2 * (Tentative) USB Audio Driver for ALSA
6 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
8 * Many codes borrowed from audio.c by
9 * Alan Cox (alan@lxorguk.ukuu.org.uk)
10 * Thomas Sailer (sailer@ife.ee.ethz.ch)
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 * - async unlink should be used for avoiding the sleep inside lock.
31 * 2.4.22 usb-uhci seems buggy for async unlinking and results in
32 * oops. in such a cse, pass async_unlink=0 option.
33 * - the linked URBs would be preferred but not used so far because of
34 * the instability of unlinking.
35 * - type II is not supported properly. there is no device which supports
36 * this type *correctly*. SB extigy looks as if it supports, but it's
37 * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
41 #include <sound/driver.h>
42 #include <linux/bitops.h>
43 #include <linux/init.h>
44 #include <linux/list.h>
45 #include <linux/slab.h>
46 #include <linux/string.h>
47 #include <linux/usb.h>
48 #include <linux/vmalloc.h>
49 #include <linux/moduleparam.h>
50 #include <linux/mutex.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 */
107 struct list_head list
;
108 snd_pcm_format_t format
; /* format type */
109 unsigned int channels
; /* # channels */
110 unsigned int fmt_type
; /* USB audio format type (1-3) */
111 unsigned int frame_size
; /* samples per frame for non-audio */
112 int iface
; /* interface number */
113 unsigned char altsetting
; /* corresponding alternate setting */
114 unsigned char altset_idx
; /* array index of altenate setting */
115 unsigned char attributes
; /* corresponding attributes of cs endpoint */
116 unsigned char endpoint
; /* endpoint */
117 unsigned char ep_attr
; /* endpoint attributes */
118 unsigned int maxpacksize
; /* max. packet size */
119 unsigned int rates
; /* rate bitmasks */
120 unsigned int rate_min
, rate_max
; /* min/max rates */
121 unsigned int nr_rates
; /* number of rate table entries */
122 unsigned int *rate_table
; /* rate table */
125 struct snd_usb_substream
;
129 unsigned int buffer_size
; /* size of data buffer, if data URB */
130 struct snd_usb_substream
*subs
;
131 int index
; /* index for urb array */
132 int packets
; /* number of packets per urb */
136 int (*prepare
)(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
, struct urb
*u
);
137 int (*retire
)(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
, struct urb
*u
);
138 int (*prepare_sync
)(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
, struct urb
*u
);
139 int (*retire_sync
)(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
, struct urb
*u
);
142 struct snd_usb_substream
{
143 struct snd_usb_stream
*stream
;
144 struct usb_device
*dev
;
145 struct snd_pcm_substream
*pcm_substream
;
146 int direction
; /* playback or capture */
147 int interface
; /* current interface */
148 int endpoint
; /* assigned endpoint */
149 struct audioformat
*cur_audiofmt
; /* current audioformat pointer (for hw_params callback) */
150 unsigned int cur_rate
; /* current rate (for hw_params callback) */
151 unsigned int period_bytes
; /* current period bytes (for hw_params callback) */
152 unsigned int format
; /* USB data format */
153 unsigned int datapipe
; /* the data i/o pipe */
154 unsigned int syncpipe
; /* 1 - async out or adaptive in */
155 unsigned int datainterval
; /* log_2 of data packet interval */
156 unsigned int syncinterval
; /* P for adaptive mode, 0 otherwise */
157 unsigned int freqn
; /* nominal sampling rate in fs/fps in Q16.16 format */
158 unsigned int freqm
; /* momentary sampling rate in fs/fps in Q16.16 format */
159 unsigned int freqmax
; /* maximum sampling rate, used for buffer management */
160 unsigned int phase
; /* phase accumulator */
161 unsigned int maxpacksize
; /* max packet size in bytes */
162 unsigned int maxframesize
; /* max packet size in frames */
163 unsigned int curpacksize
; /* current packet size in bytes (for capture) */
164 unsigned int curframesize
; /* current packet size in frames (for capture) */
165 unsigned int fill_max
: 1; /* fill max packet size always */
166 unsigned int fmt_type
; /* USB audio format type (1-3) */
167 unsigned int packs_per_ms
; /* packets per millisecond (for playback) */
169 unsigned int running
: 1; /* running status */
171 unsigned int hwptr_done
; /* processed frame position in the buffer */
172 unsigned int transfer_done
; /* processed frames since last period update */
173 unsigned long active_mask
; /* bitmask of active urbs */
174 unsigned long unlink_mask
; /* bitmask of unlinked urbs */
176 unsigned int nurbs
; /* # urbs */
177 struct snd_urb_ctx dataurb
[MAX_URBS
]; /* data urb table */
178 struct snd_urb_ctx syncurb
[SYNC_URBS
]; /* sync urb table */
179 char *syncbuf
; /* sync buffer for all sync URBs */
180 dma_addr_t sync_dma
; /* DMA address of syncbuf */
182 u64 formats
; /* format bitmasks (all or'ed) */
183 unsigned int num_formats
; /* number of supported audio formats (list) */
184 struct list_head fmt_list
; /* format list */
187 struct snd_urb_ops ops
; /* callbacks (must be filled at init) */
191 struct snd_usb_stream
{
192 struct snd_usb_audio
*chip
;
195 unsigned int fmt_type
; /* USB audio format type (1-3) */
196 struct snd_usb_substream substream
[2];
197 struct list_head list
;
202 * we keep the snd_usb_audio_t instances by ourselves for merging
203 * the all interfaces on the same card as one sound device.
206 static DEFINE_MUTEX(register_mutex
);
207 static struct snd_usb_audio
*usb_chip
[SNDRV_CARDS
];
211 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
212 * this will overflow at approx 524 kHz
214 static inline unsigned get_usb_full_speed_rate(unsigned int rate
)
216 return ((rate
<< 13) + 62) / 125;
220 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
221 * this will overflow at approx 4 MHz
223 static inline unsigned get_usb_high_speed_rate(unsigned int rate
)
225 return ((rate
<< 10) + 62) / 125;
228 /* convert our full speed USB rate into sampling rate in Hz */
229 static inline unsigned get_full_speed_hz(unsigned int usb_rate
)
231 return (usb_rate
* 125 + (1 << 12)) >> 13;
234 /* convert our high speed USB rate into sampling rate in Hz */
235 static inline unsigned get_high_speed_hz(unsigned int usb_rate
)
237 return (usb_rate
* 125 + (1 << 9)) >> 10;
242 * prepare urb for full speed capture sync pipe
244 * fill the length and offset of each urb descriptor.
245 * the fixed 10.14 frequency is passed through the pipe.
247 static int prepare_capture_sync_urb(struct snd_usb_substream
*subs
,
248 struct snd_pcm_runtime
*runtime
,
251 unsigned char *cp
= urb
->transfer_buffer
;
252 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
254 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
255 urb
->iso_frame_desc
[0].length
= 3;
256 urb
->iso_frame_desc
[0].offset
= 0;
257 cp
[0] = subs
->freqn
>> 2;
258 cp
[1] = subs
->freqn
>> 10;
259 cp
[2] = subs
->freqn
>> 18;
264 * prepare urb for high speed capture sync pipe
266 * fill the length and offset of each urb descriptor.
267 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
269 static int prepare_capture_sync_urb_hs(struct snd_usb_substream
*subs
,
270 struct snd_pcm_runtime
*runtime
,
273 unsigned char *cp
= urb
->transfer_buffer
;
274 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
276 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
277 urb
->iso_frame_desc
[0].length
= 4;
278 urb
->iso_frame_desc
[0].offset
= 0;
280 cp
[1] = subs
->freqn
>> 8;
281 cp
[2] = subs
->freqn
>> 16;
282 cp
[3] = subs
->freqn
>> 24;
287 * process after capture sync complete
290 static int retire_capture_sync_urb(struct snd_usb_substream
*subs
,
291 struct snd_pcm_runtime
*runtime
,
298 * prepare urb for capture data pipe
300 * fill the offset and length of each descriptor.
302 * we use a temporary buffer to write the captured data.
303 * since the length of written data is determined by host, we cannot
304 * write onto the pcm buffer directly... the data is thus copied
305 * later at complete callback to the global buffer.
307 static int prepare_capture_urb(struct snd_usb_substream
*subs
,
308 struct snd_pcm_runtime
*runtime
,
312 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
315 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
316 for (i
= 0; i
< ctx
->packets
; i
++) {
317 urb
->iso_frame_desc
[i
].offset
= offs
;
318 urb
->iso_frame_desc
[i
].length
= subs
->curpacksize
;
319 offs
+= subs
->curpacksize
;
321 urb
->transfer_buffer_length
= offs
;
322 urb
->number_of_packets
= ctx
->packets
;
324 if (! urb
->bandwidth
) {
326 bustime
= usb_check_bandwidth(urb
->dev
, urb
);
329 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx
->index
, bustime
, urb
->number_of_packets
);
330 usb_claim_bandwidth(urb
->dev
, urb
, bustime
, 1);
337 * process after capture complete
339 * copy the data from each desctiptor to the pcm buffer, and
340 * update the current position.
342 static int retire_capture_urb(struct snd_usb_substream
*subs
,
343 struct snd_pcm_runtime
*runtime
,
349 unsigned int stride
, len
, oldptr
;
350 int period_elapsed
= 0;
352 stride
= runtime
->frame_bits
>> 3;
354 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
355 cp
= (unsigned char *)urb
->transfer_buffer
+ urb
->iso_frame_desc
[i
].offset
;
356 if (urb
->iso_frame_desc
[i
].status
) {
357 snd_printd(KERN_ERR
"frame %d active: %d\n", i
, urb
->iso_frame_desc
[i
].status
);
360 len
= urb
->iso_frame_desc
[i
].actual_length
/ stride
;
363 /* update the current pointer */
364 spin_lock_irqsave(&subs
->lock
, flags
);
365 oldptr
= subs
->hwptr_done
;
366 subs
->hwptr_done
+= len
;
367 if (subs
->hwptr_done
>= runtime
->buffer_size
)
368 subs
->hwptr_done
-= runtime
->buffer_size
;
369 subs
->transfer_done
+= len
;
370 if (subs
->transfer_done
>= runtime
->period_size
) {
371 subs
->transfer_done
-= runtime
->period_size
;
374 spin_unlock_irqrestore(&subs
->lock
, flags
);
375 /* copy a data chunk */
376 if (oldptr
+ len
> runtime
->buffer_size
) {
377 unsigned int cnt
= runtime
->buffer_size
- oldptr
;
378 unsigned int blen
= cnt
* stride
;
379 memcpy(runtime
->dma_area
+ oldptr
* stride
, cp
, blen
);
380 memcpy(runtime
->dma_area
, cp
+ blen
, len
* stride
- blen
);
382 memcpy(runtime
->dma_area
+ oldptr
* stride
, cp
, len
* stride
);
386 snd_pcm_period_elapsed(subs
->pcm_substream
);
392 * prepare urb for full speed playback sync pipe
394 * set up the offset and length to receive the current frequency.
397 static int prepare_playback_sync_urb(struct snd_usb_substream
*subs
,
398 struct snd_pcm_runtime
*runtime
,
401 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
403 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
404 urb
->iso_frame_desc
[0].length
= 3;
405 urb
->iso_frame_desc
[0].offset
= 0;
410 * prepare urb for high speed playback sync pipe
412 * set up the offset and length to receive the current frequency.
415 static int prepare_playback_sync_urb_hs(struct snd_usb_substream
*subs
,
416 struct snd_pcm_runtime
*runtime
,
419 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
421 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
422 urb
->iso_frame_desc
[0].length
= 4;
423 urb
->iso_frame_desc
[0].offset
= 0;
428 * process after full speed playback sync complete
430 * retrieve the current 10.14 frequency from pipe, and set it.
431 * the value is referred in prepare_playback_urb().
433 static int retire_playback_sync_urb(struct snd_usb_substream
*subs
,
434 struct snd_pcm_runtime
*runtime
,
440 if (urb
->iso_frame_desc
[0].status
== 0 &&
441 urb
->iso_frame_desc
[0].actual_length
== 3) {
442 f
= combine_triple((u8
*)urb
->transfer_buffer
) << 2;
443 if (f
>= subs
->freqn
- subs
->freqn
/ 8 && f
<= subs
->freqmax
) {
444 spin_lock_irqsave(&subs
->lock
, flags
);
446 spin_unlock_irqrestore(&subs
->lock
, flags
);
454 * process after high speed playback sync complete
456 * retrieve the current 12.13 frequency from pipe, and set it.
457 * the value is referred in prepare_playback_urb().
459 static int retire_playback_sync_urb_hs(struct snd_usb_substream
*subs
,
460 struct snd_pcm_runtime
*runtime
,
466 if (urb
->iso_frame_desc
[0].status
== 0 &&
467 urb
->iso_frame_desc
[0].actual_length
== 4) {
468 f
= combine_quad((u8
*)urb
->transfer_buffer
) & 0x0fffffff;
469 if (f
>= subs
->freqn
- subs
->freqn
/ 8 && f
<= subs
->freqmax
) {
470 spin_lock_irqsave(&subs
->lock
, flags
);
472 spin_unlock_irqrestore(&subs
->lock
, flags
);
479 /* determine the number of frames in the next packet */
480 static int snd_usb_audio_next_packet_size(struct snd_usb_substream
*subs
)
483 return subs
->maxframesize
;
485 subs
->phase
= (subs
->phase
& 0xffff)
486 + (subs
->freqm
<< subs
->datainterval
);
487 return min(subs
->phase
>> 16, subs
->maxframesize
);
492 * Prepare urb for streaming before playback starts.
494 * We don't yet have data, so we send a frame of silence.
496 static int prepare_startup_playback_urb(struct snd_usb_substream
*subs
,
497 struct snd_pcm_runtime
*runtime
,
500 unsigned int i
, offs
, counts
;
501 struct snd_urb_ctx
*ctx
= urb
->context
;
502 int stride
= runtime
->frame_bits
>> 3;
505 urb
->dev
= ctx
->subs
->dev
;
506 urb
->number_of_packets
= subs
->packs_per_ms
;
507 for (i
= 0; i
< subs
->packs_per_ms
; ++i
) {
508 counts
= snd_usb_audio_next_packet_size(subs
);
509 urb
->iso_frame_desc
[i
].offset
= offs
* stride
;
510 urb
->iso_frame_desc
[i
].length
= counts
* stride
;
513 urb
->transfer_buffer_length
= offs
* stride
;
514 memset(urb
->transfer_buffer
,
515 subs
->cur_audiofmt
->format
== SNDRV_PCM_FORMAT_U8
? 0x80 : 0,
521 * prepare urb for playback data pipe
523 * Since a URB can handle only a single linear buffer, we must use double
524 * buffering when the data to be transferred overflows the buffer boundary.
525 * To avoid inconsistencies when updating hwptr_done, we use double buffering
528 static int prepare_playback_urb(struct snd_usb_substream
*subs
,
529 struct snd_pcm_runtime
*runtime
,
535 int period_elapsed
= 0;
536 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
538 stride
= runtime
->frame_bits
>> 3;
541 urb
->dev
= ctx
->subs
->dev
; /* we need to set this at each time */
542 urb
->number_of_packets
= 0;
543 spin_lock_irqsave(&subs
->lock
, flags
);
544 for (i
= 0; i
< ctx
->packets
; i
++) {
545 counts
= snd_usb_audio_next_packet_size(subs
);
546 /* set up descriptor */
547 urb
->iso_frame_desc
[i
].offset
= offs
* stride
;
548 urb
->iso_frame_desc
[i
].length
= counts
* stride
;
550 urb
->number_of_packets
++;
551 subs
->transfer_done
+= counts
;
552 if (subs
->transfer_done
>= runtime
->period_size
) {
553 subs
->transfer_done
-= runtime
->period_size
;
555 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
) {
556 if (subs
->transfer_done
> 0) {
557 /* FIXME: fill-max mode is not
559 offs
-= subs
->transfer_done
;
560 counts
-= subs
->transfer_done
;
561 urb
->iso_frame_desc
[i
].length
=
563 subs
->transfer_done
= 0;
566 if (i
< ctx
->packets
) {
567 /* add a transfer delimiter */
568 urb
->iso_frame_desc
[i
].offset
=
570 urb
->iso_frame_desc
[i
].length
= 0;
571 urb
->number_of_packets
++;
576 /* finish at the frame boundary at/after the period boundary */
577 if (period_elapsed
&&
578 (i
& (subs
->packs_per_ms
- 1)) == subs
->packs_per_ms
- 1)
581 if (subs
->hwptr_done
+ offs
> runtime
->buffer_size
) {
582 /* err, the transferred area goes over buffer boundary. */
583 unsigned int len
= runtime
->buffer_size
- subs
->hwptr_done
;
584 memcpy(urb
->transfer_buffer
,
585 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
587 memcpy(urb
->transfer_buffer
+ len
* stride
,
589 (offs
- len
) * stride
);
591 memcpy(urb
->transfer_buffer
,
592 runtime
->dma_area
+ subs
->hwptr_done
* stride
,
595 subs
->hwptr_done
+= offs
;
596 if (subs
->hwptr_done
>= runtime
->buffer_size
)
597 subs
->hwptr_done
-= runtime
->buffer_size
;
598 spin_unlock_irqrestore(&subs
->lock
, flags
);
599 urb
->transfer_buffer_length
= offs
* stride
;
601 snd_pcm_period_elapsed(subs
->pcm_substream
);
606 * process after playback data complete
609 static int retire_playback_urb(struct snd_usb_substream
*subs
,
610 struct snd_pcm_runtime
*runtime
,
619 static struct snd_urb_ops audio_urb_ops
[2] = {
621 .prepare
= prepare_startup_playback_urb
,
622 .retire
= retire_playback_urb
,
623 .prepare_sync
= prepare_playback_sync_urb
,
624 .retire_sync
= retire_playback_sync_urb
,
627 .prepare
= prepare_capture_urb
,
628 .retire
= retire_capture_urb
,
629 .prepare_sync
= prepare_capture_sync_urb
,
630 .retire_sync
= retire_capture_sync_urb
,
634 static struct snd_urb_ops audio_urb_ops_high_speed
[2] = {
636 .prepare
= prepare_startup_playback_urb
,
637 .retire
= retire_playback_urb
,
638 .prepare_sync
= prepare_playback_sync_urb_hs
,
639 .retire_sync
= retire_playback_sync_urb_hs
,
642 .prepare
= prepare_capture_urb
,
643 .retire
= retire_capture_urb
,
644 .prepare_sync
= prepare_capture_sync_urb_hs
,
645 .retire_sync
= retire_capture_sync_urb
,
650 * complete callback from data urb
652 static void snd_complete_urb(struct urb
*urb
, struct pt_regs
*regs
)
654 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
655 struct snd_usb_substream
*subs
= ctx
->subs
;
656 struct snd_pcm_substream
*substream
= ctx
->subs
->pcm_substream
;
659 if ((subs
->running
&& subs
->ops
.retire(subs
, substream
->runtime
, urb
)) ||
660 ! subs
->running
|| /* can be stopped during retire callback */
661 (err
= subs
->ops
.prepare(subs
, substream
->runtime
, urb
)) < 0 ||
662 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
663 clear_bit(ctx
->index
, &subs
->active_mask
);
665 snd_printd(KERN_ERR
"cannot submit urb (err = %d)\n", err
);
666 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
673 * complete callback from sync urb
675 static void snd_complete_sync_urb(struct urb
*urb
, struct pt_regs
*regs
)
677 struct snd_urb_ctx
*ctx
= (struct snd_urb_ctx
*)urb
->context
;
678 struct snd_usb_substream
*subs
= ctx
->subs
;
679 struct snd_pcm_substream
*substream
= ctx
->subs
->pcm_substream
;
682 if ((subs
->running
&& subs
->ops
.retire_sync(subs
, substream
->runtime
, urb
)) ||
683 ! subs
->running
|| /* can be stopped during retire callback */
684 (err
= subs
->ops
.prepare_sync(subs
, substream
->runtime
, urb
)) < 0 ||
685 (err
= usb_submit_urb(urb
, GFP_ATOMIC
)) < 0) {
686 clear_bit(ctx
->index
+ 16, &subs
->active_mask
);
688 snd_printd(KERN_ERR
"cannot submit sync urb (err = %d)\n", err
);
689 snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
695 /* get the physical page pointer at the given offset */
696 static struct page
*snd_pcm_get_vmalloc_page(struct snd_pcm_substream
*subs
,
697 unsigned long offset
)
699 void *pageptr
= subs
->runtime
->dma_area
+ offset
;
700 return vmalloc_to_page(pageptr
);
703 /* allocate virtual buffer; may be called more than once */
704 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream
*subs
, size_t size
)
706 struct snd_pcm_runtime
*runtime
= subs
->runtime
;
707 if (runtime
->dma_area
) {
708 if (runtime
->dma_bytes
>= size
)
709 return 0; /* already large enough */
710 vfree(runtime
->dma_area
);
712 runtime
->dma_area
= vmalloc(size
);
713 if (! runtime
->dma_area
)
715 runtime
->dma_bytes
= size
;
719 /* free virtual buffer; may be called more than once */
720 static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream
*subs
)
722 struct snd_pcm_runtime
*runtime
= subs
->runtime
;
723 if (runtime
->dma_area
) {
724 vfree(runtime
->dma_area
);
725 runtime
->dma_area
= NULL
;
732 * unlink active urbs.
734 static int deactivate_urbs(struct snd_usb_substream
*subs
, int force
, int can_sleep
)
741 if (!force
&& subs
->stream
->chip
->shutdown
) /* to be sure... */
744 async
= !can_sleep
&& async_unlink
;
746 if (! async
&& in_interrupt())
749 for (i
= 0; i
< subs
->nurbs
; i
++) {
750 if (test_bit(i
, &subs
->active_mask
)) {
751 if (! test_and_set_bit(i
, &subs
->unlink_mask
)) {
752 struct urb
*u
= subs
->dataurb
[i
].urb
;
760 if (subs
->syncpipe
) {
761 for (i
= 0; i
< SYNC_URBS
; i
++) {
762 if (test_bit(i
+16, &subs
->active_mask
)) {
763 if (! test_and_set_bit(i
+16, &subs
->unlink_mask
)) {
764 struct urb
*u
= subs
->syncurb
[i
].urb
;
778 * set up and start data/sync urbs
780 static int start_urbs(struct snd_usb_substream
*subs
, struct snd_pcm_runtime
*runtime
)
785 if (subs
->stream
->chip
->shutdown
)
788 for (i
= 0; i
< subs
->nurbs
; i
++) {
789 snd_assert(subs
->dataurb
[i
].urb
, return -EINVAL
);
790 if (subs
->ops
.prepare(subs
, runtime
, subs
->dataurb
[i
].urb
) < 0) {
791 snd_printk(KERN_ERR
"cannot prepare datapipe for urb %d\n", i
);
795 if (subs
->syncpipe
) {
796 for (i
= 0; i
< SYNC_URBS
; i
++) {
797 snd_assert(subs
->syncurb
[i
].urb
, return -EINVAL
);
798 if (subs
->ops
.prepare_sync(subs
, runtime
, subs
->syncurb
[i
].urb
) < 0) {
799 snd_printk(KERN_ERR
"cannot prepare syncpipe for urb %d\n", i
);
805 subs
->active_mask
= 0;
806 subs
->unlink_mask
= 0;
808 for (i
= 0; i
< subs
->nurbs
; i
++) {
809 if ((err
= usb_submit_urb(subs
->dataurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
810 snd_printk(KERN_ERR
"cannot submit datapipe for urb %d, err = %d\n", i
, err
);
813 set_bit(i
, &subs
->active_mask
);
815 if (subs
->syncpipe
) {
816 for (i
= 0; i
< SYNC_URBS
; i
++) {
817 if ((err
= usb_submit_urb(subs
->syncurb
[i
].urb
, GFP_ATOMIC
)) < 0) {
818 snd_printk(KERN_ERR
"cannot submit syncpipe for urb %d, err = %d\n", i
, err
);
821 set_bit(i
+ 16, &subs
->active_mask
);
827 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
828 deactivate_urbs(subs
, 0, 0);
834 * wait until all urbs are processed.
836 static int wait_clear_urbs(struct snd_usb_substream
*subs
)
838 unsigned long end_time
= jiffies
+ msecs_to_jiffies(1000);
844 for (i
= 0; i
< subs
->nurbs
; i
++) {
845 if (test_bit(i
, &subs
->active_mask
))
848 if (subs
->syncpipe
) {
849 for (i
= 0; i
< SYNC_URBS
; i
++) {
850 if (test_bit(i
+ 16, &subs
->active_mask
))
856 schedule_timeout_uninterruptible(1);
857 } while (time_before(jiffies
, end_time
));
859 snd_printk(KERN_ERR
"timeout: still %d active urbs..\n", alive
);
865 * return the current pcm pointer. just return the hwptr_done value.
867 static snd_pcm_uframes_t
snd_usb_pcm_pointer(struct snd_pcm_substream
*substream
)
869 struct snd_usb_substream
*subs
;
870 snd_pcm_uframes_t hwptr_done
;
872 subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
873 spin_lock(&subs
->lock
);
874 hwptr_done
= subs
->hwptr_done
;
875 spin_unlock(&subs
->lock
);
881 * start/stop playback substream
883 static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream
*substream
,
886 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
889 case SNDRV_PCM_TRIGGER_START
:
890 subs
->ops
.prepare
= prepare_playback_urb
;
892 case SNDRV_PCM_TRIGGER_STOP
:
893 return deactivate_urbs(subs
, 0, 0);
900 * start/stop capture substream
902 static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream
*substream
,
905 struct snd_usb_substream
*subs
= substream
->runtime
->private_data
;
908 case SNDRV_PCM_TRIGGER_START
:
909 return start_urbs(subs
, substream
->runtime
);
910 case SNDRV_PCM_TRIGGER_STOP
:
911 return deactivate_urbs(subs
, 0, 0);
921 static void release_urb_ctx(struct snd_urb_ctx
*u
)
925 usb_buffer_free(u
->subs
->dev
, u
->buffer_size
,
926 u
->urb
->transfer_buffer
,
927 u
->urb
->transfer_dma
);
928 usb_free_urb(u
->urb
);
934 * release a substream
936 static void release_substream_urbs(struct snd_usb_substream
*subs
, int force
)
940 /* stop urbs (to be sure) */
941 deactivate_urbs(subs
, force
, 1);
942 wait_clear_urbs(subs
);
944 for (i
= 0; i
< MAX_URBS
; i
++)
945 release_urb_ctx(&subs
->dataurb
[i
]);
946 for (i
= 0; i
< SYNC_URBS
; i
++)
947 release_urb_ctx(&subs
->syncurb
[i
]);
948 usb_buffer_free(subs
->dev
, SYNC_URBS
* 4,
949 subs
->syncbuf
, subs
->sync_dma
);
950 subs
->syncbuf
= NULL
;
955 * initialize a substream for plaback/capture
957 static int init_substream_urbs(struct snd_usb_substream
*subs
, unsigned int period_bytes
,
958 unsigned int rate
, unsigned int frame_bits
)
960 unsigned int maxsize
, n
, i
;
961 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
962 unsigned int npacks
[MAX_URBS
], urb_packs
, total_packs
, packs_per_ms
;
964 /* calculate the frequency in 16.16 format */
965 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
966 subs
->freqn
= get_usb_full_speed_rate(rate
);
968 subs
->freqn
= get_usb_high_speed_rate(rate
);
969 subs
->freqm
= subs
->freqn
;
970 /* calculate max. frequency */
971 if (subs
->maxpacksize
) {
972 /* whatever fits into a max. size packet */
973 maxsize
= subs
->maxpacksize
;
974 subs
->freqmax
= (maxsize
/ (frame_bits
>> 3))
975 << (16 - subs
->datainterval
);
977 /* no max. packet size: just take 25% higher than nominal */
978 subs
->freqmax
= subs
->freqn
+ (subs
->freqn
>> 2);
979 maxsize
= ((subs
->freqmax
+ 0xffff) * (frame_bits
>> 3))
980 >> (16 - subs
->datainterval
);
985 subs
->curpacksize
= subs
->maxpacksize
;
987 subs
->curpacksize
= maxsize
;
989 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
)
990 packs_per_ms
= 8 >> subs
->datainterval
;
993 subs
->packs_per_ms
= packs_per_ms
;
997 urb_packs
= max(urb_packs
, (unsigned int)MIN_PACKS_URB
);
998 urb_packs
= min(urb_packs
, (unsigned int)MAX_PACKS
);
1001 urb_packs
*= packs_per_ms
;
1003 /* decide how many packets to be used */
1005 unsigned int minsize
;
1006 /* determine how small a packet can be */
1007 minsize
= (subs
->freqn
>> (16 - subs
->datainterval
))
1008 * (frame_bits
>> 3);
1009 /* with sync from device, assume it can be 12% lower */
1011 minsize
-= minsize
>> 3;
1012 minsize
= max(minsize
, 1u);
1013 total_packs
= (period_bytes
+ minsize
- 1) / minsize
;
1014 /* round up to multiple of packs_per_ms */
1015 total_packs
= (total_packs
+ packs_per_ms
- 1)
1016 & ~(packs_per_ms
- 1);
1017 /* we need at least two URBs for queueing */
1018 if (total_packs
< 2 * MIN_PACKS_URB
* packs_per_ms
)
1019 total_packs
= 2 * MIN_PACKS_URB
* packs_per_ms
;
1021 total_packs
= MAX_URBS
* urb_packs
;
1023 subs
->nurbs
= (total_packs
+ urb_packs
- 1) / urb_packs
;
1024 if (subs
->nurbs
> MAX_URBS
) {
1026 subs
->nurbs
= MAX_URBS
;
1027 total_packs
= MAX_URBS
* urb_packs
;
1030 for (i
= 0; i
< subs
->nurbs
; i
++) {
1031 npacks
[i
] = n
> urb_packs
? urb_packs
: n
;
1034 if (subs
->nurbs
<= 1) {
1035 /* too little - we need at least two packets
1036 * to ensure contiguous playback/capture
1039 npacks
[0] = (total_packs
+ 1) / 2;
1040 npacks
[1] = total_packs
- npacks
[0];
1041 } else if (npacks
[subs
->nurbs
-1] < MIN_PACKS_URB
* packs_per_ms
) {
1042 /* the last packet is too small.. */
1043 if (subs
->nurbs
> 2) {
1044 /* merge to the first one */
1045 npacks
[0] += npacks
[subs
->nurbs
- 1];
1050 npacks
[0] = (total_packs
+ 1) / 2;
1051 npacks
[1] = total_packs
- npacks
[0];
1055 /* allocate and initialize data urbs */
1056 for (i
= 0; i
< subs
->nurbs
; i
++) {
1057 struct snd_urb_ctx
*u
= &subs
->dataurb
[i
];
1060 u
->packets
= npacks
[i
];
1061 u
->buffer_size
= maxsize
* u
->packets
;
1062 if (subs
->fmt_type
== USB_FORMAT_TYPE_II
)
1063 u
->packets
++; /* for transfer delimiter */
1064 u
->urb
= usb_alloc_urb(u
->packets
, GFP_KERNEL
);
1067 u
->urb
->transfer_buffer
=
1068 usb_buffer_alloc(subs
->dev
, u
->buffer_size
, GFP_KERNEL
,
1069 &u
->urb
->transfer_dma
);
1070 if (! u
->urb
->transfer_buffer
)
1072 u
->urb
->pipe
= subs
->datapipe
;
1073 u
->urb
->transfer_flags
= URB_ISO_ASAP
| URB_NO_TRANSFER_DMA_MAP
;
1074 u
->urb
->interval
= 1 << subs
->datainterval
;
1075 u
->urb
->context
= u
;
1076 u
->urb
->complete
= snd_complete_urb
;
1079 if (subs
->syncpipe
) {
1080 /* allocate and initialize sync urbs */
1081 subs
->syncbuf
= usb_buffer_alloc(subs
->dev
, SYNC_URBS
* 4,
1082 GFP_KERNEL
, &subs
->sync_dma
);
1083 if (! subs
->syncbuf
)
1085 for (i
= 0; i
< SYNC_URBS
; i
++) {
1086 struct snd_urb_ctx
*u
= &subs
->syncurb
[i
];
1090 u
->urb
= usb_alloc_urb(1, GFP_KERNEL
);
1093 u
->urb
->transfer_buffer
= subs
->syncbuf
+ i
* 4;
1094 u
->urb
->transfer_dma
= subs
->sync_dma
+ i
* 4;
1095 u
->urb
->transfer_buffer_length
= 4;
1096 u
->urb
->pipe
= subs
->syncpipe
;
1097 u
->urb
->transfer_flags
= URB_ISO_ASAP
|
1098 URB_NO_TRANSFER_DMA_MAP
;
1099 u
->urb
->number_of_packets
= 1;
1100 u
->urb
->interval
= 1 << subs
->syncinterval
;
1101 u
->urb
->context
= u
;
1102 u
->urb
->complete
= snd_complete_sync_urb
;
1108 release_substream_urbs(subs
, 0);
1114 * find a matching audio format
1116 static struct audioformat
*find_format(struct snd_usb_substream
*subs
, unsigned int format
,
1117 unsigned int rate
, unsigned int channels
)
1119 struct list_head
*p
;
1120 struct audioformat
*found
= NULL
;
1121 int cur_attr
= 0, attr
;
1123 list_for_each(p
, &subs
->fmt_list
) {
1124 struct audioformat
*fp
;
1125 fp
= list_entry(p
, struct audioformat
, list
);
1126 if (fp
->format
!= format
|| fp
->channels
!= channels
)
1128 if (rate
< fp
->rate_min
|| rate
> fp
->rate_max
)
1130 if (! (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)) {
1132 for (i
= 0; i
< fp
->nr_rates
; i
++)
1133 if (fp
->rate_table
[i
] == rate
)
1135 if (i
>= fp
->nr_rates
)
1138 attr
= fp
->ep_attr
& EP_ATTR_MASK
;
1144 /* avoid async out and adaptive in if the other method
1145 * supports the same format.
1146 * this is a workaround for the case like
1147 * M-audio audiophile USB.
1149 if (attr
!= cur_attr
) {
1150 if ((attr
== EP_ATTR_ASYNC
&&
1151 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1152 (attr
== EP_ATTR_ADAPTIVE
&&
1153 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
))
1155 if ((cur_attr
== EP_ATTR_ASYNC
&&
1156 subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) ||
1157 (cur_attr
== EP_ATTR_ADAPTIVE
&&
1158 subs
->direction
== SNDRV_PCM_STREAM_CAPTURE
)) {
1164 /* find the format with the largest max. packet size */
1165 if (fp
->maxpacksize
> found
->maxpacksize
) {
1175 * initialize the picth control and sample rate
1177 static int init_usb_pitch(struct usb_device
*dev
, int iface
,
1178 struct usb_host_interface
*alts
,
1179 struct audioformat
*fmt
)
1182 unsigned char data
[1];
1185 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1186 /* if endpoint has pitch control, enable it */
1187 if (fmt
->attributes
& EP_CS_ATTR_PITCH_CONTROL
) {
1189 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1190 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1191 PITCH_CONTROL
<< 8, ep
, data
, 1, 1000)) < 0) {
1192 snd_printk(KERN_ERR
"%d:%d:%d: cannot set enable PITCH\n",
1193 dev
->devnum
, iface
, ep
);
1200 static int init_usb_sample_rate(struct usb_device
*dev
, int iface
,
1201 struct usb_host_interface
*alts
,
1202 struct audioformat
*fmt
, int rate
)
1205 unsigned char data
[3];
1208 ep
= get_endpoint(alts
, 0)->bEndpointAddress
;
1209 /* if endpoint has sampling rate control, set it */
1210 if (fmt
->attributes
& EP_CS_ATTR_SAMPLE_RATE
) {
1213 data
[1] = rate
>> 8;
1214 data
[2] = rate
>> 16;
1215 if ((err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), SET_CUR
,
1216 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_OUT
,
1217 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1218 snd_printk(KERN_ERR
"%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1219 dev
->devnum
, iface
, fmt
->altsetting
, rate
, ep
);
1222 if ((err
= snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), GET_CUR
,
1223 USB_TYPE_CLASS
|USB_RECIP_ENDPOINT
|USB_DIR_IN
,
1224 SAMPLING_FREQ_CONTROL
<< 8, ep
, data
, 3, 1000)) < 0) {
1225 snd_printk(KERN_WARNING
"%d:%d:%d: cannot get freq at ep 0x%x\n",
1226 dev
->devnum
, iface
, fmt
->altsetting
, ep
);
1227 return 0; /* some devices don't support reading */
1229 crate
= data
[0] | (data
[1] << 8) | (data
[2] << 16);
1230 if (crate
!= rate
) {
1231 snd_printd(KERN_WARNING
"current rate %d is different from the runtime rate %d\n", crate
, rate
);
1232 // runtime->rate = crate;
1239 * find a matching format and set up the interface
1241 static int set_format(struct snd_usb_substream
*subs
, struct audioformat
*fmt
)
1243 struct usb_device
*dev
= subs
->dev
;
1244 struct usb_host_interface
*alts
;
1245 struct usb_interface_descriptor
*altsd
;
1246 struct usb_interface
*iface
;
1247 unsigned int ep
, attr
;
1248 int is_playback
= subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
;
1251 iface
= usb_ifnum_to_if(dev
, fmt
->iface
);
1252 snd_assert(iface
, return -EINVAL
);
1253 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1254 altsd
= get_iface_desc(alts
);
1255 snd_assert(altsd
->bAlternateSetting
== fmt
->altsetting
, return -EINVAL
);
1257 if (fmt
== subs
->cur_audiofmt
)
1260 /* close the old interface */
1261 if (subs
->interface
>= 0 && subs
->interface
!= fmt
->iface
) {
1262 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1263 subs
->interface
= -1;
1268 if (subs
->interface
!= fmt
->iface
|| subs
->format
!= fmt
->altset_idx
) {
1269 if (usb_set_interface(dev
, fmt
->iface
, fmt
->altsetting
) < 0) {
1270 snd_printk(KERN_ERR
"%d:%d:%d: usb_set_interface failed\n",
1271 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1274 snd_printdd(KERN_INFO
"setting usb interface %d:%d\n", fmt
->iface
, fmt
->altsetting
);
1275 subs
->interface
= fmt
->iface
;
1276 subs
->format
= fmt
->altset_idx
;
1279 /* create a data pipe */
1280 ep
= fmt
->endpoint
& USB_ENDPOINT_NUMBER_MASK
;
1282 subs
->datapipe
= usb_sndisocpipe(dev
, ep
);
1284 subs
->datapipe
= usb_rcvisocpipe(dev
, ep
);
1285 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_HIGH
&&
1286 get_endpoint(alts
, 0)->bInterval
>= 1 &&
1287 get_endpoint(alts
, 0)->bInterval
<= 4)
1288 subs
->datainterval
= get_endpoint(alts
, 0)->bInterval
- 1;
1290 subs
->datainterval
= 0;
1291 subs
->syncpipe
= subs
->syncinterval
= 0;
1292 subs
->maxpacksize
= fmt
->maxpacksize
;
1295 /* we need a sync pipe in async OUT or adaptive IN mode */
1296 /* check the number of EP, since some devices have broken
1297 * descriptors which fool us. if it has only one EP,
1298 * assume it as adaptive-out or sync-in.
1300 attr
= fmt
->ep_attr
& EP_ATTR_MASK
;
1301 if (((is_playback
&& attr
== EP_ATTR_ASYNC
) ||
1302 (! is_playback
&& attr
== EP_ATTR_ADAPTIVE
)) &&
1303 altsd
->bNumEndpoints
>= 2) {
1304 /* check sync-pipe endpoint */
1305 /* ... and check descriptor size before accessing bSynchAddress
1306 because there is a version of the SB Audigy 2 NX firmware lacking
1307 the audio fields in the endpoint descriptors */
1308 if ((get_endpoint(alts
, 1)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) != 0x01 ||
1309 (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1310 get_endpoint(alts
, 1)->bSynchAddress
!= 0)) {
1311 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1312 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1315 ep
= get_endpoint(alts
, 1)->bEndpointAddress
;
1316 if (get_endpoint(alts
, 0)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1317 (( is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
| USB_DIR_IN
)) ||
1318 (!is_playback
&& ep
!= (unsigned int)(get_endpoint(alts
, 0)->bSynchAddress
& ~USB_DIR_IN
)))) {
1319 snd_printk(KERN_ERR
"%d:%d:%d : invalid synch pipe\n",
1320 dev
->devnum
, fmt
->iface
, fmt
->altsetting
);
1323 ep
&= USB_ENDPOINT_NUMBER_MASK
;
1325 subs
->syncpipe
= usb_rcvisocpipe(dev
, ep
);
1327 subs
->syncpipe
= usb_sndisocpipe(dev
, ep
);
1328 if (get_endpoint(alts
, 1)->bLength
>= USB_DT_ENDPOINT_AUDIO_SIZE
&&
1329 get_endpoint(alts
, 1)->bRefresh
>= 1 &&
1330 get_endpoint(alts
, 1)->bRefresh
<= 9)
1331 subs
->syncinterval
= get_endpoint(alts
, 1)->bRefresh
;
1332 else if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
1333 subs
->syncinterval
= 1;
1334 else if (get_endpoint(alts
, 1)->bInterval
>= 1 &&
1335 get_endpoint(alts
, 1)->bInterval
<= 16)
1336 subs
->syncinterval
= get_endpoint(alts
, 1)->bInterval
- 1;
1338 subs
->syncinterval
= 3;
1341 /* always fill max packet size */
1342 if (fmt
->attributes
& EP_CS_ATTR_FILL_MAX
)
1345 if ((err
= init_usb_pitch(dev
, subs
->interface
, alts
, fmt
)) < 0)
1348 subs
->cur_audiofmt
= fmt
;
1351 printk("setting done: format = %d, rate = %d, channels = %d\n",
1352 fmt
->format
, fmt
->rate
, fmt
->channels
);
1353 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1354 subs
->datapipe
, subs
->syncpipe
);
1361 * hw_params callback
1363 * allocate a buffer and set the given audio format.
1365 * so far we use a physically linear buffer although packetize transfer
1366 * doesn't need a continuous area.
1367 * if sg buffer is supported on the later version of alsa, we'll follow
1370 static int snd_usb_hw_params(struct snd_pcm_substream
*substream
,
1371 struct snd_pcm_hw_params
*hw_params
)
1373 struct snd_usb_substream
*subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
1374 struct audioformat
*fmt
;
1375 unsigned int channels
, rate
, format
;
1378 ret
= snd_pcm_alloc_vmalloc_buffer(substream
,
1379 params_buffer_bytes(hw_params
));
1383 format
= params_format(hw_params
);
1384 rate
= params_rate(hw_params
);
1385 channels
= params_channels(hw_params
);
1386 fmt
= find_format(subs
, format
, rate
, channels
);
1388 snd_printd(KERN_DEBUG
"cannot set format: format = 0x%x, rate = %d, channels = %d\n",
1389 format
, rate
, channels
);
1393 changed
= subs
->cur_audiofmt
!= fmt
||
1394 subs
->period_bytes
!= params_period_bytes(hw_params
) ||
1395 subs
->cur_rate
!= rate
;
1396 if ((ret
= set_format(subs
, fmt
)) < 0)
1399 if (subs
->cur_rate
!= rate
) {
1400 struct usb_host_interface
*alts
;
1401 struct usb_interface
*iface
;
1402 iface
= usb_ifnum_to_if(subs
->dev
, fmt
->iface
);
1403 alts
= &iface
->altsetting
[fmt
->altset_idx
];
1404 ret
= init_usb_sample_rate(subs
->dev
, subs
->interface
, alts
, fmt
, rate
);
1407 subs
->cur_rate
= rate
;
1411 /* format changed */
1412 release_substream_urbs(subs
, 0);
1413 /* influenced: period_bytes, channels, rate, format, */
1414 ret
= init_substream_urbs(subs
, params_period_bytes(hw_params
),
1415 params_rate(hw_params
),
1416 snd_pcm_format_physical_width(params_format(hw_params
)) * params_channels(hw_params
));
1425 * reset the audio format and release the buffer
1427 static int snd_usb_hw_free(struct snd_pcm_substream
*substream
)
1429 struct snd_usb_substream
*subs
= (struct snd_usb_substream
*)substream
->runtime
->private_data
;
1431 subs
->cur_audiofmt
= NULL
;
1433 subs
->period_bytes
= 0;
1434 release_substream_urbs(subs
, 0);
1435 return snd_pcm_free_vmalloc_buffer(substream
);
1441 * only a few subtle things...
1443 static int snd_usb_pcm_prepare(struct snd_pcm_substream
*substream
)
1445 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1446 struct snd_usb_substream
*subs
= runtime
->private_data
;
1448 if (! subs
->cur_audiofmt
) {
1449 snd_printk(KERN_ERR
"usbaudio: no format is specified!\n");
1453 /* some unit conversions in runtime */
1454 subs
->maxframesize
= bytes_to_frames(runtime
, subs
->maxpacksize
);
1455 subs
->curframesize
= bytes_to_frames(runtime
, subs
->curpacksize
);
1457 /* reset the pointer */
1458 subs
->hwptr_done
= 0;
1459 subs
->transfer_done
= 0;
1462 /* clear urbs (to be sure) */
1463 deactivate_urbs(subs
, 0, 1);
1464 wait_clear_urbs(subs
);
1466 /* for playback, submit the URBs now; otherwise, the first hwptr_done
1467 * updates for all URBs would happen at the same time when starting */
1468 if (subs
->direction
== SNDRV_PCM_STREAM_PLAYBACK
) {
1469 subs
->ops
.prepare
= prepare_startup_playback_urb
;
1470 return start_urbs(subs
, runtime
);
1475 static struct snd_pcm_hardware snd_usb_playback
=
1477 .info
= SNDRV_PCM_INFO_MMAP
|
1478 SNDRV_PCM_INFO_MMAP_VALID
|
1479 SNDRV_PCM_INFO_BATCH
|
1480 SNDRV_PCM_INFO_INTERLEAVED
|
1481 SNDRV_PCM_INFO_BLOCK_TRANSFER
,
1482 .buffer_bytes_max
= 1024 * 1024,
1483 .period_bytes_min
= 64,
1484 .period_bytes_max
= 512 * 1024,
1486 .periods_max
= 1024,
1489 static struct snd_pcm_hardware snd_usb_capture
=
1491 .info
= SNDRV_PCM_INFO_MMAP
|
1492 SNDRV_PCM_INFO_MMAP_VALID
|
1493 SNDRV_PCM_INFO_BATCH
|
1494 SNDRV_PCM_INFO_INTERLEAVED
|
1495 SNDRV_PCM_INFO_BLOCK_TRANSFER
,
1496 .buffer_bytes_max
= 1024 * 1024,
1497 .period_bytes_min
= 64,
1498 .period_bytes_max
= 512 * 1024,
1500 .periods_max
= 1024,
1507 #ifdef HW_CONST_DEBUG
1508 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1510 #define hwc_debug(fmt, args...) /**/
1513 static int hw_check_valid_format(struct snd_pcm_hw_params
*params
, struct audioformat
*fp
)
1515 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1516 struct snd_interval
*ct
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1517 struct snd_mask
*fmts
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1519 /* check the format */
1520 if (! snd_mask_test(fmts
, fp
->format
)) {
1521 hwc_debug(" > check: no supported format %d\n", fp
->format
);
1524 /* check the channels */
1525 if (fp
->channels
< ct
->min
|| fp
->channels
> ct
->max
) {
1526 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp
->channels
, ct
->min
, ct
->max
);
1529 /* check the rate is within the range */
1530 if (fp
->rate_min
> it
->max
|| (fp
->rate_min
== it
->max
&& it
->openmax
)) {
1531 hwc_debug(" > check: rate_min %d > max %d\n", fp
->rate_min
, it
->max
);
1534 if (fp
->rate_max
< it
->min
|| (fp
->rate_max
== it
->min
&& it
->openmin
)) {
1535 hwc_debug(" > check: rate_max %d < min %d\n", fp
->rate_max
, it
->min
);
1541 static int hw_rule_rate(struct snd_pcm_hw_params
*params
,
1542 struct snd_pcm_hw_rule
*rule
)
1544 struct snd_usb_substream
*subs
= rule
->private;
1545 struct list_head
*p
;
1546 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
1547 unsigned int rmin
, rmax
;
1550 hwc_debug("hw_rule_rate: (%d,%d)\n", it
->min
, it
->max
);
1553 list_for_each(p
, &subs
->fmt_list
) {
1554 struct audioformat
*fp
;
1555 fp
= list_entry(p
, struct audioformat
, list
);
1556 if (! hw_check_valid_format(params
, fp
))
1559 if (rmin
> fp
->rate_min
)
1560 rmin
= fp
->rate_min
;
1561 if (rmax
< fp
->rate_max
)
1562 rmax
= fp
->rate_max
;
1564 rmin
= fp
->rate_min
;
1565 rmax
= fp
->rate_max
;
1570 hwc_debug(" --> get empty\n");
1576 if (it
->min
< rmin
) {
1581 if (it
->max
> rmax
) {
1586 if (snd_interval_checkempty(it
)) {
1590 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1595 static int hw_rule_channels(struct snd_pcm_hw_params
*params
,
1596 struct snd_pcm_hw_rule
*rule
)
1598 struct snd_usb_substream
*subs
= rule
->private;
1599 struct list_head
*p
;
1600 struct snd_interval
*it
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
1601 unsigned int rmin
, rmax
;
1604 hwc_debug("hw_rule_channels: (%d,%d)\n", it
->min
, it
->max
);
1607 list_for_each(p
, &subs
->fmt_list
) {
1608 struct audioformat
*fp
;
1609 fp
= list_entry(p
, struct audioformat
, list
);
1610 if (! hw_check_valid_format(params
, fp
))
1613 if (rmin
> fp
->channels
)
1614 rmin
= fp
->channels
;
1615 if (rmax
< fp
->channels
)
1616 rmax
= fp
->channels
;
1618 rmin
= fp
->channels
;
1619 rmax
= fp
->channels
;
1624 hwc_debug(" --> get empty\n");
1630 if (it
->min
< rmin
) {
1635 if (it
->max
> rmax
) {
1640 if (snd_interval_checkempty(it
)) {
1644 hwc_debug(" --> (%d, %d) (changed = %d)\n", it
->min
, it
->max
, changed
);
1648 static int hw_rule_format(struct snd_pcm_hw_params
*params
,
1649 struct snd_pcm_hw_rule
*rule
)
1651 struct snd_usb_substream
*subs
= rule
->private;
1652 struct list_head
*p
;
1653 struct snd_mask
*fmt
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1658 hwc_debug("hw_rule_format: %x:%x\n", fmt
->bits
[0], fmt
->bits
[1]);
1660 list_for_each(p
, &subs
->fmt_list
) {
1661 struct audioformat
*fp
;
1662 fp
= list_entry(p
, struct audioformat
, list
);
1663 if (! hw_check_valid_format(params
, fp
))
1665 fbits
|= (1ULL << fp
->format
);
1668 oldbits
[0] = fmt
->bits
[0];
1669 oldbits
[1] = fmt
->bits
[1];
1670 fmt
->bits
[0] &= (u32
)fbits
;
1671 fmt
->bits
[1] &= (u32
)(fbits
>> 32);
1672 if (! fmt
->bits
[0] && ! fmt
->bits
[1]) {
1673 hwc_debug(" --> get empty\n");
1676 changed
= (oldbits
[0] != fmt
->bits
[0] || oldbits
[1] != fmt
->bits
[1]);
1677 hwc_debug(" --> %x:%x (changed = %d)\n", fmt
->bits
[0], fmt
->bits
[1], changed
);
1684 * check whether the registered audio formats need special hw-constraints
1686 static int check_hw_params_convention(struct snd_usb_substream
*subs
)
1691 u32 cmaster
, rmaster
;
1692 u32 rate_min
= 0, rate_max
= 0;
1693 struct list_head
*p
;
1696 channels
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1697 rates
= kcalloc(MAX_MASK
, sizeof(u32
), GFP_KERNEL
);
1699 list_for_each(p
, &subs
->fmt_list
) {
1700 struct audioformat
*f
;
1701 f
= list_entry(p
, struct audioformat
, list
);
1702 /* unconventional channels? */
1703 if (f
->channels
> 32)
1705 /* continuous rate min/max matches? */
1706 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1707 if (rate_min
&& f
->rate_min
!= rate_min
)
1709 if (rate_max
&& f
->rate_max
!= rate_max
)
1711 rate_min
= f
->rate_min
;
1712 rate_max
= f
->rate_max
;
1714 /* combination of continuous rates and fixed rates? */
1715 if (rates
[f
->format
] & SNDRV_PCM_RATE_CONTINUOUS
) {
1716 if (f
->rates
!= rates
[f
->format
])
1719 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
1720 if (rates
[f
->format
] && rates
[f
->format
] != f
->rates
)
1723 channels
[f
->format
] |= (1 << f
->channels
);
1724 rates
[f
->format
] |= f
->rates
;
1726 /* check whether channels and rates match for all formats */
1727 cmaster
= rmaster
= 0;
1728 for (i
= 0; i
< MAX_MASK
; i
++) {
1729 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1731 if (rmaster
!= rates
[i
] && rmaster
&& rates
[i
])
1734 cmaster
= channels
[i
];
1738 /* check whether channels match for all distinct rates */
1739 memset(channels
, 0, MAX_MASK
* sizeof(u32
));
1740 list_for_each(p
, &subs
->fmt_list
) {
1741 struct audioformat
*f
;
1742 f
= list_entry(p
, struct audioformat
, list
);
1743 if (f
->rates
& SNDRV_PCM_RATE_CONTINUOUS
)
1745 for (i
= 0; i
< 32; i
++) {
1746 if (f
->rates
& (1 << i
))
1747 channels
[i
] |= (1 << f
->channels
);
1751 for (i
= 0; i
< 32; i
++) {
1752 if (cmaster
!= channels
[i
] && cmaster
&& channels
[i
])
1755 cmaster
= channels
[i
];
1767 * set up the runtime hardware information.
1770 static int setup_hw_info(struct snd_pcm_runtime
*runtime
, struct snd_usb_substream
*subs
)
1772 struct list_head
*p
;
1775 runtime
->hw
.formats
= subs
->formats
;
1777 runtime
->hw
.rate_min
= 0x7fffffff;
1778 runtime
->hw
.rate_max
= 0;
1779 runtime
->hw
.channels_min
= 256;
1780 runtime
->hw
.channels_max
= 0;
1781 runtime
->hw
.rates
= 0;
1782 /* check min/max rates and channels */
1783 list_for_each(p
, &subs
->fmt_list
) {
1784 struct audioformat
*fp
;
1785 fp
= list_entry(p
, struct audioformat
, list
);
1786 runtime
->hw
.rates
|= fp
->rates
;
1787 if (runtime
->hw
.rate_min
> fp
->rate_min
)
1788 runtime
->hw
.rate_min
= fp
->rate_min
;
1789 if (runtime
->hw
.rate_max
< fp
->rate_max
)
1790 runtime
->hw
.rate_max
= fp
->rate_max
;
1791 if (runtime
->hw
.channels_min
> fp
->channels
)
1792 runtime
->hw
.channels_min
= fp
->channels
;
1793 if (runtime
->hw
.channels_max
< fp
->channels
)
1794 runtime
->hw
.channels_max
= fp
->channels
;
1795 if (fp
->fmt_type
== USB_FORMAT_TYPE_II
&& fp
->frame_size
> 0) {
1796 /* FIXME: there might be more than one audio formats... */
1797 runtime
->hw
.period_bytes_min
= runtime
->hw
.period_bytes_max
=
1802 /* set the period time minimum 1ms */
1803 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1804 1000 * MIN_PACKS_URB
,
1805 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX
);
1807 if (check_hw_params_convention(subs
)) {
1808 hwc_debug("setting extra hw constraints...\n");
1809 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1811 SNDRV_PCM_HW_PARAM_FORMAT
,
1812 SNDRV_PCM_HW_PARAM_CHANNELS
,
1815 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1816 hw_rule_channels
, subs
,
1817 SNDRV_PCM_HW_PARAM_FORMAT
,
1818 SNDRV_PCM_HW_PARAM_RATE
,
1821 if ((err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1822 hw_rule_format
, subs
,
1823 SNDRV_PCM_HW_PARAM_RATE
,
1824 SNDRV_PCM_HW_PARAM_CHANNELS
,
1831 static int snd_usb_pcm_open(struct snd_pcm_substream
*substream
, int direction
,
1832 struct snd_pcm_hardware
*hw
)
1834 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
1835 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1836 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
1838 subs
->interface
= -1;
1841 runtime
->private_data
= subs
;
1842 subs
->pcm_substream
= substream
;
1843 return setup_hw_info(runtime
, subs
);
1846 static int snd_usb_pcm_close(struct snd_pcm_substream
*substream
, int direction
)
1848 struct snd_usb_stream
*as
= snd_pcm_substream_chip(substream
);
1849 struct snd_usb_substream
*subs
= &as
->substream
[direction
];
1851 if (subs
->interface
>= 0) {
1852 usb_set_interface(subs
->dev
, subs
->interface
, 0);
1853 subs
->interface
= -1;
1855 subs
->pcm_substream
= NULL
;
1859 static int snd_usb_playback_open(struct snd_pcm_substream
*substream
)
1861 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_PLAYBACK
, &snd_usb_playback
);
1864 static int snd_usb_playback_close(struct snd_pcm_substream
*substream
)
1866 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_PLAYBACK
);
1869 static int snd_usb_capture_open(struct snd_pcm_substream
*substream
)
1871 return snd_usb_pcm_open(substream
, SNDRV_PCM_STREAM_CAPTURE
, &snd_usb_capture
);
1874 static int snd_usb_capture_close(struct snd_pcm_substream
*substream
)
1876 return snd_usb_pcm_close(substream
, SNDRV_PCM_STREAM_CAPTURE
);
1879 static struct snd_pcm_ops snd_usb_playback_ops
= {
1880 .open
= snd_usb_playback_open
,
1881 .close
= snd_usb_playback_close
,
1882 .ioctl
= snd_pcm_lib_ioctl
,
1883 .hw_params
= snd_usb_hw_params
,
1884 .hw_free
= snd_usb_hw_free
,
1885 .prepare
= snd_usb_pcm_prepare
,
1886 .trigger
= snd_usb_pcm_playback_trigger
,
1887 .pointer
= snd_usb_pcm_pointer
,
1888 .page
= snd_pcm_get_vmalloc_page
,
1891 static struct snd_pcm_ops snd_usb_capture_ops
= {
1892 .open
= snd_usb_capture_open
,
1893 .close
= snd_usb_capture_close
,
1894 .ioctl
= snd_pcm_lib_ioctl
,
1895 .hw_params
= snd_usb_hw_params
,
1896 .hw_free
= snd_usb_hw_free
,
1897 .prepare
= snd_usb_pcm_prepare
,
1898 .trigger
= snd_usb_pcm_capture_trigger
,
1899 .pointer
= snd_usb_pcm_pointer
,
1900 .page
= snd_pcm_get_vmalloc_page
,
1910 * combine bytes and get an integer value
1912 unsigned int snd_usb_combine_bytes(unsigned char *bytes
, int size
)
1915 case 1: return *bytes
;
1916 case 2: return combine_word(bytes
);
1917 case 3: return combine_triple(bytes
);
1918 case 4: return combine_quad(bytes
);
1924 * parse descriptor buffer and return the pointer starting the given
1927 void *snd_usb_find_desc(void *descstart
, int desclen
, void *after
, u8 dtype
)
1939 if (p
[1] == dtype
&& (!after
|| (void *)p
> after
)) {
1948 * find a class-specified interface descriptor with the given subtype.
1950 void *snd_usb_find_csint_desc(void *buffer
, int buflen
, void *after
, u8 dsubtype
)
1952 unsigned char *p
= after
;
1954 while ((p
= snd_usb_find_desc(buffer
, buflen
, p
,
1955 USB_DT_CS_INTERFACE
)) != NULL
) {
1956 if (p
[0] >= 3 && p
[2] == dsubtype
)
1963 * Wrapper for usb_control_msg().
1964 * Allocates a temp buffer to prevent dmaing from/to the stack.
1966 int snd_usb_ctl_msg(struct usb_device
*dev
, unsigned int pipe
, __u8 request
,
1967 __u8 requesttype
, __u16 value
, __u16 index
, void *data
,
1968 __u16 size
, int timeout
)
1974 buf
= kmalloc(size
, GFP_KERNEL
);
1977 memcpy(buf
, data
, size
);
1979 err
= usb_control_msg(dev
, pipe
, request
, requesttype
,
1980 value
, index
, buf
, size
, timeout
);
1982 memcpy(data
, buf
, size
);
1990 * entry point for linux usb interface
1993 static int usb_audio_probe(struct usb_interface
*intf
,
1994 const struct usb_device_id
*id
);
1995 static void usb_audio_disconnect(struct usb_interface
*intf
);
1997 static struct usb_device_id usb_audio_ids
[] = {
1998 #include "usbquirks.h"
1999 { .match_flags
= (USB_DEVICE_ID_MATCH_INT_CLASS
| USB_DEVICE_ID_MATCH_INT_SUBCLASS
),
2000 .bInterfaceClass
= USB_CLASS_AUDIO
,
2001 .bInterfaceSubClass
= USB_SUBCLASS_AUDIO_CONTROL
},
2002 { } /* Terminating entry */
2005 MODULE_DEVICE_TABLE (usb
, usb_audio_ids
);
2007 static struct usb_driver usb_audio_driver
= {
2008 .name
= "snd-usb-audio",
2009 .probe
= usb_audio_probe
,
2010 .disconnect
= usb_audio_disconnect
,
2011 .id_table
= usb_audio_ids
,
2015 #if defined(CONFIG_PROCFS) && defined(CONFIG_SND_VERBOSE_PROCFS)
2018 * proc interface for list the supported pcm formats
2020 static void proc_dump_substream_formats(struct snd_usb_substream
*subs
, struct snd_info_buffer
*buffer
)
2022 struct list_head
*p
;
2023 static char *sync_types
[4] = {
2024 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2027 list_for_each(p
, &subs
->fmt_list
) {
2028 struct audioformat
*fp
;
2029 fp
= list_entry(p
, struct audioformat
, list
);
2030 snd_iprintf(buffer
, " Interface %d\n", fp
->iface
);
2031 snd_iprintf(buffer
, " Altset %d\n", fp
->altsetting
);
2032 snd_iprintf(buffer
, " Format: %s\n", snd_pcm_format_name(fp
->format
));
2033 snd_iprintf(buffer
, " Channels: %d\n", fp
->channels
);
2034 snd_iprintf(buffer
, " Endpoint: %d %s (%s)\n",
2035 fp
->endpoint
& USB_ENDPOINT_NUMBER_MASK
,
2036 fp
->endpoint
& USB_DIR_IN
? "IN" : "OUT",
2037 sync_types
[(fp
->ep_attr
& EP_ATTR_MASK
) >> 2]);
2038 if (fp
->rates
& SNDRV_PCM_RATE_CONTINUOUS
) {
2039 snd_iprintf(buffer
, " Rates: %d - %d (continuous)\n",
2040 fp
->rate_min
, fp
->rate_max
);
2043 snd_iprintf(buffer
, " Rates: ");
2044 for (i
= 0; i
< fp
->nr_rates
; i
++) {
2046 snd_iprintf(buffer
, ", ");
2047 snd_iprintf(buffer
, "%d", fp
->rate_table
[i
]);
2049 snd_iprintf(buffer
, "\n");
2051 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
2052 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
2056 static void proc_dump_substream_status(struct snd_usb_substream
*subs
, struct snd_info_buffer
*buffer
)
2058 if (subs
->running
) {
2060 snd_iprintf(buffer
, " Status: Running\n");
2061 snd_iprintf(buffer
, " Interface = %d\n", subs
->interface
);
2062 snd_iprintf(buffer
, " Altset = %d\n", subs
->format
);
2063 snd_iprintf(buffer
, " URBs = %d [ ", subs
->nurbs
);
2064 for (i
= 0; i
< subs
->nurbs
; i
++)
2065 snd_iprintf(buffer
, "%d ", subs
->dataurb
[i
].packets
);
2066 snd_iprintf(buffer
, "]\n");
2067 snd_iprintf(buffer
, " Packet Size = %d\n", subs
->curpacksize
);
2068 snd_iprintf(buffer
, " Momentary freq = %u Hz (%#x.%04x)\n",
2069 snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
2070 ? get_full_speed_hz(subs
->freqm
)
2071 : get_high_speed_hz(subs
->freqm
),
2072 subs
->freqm
>> 16, subs
->freqm
& 0xffff);
2074 snd_iprintf(buffer
, " Status: Stop\n");
2078 static void proc_pcm_format_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
2080 struct snd_usb_stream
*stream
= entry
->private_data
;
2082 snd_iprintf(buffer
, "%s : %s\n", stream
->chip
->card
->longname
, stream
->pcm
->name
);
2084 if (stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
].num_formats
) {
2085 snd_iprintf(buffer
, "\nPlayback:\n");
2086 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2087 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_PLAYBACK
], buffer
);
2089 if (stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
].num_formats
) {
2090 snd_iprintf(buffer
, "\nCapture:\n");
2091 proc_dump_substream_status(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2092 proc_dump_substream_formats(&stream
->substream
[SNDRV_PCM_STREAM_CAPTURE
], buffer
);
2096 static void proc_pcm_format_add(struct snd_usb_stream
*stream
)
2098 struct snd_info_entry
*entry
;
2100 struct snd_card
*card
= stream
->chip
->card
;
2102 sprintf(name
, "stream%d", stream
->pcm_index
);
2103 if (! snd_card_proc_new(card
, name
, &entry
))
2104 snd_info_set_text_ops(entry
, stream
, 1024, proc_pcm_format_read
);
2109 static inline void proc_pcm_format_add(struct snd_usb_stream
*stream
)
2116 * initialize the substream instance.
2119 static void init_substream(struct snd_usb_stream
*as
, int stream
, struct audioformat
*fp
)
2121 struct snd_usb_substream
*subs
= &as
->substream
[stream
];
2123 INIT_LIST_HEAD(&subs
->fmt_list
);
2124 spin_lock_init(&subs
->lock
);
2127 subs
->direction
= stream
;
2128 subs
->dev
= as
->chip
->dev
;
2129 if (snd_usb_get_speed(subs
->dev
) == USB_SPEED_FULL
)
2130 subs
->ops
= audio_urb_ops
[stream
];
2132 subs
->ops
= audio_urb_ops_high_speed
[stream
];
2133 snd_pcm_set_ops(as
->pcm
, stream
,
2134 stream
== SNDRV_PCM_STREAM_PLAYBACK
?
2135 &snd_usb_playback_ops
: &snd_usb_capture_ops
);
2137 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2138 subs
->formats
|= 1ULL << fp
->format
;
2139 subs
->endpoint
= fp
->endpoint
;
2140 subs
->num_formats
++;
2141 subs
->fmt_type
= fp
->fmt_type
;
2148 static void free_substream(struct snd_usb_substream
*subs
)
2150 struct list_head
*p
, *n
;
2152 if (! subs
->num_formats
)
2153 return; /* not initialized */
2154 list_for_each_safe(p
, n
, &subs
->fmt_list
) {
2155 struct audioformat
*fp
= list_entry(p
, struct audioformat
, list
);
2156 kfree(fp
->rate_table
);
2163 * free a usb stream instance
2165 static void snd_usb_audio_stream_free(struct snd_usb_stream
*stream
)
2167 free_substream(&stream
->substream
[0]);
2168 free_substream(&stream
->substream
[1]);
2169 list_del(&stream
->list
);
2173 static void snd_usb_audio_pcm_free(struct snd_pcm
*pcm
)
2175 struct snd_usb_stream
*stream
= pcm
->private_data
;
2178 snd_usb_audio_stream_free(stream
);
2184 * add this endpoint to the chip instance.
2185 * if a stream with the same endpoint already exists, append to it.
2186 * if not, create a new pcm stream.
2188 static int add_audio_endpoint(struct snd_usb_audio
*chip
, int stream
, struct audioformat
*fp
)
2190 struct list_head
*p
;
2191 struct snd_usb_stream
*as
;
2192 struct snd_usb_substream
*subs
;
2193 struct snd_pcm
*pcm
;
2196 list_for_each(p
, &chip
->pcm_list
) {
2197 as
= list_entry(p
, struct snd_usb_stream
, list
);
2198 if (as
->fmt_type
!= fp
->fmt_type
)
2200 subs
= &as
->substream
[stream
];
2201 if (! subs
->endpoint
)
2203 if (subs
->endpoint
== fp
->endpoint
) {
2204 list_add_tail(&fp
->list
, &subs
->fmt_list
);
2205 subs
->num_formats
++;
2206 subs
->formats
|= 1ULL << fp
->format
;
2210 /* look for an empty stream */
2211 list_for_each(p
, &chip
->pcm_list
) {
2212 as
= list_entry(p
, struct snd_usb_stream
, list
);
2213 if (as
->fmt_type
!= fp
->fmt_type
)
2215 subs
= &as
->substream
[stream
];
2218 err
= snd_pcm_new_stream(as
->pcm
, stream
, 1);
2221 init_substream(as
, stream
, fp
);
2225 /* create a new pcm */
2226 as
= kmalloc(sizeof(*as
), GFP_KERNEL
);
2229 memset(as
, 0, sizeof(*as
));
2230 as
->pcm_index
= chip
->pcm_devs
;
2232 as
->fmt_type
= fp
->fmt_type
;
2233 err
= snd_pcm_new(chip
->card
, "USB Audio", chip
->pcm_devs
,
2234 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 1 : 0,
2235 stream
== SNDRV_PCM_STREAM_PLAYBACK
? 0 : 1,
2242 pcm
->private_data
= as
;
2243 pcm
->private_free
= snd_usb_audio_pcm_free
;
2244 pcm
->info_flags
= 0;
2245 if (chip
->pcm_devs
> 0)
2246 sprintf(pcm
->name
, "USB Audio #%d", chip
->pcm_devs
);
2248 strcpy(pcm
->name
, "USB Audio");
2250 init_substream(as
, stream
, fp
);
2252 list_add(&as
->list
, &chip
->pcm_list
);
2255 proc_pcm_format_add(as
);
2262 * check if the device uses big-endian samples
2264 static int is_big_endian_format(struct snd_usb_audio
*chip
, struct audioformat
*fp
)
2266 switch (chip
->usb_id
) {
2267 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2268 if (fp
->endpoint
& USB_DIR_IN
)
2271 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2278 * parse the audio format type I descriptor
2279 * and returns the corresponding pcm format
2282 * @fp: audioformat record
2283 * @format: the format tag (wFormatTag)
2284 * @fmt: the format type descriptor
2286 static int parse_audio_format_i_type(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2287 int format
, unsigned char *fmt
)
2290 int sample_width
, sample_bytes
;
2292 /* FIXME: correct endianess and sign? */
2294 sample_width
= fmt
[6];
2295 sample_bytes
= fmt
[5];
2297 case 0: /* some devices don't define this correctly... */
2298 snd_printdd(KERN_INFO
"%d:%u:%d : format type 0 is detected, processed as PCM\n",
2299 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2301 case USB_AUDIO_FORMAT_PCM
:
2302 if (sample_width
> sample_bytes
* 8) {
2303 snd_printk(KERN_INFO
"%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2304 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
,
2305 sample_width
, sample_bytes
);
2307 /* check the format byte size */
2310 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2313 if (is_big_endian_format(chip
, fp
))
2314 pcm_format
= SNDRV_PCM_FORMAT_S16_BE
; /* grrr, big endian!! */
2316 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2319 if (is_big_endian_format(chip
, fp
))
2320 pcm_format
= SNDRV_PCM_FORMAT_S24_3BE
; /* grrr, big endian!! */
2322 pcm_format
= SNDRV_PCM_FORMAT_S24_3LE
;
2325 pcm_format
= SNDRV_PCM_FORMAT_S32_LE
;
2328 snd_printk(KERN_INFO
"%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2329 chip
->dev
->devnum
, fp
->iface
,
2330 fp
->altsetting
, sample_width
, sample_bytes
);
2334 case USB_AUDIO_FORMAT_PCM8
:
2335 /* Dallas DS4201 workaround */
2336 if (chip
->usb_id
== USB_ID(0x04fa, 0x4201))
2337 pcm_format
= SNDRV_PCM_FORMAT_S8
;
2339 pcm_format
= SNDRV_PCM_FORMAT_U8
;
2341 case USB_AUDIO_FORMAT_IEEE_FLOAT
:
2342 pcm_format
= SNDRV_PCM_FORMAT_FLOAT_LE
;
2344 case USB_AUDIO_FORMAT_ALAW
:
2345 pcm_format
= SNDRV_PCM_FORMAT_A_LAW
;
2347 case USB_AUDIO_FORMAT_MU_LAW
:
2348 pcm_format
= SNDRV_PCM_FORMAT_MU_LAW
;
2351 snd_printk(KERN_INFO
"%d:%u:%d : unsupported format type %d\n",
2352 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2360 * parse the format descriptor and stores the possible sample rates
2361 * on the audioformat table.
2364 * @fp: audioformat record
2365 * @fmt: the format descriptor
2366 * @offset: the start offset of descriptor pointing the rate type
2367 * (7 for type I and II, 8 for type II)
2369 static int parse_audio_format_rates(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2370 unsigned char *fmt
, int offset
)
2372 int nr_rates
= fmt
[offset
];
2373 if (fmt
[0] < offset
+ 1 + 3 * (nr_rates
? nr_rates
: 2)) {
2374 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2375 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
);
2381 * build the rate table and bitmap flags
2384 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2385 static unsigned int conv_rates
[] = {
2386 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2387 64000, 88200, 96000, 176400, 192000
2389 fp
->rate_table
= kmalloc(sizeof(int) * nr_rates
, GFP_KERNEL
);
2390 if (fp
->rate_table
== NULL
) {
2391 snd_printk(KERN_ERR
"cannot malloc\n");
2395 fp
->nr_rates
= nr_rates
;
2396 fp
->rate_min
= fp
->rate_max
= combine_triple(&fmt
[8]);
2397 for (r
= 0, idx
= offset
+ 1; r
< nr_rates
; r
++, idx
+= 3) {
2398 unsigned int rate
= fp
->rate_table
[r
] = combine_triple(&fmt
[idx
]);
2399 if (rate
< fp
->rate_min
)
2400 fp
->rate_min
= rate
;
2401 else if (rate
> fp
->rate_max
)
2402 fp
->rate_max
= rate
;
2403 for (c
= 0; c
< (int)ARRAY_SIZE(conv_rates
); c
++) {
2404 if (rate
== conv_rates
[c
]) {
2405 fp
->rates
|= (1 << c
);
2411 /* continuous rates */
2412 fp
->rates
= SNDRV_PCM_RATE_CONTINUOUS
;
2413 fp
->rate_min
= combine_triple(&fmt
[offset
+ 1]);
2414 fp
->rate_max
= combine_triple(&fmt
[offset
+ 4]);
2420 * parse the format type I and III descriptors
2422 static int parse_audio_format_i(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2423 int format
, unsigned char *fmt
)
2427 if (fmt
[3] == USB_FORMAT_TYPE_III
) {
2428 /* FIXME: the format type is really IECxxx
2429 * but we give normal PCM format to get the existing
2432 pcm_format
= SNDRV_PCM_FORMAT_S16_LE
;
2434 pcm_format
= parse_audio_format_i_type(chip
, fp
, format
, fmt
);
2438 fp
->format
= pcm_format
;
2439 fp
->channels
= fmt
[4];
2440 if (fp
->channels
< 1) {
2441 snd_printk(KERN_ERR
"%d:%u:%d : invalid channels %d\n",
2442 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fp
->channels
);
2445 return parse_audio_format_rates(chip
, fp
, fmt
, 7);
2449 * prase the format type II descriptor
2451 static int parse_audio_format_ii(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2452 int format
, unsigned char *fmt
)
2454 int brate
, framesize
;
2456 case USB_AUDIO_FORMAT_AC3
:
2457 /* FIXME: there is no AC3 format defined yet */
2458 // fp->format = SNDRV_PCM_FORMAT_AC3;
2459 fp
->format
= SNDRV_PCM_FORMAT_U8
; /* temporarily hack to receive byte streams */
2461 case USB_AUDIO_FORMAT_MPEG
:
2462 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2465 snd_printd(KERN_INFO
"%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
2466 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, format
);
2467 fp
->format
= SNDRV_PCM_FORMAT_MPEG
;
2471 brate
= combine_word(&fmt
[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2472 framesize
= combine_word(&fmt
[6]); /* fmt[6,7]: wSamplesPerFrame */
2473 snd_printd(KERN_INFO
"found format II with max.bitrate = %d, frame size=%d\n", brate
, framesize
);
2474 fp
->frame_size
= framesize
;
2475 return parse_audio_format_rates(chip
, fp
, fmt
, 8); /* fmt[8..] sample rates */
2478 static int parse_audio_format(struct snd_usb_audio
*chip
, struct audioformat
*fp
,
2479 int format
, unsigned char *fmt
, int stream
)
2484 case USB_FORMAT_TYPE_I
:
2485 case USB_FORMAT_TYPE_III
:
2486 err
= parse_audio_format_i(chip
, fp
, format
, fmt
);
2488 case USB_FORMAT_TYPE_II
:
2489 err
= parse_audio_format_ii(chip
, fp
, format
, fmt
);
2492 snd_printd(KERN_INFO
"%d:%u:%d : format type %d is not supported yet\n",
2493 chip
->dev
->devnum
, fp
->iface
, fp
->altsetting
, fmt
[3]);
2496 fp
->fmt_type
= fmt
[3];
2500 /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
2501 /* extigy apparently supports sample rates other than 48k
2502 * but not in ordinary way. so we enable only 48k atm.
2504 if (chip
->usb_id
== USB_ID(0x041e, 0x3000) ||
2505 chip
->usb_id
== USB_ID(0x041e, 0x3020) ||
2506 chip
->usb_id
== USB_ID(0x041e, 0x3061)) {
2507 if (fmt
[3] == USB_FORMAT_TYPE_I
&&
2508 fp
->rates
!= SNDRV_PCM_RATE_48000
&&
2509 fp
->rates
!= SNDRV_PCM_RATE_96000
)
2516 static int parse_audio_endpoints(struct snd_usb_audio
*chip
, int iface_no
)
2518 struct usb_device
*dev
;
2519 struct usb_interface
*iface
;
2520 struct usb_host_interface
*alts
;
2521 struct usb_interface_descriptor
*altsd
;
2522 int i
, altno
, err
, stream
;
2524 struct audioformat
*fp
;
2525 unsigned char *fmt
, *csep
;
2529 /* parse the interface's altsettings */
2530 iface
= usb_ifnum_to_if(dev
, iface_no
);
2531 for (i
= 0; i
< iface
->num_altsetting
; i
++) {
2532 alts
= &iface
->altsetting
[i
];
2533 altsd
= get_iface_desc(alts
);
2534 /* skip invalid one */
2535 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2536 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2537 (altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
&&
2538 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_VENDOR_SPEC
) ||
2539 altsd
->bNumEndpoints
< 1 ||
2540 le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
) == 0)
2542 /* must be isochronous */
2543 if ((get_endpoint(alts
, 0)->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) !=
2544 USB_ENDPOINT_XFER_ISOC
)
2546 /* check direction */
2547 stream
= (get_endpoint(alts
, 0)->bEndpointAddress
& USB_DIR_IN
) ?
2548 SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2549 altno
= altsd
->bAlternateSetting
;
2551 /* get audio formats */
2552 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, AS_GENERAL
);
2554 snd_printk(KERN_ERR
"%d:%u:%d : AS_GENERAL descriptor not found\n",
2555 dev
->devnum
, iface_no
, altno
);
2560 snd_printk(KERN_ERR
"%d:%u:%d : invalid AS_GENERAL desc\n",
2561 dev
->devnum
, iface_no
, altno
);
2565 format
= (fmt
[6] << 8) | fmt
[5]; /* remember the format value */
2567 /* get format type */
2568 fmt
= snd_usb_find_csint_desc(alts
->extra
, alts
->extralen
, NULL
, FORMAT_TYPE
);
2570 snd_printk(KERN_ERR
"%d:%u:%d : no FORMAT_TYPE desc\n",
2571 dev
->devnum
, iface_no
, altno
);
2575 snd_printk(KERN_ERR
"%d:%u:%d : invalid FORMAT_TYPE desc\n",
2576 dev
->devnum
, iface_no
, altno
);
2580 csep
= snd_usb_find_desc(alts
->endpoint
[0].extra
, alts
->endpoint
[0].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2581 /* Creamware Noah has this descriptor after the 2nd endpoint */
2582 if (!csep
&& altsd
->bNumEndpoints
>= 2)
2583 csep
= snd_usb_find_desc(alts
->endpoint
[1].extra
, alts
->endpoint
[1].extralen
, NULL
, USB_DT_CS_ENDPOINT
);
2584 if (!csep
|| csep
[0] < 7 || csep
[2] != EP_GENERAL
) {
2585 snd_printk(KERN_ERR
"%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2586 dev
->devnum
, iface_no
, altno
);
2590 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2592 snd_printk(KERN_ERR
"cannot malloc\n");
2596 memset(fp
, 0, sizeof(*fp
));
2597 fp
->iface
= iface_no
;
2598 fp
->altsetting
= altno
;
2600 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2601 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2602 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2603 if (snd_usb_get_speed(dev
) == USB_SPEED_HIGH
)
2604 fp
->maxpacksize
= (((fp
->maxpacksize
>> 11) & 3) + 1)
2605 * (fp
->maxpacksize
& 0x7ff);
2606 fp
->attributes
= csep
[3];
2608 /* some quirks for attributes here */
2610 switch (chip
->usb_id
) {
2611 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2612 /* Optoplay sets the sample rate attribute although
2613 * it seems not supporting it in fact.
2615 fp
->attributes
&= ~EP_CS_ATTR_SAMPLE_RATE
;
2617 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2618 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2619 /* doesn't set the sample rate attribute, but supports it */
2620 fp
->attributes
|= EP_CS_ATTR_SAMPLE_RATE
;
2622 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2623 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2624 an older model 77d:223) */
2626 * plantronics headset and Griffin iMic have set adaptive-in
2627 * although it's really not...
2629 fp
->ep_attr
&= ~EP_ATTR_MASK
;
2630 if (stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2631 fp
->ep_attr
|= EP_ATTR_ADAPTIVE
;
2633 fp
->ep_attr
|= EP_ATTR_SYNC
;
2637 /* ok, let's parse further... */
2638 if (parse_audio_format(chip
, fp
, format
, fmt
, stream
) < 0) {
2639 kfree(fp
->rate_table
);
2644 snd_printdd(KERN_INFO
"%d:%u:%d: add audio endpoint 0x%x\n", dev
->devnum
, iface_no
, i
, fp
->endpoint
);
2645 err
= add_audio_endpoint(chip
, stream
, fp
);
2647 kfree(fp
->rate_table
);
2651 /* try to set the interface... */
2652 usb_set_interface(chip
->dev
, iface_no
, altno
);
2653 init_usb_pitch(chip
->dev
, iface_no
, alts
, fp
);
2654 init_usb_sample_rate(chip
->dev
, iface_no
, alts
, fp
, fp
->rate_max
);
2661 * disconnect streams
2662 * called from snd_usb_audio_disconnect()
2664 static void snd_usb_stream_disconnect(struct list_head
*head
)
2667 struct snd_usb_stream
*as
;
2668 struct snd_usb_substream
*subs
;
2670 as
= list_entry(head
, struct snd_usb_stream
, list
);
2671 for (idx
= 0; idx
< 2; idx
++) {
2672 subs
= &as
->substream
[idx
];
2673 if (!subs
->num_formats
)
2675 release_substream_urbs(subs
, 1);
2676 subs
->interface
= -1;
2681 * parse audio control descriptor and create pcm/midi streams
2683 static int snd_usb_create_streams(struct snd_usb_audio
*chip
, int ctrlif
)
2685 struct usb_device
*dev
= chip
->dev
;
2686 struct usb_host_interface
*host_iface
;
2687 struct usb_interface
*iface
;
2691 /* find audiocontrol interface */
2692 host_iface
= &usb_ifnum_to_if(dev
, ctrlif
)->altsetting
[0];
2693 if (!(p1
= snd_usb_find_csint_desc(host_iface
->extra
, host_iface
->extralen
, NULL
, HEADER
))) {
2694 snd_printk(KERN_ERR
"cannot find HEADER\n");
2697 if (! p1
[7] || p1
[0] < 8 + p1
[7]) {
2698 snd_printk(KERN_ERR
"invalid HEADER\n");
2703 * parse all USB audio streaming interfaces
2705 for (i
= 0; i
< p1
[7]; i
++) {
2706 struct usb_host_interface
*alts
;
2707 struct usb_interface_descriptor
*altsd
;
2709 iface
= usb_ifnum_to_if(dev
, j
);
2711 snd_printk(KERN_ERR
"%d:%u:%d : does not exist\n",
2712 dev
->devnum
, ctrlif
, j
);
2715 if (usb_interface_claimed(iface
)) {
2716 snd_printdd(KERN_INFO
"%d:%d:%d: skipping, already claimed\n", dev
->devnum
, ctrlif
, j
);
2719 alts
= &iface
->altsetting
[0];
2720 altsd
= get_iface_desc(alts
);
2721 if ((altsd
->bInterfaceClass
== USB_CLASS_AUDIO
||
2722 altsd
->bInterfaceClass
== USB_CLASS_VENDOR_SPEC
) &&
2723 altsd
->bInterfaceSubClass
== USB_SUBCLASS_MIDI_STREAMING
) {
2724 if (snd_usb_create_midi_interface(chip
, iface
, NULL
) < 0) {
2725 snd_printk(KERN_ERR
"%d:%u:%d: cannot create sequencer device\n", dev
->devnum
, ctrlif
, j
);
2728 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2731 if ((altsd
->bInterfaceClass
!= USB_CLASS_AUDIO
&&
2732 altsd
->bInterfaceClass
!= USB_CLASS_VENDOR_SPEC
) ||
2733 altsd
->bInterfaceSubClass
!= USB_SUBCLASS_AUDIO_STREAMING
) {
2734 snd_printdd(KERN_ERR
"%d:%u:%d: skipping non-supported interface %d\n", dev
->devnum
, ctrlif
, j
, altsd
->bInterfaceClass
);
2735 /* skip non-supported classes */
2738 if (! parse_audio_endpoints(chip
, j
)) {
2739 usb_set_interface(dev
, j
, 0); /* reset the current interface */
2740 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2748 * create a stream for an endpoint/altsetting without proper descriptors
2750 static int create_fixed_stream_quirk(struct snd_usb_audio
*chip
,
2751 struct usb_interface
*iface
,
2752 const struct snd_usb_audio_quirk
*quirk
)
2754 struct audioformat
*fp
;
2755 struct usb_host_interface
*alts
;
2757 int *rate_table
= NULL
;
2759 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2761 snd_printk(KERN_ERR
"cannot malloc\n");
2764 memcpy(fp
, quirk
->data
, sizeof(*fp
));
2765 if (fp
->nr_rates
> 0) {
2766 rate_table
= kmalloc(sizeof(int) * fp
->nr_rates
, GFP_KERNEL
);
2771 memcpy(rate_table
, fp
->rate_table
, sizeof(int) * fp
->nr_rates
);
2772 fp
->rate_table
= rate_table
;
2775 stream
= (fp
->endpoint
& USB_DIR_IN
)
2776 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2777 err
= add_audio_endpoint(chip
, stream
, fp
);
2783 if (fp
->iface
!= get_iface_desc(&iface
->altsetting
[0])->bInterfaceNumber
||
2784 fp
->altset_idx
>= iface
->num_altsetting
) {
2789 alts
= &iface
->altsetting
[fp
->altset_idx
];
2790 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2791 init_usb_pitch(chip
->dev
, fp
->iface
, alts
, fp
);
2792 init_usb_sample_rate(chip
->dev
, fp
->iface
, alts
, fp
, fp
->rate_max
);
2797 * create a stream for an interface with proper descriptors
2799 static int create_standard_audio_quirk(struct snd_usb_audio
*chip
,
2800 struct usb_interface
*iface
,
2801 const struct snd_usb_audio_quirk
*quirk
)
2803 struct usb_host_interface
*alts
;
2804 struct usb_interface_descriptor
*altsd
;
2807 alts
= &iface
->altsetting
[0];
2808 altsd
= get_iface_desc(alts
);
2809 err
= parse_audio_endpoints(chip
, altsd
->bInterfaceNumber
);
2811 snd_printk(KERN_ERR
"cannot setup if %d: error %d\n",
2812 altsd
->bInterfaceNumber
, err
);
2815 /* reset the current interface */
2816 usb_set_interface(chip
->dev
, altsd
->bInterfaceNumber
, 0);
2821 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2822 * to detect the sample rate is by looking at wMaxPacketSize.
2824 static int create_ua700_ua25_quirk(struct snd_usb_audio
*chip
,
2825 struct usb_interface
*iface
,
2826 const struct snd_usb_audio_quirk
*quirk
)
2828 static const struct audioformat ua_format
= {
2829 .format
= SNDRV_PCM_FORMAT_S24_3LE
,
2831 .fmt_type
= USB_FORMAT_TYPE_I
,
2834 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2836 struct usb_host_interface
*alts
;
2837 struct usb_interface_descriptor
*altsd
;
2838 struct audioformat
*fp
;
2841 /* both PCM and MIDI interfaces have 2 altsettings */
2842 if (iface
->num_altsetting
!= 2)
2844 alts
= &iface
->altsetting
[1];
2845 altsd
= get_iface_desc(alts
);
2847 if (altsd
->bNumEndpoints
== 2) {
2848 static const struct snd_usb_midi_endpoint_info ua700_ep
= {
2849 .out_cables
= 0x0003,
2852 static const struct snd_usb_audio_quirk ua700_quirk
= {
2853 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2856 static const struct snd_usb_midi_endpoint_info ua25_ep
= {
2857 .out_cables
= 0x0001,
2860 static const struct snd_usb_audio_quirk ua25_quirk
= {
2861 .type
= QUIRK_MIDI_FIXED_ENDPOINT
,
2864 if (chip
->usb_id
== USB_ID(0x0582, 0x002b))
2865 return snd_usb_create_midi_interface(chip
, iface
,
2868 return snd_usb_create_midi_interface(chip
, iface
,
2872 if (altsd
->bNumEndpoints
!= 1)
2875 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2878 memcpy(fp
, &ua_format
, sizeof(*fp
));
2880 fp
->iface
= altsd
->bInterfaceNumber
;
2881 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2882 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2883 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2885 switch (fp
->maxpacksize
) {
2887 fp
->rate_max
= fp
->rate_min
= 44100;
2891 fp
->rate_max
= fp
->rate_min
= 48000;
2895 fp
->rate_max
= fp
->rate_min
= 96000;
2898 snd_printk(KERN_ERR
"unknown sample rate\n");
2903 stream
= (fp
->endpoint
& USB_DIR_IN
)
2904 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2905 err
= add_audio_endpoint(chip
, stream
, fp
);
2910 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2915 * Create a stream for an Edirol UA-1000 interface.
2917 static int create_ua1000_quirk(struct snd_usb_audio
*chip
,
2918 struct usb_interface
*iface
,
2919 const struct snd_usb_audio_quirk
*quirk
)
2921 static const struct audioformat ua1000_format
= {
2922 .format
= SNDRV_PCM_FORMAT_S32_LE
,
2923 .fmt_type
= USB_FORMAT_TYPE_I
,
2927 .rates
= SNDRV_PCM_RATE_CONTINUOUS
,
2929 struct usb_host_interface
*alts
;
2930 struct usb_interface_descriptor
*altsd
;
2931 struct audioformat
*fp
;
2934 if (iface
->num_altsetting
!= 2)
2936 alts
= &iface
->altsetting
[1];
2937 altsd
= get_iface_desc(alts
);
2938 if (alts
->extralen
!= 11 || alts
->extra
[1] != CS_AUDIO_INTERFACE
||
2939 altsd
->bNumEndpoints
!= 1)
2942 fp
= kmalloc(sizeof(*fp
), GFP_KERNEL
);
2945 memcpy(fp
, &ua1000_format
, sizeof(*fp
));
2947 fp
->channels
= alts
->extra
[4];
2948 fp
->iface
= altsd
->bInterfaceNumber
;
2949 fp
->endpoint
= get_endpoint(alts
, 0)->bEndpointAddress
;
2950 fp
->ep_attr
= get_endpoint(alts
, 0)->bmAttributes
;
2951 fp
->maxpacksize
= le16_to_cpu(get_endpoint(alts
, 0)->wMaxPacketSize
);
2952 fp
->rate_max
= fp
->rate_min
= combine_triple(&alts
->extra
[8]);
2954 stream
= (fp
->endpoint
& USB_DIR_IN
)
2955 ? SNDRV_PCM_STREAM_CAPTURE
: SNDRV_PCM_STREAM_PLAYBACK
;
2956 err
= add_audio_endpoint(chip
, stream
, fp
);
2961 /* FIXME: playback must be synchronized to capture */
2962 usb_set_interface(chip
->dev
, fp
->iface
, 0);
2966 static int snd_usb_create_quirk(struct snd_usb_audio
*chip
,
2967 struct usb_interface
*iface
,
2968 const struct snd_usb_audio_quirk
*quirk
);
2971 * handle the quirks for the contained interfaces
2973 static int create_composite_quirk(struct snd_usb_audio
*chip
,
2974 struct usb_interface
*iface
,
2975 const struct snd_usb_audio_quirk
*quirk
)
2977 int probed_ifnum
= get_iface_desc(iface
->altsetting
)->bInterfaceNumber
;
2980 for (quirk
= quirk
->data
; quirk
->ifnum
>= 0; ++quirk
) {
2981 iface
= usb_ifnum_to_if(chip
->dev
, quirk
->ifnum
);
2984 if (quirk
->ifnum
!= probed_ifnum
&&
2985 usb_interface_claimed(iface
))
2987 err
= snd_usb_create_quirk(chip
, iface
, quirk
);
2990 if (quirk
->ifnum
!= probed_ifnum
)
2991 usb_driver_claim_interface(&usb_audio_driver
, iface
, (void *)-1L);
2996 static int ignore_interface_quirk(struct snd_usb_audio
*chip
,
2997 struct usb_interface
*iface
,
2998 const struct snd_usb_audio_quirk
*quirk
)
3008 #define EXTIGY_FIRMWARE_SIZE_OLD 794
3009 #define EXTIGY_FIRMWARE_SIZE_NEW 483
3011 static int snd_usb_extigy_boot_quirk(struct usb_device
*dev
, struct usb_interface
*intf
)
3013 struct usb_host_config
*config
= dev
->actconfig
;
3016 if (le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_OLD
||
3017 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
) == EXTIGY_FIRMWARE_SIZE_NEW
) {
3018 snd_printdd("sending Extigy boot sequence...\n");
3019 /* Send message to force it to reconnect with full interface. */
3020 err
= snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
,0),
3021 0x10, 0x43, 0x0001, 0x000a, NULL
, 0, 1000);
3022 if (err
< 0) snd_printdd("error sending boot message: %d\n", err
);
3023 err
= usb_get_descriptor(dev
, USB_DT_DEVICE
, 0,
3024 &dev
->descriptor
, sizeof(dev
->descriptor
));
3025 config
= dev
->actconfig
;
3026 if (err
< 0) snd_printdd("error usb_get_descriptor: %d\n", err
);
3027 err
= usb_reset_configuration(dev
);
3028 if (err
< 0) snd_printdd("error usb_reset_configuration: %d\n", err
);
3029 snd_printdd("extigy_boot: new boot length = %d\n",
3030 le16_to_cpu(get_cfg_desc(config
)->wTotalLength
));
3031 return -ENODEV
; /* quit this anyway */
3036 static int snd_usb_audigy2nx_boot_quirk(struct usb_device
*dev
)
3040 snd_usb_ctl_msg(dev
, usb_rcvctrlpipe(dev
, 0), 0x2a,
3041 USB_DIR_IN
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3042 0, 0, &buf
, 1, 1000);
3044 snd_usb_ctl_msg(dev
, usb_sndctrlpipe(dev
, 0), 0x29,
3045 USB_DIR_OUT
| USB_TYPE_VENDOR
| USB_RECIP_OTHER
,
3046 1, 2000, NULL
, 0, 1000);
3054 * audio-interface quirks
3056 * returns zero if no standard audio/MIDI parsing is needed.
3057 * returns a postive value if standard audio/midi interfaces are parsed
3059 * returns a negative value at error.
3061 static int snd_usb_create_quirk(struct snd_usb_audio
*chip
,
3062 struct usb_interface
*iface
,
3063 const struct snd_usb_audio_quirk
*quirk
)
3065 typedef int (*quirk_func_t
)(struct snd_usb_audio
*, struct usb_interface
*,
3066 const struct snd_usb_audio_quirk
*);
3067 static const quirk_func_t quirk_funcs
[] = {
3068 [QUIRK_IGNORE_INTERFACE
] = ignore_interface_quirk
,
3069 [QUIRK_COMPOSITE
] = create_composite_quirk
,
3070 [QUIRK_MIDI_STANDARD_INTERFACE
] = snd_usb_create_midi_interface
,
3071 [QUIRK_MIDI_FIXED_ENDPOINT
] = snd_usb_create_midi_interface
,
3072 [QUIRK_MIDI_YAMAHA
] = snd_usb_create_midi_interface
,
3073 [QUIRK_MIDI_MIDIMAN
] = snd_usb_create_midi_interface
,
3074 [QUIRK_MIDI_NOVATION
] = snd_usb_create_midi_interface
,
3075 [QUIRK_MIDI_RAW
] = snd_usb_create_midi_interface
,
3076 [QUIRK_MIDI_EMAGIC
] = snd_usb_create_midi_interface
,
3077 [QUIRK_MIDI_MIDITECH
] = snd_usb_create_midi_interface
,
3078 [QUIRK_AUDIO_STANDARD_INTERFACE
] = create_standard_audio_quirk
,
3079 [QUIRK_AUDIO_FIXED_ENDPOINT
] = create_fixed_stream_quirk
,
3080 [QUIRK_AUDIO_EDIROL_UA700_UA25
] = create_ua700_ua25_quirk
,
3081 [QUIRK_AUDIO_EDIROL_UA1000
] = create_ua1000_quirk
,
3084 if (quirk
->type
< QUIRK_TYPE_COUNT
) {
3085 return quirk_funcs
[quirk
->type
](chip
, iface
, quirk
);
3087 snd_printd(KERN_ERR
"invalid quirk type %d\n", quirk
->type
);
3094 * common proc files to show the usb device info
3096 static void proc_audio_usbbus_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
3098 struct snd_usb_audio
*chip
= entry
->private_data
;
3099 if (! chip
->shutdown
)
3100 snd_iprintf(buffer
, "%03d/%03d\n", chip
->dev
->bus
->busnum
, chip
->dev
->devnum
);
3103 static void proc_audio_usbid_read(struct snd_info_entry
*entry
, struct snd_info_buffer
*buffer
)
3105 struct snd_usb_audio
*chip
= entry
->private_data
;
3106 if (! chip
->shutdown
)
3107 snd_iprintf(buffer
, "%04x:%04x\n",
3108 USB_ID_VENDOR(chip
->usb_id
),
3109 USB_ID_PRODUCT(chip
->usb_id
));
3112 static void snd_usb_audio_create_proc(struct snd_usb_audio
*chip
)
3114 struct snd_info_entry
*entry
;
3115 if (! snd_card_proc_new(chip
->card
, "usbbus", &entry
))
3116 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbbus_read
);
3117 if (! snd_card_proc_new(chip
->card
, "usbid", &entry
))
3118 snd_info_set_text_ops(entry
, chip
, 1024, proc_audio_usbid_read
);
3122 * free the chip instance
3124 * here we have to do not much, since pcm and controls are already freed
3128 static int snd_usb_audio_free(struct snd_usb_audio
*chip
)
3134 static int snd_usb_audio_dev_free(struct snd_device
*device
)
3136 struct snd_usb_audio
*chip
= device
->device_data
;
3137 return snd_usb_audio_free(chip
);
3142 * create a chip instance and set its names.
3144 static int snd_usb_audio_create(struct usb_device
*dev
, int idx
,
3145 const struct snd_usb_audio_quirk
*quirk
,
3146 struct snd_usb_audio
**rchip
)
3148 struct snd_card
*card
;
3149 struct snd_usb_audio
*chip
;
3152 static struct snd_device_ops ops
= {
3153 .dev_free
= snd_usb_audio_dev_free
,
3158 if (snd_usb_get_speed(dev
) != USB_SPEED_FULL
&&
3159 snd_usb_get_speed(dev
) != USB_SPEED_HIGH
) {
3160 snd_printk(KERN_ERR
"unknown device speed %d\n", snd_usb_get_speed(dev
));
3164 card
= snd_card_new(index
[idx
], id
[idx
], THIS_MODULE
, 0);
3166 snd_printk(KERN_ERR
"cannot create card instance %d\n", idx
);
3170 chip
= kzalloc(sizeof(*chip
), GFP_KERNEL
);
3172 snd_card_free(card
);
3179 chip
->usb_id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3180 le16_to_cpu(dev
->descriptor
.idProduct
));
3181 INIT_LIST_HEAD(&chip
->pcm_list
);
3182 INIT_LIST_HEAD(&chip
->midi_list
);
3183 INIT_LIST_HEAD(&chip
->mixer_list
);
3185 if ((err
= snd_device_new(card
, SNDRV_DEV_LOWLEVEL
, chip
, &ops
)) < 0) {
3186 snd_usb_audio_free(chip
);
3187 snd_card_free(card
);
3191 strcpy(card
->driver
, "USB-Audio");
3192 sprintf(component
, "USB%04x:%04x",
3193 USB_ID_VENDOR(chip
->usb_id
), USB_ID_PRODUCT(chip
->usb_id
));
3194 snd_component_add(card
, component
);
3196 /* retrieve the device string as shortname */
3197 if (quirk
&& quirk
->product_name
) {
3198 strlcpy(card
->shortname
, quirk
->product_name
, sizeof(card
->shortname
));
3200 if (!dev
->descriptor
.iProduct
||
3201 usb_string(dev
, dev
->descriptor
.iProduct
,
3202 card
->shortname
, sizeof(card
->shortname
)) <= 0) {
3203 /* no name available from anywhere, so use ID */
3204 sprintf(card
->shortname
, "USB Device %#04x:%#04x",
3205 USB_ID_VENDOR(chip
->usb_id
),
3206 USB_ID_PRODUCT(chip
->usb_id
));
3210 /* retrieve the vendor and device strings as longname */
3211 if (quirk
&& quirk
->vendor_name
) {
3212 len
= strlcpy(card
->longname
, quirk
->vendor_name
, sizeof(card
->longname
));
3214 if (dev
->descriptor
.iManufacturer
)
3215 len
= usb_string(dev
, dev
->descriptor
.iManufacturer
,
3216 card
->longname
, sizeof(card
->longname
));
3219 /* we don't really care if there isn't any vendor string */
3222 strlcat(card
->longname
, " ", sizeof(card
->longname
));
3224 strlcat(card
->longname
, card
->shortname
, sizeof(card
->longname
));
3226 len
= strlcat(card
->longname
, " at ", sizeof(card
->longname
));
3228 if (len
< sizeof(card
->longname
))
3229 usb_make_path(dev
, card
->longname
+ len
, sizeof(card
->longname
) - len
);
3231 strlcat(card
->longname
,
3232 snd_usb_get_speed(dev
) == USB_SPEED_FULL
? ", full speed" : ", high speed",
3233 sizeof(card
->longname
));
3235 snd_usb_audio_create_proc(chip
);
3243 * probe the active usb device
3245 * note that this can be called multiple times per a device, when it
3246 * includes multiple audio control interfaces.
3248 * thus we check the usb device pointer and creates the card instance
3249 * only at the first time. the successive calls of this function will
3250 * append the pcm interface to the corresponding card.
3252 static void *snd_usb_audio_probe(struct usb_device
*dev
,
3253 struct usb_interface
*intf
,
3254 const struct usb_device_id
*usb_id
)
3256 const struct snd_usb_audio_quirk
*quirk
= (const struct snd_usb_audio_quirk
*)usb_id
->driver_info
;
3258 struct snd_usb_audio
*chip
;
3259 struct usb_host_interface
*alts
;
3263 alts
= &intf
->altsetting
[0];
3264 ifnum
= get_iface_desc(alts
)->bInterfaceNumber
;
3265 id
= USB_ID(le16_to_cpu(dev
->descriptor
.idVendor
),
3266 le16_to_cpu(dev
->descriptor
.idProduct
));
3268 if (quirk
&& quirk
->ifnum
>= 0 && ifnum
!= quirk
->ifnum
)
3271 /* SB Extigy needs special boot-up sequence */
3272 /* if more models come, this will go to the quirk list. */
3273 if (id
== USB_ID(0x041e, 0x3000)) {
3274 if (snd_usb_extigy_boot_quirk(dev
, intf
) < 0)
3277 /* SB Audigy 2 NX needs its own boot-up magic, too */
3278 if (id
== USB_ID(0x041e, 0x3020)) {
3279 if (snd_usb_audigy2nx_boot_quirk(dev
) < 0)
3284 * found a config. now register to ALSA
3287 /* check whether it's already registered */
3289 mutex_lock(®ister_mutex
);
3290 for (i
= 0; i
< SNDRV_CARDS
; i
++) {
3291 if (usb_chip
[i
] && usb_chip
[i
]->dev
== dev
) {
3292 if (usb_chip
[i
]->shutdown
) {
3293 snd_printk(KERN_ERR
"USB device is in the shutdown state, cannot create a card instance\n");
3301 /* it's a fresh one.
3302 * now look for an empty slot and create a new card instance
3304 for (i
= 0; i
< SNDRV_CARDS
; i
++)
3305 if (enable
[i
] && ! usb_chip
[i
] &&
3306 (vid
[i
] == -1 || vid
[i
] == USB_ID_VENDOR(id
)) &&
3307 (pid
[i
] == -1 || pid
[i
] == USB_ID_PRODUCT(id
))) {
3308 if (snd_usb_audio_create(dev
, i
, quirk
, &chip
) < 0) {
3311 snd_card_set_dev(chip
->card
, &intf
->dev
);
3315 snd_printk(KERN_ERR
"no available usb audio device\n");
3320 err
= 1; /* continue */
3321 if (quirk
&& quirk
->ifnum
!= QUIRK_NO_INTERFACE
) {
3322 /* need some special handlings */
3323 if ((err
= snd_usb_create_quirk(chip
, intf
, quirk
)) < 0)
3328 /* create normal USB audio interfaces */
3329 if (snd_usb_create_streams(chip
, ifnum
) < 0 ||
3330 snd_usb_create_mixer(chip
, ifnum
) < 0) {
3335 /* we are allowed to call snd_card_register() many times */
3336 if (snd_card_register(chip
->card
) < 0) {
3340 usb_chip
[chip
->index
] = chip
;
3341 chip
->num_interfaces
++;
3342 mutex_unlock(®ister_mutex
);
3346 if (chip
&& !chip
->num_interfaces
)
3347 snd_card_free(chip
->card
);
3348 mutex_unlock(®ister_mutex
);
3354 * we need to take care of counter, since disconnection can be called also
3355 * many times as well as usb_audio_probe().
3357 static void snd_usb_audio_disconnect(struct usb_device
*dev
, void *ptr
)
3359 struct snd_usb_audio
*chip
;
3360 struct snd_card
*card
;
3361 struct list_head
*p
;
3363 if (ptr
== (void *)-1L)
3368 mutex_lock(®ister_mutex
);
3370 chip
->num_interfaces
--;
3371 if (chip
->num_interfaces
<= 0) {
3372 snd_card_disconnect(card
);
3373 /* release the pcm resources */
3374 list_for_each(p
, &chip
->pcm_list
) {
3375 snd_usb_stream_disconnect(p
);
3377 /* release the midi resources */
3378 list_for_each(p
, &chip
->midi_list
) {
3379 snd_usbmidi_disconnect(p
);
3381 /* release mixer resources */
3382 list_for_each(p
, &chip
->mixer_list
) {
3383 snd_usb_mixer_disconnect(p
);
3385 usb_chip
[chip
->index
] = NULL
;
3386 mutex_unlock(®ister_mutex
);
3387 snd_card_free(card
);
3389 mutex_unlock(®ister_mutex
);
3394 * new 2.5 USB kernel API
3396 static int usb_audio_probe(struct usb_interface
*intf
,
3397 const struct usb_device_id
*id
)
3400 chip
= snd_usb_audio_probe(interface_to_usbdev(intf
), intf
, id
);
3402 dev_set_drvdata(&intf
->dev
, chip
);
3408 static void usb_audio_disconnect(struct usb_interface
*intf
)
3410 snd_usb_audio_disconnect(interface_to_usbdev(intf
),
3411 dev_get_drvdata(&intf
->dev
));
3415 static int __init
snd_usb_audio_init(void)
3417 if (nrpacks
< MIN_PACKS_URB
|| nrpacks
> MAX_PACKS
) {
3418 printk(KERN_WARNING
"invalid nrpacks value.\n");
3421 usb_register(&usb_audio_driver
);
3426 static void __exit
snd_usb_audio_cleanup(void)
3428 usb_deregister(&usb_audio_driver
);
3431 module_init(snd_usb_audio_init
);
3432 module_exit(snd_usb_audio_cleanup
);