1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * US-X2Y AUDIO 4 * Copyright (c) 2002-2004 by Karsten Wiese 5 * 6 * based on 7 * 8 * (Tentative) USB Audio Driver for ALSA 9 * 10 * Main and PCM part 11 * 12 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> 13 * 14 * Many codes borrowed from audio.c by 15 * Alan Cox (alan@lxorguk.ukuu.org.uk) 16 * Thomas Sailer (sailer@ife.ee.ethz.ch) 17 */ 18 19 20#include <linux/interrupt.h> 21#include <linux/slab.h> 22#include <linux/usb.h> 23#include <linux/moduleparam.h> 24#include <sound/core.h> 25#include <sound/info.h> 26#include <sound/pcm.h> 27#include <sound/pcm_params.h> 28#include "usx2y.h" 29#include "usbusx2y.h" 30 31#define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb. 32 1 to 4 have been tested ok on uhci. 33 To use 3 on ohci, you'd need a patch: 34 look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on 35 "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425" 36 . 37 1, 2 and 4 work out of the box on ohci, if I recall correctly. 38 Bigger is safer operation, 39 smaller gives lower latencies. 40 */ 41#define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter 42 nrpacks set to 1, you might as well comment 43 this #define out, and thereby produce smaller, faster code. 44 You'd also set USX2Y_NRPACKS to 1 then. 45 */ 46 47#ifdef USX2Y_NRPACKS_VARIABLE 48 static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */ 49 #define nr_of_packs() nrpacks 50 module_param(nrpacks, int, 0444); 51 MODULE_PARM_DESC(nrpacks, "Number of packets per URB."); 52#else 53 #define nr_of_packs() USX2Y_NRPACKS 54#endif 55 56 57static int usx2y_urb_capt_retire(struct snd_usx2y_substream *subs) 58{ 59 struct urb *urb = subs->completed_urb; 60 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 61 unsigned char *cp; 62 int i, len, lens = 0, hwptr_done = subs->hwptr_done; 63 struct usx2ydev *usx2y = subs->usx2y; 64 65 for (i = 0; i < nr_of_packs(); i++) { 66 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset; 67 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */ 68 snd_printk(KERN_ERR "active frame status %i. " 69 "Most probably some hardware problem.\n", 70 urb->iso_frame_desc[i].status); 71 return urb->iso_frame_desc[i].status; 72 } 73 len = urb->iso_frame_desc[i].actual_length / usx2y->stride; 74 if (! len) { 75 snd_printd("0 == len ERROR!\n"); 76 continue; 77 } 78 79 /* copy a data chunk */ 80 if ((hwptr_done + len) > runtime->buffer_size) { 81 int cnt = runtime->buffer_size - hwptr_done; 82 int blen = cnt * usx2y->stride; 83 memcpy(runtime->dma_area + hwptr_done * usx2y->stride, cp, blen); 84 memcpy(runtime->dma_area, cp + blen, len * usx2y->stride - blen); 85 } else { 86 memcpy(runtime->dma_area + hwptr_done * usx2y->stride, cp, 87 len * usx2y->stride); 88 } 89 lens += len; 90 if ((hwptr_done += len) >= runtime->buffer_size) 91 hwptr_done -= runtime->buffer_size; 92 } 93 94 subs->hwptr_done = hwptr_done; 95 subs->transfer_done += lens; 96 /* update the pointer, call callback if necessary */ 97 if (subs->transfer_done >= runtime->period_size) { 98 subs->transfer_done -= runtime->period_size; 99 snd_pcm_period_elapsed(subs->pcm_substream); 100 } 101 return 0; 102} 103/* 104 * prepare urb for playback data pipe 105 * 106 * we copy the data directly from the pcm buffer. 107 * the current position to be copied is held in hwptr field. 108 * since a urb can handle only a single linear buffer, if the total 109 * transferred area overflows the buffer boundary, we cannot send 110 * it directly from the buffer. thus the data is once copied to 111 * a temporary buffer and urb points to that. 112 */ 113static int usx2y_urb_play_prepare(struct snd_usx2y_substream *subs, 114 struct urb *cap_urb, 115 struct urb *urb) 116{ 117 int count, counts, pack; 118 struct usx2ydev *usx2y = subs->usx2y; 119 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 120 121 count = 0; 122 for (pack = 0; pack < nr_of_packs(); pack++) { 123 /* calculate the size of a packet */ 124 counts = cap_urb->iso_frame_desc[pack].actual_length / usx2y->stride; 125 count += counts; 126 if (counts < 43 || counts > 50) { 127 snd_printk(KERN_ERR "should not be here with counts=%i\n", counts); 128 return -EPIPE; 129 } 130 /* set up descriptor */ 131 urb->iso_frame_desc[pack].offset = pack ? 132 urb->iso_frame_desc[pack - 1].offset + 133 urb->iso_frame_desc[pack - 1].length : 134 0; 135 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length; 136 } 137 if (atomic_read(&subs->state) >= STATE_PRERUNNING) 138 if (subs->hwptr + count > runtime->buffer_size) { 139 /* err, the transferred area goes over buffer boundary. 140 * copy the data to the temp buffer. 141 */ 142 int len; 143 len = runtime->buffer_size - subs->hwptr; 144 urb->transfer_buffer = subs->tmpbuf; 145 memcpy(subs->tmpbuf, runtime->dma_area + 146 subs->hwptr * usx2y->stride, len * usx2y->stride); 147 memcpy(subs->tmpbuf + len * usx2y->stride, 148 runtime->dma_area, (count - len) * usx2y->stride); 149 subs->hwptr += count; 150 subs->hwptr -= runtime->buffer_size; 151 } else { 152 /* set the buffer pointer */ 153 urb->transfer_buffer = runtime->dma_area + subs->hwptr * usx2y->stride; 154 if ((subs->hwptr += count) >= runtime->buffer_size) 155 subs->hwptr -= runtime->buffer_size; 156 } 157 else 158 urb->transfer_buffer = subs->tmpbuf; 159 urb->transfer_buffer_length = count * usx2y->stride; 160 return 0; 161} 162 163/* 164 * process after playback data complete 165 * 166 * update the current position and call callback if a period is processed. 167 */ 168static void usx2y_urb_play_retire(struct snd_usx2y_substream *subs, struct urb *urb) 169{ 170 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 171 int len = urb->actual_length / subs->usx2y->stride; 172 173 subs->transfer_done += len; 174 subs->hwptr_done += len; 175 if (subs->hwptr_done >= runtime->buffer_size) 176 subs->hwptr_done -= runtime->buffer_size; 177 if (subs->transfer_done >= runtime->period_size) { 178 subs->transfer_done -= runtime->period_size; 179 snd_pcm_period_elapsed(subs->pcm_substream); 180 } 181} 182 183static int usx2y_urb_submit(struct snd_usx2y_substream *subs, struct urb *urb, int frame) 184{ 185 int err; 186 if (!urb) 187 return -ENODEV; 188 urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks 189 urb->hcpriv = NULL; 190 urb->dev = subs->usx2y->dev; /* we need to set this at each time */ 191 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { 192 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err); 193 return err; 194 } 195 return 0; 196} 197 198static inline int usx2y_usbframe_complete(struct snd_usx2y_substream *capsubs, 199 struct snd_usx2y_substream *playbacksubs, 200 int frame) 201{ 202 int err, state; 203 struct urb *urb = playbacksubs->completed_urb; 204 205 state = atomic_read(&playbacksubs->state); 206 if (NULL != urb) { 207 if (state == STATE_RUNNING) 208 usx2y_urb_play_retire(playbacksubs, urb); 209 else if (state >= STATE_PRERUNNING) 210 atomic_inc(&playbacksubs->state); 211 } else { 212 switch (state) { 213 case STATE_STARTING1: 214 urb = playbacksubs->urb[0]; 215 atomic_inc(&playbacksubs->state); 216 break; 217 case STATE_STARTING2: 218 urb = playbacksubs->urb[1]; 219 atomic_inc(&playbacksubs->state); 220 break; 221 } 222 } 223 if (urb) { 224 if ((err = usx2y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) || 225 (err = usx2y_urb_submit(playbacksubs, urb, frame))) { 226 return err; 227 } 228 } 229 230 playbacksubs->completed_urb = NULL; 231 232 state = atomic_read(&capsubs->state); 233 if (state >= STATE_PREPARED) { 234 if (state == STATE_RUNNING) { 235 if ((err = usx2y_urb_capt_retire(capsubs))) 236 return err; 237 } else if (state >= STATE_PRERUNNING) 238 atomic_inc(&capsubs->state); 239 if ((err = usx2y_urb_submit(capsubs, capsubs->completed_urb, frame))) 240 return err; 241 } 242 capsubs->completed_urb = NULL; 243 return 0; 244} 245 246 247static void usx2y_clients_stop(struct usx2ydev *usx2y) 248{ 249 int s, u; 250 251 for (s = 0; s < 4; s++) { 252 struct snd_usx2y_substream *subs = usx2y->subs[s]; 253 if (subs) { 254 snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state)); 255 atomic_set(&subs->state, STATE_STOPPED); 256 } 257 } 258 for (s = 0; s < 4; s++) { 259 struct snd_usx2y_substream *subs = usx2y->subs[s]; 260 if (subs) { 261 if (atomic_read(&subs->state) >= STATE_PRERUNNING) 262 snd_pcm_stop_xrun(subs->pcm_substream); 263 for (u = 0; u < NRURBS; u++) { 264 struct urb *urb = subs->urb[u]; 265 if (NULL != urb) 266 snd_printdd("%i status=%i start_frame=%i\n", 267 u, urb->status, urb->start_frame); 268 } 269 } 270 } 271 usx2y->prepare_subs = NULL; 272 wake_up(&usx2y->prepare_wait_queue); 273} 274 275static void usx2y_error_urb_status(struct usx2ydev *usx2y, 276 struct snd_usx2y_substream *subs, struct urb *urb) 277{ 278 snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status); 279 urb->status = 0; 280 usx2y_clients_stop(usx2y); 281} 282 283static void i_usx2y_urb_complete(struct urb *urb) 284{ 285 struct snd_usx2y_substream *subs = urb->context; 286 struct usx2ydev *usx2y = subs->usx2y; 287 288 if (unlikely(atomic_read(&subs->state) < STATE_PREPARED)) { 289 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n", 290 usb_get_current_frame_number(usx2y->dev), 291 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", 292 urb->status, urb->start_frame); 293 return; 294 } 295 if (unlikely(urb->status)) { 296 usx2y_error_urb_status(usx2y, subs, urb); 297 return; 298 } 299 300 subs->completed_urb = urb; 301 302 { 303 struct snd_usx2y_substream *capsubs = usx2y->subs[SNDRV_PCM_STREAM_CAPTURE], 304 *playbacksubs = usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK]; 305 if (capsubs->completed_urb && 306 atomic_read(&capsubs->state) >= STATE_PREPARED && 307 (playbacksubs->completed_urb || 308 atomic_read(&playbacksubs->state) < STATE_PREPARED)) { 309 if (!usx2y_usbframe_complete(capsubs, playbacksubs, urb->start_frame)) 310 usx2y->wait_iso_frame += nr_of_packs(); 311 else { 312 snd_printdd("\n"); 313 usx2y_clients_stop(usx2y); 314 } 315 } 316 } 317} 318 319static void usx2y_urbs_set_complete(struct usx2ydev * usx2y, 320 void (*complete)(struct urb *)) 321{ 322 int s, u; 323 for (s = 0; s < 4; s++) { 324 struct snd_usx2y_substream *subs = usx2y->subs[s]; 325 if (NULL != subs) 326 for (u = 0; u < NRURBS; u++) { 327 struct urb * urb = subs->urb[u]; 328 if (NULL != urb) 329 urb->complete = complete; 330 } 331 } 332} 333 334static void usx2y_subs_startup_finish(struct usx2ydev * usx2y) 335{ 336 usx2y_urbs_set_complete(usx2y, i_usx2y_urb_complete); 337 usx2y->prepare_subs = NULL; 338} 339 340static void i_usx2y_subs_startup(struct urb *urb) 341{ 342 struct snd_usx2y_substream *subs = urb->context; 343 struct usx2ydev *usx2y = subs->usx2y; 344 struct snd_usx2y_substream *prepare_subs = usx2y->prepare_subs; 345 if (NULL != prepare_subs) 346 if (urb->start_frame == prepare_subs->urb[0]->start_frame) { 347 usx2y_subs_startup_finish(usx2y); 348 atomic_inc(&prepare_subs->state); 349 wake_up(&usx2y->prepare_wait_queue); 350 } 351 352 i_usx2y_urb_complete(urb); 353} 354 355static void usx2y_subs_prepare(struct snd_usx2y_substream *subs) 356{ 357 snd_printdd("usx2y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n", 358 subs, subs->endpoint, subs->urb[0], subs->urb[1]); 359 /* reset the pointer */ 360 subs->hwptr = 0; 361 subs->hwptr_done = 0; 362 subs->transfer_done = 0; 363} 364 365 366static void usx2y_urb_release(struct urb **urb, int free_tb) 367{ 368 if (*urb) { 369 usb_kill_urb(*urb); 370 if (free_tb) 371 kfree((*urb)->transfer_buffer); 372 usb_free_urb(*urb); 373 *urb = NULL; 374 } 375} 376/* 377 * release a substreams urbs 378 */ 379static void usx2y_urbs_release(struct snd_usx2y_substream *subs) 380{ 381 int i; 382 snd_printdd("usx2y_urbs_release() %i\n", subs->endpoint); 383 for (i = 0; i < NRURBS; i++) 384 usx2y_urb_release(subs->urb + i, 385 subs != subs->usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK]); 386 387 kfree(subs->tmpbuf); 388 subs->tmpbuf = NULL; 389} 390/* 391 * initialize a substream's urbs 392 */ 393static int usx2y_urbs_allocate(struct snd_usx2y_substream *subs) 394{ 395 int i; 396 unsigned int pipe; 397 int is_playback = subs == subs->usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK]; 398 struct usb_device *dev = subs->usx2y->dev; 399 400 pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) : 401 usb_rcvisocpipe(dev, subs->endpoint); 402 subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback); 403 if (!subs->maxpacksize) 404 return -EINVAL; 405 406 if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */ 407 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL); 408 if (!subs->tmpbuf) 409 return -ENOMEM; 410 } 411 /* allocate and initialize data urbs */ 412 for (i = 0; i < NRURBS; i++) { 413 struct urb **purb = subs->urb + i; 414 if (*purb) { 415 usb_kill_urb(*purb); 416 continue; 417 } 418 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL); 419 if (NULL == *purb) { 420 usx2y_urbs_release(subs); 421 return -ENOMEM; 422 } 423 if (!is_playback && !(*purb)->transfer_buffer) { 424 /* allocate a capture buffer per urb */ 425 (*purb)->transfer_buffer = 426 kmalloc_array(subs->maxpacksize, 427 nr_of_packs(), GFP_KERNEL); 428 if (NULL == (*purb)->transfer_buffer) { 429 usx2y_urbs_release(subs); 430 return -ENOMEM; 431 } 432 } 433 (*purb)->dev = dev; 434 (*purb)->pipe = pipe; 435 (*purb)->number_of_packets = nr_of_packs(); 436 (*purb)->context = subs; 437 (*purb)->interval = 1; 438 (*purb)->complete = i_usx2y_subs_startup; 439 } 440 return 0; 441} 442 443static void usx2y_subs_startup(struct snd_usx2y_substream *subs) 444{ 445 struct usx2ydev *usx2y = subs->usx2y; 446 usx2y->prepare_subs = subs; 447 subs->urb[0]->start_frame = -1; 448 wmb(); 449 usx2y_urbs_set_complete(usx2y, i_usx2y_subs_startup); 450} 451 452static int usx2y_urbs_start(struct snd_usx2y_substream *subs) 453{ 454 int i, err; 455 struct usx2ydev *usx2y = subs->usx2y; 456 457 if ((err = usx2y_urbs_allocate(subs)) < 0) 458 return err; 459 subs->completed_urb = NULL; 460 for (i = 0; i < 4; i++) { 461 struct snd_usx2y_substream *subs = usx2y->subs[i]; 462 if (subs != NULL && atomic_read(&subs->state) >= STATE_PREPARED) 463 goto start; 464 } 465 466 start: 467 usx2y_subs_startup(subs); 468 for (i = 0; i < NRURBS; i++) { 469 struct urb *urb = subs->urb[i]; 470 if (usb_pipein(urb->pipe)) { 471 unsigned long pack; 472 if (0 == i) 473 atomic_set(&subs->state, STATE_STARTING3); 474 urb->dev = usx2y->dev; 475 for (pack = 0; pack < nr_of_packs(); pack++) { 476 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack; 477 urb->iso_frame_desc[pack].length = subs->maxpacksize; 478 } 479 urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); 480 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { 481 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err); 482 err = -EPIPE; 483 goto cleanup; 484 } else 485 if (i == 0) 486 usx2y->wait_iso_frame = urb->start_frame; 487 urb->transfer_flags = 0; 488 } else { 489 atomic_set(&subs->state, STATE_STARTING1); 490 break; 491 } 492 } 493 err = 0; 494 wait_event(usx2y->prepare_wait_queue, NULL == usx2y->prepare_subs); 495 if (atomic_read(&subs->state) != STATE_PREPARED) 496 err = -EPIPE; 497 498 cleanup: 499 if (err) { 500 usx2y_subs_startup_finish(usx2y); 501 usx2y_clients_stop(usx2y); // something is completely wroong > stop evrything 502 } 503 return err; 504} 505 506/* 507 * return the current pcm pointer. just return the hwptr_done value. 508 */ 509static snd_pcm_uframes_t snd_usx2y_pcm_pointer(struct snd_pcm_substream *substream) 510{ 511 struct snd_usx2y_substream *subs = substream->runtime->private_data; 512 return subs->hwptr_done; 513} 514/* 515 * start/stop substream 516 */ 517static int snd_usx2y_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 518{ 519 struct snd_usx2y_substream *subs = substream->runtime->private_data; 520 521 switch (cmd) { 522 case SNDRV_PCM_TRIGGER_START: 523 snd_printdd("snd_usx2y_pcm_trigger(START)\n"); 524 if (atomic_read(&subs->state) == STATE_PREPARED && 525 atomic_read(&subs->usx2y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= STATE_PREPARED) { 526 atomic_set(&subs->state, STATE_PRERUNNING); 527 } else { 528 snd_printdd("\n"); 529 return -EPIPE; 530 } 531 break; 532 case SNDRV_PCM_TRIGGER_STOP: 533 snd_printdd("snd_usx2y_pcm_trigger(STOP)\n"); 534 if (atomic_read(&subs->state) >= STATE_PRERUNNING) 535 atomic_set(&subs->state, STATE_PREPARED); 536 break; 537 default: 538 return -EINVAL; 539 } 540 return 0; 541} 542 543 544/* 545 * allocate a buffer, setup samplerate 546 * 547 * so far we use a physically linear buffer although packetize transfer 548 * doesn't need a continuous area. 549 * if sg buffer is supported on the later version of alsa, we'll follow 550 * that. 551 */ 552static const struct s_c2 553{ 554 char c1, c2; 555} 556 setrate_44100[] = 557{ 558 { 0x14, 0x08}, // this line sets 44100, well actually a little less 559 { 0x18, 0x40}, // only tascam / frontier design knows the further lines ....... 560 { 0x18, 0x42}, 561 { 0x18, 0x45}, 562 { 0x18, 0x46}, 563 { 0x18, 0x48}, 564 { 0x18, 0x4A}, 565 { 0x18, 0x4C}, 566 { 0x18, 0x4E}, 567 { 0x18, 0x50}, 568 { 0x18, 0x52}, 569 { 0x18, 0x54}, 570 { 0x18, 0x56}, 571 { 0x18, 0x58}, 572 { 0x18, 0x5A}, 573 { 0x18, 0x5C}, 574 { 0x18, 0x5E}, 575 { 0x18, 0x60}, 576 { 0x18, 0x62}, 577 { 0x18, 0x64}, 578 { 0x18, 0x66}, 579 { 0x18, 0x68}, 580 { 0x18, 0x6A}, 581 { 0x18, 0x6C}, 582 { 0x18, 0x6E}, 583 { 0x18, 0x70}, 584 { 0x18, 0x72}, 585 { 0x18, 0x74}, 586 { 0x18, 0x76}, 587 { 0x18, 0x78}, 588 { 0x18, 0x7A}, 589 { 0x18, 0x7C}, 590 { 0x18, 0x7E} 591}; 592static const struct s_c2 setrate_48000[] = 593{ 594 { 0x14, 0x09}, // this line sets 48000, well actually a little less 595 { 0x18, 0x40}, // only tascam / frontier design knows the further lines ....... 596 { 0x18, 0x42}, 597 { 0x18, 0x45}, 598 { 0x18, 0x46}, 599 { 0x18, 0x48}, 600 { 0x18, 0x4A}, 601 { 0x18, 0x4C}, 602 { 0x18, 0x4E}, 603 { 0x18, 0x50}, 604 { 0x18, 0x52}, 605 { 0x18, 0x54}, 606 { 0x18, 0x56}, 607 { 0x18, 0x58}, 608 { 0x18, 0x5A}, 609 { 0x18, 0x5C}, 610 { 0x18, 0x5E}, 611 { 0x18, 0x60}, 612 { 0x18, 0x62}, 613 { 0x18, 0x64}, 614 { 0x18, 0x66}, 615 { 0x18, 0x68}, 616 { 0x18, 0x6A}, 617 { 0x18, 0x6C}, 618 { 0x18, 0x6E}, 619 { 0x18, 0x70}, 620 { 0x18, 0x73}, 621 { 0x18, 0x74}, 622 { 0x18, 0x76}, 623 { 0x18, 0x78}, 624 { 0x18, 0x7A}, 625 { 0x18, 0x7C}, 626 { 0x18, 0x7E} 627}; 628#define NOOF_SETRATE_URBS ARRAY_SIZE(setrate_48000) 629 630static void i_usx2y_04int(struct urb *urb) 631{ 632 struct usx2ydev *usx2y = urb->context; 633 634 if (urb->status) 635 snd_printk(KERN_ERR "snd_usx2y_04int() urb->status=%i\n", urb->status); 636 if (0 == --usx2y->us04->len) 637 wake_up(&usx2y->in04_wait_queue); 638} 639 640static int usx2y_rate_set(struct usx2ydev *usx2y, int rate) 641{ 642 int err = 0, i; 643 struct snd_usx2y_urb_seq *us = NULL; 644 int *usbdata = NULL; 645 const struct s_c2 *ra = rate == 48000 ? setrate_48000 : setrate_44100; 646 647 if (usx2y->rate != rate) { 648 us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL); 649 if (NULL == us) { 650 err = -ENOMEM; 651 goto cleanup; 652 } 653 usbdata = kmalloc_array(NOOF_SETRATE_URBS, sizeof(int), 654 GFP_KERNEL); 655 if (NULL == usbdata) { 656 err = -ENOMEM; 657 goto cleanup; 658 } 659 for (i = 0; i < NOOF_SETRATE_URBS; ++i) { 660 if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) { 661 err = -ENOMEM; 662 goto cleanup; 663 } 664 ((char*)(usbdata + i))[0] = ra[i].c1; 665 ((char*)(usbdata + i))[1] = ra[i].c2; 666 usb_fill_bulk_urb(us->urb[i], usx2y->dev, usb_sndbulkpipe(usx2y->dev, 4), 667 usbdata + i, 2, i_usx2y_04int, usx2y); 668 } 669 err = usb_urb_ep_type_check(us->urb[0]); 670 if (err < 0) 671 goto cleanup; 672 us->submitted = 0; 673 us->len = NOOF_SETRATE_URBS; 674 usx2y->us04 = us; 675 wait_event_timeout(usx2y->in04_wait_queue, 0 == us->len, HZ); 676 usx2y->us04 = NULL; 677 if (us->len) 678 err = -ENODEV; 679 cleanup: 680 if (us) { 681 us->submitted = 2*NOOF_SETRATE_URBS; 682 for (i = 0; i < NOOF_SETRATE_URBS; ++i) { 683 struct urb *urb = us->urb[i]; 684 if (!urb) 685 continue; 686 if (urb->status) { 687 if (!err) 688 err = -ENODEV; 689 usb_kill_urb(urb); 690 } 691 usb_free_urb(urb); 692 } 693 usx2y->us04 = NULL; 694 kfree(usbdata); 695 kfree(us); 696 if (!err) 697 usx2y->rate = rate; 698 } 699 } 700 701 return err; 702} 703 704 705static int usx2y_format_set(struct usx2ydev *usx2y, snd_pcm_format_t format) 706{ 707 int alternate, err; 708 struct list_head* p; 709 if (format == SNDRV_PCM_FORMAT_S24_3LE) { 710 alternate = 2; 711 usx2y->stride = 6; 712 } else { 713 alternate = 1; 714 usx2y->stride = 4; 715 } 716 list_for_each(p, &usx2y->midi_list) { 717 snd_usbmidi_input_stop(p); 718 } 719 usb_kill_urb(usx2y->in04_urb); 720 if ((err = usb_set_interface(usx2y->dev, 0, alternate))) { 721 snd_printk(KERN_ERR "usb_set_interface error \n"); 722 return err; 723 } 724 usx2y->in04_urb->dev = usx2y->dev; 725 err = usb_submit_urb(usx2y->in04_urb, GFP_KERNEL); 726 list_for_each(p, &usx2y->midi_list) { 727 snd_usbmidi_input_start(p); 728 } 729 usx2y->format = format; 730 usx2y->rate = 0; 731 return err; 732} 733 734 735static int snd_usx2y_pcm_hw_params(struct snd_pcm_substream *substream, 736 struct snd_pcm_hw_params *hw_params) 737{ 738 int err = 0; 739 unsigned int rate = params_rate(hw_params); 740 snd_pcm_format_t format = params_format(hw_params); 741 struct snd_card *card = substream->pstr->pcm->card; 742 struct usx2ydev *dev = usx2y(card); 743 int i; 744 745 mutex_lock(&usx2y(card)->pcm_mutex); 746 snd_printdd("snd_usx2y_hw_params(%p, %p)\n", substream, hw_params); 747 /* all pcm substreams off one usx2y have to operate at the same 748 * rate & format 749 */ 750 for (i = 0; i < dev->pcm_devs * 2; i++) { 751 struct snd_usx2y_substream *subs = dev->subs[i]; 752 struct snd_pcm_substream *test_substream; 753 754 if (!subs) 755 continue; 756 test_substream = subs->pcm_substream; 757 if (!test_substream || test_substream == substream || 758 !test_substream->runtime) 759 continue; 760 if ((test_substream->runtime->format && 761 test_substream->runtime->format != format) || 762 (test_substream->runtime->rate && 763 test_substream->runtime->rate != rate)) { 764 err = -EINVAL; 765 goto error; 766 } 767 } 768 769 error: 770 mutex_unlock(&usx2y(card)->pcm_mutex); 771 return err; 772} 773 774/* 775 * free the buffer 776 */ 777static int snd_usx2y_pcm_hw_free(struct snd_pcm_substream *substream) 778{ 779 struct snd_pcm_runtime *runtime = substream->runtime; 780 struct snd_usx2y_substream *subs = runtime->private_data; 781 mutex_lock(&subs->usx2y->pcm_mutex); 782 snd_printdd("snd_usx2y_hw_free(%p)\n", substream); 783 784 if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) { 785 struct snd_usx2y_substream *cap_subs = subs->usx2y->subs[SNDRV_PCM_STREAM_CAPTURE]; 786 atomic_set(&subs->state, STATE_STOPPED); 787 usx2y_urbs_release(subs); 788 if (!cap_subs->pcm_substream || 789 !cap_subs->pcm_substream->runtime || 790 !cap_subs->pcm_substream->runtime->status || 791 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) { 792 atomic_set(&cap_subs->state, STATE_STOPPED); 793 usx2y_urbs_release(cap_subs); 794 } 795 } else { 796 struct snd_usx2y_substream *playback_subs = subs->usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK]; 797 if (atomic_read(&playback_subs->state) < STATE_PREPARED) { 798 atomic_set(&subs->state, STATE_STOPPED); 799 usx2y_urbs_release(subs); 800 } 801 } 802 mutex_unlock(&subs->usx2y->pcm_mutex); 803 return 0; 804} 805/* 806 * prepare callback 807 * 808 * set format and initialize urbs 809 */ 810static int snd_usx2y_pcm_prepare(struct snd_pcm_substream *substream) 811{ 812 struct snd_pcm_runtime *runtime = substream->runtime; 813 struct snd_usx2y_substream *subs = runtime->private_data; 814 struct usx2ydev *usx2y = subs->usx2y; 815 struct snd_usx2y_substream *capsubs = subs->usx2y->subs[SNDRV_PCM_STREAM_CAPTURE]; 816 int err = 0; 817 snd_printdd("snd_usx2y_pcm_prepare(%p)\n", substream); 818 819 mutex_lock(&usx2y->pcm_mutex); 820 usx2y_subs_prepare(subs); 821// Start hardware streams 822// SyncStream first.... 823 if (atomic_read(&capsubs->state) < STATE_PREPARED) { 824 if (usx2y->format != runtime->format) 825 if ((err = usx2y_format_set(usx2y, runtime->format)) < 0) 826 goto up_prepare_mutex; 827 if (usx2y->rate != runtime->rate) 828 if ((err = usx2y_rate_set(usx2y, runtime->rate)) < 0) 829 goto up_prepare_mutex; 830 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe"); 831 if (0 > (err = usx2y_urbs_start(capsubs))) 832 goto up_prepare_mutex; 833 } 834 835 if (subs != capsubs && atomic_read(&subs->state) < STATE_PREPARED) 836 err = usx2y_urbs_start(subs); 837 838 up_prepare_mutex: 839 mutex_unlock(&usx2y->pcm_mutex); 840 return err; 841} 842 843static const struct snd_pcm_hardware snd_usx2y_2c = 844{ 845 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 846 SNDRV_PCM_INFO_BLOCK_TRANSFER | 847 SNDRV_PCM_INFO_MMAP_VALID | 848 SNDRV_PCM_INFO_BATCH), 849 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE, 850 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000, 851 .rate_min = 44100, 852 .rate_max = 48000, 853 .channels_min = 2, 854 .channels_max = 2, 855 .buffer_bytes_max = (2*128*1024), 856 .period_bytes_min = 64, 857 .period_bytes_max = (128*1024), 858 .periods_min = 2, 859 .periods_max = 1024, 860 .fifo_size = 0 861}; 862 863 864 865static int snd_usx2y_pcm_open(struct snd_pcm_substream *substream) 866{ 867 struct snd_usx2y_substream *subs = ((struct snd_usx2y_substream **) 868 snd_pcm_substream_chip(substream))[substream->stream]; 869 struct snd_pcm_runtime *runtime = substream->runtime; 870 871 if (subs->usx2y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS) 872 return -EBUSY; 873 874 runtime->hw = snd_usx2y_2c; 875 runtime->private_data = subs; 876 subs->pcm_substream = substream; 877 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000); 878 return 0; 879} 880 881 882 883static int snd_usx2y_pcm_close(struct snd_pcm_substream *substream) 884{ 885 struct snd_pcm_runtime *runtime = substream->runtime; 886 struct snd_usx2y_substream *subs = runtime->private_data; 887 888 subs->pcm_substream = NULL; 889 890 return 0; 891} 892 893 894static const struct snd_pcm_ops snd_usx2y_pcm_ops = 895{ 896 .open = snd_usx2y_pcm_open, 897 .close = snd_usx2y_pcm_close, 898 .hw_params = snd_usx2y_pcm_hw_params, 899 .hw_free = snd_usx2y_pcm_hw_free, 900 .prepare = snd_usx2y_pcm_prepare, 901 .trigger = snd_usx2y_pcm_trigger, 902 .pointer = snd_usx2y_pcm_pointer, 903}; 904 905 906/* 907 * free a usb stream instance 908 */ 909static void usx2y_audio_stream_free(struct snd_usx2y_substream **usx2y_substream) 910{ 911 int stream; 912 913 for_each_pcm_streams(stream) { 914 kfree(usx2y_substream[stream]); 915 usx2y_substream[stream] = NULL; 916 } 917} 918 919static void snd_usx2y_pcm_private_free(struct snd_pcm *pcm) 920{ 921 struct snd_usx2y_substream **usx2y_stream = pcm->private_data; 922 if (usx2y_stream) 923 usx2y_audio_stream_free(usx2y_stream); 924} 925 926static int usx2y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint) 927{ 928 struct snd_pcm *pcm; 929 int err, i; 930 struct snd_usx2y_substream **usx2y_substream = 931 usx2y(card)->subs + 2 * usx2y(card)->pcm_devs; 932 933 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 934 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) { 935 usx2y_substream[i] = kzalloc(sizeof(struct snd_usx2y_substream), GFP_KERNEL); 936 if (!usx2y_substream[i]) 937 return -ENOMEM; 938 939 usx2y_substream[i]->usx2y = usx2y(card); 940 } 941 942 if (playback_endpoint) 943 usx2y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint; 944 usx2y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint; 945 946 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usx2y(card)->pcm_devs, 947 playback_endpoint ? 1 : 0, 1, 948 &pcm); 949 if (err < 0) { 950 usx2y_audio_stream_free(usx2y_substream); 951 return err; 952 } 953 954 if (playback_endpoint) 955 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usx2y_pcm_ops); 956 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usx2y_pcm_ops); 957 958 pcm->private_data = usx2y_substream; 959 pcm->private_free = snd_usx2y_pcm_private_free; 960 pcm->info_flags = 0; 961 962 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usx2y(card)->pcm_devs); 963 964 if (playback_endpoint) { 965 snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream, 966 SNDRV_DMA_TYPE_CONTINUOUS, 967 NULL, 968 64*1024, 128*1024); 969 } 970 971 snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream, 972 SNDRV_DMA_TYPE_CONTINUOUS, 973 NULL, 974 64*1024, 128*1024); 975 usx2y(card)->pcm_devs++; 976 977 return 0; 978} 979 980/* 981 * create a chip instance and set its names. 982 */ 983int usx2y_audio_create(struct snd_card *card) 984{ 985 int err = 0; 986 987 INIT_LIST_HEAD(&usx2y(card)->pcm_list); 988 989 if (0 > (err = usx2y_audio_stream_new(card, 0xA, 0x8))) 990 return err; 991 if (le16_to_cpu(usx2y(card)->dev->descriptor.idProduct) == USB_ID_US428) 992 if (0 > (err = usx2y_audio_stream_new(card, 0, 0xA))) 993 return err; 994 if (le16_to_cpu(usx2y(card)->dev->descriptor.idProduct) != USB_ID_US122) 995 err = usx2y_rate_set(usx2y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122. 996 return err; 997} 998