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/moduleparam.h>
49 #include <sound/core.h>
50 #include <sound/info.h>
51 #include <sound/pcm.h>
52 #include <sound/pcm_params.h>
53 #include <sound/initval.h>
58 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
59 MODULE_DESCRIPTION("USB Audio");
60 MODULE_LICENSE("GPL");
61 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
64 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
65 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
66 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
67 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
68 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
69 static int nrpacks = 4; /* max. number of packets per urb */
70 static int async_unlink = 1;
72 module_param_array(index, int, NULL, 0444);
73 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
74 module_param_array(id, charp, NULL, 0444);
75 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
76 module_param_array(enable, bool, NULL, 0444);
77 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
78 module_param_array(vid, int, NULL, 0444);
79 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
80 module_param_array(pid, int, NULL, 0444);
81 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
82 module_param(nrpacks, int, 0444);
83 MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
84 module_param(async_unlink, bool, 0444);
85 MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
89 * debug the h/w constraints
91 /* #define HW_CONST_DEBUG */
99 #define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
100 #define MAX_URBS 5 /* max. 20ms long packets */
101 #define SYNC_URBS 2 /* always two urbs for sync */
102 #define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
104 typedef struct snd_usb_substream snd_usb_substream_t;
105 typedef struct snd_usb_stream snd_usb_stream_t;
106 typedef struct snd_urb_ctx snd_urb_ctx_t;
109 struct list_head list;
110 snd_pcm_format_t format; /* format type */
111 unsigned int channels; /* # channels */
112 unsigned int fmt_type; /* USB audio format type (1-3) */
113 unsigned int frame_size; /* samples per frame for non-audio */
114 int iface; /* interface number */
115 unsigned char altsetting; /* corresponding alternate setting */
116 unsigned char altset_idx; /* array index of altenate setting */
117 unsigned char attributes; /* corresponding attributes of cs endpoint */
118 unsigned char endpoint; /* endpoint */
119 unsigned char ep_attr; /* endpoint attributes */
120 unsigned int maxpacksize; /* max. packet size */
121 unsigned int rates; /* rate bitmasks */
122 unsigned int rate_min, rate_max; /* min/max rates */
123 unsigned int nr_rates; /* number of rate table entries */
124 unsigned int *rate_table; /* rate table */
129 snd_usb_substream_t *subs;
130 int index; /* index for urb array */
131 int packets; /* number of packets per urb */
132 int transfer; /* transferred size */
133 char *buf; /* buffer for capture */
137 int (*prepare)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
138 int (*retire)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
139 int (*prepare_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
140 int (*retire_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
143 struct snd_usb_substream {
144 snd_usb_stream_t *stream;
145 struct usb_device *dev;
146 snd_pcm_substream_t *pcm_substream;
147 int direction; /* playback or capture */
148 int interface; /* current interface */
149 int endpoint; /* assigned endpoint */
150 struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
151 unsigned int cur_rate; /* current rate (for hw_params callback) */
152 unsigned int period_bytes; /* current period bytes (for hw_params callback) */
153 unsigned int format; /* USB data format */
154 unsigned int datapipe; /* the data i/o pipe */
155 unsigned int syncpipe; /* 1 - async out or adaptive in */
156 unsigned int 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) */
168 unsigned int running: 1; /* running status */
170 unsigned int hwptr; /* free frame position in the buffer (only for playback) */
171 unsigned int hwptr_done; /* processed frame position in the buffer */
172 unsigned int transfer_sched; /* scheduled frames since last period (for playback) */
173 unsigned int transfer_done; /* processed frames since last period update */
174 unsigned long active_mask; /* bitmask of active urbs */
175 unsigned long unlink_mask; /* bitmask of unlinked urbs */
177 unsigned int nurbs; /* # urbs */
178 snd_urb_ctx_t dataurb[MAX_URBS]; /* data urb table */
179 snd_urb_ctx_t syncurb[SYNC_URBS]; /* sync urb table */
180 char syncbuf[SYNC_URBS * 4]; /* sync buffer; it's so small - let's get static */
181 char *tmpbuf; /* temporary buffer for playback */
183 u64 formats; /* format bitmasks (all or'ed) */
184 unsigned int num_formats; /* number of supported audio formats (list) */
185 struct list_head fmt_list; /* format list */
188 struct snd_urb_ops ops; /* callbacks (must be filled at init) */
192 struct snd_usb_stream {
193 snd_usb_audio_t *chip;
196 unsigned int fmt_type; /* USB audio format type (1-3) */
197 snd_usb_substream_t substream[2];
198 struct list_head list;
203 * we keep the snd_usb_audio_t instances by ourselves for merging
204 * the all interfaces on the same card as one sound device.
207 static DECLARE_MUTEX(register_mutex);
208 static snd_usb_audio_t *usb_chip[SNDRV_CARDS];
212 * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
213 * this will overflow at approx 524 kHz
215 inline static unsigned get_usb_full_speed_rate(unsigned int rate)
217 return ((rate << 13) + 62) / 125;
221 * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
222 * this will overflow at approx 4 MHz
224 inline static unsigned get_usb_high_speed_rate(unsigned int rate)
226 return ((rate << 10) + 62) / 125;
229 /* convert our full speed USB rate into sampling rate in Hz */
230 inline static unsigned get_full_speed_hz(unsigned int usb_rate)
232 return (usb_rate * 125 + (1 << 12)) >> 13;
235 /* convert our high speed USB rate into sampling rate in Hz */
236 inline static unsigned get_high_speed_hz(unsigned int usb_rate)
238 return (usb_rate * 125 + (1 << 9)) >> 10;
243 * prepare urb for full speed capture sync pipe
245 * fill the length and offset of each urb descriptor.
246 * the fixed 10.14 frequency is passed through the pipe.
248 static int prepare_capture_sync_urb(snd_usb_substream_t *subs,
249 snd_pcm_runtime_t *runtime,
252 unsigned char *cp = urb->transfer_buffer;
253 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
255 urb->dev = ctx->subs->dev; /* we need to set this at each time */
256 urb->iso_frame_desc[0].length = 3;
257 urb->iso_frame_desc[0].offset = 0;
258 cp[0] = subs->freqn >> 2;
259 cp[1] = subs->freqn >> 10;
260 cp[2] = subs->freqn >> 18;
265 * prepare urb for high speed capture sync pipe
267 * fill the length and offset of each urb descriptor.
268 * the fixed 12.13 frequency is passed as 16.16 through the pipe.
270 static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs,
271 snd_pcm_runtime_t *runtime,
274 unsigned char *cp = urb->transfer_buffer;
275 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
277 urb->dev = ctx->subs->dev; /* we need to set this at each time */
278 urb->iso_frame_desc[0].length = 4;
279 urb->iso_frame_desc[0].offset = 0;
281 cp[1] = subs->freqn >> 8;
282 cp[2] = subs->freqn >> 16;
283 cp[3] = subs->freqn >> 24;
288 * process after capture sync complete
291 static int retire_capture_sync_urb(snd_usb_substream_t *subs,
292 snd_pcm_runtime_t *runtime,
299 * prepare urb for capture data pipe
301 * fill the offset and length of each descriptor.
303 * we use a temporary buffer to write the captured data.
304 * since the length of written data is determined by host, we cannot
305 * write onto the pcm buffer directly... the data is thus copied
306 * later at complete callback to the global buffer.
308 static int prepare_capture_urb(snd_usb_substream_t *subs,
309 snd_pcm_runtime_t *runtime,
314 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
317 urb->dev = ctx->subs->dev; /* we need to set this at each time */
318 urb->number_of_packets = 0;
319 spin_lock_irqsave(&subs->lock, flags);
320 for (i = 0; i < ctx->packets; i++) {
321 urb->iso_frame_desc[i].offset = offs;
322 urb->iso_frame_desc[i].length = subs->curpacksize;
323 offs += subs->curpacksize;
324 urb->number_of_packets++;
325 subs->transfer_sched += subs->curframesize;
326 if (subs->transfer_sched >= runtime->period_size) {
327 subs->transfer_sched -= runtime->period_size;
331 spin_unlock_irqrestore(&subs->lock, flags);
332 urb->transfer_buffer = ctx->buf;
333 urb->transfer_buffer_length = offs;
335 if (! urb->bandwidth) {
337 bustime = usb_check_bandwidth(urb->dev, urb);
340 printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
341 usb_claim_bandwidth(urb->dev, urb, bustime, 1);
348 * process after capture complete
350 * copy the data from each desctiptor to the pcm buffer, and
351 * update the current position.
353 static int retire_capture_urb(snd_usb_substream_t *subs,
354 snd_pcm_runtime_t *runtime,
360 unsigned int stride, len, oldptr;
362 stride = runtime->frame_bits >> 3;
364 for (i = 0; i < urb->number_of_packets; i++) {
365 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
366 if (urb->iso_frame_desc[i].status) {
367 snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
370 len = urb->iso_frame_desc[i].actual_length / stride;
373 /* update the current pointer */
374 spin_lock_irqsave(&subs->lock, flags);
375 oldptr = subs->hwptr_done;
376 subs->hwptr_done += len;
377 if (subs->hwptr_done >= runtime->buffer_size)
378 subs->hwptr_done -= runtime->buffer_size;
379 subs->transfer_done += len;
380 spin_unlock_irqrestore(&subs->lock, flags);
381 /* copy a data chunk */
382 if (oldptr + len > runtime->buffer_size) {
383 unsigned int cnt = runtime->buffer_size - oldptr;
384 unsigned int blen = cnt * stride;
385 memcpy(runtime->dma_area + oldptr * stride, cp, blen);
386 memcpy(runtime->dma_area, cp + blen, len * stride - blen);
388 memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
390 /* update the pointer, call callback if necessary */
391 spin_lock_irqsave(&subs->lock, flags);
392 if (subs->transfer_done >= runtime->period_size) {
393 subs->transfer_done -= runtime->period_size;
394 spin_unlock_irqrestore(&subs->lock, flags);
395 snd_pcm_period_elapsed(subs->pcm_substream);
397 spin_unlock_irqrestore(&subs->lock, flags);
404 * prepare urb for full speed playback sync pipe
406 * set up the offset and length to receive the current frequency.
409 static int prepare_playback_sync_urb(snd_usb_substream_t *subs,
410 snd_pcm_runtime_t *runtime,
413 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
415 urb->dev = ctx->subs->dev; /* we need to set this at each time */
416 urb->iso_frame_desc[0].length = 3;
417 urb->iso_frame_desc[0].offset = 0;
422 * prepare urb for high speed playback sync pipe
424 * set up the offset and length to receive the current frequency.
427 static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs,
428 snd_pcm_runtime_t *runtime,
431 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
433 urb->dev = ctx->subs->dev; /* we need to set this at each time */
434 urb->iso_frame_desc[0].length = 4;
435 urb->iso_frame_desc[0].offset = 0;
440 * process after full speed playback sync complete
442 * retrieve the current 10.14 frequency from pipe, and set it.
443 * the value is referred in prepare_playback_urb().
445 static int retire_playback_sync_urb(snd_usb_substream_t *subs,
446 snd_pcm_runtime_t *runtime,
452 if (urb->iso_frame_desc[0].status == 0 &&
453 urb->iso_frame_desc[0].actual_length == 3) {
454 f = combine_triple((u8*)urb->transfer_buffer) << 2;
455 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
456 spin_lock_irqsave(&subs->lock, flags);
458 spin_unlock_irqrestore(&subs->lock, flags);
466 * process after high speed playback sync complete
468 * retrieve the current 12.13 frequency from pipe, and set it.
469 * the value is referred in prepare_playback_urb().
471 static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs,
472 snd_pcm_runtime_t *runtime,
478 if (urb->iso_frame_desc[0].status == 0 &&
479 urb->iso_frame_desc[0].actual_length == 4) {
480 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
481 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
482 spin_lock_irqsave(&subs->lock, flags);
484 spin_unlock_irqrestore(&subs->lock, flags);
492 * prepare urb for playback data pipe
494 * we copy the data directly from the pcm buffer.
495 * the current position to be copied is held in hwptr field.
496 * since a urb can handle only a single linear buffer, if the total
497 * transferred area overflows the buffer boundary, we cannot send
498 * it directly from the buffer. thus the data is once copied to
499 * a temporary buffer and urb points to that.
501 static int prepare_playback_urb(snd_usb_substream_t *subs,
502 snd_pcm_runtime_t *runtime,
508 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
510 stride = runtime->frame_bits >> 3;
513 urb->dev = ctx->subs->dev; /* we need to set this at each time */
514 urb->number_of_packets = 0;
515 spin_lock_irqsave(&subs->lock, flags);
516 for (i = 0; i < ctx->packets; i++) {
517 /* calculate the size of a packet */
519 counts = subs->maxframesize; /* fixed */
521 subs->phase = (subs->phase & 0xffff) + subs->freqm;
522 counts = subs->phase >> 16;
523 if (counts > subs->maxframesize)
524 counts = subs->maxframesize;
526 /* set up descriptor */
527 urb->iso_frame_desc[i].offset = offs * stride;
528 urb->iso_frame_desc[i].length = counts * stride;
530 urb->number_of_packets++;
531 subs->transfer_sched += counts;
532 if (subs->transfer_sched >= runtime->period_size) {
533 subs->transfer_sched -= runtime->period_size;
534 if (subs->fmt_type == USB_FORMAT_TYPE_II) {
535 if (subs->transfer_sched > 0) {
536 /* FIXME: fill-max mode is not supported yet */
537 offs -= subs->transfer_sched;
538 counts -= subs->transfer_sched;
539 urb->iso_frame_desc[i].length = counts * stride;
540 subs->transfer_sched = 0;
543 if (i < ctx->packets) {
544 /* add a transfer delimiter */
545 urb->iso_frame_desc[i].offset = offs * stride;
546 urb->iso_frame_desc[i].length = 0;
547 urb->number_of_packets++;
553 if (subs->hwptr + offs > runtime->buffer_size) {
554 /* err, the transferred area goes over buffer boundary.
555 * copy the data to the temp buffer.
558 len = runtime->buffer_size - subs->hwptr;
559 urb->transfer_buffer = subs->tmpbuf;
560 memcpy(subs->tmpbuf, runtime->dma_area + subs->hwptr * stride, len * stride);
561 memcpy(subs->tmpbuf + len * stride, runtime->dma_area, (offs - len) * stride);
563 subs->hwptr -= runtime->buffer_size;
565 /* set the buffer pointer */
566 urb->transfer_buffer = runtime->dma_area + subs->hwptr * stride;
569 spin_unlock_irqrestore(&subs->lock, flags);
570 urb->transfer_buffer_length = offs * stride;
571 ctx->transfer = offs;
577 * process after playback data complete
579 * update the current position and call callback if a period is processed.
581 static int retire_playback_urb(snd_usb_substream_t *subs,
582 snd_pcm_runtime_t *runtime,
586 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
588 spin_lock_irqsave(&subs->lock, flags);
589 subs->transfer_done += ctx->transfer;
590 subs->hwptr_done += ctx->transfer;
592 if (subs->hwptr_done >= runtime->buffer_size)
593 subs->hwptr_done -= runtime->buffer_size;
594 if (subs->transfer_done >= runtime->period_size) {
595 subs->transfer_done -= runtime->period_size;
596 spin_unlock_irqrestore(&subs->lock, flags);
597 snd_pcm_period_elapsed(subs->pcm_substream);
599 spin_unlock_irqrestore(&subs->lock, flags);
606 static struct snd_urb_ops audio_urb_ops[2] = {
608 .prepare = prepare_playback_urb,
609 .retire = retire_playback_urb,
610 .prepare_sync = prepare_playback_sync_urb,
611 .retire_sync = retire_playback_sync_urb,
614 .prepare = prepare_capture_urb,
615 .retire = retire_capture_urb,
616 .prepare_sync = prepare_capture_sync_urb,
617 .retire_sync = retire_capture_sync_urb,
621 static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
623 .prepare = prepare_playback_urb,
624 .retire = retire_playback_urb,
625 .prepare_sync = prepare_playback_sync_urb_hs,
626 .retire_sync = retire_playback_sync_urb_hs,
629 .prepare = prepare_capture_urb,
630 .retire = retire_capture_urb,
631 .prepare_sync = prepare_capture_sync_urb_hs,
632 .retire_sync = retire_capture_sync_urb,
637 * complete callback from data urb
639 static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
641 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
642 snd_usb_substream_t *subs = ctx->subs;
643 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
646 if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
647 ! subs->running || /* can be stopped during retire callback */
648 (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
649 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
650 clear_bit(ctx->index, &subs->active_mask);
652 snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
653 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
660 * complete callback from sync urb
662 static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
664 snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
665 snd_usb_substream_t *subs = ctx->subs;
666 snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
669 if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
670 ! subs->running || /* can be stopped during retire callback */
671 (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
672 (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
673 clear_bit(ctx->index + 16, &subs->active_mask);
675 snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
676 snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
683 * unlink active urbs.
685 static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
692 if (!force && subs->stream->chip->shutdown) /* to be sure... */
695 async = !can_sleep && async_unlink;
697 if (! async && in_interrupt())
700 for (i = 0; i < subs->nurbs; i++) {
701 if (test_bit(i, &subs->active_mask)) {
702 if (! test_and_set_bit(i, &subs->unlink_mask)) {
703 struct urb *u = subs->dataurb[i].urb;
705 u->transfer_flags |= URB_ASYNC_UNLINK;
712 if (subs->syncpipe) {
713 for (i = 0; i < SYNC_URBS; i++) {
714 if (test_bit(i+16, &subs->active_mask)) {
715 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
716 struct urb *u = subs->syncurb[i].urb;
718 u->transfer_flags |= URB_ASYNC_UNLINK;
731 * set up and start data/sync urbs
733 static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
738 if (subs->stream->chip->shutdown)
741 for (i = 0; i < subs->nurbs; i++) {
742 snd_assert(subs->dataurb[i].urb, return -EINVAL);
743 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
744 snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
748 if (subs->syncpipe) {
749 for (i = 0; i < SYNC_URBS; i++) {
750 snd_assert(subs->syncurb[i].urb, return -EINVAL);
751 if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
752 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
758 subs->active_mask = 0;
759 subs->unlink_mask = 0;
761 for (i = 0; i < subs->nurbs; i++) {
762 if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
763 snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
766 set_bit(i, &subs->active_mask);
768 if (subs->syncpipe) {
769 for (i = 0; i < SYNC_URBS; i++) {
770 if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
771 snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
774 set_bit(i + 16, &subs->active_mask);
780 // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
781 deactivate_urbs(subs, 0, 0);
787 * wait until all urbs are processed.
789 static int wait_clear_urbs(snd_usb_substream_t *subs)
797 for (i = 0; i < subs->nurbs; i++) {
798 if (test_bit(i, &subs->active_mask))
801 if (subs->syncpipe) {
802 for (i = 0; i < SYNC_URBS; i++) {
803 if (test_bit(i + 16, &subs->active_mask))
809 set_current_state(TASK_UNINTERRUPTIBLE);
811 } while (--timeout > 0);
813 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
819 * return the current pcm pointer. just return the hwptr_done value.
821 static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
823 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
824 return subs->hwptr_done;
829 * start/stop substream
831 static int snd_usb_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
833 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
837 case SNDRV_PCM_TRIGGER_START:
838 err = start_urbs(subs, substream->runtime);
840 case SNDRV_PCM_TRIGGER_STOP:
841 err = deactivate_urbs(subs, 0, 0);
847 return err < 0 ? err : 0;
854 static void release_urb_ctx(snd_urb_ctx_t *u)
857 usb_free_urb(u->urb);
867 * release a substream
869 static void release_substream_urbs(snd_usb_substream_t *subs, int force)
873 /* stop urbs (to be sure) */
874 deactivate_urbs(subs, force, 1);
875 wait_clear_urbs(subs);
877 for (i = 0; i < MAX_URBS; i++)
878 release_urb_ctx(&subs->dataurb[i]);
879 for (i = 0; i < SYNC_URBS; i++)
880 release_urb_ctx(&subs->syncurb[i]);
889 * initialize a substream for plaback/capture
891 static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes,
892 unsigned int rate, unsigned int frame_bits)
894 unsigned int maxsize, n, i;
895 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
896 unsigned int npacks[MAX_URBS], urb_packs, total_packs;
898 /* calculate the frequency in 16.16 format */
899 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
900 subs->freqn = get_usb_full_speed_rate(rate);
902 subs->freqn = get_usb_high_speed_rate(rate);
903 subs->freqm = subs->freqn;
904 subs->freqmax = subs->freqn + (subs->freqn >> 2); /* max. allowed frequency */
907 /* calculate the max. size of packet */
908 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3)) >> 16;
909 if (subs->maxpacksize && maxsize > subs->maxpacksize) {
910 //snd_printd(KERN_DEBUG "maxsize %d is greater than defined size %d\n",
911 // maxsize, subs->maxpacksize);
912 maxsize = subs->maxpacksize;
916 subs->curpacksize = subs->maxpacksize;
918 subs->curpacksize = maxsize;
920 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
923 urb_packs = nrpacks * 8;
925 /* allocate a temporary buffer for playback */
927 subs->tmpbuf = kmalloc(maxsize * urb_packs, GFP_KERNEL);
928 if (! subs->tmpbuf) {
929 snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
934 /* decide how many packets to be used */
935 total_packs = (period_bytes + maxsize - 1) / maxsize;
936 if (total_packs < 2 * MIN_PACKS_URB)
937 total_packs = 2 * MIN_PACKS_URB;
938 subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
939 if (subs->nurbs > MAX_URBS) {
941 subs->nurbs = MAX_URBS;
942 total_packs = MAX_URBS * urb_packs;
945 for (i = 0; i < subs->nurbs; i++) {
946 npacks[i] = n > urb_packs ? urb_packs : n;
949 if (subs->nurbs <= 1) {
950 /* too little - we need at least two packets
951 * to ensure contiguous playback/capture
954 npacks[0] = (total_packs + 1) / 2;
955 npacks[1] = total_packs - npacks[0];
956 } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB) {
957 /* the last packet is too small.. */
958 if (subs->nurbs > 2) {
959 /* merge to the first one */
960 npacks[0] += npacks[subs->nurbs - 1];
965 npacks[0] = (total_packs + 1) / 2;
966 npacks[1] = total_packs - npacks[0];
970 /* allocate and initialize data urbs */
971 for (i = 0; i < subs->nurbs; i++) {
972 snd_urb_ctx_t *u = &subs->dataurb[i];
976 u->packets = npacks[i];
977 if (subs->fmt_type == USB_FORMAT_TYPE_II)
978 u->packets++; /* for transfer delimiter */
980 /* allocate a capture buffer per urb */
981 u->buf = kmalloc(maxsize * u->packets, GFP_KERNEL);
983 release_substream_urbs(subs, 0);
987 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
989 release_substream_urbs(subs, 0);
992 u->urb->dev = subs->dev;
993 u->urb->pipe = subs->datapipe;
994 u->urb->transfer_flags = URB_ISO_ASAP;
995 u->urb->number_of_packets = u->packets;
996 u->urb->interval = 1;
998 u->urb->complete = snd_usb_complete_callback(snd_complete_urb);
1001 if (subs->syncpipe) {
1002 /* allocate and initialize sync urbs */
1003 for (i = 0; i < SYNC_URBS; i++) {
1004 snd_urb_ctx_t *u = &subs->syncurb[i];
1008 u->urb = usb_alloc_urb(1, GFP_KERNEL);
1010 release_substream_urbs(subs, 0);
1013 u->urb->transfer_buffer = subs->syncbuf + i * 4;
1014 u->urb->transfer_buffer_length = 4;
1015 u->urb->dev = subs->dev;
1016 u->urb->pipe = subs->syncpipe;
1017 u->urb->transfer_flags = URB_ISO_ASAP;
1018 u->urb->number_of_packets = 1;
1019 u->urb->interval = 1 << subs->syncinterval;
1020 u->urb->context = u;
1021 u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb);
1029 * find a matching audio format
1031 static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format,
1032 unsigned int rate, unsigned int channels)
1034 struct list_head *p;
1035 struct audioformat *found = NULL;
1036 int cur_attr = 0, attr;
1038 list_for_each(p, &subs->fmt_list) {
1039 struct audioformat *fp;
1040 fp = list_entry(p, struct audioformat, list);
1041 if (fp->format != format || fp->channels != channels)
1043 if (rate < fp->rate_min || rate > fp->rate_max)
1045 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1047 for (i = 0; i < fp->nr_rates; i++)
1048 if (fp->rate_table[i] == rate)
1050 if (i >= fp->nr_rates)
1053 attr = fp->ep_attr & EP_ATTR_MASK;
1059 /* avoid async out and adaptive in if the other method
1060 * supports the same format.
1061 * this is a workaround for the case like
1062 * M-audio audiophile USB.
1064 if (attr != cur_attr) {
1065 if ((attr == EP_ATTR_ASYNC &&
1066 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1067 (attr == EP_ATTR_ADAPTIVE &&
1068 subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1070 if ((cur_attr == EP_ATTR_ASYNC &&
1071 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1072 (cur_attr == EP_ATTR_ADAPTIVE &&
1073 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1079 /* find the format with the largest max. packet size */
1080 if (fp->maxpacksize > found->maxpacksize) {
1090 * initialize the picth control and sample rate
1092 static int init_usb_pitch(struct usb_device *dev, int iface,
1093 struct usb_host_interface *alts,
1094 struct audioformat *fmt)
1097 unsigned char data[1];
1100 ep = get_endpoint(alts, 0)->bEndpointAddress;
1101 /* if endpoint has pitch control, enable it */
1102 if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1104 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1105 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1106 PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1107 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1108 dev->devnum, iface, ep);
1115 static int init_usb_sample_rate(struct usb_device *dev, int iface,
1116 struct usb_host_interface *alts,
1117 struct audioformat *fmt, int rate)
1120 unsigned char data[3];
1123 ep = get_endpoint(alts, 0)->bEndpointAddress;
1124 /* if endpoint has sampling rate control, set it */
1125 if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1128 data[1] = rate >> 8;
1129 data[2] = rate >> 16;
1130 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1131 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1132 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1133 snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1134 dev->devnum, iface, fmt->altsetting, rate, ep);
1137 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1138 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1139 SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1140 snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1141 dev->devnum, iface, fmt->altsetting, ep);
1142 return 0; /* some devices don't support reading */
1144 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1145 if (crate != rate) {
1146 snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1147 // runtime->rate = crate;
1154 * find a matching format and set up the interface
1156 static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
1158 struct usb_device *dev = subs->dev;
1159 struct usb_host_interface *alts;
1160 struct usb_interface_descriptor *altsd;
1161 struct usb_interface *iface;
1162 unsigned int ep, attr;
1163 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1166 iface = usb_ifnum_to_if(dev, fmt->iface);
1167 snd_assert(iface, return -EINVAL);
1168 alts = &iface->altsetting[fmt->altset_idx];
1169 altsd = get_iface_desc(alts);
1170 snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1172 if (fmt == subs->cur_audiofmt)
1175 /* close the old interface */
1176 if (subs->interface >= 0 && subs->interface != fmt->iface) {
1177 usb_set_interface(subs->dev, subs->interface, 0);
1178 subs->interface = -1;
1183 if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1184 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1185 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1186 dev->devnum, fmt->iface, fmt->altsetting);
1189 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1190 subs->interface = fmt->iface;
1191 subs->format = fmt->altset_idx;
1194 /* create a data pipe */
1195 ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1197 subs->datapipe = usb_sndisocpipe(dev, ep);
1199 subs->datapipe = usb_rcvisocpipe(dev, ep);
1200 subs->syncpipe = subs->syncinterval = 0;
1201 subs->maxpacksize = fmt->maxpacksize;
1204 /* we need a sync pipe in async OUT or adaptive IN mode */
1205 /* check the number of EP, since some devices have broken
1206 * descriptors which fool us. if it has only one EP,
1207 * assume it as adaptive-out or sync-in.
1209 attr = fmt->ep_attr & EP_ATTR_MASK;
1210 if (((is_playback && attr == EP_ATTR_ASYNC) ||
1211 (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1212 altsd->bNumEndpoints >= 2) {
1213 /* check sync-pipe endpoint */
1214 /* ... and check descriptor size before accessing bSynchAddress
1215 because there is a version of the SB Audigy 2 NX firmware lacking
1216 the audio fields in the endpoint descriptors */
1217 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1218 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1219 get_endpoint(alts, 1)->bSynchAddress != 0)) {
1220 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1221 dev->devnum, fmt->iface, fmt->altsetting);
1224 ep = get_endpoint(alts, 1)->bEndpointAddress;
1225 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1226 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1227 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1228 snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1229 dev->devnum, fmt->iface, fmt->altsetting);
1232 ep &= USB_ENDPOINT_NUMBER_MASK;
1234 subs->syncpipe = usb_rcvisocpipe(dev, ep);
1236 subs->syncpipe = usb_sndisocpipe(dev, ep);
1237 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1238 get_endpoint(alts, 1)->bRefresh >= 1 &&
1239 get_endpoint(alts, 1)->bRefresh <= 9)
1240 subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
1242 subs->syncinterval = 1;
1245 /* always fill max packet size */
1246 if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1249 if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1252 subs->cur_audiofmt = fmt;
1255 printk("setting done: format = %d, rate = %d, channels = %d\n",
1256 fmt->format, fmt->rate, fmt->channels);
1257 printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
1258 subs->datapipe, subs->syncpipe);
1265 * hw_params callback
1267 * allocate a buffer and set the given audio format.
1269 * so far we use a physically linear buffer although packetize transfer
1270 * doesn't need a continuous area.
1271 * if sg buffer is supported on the later version of alsa, we'll follow
1274 static int snd_usb_hw_params(snd_pcm_substream_t *substream,
1275 snd_pcm_hw_params_t *hw_params)
1277 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1278 struct audioformat *fmt;
1279 unsigned int channels, rate, format;
1282 ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
1286 format = params_format(hw_params);
1287 rate = params_rate(hw_params);
1288 channels = params_channels(hw_params);
1289 fmt = find_format(subs, format, rate, channels);
1291 snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
1292 snd_pcm_format_name(format), rate, channels);
1296 changed = subs->cur_audiofmt != fmt ||
1297 subs->period_bytes != params_period_bytes(hw_params) ||
1298 subs->cur_rate != rate;
1299 if ((ret = set_format(subs, fmt)) < 0)
1302 if (subs->cur_rate != rate) {
1303 struct usb_host_interface *alts;
1304 struct usb_interface *iface;
1305 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1306 alts = &iface->altsetting[fmt->altset_idx];
1307 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1310 subs->cur_rate = rate;
1314 /* format changed */
1315 release_substream_urbs(subs, 0);
1316 /* influenced: period_bytes, channels, rate, format, */
1317 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1318 params_rate(hw_params),
1319 snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1328 * reset the audio format and release the buffer
1330 static int snd_usb_hw_free(snd_pcm_substream_t *substream)
1332 snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
1334 subs->cur_audiofmt = NULL;
1336 subs->period_bytes = 0;
1337 release_substream_urbs(subs, 0);
1338 return snd_pcm_lib_free_pages(substream);
1344 * only a few subtle things...
1346 static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
1348 snd_pcm_runtime_t *runtime = substream->runtime;
1349 snd_usb_substream_t *subs = (snd_usb_substream_t *)runtime->private_data;
1351 if (! subs->cur_audiofmt) {
1352 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1356 /* some unit conversions in runtime */
1357 subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1358 subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1360 /* reset the pointer */
1362 subs->hwptr_done = 0;
1363 subs->transfer_sched = 0;
1364 subs->transfer_done = 0;
1367 /* clear urbs (to be sure) */
1368 deactivate_urbs(subs, 0, 1);
1369 wait_clear_urbs(subs);
1374 static snd_pcm_hardware_t snd_usb_playback =
1376 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1377 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1378 SNDRV_PCM_INFO_MMAP_VALID),
1379 .buffer_bytes_max = (128*1024),
1380 .period_bytes_min = 64,
1381 .period_bytes_max = (128*1024),
1383 .periods_max = 1024,
1386 static snd_pcm_hardware_t snd_usb_capture =
1388 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1389 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1390 SNDRV_PCM_INFO_MMAP_VALID),
1391 .buffer_bytes_max = (128*1024),
1392 .period_bytes_min = 64,
1393 .period_bytes_max = (128*1024),
1395 .periods_max = 1024,
1402 #ifdef HW_CONST_DEBUG
1403 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1405 #define hwc_debug(fmt, args...) /**/
1408 static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp)
1410 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1411 snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1412 snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1414 /* check the format */
1415 if (! snd_mask_test(fmts, fp->format)) {
1416 hwc_debug(" > check: no supported format %d\n", fp->format);
1419 /* check the channels */
1420 if (fp->channels < ct->min || fp->channels > ct->max) {
1421 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1424 /* check the rate is within the range */
1425 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1426 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1429 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1430 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1436 static int hw_rule_rate(snd_pcm_hw_params_t *params,
1437 snd_pcm_hw_rule_t *rule)
1439 snd_usb_substream_t *subs = rule->private;
1440 struct list_head *p;
1441 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1442 unsigned int rmin, rmax;
1445 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1448 list_for_each(p, &subs->fmt_list) {
1449 struct audioformat *fp;
1450 fp = list_entry(p, struct audioformat, list);
1451 if (! hw_check_valid_format(params, fp))
1454 if (rmin > fp->rate_min)
1455 rmin = fp->rate_min;
1456 if (rmax < fp->rate_max)
1457 rmax = fp->rate_max;
1459 rmin = fp->rate_min;
1460 rmax = fp->rate_max;
1465 hwc_debug(" --> get empty\n");
1471 if (it->min < rmin) {
1476 if (it->max > rmax) {
1481 if (snd_interval_checkempty(it)) {
1485 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1490 static int hw_rule_channels(snd_pcm_hw_params_t *params,
1491 snd_pcm_hw_rule_t *rule)
1493 snd_usb_substream_t *subs = rule->private;
1494 struct list_head *p;
1495 snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1496 unsigned int rmin, rmax;
1499 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1502 list_for_each(p, &subs->fmt_list) {
1503 struct audioformat *fp;
1504 fp = list_entry(p, struct audioformat, list);
1505 if (! hw_check_valid_format(params, fp))
1508 if (rmin > fp->channels)
1509 rmin = fp->channels;
1510 if (rmax < fp->channels)
1511 rmax = fp->channels;
1513 rmin = fp->channels;
1514 rmax = fp->channels;
1519 hwc_debug(" --> get empty\n");
1525 if (it->min < rmin) {
1530 if (it->max > rmax) {
1535 if (snd_interval_checkempty(it)) {
1539 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1543 static int hw_rule_format(snd_pcm_hw_params_t *params,
1544 snd_pcm_hw_rule_t *rule)
1546 snd_usb_substream_t *subs = rule->private;
1547 struct list_head *p;
1548 snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1553 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1555 list_for_each(p, &subs->fmt_list) {
1556 struct audioformat *fp;
1557 fp = list_entry(p, struct audioformat, list);
1558 if (! hw_check_valid_format(params, fp))
1560 fbits |= (1ULL << fp->format);
1563 oldbits[0] = fmt->bits[0];
1564 oldbits[1] = fmt->bits[1];
1565 fmt->bits[0] &= (u32)fbits;
1566 fmt->bits[1] &= (u32)(fbits >> 32);
1567 if (! fmt->bits[0] && ! fmt->bits[1]) {
1568 hwc_debug(" --> get empty\n");
1571 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1572 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1579 * check whether the registered audio formats need special hw-constraints
1581 static int check_hw_params_convention(snd_usb_substream_t *subs)
1586 u32 cmaster, rmaster;
1587 u32 rate_min = 0, rate_max = 0;
1588 struct list_head *p;
1591 channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1592 rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1594 list_for_each(p, &subs->fmt_list) {
1595 struct audioformat *f;
1596 f = list_entry(p, struct audioformat, list);
1597 /* unconventional channels? */
1598 if (f->channels > 32)
1600 /* continuous rate min/max matches? */
1601 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1602 if (rate_min && f->rate_min != rate_min)
1604 if (rate_max && f->rate_max != rate_max)
1606 rate_min = f->rate_min;
1607 rate_max = f->rate_max;
1609 /* combination of continuous rates and fixed rates? */
1610 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1611 if (f->rates != rates[f->format])
1614 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1615 if (rates[f->format] && rates[f->format] != f->rates)
1618 channels[f->format] |= (1 << f->channels);
1619 rates[f->format] |= f->rates;
1621 /* check whether channels and rates match for all formats */
1622 cmaster = rmaster = 0;
1623 for (i = 0; i < MAX_MASK; i++) {
1624 if (cmaster != channels[i] && cmaster && channels[i])
1626 if (rmaster != rates[i] && rmaster && rates[i])
1629 cmaster = channels[i];
1633 /* check whether channels match for all distinct rates */
1634 memset(channels, 0, MAX_MASK * sizeof(u32));
1635 list_for_each(p, &subs->fmt_list) {
1636 struct audioformat *f;
1637 f = list_entry(p, struct audioformat, list);
1638 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1640 for (i = 0; i < 32; i++) {
1641 if (f->rates & (1 << i))
1642 channels[i] |= (1 << f->channels);
1646 for (i = 0; i < 32; i++) {
1647 if (cmaster != channels[i] && cmaster && channels[i])
1650 cmaster = channels[i];
1662 * set up the runtime hardware information.
1665 static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
1667 struct list_head *p;
1670 runtime->hw.formats = subs->formats;
1672 runtime->hw.rate_min = 0x7fffffff;
1673 runtime->hw.rate_max = 0;
1674 runtime->hw.channels_min = 256;
1675 runtime->hw.channels_max = 0;
1676 runtime->hw.rates = 0;
1677 /* check min/max rates and channels */
1678 list_for_each(p, &subs->fmt_list) {
1679 struct audioformat *fp;
1680 fp = list_entry(p, struct audioformat, list);
1681 runtime->hw.rates |= fp->rates;
1682 if (runtime->hw.rate_min > fp->rate_min)
1683 runtime->hw.rate_min = fp->rate_min;
1684 if (runtime->hw.rate_max < fp->rate_max)
1685 runtime->hw.rate_max = fp->rate_max;
1686 if (runtime->hw.channels_min > fp->channels)
1687 runtime->hw.channels_min = fp->channels;
1688 if (runtime->hw.channels_max < fp->channels)
1689 runtime->hw.channels_max = fp->channels;
1690 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1691 /* FIXME: there might be more than one audio formats... */
1692 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1697 /* set the period time minimum 1ms */
1698 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1699 1000 * MIN_PACKS_URB,
1700 /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1702 if (check_hw_params_convention(subs)) {
1703 hwc_debug("setting extra hw constraints...\n");
1704 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1706 SNDRV_PCM_HW_PARAM_FORMAT,
1707 SNDRV_PCM_HW_PARAM_CHANNELS,
1710 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1711 hw_rule_channels, subs,
1712 SNDRV_PCM_HW_PARAM_FORMAT,
1713 SNDRV_PCM_HW_PARAM_RATE,
1716 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1717 hw_rule_format, subs,
1718 SNDRV_PCM_HW_PARAM_RATE,
1719 SNDRV_PCM_HW_PARAM_CHANNELS,
1726 static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
1727 snd_pcm_hardware_t *hw)
1729 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1730 snd_pcm_runtime_t *runtime = substream->runtime;
1731 snd_usb_substream_t *subs = &as->substream[direction];
1733 subs->interface = -1;
1736 runtime->private_data = subs;
1737 subs->pcm_substream = substream;
1738 return setup_hw_info(runtime, subs);
1741 static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
1743 snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
1744 snd_usb_substream_t *subs = &as->substream[direction];
1746 if (subs->interface >= 0) {
1747 usb_set_interface(subs->dev, subs->interface, 0);
1748 subs->interface = -1;
1750 subs->pcm_substream = NULL;
1754 static int snd_usb_playback_open(snd_pcm_substream_t *substream)
1756 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
1759 static int snd_usb_playback_close(snd_pcm_substream_t *substream)
1761 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1764 static int snd_usb_capture_open(snd_pcm_substream_t *substream)
1766 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
1769 static int snd_usb_capture_close(snd_pcm_substream_t *substream)
1771 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1774 static snd_pcm_ops_t snd_usb_playback_ops = {
1775 .open = snd_usb_playback_open,
1776 .close = snd_usb_playback_close,
1777 .ioctl = snd_pcm_lib_ioctl,
1778 .hw_params = snd_usb_hw_params,
1779 .hw_free = snd_usb_hw_free,
1780 .prepare = snd_usb_pcm_prepare,
1781 .trigger = snd_usb_pcm_trigger,
1782 .pointer = snd_usb_pcm_pointer,
1785 static snd_pcm_ops_t snd_usb_capture_ops = {
1786 .open = snd_usb_capture_open,
1787 .close = snd_usb_capture_close,
1788 .ioctl = snd_pcm_lib_ioctl,
1789 .hw_params = snd_usb_hw_params,
1790 .hw_free = snd_usb_hw_free,
1791 .prepare = snd_usb_pcm_prepare,
1792 .trigger = snd_usb_pcm_trigger,
1793 .pointer = snd_usb_pcm_pointer,
1803 * combine bytes and get an integer value
1805 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
1808 case 1: return *bytes;
1809 case 2: return combine_word(bytes);
1810 case 3: return combine_triple(bytes);
1811 case 4: return combine_quad(bytes);
1817 * parse descriptor buffer and return the pointer starting the given
1820 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
1832 if (p[1] == dtype && (!after || (void *)p > after)) {
1841 * find a class-specified interface descriptor with the given subtype.
1843 void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
1845 unsigned char *p = after;
1847 while ((p = snd_usb_find_desc(buffer, buflen, p,
1848 USB_DT_CS_INTERFACE)) != NULL) {
1849 if (p[0] >= 3 && p[2] == dsubtype)
1856 * Wrapper for usb_control_msg().
1857 * Allocates a temp buffer to prevent dmaing from/to the stack.
1859 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
1860 __u8 requesttype, __u16 value, __u16 index, void *data,
1861 __u16 size, int timeout)
1867 buf = kmalloc(size, GFP_KERNEL);
1870 memcpy(buf, data, size);
1872 err = usb_control_msg(dev, pipe, request, requesttype,
1873 value, index, buf, size, timeout);
1875 memcpy(data, buf, size);
1883 * entry point for linux usb interface
1886 static int usb_audio_probe(struct usb_interface *intf,
1887 const struct usb_device_id *id);
1888 static void usb_audio_disconnect(struct usb_interface *intf);
1890 static struct usb_device_id usb_audio_ids [] = {
1891 #include "usbquirks.h"
1892 { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
1893 .bInterfaceClass = USB_CLASS_AUDIO,
1894 .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
1895 { } /* Terminating entry */
1898 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
1900 static struct usb_driver usb_audio_driver = {
1901 .owner = THIS_MODULE,
1902 .name = "snd-usb-audio",
1903 .probe = usb_audio_probe,
1904 .disconnect = usb_audio_disconnect,
1905 .id_table = usb_audio_ids,
1910 * proc interface for list the supported pcm formats
1912 static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
1914 struct list_head *p;
1915 static char *sync_types[4] = {
1916 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
1919 list_for_each(p, &subs->fmt_list) {
1920 struct audioformat *fp;
1921 fp = list_entry(p, struct audioformat, list);
1922 snd_iprintf(buffer, " Interface %d\n", fp->iface);
1923 snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
1924 snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
1925 snd_iprintf(buffer, " Channels: %d\n", fp->channels);
1926 snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
1927 fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
1928 fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
1929 sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
1930 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1931 snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
1932 fp->rate_min, fp->rate_max);
1935 snd_iprintf(buffer, " Rates: ");
1936 for (i = 0; i < fp->nr_rates; i++) {
1938 snd_iprintf(buffer, ", ");
1939 snd_iprintf(buffer, "%d", fp->rate_table[i]);
1941 snd_iprintf(buffer, "\n");
1943 // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
1944 // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
1948 static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
1950 if (subs->running) {
1952 snd_iprintf(buffer, " Status: Running\n");
1953 snd_iprintf(buffer, " Interface = %d\n", subs->interface);
1954 snd_iprintf(buffer, " Altset = %d\n", subs->format);
1955 snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
1956 for (i = 0; i < subs->nurbs; i++)
1957 snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
1958 snd_iprintf(buffer, "]\n");
1959 snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
1960 snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
1961 snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
1962 ? get_full_speed_hz(subs->freqm)
1963 : get_high_speed_hz(subs->freqm),
1964 subs->freqm >> 16, subs->freqm & 0xffff);
1966 snd_iprintf(buffer, " Status: Stop\n");
1970 static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
1972 snd_usb_stream_t *stream = entry->private_data;
1974 snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
1976 if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
1977 snd_iprintf(buffer, "\nPlayback:\n");
1978 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
1979 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
1981 if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
1982 snd_iprintf(buffer, "\nCapture:\n");
1983 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
1984 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
1988 static void proc_pcm_format_add(snd_usb_stream_t *stream)
1990 snd_info_entry_t *entry;
1992 snd_card_t *card = stream->chip->card;
1994 sprintf(name, "stream%d", stream->pcm_index);
1995 if (! snd_card_proc_new(card, name, &entry))
1996 snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
2001 * initialize the substream instance.
2004 static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp)
2006 snd_usb_substream_t *subs = &as->substream[stream];
2008 INIT_LIST_HEAD(&subs->fmt_list);
2009 spin_lock_init(&subs->lock);
2012 subs->direction = stream;
2013 subs->dev = as->chip->dev;
2014 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
2015 subs->ops = audio_urb_ops[stream];
2017 subs->ops = audio_urb_ops_high_speed[stream];
2018 snd_pcm_lib_preallocate_pages(as->pcm->streams[stream].substream,
2019 SNDRV_DMA_TYPE_CONTINUOUS,
2020 snd_dma_continuous_data(GFP_KERNEL),
2021 64 * 1024, 128 * 1024);
2022 snd_pcm_set_ops(as->pcm, stream,
2023 stream == SNDRV_PCM_STREAM_PLAYBACK ?
2024 &snd_usb_playback_ops : &snd_usb_capture_ops);
2026 list_add_tail(&fp->list, &subs->fmt_list);
2027 subs->formats |= 1ULL << fp->format;
2028 subs->endpoint = fp->endpoint;
2029 subs->num_formats++;
2030 subs->fmt_type = fp->fmt_type;
2037 static void free_substream(snd_usb_substream_t *subs)
2039 struct list_head *p, *n;
2041 if (! subs->num_formats)
2042 return; /* not initialized */
2043 list_for_each_safe(p, n, &subs->fmt_list) {
2044 struct audioformat *fp = list_entry(p, struct audioformat, list);
2045 kfree(fp->rate_table);
2052 * free a usb stream instance
2054 static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
2056 free_substream(&stream->substream[0]);
2057 free_substream(&stream->substream[1]);
2058 list_del(&stream->list);
2062 static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
2064 snd_usb_stream_t *stream = pcm->private_data;
2067 snd_pcm_lib_preallocate_free_for_all(pcm);
2068 snd_usb_audio_stream_free(stream);
2074 * add this endpoint to the chip instance.
2075 * if a stream with the same endpoint already exists, append to it.
2076 * if not, create a new pcm stream.
2078 static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp)
2080 struct list_head *p;
2081 snd_usb_stream_t *as;
2082 snd_usb_substream_t *subs;
2086 list_for_each(p, &chip->pcm_list) {
2087 as = list_entry(p, snd_usb_stream_t, list);
2088 if (as->fmt_type != fp->fmt_type)
2090 subs = &as->substream[stream];
2091 if (! subs->endpoint)
2093 if (subs->endpoint == fp->endpoint) {
2094 list_add_tail(&fp->list, &subs->fmt_list);
2095 subs->num_formats++;
2096 subs->formats |= 1ULL << fp->format;
2100 /* look for an empty stream */
2101 list_for_each(p, &chip->pcm_list) {
2102 as = list_entry(p, snd_usb_stream_t, list);
2103 if (as->fmt_type != fp->fmt_type)
2105 subs = &as->substream[stream];
2108 err = snd_pcm_new_stream(as->pcm, stream, 1);
2111 init_substream(as, stream, fp);
2115 /* create a new pcm */
2116 as = kmalloc(sizeof(*as), GFP_KERNEL);
2119 memset(as, 0, sizeof(*as));
2120 as->pcm_index = chip->pcm_devs;
2122 as->fmt_type = fp->fmt_type;
2123 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2124 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2125 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2132 pcm->private_data = as;
2133 pcm->private_free = snd_usb_audio_pcm_free;
2134 pcm->info_flags = 0;
2135 if (chip->pcm_devs > 0)
2136 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2138 strcpy(pcm->name, "USB Audio");
2140 init_substream(as, stream, fp);
2142 list_add(&as->list, &chip->pcm_list);
2145 proc_pcm_format_add(as);
2152 * check if the device uses big-endian samples
2154 static int is_big_endian_format(snd_usb_audio_t *chip, struct audioformat *fp)
2156 switch (chip->usb_id) {
2157 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2158 if (fp->endpoint & USB_DIR_IN)
2161 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2168 * parse the audio format type I descriptor
2169 * and returns the corresponding pcm format
2172 * @fp: audioformat record
2173 * @format: the format tag (wFormatTag)
2174 * @fmt: the format type descriptor
2176 static int parse_audio_format_i_type(snd_usb_audio_t *chip, struct audioformat *fp,
2177 int format, unsigned char *fmt)
2180 int sample_width, sample_bytes;
2182 /* FIXME: correct endianess and sign? */
2184 sample_width = fmt[6];
2185 sample_bytes = fmt[5];
2187 case 0: /* some devices don't define this correctly... */
2188 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
2189 chip->dev->devnum, fp->iface, fp->altsetting);
2191 case USB_AUDIO_FORMAT_PCM:
2192 if (sample_width > sample_bytes * 8) {
2193 snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2194 chip->dev->devnum, fp->iface, fp->altsetting,
2195 sample_width, sample_bytes);
2197 /* check the format byte size */
2200 pcm_format = SNDRV_PCM_FORMAT_S8;
2203 if (is_big_endian_format(chip, fp))
2204 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2206 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2209 if (is_big_endian_format(chip, fp))
2210 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2212 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2215 pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2218 snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2219 chip->dev->devnum, fp->iface,
2220 fp->altsetting, sample_width, sample_bytes);
2224 case USB_AUDIO_FORMAT_PCM8:
2225 /* Dallas DS4201 workaround */
2226 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
2227 pcm_format = SNDRV_PCM_FORMAT_S8;
2229 pcm_format = SNDRV_PCM_FORMAT_U8;
2231 case USB_AUDIO_FORMAT_IEEE_FLOAT:
2232 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2234 case USB_AUDIO_FORMAT_ALAW:
2235 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2237 case USB_AUDIO_FORMAT_MU_LAW:
2238 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2241 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
2242 chip->dev->devnum, fp->iface, fp->altsetting, format);
2250 * parse the format descriptor and stores the possible sample rates
2251 * on the audioformat table.
2254 * @fp: audioformat record
2255 * @fmt: the format descriptor
2256 * @offset: the start offset of descriptor pointing the rate type
2257 * (7 for type I and II, 8 for type II)
2259 static int parse_audio_format_rates(snd_usb_audio_t *chip, struct audioformat *fp,
2260 unsigned char *fmt, int offset)
2262 int nr_rates = fmt[offset];
2263 if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2264 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2265 chip->dev->devnum, fp->iface, fp->altsetting);
2271 * build the rate table and bitmap flags
2274 /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
2275 static unsigned int conv_rates[] = {
2276 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
2277 64000, 88200, 96000, 176400, 192000
2279 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2280 if (fp->rate_table == NULL) {
2281 snd_printk(KERN_ERR "cannot malloc\n");
2285 fp->nr_rates = nr_rates;
2286 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2287 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2288 unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
2289 if (rate < fp->rate_min)
2290 fp->rate_min = rate;
2291 else if (rate > fp->rate_max)
2292 fp->rate_max = rate;
2293 for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
2294 if (rate == conv_rates[c]) {
2295 fp->rates |= (1 << c);
2301 /* continuous rates */
2302 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2303 fp->rate_min = combine_triple(&fmt[offset + 1]);
2304 fp->rate_max = combine_triple(&fmt[offset + 4]);
2310 * parse the format type I and III descriptors
2312 static int parse_audio_format_i(snd_usb_audio_t *chip, struct audioformat *fp,
2313 int format, unsigned char *fmt)
2317 if (fmt[3] == USB_FORMAT_TYPE_III) {
2318 /* FIXME: the format type is really IECxxx
2319 * but we give normal PCM format to get the existing
2322 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2324 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
2328 fp->format = pcm_format;
2329 fp->channels = fmt[4];
2330 if (fp->channels < 1) {
2331 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
2332 chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
2335 return parse_audio_format_rates(chip, fp, fmt, 7);
2339 * prase the format type II descriptor
2341 static int parse_audio_format_ii(snd_usb_audio_t *chip, struct audioformat *fp,
2342 int format, unsigned char *fmt)
2344 int brate, framesize;
2346 case USB_AUDIO_FORMAT_AC3:
2347 /* FIXME: there is no AC3 format defined yet */
2348 // fp->format = SNDRV_PCM_FORMAT_AC3;
2349 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2351 case USB_AUDIO_FORMAT_MPEG:
2352 fp->format = SNDRV_PCM_FORMAT_MPEG;
2355 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
2356 chip->dev->devnum, fp->iface, fp->altsetting, format);
2357 fp->format = SNDRV_PCM_FORMAT_MPEG;
2361 brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
2362 framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2363 snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2364 fp->frame_size = framesize;
2365 return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
2368 static int parse_audio_format(snd_usb_audio_t *chip, struct audioformat *fp,
2369 int format, unsigned char *fmt, int stream)
2374 case USB_FORMAT_TYPE_I:
2375 case USB_FORMAT_TYPE_III:
2376 err = parse_audio_format_i(chip, fp, format, fmt);
2378 case USB_FORMAT_TYPE_II:
2379 err = parse_audio_format_ii(chip, fp, format, fmt);
2382 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
2383 chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
2386 fp->fmt_type = fmt[3];
2390 /* FIXME: temporary hack for extigy/audigy 2 nx */
2391 /* extigy apparently supports sample rates other than 48k
2392 * but not in ordinary way. so we enable only 48k atm.
2394 if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2395 chip->usb_id == USB_ID(0x041e, 0x3020)) {
2396 if (fmt[3] == USB_FORMAT_TYPE_I &&
2397 stream == SNDRV_PCM_STREAM_PLAYBACK &&
2398 fp->rates != SNDRV_PCM_RATE_48000 &&
2399 fp->rates != SNDRV_PCM_RATE_96000)
2400 return -1; /* use 48k only */
2406 static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
2408 struct usb_device *dev;
2409 struct usb_interface *iface;
2410 struct usb_host_interface *alts;
2411 struct usb_interface_descriptor *altsd;
2412 int i, altno, err, stream;
2414 struct audioformat *fp;
2415 unsigned char *fmt, *csep;
2419 /* parse the interface's altsettings */
2420 iface = usb_ifnum_to_if(dev, iface_no);
2421 for (i = 0; i < iface->num_altsetting; i++) {
2422 alts = &iface->altsetting[i];
2423 altsd = get_iface_desc(alts);
2424 /* skip invalid one */
2425 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2426 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2427 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2428 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2429 altsd->bNumEndpoints < 1 ||
2430 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2432 /* must be isochronous */
2433 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2434 USB_ENDPOINT_XFER_ISOC)
2436 /* check direction */
2437 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2438 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2439 altno = altsd->bAlternateSetting;
2441 /* get audio formats */
2442 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2444 snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2445 dev->devnum, iface_no, altno);
2450 snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2451 dev->devnum, iface_no, altno);
2455 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2457 /* get format type */
2458 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2460 snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2461 dev->devnum, iface_no, altno);
2465 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2466 dev->devnum, iface_no, altno);
2470 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2471 /* Creamware Noah has this descriptor after the 2nd endpoint */
2472 if (!csep && altsd->bNumEndpoints >= 2)
2473 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2474 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2475 snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
2476 dev->devnum, iface_no, altno);
2480 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2482 snd_printk(KERN_ERR "cannot malloc\n");
2486 memset(fp, 0, sizeof(*fp));
2487 fp->iface = iface_no;
2488 fp->altsetting = altno;
2490 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2491 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2492 /* FIXME: decode wMaxPacketSize of high bandwith endpoints */
2493 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2494 fp->attributes = csep[3];
2496 /* some quirks for attributes here */
2498 switch (chip->usb_id) {
2499 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2500 /* Optoplay sets the sample rate attribute although
2501 * it seems not supporting it in fact.
2503 fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
2505 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2506 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2507 /* doesn't set the sample rate attribute, but supports it */
2508 fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
2510 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2511 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2512 an older model 77d:223) */
2514 * plantronics headset and Griffin iMic have set adaptive-in
2515 * although it's really not...
2517 fp->ep_attr &= ~EP_ATTR_MASK;
2518 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2519 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2521 fp->ep_attr |= EP_ATTR_SYNC;
2525 /* ok, let's parse further... */
2526 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
2527 kfree(fp->rate_table);
2532 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
2533 err = add_audio_endpoint(chip, stream, fp);
2535 kfree(fp->rate_table);
2539 /* try to set the interface... */
2540 usb_set_interface(chip->dev, iface_no, altno);
2541 init_usb_pitch(chip->dev, iface_no, alts, fp);
2542 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2549 * disconnect streams
2550 * called from snd_usb_audio_disconnect()
2552 static void snd_usb_stream_disconnect(struct list_head *head)
2555 snd_usb_stream_t *as;
2556 snd_usb_substream_t *subs;
2558 as = list_entry(head, snd_usb_stream_t, list);
2559 for (idx = 0; idx < 2; idx++) {
2560 subs = &as->substream[idx];
2561 if (!subs->num_formats)
2563 release_substream_urbs(subs, 1);
2564 subs->interface = -1;
2569 * parse audio control descriptor and create pcm/midi streams
2571 static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
2573 struct usb_device *dev = chip->dev;
2574 struct usb_host_interface *host_iface;
2575 struct usb_interface *iface;
2579 /* find audiocontrol interface */
2580 host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2581 if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2582 snd_printk(KERN_ERR "cannot find HEADER\n");
2585 if (! p1[7] || p1[0] < 8 + p1[7]) {
2586 snd_printk(KERN_ERR "invalid HEADER\n");
2591 * parse all USB audio streaming interfaces
2593 for (i = 0; i < p1[7]; i++) {
2594 struct usb_host_interface *alts;
2595 struct usb_interface_descriptor *altsd;
2597 iface = usb_ifnum_to_if(dev, j);
2599 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2600 dev->devnum, ctrlif, j);
2603 if (usb_interface_claimed(iface)) {
2604 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2607 alts = &iface->altsetting[0];
2608 altsd = get_iface_desc(alts);
2609 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2610 altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2611 altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2612 if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2613 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2616 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2619 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2620 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2621 altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2622 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2623 /* skip non-supported classes */
2626 if (! parse_audio_endpoints(chip, j)) {
2627 usb_set_interface(dev, j, 0); /* reset the current interface */
2628 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2636 * create a stream for an endpoint/altsetting without proper descriptors
2638 static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
2639 struct usb_interface *iface,
2640 const snd_usb_audio_quirk_t *quirk)
2642 struct audioformat *fp;
2643 struct usb_host_interface *alts;
2645 int *rate_table = NULL;
2647 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2649 snd_printk(KERN_ERR "cannot malloc\n");
2652 memcpy(fp, quirk->data, sizeof(*fp));
2653 if (fp->nr_rates > 0) {
2654 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2659 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2660 fp->rate_table = rate_table;
2663 stream = (fp->endpoint & USB_DIR_IN)
2664 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2665 err = add_audio_endpoint(chip, stream, fp);
2671 if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2672 fp->altset_idx >= iface->num_altsetting) {
2677 alts = &iface->altsetting[fp->altset_idx];
2678 usb_set_interface(chip->dev, fp->iface, 0);
2679 init_usb_pitch(chip->dev, fp->iface, alts, fp);
2680 init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2685 * create a stream for an interface with proper descriptors
2687 static int create_standard_interface_quirk(snd_usb_audio_t *chip,
2688 struct usb_interface *iface,
2689 const snd_usb_audio_quirk_t *quirk)
2691 struct usb_host_interface *alts;
2692 struct usb_interface_descriptor *altsd;
2695 alts = &iface->altsetting[0];
2696 altsd = get_iface_desc(alts);
2697 switch (quirk->type) {
2698 case QUIRK_AUDIO_STANDARD_INTERFACE:
2699 err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
2701 usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0); /* reset the current interface */
2703 case QUIRK_MIDI_STANDARD_INTERFACE:
2704 err = snd_usb_create_midi_interface(chip, iface, NULL);
2707 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
2711 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2712 altsd->bInterfaceNumber, err);
2719 * Create a stream for an Edirol UA-700/UA-25 interface. The only way
2720 * to detect the sample rate is by looking at wMaxPacketSize.
2722 static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
2723 struct usb_interface *iface)
2725 static const struct audioformat ua_format = {
2726 .format = SNDRV_PCM_FORMAT_S24_3LE,
2728 .fmt_type = USB_FORMAT_TYPE_I,
2731 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2733 struct usb_host_interface *alts;
2734 struct usb_interface_descriptor *altsd;
2735 struct audioformat *fp;
2738 /* both PCM and MIDI interfaces have 2 altsettings */
2739 if (iface->num_altsetting != 2)
2741 alts = &iface->altsetting[1];
2742 altsd = get_iface_desc(alts);
2744 if (altsd->bNumEndpoints == 2) {
2745 static const snd_usb_midi_endpoint_info_t ua700_ep = {
2746 .out_cables = 0x0003,
2749 static const snd_usb_audio_quirk_t ua700_quirk = {
2750 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2753 static const snd_usb_midi_endpoint_info_t ua25_ep = {
2754 .out_cables = 0x0001,
2757 static const snd_usb_audio_quirk_t ua25_quirk = {
2758 .type = QUIRK_MIDI_FIXED_ENDPOINT,
2761 if (chip->usb_id == USB_ID(0x0582, 0x002b))
2762 return snd_usb_create_midi_interface(chip, iface,
2765 return snd_usb_create_midi_interface(chip, iface,
2769 if (altsd->bNumEndpoints != 1)
2772 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2775 memcpy(fp, &ua_format, sizeof(*fp));
2777 fp->iface = altsd->bInterfaceNumber;
2778 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2779 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2780 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2782 switch (fp->maxpacksize) {
2784 fp->rate_max = fp->rate_min = 44100;
2788 fp->rate_max = fp->rate_min = 48000;
2792 fp->rate_max = fp->rate_min = 96000;
2795 snd_printk(KERN_ERR "unknown sample rate\n");
2800 stream = (fp->endpoint & USB_DIR_IN)
2801 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2802 err = add_audio_endpoint(chip, stream, fp);
2807 usb_set_interface(chip->dev, fp->iface, 0);
2812 * Create a stream for an Edirol UA-1000 interface.
2814 static int create_ua1000_quirk(snd_usb_audio_t *chip, struct usb_interface *iface)
2816 static const struct audioformat ua1000_format = {
2817 .format = SNDRV_PCM_FORMAT_S32_LE,
2818 .fmt_type = USB_FORMAT_TYPE_I,
2822 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2824 struct usb_host_interface *alts;
2825 struct usb_interface_descriptor *altsd;
2826 struct audioformat *fp;
2829 if (iface->num_altsetting != 2)
2831 alts = &iface->altsetting[1];
2832 altsd = get_iface_desc(alts);
2833 if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
2834 altsd->bNumEndpoints != 1)
2837 fp = kmalloc(sizeof(*fp), GFP_KERNEL);
2840 memcpy(fp, &ua1000_format, sizeof(*fp));
2842 fp->channels = alts->extra[4];
2843 fp->iface = altsd->bInterfaceNumber;
2844 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2845 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2846 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2847 fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
2849 stream = (fp->endpoint & USB_DIR_IN)
2850 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2851 err = add_audio_endpoint(chip, stream, fp);
2856 /* FIXME: playback must be synchronized to capture */
2857 usb_set_interface(chip->dev, fp->iface, 0);
2861 static int snd_usb_create_quirk(snd_usb_audio_t *chip,
2862 struct usb_interface *iface,
2863 const snd_usb_audio_quirk_t *quirk);
2866 * handle the quirks for the contained interfaces
2868 static int create_composite_quirk(snd_usb_audio_t *chip,
2869 struct usb_interface *iface,
2870 const snd_usb_audio_quirk_t *quirk)
2872 int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
2875 for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
2876 iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
2879 if (quirk->ifnum != probed_ifnum &&
2880 usb_interface_claimed(iface))
2882 err = snd_usb_create_quirk(chip, iface, quirk);
2885 if (quirk->ifnum != probed_ifnum)
2886 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2896 #define EXTIGY_FIRMWARE_SIZE_OLD 794
2897 #define EXTIGY_FIRMWARE_SIZE_NEW 483
2899 static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
2901 struct usb_host_config *config = dev->actconfig;
2904 if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
2905 le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
2906 snd_printdd("sending Extigy boot sequence...\n");
2907 /* Send message to force it to reconnect with full interface. */
2908 err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
2909 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
2910 if (err < 0) snd_printdd("error sending boot message: %d\n", err);
2911 err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
2912 &dev->descriptor, sizeof(dev->descriptor));
2913 config = dev->actconfig;
2914 if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
2915 err = usb_reset_configuration(dev);
2916 if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
2917 snd_printdd("extigy_boot: new boot length = %d\n",
2918 le16_to_cpu(get_cfg_desc(config)->wTotalLength));
2919 return -ENODEV; /* quit this anyway */
2924 static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
2927 /* TODO: enable this when high speed synchronization actually works */
2930 snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
2931 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
2932 0, 0, &buf, 1, 1000);
2934 snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
2935 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
2936 1, 2000, NULL, 0, 1000);
2945 * audio-interface quirks
2947 * returns zero if no standard audio/MIDI parsing is needed.
2948 * returns a postive value if standard audio/midi interfaces are parsed
2950 * returns a negative value at error.
2952 static int snd_usb_create_quirk(snd_usb_audio_t *chip,
2953 struct usb_interface *iface,
2954 const snd_usb_audio_quirk_t *quirk)
2956 switch (quirk->type) {
2957 case QUIRK_MIDI_FIXED_ENDPOINT:
2958 case QUIRK_MIDI_YAMAHA:
2959 case QUIRK_MIDI_MIDIMAN:
2960 case QUIRK_MIDI_NOVATION:
2961 case QUIRK_MIDI_MOTU:
2962 case QUIRK_MIDI_EMAGIC:
2963 return snd_usb_create_midi_interface(chip, iface, quirk);
2964 case QUIRK_COMPOSITE:
2965 return create_composite_quirk(chip, iface, quirk);
2966 case QUIRK_AUDIO_FIXED_ENDPOINT:
2967 return create_fixed_stream_quirk(chip, iface, quirk);
2968 case QUIRK_AUDIO_STANDARD_INTERFACE:
2969 case QUIRK_MIDI_STANDARD_INTERFACE:
2970 return create_standard_interface_quirk(chip, iface, quirk);
2971 case QUIRK_AUDIO_EDIROL_UA700_UA25:
2972 return create_ua700_ua25_quirk(chip, iface);
2973 case QUIRK_AUDIO_EDIROL_UA1000:
2974 return create_ua1000_quirk(chip, iface);
2975 case QUIRK_IGNORE_INTERFACE:
2978 snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
2985 * common proc files to show the usb device info
2987 static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
2989 snd_usb_audio_t *chip = entry->private_data;
2990 if (! chip->shutdown)
2991 snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
2994 static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
2996 snd_usb_audio_t *chip = entry->private_data;
2997 if (! chip->shutdown)
2998 snd_iprintf(buffer, "%04x:%04x\n",
2999 USB_ID_VENDOR(chip->usb_id),
3000 USB_ID_PRODUCT(chip->usb_id));
3003 static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
3005 snd_info_entry_t *entry;
3006 if (! snd_card_proc_new(chip->card, "usbbus", &entry))
3007 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
3008 if (! snd_card_proc_new(chip->card, "usbid", &entry))
3009 snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
3013 * free the chip instance
3015 * here we have to do not much, since pcm and controls are already freed
3019 static int snd_usb_audio_free(snd_usb_audio_t *chip)
3025 static int snd_usb_audio_dev_free(snd_device_t *device)
3027 snd_usb_audio_t *chip = device->device_data;
3028 return snd_usb_audio_free(chip);
3033 * create a chip instance and set its names.
3035 static int snd_usb_audio_create(struct usb_device *dev, int idx,
3036 const snd_usb_audio_quirk_t *quirk,
3037 snd_usb_audio_t **rchip)
3040 snd_usb_audio_t *chip;
3043 static snd_device_ops_t ops = {
3044 .dev_free = snd_usb_audio_dev_free,
3049 if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
3050 snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
3051 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
3055 card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
3057 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
3061 chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
3063 snd_card_free(card);
3070 chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3071 le16_to_cpu(dev->descriptor.idProduct));
3072 INIT_LIST_HEAD(&chip->pcm_list);
3073 INIT_LIST_HEAD(&chip->midi_list);
3074 INIT_LIST_HEAD(&chip->mixer_list);
3076 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
3077 snd_usb_audio_free(chip);
3078 snd_card_free(card);
3082 strcpy(card->driver, "USB-Audio");
3083 sprintf(component, "USB%04x:%04x",
3084 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
3085 snd_component_add(card, component);
3087 /* retrieve the device string as shortname */
3088 if (quirk && quirk->product_name) {
3089 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
3091 if (!dev->descriptor.iProduct ||
3092 usb_string(dev, dev->descriptor.iProduct,
3093 card->shortname, sizeof(card->shortname)) <= 0) {
3094 /* no name available from anywhere, so use ID */
3095 sprintf(card->shortname, "USB Device %#04x:%#04x",
3096 USB_ID_VENDOR(chip->usb_id),
3097 USB_ID_PRODUCT(chip->usb_id));
3101 /* retrieve the vendor and device strings as longname */
3102 if (quirk && quirk->vendor_name) {
3103 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
3105 if (dev->descriptor.iManufacturer)
3106 len = usb_string(dev, dev->descriptor.iManufacturer,
3107 card->longname, sizeof(card->longname));
3110 /* we don't really care if there isn't any vendor string */
3113 strlcat(card->longname, " ", sizeof(card->longname));
3115 strlcat(card->longname, card->shortname, sizeof(card->longname));
3117 len = strlcat(card->longname, " at ", sizeof(card->longname));
3119 if (len < sizeof(card->longname))
3120 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
3122 strlcat(card->longname,
3123 snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
3124 sizeof(card->longname));
3126 snd_usb_audio_create_proc(chip);
3134 * probe the active usb device
3136 * note that this can be called multiple times per a device, when it
3137 * includes multiple audio control interfaces.
3139 * thus we check the usb device pointer and creates the card instance
3140 * only at the first time. the successive calls of this function will
3141 * append the pcm interface to the corresponding card.
3143 static void *snd_usb_audio_probe(struct usb_device *dev,
3144 struct usb_interface *intf,
3145 const struct usb_device_id *usb_id)
3147 struct usb_host_config *config = dev->actconfig;
3148 const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info;
3150 snd_usb_audio_t *chip;
3151 struct usb_host_interface *alts;
3155 alts = &intf->altsetting[0];
3156 ifnum = get_iface_desc(alts)->bInterfaceNumber;
3157 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
3158 le16_to_cpu(dev->descriptor.idProduct));
3160 if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
3163 /* SB Extigy needs special boot-up sequence */
3164 /* if more models come, this will go to the quirk list. */
3165 if (id == USB_ID(0x041e, 0x3000)) {
3166 if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
3168 config = dev->actconfig;
3170 /* SB Audigy 2 NX needs its own boot-up magic, too */
3171 if (id == USB_ID(0x041e, 0x3020)) {
3172 if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
3177 * found a config. now register to ALSA
3180 /* check whether it's already registered */
3182 down(®ister_mutex);
3183 for (i = 0; i < SNDRV_CARDS; i++) {
3184 if (usb_chip[i] && usb_chip[i]->dev == dev) {
3185 if (usb_chip[i]->shutdown) {
3186 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
3194 /* it's a fresh one.
3195 * now look for an empty slot and create a new card instance
3197 /* first, set the current configuration for this device */
3198 if (usb_reset_configuration(dev) < 0) {
3199 snd_printk(KERN_ERR "cannot reset configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue);
3202 for (i = 0; i < SNDRV_CARDS; i++)
3203 if (enable[i] && ! usb_chip[i] &&
3204 (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
3205 (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
3206 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
3209 snd_card_set_dev(chip->card, &intf->dev);
3213 snd_printk(KERN_ERR "no available usb audio device\n");
3218 err = 1; /* continue */
3219 if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
3220 /* need some special handlings */
3221 if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
3226 /* create normal USB audio interfaces */
3227 if (snd_usb_create_streams(chip, ifnum) < 0 ||
3228 snd_usb_create_mixer(chip, ifnum) < 0) {
3233 /* we are allowed to call snd_card_register() many times */
3234 if (snd_card_register(chip->card) < 0) {
3238 usb_chip[chip->index] = chip;
3239 chip->num_interfaces++;
3240 up(®ister_mutex);
3244 if (chip && !chip->num_interfaces)
3245 snd_card_free(chip->card);
3246 up(®ister_mutex);
3252 * we need to take care of counter, since disconnection can be called also
3253 * many times as well as usb_audio_probe().
3255 static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
3257 snd_usb_audio_t *chip;
3259 struct list_head *p;
3261 if (ptr == (void *)-1L)
3266 down(®ister_mutex);
3268 chip->num_interfaces--;
3269 if (chip->num_interfaces <= 0) {
3270 snd_card_disconnect(card);
3271 /* release the pcm resources */
3272 list_for_each(p, &chip->pcm_list) {
3273 snd_usb_stream_disconnect(p);
3275 /* release the midi resources */
3276 list_for_each(p, &chip->midi_list) {
3277 snd_usbmidi_disconnect(p);
3279 /* release mixer resources */
3280 list_for_each(p, &chip->mixer_list) {
3281 snd_usb_mixer_disconnect(p);
3283 usb_chip[chip->index] = NULL;
3284 up(®ister_mutex);
3285 snd_card_free(card);
3287 up(®ister_mutex);
3292 * new 2.5 USB kernel API
3294 static int usb_audio_probe(struct usb_interface *intf,
3295 const struct usb_device_id *id)
3298 chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
3300 dev_set_drvdata(&intf->dev, chip);
3306 static void usb_audio_disconnect(struct usb_interface *intf)
3308 snd_usb_audio_disconnect(interface_to_usbdev(intf),
3309 dev_get_drvdata(&intf->dev));
3313 static int __init snd_usb_audio_init(void)
3315 if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
3316 printk(KERN_WARNING "invalid nrpacks value.\n");
3319 usb_register(&usb_audio_driver);
3324 static void __exit snd_usb_audio_cleanup(void)
3326 usb_deregister(&usb_audio_driver);
3329 module_init(snd_usb_audio_init);
3330 module_exit(snd_usb_audio_cleanup);