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arm64: dts: allwinner: a64: pinetab: Fix cpvdd supply name
[linux/fpc-iii.git] / sound / usb / misc / ua101.c
blob884e740a785c55af2157ac97cb47ee83e884e39e
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Edirol UA-101/UA-1000 driver
4 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5 */
6
7 #include <linux/init.h>
8 #include <linux/module.h>
9 #include <linux/slab.h>
10 #include <linux/usb.h>
11 #include <linux/usb/audio.h>
12 #include <sound/core.h>
13 #include <sound/initval.h>
14 #include <sound/pcm.h>
15 #include <sound/pcm_params.h>
16 #include "../usbaudio.h"
17 #include "../midi.h"
18
19 MODULE_DESCRIPTION("Edirol UA-101/1000 driver");
20 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
21 MODULE_LICENSE("GPL v2");
22 MODULE_SUPPORTED_DEVICE("{{Edirol,UA-101},{Edirol,UA-1000}}");
23
24 /*
25 * Should not be lower than the minimum scheduling delay of the host
26 * controller. Some Intel controllers need more than one frame; as long as
27 * that driver doesn't tell us about this, use 1.5 frames just to be sure.
28 */
29 #define MIN_QUEUE_LENGTH 12
30 /* Somewhat random. */
31 #define MAX_QUEUE_LENGTH 30
32 /*
33 * This magic value optimizes memory usage efficiency for the UA-101's packet
34 * sizes at all sample rates, taking into account the stupid cache pool sizes
35 * that usb_alloc_coherent() uses.
36 */
37 #define DEFAULT_QUEUE_LENGTH 21
38
39 #define MAX_PACKET_SIZE 672 /* hardware specific */
40 #define MAX_MEMORY_BUFFERS DIV_ROUND_UP(MAX_QUEUE_LENGTH, \
41 PAGE_SIZE / MAX_PACKET_SIZE)
42
43 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
44 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
45 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
46 static unsigned int queue_length = 21;
47
48 module_param_array(index, int, NULL, 0444);
49 MODULE_PARM_DESC(index, "card index");
50 module_param_array(id, charp, NULL, 0444);
51 MODULE_PARM_DESC(id, "ID string");
52 module_param_array(enable, bool, NULL, 0444);
53 MODULE_PARM_DESC(enable, "enable card");
54 module_param(queue_length, uint, 0644);
55 MODULE_PARM_DESC(queue_length, "USB queue length in microframes, "
56 __stringify(MIN_QUEUE_LENGTH)"-"__stringify(MAX_QUEUE_LENGTH));
57
58 enum {
59 INTF_PLAYBACK,
60 INTF_CAPTURE,
61 INTF_MIDI,
62
63 INTF_COUNT
64 };
65
66 /* bits in struct ua101::states */
67 enum {
68 USB_CAPTURE_RUNNING,
69 USB_PLAYBACK_RUNNING,
70 ALSA_CAPTURE_OPEN,
71 ALSA_PLAYBACK_OPEN,
72 ALSA_CAPTURE_RUNNING,
73 ALSA_PLAYBACK_RUNNING,
74 CAPTURE_URB_COMPLETED,
75 PLAYBACK_URB_COMPLETED,
76 DISCONNECTED,
77 };
78
79 struct ua101 {
80 struct usb_device *dev;
81 struct snd_card *card;
82 struct usb_interface *intf[INTF_COUNT];
83 int card_index;
84 struct snd_pcm *pcm;
85 struct list_head midi_list;
86 u64 format_bit;
87 unsigned int rate;
88 unsigned int packets_per_second;
89 spinlock_t lock;
90 struct mutex mutex;
91 unsigned long states;
92
93 /* FIFO to synchronize playback rate to capture rate */
94 unsigned int rate_feedback_start;
95 unsigned int rate_feedback_count;
96 u8 rate_feedback[MAX_QUEUE_LENGTH];
97
98 struct list_head ready_playback_urbs;
99 struct tasklet_struct playback_tasklet;
100 wait_queue_head_t alsa_capture_wait;
101 wait_queue_head_t rate_feedback_wait;
102 wait_queue_head_t alsa_playback_wait;
103 struct ua101_stream {
104 struct snd_pcm_substream *substream;
105 unsigned int usb_pipe;
106 unsigned int channels;
107 unsigned int frame_bytes;
108 unsigned int max_packet_bytes;
109 unsigned int period_pos;
110 unsigned int buffer_pos;
111 unsigned int queue_length;
112 struct ua101_urb {
113 struct urb urb;
114 struct usb_iso_packet_descriptor iso_frame_desc[1];
115 struct list_head ready_list;
116 } *urbs[MAX_QUEUE_LENGTH];
117 struct {
118 unsigned int size;
119 void *addr;
120 dma_addr_t dma;
121 } buffers[MAX_MEMORY_BUFFERS];
122 } capture, playback;
123 };
124
125 static DEFINE_MUTEX(devices_mutex);
126 static unsigned int devices_used;
127 static struct usb_driver ua101_driver;
128
129 static void abort_alsa_playback(struct ua101 *ua);
130 static void abort_alsa_capture(struct ua101 *ua);
131
132 static const char *usb_error_string(int err)
133 {
134 switch (err) {
135 case -ENODEV:
136 return "no device";
137 case -ENOENT:
138 return "endpoint not enabled";
139 case -EPIPE:
140 return "endpoint stalled";
141 case -ENOSPC:
142 return "not enough bandwidth";
143 case -ESHUTDOWN:
144 return "device disabled";
145 case -EHOSTUNREACH:
146 return "device suspended";
147 case -EINVAL:
148 case -EAGAIN:
149 case -EFBIG:
150 case -EMSGSIZE:
151 return "internal error";
152 default:
153 return "unknown error";
154 }
155 }
156
157 static void abort_usb_capture(struct ua101 *ua)
158 {
159 if (test_and_clear_bit(USB_CAPTURE_RUNNING, &ua->states)) {
160 wake_up(&ua->alsa_capture_wait);
161 wake_up(&ua->rate_feedback_wait);
162 }
163 }
164
165 static void abort_usb_playback(struct ua101 *ua)
166 {
167 if (test_and_clear_bit(USB_PLAYBACK_RUNNING, &ua->states))
168 wake_up(&ua->alsa_playback_wait);
169 }
170
171 static void playback_urb_complete(struct urb *usb_urb)
172 {
173 struct ua101_urb *urb = (struct ua101_urb *)usb_urb;
174 struct ua101 *ua = urb->urb.context;
175 unsigned long flags;
176
177 if (unlikely(urb->urb.status == -ENOENT || /* unlinked */
178 urb->urb.status == -ENODEV || /* device removed */
179 urb->urb.status == -ECONNRESET || /* unlinked */
180 urb->urb.status == -ESHUTDOWN)) { /* device disabled */
181 abort_usb_playback(ua);
182 abort_alsa_playback(ua);
183 return;
184 }
185
186 if (test_bit(USB_PLAYBACK_RUNNING, &ua->states)) {
187 /* append URB to FIFO */
188 spin_lock_irqsave(&ua->lock, flags);
189 list_add_tail(&urb->ready_list, &ua->ready_playback_urbs);
190 if (ua->rate_feedback_count > 0)
191 tasklet_schedule(&ua->playback_tasklet);
192 ua->playback.substream->runtime->delay -=
193 urb->urb.iso_frame_desc[0].length /
194 ua->playback.frame_bytes;
195 spin_unlock_irqrestore(&ua->lock, flags);
196 }
197 }
198
199 static void first_playback_urb_complete(struct urb *urb)
200 {
201 struct ua101 *ua = urb->context;
202
203 urb->complete = playback_urb_complete;
204 playback_urb_complete(urb);
205
206 set_bit(PLAYBACK_URB_COMPLETED, &ua->states);
207 wake_up(&ua->alsa_playback_wait);
208 }
209
210 /* copy data from the ALSA ring buffer into the URB buffer */
211 static bool copy_playback_data(struct ua101_stream *stream, struct urb *urb,
212 unsigned int frames)
213 {
214 struct snd_pcm_runtime *runtime;
215 unsigned int frame_bytes, frames1;
216 const u8 *source;
217
218 runtime = stream->substream->runtime;
219 frame_bytes = stream->frame_bytes;
220 source = runtime->dma_area + stream->buffer_pos * frame_bytes;
221 if (stream->buffer_pos + frames <= runtime->buffer_size) {
222 memcpy(urb->transfer_buffer, source, frames * frame_bytes);
223 } else {
224 /* wrap around at end of ring buffer */
225 frames1 = runtime->buffer_size - stream->buffer_pos;
226 memcpy(urb->transfer_buffer, source, frames1 * frame_bytes);
227 memcpy(urb->transfer_buffer + frames1 * frame_bytes,
228 runtime->dma_area, (frames - frames1) * frame_bytes);
229 }
230
231 stream->buffer_pos += frames;
232 if (stream->buffer_pos >= runtime->buffer_size)
233 stream->buffer_pos -= runtime->buffer_size;
234 stream->period_pos += frames;
235 if (stream->period_pos >= runtime->period_size) {
236 stream->period_pos -= runtime->period_size;
237 return true;
238 }
239 return false;
240 }
241
242 static inline void add_with_wraparound(struct ua101 *ua,
243 unsigned int *value, unsigned int add)
244 {
245 *value += add;
246 if (*value >= ua->playback.queue_length)
247 *value -= ua->playback.queue_length;
248 }
249
250 static void playback_tasklet(unsigned long data)
251 {
252 struct ua101 *ua = (void *)data;
253 unsigned long flags;
254 unsigned int frames;
255 struct ua101_urb *urb;
256 bool do_period_elapsed = false;
257 int err;
258
259 if (unlikely(!test_bit(USB_PLAYBACK_RUNNING, &ua->states)))
260 return;
261
262 /*
263 * Synchronizing the playback rate to the capture rate is done by using
264 * the same sequence of packet sizes for both streams.
265 * Submitting a playback URB therefore requires both a ready URB and
266 * the size of the corresponding capture packet, i.e., both playback
267 * and capture URBs must have been completed. Since the USB core does
268 * not guarantee that playback and capture complete callbacks are
269 * called alternately, we use two FIFOs for packet sizes and read URBs;
270 * submitting playback URBs is possible as long as both FIFOs are
271 * nonempty.
272 */
273 spin_lock_irqsave(&ua->lock, flags);
274 while (ua->rate_feedback_count > 0 &&
275 !list_empty(&ua->ready_playback_urbs)) {
276 /* take packet size out of FIFO */
277 frames = ua->rate_feedback[ua->rate_feedback_start];
278 add_with_wraparound(ua, &ua->rate_feedback_start, 1);
279 ua->rate_feedback_count--;
280
281 /* take URB out of FIFO */
282 urb = list_first_entry(&ua->ready_playback_urbs,
283 struct ua101_urb, ready_list);
284 list_del(&urb->ready_list);
285
286 /* fill packet with data or silence */
287 urb->urb.iso_frame_desc[0].length =
288 frames * ua->playback.frame_bytes;
289 if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states))
290 do_period_elapsed |= copy_playback_data(&ua->playback,
291 &urb->urb,
292 frames);
293 else
294 memset(urb->urb.transfer_buffer, 0,
295 urb->urb.iso_frame_desc[0].length);
296
297 /* and off you go ... */
298 err = usb_submit_urb(&urb->urb, GFP_ATOMIC);
299 if (unlikely(err < 0)) {
300 spin_unlock_irqrestore(&ua->lock, flags);
301 abort_usb_playback(ua);
302 abort_alsa_playback(ua);
303 dev_err(&ua->dev->dev, "USB request error %d: %s\n",
304 err, usb_error_string(err));
305 return;
306 }
307 ua->playback.substream->runtime->delay += frames;
308 }
309 spin_unlock_irqrestore(&ua->lock, flags);
310 if (do_period_elapsed)
311 snd_pcm_period_elapsed(ua->playback.substream);
312 }
313
314 /* copy data from the URB buffer into the ALSA ring buffer */
315 static bool copy_capture_data(struct ua101_stream *stream, struct urb *urb,
316 unsigned int frames)
317 {
318 struct snd_pcm_runtime *runtime;
319 unsigned int frame_bytes, frames1;
320 u8 *dest;
321
322 runtime = stream->substream->runtime;
323 frame_bytes = stream->frame_bytes;
324 dest = runtime->dma_area + stream->buffer_pos * frame_bytes;
325 if (stream->buffer_pos + frames <= runtime->buffer_size) {
326 memcpy(dest, urb->transfer_buffer, frames * frame_bytes);
327 } else {
328 /* wrap around at end of ring buffer */
329 frames1 = runtime->buffer_size - stream->buffer_pos;
330 memcpy(dest, urb->transfer_buffer, frames1 * frame_bytes);
331 memcpy(runtime->dma_area,
332 urb->transfer_buffer + frames1 * frame_bytes,
333 (frames - frames1) * frame_bytes);
334 }
335
336 stream->buffer_pos += frames;
337 if (stream->buffer_pos >= runtime->buffer_size)
338 stream->buffer_pos -= runtime->buffer_size;
339 stream->period_pos += frames;
340 if (stream->period_pos >= runtime->period_size) {
341 stream->period_pos -= runtime->period_size;
342 return true;
343 }
344 return false;
345 }
346
347 static void capture_urb_complete(struct urb *urb)
348 {
349 struct ua101 *ua = urb->context;
350 struct ua101_stream *stream = &ua->capture;
351 unsigned long flags;
352 unsigned int frames, write_ptr;
353 bool do_period_elapsed;
354 int err;
355
356 if (unlikely(urb->status == -ENOENT || /* unlinked */
357 urb->status == -ENODEV || /* device removed */
358 urb->status == -ECONNRESET || /* unlinked */
359 urb->status == -ESHUTDOWN)) /* device disabled */
360 goto stream_stopped;
361
362 if (urb->status >= 0 && urb->iso_frame_desc[0].status >= 0)
363 frames = urb->iso_frame_desc[0].actual_length /
364 stream->frame_bytes;
365 else
366 frames = 0;
367
368 spin_lock_irqsave(&ua->lock, flags);
369
370 if (frames > 0 && test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
371 do_period_elapsed = copy_capture_data(stream, urb, frames);
372 else
373 do_period_elapsed = false;
374
375 if (test_bit(USB_CAPTURE_RUNNING, &ua->states)) {
376 err = usb_submit_urb(urb, GFP_ATOMIC);
377 if (unlikely(err < 0)) {
378 spin_unlock_irqrestore(&ua->lock, flags);
379 dev_err(&ua->dev->dev, "USB request error %d: %s\n",
380 err, usb_error_string(err));
381 goto stream_stopped;
382 }
383
384 /* append packet size to FIFO */
385 write_ptr = ua->rate_feedback_start;
386 add_with_wraparound(ua, &write_ptr, ua->rate_feedback_count);
387 ua->rate_feedback[write_ptr] = frames;
388 if (ua->rate_feedback_count < ua->playback.queue_length) {
389 ua->rate_feedback_count++;
390 if (ua->rate_feedback_count ==
391 ua->playback.queue_length)
392 wake_up(&ua->rate_feedback_wait);
393 } else {
394 /*
395 * Ring buffer overflow; this happens when the playback
396 * stream is not running. Throw away the oldest entry,
397 * so that the playback stream, when it starts, sees
398 * the most recent packet sizes.
399 */
400 add_with_wraparound(ua, &ua->rate_feedback_start, 1);
401 }
402 if (test_bit(USB_PLAYBACK_RUNNING, &ua->states) &&
403 !list_empty(&ua->ready_playback_urbs))
404 tasklet_schedule(&ua->playback_tasklet);
405 }
406
407 spin_unlock_irqrestore(&ua->lock, flags);
408
409 if (do_period_elapsed)
410 snd_pcm_period_elapsed(stream->substream);
411
412 return;
413
414 stream_stopped:
415 abort_usb_playback(ua);
416 abort_usb_capture(ua);
417 abort_alsa_playback(ua);
418 abort_alsa_capture(ua);
419 }
420
421 static void first_capture_urb_complete(struct urb *urb)
422 {
423 struct ua101 *ua = urb->context;
424
425 urb->complete = capture_urb_complete;
426 capture_urb_complete(urb);
427
428 set_bit(CAPTURE_URB_COMPLETED, &ua->states);
429 wake_up(&ua->alsa_capture_wait);
430 }
431
432 static int submit_stream_urbs(struct ua101 *ua, struct ua101_stream *stream)
433 {
434 unsigned int i;
435
436 for (i = 0; i < stream->queue_length; ++i) {
437 int err = usb_submit_urb(&stream->urbs[i]->urb, GFP_KERNEL);
438 if (err < 0) {
439 dev_err(&ua->dev->dev, "USB request error %d: %s\n",
440 err, usb_error_string(err));
441 return err;
442 }
443 }
444 return 0;
445 }
446
447 static void kill_stream_urbs(struct ua101_stream *stream)
448 {
449 unsigned int i;
450
451 for (i = 0; i < stream->queue_length; ++i)
452 if (stream->urbs[i])
453 usb_kill_urb(&stream->urbs[i]->urb);
454 }
455
456 static int enable_iso_interface(struct ua101 *ua, unsigned int intf_index)
457 {
458 struct usb_host_interface *alts;
459
460 alts = ua->intf[intf_index]->cur_altsetting;
461 if (alts->desc.bAlternateSetting != 1) {
462 int err = usb_set_interface(ua->dev,
463 alts->desc.bInterfaceNumber, 1);
464 if (err < 0) {
465 dev_err(&ua->dev->dev,
466 "cannot initialize interface; error %d: %s\n",
467 err, usb_error_string(err));
468 return err;
469 }
470 }
471 return 0;
472 }
473
474 static void disable_iso_interface(struct ua101 *ua, unsigned int intf_index)
475 {
476 struct usb_host_interface *alts;
477
478 if (!ua->intf[intf_index])
479 return;
480
481 alts = ua->intf[intf_index]->cur_altsetting;
482 if (alts->desc.bAlternateSetting != 0) {
483 int err = usb_set_interface(ua->dev,
484 alts->desc.bInterfaceNumber, 0);
485 if (err < 0 && !test_bit(DISCONNECTED, &ua->states))
486 dev_warn(&ua->dev->dev,
487 "interface reset failed; error %d: %s\n",
488 err, usb_error_string(err));
489 }
490 }
491
492 static void stop_usb_capture(struct ua101 *ua)
493 {
494 clear_bit(USB_CAPTURE_RUNNING, &ua->states);
495
496 kill_stream_urbs(&ua->capture);
497
498 disable_iso_interface(ua, INTF_CAPTURE);
499 }
500
501 static int start_usb_capture(struct ua101 *ua)
502 {
503 int err;
504
505 if (test_bit(DISCONNECTED, &ua->states))
506 return -ENODEV;
507
508 if (test_bit(USB_CAPTURE_RUNNING, &ua->states))
509 return 0;
510
511 kill_stream_urbs(&ua->capture);
512
513 err = enable_iso_interface(ua, INTF_CAPTURE);
514 if (err < 0)
515 return err;
516
517 clear_bit(CAPTURE_URB_COMPLETED, &ua->states);
518 ua->capture.urbs[0]->urb.complete = first_capture_urb_complete;
519 ua->rate_feedback_start = 0;
520 ua->rate_feedback_count = 0;
521
522 set_bit(USB_CAPTURE_RUNNING, &ua->states);
523 err = submit_stream_urbs(ua, &ua->capture);
524 if (err < 0)
525 stop_usb_capture(ua);
526 return err;
527 }
528
529 static void stop_usb_playback(struct ua101 *ua)
530 {
531 clear_bit(USB_PLAYBACK_RUNNING, &ua->states);
532
533 kill_stream_urbs(&ua->playback);
534
535 tasklet_kill(&ua->playback_tasklet);
536
537 disable_iso_interface(ua, INTF_PLAYBACK);
538 }
539
540 static int start_usb_playback(struct ua101 *ua)
541 {
542 unsigned int i, frames;
543 struct urb *urb;
544 int err = 0;
545
546 if (test_bit(DISCONNECTED, &ua->states))
547 return -ENODEV;
548
549 if (test_bit(USB_PLAYBACK_RUNNING, &ua->states))
550 return 0;
551
552 kill_stream_urbs(&ua->playback);
553 tasklet_kill(&ua->playback_tasklet);
554
555 err = enable_iso_interface(ua, INTF_PLAYBACK);
556 if (err < 0)
557 return err;
558
559 clear_bit(PLAYBACK_URB_COMPLETED, &ua->states);
560 ua->playback.urbs[0]->urb.complete =
561 first_playback_urb_complete;
562 spin_lock_irq(&ua->lock);
563 INIT_LIST_HEAD(&ua->ready_playback_urbs);
564 spin_unlock_irq(&ua->lock);
565
566 /*
567 * We submit the initial URBs all at once, so we have to wait for the
568 * packet size FIFO to be full.
569 */
570 wait_event(ua->rate_feedback_wait,
571 ua->rate_feedback_count >= ua->playback.queue_length ||
572 !test_bit(USB_CAPTURE_RUNNING, &ua->states) ||
573 test_bit(DISCONNECTED, &ua->states));
574 if (test_bit(DISCONNECTED, &ua->states)) {
575 stop_usb_playback(ua);
576 return -ENODEV;
577 }
578 if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) {
579 stop_usb_playback(ua);
580 return -EIO;
581 }
582
583 for (i = 0; i < ua->playback.queue_length; ++i) {
584 /* all initial URBs contain silence */
585 spin_lock_irq(&ua->lock);
586 frames = ua->rate_feedback[ua->rate_feedback_start];
587 add_with_wraparound(ua, &ua->rate_feedback_start, 1);
588 ua->rate_feedback_count--;
589 spin_unlock_irq(&ua->lock);
590 urb = &ua->playback.urbs[i]->urb;
591 urb->iso_frame_desc[0].length =
592 frames * ua->playback.frame_bytes;
593 memset(urb->transfer_buffer, 0,
594 urb->iso_frame_desc[0].length);
595 }
596
597 set_bit(USB_PLAYBACK_RUNNING, &ua->states);
598 err = submit_stream_urbs(ua, &ua->playback);
599 if (err < 0)
600 stop_usb_playback(ua);
601 return err;
602 }
603
604 static void abort_alsa_capture(struct ua101 *ua)
605 {
606 if (test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
607 snd_pcm_stop_xrun(ua->capture.substream);
608 }
609
610 static void abort_alsa_playback(struct ua101 *ua)
611 {
612 if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states))
613 snd_pcm_stop_xrun(ua->playback.substream);
614 }
615
616 static int set_stream_hw(struct ua101 *ua, struct snd_pcm_substream *substream,
617 unsigned int channels)
618 {
619 int err;
620
621 substream->runtime->hw.info =
622 SNDRV_PCM_INFO_MMAP |
623 SNDRV_PCM_INFO_MMAP_VALID |
624 SNDRV_PCM_INFO_BATCH |
625 SNDRV_PCM_INFO_INTERLEAVED |
626 SNDRV_PCM_INFO_BLOCK_TRANSFER |
627 SNDRV_PCM_INFO_FIFO_IN_FRAMES;
628 substream->runtime->hw.formats = ua->format_bit;
629 substream->runtime->hw.rates = snd_pcm_rate_to_rate_bit(ua->rate);
630 substream->runtime->hw.rate_min = ua->rate;
631 substream->runtime->hw.rate_max = ua->rate;
632 substream->runtime->hw.channels_min = channels;
633 substream->runtime->hw.channels_max = channels;
634 substream->runtime->hw.buffer_bytes_max = 45000 * 1024;
635 substream->runtime->hw.period_bytes_min = 1;
636 substream->runtime->hw.period_bytes_max = UINT_MAX;
637 substream->runtime->hw.periods_min = 2;
638 substream->runtime->hw.periods_max = UINT_MAX;
639 err = snd_pcm_hw_constraint_minmax(substream->runtime,
640 SNDRV_PCM_HW_PARAM_PERIOD_TIME,
641 1500000 / ua->packets_per_second,
642 UINT_MAX);
643 if (err < 0)
644 return err;
645 err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
646 return err;
647 }
648
649 static int capture_pcm_open(struct snd_pcm_substream *substream)
650 {
651 struct ua101 *ua = substream->private_data;
652 int err;
653
654 ua->capture.substream = substream;
655 err = set_stream_hw(ua, substream, ua->capture.channels);
656 if (err < 0)
657 return err;
658 substream->runtime->hw.fifo_size =
659 DIV_ROUND_CLOSEST(ua->rate, ua->packets_per_second);
660 substream->runtime->delay = substream->runtime->hw.fifo_size;
661
662 mutex_lock(&ua->mutex);
663 err = start_usb_capture(ua);
664 if (err >= 0)
665 set_bit(ALSA_CAPTURE_OPEN, &ua->states);
666 mutex_unlock(&ua->mutex);
667 return err;
668 }
669
670 static int playback_pcm_open(struct snd_pcm_substream *substream)
671 {
672 struct ua101 *ua = substream->private_data;
673 int err;
674
675 ua->playback.substream = substream;
676 err = set_stream_hw(ua, substream, ua->playback.channels);
677 if (err < 0)
678 return err;
679 substream->runtime->hw.fifo_size =
680 DIV_ROUND_CLOSEST(ua->rate * ua->playback.queue_length,
681 ua->packets_per_second);
682
683 mutex_lock(&ua->mutex);
684 err = start_usb_capture(ua);
685 if (err < 0)
686 goto error;
687 err = start_usb_playback(ua);
688 if (err < 0) {
689 if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states))
690 stop_usb_capture(ua);
691 goto error;
692 }
693 set_bit(ALSA_PLAYBACK_OPEN, &ua->states);
694 error:
695 mutex_unlock(&ua->mutex);
696 return err;
697 }
698
699 static int capture_pcm_close(struct snd_pcm_substream *substream)
700 {
701 struct ua101 *ua = substream->private_data;
702
703 mutex_lock(&ua->mutex);
704 clear_bit(ALSA_CAPTURE_OPEN, &ua->states);
705 if (!test_bit(ALSA_PLAYBACK_OPEN, &ua->states))
706 stop_usb_capture(ua);
707 mutex_unlock(&ua->mutex);
708 return 0;
709 }
710
711 static int playback_pcm_close(struct snd_pcm_substream *substream)
712 {
713 struct ua101 *ua = substream->private_data;
714
715 mutex_lock(&ua->mutex);
716 stop_usb_playback(ua);
717 clear_bit(ALSA_PLAYBACK_OPEN, &ua->states);
718 if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states))
719 stop_usb_capture(ua);
720 mutex_unlock(&ua->mutex);
721 return 0;
722 }
723
724 static int capture_pcm_hw_params(struct snd_pcm_substream *substream,
725 struct snd_pcm_hw_params *hw_params)
726 {
727 struct ua101 *ua = substream->private_data;
728 int err;
729
730 mutex_lock(&ua->mutex);
731 err = start_usb_capture(ua);
732 mutex_unlock(&ua->mutex);
733 return err;
734 }
735
736 static int playback_pcm_hw_params(struct snd_pcm_substream *substream,
737 struct snd_pcm_hw_params *hw_params)
738 {
739 struct ua101 *ua = substream->private_data;
740 int err;
741
742 mutex_lock(&ua->mutex);
743 err = start_usb_capture(ua);
744 if (err >= 0)
745 err = start_usb_playback(ua);
746 mutex_unlock(&ua->mutex);
747 return err;
748 }
749
750 static int capture_pcm_prepare(struct snd_pcm_substream *substream)
751 {
752 struct ua101 *ua = substream->private_data;
753 int err;
754
755 mutex_lock(&ua->mutex);
756 err = start_usb_capture(ua);
757 mutex_unlock(&ua->mutex);
758 if (err < 0)
759 return err;
760
761 /*
762 * The EHCI driver schedules the first packet of an iso stream at 10 ms
763 * in the future, i.e., no data is actually captured for that long.
764 * Take the wait here so that the stream is known to be actually
765 * running when the start trigger has been called.
766 */
767 wait_event(ua->alsa_capture_wait,
768 test_bit(CAPTURE_URB_COMPLETED, &ua->states) ||
769 !test_bit(USB_CAPTURE_RUNNING, &ua->states));
770 if (test_bit(DISCONNECTED, &ua->states))
771 return -ENODEV;
772 if (!test_bit(USB_CAPTURE_RUNNING, &ua->states))
773 return -EIO;
774
775 ua->capture.period_pos = 0;
776 ua->capture.buffer_pos = 0;
777 return 0;
778 }
779
780 static int playback_pcm_prepare(struct snd_pcm_substream *substream)
781 {
782 struct ua101 *ua = substream->private_data;
783 int err;
784
785 mutex_lock(&ua->mutex);
786 err = start_usb_capture(ua);
787 if (err >= 0)
788 err = start_usb_playback(ua);
789 mutex_unlock(&ua->mutex);
790 if (err < 0)
791 return err;
792
793 /* see the comment in capture_pcm_prepare() */
794 wait_event(ua->alsa_playback_wait,
795 test_bit(PLAYBACK_URB_COMPLETED, &ua->states) ||
796 !test_bit(USB_PLAYBACK_RUNNING, &ua->states));
797 if (test_bit(DISCONNECTED, &ua->states))
798 return -ENODEV;
799 if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states))
800 return -EIO;
801
802 substream->runtime->delay = 0;
803 ua->playback.period_pos = 0;
804 ua->playback.buffer_pos = 0;
805 return 0;
806 }
807
808 static int capture_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
809 {
810 struct ua101 *ua = substream->private_data;
811
812 switch (cmd) {
813 case SNDRV_PCM_TRIGGER_START:
814 if (!test_bit(USB_CAPTURE_RUNNING, &ua->states))
815 return -EIO;
816 set_bit(ALSA_CAPTURE_RUNNING, &ua->states);
817 return 0;
818 case SNDRV_PCM_TRIGGER_STOP:
819 clear_bit(ALSA_CAPTURE_RUNNING, &ua->states);
820 return 0;
821 default:
822 return -EINVAL;
823 }
824 }
825
826 static int playback_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_PLAYBACK_RUNNING, &ua->states))
833 return -EIO;
834 set_bit(ALSA_PLAYBACK_RUNNING, &ua->states);
835 return 0;
836 case SNDRV_PCM_TRIGGER_STOP:
837 clear_bit(ALSA_PLAYBACK_RUNNING, &ua->states);
838 return 0;
839 default:
840 return -EINVAL;
841 }
842 }
843
844 static inline snd_pcm_uframes_t ua101_pcm_pointer(struct ua101 *ua,
845 struct ua101_stream *stream)
846 {
847 unsigned long flags;
848 unsigned int pos;
849
850 spin_lock_irqsave(&ua->lock, flags);
851 pos = stream->buffer_pos;
852 spin_unlock_irqrestore(&ua->lock, flags);
853 return pos;
854 }
855
856 static snd_pcm_uframes_t capture_pcm_pointer(struct snd_pcm_substream *subs)
857 {
858 struct ua101 *ua = subs->private_data;
859
860 return ua101_pcm_pointer(ua, &ua->capture);
861 }
862
863 static snd_pcm_uframes_t playback_pcm_pointer(struct snd_pcm_substream *subs)
864 {
865 struct ua101 *ua = subs->private_data;
866
867 return ua101_pcm_pointer(ua, &ua->playback);
868 }
869
870 static const struct snd_pcm_ops capture_pcm_ops = {
871 .open = capture_pcm_open,
872 .close = capture_pcm_close,
873 .hw_params = capture_pcm_hw_params,
874 .prepare = capture_pcm_prepare,
875 .trigger = capture_pcm_trigger,
876 .pointer = capture_pcm_pointer,
877 };
878
879 static const struct snd_pcm_ops playback_pcm_ops = {
880 .open = playback_pcm_open,
881 .close = playback_pcm_close,
882 .hw_params = playback_pcm_hw_params,
883 .prepare = playback_pcm_prepare,
884 .trigger = playback_pcm_trigger,
885 .pointer = playback_pcm_pointer,
886 };
887
888 static const struct uac_format_type_i_discrete_descriptor *
889 find_format_descriptor(struct usb_interface *interface)
890 {
891 struct usb_host_interface *alt;
892 u8 *extra;
893 int extralen;
894
895 if (interface->num_altsetting != 2) {
896 dev_err(&interface->dev, "invalid num_altsetting\n");
897 return NULL;
898 }
899
900 alt = &interface->altsetting[0];
901 if (alt->desc.bNumEndpoints != 0) {
902 dev_err(&interface->dev, "invalid bNumEndpoints\n");
903 return NULL;
904 }
905
906 alt = &interface->altsetting[1];
907 if (alt->desc.bNumEndpoints != 1) {
908 dev_err(&interface->dev, "invalid bNumEndpoints\n");
909 return NULL;
910 }
911
912 extra = alt->extra;
913 extralen = alt->extralen;
914 while (extralen >= sizeof(struct usb_descriptor_header)) {
915 struct uac_format_type_i_discrete_descriptor *desc;
916
917 desc = (struct uac_format_type_i_discrete_descriptor *)extra;
918 if (desc->bLength > extralen) {
919 dev_err(&interface->dev, "descriptor overflow\n");
920 return NULL;
921 }
922 if (desc->bLength == UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1) &&
923 desc->bDescriptorType == USB_DT_CS_INTERFACE &&
924 desc->bDescriptorSubtype == UAC_FORMAT_TYPE) {
925 if (desc->bFormatType != UAC_FORMAT_TYPE_I_PCM ||
926 desc->bSamFreqType != 1) {
927 dev_err(&interface->dev,
928 "invalid format type\n");
929 return NULL;
930 }
931 return desc;
932 }
933 extralen -= desc->bLength;
934 extra += desc->bLength;
935 }
936 dev_err(&interface->dev, "sample format descriptor not found\n");
937 return NULL;
938 }
939
940 static int detect_usb_format(struct ua101 *ua)
941 {
942 const struct uac_format_type_i_discrete_descriptor *fmt_capture;
943 const struct uac_format_type_i_discrete_descriptor *fmt_playback;
944 const struct usb_endpoint_descriptor *epd;
945 unsigned int rate2;
946
947 fmt_capture = find_format_descriptor(ua->intf[INTF_CAPTURE]);
948 fmt_playback = find_format_descriptor(ua->intf[INTF_PLAYBACK]);
949 if (!fmt_capture || !fmt_playback)
950 return -ENXIO;
951
952 switch (fmt_capture->bSubframeSize) {
953 case 3:
954 ua->format_bit = SNDRV_PCM_FMTBIT_S24_3LE;
955 break;
956 case 4:
957 ua->format_bit = SNDRV_PCM_FMTBIT_S32_LE;
958 break;
959 default:
960 dev_err(&ua->dev->dev, "sample width is not 24 or 32 bits\n");
961 return -ENXIO;
962 }
963 if (fmt_capture->bSubframeSize != fmt_playback->bSubframeSize) {
964 dev_err(&ua->dev->dev,
965 "playback/capture sample widths do not match\n");
966 return -ENXIO;
967 }
968
969 if (fmt_capture->bBitResolution != 24 ||
970 fmt_playback->bBitResolution != 24) {
971 dev_err(&ua->dev->dev, "sample width is not 24 bits\n");
972 return -ENXIO;
973 }
974
975 ua->rate = combine_triple(fmt_capture->tSamFreq[0]);
976 rate2 = combine_triple(fmt_playback->tSamFreq[0]);
977 if (ua->rate != rate2) {
978 dev_err(&ua->dev->dev,
979 "playback/capture rates do not match: %u/%u\n",
980 rate2, ua->rate);
981 return -ENXIO;
982 }
983
984 switch (ua->dev->speed) {
985 case USB_SPEED_FULL:
986 ua->packets_per_second = 1000;
987 break;
988 case USB_SPEED_HIGH:
989 ua->packets_per_second = 8000;
990 break;
991 default:
992 dev_err(&ua->dev->dev, "unknown device speed\n");
993 return -ENXIO;
994 }
995
996 ua->capture.channels = fmt_capture->bNrChannels;
997 ua->playback.channels = fmt_playback->bNrChannels;
998 ua->capture.frame_bytes =
999 fmt_capture->bSubframeSize * ua->capture.channels;
1000 ua->playback.frame_bytes =
1001 fmt_playback->bSubframeSize * ua->playback.channels;
1002
1003 epd = &ua->intf[INTF_CAPTURE]->altsetting[1].endpoint[0].desc;
1004 if (!usb_endpoint_is_isoc_in(epd)) {
1005 dev_err(&ua->dev->dev, "invalid capture endpoint\n");
1006 return -ENXIO;
1007 }
1008 ua->capture.usb_pipe = usb_rcvisocpipe(ua->dev, usb_endpoint_num(epd));
1009 ua->capture.max_packet_bytes = usb_endpoint_maxp(epd);
1010
1011 epd = &ua->intf[INTF_PLAYBACK]->altsetting[1].endpoint[0].desc;
1012 if (!usb_endpoint_is_isoc_out(epd)) {
1013 dev_err(&ua->dev->dev, "invalid playback endpoint\n");
1014 return -ENXIO;
1015 }
1016 ua->playback.usb_pipe = usb_sndisocpipe(ua->dev, usb_endpoint_num(epd));
1017 ua->playback.max_packet_bytes = usb_endpoint_maxp(epd);
1018 return 0;
1019 }
1020
1021 static int alloc_stream_buffers(struct ua101 *ua, struct ua101_stream *stream)
1022 {
1023 unsigned int remaining_packets, packets, packets_per_page, i;
1024 size_t size;
1025
1026 stream->queue_length = queue_length;
1027 stream->queue_length = max(stream->queue_length,
1028 (unsigned int)MIN_QUEUE_LENGTH);
1029 stream->queue_length = min(stream->queue_length,
1030 (unsigned int)MAX_QUEUE_LENGTH);
1031
1032 /*
1033 * The cache pool sizes used by usb_alloc_coherent() (128, 512, 2048) are
1034 * quite bad when used with the packet sizes of this device (e.g. 280,
1035 * 520, 624). Therefore, we allocate and subdivide entire pages, using
1036 * a smaller buffer only for the last chunk.
1037 */
1038 remaining_packets = stream->queue_length;
1039 packets_per_page = PAGE_SIZE / stream->max_packet_bytes;
1040 for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i) {
1041 packets = min(remaining_packets, packets_per_page);
1042 size = packets * stream->max_packet_bytes;
1043 stream->buffers[i].addr =
1044 usb_alloc_coherent(ua->dev, size, GFP_KERNEL,
1045 &stream->buffers[i].dma);
1046 if (!stream->buffers[i].addr)
1047 return -ENOMEM;
1048 stream->buffers[i].size = size;
1049 remaining_packets -= packets;
1050 if (!remaining_packets)
1051 break;
1052 }
1053 if (remaining_packets) {
1054 dev_err(&ua->dev->dev, "too many packets\n");
1055 return -ENXIO;
1056 }
1057 return 0;
1058 }
1059
1060 static void free_stream_buffers(struct ua101 *ua, struct ua101_stream *stream)
1061 {
1062 unsigned int i;
1063
1064 for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i)
1065 usb_free_coherent(ua->dev,
1066 stream->buffers[i].size,
1067 stream->buffers[i].addr,
1068 stream->buffers[i].dma);
1069 }
1070
1071 static int alloc_stream_urbs(struct ua101 *ua, struct ua101_stream *stream,
1072 void (*urb_complete)(struct urb *))
1073 {
1074 unsigned max_packet_size = stream->max_packet_bytes;
1075 struct ua101_urb *urb;
1076 unsigned int b, u = 0;
1077
1078 for (b = 0; b < ARRAY_SIZE(stream->buffers); ++b) {
1079 unsigned int size = stream->buffers[b].size;
1080 u8 *addr = stream->buffers[b].addr;
1081 dma_addr_t dma = stream->buffers[b].dma;
1082
1083 while (size >= max_packet_size) {
1084 if (u >= stream->queue_length)
1085 goto bufsize_error;
1086 urb = kmalloc(sizeof(*urb), GFP_KERNEL);
1087 if (!urb)
1088 return -ENOMEM;
1089 usb_init_urb(&urb->urb);
1090 urb->urb.dev = ua->dev;
1091 urb->urb.pipe = stream->usb_pipe;
1092 urb->urb.transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1093 urb->urb.transfer_buffer = addr;
1094 urb->urb.transfer_dma = dma;
1095 urb->urb.transfer_buffer_length = max_packet_size;
1096 urb->urb.number_of_packets = 1;
1097 urb->urb.interval = 1;
1098 urb->urb.context = ua;
1099 urb->urb.complete = urb_complete;
1100 urb->urb.iso_frame_desc[0].offset = 0;
1101 urb->urb.iso_frame_desc[0].length = max_packet_size;
1102 stream->urbs[u++] = urb;
1103 size -= max_packet_size;
1104 addr += max_packet_size;
1105 dma += max_packet_size;
1106 }
1107 }
1108 if (u == stream->queue_length)
1109 return 0;
1110 bufsize_error:
1111 dev_err(&ua->dev->dev, "internal buffer size error\n");
1112 return -ENXIO;
1113 }
1114
1115 static void free_stream_urbs(struct ua101_stream *stream)
1116 {
1117 unsigned int i;
1118
1119 for (i = 0; i < stream->queue_length; ++i) {
1120 kfree(stream->urbs[i]);
1121 stream->urbs[i] = NULL;
1122 }
1123 }
1124
1125 static void free_usb_related_resources(struct ua101 *ua,
1126 struct usb_interface *interface)
1127 {
1128 unsigned int i;
1129 struct usb_interface *intf;
1130
1131 mutex_lock(&ua->mutex);
1132 free_stream_urbs(&ua->capture);
1133 free_stream_urbs(&ua->playback);
1134 mutex_unlock(&ua->mutex);
1135 free_stream_buffers(ua, &ua->capture);
1136 free_stream_buffers(ua, &ua->playback);
1137
1138 for (i = 0; i < ARRAY_SIZE(ua->intf); ++i) {
1139 mutex_lock(&ua->mutex);
1140 intf = ua->intf[i];
1141 ua->intf[i] = NULL;
1142 mutex_unlock(&ua->mutex);
1143 if (intf) {
1144 usb_set_intfdata(intf, NULL);
1145 if (intf != interface)
1146 usb_driver_release_interface(&ua101_driver,
1147 intf);
1148 }
1149 }
1150 }
1151
1152 static void ua101_card_free(struct snd_card *card)
1153 {
1154 struct ua101 *ua = card->private_data;
1155
1156 mutex_destroy(&ua->mutex);
1157 }
1158
1159 static int ua101_probe(struct usb_interface *interface,
1160 const struct usb_device_id *usb_id)
1161 {
1162 static const struct snd_usb_midi_endpoint_info midi_ep = {
1163 .out_cables = 0x0001,
1164 .in_cables = 0x0001
1165 };
1166 static const struct snd_usb_audio_quirk midi_quirk = {
1167 .type = QUIRK_MIDI_FIXED_ENDPOINT,
1168 .data = &midi_ep
1169 };
1170 static const int intf_numbers[2][3] = {
1171 { /* UA-101 */
1172 [INTF_PLAYBACK] = 0,
1173 [INTF_CAPTURE] = 1,
1174 [INTF_MIDI] = 2,
1175 },
1176 { /* UA-1000 */
1177 [INTF_CAPTURE] = 1,
1178 [INTF_PLAYBACK] = 2,
1179 [INTF_MIDI] = 3,
1180 },
1181 };
1182 struct snd_card *card;
1183 struct ua101 *ua;
1184 unsigned int card_index, i;
1185 int is_ua1000;
1186 const char *name;
1187 char usb_path[32];
1188 int err;
1189
1190 is_ua1000 = usb_id->idProduct == 0x0044;
1191
1192 if (interface->altsetting->desc.bInterfaceNumber !=
1193 intf_numbers[is_ua1000][0])
1194 return -ENODEV;
1195
1196 mutex_lock(&devices_mutex);
1197
1198 for (card_index = 0; card_index < SNDRV_CARDS; ++card_index)
1199 if (enable[card_index] && !(devices_used & (1 << card_index)))
1200 break;
1201 if (card_index >= SNDRV_CARDS) {
1202 mutex_unlock(&devices_mutex);
1203 return -ENOENT;
1204 }
1205 err = snd_card_new(&interface->dev,
1206 index[card_index], id[card_index], THIS_MODULE,
1207 sizeof(*ua), &card);
1208 if (err < 0) {
1209 mutex_unlock(&devices_mutex);
1210 return err;
1211 }
1212 card->private_free = ua101_card_free;
1213 ua = card->private_data;
1214 ua->dev = interface_to_usbdev(interface);
1215 ua->card = card;
1216 ua->card_index = card_index;
1217 INIT_LIST_HEAD(&ua->midi_list);
1218 spin_lock_init(&ua->lock);
1219 mutex_init(&ua->mutex);
1220 INIT_LIST_HEAD(&ua->ready_playback_urbs);
1221 tasklet_init(&ua->playback_tasklet,
1222 playback_tasklet, (unsigned long)ua);
1223 init_waitqueue_head(&ua->alsa_capture_wait);
1224 init_waitqueue_head(&ua->rate_feedback_wait);
1225 init_waitqueue_head(&ua->alsa_playback_wait);
1226
1227 ua->intf[0] = interface;
1228 for (i = 1; i < ARRAY_SIZE(ua->intf); ++i) {
1229 ua->intf[i] = usb_ifnum_to_if(ua->dev,
1230 intf_numbers[is_ua1000][i]);
1231 if (!ua->intf[i]) {
1232 dev_err(&ua->dev->dev, "interface %u not found\n",
1233 intf_numbers[is_ua1000][i]);
1234 err = -ENXIO;
1235 goto probe_error;
1236 }
1237 err = usb_driver_claim_interface(&ua101_driver,
1238 ua->intf[i], ua);
1239 if (err < 0) {
1240 ua->intf[i] = NULL;
1241 err = -EBUSY;
1242 goto probe_error;
1243 }
1244 }
1245
1246 err = detect_usb_format(ua);
1247 if (err < 0)
1248 goto probe_error;
1249
1250 name = usb_id->idProduct == 0x0044 ? "UA-1000" : "UA-101";
1251 strcpy(card->driver, "UA-101");
1252 strcpy(card->shortname, name);
1253 usb_make_path(ua->dev, usb_path, sizeof(usb_path));
1254 snprintf(ua->card->longname, sizeof(ua->card->longname),
1255 "EDIROL %s (serial %s), %u Hz at %s, %s speed", name,
1256 ua->dev->serial ? ua->dev->serial : "?", ua->rate, usb_path,
1257 ua->dev->speed == USB_SPEED_HIGH ? "high" : "full");
1258
1259 err = alloc_stream_buffers(ua, &ua->capture);
1260 if (err < 0)
1261 goto probe_error;
1262 err = alloc_stream_buffers(ua, &ua->playback);
1263 if (err < 0)
1264 goto probe_error;
1265
1266 err = alloc_stream_urbs(ua, &ua->capture, capture_urb_complete);
1267 if (err < 0)
1268 goto probe_error;
1269 err = alloc_stream_urbs(ua, &ua->playback, playback_urb_complete);
1270 if (err < 0)
1271 goto probe_error;
1272
1273 err = snd_pcm_new(card, name, 0, 1, 1, &ua->pcm);
1274 if (err < 0)
1275 goto probe_error;
1276 ua->pcm->private_data = ua;
1277 strcpy(ua->pcm->name, name);
1278 snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_pcm_ops);
1279 snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_pcm_ops);
1280 snd_pcm_set_managed_buffer_all(ua->pcm, SNDRV_DMA_TYPE_VMALLOC,
1281 NULL, 0, 0);
1282
1283 err = snd_usbmidi_create(card, ua->intf[INTF_MIDI],
1284 &ua->midi_list, &midi_quirk);
1285 if (err < 0)
1286 goto probe_error;
1287
1288 err = snd_card_register(card);
1289 if (err < 0)
1290 goto probe_error;
1291
1292 usb_set_intfdata(interface, ua);
1293 devices_used |= 1 << card_index;
1294
1295 mutex_unlock(&devices_mutex);
1296 return 0;
1297
1298 probe_error:
1299 free_usb_related_resources(ua, interface);
1300 snd_card_free(card);
1301 mutex_unlock(&devices_mutex);
1302 return err;
1303 }
1304
1305 static void ua101_disconnect(struct usb_interface *interface)
1306 {
1307 struct ua101 *ua = usb_get_intfdata(interface);
1308 struct list_head *midi;
1309
1310 if (!ua)
1311 return;
1312
1313 mutex_lock(&devices_mutex);
1314
1315 set_bit(DISCONNECTED, &ua->states);
1316 wake_up(&ua->rate_feedback_wait);
1317
1318 /* make sure that userspace cannot create new requests */
1319 snd_card_disconnect(ua->card);
1320
1321 /* make sure that there are no pending USB requests */
1322 list_for_each(midi, &ua->midi_list)
1323 snd_usbmidi_disconnect(midi);
1324 abort_alsa_playback(ua);
1325 abort_alsa_capture(ua);
1326 mutex_lock(&ua->mutex);
1327 stop_usb_playback(ua);
1328 stop_usb_capture(ua);
1329 mutex_unlock(&ua->mutex);
1330
1331 free_usb_related_resources(ua, interface);
1332
1333 devices_used &= ~(1 << ua->card_index);
1334
1335 snd_card_free_when_closed(ua->card);
1336
1337 mutex_unlock(&devices_mutex);
1338 }
1339
1340 static const struct usb_device_id ua101_ids[] = {
1341 { USB_DEVICE(0x0582, 0x0044) }, /* UA-1000 high speed */
1342 { USB_DEVICE(0x0582, 0x007d) }, /* UA-101 high speed */
1343 { USB_DEVICE(0x0582, 0x008d) }, /* UA-101 full speed */
1344 { }
1345 };
1346 MODULE_DEVICE_TABLE(usb, ua101_ids);
1347
1348 static struct usb_driver ua101_driver = {
1349 .name = "snd-ua101",
1350 .id_table = ua101_ids,
1351 .probe = ua101_probe,
1352 .disconnect = ua101_disconnect,
1353 #if 0
1354 .suspend = ua101_suspend,
1355 .resume = ua101_resume,
1356 #endif
1357 };
1358
1359 module_usb_driver(ua101_driver);
Linux with added FPC-III support