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, unsigned int format, 86 unsigned int rate, unsigned int channels) 87 { 88 struct list_head *p; 89 struct audioformat *found = NULL; 90 int cur_attr = 0, attr; 91 92 list_for_each(p, &subs->fmt_list) { 93 struct audioformat *fp; 94 fp = list_entry(p, struct audioformat, list); 95 if (!(fp->formats & (1uLL << format))) 96 continue; 97 if (fp->channels != channels) 98 continue; 99 if (rate < fp->rate_min || 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] == 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) 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); 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 snd_printdd(KERN_DEBUG "Starting sync EP @%p\n", ep); 240 241 ep->sync_slave = subs->data_endpoint; 242 err = snd_usb_endpoint_start(ep); 243 if (err < 0) { 244 clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); 245 return err; 246 } 247 } 248 249 return 0; 250 } 251 252 static void stop_endpoints(struct snd_usb_substream *subs, 253 int force, int can_sleep, int wait) 254 { 255 if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) 256 snd_usb_endpoint_stop(subs->sync_endpoint, 257 force, can_sleep, wait); 258 259 if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) 260 snd_usb_endpoint_stop(subs->data_endpoint, 261 force, can_sleep, wait); 262 } 263 264 static int activate_endpoints(struct snd_usb_substream *subs) 265 { 266 if (subs->sync_endpoint) { 267 int ret; 268 269 ret = snd_usb_endpoint_activate(subs->sync_endpoint); 270 if (ret < 0) 271 return ret; 272 } 273 274 return snd_usb_endpoint_activate(subs->data_endpoint); 275 } 276 277 static int deactivate_endpoints(struct snd_usb_substream *subs) 278 { 279 int reta, retb; 280 281 reta = snd_usb_endpoint_deactivate(subs->sync_endpoint); 282 retb = snd_usb_endpoint_deactivate(subs->data_endpoint); 283 284 if (reta < 0) 285 return reta; 286 287 if (retb < 0) 288 return retb; 289 290 return 0; 291 } 292 293 /* 294 * find a matching format and set up the interface 295 */ 296 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt) 297 { 298 struct usb_device *dev = subs->dev; 299 struct usb_host_interface *alts; 300 struct usb_interface_descriptor *altsd; 301 struct usb_interface *iface; 302 unsigned int ep, attr; 303 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; 304 int err, implicit_fb = 0; 305 306 iface = usb_ifnum_to_if(dev, fmt->iface); 307 if (WARN_ON(!iface)) 308 return -EINVAL; 309 alts = &iface->altsetting[fmt->altset_idx]; 310 altsd = get_iface_desc(alts); 311 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting)) 312 return -EINVAL; 313 314 if (fmt == subs->cur_audiofmt) 315 return 0; 316 317 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip, 318 alts, fmt->endpoint, subs->direction, 319 SND_USB_ENDPOINT_TYPE_DATA); 320 if (!subs->data_endpoint) 321 return -EINVAL; 322 323 /* we need a sync pipe in async OUT or adaptive IN mode */ 324 /* check the number of EP, since some devices have broken 325 * descriptors which fool us. if it has only one EP, 326 * assume it as adaptive-out or sync-in. 327 */ 328 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; 329 330 switch (subs->stream->chip->usb_id) { 331 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */ 332 case USB_ID(0x0763, 0x2081): 333 if (is_playback) { 334 implicit_fb = 1; 335 ep = 0x81; 336 iface = usb_ifnum_to_if(dev, 2); 337 338 if (!iface || iface->num_altsetting == 0) 339 return -EINVAL; 340 341 alts = &iface->altsetting[1]; 342 goto add_sync_ep; 343 } 344 } 345 346 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) || 347 (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) && 348 altsd->bNumEndpoints >= 2) { 349 /* check sync-pipe endpoint */ 350 /* ... and check descriptor size before accessing bSynchAddress 351 because there is a version of the SB Audigy 2 NX firmware lacking 352 the audio fields in the endpoint descriptors */ 353 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 || 354 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && 355 get_endpoint(alts, 1)->bSynchAddress != 0 && 356 !implicit_fb)) { 357 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n", 358 dev->devnum, fmt->iface, fmt->altsetting, 359 get_endpoint(alts, 1)->bmAttributes, 360 get_endpoint(alts, 1)->bLength, 361 get_endpoint(alts, 1)->bSynchAddress); 362 return -EINVAL; 363 } 364 ep = get_endpoint(alts, 1)->bEndpointAddress; 365 if (!implicit_fb && 366 get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && 367 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || 368 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { 369 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n", 370 dev->devnum, fmt->iface, fmt->altsetting, 371 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress); 372 return -EINVAL; 373 } 374 375 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK) 376 == USB_ENDPOINT_USAGE_IMPLICIT_FB; 377 378 add_sync_ep: 379 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip, 380 alts, ep, !subs->direction, 381 implicit_fb ? 382 SND_USB_ENDPOINT_TYPE_DATA : 383 SND_USB_ENDPOINT_TYPE_SYNC); 384 if (!subs->sync_endpoint) 385 return -EINVAL; 386 387 subs->data_endpoint->sync_master = subs->sync_endpoint; 388 } 389 390 if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0) 391 return err; 392 393 subs->cur_audiofmt = fmt; 394 395 snd_usb_set_format_quirk(subs, fmt); 396 397 #if 0 398 printk(KERN_DEBUG 399 "setting done: format = %d, rate = %d..%d, channels = %d\n", 400 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels); 401 printk(KERN_DEBUG 402 " datapipe = 0x%0x, syncpipe = 0x%0x\n", 403 subs->datapipe, subs->syncpipe); 404 #endif 405 406 return 0; 407 } 408 409 /* 410 * hw_params callback 411 * 412 * allocate a buffer and set the given audio format. 413 * 414 * so far we use a physically linear buffer although packetize transfer 415 * doesn't need a continuous area. 416 * if sg buffer is supported on the later version of alsa, we'll follow 417 * that. 418 */ 419 static int snd_usb_hw_params(struct snd_pcm_substream *substream, 420 struct snd_pcm_hw_params *hw_params) 421 { 422 struct snd_usb_substream *subs = substream->runtime->private_data; 423 struct audioformat *fmt; 424 unsigned int channels, rate, format; 425 int ret, changed; 426 427 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream, 428 params_buffer_bytes(hw_params)); 429 if (ret < 0) 430 return ret; 431 432 format = params_format(hw_params); 433 rate = params_rate(hw_params); 434 channels = params_channels(hw_params); 435 fmt = find_format(subs, format, rate, channels); 436 if (!fmt) { 437 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n", 438 format, rate, channels); 439 return -EINVAL; 440 } 441 442 changed = subs->cur_audiofmt != fmt || 443 subs->period_bytes != params_period_bytes(hw_params) || 444 subs->cur_rate != rate; 445 if ((ret = set_format(subs, fmt)) < 0) 446 return ret; 447 448 if (subs->cur_rate != rate) { 449 struct usb_host_interface *alts; 450 struct usb_interface *iface; 451 iface = usb_ifnum_to_if(subs->dev, fmt->iface); 452 alts = &iface->altsetting[fmt->altset_idx]; 453 ret = snd_usb_init_sample_rate(subs->stream->chip, subs->interface, alts, fmt, rate); 454 if (ret < 0) 455 return ret; 456 subs->cur_rate = rate; 457 } 458 459 if (changed) { 460 mutex_lock(&subs->stream->chip->shutdown_mutex); 461 /* format changed */ 462 stop_endpoints(subs, 0, 0, 0); 463 deactivate_endpoints(subs); 464 465 ret = activate_endpoints(subs); 466 if (ret < 0) 467 goto unlock; 468 469 ret = snd_usb_endpoint_set_params(subs->data_endpoint, hw_params, fmt, 470 subs->sync_endpoint); 471 if (ret < 0) 472 goto unlock; 473 474 if (subs->sync_endpoint) 475 ret = snd_usb_endpoint_set_params(subs->sync_endpoint, 476 hw_params, fmt, NULL); 477 unlock: 478 mutex_unlock(&subs->stream->chip->shutdown_mutex); 479 } 480 481 if (ret == 0) { 482 subs->interface = fmt->iface; 483 subs->altset_idx = fmt->altset_idx; 484 } 485 486 return ret; 487 } 488 489 /* 490 * hw_free callback 491 * 492 * reset the audio format and release the buffer 493 */ 494 static int snd_usb_hw_free(struct snd_pcm_substream *substream) 495 { 496 struct snd_usb_substream *subs = substream->runtime->private_data; 497 498 subs->cur_audiofmt = NULL; 499 subs->cur_rate = 0; 500 subs->period_bytes = 0; 501 mutex_lock(&subs->stream->chip->shutdown_mutex); 502 stop_endpoints(subs, 0, 1, 1); 503 mutex_unlock(&subs->stream->chip->shutdown_mutex); 504 return snd_pcm_lib_free_vmalloc_buffer(substream); 505 } 506 507 /* 508 * prepare callback 509 * 510 * only a few subtle things... 511 */ 512 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) 513 { 514 struct snd_pcm_runtime *runtime = substream->runtime; 515 struct snd_usb_substream *subs = runtime->private_data; 516 517 if (! subs->cur_audiofmt) { 518 snd_printk(KERN_ERR "usbaudio: no format is specified!\n"); 519 return -ENXIO; 520 } 521 522 if (snd_BUG_ON(!subs->data_endpoint)) 523 return -EIO; 524 525 /* some unit conversions in runtime */ 526 subs->data_endpoint->maxframesize = 527 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize); 528 subs->data_endpoint->curframesize = 529 bytes_to_frames(runtime, subs->data_endpoint->curpacksize); 530 531 /* reset the pointer */ 532 subs->hwptr_done = 0; 533 subs->transfer_done = 0; 534 subs->last_delay = 0; 535 subs->last_frame_number = 0; 536 runtime->delay = 0; 537 538 /* for playback, submit the URBs now; otherwise, the first hwptr_done 539 * updates for all URBs would happen at the same time when starting */ 540 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) 541 return start_endpoints(subs); 542 543 return 0; 544 } 545 546 static struct snd_pcm_hardware snd_usb_hardware = 547 { 548 .info = SNDRV_PCM_INFO_MMAP | 549 SNDRV_PCM_INFO_MMAP_VALID | 550 SNDRV_PCM_INFO_BATCH | 551 SNDRV_PCM_INFO_INTERLEAVED | 552 SNDRV_PCM_INFO_BLOCK_TRANSFER | 553 SNDRV_PCM_INFO_PAUSE, 554 .buffer_bytes_max = 1024 * 1024, 555 .period_bytes_min = 64, 556 .period_bytes_max = 512 * 1024, 557 .periods_min = 2, 558 .periods_max = 1024, 559 }; 560 561 static int hw_check_valid_format(struct snd_usb_substream *subs, 562 struct snd_pcm_hw_params *params, 563 struct audioformat *fp) 564 { 565 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 566 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 567 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 568 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); 569 struct snd_mask check_fmts; 570 unsigned int ptime; 571 572 /* check the format */ 573 snd_mask_none(&check_fmts); 574 check_fmts.bits[0] = (u32)fp->formats; 575 check_fmts.bits[1] = (u32)(fp->formats >> 32); 576 snd_mask_intersect(&check_fmts, fmts); 577 if (snd_mask_empty(&check_fmts)) { 578 hwc_debug(" > check: no supported format %d\n", fp->format); 579 return 0; 580 } 581 /* check the channels */ 582 if (fp->channels < ct->min || fp->channels > ct->max) { 583 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); 584 return 0; 585 } 586 /* check the rate is within the range */ 587 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { 588 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); 589 return 0; 590 } 591 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { 592 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); 593 return 0; 594 } 595 /* check whether the period time is >= the data packet interval */ 596 if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) { 597 ptime = 125 * (1 << fp->datainterval); 598 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { 599 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max); 600 return 0; 601 } 602 } 603 return 1; 604 } 605 606 static int hw_rule_rate(struct snd_pcm_hw_params *params, 607 struct snd_pcm_hw_rule *rule) 608 { 609 struct snd_usb_substream *subs = rule->private; 610 struct list_head *p; 611 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 612 unsigned int rmin, rmax; 613 int changed; 614 615 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); 616 changed = 0; 617 rmin = rmax = 0; 618 list_for_each(p, &subs->fmt_list) { 619 struct audioformat *fp; 620 fp = list_entry(p, struct audioformat, list); 621 if (!hw_check_valid_format(subs, params, fp)) 622 continue; 623 if (changed++) { 624 if (rmin > fp->rate_min) 625 rmin = fp->rate_min; 626 if (rmax < fp->rate_max) 627 rmax = fp->rate_max; 628 } else { 629 rmin = fp->rate_min; 630 rmax = fp->rate_max; 631 } 632 } 633 634 if (!changed) { 635 hwc_debug(" --> get empty\n"); 636 it->empty = 1; 637 return -EINVAL; 638 } 639 640 changed = 0; 641 if (it->min < rmin) { 642 it->min = rmin; 643 it->openmin = 0; 644 changed = 1; 645 } 646 if (it->max > rmax) { 647 it->max = rmax; 648 it->openmax = 0; 649 changed = 1; 650 } 651 if (snd_interval_checkempty(it)) { 652 it->empty = 1; 653 return -EINVAL; 654 } 655 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); 656 return changed; 657 } 658 659 660 static int hw_rule_channels(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_CHANNELS); 666 unsigned int rmin, rmax; 667 int changed; 668 669 hwc_debug("hw_rule_channels: (%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->channels) 679 rmin = fp->channels; 680 if (rmax < fp->channels) 681 rmax = fp->channels; 682 } else { 683 rmin = fp->channels; 684 rmax = fp->channels; 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 static int hw_rule_format(struct snd_pcm_hw_params *params, 714 struct snd_pcm_hw_rule *rule) 715 { 716 struct snd_usb_substream *subs = rule->private; 717 struct list_head *p; 718 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 719 u64 fbits; 720 u32 oldbits[2]; 721 int changed; 722 723 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); 724 fbits = 0; 725 list_for_each(p, &subs->fmt_list) { 726 struct audioformat *fp; 727 fp = list_entry(p, struct audioformat, list); 728 if (!hw_check_valid_format(subs, params, fp)) 729 continue; 730 fbits |= fp->formats; 731 } 732 733 oldbits[0] = fmt->bits[0]; 734 oldbits[1] = fmt->bits[1]; 735 fmt->bits[0] &= (u32)fbits; 736 fmt->bits[1] &= (u32)(fbits >> 32); 737 if (!fmt->bits[0] && !fmt->bits[1]) { 738 hwc_debug(" --> get empty\n"); 739 return -EINVAL; 740 } 741 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); 742 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); 743 return changed; 744 } 745 746 static int hw_rule_period_time(struct snd_pcm_hw_params *params, 747 struct snd_pcm_hw_rule *rule) 748 { 749 struct snd_usb_substream *subs = rule->private; 750 struct audioformat *fp; 751 struct snd_interval *it; 752 unsigned char min_datainterval; 753 unsigned int pmin; 754 int changed; 755 756 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); 757 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max); 758 min_datainterval = 0xff; 759 list_for_each_entry(fp, &subs->fmt_list, list) { 760 if (!hw_check_valid_format(subs, params, fp)) 761 continue; 762 min_datainterval = min(min_datainterval, fp->datainterval); 763 } 764 if (min_datainterval == 0xff) { 765 hwc_debug(" --> get empty\n"); 766 it->empty = 1; 767 return -EINVAL; 768 } 769 pmin = 125 * (1 << min_datainterval); 770 changed = 0; 771 if (it->min < pmin) { 772 it->min = pmin; 773 it->openmin = 0; 774 changed = 1; 775 } 776 if (snd_interval_checkempty(it)) { 777 it->empty = 1; 778 return -EINVAL; 779 } 780 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed); 781 return changed; 782 } 783 784 /* 785 * If the device supports unusual bit rates, does the request meet these? 786 */ 787 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, 788 struct snd_usb_substream *subs) 789 { 790 struct audioformat *fp; 791 int *rate_list; 792 int count = 0, needs_knot = 0; 793 int err; 794 795 kfree(subs->rate_list.list); 796 subs->rate_list.list = NULL; 797 798 list_for_each_entry(fp, &subs->fmt_list, list) { 799 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) 800 return 0; 801 count += fp->nr_rates; 802 if (fp->rates & SNDRV_PCM_RATE_KNOT) 803 needs_knot = 1; 804 } 805 if (!needs_knot) 806 return 0; 807 808 subs->rate_list.list = rate_list = 809 kmalloc(sizeof(int) * count, GFP_KERNEL); 810 if (!subs->rate_list.list) 811 return -ENOMEM; 812 subs->rate_list.count = count; 813 subs->rate_list.mask = 0; 814 count = 0; 815 list_for_each_entry(fp, &subs->fmt_list, list) { 816 int i; 817 for (i = 0; i < fp->nr_rates; i++) 818 rate_list[count++] = fp->rate_table[i]; 819 } 820 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 821 &subs->rate_list); 822 if (err < 0) 823 return err; 824 825 return 0; 826 } 827 828 829 /* 830 * set up the runtime hardware information. 831 */ 832 833 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) 834 { 835 struct list_head *p; 836 unsigned int pt, ptmin; 837 int param_period_time_if_needed; 838 int err; 839 840 runtime->hw.formats = subs->formats; 841 842 runtime->hw.rate_min = 0x7fffffff; 843 runtime->hw.rate_max = 0; 844 runtime->hw.channels_min = 256; 845 runtime->hw.channels_max = 0; 846 runtime->hw.rates = 0; 847 ptmin = UINT_MAX; 848 /* check min/max rates and channels */ 849 list_for_each(p, &subs->fmt_list) { 850 struct audioformat *fp; 851 fp = list_entry(p, struct audioformat, list); 852 runtime->hw.rates |= fp->rates; 853 if (runtime->hw.rate_min > fp->rate_min) 854 runtime->hw.rate_min = fp->rate_min; 855 if (runtime->hw.rate_max < fp->rate_max) 856 runtime->hw.rate_max = fp->rate_max; 857 if (runtime->hw.channels_min > fp->channels) 858 runtime->hw.channels_min = fp->channels; 859 if (runtime->hw.channels_max < fp->channels) 860 runtime->hw.channels_max = fp->channels; 861 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { 862 /* FIXME: there might be more than one audio formats... */ 863 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = 864 fp->frame_size; 865 } 866 pt = 125 * (1 << fp->datainterval); 867 ptmin = min(ptmin, pt); 868 } 869 err = snd_usb_autoresume(subs->stream->chip); 870 if (err < 0) 871 return err; 872 873 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; 874 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) 875 /* full speed devices have fixed data packet interval */ 876 ptmin = 1000; 877 if (ptmin == 1000) 878 /* if period time doesn't go below 1 ms, no rules needed */ 879 param_period_time_if_needed = -1; 880 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 881 ptmin, UINT_MAX); 882 883 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 884 hw_rule_rate, subs, 885 SNDRV_PCM_HW_PARAM_FORMAT, 886 SNDRV_PCM_HW_PARAM_CHANNELS, 887 param_period_time_if_needed, 888 -1)) < 0) 889 goto rep_err; 890 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 891 hw_rule_channels, subs, 892 SNDRV_PCM_HW_PARAM_FORMAT, 893 SNDRV_PCM_HW_PARAM_RATE, 894 param_period_time_if_needed, 895 -1)) < 0) 896 goto rep_err; 897 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 898 hw_rule_format, subs, 899 SNDRV_PCM_HW_PARAM_RATE, 900 SNDRV_PCM_HW_PARAM_CHANNELS, 901 param_period_time_if_needed, 902 -1)) < 0) 903 goto rep_err; 904 if (param_period_time_if_needed >= 0) { 905 err = snd_pcm_hw_rule_add(runtime, 0, 906 SNDRV_PCM_HW_PARAM_PERIOD_TIME, 907 hw_rule_period_time, subs, 908 SNDRV_PCM_HW_PARAM_FORMAT, 909 SNDRV_PCM_HW_PARAM_CHANNELS, 910 SNDRV_PCM_HW_PARAM_RATE, 911 -1); 912 if (err < 0) 913 goto rep_err; 914 } 915 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0) 916 goto rep_err; 917 return 0; 918 919 rep_err: 920 snd_usb_autosuspend(subs->stream->chip); 921 return err; 922 } 923 924 static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction) 925 { 926 struct snd_usb_stream *as = snd_pcm_substream_chip(substream); 927 struct snd_pcm_runtime *runtime = substream->runtime; 928 struct snd_usb_substream *subs = &as->substream[direction]; 929 930 subs->interface = -1; 931 subs->altset_idx = 0; 932 runtime->hw = snd_usb_hardware; 933 runtime->private_data = subs; 934 subs->pcm_substream = substream; 935 /* runtime PM is also done there */ 936 return setup_hw_info(runtime, subs); 937 } 938 939 static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction) 940 { 941 int ret; 942 struct snd_usb_stream *as = snd_pcm_substream_chip(substream); 943 struct snd_usb_substream *subs = &as->substream[direction]; 944 945 stop_endpoints(subs, 0, 0, 0); 946 ret = deactivate_endpoints(subs); 947 subs->pcm_substream = NULL; 948 snd_usb_autosuspend(subs->stream->chip); 949 950 return ret; 951 } 952 953 /* Since a URB can handle only a single linear buffer, we must use double 954 * buffering when the data to be transferred overflows the buffer boundary. 955 * To avoid inconsistencies when updating hwptr_done, we use double buffering 956 * for all URBs. 957 */ 958 static void retire_capture_urb(struct snd_usb_substream *subs, 959 struct urb *urb) 960 { 961 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 962 unsigned int stride, frames, bytes, oldptr; 963 int i, period_elapsed = 0; 964 unsigned long flags; 965 unsigned char *cp; 966 967 stride = runtime->frame_bits >> 3; 968 969 for (i = 0; i < urb->number_of_packets; i++) { 970 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset; 971 if (urb->iso_frame_desc[i].status && printk_ratelimit()) { 972 snd_printdd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status); 973 // continue; 974 } 975 bytes = urb->iso_frame_desc[i].actual_length; 976 frames = bytes / stride; 977 if (!subs->txfr_quirk) 978 bytes = frames * stride; 979 if (bytes % (runtime->sample_bits >> 3) != 0) { 980 #ifdef CONFIG_SND_DEBUG_VERBOSE 981 int oldbytes = bytes; 982 #endif 983 bytes = frames * stride; 984 snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n", 985 oldbytes, bytes); 986 } 987 /* update the current pointer */ 988 spin_lock_irqsave(&subs->lock, flags); 989 oldptr = subs->hwptr_done; 990 subs->hwptr_done += bytes; 991 if (subs->hwptr_done >= runtime->buffer_size * stride) 992 subs->hwptr_done -= runtime->buffer_size * stride; 993 frames = (bytes + (oldptr % stride)) / stride; 994 subs->transfer_done += frames; 995 if (subs->transfer_done >= runtime->period_size) { 996 subs->transfer_done -= runtime->period_size; 997 period_elapsed = 1; 998 } 999 spin_unlock_irqrestore(&subs->lock, flags); 1000 /* copy a data chunk */ 1001 if (oldptr + bytes > runtime->buffer_size * stride) { 1002 unsigned int bytes1 = 1003 runtime->buffer_size * stride - oldptr; 1004 memcpy(runtime->dma_area + oldptr, cp, bytes1); 1005 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); 1006 } else { 1007 memcpy(runtime->dma_area + oldptr, cp, bytes); 1008 } 1009 } 1010 1011 if (period_elapsed) 1012 snd_pcm_period_elapsed(subs->pcm_substream); 1013 } 1014 1015 static void prepare_playback_urb(struct snd_usb_substream *subs, 1016 struct urb *urb) 1017 { 1018 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 1019 struct snd_urb_ctx *ctx = urb->context; 1020 unsigned int counts, frames, bytes; 1021 int i, stride, period_elapsed = 0; 1022 unsigned long flags; 1023 1024 stride = runtime->frame_bits >> 3; 1025 1026 frames = 0; 1027 urb->number_of_packets = 0; 1028 spin_lock_irqsave(&subs->lock, flags); 1029 for (i = 0; i < ctx->packets; i++) { 1030 counts = ctx->packet_size[i]; 1031 /* set up descriptor */ 1032 urb->iso_frame_desc[i].offset = frames * stride; 1033 urb->iso_frame_desc[i].length = counts * stride; 1034 frames += counts; 1035 urb->number_of_packets++; 1036 subs->transfer_done += counts; 1037 if (subs->transfer_done >= runtime->period_size) { 1038 subs->transfer_done -= runtime->period_size; 1039 period_elapsed = 1; 1040 if (subs->fmt_type == UAC_FORMAT_TYPE_II) { 1041 if (subs->transfer_done > 0) { 1042 /* FIXME: fill-max mode is not 1043 * supported yet */ 1044 frames -= subs->transfer_done; 1045 counts -= subs->transfer_done; 1046 urb->iso_frame_desc[i].length = 1047 counts * stride; 1048 subs->transfer_done = 0; 1049 } 1050 i++; 1051 if (i < ctx->packets) { 1052 /* add a transfer delimiter */ 1053 urb->iso_frame_desc[i].offset = 1054 frames * stride; 1055 urb->iso_frame_desc[i].length = 0; 1056 urb->number_of_packets++; 1057 } 1058 break; 1059 } 1060 } 1061 if (period_elapsed && 1062 !snd_usb_endpoint_implict_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */ 1063 break; 1064 } 1065 bytes = frames * stride; 1066 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) { 1067 /* err, the transferred area goes over buffer boundary. */ 1068 unsigned int bytes1 = 1069 runtime->buffer_size * stride - subs->hwptr_done; 1070 memcpy(urb->transfer_buffer, 1071 runtime->dma_area + subs->hwptr_done, bytes1); 1072 memcpy(urb->transfer_buffer + bytes1, 1073 runtime->dma_area, bytes - bytes1); 1074 } else { 1075 memcpy(urb->transfer_buffer, 1076 runtime->dma_area + subs->hwptr_done, bytes); 1077 } 1078 subs->hwptr_done += bytes; 1079 if (subs->hwptr_done >= runtime->buffer_size * stride) 1080 subs->hwptr_done -= runtime->buffer_size * stride; 1081 runtime->delay += frames; 1082 spin_unlock_irqrestore(&subs->lock, flags); 1083 urb->transfer_buffer_length = bytes; 1084 if (period_elapsed) 1085 snd_pcm_period_elapsed(subs->pcm_substream); 1086 } 1087 1088 /* 1089 * process after playback data complete 1090 * - decrease the delay count again 1091 */ 1092 static void retire_playback_urb(struct snd_usb_substream *subs, 1093 struct urb *urb) 1094 { 1095 unsigned long flags; 1096 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 1097 int stride = runtime->frame_bits >> 3; 1098 int processed = urb->transfer_buffer_length / stride; 1099 1100 spin_lock_irqsave(&subs->lock, flags); 1101 if (processed > runtime->delay) 1102 runtime->delay = 0; 1103 else 1104 runtime->delay -= processed; 1105 spin_unlock_irqrestore(&subs->lock, flags); 1106 } 1107 1108 static int snd_usb_playback_open(struct snd_pcm_substream *substream) 1109 { 1110 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK); 1111 } 1112 1113 static int snd_usb_playback_close(struct snd_pcm_substream *substream) 1114 { 1115 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK); 1116 } 1117 1118 static int snd_usb_capture_open(struct snd_pcm_substream *substream) 1119 { 1120 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE); 1121 } 1122 1123 static int snd_usb_capture_close(struct snd_pcm_substream *substream) 1124 { 1125 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE); 1126 } 1127 1128 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, 1129 int cmd) 1130 { 1131 struct snd_usb_substream *subs = substream->runtime->private_data; 1132 1133 switch (cmd) { 1134 case SNDRV_PCM_TRIGGER_START: 1135 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1136 subs->data_endpoint->prepare_data_urb = prepare_playback_urb; 1137 subs->data_endpoint->retire_data_urb = retire_playback_urb; 1138 subs->running = 1; 1139 return 0; 1140 case SNDRV_PCM_TRIGGER_STOP: 1141 stop_endpoints(subs, 0, 0, 0); 1142 subs->running = 0; 1143 return 0; 1144 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1145 subs->data_endpoint->prepare_data_urb = NULL; 1146 subs->data_endpoint->retire_data_urb = NULL; 1147 subs->running = 0; 1148 return 0; 1149 } 1150 1151 return -EINVAL; 1152 } 1153 1154 static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, 1155 int cmd) 1156 { 1157 int err; 1158 struct snd_usb_substream *subs = substream->runtime->private_data; 1159 1160 switch (cmd) { 1161 case SNDRV_PCM_TRIGGER_START: 1162 err = start_endpoints(subs); 1163 if (err < 0) 1164 return err; 1165 1166 subs->data_endpoint->retire_data_urb = retire_capture_urb; 1167 subs->running = 1; 1168 return 0; 1169 case SNDRV_PCM_TRIGGER_STOP: 1170 stop_endpoints(subs, 0, 0, 0); 1171 subs->running = 0; 1172 return 0; 1173 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1174 subs->data_endpoint->retire_data_urb = NULL; 1175 subs->running = 0; 1176 return 0; 1177 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1178 subs->data_endpoint->retire_data_urb = retire_capture_urb; 1179 subs->running = 1; 1180 return 0; 1181 } 1182 1183 return -EINVAL; 1184 } 1185 1186 static struct snd_pcm_ops snd_usb_playback_ops = { 1187 .open = snd_usb_playback_open, 1188 .close = snd_usb_playback_close, 1189 .ioctl = snd_pcm_lib_ioctl, 1190 .hw_params = snd_usb_hw_params, 1191 .hw_free = snd_usb_hw_free, 1192 .prepare = snd_usb_pcm_prepare, 1193 .trigger = snd_usb_substream_playback_trigger, 1194 .pointer = snd_usb_pcm_pointer, 1195 .page = snd_pcm_lib_get_vmalloc_page, 1196 .mmap = snd_pcm_lib_mmap_vmalloc, 1197 }; 1198 1199 static struct snd_pcm_ops snd_usb_capture_ops = { 1200 .open = snd_usb_capture_open, 1201 .close = snd_usb_capture_close, 1202 .ioctl = snd_pcm_lib_ioctl, 1203 .hw_params = snd_usb_hw_params, 1204 .hw_free = snd_usb_hw_free, 1205 .prepare = snd_usb_pcm_prepare, 1206 .trigger = snd_usb_substream_capture_trigger, 1207 .pointer = snd_usb_pcm_pointer, 1208 .page = snd_pcm_lib_get_vmalloc_page, 1209 .mmap = snd_pcm_lib_mmap_vmalloc, 1210 }; 1211 1212 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) 1213 { 1214 snd_pcm_set_ops(pcm, stream, 1215 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1216 &snd_usb_playback_ops : &snd_usb_capture_ops); 1217 } 1218