Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
[linux-2.6.git] / sound / usb / misc / ua101.c
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 #include "../midi.h"
28
29 MODULE_DESCRIPTION("Edirol UA-101/1000 driver");
30 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
31 MODULE_LICENSE("GPL v2");
32 MODULE_SUPPORTED_DEVICE("{{Edirol,UA-101},{Edirol,UA-1000}}");
33
34 /*
35  * Should not be lower than the minimum scheduling delay of the host
36  * controller.  Some Intel controllers need more than one frame; as long as
37  * that driver doesn't tell us about this, use 1.5 frames just to be sure.
38  */
39 #define MIN_QUEUE_LENGTH        12
40 /* Somewhat random. */
41 #define MAX_QUEUE_LENGTH        30
42 /*
43  * This magic value optimizes memory usage efficiency for the UA-101's packet
44  * sizes at all sample rates, taking into account the stupid cache pool sizes
45  * that usb_alloc_coherent() uses.
46  */
47 #define DEFAULT_QUEUE_LENGTH    21
48
49 #define MAX_PACKET_SIZE         672 /* hardware specific */
50 #define MAX_MEMORY_BUFFERS      DIV_ROUND_UP(MAX_QUEUE_LENGTH, \
51                                              PAGE_SIZE / MAX_PACKET_SIZE)
52
53 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
54 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
55 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
56 static unsigned int queue_length = 21;
57
58 module_param_array(index, int, NULL, 0444);
59 MODULE_PARM_DESC(index, "card index");
60 module_param_array(id, charp, NULL, 0444);
61 MODULE_PARM_DESC(id, "ID string");
62 module_param_array(enable, bool, NULL, 0444);
63 MODULE_PARM_DESC(enable, "enable card");
64 module_param(queue_length, uint, 0644);
65 MODULE_PARM_DESC(queue_length, "USB queue length in microframes, "
66                  __stringify(MIN_QUEUE_LENGTH)"-"__stringify(MAX_QUEUE_LENGTH));
67
68 enum {
69         INTF_PLAYBACK,
70         INTF_CAPTURE,
71         INTF_MIDI,
72
73         INTF_COUNT
74 };
75
76 /* bits in struct ua101::states */
77 enum {
78         USB_CAPTURE_RUNNING,
79         USB_PLAYBACK_RUNNING,
80         ALSA_CAPTURE_OPEN,
81         ALSA_PLAYBACK_OPEN,
82         ALSA_CAPTURE_RUNNING,
83         ALSA_PLAYBACK_RUNNING,
84         CAPTURE_URB_COMPLETED,
85         PLAYBACK_URB_COMPLETED,
86         DISCONNECTED,
87 };
88
89 struct ua101 {
90         struct usb_device *dev;
91         struct snd_card *card;
92         struct usb_interface *intf[INTF_COUNT];
93         int card_index;
94         struct snd_pcm *pcm;
95         struct list_head midi_list;
96         u64 format_bit;
97         unsigned int rate;
98         unsigned int packets_per_second;
99         spinlock_t lock;
100         struct mutex mutex;
101         unsigned long states;
102
103         /* FIFO to synchronize playback rate to capture rate */
104         unsigned int rate_feedback_start;
105         unsigned int rate_feedback_count;
106         u8 rate_feedback[MAX_QUEUE_LENGTH];
107
108         struct list_head ready_playback_urbs;
109         struct tasklet_struct playback_tasklet;
110         wait_queue_head_t alsa_capture_wait;
111         wait_queue_head_t rate_feedback_wait;
112         wait_queue_head_t alsa_playback_wait;
113         struct ua101_stream {
114                 struct snd_pcm_substream *substream;
115                 unsigned int usb_pipe;
116                 unsigned int channels;
117                 unsigned int frame_bytes;
118                 unsigned int max_packet_bytes;
119                 unsigned int period_pos;
120                 unsigned int buffer_pos;
121                 unsigned int queue_length;
122                 struct ua101_urb {
123                         struct urb urb;
124                         struct usb_iso_packet_descriptor iso_frame_desc[1];
125                         struct list_head ready_list;
126                 } *urbs[MAX_QUEUE_LENGTH];
127                 struct {
128                         unsigned int size;
129                         void *addr;
130                         dma_addr_t dma;
131                 } buffers[MAX_MEMORY_BUFFERS];
132         } capture, playback;
133 };
134
135 static DEFINE_MUTEX(devices_mutex);
136 static unsigned int devices_used;
137 static struct usb_driver ua101_driver;
138
139 static void abort_alsa_playback(struct ua101 *ua);
140 static void abort_alsa_capture(struct ua101 *ua);
141
142 static const char *usb_error_string(int err)
143 {
144         switch (err) {
145         case -ENODEV:
146                 return "no device";
147         case -ENOENT:
148                 return "endpoint not enabled";
149         case -EPIPE:
150                 return "endpoint stalled";
151         case -ENOSPC:
152                 return "not enough bandwidth";
153         case -ESHUTDOWN:
154                 return "device disabled";
155         case -EHOSTUNREACH:
156                 return "device suspended";
157         case -EINVAL:
158         case -EAGAIN:
159         case -EFBIG:
160         case -EMSGSIZE:
161                 return "internal error";
162         default:
163                 return "unknown error";
164         }
165 }
166
167 static void abort_usb_capture(struct ua101 *ua)
168 {
169         if (test_and_clear_bit(USB_CAPTURE_RUNNING, &ua->states)) {
170                 wake_up(&ua->alsa_capture_wait);
171                 wake_up(&ua->rate_feedback_wait);
172         }
173 }
174
175 static void abort_usb_playback(struct ua101 *ua)
176 {
177         if (test_and_clear_bit(USB_PLAYBACK_RUNNING, &ua->states))
178                 wake_up(&ua->alsa_playback_wait);
179 }
180
181 static void playback_urb_complete(struct urb *usb_urb)
182 {
183         struct ua101_urb *urb = (struct ua101_urb *)usb_urb;
184         struct ua101 *ua = urb->urb.context;
185         unsigned long flags;
186
187         if (unlikely(urb->urb.status == -ENOENT ||      /* unlinked */
188                      urb->urb.status == -ENODEV ||      /* device removed */
189                      urb->urb.status == -ECONNRESET ||  /* unlinked */
190                      urb->urb.status == -ESHUTDOWN)) {  /* device disabled */
191                 abort_usb_playback(ua);
192                 abort_alsa_playback(ua);
193                 return;
194         }
195
196         if (test_bit(USB_PLAYBACK_RUNNING, &ua->states)) {
197                 /* append URB to FIFO */
198                 spin_lock_irqsave(&ua->lock, flags);
199                 list_add_tail(&urb->ready_list, &ua->ready_playback_urbs);
200                 if (ua->rate_feedback_count > 0)
201                         tasklet_schedule(&ua->playback_tasklet);
202                 ua->playback.substream->runtime->delay -=
203                                 urb->urb.iso_frame_desc[0].length /
204                                                 ua->playback.frame_bytes;
205                 spin_unlock_irqrestore(&ua->lock, flags);
206         }
207 }
208
209 static void first_playback_urb_complete(struct urb *urb)
210 {
211         struct ua101 *ua = urb->context;
212
213         urb->complete = playback_urb_complete;
214         playback_urb_complete(urb);
215
216         set_bit(PLAYBACK_URB_COMPLETED, &ua->states);
217         wake_up(&ua->alsa_playback_wait);
218 }
219
220 /* copy data from the ALSA ring buffer into the URB buffer */
221 static bool copy_playback_data(struct ua101_stream *stream, struct urb *urb,
222                                unsigned int frames)
223 {
224         struct snd_pcm_runtime *runtime;
225         unsigned int frame_bytes, frames1;
226         const u8 *source;
227
228         runtime = stream->substream->runtime;
229         frame_bytes = stream->frame_bytes;
230         source = runtime->dma_area + stream->buffer_pos * frame_bytes;
231         if (stream->buffer_pos + frames <= runtime->buffer_size) {
232                 memcpy(urb->transfer_buffer, source, frames * frame_bytes);
233         } else {
234                 /* wrap around at end of ring buffer */
235                 frames1 = runtime->buffer_size - stream->buffer_pos;
236                 memcpy(urb->transfer_buffer, source, frames1 * frame_bytes);
237                 memcpy(urb->transfer_buffer + frames1 * frame_bytes,
238                        runtime->dma_area, (frames - frames1) * frame_bytes);
239         }
240
241         stream->buffer_pos += frames;
242         if (stream->buffer_pos >= runtime->buffer_size)
243                 stream->buffer_pos -= runtime->buffer_size;
244         stream->period_pos += frames;
245         if (stream->period_pos >= runtime->period_size) {
246                 stream->period_pos -= runtime->period_size;
247                 return true;
248         }
249         return false;
250 }
251
252 static inline void add_with_wraparound(struct ua101 *ua,
253                                        unsigned int *value, unsigned int add)
254 {
255         *value += add;
256         if (*value >= ua->playback.queue_length)
257                 *value -= ua->playback.queue_length;
258 }
259
260 static void playback_tasklet(unsigned long data)
261 {
262         struct ua101 *ua = (void *)data;
263         unsigned long flags;
264         unsigned int frames;
265         struct ua101_urb *urb;
266         bool do_period_elapsed = false;
267         int err;
268
269         if (unlikely(!test_bit(USB_PLAYBACK_RUNNING, &ua->states)))
270                 return;
271
272         /*
273          * Synchronizing the playback rate to the capture rate is done by using
274          * the same sequence of packet sizes for both streams.
275          * Submitting a playback URB therefore requires both a ready URB and
276          * the size of the corresponding capture packet, i.e., both playback
277          * and capture URBs must have been completed.  Since the USB core does
278          * not guarantee that playback and capture complete callbacks are
279          * called alternately, we use two FIFOs for packet sizes and read URBs;
280          * submitting playback URBs is possible as long as both FIFOs are
281          * nonempty.
282          */
283         spin_lock_irqsave(&ua->lock, flags);
284         while (ua->rate_feedback_count > 0 &&
285                !list_empty(&ua->ready_playback_urbs)) {
286                 /* take packet size out of FIFO */
287                 frames = ua->rate_feedback[ua->rate_feedback_start];
288                 add_with_wraparound(ua, &ua->rate_feedback_start, 1);
289                 ua->rate_feedback_count--;
290
291                 /* take URB out of FIFO */
292                 urb = list_first_entry(&ua->ready_playback_urbs,
293                                        struct ua101_urb, ready_list);
294                 list_del(&urb->ready_list);
295
296                 /* fill packet with data or silence */
297                 urb->urb.iso_frame_desc[0].length =
298                         frames * ua->playback.frame_bytes;
299                 if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states))
300                         do_period_elapsed |= copy_playback_data(&ua->playback,
301                                                                 &urb->urb,
302                                                                 frames);
303                 else
304                         memset(urb->urb.transfer_buffer, 0,
305                                urb->urb.iso_frame_desc[0].length);
306
307                 /* and off you go ... */
308                 err = usb_submit_urb(&urb->urb, GFP_ATOMIC);
309                 if (unlikely(err < 0)) {
310                         spin_unlock_irqrestore(&ua->lock, flags);
311                         abort_usb_playback(ua);
312                         abort_alsa_playback(ua);
313                         dev_err(&ua->dev->dev, "USB request error %d: %s\n",
314                                 err, usb_error_string(err));
315                         return;
316                 }
317                 ua->playback.substream->runtime->delay += frames;
318         }
319         spin_unlock_irqrestore(&ua->lock, flags);
320         if (do_period_elapsed)
321                 snd_pcm_period_elapsed(ua->playback.substream);
322 }
323
324 /* copy data from the URB buffer into the ALSA ring buffer */
325 static bool copy_capture_data(struct ua101_stream *stream, struct urb *urb,
326                               unsigned int frames)
327 {
328         struct snd_pcm_runtime *runtime;
329         unsigned int frame_bytes, frames1;
330         u8 *dest;
331
332         runtime = stream->substream->runtime;
333         frame_bytes = stream->frame_bytes;
334         dest = runtime->dma_area + stream->buffer_pos * frame_bytes;
335         if (stream->buffer_pos + frames <= runtime->buffer_size) {
336                 memcpy(dest, urb->transfer_buffer, frames * frame_bytes);
337         } else {
338                 /* wrap around at end of ring buffer */
339                 frames1 = runtime->buffer_size - stream->buffer_pos;
340                 memcpy(dest, urb->transfer_buffer, frames1 * frame_bytes);
341                 memcpy(runtime->dma_area,
342                        urb->transfer_buffer + frames1 * frame_bytes,
343                        (frames - frames1) * frame_bytes);
344         }
345
346         stream->buffer_pos += frames;
347         if (stream->buffer_pos >= runtime->buffer_size)
348                 stream->buffer_pos -= runtime->buffer_size;
349         stream->period_pos += frames;
350         if (stream->period_pos >= runtime->period_size) {
351                 stream->period_pos -= runtime->period_size;
352                 return true;
353         }
354         return false;
355 }
356
357 static void capture_urb_complete(struct urb *urb)
358 {
359         struct ua101 *ua = urb->context;
360         struct ua101_stream *stream = &ua->capture;
361         unsigned long flags;
362         unsigned int frames, write_ptr;
363         bool do_period_elapsed;
364         int err;
365
366         if (unlikely(urb->status == -ENOENT ||          /* unlinked */
367                      urb->status == -ENODEV ||          /* device removed */
368                      urb->status == -ECONNRESET ||      /* unlinked */
369                      urb->status == -ESHUTDOWN))        /* device disabled */
370                 goto stream_stopped;
371
372         if (urb->status >= 0 && urb->iso_frame_desc[0].status >= 0)
373                 frames = urb->iso_frame_desc[0].actual_length /
374                         stream->frame_bytes;
375         else
376                 frames = 0;
377
378         spin_lock_irqsave(&ua->lock, flags);
379
380         if (frames > 0 && test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
381                 do_period_elapsed = copy_capture_data(stream, urb, frames);
382         else
383                 do_period_elapsed = false;
384
385         if (test_bit(USB_CAPTURE_RUNNING, &ua->states)) {
386                 err = usb_submit_urb(urb, GFP_ATOMIC);
387                 if (unlikely(err < 0)) {
388                         spin_unlock_irqrestore(&ua->lock, flags);
389                         dev_err(&ua->dev->dev, "USB request error %d: %s\n",
390                                 err, usb_error_string(err));
391                         goto stream_stopped;
392                 }
393
394                 /* append packet size to FIFO */
395                 write_ptr = ua->rate_feedback_start;
396                 add_with_wraparound(ua, &write_ptr, ua->rate_feedback_count);
397                 ua->rate_feedback[write_ptr] = frames;
398                 if (ua->rate_feedback_count < ua->playback.queue_length) {
399                         ua->rate_feedback_count++;
400                         if (ua->rate_feedback_count ==
401                                                 ua->playback.queue_length)
402                                 wake_up(&ua->rate_feedback_wait);
403                 } else {
404                         /*
405                          * Ring buffer overflow; this happens when the playback
406                          * stream is not running.  Throw away the oldest entry,
407                          * so that the playback stream, when it starts, sees
408                          * the most recent packet sizes.
409                          */
410                         add_with_wraparound(ua, &ua->rate_feedback_start, 1);
411                 }
412                 if (test_bit(USB_PLAYBACK_RUNNING, &ua->states) &&
413                     !list_empty(&ua->ready_playback_urbs))
414                         tasklet_schedule(&ua->playback_tasklet);
415         }
416
417         spin_unlock_irqrestore(&ua->lock, flags);
418
419         if (do_period_elapsed)
420                 snd_pcm_period_elapsed(stream->substream);
421
422         return;
423
424 stream_stopped:
425         abort_usb_playback(ua);
426         abort_usb_capture(ua);
427         abort_alsa_playback(ua);
428         abort_alsa_capture(ua);
429 }
430
431 static void first_capture_urb_complete(struct urb *urb)
432 {
433         struct ua101 *ua = urb->context;
434
435         urb->complete = capture_urb_complete;
436         capture_urb_complete(urb);
437
438         set_bit(CAPTURE_URB_COMPLETED, &ua->states);
439         wake_up(&ua->alsa_capture_wait);
440 }
441
442 static int submit_stream_urbs(struct ua101 *ua, struct ua101_stream *stream)
443 {
444         unsigned int i;
445
446         for (i = 0; i < stream->queue_length; ++i) {
447                 int err = usb_submit_urb(&stream->urbs[i]->urb, GFP_KERNEL);
448                 if (err < 0) {
449                         dev_err(&ua->dev->dev, "USB request error %d: %s\n",
450                                 err, usb_error_string(err));
451                         return err;
452                 }
453         }
454         return 0;
455 }
456
457 static void kill_stream_urbs(struct ua101_stream *stream)
458 {
459         unsigned int i;
460
461         for (i = 0; i < stream->queue_length; ++i)
462                 usb_kill_urb(&stream->urbs[i]->urb);
463 }
464
465 static int enable_iso_interface(struct ua101 *ua, unsigned int intf_index)
466 {
467         struct usb_host_interface *alts;
468
469         alts = ua->intf[intf_index]->cur_altsetting;
470         if (alts->desc.bAlternateSetting != 1) {
471                 int err = usb_set_interface(ua->dev,
472                                             alts->desc.bInterfaceNumber, 1);
473                 if (err < 0) {
474                         dev_err(&ua->dev->dev,
475                                 "cannot initialize interface; error %d: %s\n",
476                                 err, usb_error_string(err));
477                         return err;
478                 }
479         }
480         return 0;
481 }
482
483 static void disable_iso_interface(struct ua101 *ua, unsigned int intf_index)
484 {
485         struct usb_host_interface *alts;
486
487         alts = ua->intf[intf_index]->cur_altsetting;
488         if (alts->desc.bAlternateSetting != 0) {
489                 int err = usb_set_interface(ua->dev,
490                                             alts->desc.bInterfaceNumber, 0);
491                 if (err < 0 && !test_bit(DISCONNECTED, &ua->states))
492                         dev_warn(&ua->dev->dev,
493                                  "interface reset failed; error %d: %s\n",
494                                  err, usb_error_string(err));
495         }
496 }
497
498 static void stop_usb_capture(struct ua101 *ua)
499 {
500         clear_bit(USB_CAPTURE_RUNNING, &ua->states);
501
502         kill_stream_urbs(&ua->capture);
503
504         disable_iso_interface(ua, INTF_CAPTURE);
505 }
506
507 static int start_usb_capture(struct ua101 *ua)
508 {
509         int err;
510
511         if (test_bit(DISCONNECTED, &ua->states))
512                 return -ENODEV;
513
514         if (test_bit(USB_CAPTURE_RUNNING, &ua->states))
515                 return 0;
516
517         kill_stream_urbs(&ua->capture);
518
519         err = enable_iso_interface(ua, INTF_CAPTURE);
520         if (err < 0)
521                 return err;
522
523         clear_bit(CAPTURE_URB_COMPLETED, &ua->states);
524         ua->capture.urbs[0]->urb.complete = first_capture_urb_complete;
525         ua->rate_feedback_start = 0;
526         ua->rate_feedback_count = 0;
527
528         set_bit(USB_CAPTURE_RUNNING, &ua->states);
529         err = submit_stream_urbs(ua, &ua->capture);
530         if (err < 0)
531                 stop_usb_capture(ua);
532         return err;
533 }
534
535 static void stop_usb_playback(struct ua101 *ua)
536 {
537         clear_bit(USB_PLAYBACK_RUNNING, &ua->states);
538
539         kill_stream_urbs(&ua->playback);
540
541         tasklet_kill(&ua->playback_tasklet);
542
543         disable_iso_interface(ua, INTF_PLAYBACK);
544 }
545
546 static int start_usb_playback(struct ua101 *ua)
547 {
548         unsigned int i, frames;
549         struct urb *urb;
550         int err = 0;
551
552         if (test_bit(DISCONNECTED, &ua->states))
553                 return -ENODEV;
554
555         if (test_bit(USB_PLAYBACK_RUNNING, &ua->states))
556                 return 0;
557
558         kill_stream_urbs(&ua->playback);
559         tasklet_kill(&ua->playback_tasklet);
560
561         err = enable_iso_interface(ua, INTF_PLAYBACK);
562         if (err < 0)
563                 return err;
564
565         clear_bit(PLAYBACK_URB_COMPLETED, &ua->states);
566         ua->playback.urbs[0]->urb.complete =
567                 first_playback_urb_complete;
568         spin_lock_irq(&ua->lock);
569         INIT_LIST_HEAD(&ua->ready_playback_urbs);
570         spin_unlock_irq(&ua->lock);
571
572         /*
573          * We submit the initial URBs all at once, so we have to wait for the
574          * packet size FIFO to be full.
575          */
576         wait_event(ua->rate_feedback_wait,
577                    ua->rate_feedback_count >= ua->playback.queue_length ||
578                    !test_bit(USB_CAPTURE_RUNNING, &ua->states) ||
579                    test_bit(DISCONNECTED, &ua->states));
580         if (test_bit(DISCONNECTED, &ua->states)) {
581                 stop_usb_playback(ua);
582                 return -ENODEV;
583         }
584         if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) {
585                 stop_usb_playback(ua);
586                 return -EIO;
587         }
588
589         for (i = 0; i < ua->playback.queue_length; ++i) {
590                 /* all initial URBs contain silence */
591                 spin_lock_irq(&ua->lock);
592                 frames = ua->rate_feedback[ua->rate_feedback_start];
593                 add_with_wraparound(ua, &ua->rate_feedback_start, 1);
594                 ua->rate_feedback_count--;
595                 spin_unlock_irq(&ua->lock);
596                 urb = &ua->playback.urbs[i]->urb;
597                 urb->iso_frame_desc[0].length =
598                         frames * ua->playback.frame_bytes;
599                 memset(urb->transfer_buffer, 0,
600                        urb->iso_frame_desc[0].length);
601         }
602
603         set_bit(USB_PLAYBACK_RUNNING, &ua->states);
604         err = submit_stream_urbs(ua, &ua->playback);
605         if (err < 0)
606                 stop_usb_playback(ua);
607         return err;
608 }
609
610 static void abort_alsa_capture(struct ua101 *ua)
611 {
612         if (test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
613                 snd_pcm_stop(ua->capture.substream, SNDRV_PCM_STATE_XRUN);
614 }
615
616 static void abort_alsa_playback(struct ua101 *ua)
617 {
618         if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states))
619                 snd_pcm_stop(ua->playback.substream, SNDRV_PCM_STATE_XRUN);
620 }
621
622 static int set_stream_hw(struct ua101 *ua, struct snd_pcm_substream *substream,
623                          unsigned int channels)
624 {
625         int err;
626
627         substream->runtime->hw.info =
628                 SNDRV_PCM_INFO_MMAP |
629                 SNDRV_PCM_INFO_MMAP_VALID |
630                 SNDRV_PCM_INFO_BATCH |
631                 SNDRV_PCM_INFO_INTERLEAVED |
632                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
633                 SNDRV_PCM_INFO_FIFO_IN_FRAMES;
634         substream->runtime->hw.formats = ua->format_bit;
635         substream->runtime->hw.rates = snd_pcm_rate_to_rate_bit(ua->rate);
636         substream->runtime->hw.rate_min = ua->rate;
637         substream->runtime->hw.rate_max = ua->rate;
638         substream->runtime->hw.channels_min = channels;
639         substream->runtime->hw.channels_max = channels;
640         substream->runtime->hw.buffer_bytes_max = 45000 * 1024;
641         substream->runtime->hw.period_bytes_min = 1;
642         substream->runtime->hw.period_bytes_max = UINT_MAX;
643         substream->runtime->hw.periods_min = 2;
644         substream->runtime->hw.periods_max = UINT_MAX;
645         err = snd_pcm_hw_constraint_minmax(substream->runtime,
646                                            SNDRV_PCM_HW_PARAM_PERIOD_TIME,
647                                            1500000 / ua->packets_per_second,
648                                            8192000);
649         if (err < 0)
650                 return err;
651         err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
652         return err;
653 }
654
655 static int capture_pcm_open(struct snd_pcm_substream *substream)
656 {
657         struct ua101 *ua = substream->private_data;
658         int err;
659
660         ua->capture.substream = substream;
661         err = set_stream_hw(ua, substream, ua->capture.channels);
662         if (err < 0)
663                 return err;
664         substream->runtime->hw.fifo_size =
665                 DIV_ROUND_CLOSEST(ua->rate, ua->packets_per_second);
666         substream->runtime->delay = substream->runtime->hw.fifo_size;
667
668         mutex_lock(&ua->mutex);
669         err = start_usb_capture(ua);
670         if (err >= 0)
671                 set_bit(ALSA_CAPTURE_OPEN, &ua->states);
672         mutex_unlock(&ua->mutex);
673         return err;
674 }
675
676 static int playback_pcm_open(struct snd_pcm_substream *substream)
677 {
678         struct ua101 *ua = substream->private_data;
679         int err;
680
681         ua->playback.substream = substream;
682         err = set_stream_hw(ua, substream, ua->playback.channels);
683         if (err < 0)
684                 return err;
685         substream->runtime->hw.fifo_size =
686                 DIV_ROUND_CLOSEST(ua->rate * ua->playback.queue_length,
687                                   ua->packets_per_second);
688
689         mutex_lock(&ua->mutex);
690         err = start_usb_capture(ua);
691         if (err < 0)
692                 goto error;
693         err = start_usb_playback(ua);
694         if (err < 0) {
695                 if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states))
696                         stop_usb_capture(ua);
697                 goto error;
698         }
699         set_bit(ALSA_PLAYBACK_OPEN, &ua->states);
700 error:
701         mutex_unlock(&ua->mutex);
702         return err;
703 }
704
705 static int capture_pcm_close(struct snd_pcm_substream *substream)
706 {
707         struct ua101 *ua = substream->private_data;
708
709         mutex_lock(&ua->mutex);
710         clear_bit(ALSA_CAPTURE_OPEN, &ua->states);
711         if (!test_bit(ALSA_PLAYBACK_OPEN, &ua->states))
712                 stop_usb_capture(ua);
713         mutex_unlock(&ua->mutex);
714         return 0;
715 }
716
717 static int playback_pcm_close(struct snd_pcm_substream *substream)
718 {
719         struct ua101 *ua = substream->private_data;
720
721         mutex_lock(&ua->mutex);
722         stop_usb_playback(ua);
723         clear_bit(ALSA_PLAYBACK_OPEN, &ua->states);
724         if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states))
725                 stop_usb_capture(ua);
726         mutex_unlock(&ua->mutex);
727         return 0;
728 }
729
730 static int capture_pcm_hw_params(struct snd_pcm_substream *substream,
731                                  struct snd_pcm_hw_params *hw_params)
732 {
733         struct ua101 *ua = substream->private_data;
734         int err;
735
736         mutex_lock(&ua->mutex);
737         err = start_usb_capture(ua);
738         mutex_unlock(&ua->mutex);
739         if (err < 0)
740                 return err;
741
742         return snd_pcm_lib_alloc_vmalloc_buffer(substream,
743                                                 params_buffer_bytes(hw_params));
744 }
745
746 static int playback_pcm_hw_params(struct snd_pcm_substream *substream,
747                                   struct snd_pcm_hw_params *hw_params)
748 {
749         struct ua101 *ua = substream->private_data;
750         int err;
751
752         mutex_lock(&ua->mutex);
753         err = start_usb_capture(ua);
754         if (err >= 0)
755                 err = start_usb_playback(ua);
756         mutex_unlock(&ua->mutex);
757         if (err < 0)
758                 return err;
759
760         return snd_pcm_lib_alloc_vmalloc_buffer(substream,
761                                                 params_buffer_bytes(hw_params));
762 }
763
764 static int ua101_pcm_hw_free(struct snd_pcm_substream *substream)
765 {
766         return snd_pcm_lib_free_vmalloc_buffer(substream);
767 }
768
769 static int capture_pcm_prepare(struct snd_pcm_substream *substream)
770 {
771         struct ua101 *ua = substream->private_data;
772         int err;
773
774         mutex_lock(&ua->mutex);
775         err = start_usb_capture(ua);
776         mutex_unlock(&ua->mutex);
777         if (err < 0)
778                 return err;
779
780         /*
781          * The EHCI driver schedules the first packet of an iso stream at 10 ms
782          * in the future, i.e., no data is actually captured for that long.
783          * Take the wait here so that the stream is known to be actually
784          * running when the start trigger has been called.
785          */
786         wait_event(ua->alsa_capture_wait,
787                    test_bit(CAPTURE_URB_COMPLETED, &ua->states) ||
788                    !test_bit(USB_CAPTURE_RUNNING, &ua->states));
789         if (test_bit(DISCONNECTED, &ua->states))
790                 return -ENODEV;
791         if (!test_bit(USB_CAPTURE_RUNNING, &ua->states))
792                 return -EIO;
793
794         ua->capture.period_pos = 0;
795         ua->capture.buffer_pos = 0;
796         return 0;
797 }
798
799 static int playback_pcm_prepare(struct snd_pcm_substream *substream)
800 {
801         struct ua101 *ua = substream->private_data;
802         int err;
803
804         mutex_lock(&ua->mutex);
805         err = start_usb_capture(ua);
806         if (err >= 0)
807                 err = start_usb_playback(ua);
808         mutex_unlock(&ua->mutex);
809         if (err < 0)
810                 return err;
811
812         /* see the comment in capture_pcm_prepare() */
813         wait_event(ua->alsa_playback_wait,
814                    test_bit(PLAYBACK_URB_COMPLETED, &ua->states) ||
815                    !test_bit(USB_PLAYBACK_RUNNING, &ua->states));
816         if (test_bit(DISCONNECTED, &ua->states))
817                 return -ENODEV;
818         if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states))
819                 return -EIO;
820
821         substream->runtime->delay = 0;
822         ua->playback.period_pos = 0;
823         ua->playback.buffer_pos = 0;
824         return 0;
825 }
826
827 static int capture_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
828 {
829         struct ua101 *ua = substream->private_data;
830
831         switch (cmd) {
832         case SNDRV_PCM_TRIGGER_START:
833                 if (!test_bit(USB_CAPTURE_RUNNING, &ua->states))
834                         return -EIO;
835                 set_bit(ALSA_CAPTURE_RUNNING, &ua->states);
836                 return 0;
837         case SNDRV_PCM_TRIGGER_STOP:
838                 clear_bit(ALSA_CAPTURE_RUNNING, &ua->states);
839                 return 0;
840         default:
841                 return -EINVAL;
842         }
843 }
844
845 static int playback_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
846 {
847         struct ua101 *ua = substream->private_data;
848
849         switch (cmd) {
850         case SNDRV_PCM_TRIGGER_START:
851                 if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states))
852                         return -EIO;
853                 set_bit(ALSA_PLAYBACK_RUNNING, &ua->states);
854                 return 0;
855         case SNDRV_PCM_TRIGGER_STOP:
856                 clear_bit(ALSA_PLAYBACK_RUNNING, &ua->states);
857                 return 0;
858         default:
859                 return -EINVAL;
860         }
861 }
862
863 static inline snd_pcm_uframes_t ua101_pcm_pointer(struct ua101 *ua,
864                                                   struct ua101_stream *stream)
865 {
866         unsigned long flags;
867         unsigned int pos;
868
869         spin_lock_irqsave(&ua->lock, flags);
870         pos = stream->buffer_pos;
871         spin_unlock_irqrestore(&ua->lock, flags);
872         return pos;
873 }
874
875 static snd_pcm_uframes_t capture_pcm_pointer(struct snd_pcm_substream *subs)
876 {
877         struct ua101 *ua = subs->private_data;
878
879         return ua101_pcm_pointer(ua, &ua->capture);
880 }
881
882 static snd_pcm_uframes_t playback_pcm_pointer(struct snd_pcm_substream *subs)
883 {
884         struct ua101 *ua = subs->private_data;
885
886         return ua101_pcm_pointer(ua, &ua->playback);
887 }
888
889 static struct snd_pcm_ops capture_pcm_ops = {
890         .open = capture_pcm_open,
891         .close = capture_pcm_close,
892         .ioctl = snd_pcm_lib_ioctl,
893         .hw_params = capture_pcm_hw_params,
894         .hw_free = ua101_pcm_hw_free,
895         .prepare = capture_pcm_prepare,
896         .trigger = capture_pcm_trigger,
897         .pointer = capture_pcm_pointer,
898         .page = snd_pcm_lib_get_vmalloc_page,
899         .mmap = snd_pcm_lib_mmap_vmalloc,
900 };
901
902 static struct snd_pcm_ops playback_pcm_ops = {
903         .open = playback_pcm_open,
904         .close = playback_pcm_close,
905         .ioctl = snd_pcm_lib_ioctl,
906         .hw_params = playback_pcm_hw_params,
907         .hw_free = ua101_pcm_hw_free,
908         .prepare = playback_pcm_prepare,
909         .trigger = playback_pcm_trigger,
910         .pointer = playback_pcm_pointer,
911         .page = snd_pcm_lib_get_vmalloc_page,
912         .mmap = snd_pcm_lib_mmap_vmalloc,
913 };
914
915 static const struct uac_format_type_i_discrete_descriptor *
916 find_format_descriptor(struct usb_interface *interface)
917 {
918         struct usb_host_interface *alt;
919         u8 *extra;
920         int extralen;
921
922         if (interface->num_altsetting != 2) {
923                 dev_err(&interface->dev, "invalid num_altsetting\n");
924                 return NULL;
925         }
926
927         alt = &interface->altsetting[0];
928         if (alt->desc.bNumEndpoints != 0) {
929                 dev_err(&interface->dev, "invalid bNumEndpoints\n");
930                 return NULL;
931         }
932
933         alt = &interface->altsetting[1];
934         if (alt->desc.bNumEndpoints != 1) {
935                 dev_err(&interface->dev, "invalid bNumEndpoints\n");
936                 return NULL;
937         }
938
939         extra = alt->extra;
940         extralen = alt->extralen;
941         while (extralen >= sizeof(struct usb_descriptor_header)) {
942                 struct uac_format_type_i_discrete_descriptor *desc;
943
944                 desc = (struct uac_format_type_i_discrete_descriptor *)extra;
945                 if (desc->bLength > extralen) {
946                         dev_err(&interface->dev, "descriptor overflow\n");
947                         return NULL;
948                 }
949                 if (desc->bLength == UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1) &&
950                     desc->bDescriptorType == USB_DT_CS_INTERFACE &&
951                     desc->bDescriptorSubtype == UAC_FORMAT_TYPE) {
952                         if (desc->bFormatType != UAC_FORMAT_TYPE_I_PCM ||
953                             desc->bSamFreqType != 1) {
954                                 dev_err(&interface->dev,
955                                         "invalid format type\n");
956                                 return NULL;
957                         }
958                         return desc;
959                 }
960                 extralen -= desc->bLength;
961                 extra += desc->bLength;
962         }
963         dev_err(&interface->dev, "sample format descriptor not found\n");
964         return NULL;
965 }
966
967 static int detect_usb_format(struct ua101 *ua)
968 {
969         const struct uac_format_type_i_discrete_descriptor *fmt_capture;
970         const struct uac_format_type_i_discrete_descriptor *fmt_playback;
971         const struct usb_endpoint_descriptor *epd;
972         unsigned int rate2;
973
974         fmt_capture = find_format_descriptor(ua->intf[INTF_CAPTURE]);
975         fmt_playback = find_format_descriptor(ua->intf[INTF_PLAYBACK]);
976         if (!fmt_capture || !fmt_playback)
977                 return -ENXIO;
978
979         switch (fmt_capture->bSubframeSize) {
980         case 3:
981                 ua->format_bit = SNDRV_PCM_FMTBIT_S24_3LE;
982                 break;
983         case 4:
984                 ua->format_bit = SNDRV_PCM_FMTBIT_S32_LE;
985                 break;
986         default:
987                 dev_err(&ua->dev->dev, "sample width is not 24 or 32 bits\n");
988                 return -ENXIO;
989         }
990         if (fmt_capture->bSubframeSize != fmt_playback->bSubframeSize) {
991                 dev_err(&ua->dev->dev,
992                         "playback/capture sample widths do not match\n");
993                 return -ENXIO;
994         }
995
996         if (fmt_capture->bBitResolution != 24 ||
997             fmt_playback->bBitResolution != 24) {
998                 dev_err(&ua->dev->dev, "sample width is not 24 bits\n");
999                 return -ENXIO;
1000         }
1001
1002         ua->rate = combine_triple(fmt_capture->tSamFreq[0]);
1003         rate2 = combine_triple(fmt_playback->tSamFreq[0]);
1004         if (ua->rate != rate2) {
1005                 dev_err(&ua->dev->dev,
1006                         "playback/capture rates do not match: %u/%u\n",
1007                         rate2, ua->rate);
1008                 return -ENXIO;
1009         }
1010
1011         switch (ua->dev->speed) {
1012         case USB_SPEED_FULL:
1013                 ua->packets_per_second = 1000;
1014                 break;
1015         case USB_SPEED_HIGH:
1016                 ua->packets_per_second = 8000;
1017                 break;
1018         default:
1019                 dev_err(&ua->dev->dev, "unknown device speed\n");
1020                 return -ENXIO;
1021         }
1022
1023         ua->capture.channels = fmt_capture->bNrChannels;
1024         ua->playback.channels = fmt_playback->bNrChannels;
1025         ua->capture.frame_bytes =
1026                 fmt_capture->bSubframeSize * ua->capture.channels;
1027         ua->playback.frame_bytes =
1028                 fmt_playback->bSubframeSize * ua->playback.channels;
1029
1030         epd = &ua->intf[INTF_CAPTURE]->altsetting[1].endpoint[0].desc;
1031         if (!usb_endpoint_is_isoc_in(epd)) {
1032                 dev_err(&ua->dev->dev, "invalid capture endpoint\n");
1033                 return -ENXIO;
1034         }
1035         ua->capture.usb_pipe = usb_rcvisocpipe(ua->dev, usb_endpoint_num(epd));
1036         ua->capture.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize);
1037
1038         epd = &ua->intf[INTF_PLAYBACK]->altsetting[1].endpoint[0].desc;
1039         if (!usb_endpoint_is_isoc_out(epd)) {
1040                 dev_err(&ua->dev->dev, "invalid playback endpoint\n");
1041                 return -ENXIO;
1042         }
1043         ua->playback.usb_pipe = usb_sndisocpipe(ua->dev, usb_endpoint_num(epd));
1044         ua->playback.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize);
1045         return 0;
1046 }
1047
1048 static int alloc_stream_buffers(struct ua101 *ua, struct ua101_stream *stream)
1049 {
1050         unsigned int remaining_packets, packets, packets_per_page, i;
1051         size_t size;
1052
1053         stream->queue_length = queue_length;
1054         stream->queue_length = max(stream->queue_length,
1055                                    (unsigned int)MIN_QUEUE_LENGTH);
1056         stream->queue_length = min(stream->queue_length,
1057                                    (unsigned int)MAX_QUEUE_LENGTH);
1058
1059         /*
1060          * The cache pool sizes used by usb_alloc_coherent() (128, 512, 2048) are
1061          * quite bad when used with the packet sizes of this device (e.g. 280,
1062          * 520, 624).  Therefore, we allocate and subdivide entire pages, using
1063          * a smaller buffer only for the last chunk.
1064          */
1065         remaining_packets = stream->queue_length;
1066         packets_per_page = PAGE_SIZE / stream->max_packet_bytes;
1067         for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i) {
1068                 packets = min(remaining_packets, packets_per_page);
1069                 size = packets * stream->max_packet_bytes;
1070                 stream->buffers[i].addr =
1071                         usb_alloc_coherent(ua->dev, size, GFP_KERNEL,
1072                                            &stream->buffers[i].dma);
1073                 if (!stream->buffers[i].addr)
1074                         return -ENOMEM;
1075                 stream->buffers[i].size = size;
1076                 remaining_packets -= packets;
1077                 if (!remaining_packets)
1078                         break;
1079         }
1080         if (remaining_packets) {
1081                 dev_err(&ua->dev->dev, "too many packets\n");
1082                 return -ENXIO;
1083         }
1084         return 0;
1085 }
1086
1087 static void free_stream_buffers(struct ua101 *ua, struct ua101_stream *stream)
1088 {
1089         unsigned int i;
1090
1091         for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i)
1092                 usb_free_coherent(ua->dev,
1093                                   stream->buffers[i].size,
1094                                   stream->buffers[i].addr,
1095                                   stream->buffers[i].dma);
1096 }
1097
1098 static int alloc_stream_urbs(struct ua101 *ua, struct ua101_stream *stream,
1099                              void (*urb_complete)(struct urb *))
1100 {
1101         unsigned max_packet_size = stream->max_packet_bytes;
1102         struct ua101_urb *urb;
1103         unsigned int b, u = 0;
1104
1105         for (b = 0; b < ARRAY_SIZE(stream->buffers); ++b) {
1106                 unsigned int size = stream->buffers[b].size;
1107                 u8 *addr = stream->buffers[b].addr;
1108                 dma_addr_t dma = stream->buffers[b].dma;
1109
1110                 while (size >= max_packet_size) {
1111                         if (u >= stream->queue_length)
1112                                 goto bufsize_error;
1113                         urb = kmalloc(sizeof(*urb), GFP_KERNEL);
1114                         if (!urb)
1115                                 return -ENOMEM;
1116                         usb_init_urb(&urb->urb);
1117                         urb->urb.dev = ua->dev;
1118                         urb->urb.pipe = stream->usb_pipe;
1119                         urb->urb.transfer_flags = URB_ISO_ASAP |
1120                                         URB_NO_TRANSFER_DMA_MAP;
1121                         urb->urb.transfer_buffer = addr;
1122                         urb->urb.transfer_dma = dma;
1123                         urb->urb.transfer_buffer_length = max_packet_size;
1124                         urb->urb.number_of_packets = 1;
1125                         urb->urb.interval = 1;
1126                         urb->urb.context = ua;
1127                         urb->urb.complete = urb_complete;
1128                         urb->urb.iso_frame_desc[0].offset = 0;
1129                         urb->urb.iso_frame_desc[0].length = max_packet_size;
1130                         stream->urbs[u++] = urb;
1131                         size -= max_packet_size;
1132                         addr += max_packet_size;
1133                         dma += max_packet_size;
1134                 }
1135         }
1136         if (u == stream->queue_length)
1137                 return 0;
1138 bufsize_error:
1139         dev_err(&ua->dev->dev, "internal buffer size error\n");
1140         return -ENXIO;
1141 }
1142
1143 static void free_stream_urbs(struct ua101_stream *stream)
1144 {
1145         unsigned int i;
1146
1147         for (i = 0; i < stream->queue_length; ++i)
1148                 kfree(stream->urbs[i]);
1149 }
1150
1151 static void free_usb_related_resources(struct ua101 *ua,
1152                                        struct usb_interface *interface)
1153 {
1154         unsigned int i;
1155
1156         free_stream_urbs(&ua->capture);
1157         free_stream_urbs(&ua->playback);
1158         free_stream_buffers(ua, &ua->capture);
1159         free_stream_buffers(ua, &ua->playback);
1160
1161         for (i = 0; i < ARRAY_SIZE(ua->intf); ++i)
1162                 if (ua->intf[i]) {
1163                         usb_set_intfdata(ua->intf[i], NULL);
1164                         if (ua->intf[i] != interface)
1165                                 usb_driver_release_interface(&ua101_driver,
1166                                                              ua->intf[i]);
1167                 }
1168 }
1169
1170 static void ua101_card_free(struct snd_card *card)
1171 {
1172         struct ua101 *ua = card->private_data;
1173
1174         mutex_destroy(&ua->mutex);
1175 }
1176
1177 static int ua101_probe(struct usb_interface *interface,
1178                        const struct usb_device_id *usb_id)
1179 {
1180         static const struct snd_usb_midi_endpoint_info midi_ep = {
1181                 .out_cables = 0x0001,
1182                 .in_cables = 0x0001
1183         };
1184         static const struct snd_usb_audio_quirk midi_quirk = {
1185                 .type = QUIRK_MIDI_FIXED_ENDPOINT,
1186                 .data = &midi_ep
1187         };
1188         static const int intf_numbers[2][3] = {
1189                 {       /* UA-101 */
1190                         [INTF_PLAYBACK] = 0,
1191                         [INTF_CAPTURE] = 1,
1192                         [INTF_MIDI] = 2,
1193                 },
1194                 {       /* UA-1000 */
1195                         [INTF_CAPTURE] = 1,
1196                         [INTF_PLAYBACK] = 2,
1197                         [INTF_MIDI] = 3,
1198                 },
1199         };
1200         struct snd_card *card;
1201         struct ua101 *ua;
1202         unsigned int card_index, i;
1203         int is_ua1000;
1204         const char *name;
1205         char usb_path[32];
1206         int err;
1207
1208         is_ua1000 = usb_id->idProduct == 0x0044;
1209
1210         if (interface->altsetting->desc.bInterfaceNumber !=
1211             intf_numbers[is_ua1000][0])
1212                 return -ENODEV;
1213
1214         mutex_lock(&devices_mutex);
1215
1216         for (card_index = 0; card_index < SNDRV_CARDS; ++card_index)
1217                 if (enable[card_index] && !(devices_used & (1 << card_index)))
1218                         break;
1219         if (card_index >= SNDRV_CARDS) {
1220                 mutex_unlock(&devices_mutex);
1221                 return -ENOENT;
1222         }
1223         err = snd_card_create(index[card_index], id[card_index], THIS_MODULE,
1224                               sizeof(*ua), &card);
1225         if (err < 0) {
1226                 mutex_unlock(&devices_mutex);
1227                 return err;
1228         }
1229         card->private_free = ua101_card_free;
1230         ua = card->private_data;
1231         ua->dev = interface_to_usbdev(interface);
1232         ua->card = card;
1233         ua->card_index = card_index;
1234         INIT_LIST_HEAD(&ua->midi_list);
1235         spin_lock_init(&ua->lock);
1236         mutex_init(&ua->mutex);
1237         INIT_LIST_HEAD(&ua->ready_playback_urbs);
1238         tasklet_init(&ua->playback_tasklet,
1239                      playback_tasklet, (unsigned long)ua);
1240         init_waitqueue_head(&ua->alsa_capture_wait);
1241         init_waitqueue_head(&ua->rate_feedback_wait);
1242         init_waitqueue_head(&ua->alsa_playback_wait);
1243
1244         ua->intf[0] = interface;
1245         for (i = 1; i < ARRAY_SIZE(ua->intf); ++i) {
1246                 ua->intf[i] = usb_ifnum_to_if(ua->dev,
1247                                               intf_numbers[is_ua1000][i]);
1248                 if (!ua->intf[i]) {
1249                         dev_err(&ua->dev->dev, "interface %u not found\n",
1250                                 intf_numbers[is_ua1000][i]);
1251                         err = -ENXIO;
1252                         goto probe_error;
1253                 }
1254                 err = usb_driver_claim_interface(&ua101_driver,
1255                                                  ua->intf[i], ua);
1256                 if (err < 0) {
1257                         ua->intf[i] = NULL;
1258                         err = -EBUSY;
1259                         goto probe_error;
1260                 }
1261         }
1262
1263         snd_card_set_dev(card, &interface->dev);
1264
1265         err = detect_usb_format(ua);
1266         if (err < 0)
1267                 goto probe_error;
1268
1269         name = usb_id->idProduct == 0x0044 ? "UA-1000" : "UA-101";
1270         strcpy(card->driver, "UA-101");
1271         strcpy(card->shortname, name);
1272         usb_make_path(ua->dev, usb_path, sizeof(usb_path));
1273         snprintf(ua->card->longname, sizeof(ua->card->longname),
1274                  "EDIROL %s (serial %s), %u Hz at %s, %s speed", name,
1275                  ua->dev->serial ? ua->dev->serial : "?", ua->rate, usb_path,
1276                  ua->dev->speed == USB_SPEED_HIGH ? "high" : "full");
1277
1278         err = alloc_stream_buffers(ua, &ua->capture);
1279         if (err < 0)
1280                 goto probe_error;
1281         err = alloc_stream_buffers(ua, &ua->playback);
1282         if (err < 0)
1283                 goto probe_error;
1284
1285         err = alloc_stream_urbs(ua, &ua->capture, capture_urb_complete);
1286         if (err < 0)
1287                 goto probe_error;
1288         err = alloc_stream_urbs(ua, &ua->playback, playback_urb_complete);
1289         if (err < 0)
1290                 goto probe_error;
1291
1292         err = snd_pcm_new(card, name, 0, 1, 1, &ua->pcm);
1293         if (err < 0)
1294                 goto probe_error;
1295         ua->pcm->private_data = ua;
1296         strcpy(ua->pcm->name, name);
1297         snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_pcm_ops);
1298         snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_pcm_ops);
1299
1300         err = snd_usbmidi_create(card, ua->intf[INTF_MIDI],
1301                                  &ua->midi_list, &midi_quirk);
1302         if (err < 0)
1303                 goto probe_error;
1304
1305         err = snd_card_register(card);
1306         if (err < 0)
1307                 goto probe_error;
1308
1309         usb_set_intfdata(interface, ua);
1310         devices_used |= 1 << card_index;
1311
1312         mutex_unlock(&devices_mutex);
1313         return 0;
1314
1315 probe_error:
1316         free_usb_related_resources(ua, interface);
1317         snd_card_free(card);
1318         mutex_unlock(&devices_mutex);
1319         return err;
1320 }
1321
1322 static void ua101_disconnect(struct usb_interface *interface)
1323 {
1324         struct ua101 *ua = usb_get_intfdata(interface);
1325         struct list_head *midi;
1326
1327         if (!ua)
1328                 return;
1329
1330         mutex_lock(&devices_mutex);
1331
1332         set_bit(DISCONNECTED, &ua->states);
1333         wake_up(&ua->rate_feedback_wait);
1334
1335         /* make sure that userspace cannot create new requests */
1336         snd_card_disconnect(ua->card);
1337
1338         /* make sure that there are no pending USB requests */
1339         __list_for_each(midi, &ua->midi_list)
1340                 snd_usbmidi_disconnect(midi);
1341         abort_alsa_playback(ua);
1342         abort_alsa_capture(ua);
1343         mutex_lock(&ua->mutex);
1344         stop_usb_playback(ua);
1345         stop_usb_capture(ua);
1346         mutex_unlock(&ua->mutex);
1347
1348         free_usb_related_resources(ua, interface);
1349
1350         devices_used &= ~(1 << ua->card_index);
1351
1352         snd_card_free_when_closed(ua->card);
1353
1354         mutex_unlock(&devices_mutex);
1355 }
1356
1357 static struct usb_device_id ua101_ids[] = {
1358         { USB_DEVICE(0x0582, 0x0044) }, /* UA-1000 high speed */
1359         { USB_DEVICE(0x0582, 0x007d) }, /* UA-101 high speed */
1360         { USB_DEVICE(0x0582, 0x008d) }, /* UA-101 full speed */
1361         { }
1362 };
1363 MODULE_DEVICE_TABLE(usb, ua101_ids);
1364
1365 static struct usb_driver ua101_driver = {
1366         .name = "snd-ua101",
1367         .id_table = ua101_ids,
1368         .probe = ua101_probe,
1369         .disconnect = ua101_disconnect,
1370 #if 0
1371         .suspend = ua101_suspend,
1372         .resume = ua101_resume,
1373 #endif
1374 };
1375
1376 static int __init alsa_card_ua101_init(void)
1377 {
1378         return usb_register(&ua101_driver);
1379 }
1380
1381 static void __exit alsa_card_ua101_exit(void)
1382 {
1383         usb_deregister(&ua101_driver);
1384         mutex_destroy(&devices_mutex);
1385 }
1386
1387 module_init(alsa_card_ua101_init);
1388 module_exit(alsa_card_ua101_exit);