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e5779998 DM |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
15 | * | |
16 | */ | |
17 | ||
7b7b9042 | 18 | #include <linux/gfp.h> |
e5779998 DM |
19 | #include <linux/init.h> |
20 | #include <linux/usb.h> | |
21 | #include <linux/usb/audio.h> | |
22 | ||
23 | #include <sound/core.h> | |
24 | #include <sound/pcm.h> | |
25 | ||
26 | #include "usbaudio.h" | |
27 | #include "helper.h" | |
28 | #include "card.h" | |
29 | #include "urb.h" | |
30 | #include "pcm.h" | |
31 | ||
32 | /* | |
33 | * convert a sampling rate into our full speed format (fs/1000 in Q16.16) | |
34 | * this will overflow at approx 524 kHz | |
35 | */ | |
36 | static inline unsigned get_usb_full_speed_rate(unsigned int rate) | |
37 | { | |
38 | return ((rate << 13) + 62) / 125; | |
39 | } | |
40 | ||
41 | /* | |
42 | * convert a sampling rate into USB high speed format (fs/8000 in Q16.16) | |
43 | * this will overflow at approx 4 MHz | |
44 | */ | |
45 | static inline unsigned get_usb_high_speed_rate(unsigned int rate) | |
46 | { | |
47 | return ((rate << 10) + 62) / 125; | |
48 | } | |
49 | ||
50 | /* | |
51 | * unlink active urbs. | |
52 | */ | |
53 | static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep) | |
54 | { | |
55 | struct snd_usb_audio *chip = subs->stream->chip; | |
56 | unsigned int i; | |
57 | int async; | |
58 | ||
59 | subs->running = 0; | |
60 | ||
61 | if (!force && subs->stream->chip->shutdown) /* to be sure... */ | |
62 | return -EBADFD; | |
63 | ||
64 | async = !can_sleep && chip->async_unlink; | |
65 | ||
66 | if (!async && in_interrupt()) | |
67 | return 0; | |
68 | ||
69 | for (i = 0; i < subs->nurbs; i++) { | |
70 | if (test_bit(i, &subs->active_mask)) { | |
71 | if (!test_and_set_bit(i, &subs->unlink_mask)) { | |
72 | struct urb *u = subs->dataurb[i].urb; | |
73 | if (async) | |
74 | usb_unlink_urb(u); | |
75 | else | |
76 | usb_kill_urb(u); | |
77 | } | |
78 | } | |
79 | } | |
80 | if (subs->syncpipe) { | |
81 | for (i = 0; i < SYNC_URBS; i++) { | |
82 | if (test_bit(i+16, &subs->active_mask)) { | |
83 | if (!test_and_set_bit(i+16, &subs->unlink_mask)) { | |
84 | struct urb *u = subs->syncurb[i].urb; | |
85 | if (async) | |
86 | usb_unlink_urb(u); | |
87 | else | |
88 | usb_kill_urb(u); | |
89 | } | |
90 | } | |
91 | } | |
92 | } | |
93 | return 0; | |
94 | } | |
95 | ||
96 | ||
97 | /* | |
98 | * release a urb data | |
99 | */ | |
100 | static void release_urb_ctx(struct snd_urb_ctx *u) | |
101 | { | |
102 | if (u->urb) { | |
103 | if (u->buffer_size) | |
3d62e3fd | 104 | usb_free_coherent(u->subs->dev, u->buffer_size, |
e5779998 DM |
105 | u->urb->transfer_buffer, |
106 | u->urb->transfer_dma); | |
107 | usb_free_urb(u->urb); | |
108 | u->urb = NULL; | |
109 | } | |
110 | } | |
111 | ||
112 | /* | |
113 | * wait until all urbs are processed. | |
114 | */ | |
115 | static int wait_clear_urbs(struct snd_usb_substream *subs) | |
116 | { | |
117 | unsigned long end_time = jiffies + msecs_to_jiffies(1000); | |
118 | unsigned int i; | |
119 | int alive; | |
120 | ||
121 | do { | |
122 | alive = 0; | |
123 | for (i = 0; i < subs->nurbs; i++) { | |
124 | if (test_bit(i, &subs->active_mask)) | |
125 | alive++; | |
126 | } | |
127 | if (subs->syncpipe) { | |
128 | for (i = 0; i < SYNC_URBS; i++) { | |
129 | if (test_bit(i + 16, &subs->active_mask)) | |
130 | alive++; | |
131 | } | |
132 | } | |
133 | if (! alive) | |
134 | break; | |
135 | schedule_timeout_uninterruptible(1); | |
136 | } while (time_before(jiffies, end_time)); | |
137 | if (alive) | |
138 | snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | /* | |
143 | * release a substream | |
144 | */ | |
145 | void snd_usb_release_substream_urbs(struct snd_usb_substream *subs, int force) | |
146 | { | |
147 | int i; | |
148 | ||
149 | /* stop urbs (to be sure) */ | |
150 | deactivate_urbs(subs, force, 1); | |
151 | wait_clear_urbs(subs); | |
152 | ||
153 | for (i = 0; i < MAX_URBS; i++) | |
154 | release_urb_ctx(&subs->dataurb[i]); | |
155 | for (i = 0; i < SYNC_URBS; i++) | |
156 | release_urb_ctx(&subs->syncurb[i]); | |
3d62e3fd | 157 | usb_free_coherent(subs->dev, SYNC_URBS * 4, |
e5779998 DM |
158 | subs->syncbuf, subs->sync_dma); |
159 | subs->syncbuf = NULL; | |
160 | subs->nurbs = 0; | |
161 | } | |
162 | ||
163 | /* | |
164 | * complete callback from data urb | |
165 | */ | |
166 | static void snd_complete_urb(struct urb *urb) | |
167 | { | |
168 | struct snd_urb_ctx *ctx = urb->context; | |
169 | struct snd_usb_substream *subs = ctx->subs; | |
170 | struct snd_pcm_substream *substream = ctx->subs->pcm_substream; | |
171 | int err = 0; | |
172 | ||
173 | if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) || | |
174 | !subs->running || /* can be stopped during retire callback */ | |
175 | (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 || | |
176 | (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { | |
177 | clear_bit(ctx->index, &subs->active_mask); | |
178 | if (err < 0) { | |
179 | snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err); | |
180 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
185 | ||
186 | /* | |
187 | * complete callback from sync urb | |
188 | */ | |
189 | static void snd_complete_sync_urb(struct urb *urb) | |
190 | { | |
191 | struct snd_urb_ctx *ctx = urb->context; | |
192 | struct snd_usb_substream *subs = ctx->subs; | |
193 | struct snd_pcm_substream *substream = ctx->subs->pcm_substream; | |
194 | int err = 0; | |
195 | ||
196 | if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) || | |
197 | !subs->running || /* can be stopped during retire callback */ | |
198 | (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 || | |
199 | (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { | |
200 | clear_bit(ctx->index + 16, &subs->active_mask); | |
201 | if (err < 0) { | |
202 | snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err); | |
203 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
204 | } | |
205 | } | |
206 | } | |
207 | ||
208 | ||
209 | /* | |
210 | * initialize a substream for plaback/capture | |
211 | */ | |
212 | int snd_usb_init_substream_urbs(struct snd_usb_substream *subs, | |
213 | unsigned int period_bytes, | |
214 | unsigned int rate, | |
215 | unsigned int frame_bits) | |
216 | { | |
217 | unsigned int maxsize, i; | |
218 | int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; | |
219 | unsigned int urb_packs, total_packs, packs_per_ms; | |
220 | struct snd_usb_audio *chip = subs->stream->chip; | |
221 | ||
222 | /* calculate the frequency in 16.16 format */ | |
223 | if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) | |
224 | subs->freqn = get_usb_full_speed_rate(rate); | |
225 | else | |
226 | subs->freqn = get_usb_high_speed_rate(rate); | |
227 | subs->freqm = subs->freqn; | |
228 | /* calculate max. frequency */ | |
229 | if (subs->maxpacksize) { | |
230 | /* whatever fits into a max. size packet */ | |
231 | maxsize = subs->maxpacksize; | |
232 | subs->freqmax = (maxsize / (frame_bits >> 3)) | |
233 | << (16 - subs->datainterval); | |
234 | } else { | |
235 | /* no max. packet size: just take 25% higher than nominal */ | |
236 | subs->freqmax = subs->freqn + (subs->freqn >> 2); | |
237 | maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3)) | |
238 | >> (16 - subs->datainterval); | |
239 | } | |
240 | subs->phase = 0; | |
241 | ||
242 | if (subs->fill_max) | |
243 | subs->curpacksize = subs->maxpacksize; | |
244 | else | |
245 | subs->curpacksize = maxsize; | |
246 | ||
247 | if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) | |
248 | packs_per_ms = 8 >> subs->datainterval; | |
249 | else | |
250 | packs_per_ms = 1; | |
251 | ||
252 | if (is_playback) { | |
253 | urb_packs = max(chip->nrpacks, 1); | |
254 | urb_packs = min(urb_packs, (unsigned int)MAX_PACKS); | |
255 | } else | |
256 | urb_packs = 1; | |
257 | urb_packs *= packs_per_ms; | |
258 | if (subs->syncpipe) | |
259 | urb_packs = min(urb_packs, 1U << subs->syncinterval); | |
260 | ||
261 | /* decide how many packets to be used */ | |
262 | if (is_playback) { | |
263 | unsigned int minsize, maxpacks; | |
264 | /* determine how small a packet can be */ | |
265 | minsize = (subs->freqn >> (16 - subs->datainterval)) | |
266 | * (frame_bits >> 3); | |
267 | /* with sync from device, assume it can be 12% lower */ | |
268 | if (subs->syncpipe) | |
269 | minsize -= minsize >> 3; | |
270 | minsize = max(minsize, 1u); | |
271 | total_packs = (period_bytes + minsize - 1) / minsize; | |
272 | /* we need at least two URBs for queueing */ | |
273 | if (total_packs < 2) { | |
274 | total_packs = 2; | |
275 | } else { | |
276 | /* and we don't want too long a queue either */ | |
277 | maxpacks = max(MAX_QUEUE * packs_per_ms, urb_packs * 2); | |
278 | total_packs = min(total_packs, maxpacks); | |
279 | } | |
280 | } else { | |
281 | while (urb_packs > 1 && urb_packs * maxsize >= period_bytes) | |
282 | urb_packs >>= 1; | |
283 | total_packs = MAX_URBS * urb_packs; | |
284 | } | |
285 | subs->nurbs = (total_packs + urb_packs - 1) / urb_packs; | |
286 | if (subs->nurbs > MAX_URBS) { | |
287 | /* too much... */ | |
288 | subs->nurbs = MAX_URBS; | |
289 | total_packs = MAX_URBS * urb_packs; | |
290 | } else if (subs->nurbs < 2) { | |
291 | /* too little - we need at least two packets | |
292 | * to ensure contiguous playback/capture | |
293 | */ | |
294 | subs->nurbs = 2; | |
295 | } | |
296 | ||
297 | /* allocate and initialize data urbs */ | |
298 | for (i = 0; i < subs->nurbs; i++) { | |
299 | struct snd_urb_ctx *u = &subs->dataurb[i]; | |
300 | u->index = i; | |
301 | u->subs = subs; | |
302 | u->packets = (i + 1) * total_packs / subs->nurbs | |
303 | - i * total_packs / subs->nurbs; | |
304 | u->buffer_size = maxsize * u->packets; | |
305 | if (subs->fmt_type == UAC_FORMAT_TYPE_II) | |
306 | u->packets++; /* for transfer delimiter */ | |
307 | u->urb = usb_alloc_urb(u->packets, GFP_KERNEL); | |
308 | if (!u->urb) | |
309 | goto out_of_memory; | |
310 | u->urb->transfer_buffer = | |
3d62e3fd SR |
311 | usb_alloc_coherent(subs->dev, u->buffer_size, |
312 | GFP_KERNEL, &u->urb->transfer_dma); | |
e5779998 DM |
313 | if (!u->urb->transfer_buffer) |
314 | goto out_of_memory; | |
315 | u->urb->pipe = subs->datapipe; | |
316 | u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; | |
317 | u->urb->interval = 1 << subs->datainterval; | |
318 | u->urb->context = u; | |
319 | u->urb->complete = snd_complete_urb; | |
320 | } | |
321 | ||
322 | if (subs->syncpipe) { | |
323 | /* allocate and initialize sync urbs */ | |
3d62e3fd | 324 | subs->syncbuf = usb_alloc_coherent(subs->dev, SYNC_URBS * 4, |
e5779998 DM |
325 | GFP_KERNEL, &subs->sync_dma); |
326 | if (!subs->syncbuf) | |
327 | goto out_of_memory; | |
328 | for (i = 0; i < SYNC_URBS; i++) { | |
329 | struct snd_urb_ctx *u = &subs->syncurb[i]; | |
330 | u->index = i; | |
331 | u->subs = subs; | |
332 | u->packets = 1; | |
333 | u->urb = usb_alloc_urb(1, GFP_KERNEL); | |
334 | if (!u->urb) | |
335 | goto out_of_memory; | |
336 | u->urb->transfer_buffer = subs->syncbuf + i * 4; | |
337 | u->urb->transfer_dma = subs->sync_dma + i * 4; | |
338 | u->urb->transfer_buffer_length = 4; | |
339 | u->urb->pipe = subs->syncpipe; | |
340 | u->urb->transfer_flags = URB_ISO_ASAP | | |
341 | URB_NO_TRANSFER_DMA_MAP; | |
342 | u->urb->number_of_packets = 1; | |
343 | u->urb->interval = 1 << subs->syncinterval; | |
344 | u->urb->context = u; | |
345 | u->urb->complete = snd_complete_sync_urb; | |
346 | } | |
347 | } | |
348 | return 0; | |
349 | ||
350 | out_of_memory: | |
351 | snd_usb_release_substream_urbs(subs, 0); | |
352 | return -ENOMEM; | |
353 | } | |
354 | ||
355 | /* | |
356 | * prepare urb for full speed capture sync pipe | |
357 | * | |
358 | * fill the length and offset of each urb descriptor. | |
359 | * the fixed 10.14 frequency is passed through the pipe. | |
360 | */ | |
361 | static int prepare_capture_sync_urb(struct snd_usb_substream *subs, | |
362 | struct snd_pcm_runtime *runtime, | |
363 | struct urb *urb) | |
364 | { | |
365 | unsigned char *cp = urb->transfer_buffer; | |
366 | struct snd_urb_ctx *ctx = urb->context; | |
367 | ||
368 | urb->dev = ctx->subs->dev; /* we need to set this at each time */ | |
369 | urb->iso_frame_desc[0].length = 3; | |
370 | urb->iso_frame_desc[0].offset = 0; | |
371 | cp[0] = subs->freqn >> 2; | |
372 | cp[1] = subs->freqn >> 10; | |
373 | cp[2] = subs->freqn >> 18; | |
374 | return 0; | |
375 | } | |
376 | ||
377 | /* | |
378 | * prepare urb for high speed capture sync pipe | |
379 | * | |
380 | * fill the length and offset of each urb descriptor. | |
381 | * the fixed 12.13 frequency is passed as 16.16 through the pipe. | |
382 | */ | |
383 | static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs, | |
384 | struct snd_pcm_runtime *runtime, | |
385 | struct urb *urb) | |
386 | { | |
387 | unsigned char *cp = urb->transfer_buffer; | |
388 | struct snd_urb_ctx *ctx = urb->context; | |
389 | ||
390 | urb->dev = ctx->subs->dev; /* we need to set this at each time */ | |
391 | urb->iso_frame_desc[0].length = 4; | |
392 | urb->iso_frame_desc[0].offset = 0; | |
393 | cp[0] = subs->freqn; | |
394 | cp[1] = subs->freqn >> 8; | |
395 | cp[2] = subs->freqn >> 16; | |
396 | cp[3] = subs->freqn >> 24; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | /* | |
401 | * process after capture sync complete | |
402 | * - nothing to do | |
403 | */ | |
404 | static int retire_capture_sync_urb(struct snd_usb_substream *subs, | |
405 | struct snd_pcm_runtime *runtime, | |
406 | struct urb *urb) | |
407 | { | |
408 | return 0; | |
409 | } | |
410 | ||
411 | /* | |
412 | * prepare urb for capture data pipe | |
413 | * | |
414 | * fill the offset and length of each descriptor. | |
415 | * | |
416 | * we use a temporary buffer to write the captured data. | |
417 | * since the length of written data is determined by host, we cannot | |
418 | * write onto the pcm buffer directly... the data is thus copied | |
419 | * later at complete callback to the global buffer. | |
420 | */ | |
421 | static int prepare_capture_urb(struct snd_usb_substream *subs, | |
422 | struct snd_pcm_runtime *runtime, | |
423 | struct urb *urb) | |
424 | { | |
425 | int i, offs; | |
426 | struct snd_urb_ctx *ctx = urb->context; | |
427 | ||
428 | offs = 0; | |
429 | urb->dev = ctx->subs->dev; /* we need to set this at each time */ | |
430 | for (i = 0; i < ctx->packets; i++) { | |
431 | urb->iso_frame_desc[i].offset = offs; | |
432 | urb->iso_frame_desc[i].length = subs->curpacksize; | |
433 | offs += subs->curpacksize; | |
434 | } | |
435 | urb->transfer_buffer_length = offs; | |
436 | urb->number_of_packets = ctx->packets; | |
437 | return 0; | |
438 | } | |
439 | ||
440 | /* | |
441 | * process after capture complete | |
442 | * | |
443 | * copy the data from each desctiptor to the pcm buffer, and | |
444 | * update the current position. | |
445 | */ | |
446 | static int retire_capture_urb(struct snd_usb_substream *subs, | |
447 | struct snd_pcm_runtime *runtime, | |
448 | struct urb *urb) | |
449 | { | |
450 | unsigned long flags; | |
451 | unsigned char *cp; | |
452 | int i; | |
453 | unsigned int stride, frames, bytes, oldptr; | |
454 | int period_elapsed = 0; | |
455 | ||
456 | stride = runtime->frame_bits >> 3; | |
457 | ||
458 | for (i = 0; i < urb->number_of_packets; i++) { | |
459 | cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset; | |
460 | if (urb->iso_frame_desc[i].status) { | |
461 | snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status); | |
462 | // continue; | |
463 | } | |
464 | bytes = urb->iso_frame_desc[i].actual_length; | |
465 | frames = bytes / stride; | |
466 | if (!subs->txfr_quirk) | |
467 | bytes = frames * stride; | |
468 | if (bytes % (runtime->sample_bits >> 3) != 0) { | |
469 | #ifdef CONFIG_SND_DEBUG_VERBOSE | |
470 | int oldbytes = bytes; | |
471 | #endif | |
472 | bytes = frames * stride; | |
473 | snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n", | |
474 | oldbytes, bytes); | |
475 | } | |
476 | /* update the current pointer */ | |
477 | spin_lock_irqsave(&subs->lock, flags); | |
478 | oldptr = subs->hwptr_done; | |
479 | subs->hwptr_done += bytes; | |
480 | if (subs->hwptr_done >= runtime->buffer_size * stride) | |
481 | subs->hwptr_done -= runtime->buffer_size * stride; | |
482 | frames = (bytes + (oldptr % stride)) / stride; | |
483 | subs->transfer_done += frames; | |
484 | if (subs->transfer_done >= runtime->period_size) { | |
485 | subs->transfer_done -= runtime->period_size; | |
486 | period_elapsed = 1; | |
487 | } | |
488 | spin_unlock_irqrestore(&subs->lock, flags); | |
489 | /* copy a data chunk */ | |
490 | if (oldptr + bytes > runtime->buffer_size * stride) { | |
491 | unsigned int bytes1 = | |
492 | runtime->buffer_size * stride - oldptr; | |
493 | memcpy(runtime->dma_area + oldptr, cp, bytes1); | |
494 | memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); | |
495 | } else { | |
496 | memcpy(runtime->dma_area + oldptr, cp, bytes); | |
497 | } | |
498 | } | |
499 | if (period_elapsed) | |
500 | snd_pcm_period_elapsed(subs->pcm_substream); | |
501 | return 0; | |
502 | } | |
503 | ||
504 | /* | |
505 | * Process after capture complete when paused. Nothing to do. | |
506 | */ | |
507 | static int retire_paused_capture_urb(struct snd_usb_substream *subs, | |
508 | struct snd_pcm_runtime *runtime, | |
509 | struct urb *urb) | |
510 | { | |
511 | return 0; | |
512 | } | |
513 | ||
514 | ||
515 | /* | |
516 | * prepare urb for full speed playback sync pipe | |
517 | * | |
518 | * set up the offset and length to receive the current frequency. | |
519 | */ | |
520 | ||
521 | static int prepare_playback_sync_urb(struct snd_usb_substream *subs, | |
522 | struct snd_pcm_runtime *runtime, | |
523 | struct urb *urb) | |
524 | { | |
525 | struct snd_urb_ctx *ctx = urb->context; | |
526 | ||
527 | urb->dev = ctx->subs->dev; /* we need to set this at each time */ | |
528 | urb->iso_frame_desc[0].length = 3; | |
529 | urb->iso_frame_desc[0].offset = 0; | |
530 | return 0; | |
531 | } | |
532 | ||
533 | /* | |
534 | * prepare urb for high speed playback sync pipe | |
535 | * | |
536 | * set up the offset and length to receive the current frequency. | |
537 | */ | |
538 | ||
539 | static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs, | |
540 | struct snd_pcm_runtime *runtime, | |
541 | struct urb *urb) | |
542 | { | |
543 | struct snd_urb_ctx *ctx = urb->context; | |
544 | ||
545 | urb->dev = ctx->subs->dev; /* we need to set this at each time */ | |
546 | urb->iso_frame_desc[0].length = 4; | |
547 | urb->iso_frame_desc[0].offset = 0; | |
548 | return 0; | |
549 | } | |
550 | ||
551 | /* | |
552 | * process after full speed playback sync complete | |
553 | * | |
554 | * retrieve the current 10.14 frequency from pipe, and set it. | |
555 | * the value is referred in prepare_playback_urb(). | |
556 | */ | |
557 | static int retire_playback_sync_urb(struct snd_usb_substream *subs, | |
558 | struct snd_pcm_runtime *runtime, | |
559 | struct urb *urb) | |
560 | { | |
561 | unsigned int f; | |
562 | unsigned long flags; | |
563 | ||
564 | if (urb->iso_frame_desc[0].status == 0 && | |
565 | urb->iso_frame_desc[0].actual_length == 3) { | |
566 | f = combine_triple((u8*)urb->transfer_buffer) << 2; | |
567 | if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) { | |
568 | spin_lock_irqsave(&subs->lock, flags); | |
569 | subs->freqm = f; | |
570 | spin_unlock_irqrestore(&subs->lock, flags); | |
571 | } | |
572 | } | |
573 | ||
574 | return 0; | |
575 | } | |
576 | ||
577 | /* | |
578 | * process after high speed playback sync complete | |
579 | * | |
580 | * retrieve the current 12.13 frequency from pipe, and set it. | |
581 | * the value is referred in prepare_playback_urb(). | |
582 | */ | |
583 | static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs, | |
584 | struct snd_pcm_runtime *runtime, | |
585 | struct urb *urb) | |
586 | { | |
587 | unsigned int f; | |
588 | unsigned long flags; | |
589 | ||
590 | if (urb->iso_frame_desc[0].status == 0 && | |
591 | urb->iso_frame_desc[0].actual_length == 4) { | |
592 | f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff; | |
593 | if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) { | |
594 | spin_lock_irqsave(&subs->lock, flags); | |
595 | subs->freqm = f; | |
596 | spin_unlock_irqrestore(&subs->lock, flags); | |
597 | } | |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
603 | /* | |
604 | * process after E-Mu 0202/0404/Tracker Pre high speed playback sync complete | |
605 | * | |
606 | * These devices return the number of samples per packet instead of the number | |
607 | * of samples per microframe. | |
608 | */ | |
609 | static int retire_playback_sync_urb_hs_emu(struct snd_usb_substream *subs, | |
610 | struct snd_pcm_runtime *runtime, | |
611 | struct urb *urb) | |
612 | { | |
613 | unsigned int f; | |
614 | unsigned long flags; | |
615 | ||
616 | if (urb->iso_frame_desc[0].status == 0 && | |
617 | urb->iso_frame_desc[0].actual_length == 4) { | |
618 | f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff; | |
619 | f >>= subs->datainterval; | |
620 | if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) { | |
621 | spin_lock_irqsave(&subs->lock, flags); | |
622 | subs->freqm = f; | |
623 | spin_unlock_irqrestore(&subs->lock, flags); | |
624 | } | |
625 | } | |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
630 | /* determine the number of frames in the next packet */ | |
631 | static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs) | |
632 | { | |
633 | if (subs->fill_max) | |
634 | return subs->maxframesize; | |
635 | else { | |
636 | subs->phase = (subs->phase & 0xffff) | |
637 | + (subs->freqm << subs->datainterval); | |
638 | return min(subs->phase >> 16, subs->maxframesize); | |
639 | } | |
640 | } | |
641 | ||
642 | /* | |
643 | * Prepare urb for streaming before playback starts or when paused. | |
644 | * | |
645 | * We don't have any data, so we send silence. | |
646 | */ | |
647 | static int prepare_nodata_playback_urb(struct snd_usb_substream *subs, | |
648 | struct snd_pcm_runtime *runtime, | |
649 | struct urb *urb) | |
650 | { | |
651 | unsigned int i, offs, counts; | |
652 | struct snd_urb_ctx *ctx = urb->context; | |
653 | int stride = runtime->frame_bits >> 3; | |
654 | ||
655 | offs = 0; | |
656 | urb->dev = ctx->subs->dev; | |
657 | for (i = 0; i < ctx->packets; ++i) { | |
658 | counts = snd_usb_audio_next_packet_size(subs); | |
659 | urb->iso_frame_desc[i].offset = offs * stride; | |
660 | urb->iso_frame_desc[i].length = counts * stride; | |
661 | offs += counts; | |
662 | } | |
663 | urb->number_of_packets = ctx->packets; | |
664 | urb->transfer_buffer_length = offs * stride; | |
665 | memset(urb->transfer_buffer, | |
015eb0b0 | 666 | runtime->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0, |
e5779998 DM |
667 | offs * stride); |
668 | return 0; | |
669 | } | |
670 | ||
671 | /* | |
672 | * prepare urb for playback data pipe | |
673 | * | |
674 | * Since a URB can handle only a single linear buffer, we must use double | |
675 | * buffering when the data to be transferred overflows the buffer boundary. | |
676 | * To avoid inconsistencies when updating hwptr_done, we use double buffering | |
677 | * for all URBs. | |
678 | */ | |
679 | static int prepare_playback_urb(struct snd_usb_substream *subs, | |
680 | struct snd_pcm_runtime *runtime, | |
681 | struct urb *urb) | |
682 | { | |
683 | int i, stride; | |
684 | unsigned int counts, frames, bytes; | |
685 | unsigned long flags; | |
686 | int period_elapsed = 0; | |
687 | struct snd_urb_ctx *ctx = urb->context; | |
688 | ||
689 | stride = runtime->frame_bits >> 3; | |
690 | ||
691 | frames = 0; | |
692 | urb->dev = ctx->subs->dev; /* we need to set this at each time */ | |
693 | urb->number_of_packets = 0; | |
694 | spin_lock_irqsave(&subs->lock, flags); | |
695 | for (i = 0; i < ctx->packets; i++) { | |
696 | counts = snd_usb_audio_next_packet_size(subs); | |
697 | /* set up descriptor */ | |
698 | urb->iso_frame_desc[i].offset = frames * stride; | |
699 | urb->iso_frame_desc[i].length = counts * stride; | |
700 | frames += counts; | |
701 | urb->number_of_packets++; | |
702 | subs->transfer_done += counts; | |
703 | if (subs->transfer_done >= runtime->period_size) { | |
704 | subs->transfer_done -= runtime->period_size; | |
705 | period_elapsed = 1; | |
706 | if (subs->fmt_type == UAC_FORMAT_TYPE_II) { | |
707 | if (subs->transfer_done > 0) { | |
708 | /* FIXME: fill-max mode is not | |
709 | * supported yet */ | |
710 | frames -= subs->transfer_done; | |
711 | counts -= subs->transfer_done; | |
712 | urb->iso_frame_desc[i].length = | |
713 | counts * stride; | |
714 | subs->transfer_done = 0; | |
715 | } | |
716 | i++; | |
717 | if (i < ctx->packets) { | |
718 | /* add a transfer delimiter */ | |
719 | urb->iso_frame_desc[i].offset = | |
720 | frames * stride; | |
721 | urb->iso_frame_desc[i].length = 0; | |
722 | urb->number_of_packets++; | |
723 | } | |
724 | break; | |
725 | } | |
726 | } | |
727 | if (period_elapsed) /* finish at the period boundary */ | |
728 | break; | |
729 | } | |
730 | bytes = frames * stride; | |
731 | if (subs->hwptr_done + bytes > runtime->buffer_size * stride) { | |
732 | /* err, the transferred area goes over buffer boundary. */ | |
733 | unsigned int bytes1 = | |
734 | runtime->buffer_size * stride - subs->hwptr_done; | |
735 | memcpy(urb->transfer_buffer, | |
736 | runtime->dma_area + subs->hwptr_done, bytes1); | |
737 | memcpy(urb->transfer_buffer + bytes1, | |
738 | runtime->dma_area, bytes - bytes1); | |
739 | } else { | |
740 | memcpy(urb->transfer_buffer, | |
741 | runtime->dma_area + subs->hwptr_done, bytes); | |
742 | } | |
743 | subs->hwptr_done += bytes; | |
744 | if (subs->hwptr_done >= runtime->buffer_size * stride) | |
745 | subs->hwptr_done -= runtime->buffer_size * stride; | |
746 | runtime->delay += frames; | |
747 | spin_unlock_irqrestore(&subs->lock, flags); | |
748 | urb->transfer_buffer_length = bytes; | |
749 | if (period_elapsed) | |
750 | snd_pcm_period_elapsed(subs->pcm_substream); | |
751 | return 0; | |
752 | } | |
753 | ||
754 | /* | |
755 | * process after playback data complete | |
756 | * - decrease the delay count again | |
757 | */ | |
758 | static int retire_playback_urb(struct snd_usb_substream *subs, | |
759 | struct snd_pcm_runtime *runtime, | |
760 | struct urb *urb) | |
761 | { | |
762 | unsigned long flags; | |
763 | int stride = runtime->frame_bits >> 3; | |
764 | int processed = urb->transfer_buffer_length / stride; | |
765 | ||
766 | spin_lock_irqsave(&subs->lock, flags); | |
767 | if (processed > runtime->delay) | |
768 | runtime->delay = 0; | |
769 | else | |
770 | runtime->delay -= processed; | |
771 | spin_unlock_irqrestore(&subs->lock, flags); | |
772 | return 0; | |
773 | } | |
774 | ||
775 | static const char *usb_error_string(int err) | |
776 | { | |
777 | switch (err) { | |
778 | case -ENODEV: | |
779 | return "no device"; | |
780 | case -ENOENT: | |
781 | return "endpoint not enabled"; | |
782 | case -EPIPE: | |
783 | return "endpoint stalled"; | |
784 | case -ENOSPC: | |
785 | return "not enough bandwidth"; | |
786 | case -ESHUTDOWN: | |
787 | return "device disabled"; | |
788 | case -EHOSTUNREACH: | |
789 | return "device suspended"; | |
790 | case -EINVAL: | |
791 | case -EAGAIN: | |
792 | case -EFBIG: | |
793 | case -EMSGSIZE: | |
794 | return "internal error"; | |
795 | default: | |
796 | return "unknown error"; | |
797 | } | |
798 | } | |
799 | ||
800 | /* | |
801 | * set up and start data/sync urbs | |
802 | */ | |
803 | static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime) | |
804 | { | |
805 | unsigned int i; | |
806 | int err; | |
807 | ||
808 | if (subs->stream->chip->shutdown) | |
809 | return -EBADFD; | |
810 | ||
811 | for (i = 0; i < subs->nurbs; i++) { | |
812 | if (snd_BUG_ON(!subs->dataurb[i].urb)) | |
813 | return -EINVAL; | |
814 | if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) { | |
815 | snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i); | |
816 | goto __error; | |
817 | } | |
818 | } | |
819 | if (subs->syncpipe) { | |
820 | for (i = 0; i < SYNC_URBS; i++) { | |
821 | if (snd_BUG_ON(!subs->syncurb[i].urb)) | |
822 | return -EINVAL; | |
823 | if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) { | |
824 | snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i); | |
825 | goto __error; | |
826 | } | |
827 | } | |
828 | } | |
829 | ||
830 | subs->active_mask = 0; | |
831 | subs->unlink_mask = 0; | |
832 | subs->running = 1; | |
833 | for (i = 0; i < subs->nurbs; i++) { | |
834 | err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC); | |
835 | if (err < 0) { | |
836 | snd_printk(KERN_ERR "cannot submit datapipe " | |
837 | "for urb %d, error %d: %s\n", | |
838 | i, err, usb_error_string(err)); | |
839 | goto __error; | |
840 | } | |
841 | set_bit(i, &subs->active_mask); | |
842 | } | |
843 | if (subs->syncpipe) { | |
844 | for (i = 0; i < SYNC_URBS; i++) { | |
845 | err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC); | |
846 | if (err < 0) { | |
847 | snd_printk(KERN_ERR "cannot submit syncpipe " | |
848 | "for urb %d, error %d: %s\n", | |
849 | i, err, usb_error_string(err)); | |
850 | goto __error; | |
851 | } | |
852 | set_bit(i + 16, &subs->active_mask); | |
853 | } | |
854 | } | |
855 | return 0; | |
856 | ||
857 | __error: | |
858 | // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN); | |
859 | deactivate_urbs(subs, 0, 0); | |
860 | return -EPIPE; | |
861 | } | |
862 | ||
863 | ||
864 | /* | |
865 | */ | |
866 | static struct snd_urb_ops audio_urb_ops[2] = { | |
867 | { | |
868 | .prepare = prepare_nodata_playback_urb, | |
869 | .retire = retire_playback_urb, | |
870 | .prepare_sync = prepare_playback_sync_urb, | |
871 | .retire_sync = retire_playback_sync_urb, | |
872 | }, | |
873 | { | |
874 | .prepare = prepare_capture_urb, | |
875 | .retire = retire_capture_urb, | |
876 | .prepare_sync = prepare_capture_sync_urb, | |
877 | .retire_sync = retire_capture_sync_urb, | |
878 | }, | |
879 | }; | |
880 | ||
881 | static struct snd_urb_ops audio_urb_ops_high_speed[2] = { | |
882 | { | |
883 | .prepare = prepare_nodata_playback_urb, | |
884 | .retire = retire_playback_urb, | |
885 | .prepare_sync = prepare_playback_sync_urb_hs, | |
886 | .retire_sync = retire_playback_sync_urb_hs, | |
887 | }, | |
888 | { | |
889 | .prepare = prepare_capture_urb, | |
890 | .retire = retire_capture_urb, | |
891 | .prepare_sync = prepare_capture_sync_urb_hs, | |
892 | .retire_sync = retire_capture_sync_urb, | |
893 | }, | |
894 | }; | |
895 | ||
896 | /* | |
897 | * initialize the substream instance. | |
898 | */ | |
899 | ||
900 | void snd_usb_init_substream(struct snd_usb_stream *as, | |
901 | int stream, struct audioformat *fp) | |
902 | { | |
903 | struct snd_usb_substream *subs = &as->substream[stream]; | |
904 | ||
905 | INIT_LIST_HEAD(&subs->fmt_list); | |
906 | spin_lock_init(&subs->lock); | |
907 | ||
908 | subs->stream = as; | |
909 | subs->direction = stream; | |
910 | subs->dev = as->chip->dev; | |
911 | subs->txfr_quirk = as->chip->txfr_quirk; | |
912 | if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) { | |
913 | subs->ops = audio_urb_ops[stream]; | |
914 | } else { | |
915 | subs->ops = audio_urb_ops_high_speed[stream]; | |
916 | switch (as->chip->usb_id) { | |
917 | case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */ | |
918 | case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */ | |
919 | case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */ | |
920 | subs->ops.retire_sync = retire_playback_sync_urb_hs_emu; | |
921 | break; | |
fca5bca4 FH |
922 | case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra 8 */ |
923 | case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */ | |
924 | subs->ops.prepare_sync = prepare_playback_sync_urb; | |
925 | subs->ops.retire_sync = retire_playback_sync_urb; | |
926 | break; | |
e5779998 DM |
927 | } |
928 | } | |
929 | ||
930 | snd_usb_set_pcm_ops(as->pcm, stream); | |
931 | ||
932 | list_add_tail(&fp->list, &subs->fmt_list); | |
015eb0b0 | 933 | subs->formats |= fp->formats; |
e5779998 DM |
934 | subs->endpoint = fp->endpoint; |
935 | subs->num_formats++; | |
936 | subs->fmt_type = fp->fmt_type; | |
937 | } | |
938 | ||
939 | int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd) | |
940 | { | |
941 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
942 | ||
943 | switch (cmd) { | |
944 | case SNDRV_PCM_TRIGGER_START: | |
945 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
946 | subs->ops.prepare = prepare_playback_urb; | |
947 | return 0; | |
948 | case SNDRV_PCM_TRIGGER_STOP: | |
949 | return deactivate_urbs(subs, 0, 0); | |
950 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
951 | subs->ops.prepare = prepare_nodata_playback_urb; | |
952 | return 0; | |
953 | } | |
954 | ||
955 | return -EINVAL; | |
956 | } | |
957 | ||
958 | int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd) | |
959 | { | |
960 | struct snd_usb_substream *subs = substream->runtime->private_data; | |
961 | ||
962 | switch (cmd) { | |
963 | case SNDRV_PCM_TRIGGER_START: | |
964 | subs->ops.retire = retire_capture_urb; | |
965 | return start_urbs(subs, substream->runtime); | |
966 | case SNDRV_PCM_TRIGGER_STOP: | |
967 | return deactivate_urbs(subs, 0, 0); | |
968 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
969 | subs->ops.retire = retire_paused_capture_urb; | |
970 | return 0; | |
971 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
972 | subs->ops.retire = retire_capture_urb; | |
973 | return 0; | |
974 | } | |
975 | ||
976 | return -EINVAL; | |
977 | } | |
978 | ||
979 | int snd_usb_substream_prepare(struct snd_usb_substream *subs, | |
980 | struct snd_pcm_runtime *runtime) | |
981 | { | |
982 | /* clear urbs (to be sure) */ | |
983 | deactivate_urbs(subs, 0, 1); | |
984 | wait_clear_urbs(subs); | |
985 | ||
986 | /* for playback, submit the URBs now; otherwise, the first hwptr_done | |
987 | * updates for all URBs would happen at the same time when starting */ | |
988 | if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) { | |
989 | subs->ops.prepare = prepare_nodata_playback_urb; | |
990 | return start_urbs(subs, runtime); | |
991 | } | |
992 | ||
993 | return 0; | |
994 | } | |
995 |