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code style scripts/checkpatch.pl (linux-3.9-rc1) formatting
[linux-2.6.34.14-moxart.git] / sound / usb / ua101.c
blob3d458d3b99621209905c60213f2b86ad3f7aaa9b
1 /*
2 * Edirol UA-101/UA-1000 driver
3 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
4 *
5 * This driver is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2.
7 *
8 * This driver is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this driver. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/usb.h>
21 #include <linux/usb/audio.h>
22 #include <sound/core.h>
23 #include <sound/initval.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include "usbaudio.h"
27
28 MODULE_DESCRIPTION("Edirol UA-101/1000 driver");
29 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
30 MODULE_LICENSE("GPL v2");
31 MODULE_SUPPORTED_DEVICE("{{Edirol,UA-101},{Edirol,UA-1000}}");
32
33 /*
34 * Should not be lower than the minimum scheduling delay of the host
35 * controller. Some Intel controllers need more than one frame; as long as
36 * that driver doesn't tell us about this, use 1.5 frames just to be sure.
37 */
38 #define MIN_QUEUE_LENGTH 12
39 /* Somewhat random. */
40 #define MAX_QUEUE_LENGTH 30
41 /*
42 * This magic value optimizes memory usage efficiency for the UA-101's packet
43 * sizes at all sample rates, taking into account the stupid cache pool sizes
44 * that usb_buffer_alloc() uses.
45 */
46 #define DEFAULT_QUEUE_LENGTH 21
47
48 #define MAX_PACKET_SIZE 672 /* hardware specific */
49 #define MAX_MEMORY_BUFFERS DIV_ROUND_UP(MAX_QUEUE_LENGTH, \
50 PAGE_SIZE / MAX_PACKET_SIZE)
51
52 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
53 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
54 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
55 static unsigned int queue_length = 21;
56
57 module_param_array(index, int, NULL, 0444);
58 MODULE_PARM_DESC(index, "card index");
59 module_param_array(id, charp, NULL, 0444);
60 MODULE_PARM_DESC(id, "ID string");
61 module_param_array(enable, bool, NULL, 0444);
62 MODULE_PARM_DESC(enable, "enable card");
63 module_param(queue_length, uint, 0644);
64 MODULE_PARM_DESC(queue_length, "USB queue length in microframes, "
65 __stringify(MIN_QUEUE_LENGTH)"-"__stringify(MAX_QUEUE_LENGTH));
66
67 enum {
68 INTF_PLAYBACK,
69 INTF_CAPTURE,
70 INTF_MIDI,
71
72 INTF_COUNT
73 };
74
75 /* bits in struct ua101::states */
76 enum {
77 USB_CAPTURE_RUNNING,
78 USB_PLAYBACK_RUNNING,
79 ALSA_CAPTURE_OPEN,
80 ALSA_PLAYBACK_OPEN,
81 ALSA_CAPTURE_RUNNING,
82 ALSA_PLAYBACK_RUNNING,
83 CAPTURE_URB_COMPLETED,
84 PLAYBACK_URB_COMPLETED,
85 DISCONNECTED,
86 };
87
88 struct ua101 {
89 struct usb_device *dev;
90 struct snd_card *card;
91 struct usb_interface *intf[INTF_COUNT];
92 int card_index;
93 struct snd_pcm *pcm;
94 struct list_head midi_list;
95 u64 format_bit;
96 unsigned int rate;
97 unsigned int packets_per_second;
98 spinlock_t lock;
99 struct mutex mutex;
100 unsigned long states;
101
102 /* FIFO to synchronize playback rate to capture rate */
103 unsigned int rate_feedback_start;
104 unsigned int rate_feedback_count;
105 u8 rate_feedback[MAX_QUEUE_LENGTH];
106
107 struct list_head ready_playback_urbs;
108 struct tasklet_struct playback_tasklet;
109 wait_queue_head_t alsa_capture_wait;
110 wait_queue_head_t rate_feedback_wait;
111 wait_queue_head_t alsa_playback_wait;
112 struct ua101_stream {
113 struct snd_pcm_substream *substream;
114 unsigned int usb_pipe;
115 unsigned int channels;
116 unsigned int frame_bytes;
117 unsigned int max_packet_bytes;
118 unsigned int period_pos;
119 unsigned int buffer_pos;
120 unsigned int queue_length;
121 struct ua101_urb {
122 struct urb urb;
123 struct usb_iso_packet_descriptor iso_frame_desc[1];
124 struct list_head ready_list;
125 } *urbs[MAX_QUEUE_LENGTH];
126 struct {
127 unsigned int size;
128 void *addr;
129 dma_addr_t dma;
130 } buffers[MAX_MEMORY_BUFFERS];
131 } capture, playback;
132 };
133
134 static DEFINE_MUTEX(devices_mutex);
135 static unsigned int devices_used;
136 static struct usb_driver ua101_driver;
137
138 static void abort_alsa_playback(struct ua101 *ua);
139 static void abort_alsa_capture(struct ua101 *ua);
140
141 static const char *usb_error_string(int err)
142 {
143 switch (err) {
144 case -ENODEV:
145 return "no device";
146 case -ENOENT:
147 return "endpoint not enabled";
148 case -EPIPE:
149 return "endpoint stalled";
150 case -ENOSPC:
151 return "not enough bandwidth";
152 case -ESHUTDOWN:
153 return "device disabled";
154 case -EHOSTUNREACH:
155 return "device suspended";
156 case -EINVAL:
157 case -EAGAIN:
158 case -EFBIG:
159 case -EMSGSIZE:
160 return "internal error";
161 default:
162 return "unknown error";
163 }
164 }
165
166 static void abort_usb_capture(struct ua101 *ua)
167 {
168 if (test_and_clear_bit(USB_CAPTURE_RUNNING, &ua->states)) {
169 wake_up(&ua->alsa_capture_wait);
170 wake_up(&ua->rate_feedback_wait);
171 }
172 }
173
174 static void abort_usb_playback(struct ua101 *ua)
175 {
176 if (test_and_clear_bit(USB_PLAYBACK_RUNNING, &ua->states))
177 wake_up(&ua->alsa_playback_wait);
178 }
179
180 static void playback_urb_complete(struct urb *usb_urb)
181 {
182 struct ua101_urb *urb = (struct ua101_urb *)usb_urb;
183 struct ua101 *ua = urb->urb.context;
184 unsigned long flags;
185
186 if (unlikely(urb->urb.status == -ENOENT || /* unlinked */
187 urb->urb.status == -ENODEV || /* device removed */
188 urb->urb.status == -ECONNRESET || /* unlinked */
189 urb->urb.status == -ESHUTDOWN)) { /* device disabled */
190 abort_usb_playback(ua);
191 abort_alsa_playback(ua);
192 return;
193 }
194
195 if (test_bit(USB_PLAYBACK_RUNNING, &ua->states)) {
196 /* append URB to FIFO */
197 spin_lock_irqsave(&ua->lock, flags);
198 list_add_tail(&urb->ready_list, &ua->ready_playback_urbs);
199 if (ua->rate_feedback_count > 0)
200 tasklet_schedule(&ua->playback_tasklet);
201 ua->playback.substream->runtime->delay -=
202 urb->urb.iso_frame_desc[0].length /
203 ua->playback.frame_bytes;
204 spin_unlock_irqrestore(&ua->lock, flags);
205 }
206 }
207
208 static void first_playback_urb_complete(struct urb *urb)
209 {
210 struct ua101 *ua = urb->context;
211
212 urb->complete = playback_urb_complete;
213 playback_urb_complete(urb);
214
215 set_bit(PLAYBACK_URB_COMPLETED, &ua->states);
216 wake_up(&ua->alsa_playback_wait);
217 }
218
219 /* copy data from the ALSA ring buffer into the URB buffer */
220 static bool copy_playback_data(struct ua101_stream *stream, struct urb *urb,
221 unsigned int frames)
222 {
223 struct snd_pcm_runtime *runtime;
224 unsigned int frame_bytes, frames1;
225 const u8 *source;
226
227 runtime = stream->substream->runtime;
228 frame_bytes = stream->frame_bytes;
229 source = runtime->dma_area + stream->buffer_pos * frame_bytes;
230 if (stream->buffer_pos + frames <= runtime->buffer_size) {
231 memcpy(urb->transfer_buffer, source, frames * frame_bytes);
232 } else {
233 /* wrap around at end of ring buffer */
234 frames1 = runtime->buffer_size - stream->buffer_pos;
235 memcpy(urb->transfer_buffer, source, frames1 * frame_bytes);
236 memcpy(urb->transfer_buffer + frames1 * frame_bytes,
237 runtime->dma_area, (frames - frames1) * frame_bytes);
238 }
239
240 stream->buffer_pos += frames;
241 if (stream->buffer_pos >= runtime->buffer_size)
242 stream->buffer_pos -= runtime->buffer_size;
243 stream->period_pos += frames;
244 if (stream->period_pos >= runtime->period_size) {
245 stream->period_pos -= runtime->period_size;
246 return true;
247 }
248 return false;
249 }
250
251 static inline void add_with_wraparound(struct ua101 *ua,
252 unsigned int *value, unsigned int add)
253 {
254 *value += add;
255 if (*value >= ua->playback.queue_length)
256 *value -= ua->playback.queue_length;
257 }
258
259 static void playback_tasklet(unsigned long data)
260 {
261 struct ua101 *ua = (void *)data;
262 unsigned long flags;
263 unsigned int frames;
264 struct ua101_urb *urb;
265 bool do_period_elapsed = false;
266 int err;
267
268 if (unlikely(!test_bit(USB_PLAYBACK_RUNNING, &ua->states)))
269 return;
270
271 /*
272 * Synchronizing the playback rate to the capture rate is done by using
273 * the same sequence of packet sizes for both streams.
274 * Submitting a playback URB therefore requires both a ready URB and
275 * the size of the corresponding capture packet, i.e., both playback
276 * and capture URBs must have been completed. Since the USB core does
277 * not guarantee that playback and capture complete callbacks are
278 * called alternately, we use two FIFOs for packet sizes and read URBs;
279 * submitting playback URBs is possible as long as both FIFOs are
280 * nonempty.
281 */
282 spin_lock_irqsave(&ua->lock, flags);
283 while (ua->rate_feedback_count > 0 &&
284 !list_empty(&ua->ready_playback_urbs)) {
285 /* take packet size out of FIFO */
286 frames = ua->rate_feedback[ua->rate_feedback_start];
287 add_with_wraparound(ua, &ua->rate_feedback_start, 1);
288 ua->rate_feedback_count--;
289
290 /* take URB out of FIFO */
291 urb = list_first_entry(&ua->ready_playback_urbs,
292 struct ua101_urb, ready_list);
293 list_del(&urb->ready_list);
294
295 /* fill packet with data or silence */
296 urb->urb.iso_frame_desc[0].length =
297 frames * ua->playback.frame_bytes;
298 if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states))
299 do_period_elapsed |= copy_playback_data(&ua->playback,
300 &urb->urb,
301 frames);
302 else
303 memset(urb->urb.transfer_buffer, 0,
304 urb->urb.iso_frame_desc[0].length);
305
306 /* and off you go ... */
307 err = usb_submit_urb(&urb->urb, GFP_ATOMIC);
308 if (unlikely(err < 0)) {
309 spin_unlock_irqrestore(&ua->lock, flags);
310 abort_usb_playback(ua);
311 abort_alsa_playback(ua);
312 dev_err(&ua->dev->dev, "USB request error %d: %s\n",
313 err, usb_error_string(err));
314 return;
315 }
316 ua->playback.substream->runtime->delay += frames;
317 }
318 spin_unlock_irqrestore(&ua->lock, flags);
319 if (do_period_elapsed)
320 snd_pcm_period_elapsed(ua->playback.substream);
321 }
322
323 /* copy data from the URB buffer into the ALSA ring buffer */
324 static bool copy_capture_data(struct ua101_stream *stream, struct urb *urb,
325 unsigned int frames)
326 {
327 struct snd_pcm_runtime *runtime;
328 unsigned int frame_bytes, frames1;
329 u8 *dest;
330
331 runtime = stream->substream->runtime;
332 frame_bytes = stream->frame_bytes;
333 dest = runtime->dma_area + stream->buffer_pos * frame_bytes;
334 if (stream->buffer_pos + frames <= runtime->buffer_size) {
335 memcpy(dest, urb->transfer_buffer, frames * frame_bytes);
336 } else {
337 /* wrap around at end of ring buffer */
338 frames1 = runtime->buffer_size - stream->buffer_pos;
339 memcpy(dest, urb->transfer_buffer, frames1 * frame_bytes);
340 memcpy(runtime->dma_area,
341 urb->transfer_buffer + frames1 * frame_bytes,
342 (frames - frames1) * frame_bytes);
343 }
344
345 stream->buffer_pos += frames;
346 if (stream->buffer_pos >= runtime->buffer_size)
347 stream->buffer_pos -= runtime->buffer_size;
348 stream->period_pos += frames;
349 if (stream->period_pos >= runtime->period_size) {
350 stream->period_pos -= runtime->period_size;
351 return true;
352 }
353 return false;
354 }
355
356 static void capture_urb_complete(struct urb *urb)
357 {
358 struct ua101 *ua = urb->context;
359 struct ua101_stream *stream = &ua->capture;
360 unsigned long flags;
361 unsigned int frames, write_ptr;
362 bool do_period_elapsed;
363 int err;
364
365 if (unlikely(urb->status == -ENOENT || /* unlinked */
366 urb->status == -ENODEV || /* device removed */
367 urb->status == -ECONNRESET || /* unlinked */
368 urb->status == -ESHUTDOWN)) /* device disabled */
369 goto stream_stopped;
370
371 if (urb->status >= 0 && urb->iso_frame_desc[0].status >= 0)
372 frames = urb->iso_frame_desc[0].actual_length /
373 stream->frame_bytes;
374 else
375 frames = 0;
376
377 spin_lock_irqsave(&ua->lock, flags);
378
379 if (frames > 0 && test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
380 do_period_elapsed = copy_capture_data(stream, urb, frames);
381 else
382 do_period_elapsed = false;
383
384 if (test_bit(USB_CAPTURE_RUNNING, &ua->states)) {
385 err = usb_submit_urb(urb, GFP_ATOMIC);
386 if (unlikely(err < 0)) {
387 spin_unlock_irqrestore(&ua->lock, flags);
388 dev_err(&ua->dev->dev, "USB request error %d: %s\n",
389 err, usb_error_string(err));
390 goto stream_stopped;
391 }
392
393 /* append packet size to FIFO */
394 write_ptr = ua->rate_feedback_start;
395 add_with_wraparound(ua, &write_ptr, ua->rate_feedback_count);
396 ua->rate_feedback[write_ptr] = frames;
397 if (ua->rate_feedback_count < ua->playback.queue_length) {
398 ua->rate_feedback_count++;
399 if (ua->rate_feedback_count ==
400 ua->playback.queue_length)
401 wake_up(&ua->rate_feedback_wait);
402 } else {
403 /*
404 * Ring buffer overflow; this happens when the playback
405 * stream is not running. Throw away the oldest entry,
406 * so that the playback stream, when it starts, sees
407 * the most recent packet sizes.
408 */
409 add_with_wraparound(ua, &ua->rate_feedback_start, 1);
410 }
411 if (test_bit(USB_PLAYBACK_RUNNING, &ua->states) &&
412 !list_empty(&ua->ready_playback_urbs))
413 tasklet_schedule(&ua->playback_tasklet);
414 }
415
416 spin_unlock_irqrestore(&ua->lock, flags);
417
418 if (do_period_elapsed)
419 snd_pcm_period_elapsed(stream->substream);
420
421 return;
422
423 stream_stopped:
424 abort_usb_playback(ua);
425 abort_usb_capture(ua);
426 abort_alsa_playback(ua);
427 abort_alsa_capture(ua);
428 }
429
430 static void first_capture_urb_complete(struct urb *urb)
431 {
432 struct ua101 *ua = urb->context;
433
434 urb->complete = capture_urb_complete;
435 capture_urb_complete(urb);
436
437 set_bit(CAPTURE_URB_COMPLETED, &ua->states);
438 wake_up(&ua->alsa_capture_wait);
439 }
440
441 static int submit_stream_urbs(struct ua101 *ua, struct ua101_stream *stream)
442 {
443 unsigned int i;
444
445 for (i = 0; i < stream->queue_length; ++i) {
446 int err = usb_submit_urb(&stream->urbs[i]->urb, GFP_KERNEL);
447 if (err < 0) {
448 dev_err(&ua->dev->dev, "USB request error %d: %s\n",
449 err, usb_error_string(err));
450 return err;
451 }
452 }
453 return 0;
454 }
455
456 static void kill_stream_urbs(struct ua101_stream *stream)
457 {
458 unsigned int i;
459
460 for (i = 0; i < stream->queue_length; ++i)
461 usb_kill_urb(&stream->urbs[i]->urb);
462 }
463
464 static int enable_iso_interface(struct ua101 *ua, unsigned int intf_index)
465 {
466 struct usb_host_interface *alts;
467
468 alts = ua->intf[intf_index]->cur_altsetting;
469 if (alts->desc.bAlternateSetting != 1) {
470 int err = usb_set_interface(ua->dev,
471 alts->desc.bInterfaceNumber, 1);
472 if (err < 0) {
473 dev_err(&ua->dev->dev,
474 "cannot initialize interface; error %d: %s\n",
475 err, usb_error_string(err));
476 return err;
477 }
478 }
479 return 0;
480 }
481
482 static void disable_iso_interface(struct ua101 *ua, unsigned int intf_index)
483 {
484 struct usb_host_interface *alts;
485
486 alts = ua->intf[intf_index]->cur_altsetting;
487 if (alts->desc.bAlternateSetting != 0) {
488 int err = usb_set_interface(ua->dev,
489 alts->desc.bInterfaceNumber, 0);
490 if (err < 0 && !test_bit(DISCONNECTED, &ua->states))
491 dev_warn(&ua->dev->dev,
492 "interface reset failed; error %d: %s\n",
493 err, usb_error_string(err));
494 }
495 }
496
497 static void stop_usb_capture(struct ua101 *ua)
498 {
499 clear_bit(USB_CAPTURE_RUNNING, &ua->states);
500
501 kill_stream_urbs(&ua->capture);
502
503 disable_iso_interface(ua, INTF_CAPTURE);
504 }
505
506 static int start_usb_capture(struct ua101 *ua)
507 {
508 int err;
509
510 if (test_bit(DISCONNECTED, &ua->states))
511 return -ENODEV;
512
513 if (test_bit(USB_CAPTURE_RUNNING, &ua->states))
514 return 0;
515
516 kill_stream_urbs(&ua->capture);
517
518 err = enable_iso_interface(ua, INTF_CAPTURE);
519 if (err < 0)
520 return err;
521
522 clear_bit(CAPTURE_URB_COMPLETED, &ua->states);
523 ua->capture.urbs[0]->urb.complete = first_capture_urb_complete;
524 ua->rate_feedback_start = 0;
525 ua->rate_feedback_count = 0;
526
527 set_bit(USB_CAPTURE_RUNNING, &ua->states);
528 err = submit_stream_urbs(ua, &ua->capture);
529 if (err < 0)
530 stop_usb_capture(ua);
531 return err;
532 }
533
534 static void stop_usb_playback(struct ua101 *ua)
535 {
536 clear_bit(USB_PLAYBACK_RUNNING, &ua->states);
537
538 kill_stream_urbs(&ua->playback);
539
540 tasklet_kill(&ua->playback_tasklet);
541
542 disable_iso_interface(ua, INTF_PLAYBACK);
543 }
544
545 static int start_usb_playback(struct ua101 *ua)
546 {
547 unsigned int i, frames;
548 struct urb *urb;
549 int err = 0;
550
551 if (test_bit(DISCONNECTED, &ua->states))
552 return -ENODEV;
553
554 if (test_bit(USB_PLAYBACK_RUNNING, &ua->states))
555 return 0;
556
557 kill_stream_urbs(&ua->playback);
558 tasklet_kill(&ua->playback_tasklet);
559
560 err = enable_iso_interface(ua, INTF_PLAYBACK);
561 if (err < 0)
562 return err;
563
564 clear_bit(PLAYBACK_URB_COMPLETED, &ua->states);
565 ua->playback.urbs[0]->urb.complete =
566 first_playback_urb_complete;
567 spin_lock_irq(&ua->lock);
568 INIT_LIST_HEAD(&ua->ready_playback_urbs);
569 spin_unlock_irq(&ua->lock);
570
571 /*
572 * We submit the initial URBs all at once, so we have to wait for the
573 * packet size FIFO to be full.
574 */
575 wait_event(ua->rate_feedback_wait,
576 ua->rate_feedback_count >= ua->playback.queue_length ||
577 !test_bit(USB_CAPTURE_RUNNING, &ua->states) ||
578 test_bit(DISCONNECTED, &ua->states));
579 if (test_bit(DISCONNECTED, &ua->states)) {
580 stop_usb_playback(ua);
581 return -ENODEV;
582 }
583 if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) {
584 stop_usb_playback(ua);
585 return -EIO;
586 }
587
588 for (i = 0; i < ua->playback.queue_length; ++i) {
589 /* all initial URBs contain silence */
590 spin_lock_irq(&ua->lock);
591 frames = ua->rate_feedback[ua->rate_feedback_start];
592 add_with_wraparound(ua, &ua->rate_feedback_start, 1);
593 ua->rate_feedback_count--;
594 spin_unlock_irq(&ua->lock);
595 urb = &ua->playback.urbs[i]->urb;
596 urb->iso_frame_desc[0].length =
597 frames * ua->playback.frame_bytes;
598 memset(urb->transfer_buffer, 0,
599 urb->iso_frame_desc[0].length);
600 }
601
602 set_bit(USB_PLAYBACK_RUNNING, &ua->states);
603 err = submit_stream_urbs(ua, &ua->playback);
604 if (err < 0)
605 stop_usb_playback(ua);
606 return err;
607 }
608
609 static void abort_alsa_capture(struct ua101 *ua)
610 {
611 if (test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
612 snd_pcm_stop(ua->capture.substream, SNDRV_PCM_STATE_XRUN);
613 }
614
615 static void abort_alsa_playback(struct ua101 *ua)
616 {
617 if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states))
618 snd_pcm_stop(ua->playback.substream, SNDRV_PCM_STATE_XRUN);
619 }
620
621 static int set_stream_hw(struct ua101 *ua, struct snd_pcm_substream *substream,
622 unsigned int channels)
623 {
624 int err;
625
626 substream->runtime->hw.info =
627 SNDRV_PCM_INFO_MMAP |
628 SNDRV_PCM_INFO_MMAP_VALID |
629 SNDRV_PCM_INFO_BATCH |
630 SNDRV_PCM_INFO_INTERLEAVED |
631 SNDRV_PCM_INFO_BLOCK_TRANSFER |
632 SNDRV_PCM_INFO_FIFO_IN_FRAMES;
633 substream->runtime->hw.formats = ua->format_bit;
634 substream->runtime->hw.rates = snd_pcm_rate_to_rate_bit(ua->rate);
635 substream->runtime->hw.rate_min = ua->rate;
636 substream->runtime->hw.rate_max = ua->rate;
637 substream->runtime->hw.channels_min = channels;
638 substream->runtime->hw.channels_max = channels;
639 substream->runtime->hw.buffer_bytes_max = 45000 * 1024;
640 substream->runtime->hw.period_bytes_min = 1;
641 substream->runtime->hw.period_bytes_max = UINT_MAX;
642 substream->runtime->hw.periods_min = 2;
643 substream->runtime->hw.periods_max = UINT_MAX;
644 err = snd_pcm_hw_constraint_minmax(substream->runtime,
645 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
646 1500000 / ua->packets_per_second,
647 8192000);
648 if (err < 0)
649 return err;
650 err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
651 return err;
652 }
653
654 static int capture_pcm_open(struct snd_pcm_substream *substream)
655 {
656 struct ua101 *ua = substream->private_data;
657 int err;
658
659 ua->capture.substream = substream;
660 err = set_stream_hw(ua, substream, ua->capture.channels);
661 if (err < 0)
662 return err;
663 substream->runtime->hw.fifo_size =
664 DIV_ROUND_CLOSEST(ua->rate, ua->packets_per_second);
665 substream->runtime->delay = substream->runtime->hw.fifo_size;
666
667 mutex_lock(&ua->mutex);
668 err = start_usb_capture(ua);
669 if (err >= 0)
670 set_bit(ALSA_CAPTURE_OPEN, &ua->states);
671 mutex_unlock(&ua->mutex);
672 return err;
673 }
674
675 static int playback_pcm_open(struct snd_pcm_substream *substream)
676 {
677 struct ua101 *ua = substream->private_data;
678 int err;
679
680 ua->playback.substream = substream;
681 err = set_stream_hw(ua, substream, ua->playback.channels);
682 if (err < 0)
683 return err;
684 substream->runtime->hw.fifo_size =
685 DIV_ROUND_CLOSEST(ua->rate * ua->playback.queue_length,
686 ua->packets_per_second);
687
688 mutex_lock(&ua->mutex);
689 err = start_usb_capture(ua);
690 if (err < 0)
691 goto error;
692 err = start_usb_playback(ua);
693 if (err < 0) {
694 if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states))
695 stop_usb_capture(ua);
696 goto error;
697 }
698 set_bit(ALSA_PLAYBACK_OPEN, &ua->states);
699 error:
700 mutex_unlock(&ua->mutex);
701 return err;
702 }
703
704 static int capture_pcm_close(struct snd_pcm_substream *substream)
705 {
706 struct ua101 *ua = substream->private_data;
707
708 mutex_lock(&ua->mutex);
709 clear_bit(ALSA_CAPTURE_OPEN, &ua->states);
710 if (!test_bit(ALSA_PLAYBACK_OPEN, &ua->states))
711 stop_usb_capture(ua);
712 mutex_unlock(&ua->mutex);
713 return 0;
714 }
715
716 static int playback_pcm_close(struct snd_pcm_substream *substream)
717 {
718 struct ua101 *ua = substream->private_data;
719
720 mutex_lock(&ua->mutex);
721 stop_usb_playback(ua);
722 clear_bit(ALSA_PLAYBACK_OPEN, &ua->states);
723 if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states))
724 stop_usb_capture(ua);
725 mutex_unlock(&ua->mutex);
726 return 0;
727 }
728
729 static int capture_pcm_hw_params(struct snd_pcm_substream *substream,
730 struct snd_pcm_hw_params *hw_params)
731 {
732 struct ua101 *ua = substream->private_data;
733 int err;
734
735 mutex_lock(&ua->mutex);
736 err = start_usb_capture(ua);
737 mutex_unlock(&ua->mutex);
738 if (err < 0)
739 return err;
740
741 return snd_pcm_lib_alloc_vmalloc_buffer(substream,
742 params_buffer_bytes(hw_params));
743 }
744
745 static int playback_pcm_hw_params(struct snd_pcm_substream *substream,
746 struct snd_pcm_hw_params *hw_params)
747 {
748 struct ua101 *ua = substream->private_data;
749 int err;
750
751 mutex_lock(&ua->mutex);
752 err = start_usb_capture(ua);
753 if (err >= 0)
754 err = start_usb_playback(ua);
755 mutex_unlock(&ua->mutex);
756 if (err < 0)
757 return err;
758
759 return snd_pcm_lib_alloc_vmalloc_buffer(substream,
760 params_buffer_bytes(hw_params));
761 }
762
763 static int ua101_pcm_hw_free(struct snd_pcm_substream *substream)
764 {
765 return snd_pcm_lib_free_vmalloc_buffer(substream);
766 }
767
768 static int capture_pcm_prepare(struct snd_pcm_substream *substream)
769 {
770 struct ua101 *ua = substream->private_data;
771 int err;
772
773 mutex_lock(&ua->mutex);
774 err = start_usb_capture(ua);
775 mutex_unlock(&ua->mutex);
776 if (err < 0)
777 return err;
778
779 /*
780 * The EHCI driver schedules the first packet of an iso stream at 10 ms
781 * in the future, i.e., no data is actually captured for that long.
782 * Take the wait here so that the stream is known to be actually
783 * running when the start trigger has been called.
784 */
785 wait_event(ua->alsa_capture_wait,
786 test_bit(CAPTURE_URB_COMPLETED, &ua->states) ||
787 !test_bit(USB_CAPTURE_RUNNING, &ua->states));
788 if (test_bit(DISCONNECTED, &ua->states))
789 return -ENODEV;
790 if (!test_bit(USB_CAPTURE_RUNNING, &ua->states))
791 return -EIO;
792
793 ua->capture.period_pos = 0;
794 ua->capture.buffer_pos = 0;
795 return 0;
796 }
797
798 static int playback_pcm_prepare(struct snd_pcm_substream *substream)
799 {
800 struct ua101 *ua = substream->private_data;
801 int err;
802
803 mutex_lock(&ua->mutex);
804 err = start_usb_capture(ua);
805 if (err >= 0)
806 err = start_usb_playback(ua);
807 mutex_unlock(&ua->mutex);
808 if (err < 0)
809 return err;
810
811 /* see the comment in capture_pcm_prepare() */
812 wait_event(ua->alsa_playback_wait,
813 test_bit(PLAYBACK_URB_COMPLETED, &ua->states) ||
814 !test_bit(USB_PLAYBACK_RUNNING, &ua->states));
815 if (test_bit(DISCONNECTED, &ua->states))
816 return -ENODEV;
817 if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states))
818 return -EIO;
819
820 substream->runtime->delay = 0;
821 ua->playback.period_pos = 0;
822 ua->playback.buffer_pos = 0;
823 return 0;
824 }
825
826 static int capture_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
827 {
828 struct ua101 *ua = substream->private_data;
829
830 switch (cmd) {
831 case SNDRV_PCM_TRIGGER_START:
832 if (!test_bit(USB_CAPTURE_RUNNING, &ua->states))
833 return -EIO;
834 set_bit(ALSA_CAPTURE_RUNNING, &ua->states);
835 return 0;
836 case SNDRV_PCM_TRIGGER_STOP:
837 clear_bit(ALSA_CAPTURE_RUNNING, &ua->states);
838 return 0;
839 default:
840 return -EINVAL;
841 }
842 }
843
844 static int playback_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
845 {
846 struct ua101 *ua = substream->private_data;
847
848 switch (cmd) {
849 case SNDRV_PCM_TRIGGER_START:
850 if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states))
851 return -EIO;
852 set_bit(ALSA_PLAYBACK_RUNNING, &ua->states);
853 return 0;
854 case SNDRV_PCM_TRIGGER_STOP:
855 clear_bit(ALSA_PLAYBACK_RUNNING, &ua->states);
856 return 0;
857 default:
858 return -EINVAL;
859 }
860 }
861
862 static inline snd_pcm_uframes_t ua101_pcm_pointer(struct ua101 *ua,
863 struct ua101_stream *stream)
864 {
865 unsigned long flags;
866 unsigned int pos;
867
868 spin_lock_irqsave(&ua->lock, flags);
869 pos = stream->buffer_pos;
870 spin_unlock_irqrestore(&ua->lock, flags);
871 return pos;
872 }
873
874 static snd_pcm_uframes_t capture_pcm_pointer(struct snd_pcm_substream *subs)
875 {
876 struct ua101 *ua = subs->private_data;
877
878 return ua101_pcm_pointer(ua, &ua->capture);
879 }
880
881 static snd_pcm_uframes_t playback_pcm_pointer(struct snd_pcm_substream *subs)
882 {
883 struct ua101 *ua = subs->private_data;
884
885 return ua101_pcm_pointer(ua, &ua->playback);
886 }
887
888 static struct snd_pcm_ops capture_pcm_ops = {
889 .open = capture_pcm_open,
890 .close = capture_pcm_close,
891 .ioctl = snd_pcm_lib_ioctl,
892 .hw_params = capture_pcm_hw_params,
893 .hw_free = ua101_pcm_hw_free,
894 .prepare = capture_pcm_prepare,
895 .trigger = capture_pcm_trigger,
896 .pointer = capture_pcm_pointer,
897 .page = snd_pcm_lib_get_vmalloc_page,
898 .mmap = snd_pcm_lib_mmap_vmalloc,
899 };
900
901 static struct snd_pcm_ops playback_pcm_ops = {
902 .open = playback_pcm_open,
903 .close = playback_pcm_close,
904 .ioctl = snd_pcm_lib_ioctl,
905 .hw_params = playback_pcm_hw_params,
906 .hw_free = ua101_pcm_hw_free,
907 .prepare = playback_pcm_prepare,
908 .trigger = playback_pcm_trigger,
909 .pointer = playback_pcm_pointer,
910 .page = snd_pcm_lib_get_vmalloc_page,
911 .mmap = snd_pcm_lib_mmap_vmalloc,
912 };
913
914 static const struct uac_format_type_i_discrete_descriptor *
915 find_format_descriptor(struct usb_interface *interface)
916 {
917 struct usb_host_interface *alt;
918 u8 *extra;
919 int extralen;
920
921 if (interface->num_altsetting != 2) {
922 dev_err(&interface->dev, "invalid num_altsetting\n");
923 return NULL;
924 }
925
926 alt = &interface->altsetting[0];
927 if (alt->desc.bNumEndpoints != 0) {
928 dev_err(&interface->dev, "invalid bNumEndpoints\n");
929 return NULL;
930 }
931
932 alt = &interface->altsetting[1];
933 if (alt->desc.bNumEndpoints != 1) {
934 dev_err(&interface->dev, "invalid bNumEndpoints\n");
935 return NULL;
936 }
937
938 extra = alt->extra;
939 extralen = alt->extralen;
940 while (extralen >= sizeof(struct usb_descriptor_header)) {
941 struct uac_format_type_i_discrete_descriptor *desc;
942
943 desc = (struct uac_format_type_i_discrete_descriptor *)extra;
944 if (desc->bLength > extralen) {
945 dev_err(&interface->dev, "descriptor overflow\n");
946 return NULL;
947 }
948 if (desc->bLength == UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1) &&
949 desc->bDescriptorType == USB_DT_CS_INTERFACE &&
950 desc->bDescriptorSubtype == UAC_FORMAT_TYPE) {
951 if (desc->bFormatType != UAC_FORMAT_TYPE_I_PCM ||
952 desc->bSamFreqType != 1) {
953 dev_err(&interface->dev,
954 "invalid format type\n");
955 return NULL;
956 }
957 return desc;
958 }
959 extralen -= desc->bLength;
960 extra += desc->bLength;
961 }
962 dev_err(&interface->dev, "sample format descriptor not found\n");
963 return NULL;
964 }
965
966 static int detect_usb_format(struct ua101 *ua)
967 {
968 const struct uac_format_type_i_discrete_descriptor *fmt_capture;
969 const struct uac_format_type_i_discrete_descriptor *fmt_playback;
970 const struct usb_endpoint_descriptor *epd;
971 unsigned int rate2;
972
973 fmt_capture = find_format_descriptor(ua->intf[INTF_CAPTURE]);
974 fmt_playback = find_format_descriptor(ua->intf[INTF_PLAYBACK]);
975 if (!fmt_capture || !fmt_playback)
976 return -ENXIO;
977
978 switch (fmt_capture->bSubframeSize) {
979 case 3:
980 ua->format_bit = SNDRV_PCM_FMTBIT_S24_3LE;
981 break;
982 case 4:
983 ua->format_bit = SNDRV_PCM_FMTBIT_S32_LE;
984 break;
985 default:
986 dev_err(&ua->dev->dev, "sample width is not 24 or 32 bits\n");
987 return -ENXIO;
988 }
989 if (fmt_capture->bSubframeSize != fmt_playback->bSubframeSize) {
990 dev_err(&ua->dev->dev,
991 "playback/capture sample widths do not match\n");
992 return -ENXIO;
993 }
994
995 if (fmt_capture->bBitResolution != 24 ||
996 fmt_playback->bBitResolution != 24) {
997 dev_err(&ua->dev->dev, "sample width is not 24 bits\n");
998 return -ENXIO;
999 }
1000
1001 ua->rate = combine_triple(fmt_capture->tSamFreq[0]);
1002 rate2 = combine_triple(fmt_playback->tSamFreq[0]);
1003 if (ua->rate != rate2) {
1004 dev_err(&ua->dev->dev,
1005 "playback/capture rates do not match: %u/%u\n",
1006 rate2, ua->rate);
1007 return -ENXIO;
1008 }
1009
1010 switch (ua->dev->speed) {
1011 case USB_SPEED_FULL:
1012 ua->packets_per_second = 1000;
1013 break;
1014 case USB_SPEED_HIGH:
1015 ua->packets_per_second = 8000;
1016 break;
1017 default:
1018 dev_err(&ua->dev->dev, "unknown device speed\n");
1019 return -ENXIO;
1020 }
1021
1022 ua->capture.channels = fmt_capture->bNrChannels;
1023 ua->playback.channels = fmt_playback->bNrChannels;
1024 ua->capture.frame_bytes =
1025 fmt_capture->bSubframeSize * ua->capture.channels;
1026 ua->playback.frame_bytes =
1027 fmt_playback->bSubframeSize * ua->playback.channels;
1028
1029 epd = &ua->intf[INTF_CAPTURE]->altsetting[1].endpoint[0].desc;
1030 if (!usb_endpoint_is_isoc_in(epd)) {
1031 dev_err(&ua->dev->dev, "invalid capture endpoint\n");
1032 return -ENXIO;
1033 }
1034 ua->capture.usb_pipe = usb_rcvisocpipe(ua->dev, usb_endpoint_num(epd));
1035 ua->capture.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize);
1036
1037 epd = &ua->intf[INTF_PLAYBACK]->altsetting[1].endpoint[0].desc;
1038 if (!usb_endpoint_is_isoc_out(epd)) {
1039 dev_err(&ua->dev->dev, "invalid playback endpoint\n");
1040 return -ENXIO;
1041 }
1042 ua->playback.usb_pipe = usb_sndisocpipe(ua->dev, usb_endpoint_num(epd));
1043 ua->playback.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize);
1044 return 0;
1045 }
1046
1047 static int alloc_stream_buffers(struct ua101 *ua, struct ua101_stream *stream)
1048 {
1049 unsigned int remaining_packets, packets, packets_per_page, i;
1050 size_t size;
1051
1052 stream->queue_length = queue_length;
1053 stream->queue_length = max(stream->queue_length,
1054 (unsigned int)MIN_QUEUE_LENGTH);
1055 stream->queue_length = min(stream->queue_length,
1056 (unsigned int)MAX_QUEUE_LENGTH);
1057
1058 /*
1059 * The cache pool sizes used by usb_buffer_alloc() (128, 512, 2048) are
1060 * quite bad when used with the packet sizes of this device (e.g. 280,
1061 * 520, 624). Therefore, we allocate and subdivide entire pages, using
1062 * a smaller buffer only for the last chunk.
1063 */
1064 remaining_packets = stream->queue_length;
1065 packets_per_page = PAGE_SIZE / stream->max_packet_bytes;
1066 for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i) {
1067 packets = min(remaining_packets, packets_per_page);
1068 size = packets * stream->max_packet_bytes;
1069 stream->buffers[i].addr =
1070 usb_buffer_alloc(ua->dev, size, GFP_KERNEL,
1071 &stream->buffers[i].dma);
1072 if (!stream->buffers[i].addr)
1073 return -ENOMEM;
1074 stream->buffers[i].size = size;
1075 remaining_packets -= packets;
1076 if (!remaining_packets)
1077 break;
1078 }
1079 if (remaining_packets) {
1080 dev_err(&ua->dev->dev, "too many packets\n");
1081 return -ENXIO;
1082 }
1083 return 0;
1084 }
1085
1086 static void free_stream_buffers(struct ua101 *ua, struct ua101_stream *stream)
1087 {
1088 unsigned int i;
1089
1090 for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i)
1091 usb_buffer_free(ua->dev,
1092 stream->buffers[i].size,
1093 stream->buffers[i].addr,
1094 stream->buffers[i].dma);
1095 }
1096
1097 static int alloc_stream_urbs(struct ua101 *ua, struct ua101_stream *stream,
1098 void (*urb_complete)(struct urb *))
1099 {
1100 unsigned max_packet_size = stream->max_packet_bytes;
1101 struct ua101_urb *urb;
1102 unsigned int b, u = 0;
1103
1104 for (b = 0; b < ARRAY_SIZE(stream->buffers); ++b) {
1105 unsigned int size = stream->buffers[b].size;
1106 u8 *addr = stream->buffers[b].addr;
1107 dma_addr_t dma = stream->buffers[b].dma;
1108
1109 while (size >= max_packet_size) {
1110 if (u >= stream->queue_length)
1111 goto bufsize_error;
1112 urb = kmalloc(sizeof(*urb), GFP_KERNEL);
1113 if (!urb)
1114 return -ENOMEM;
1115 usb_init_urb(&urb->urb);
1116 urb->urb.dev = ua->dev;
1117 urb->urb.pipe = stream->usb_pipe;
1118 urb->urb.transfer_flags = URB_ISO_ASAP |
1119 URB_NO_TRANSFER_DMA_MAP;
1120 urb->urb.transfer_buffer = addr;
1121 urb->urb.transfer_dma = dma;
1122 urb->urb.transfer_buffer_length = max_packet_size;
1123 urb->urb.number_of_packets = 1;
1124 urb->urb.interval = 1;
1125 urb->urb.context = ua;
1126 urb->urb.complete = urb_complete;
1127 urb->urb.iso_frame_desc[0].offset = 0;
1128 urb->urb.iso_frame_desc[0].length = max_packet_size;
1129 stream->urbs[u++] = urb;
1130 size -= max_packet_size;
1131 addr += max_packet_size;
1132 dma += max_packet_size;
1133 }
1134 }
1135 if (u == stream->queue_length)
1136 return 0;
1137 bufsize_error:
1138 dev_err(&ua->dev->dev, "internal buffer size error\n");
1139 return -ENXIO;
1140 }
1141
1142 static void free_stream_urbs(struct ua101_stream *stream)
1143 {
1144 unsigned int i;
1145
1146 for (i = 0; i < stream->queue_length; ++i)
1147 kfree(stream->urbs[i]);
1148 }
1149
1150 static void free_usb_related_resources(struct ua101 *ua,
1151 struct usb_interface *interface)
1152 {
1153 unsigned int i;
1154
1155 free_stream_urbs(&ua->capture);
1156 free_stream_urbs(&ua->playback);
1157 free_stream_buffers(ua, &ua->capture);
1158 free_stream_buffers(ua, &ua->playback);
1159
1160 for (i = 0; i < ARRAY_SIZE(ua->intf); ++i)
1161 if (ua->intf[i]) {
1162 usb_set_intfdata(ua->intf[i], NULL);
1163 if (ua->intf[i] != interface)
1164 usb_driver_release_interface(&ua101_driver,
1165 ua->intf[i]);
1166 }
1167 }
1168
1169 static void ua101_card_free(struct snd_card *card)
1170 {
1171 struct ua101 *ua = card->private_data;
1172
1173 mutex_destroy(&ua->mutex);
1174 }
1175
1176 static int ua101_probe(struct usb_interface *interface,
1177 const struct usb_device_id *usb_id)
1178 {
1179 static const struct snd_usb_midi_endpoint_info midi_ep = {
1180 .out_cables = 0x0001,
1181 .in_cables = 0x0001
1182 };
1183 static const struct snd_usb_audio_quirk midi_quirk = {
1184 .type = QUIRK_MIDI_FIXED_ENDPOINT,
1185 .data = &midi_ep
1186 };
1187 static const int intf_numbers[2][3] = {
1188 { /* UA-101 */
1189 [INTF_PLAYBACK] = 0,
1190 [INTF_CAPTURE] = 1,
1191 [INTF_MIDI] = 2,
1192 },
1193 { /* UA-1000 */
1194 [INTF_CAPTURE] = 1,
1195 [INTF_PLAYBACK] = 2,
1196 [INTF_MIDI] = 3,
1197 },
1198 };
1199 struct snd_card *card;
1200 struct ua101 *ua;
1201 unsigned int card_index, i;
1202 int is_ua1000;
1203 const char *name;
1204 char usb_path[32];
1205 int err;
1206
1207 is_ua1000 = usb_id->idProduct == 0x0044;
1208
1209 if (interface->altsetting->desc.bInterfaceNumber !=
1210 intf_numbers[is_ua1000][0])
1211 return -ENODEV;
1212
1213 mutex_lock(&devices_mutex);
1214
1215 for (card_index = 0; card_index < SNDRV_CARDS; ++card_index)
1216 if (enable[card_index] && !(devices_used & (1 << card_index)))
1217 break;
1218 if (card_index >= SNDRV_CARDS) {
1219 mutex_unlock(&devices_mutex);
1220 return -ENOENT;
1221 }
1222 err = snd_card_create(index[card_index], id[card_index], THIS_MODULE,
1223 sizeof(*ua), &card);
1224 if (err < 0) {
1225 mutex_unlock(&devices_mutex);
1226 return err;
1227 }
1228 card->private_free = ua101_card_free;
1229 ua = card->private_data;
1230 ua->dev = interface_to_usbdev(interface);
1231 ua->card = card;
1232 ua->card_index = card_index;
1233 INIT_LIST_HEAD(&ua->midi_list);
1234 spin_lock_init(&ua->lock);
1235 mutex_init(&ua->mutex);
1236 INIT_LIST_HEAD(&ua->ready_playback_urbs);
1237 tasklet_init(&ua->playback_tasklet,
1238 playback_tasklet, (unsigned long)ua);
1239 init_waitqueue_head(&ua->alsa_capture_wait);
1240 init_waitqueue_head(&ua->rate_feedback_wait);
1241 init_waitqueue_head(&ua->alsa_playback_wait);
1242
1243 ua->intf[0] = interface;
1244 for (i = 1; i < ARRAY_SIZE(ua->intf); ++i) {
1245 ua->intf[i] = usb_ifnum_to_if(ua->dev,
1246 intf_numbers[is_ua1000][i]);
1247 if (!ua->intf[i]) {
1248 dev_err(&ua->dev->dev, "interface %u not found\n",
1249 intf_numbers[is_ua1000][i]);
1250 err = -ENXIO;
1251 goto probe_error;
1252 }
1253 err = usb_driver_claim_interface(&ua101_driver,
1254 ua->intf[i], ua);
1255 if (err < 0) {
1256 ua->intf[i] = NULL;
1257 err = -EBUSY;
1258 goto probe_error;
1259 }
1260 }
1261
1262 snd_card_set_dev(card, &interface->dev);
1263
1264 err = detect_usb_format(ua);
1265 if (err < 0)
1266 goto probe_error;
1267
1268 name = usb_id->idProduct == 0x0044 ? "UA-1000" : "UA-101";
1269 strcpy(card->driver, "UA-101");
1270 strcpy(card->shortname, name);
1271 usb_make_path(ua->dev, usb_path, sizeof(usb_path));
1272 snprintf(ua->card->longname, sizeof(ua->card->longname),
1273 "EDIROL %s (serial %s), %u Hz at %s, %s speed", name,
1274 ua->dev->serial ? ua->dev->serial : "?", ua->rate, usb_path,
1275 ua->dev->speed == USB_SPEED_HIGH ? "high" : "full");
1276
1277 err = alloc_stream_buffers(ua, &ua->capture);
1278 if (err < 0)
1279 goto probe_error;
1280 err = alloc_stream_buffers(ua, &ua->playback);
1281 if (err < 0)
1282 goto probe_error;
1283
1284 err = alloc_stream_urbs(ua, &ua->capture, capture_urb_complete);
1285 if (err < 0)
1286 goto probe_error;
1287 err = alloc_stream_urbs(ua, &ua->playback, playback_urb_complete);
1288 if (err < 0)
1289 goto probe_error;
1290
1291 err = snd_pcm_new(card, name, 0, 1, 1, &ua->pcm);
1292 if (err < 0)
1293 goto probe_error;
1294 ua->pcm->private_data = ua;
1295 strcpy(ua->pcm->name, name);
1296 snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_pcm_ops);
1297 snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_pcm_ops);
1298
1299 err = snd_usbmidi_create(card, ua->intf[INTF_MIDI],
1300 &ua->midi_list, &midi_quirk);
1301 if (err < 0)
1302 goto probe_error;
1303
1304 err = snd_card_register(card);
1305 if (err < 0)
1306 goto probe_error;
1307
1308 usb_set_intfdata(interface, ua);
1309 devices_used |= 1 << card_index;
1310
1311 mutex_unlock(&devices_mutex);
1312 return 0;
1313
1314 probe_error:
1315 free_usb_related_resources(ua, interface);
1316 snd_card_free(card);
1317 mutex_unlock(&devices_mutex);
1318 return err;
1319 }
1320
1321 static void ua101_disconnect(struct usb_interface *interface)
1322 {
1323 struct ua101 *ua = usb_get_intfdata(interface);
1324 struct list_head *midi;
1325
1326 if (!ua)
1327 return;
1328
1329 mutex_lock(&devices_mutex);
1330
1331 set_bit(DISCONNECTED, &ua->states);
1332 wake_up(&ua->rate_feedback_wait);
1333
1334 /* make sure that userspace cannot create new requests */
1335 snd_card_disconnect(ua->card);
1336
1337 /* make sure that there are no pending USB requests */
1338 __list_for_each(midi, &ua->midi_list)
1339 snd_usbmidi_disconnect(midi);
1340 abort_alsa_playback(ua);
1341 abort_alsa_capture(ua);
1342 mutex_lock(&ua->mutex);
1343 stop_usb_playback(ua);
1344 stop_usb_capture(ua);
1345 mutex_unlock(&ua->mutex);
1346
1347 free_usb_related_resources(ua, interface);
1348
1349 devices_used &= ~(1 << ua->card_index);
1350
1351 snd_card_free_when_closed(ua->card);
1352
1353 mutex_unlock(&devices_mutex);
1354 }
1355
1356 static struct usb_device_id ua101_ids[] = {
1357 { USB_DEVICE(0x0582, 0x0044) }, /* UA-1000 high speed */
1358 { USB_DEVICE(0x0582, 0x007d) }, /* UA-101 high speed */
1359 { USB_DEVICE(0x0582, 0x008d) }, /* UA-101 full speed */
1360 { }
1361 };
1362 MODULE_DEVICE_TABLE(usb, ua101_ids);
1363
1364 static struct usb_driver ua101_driver = {
1365 .name = "snd-ua101",
1366 .id_table = ua101_ids,
1367 .probe = ua101_probe,
1368 .disconnect = ua101_disconnect,
1369 #if 0
1370 .suspend = ua101_suspend,
1371 .resume = ua101_resume,
1372 #endif
1373 };
1374
1375 static int __init alsa_card_ua101_init(void)
1376 {
1377 return usb_register(&ua101_driver);
1378 }
1379
1380 static void __exit alsa_card_ua101_exit(void)
1381 {
1382 usb_deregister(&ua101_driver);
1383 mutex_destroy(&devices_mutex);
1384 }
1385
1386 module_init(alsa_card_ua101_init);
1387 module_exit(alsa_card_ua101_exit);
Linux ARM platform port for MOXA ART SoC