1 /* 2 * US-X2Y AUDIO 3 * Copyright (c) 2002-2004 by Karsten Wiese 4 * 5 * based on 6 * 7 * (Tentative) USB Audio Driver for ALSA 8 * 9 * Main and PCM part 10 * 11 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> 12 * 13 * Many codes borrowed from audio.c by 14 * Alan Cox (alan@lxorguk.ukuu.org.uk) 15 * Thomas Sailer (sailer@ife.ee.ethz.ch) 16 * 17 * 18 * This program is free software; you can redistribute it and/or modify 19 * it under the terms of the GNU General Public License as published by 20 * the Free Software Foundation; either version 2 of the License, or 21 * (at your option) any later version. 22 * 23 * This program is distributed in the hope that it will be useful, 24 * but WITHOUT ANY WARRANTY; without even the implied warranty of 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 26 * GNU General Public License for more details. 27 * 28 * You should have received a copy of the GNU General Public License 29 * along with this program; if not, write to the Free Software 30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 31 */ 32 33 34 #include <linux/interrupt.h> 35 #include <linux/slab.h> 36 #include <linux/usb.h> 37 #include <linux/moduleparam.h> 38 #include <sound/core.h> 39 #include <sound/info.h> 40 #include <sound/pcm.h> 41 #include <sound/pcm_params.h> 42 #include "usx2y.h" 43 #include "usbusx2y.h" 44 45 #define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb. 46 1 to 4 have been tested ok on uhci. 47 To use 3 on ohci, you'd need a patch: 48 look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on 49 "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425" 50 . 51 1, 2 and 4 work out of the box on ohci, if I recall correctly. 52 Bigger is safer operation, 53 smaller gives lower latencies. 54 */ 55 #define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter 56 nrpacks set to 1, you might as well comment 57 this #define out, and thereby produce smaller, faster code. 58 You'd also set USX2Y_NRPACKS to 1 then. 59 */ 60 61 #ifdef USX2Y_NRPACKS_VARIABLE 62 static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */ 63 #define nr_of_packs() nrpacks 64 module_param(nrpacks, int, 0444); 65 MODULE_PARM_DESC(nrpacks, "Number of packets per URB."); 66 #else 67 #define nr_of_packs() USX2Y_NRPACKS 68 #endif 69 70 71 static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs) 72 { 73 struct urb *urb = subs->completed_urb; 74 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 75 unsigned char *cp; 76 int i, len, lens = 0, hwptr_done = subs->hwptr_done; 77 struct usX2Ydev *usX2Y = subs->usX2Y; 78 79 for (i = 0; i < nr_of_packs(); i++) { 80 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset; 81 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */ 82 snd_printk(KERN_ERR "active frame status %i. " 83 "Most probably some hardware problem.\n", 84 urb->iso_frame_desc[i].status); 85 return urb->iso_frame_desc[i].status; 86 } 87 len = urb->iso_frame_desc[i].actual_length / usX2Y->stride; 88 if (! len) { 89 snd_printd("0 == len ERROR!\n"); 90 continue; 91 } 92 93 /* copy a data chunk */ 94 if ((hwptr_done + len) > runtime->buffer_size) { 95 int cnt = runtime->buffer_size - hwptr_done; 96 int blen = cnt * usX2Y->stride; 97 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen); 98 memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen); 99 } else { 100 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, 101 len * usX2Y->stride); 102 } 103 lens += len; 104 if ((hwptr_done += len) >= runtime->buffer_size) 105 hwptr_done -= runtime->buffer_size; 106 } 107 108 subs->hwptr_done = hwptr_done; 109 subs->transfer_done += lens; 110 /* update the pointer, call callback if necessary */ 111 if (subs->transfer_done >= runtime->period_size) { 112 subs->transfer_done -= runtime->period_size; 113 snd_pcm_period_elapsed(subs->pcm_substream); 114 } 115 return 0; 116 } 117 /* 118 * prepare urb for playback data pipe 119 * 120 * we copy the data directly from the pcm buffer. 121 * the current position to be copied is held in hwptr field. 122 * since a urb can handle only a single linear buffer, if the total 123 * transferred area overflows the buffer boundary, we cannot send 124 * it directly from the buffer. thus the data is once copied to 125 * a temporary buffer and urb points to that. 126 */ 127 static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs, 128 struct urb *cap_urb, 129 struct urb *urb) 130 { 131 int count, counts, pack; 132 struct usX2Ydev *usX2Y = subs->usX2Y; 133 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 134 135 count = 0; 136 for (pack = 0; pack < nr_of_packs(); pack++) { 137 /* calculate the size of a packet */ 138 counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride; 139 count += counts; 140 if (counts < 43 || counts > 50) { 141 snd_printk(KERN_ERR "should not be here with counts=%i\n", counts); 142 return -EPIPE; 143 } 144 /* set up descriptor */ 145 urb->iso_frame_desc[pack].offset = pack ? 146 urb->iso_frame_desc[pack - 1].offset + 147 urb->iso_frame_desc[pack - 1].length : 148 0; 149 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length; 150 } 151 if (atomic_read(&subs->state) >= state_PRERUNNING) 152 if (subs->hwptr + count > runtime->buffer_size) { 153 /* err, the transferred area goes over buffer boundary. 154 * copy the data to the temp buffer. 155 */ 156 int len; 157 len = runtime->buffer_size - subs->hwptr; 158 urb->transfer_buffer = subs->tmpbuf; 159 memcpy(subs->tmpbuf, runtime->dma_area + 160 subs->hwptr * usX2Y->stride, len * usX2Y->stride); 161 memcpy(subs->tmpbuf + len * usX2Y->stride, 162 runtime->dma_area, (count - len) * usX2Y->stride); 163 subs->hwptr += count; 164 subs->hwptr -= runtime->buffer_size; 165 } else { 166 /* set the buffer pointer */ 167 urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride; 168 if ((subs->hwptr += count) >= runtime->buffer_size) 169 subs->hwptr -= runtime->buffer_size; 170 } 171 else 172 urb->transfer_buffer = subs->tmpbuf; 173 urb->transfer_buffer_length = count * usX2Y->stride; 174 return 0; 175 } 176 177 /* 178 * process after playback data complete 179 * 180 * update the current position and call callback if a period is processed. 181 */ 182 static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb) 183 { 184 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 185 int len = urb->actual_length / subs->usX2Y->stride; 186 187 subs->transfer_done += len; 188 subs->hwptr_done += len; 189 if (subs->hwptr_done >= runtime->buffer_size) 190 subs->hwptr_done -= runtime->buffer_size; 191 if (subs->transfer_done >= runtime->period_size) { 192 subs->transfer_done -= runtime->period_size; 193 snd_pcm_period_elapsed(subs->pcm_substream); 194 } 195 } 196 197 static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame) 198 { 199 int err; 200 if (!urb) 201 return -ENODEV; 202 urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks 203 urb->hcpriv = NULL; 204 urb->dev = subs->usX2Y->dev; /* we need to set this at each time */ 205 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { 206 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err); 207 return err; 208 } 209 return 0; 210 } 211 212 static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs, 213 struct snd_usX2Y_substream *playbacksubs, 214 int frame) 215 { 216 int err, state; 217 struct urb *urb = playbacksubs->completed_urb; 218 219 state = atomic_read(&playbacksubs->state); 220 if (NULL != urb) { 221 if (state == state_RUNNING) 222 usX2Y_urb_play_retire(playbacksubs, urb); 223 else if (state >= state_PRERUNNING) 224 atomic_inc(&playbacksubs->state); 225 } else { 226 switch (state) { 227 case state_STARTING1: 228 urb = playbacksubs->urb[0]; 229 atomic_inc(&playbacksubs->state); 230 break; 231 case state_STARTING2: 232 urb = playbacksubs->urb[1]; 233 atomic_inc(&playbacksubs->state); 234 break; 235 } 236 } 237 if (urb) { 238 if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) || 239 (err = usX2Y_urb_submit(playbacksubs, urb, frame))) { 240 return err; 241 } 242 } 243 244 playbacksubs->completed_urb = NULL; 245 246 state = atomic_read(&capsubs->state); 247 if (state >= state_PREPARED) { 248 if (state == state_RUNNING) { 249 if ((err = usX2Y_urb_capt_retire(capsubs))) 250 return err; 251 } else if (state >= state_PRERUNNING) 252 atomic_inc(&capsubs->state); 253 if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame))) 254 return err; 255 } 256 capsubs->completed_urb = NULL; 257 return 0; 258 } 259 260 261 static void usX2Y_clients_stop(struct usX2Ydev *usX2Y) 262 { 263 int s, u; 264 265 for (s = 0; s < 4; s++) { 266 struct snd_usX2Y_substream *subs = usX2Y->subs[s]; 267 if (subs) { 268 snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state)); 269 atomic_set(&subs->state, state_STOPPED); 270 } 271 } 272 for (s = 0; s < 4; s++) { 273 struct snd_usX2Y_substream *subs = usX2Y->subs[s]; 274 if (subs) { 275 if (atomic_read(&subs->state) >= state_PRERUNNING) 276 snd_pcm_stop_xrun(subs->pcm_substream); 277 for (u = 0; u < NRURBS; u++) { 278 struct urb *urb = subs->urb[u]; 279 if (NULL != urb) 280 snd_printdd("%i status=%i start_frame=%i\n", 281 u, urb->status, urb->start_frame); 282 } 283 } 284 } 285 usX2Y->prepare_subs = NULL; 286 wake_up(&usX2Y->prepare_wait_queue); 287 } 288 289 static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y, 290 struct snd_usX2Y_substream *subs, struct urb *urb) 291 { 292 snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status); 293 urb->status = 0; 294 usX2Y_clients_stop(usX2Y); 295 } 296 297 static void i_usX2Y_urb_complete(struct urb *urb) 298 { 299 struct snd_usX2Y_substream *subs = urb->context; 300 struct usX2Ydev *usX2Y = subs->usX2Y; 301 302 if (unlikely(atomic_read(&subs->state) < state_PREPARED)) { 303 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n", 304 usb_get_current_frame_number(usX2Y->dev), 305 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", 306 urb->status, urb->start_frame); 307 return; 308 } 309 if (unlikely(urb->status)) { 310 usX2Y_error_urb_status(usX2Y, subs, urb); 311 return; 312 } 313 314 subs->completed_urb = urb; 315 316 { 317 struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE], 318 *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; 319 if (capsubs->completed_urb && 320 atomic_read(&capsubs->state) >= state_PREPARED && 321 (playbacksubs->completed_urb || 322 atomic_read(&playbacksubs->state) < state_PREPARED)) { 323 if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame)) 324 usX2Y->wait_iso_frame += nr_of_packs(); 325 else { 326 snd_printdd("\n"); 327 usX2Y_clients_stop(usX2Y); 328 } 329 } 330 } 331 } 332 333 static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y, 334 void (*complete)(struct urb *)) 335 { 336 int s, u; 337 for (s = 0; s < 4; s++) { 338 struct snd_usX2Y_substream *subs = usX2Y->subs[s]; 339 if (NULL != subs) 340 for (u = 0; u < NRURBS; u++) { 341 struct urb * urb = subs->urb[u]; 342 if (NULL != urb) 343 urb->complete = complete; 344 } 345 } 346 } 347 348 static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y) 349 { 350 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete); 351 usX2Y->prepare_subs = NULL; 352 } 353 354 static void i_usX2Y_subs_startup(struct urb *urb) 355 { 356 struct snd_usX2Y_substream *subs = urb->context; 357 struct usX2Ydev *usX2Y = subs->usX2Y; 358 struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs; 359 if (NULL != prepare_subs) 360 if (urb->start_frame == prepare_subs->urb[0]->start_frame) { 361 usX2Y_subs_startup_finish(usX2Y); 362 atomic_inc(&prepare_subs->state); 363 wake_up(&usX2Y->prepare_wait_queue); 364 } 365 366 i_usX2Y_urb_complete(urb); 367 } 368 369 static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs) 370 { 371 snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n", 372 subs, subs->endpoint, subs->urb[0], subs->urb[1]); 373 /* reset the pointer */ 374 subs->hwptr = 0; 375 subs->hwptr_done = 0; 376 subs->transfer_done = 0; 377 } 378 379 380 static void usX2Y_urb_release(struct urb **urb, int free_tb) 381 { 382 if (*urb) { 383 usb_kill_urb(*urb); 384 if (free_tb) 385 kfree((*urb)->transfer_buffer); 386 usb_free_urb(*urb); 387 *urb = NULL; 388 } 389 } 390 /* 391 * release a substreams urbs 392 */ 393 static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs) 394 { 395 int i; 396 snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint); 397 for (i = 0; i < NRURBS; i++) 398 usX2Y_urb_release(subs->urb + i, 399 subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]); 400 401 kfree(subs->tmpbuf); 402 subs->tmpbuf = NULL; 403 } 404 /* 405 * initialize a substream's urbs 406 */ 407 static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs) 408 { 409 int i; 410 unsigned int pipe; 411 int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; 412 struct usb_device *dev = subs->usX2Y->dev; 413 414 pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) : 415 usb_rcvisocpipe(dev, subs->endpoint); 416 subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback); 417 if (!subs->maxpacksize) 418 return -EINVAL; 419 420 if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */ 421 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL); 422 if (!subs->tmpbuf) 423 return -ENOMEM; 424 } 425 /* allocate and initialize data urbs */ 426 for (i = 0; i < NRURBS; i++) { 427 struct urb **purb = subs->urb + i; 428 if (*purb) { 429 usb_kill_urb(*purb); 430 continue; 431 } 432 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL); 433 if (NULL == *purb) { 434 usX2Y_urbs_release(subs); 435 return -ENOMEM; 436 } 437 if (!is_playback && !(*purb)->transfer_buffer) { 438 /* allocate a capture buffer per urb */ 439 (*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL); 440 if (NULL == (*purb)->transfer_buffer) { 441 usX2Y_urbs_release(subs); 442 return -ENOMEM; 443 } 444 } 445 (*purb)->dev = dev; 446 (*purb)->pipe = pipe; 447 (*purb)->number_of_packets = nr_of_packs(); 448 (*purb)->context = subs; 449 (*purb)->interval = 1; 450 (*purb)->complete = i_usX2Y_subs_startup; 451 } 452 return 0; 453 } 454 455 static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs) 456 { 457 struct usX2Ydev *usX2Y = subs->usX2Y; 458 usX2Y->prepare_subs = subs; 459 subs->urb[0]->start_frame = -1; 460 wmb(); 461 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup); 462 } 463 464 static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs) 465 { 466 int i, err; 467 struct usX2Ydev *usX2Y = subs->usX2Y; 468 469 if ((err = usX2Y_urbs_allocate(subs)) < 0) 470 return err; 471 subs->completed_urb = NULL; 472 for (i = 0; i < 4; i++) { 473 struct snd_usX2Y_substream *subs = usX2Y->subs[i]; 474 if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED) 475 goto start; 476 } 477 478 start: 479 usX2Y_subs_startup(subs); 480 for (i = 0; i < NRURBS; i++) { 481 struct urb *urb = subs->urb[i]; 482 if (usb_pipein(urb->pipe)) { 483 unsigned long pack; 484 if (0 == i) 485 atomic_set(&subs->state, state_STARTING3); 486 urb->dev = usX2Y->dev; 487 for (pack = 0; pack < nr_of_packs(); pack++) { 488 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack; 489 urb->iso_frame_desc[pack].length = subs->maxpacksize; 490 } 491 urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); 492 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { 493 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err); 494 err = -EPIPE; 495 goto cleanup; 496 } else 497 if (i == 0) 498 usX2Y->wait_iso_frame = urb->start_frame; 499 urb->transfer_flags = 0; 500 } else { 501 atomic_set(&subs->state, state_STARTING1); 502 break; 503 } 504 } 505 err = 0; 506 wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs); 507 if (atomic_read(&subs->state) != state_PREPARED) 508 err = -EPIPE; 509 510 cleanup: 511 if (err) { 512 usX2Y_subs_startup_finish(usX2Y); 513 usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything 514 } 515 return err; 516 } 517 518 /* 519 * return the current pcm pointer. just return the hwptr_done value. 520 */ 521 static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream) 522 { 523 struct snd_usX2Y_substream *subs = substream->runtime->private_data; 524 return subs->hwptr_done; 525 } 526 /* 527 * start/stop substream 528 */ 529 static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 530 { 531 struct snd_usX2Y_substream *subs = substream->runtime->private_data; 532 533 switch (cmd) { 534 case SNDRV_PCM_TRIGGER_START: 535 snd_printdd("snd_usX2Y_pcm_trigger(START)\n"); 536 if (atomic_read(&subs->state) == state_PREPARED && 537 atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) { 538 atomic_set(&subs->state, state_PRERUNNING); 539 } else { 540 snd_printdd("\n"); 541 return -EPIPE; 542 } 543 break; 544 case SNDRV_PCM_TRIGGER_STOP: 545 snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n"); 546 if (atomic_read(&subs->state) >= state_PRERUNNING) 547 atomic_set(&subs->state, state_PREPARED); 548 break; 549 default: 550 return -EINVAL; 551 } 552 return 0; 553 } 554 555 556 /* 557 * allocate a buffer, setup samplerate 558 * 559 * so far we use a physically linear buffer although packetize transfer 560 * doesn't need a continuous area. 561 * if sg buffer is supported on the later version of alsa, we'll follow 562 * that. 563 */ 564 static struct s_c2 565 { 566 char c1, c2; 567 } 568 SetRate44100[] = 569 { 570 { 0x14, 0x08}, // this line sets 44100, well actually a little less 571 { 0x18, 0x40}, // only tascam / frontier design knows the further lines ....... 572 { 0x18, 0x42}, 573 { 0x18, 0x45}, 574 { 0x18, 0x46}, 575 { 0x18, 0x48}, 576 { 0x18, 0x4A}, 577 { 0x18, 0x4C}, 578 { 0x18, 0x4E}, 579 { 0x18, 0x50}, 580 { 0x18, 0x52}, 581 { 0x18, 0x54}, 582 { 0x18, 0x56}, 583 { 0x18, 0x58}, 584 { 0x18, 0x5A}, 585 { 0x18, 0x5C}, 586 { 0x18, 0x5E}, 587 { 0x18, 0x60}, 588 { 0x18, 0x62}, 589 { 0x18, 0x64}, 590 { 0x18, 0x66}, 591 { 0x18, 0x68}, 592 { 0x18, 0x6A}, 593 { 0x18, 0x6C}, 594 { 0x18, 0x6E}, 595 { 0x18, 0x70}, 596 { 0x18, 0x72}, 597 { 0x18, 0x74}, 598 { 0x18, 0x76}, 599 { 0x18, 0x78}, 600 { 0x18, 0x7A}, 601 { 0x18, 0x7C}, 602 { 0x18, 0x7E} 603 }; 604 static struct s_c2 SetRate48000[] = 605 { 606 { 0x14, 0x09}, // this line sets 48000, well actually a little less 607 { 0x18, 0x40}, // only tascam / frontier design knows the further lines ....... 608 { 0x18, 0x42}, 609 { 0x18, 0x45}, 610 { 0x18, 0x46}, 611 { 0x18, 0x48}, 612 { 0x18, 0x4A}, 613 { 0x18, 0x4C}, 614 { 0x18, 0x4E}, 615 { 0x18, 0x50}, 616 { 0x18, 0x52}, 617 { 0x18, 0x54}, 618 { 0x18, 0x56}, 619 { 0x18, 0x58}, 620 { 0x18, 0x5A}, 621 { 0x18, 0x5C}, 622 { 0x18, 0x5E}, 623 { 0x18, 0x60}, 624 { 0x18, 0x62}, 625 { 0x18, 0x64}, 626 { 0x18, 0x66}, 627 { 0x18, 0x68}, 628 { 0x18, 0x6A}, 629 { 0x18, 0x6C}, 630 { 0x18, 0x6E}, 631 { 0x18, 0x70}, 632 { 0x18, 0x73}, 633 { 0x18, 0x74}, 634 { 0x18, 0x76}, 635 { 0x18, 0x78}, 636 { 0x18, 0x7A}, 637 { 0x18, 0x7C}, 638 { 0x18, 0x7E} 639 }; 640 #define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000) 641 642 static void i_usX2Y_04Int(struct urb *urb) 643 { 644 struct usX2Ydev *usX2Y = urb->context; 645 646 if (urb->status) 647 snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status); 648 if (0 == --usX2Y->US04->len) 649 wake_up(&usX2Y->In04WaitQueue); 650 } 651 652 static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate) 653 { 654 int err = 0, i; 655 struct snd_usX2Y_urbSeq *us = NULL; 656 int *usbdata = NULL; 657 struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100; 658 659 if (usX2Y->rate != rate) { 660 us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL); 661 if (NULL == us) { 662 err = -ENOMEM; 663 goto cleanup; 664 } 665 usbdata = kmalloc(sizeof(int) * NOOF_SETRATE_URBS, GFP_KERNEL); 666 if (NULL == usbdata) { 667 err = -ENOMEM; 668 goto cleanup; 669 } 670 for (i = 0; i < NOOF_SETRATE_URBS; ++i) { 671 if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) { 672 err = -ENOMEM; 673 goto cleanup; 674 } 675 ((char*)(usbdata + i))[0] = ra[i].c1; 676 ((char*)(usbdata + i))[1] = ra[i].c2; 677 usb_fill_bulk_urb(us->urb[i], usX2Y->dev, usb_sndbulkpipe(usX2Y->dev, 4), 678 usbdata + i, 2, i_usX2Y_04Int, usX2Y); 679 } 680 err = usb_urb_ep_type_check(us->urb[0]); 681 if (err < 0) 682 goto cleanup; 683 us->submitted = 0; 684 us->len = NOOF_SETRATE_URBS; 685 usX2Y->US04 = us; 686 wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ); 687 usX2Y->US04 = NULL; 688 if (us->len) 689 err = -ENODEV; 690 cleanup: 691 if (us) { 692 us->submitted = 2*NOOF_SETRATE_URBS; 693 for (i = 0; i < NOOF_SETRATE_URBS; ++i) { 694 struct urb *urb = us->urb[i]; 695 if (urb->status) { 696 if (!err) 697 err = -ENODEV; 698 usb_kill_urb(urb); 699 } 700 usb_free_urb(urb); 701 } 702 usX2Y->US04 = NULL; 703 kfree(usbdata); 704 kfree(us); 705 if (!err) 706 usX2Y->rate = rate; 707 } 708 } 709 710 return err; 711 } 712 713 714 static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format) 715 { 716 int alternate, err; 717 struct list_head* p; 718 if (format == SNDRV_PCM_FORMAT_S24_3LE) { 719 alternate = 2; 720 usX2Y->stride = 6; 721 } else { 722 alternate = 1; 723 usX2Y->stride = 4; 724 } 725 list_for_each(p, &usX2Y->midi_list) { 726 snd_usbmidi_input_stop(p); 727 } 728 usb_kill_urb(usX2Y->In04urb); 729 if ((err = usb_set_interface(usX2Y->dev, 0, alternate))) { 730 snd_printk(KERN_ERR "usb_set_interface error \n"); 731 return err; 732 } 733 usX2Y->In04urb->dev = usX2Y->dev; 734 err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL); 735 list_for_each(p, &usX2Y->midi_list) { 736 snd_usbmidi_input_start(p); 737 } 738 usX2Y->format = format; 739 usX2Y->rate = 0; 740 return err; 741 } 742 743 744 static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream, 745 struct snd_pcm_hw_params *hw_params) 746 { 747 int err = 0; 748 unsigned int rate = params_rate(hw_params); 749 snd_pcm_format_t format = params_format(hw_params); 750 struct snd_card *card = substream->pstr->pcm->card; 751 struct usX2Ydev *dev = usX2Y(card); 752 int i; 753 754 mutex_lock(&usX2Y(card)->pcm_mutex); 755 snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params); 756 /* all pcm substreams off one usX2Y have to operate at the same 757 * rate & format 758 */ 759 for (i = 0; i < dev->pcm_devs * 2; i++) { 760 struct snd_usX2Y_substream *subs = dev->subs[i]; 761 struct snd_pcm_substream *test_substream; 762 763 if (!subs) 764 continue; 765 test_substream = subs->pcm_substream; 766 if (!test_substream || test_substream == substream || 767 !test_substream->runtime) 768 continue; 769 if ((test_substream->runtime->format && 770 test_substream->runtime->format != format) || 771 (test_substream->runtime->rate && 772 test_substream->runtime->rate != rate)) { 773 err = -EINVAL; 774 goto error; 775 } 776 } 777 778 err = snd_pcm_lib_malloc_pages(substream, 779 params_buffer_bytes(hw_params)); 780 if (err < 0) { 781 snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n", 782 substream, params_buffer_bytes(hw_params), err); 783 goto error; 784 } 785 786 error: 787 mutex_unlock(&usX2Y(card)->pcm_mutex); 788 return err; 789 } 790 791 /* 792 * free the buffer 793 */ 794 static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream) 795 { 796 struct snd_pcm_runtime *runtime = substream->runtime; 797 struct snd_usX2Y_substream *subs = runtime->private_data; 798 mutex_lock(&subs->usX2Y->pcm_mutex); 799 snd_printdd("snd_usX2Y_hw_free(%p)\n", substream); 800 801 if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) { 802 struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; 803 atomic_set(&subs->state, state_STOPPED); 804 usX2Y_urbs_release(subs); 805 if (!cap_subs->pcm_substream || 806 !cap_subs->pcm_substream->runtime || 807 !cap_subs->pcm_substream->runtime->status || 808 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) { 809 atomic_set(&cap_subs->state, state_STOPPED); 810 usX2Y_urbs_release(cap_subs); 811 } 812 } else { 813 struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; 814 if (atomic_read(&playback_subs->state) < state_PREPARED) { 815 atomic_set(&subs->state, state_STOPPED); 816 usX2Y_urbs_release(subs); 817 } 818 } 819 mutex_unlock(&subs->usX2Y->pcm_mutex); 820 return snd_pcm_lib_free_pages(substream); 821 } 822 /* 823 * prepare callback 824 * 825 * set format and initialize urbs 826 */ 827 static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream) 828 { 829 struct snd_pcm_runtime *runtime = substream->runtime; 830 struct snd_usX2Y_substream *subs = runtime->private_data; 831 struct usX2Ydev *usX2Y = subs->usX2Y; 832 struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; 833 int err = 0; 834 snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream); 835 836 mutex_lock(&usX2Y->pcm_mutex); 837 usX2Y_subs_prepare(subs); 838 // Start hardware streams 839 // SyncStream first.... 840 if (atomic_read(&capsubs->state) < state_PREPARED) { 841 if (usX2Y->format != runtime->format) 842 if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0) 843 goto up_prepare_mutex; 844 if (usX2Y->rate != runtime->rate) 845 if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0) 846 goto up_prepare_mutex; 847 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe"); 848 if (0 > (err = usX2Y_urbs_start(capsubs))) 849 goto up_prepare_mutex; 850 } 851 852 if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED) 853 err = usX2Y_urbs_start(subs); 854 855 up_prepare_mutex: 856 mutex_unlock(&usX2Y->pcm_mutex); 857 return err; 858 } 859 860 static struct snd_pcm_hardware snd_usX2Y_2c = 861 { 862 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 863 SNDRV_PCM_INFO_BLOCK_TRANSFER | 864 SNDRV_PCM_INFO_MMAP_VALID | 865 SNDRV_PCM_INFO_BATCH), 866 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE, 867 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000, 868 .rate_min = 44100, 869 .rate_max = 48000, 870 .channels_min = 2, 871 .channels_max = 2, 872 .buffer_bytes_max = (2*128*1024), 873 .period_bytes_min = 64, 874 .period_bytes_max = (128*1024), 875 .periods_min = 2, 876 .periods_max = 1024, 877 .fifo_size = 0 878 }; 879 880 881 882 static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream) 883 { 884 struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **) 885 snd_pcm_substream_chip(substream))[substream->stream]; 886 struct snd_pcm_runtime *runtime = substream->runtime; 887 888 if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS) 889 return -EBUSY; 890 891 runtime->hw = snd_usX2Y_2c; 892 runtime->private_data = subs; 893 subs->pcm_substream = substream; 894 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000); 895 return 0; 896 } 897 898 899 900 static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream) 901 { 902 struct snd_pcm_runtime *runtime = substream->runtime; 903 struct snd_usX2Y_substream *subs = runtime->private_data; 904 905 subs->pcm_substream = NULL; 906 907 return 0; 908 } 909 910 911 static const struct snd_pcm_ops snd_usX2Y_pcm_ops = 912 { 913 .open = snd_usX2Y_pcm_open, 914 .close = snd_usX2Y_pcm_close, 915 .ioctl = snd_pcm_lib_ioctl, 916 .hw_params = snd_usX2Y_pcm_hw_params, 917 .hw_free = snd_usX2Y_pcm_hw_free, 918 .prepare = snd_usX2Y_pcm_prepare, 919 .trigger = snd_usX2Y_pcm_trigger, 920 .pointer = snd_usX2Y_pcm_pointer, 921 }; 922 923 924 /* 925 * free a usb stream instance 926 */ 927 static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream) 928 { 929 kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]); 930 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL; 931 932 kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]); 933 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL; 934 } 935 936 static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm) 937 { 938 struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data; 939 if (usX2Y_stream) 940 usX2Y_audio_stream_free(usX2Y_stream); 941 } 942 943 static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint) 944 { 945 struct snd_pcm *pcm; 946 int err, i; 947 struct snd_usX2Y_substream **usX2Y_substream = 948 usX2Y(card)->subs + 2 * usX2Y(card)->pcm_devs; 949 950 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; 951 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) { 952 usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL); 953 if (!usX2Y_substream[i]) 954 return -ENOMEM; 955 956 usX2Y_substream[i]->usX2Y = usX2Y(card); 957 } 958 959 if (playback_endpoint) 960 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint; 961 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint; 962 963 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->pcm_devs, 964 playback_endpoint ? 1 : 0, 1, 965 &pcm); 966 if (err < 0) { 967 usX2Y_audio_stream_free(usX2Y_substream); 968 return err; 969 } 970 971 if (playback_endpoint) 972 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops); 973 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops); 974 975 pcm->private_data = usX2Y_substream; 976 pcm->private_free = snd_usX2Y_pcm_private_free; 977 pcm->info_flags = 0; 978 979 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->pcm_devs); 980 981 if ((playback_endpoint && 982 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream, 983 SNDRV_DMA_TYPE_CONTINUOUS, 984 snd_dma_continuous_data(GFP_KERNEL), 985 64*1024, 128*1024))) || 986 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream, 987 SNDRV_DMA_TYPE_CONTINUOUS, 988 snd_dma_continuous_data(GFP_KERNEL), 989 64*1024, 128*1024))) { 990 snd_usX2Y_pcm_private_free(pcm); 991 return err; 992 } 993 usX2Y(card)->pcm_devs++; 994 995 return 0; 996 } 997 998 /* 999 * create a chip instance and set its names. 1000 */ 1001 int usX2Y_audio_create(struct snd_card *card) 1002 { 1003 int err = 0; 1004 1005 INIT_LIST_HEAD(&usX2Y(card)->pcm_list); 1006 1007 if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8))) 1008 return err; 1009 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) == USB_ID_US428) 1010 if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA))) 1011 return err; 1012 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) != USB_ID_US122) 1013 err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122. 1014 return err; 1015 } 1016