending boot message: %d\n", err
);
2990 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0,
2991 &dev
->descriptor
, sizeof(dev
->descriptor
));
2992 config
= dev
->actconfig
;
2993 if (err
< 0) snd_printdd("error usb_get_descriptor: %d\n", err
);
2994 err
= usb_reset_configuration(dev
);
2995 if (err
< 0) snd_printdd("error usb_reset_configuration: %d\n", err
);
2996 snd_printdd("extigy_boot: new boot length = %d\n",
2997 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
));
2998 return -ENODEV
; /* quit this anyway */
3003 static int snd_usb_audigy2nx_boot_quirk(struct usb_device
*dev
)
3007 snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), 0x2a,
3008 USB_DIR_IN
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3009 0, 0, &buf
, 1, 1000);
3011 snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), 0x29,
3012 USB_DIR_OUT
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3013 1, 2000, NULL
, 0, 1000);
3021 * audio-interface quirks
3023 * returns zero if no standard audio/MIDI parsing is needed.
3024 * returns a postive value if standard audio/midi interfaces are parsed
3026 * returns a negative value at error.
3028 static int snd_usb_create_quirk(snd_usb_audio_t
*chip
,
3029 struct usb_interface
*iface
,
3030 const snd_usb_audio_quirk_t
*quirk
)
3032 typedef int (*quirk_func_t
)(snd_usb_audio_t
*, struct usb_interface
*,
3033 const snd_usb_audio_quirk_t
*);
3034 static const quirk_func_t quirk_funcs
[] = {
3035 [QUIRK_IGNORE_INTERFACE
] = ignore_interface_quirk
,
3036 [QUIRK_COMPOSITE
] = create_composite_quirk
,
3037 [QUIRK_MIDI_STANDARD_INTERFACE
] = snd_usb_create_midi_interface
,
3038 [QUIRK_MIDI_FIXED_ENDPOINT
] = snd_usb_create_midi_interface
,
3039 [QUIRK_MIDI_YAMAHA
] = snd_usb_create_midi_interface
,
3040 [QUIRK_MIDI_MIDIMAN
] = snd_usb_create_midi_interface
,
3041 [QUIRK_MIDI_NOVATION
] = snd_usb_create_midi_interface
,
3042 [QUIRK_MIDI_RAW
] = snd_usb_create_midi_interface
,
3043 [QUIRK_MIDI_EMAGIC
] = snd_usb_create_midi_interface
,
3044 [QUIRK_MIDI_MIDITECH
] = snd_usb_create_midi_interface
,
3045 [QUIRK_AUDIO_STANDARD_INTERFACE
] = create_standard_interface_quirk
,
3046 [QUIRK_AUDIO_FIXED_ENDPOINT
] = create_fixed_stream_quirk
,
3047 [QUIRK_AUDIO_EDIROL_UA700_UA25
] = create_ua700_ua25_quirk
,
3048 [QUIRK_AUDIO_EDIROL_UA1000
] = create_ua1000_quirk
,
3051 if (quirk
->type
< QUIRK_TYPE_COUNT
) {
3052 return quirk_funcs
[quirk
->type
](chip
, iface
, quirk
);
3054 snd_printd(KERN_ERR
"invalid quirk type %d\n", quirk
->type
);
3061 * common proc files to show the usb device info
3063 static void proc_audio_usbbus_read(snd_info_entry_t
*entry
, snd_info_buffer_t
*buffer
)
3065 snd_usb_audio_t
*chip
= entry
->private_data
;
3066 if (! chip
->shutdown
)
3067 snd_iprintf(buffer
, "%03d/%03d\n", chip
->dev
->bus
->busnum
, chip
->dev
->devnum
);
3070 static void proc_audio_usbid_read(snd_info_entry_t
*entry
, snd_info_buffer_t
*buffer
)
3072 snd_usb_audio_t
*chip
= entry
->private_data
;
3073 if (! chip
->shutdown
)
3074 snd_iprintf(buffer
, "%04x:%04x\n",
3075 USB_ID_VENDOR(chip
->usb_id
),
3076 USB_ID_PRODUCT(chip
->usb_id
));
3079 static void snd_usb_audio_create_proc(snd_usb_audio_t
*chip
)
3081 snd_info_entry_t
*entry
;
3082 if (! snd_card_proc_new(chip
->card
, "usbbus", &entry
))
3083 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbbus_read
);
3084 if (! snd_card_proc_new(chip
->card
, "usbid", &entry
))
3085 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbid_read
);
3089 * free the chip instance
3091 * here we have to do not much, since pcm and controls are already freed
3095 static int snd_usb_audio_free(snd_usb_audio_t
*chip
)
3101 static int snd_usb_audio_dev_free(snd_device_t
*device
)
3103 snd_usb_audio_t
*chip
= device
->device_data
;
3104 return snd_usb_audio_free(chip
);
3109 * create a chip instance and set its names.
3111 static int snd_usb_audio_create(struct usb_device
*dev
, int idx
,
3112 const snd_usb_audio_quirk_t
*quirk
,
3113 snd_usb_audio_t
**rchip
)
3116 snd_usb_audio_t
*chip
;
3119 static snd_device_ops_t ops
= {
3120 .dev_free
= snd_usb_audio_dev_free
,
3125 if (snd_usb_get_speed(dev
) != USB_SPEED_FULL
&&
3126 snd_usb_get_speed(dev
) != USB_SPEED_HIGH
) {
3127 snd_printk(KERN_ERR
"unknown device speed %d\n", snd_usb_get_speed(dev
));
3131 card
= snd_card_new(index
[idx
], id
[idx
], THIS_MODULE
, 0);
3133 snd_printk(KERN_ERR
"cannot create card instance %d\n", idx
);
3137 chip
= kcalloc(1, sizeof(*chip
), GFP_KERNEL
);
3139 snd_card_free(card
);
3146 chip
->usb_id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3147 le16_to_cpu(dev
->descriptor
.idProduct
));
3148 INIT_LIST_HEAD(&chip
->pcm_list
);
3149 INIT_LIST_HEAD(&chip
->midi_list
);
3150 INIT_LIST_HEAD(&chip
->mixer_list
);
3152 if ((err
= snd_device_new(card
, SNDRV_DEV_LOWLEVEL
, chip
, &ops
)) < 0) {
3153 snd_usb_audio_free(chip
);
3154 snd_card_free(card
);
3158 strcpy(card
->driver
, "USB-Audio");
3159 sprintf(component
, "USB%04x:%04x",
3160 USB_ID_VENDOR(chip
->usb_id
), USB_ID_PRODUCT(chip
->usb_id
));
3161 snd_component_add(card
, component
);
3163 /* retrieve the device string as shortname */
3164 if (quirk
&& quirk
->product_name
) {
3165 strlcpy(card
->shortname
, quirk
->product_name
, sizeof(card
->shortname
));
3167 if (!dev
->descriptor
.iProduct
||
3168 usb_string(dev
, dev
->descriptor
.iProduct
,
3169 card
->shortname
, sizeof(card
->shortname
)) <= 0) {
3170 /* no name available from anywhere, so use ID */
3171 sprintf(card
->shortname
, "USB Device %#04x:%#04x",
3172 USB_ID_VENDOR(chip
->usb_id
),
3173 USB_ID_PRODUCT(chip
->usb_id
));
3177 /* retrieve the vendor and device strings as longname */
3178 if (quirk
&& quirk
->vendor_name
) {
3179 len
= strlcpy(card
->longname
, quirk
->vendor_name
, sizeof(card
->longname
));
3181 if (dev
->descriptor
.iManufacturer
)
3182 len
= usb_string(dev
, dev
->descriptor
.iManufacturer
,
3183 card
->longname
, sizeof(card
->longname
));
3186 /* we don't really care if there isn't any vendor string */
3189 strlcat(card
->longname
, " ", sizeof(card
->longname
));
3191 strlcat(card
->longname
, card
->shortname
, sizeof(card
->longname
));
3193 len
= strlcat(card
->longname
, " at ", sizeof(card
->longname
));
3195 if (len
< sizeof(card
->longname
))
3196 usb_make_path(dev
, card
->longname
+ len
, sizeof(card
->longname
) - len
);
3198 strlcat(card
->longname
,
3199 snd_usb_get_speed(dev
) == USB_SPEED_FULL
? ", full speed" : ", high speed",
3200 sizeof(card
->longname
));
3202 snd_usb_audio_create_proc(chip
);
3210 * probe the active usb device
3212 * note that this can be called multiple times per a device, when it
3213 * includes multiple audio control interfaces.
3215 * thus we check the usb device pointer and creates the card instance
3216 * only at the first time. the successive calls of this function will
3217 * append the pcm interface to the corresponding card.
3219 static void *snd_usb_audio_probe(struct usb_device
*dev
,
3220 struct usb_interface
*intf
,
3221 const struct usb_device_id
*usb_id
)
3223 struct usb_host_config
*config
= dev
->actconfig
;
3224 const snd_usb_audio_quirk_t
*quirk
= (const snd_usb_audio_quirk_t
*)usb_id
->driver_info
;
3226 snd_usb_audio_t
*chip
;
3227 struct usb_host_interface
*alts
;
3231 alts
= &intf
->altsetting
[0];
3232 ifnum
= get_iface_desc(alts
)->bInterfaceNumber
;
3233 id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3234 le16_to_cpu(dev
->descriptor
.idProduct
));
3236 if (quirk
&& quirk
->ifnum
>= 0 && ifnum
!= quirk
->ifnum
)
3239 /* SB Extigy needs special boot-up sequence */
3240 /* if more models come, this will go to the quirk list. */
3241 if (id
== USB_ID(0x041e, 0x3000)) {
3242 if (snd_usb_extigy_boot_quirk(dev
, intf
) < 0)
3244 config
= dev
->actconfig
;
3246 /* SB Audigy 2 NX needs its own boot-up magic, too */
3247 if (id
== USB_ID(0x041e, 0x3020)) {
3248 if (snd_usb_audigy2nx_boot_quirk(dev
) < 0)
3253 * found a config. now register to ALSA
3256 /* check whether it's already registered */
3258 down(®ister_mutex
);
3259 for (i
= 0; i
< SNDRV_CARDS
; i
++) {
3260 if (usb_chip
[i
] && usb_chip
[i
]->dev
== dev
) {
3261 if (usb_chip
[i
]->shutdown
) {
3262 snd_printk(KERN_ERR
"USB device is in the shutdown state, cannot create a card instance\n");
3270 /* it's a fresh one.
3271 * now look for an empty slot and create a new card instance
3273 /* first, set the current configuration for this device */
3274 if (usb_reset_configuration(dev
) < 0) {
3275 snd_printk(KERN_ERR
"cannot reset configuration (value 0x%x)\n", get_cfg_desc(config
)->bConfigurationValue
);
3278 for (i
= 0; i
< SNDRV_CARDS
; i
++)
3279 if (enable
[i
] && ! usb_chip
[i
] &&
3280 (vid
[i
] == -1 || vid
[i
] == USB_ID_VENDOR(id
)) &&
3281 (pid
[i
] == -1 || pid
[i
] == USB_ID_PRODUCT(id
))) {
3282 if (snd_usb_audio_create(dev
, i
, quirk
, &chip
) < 0) {
3285 snd_card_set_dev(chip
->card
, &intf
->dev
);
3289 snd_printk(KERN_ERR
"no available usb audio device\n");
3294 err
= 1; /* continue */
3295 if (quirk
&& quirk
->ifnum
!= QUIRK_NO_INTERFACE
) {
3296 /* need some special handlings */
3297 if ((err
= snd_usb_create_quirk(chip
, intf
, quirk
)) < 0)
3302 /* create normal USB audio interfaces */
3303 if (snd_usb_create_streams(chip
, ifnum
) < 0 ||
3304 snd_usb_create_mixer(chip
, ifnum
) < 0) {
3309 /* we are allowed to call snd_card_register() many times */
3310 if (snd_card_register(chip
->card
) < 0) {
3314 usb_chip
[chip
->index
] = chip
;
3315 chip
->num_interfaces
++;
3316 up(®ister_mutex
);
3320 if (chip
&& !chip
->num_interfaces
)
3321 snd_card_free(chip
->card
);
3322 up(®ister_mutex
);
3328 * we need to take care of counter, since disconnection can be called also
3329 * many times as well as usb_audio_probe().
3331 static void snd_usb_audio_disconnect(struct usb_device
*dev
, void *ptr
)
3333 snd_usb_audio_t
*chip
;
3335 struct list_head
*p
;
3337 if (ptr
== (void *)-1L)
3342 down(®ister_mutex
);
3344 chip
->num_interfaces
--;
3345 if (chip
->num_interfaces
<= 0) {
3346 snd_card_disconnect(card
);
3347 /* release the pcm resources */
3348 list_for_each(p
, &chip
->pcm_list
) {
3349 snd_usb_stream_disconnect(p
);
3351 /* release the midi resources */
3352 list_for_each(p
, &chip
->midi_list
) {
3353 snd_usbmidi_disconnect(p
);
3355 /* release mixer resources */
3356 list_for_each(p
, &chip
->mixer_list
) {
3357 snd_usb_mixer_disconnect(p
);
3359 usb_chip
[chip
->index
] = NULL
;
3360 up(®ister_mutex
);
3361 snd_card_free(card
);
3363 up(®ister_mutex
);
3368 * new 2.5 USB kernel API
3370 static int usb_audio_probe(struct usb_interface
*intf
,
3371 const struct usb_device_id
*id
)
3374 chip
= snd_usb_audio_probe(interface_to_usbdev(intf
), intf
, id
);
3376 dev_set_drvdata(&intf
->dev
, chip
);
3382 static void usb_audio_disconnect(struct usb_interface
*intf
)
3384 snd_usb_audio_disconnect(interface_to_usbdev(intf
),
3385 dev_get_drvdata(&intf
->dev
));
3389 static int __init
snd_usb_audio_init(void)
3391 if (nrpacks
< MIN_PACKS_URB
|| nrpacks
> MAX_PACKS
) {
3392 printk(KERN_WARNING
"invalid nrpacks value.\n");
3395 usb_register(&usb_audio_driver
);
3400 static void __exit
snd_usb_audio_cleanup(void)
3402 usb_deregister(&usb_audio_driver
);
3405 module_init(snd_usb_audio_init
);
3406 module_exit(snd_usb_audio_cleanup
);