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 deactivate_endpoints(struct snd_usb_substream *subs) 265 { 266 int reta, retb; 267 268 reta = snd_usb_endpoint_deactivate(subs->sync_endpoint); 269 retb = snd_usb_endpoint_deactivate(subs->data_endpoint); 270 271 if (reta < 0) 272 return reta; 273 274 if (retb < 0) 275 return retb; 276 277 return 0; 278 } 279 280 /* 281 * find a matching format and set up the interface 282 */ 283 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt) 284 { 285 struct usb_device *dev = subs->dev; 286 struct usb_host_interface *alts; 287 struct usb_interface_descriptor *altsd; 288 struct usb_interface *iface; 289 unsigned int ep, attr; 290 int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; 291 int err, implicit_fb = 0; 292 293 iface = usb_ifnum_to_if(dev, fmt->iface); 294 if (WARN_ON(!iface)) 295 return -EINVAL; 296 alts = &iface->altsetting[fmt->altset_idx]; 297 altsd = get_iface_desc(alts); 298 if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting)) 299 return -EINVAL; 300 301 if (fmt == subs->cur_audiofmt) 302 return 0; 303 304 /* close the old interface */ 305 if (subs->interface >= 0 && subs->interface != fmt->iface) { 306 err = usb_set_interface(subs->dev, subs->interface, 0); 307 if (err < 0) { 308 snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed (%d)\n", 309 dev->devnum, fmt->iface, fmt->altsetting, err); 310 return -EIO; 311 } 312 subs->interface = -1; 313 subs->altset_idx = 0; 314 } 315 316 /* set interface */ 317 if (subs->interface != fmt->iface || 318 subs->altset_idx != fmt->altset_idx) { 319 err = usb_set_interface(dev, fmt->iface, fmt->altsetting); 320 if (err < 0) { 321 snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed (%d)\n", 322 dev->devnum, fmt->iface, fmt->altsetting, err); 323 return -EIO; 324 } 325 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", 326 fmt->iface, fmt->altsetting); 327 subs->interface = fmt->iface; 328 subs->altset_idx = fmt->altset_idx; 329 } 330 331 subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip, 332 alts, fmt->endpoint, subs->direction, 333 SND_USB_ENDPOINT_TYPE_DATA); 334 if (!subs->data_endpoint) 335 return -EINVAL; 336 337 /* we need a sync pipe in async OUT or adaptive IN mode */ 338 /* check the number of EP, since some devices have broken 339 * descriptors which fool us. if it has only one EP, 340 * assume it as adaptive-out or sync-in. 341 */ 342 attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; 343 344 switch (subs->stream->chip->usb_id) { 345 case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */ 346 case USB_ID(0x0763, 0x2081): 347 if (is_playback) { 348 implicit_fb = 1; 349 ep = 0x81; 350 iface = usb_ifnum_to_if(dev, 2); 351 352 if (!iface || iface->num_altsetting == 0) 353 return -EINVAL; 354 355 alts = &iface->altsetting[1]; 356 goto add_sync_ep; 357 } 358 } 359 360 if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) || 361 (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) && 362 altsd->bNumEndpoints >= 2) { 363 /* check sync-pipe endpoint */ 364 /* ... and check descriptor size before accessing bSynchAddress 365 because there is a version of the SB Audigy 2 NX firmware lacking 366 the audio fields in the endpoint descriptors */ 367 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 || 368 (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && 369 get_endpoint(alts, 1)->bSynchAddress != 0 && 370 !implicit_fb)) { 371 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n", 372 dev->devnum, fmt->iface, fmt->altsetting, 373 get_endpoint(alts, 1)->bmAttributes, 374 get_endpoint(alts, 1)->bLength, 375 get_endpoint(alts, 1)->bSynchAddress); 376 return -EINVAL; 377 } 378 ep = get_endpoint(alts, 1)->bEndpointAddress; 379 if (!implicit_fb && 380 get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && 381 (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || 382 (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { 383 snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n", 384 dev->devnum, fmt->iface, fmt->altsetting, 385 is_playback, ep, get_endpoint(alts, 0)->bSynchAddress); 386 return -EINVAL; 387 } 388 389 implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK) 390 == USB_ENDPOINT_USAGE_IMPLICIT_FB; 391 392 add_sync_ep: 393 subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip, 394 alts, ep, !subs->direction, 395 implicit_fb ? 396 SND_USB_ENDPOINT_TYPE_DATA : 397 SND_USB_ENDPOINT_TYPE_SYNC); 398 if (!subs->sync_endpoint) 399 return -EINVAL; 400 401 subs->data_endpoint->sync_master = subs->sync_endpoint; 402 } 403 404 if ((err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt)) < 0) 405 return err; 406 407 subs->cur_audiofmt = fmt; 408 409 snd_usb_set_format_quirk(subs, fmt); 410 411 #if 0 412 printk(KERN_DEBUG 413 "setting done: format = %d, rate = %d..%d, channels = %d\n", 414 fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels); 415 printk(KERN_DEBUG 416 " datapipe = 0x%0x, syncpipe = 0x%0x\n", 417 subs->datapipe, subs->syncpipe); 418 #endif 419 420 return 0; 421 } 422 423 /* 424 * hw_params callback 425 * 426 * allocate a buffer and set the given audio format. 427 * 428 * so far we use a physically linear buffer although packetize transfer 429 * doesn't need a continuous area. 430 * if sg buffer is supported on the later version of alsa, we'll follow 431 * that. 432 */ 433 static int snd_usb_hw_params(struct snd_pcm_substream *substream, 434 struct snd_pcm_hw_params *hw_params) 435 { 436 struct snd_usb_substream *subs = substream->runtime->private_data; 437 struct audioformat *fmt; 438 unsigned int channels, rate, format; 439 int ret, changed; 440 441 ret = snd_pcm_lib_alloc_vmalloc_buffer(substream, 442 params_buffer_bytes(hw_params)); 443 if (ret < 0) 444 return ret; 445 446 format = params_format(hw_params); 447 rate = params_rate(hw_params); 448 channels = params_channels(hw_params); 449 fmt = find_format(subs, format, rate, channels); 450 if (!fmt) { 451 snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n", 452 format, rate, channels); 453 return -EINVAL; 454 } 455 456 changed = subs->cur_audiofmt != fmt || 457 subs->period_bytes != params_period_bytes(hw_params) || 458 subs->cur_rate != rate; 459 if ((ret = set_format(subs, fmt)) < 0) 460 return ret; 461 462 if (subs->cur_rate != rate) { 463 struct usb_host_interface *alts; 464 struct usb_interface *iface; 465 iface = usb_ifnum_to_if(subs->dev, fmt->iface); 466 alts = &iface->altsetting[fmt->altset_idx]; 467 ret = snd_usb_init_sample_rate(subs->stream->chip, fmt->iface, alts, fmt, rate); 468 if (ret < 0) 469 return ret; 470 subs->cur_rate = rate; 471 } 472 473 if (changed) { 474 mutex_lock(&subs->stream->chip->shutdown_mutex); 475 /* format changed */ 476 stop_endpoints(subs, 0, 0, 0); 477 ret = snd_usb_endpoint_set_params(subs->data_endpoint, hw_params, fmt, 478 subs->sync_endpoint); 479 if (ret < 0) 480 goto unlock; 481 482 if (subs->sync_endpoint) 483 ret = snd_usb_endpoint_set_params(subs->sync_endpoint, 484 hw_params, fmt, NULL); 485 unlock: 486 mutex_unlock(&subs->stream->chip->shutdown_mutex); 487 } 488 489 if (ret == 0) { 490 subs->interface = fmt->iface; 491 subs->altset_idx = fmt->altset_idx; 492 } 493 494 return ret; 495 } 496 497 /* 498 * hw_free callback 499 * 500 * reset the audio format and release the buffer 501 */ 502 static int snd_usb_hw_free(struct snd_pcm_substream *substream) 503 { 504 struct snd_usb_substream *subs = substream->runtime->private_data; 505 506 subs->cur_audiofmt = NULL; 507 subs->cur_rate = 0; 508 subs->period_bytes = 0; 509 mutex_lock(&subs->stream->chip->shutdown_mutex); 510 stop_endpoints(subs, 0, 1, 1); 511 deactivate_endpoints(subs); 512 mutex_unlock(&subs->stream->chip->shutdown_mutex); 513 return snd_pcm_lib_free_vmalloc_buffer(substream); 514 } 515 516 /* 517 * prepare callback 518 * 519 * only a few subtle things... 520 */ 521 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) 522 { 523 struct snd_pcm_runtime *runtime = substream->runtime; 524 struct snd_usb_substream *subs = runtime->private_data; 525 526 if (! subs->cur_audiofmt) { 527 snd_printk(KERN_ERR "usbaudio: no format is specified!\n"); 528 return -ENXIO; 529 } 530 531 if (snd_BUG_ON(!subs->data_endpoint)) 532 return -EIO; 533 534 /* some unit conversions in runtime */ 535 subs->data_endpoint->maxframesize = 536 bytes_to_frames(runtime, subs->data_endpoint->maxpacksize); 537 subs->data_endpoint->curframesize = 538 bytes_to_frames(runtime, subs->data_endpoint->curpacksize); 539 540 /* reset the pointer */ 541 subs->hwptr_done = 0; 542 subs->transfer_done = 0; 543 subs->last_delay = 0; 544 subs->last_frame_number = 0; 545 runtime->delay = 0; 546 547 /* for playback, submit the URBs now; otherwise, the first hwptr_done 548 * updates for all URBs would happen at the same time when starting */ 549 if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) 550 return start_endpoints(subs); 551 552 return 0; 553 } 554 555 static struct snd_pcm_hardware snd_usb_hardware = 556 { 557 .info = SNDRV_PCM_INFO_MMAP | 558 SNDRV_PCM_INFO_MMAP_VALID | 559 SNDRV_PCM_INFO_BATCH | 560 SNDRV_PCM_INFO_INTERLEAVED | 561 SNDRV_PCM_INFO_BLOCK_TRANSFER | 562 SNDRV_PCM_INFO_PAUSE, 563 .buffer_bytes_max = 1024 * 1024, 564 .period_bytes_min = 64, 565 .period_bytes_max = 512 * 1024, 566 .periods_min = 2, 567 .periods_max = 1024, 568 }; 569 570 static int hw_check_valid_format(struct snd_usb_substream *subs, 571 struct snd_pcm_hw_params *params, 572 struct audioformat *fp) 573 { 574 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 575 struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 576 struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 577 struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); 578 struct snd_mask check_fmts; 579 unsigned int ptime; 580 581 /* check the format */ 582 snd_mask_none(&check_fmts); 583 check_fmts.bits[0] = (u32)fp->formats; 584 check_fmts.bits[1] = (u32)(fp->formats >> 32); 585 snd_mask_intersect(&check_fmts, fmts); 586 if (snd_mask_empty(&check_fmts)) { 587 hwc_debug(" > check: no supported format %d\n", fp->format); 588 return 0; 589 } 590 /* check the channels */ 591 if (fp->channels < ct->min || fp->channels > ct->max) { 592 hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); 593 return 0; 594 } 595 /* check the rate is within the range */ 596 if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { 597 hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); 598 return 0; 599 } 600 if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { 601 hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); 602 return 0; 603 } 604 /* check whether the period time is >= the data packet interval */ 605 if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) { 606 ptime = 125 * (1 << fp->datainterval); 607 if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { 608 hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max); 609 return 0; 610 } 611 } 612 return 1; 613 } 614 615 static int hw_rule_rate(struct snd_pcm_hw_params *params, 616 struct snd_pcm_hw_rule *rule) 617 { 618 struct snd_usb_substream *subs = rule->private; 619 struct list_head *p; 620 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 621 unsigned int rmin, rmax; 622 int changed; 623 624 hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); 625 changed = 0; 626 rmin = rmax = 0; 627 list_for_each(p, &subs->fmt_list) { 628 struct audioformat *fp; 629 fp = list_entry(p, struct audioformat, list); 630 if (!hw_check_valid_format(subs, params, fp)) 631 continue; 632 if (changed++) { 633 if (rmin > fp->rate_min) 634 rmin = fp->rate_min; 635 if (rmax < fp->rate_max) 636 rmax = fp->rate_max; 637 } else { 638 rmin = fp->rate_min; 639 rmax = fp->rate_max; 640 } 641 } 642 643 if (!changed) { 644 hwc_debug(" --> get empty\n"); 645 it->empty = 1; 646 return -EINVAL; 647 } 648 649 changed = 0; 650 if (it->min < rmin) { 651 it->min = rmin; 652 it->openmin = 0; 653 changed = 1; 654 } 655 if (it->max > rmax) { 656 it->max = rmax; 657 it->openmax = 0; 658 changed = 1; 659 } 660 if (snd_interval_checkempty(it)) { 661 it->empty = 1; 662 return -EINVAL; 663 } 664 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); 665 return changed; 666 } 667 668 669 static int hw_rule_channels(struct snd_pcm_hw_params *params, 670 struct snd_pcm_hw_rule *rule) 671 { 672 struct snd_usb_substream *subs = rule->private; 673 struct list_head *p; 674 struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); 675 unsigned int rmin, rmax; 676 int changed; 677 678 hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max); 679 changed = 0; 680 rmin = rmax = 0; 681 list_for_each(p, &subs->fmt_list) { 682 struct audioformat *fp; 683 fp = list_entry(p, struct audioformat, list); 684 if (!hw_check_valid_format(subs, params, fp)) 685 continue; 686 if (changed++) { 687 if (rmin > fp->channels) 688 rmin = fp->channels; 689 if (rmax < fp->channels) 690 rmax = fp->channels; 691 } else { 692 rmin = fp->channels; 693 rmax = fp->channels; 694 } 695 } 696 697 if (!changed) { 698 hwc_debug(" --> get empty\n"); 699 it->empty = 1; 700 return -EINVAL; 701 } 702 703 changed = 0; 704 if (it->min < rmin) { 705 it->min = rmin; 706 it->openmin = 0; 707 changed = 1; 708 } 709 if (it->max > rmax) { 710 it->max = rmax; 711 it->openmax = 0; 712 changed = 1; 713 } 714 if (snd_interval_checkempty(it)) { 715 it->empty = 1; 716 return -EINVAL; 717 } 718 hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); 719 return changed; 720 } 721 722 static int hw_rule_format(struct snd_pcm_hw_params *params, 723 struct snd_pcm_hw_rule *rule) 724 { 725 struct snd_usb_substream *subs = rule->private; 726 struct list_head *p; 727 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 728 u64 fbits; 729 u32 oldbits[2]; 730 int changed; 731 732 hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); 733 fbits = 0; 734 list_for_each(p, &subs->fmt_list) { 735 struct audioformat *fp; 736 fp = list_entry(p, struct audioformat, list); 737 if (!hw_check_valid_format(subs, params, fp)) 738 continue; 739 fbits |= fp->formats; 740 } 741 742 oldbits[0] = fmt->bits[0]; 743 oldbits[1] = fmt->bits[1]; 744 fmt->bits[0] &= (u32)fbits; 745 fmt->bits[1] &= (u32)(fbits >> 32); 746 if (!fmt->bits[0] && !fmt->bits[1]) { 747 hwc_debug(" --> get empty\n"); 748 return -EINVAL; 749 } 750 changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); 751 hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); 752 return changed; 753 } 754 755 static int hw_rule_period_time(struct snd_pcm_hw_params *params, 756 struct snd_pcm_hw_rule *rule) 757 { 758 struct snd_usb_substream *subs = rule->private; 759 struct audioformat *fp; 760 struct snd_interval *it; 761 unsigned char min_datainterval; 762 unsigned int pmin; 763 int changed; 764 765 it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); 766 hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max); 767 min_datainterval = 0xff; 768 list_for_each_entry(fp, &subs->fmt_list, list) { 769 if (!hw_check_valid_format(subs, params, fp)) 770 continue; 771 min_datainterval = min(min_datainterval, fp->datainterval); 772 } 773 if (min_datainterval == 0xff) { 774 hwc_debug(" --> get empty\n"); 775 it->empty = 1; 776 return -EINVAL; 777 } 778 pmin = 125 * (1 << min_datainterval); 779 changed = 0; 780 if (it->min < pmin) { 781 it->min = pmin; 782 it->openmin = 0; 783 changed = 1; 784 } 785 if (snd_interval_checkempty(it)) { 786 it->empty = 1; 787 return -EINVAL; 788 } 789 hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed); 790 return changed; 791 } 792 793 /* 794 * If the device supports unusual bit rates, does the request meet these? 795 */ 796 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, 797 struct snd_usb_substream *subs) 798 { 799 struct audioformat *fp; 800 int *rate_list; 801 int count = 0, needs_knot = 0; 802 int err; 803 804 kfree(subs->rate_list.list); 805 subs->rate_list.list = NULL; 806 807 list_for_each_entry(fp, &subs->fmt_list, list) { 808 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) 809 return 0; 810 count += fp->nr_rates; 811 if (fp->rates & SNDRV_PCM_RATE_KNOT) 812 needs_knot = 1; 813 } 814 if (!needs_knot) 815 return 0; 816 817 subs->rate_list.list = rate_list = 818 kmalloc(sizeof(int) * count, GFP_KERNEL); 819 if (!subs->rate_list.list) 820 return -ENOMEM; 821 subs->rate_list.count = count; 822 subs->rate_list.mask = 0; 823 count = 0; 824 list_for_each_entry(fp, &subs->fmt_list, list) { 825 int i; 826 for (i = 0; i < fp->nr_rates; i++) 827 rate_list[count++] = fp->rate_table[i]; 828 } 829 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 830 &subs->rate_list); 831 if (err < 0) 832 return err; 833 834 return 0; 835 } 836 837 838 /* 839 * set up the runtime hardware information. 840 */ 841 842 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) 843 { 844 struct list_head *p; 845 unsigned int pt, ptmin; 846 int param_period_time_if_needed; 847 int err; 848 849 runtime->hw.formats = subs->formats; 850 851 runtime->hw.rate_min = 0x7fffffff; 852 runtime->hw.rate_max = 0; 853 runtime->hw.channels_min = 256; 854 runtime->hw.channels_max = 0; 855 runtime->hw.rates = 0; 856 ptmin = UINT_MAX; 857 /* check min/max rates and channels */ 858 list_for_each(p, &subs->fmt_list) { 859 struct audioformat *fp; 860 fp = list_entry(p, struct audioformat, list); 861 runtime->hw.rates |= fp->rates; 862 if (runtime->hw.rate_min > fp->rate_min) 863 runtime->hw.rate_min = fp->rate_min; 864 if (runtime->hw.rate_max < fp->rate_max) 865 runtime->hw.rate_max = fp->rate_max; 866 if (runtime->hw.channels_min > fp->channels) 867 runtime->hw.channels_min = fp->channels; 868 if (runtime->hw.channels_max < fp->channels) 869 runtime->hw.channels_max = fp->channels; 870 if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { 871 /* FIXME: there might be more than one audio formats... */ 872 runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = 873 fp->frame_size; 874 } 875 pt = 125 * (1 << fp->datainterval); 876 ptmin = min(ptmin, pt); 877 } 878 err = snd_usb_autoresume(subs->stream->chip); 879 if (err < 0) 880 return err; 881 882 param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; 883 if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) 884 /* full speed devices have fixed data packet interval */ 885 ptmin = 1000; 886 if (ptmin == 1000) 887 /* if period time doesn't go below 1 ms, no rules needed */ 888 param_period_time_if_needed = -1; 889 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 890 ptmin, UINT_MAX); 891 892 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 893 hw_rule_rate, subs, 894 SNDRV_PCM_HW_PARAM_FORMAT, 895 SNDRV_PCM_HW_PARAM_CHANNELS, 896 param_period_time_if_needed, 897 -1)) < 0) 898 goto rep_err; 899 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, 900 hw_rule_channels, subs, 901 SNDRV_PCM_HW_PARAM_FORMAT, 902 SNDRV_PCM_HW_PARAM_RATE, 903 param_period_time_if_needed, 904 -1)) < 0) 905 goto rep_err; 906 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, 907 hw_rule_format, subs, 908 SNDRV_PCM_HW_PARAM_RATE, 909 SNDRV_PCM_HW_PARAM_CHANNELS, 910 param_period_time_if_needed, 911 -1)) < 0) 912 goto rep_err; 913 if (param_period_time_if_needed >= 0) { 914 err = snd_pcm_hw_rule_add(runtime, 0, 915 SNDRV_PCM_HW_PARAM_PERIOD_TIME, 916 hw_rule_period_time, subs, 917 SNDRV_PCM_HW_PARAM_FORMAT, 918 SNDRV_PCM_HW_PARAM_CHANNELS, 919 SNDRV_PCM_HW_PARAM_RATE, 920 -1); 921 if (err < 0) 922 goto rep_err; 923 } 924 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0) 925 goto rep_err; 926 return 0; 927 928 rep_err: 929 snd_usb_autosuspend(subs->stream->chip); 930 return err; 931 } 932 933 static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction) 934 { 935 struct snd_usb_stream *as = snd_pcm_substream_chip(substream); 936 struct snd_pcm_runtime *runtime = substream->runtime; 937 struct snd_usb_substream *subs = &as->substream[direction]; 938 939 subs->interface = -1; 940 subs->altset_idx = 0; 941 runtime->hw = snd_usb_hardware; 942 runtime->private_data = subs; 943 subs->pcm_substream = substream; 944 /* runtime PM is also done there */ 945 return setup_hw_info(runtime, subs); 946 } 947 948 static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction) 949 { 950 struct snd_usb_stream *as = snd_pcm_substream_chip(substream); 951 struct snd_usb_substream *subs = &as->substream[direction]; 952 953 stop_endpoints(subs, 0, 0, 0); 954 955 if (!as->chip->shutdown && subs->interface >= 0) { 956 usb_set_interface(subs->dev, subs->interface, 0); 957 subs->interface = -1; 958 } 959 960 subs->pcm_substream = NULL; 961 snd_usb_autosuspend(subs->stream->chip); 962 963 return 0; 964 } 965 966 /* Since a URB can handle only a single linear buffer, we must use double 967 * buffering when the data to be transferred overflows the buffer boundary. 968 * To avoid inconsistencies when updating hwptr_done, we use double buffering 969 * for all URBs. 970 */ 971 static void retire_capture_urb(struct snd_usb_substream *subs, 972 struct urb *urb) 973 { 974 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 975 unsigned int stride, frames, bytes, oldptr; 976 int i, period_elapsed = 0; 977 unsigned long flags; 978 unsigned char *cp; 979 980 stride = runtime->frame_bits >> 3; 981 982 for (i = 0; i < urb->number_of_packets; i++) { 983 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset; 984 if (urb->iso_frame_desc[i].status && printk_ratelimit()) { 985 snd_printdd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status); 986 // continue; 987 } 988 bytes = urb->iso_frame_desc[i].actual_length; 989 frames = bytes / stride; 990 if (!subs->txfr_quirk) 991 bytes = frames * stride; 992 if (bytes % (runtime->sample_bits >> 3) != 0) { 993 #ifdef CONFIG_SND_DEBUG_VERBOSE 994 int oldbytes = bytes; 995 #endif 996 bytes = frames * stride; 997 snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n", 998 oldbytes, bytes); 999 } 1000 /* update the current pointer */ 1001 spin_lock_irqsave(&subs->lock, flags); 1002 oldptr = subs->hwptr_done; 1003 subs->hwptr_done += bytes; 1004 if (subs->hwptr_done >= runtime->buffer_size * stride) 1005 subs->hwptr_done -= runtime->buffer_size * stride; 1006 frames = (bytes + (oldptr % stride)) / stride; 1007 subs->transfer_done += frames; 1008 if (subs->transfer_done >= runtime->period_size) { 1009 subs->transfer_done -= runtime->period_size; 1010 period_elapsed = 1; 1011 } 1012 spin_unlock_irqrestore(&subs->lock, flags); 1013 /* copy a data chunk */ 1014 if (oldptr + bytes > runtime->buffer_size * stride) { 1015 unsigned int bytes1 = 1016 runtime->buffer_size * stride - oldptr; 1017 memcpy(runtime->dma_area + oldptr, cp, bytes1); 1018 memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); 1019 } else { 1020 memcpy(runtime->dma_area + oldptr, cp, bytes); 1021 } 1022 } 1023 1024 if (period_elapsed) 1025 snd_pcm_period_elapsed(subs->pcm_substream); 1026 } 1027 1028 static void prepare_playback_urb(struct snd_usb_substream *subs, 1029 struct urb *urb) 1030 { 1031 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 1032 struct snd_urb_ctx *ctx = urb->context; 1033 unsigned int counts, frames, bytes; 1034 int i, stride, period_elapsed = 0; 1035 unsigned long flags; 1036 1037 stride = runtime->frame_bits >> 3; 1038 1039 frames = 0; 1040 urb->number_of_packets = 0; 1041 spin_lock_irqsave(&subs->lock, flags); 1042 for (i = 0; i < ctx->packets; i++) { 1043 counts = ctx->packet_size[i]; 1044 /* set up descriptor */ 1045 urb->iso_frame_desc[i].offset = frames * stride; 1046 urb->iso_frame_desc[i].length = counts * stride; 1047 frames += counts; 1048 urb->number_of_packets++; 1049 subs->transfer_done += counts; 1050 if (subs->transfer_done >= runtime->period_size) { 1051 subs->transfer_done -= runtime->period_size; 1052 period_elapsed = 1; 1053 if (subs->fmt_type == UAC_FORMAT_TYPE_II) { 1054 if (subs->transfer_done > 0) { 1055 /* FIXME: fill-max mode is not 1056 * supported yet */ 1057 frames -= subs->transfer_done; 1058 counts -= subs->transfer_done; 1059 urb->iso_frame_desc[i].length = 1060 counts * stride; 1061 subs->transfer_done = 0; 1062 } 1063 i++; 1064 if (i < ctx->packets) { 1065 /* add a transfer delimiter */ 1066 urb->iso_frame_desc[i].offset = 1067 frames * stride; 1068 urb->iso_frame_desc[i].length = 0; 1069 urb->number_of_packets++; 1070 } 1071 break; 1072 } 1073 } 1074 if (period_elapsed && 1075 !snd_usb_endpoint_implict_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */ 1076 break; 1077 } 1078 bytes = frames * stride; 1079 if (subs->hwptr_done + bytes > runtime->buffer_size * stride) { 1080 /* err, the transferred area goes over buffer boundary. */ 1081 unsigned int bytes1 = 1082 runtime->buffer_size * stride - subs->hwptr_done; 1083 memcpy(urb->transfer_buffer, 1084 runtime->dma_area + subs->hwptr_done, bytes1); 1085 memcpy(urb->transfer_buffer + bytes1, 1086 runtime->dma_area, bytes - bytes1); 1087 } else { 1088 memcpy(urb->transfer_buffer, 1089 runtime->dma_area + subs->hwptr_done, bytes); 1090 } 1091 subs->hwptr_done += bytes; 1092 if (subs->hwptr_done >= runtime->buffer_size * stride) 1093 subs->hwptr_done -= runtime->buffer_size * stride; 1094 runtime->delay += frames; 1095 spin_unlock_irqrestore(&subs->lock, flags); 1096 urb->transfer_buffer_length = bytes; 1097 if (period_elapsed) 1098 snd_pcm_period_elapsed(subs->pcm_substream); 1099 } 1100 1101 /* 1102 * process after playback data complete 1103 * - decrease the delay count again 1104 */ 1105 static void retire_playback_urb(struct snd_usb_substream *subs, 1106 struct urb *urb) 1107 { 1108 unsigned long flags; 1109 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 1110 int stride = runtime->frame_bits >> 3; 1111 int processed = urb->transfer_buffer_length / stride; 1112 1113 spin_lock_irqsave(&subs->lock, flags); 1114 if (processed > runtime->delay) 1115 runtime->delay = 0; 1116 else 1117 runtime->delay -= processed; 1118 spin_unlock_irqrestore(&subs->lock, flags); 1119 } 1120 1121 static int snd_usb_playback_open(struct snd_pcm_substream *substream) 1122 { 1123 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK); 1124 } 1125 1126 static int snd_usb_playback_close(struct snd_pcm_substream *substream) 1127 { 1128 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK); 1129 } 1130 1131 static int snd_usb_capture_open(struct snd_pcm_substream *substream) 1132 { 1133 return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE); 1134 } 1135 1136 static int snd_usb_capture_close(struct snd_pcm_substream *substream) 1137 { 1138 return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE); 1139 } 1140 1141 static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, 1142 int cmd) 1143 { 1144 struct snd_usb_substream *subs = substream->runtime->private_data; 1145 1146 switch (cmd) { 1147 case SNDRV_PCM_TRIGGER_START: 1148 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1149 subs->data_endpoint->prepare_data_urb = prepare_playback_urb; 1150 subs->data_endpoint->retire_data_urb = retire_playback_urb; 1151 subs->running = 1; 1152 return 0; 1153 case SNDRV_PCM_TRIGGER_STOP: 1154 stop_endpoints(subs, 0, 0, 0); 1155 subs->running = 0; 1156 return 0; 1157 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1158 subs->data_endpoint->prepare_data_urb = NULL; 1159 subs->data_endpoint->retire_data_urb = NULL; 1160 subs->running = 0; 1161 return 0; 1162 } 1163 1164 return -EINVAL; 1165 } 1166 1167 static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, 1168 int cmd) 1169 { 1170 int err; 1171 struct snd_usb_substream *subs = substream->runtime->private_data; 1172 1173 switch (cmd) { 1174 case SNDRV_PCM_TRIGGER_START: 1175 err = start_endpoints(subs); 1176 if (err < 0) 1177 return err; 1178 1179 subs->data_endpoint->retire_data_urb = retire_capture_urb; 1180 subs->running = 1; 1181 return 0; 1182 case SNDRV_PCM_TRIGGER_STOP: 1183 stop_endpoints(subs, 0, 0, 0); 1184 subs->running = 0; 1185 return 0; 1186 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 1187 subs->data_endpoint->retire_data_urb = NULL; 1188 subs->running = 0; 1189 return 0; 1190 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 1191 subs->data_endpoint->retire_data_urb = retire_capture_urb; 1192 subs->running = 1; 1193 return 0; 1194 } 1195 1196 return -EINVAL; 1197 } 1198 1199 static struct snd_pcm_ops snd_usb_playback_ops = { 1200 .open = snd_usb_playback_open, 1201 .close = snd_usb_playback_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_playback_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 static struct snd_pcm_ops snd_usb_capture_ops = { 1213 .open = snd_usb_capture_open, 1214 .close = snd_usb_capture_close, 1215 .ioctl = snd_pcm_lib_ioctl, 1216 .hw_params = snd_usb_hw_params, 1217 .hw_free = snd_usb_hw_free, 1218 .prepare = snd_usb_pcm_prepare, 1219 .trigger = snd_usb_substream_capture_trigger, 1220 .pointer = snd_usb_pcm_pointer, 1221 .page = snd_pcm_lib_get_vmalloc_page, 1222 .mmap = snd_pcm_lib_mmap_vmalloc, 1223 }; 1224 1225 void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) 1226 { 1227 snd_pcm_set_ops(pcm, stream, 1228 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1229 &snd_usb_playback_ops : &snd_usb_capture_ops); 1230 } 1231