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 #include <linux/init.h> 18 #include <linux/slab.h> 19 #include <linux/ratelimit.h> 20 #include <linux/usb.h> 21 #include <linux/usb/audio.h> 22 #include <linux/usb/audio-v2.h> 23 24 #include <sound/core.h> 25 #include <sound/pcm.h> 26 #include <sound/pcm_params.h> 27 28 #include "usbaudio.h" 29 #include "card.h" 30 #include "quirks.h" 31 #include "debug.h" 32 #include "endpoint.h" 33 #include "helper.h" 34 #include "pcm.h" 35 #include "clock.h" 36 #include "power.h" 37 38 #define SUBSTREAM_FLAG_DATA_EP_STARTED 0 39 #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1 40 41 /* return the estimated delay based on USB frame counters */ 42 snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs, 43 unsigned int rate) 44 { 45 int current_frame_number; 46 int frame_diff; 47 int est_delay; 48 49 current_frame_number = usb_get_current_frame_number(subs->dev); 50 /* 51 * HCD implementations use different widths, use lower 8 bits. 52 * The delay will be managed up to 256ms, which is more than 53 * enough 54 */ 55 frame_diff = (current_frame_number - subs->last_frame_number) & 0xff; 56 57 /* Approximation based on number of samples per USB frame (ms), 58 some truncation for 44.1 but the estimate is good enough */ 59 est_delay = subs->last_delay - (frame_diff * rate / 1000); 60 if (est_delay < 0) 61 est_delay = 0; 62 return est_delay; 63 } 64 65 /* 66 * return the current pcm pointer. just based on the hwptr_done value. 67 */ 68 static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream) 69 { 70 struct snd_usb_substream *subs; 71 unsigned int hwptr_done; 72 73 subs = (struct snd_usb_substream *)substream->runtime->private_data; 74 spin_lock(&subs->lock); 75 hwptr_done = subs->hwptr_done; 76 substream->runtime->delay = snd_usb_pcm_delay(subs, 77 substream->runtime->rate); 78 spin_unlock(&subs->lock); 79 return hwptr_done / (substream->runtime->frame_bits >> 3); 80 } 81 82 /* 83 * find a matching audio format 84 */ 85 static struct audioformat *find_format(struct snd_usb_substream *subs) 86 { 87 struct list_head *p; 88 struct audioformat *found = NULL; 89 int cur_attr = 0, attr; 90 91 list_for_each(p, &subs->fmt_list) { 92 struct audioformat *fp; 93 fp = list_entry(p, struct audioformat, list); 94 if (!(fp->formats & (1uLL << subs->pcm_format))) 95 continue; 96 if (fp->channels != subs->channels) 97 continue; 98 if (subs->cur_rate < fp->rate_min || 99 subs->cur_rate > fp->rate_max) 100 continue; 101 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) { 102 unsigned int i; 103 for (i = 0; i < fp->nr_rates; i++) 104 if (fp->rate_table[i] == subs->cur_rate) 105 break; 106 if (i >= fp->nr_rates) 107 continue; 108 } 109 attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE; 110 if (! found) { 111 found = fp; 112 cur_attr = attr; 113 continue; 114 } 115 /* avoid async out and adaptive in if the other method 116 * supports the same format. 117 * this is a workaround for the case like 118 * M-audio audiophile USB. 119 */ 120 if (attr != cur_attr) { 121 if ((attr == USB_ENDPOINT_SYNC_ASYNC && 122 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || 123 (attr == USB_ENDPOINT_SYNC_ADAPTIVE && 124 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) 125 continue; 126 if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC && 127 subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || 128 (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE && 129 subs->direction == SNDRV_PCM_STREAM_CAPTURE)) { 130 found = fp; 131 cur_attr = attr; 132 continue; 133 } 134 } 135 /* find the format with the largest max. packet size */ 136 if (fp->maxpacksize > found->maxpacksize) { 137 found = fp; 138 cur_attr = attr; 139 } 140 } 141 return found; 142 } 143 144 static int init_pitch_v1(struct snd_usb_audio *chip, int iface, 145 struct usb_host_interface *alts, 146 struct audioformat *fmt) 147 { 148 struct usb_device *dev = chip->dev; 149 unsigned int ep; 150 unsigned char data[1]; 151 int err; 152 153 ep = get_endpoint(alts, 0)->bEndpointAddress; 154 155 data[0] = 1; 156 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, 157 USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, 158 UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, 159 data, sizeof(data))) < 0) { 160 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n", 161 dev->devnum, iface, ep); 162 return err; 163 } 164 165 return 0; 166 } 167 168 static int init_pitch_v2(struct snd_usb_audio *chip, int iface, 169 struct usb_host_interface *alts, 170 struct audioformat *fmt) 171 { 172 struct usb_device *dev = chip->dev; 173 unsigned char data[1]; 174 unsigned int ep; 175 int err; 176 177 ep = get_endpoint(alts, 0)->bEndpointAddress; 178 179 data[0] = 1; 180 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, 181 USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, 182 UAC2_EP_CS_PITCH << 8, 0, 183 data, sizeof(data))) < 0) { 184 snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2)\n", 185 dev->devnum, iface, fmt->altsetting); 186 return err; 187 } 188 189 return 0; 190 } 191 192 /* 193 * initialize the pitch control and sample rate 194 */ 195 int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface, 196 struct usb_host_interface *alts, 197 struct audioformat *fmt) 198 { 199 struct usb_interface_descriptor *altsd = get_iface_desc(alts); 200 201 /* if endpoint doesn't have pitch control, bail out */ 202 if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) 203 return 0; 204 205 switch (altsd->bInterfaceProtocol) { 206 case UAC_VERSION_1: 207 default: 208 return init_pitch_v1(chip, iface, alts, fmt); 209 210 case UAC_VERSION_2: 211 return init_pitch_v2(chip, iface, alts, fmt); 212 } 213 } 214 215 static int start_endpoints(struct snd_usb_substream *subs, int can_sleep) 216 { 217 int err; 218 219 if (!subs->data_endpoint) 220 return -EINVAL; 221 222 if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { 223 struct snd_usb_endpoint *ep = subs->data_endpoint; 224 225 snd_printdd(KERN_DEBUG "Starting data EP @%p\n", ep); 226 227 ep->data_subs = subs; 228 err = snd_usb_endpoint_start(ep, can_sleep); 229 if (err < 0) { 230 clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags); 231 return err; 232 } 233 } 234 235 if (subs->sync_endpoint && 236 !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { 237 struct snd_usb_endpoint *ep = subs->sync_endpoint; 238 239 if (subs->data_endpoint->iface != subs->sync_endpoint->iface || 240 subs->data_endpoint->alt_idx != subs->sync_endpoint->alt_idx) { 241 err = usb_set_interface(subs->dev, 242 subs->sync_endpoint->iface, 243 subs->sync_endpoint->alt_idx); 244 if (err < 0) { 245 snd_printk(KERN_ERR 246 "%d:%d:%d: cannot set interface (%d)\n", 247 subs->dev->devnum, 248 subs->sync_endpoint->iface, 249 subs->sync_endpoint->alt_idx, err); 250 return -EIO; 251 } 252 } 253 254 snd_printdd(KERN_DEBUG "Starting sync EP @%p\n", ep); 255 256 ep->sync_slave = subs->data_endpoint; 257 err = snd_usb_endpoint_start(ep, can_sleep); 258 if (err < 0) { 259 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); 260 return err; 261 } 262 } 263 264 return 0; 265 } 266 267 static void stop_endpoints(struct snd_usb_substream *subs, 268 int force, int can_sleep, int wait) 269 { 270 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) 271 snd_usb_endpoint_stop(subs->sync_endpoint, 272 force, can_sleep, wait); 273 274 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) 275 snd_usb_endpoint_stop(subs->data_endpoint, 276 force, can_sleep, wait); 277 } 278 279 static int deactivate_endpoints(struct snd_usb_substream *subs) 280 { 281 int reta, retb; 282 283 reta = snd_usb_endpoint_deactivate(subs->sync_endpoint); 284 retb = snd_usb_endpoint_deactivate(subs->data_endpoint); 285 286 if (reta < 0) 287 return reta; 288 289 if (retb < 0) 290 return retb; 291 292 return 0; 293 } 294 295 /* 296 * find a matching format and set up the interface 297 */ 298 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt) 299 { 300 struct usb_device *dev = subs->dev; 301 struct usb_host_interface *alts; 302 struct usb_interface_descriptor *altsd; 303 struct usb_interface *iface; 304 unsigned int ep, attr; 305 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; 306 int err, implicit_fb = 0; 307 308 iface = usb_ifnum_to_if(dev, fmt->iface); 309 if (WARN_ON(!iface)) 310 return -EINVAL; 311 alts = &iface->altsetting[fmt->altset_idx]; 312 altsd = get_iface_desc(alts); 313 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting)) 314 return -EINVAL; 315 316 if (fmt == subs->cur_audiofmt) 317 return 0; 318 319 /* close the old interface */ 320 if (subs->interface >= 0 && subs->interface != fmt->iface) { 321 err = usb_set_interface(subs->dev, subs->interface, 0); 322 if (err < 0) { 323 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed (%d)\n", 324 dev->devnum, fmt->iface, fmt->altsetting, err); 325 return -EIO; 326 } 327 subs->interface = -1; 328 subs->altset_idx = 0; 329 } 330 331 /* set interface */ 332 if (subs->interface != fmt->iface || 333 subs->altset_idx != fmt->altset_idx) { 334 err = usb_set_interface(dev, fmt->iface, fmt->altsetting); 335 if (err < 0) { 336 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed (%d)\n", 337 dev->devnum, fmt->iface, fmt->altsetting, err); 338 return -EIO; 339 } 340 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", 341 fmt->iface, fmt->altsetting); 342 subs->interface = fmt->iface; 343 subs->altset_idx = fmt->altset_idx; 344 } 345 346 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip, 347 alts, fmt->endpoint, subs->direction, 348 SND_USB_ENDPOINT_TYPE_DATA); 349 if (!subs->data_endpoint) 350 return -EINVAL; 351 352 /* we need a sync pipe in async OUT or adaptive IN mode */ 353 /* check the number of EP, since some devices have broken 354 * descriptors which fool us. if it has only one EP, 355 * assume it as adaptive-out or sync-in. 356 */ 357 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; 358 359 switch (subs->stream->chip->usb_id) { 360 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */ 361 case USB_ID(0x0763, 0x2081): 362 if (is_playback) { 363 implicit_fb = 1; 364 ep = 0x81; 365 iface = usb_ifnum_to_if(dev, 2); 366 367 if (!iface || iface->num_altsetting == 0) 368 return -EINVAL; 369 370 alts = &iface->altsetting[1]; 371 goto add_sync_ep; 372 } 373 } 374 375 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) || 376 (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) && 377 altsd->bNumEndpoints >= 2) { 378 /* check sync-pipe endpoint */ 379 /* ... and check descriptor size before accessing bSynchAddress 380 because there is a version of the SB Audigy 2 NX firmware lacking 381 the audio fields in the endpoint descriptors */ 382 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 || 383 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && 384 get_endpoint(alts, 1)->bSynchAddress != 0 && 385 !implicit_fb)) { 386 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n", 387 dev->devnum, fmt->iface, fmt->altsetting, 388 get_endpoint(alts, 1)->bmAttributes, 389 get_endpoint(alts, 1)->bLength, 390 get_endpoint(alts, 1)->bSynchAddress); 391 return -EINVAL; 392 } 393 ep = get_endpoint(alts, 1)->bEndpointAddress; 394 if (!implicit_fb && 395 get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && 396 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || 397 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { 398 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n", 399 dev->devnum, fmt->iface, fmt->altsetting, 400 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress); 401 return -EINVAL; 402 } 403 404 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK) 405 == USB_ENDPOINT_USAGE_IMPLICIT_FB; 406 407 add_sync_ep: 408 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip, 409 alts, ep, !subs->direction, 410 implicit_fb ? 411 SND_USB_ENDPOINT_TYPE_DATA : 412 SND_USB_ENDPOINT_TYPE_SYNC); 413 if (!subs->sync_endpoint) 414 return -EINVAL; 415 416 subs->data_endpoint->sync_master = subs->sync_endpoint; 417 } 418 419 if ((err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt)) < 0) 420 return err; 421 422 subs->cur_audiofmt = fmt; 423 424 snd_usb_set_format_quirk(subs, fmt); 425 426 #if 0 427 printk(KERN_DEBUG 428 "setting done: format = %d, rate = %d..%d, channels = %d\n", 429 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels); 430 printk(KERN_DEBUG 431 " datapipe = 0x%0x, syncpipe = 0x%0x\n", 432 subs->datapipe, subs->syncpipe); 433 #endif 434 435 return 0; 436 } 437 438 /* 439 * configure endpoint params 440 * 441 * called during initial setup and upon resume 442 */ 443 static int configure_endpoint(struct snd_usb_substream *subs) 444 { 445 int ret; 446 447 mutex_lock(&subs->stream->chip->shutdown_mutex); 448 /* format changed */ 449 stop_endpoints(subs, 0, 0, 0); 450 ret = snd_usb_endpoint_set_params(subs->data_endpoint, 451 subs->pcm_format, 452 subs->channels, 453 subs->period_bytes, 454 subs->cur_rate, 455 subs->cur_audiofmt, 456 subs->sync_endpoint); 457 if (ret < 0) 458 goto unlock; 459 460 if (subs->sync_endpoint) 461 ret = snd_usb_endpoint_set_params(subs->data_endpoint, 462 subs->pcm_format, 463 subs->channels, 464 subs->period_bytes, 465 subs->cur_rate, 466 subs->cur_audiofmt, 467 NULL); 468 469 unlock: 470 mutex_unlock(&subs->stream->chip->shutdown_mutex); 471 return ret; 472 } 473 474 /* 475 * hw_params callback 476 * 477 * allocate a buffer and set the given audio format. 478 * 479 * so far we use a physically linear buffer although packetize transfer 480 * doesn't need a continuous area. 481 * if sg buffer is supported on the later version of alsa, we'll follow 482 * that. 483 */ 484 static int snd_usb_hw_params(struct snd_pcm_substream *substream, 485 struct snd_pcm_hw_params *hw_params) 486 { 487 struct snd_usb_substream *subs = substream->runtime->private_data; 488 struct audioformat *fmt; 489 int ret; 490 491 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream, 492 params_buffer_bytes(hw_params)); 493 if (ret < 0) 494 return ret; 495 496 subs->pcm_format = params_format(hw_params); 497 subs->period_bytes = params_period_bytes(hw_params); 498 subs->channels = params_channels(hw_params); 499 subs->cur_rate = params_rate(hw_params); 500 501 fmt = find_format(subs); 502 if (!fmt) { 503 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n", 504 subs->pcm_format, subs->cur_rate, subs->channels); 505 return -EINVAL; 506 } 507 508 if ((ret = set_format(subs, fmt)) < 0) 509 return ret; 510 511 subs->interface = fmt->iface; 512 subs->altset_idx = fmt->altset_idx; 513 subs->need_setup_ep = true; 514 515 return 0; 516 } 517 518 /* 519 * hw_free callback 520 * 521 * reset the audio format and release the buffer 522 */ 523 static int snd_usb_hw_free(struct snd_pcm_substream *substream) 524 { 525 struct snd_usb_substream *subs = substream->runtime->private_data; 526 527 subs->cur_audiofmt = NULL; 528 subs->cur_rate = 0; 529 subs->period_bytes = 0; 530 mutex_lock(&subs->stream->chip->shutdown_mutex); 531 stop_endpoints(subs, 0, 1, 1); 532 deactivate_endpoints(subs); 533 mutex_unlock(&subs->stream->chip->shutdown_mutex); 534 return snd_pcm_lib_free_vmalloc_buffer(substream); 535 } 536 537 /* 538 * prepare callback 539 * 540 * only a few subtle things... 541 */ 542 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) 543 { 544 struct snd_pcm_runtime *runtime = substream->runtime; 545 struct snd_usb_substream *subs = runtime->private_data; 546 struct usb_host_interface *alts; 547 struct usb_interface *iface; 548 int ret; 549 550 if (! subs->cur_audiofmt) { 551 snd_printk(KERN_ERR "usbaudio: no format is specified!\n"); 552 return -ENXIO; 553 } 554 555 if (snd_BUG_ON(!subs->data_endpoint)) 556 return -EIO; 557 558 ret = set_format(subs, subs->cur_audiofmt); 559 if (ret < 0) 560 return ret; 561 562 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface); 563 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx]; 564 ret = snd_usb_init_sample_rate(subs->stream->chip, 565 subs->cur_audiofmt->iface, 566 alts, 567 subs->cur_audiofmt, 568 subs->cur_rate); 569 if (ret < 0) 570 return ret; 571 572 if (subs->need_setup_ep) { 573 ret = configure_endpoint(subs); 574 if (ret < 0) 575 return ret; 576 subs->need_setup_ep = false; 577 } 578 579 /* some unit conversions in runtime */ 580 subs->data_endpoint->maxframesize = 581 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize); 582 subs->data_endpoint->curframesize = 583 bytes_to_frames(runtime, subs->data_endpoint->curpacksize); 584 585 /* reset the pointer */ 586 subs->hwptr_done = 0; 587 subs->transfer_done = 0; 588 subs->last_delay = 0; 589 subs->last_frame_number = 0; 590 runtime->delay = 0; 591 592 /* for playback, submit the URBs now; otherwise, the first hwptr_done 593 * updates for all URBs would happen at the same time when starting */ 594 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) 595 return start_endpoints(subs, 1); 596 597 return 0; 598 } 599 600 static struct snd_pcm_hardware snd_usb_hardware = 601 { 602 .info = SNDRV_PCM_INFO_MMAP | 603 SNDRV_PCM_INFO_MMAP_VALID | 604 SNDRV_PCM_INFO_BATCH | 605 SNDRV_PCM_INFO_INTERLEAVED | 606 SNDRV_PCM_INFO_BLOCK_TRANSFER | 607 SNDRV_PCM_INFO_PAUSE, 608 .buffer_bytes_max = 1024 * 1024, 609 .period_bytes_min = 64, 610 .period_bytes_max = 512 * 1024, 611 .periods_min = 2, 612 .periods_max = 1024, 613 }; 614 615 static int hw_check_valid_format(struct snd_usb_substream *subs, 616 struct snd_pcm_hw_params *params, 617 struct audioformat *fp) 618 { 619 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 620 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 621 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 622 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); 623 struct snd_mask check_fmts; 624 unsigned int ptime; 625 626 /* check the format */ 627 snd_mask_none(&check_fmts); 628 check_fmts.bits[0] = (u32)fp->formats; 629 check_fmts.bits[1] = (u32)(fp->formats >> 32); 630 snd_mask_intersect(&check_fmts, fmts); 631 if (snd_mask_empty(&check_fmts)) { 632 hwc_debug(" > check: no supported format %d\n", fp->format); 633 return 0; 634 } 635 /* check the channels */ 636 if (fp->channels < ct->min || fp->channels > ct->max) { 637 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); 638 return 0; 639 } 640 /* check the rate is within the range */ 641 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { 642 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); 643 return 0; 644 } 645 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { 646 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); 647 return 0; 648 } 649 /* check whether the period time is >= the data packet interval */ 650 if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) { 651 ptime = 125 * (1 << fp->datainterval); 652 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { 653 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max); 654 return 0; 655 } 656 } 657 return 1; 658 } 659 660 static int hw_rule_rate(struct snd_pcm_hw_params *params, 661 struct snd_pcm_hw_rule *rule) 662 { 663 struct snd_usb_substream *subs = rule->private; 664 struct list_head *p; 665 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 666 unsigned int rmin, rmax; 667 int changed; 668 669 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); 670 changed = 0; 671 rmin = rmax = 0; 672 list_for_each(p, &subs->fmt_list) { 673 struct audioformat *fp; 674 fp = list_entry(p, struct audioformat, list); 675 if (!hw_check_valid_format(subs, params, fp)) 676 continue; 677 if (changed++) { 678 if (rmin > fp->rate_min) 679 rmin = fp->rate_min; 680 if (rmax < fp->rate_max) 681 rmax = fp->rate_max; 682 } else { 683 rmin = fp->rate_min; 684 rmax = fp->rate_max; 685 } 686 } 687 688 if (!changed) { 689 hwc_debug(" --> get empty\n"); 690 it->empty = 1; 691 return -EINVAL; 692 } 693 694 changed = 0; 695 if (it->min < rmin) { 696 it->min = rmin; 697 it->openmin = 0; 698 changed = 1; 699 } 700 if (it->max > rmax) { 701 it->max = rmax; 702 it->openmax = 0; 703 changed = 1; 704 } 705 if (snd_interval_checkempty(it)) { 706 it->empty = 1; 707 return -EINVAL; 708 } 709 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); 710 return changed; 711 } 712 713 714 static int hw_rule_channels(struct snd_pcm_hw_params *params, 715 struct snd_pcm_hw_rule *rule) 716 { 717 struct snd_usb_substream *subs = rule->private; 718 struct list_head *p; 719 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 720 unsigned int rmin, rmax; 721 int changed; 722 723 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max); 724 changed = 0; 725 rmin = rmax = 0; 726 list_for_each(p, &subs->fmt_list) { 727 struct audioformat *fp; 728 fp = list_entry(p, struct audioformat, list); 729 if (!hw_check_valid_format(subs, params, fp)) 730 continue; 731 if (changed++) { 732 if (rmin > fp->channels) 733 rmin = fp->channels; 734 if (rmax < fp->channels) 735 rmax = fp->channels; 736 } else { 737 rmin = fp->channels; 738 rmax = fp->channels; 739 } 740 } 741 742 if (!changed) { 743 hwc_debug(" --> get empty\n"); 744 it->empty = 1; 745 return -EINVAL; 746 } 747 748 changed = 0; 749 if (it->min < rmin) { 750 it->min = rmin; 751 it->openmin = 0; 752 changed = 1; 753 } 754 if (it->max > rmax) { 755 it->max = rmax; 756 it->openmax = 0; 757 changed = 1; 758 } 759 if (snd_interval_checkempty(it)) { 760 it->empty = 1; 761 return -EINVAL; 762 } 763 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); 764 return changed; 765 } 766 767 static int hw_rule_format(struct snd_pcm_hw_params *params, 768 struct snd_pcm_hw_rule *rule) 769 { 770 struct snd_usb_substream *subs = rule->private; 771 struct list_head *p; 772 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 773 u64 fbits; 774 u32 oldbits[2]; 775 int changed; 776 777 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); 778 fbits = 0; 779 list_for_each(p, &subs->fmt_list) { 780 struct audioformat *fp; 781 fp = list_entry(p, struct audioformat, list); 782 if (!hw_check_valid_format(subs, params, fp)) 783 continue; 784 fbits |= fp->formats; 785 } 786 787 oldbits[0] = fmt->bits[0]; 788 oldbits[1] = fmt->bits[1]; 789 fmt->bits[0] &= (u32)fbits; 790 fmt->bits[1] &= (u32)(fbits >> 32); 791 if (!fmt->bits[0] && !fmt->bits[1]) { 792 hwc_debug(" --> get empty\n"); 793 return -EINVAL; 794 } 795 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); 796 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); 797 return changed; 798 } 799 800 static int hw_rule_period_time(struct snd_pcm_hw_params *params, 801 struct snd_pcm_hw_rule *rule) 802 { 803 struct snd_usb_substream *subs = rule->private; 804 struct audioformat *fp; 805 struct snd_interval *it; 806 unsigned char min_datainterval; 807 unsigned int pmin; 808 int changed; 809 810 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); 811 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max); 812 min_datainterval = 0xff; 813 list_for_each_entry(fp, &subs->fmt_list, list) { 814 if (!hw_check_valid_format(subs, params, fp)) 815 continue; 816 min_datainterval = min(min_datainterval, fp->datainterval); 817 } 818 if (min_datainterval == 0xff) { 819 hwc_debug(" --> get empty\n"); 820 it->empty = 1; 821 return -EINVAL; 822 } 823 pmin = 125 * (1 << min_datainterval); 824 changed = 0; 825 if (it->min < pmin) { 826 it->min = pmin; 827 it->openmin = 0; 828 changed = 1; 829 } 830 if (snd_interval_checkempty(it)) { 831 it->empty = 1; 832 return -EINVAL; 833 } 834 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed); 835 return changed; 836 } 837 838 /* 839 * If the device supports unusual bit rates, does the request meet these? 840 */ 841 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, 842 struct snd_usb_substream *subs) 843 { 844 struct audioformat *fp; 845 int *rate_list; 846 int count = 0, needs_knot = 0; 847 int err; 848 849 kfree(subs->rate_list.list); 850 subs->rate_list.list = NULL; 851 852 list_for_each_entry(fp, &subs->fmt_list, list) { 853 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) 854 return 0; 855 count += fp->nr_rates; 856 if (fp->rates & SNDRV_PCM_RATE_KNOT) 857 needs_knot = 1; 858 } 859 if (!needs_knot) 860 return 0; 861 862 subs->rate_list.list = rate_list = 863 kmalloc(sizeof(int) * count, GFP_KERNEL); 864 if (!subs->rate_list.list) 865 return -ENOMEM; 866 subs->rate_list.count = count; 867 subs->rate_list.mask = 0; 868 count = 0; 869 list_for_each_entry(fp, &subs->fmt_list, list) { 870 int i; 871 for (i = 0; i < fp->nr_rates; i++) 872 rate_list[count++] = fp->rate_table[i]; 873 } 874 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 875 &subs->rate_list); 876 if (err < 0) 877 return err; 878 879 return 0; 880 } 881 882 883 /* 884 * set up the runtime hardware information. 885 */ 886 887 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) 888 { 889 struct list_head *p; 890 unsigned int pt, ptmin; 891 int param_period_time_if_needed; 892 int err; 893 894 runtime->hw.formats = subs->formats; 895 896 runtime->hw.rate_min = 0x7fffffff; 897 runtime->hw.rate_max = 0; 898 runtime->hw.channels_min = 256; 899 runtime->hw.channels_max = 0; 900 runtime->hw.rates = 0; 901 ptmin = UINT_MAX; 902 /* check min/max rates and channels */ 903 list_for_each(p, &subs->fmt_list) { 904 struct audioformat *fp; 905 fp = list_entry(p, struct audioformat, list); 906 runtime->hw.rates |= fp->rates; 907 if (runtime->hw.rate_min > fp->rate_min) 908 runtime->hw.rate_min = fp->rate_min; 909 if (runtime->hw.rate_max < fp->rate_max) 910 runtime->hw.rate_max = fp->rate_max; 911 if (runtime->hw.channels_min > fp->channels) 912 runtime->hw.channels_min = fp->channels; 913 if (runtime->hw.channels_max < fp->channels) 914 runtime->hw.channels_max = fp->channels; 915 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { 916 /* FIXME: there might be more than one audio formats... */ 917 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = 918 fp->frame_size; 919 } 920 pt = 125 * (1 << fp->datainterval); 921 ptmin = min(ptmin, pt); 922 } 923 err = snd_usb_autoresume(subs->stream->chip); 924 if (err < 0) 925 return err; 926 927 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; 928 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) 929 /* full speed devices have fixed data packet interval */ 930 ptmin = 1000; 931 if (ptmin == 1000) 932 /* if period time doesn't go below 1 ms, no rules needed */ 933 param_period_time_if_needed = -1; 934 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 935 ptmin, UINT_MAX); 936 937 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 938 hw_rule_rate, subs, 939 SNDRV_PCM_HW_PARAM_FORMAT, 940 SNDRV_PCM_HW_PARAM_CHANNELS, 941 param_period_time_if_needed, 942 -1)) < 0) 943 goto rep_err; 944 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 945 hw_rule_channels, subs, 946 SNDRV_PCM_HW_PARAM_FORMAT, 947 SNDRV_PCM_HW_PARAM_RATE, 948 param_period_time_if_needed, 949 -1)) < 0) 950 goto rep_err; 951 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 952 hw_rule_format, subs, 953 SNDRV_PCM_HW_PARAM_RATE, 954 SNDRV_PCM_HW_PARAM_CHANNELS, 955 param_period_time_if_needed, 956 -1)) < 0) 957 goto rep_err; 958 if (param_period_time_if_needed >= 0) { 959 err = snd_pcm_hw_rule_add(runtime, 0, 960 SNDRV_PCM_HW_PARAM_PERIOD_TIME, 961 hw_rule_period_time, subs, 962 SNDRV_PCM_HW_PARAM_FORMAT, 963 SNDRV_PCM_HW_PARAM_CHANNELS, 964 SNDRV_PCM_HW_PARAM_RATE, 965 -1); 966 if (err < 0) 967 goto rep_err; 968 } 969 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0) 970 goto rep_err; 971 return 0; 972 973 rep_err: 974 snd_usb_autosuspend(subs->stream->chip); 975 return err; 976 } 977 978 static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction) 979 { 980 struct snd_usb_stream *as = snd_pcm_substream_chip(substream); 981 struct snd_pcm_runtime *runtime = substream->runtime; 982 struct snd_usb_substream *subs = &as->substream[direction]; 983 984 subs->interface = -1; 985 subs->altset_idx = 0; 986 runtime->hw = snd_usb_hardware; 987 runtime->private_data = subs; 988 subs->pcm_substream = substream; 989 /* runtime PM is also done there */ 990 return setup_hw_info(runtime, subs); 991 } 992 993 static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction) 994 { 995 struct snd_usb_stream *as = snd_pcm_substream_chip(substream); 996 struct snd_usb_substream *subs = &as->substream[direction]; 997 998 stop_endpoints(subs, 0, 0, 0); 999 1000 if (!as->chip->shutdown && subs->interface >= 0) { 1001 usb_set_interface(subs->dev, subs->interface, 0); 1002 subs->interface = -1; 1003 } 1004 1005 subs->pcm_substream = NULL; 1006 snd_usb_autosuspend(subs->stream->chip); 1007 1008 return 0; 1009 } 1010 1011 /* Since a URB can handle only a single linear buffer, we must use double 1012 * buffering when the data to be transferred overflows the buffer boundary. 1013 * To avoid inconsistencies when updating hwptr_done, we use double buffering 1014 * for all URBs. 1015 */ 1016 static void retire_capture_urb(struct snd_usb_substream *subs, 1017 struct urb *urb) 1018 { 1019 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 1020 unsigned int stride, frames, bytes, oldptr; 1021 int i, period_elapsed = 0; 1022 unsigned long flags; 1023 unsigned char *cp; 1024 1025 stride = runtime->frame_bits >> 3; 1026 1027 for (i = 0; i < urb->number_of_packets; i++) { 1028 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset; 1029 if (urb->iso_frame_desc[i].status && printk_ratelimit()) { 1030 snd_printdd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status); 1031 // continue; 1032 } 1033 bytes = urb->iso_frame_desc[i].actual_length; 1034 frames = bytes / stride; 1035 if (!subs->txfr_quirk) 1036 bytes = frames * stride; 1037 if (bytes % (runtime->sample_bits >> 3) != 0) { 1038 #ifdef CONFIG_SND_DEBUG_VERBOSE 1039 int oldbytes = bytes; 1040 #endif 1041 bytes = frames * stride; 1042 snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n", 1043 oldbytes, bytes); 1044 } 1045 /* update the current pointer */ 1046 spin_lock_irqsave(&subs->lock, flags); 1047 oldptr = subs->hwptr_done; 1048 subs->hwptr_done += bytes; 1049 if (subs->hwptr_done >= runtime->buffer_size * stride) 1050 subs->hwptr_done -= runtime->buffer_size * stride; 1051 frames = (bytes + (oldptr % stride)) / stride; 1052 subs->transfer_done += frames; 1053 if (subs->transfer_done >= runtime->period_size) { 1054 subs->transfer_done -= runtime->period_size; 1055 period_elapsed = 1; 1056 } 1057 spin_unlock_irqrestore(&subs->lock, flags); 1058 /* copy a data chunk */ 1059 if (oldptr + bytes > runtime->buffer_size * stride) { 1060 unsigned int bytes1 = 1061 runtime->buffer_size * stride - oldptr; 1062 memcpy(runtime->dma_area + oldptr, cp, bytes1); 1063 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); 1064 } else { 1065 memcpy(runtime->dma_area + oldptr, cp, bytes); 1066 } 1067 } 1068 1069 if (period_elapsed) 1070 snd_pcm_period_elapsed(subs->pcm_substream); 1071 } 1072 1073 static void prepare_playback_urb(struct snd_usb_substream *subs, 1074 struct urb *urb) 1075 { 1076 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 1077 struct snd_usb_endpoint *ep = subs->data_endpoint; 1078 struct snd_urb_ctx *ctx = urb->context; 1079 unsigned int counts, frames, bytes; 1080 int i, stride, period_elapsed = 0; 1081 unsigned long flags; 1082 1083 stride = runtime->frame_bits >> 3; 1084 1085 frames = 0; 1086 urb->number_of_packets = 0; 1087 spin_lock_irqsave(&subs->lock, flags); 1088 for (i = 0; i < ctx->packets; i++) { 1089 if (ctx->packet_size[i]) 1090 counts = ctx->packet_size[i]; 1091 else 1092 counts = snd_usb_endpoint_next_packet_size(ep); 1093 1094 /* set up descriptor */ 1095 urb->iso_frame_desc[i].offset = frames * stride; 1096 urb->iso_frame_desc[i].length = counts * stride; 1097 frames += counts; 1098 urb->number_of_packets++; 1099 subs->transfer_done += counts; 1100 if (subs->transfer_done >= runtime->period_size) { 1101 subs->transfer_done -= runtime->period_size; 1102 period_elapsed = 1; 1103 if (subs->fmt_type == UAC_FORMAT_TYPE_II) { 1104 if (subs->transfer_done > 0) { 1105 /* FIXME: fill-max mode is not 1106 * supported yet */ 1107 frames -= subs->transfer_done; 1108 counts -= subs->transfer_done; 1109 urb->iso_frame_desc[i].length = 1110 counts * stride; 1111 subs->transfer_done = 0; 1112 } 1113 i++; 1114 if (i < ctx->packets) { 1115 /* add a transfer delimiter */ 1116 urb->iso_frame_desc[i].offset = 1117 frames * stride; 1118 urb->iso_frame_desc[i].length = 0; 1119 urb->number_of_packets++; 1120 } 1121 break; 1122 } 1123 } 1124 if (period_elapsed && 1125 !snd_usb_endpoint_implict_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */ 1126 break; 1127 } 1128 bytes = frames * stride; 1129 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) { 1130 /* err, the transferred area goes over buffer boundary. */ 1131 unsigned int bytes1 = 1132 runtime->buffer_size * stride - subs->hwptr_done; 1133 memcpy(urb->transfer_buffer, 1134 runtime->dma_area + subs->hwptr_done, bytes1); 1135 memcpy(urb->transfer_buffer + bytes1, 1136 runtime->dma_area, bytes - bytes1); 1137 } else { 1138 memcpy(urb->transfer_buffer, 1139 runtime->dma_area + subs->hwptr_done, bytes); 1140 } 1141 subs->hwptr_done += bytes; 1142 if (subs->hwptr_done >= runtime->buffer_size * stride) 1143 subs->hwptr_done -= runtime->buffer_size * stride; 1144 1145 /* update delay with exact number of samples queued */ 1146 runtime->delay = subs->last_delay; 1147 runtime->delay += frames; 1148 subs->last_delay = runtime->delay; 1149 1150 /* realign last_frame_number */ 1151 subs->last_frame_number = usb_get_current_frame_number(subs->dev); 1152 subs->last_frame_number &= 0xFF; /* keep 8 LSBs */ 1153 1154 spin_unlock_irqrestore(&subs->lock, flags); 1155 urb->transfer_buffer_length = bytes; 1156 if (period_elapsed) 1157 snd_pcm_period_elapsed(subs->pcm_substream); 1158 } 1159 1160 /* 1161 * process after playback data complete 1162 * - decrease the delay count again 1163 */ 1164 static void retire_playback_urb(struct snd_usb_substream *subs, 1165 struct urb *urb) 1166 { 1167 unsigned long flags; 1168 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 1169 int stride = runtime->frame_bits >> 3; 1170 int processed = urb->transfer_buffer_length / stride; 1171 int est_delay; 1172 1173 /* ignore the delay accounting when procssed=0 is given, i.e. 1174 * silent payloads are procssed before handling the actual data 1175 */ 1176 if (!processed) 1177 return; 1178 1179 spin_lock_irqsave(&subs->lock, flags); 1180 est_delay = snd_usb_pcm_delay(subs, runtime->rate); 1181 /* update delay with exact number of samples played */ 1182 if (processed > subs->last_delay) 1183 subs->last_delay = 0; 1184 else 1185 subs->last_delay -= processed; 1186 runtime->delay = subs->last_delay; 1187 1188 /* 1189 * Report when delay estimate is off by more than 2ms. 1190 * The error should be lower than 2ms since the estimate relies 1191 * on two reads of a counter updated every ms. 1192 */ 1193 if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2) 1194 snd_printk(KERN_DEBUG "delay: estimated %d, actual %d\n", 1195 est_delay, subs->last_delay); 1196 1197 spin_unlock_irqrestore(&subs->lock, flags); 1198 } 1199 1200 static int snd_usb_playback_open(struct snd_pcm_substream *substream) 1201 { 1202 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK); 1203 } 1204 1205 static int snd_usb_playback_close(struct snd_pcm_substream *substream) 1206 { 1207 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK); 1208 } 1209 1210 static int snd_usb_capture_open(struct snd_pcm_substream *substream) 1211 { 1212 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE); 1213 } 1214 1215 static int snd_usb_capture_close(struct snd_pcm_substream *substream) 1216 { 1217 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE); 1218 } 1219 1220 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, 1221 int cmd) 1222 { 1223 struct snd_usb_substream *subs = substream->runtime->private_data; 1224 1225 switch (cmd) { 1226 case SNDRV_PCM_TRIGGER_START: 1227 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1228 subs->data_endpoint->prepare_data_urb = prepare_playback_urb; 1229 subs->data_endpoint->retire_data_urb = retire_playback_urb; 1230 subs->running = 1; 1231 return 0; 1232 case SNDRV_PCM_TRIGGER_STOP: 1233 stop_endpoints(subs, 0, 0, 0); 1234 subs->running = 0; 1235 return 0; 1236 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1237 subs->data_endpoint->prepare_data_urb = NULL; 1238 subs->data_endpoint->retire_data_urb = NULL; 1239 subs->running = 0; 1240 return 0; 1241 } 1242 1243 return -EINVAL; 1244 } 1245 1246 static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, 1247 int cmd) 1248 { 1249 int err; 1250 struct snd_usb_substream *subs = substream->runtime->private_data; 1251 1252 switch (cmd) { 1253 case SNDRV_PCM_TRIGGER_START: 1254 err = start_endpoints(subs, 0); 1255 if (err < 0) 1256 return err; 1257 1258 subs->data_endpoint->retire_data_urb = retire_capture_urb; 1259 subs->running = 1; 1260 return 0; 1261 case SNDRV_PCM_TRIGGER_STOP: 1262 stop_endpoints(subs, 0, 0, 0); 1263 subs->running = 0; 1264 return 0; 1265 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1266 subs->data_endpoint->retire_data_urb = NULL; 1267 subs->running = 0; 1268 return 0; 1269 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1270 subs->data_endpoint->retire_data_urb = retire_capture_urb; 1271 subs->running = 1; 1272 return 0; 1273 } 1274 1275 return -EINVAL; 1276 } 1277 1278 static struct snd_pcm_ops snd_usb_playback_ops = { 1279 .open = snd_usb_playback_open, 1280 .close = snd_usb_playback_close, 1281 .ioctl = snd_pcm_lib_ioctl, 1282 .hw_params = snd_usb_hw_params, 1283 .hw_free = snd_usb_hw_free, 1284 .prepare = snd_usb_pcm_prepare, 1285 .trigger = snd_usb_substream_playback_trigger, 1286 .pointer = snd_usb_pcm_pointer, 1287 .page = snd_pcm_lib_get_vmalloc_page, 1288 .mmap = snd_pcm_lib_mmap_vmalloc, 1289 }; 1290 1291 static struct snd_pcm_ops snd_usb_capture_ops = { 1292 .open = snd_usb_capture_open, 1293 .close = snd_usb_capture_close, 1294 .ioctl = snd_pcm_lib_ioctl, 1295 .hw_params = snd_usb_hw_params, 1296 .hw_free = snd_usb_hw_free, 1297 .prepare = snd_usb_pcm_prepare, 1298 .trigger = snd_usb_substream_capture_trigger, 1299 .pointer = snd_usb_pcm_pointer, 1300 .page = snd_pcm_lib_get_vmalloc_page, 1301 .mmap = snd_pcm_lib_mmap_vmalloc, 1302 }; 1303 1304 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) 1305 { 1306 snd_pcm_set_ops(pcm, stream, 1307 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1308 &snd_usb_playback_ops : &snd_usb_capture_ops); 1309 } 1310