Blame view
sound/usb/pcm.c
25.8 KB
e5779998b ALSA: usb-audio: ... |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/init.h> |
9966ddafe ALSA: usb pcm: us... |
18 |
#include <linux/slab.h> |
e5779998b ALSA: usb-audio: ... |
19 20 |
#include <linux/usb.h> #include <linux/usb/audio.h> |
7e8478940 linux/usb/audio.h... |
21 |
#include <linux/usb/audio-v2.h> |
e5779998b ALSA: usb-audio: ... |
22 23 24 25 26 27 28 29 30 |
#include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include "usbaudio.h" #include "card.h" #include "quirks.h" #include "debug.h" |
c731bc96a ALSA: snd-usb: mo... |
31 |
#include "endpoint.h" |
e5779998b ALSA: usb-audio: ... |
32 33 |
#include "helper.h" #include "pcm.h" |
79f920fbf ALSA: usb-audio: ... |
34 |
#include "clock.h" |
88a8516a2 ALSA: usbaudio: i... |
35 |
#include "power.h" |
e5779998b ALSA: usb-audio: ... |
36 |
|
294c4fb8a ALSA: usb: refine... |
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 |
/* return the estimated delay based on USB frame counters */ snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs, unsigned int rate) { int current_frame_number; int frame_diff; int est_delay; current_frame_number = usb_get_current_frame_number(subs->dev); /* * HCD implementations use different widths, use lower 8 bits. * The delay will be managed up to 256ms, which is more than * enough */ frame_diff = (current_frame_number - subs->last_frame_number) & 0xff; /* Approximation based on number of samples per USB frame (ms), some truncation for 44.1 but the estimate is good enough */ est_delay = subs->last_delay - (frame_diff * rate / 1000); if (est_delay < 0) est_delay = 0; return est_delay; } |
e5779998b ALSA: usb-audio: ... |
60 61 62 63 64 65 66 67 68 69 70 |
/* * return the current pcm pointer. just based on the hwptr_done value. */ static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream) { struct snd_usb_substream *subs; unsigned int hwptr_done; subs = (struct snd_usb_substream *)substream->runtime->private_data; spin_lock(&subs->lock); hwptr_done = subs->hwptr_done; |
294c4fb8a ALSA: usb: refine... |
71 72 |
substream->runtime->delay = snd_usb_pcm_delay(subs, substream->runtime->rate); |
e5779998b ALSA: usb-audio: ... |
73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 |
spin_unlock(&subs->lock); return hwptr_done / (substream->runtime->frame_bits >> 3); } /* * find a matching audio format */ static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format, unsigned int rate, unsigned int channels) { struct list_head *p; struct audioformat *found = NULL; int cur_attr = 0, attr; list_for_each(p, &subs->fmt_list) { struct audioformat *fp; fp = list_entry(p, struct audioformat, list); |
015eb0b08 ALSA: usb-audio: ... |
90 91 92 |
if (!(fp->formats & (1uLL << format))) continue; if (fp->channels != channels) |
e5779998b ALSA: usb-audio: ... |
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 |
continue; if (rate < fp->rate_min || rate > fp->rate_max) continue; if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) { unsigned int i; for (i = 0; i < fp->nr_rates; i++) if (fp->rate_table[i] == rate) break; if (i >= fp->nr_rates) continue; } attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE; if (! found) { found = fp; cur_attr = attr; continue; } /* avoid async out and adaptive in if the other method * supports the same format. * this is a workaround for the case like * M-audio audiophile USB. */ if (attr != cur_attr) { if ((attr == USB_ENDPOINT_SYNC_ASYNC && subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || (attr == USB_ENDPOINT_SYNC_ADAPTIVE && subs->direction == SNDRV_PCM_STREAM_CAPTURE)) continue; if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC && subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE && subs->direction == SNDRV_PCM_STREAM_CAPTURE)) { found = fp; cur_attr = attr; continue; } } /* find the format with the largest max. packet size */ if (fp->maxpacksize > found->maxpacksize) { found = fp; cur_attr = attr; } } return found; } |
767d75ad1 ALSA: usb-audio: ... |
138 139 140 141 142 143 144 145 146 147 |
static int init_pitch_v1(struct snd_usb_audio *chip, int iface, struct usb_host_interface *alts, struct audioformat *fmt) { struct usb_device *dev = chip->dev; unsigned int ep; unsigned char data[1]; int err; ep = get_endpoint(alts, 0)->bEndpointAddress; |
767d75ad1 ALSA: usb-audio: ... |
148 149 150 151 |
data[0] = 1; if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, |
17d900c4a ALSA: usb-audio: ... |
152 |
data, sizeof(data))) < 0) { |
767d75ad1 ALSA: usb-audio: ... |
153 154 155 156 157 158 159 160 |
snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH ", dev->devnum, iface, ep); return err; } return 0; } |
e5779998b ALSA: usb-audio: ... |
161 |
|
92c256110 ALSA: usb-audio: ... |
162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 |
static int init_pitch_v2(struct snd_usb_audio *chip, int iface, struct usb_host_interface *alts, struct audioformat *fmt) { struct usb_device *dev = chip->dev; unsigned char data[1]; unsigned int ep; int err; ep = get_endpoint(alts, 0)->bEndpointAddress; data[0] = 1; if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, UAC2_EP_CS_PITCH << 8, 0, |
17d900c4a ALSA: usb-audio: ... |
177 |
data, sizeof(data))) < 0) { |
92c256110 ALSA: usb-audio: ... |
178 179 180 181 182 183 184 185 |
snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2) ", dev->devnum, iface, fmt->altsetting); return err; } return 0; } |
e5779998b ALSA: usb-audio: ... |
186 |
/* |
92c256110 ALSA: usb-audio: ... |
187 |
* initialize the pitch control and sample rate |
e5779998b ALSA: usb-audio: ... |
188 |
*/ |
767d75ad1 ALSA: usb-audio: ... |
189 |
int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface, |
e5779998b ALSA: usb-audio: ... |
190 191 192 |
struct usb_host_interface *alts, struct audioformat *fmt) { |
767d75ad1 ALSA: usb-audio: ... |
193 |
struct usb_interface_descriptor *altsd = get_iface_desc(alts); |
92c256110 ALSA: usb-audio: ... |
194 195 196 |
/* if endpoint doesn't have pitch control, bail out */ if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) return 0; |
767d75ad1 ALSA: usb-audio: ... |
197 198 |
switch (altsd->bInterfaceProtocol) { case UAC_VERSION_1: |
a2acad829 ALSA: usb-audio: ... |
199 |
default: |
767d75ad1 ALSA: usb-audio: ... |
200 201 202 |
return init_pitch_v1(chip, iface, alts, fmt); case UAC_VERSION_2: |
92c256110 ALSA: usb-audio: ... |
203 |
return init_pitch_v2(chip, iface, alts, fmt); |
767d75ad1 ALSA: usb-audio: ... |
204 |
} |
767d75ad1 ALSA: usb-audio: ... |
205 |
} |
e5779998b ALSA: usb-audio: ... |
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 |
/* * find a matching format and set up the interface */ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt) { struct usb_device *dev = subs->dev; struct usb_host_interface *alts; struct usb_interface_descriptor *altsd; struct usb_interface *iface; unsigned int ep, attr; int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; int err; iface = usb_ifnum_to_if(dev, fmt->iface); if (WARN_ON(!iface)) return -EINVAL; alts = &iface->altsetting[fmt->altset_idx]; altsd = get_iface_desc(alts); if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting)) return -EINVAL; if (fmt == subs->cur_audiofmt) return 0; /* close the old interface */ if (subs->interface >= 0 && subs->interface != fmt->iface) { if (usb_set_interface(subs->dev, subs->interface, 0) < 0) { snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed ", dev->devnum, fmt->iface, fmt->altsetting); return -EIO; } subs->interface = -1; |
e11b4e0e4 ALSA: usb-audio: ... |
239 |
subs->altset_idx = 0; |
e5779998b ALSA: usb-audio: ... |
240 241 242 |
} /* set interface */ |
e11b4e0e4 ALSA: usb-audio: ... |
243 |
if (subs->interface != fmt->iface || subs->altset_idx != fmt->altset_idx) { |
e5779998b ALSA: usb-audio: ... |
244 245 246 247 248 249 250 251 252 |
if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) { snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed ", dev->devnum, fmt->iface, fmt->altsetting); return -EIO; } snd_printdd(KERN_INFO "setting usb interface %d:%d ", fmt->iface, fmt->altsetting); subs->interface = fmt->iface; |
e11b4e0e4 ALSA: usb-audio: ... |
253 |
subs->altset_idx = fmt->altset_idx; |
e5779998b ALSA: usb-audio: ... |
254 255 256 257 258 259 260 261 262 263 264 |
} /* create a data pipe */ ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK; if (is_playback) subs->datapipe = usb_sndisocpipe(dev, ep); else subs->datapipe = usb_rcvisocpipe(dev, ep); subs->datainterval = fmt->datainterval; subs->syncpipe = subs->syncinterval = 0; subs->maxpacksize = fmt->maxpacksize; |
89e1e66d6 ALSA: usb-audio: ... |
265 |
subs->syncmaxsize = 0; |
e5779998b ALSA: usb-audio: ... |
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 |
subs->fill_max = 0; /* we need a sync pipe in async OUT or adaptive IN mode */ /* check the number of EP, since some devices have broken * descriptors which fool us. if it has only one EP, * assume it as adaptive-out or sync-in. */ attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) || (! is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) && altsd->bNumEndpoints >= 2) { /* check sync-pipe endpoint */ /* ... and check descriptor size before accessing bSynchAddress because there is a version of the SB Audigy 2 NX firmware lacking the audio fields in the endpoint descriptors */ if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 || (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && get_endpoint(alts, 1)->bSynchAddress != 0)) { snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe ", dev->devnum, fmt->iface, fmt->altsetting); return -EINVAL; } ep = get_endpoint(alts, 1)->bEndpointAddress; if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe ", dev->devnum, fmt->iface, fmt->altsetting); return -EINVAL; } ep &= USB_ENDPOINT_NUMBER_MASK; if (is_playback) subs->syncpipe = usb_rcvisocpipe(dev, ep); else subs->syncpipe = usb_sndisocpipe(dev, ep); if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && get_endpoint(alts, 1)->bRefresh >= 1 && get_endpoint(alts, 1)->bRefresh <= 9) subs->syncinterval = get_endpoint(alts, 1)->bRefresh; else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) subs->syncinterval = 1; else if (get_endpoint(alts, 1)->bInterval >= 1 && get_endpoint(alts, 1)->bInterval <= 16) subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1; else subs->syncinterval = 3; |
89e1e66d6 ALSA: usb-audio: ... |
314 |
subs->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize); |
e5779998b ALSA: usb-audio: ... |
315 316 317 318 319 |
} /* always fill max packet size */ if (fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX) subs->fill_max = 1; |
767d75ad1 ALSA: usb-audio: ... |
320 |
if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0) |
e5779998b ALSA: usb-audio: ... |
321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 |
return err; subs->cur_audiofmt = fmt; snd_usb_set_format_quirk(subs, fmt); #if 0 printk(KERN_DEBUG "setting done: format = %d, rate = %d..%d, channels = %d ", fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels); printk(KERN_DEBUG " datapipe = 0x%0x, syncpipe = 0x%0x ", subs->datapipe, subs->syncpipe); #endif return 0; } /* * hw_params callback * * allocate a buffer and set the given audio format. * * so far we use a physically linear buffer although packetize transfer * doesn't need a continuous area. * if sg buffer is supported on the later version of alsa, we'll follow * that. */ static int snd_usb_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct snd_usb_substream *subs = substream->runtime->private_data; struct audioformat *fmt; unsigned int channels, rate, format; int ret, changed; ret = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); if (ret < 0) return ret; format = params_format(hw_params); rate = params_rate(hw_params); channels = params_channels(hw_params); fmt = find_format(subs, format, rate, channels); if (!fmt) { snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d ", format, rate, channels); return -EINVAL; } changed = subs->cur_audiofmt != fmt || subs->period_bytes != params_period_bytes(hw_params) || subs->cur_rate != rate; if ((ret = set_format(subs, fmt)) < 0) return ret; if (subs->cur_rate != rate) { struct usb_host_interface *alts; struct usb_interface *iface; iface = usb_ifnum_to_if(subs->dev, fmt->iface); alts = &iface->altsetting[fmt->altset_idx]; |
767d75ad1 ALSA: usb-audio: ... |
386 |
ret = snd_usb_init_sample_rate(subs->stream->chip, subs->interface, alts, fmt, rate); |
e5779998b ALSA: usb-audio: ... |
387 388 389 390 391 392 |
if (ret < 0) return ret; subs->cur_rate = rate; } if (changed) { |
382225e62 ALSA: usb-audio: ... |
393 |
mutex_lock(&subs->stream->chip->shutdown_mutex); |
e5779998b ALSA: usb-audio: ... |
394 395 396 397 398 399 400 |
/* format changed */ snd_usb_release_substream_urbs(subs, 0); /* influenced: period_bytes, channels, rate, format, */ ret = snd_usb_init_substream_urbs(subs, params_period_bytes(hw_params), params_rate(hw_params), snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params)); |
382225e62 ALSA: usb-audio: ... |
401 |
mutex_unlock(&subs->stream->chip->shutdown_mutex); |
e5779998b ALSA: usb-audio: ... |
402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 |
} return ret; } /* * hw_free callback * * reset the audio format and release the buffer */ static int snd_usb_hw_free(struct snd_pcm_substream *substream) { struct snd_usb_substream *subs = substream->runtime->private_data; subs->cur_audiofmt = NULL; subs->cur_rate = 0; subs->period_bytes = 0; |
382225e62 ALSA: usb-audio: ... |
419 420 421 |
mutex_lock(&subs->stream->chip->shutdown_mutex); snd_usb_release_substream_urbs(subs, 0); mutex_unlock(&subs->stream->chip->shutdown_mutex); |
e5779998b ALSA: usb-audio: ... |
422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 |
return snd_pcm_lib_free_vmalloc_buffer(substream); } /* * prepare callback * * only a few subtle things... */ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usb_substream *subs = runtime->private_data; if (! subs->cur_audiofmt) { snd_printk(KERN_ERR "usbaudio: no format is specified! "); return -ENXIO; } /* some unit conversions in runtime */ subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize); subs->curframesize = bytes_to_frames(runtime, subs->curpacksize); /* reset the pointer */ subs->hwptr_done = 0; subs->transfer_done = 0; subs->phase = 0; |
294c4fb8a ALSA: usb: refine... |
449 450 |
subs->last_delay = 0; subs->last_frame_number = 0; |
e5779998b ALSA: usb-audio: ... |
451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 |
runtime->delay = 0; return snd_usb_substream_prepare(subs, runtime); } static struct snd_pcm_hardware snd_usb_hardware = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE, .buffer_bytes_max = 1024 * 1024, .period_bytes_min = 64, .period_bytes_max = 512 * 1024, .periods_min = 2, .periods_max = 1024, }; static int hw_check_valid_format(struct snd_usb_substream *subs, struct snd_pcm_hw_params *params, struct audioformat *fp) { struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); |
015eb0b08 ALSA: usb-audio: ... |
479 |
struct snd_mask check_fmts; |
e5779998b ALSA: usb-audio: ... |
480 481 482 |
unsigned int ptime; /* check the format */ |
015eb0b08 ALSA: usb-audio: ... |
483 484 485 486 487 |
snd_mask_none(&check_fmts); check_fmts.bits[0] = (u32)fp->formats; check_fmts.bits[1] = (u32)(fp->formats >> 32); snd_mask_intersect(&check_fmts, fmts); if (snd_mask_empty(&check_fmts)) { |
e5779998b ALSA: usb-audio: ... |
488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 |
hwc_debug(" > check: no supported format %d ", fp->format); return 0; } /* check the channels */ if (fp->channels < ct->min || fp->channels > ct->max) { hwc_debug(" > check: no valid channels %d (%d/%d) ", fp->channels, ct->min, ct->max); return 0; } /* check the rate is within the range */ if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { hwc_debug(" > check: rate_min %d > max %d ", fp->rate_min, it->max); return 0; } if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { hwc_debug(" > check: rate_max %d < min %d ", fp->rate_max, it->min); return 0; } /* check whether the period time is >= the data packet interval */ |
4f4e8f698 ALSA: usb: USB3 S... |
510 |
if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) { |
e5779998b ALSA: usb-audio: ... |
511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 |
ptime = 125 * (1 << fp->datainterval); if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { hwc_debug(" > check: ptime %u > max %u ", ptime, pt->max); return 0; } } return 1; } static int hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; struct list_head *p; struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); unsigned int rmin, rmax; int changed; hwc_debug("hw_rule_rate: (%d,%d) ", it->min, it->max); changed = 0; rmin = rmax = 0; list_for_each(p, &subs->fmt_list) { struct audioformat *fp; fp = list_entry(p, struct audioformat, list); if (!hw_check_valid_format(subs, params, fp)) continue; if (changed++) { if (rmin > fp->rate_min) rmin = fp->rate_min; if (rmax < fp->rate_max) rmax = fp->rate_max; } else { rmin = fp->rate_min; rmax = fp->rate_max; } } if (!changed) { hwc_debug(" --> get empty "); it->empty = 1; return -EINVAL; } changed = 0; if (it->min < rmin) { it->min = rmin; it->openmin = 0; changed = 1; } if (it->max > rmax) { it->max = rmax; it->openmax = 0; changed = 1; } if (snd_interval_checkempty(it)) { it->empty = 1; return -EINVAL; } hwc_debug(" --> (%d, %d) (changed = %d) ", it->min, it->max, changed); return changed; } static int hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; struct list_head *p; struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); unsigned int rmin, rmax; int changed; hwc_debug("hw_rule_channels: (%d,%d) ", it->min, it->max); changed = 0; rmin = rmax = 0; list_for_each(p, &subs->fmt_list) { struct audioformat *fp; fp = list_entry(p, struct audioformat, list); if (!hw_check_valid_format(subs, params, fp)) continue; if (changed++) { if (rmin > fp->channels) rmin = fp->channels; if (rmax < fp->channels) rmax = fp->channels; } else { rmin = fp->channels; rmax = fp->channels; } } if (!changed) { hwc_debug(" --> get empty "); it->empty = 1; return -EINVAL; } changed = 0; if (it->min < rmin) { it->min = rmin; it->openmin = 0; changed = 1; } if (it->max > rmax) { it->max = rmax; it->openmax = 0; changed = 1; } if (snd_interval_checkempty(it)) { it->empty = 1; return -EINVAL; } hwc_debug(" --> (%d, %d) (changed = %d) ", it->min, it->max, changed); return changed; } static int hw_rule_format(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; struct list_head *p; struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); u64 fbits; u32 oldbits[2]; int changed; hwc_debug("hw_rule_format: %x:%x ", fmt->bits[0], fmt->bits[1]); fbits = 0; list_for_each(p, &subs->fmt_list) { struct audioformat *fp; fp = list_entry(p, struct audioformat, list); if (!hw_check_valid_format(subs, params, fp)) continue; |
015eb0b08 ALSA: usb-audio: ... |
652 |
fbits |= fp->formats; |
e5779998b ALSA: usb-audio: ... |
653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 |
} oldbits[0] = fmt->bits[0]; oldbits[1] = fmt->bits[1]; fmt->bits[0] &= (u32)fbits; fmt->bits[1] &= (u32)(fbits >> 32); if (!fmt->bits[0] && !fmt->bits[1]) { hwc_debug(" --> get empty "); return -EINVAL; } changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); hwc_debug(" --> %x:%x (changed = %d) ", fmt->bits[0], fmt->bits[1], changed); return changed; } static int hw_rule_period_time(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; struct audioformat *fp; struct snd_interval *it; unsigned char min_datainterval; unsigned int pmin; int changed; it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); hwc_debug("hw_rule_period_time: (%u,%u) ", it->min, it->max); min_datainterval = 0xff; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; min_datainterval = min(min_datainterval, fp->datainterval); } if (min_datainterval == 0xff) { |
a7ce2e0d0 fix comnment/prin... |
690 691 |
hwc_debug(" --> get empty "); |
e5779998b ALSA: usb-audio: ... |
692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 |
it->empty = 1; return -EINVAL; } pmin = 125 * (1 << min_datainterval); changed = 0; if (it->min < pmin) { it->min = pmin; it->openmin = 0; changed = 1; } if (snd_interval_checkempty(it)) { it->empty = 1; return -EINVAL; } hwc_debug(" --> (%u,%u) (changed = %d) ", it->min, it->max, changed); return changed; } /* * If the device supports unusual bit rates, does the request meet these? */ static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) { struct audioformat *fp; int count = 0, needs_knot = 0; int err; list_for_each_entry(fp, &subs->fmt_list, list) { if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) return 0; count += fp->nr_rates; if (fp->rates & SNDRV_PCM_RATE_KNOT) needs_knot = 1; } if (!needs_knot) return 0; |
e5779998b ALSA: usb-audio: ... |
730 |
subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL); |
8a8d56b2a ALSA: usb - drive... |
731 732 733 |
if (!subs->rate_list.list) return -ENOMEM; subs->rate_list.count = count; |
e5779998b ALSA: usb-audio: ... |
734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 |
subs->rate_list.mask = 0; count = 0; list_for_each_entry(fp, &subs->fmt_list, list) { int i; for (i = 0; i < fp->nr_rates; i++) subs->rate_list.list[count++] = fp->rate_table[i]; } err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &subs->rate_list); if (err < 0) return err; return 0; } /* * set up the runtime hardware information. */ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) { struct list_head *p; unsigned int pt, ptmin; int param_period_time_if_needed; int err; runtime->hw.formats = subs->formats; runtime->hw.rate_min = 0x7fffffff; runtime->hw.rate_max = 0; runtime->hw.channels_min = 256; runtime->hw.channels_max = 0; runtime->hw.rates = 0; ptmin = UINT_MAX; /* check min/max rates and channels */ list_for_each(p, &subs->fmt_list) { struct audioformat *fp; fp = list_entry(p, struct audioformat, list); runtime->hw.rates |= fp->rates; if (runtime->hw.rate_min > fp->rate_min) runtime->hw.rate_min = fp->rate_min; if (runtime->hw.rate_max < fp->rate_max) runtime->hw.rate_max = fp->rate_max; if (runtime->hw.channels_min > fp->channels) runtime->hw.channels_min = fp->channels; if (runtime->hw.channels_max < fp->channels) runtime->hw.channels_max = fp->channels; if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { /* FIXME: there might be more than one audio formats... */ runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = fp->frame_size; } pt = 125 * (1 << fp->datainterval); ptmin = min(ptmin, pt); } |
88a8516a2 ALSA: usbaudio: i... |
790 791 792 |
err = snd_usb_autoresume(subs->stream->chip); if (err < 0) return err; |
e5779998b ALSA: usb-audio: ... |
793 794 |
param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; |
4f4e8f698 ALSA: usb: USB3 S... |
795 |
if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) |
e5779998b ALSA: usb-audio: ... |
796 797 798 799 800 801 802 803 804 805 806 807 808 809 |
/* full speed devices have fixed data packet interval */ ptmin = 1000; if (ptmin == 1000) /* if period time doesn't go below 1 ms, no rules needed */ param_period_time_if_needed = -1; snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, ptmin, UINT_MAX); if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, hw_rule_rate, subs, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_CHANNELS, param_period_time_if_needed, -1)) < 0) |
88a8516a2 ALSA: usbaudio: i... |
810 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
811 812 813 814 815 816 |
if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, hw_rule_channels, subs, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_RATE, param_period_time_if_needed, -1)) < 0) |
88a8516a2 ALSA: usbaudio: i... |
817 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
818 819 820 821 822 823 |
if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, hw_rule_format, subs, SNDRV_PCM_HW_PARAM_RATE, SNDRV_PCM_HW_PARAM_CHANNELS, param_period_time_if_needed, -1)) < 0) |
88a8516a2 ALSA: usbaudio: i... |
824 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
825 826 827 828 829 830 831 832 833 |
if (param_period_time_if_needed >= 0) { err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, hw_rule_period_time, subs, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_CHANNELS, SNDRV_PCM_HW_PARAM_RATE, -1); if (err < 0) |
88a8516a2 ALSA: usbaudio: i... |
834 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
835 836 |
} if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0) |
88a8516a2 ALSA: usbaudio: i... |
837 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
838 |
return 0; |
88a8516a2 ALSA: usbaudio: i... |
839 840 841 842 |
rep_err: snd_usb_autosuspend(subs->stream->chip); return err; |
e5779998b ALSA: usb-audio: ... |
843 844 845 846 847 848 849 850 851 |
} static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction) { struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usb_substream *subs = &as->substream[direction]; subs->interface = -1; |
e11b4e0e4 ALSA: usb-audio: ... |
852 |
subs->altset_idx = 0; |
e5779998b ALSA: usb-audio: ... |
853 854 855 |
runtime->hw = snd_usb_hardware; runtime->private_data = subs; subs->pcm_substream = substream; |
88a8516a2 ALSA: usbaudio: i... |
856 |
/* runtime PM is also done there */ |
e5779998b ALSA: usb-audio: ... |
857 858 859 860 861 862 863 864 865 866 867 868 869 |
return setup_hw_info(runtime, subs); } static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction) { struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_usb_substream *subs = &as->substream[direction]; if (!as->chip->shutdown && subs->interface >= 0) { usb_set_interface(subs->dev, subs->interface, 0); subs->interface = -1; } subs->pcm_substream = NULL; |
88a8516a2 ALSA: usbaudio: i... |
870 |
snd_usb_autosuspend(subs->stream->chip); |
e5779998b ALSA: usb-audio: ... |
871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 |
return 0; } static int snd_usb_playback_open(struct snd_pcm_substream *substream) { return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK); } static int snd_usb_playback_close(struct snd_pcm_substream *substream) { return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK); } static int snd_usb_capture_open(struct snd_pcm_substream *substream) { return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE); } static int snd_usb_capture_close(struct snd_pcm_substream *substream) { return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE); } static struct snd_pcm_ops snd_usb_playback_ops = { .open = snd_usb_playback_open, .close = snd_usb_playback_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_usb_hw_params, .hw_free = snd_usb_hw_free, .prepare = snd_usb_pcm_prepare, .trigger = snd_usb_substream_playback_trigger, .pointer = snd_usb_pcm_pointer, .page = snd_pcm_lib_get_vmalloc_page, .mmap = snd_pcm_lib_mmap_vmalloc, }; static struct snd_pcm_ops snd_usb_capture_ops = { .open = snd_usb_capture_open, .close = snd_usb_capture_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_usb_hw_params, .hw_free = snd_usb_hw_free, .prepare = snd_usb_pcm_prepare, .trigger = snd_usb_substream_capture_trigger, .pointer = snd_usb_pcm_pointer, .page = snd_pcm_lib_get_vmalloc_page, .mmap = snd_pcm_lib_mmap_vmalloc, }; void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) { snd_pcm_set_ops(pcm, stream, stream == SNDRV_PCM_STREAM_PLAYBACK ? &snd_usb_playback_ops : &snd_usb_capture_ops); } |