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 57 static 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 */ 113 static 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 */ 168 static 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 } 182 183 static 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 } 197 198 static 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 } 245 246 247 static 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 } 274 275 static 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 } 282 283 static 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 } 318 319 static 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 } 333 334 static 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 } 339 340 static 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 } 354 355 static 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 } 364 365 366 static 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 */ 379 static 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 */ 393 static 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 } 442 443 static 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 } 451 452 static 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 */ 509 static 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 */ 517 static 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 */ 552 static struct s_c2 553 { 554 char c1, c2; 555 } 556 SetRate44100[] = 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 }; 592 static struct s_c2 SetRate48000[] = 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(SetRate48000) 629 630 static 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->In04WaitQueue); 638 } 639 640 static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate) 641 { 642 int err = 0, i; 643 struct snd_usX2Y_urbSeq *us = NULL; 644 int *usbdata = NULL; 645 struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100; 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->In04WaitQueue, 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->status) { 685 if (!err) 686 err = -ENODEV; 687 usb_kill_urb(urb); 688 } 689 usb_free_urb(urb); 690 } 691 usX2Y->US04 = NULL; 692 kfree(usbdata); 693 kfree(us); 694 if (!err) 695 usX2Y->rate = rate; 696 } 697 } 698 699 return err; 700 } 701 702 703 static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format) 704 { 705 int alternate, err; 706 struct list_head* p; 707 if (format == SNDRV_PCM_FORMAT_S24_3LE) { 708 alternate = 2; 709 usX2Y->stride = 6; 710 } else { 711 alternate = 1; 712 usX2Y->stride = 4; 713 } 714 list_for_each(p, &usX2Y->midi_list) { 715 snd_usbmidi_input_stop(p); 716 } 717 usb_kill_urb(usX2Y->In04urb); 718 if ((err = usb_set_interface(usX2Y->dev, 0, alternate))) { 719 snd_printk(KERN_ERR "usb_set_interface error \n"); 720 return err; 721 } 722 usX2Y->In04urb->dev = usX2Y->dev; 723 err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL); 724 list_for_each(p, &usX2Y->midi_list) { 725 snd_usbmidi_input_start(p); 726 } 727 usX2Y->format = format; 728 usX2Y->rate = 0; 729 return err; 730 } 731 732 733 static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream, 734 struct snd_pcm_hw_params *hw_params) 735 { 736 int err = 0; 737 unsigned int rate = params_rate(hw_params); 738 snd_pcm_format_t format = params_format(hw_params); 739 struct snd_card *card = substream->pstr->pcm->card; 740 struct usX2Ydev *dev = usX2Y(card); 741 int i; 742 743 mutex_lock(&usX2Y(card)->pcm_mutex); 744 snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params); 745 /* all pcm substreams off one usX2Y have to operate at the same 746 * rate & format 747 */ 748 for (i = 0; i < dev->pcm_devs * 2; i++) { 749 struct snd_usX2Y_substream *subs = dev->subs[i]; 750 struct snd_pcm_substream *test_substream; 751 752 if (!subs) 753 continue; 754 test_substream = subs->pcm_substream; 755 if (!test_substream || test_substream == substream || 756 !test_substream->runtime) 757 continue; 758 if ((test_substream->runtime->format && 759 test_substream->runtime->format != format) || 760 (test_substream->runtime->rate && 761 test_substream->runtime->rate != rate)) { 762 err = -EINVAL; 763 goto error; 764 } 765 } 766 767 err = snd_pcm_lib_malloc_pages(substream, 768 params_buffer_bytes(hw_params)); 769 if (err < 0) { 770 snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n", 771 substream, params_buffer_bytes(hw_params), err); 772 goto error; 773 } 774 775 error: 776 mutex_unlock(&usX2Y(card)->pcm_mutex); 777 return err; 778 } 779 780 /* 781 * free the buffer 782 */ 783 static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream) 784 { 785 struct snd_pcm_runtime *runtime = substream->runtime; 786 struct snd_usX2Y_substream *subs = runtime->private_data; 787 mutex_lock(&subs->usX2Y->pcm_mutex); 788 snd_printdd("snd_usX2Y_hw_free(%p)\n", substream); 789 790 if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) { 791 struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; 792 atomic_set(&subs->state, state_STOPPED); 793 usX2Y_urbs_release(subs); 794 if (!cap_subs->pcm_substream || 795 !cap_subs->pcm_substream->runtime || 796 !cap_subs->pcm_substream->runtime->status || 797 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) { 798 atomic_set(&cap_subs->state, state_STOPPED); 799 usX2Y_urbs_release(cap_subs); 800 } 801 } else { 802 struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; 803 if (atomic_read(&playback_subs->state) < state_PREPARED) { 804 atomic_set(&subs->state, state_STOPPED); 805 usX2Y_urbs_release(subs); 806 } 807 } 808 mutex_unlock(&subs->usX2Y->pcm_mutex); 809 return snd_pcm_lib_free_pages(substream); 810 } 811 /* 812 * prepare callback 813 * 814 * set format and initialize urbs 815 */ 816 static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream) 817 { 818 struct snd_pcm_runtime *runtime = substream->runtime; 819 struct snd_usX2Y_substream *subs = runtime->private_data; 820 struct usX2Ydev *usX2Y = subs->usX2Y; 821 struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; 822 int err = 0; 823 snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream); 824 825 mutex_lock(&usX2Y->pcm_mutex); 826 usX2Y_subs_prepare(subs); 827 // Start hardware streams 828 // SyncStream first.... 829 if (atomic_read(&capsubs->state) < state_PREPARED) { 830 if (usX2Y->format != runtime->format) 831 if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0) 832 goto up_prepare_mutex; 833 if (usX2Y->rate != runtime->rate) 834 if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0) 835 goto up_prepare_mutex; 836 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe"); 837 if (0 > (err = usX2Y_urbs_start(capsubs))) 838 goto up_prepare_mutex; 839 } 840 841 if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED) 842 err = usX2Y_urbs_start(subs); 843 844 up_prepare_mutex: 845 mutex_unlock(&usX2Y->pcm_mutex); 846 return err; 847 } 848 849 static struct snd_pcm_hardware snd_usX2Y_2c = 850 { 851 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 852 SNDRV_PCM_INFO_BLOCK_TRANSFER | 853 SNDRV_PCM_INFO_MMAP_VALID | 854 SNDRV_PCM_INFO_BATCH), 855 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE, 856 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000, 857 .rate_min = 44100, 858 .rate_max = 48000, 859 .channels_min = 2, 860 .channels_max = 2, 861 .buffer_bytes_max = (2*128*1024), 862 .period_bytes_min = 64, 863 .period_bytes_max = (128*1024), 864 .periods_min = 2, 865 .periods_max = 1024, 866 .fifo_size = 0 867 }; 868 869 870 871 static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream) 872 { 873 struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **) 874 snd_pcm_substream_chip(substream))[substream->stream]; 875 struct snd_pcm_runtime *runtime = substream->runtime; 876 877 if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS) 878 return -EBUSY; 879 880 runtime->hw = snd_usX2Y_2c; 881 runtime->private_data = subs; 882 subs->pcm_substream = substream; 883 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000); 884 return 0; 885 } 886 887 888 889 static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream) 890 { 891 struct snd_pcm_runtime *runtime = substream->runtime; 892 struct snd_usX2Y_substream *subs = runtime->private_data; 893 894 subs->pcm_substream = NULL; 895 896 return 0; 897 } 898 899 900 static const struct snd_pcm_ops snd_usX2Y_pcm_ops = 901 { 902 .open = snd_usX2Y_pcm_open, 903 .close = snd_usX2Y_pcm_close, 904 .ioctl = snd_pcm_lib_ioctl, 905 .hw_params = snd_usX2Y_pcm_hw_params, 906 .hw_free = snd_usX2Y_pcm_hw_free, 907 .prepare = snd_usX2Y_pcm_prepare, 908 .trigger = snd_usX2Y_pcm_trigger, 909 .pointer = snd_usX2Y_pcm_pointer, 910 }; 911 912 913 /* 914 * free a usb stream instance 915 */ 916 static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream) 917 { 918 kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]); 919 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL; 920 921 kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]); 922 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL; 923 } 924 925 static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm) 926 { 927 struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data; 928 if (usX2Y_stream) 929 usX2Y_audio_stream_free(usX2Y_stream); 930 } 931 932 static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint) 933 { 934 struct snd_pcm *pcm; 935 int err, i; 936 struct snd_usX2Y_substream **usX2Y_substream = 937 usX2Y(card)->subs + 2 * usX2Y(card)->pcm_devs; 938 939 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 940 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) { 941 usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL); 942 if (!usX2Y_substream[i]) 943 return -ENOMEM; 944 945 usX2Y_substream[i]->usX2Y = usX2Y(card); 946 } 947 948 if (playback_endpoint) 949 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint; 950 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint; 951 952 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->pcm_devs, 953 playback_endpoint ? 1 : 0, 1, 954 &pcm); 955 if (err < 0) { 956 usX2Y_audio_stream_free(usX2Y_substream); 957 return err; 958 } 959 960 if (playback_endpoint) 961 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops); 962 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops); 963 964 pcm->private_data = usX2Y_substream; 965 pcm->private_free = snd_usX2Y_pcm_private_free; 966 pcm->info_flags = 0; 967 968 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->pcm_devs); 969 970 if (playback_endpoint) { 971 snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream, 972 SNDRV_DMA_TYPE_CONTINUOUS, 973 snd_dma_continuous_data(GFP_KERNEL), 974 64*1024, 128*1024); 975 } 976 977 snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream, 978 SNDRV_DMA_TYPE_CONTINUOUS, 979 snd_dma_continuous_data(GFP_KERNEL), 980 64*1024, 128*1024); 981 usX2Y(card)->pcm_devs++; 982 983 return 0; 984 } 985 986 /* 987 * create a chip instance and set its names. 988 */ 989 int usX2Y_audio_create(struct snd_card *card) 990 { 991 int err = 0; 992 993 INIT_LIST_HEAD(&usX2Y(card)->pcm_list); 994 995 if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8))) 996 return err; 997 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) == USB_ID_US428) 998 if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA))) 999 return err; 1000 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) != USB_ID_US122) 1001 err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122. 1002 return err; 1003 } 1004