diff options
Diffstat (limited to 'sound/usb/misc/ua101.c')
-rw-r--r-- | sound/usb/misc/ua101.c | 1387 |
1 files changed, 1387 insertions, 0 deletions
diff --git a/sound/usb/misc/ua101.c b/sound/usb/misc/ua101.c new file mode 100644 index 000000000000..e9b0ae52ca82 --- /dev/null +++ b/sound/usb/misc/ua101.c | |||
@@ -0,0 +1,1387 @@ | |||
1 | /* | ||
2 | * Edirol UA-101/UA-1000 driver | ||
3 | * Copyright (c) Clemens Ladisch <clemens@ladisch.de> | ||
4 | * | ||
5 | * This driver is free software: you can redistribute it and/or modify | ||
6 | * it under the terms of the GNU General Public License, version 2. | ||
7 | * | ||
8 | * This driver is distributed in the hope that it will be useful, | ||
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
11 | * GNU General Public License for more details. | ||
12 | * | ||
13 | * You should have received a copy of the GNU General Public License | ||
14 | * along with this driver. If not, see <http://www.gnu.org/licenses/>. | ||
15 | */ | ||
16 | |||
17 | #include <linux/init.h> | ||
18 | #include <linux/module.h> | ||
19 | #include <linux/slab.h> | ||
20 | #include <linux/usb.h> | ||
21 | #include <linux/usb/audio.h> | ||
22 | #include <sound/core.h> | ||
23 | #include <sound/initval.h> | ||
24 | #include <sound/pcm.h> | ||
25 | #include <sound/pcm_params.h> | ||
26 | #include "../usbaudio.h" | ||
27 | |||
28 | MODULE_DESCRIPTION("Edirol UA-101/1000 driver"); | ||
29 | MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); | ||
30 | MODULE_LICENSE("GPL v2"); | ||
31 | MODULE_SUPPORTED_DEVICE("{{Edirol,UA-101},{Edirol,UA-1000}}"); | ||
32 | |||
33 | /* | ||
34 | * Should not be lower than the minimum scheduling delay of the host | ||
35 | * controller. Some Intel controllers need more than one frame; as long as | ||
36 | * that driver doesn't tell us about this, use 1.5 frames just to be sure. | ||
37 | */ | ||
38 | #define MIN_QUEUE_LENGTH 12 | ||
39 | /* Somewhat random. */ | ||
40 | #define MAX_QUEUE_LENGTH 30 | ||
41 | /* | ||
42 | * This magic value optimizes memory usage efficiency for the UA-101's packet | ||
43 | * sizes at all sample rates, taking into account the stupid cache pool sizes | ||
44 | * that usb_buffer_alloc() uses. | ||
45 | */ | ||
46 | #define DEFAULT_QUEUE_LENGTH 21 | ||
47 | |||
48 | #define MAX_PACKET_SIZE 672 /* hardware specific */ | ||
49 | #define MAX_MEMORY_BUFFERS DIV_ROUND_UP(MAX_QUEUE_LENGTH, \ | ||
50 | PAGE_SIZE / MAX_PACKET_SIZE) | ||
51 | |||
52 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; | ||
53 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; | ||
54 | static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; | ||
55 | static unsigned int queue_length = 21; | ||
56 | |||
57 | module_param_array(index, int, NULL, 0444); | ||
58 | MODULE_PARM_DESC(index, "card index"); | ||
59 | module_param_array(id, charp, NULL, 0444); | ||
60 | MODULE_PARM_DESC(id, "ID string"); | ||
61 | module_param_array(enable, bool, NULL, 0444); | ||
62 | MODULE_PARM_DESC(enable, "enable card"); | ||
63 | module_param(queue_length, uint, 0644); | ||
64 | MODULE_PARM_DESC(queue_length, "USB queue length in microframes, " | ||
65 | __stringify(MIN_QUEUE_LENGTH)"-"__stringify(MAX_QUEUE_LENGTH)); | ||
66 | |||
67 | enum { | ||
68 | INTF_PLAYBACK, | ||
69 | INTF_CAPTURE, | ||
70 | INTF_MIDI, | ||
71 | |||
72 | INTF_COUNT | ||
73 | }; | ||
74 | |||
75 | /* bits in struct ua101::states */ | ||
76 | enum { | ||
77 | USB_CAPTURE_RUNNING, | ||
78 | USB_PLAYBACK_RUNNING, | ||
79 | ALSA_CAPTURE_OPEN, | ||
80 | ALSA_PLAYBACK_OPEN, | ||
81 | ALSA_CAPTURE_RUNNING, | ||
82 | ALSA_PLAYBACK_RUNNING, | ||
83 | CAPTURE_URB_COMPLETED, | ||
84 | PLAYBACK_URB_COMPLETED, | ||
85 | DISCONNECTED, | ||
86 | }; | ||
87 | |||
88 | struct ua101 { | ||
89 | struct usb_device *dev; | ||
90 | struct snd_card *card; | ||
91 | struct usb_interface *intf[INTF_COUNT]; | ||
92 | int card_index; | ||
93 | struct snd_pcm *pcm; | ||
94 | struct list_head midi_list; | ||
95 | u64 format_bit; | ||
96 | unsigned int rate; | ||
97 | unsigned int packets_per_second; | ||
98 | spinlock_t lock; | ||
99 | struct mutex mutex; | ||
100 | unsigned long states; | ||
101 | |||
102 | /* FIFO to synchronize playback rate to capture rate */ | ||
103 | unsigned int rate_feedback_start; | ||
104 | unsigned int rate_feedback_count; | ||
105 | u8 rate_feedback[MAX_QUEUE_LENGTH]; | ||
106 | |||
107 | struct list_head ready_playback_urbs; | ||
108 | struct tasklet_struct playback_tasklet; | ||
109 | wait_queue_head_t alsa_capture_wait; | ||
110 | wait_queue_head_t rate_feedback_wait; | ||
111 | wait_queue_head_t alsa_playback_wait; | ||
112 | struct ua101_stream { | ||
113 | struct snd_pcm_substream *substream; | ||
114 | unsigned int usb_pipe; | ||
115 | unsigned int channels; | ||
116 | unsigned int frame_bytes; | ||
117 | unsigned int max_packet_bytes; | ||
118 | unsigned int period_pos; | ||
119 | unsigned int buffer_pos; | ||
120 | unsigned int queue_length; | ||
121 | struct ua101_urb { | ||
122 | struct urb urb; | ||
123 | struct usb_iso_packet_descriptor iso_frame_desc[1]; | ||
124 | struct list_head ready_list; | ||
125 | } *urbs[MAX_QUEUE_LENGTH]; | ||
126 | struct { | ||
127 | unsigned int size; | ||
128 | void *addr; | ||
129 | dma_addr_t dma; | ||
130 | } buffers[MAX_MEMORY_BUFFERS]; | ||
131 | } capture, playback; | ||
132 | }; | ||
133 | |||
134 | static DEFINE_MUTEX(devices_mutex); | ||
135 | static unsigned int devices_used; | ||
136 | static struct usb_driver ua101_driver; | ||
137 | |||
138 | static void abort_alsa_playback(struct ua101 *ua); | ||
139 | static void abort_alsa_capture(struct ua101 *ua); | ||
140 | |||
141 | static const char *usb_error_string(int err) | ||
142 | { | ||
143 | switch (err) { | ||
144 | case -ENODEV: | ||
145 | return "no device"; | ||
146 | case -ENOENT: | ||
147 | return "endpoint not enabled"; | ||
148 | case -EPIPE: | ||
149 | return "endpoint stalled"; | ||
150 | case -ENOSPC: | ||
151 | return "not enough bandwidth"; | ||
152 | case -ESHUTDOWN: | ||
153 | return "device disabled"; | ||
154 | case -EHOSTUNREACH: | ||
155 | return "device suspended"; | ||
156 | case -EINVAL: | ||
157 | case -EAGAIN: | ||
158 | case -EFBIG: | ||
159 | case -EMSGSIZE: | ||
160 | return "internal error"; | ||
161 | default: | ||
162 | return "unknown error"; | ||
163 | } | ||
164 | } | ||
165 | |||
166 | static void abort_usb_capture(struct ua101 *ua) | ||
167 | { | ||
168 | if (test_and_clear_bit(USB_CAPTURE_RUNNING, &ua->states)) { | ||
169 | wake_up(&ua->alsa_capture_wait); | ||
170 | wake_up(&ua->rate_feedback_wait); | ||
171 | } | ||
172 | } | ||
173 | |||
174 | static void abort_usb_playback(struct ua101 *ua) | ||
175 | { | ||
176 | if (test_and_clear_bit(USB_PLAYBACK_RUNNING, &ua->states)) | ||
177 | wake_up(&ua->alsa_playback_wait); | ||
178 | } | ||
179 | |||
180 | static void playback_urb_complete(struct urb *usb_urb) | ||
181 | { | ||
182 | struct ua101_urb *urb = (struct ua101_urb *)usb_urb; | ||
183 | struct ua101 *ua = urb->urb.context; | ||
184 | unsigned long flags; | ||
185 | |||
186 | if (unlikely(urb->urb.status == -ENOENT || /* unlinked */ | ||
187 | urb->urb.status == -ENODEV || /* device removed */ | ||
188 | urb->urb.status == -ECONNRESET || /* unlinked */ | ||
189 | urb->urb.status == -ESHUTDOWN)) { /* device disabled */ | ||
190 | abort_usb_playback(ua); | ||
191 | abort_alsa_playback(ua); | ||
192 | return; | ||
193 | } | ||
194 | |||
195 | if (test_bit(USB_PLAYBACK_RUNNING, &ua->states)) { | ||
196 | /* append URB to FIFO */ | ||
197 | spin_lock_irqsave(&ua->lock, flags); | ||
198 | list_add_tail(&urb->ready_list, &ua->ready_playback_urbs); | ||
199 | if (ua->rate_feedback_count > 0) | ||
200 | tasklet_schedule(&ua->playback_tasklet); | ||
201 | ua->playback.substream->runtime->delay -= | ||
202 | urb->urb.iso_frame_desc[0].length / | ||
203 | ua->playback.frame_bytes; | ||
204 | spin_unlock_irqrestore(&ua->lock, flags); | ||
205 | } | ||
206 | } | ||
207 | |||
208 | static void first_playback_urb_complete(struct urb *urb) | ||
209 | { | ||
210 | struct ua101 *ua = urb->context; | ||
211 | |||
212 | urb->complete = playback_urb_complete; | ||
213 | playback_urb_complete(urb); | ||
214 | |||
215 | set_bit(PLAYBACK_URB_COMPLETED, &ua->states); | ||
216 | wake_up(&ua->alsa_playback_wait); | ||
217 | } | ||
218 | |||
219 | /* copy data from the ALSA ring buffer into the URB buffer */ | ||
220 | static bool copy_playback_data(struct ua101_stream *stream, struct urb *urb, | ||
221 | unsigned int frames) | ||
222 | { | ||
223 | struct snd_pcm_runtime *runtime; | ||
224 | unsigned int frame_bytes, frames1; | ||
225 | const u8 *source; | ||
226 | |||
227 | runtime = stream->substream->runtime; | ||
228 | frame_bytes = stream->frame_bytes; | ||
229 | source = runtime->dma_area + stream->buffer_pos * frame_bytes; | ||
230 | if (stream->buffer_pos + frames <= runtime->buffer_size) { | ||
231 | memcpy(urb->transfer_buffer, source, frames * frame_bytes); | ||
232 | } else { | ||
233 | /* wrap around at end of ring buffer */ | ||
234 | frames1 = runtime->buffer_size - stream->buffer_pos; | ||
235 | memcpy(urb->transfer_buffer, source, frames1 * frame_bytes); | ||
236 | memcpy(urb->transfer_buffer + frames1 * frame_bytes, | ||
237 | runtime->dma_area, (frames - frames1) * frame_bytes); | ||
238 | } | ||
239 | |||
240 | stream->buffer_pos += frames; | ||
241 | if (stream->buffer_pos >= runtime->buffer_size) | ||
242 | stream->buffer_pos -= runtime->buffer_size; | ||
243 | stream->period_pos += frames; | ||
244 | if (stream->period_pos >= runtime->period_size) { | ||
245 | stream->period_pos -= runtime->period_size; | ||
246 | return true; | ||
247 | } | ||
248 | return false; | ||
249 | } | ||
250 | |||
251 | static inline void add_with_wraparound(struct ua101 *ua, | ||
252 | unsigned int *value, unsigned int add) | ||
253 | { | ||
254 | *value += add; | ||
255 | if (*value >= ua->playback.queue_length) | ||
256 | *value -= ua->playback.queue_length; | ||
257 | } | ||
258 | |||
259 | static void playback_tasklet(unsigned long data) | ||
260 | { | ||
261 | struct ua101 *ua = (void *)data; | ||
262 | unsigned long flags; | ||
263 | unsigned int frames; | ||
264 | struct ua101_urb *urb; | ||
265 | bool do_period_elapsed = false; | ||
266 | int err; | ||
267 | |||
268 | if (unlikely(!test_bit(USB_PLAYBACK_RUNNING, &ua->states))) | ||
269 | return; | ||
270 | |||
271 | /* | ||
272 | * Synchronizing the playback rate to the capture rate is done by using | ||
273 | * the same sequence of packet sizes for both streams. | ||
274 | * Submitting a playback URB therefore requires both a ready URB and | ||
275 | * the size of the corresponding capture packet, i.e., both playback | ||
276 | * and capture URBs must have been completed. Since the USB core does | ||
277 | * not guarantee that playback and capture complete callbacks are | ||
278 | * called alternately, we use two FIFOs for packet sizes and read URBs; | ||
279 | * submitting playback URBs is possible as long as both FIFOs are | ||
280 | * nonempty. | ||
281 | */ | ||
282 | spin_lock_irqsave(&ua->lock, flags); | ||
283 | while (ua->rate_feedback_count > 0 && | ||
284 | !list_empty(&ua->ready_playback_urbs)) { | ||
285 | /* take packet size out of FIFO */ | ||
286 | frames = ua->rate_feedback[ua->rate_feedback_start]; | ||
287 | add_with_wraparound(ua, &ua->rate_feedback_start, 1); | ||
288 | ua->rate_feedback_count--; | ||
289 | |||
290 | /* take URB out of FIFO */ | ||
291 | urb = list_first_entry(&ua->ready_playback_urbs, | ||
292 | struct ua101_urb, ready_list); | ||
293 | list_del(&urb->ready_list); | ||
294 | |||
295 | /* fill packet with data or silence */ | ||
296 | urb->urb.iso_frame_desc[0].length = | ||
297 | frames * ua->playback.frame_bytes; | ||
298 | if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states)) | ||
299 | do_period_elapsed |= copy_playback_data(&ua->playback, | ||
300 | &urb->urb, | ||
301 | frames); | ||
302 | else | ||
303 | memset(urb->urb.transfer_buffer, 0, | ||
304 | urb->urb.iso_frame_desc[0].length); | ||
305 | |||
306 | /* and off you go ... */ | ||
307 | err = usb_submit_urb(&urb->urb, GFP_ATOMIC); | ||
308 | if (unlikely(err < 0)) { | ||
309 | spin_unlock_irqrestore(&ua->lock, flags); | ||
310 | abort_usb_playback(ua); | ||
311 | abort_alsa_playback(ua); | ||
312 | dev_err(&ua->dev->dev, "USB request error %d: %s\n", | ||
313 | err, usb_error_string(err)); | ||
314 | return; | ||
315 | } | ||
316 | ua->playback.substream->runtime->delay += frames; | ||
317 | } | ||
318 | spin_unlock_irqrestore(&ua->lock, flags); | ||
319 | if (do_period_elapsed) | ||
320 | snd_pcm_period_elapsed(ua->playback.substream); | ||
321 | } | ||
322 | |||
323 | /* copy data from the URB buffer into the ALSA ring buffer */ | ||
324 | static bool copy_capture_data(struct ua101_stream *stream, struct urb *urb, | ||
325 | unsigned int frames) | ||
326 | { | ||
327 | struct snd_pcm_runtime *runtime; | ||
328 | unsigned int frame_bytes, frames1; | ||
329 | u8 *dest; | ||
330 | |||
331 | runtime = stream->substream->runtime; | ||
332 | frame_bytes = stream->frame_bytes; | ||
333 | dest = runtime->dma_area + stream->buffer_pos * frame_bytes; | ||
334 | if (stream->buffer_pos + frames <= runtime->buffer_size) { | ||
335 | memcpy(dest, urb->transfer_buffer, frames * frame_bytes); | ||
336 | } else { | ||
337 | /* wrap around at end of ring buffer */ | ||
338 | frames1 = runtime->buffer_size - stream->buffer_pos; | ||
339 | memcpy(dest, urb->transfer_buffer, frames1 * frame_bytes); | ||
340 | memcpy(runtime->dma_area, | ||
341 | urb->transfer_buffer + frames1 * frame_bytes, | ||
342 | (frames - frames1) * frame_bytes); | ||
343 | } | ||
344 | |||
345 | stream->buffer_pos += frames; | ||
346 | if (stream->buffer_pos >= runtime->buffer_size) | ||
347 | stream->buffer_pos -= runtime->buffer_size; | ||
348 | stream->period_pos += frames; | ||
349 | if (stream->period_pos >= runtime->period_size) { | ||
350 | stream->period_pos -= runtime->period_size; | ||
351 | return true; | ||
352 | } | ||
353 | return false; | ||
354 | } | ||
355 | |||
356 | static void capture_urb_complete(struct urb *urb) | ||
357 | { | ||
358 | struct ua101 *ua = urb->context; | ||
359 | struct ua101_stream *stream = &ua->capture; | ||
360 | unsigned long flags; | ||
361 | unsigned int frames, write_ptr; | ||
362 | bool do_period_elapsed; | ||
363 | int err; | ||
364 | |||
365 | if (unlikely(urb->status == -ENOENT || /* unlinked */ | ||
366 | urb->status == -ENODEV || /* device removed */ | ||
367 | urb->status == -ECONNRESET || /* unlinked */ | ||
368 | urb->status == -ESHUTDOWN)) /* device disabled */ | ||
369 | goto stream_stopped; | ||
370 | |||
371 | if (urb->status >= 0 && urb->iso_frame_desc[0].status >= 0) | ||
372 | frames = urb->iso_frame_desc[0].actual_length / | ||
373 | stream->frame_bytes; | ||
374 | else | ||
375 | frames = 0; | ||
376 | |||
377 | spin_lock_irqsave(&ua->lock, flags); | ||
378 | |||
379 | if (frames > 0 && test_bit(ALSA_CAPTURE_RUNNING, &ua->states)) | ||
380 | do_period_elapsed = copy_capture_data(stream, urb, frames); | ||
381 | else | ||
382 | do_period_elapsed = false; | ||
383 | |||
384 | if (test_bit(USB_CAPTURE_RUNNING, &ua->states)) { | ||
385 | err = usb_submit_urb(urb, GFP_ATOMIC); | ||
386 | if (unlikely(err < 0)) { | ||
387 | spin_unlock_irqrestore(&ua->lock, flags); | ||
388 | dev_err(&ua->dev->dev, "USB request error %d: %s\n", | ||
389 | err, usb_error_string(err)); | ||
390 | goto stream_stopped; | ||
391 | } | ||
392 | |||
393 | /* append packet size to FIFO */ | ||
394 | write_ptr = ua->rate_feedback_start; | ||
395 | add_with_wraparound(ua, &write_ptr, ua->rate_feedback_count); | ||
396 | ua->rate_feedback[write_ptr] = frames; | ||
397 | if (ua->rate_feedback_count < ua->playback.queue_length) { | ||
398 | ua->rate_feedback_count++; | ||
399 | if (ua->rate_feedback_count == | ||
400 | ua->playback.queue_length) | ||
401 | wake_up(&ua->rate_feedback_wait); | ||
402 | } else { | ||
403 | /* | ||
404 | * Ring buffer overflow; this happens when the playback | ||
405 | * stream is not running. Throw away the oldest entry, | ||
406 | * so that the playback stream, when it starts, sees | ||
407 | * the most recent packet sizes. | ||
408 | */ | ||
409 | add_with_wraparound(ua, &ua->rate_feedback_start, 1); | ||
410 | } | ||
411 | if (test_bit(USB_PLAYBACK_RUNNING, &ua->states) && | ||
412 | !list_empty(&ua->ready_playback_urbs)) | ||
413 | tasklet_schedule(&ua->playback_tasklet); | ||
414 | } | ||
415 | |||
416 | spin_unlock_irqrestore(&ua->lock, flags); | ||
417 | |||
418 | if (do_period_elapsed) | ||
419 | snd_pcm_period_elapsed(stream->substream); | ||
420 | |||
421 | return; | ||
422 | |||
423 | stream_stopped: | ||
424 | abort_usb_playback(ua); | ||
425 | abort_usb_capture(ua); | ||
426 | abort_alsa_playback(ua); | ||
427 | abort_alsa_capture(ua); | ||
428 | } | ||
429 | |||
430 | static void first_capture_urb_complete(struct urb *urb) | ||
431 | { | ||
432 | struct ua101 *ua = urb->context; | ||
433 | |||
434 | urb->complete = capture_urb_complete; | ||
435 | capture_urb_complete(urb); | ||
436 | |||
437 | set_bit(CAPTURE_URB_COMPLETED, &ua->states); | ||
438 | wake_up(&ua->alsa_capture_wait); | ||
439 | } | ||
440 | |||
441 | static int submit_stream_urbs(struct ua101 *ua, struct ua101_stream *stream) | ||
442 | { | ||
443 | unsigned int i; | ||
444 | |||
445 | for (i = 0; i < stream->queue_length; ++i) { | ||
446 | int err = usb_submit_urb(&stream->urbs[i]->urb, GFP_KERNEL); | ||
447 | if (err < 0) { | ||
448 | dev_err(&ua->dev->dev, "USB request error %d: %s\n", | ||
449 | err, usb_error_string(err)); | ||
450 | return err; | ||
451 | } | ||
452 | } | ||
453 | return 0; | ||
454 | } | ||
455 | |||
456 | static void kill_stream_urbs(struct ua101_stream *stream) | ||
457 | { | ||
458 | unsigned int i; | ||
459 | |||
460 | for (i = 0; i < stream->queue_length; ++i) | ||
461 | usb_kill_urb(&stream->urbs[i]->urb); | ||
462 | } | ||
463 | |||
464 | static int enable_iso_interface(struct ua101 *ua, unsigned int intf_index) | ||
465 | { | ||
466 | struct usb_host_interface *alts; | ||
467 | |||
468 | alts = ua->intf[intf_index]->cur_altsetting; | ||
469 | if (alts->desc.bAlternateSetting != 1) { | ||
470 | int err = usb_set_interface(ua->dev, | ||
471 | alts->desc.bInterfaceNumber, 1); | ||
472 | if (err < 0) { | ||
473 | dev_err(&ua->dev->dev, | ||
474 | "cannot initialize interface; error %d: %s\n", | ||
475 | err, usb_error_string(err)); | ||
476 | return err; | ||
477 | } | ||
478 | } | ||
479 | return 0; | ||
480 | } | ||
481 | |||
482 | static void disable_iso_interface(struct ua101 *ua, unsigned int intf_index) | ||
483 | { | ||
484 | struct usb_host_interface *alts; | ||
485 | |||
486 | alts = ua->intf[intf_index]->cur_altsetting; | ||
487 | if (alts->desc.bAlternateSetting != 0) { | ||
488 | int err = usb_set_interface(ua->dev, | ||
489 | alts->desc.bInterfaceNumber, 0); | ||
490 | if (err < 0 && !test_bit(DISCONNECTED, &ua->states)) | ||
491 | dev_warn(&ua->dev->dev, | ||
492 | "interface reset failed; error %d: %s\n", | ||
493 | err, usb_error_string(err)); | ||
494 | } | ||
495 | } | ||
496 | |||
497 | static void stop_usb_capture(struct ua101 *ua) | ||
498 | { | ||
499 | clear_bit(USB_CAPTURE_RUNNING, &ua->states); | ||
500 | |||
501 | kill_stream_urbs(&ua->capture); | ||
502 | |||
503 | disable_iso_interface(ua, INTF_CAPTURE); | ||
504 | } | ||
505 | |||
506 | static int start_usb_capture(struct ua101 *ua) | ||
507 | { | ||
508 | int err; | ||
509 | |||
510 | if (test_bit(DISCONNECTED, &ua->states)) | ||
511 | return -ENODEV; | ||
512 | |||
513 | if (test_bit(USB_CAPTURE_RUNNING, &ua->states)) | ||
514 | return 0; | ||
515 | |||
516 | kill_stream_urbs(&ua->capture); | ||
517 | |||
518 | err = enable_iso_interface(ua, INTF_CAPTURE); | ||
519 | if (err < 0) | ||
520 | return err; | ||
521 | |||
522 | clear_bit(CAPTURE_URB_COMPLETED, &ua->states); | ||
523 | ua->capture.urbs[0]->urb.complete = first_capture_urb_complete; | ||
524 | ua->rate_feedback_start = 0; | ||
525 | ua->rate_feedback_count = 0; | ||
526 | |||
527 | set_bit(USB_CAPTURE_RUNNING, &ua->states); | ||
528 | err = submit_stream_urbs(ua, &ua->capture); | ||
529 | if (err < 0) | ||
530 | stop_usb_capture(ua); | ||
531 | return err; | ||
532 | } | ||
533 | |||
534 | static void stop_usb_playback(struct ua101 *ua) | ||
535 | { | ||
536 | clear_bit(USB_PLAYBACK_RUNNING, &ua->states); | ||
537 | |||
538 | kill_stream_urbs(&ua->playback); | ||
539 | |||
540 | tasklet_kill(&ua->playback_tasklet); | ||
541 | |||
542 | disable_iso_interface(ua, INTF_PLAYBACK); | ||
543 | } | ||
544 | |||
545 | static int start_usb_playback(struct ua101 *ua) | ||
546 | { | ||
547 | unsigned int i, frames; | ||
548 | struct urb *urb; | ||
549 | int err = 0; | ||
550 | |||
551 | if (test_bit(DISCONNECTED, &ua->states)) | ||
552 | return -ENODEV; | ||
553 | |||
554 | if (test_bit(USB_PLAYBACK_RUNNING, &ua->states)) | ||
555 | return 0; | ||
556 | |||
557 | kill_stream_urbs(&ua->playback); | ||
558 | tasklet_kill(&ua->playback_tasklet); | ||
559 | |||
560 | err = enable_iso_interface(ua, INTF_PLAYBACK); | ||
561 | if (err < 0) | ||
562 | return err; | ||
563 | |||
564 | clear_bit(PLAYBACK_URB_COMPLETED, &ua->states); | ||
565 | ua->playback.urbs[0]->urb.complete = | ||
566 | first_playback_urb_complete; | ||
567 | spin_lock_irq(&ua->lock); | ||
568 | INIT_LIST_HEAD(&ua->ready_playback_urbs); | ||
569 | spin_unlock_irq(&ua->lock); | ||
570 | |||
571 | /* | ||
572 | * We submit the initial URBs all at once, so we have to wait for the | ||
573 | * packet size FIFO to be full. | ||
574 | */ | ||
575 | wait_event(ua->rate_feedback_wait, | ||
576 | ua->rate_feedback_count >= ua->playback.queue_length || | ||
577 | !test_bit(USB_CAPTURE_RUNNING, &ua->states) || | ||
578 | test_bit(DISCONNECTED, &ua->states)); | ||
579 | if (test_bit(DISCONNECTED, &ua->states)) { | ||
580 | stop_usb_playback(ua); | ||
581 | return -ENODEV; | ||
582 | } | ||
583 | if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) { | ||
584 | stop_usb_playback(ua); | ||
585 | return -EIO; | ||
586 | } | ||
587 | |||
588 | for (i = 0; i < ua->playback.queue_length; ++i) { | ||
589 | /* all initial URBs contain silence */ | ||
590 | spin_lock_irq(&ua->lock); | ||
591 | frames = ua->rate_feedback[ua->rate_feedback_start]; | ||
592 | add_with_wraparound(ua, &ua->rate_feedback_start, 1); | ||
593 | ua->rate_feedback_count--; | ||
594 | spin_unlock_irq(&ua->lock); | ||
595 | urb = &ua->playback.urbs[i]->urb; | ||
596 | urb->iso_frame_desc[0].length = | ||
597 | frames * ua->playback.frame_bytes; | ||
598 | memset(urb->transfer_buffer, 0, | ||
599 | urb->iso_frame_desc[0].length); | ||
600 | } | ||
601 | |||
602 | set_bit(USB_PLAYBACK_RUNNING, &ua->states); | ||
603 | err = submit_stream_urbs(ua, &ua->playback); | ||
604 | if (err < 0) | ||
605 | stop_usb_playback(ua); | ||
606 | return err; | ||
607 | } | ||
608 | |||
609 | static void abort_alsa_capture(struct ua101 *ua) | ||
610 | { | ||
611 | if (test_bit(ALSA_CAPTURE_RUNNING, &ua->states)) | ||
612 | snd_pcm_stop(ua->capture.substream, SNDRV_PCM_STATE_XRUN); | ||
613 | } | ||
614 | |||
615 | static void abort_alsa_playback(struct ua101 *ua) | ||
616 | { | ||
617 | if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states)) | ||
618 | snd_pcm_stop(ua->playback.substream, SNDRV_PCM_STATE_XRUN); | ||
619 | } | ||
620 | |||
621 | static int set_stream_hw(struct ua101 *ua, struct snd_pcm_substream *substream, | ||
622 | unsigned int channels) | ||
623 | { | ||
624 | int err; | ||
625 | |||
626 | substream->runtime->hw.info = | ||
627 | SNDRV_PCM_INFO_MMAP | | ||
628 | SNDRV_PCM_INFO_MMAP_VALID | | ||
629 | SNDRV_PCM_INFO_BATCH | | ||
630 | SNDRV_PCM_INFO_INTERLEAVED | | ||
631 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | ||
632 | SNDRV_PCM_INFO_FIFO_IN_FRAMES; | ||
633 | substream->runtime->hw.formats = ua->format_bit; | ||
634 | substream->runtime->hw.rates = snd_pcm_rate_to_rate_bit(ua->rate); | ||
635 | substream->runtime->hw.rate_min = ua->rate; | ||
636 | substream->runtime->hw.rate_max = ua->rate; | ||
637 | substream->runtime->hw.channels_min = channels; | ||
638 | substream->runtime->hw.channels_max = channels; | ||
639 | substream->runtime->hw.buffer_bytes_max = 45000 * 1024; | ||
640 | substream->runtime->hw.period_bytes_min = 1; | ||
641 | substream->runtime->hw.period_bytes_max = UINT_MAX; | ||
642 | substream->runtime->hw.periods_min = 2; | ||
643 | substream->runtime->hw.periods_max = UINT_MAX; | ||
644 | err = snd_pcm_hw_constraint_minmax(substream->runtime, | ||
645 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | ||
646 | 1500000 / ua->packets_per_second, | ||
647 | 8192000); | ||
648 | if (err < 0) | ||
649 | return err; | ||
650 | err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24); | ||
651 | return err; | ||
652 | } | ||
653 | |||
654 | static int capture_pcm_open(struct snd_pcm_substream *substream) | ||
655 | { | ||
656 | struct ua101 *ua = substream->private_data; | ||
657 | int err; | ||
658 | |||
659 | ua->capture.substream = substream; | ||
660 | err = set_stream_hw(ua, substream, ua->capture.channels); | ||
661 | if (err < 0) | ||
662 | return err; | ||
663 | substream->runtime->hw.fifo_size = | ||
664 | DIV_ROUND_CLOSEST(ua->rate, ua->packets_per_second); | ||
665 | substream->runtime->delay = substream->runtime->hw.fifo_size; | ||
666 | |||
667 | mutex_lock(&ua->mutex); | ||
668 | err = start_usb_capture(ua); | ||
669 | if (err >= 0) | ||
670 | set_bit(ALSA_CAPTURE_OPEN, &ua->states); | ||
671 | mutex_unlock(&ua->mutex); | ||
672 | return err; | ||
673 | } | ||
674 | |||
675 | static int playback_pcm_open(struct snd_pcm_substream *substream) | ||
676 | { | ||
677 | struct ua101 *ua = substream->private_data; | ||
678 | int err; | ||
679 | |||
680 | ua->playback.substream = substream; | ||
681 | err = set_stream_hw(ua, substream, ua->playback.channels); | ||
682 | if (err < 0) | ||
683 | return err; | ||
684 | substream->runtime->hw.fifo_size = | ||
685 | DIV_ROUND_CLOSEST(ua->rate * ua->playback.queue_length, | ||
686 | ua->packets_per_second); | ||
687 | |||
688 | mutex_lock(&ua->mutex); | ||
689 | err = start_usb_capture(ua); | ||
690 | if (err < 0) | ||
691 | goto error; | ||
692 | err = start_usb_playback(ua); | ||
693 | if (err < 0) { | ||
694 | if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states)) | ||
695 | stop_usb_capture(ua); | ||
696 | goto error; | ||
697 | } | ||
698 | set_bit(ALSA_PLAYBACK_OPEN, &ua->states); | ||
699 | error: | ||
700 | mutex_unlock(&ua->mutex); | ||
701 | return err; | ||
702 | } | ||
703 | |||
704 | static int capture_pcm_close(struct snd_pcm_substream *substream) | ||
705 | { | ||
706 | struct ua101 *ua = substream->private_data; | ||
707 | |||
708 | mutex_lock(&ua->mutex); | ||
709 | clear_bit(ALSA_CAPTURE_OPEN, &ua->states); | ||
710 | if (!test_bit(ALSA_PLAYBACK_OPEN, &ua->states)) | ||
711 | stop_usb_capture(ua); | ||
712 | mutex_unlock(&ua->mutex); | ||
713 | return 0; | ||
714 | } | ||
715 | |||
716 | static int playback_pcm_close(struct snd_pcm_substream *substream) | ||
717 | { | ||
718 | struct ua101 *ua = substream->private_data; | ||
719 | |||
720 | mutex_lock(&ua->mutex); | ||
721 | stop_usb_playback(ua); | ||
722 | clear_bit(ALSA_PLAYBACK_OPEN, &ua->states); | ||
723 | if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states)) | ||
724 | stop_usb_capture(ua); | ||
725 | mutex_unlock(&ua->mutex); | ||
726 | return 0; | ||
727 | } | ||
728 | |||
729 | static int capture_pcm_hw_params(struct snd_pcm_substream *substream, | ||
730 | struct snd_pcm_hw_params *hw_params) | ||
731 | { | ||
732 | struct ua101 *ua = substream->private_data; | ||
733 | int err; | ||
734 | |||
735 | mutex_lock(&ua->mutex); | ||
736 | err = start_usb_capture(ua); | ||
737 | mutex_unlock(&ua->mutex); | ||
738 | if (err < 0) | ||
739 | return err; | ||
740 | |||
741 | return snd_pcm_lib_alloc_vmalloc_buffer(substream, | ||
742 | params_buffer_bytes(hw_params)); | ||
743 | } | ||
744 | |||
745 | static int playback_pcm_hw_params(struct snd_pcm_substream *substream, | ||
746 | struct snd_pcm_hw_params *hw_params) | ||
747 | { | ||
748 | struct ua101 *ua = substream->private_data; | ||
749 | int err; | ||
750 | |||
751 | mutex_lock(&ua->mutex); | ||
752 | err = start_usb_capture(ua); | ||
753 | if (err >= 0) | ||
754 | err = start_usb_playback(ua); | ||
755 | mutex_unlock(&ua->mutex); | ||
756 | if (err < 0) | ||
757 | return err; | ||
758 | |||
759 | return snd_pcm_lib_alloc_vmalloc_buffer(substream, | ||
760 | params_buffer_bytes(hw_params)); | ||
761 | } | ||
762 | |||
763 | static int ua101_pcm_hw_free(struct snd_pcm_substream *substream) | ||
764 | { | ||
765 | return snd_pcm_lib_free_vmalloc_buffer(substream); | ||
766 | } | ||
767 | |||
768 | static int capture_pcm_prepare(struct snd_pcm_substream *substream) | ||
769 | { | ||
770 | struct ua101 *ua = substream->private_data; | ||
771 | int err; | ||
772 | |||
773 | mutex_lock(&ua->mutex); | ||
774 | err = start_usb_capture(ua); | ||
775 | mutex_unlock(&ua->mutex); | ||
776 | if (err < 0) | ||
777 | return err; | ||
778 | |||
779 | /* | ||
780 | * The EHCI driver schedules the first packet of an iso stream at 10 ms | ||
781 | * in the future, i.e., no data is actually captured for that long. | ||
782 | * Take the wait here so that the stream is known to be actually | ||
783 | * running when the start trigger has been called. | ||
784 | */ | ||
785 | wait_event(ua->alsa_capture_wait, | ||
786 | test_bit(CAPTURE_URB_COMPLETED, &ua->states) || | ||
787 | !test_bit(USB_CAPTURE_RUNNING, &ua->states)); | ||
788 | if (test_bit(DISCONNECTED, &ua->states)) | ||
789 | return -ENODEV; | ||
790 | if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) | ||
791 | return -EIO; | ||
792 | |||
793 | ua->capture.period_pos = 0; | ||
794 | ua->capture.buffer_pos = 0; | ||
795 | return 0; | ||
796 | } | ||
797 | |||
798 | static int playback_pcm_prepare(struct snd_pcm_substream *substream) | ||
799 | { | ||
800 | struct ua101 *ua = substream->private_data; | ||
801 | int err; | ||
802 | |||
803 | mutex_lock(&ua->mutex); | ||
804 | err = start_usb_capture(ua); | ||
805 | if (err >= 0) | ||
806 | err = start_usb_playback(ua); | ||
807 | mutex_unlock(&ua->mutex); | ||
808 | if (err < 0) | ||
809 | return err; | ||
810 | |||
811 | /* see the comment in capture_pcm_prepare() */ | ||
812 | wait_event(ua->alsa_playback_wait, | ||
813 | test_bit(PLAYBACK_URB_COMPLETED, &ua->states) || | ||
814 | !test_bit(USB_PLAYBACK_RUNNING, &ua->states)); | ||
815 | if (test_bit(DISCONNECTED, &ua->states)) | ||
816 | return -ENODEV; | ||
817 | if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states)) | ||
818 | return -EIO; | ||
819 | |||
820 | substream->runtime->delay = 0; | ||
821 | ua->playback.period_pos = 0; | ||
822 | ua->playback.buffer_pos = 0; | ||
823 | return 0; | ||
824 | } | ||
825 | |||
826 | static int capture_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | ||
827 | { | ||
828 | struct ua101 *ua = substream->private_data; | ||
829 | |||
830 | switch (cmd) { | ||
831 | case SNDRV_PCM_TRIGGER_START: | ||
832 | if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) | ||
833 | return -EIO; | ||
834 | set_bit(ALSA_CAPTURE_RUNNING, &ua->states); | ||
835 | return 0; | ||
836 | case SNDRV_PCM_TRIGGER_STOP: | ||
837 | clear_bit(ALSA_CAPTURE_RUNNING, &ua->states); | ||
838 | return 0; | ||
839 | default: | ||
840 | return -EINVAL; | ||
841 | } | ||
842 | } | ||
843 | |||
844 | static int playback_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | ||
845 | { | ||
846 | struct ua101 *ua = substream->private_data; | ||
847 | |||
848 | switch (cmd) { | ||
849 | case SNDRV_PCM_TRIGGER_START: | ||
850 | if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states)) | ||
851 | return -EIO; | ||
852 | set_bit(ALSA_PLAYBACK_RUNNING, &ua->states); | ||
853 | return 0; | ||
854 | case SNDRV_PCM_TRIGGER_STOP: | ||
855 | clear_bit(ALSA_PLAYBACK_RUNNING, &ua->states); | ||
856 | return 0; | ||
857 | default: | ||
858 | return -EINVAL; | ||
859 | } | ||
860 | } | ||
861 | |||
862 | static inline snd_pcm_uframes_t ua101_pcm_pointer(struct ua101 *ua, | ||
863 | struct ua101_stream *stream) | ||
864 | { | ||
865 | unsigned long flags; | ||
866 | unsigned int pos; | ||
867 | |||
868 | spin_lock_irqsave(&ua->lock, flags); | ||
869 | pos = stream->buffer_pos; | ||
870 | spin_unlock_irqrestore(&ua->lock, flags); | ||
871 | return pos; | ||
872 | } | ||
873 | |||
874 | static snd_pcm_uframes_t capture_pcm_pointer(struct snd_pcm_substream *subs) | ||
875 | { | ||
876 | struct ua101 *ua = subs->private_data; | ||
877 | |||
878 | return ua101_pcm_pointer(ua, &ua->capture); | ||
879 | } | ||
880 | |||
881 | static snd_pcm_uframes_t playback_pcm_pointer(struct snd_pcm_substream *subs) | ||
882 | { | ||
883 | struct ua101 *ua = subs->private_data; | ||
884 | |||
885 | return ua101_pcm_pointer(ua, &ua->playback); | ||
886 | } | ||
887 | |||
888 | static struct snd_pcm_ops capture_pcm_ops = { | ||
889 | .open = capture_pcm_open, | ||
890 | .close = capture_pcm_close, | ||
891 | .ioctl = snd_pcm_lib_ioctl, | ||
892 | .hw_params = capture_pcm_hw_params, | ||
893 | .hw_free = ua101_pcm_hw_free, | ||
894 | .prepare = capture_pcm_prepare, | ||
895 | .trigger = capture_pcm_trigger, | ||
896 | .pointer = capture_pcm_pointer, | ||
897 | .page = snd_pcm_lib_get_vmalloc_page, | ||
898 | .mmap = snd_pcm_lib_mmap_vmalloc, | ||
899 | }; | ||
900 | |||
901 | static struct snd_pcm_ops playback_pcm_ops = { | ||
902 | .open = playback_pcm_open, | ||
903 | .close = playback_pcm_close, | ||
904 | .ioctl = snd_pcm_lib_ioctl, | ||
905 | .hw_params = playback_pcm_hw_params, | ||
906 | .hw_free = ua101_pcm_hw_free, | ||
907 | .prepare = playback_pcm_prepare, | ||
908 | .trigger = playback_pcm_trigger, | ||
909 | .pointer = playback_pcm_pointer, | ||
910 | .page = snd_pcm_lib_get_vmalloc_page, | ||
911 | .mmap = snd_pcm_lib_mmap_vmalloc, | ||
912 | }; | ||
913 | |||
914 | static const struct uac_format_type_i_discrete_descriptor * | ||
915 | find_format_descriptor(struct usb_interface *interface) | ||
916 | { | ||
917 | struct usb_host_interface *alt; | ||
918 | u8 *extra; | ||
919 | int extralen; | ||
920 | |||
921 | if (interface->num_altsetting != 2) { | ||
922 | dev_err(&interface->dev, "invalid num_altsetting\n"); | ||
923 | return NULL; | ||
924 | } | ||
925 | |||
926 | alt = &interface->altsetting[0]; | ||
927 | if (alt->desc.bNumEndpoints != 0) { | ||
928 | dev_err(&interface->dev, "invalid bNumEndpoints\n"); | ||
929 | return NULL; | ||
930 | } | ||
931 | |||
932 | alt = &interface->altsetting[1]; | ||
933 | if (alt->desc.bNumEndpoints != 1) { | ||
934 | dev_err(&interface->dev, "invalid bNumEndpoints\n"); | ||
935 | return NULL; | ||
936 | } | ||
937 | |||
938 | extra = alt->extra; | ||
939 | extralen = alt->extralen; | ||
940 | while (extralen >= sizeof(struct usb_descriptor_header)) { | ||
941 | struct uac_format_type_i_discrete_descriptor *desc; | ||
942 | |||
943 | desc = (struct uac_format_type_i_discrete_descriptor *)extra; | ||
944 | if (desc->bLength > extralen) { | ||
945 | dev_err(&interface->dev, "descriptor overflow\n"); | ||
946 | return NULL; | ||
947 | } | ||
948 | if (desc->bLength == UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1) && | ||
949 | desc->bDescriptorType == USB_DT_CS_INTERFACE && | ||
950 | desc->bDescriptorSubtype == UAC_FORMAT_TYPE) { | ||
951 | if (desc->bFormatType != UAC_FORMAT_TYPE_I_PCM || | ||
952 | desc->bSamFreqType != 1) { | ||
953 | dev_err(&interface->dev, | ||
954 | "invalid format type\n"); | ||
955 | return NULL; | ||
956 | } | ||
957 | return desc; | ||
958 | } | ||
959 | extralen -= desc->bLength; | ||
960 | extra += desc->bLength; | ||
961 | } | ||
962 | dev_err(&interface->dev, "sample format descriptor not found\n"); | ||
963 | return NULL; | ||
964 | } | ||
965 | |||
966 | static int detect_usb_format(struct ua101 *ua) | ||
967 | { | ||
968 | const struct uac_format_type_i_discrete_descriptor *fmt_capture; | ||
969 | const struct uac_format_type_i_discrete_descriptor *fmt_playback; | ||
970 | const struct usb_endpoint_descriptor *epd; | ||
971 | unsigned int rate2; | ||
972 | |||
973 | fmt_capture = find_format_descriptor(ua->intf[INTF_CAPTURE]); | ||
974 | fmt_playback = find_format_descriptor(ua->intf[INTF_PLAYBACK]); | ||
975 | if (!fmt_capture || !fmt_playback) | ||
976 | return -ENXIO; | ||
977 | |||
978 | switch (fmt_capture->bSubframeSize) { | ||
979 | case 3: | ||
980 | ua->format_bit = SNDRV_PCM_FMTBIT_S24_3LE; | ||
981 | break; | ||
982 | case 4: | ||
983 | ua->format_bit = SNDRV_PCM_FMTBIT_S32_LE; | ||
984 | break; | ||
985 | default: | ||
986 | dev_err(&ua->dev->dev, "sample width is not 24 or 32 bits\n"); | ||
987 | return -ENXIO; | ||
988 | } | ||
989 | if (fmt_capture->bSubframeSize != fmt_playback->bSubframeSize) { | ||
990 | dev_err(&ua->dev->dev, | ||
991 | "playback/capture sample widths do not match\n"); | ||
992 | return -ENXIO; | ||
993 | } | ||
994 | |||
995 | if (fmt_capture->bBitResolution != 24 || | ||
996 | fmt_playback->bBitResolution != 24) { | ||
997 | dev_err(&ua->dev->dev, "sample width is not 24 bits\n"); | ||
998 | return -ENXIO; | ||
999 | } | ||
1000 | |||
1001 | ua->rate = combine_triple(fmt_capture->tSamFreq[0]); | ||
1002 | rate2 = combine_triple(fmt_playback->tSamFreq[0]); | ||
1003 | if (ua->rate != rate2) { | ||
1004 | dev_err(&ua->dev->dev, | ||
1005 | "playback/capture rates do not match: %u/%u\n", | ||
1006 | rate2, ua->rate); | ||
1007 | return -ENXIO; | ||
1008 | } | ||
1009 | |||
1010 | switch (ua->dev->speed) { | ||
1011 | case USB_SPEED_FULL: | ||
1012 | ua->packets_per_second = 1000; | ||
1013 | break; | ||
1014 | case USB_SPEED_HIGH: | ||
1015 | ua->packets_per_second = 8000; | ||
1016 | break; | ||
1017 | default: | ||
1018 | dev_err(&ua->dev->dev, "unknown device speed\n"); | ||
1019 | return -ENXIO; | ||
1020 | } | ||
1021 | |||
1022 | ua->capture.channels = fmt_capture->bNrChannels; | ||
1023 | ua->playback.channels = fmt_playback->bNrChannels; | ||
1024 | ua->capture.frame_bytes = | ||
1025 | fmt_capture->bSubframeSize * ua->capture.channels; | ||
1026 | ua->playback.frame_bytes = | ||
1027 | fmt_playback->bSubframeSize * ua->playback.channels; | ||
1028 | |||
1029 | epd = &ua->intf[INTF_CAPTURE]->altsetting[1].endpoint[0].desc; | ||
1030 | if (!usb_endpoint_is_isoc_in(epd)) { | ||
1031 | dev_err(&ua->dev->dev, "invalid capture endpoint\n"); | ||
1032 | return -ENXIO; | ||
1033 | } | ||
1034 | ua->capture.usb_pipe = usb_rcvisocpipe(ua->dev, usb_endpoint_num(epd)); | ||
1035 | ua->capture.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize); | ||
1036 | |||
1037 | epd = &ua->intf[INTF_PLAYBACK]->altsetting[1].endpoint[0].desc; | ||
1038 | if (!usb_endpoint_is_isoc_out(epd)) { | ||
1039 | dev_err(&ua->dev->dev, "invalid playback endpoint\n"); | ||
1040 | return -ENXIO; | ||
1041 | } | ||
1042 | ua->playback.usb_pipe = usb_sndisocpipe(ua->dev, usb_endpoint_num(epd)); | ||
1043 | ua->playback.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize); | ||
1044 | return 0; | ||
1045 | } | ||
1046 | |||
1047 | static int alloc_stream_buffers(struct ua101 *ua, struct ua101_stream *stream) | ||
1048 | { | ||
1049 | unsigned int remaining_packets, packets, packets_per_page, i; | ||
1050 | size_t size; | ||
1051 | |||
1052 | stream->queue_length = queue_length; | ||
1053 | stream->queue_length = max(stream->queue_length, | ||
1054 | (unsigned int)MIN_QUEUE_LENGTH); | ||
1055 | stream->queue_length = min(stream->queue_length, | ||
1056 | (unsigned int)MAX_QUEUE_LENGTH); | ||
1057 | |||
1058 | /* | ||
1059 | * The cache pool sizes used by usb_buffer_alloc() (128, 512, 2048) are | ||
1060 | * quite bad when used with the packet sizes of this device (e.g. 280, | ||
1061 | * 520, 624). Therefore, we allocate and subdivide entire pages, using | ||
1062 | * a smaller buffer only for the last chunk. | ||
1063 | */ | ||
1064 | remaining_packets = stream->queue_length; | ||
1065 | packets_per_page = PAGE_SIZE / stream->max_packet_bytes; | ||
1066 | for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i) { | ||
1067 | packets = min(remaining_packets, packets_per_page); | ||
1068 | size = packets * stream->max_packet_bytes; | ||
1069 | stream->buffers[i].addr = | ||
1070 | usb_buffer_alloc(ua->dev, size, GFP_KERNEL, | ||
1071 | &stream->buffers[i].dma); | ||
1072 | if (!stream->buffers[i].addr) | ||
1073 | return -ENOMEM; | ||
1074 | stream->buffers[i].size = size; | ||
1075 | remaining_packets -= packets; | ||
1076 | if (!remaining_packets) | ||
1077 | break; | ||
1078 | } | ||
1079 | if (remaining_packets) { | ||
1080 | dev_err(&ua->dev->dev, "too many packets\n"); | ||
1081 | return -ENXIO; | ||
1082 | } | ||
1083 | return 0; | ||
1084 | } | ||
1085 | |||
1086 | static void free_stream_buffers(struct ua101 *ua, struct ua101_stream *stream) | ||
1087 | { | ||
1088 | unsigned int i; | ||
1089 | |||
1090 | for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i) | ||
1091 | usb_buffer_free(ua->dev, | ||
1092 | stream->buffers[i].size, | ||
1093 | stream->buffers[i].addr, | ||
1094 | stream->buffers[i].dma); | ||
1095 | } | ||
1096 | |||
1097 | static int alloc_stream_urbs(struct ua101 *ua, struct ua101_stream *stream, | ||
1098 | void (*urb_complete)(struct urb *)) | ||
1099 | { | ||
1100 | unsigned max_packet_size = stream->max_packet_bytes; | ||
1101 | struct ua101_urb *urb; | ||
1102 | unsigned int b, u = 0; | ||
1103 | |||
1104 | for (b = 0; b < ARRAY_SIZE(stream->buffers); ++b) { | ||
1105 | unsigned int size = stream->buffers[b].size; | ||
1106 | u8 *addr = stream->buffers[b].addr; | ||
1107 | dma_addr_t dma = stream->buffers[b].dma; | ||
1108 | |||
1109 | while (size >= max_packet_size) { | ||
1110 | if (u >= stream->queue_length) | ||
1111 | goto bufsize_error; | ||
1112 | urb = kmalloc(sizeof(*urb), GFP_KERNEL); | ||
1113 | if (!urb) | ||
1114 | return -ENOMEM; | ||
1115 | usb_init_urb(&urb->urb); | ||
1116 | urb->urb.dev = ua->dev; | ||
1117 | urb->urb.pipe = stream->usb_pipe; | ||
1118 | urb->urb.transfer_flags = URB_ISO_ASAP | | ||
1119 | URB_NO_TRANSFER_DMA_MAP; | ||
1120 | urb->urb.transfer_buffer = addr; | ||
1121 | urb->urb.transfer_dma = dma; | ||
1122 | urb->urb.transfer_buffer_length = max_packet_size; | ||
1123 | urb->urb.number_of_packets = 1; | ||
1124 | urb->urb.interval = 1; | ||
1125 | urb->urb.context = ua; | ||
1126 | urb->urb.complete = urb_complete; | ||
1127 | urb->urb.iso_frame_desc[0].offset = 0; | ||
1128 | urb->urb.iso_frame_desc[0].length = max_packet_size; | ||
1129 | stream->urbs[u++] = urb; | ||
1130 | size -= max_packet_size; | ||
1131 | addr += max_packet_size; | ||
1132 | dma += max_packet_size; | ||
1133 | } | ||
1134 | } | ||
1135 | if (u == stream->queue_length) | ||
1136 | return 0; | ||
1137 | bufsize_error: | ||
1138 | dev_err(&ua->dev->dev, "internal buffer size error\n"); | ||
1139 | return -ENXIO; | ||
1140 | } | ||
1141 | |||
1142 | static void free_stream_urbs(struct ua101_stream *stream) | ||
1143 | { | ||
1144 | unsigned int i; | ||
1145 | |||
1146 | for (i = 0; i < stream->queue_length; ++i) | ||
1147 | kfree(stream->urbs[i]); | ||
1148 | } | ||
1149 | |||
1150 | static void free_usb_related_resources(struct ua101 *ua, | ||
1151 | struct usb_interface *interface) | ||
1152 | { | ||
1153 | unsigned int i; | ||
1154 | |||
1155 | free_stream_urbs(&ua->capture); | ||
1156 | free_stream_urbs(&ua->playback); | ||
1157 | free_stream_buffers(ua, &ua->capture); | ||
1158 | free_stream_buffers(ua, &ua->playback); | ||
1159 | |||
1160 | for (i = 0; i < ARRAY_SIZE(ua->intf); ++i) | ||
1161 | if (ua->intf[i]) { | ||
1162 | usb_set_intfdata(ua->intf[i], NULL); | ||
1163 | if (ua->intf[i] != interface) | ||
1164 | usb_driver_release_interface(&ua101_driver, | ||
1165 | ua->intf[i]); | ||
1166 | } | ||
1167 | } | ||
1168 | |||
1169 | static void ua101_card_free(struct snd_card *card) | ||
1170 | { | ||
1171 | struct ua101 *ua = card->private_data; | ||
1172 | |||
1173 | mutex_destroy(&ua->mutex); | ||
1174 | } | ||
1175 | |||
1176 | static int ua101_probe(struct usb_interface *interface, | ||
1177 | const struct usb_device_id *usb_id) | ||
1178 | { | ||
1179 | static const struct snd_usb_midi_endpoint_info midi_ep = { | ||
1180 | .out_cables = 0x0001, | ||
1181 | .in_cables = 0x0001 | ||
1182 | }; | ||
1183 | static const struct snd_usb_audio_quirk midi_quirk = { | ||
1184 | .type = QUIRK_MIDI_FIXED_ENDPOINT, | ||
1185 | .data = &midi_ep | ||
1186 | }; | ||
1187 | static const int intf_numbers[2][3] = { | ||
1188 | { /* UA-101 */ | ||
1189 | [INTF_PLAYBACK] = 0, | ||
1190 | [INTF_CAPTURE] = 1, | ||
1191 | [INTF_MIDI] = 2, | ||
1192 | }, | ||
1193 | { /* UA-1000 */ | ||
1194 | [INTF_CAPTURE] = 1, | ||
1195 | [INTF_PLAYBACK] = 2, | ||
1196 | [INTF_MIDI] = 3, | ||
1197 | }, | ||
1198 | }; | ||
1199 | struct snd_card *card; | ||
1200 | struct ua101 *ua; | ||
1201 | unsigned int card_index, i; | ||
1202 | int is_ua1000; | ||
1203 | const char *name; | ||
1204 | char usb_path[32]; | ||
1205 | int err; | ||
1206 | |||
1207 | is_ua1000 = usb_id->idProduct == 0x0044; | ||
1208 | |||
1209 | if (interface->altsetting->desc.bInterfaceNumber != | ||
1210 | intf_numbers[is_ua1000][0]) | ||
1211 | return -ENODEV; | ||
1212 | |||
1213 | mutex_lock(&devices_mutex); | ||
1214 | |||
1215 | for (card_index = 0; card_index < SNDRV_CARDS; ++card_index) | ||
1216 | if (enable[card_index] && !(devices_used & (1 << card_index))) | ||
1217 | break; | ||
1218 | if (card_index >= SNDRV_CARDS) { | ||
1219 | mutex_unlock(&devices_mutex); | ||
1220 | return -ENOENT; | ||
1221 | } | ||
1222 | err = snd_card_create(index[card_index], id[card_index], THIS_MODULE, | ||
1223 | sizeof(*ua), &card); | ||
1224 | if (err < 0) { | ||
1225 | mutex_unlock(&devices_mutex); | ||
1226 | return err; | ||
1227 | } | ||
1228 | card->private_free = ua101_card_free; | ||
1229 | ua = card->private_data; | ||
1230 | ua->dev = interface_to_usbdev(interface); | ||
1231 | ua->card = card; | ||
1232 | ua->card_index = card_index; | ||
1233 | INIT_LIST_HEAD(&ua->midi_list); | ||
1234 | spin_lock_init(&ua->lock); | ||
1235 | mutex_init(&ua->mutex); | ||
1236 | INIT_LIST_HEAD(&ua->ready_playback_urbs); | ||
1237 | tasklet_init(&ua->playback_tasklet, | ||
1238 | playback_tasklet, (unsigned long)ua); | ||
1239 | init_waitqueue_head(&ua->alsa_capture_wait); | ||
1240 | init_waitqueue_head(&ua->rate_feedback_wait); | ||
1241 | init_waitqueue_head(&ua->alsa_playback_wait); | ||
1242 | |||
1243 | ua->intf[0] = interface; | ||
1244 | for (i = 1; i < ARRAY_SIZE(ua->intf); ++i) { | ||
1245 | ua->intf[i] = usb_ifnum_to_if(ua->dev, | ||
1246 | intf_numbers[is_ua1000][i]); | ||
1247 | if (!ua->intf[i]) { | ||
1248 | dev_err(&ua->dev->dev, "interface %u not found\n", | ||
1249 | intf_numbers[is_ua1000][i]); | ||
1250 | err = -ENXIO; | ||
1251 | goto probe_error; | ||
1252 | } | ||
1253 | err = usb_driver_claim_interface(&ua101_driver, | ||
1254 | ua->intf[i], ua); | ||
1255 | if (err < 0) { | ||
1256 | ua->intf[i] = NULL; | ||
1257 | err = -EBUSY; | ||
1258 | goto probe_error; | ||
1259 | } | ||
1260 | } | ||
1261 | |||
1262 | snd_card_set_dev(card, &interface->dev); | ||
1263 | |||
1264 | err = detect_usb_format(ua); | ||
1265 | if (err < 0) | ||
1266 | goto probe_error; | ||
1267 | |||
1268 | name = usb_id->idProduct == 0x0044 ? "UA-1000" : "UA-101"; | ||
1269 | strcpy(card->driver, "UA-101"); | ||
1270 | strcpy(card->shortname, name); | ||
1271 | usb_make_path(ua->dev, usb_path, sizeof(usb_path)); | ||
1272 | snprintf(ua->card->longname, sizeof(ua->card->longname), | ||
1273 | "EDIROL %s (serial %s), %u Hz at %s, %s speed", name, | ||
1274 | ua->dev->serial ? ua->dev->serial : "?", ua->rate, usb_path, | ||
1275 | ua->dev->speed == USB_SPEED_HIGH ? "high" : "full"); | ||
1276 | |||
1277 | err = alloc_stream_buffers(ua, &ua->capture); | ||
1278 | if (err < 0) | ||
1279 | goto probe_error; | ||
1280 | err = alloc_stream_buffers(ua, &ua->playback); | ||
1281 | if (err < 0) | ||
1282 | goto probe_error; | ||
1283 | |||
1284 | err = alloc_stream_urbs(ua, &ua->capture, capture_urb_complete); | ||
1285 | if (err < 0) | ||
1286 | goto probe_error; | ||
1287 | err = alloc_stream_urbs(ua, &ua->playback, playback_urb_complete); | ||
1288 | if (err < 0) | ||
1289 | goto probe_error; | ||
1290 | |||
1291 | err = snd_pcm_new(card, name, 0, 1, 1, &ua->pcm); | ||
1292 | if (err < 0) | ||
1293 | goto probe_error; | ||
1294 | ua->pcm->private_data = ua; | ||
1295 | strcpy(ua->pcm->name, name); | ||
1296 | snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_pcm_ops); | ||
1297 | snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_pcm_ops); | ||
1298 | |||
1299 | err = snd_usbmidi_create(card, ua->intf[INTF_MIDI], | ||
1300 | &ua->midi_list, &midi_quirk); | ||
1301 | if (err < 0) | ||
1302 | goto probe_error; | ||
1303 | |||
1304 | err = snd_card_register(card); | ||
1305 | if (err < 0) | ||
1306 | goto probe_error; | ||
1307 | |||
1308 | usb_set_intfdata(interface, ua); | ||
1309 | devices_used |= 1 << card_index; | ||
1310 | |||
1311 | mutex_unlock(&devices_mutex); | ||
1312 | return 0; | ||
1313 | |||
1314 | probe_error: | ||
1315 | free_usb_related_resources(ua, interface); | ||
1316 | snd_card_free(card); | ||
1317 | mutex_unlock(&devices_mutex); | ||
1318 | return err; | ||
1319 | } | ||
1320 | |||
1321 | static void ua101_disconnect(struct usb_interface *interface) | ||
1322 | { | ||
1323 | struct ua101 *ua = usb_get_intfdata(interface); | ||
1324 | struct list_head *midi; | ||
1325 | |||
1326 | if (!ua) | ||
1327 | return; | ||
1328 | |||
1329 | mutex_lock(&devices_mutex); | ||
1330 | |||
1331 | set_bit(DISCONNECTED, &ua->states); | ||
1332 | wake_up(&ua->rate_feedback_wait); | ||
1333 | |||
1334 | /* make sure that userspace cannot create new requests */ | ||
1335 | snd_card_disconnect(ua->card); | ||
1336 | |||
1337 | /* make sure that there are no pending USB requests */ | ||
1338 | __list_for_each(midi, &ua->midi_list) | ||
1339 | snd_usbmidi_disconnect(midi); | ||
1340 | abort_alsa_playback(ua); | ||
1341 | abort_alsa_capture(ua); | ||
1342 | mutex_lock(&ua->mutex); | ||
1343 | stop_usb_playback(ua); | ||
1344 | stop_usb_capture(ua); | ||
1345 | mutex_unlock(&ua->mutex); | ||
1346 | |||
1347 | free_usb_related_resources(ua, interface); | ||
1348 | |||
1349 | devices_used &= ~(1 << ua->card_index); | ||
1350 | |||
1351 | snd_card_free_when_closed(ua->card); | ||
1352 | |||
1353 | mutex_unlock(&devices_mutex); | ||
1354 | } | ||
1355 | |||
1356 | static struct usb_device_id ua101_ids[] = { | ||
1357 | { USB_DEVICE(0x0582, 0x0044) }, /* UA-1000 high speed */ | ||
1358 | { USB_DEVICE(0x0582, 0x007d) }, /* UA-101 high speed */ | ||
1359 | { USB_DEVICE(0x0582, 0x008d) }, /* UA-101 full speed */ | ||
1360 | { } | ||
1361 | }; | ||
1362 | MODULE_DEVICE_TABLE(usb, ua101_ids); | ||
1363 | |||
1364 | static struct usb_driver ua101_driver = { | ||
1365 | .name = "snd-ua101", | ||
1366 | .id_table = ua101_ids, | ||
1367 | .probe = ua101_probe, | ||
1368 | .disconnect = ua101_disconnect, | ||
1369 | #if 0 | ||
1370 | .suspend = ua101_suspend, | ||
1371 | .resume = ua101_resume, | ||
1372 | #endif | ||
1373 | }; | ||
1374 | |||
1375 | static int __init alsa_card_ua101_init(void) | ||
1376 | { | ||
1377 | return usb_register(&ua101_driver); | ||
1378 | } | ||
1379 | |||
1380 | static void __exit alsa_card_ua101_exit(void) | ||
1381 | { | ||
1382 | usb_deregister(&ua101_driver); | ||
1383 | mutex_destroy(&devices_mutex); | ||
1384 | } | ||
1385 | |||
1386 | module_init(alsa_card_ua101_init); | ||
1387 | module_exit(alsa_card_ua101_exit); | ||