1 /* 2 * Digital Audio (PCM) abstract layer / OSS compatible 3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #if 0 23 #define PLUGIN_DEBUG 24 #endif 25 #if 0 26 #define OSS_DEBUG 27 #endif 28 29 #include <sound/driver.h> 30 #include <linux/init.h> 31 #include <linux/smp_lock.h> 32 #include <linux/slab.h> 33 #include <linux/time.h> 34 #include <linux/vmalloc.h> 35 #include <linux/moduleparam.h> 36 #include <linux/string.h> 37 #include <sound/core.h> 38 #include <sound/minors.h> 39 #include <sound/pcm.h> 40 #include <sound/pcm_params.h> 41 #include "pcm_plugin.h" 42 #include <sound/info.h> 43 #include <linux/soundcard.h> 44 #include <sound/initval.h> 45 46 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 47 48 static int dsp_map[SNDRV_CARDS]; 49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 50 static int nonblock_open = 1; 51 52 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 54 MODULE_LICENSE("GPL"); 55 module_param_array(dsp_map, int, NULL, 0444); 56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 57 module_param_array(adsp_map, int, NULL, 0444); 58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 59 module_param(nonblock_open, bool, 0644); 60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 63 64 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg); 65 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 66 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 67 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 68 69 static inline mm_segment_t snd_enter_user(void) 70 { 71 mm_segment_t fs = get_fs(); 72 set_fs(get_ds()); 73 return fs; 74 } 75 76 static inline void snd_leave_user(mm_segment_t fs) 77 { 78 set_fs(fs); 79 } 80 81 /* 82 * helper functions to process hw_params 83 */ 84 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 85 { 86 int changed = 0; 87 if (i->min < min) { 88 i->min = min; 89 i->openmin = openmin; 90 changed = 1; 91 } else if (i->min == min && !i->openmin && openmin) { 92 i->openmin = 1; 93 changed = 1; 94 } 95 if (i->integer) { 96 if (i->openmin) { 97 i->min++; 98 i->openmin = 0; 99 } 100 } 101 if (snd_interval_checkempty(i)) { 102 snd_interval_none(i); 103 return -EINVAL; 104 } 105 return changed; 106 } 107 108 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 109 { 110 int changed = 0; 111 if (i->max > max) { 112 i->max = max; 113 i->openmax = openmax; 114 changed = 1; 115 } else if (i->max == max && !i->openmax && openmax) { 116 i->openmax = 1; 117 changed = 1; 118 } 119 if (i->integer) { 120 if (i->openmax) { 121 i->max--; 122 i->openmax = 0; 123 } 124 } 125 if (snd_interval_checkempty(i)) { 126 snd_interval_none(i); 127 return -EINVAL; 128 } 129 return changed; 130 } 131 132 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 133 { 134 struct snd_interval t; 135 t.empty = 0; 136 t.min = t.max = val; 137 t.openmin = t.openmax = 0; 138 t.integer = 1; 139 return snd_interval_refine(i, &t); 140 } 141 142 /** 143 * snd_pcm_hw_param_value_min 144 * @params: the hw_params instance 145 * @var: parameter to retrieve 146 * @dir: pointer to the direction (-1,0,1) or NULL 147 * 148 * Return the minimum value for field PAR. 149 */ 150 static unsigned int 151 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 152 snd_pcm_hw_param_t var, int *dir) 153 { 154 if (hw_is_mask(var)) { 155 if (dir) 156 *dir = 0; 157 return snd_mask_min(hw_param_mask_c(params, var)); 158 } 159 if (hw_is_interval(var)) { 160 const struct snd_interval *i = hw_param_interval_c(params, var); 161 if (dir) 162 *dir = i->openmin; 163 return snd_interval_min(i); 164 } 165 return -EINVAL; 166 } 167 168 /** 169 * snd_pcm_hw_param_value_max 170 * @params: the hw_params instance 171 * @var: parameter to retrieve 172 * @dir: pointer to the direction (-1,0,1) or NULL 173 * 174 * Return the maximum value for field PAR. 175 */ 176 static unsigned int 177 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 178 snd_pcm_hw_param_t var, int *dir) 179 { 180 if (hw_is_mask(var)) { 181 if (dir) 182 *dir = 0; 183 return snd_mask_max(hw_param_mask_c(params, var)); 184 } 185 if (hw_is_interval(var)) { 186 const struct snd_interval *i = hw_param_interval_c(params, var); 187 if (dir) 188 *dir = - (int) i->openmax; 189 return snd_interval_max(i); 190 } 191 return -EINVAL; 192 } 193 194 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 195 snd_pcm_hw_param_t var, 196 const struct snd_mask *val) 197 { 198 int changed; 199 changed = snd_mask_refine(hw_param_mask(params, var), val); 200 if (changed) { 201 params->cmask |= 1 << var; 202 params->rmask |= 1 << var; 203 } 204 return changed; 205 } 206 207 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 208 struct snd_pcm_hw_params *params, 209 snd_pcm_hw_param_t var, 210 const struct snd_mask *val) 211 { 212 int changed = _snd_pcm_hw_param_mask(params, var, val); 213 if (changed < 0) 214 return changed; 215 if (params->rmask) { 216 int err = snd_pcm_hw_refine(pcm, params); 217 if (err < 0) 218 return err; 219 } 220 return 0; 221 } 222 223 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 224 snd_pcm_hw_param_t var, unsigned int val, 225 int dir) 226 { 227 int changed; 228 int open = 0; 229 if (dir) { 230 if (dir > 0) { 231 open = 1; 232 } else if (dir < 0) { 233 if (val > 0) { 234 open = 1; 235 val--; 236 } 237 } 238 } 239 if (hw_is_mask(var)) 240 changed = snd_mask_refine_min(hw_param_mask(params, var), 241 val + !!open); 242 else if (hw_is_interval(var)) 243 changed = snd_interval_refine_min(hw_param_interval(params, var), 244 val, open); 245 else 246 return -EINVAL; 247 if (changed) { 248 params->cmask |= 1 << var; 249 params->rmask |= 1 << var; 250 } 251 return changed; 252 } 253 254 /** 255 * snd_pcm_hw_param_min 256 * @pcm: PCM instance 257 * @params: the hw_params instance 258 * @var: parameter to retrieve 259 * @val: minimal value 260 * @dir: pointer to the direction (-1,0,1) or NULL 261 * 262 * Inside configuration space defined by PARAMS remove from PAR all 263 * values < VAL. Reduce configuration space accordingly. 264 * Return new minimum or -EINVAL if the configuration space is empty 265 */ 266 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 267 struct snd_pcm_hw_params *params, 268 snd_pcm_hw_param_t var, unsigned int val, 269 int *dir) 270 { 271 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 272 if (changed < 0) 273 return changed; 274 if (params->rmask) { 275 int err = snd_pcm_hw_refine(pcm, params); 276 if (err < 0) 277 return err; 278 } 279 return snd_pcm_hw_param_value_min(params, var, dir); 280 } 281 282 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 283 snd_pcm_hw_param_t var, unsigned int val, 284 int dir) 285 { 286 int changed; 287 int open = 0; 288 if (dir) { 289 if (dir < 0) { 290 open = 1; 291 } else if (dir > 0) { 292 open = 1; 293 val++; 294 } 295 } 296 if (hw_is_mask(var)) { 297 if (val == 0 && open) { 298 snd_mask_none(hw_param_mask(params, var)); 299 changed = -EINVAL; 300 } else 301 changed = snd_mask_refine_max(hw_param_mask(params, var), 302 val - !!open); 303 } else if (hw_is_interval(var)) 304 changed = snd_interval_refine_max(hw_param_interval(params, var), 305 val, open); 306 else 307 return -EINVAL; 308 if (changed) { 309 params->cmask |= 1 << var; 310 params->rmask |= 1 << var; 311 } 312 return changed; 313 } 314 315 /** 316 * snd_pcm_hw_param_max 317 * @pcm: PCM instance 318 * @params: the hw_params instance 319 * @var: parameter to retrieve 320 * @val: maximal value 321 * @dir: pointer to the direction (-1,0,1) or NULL 322 * 323 * Inside configuration space defined by PARAMS remove from PAR all 324 * values >= VAL + 1. Reduce configuration space accordingly. 325 * Return new maximum or -EINVAL if the configuration space is empty 326 */ 327 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 328 struct snd_pcm_hw_params *params, 329 snd_pcm_hw_param_t var, unsigned int val, 330 int *dir) 331 { 332 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 333 if (changed < 0) 334 return changed; 335 if (params->rmask) { 336 int err = snd_pcm_hw_refine(pcm, params); 337 if (err < 0) 338 return err; 339 } 340 return snd_pcm_hw_param_value_max(params, var, dir); 341 } 342 343 static int boundary_sub(int a, int adir, 344 int b, int bdir, 345 int *c, int *cdir) 346 { 347 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 348 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 349 *c = a - b; 350 *cdir = adir - bdir; 351 if (*cdir == -2) { 352 (*c)--; 353 } else if (*cdir == 2) { 354 (*c)++; 355 } 356 return 0; 357 } 358 359 static int boundary_lt(unsigned int a, int adir, 360 unsigned int b, int bdir) 361 { 362 if (adir < 0) { 363 a--; 364 adir = 1; 365 } else if (adir > 0) 366 adir = 1; 367 if (bdir < 0) { 368 b--; 369 bdir = 1; 370 } else if (bdir > 0) 371 bdir = 1; 372 return a < b || (a == b && adir < bdir); 373 } 374 375 /* Return 1 if min is nearer to best than max */ 376 static int boundary_nearer(int min, int mindir, 377 int best, int bestdir, 378 int max, int maxdir) 379 { 380 int dmin, dmindir; 381 int dmax, dmaxdir; 382 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 383 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 384 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 385 } 386 387 /** 388 * snd_pcm_hw_param_near 389 * @pcm: PCM instance 390 * @params: the hw_params instance 391 * @var: parameter to retrieve 392 * @best: value to set 393 * @dir: pointer to the direction (-1,0,1) or NULL 394 * 395 * Inside configuration space defined by PARAMS set PAR to the available value 396 * nearest to VAL. Reduce configuration space accordingly. 397 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 398 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 399 * Return the value found. 400 */ 401 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 402 struct snd_pcm_hw_params *params, 403 snd_pcm_hw_param_t var, unsigned int best, 404 int *dir) 405 { 406 struct snd_pcm_hw_params *save = NULL; 407 int v; 408 unsigned int saved_min; 409 int last = 0; 410 int min, max; 411 int mindir, maxdir; 412 int valdir = dir ? *dir : 0; 413 /* FIXME */ 414 if (best > INT_MAX) 415 best = INT_MAX; 416 min = max = best; 417 mindir = maxdir = valdir; 418 if (maxdir > 0) 419 maxdir = 0; 420 else if (maxdir == 0) 421 maxdir = -1; 422 else { 423 maxdir = 1; 424 max--; 425 } 426 save = kmalloc(sizeof(*save), GFP_KERNEL); 427 if (save == NULL) 428 return -ENOMEM; 429 *save = *params; 430 saved_min = min; 431 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 432 if (min >= 0) { 433 struct snd_pcm_hw_params *params1; 434 if (max < 0) 435 goto _end; 436 if ((unsigned int)min == saved_min && mindir == valdir) 437 goto _end; 438 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 439 if (params1 == NULL) { 440 kfree(save); 441 return -ENOMEM; 442 } 443 *params1 = *save; 444 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 445 if (max < 0) { 446 kfree(params1); 447 goto _end; 448 } 449 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 450 *params = *params1; 451 last = 1; 452 } 453 kfree(params1); 454 } else { 455 *params = *save; 456 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 457 snd_assert(max >= 0, return -EINVAL); 458 last = 1; 459 } 460 _end: 461 kfree(save); 462 if (last) 463 v = snd_pcm_hw_param_last(pcm, params, var, dir); 464 else 465 v = snd_pcm_hw_param_first(pcm, params, var, dir); 466 snd_assert(v >= 0, return -EINVAL); 467 return v; 468 } 469 470 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 471 snd_pcm_hw_param_t var, unsigned int val, 472 int dir) 473 { 474 int changed; 475 if (hw_is_mask(var)) { 476 struct snd_mask *m = hw_param_mask(params, var); 477 if (val == 0 && dir < 0) { 478 changed = -EINVAL; 479 snd_mask_none(m); 480 } else { 481 if (dir > 0) 482 val++; 483 else if (dir < 0) 484 val--; 485 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 486 } 487 } else if (hw_is_interval(var)) { 488 struct snd_interval *i = hw_param_interval(params, var); 489 if (val == 0 && dir < 0) { 490 changed = -EINVAL; 491 snd_interval_none(i); 492 } else if (dir == 0) 493 changed = snd_interval_refine_set(i, val); 494 else { 495 struct snd_interval t; 496 t.openmin = 1; 497 t.openmax = 1; 498 t.empty = 0; 499 t.integer = 0; 500 if (dir < 0) { 501 t.min = val - 1; 502 t.max = val; 503 } else { 504 t.min = val; 505 t.max = val+1; 506 } 507 changed = snd_interval_refine(i, &t); 508 } 509 } else 510 return -EINVAL; 511 if (changed) { 512 params->cmask |= 1 << var; 513 params->rmask |= 1 << var; 514 } 515 return changed; 516 } 517 518 /** 519 * snd_pcm_hw_param_set 520 * @pcm: PCM instance 521 * @params: the hw_params instance 522 * @var: parameter to retrieve 523 * @val: value to set 524 * @dir: pointer to the direction (-1,0,1) or NULL 525 * 526 * Inside configuration space defined by PARAMS remove from PAR all 527 * values != VAL. Reduce configuration space accordingly. 528 * Return VAL or -EINVAL if the configuration space is empty 529 */ 530 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 531 struct snd_pcm_hw_params *params, 532 snd_pcm_hw_param_t var, unsigned int val, 533 int dir) 534 { 535 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 536 if (changed < 0) 537 return changed; 538 if (params->rmask) { 539 int err = snd_pcm_hw_refine(pcm, params); 540 if (err < 0) 541 return err; 542 } 543 return snd_pcm_hw_param_value(params, var, NULL); 544 } 545 546 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 547 snd_pcm_hw_param_t var) 548 { 549 int changed; 550 changed = snd_interval_setinteger(hw_param_interval(params, var)); 551 if (changed) { 552 params->cmask |= 1 << var; 553 params->rmask |= 1 << var; 554 } 555 return changed; 556 } 557 558 /* 559 * plugin 560 */ 561 562 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 563 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 564 { 565 struct snd_pcm_runtime *runtime = substream->runtime; 566 struct snd_pcm_plugin *plugin, *next; 567 568 plugin = runtime->oss.plugin_first; 569 while (plugin) { 570 next = plugin->next; 571 snd_pcm_plugin_free(plugin); 572 plugin = next; 573 } 574 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 575 return 0; 576 } 577 578 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 579 { 580 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 581 plugin->next = runtime->oss.plugin_first; 582 plugin->prev = NULL; 583 if (runtime->oss.plugin_first) { 584 runtime->oss.plugin_first->prev = plugin; 585 runtime->oss.plugin_first = plugin; 586 } else { 587 runtime->oss.plugin_last = 588 runtime->oss.plugin_first = plugin; 589 } 590 return 0; 591 } 592 593 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 594 { 595 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 596 plugin->next = NULL; 597 plugin->prev = runtime->oss.plugin_last; 598 if (runtime->oss.plugin_last) { 599 runtime->oss.plugin_last->next = plugin; 600 runtime->oss.plugin_last = plugin; 601 } else { 602 runtime->oss.plugin_last = 603 runtime->oss.plugin_first = plugin; 604 } 605 return 0; 606 } 607 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 608 609 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 610 { 611 struct snd_pcm_runtime *runtime = substream->runtime; 612 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 613 long bytes = frames_to_bytes(runtime, frames); 614 if (buffer_size == runtime->oss.buffer_bytes) 615 return bytes; 616 #if BITS_PER_LONG >= 64 617 return runtime->oss.buffer_bytes * bytes / buffer_size; 618 #else 619 { 620 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 621 u32 rem; 622 div64_32(&bsize, buffer_size, &rem); 623 return (long)bsize; 624 } 625 #endif 626 } 627 628 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 629 { 630 struct snd_pcm_runtime *runtime = substream->runtime; 631 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 632 if (buffer_size == runtime->oss.buffer_bytes) 633 return bytes_to_frames(runtime, bytes); 634 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 635 } 636 637 static int snd_pcm_oss_format_from(int format) 638 { 639 switch (format) { 640 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 641 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 642 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 643 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 644 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 645 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 646 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 647 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 648 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 649 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 650 default: return SNDRV_PCM_FORMAT_U8; 651 } 652 } 653 654 static int snd_pcm_oss_format_to(int format) 655 { 656 switch (format) { 657 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 658 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 659 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 660 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 661 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 662 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 663 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 664 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 665 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 666 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 667 default: return -EINVAL; 668 } 669 } 670 671 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 672 struct snd_pcm_hw_params *oss_params, 673 struct snd_pcm_hw_params *slave_params) 674 { 675 size_t s; 676 size_t oss_buffer_size, oss_period_size, oss_periods; 677 size_t min_period_size, max_period_size; 678 struct snd_pcm_runtime *runtime = substream->runtime; 679 size_t oss_frame_size; 680 681 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 682 params_channels(oss_params) / 8; 683 684 oss_buffer_size = snd_pcm_plug_client_size(substream, 685 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 686 oss_buffer_size = 1 << ld2(oss_buffer_size); 687 if (atomic_read(&substream->mmap_count)) { 688 if (oss_buffer_size > runtime->oss.mmap_bytes) 689 oss_buffer_size = runtime->oss.mmap_bytes; 690 } 691 692 if (substream->oss.setup.period_size > 16) 693 oss_period_size = substream->oss.setup.period_size; 694 else if (runtime->oss.fragshift) { 695 oss_period_size = 1 << runtime->oss.fragshift; 696 if (oss_period_size > oss_buffer_size / 2) 697 oss_period_size = oss_buffer_size / 2; 698 } else { 699 int sd; 700 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 701 702 oss_period_size = oss_buffer_size; 703 do { 704 oss_period_size /= 2; 705 } while (oss_period_size > bytes_per_sec); 706 if (runtime->oss.subdivision == 0) { 707 sd = 4; 708 if (oss_period_size / sd > 4096) 709 sd *= 2; 710 if (oss_period_size / sd < 4096) 711 sd = 1; 712 } else 713 sd = runtime->oss.subdivision; 714 oss_period_size /= sd; 715 if (oss_period_size < 16) 716 oss_period_size = 16; 717 } 718 719 min_period_size = snd_pcm_plug_client_size(substream, 720 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 721 min_period_size *= oss_frame_size; 722 min_period_size = 1 << (ld2(min_period_size - 1) + 1); 723 if (oss_period_size < min_period_size) 724 oss_period_size = min_period_size; 725 726 max_period_size = snd_pcm_plug_client_size(substream, 727 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 728 max_period_size *= oss_frame_size; 729 max_period_size = 1 << ld2(max_period_size); 730 if (oss_period_size > max_period_size) 731 oss_period_size = max_period_size; 732 733 oss_periods = oss_buffer_size / oss_period_size; 734 735 if (substream->oss.setup.periods > 1) 736 oss_periods = substream->oss.setup.periods; 737 738 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 739 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 740 s = runtime->oss.maxfrags; 741 if (oss_periods > s) 742 oss_periods = s; 743 744 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 745 if (s < 2) 746 s = 2; 747 if (oss_periods < s) 748 oss_periods = s; 749 750 while (oss_period_size * oss_periods > oss_buffer_size) 751 oss_period_size /= 2; 752 753 snd_assert(oss_period_size >= 16, return -EINVAL); 754 runtime->oss.period_bytes = oss_period_size; 755 runtime->oss.period_frames = 1; 756 runtime->oss.periods = oss_periods; 757 return 0; 758 } 759 760 static int choose_rate(struct snd_pcm_substream *substream, 761 struct snd_pcm_hw_params *params, unsigned int best_rate) 762 { 763 struct snd_interval *it; 764 struct snd_pcm_hw_params *save; 765 unsigned int rate, prev; 766 767 save = kmalloc(sizeof(*save), GFP_KERNEL); 768 if (save == NULL) 769 return -ENOMEM; 770 *save = *params; 771 it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); 772 773 /* try multiples of the best rate */ 774 rate = best_rate; 775 for (;;) { 776 if (it->max < rate || (it->max == rate && it->openmax)) 777 break; 778 if (it->min < rate || (it->min == rate && !it->openmin)) { 779 int ret; 780 ret = snd_pcm_hw_param_set(substream, params, 781 SNDRV_PCM_HW_PARAM_RATE, 782 rate, 0); 783 if (ret == (int)rate) { 784 kfree(save); 785 return rate; 786 } 787 *params = *save; 788 } 789 prev = rate; 790 rate += best_rate; 791 if (rate <= prev) 792 break; 793 } 794 795 /* not found, use the nearest rate */ 796 kfree(save); 797 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 798 } 799 800 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream) 801 { 802 struct snd_pcm_runtime *runtime = substream->runtime; 803 struct snd_pcm_hw_params *params, *sparams; 804 struct snd_pcm_sw_params *sw_params; 805 ssize_t oss_buffer_size, oss_period_size; 806 size_t oss_frame_size; 807 int err; 808 int direct; 809 int format, sformat, n; 810 struct snd_mask sformat_mask; 811 struct snd_mask mask; 812 813 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 814 return -EINTR; 815 sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); 816 params = kmalloc(sizeof(*params), GFP_KERNEL); 817 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 818 if (!sw_params || !params || !sparams) { 819 snd_printd("No memory\n"); 820 err = -ENOMEM; 821 goto failure; 822 } 823 824 if (atomic_read(&substream->mmap_count)) 825 direct = 1; 826 else 827 direct = substream->oss.setup.direct; 828 829 _snd_pcm_hw_params_any(sparams); 830 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 831 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 832 snd_mask_none(&mask); 833 if (atomic_read(&substream->mmap_count)) 834 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 835 else { 836 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED); 837 if (!direct) 838 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 839 } 840 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 841 if (err < 0) { 842 snd_printd("No usable accesses\n"); 843 err = -EINVAL; 844 goto failure; 845 } 846 choose_rate(substream, sparams, runtime->oss.rate); 847 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 848 849 format = snd_pcm_oss_format_from(runtime->oss.format); 850 851 sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 852 if (direct) 853 sformat = format; 854 else 855 sformat = snd_pcm_plug_slave_format(format, &sformat_mask); 856 857 if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) { 858 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) { 859 if (snd_mask_test(&sformat_mask, sformat) && 860 snd_pcm_oss_format_to(sformat) >= 0) 861 break; 862 } 863 if (sformat > SNDRV_PCM_FORMAT_LAST) { 864 snd_printd("Cannot find a format!!!\n"); 865 err = -EINVAL; 866 goto failure; 867 } 868 } 869 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0); 870 snd_assert(err >= 0, goto failure); 871 872 if (direct) { 873 memcpy(params, sparams, sizeof(*params)); 874 } else { 875 _snd_pcm_hw_params_any(params); 876 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 877 SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 878 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 879 snd_pcm_oss_format_from(runtime->oss.format), 0); 880 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 881 runtime->oss.channels, 0); 882 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 883 runtime->oss.rate, 0); 884 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 885 params_access(params), params_format(params), 886 params_channels(params), params_rate(params)); 887 } 888 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 889 params_access(sparams), params_format(sparams), 890 params_channels(sparams), params_rate(sparams)); 891 892 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 893 params_channels(params) / 8; 894 895 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 896 snd_pcm_oss_plugin_clear(substream); 897 if (!direct) { 898 /* add necessary plugins */ 899 snd_pcm_oss_plugin_clear(substream); 900 if ((err = snd_pcm_plug_format_plugins(substream, 901 params, 902 sparams)) < 0) { 903 snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err); 904 snd_pcm_oss_plugin_clear(substream); 905 goto failure; 906 } 907 if (runtime->oss.plugin_first) { 908 struct snd_pcm_plugin *plugin; 909 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 910 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); 911 snd_pcm_oss_plugin_clear(substream); 912 goto failure; 913 } 914 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 915 err = snd_pcm_plugin_append(plugin); 916 } else { 917 err = snd_pcm_plugin_insert(plugin); 918 } 919 if (err < 0) { 920 snd_pcm_oss_plugin_clear(substream); 921 goto failure; 922 } 923 } 924 } 925 #endif 926 927 err = snd_pcm_oss_period_size(substream, params, sparams); 928 if (err < 0) 929 goto failure; 930 931 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 932 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 933 snd_assert(err >= 0, goto failure); 934 935 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 936 runtime->oss.periods, NULL); 937 snd_assert(err >= 0, goto failure); 938 939 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 940 941 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 942 snd_printd("HW_PARAMS failed: %i\n", err); 943 goto failure; 944 } 945 946 memset(sw_params, 0, sizeof(*sw_params)); 947 if (runtime->oss.trigger) { 948 sw_params->start_threshold = 1; 949 } else { 950 sw_params->start_threshold = runtime->boundary; 951 } 952 if (atomic_read(&substream->mmap_count) || 953 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 954 sw_params->stop_threshold = runtime->boundary; 955 else 956 sw_params->stop_threshold = runtime->buffer_size; 957 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 958 sw_params->period_step = 1; 959 sw_params->sleep_min = 0; 960 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 961 1 : runtime->period_size; 962 sw_params->xfer_align = 1; 963 if (atomic_read(&substream->mmap_count) || 964 substream->oss.setup.nosilence) { 965 sw_params->silence_threshold = 0; 966 sw_params->silence_size = 0; 967 } else { 968 snd_pcm_uframes_t frames; 969 frames = runtime->period_size + 16; 970 if (frames > runtime->buffer_size) 971 frames = runtime->buffer_size; 972 sw_params->silence_threshold = frames; 973 sw_params->silence_size = frames; 974 } 975 976 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 977 snd_printd("SW_PARAMS failed: %i\n", err); 978 goto failure; 979 } 980 981 runtime->oss.periods = params_periods(sparams); 982 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 983 snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure); 984 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 985 if (runtime->oss.plugin_first) { 986 err = snd_pcm_plug_alloc(substream, oss_period_size); 987 if (err < 0) 988 goto failure; 989 } 990 #endif 991 oss_period_size *= oss_frame_size; 992 993 oss_buffer_size = oss_period_size * runtime->oss.periods; 994 snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure); 995 996 runtime->oss.period_bytes = oss_period_size; 997 runtime->oss.buffer_bytes = oss_buffer_size; 998 999 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1000 runtime->oss.period_bytes, 1001 runtime->oss.buffer_bytes); 1002 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1003 params_period_size(sparams), 1004 params_buffer_size(sparams)); 1005 1006 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1007 runtime->oss.channels = params_channels(params); 1008 runtime->oss.rate = params_rate(params); 1009 1010 runtime->oss.params = 0; 1011 runtime->oss.prepare = 1; 1012 vfree(runtime->oss.buffer); 1013 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1014 runtime->oss.buffer_used = 0; 1015 if (runtime->dma_area) 1016 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1017 1018 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1019 1020 err = 0; 1021 failure: 1022 kfree(sw_params); 1023 kfree(params); 1024 kfree(sparams); 1025 mutex_unlock(&runtime->oss.params_lock); 1026 return err; 1027 } 1028 1029 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1030 { 1031 int idx, err; 1032 struct snd_pcm_substream *asubstream = NULL, *substream; 1033 1034 for (idx = 0; idx < 2; idx++) { 1035 substream = pcm_oss_file->streams[idx]; 1036 if (substream == NULL) 1037 continue; 1038 if (asubstream == NULL) 1039 asubstream = substream; 1040 if (substream->runtime->oss.params) { 1041 err = snd_pcm_oss_change_params(substream); 1042 if (err < 0) 1043 return err; 1044 } 1045 } 1046 snd_assert(asubstream != NULL, return -EIO); 1047 if (r_substream) 1048 *r_substream = asubstream; 1049 return 0; 1050 } 1051 1052 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1053 { 1054 int err; 1055 struct snd_pcm_runtime *runtime = substream->runtime; 1056 1057 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1058 if (err < 0) { 1059 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1060 return err; 1061 } 1062 runtime->oss.prepare = 0; 1063 runtime->oss.prev_hw_ptr_interrupt = 0; 1064 runtime->oss.period_ptr = 0; 1065 runtime->oss.buffer_used = 0; 1066 1067 return 0; 1068 } 1069 1070 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1071 { 1072 struct snd_pcm_runtime *runtime; 1073 int err; 1074 1075 if (substream == NULL) 1076 return 0; 1077 runtime = substream->runtime; 1078 if (runtime->oss.params) { 1079 err = snd_pcm_oss_change_params(substream); 1080 if (err < 0) 1081 return err; 1082 } 1083 if (runtime->oss.prepare) { 1084 err = snd_pcm_oss_prepare(substream); 1085 if (err < 0) 1086 return err; 1087 } 1088 return 0; 1089 } 1090 1091 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1092 { 1093 struct snd_pcm_runtime *runtime; 1094 snd_pcm_uframes_t frames; 1095 int err = 0; 1096 1097 while (1) { 1098 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1099 if (err < 0) 1100 break; 1101 runtime = substream->runtime; 1102 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1103 break; 1104 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1105 /* until avail(delay) <= buffer_size */ 1106 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1107 frames /= runtime->period_size; 1108 frames *= runtime->period_size; 1109 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1110 if (err < 0) 1111 break; 1112 } 1113 return err; 1114 } 1115 1116 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1117 { 1118 struct snd_pcm_runtime *runtime = substream->runtime; 1119 int ret; 1120 while (1) { 1121 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1122 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1123 #ifdef OSS_DEBUG 1124 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1125 printk("pcm_oss: write: recovering from XRUN\n"); 1126 else 1127 printk("pcm_oss: write: recovering from SUSPEND\n"); 1128 #endif 1129 ret = snd_pcm_oss_prepare(substream); 1130 if (ret < 0) 1131 break; 1132 } 1133 if (in_kernel) { 1134 mm_segment_t fs; 1135 fs = snd_enter_user(); 1136 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1137 snd_leave_user(fs); 1138 } else { 1139 ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); 1140 } 1141 if (ret != -EPIPE && ret != -ESTRPIPE) 1142 break; 1143 /* test, if we can't store new data, because the stream */ 1144 /* has not been started */ 1145 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1146 return -EAGAIN; 1147 } 1148 return ret; 1149 } 1150 1151 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1152 { 1153 struct snd_pcm_runtime *runtime = substream->runtime; 1154 snd_pcm_sframes_t delay; 1155 int ret; 1156 while (1) { 1157 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1158 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1159 #ifdef OSS_DEBUG 1160 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1161 printk("pcm_oss: read: recovering from XRUN\n"); 1162 else 1163 printk("pcm_oss: read: recovering from SUSPEND\n"); 1164 #endif 1165 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1166 if (ret < 0) 1167 break; 1168 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1169 ret = snd_pcm_oss_prepare(substream); 1170 if (ret < 0) 1171 break; 1172 } 1173 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1174 if (ret < 0) 1175 break; 1176 if (in_kernel) { 1177 mm_segment_t fs; 1178 fs = snd_enter_user(); 1179 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1180 snd_leave_user(fs); 1181 } else { 1182 ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); 1183 } 1184 if (ret == -EPIPE) { 1185 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1186 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1187 if (ret < 0) 1188 break; 1189 } 1190 continue; 1191 } 1192 if (ret != -ESTRPIPE) 1193 break; 1194 } 1195 return ret; 1196 } 1197 1198 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1199 { 1200 struct snd_pcm_runtime *runtime = substream->runtime; 1201 int ret; 1202 while (1) { 1203 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1204 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1205 #ifdef OSS_DEBUG 1206 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1207 printk("pcm_oss: writev: recovering from XRUN\n"); 1208 else 1209 printk("pcm_oss: writev: recovering from SUSPEND\n"); 1210 #endif 1211 ret = snd_pcm_oss_prepare(substream); 1212 if (ret < 0) 1213 break; 1214 } 1215 if (in_kernel) { 1216 mm_segment_t fs; 1217 fs = snd_enter_user(); 1218 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1219 snd_leave_user(fs); 1220 } else { 1221 ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); 1222 } 1223 if (ret != -EPIPE && ret != -ESTRPIPE) 1224 break; 1225 1226 /* test, if we can't store new data, because the stream */ 1227 /* has not been started */ 1228 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1229 return -EAGAIN; 1230 } 1231 return ret; 1232 } 1233 1234 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) 1235 { 1236 struct snd_pcm_runtime *runtime = substream->runtime; 1237 int ret; 1238 while (1) { 1239 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1240 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1241 #ifdef OSS_DEBUG 1242 if (runtime->status->state == SNDRV_PCM_STATE_XRUN) 1243 printk("pcm_oss: readv: recovering from XRUN\n"); 1244 else 1245 printk("pcm_oss: readv: recovering from SUSPEND\n"); 1246 #endif 1247 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1248 if (ret < 0) 1249 break; 1250 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1251 ret = snd_pcm_oss_prepare(substream); 1252 if (ret < 0) 1253 break; 1254 } 1255 if (in_kernel) { 1256 mm_segment_t fs; 1257 fs = snd_enter_user(); 1258 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1259 snd_leave_user(fs); 1260 } else { 1261 ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); 1262 } 1263 if (ret != -EPIPE && ret != -ESTRPIPE) 1264 break; 1265 } 1266 return ret; 1267 } 1268 1269 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1270 { 1271 struct snd_pcm_runtime *runtime = substream->runtime; 1272 snd_pcm_sframes_t frames, frames1; 1273 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1274 if (runtime->oss.plugin_first) { 1275 struct snd_pcm_plugin_channel *channels; 1276 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1277 if (!in_kernel) { 1278 if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes)) 1279 return -EFAULT; 1280 buf = runtime->oss.buffer; 1281 } 1282 frames = bytes / oss_frame_bytes; 1283 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1284 if (frames1 < 0) 1285 return frames1; 1286 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1287 if (frames1 <= 0) 1288 return frames1; 1289 bytes = frames1 * oss_frame_bytes; 1290 } else 1291 #endif 1292 { 1293 frames = bytes_to_frames(runtime, bytes); 1294 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1295 if (frames1 <= 0) 1296 return frames1; 1297 bytes = frames_to_bytes(runtime, frames1); 1298 } 1299 return bytes; 1300 } 1301 1302 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1303 { 1304 size_t xfer = 0; 1305 ssize_t tmp; 1306 struct snd_pcm_runtime *runtime = substream->runtime; 1307 1308 if (atomic_read(&substream->mmap_count)) 1309 return -ENXIO; 1310 1311 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1312 return tmp; 1313 mutex_lock(&runtime->oss.params_lock); 1314 while (bytes > 0) { 1315 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1316 tmp = bytes; 1317 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1318 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1319 if (tmp > 0) { 1320 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1321 tmp = -EFAULT; 1322 goto err; 1323 } 1324 } 1325 runtime->oss.buffer_used += tmp; 1326 buf += tmp; 1327 bytes -= tmp; 1328 xfer += tmp; 1329 if (substream->oss.setup.partialfrag || 1330 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1331 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1332 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1333 if (tmp <= 0) 1334 goto err; 1335 runtime->oss.bytes += tmp; 1336 runtime->oss.period_ptr += tmp; 1337 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1338 if (runtime->oss.period_ptr == 0 || 1339 runtime->oss.period_ptr == runtime->oss.buffer_used) 1340 runtime->oss.buffer_used = 0; 1341 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1342 tmp = -EAGAIN; 1343 goto err; 1344 } 1345 } 1346 } else { 1347 tmp = snd_pcm_oss_write2(substream, 1348 (const char __force *)buf, 1349 runtime->oss.period_bytes, 0); 1350 if (tmp <= 0) 1351 goto err; 1352 runtime->oss.bytes += tmp; 1353 buf += tmp; 1354 bytes -= tmp; 1355 xfer += tmp; 1356 if ((substream->f_flags & O_NONBLOCK) != 0 && 1357 tmp != runtime->oss.period_bytes) 1358 break; 1359 } 1360 } 1361 mutex_unlock(&runtime->oss.params_lock); 1362 return xfer; 1363 1364 err: 1365 mutex_unlock(&runtime->oss.params_lock); 1366 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1367 } 1368 1369 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1370 { 1371 struct snd_pcm_runtime *runtime = substream->runtime; 1372 snd_pcm_sframes_t frames, frames1; 1373 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1374 char __user *final_dst = (char __user *)buf; 1375 if (runtime->oss.plugin_first) { 1376 struct snd_pcm_plugin_channel *channels; 1377 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1378 if (!in_kernel) 1379 buf = runtime->oss.buffer; 1380 frames = bytes / oss_frame_bytes; 1381 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1382 if (frames1 < 0) 1383 return frames1; 1384 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1385 if (frames1 <= 0) 1386 return frames1; 1387 bytes = frames1 * oss_frame_bytes; 1388 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1389 return -EFAULT; 1390 } else 1391 #endif 1392 { 1393 frames = bytes_to_frames(runtime, bytes); 1394 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1395 if (frames1 <= 0) 1396 return frames1; 1397 bytes = frames_to_bytes(runtime, frames1); 1398 } 1399 return bytes; 1400 } 1401 1402 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1403 { 1404 size_t xfer = 0; 1405 ssize_t tmp; 1406 struct snd_pcm_runtime *runtime = substream->runtime; 1407 1408 if (atomic_read(&substream->mmap_count)) 1409 return -ENXIO; 1410 1411 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1412 return tmp; 1413 mutex_lock(&runtime->oss.params_lock); 1414 while (bytes > 0) { 1415 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1416 if (runtime->oss.buffer_used == 0) { 1417 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1418 if (tmp <= 0) 1419 goto err; 1420 runtime->oss.bytes += tmp; 1421 runtime->oss.period_ptr = tmp; 1422 runtime->oss.buffer_used = tmp; 1423 } 1424 tmp = bytes; 1425 if ((size_t) tmp > runtime->oss.buffer_used) 1426 tmp = runtime->oss.buffer_used; 1427 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1428 tmp = -EFAULT; 1429 goto err; 1430 } 1431 buf += tmp; 1432 bytes -= tmp; 1433 xfer += tmp; 1434 runtime->oss.buffer_used -= tmp; 1435 } else { 1436 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1437 runtime->oss.period_bytes, 0); 1438 if (tmp <= 0) 1439 goto err; 1440 runtime->oss.bytes += tmp; 1441 buf += tmp; 1442 bytes -= tmp; 1443 xfer += tmp; 1444 } 1445 } 1446 mutex_unlock(&runtime->oss.params_lock); 1447 return xfer; 1448 1449 err: 1450 mutex_unlock(&runtime->oss.params_lock); 1451 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1452 } 1453 1454 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1455 { 1456 struct snd_pcm_substream *substream; 1457 1458 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1459 if (substream != NULL) { 1460 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1461 substream->runtime->oss.prepare = 1; 1462 } 1463 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1464 if (substream != NULL) { 1465 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1466 substream->runtime->oss.prepare = 1; 1467 } 1468 return 0; 1469 } 1470 1471 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1472 { 1473 struct snd_pcm_substream *substream; 1474 int err; 1475 1476 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1477 if (substream != NULL) { 1478 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1479 return err; 1480 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1481 } 1482 /* note: all errors from the start action are ignored */ 1483 /* OSS apps do not know, how to handle them */ 1484 return 0; 1485 } 1486 1487 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1488 { 1489 struct snd_pcm_runtime *runtime; 1490 ssize_t result = 0; 1491 long res; 1492 wait_queue_t wait; 1493 1494 runtime = substream->runtime; 1495 init_waitqueue_entry(&wait, current); 1496 add_wait_queue(&runtime->sleep, &wait); 1497 #ifdef OSS_DEBUG 1498 printk("sync1: size = %li\n", size); 1499 #endif 1500 while (1) { 1501 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1502 if (result > 0) { 1503 runtime->oss.buffer_used = 0; 1504 result = 0; 1505 break; 1506 } 1507 if (result != 0 && result != -EAGAIN) 1508 break; 1509 result = 0; 1510 set_current_state(TASK_INTERRUPTIBLE); 1511 snd_pcm_stream_lock_irq(substream); 1512 res = runtime->status->state; 1513 snd_pcm_stream_unlock_irq(substream); 1514 if (res != SNDRV_PCM_STATE_RUNNING) { 1515 set_current_state(TASK_RUNNING); 1516 break; 1517 } 1518 res = schedule_timeout(10 * HZ); 1519 if (signal_pending(current)) { 1520 result = -ERESTARTSYS; 1521 break; 1522 } 1523 if (res == 0) { 1524 snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); 1525 result = -EIO; 1526 break; 1527 } 1528 } 1529 remove_wait_queue(&runtime->sleep, &wait); 1530 return result; 1531 } 1532 1533 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1534 { 1535 int err = 0; 1536 unsigned int saved_f_flags; 1537 struct snd_pcm_substream *substream; 1538 struct snd_pcm_runtime *runtime; 1539 snd_pcm_format_t format; 1540 unsigned long width; 1541 size_t size; 1542 1543 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1544 if (substream != NULL) { 1545 runtime = substream->runtime; 1546 if (atomic_read(&substream->mmap_count)) 1547 goto __direct; 1548 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1549 return err; 1550 format = snd_pcm_oss_format_from(runtime->oss.format); 1551 width = snd_pcm_format_physical_width(format); 1552 mutex_lock(&runtime->oss.params_lock); 1553 if (runtime->oss.buffer_used > 0) { 1554 #ifdef OSS_DEBUG 1555 printk("sync: buffer_used\n"); 1556 #endif 1557 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1558 snd_pcm_format_set_silence(format, 1559 runtime->oss.buffer + runtime->oss.buffer_used, 1560 size); 1561 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1562 if (err < 0) { 1563 mutex_unlock(&runtime->oss.params_lock); 1564 return err; 1565 } 1566 } else if (runtime->oss.period_ptr > 0) { 1567 #ifdef OSS_DEBUG 1568 printk("sync: period_ptr\n"); 1569 #endif 1570 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1571 snd_pcm_format_set_silence(format, 1572 runtime->oss.buffer, 1573 size * 8 / width); 1574 err = snd_pcm_oss_sync1(substream, size); 1575 if (err < 0) { 1576 mutex_unlock(&runtime->oss.params_lock); 1577 return err; 1578 } 1579 } 1580 /* 1581 * The ALSA's period might be a bit large than OSS one. 1582 * Fill the remain portion of ALSA period with zeros. 1583 */ 1584 size = runtime->control->appl_ptr % runtime->period_size; 1585 if (size > 0) { 1586 size = runtime->period_size - size; 1587 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { 1588 size = (runtime->frame_bits * size) / 8; 1589 while (size > 0) { 1590 mm_segment_t fs; 1591 size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; 1592 size -= size1; 1593 size1 *= 8; 1594 size1 /= runtime->sample_bits; 1595 snd_pcm_format_set_silence(runtime->format, 1596 runtime->oss.buffer, 1597 size1); 1598 fs = snd_enter_user(); 1599 snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1); 1600 snd_leave_user(fs); 1601 } 1602 } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { 1603 void __user *buffers[runtime->channels]; 1604 memset(buffers, 0, runtime->channels * sizeof(void *)); 1605 snd_pcm_lib_writev(substream, buffers, size); 1606 } 1607 } 1608 mutex_unlock(&runtime->oss.params_lock); 1609 /* 1610 * finish sync: drain the buffer 1611 */ 1612 __direct: 1613 saved_f_flags = substream->f_flags; 1614 substream->f_flags &= ~O_NONBLOCK; 1615 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1616 substream->f_flags = saved_f_flags; 1617 if (err < 0) 1618 return err; 1619 runtime->oss.prepare = 1; 1620 } 1621 1622 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1623 if (substream != NULL) { 1624 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1625 return err; 1626 runtime = substream->runtime; 1627 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1628 if (err < 0) 1629 return err; 1630 runtime->oss.buffer_used = 0; 1631 runtime->oss.prepare = 1; 1632 } 1633 return 0; 1634 } 1635 1636 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1637 { 1638 int idx; 1639 1640 for (idx = 1; idx >= 0; --idx) { 1641 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1642 struct snd_pcm_runtime *runtime; 1643 if (substream == NULL) 1644 continue; 1645 runtime = substream->runtime; 1646 if (rate < 1000) 1647 rate = 1000; 1648 else if (rate > 192000) 1649 rate = 192000; 1650 if (runtime->oss.rate != rate) { 1651 runtime->oss.params = 1; 1652 runtime->oss.rate = rate; 1653 } 1654 } 1655 return snd_pcm_oss_get_rate(pcm_oss_file); 1656 } 1657 1658 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1659 { 1660 struct snd_pcm_substream *substream; 1661 int err; 1662 1663 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1664 return err; 1665 return substream->runtime->oss.rate; 1666 } 1667 1668 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1669 { 1670 int idx; 1671 if (channels < 1) 1672 channels = 1; 1673 if (channels > 128) 1674 return -EINVAL; 1675 for (idx = 1; idx >= 0; --idx) { 1676 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1677 struct snd_pcm_runtime *runtime; 1678 if (substream == NULL) 1679 continue; 1680 runtime = substream->runtime; 1681 if (runtime->oss.channels != channels) { 1682 runtime->oss.params = 1; 1683 runtime->oss.channels = channels; 1684 } 1685 } 1686 return snd_pcm_oss_get_channels(pcm_oss_file); 1687 } 1688 1689 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1690 { 1691 struct snd_pcm_substream *substream; 1692 int err; 1693 1694 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1695 return err; 1696 return substream->runtime->oss.channels; 1697 } 1698 1699 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1700 { 1701 struct snd_pcm_substream *substream; 1702 int err; 1703 1704 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1705 return err; 1706 return substream->runtime->oss.period_bytes; 1707 } 1708 1709 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1710 { 1711 struct snd_pcm_substream *substream; 1712 int err; 1713 int direct; 1714 struct snd_pcm_hw_params *params; 1715 unsigned int formats = 0; 1716 struct snd_mask format_mask; 1717 int fmt; 1718 1719 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1720 return err; 1721 if (atomic_read(&substream->mmap_count)) 1722 direct = 1; 1723 else 1724 direct = substream->oss.setup.direct; 1725 if (!direct) 1726 return AFMT_MU_LAW | AFMT_U8 | 1727 AFMT_S16_LE | AFMT_S16_BE | 1728 AFMT_S8 | AFMT_U16_LE | 1729 AFMT_U16_BE; 1730 params = kmalloc(sizeof(*params), GFP_KERNEL); 1731 if (!params) 1732 return -ENOMEM; 1733 _snd_pcm_hw_params_any(params); 1734 err = snd_pcm_hw_refine(substream, params); 1735 format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 1736 kfree(params); 1737 snd_assert(err >= 0, return err); 1738 for (fmt = 0; fmt < 32; ++fmt) { 1739 if (snd_mask_test(&format_mask, fmt)) { 1740 int f = snd_pcm_oss_format_to(fmt); 1741 if (f >= 0) 1742 formats |= f; 1743 } 1744 } 1745 return formats; 1746 } 1747 1748 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1749 { 1750 int formats, idx; 1751 1752 if (format != AFMT_QUERY) { 1753 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1754 if (formats < 0) 1755 return formats; 1756 if (!(formats & format)) 1757 format = AFMT_U8; 1758 for (idx = 1; idx >= 0; --idx) { 1759 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1760 struct snd_pcm_runtime *runtime; 1761 if (substream == NULL) 1762 continue; 1763 runtime = substream->runtime; 1764 if (runtime->oss.format != format) { 1765 runtime->oss.params = 1; 1766 runtime->oss.format = format; 1767 } 1768 } 1769 } 1770 return snd_pcm_oss_get_format(pcm_oss_file); 1771 } 1772 1773 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1774 { 1775 struct snd_pcm_substream *substream; 1776 int err; 1777 1778 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1779 return err; 1780 return substream->runtime->oss.format; 1781 } 1782 1783 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1784 { 1785 struct snd_pcm_runtime *runtime; 1786 1787 if (substream == NULL) 1788 return 0; 1789 runtime = substream->runtime; 1790 if (subdivide == 0) { 1791 subdivide = runtime->oss.subdivision; 1792 if (subdivide == 0) 1793 subdivide = 1; 1794 return subdivide; 1795 } 1796 if (runtime->oss.subdivision || runtime->oss.fragshift) 1797 return -EINVAL; 1798 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1799 subdivide != 8 && subdivide != 16) 1800 return -EINVAL; 1801 runtime->oss.subdivision = subdivide; 1802 runtime->oss.params = 1; 1803 return subdivide; 1804 } 1805 1806 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1807 { 1808 int err = -EINVAL, idx; 1809 1810 for (idx = 1; idx >= 0; --idx) { 1811 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1812 if (substream == NULL) 1813 continue; 1814 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1815 return err; 1816 } 1817 return err; 1818 } 1819 1820 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1821 { 1822 struct snd_pcm_runtime *runtime; 1823 1824 if (substream == NULL) 1825 return 0; 1826 runtime = substream->runtime; 1827 if (runtime->oss.subdivision || runtime->oss.fragshift) 1828 return -EINVAL; 1829 runtime->oss.fragshift = val & 0xffff; 1830 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1831 if (runtime->oss.fragshift < 4) /* < 16 */ 1832 runtime->oss.fragshift = 4; 1833 if (runtime->oss.maxfrags < 2) 1834 runtime->oss.maxfrags = 2; 1835 runtime->oss.params = 1; 1836 return 0; 1837 } 1838 1839 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1840 { 1841 int err = -EINVAL, idx; 1842 1843 for (idx = 1; idx >= 0; --idx) { 1844 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1845 if (substream == NULL) 1846 continue; 1847 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1848 return err; 1849 } 1850 return err; 1851 } 1852 1853 static int snd_pcm_oss_nonblock(struct file * file) 1854 { 1855 file->f_flags |= O_NONBLOCK; 1856 return 0; 1857 } 1858 1859 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1860 { 1861 1862 if (substream == NULL) { 1863 res &= ~DSP_CAP_DUPLEX; 1864 return res; 1865 } 1866 #ifdef DSP_CAP_MULTI 1867 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1868 if (substream->pstr->substream_count > 1) 1869 res |= DSP_CAP_MULTI; 1870 #endif 1871 /* DSP_CAP_REALTIME is set all times: */ 1872 /* all ALSA drivers can return actual pointer in ring buffer */ 1873 #if defined(DSP_CAP_REALTIME) && 0 1874 { 1875 struct snd_pcm_runtime *runtime = substream->runtime; 1876 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1877 res &= ~DSP_CAP_REALTIME; 1878 } 1879 #endif 1880 return res; 1881 } 1882 1883 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1884 { 1885 int result, idx; 1886 1887 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1888 for (idx = 0; idx < 2; idx++) { 1889 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1890 result = snd_pcm_oss_get_caps1(substream, result); 1891 } 1892 result |= 0x0001; /* revision - same as SB AWE 64 */ 1893 return result; 1894 } 1895 1896 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr) 1897 { 1898 struct snd_pcm_runtime *runtime = substream->runtime; 1899 snd_pcm_uframes_t appl_ptr; 1900 appl_ptr = hw_ptr + runtime->buffer_size; 1901 appl_ptr %= runtime->boundary; 1902 runtime->control->appl_ptr = appl_ptr; 1903 } 1904 1905 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1906 { 1907 struct snd_pcm_runtime *runtime; 1908 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1909 int err, cmd; 1910 1911 #ifdef OSS_DEBUG 1912 printk("pcm_oss: trigger = 0x%x\n", trigger); 1913 #endif 1914 1915 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1916 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1917 1918 if (psubstream) { 1919 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1920 return err; 1921 } 1922 if (csubstream) { 1923 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1924 return err; 1925 } 1926 if (psubstream) { 1927 runtime = psubstream->runtime; 1928 if (trigger & PCM_ENABLE_OUTPUT) { 1929 if (runtime->oss.trigger) 1930 goto _skip1; 1931 if (atomic_read(&psubstream->mmap_count)) 1932 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt); 1933 runtime->oss.trigger = 1; 1934 runtime->start_threshold = 1; 1935 cmd = SNDRV_PCM_IOCTL_START; 1936 } else { 1937 if (!runtime->oss.trigger) 1938 goto _skip1; 1939 runtime->oss.trigger = 0; 1940 runtime->start_threshold = runtime->boundary; 1941 cmd = SNDRV_PCM_IOCTL_DROP; 1942 runtime->oss.prepare = 1; 1943 } 1944 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 1945 if (err < 0) 1946 return err; 1947 } 1948 _skip1: 1949 if (csubstream) { 1950 runtime = csubstream->runtime; 1951 if (trigger & PCM_ENABLE_INPUT) { 1952 if (runtime->oss.trigger) 1953 goto _skip2; 1954 runtime->oss.trigger = 1; 1955 runtime->start_threshold = 1; 1956 cmd = SNDRV_PCM_IOCTL_START; 1957 } else { 1958 if (!runtime->oss.trigger) 1959 goto _skip2; 1960 runtime->oss.trigger = 0; 1961 runtime->start_threshold = runtime->boundary; 1962 cmd = SNDRV_PCM_IOCTL_DROP; 1963 runtime->oss.prepare = 1; 1964 } 1965 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 1966 if (err < 0) 1967 return err; 1968 } 1969 _skip2: 1970 return 0; 1971 } 1972 1973 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 1974 { 1975 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1976 int result = 0; 1977 1978 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1979 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1980 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 1981 result |= PCM_ENABLE_OUTPUT; 1982 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 1983 result |= PCM_ENABLE_INPUT; 1984 return result; 1985 } 1986 1987 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 1988 { 1989 struct snd_pcm_substream *substream; 1990 struct snd_pcm_runtime *runtime; 1991 snd_pcm_sframes_t delay; 1992 int err; 1993 1994 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1995 if (substream == NULL) 1996 return -EINVAL; 1997 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1998 return err; 1999 runtime = substream->runtime; 2000 if (runtime->oss.params || runtime->oss.prepare) 2001 return 0; 2002 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2003 if (err == -EPIPE) 2004 delay = 0; /* hack for broken OSS applications */ 2005 else if (err < 0) 2006 return err; 2007 return snd_pcm_oss_bytes(substream, delay); 2008 } 2009 2010 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2011 { 2012 struct snd_pcm_substream *substream; 2013 struct snd_pcm_runtime *runtime; 2014 snd_pcm_sframes_t delay; 2015 int fixup; 2016 struct count_info info; 2017 int err; 2018 2019 if (_info == NULL) 2020 return -EFAULT; 2021 substream = pcm_oss_file->streams[stream]; 2022 if (substream == NULL) 2023 return -EINVAL; 2024 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2025 return err; 2026 runtime = substream->runtime; 2027 if (runtime->oss.params || runtime->oss.prepare) { 2028 memset(&info, 0, sizeof(info)); 2029 if (copy_to_user(_info, &info, sizeof(info))) 2030 return -EFAULT; 2031 return 0; 2032 } 2033 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2034 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2035 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2036 err = 0; 2037 delay = 0; 2038 fixup = 0; 2039 } else { 2040 fixup = runtime->oss.buffer_used; 2041 } 2042 } else { 2043 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2044 fixup = -runtime->oss.buffer_used; 2045 } 2046 if (err < 0) 2047 return err; 2048 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2049 if (atomic_read(&substream->mmap_count)) { 2050 snd_pcm_sframes_t n; 2051 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt; 2052 if (n < 0) 2053 n += runtime->boundary; 2054 info.blocks = n / runtime->period_size; 2055 runtime->oss.prev_hw_ptr_interrupt = delay; 2056 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2057 snd_pcm_oss_simulate_fill(substream, delay); 2058 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2059 } else { 2060 delay = snd_pcm_oss_bytes(substream, delay); 2061 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2062 if (substream->oss.setup.buggyptr) 2063 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2064 else 2065 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2066 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2067 } else { 2068 delay += fixup; 2069 info.blocks = delay / runtime->oss.period_bytes; 2070 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2071 } 2072 } 2073 if (copy_to_user(_info, &info, sizeof(info))) 2074 return -EFAULT; 2075 return 0; 2076 } 2077 2078 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2079 { 2080 struct snd_pcm_substream *substream; 2081 struct snd_pcm_runtime *runtime; 2082 snd_pcm_sframes_t avail; 2083 int fixup; 2084 struct audio_buf_info info; 2085 int err; 2086 2087 if (_info == NULL) 2088 return -EFAULT; 2089 substream = pcm_oss_file->streams[stream]; 2090 if (substream == NULL) 2091 return -EINVAL; 2092 runtime = substream->runtime; 2093 2094 if (runtime->oss.params && 2095 (err = snd_pcm_oss_change_params(substream)) < 0) 2096 return err; 2097 2098 info.fragsize = runtime->oss.period_bytes; 2099 info.fragstotal = runtime->periods; 2100 if (runtime->oss.prepare) { 2101 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2102 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2103 info.fragments = runtime->oss.periods; 2104 } else { 2105 info.bytes = 0; 2106 info.fragments = 0; 2107 } 2108 } else { 2109 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2110 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2111 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2112 avail = runtime->buffer_size; 2113 err = 0; 2114 fixup = 0; 2115 } else { 2116 avail = runtime->buffer_size - avail; 2117 fixup = -runtime->oss.buffer_used; 2118 } 2119 } else { 2120 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2121 fixup = runtime->oss.buffer_used; 2122 } 2123 if (err < 0) 2124 return err; 2125 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2126 info.fragments = info.bytes / runtime->oss.period_bytes; 2127 } 2128 2129 #ifdef OSS_DEBUG 2130 printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize); 2131 #endif 2132 if (copy_to_user(_info, &info, sizeof(info))) 2133 return -EFAULT; 2134 return 0; 2135 } 2136 2137 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2138 { 2139 // it won't be probably implemented 2140 // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); 2141 return -EINVAL; 2142 } 2143 2144 static const char *strip_task_path(const char *path) 2145 { 2146 const char *ptr, *ptrl = NULL; 2147 for (ptr = path; *ptr; ptr++) { 2148 if (*ptr == '/') 2149 ptrl = ptr + 1; 2150 } 2151 return ptrl; 2152 } 2153 2154 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2155 const char *task_name, 2156 struct snd_pcm_oss_setup *rsetup) 2157 { 2158 struct snd_pcm_oss_setup *setup; 2159 2160 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2161 do { 2162 for (setup = pcm->streams[stream].oss.setup_list; setup; 2163 setup = setup->next) { 2164 if (!strcmp(setup->task_name, task_name)) 2165 goto out; 2166 } 2167 } while ((task_name = strip_task_path(task_name)) != NULL); 2168 out: 2169 if (setup) 2170 *rsetup = *setup; 2171 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2172 } 2173 2174 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2175 { 2176 struct snd_pcm_runtime *runtime; 2177 runtime = substream->runtime; 2178 vfree(runtime->oss.buffer); 2179 runtime->oss.buffer = NULL; 2180 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2181 snd_pcm_oss_plugin_clear(substream); 2182 #endif 2183 substream->oss.oss = 0; 2184 } 2185 2186 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2187 struct snd_pcm_oss_setup *setup, 2188 int minor) 2189 { 2190 struct snd_pcm_runtime *runtime; 2191 2192 substream->oss.oss = 1; 2193 substream->oss.setup = *setup; 2194 if (setup->nonblock) 2195 substream->f_flags |= O_NONBLOCK; 2196 else if (setup->block) 2197 substream->f_flags &= ~O_NONBLOCK; 2198 runtime = substream->runtime; 2199 runtime->oss.params = 1; 2200 runtime->oss.trigger = 1; 2201 runtime->oss.rate = 8000; 2202 mutex_init(&runtime->oss.params_lock); 2203 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2204 case SNDRV_MINOR_OSS_PCM_8: 2205 runtime->oss.format = AFMT_U8; 2206 break; 2207 case SNDRV_MINOR_OSS_PCM_16: 2208 runtime->oss.format = AFMT_S16_LE; 2209 break; 2210 default: 2211 runtime->oss.format = AFMT_MU_LAW; 2212 } 2213 runtime->oss.channels = 1; 2214 runtime->oss.fragshift = 0; 2215 runtime->oss.maxfrags = 0; 2216 runtime->oss.subdivision = 0; 2217 substream->pcm_release = snd_pcm_oss_release_substream; 2218 } 2219 2220 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2221 { 2222 int cidx; 2223 snd_assert(pcm_oss_file != NULL, return -ENXIO); 2224 for (cidx = 0; cidx < 2; ++cidx) { 2225 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2226 if (substream) 2227 snd_pcm_release_substream(substream); 2228 } 2229 kfree(pcm_oss_file); 2230 return 0; 2231 } 2232 2233 static int snd_pcm_oss_open_file(struct file *file, 2234 struct snd_pcm *pcm, 2235 struct snd_pcm_oss_file **rpcm_oss_file, 2236 int minor, 2237 struct snd_pcm_oss_setup *setup) 2238 { 2239 int idx, err; 2240 struct snd_pcm_oss_file *pcm_oss_file; 2241 struct snd_pcm_substream *substream; 2242 unsigned int f_mode = file->f_mode; 2243 2244 snd_assert(rpcm_oss_file != NULL, return -EINVAL); 2245 *rpcm_oss_file = NULL; 2246 2247 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2248 if (pcm_oss_file == NULL) 2249 return -ENOMEM; 2250 2251 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2252 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2253 f_mode = FMODE_WRITE; 2254 2255 file->f_flags &= ~O_APPEND; 2256 for (idx = 0; idx < 2; idx++) { 2257 if (setup[idx].disable) 2258 continue; 2259 if (! pcm->streams[idx].substream_count) 2260 continue; /* no matching substream */ 2261 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2262 if (! (f_mode & FMODE_WRITE)) 2263 continue; 2264 } else { 2265 if (! (f_mode & FMODE_READ)) 2266 continue; 2267 } 2268 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2269 if (err < 0) { 2270 snd_pcm_oss_release_file(pcm_oss_file); 2271 return err; 2272 } 2273 2274 pcm_oss_file->streams[idx] = substream; 2275 substream->file = pcm_oss_file; 2276 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2277 } 2278 2279 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2280 snd_pcm_oss_release_file(pcm_oss_file); 2281 return -EINVAL; 2282 } 2283 2284 file->private_data = pcm_oss_file; 2285 *rpcm_oss_file = pcm_oss_file; 2286 return 0; 2287 } 2288 2289 2290 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2291 { 2292 unsigned int idx; 2293 2294 snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL); 2295 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2296 name[idx] = task->comm[idx]; 2297 name[idx] = '\0'; 2298 return 0; 2299 } 2300 2301 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2302 { 2303 int err; 2304 char task_name[32]; 2305 struct snd_pcm *pcm; 2306 struct snd_pcm_oss_file *pcm_oss_file; 2307 struct snd_pcm_oss_setup setup[2]; 2308 int nonblock; 2309 wait_queue_t wait; 2310 2311 pcm = snd_lookup_oss_minor_data(iminor(inode), 2312 SNDRV_OSS_DEVICE_TYPE_PCM); 2313 if (pcm == NULL) { 2314 err = -ENODEV; 2315 goto __error1; 2316 } 2317 err = snd_card_file_add(pcm->card, file); 2318 if (err < 0) 2319 goto __error1; 2320 if (!try_module_get(pcm->card->module)) { 2321 err = -EFAULT; 2322 goto __error2; 2323 } 2324 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2325 err = -EFAULT; 2326 goto __error; 2327 } 2328 memset(setup, 0, sizeof(setup)); 2329 if (file->f_mode & FMODE_WRITE) 2330 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2331 task_name, &setup[0]); 2332 if (file->f_mode & FMODE_READ) 2333 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2334 task_name, &setup[1]); 2335 2336 nonblock = !!(file->f_flags & O_NONBLOCK); 2337 if (!nonblock) 2338 nonblock = nonblock_open; 2339 2340 init_waitqueue_entry(&wait, current); 2341 add_wait_queue(&pcm->open_wait, &wait); 2342 mutex_lock(&pcm->open_mutex); 2343 while (1) { 2344 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2345 iminor(inode), setup); 2346 if (err >= 0) 2347 break; 2348 if (err == -EAGAIN) { 2349 if (nonblock) { 2350 err = -EBUSY; 2351 break; 2352 } 2353 } else 2354 break; 2355 set_current_state(TASK_INTERRUPTIBLE); 2356 mutex_unlock(&pcm->open_mutex); 2357 schedule(); 2358 mutex_lock(&pcm->open_mutex); 2359 if (signal_pending(current)) { 2360 err = -ERESTARTSYS; 2361 break; 2362 } 2363 } 2364 remove_wait_queue(&pcm->open_wait, &wait); 2365 mutex_unlock(&pcm->open_mutex); 2366 if (err < 0) 2367 goto __error; 2368 return err; 2369 2370 __error: 2371 module_put(pcm->card->module); 2372 __error2: 2373 snd_card_file_remove(pcm->card, file); 2374 __error1: 2375 return err; 2376 } 2377 2378 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2379 { 2380 struct snd_pcm *pcm; 2381 struct snd_pcm_substream *substream; 2382 struct snd_pcm_oss_file *pcm_oss_file; 2383 2384 pcm_oss_file = file->private_data; 2385 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2386 if (substream == NULL) 2387 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2388 snd_assert(substream != NULL, return -ENXIO); 2389 pcm = substream->pcm; 2390 if (!pcm->card->shutdown) 2391 snd_pcm_oss_sync(pcm_oss_file); 2392 mutex_lock(&pcm->open_mutex); 2393 snd_pcm_oss_release_file(pcm_oss_file); 2394 mutex_unlock(&pcm->open_mutex); 2395 wake_up(&pcm->open_wait); 2396 module_put(pcm->card->module); 2397 snd_card_file_remove(pcm->card, file); 2398 return 0; 2399 } 2400 2401 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2402 { 2403 struct snd_pcm_oss_file *pcm_oss_file; 2404 int __user *p = (int __user *)arg; 2405 int res; 2406 2407 pcm_oss_file = file->private_data; 2408 if (cmd == OSS_GETVERSION) 2409 return put_user(SNDRV_OSS_VERSION, p); 2410 if (cmd == OSS_ALSAEMULVER) 2411 return put_user(1, p); 2412 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) 2413 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2414 struct snd_pcm_substream *substream; 2415 int idx; 2416 for (idx = 0; idx < 2; ++idx) { 2417 substream = pcm_oss_file->streams[idx]; 2418 if (substream != NULL) 2419 break; 2420 } 2421 snd_assert(substream != NULL, return -ENXIO); 2422 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2423 } 2424 #endif 2425 if (((cmd >> 8) & 0xff) != 'P') 2426 return -EINVAL; 2427 #ifdef OSS_DEBUG 2428 printk("pcm_oss: ioctl = 0x%x\n", cmd); 2429 #endif 2430 switch (cmd) { 2431 case SNDCTL_DSP_RESET: 2432 return snd_pcm_oss_reset(pcm_oss_file); 2433 case SNDCTL_DSP_SYNC: 2434 return snd_pcm_oss_sync(pcm_oss_file); 2435 case SNDCTL_DSP_SPEED: 2436 if (get_user(res, p)) 2437 return -EFAULT; 2438 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2439 return res; 2440 return put_user(res, p); 2441 case SOUND_PCM_READ_RATE: 2442 res = snd_pcm_oss_get_rate(pcm_oss_file); 2443 if (res < 0) 2444 return res; 2445 return put_user(res, p); 2446 case SNDCTL_DSP_STEREO: 2447 if (get_user(res, p)) 2448 return -EFAULT; 2449 res = res > 0 ? 2 : 1; 2450 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2451 return res; 2452 return put_user(--res, p); 2453 case SNDCTL_DSP_GETBLKSIZE: 2454 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2455 if (res < 0) 2456 return res; 2457 return put_user(res, p); 2458 case SNDCTL_DSP_SETFMT: 2459 if (get_user(res, p)) 2460 return -EFAULT; 2461 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2462 if (res < 0) 2463 return res; 2464 return put_user(res, p); 2465 case SOUND_PCM_READ_BITS: 2466 res = snd_pcm_oss_get_format(pcm_oss_file); 2467 if (res < 0) 2468 return res; 2469 return put_user(res, p); 2470 case SNDCTL_DSP_CHANNELS: 2471 if (get_user(res, p)) 2472 return -EFAULT; 2473 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2474 if (res < 0) 2475 return res; 2476 return put_user(res, p); 2477 case SOUND_PCM_READ_CHANNELS: 2478 res = snd_pcm_oss_get_channels(pcm_oss_file); 2479 if (res < 0) 2480 return res; 2481 return put_user(res, p); 2482 case SOUND_PCM_WRITE_FILTER: 2483 case SOUND_PCM_READ_FILTER: 2484 return -EIO; 2485 case SNDCTL_DSP_POST: 2486 return snd_pcm_oss_post(pcm_oss_file); 2487 case SNDCTL_DSP_SUBDIVIDE: 2488 if (get_user(res, p)) 2489 return -EFAULT; 2490 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2491 if (res < 0) 2492 return res; 2493 return put_user(res, p); 2494 case SNDCTL_DSP_SETFRAGMENT: 2495 if (get_user(res, p)) 2496 return -EFAULT; 2497 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2498 case SNDCTL_DSP_GETFMTS: 2499 res = snd_pcm_oss_get_formats(pcm_oss_file); 2500 if (res < 0) 2501 return res; 2502 return put_user(res, p); 2503 case SNDCTL_DSP_GETOSPACE: 2504 case SNDCTL_DSP_GETISPACE: 2505 return snd_pcm_oss_get_space(pcm_oss_file, 2506 cmd == SNDCTL_DSP_GETISPACE ? 2507 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2508 (struct audio_buf_info __user *) arg); 2509 case SNDCTL_DSP_NONBLOCK: 2510 return snd_pcm_oss_nonblock(file); 2511 case SNDCTL_DSP_GETCAPS: 2512 res = snd_pcm_oss_get_caps(pcm_oss_file); 2513 if (res < 0) 2514 return res; 2515 return put_user(res, p); 2516 case SNDCTL_DSP_GETTRIGGER: 2517 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2518 if (res < 0) 2519 return res; 2520 return put_user(res, p); 2521 case SNDCTL_DSP_SETTRIGGER: 2522 if (get_user(res, p)) 2523 return -EFAULT; 2524 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2525 case SNDCTL_DSP_GETIPTR: 2526 case SNDCTL_DSP_GETOPTR: 2527 return snd_pcm_oss_get_ptr(pcm_oss_file, 2528 cmd == SNDCTL_DSP_GETIPTR ? 2529 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2530 (struct count_info __user *) arg); 2531 case SNDCTL_DSP_MAPINBUF: 2532 case SNDCTL_DSP_MAPOUTBUF: 2533 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2534 cmd == SNDCTL_DSP_MAPINBUF ? 2535 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2536 (struct buffmem_desc __user *) arg); 2537 case SNDCTL_DSP_SETSYNCRO: 2538 /* stop DMA now.. */ 2539 return 0; 2540 case SNDCTL_DSP_SETDUPLEX: 2541 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2542 return 0; 2543 return -EIO; 2544 case SNDCTL_DSP_GETODELAY: 2545 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2546 if (res < 0) { 2547 /* it's for sure, some broken apps don't check for error codes */ 2548 put_user(0, p); 2549 return res; 2550 } 2551 return put_user(res, p); 2552 case SNDCTL_DSP_PROFILE: 2553 return 0; /* silently ignore */ 2554 default: 2555 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); 2556 } 2557 return -EINVAL; 2558 } 2559 2560 #ifdef CONFIG_COMPAT 2561 /* all compatible */ 2562 #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl 2563 #else 2564 #define snd_pcm_oss_ioctl_compat NULL 2565 #endif 2566 2567 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2568 { 2569 struct snd_pcm_oss_file *pcm_oss_file; 2570 struct snd_pcm_substream *substream; 2571 2572 pcm_oss_file = file->private_data; 2573 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2574 if (substream == NULL) 2575 return -ENXIO; 2576 substream->f_flags = file->f_flags & O_NONBLOCK; 2577 #ifndef OSS_DEBUG 2578 return snd_pcm_oss_read1(substream, buf, count); 2579 #else 2580 { 2581 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2582 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res); 2583 return res; 2584 } 2585 #endif 2586 } 2587 2588 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2589 { 2590 struct snd_pcm_oss_file *pcm_oss_file; 2591 struct snd_pcm_substream *substream; 2592 long result; 2593 2594 pcm_oss_file = file->private_data; 2595 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2596 if (substream == NULL) 2597 return -ENXIO; 2598 substream->f_flags = file->f_flags & O_NONBLOCK; 2599 result = snd_pcm_oss_write1(substream, buf, count); 2600 #ifdef OSS_DEBUG 2601 printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result); 2602 #endif 2603 return result; 2604 } 2605 2606 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2607 { 2608 struct snd_pcm_runtime *runtime = substream->runtime; 2609 if (atomic_read(&substream->mmap_count)) 2610 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2611 else 2612 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames; 2613 } 2614 2615 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2616 { 2617 struct snd_pcm_runtime *runtime = substream->runtime; 2618 if (atomic_read(&substream->mmap_count)) 2619 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; 2620 else 2621 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames; 2622 } 2623 2624 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2625 { 2626 struct snd_pcm_oss_file *pcm_oss_file; 2627 unsigned int mask; 2628 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2629 2630 pcm_oss_file = file->private_data; 2631 2632 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2633 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2634 2635 mask = 0; 2636 if (psubstream != NULL) { 2637 struct snd_pcm_runtime *runtime = psubstream->runtime; 2638 poll_wait(file, &runtime->sleep, wait); 2639 snd_pcm_stream_lock_irq(psubstream); 2640 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2641 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2642 snd_pcm_oss_playback_ready(psubstream))) 2643 mask |= POLLOUT | POLLWRNORM; 2644 snd_pcm_stream_unlock_irq(psubstream); 2645 } 2646 if (csubstream != NULL) { 2647 struct snd_pcm_runtime *runtime = csubstream->runtime; 2648 snd_pcm_state_t ostate; 2649 poll_wait(file, &runtime->sleep, wait); 2650 snd_pcm_stream_lock_irq(csubstream); 2651 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2652 snd_pcm_oss_capture_ready(csubstream)) 2653 mask |= POLLIN | POLLRDNORM; 2654 snd_pcm_stream_unlock_irq(csubstream); 2655 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2656 struct snd_pcm_oss_file ofile; 2657 memset(&ofile, 0, sizeof(ofile)); 2658 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2659 runtime->oss.trigger = 0; 2660 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2661 } 2662 } 2663 2664 return mask; 2665 } 2666 2667 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2668 { 2669 struct snd_pcm_oss_file *pcm_oss_file; 2670 struct snd_pcm_substream *substream = NULL; 2671 struct snd_pcm_runtime *runtime; 2672 int err; 2673 2674 #ifdef OSS_DEBUG 2675 printk("pcm_oss: mmap begin\n"); 2676 #endif 2677 pcm_oss_file = file->private_data; 2678 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2679 case VM_READ | VM_WRITE: 2680 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2681 if (substream) 2682 break; 2683 /* Fall through */ 2684 case VM_READ: 2685 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2686 break; 2687 case VM_WRITE: 2688 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2689 break; 2690 default: 2691 return -EINVAL; 2692 } 2693 /* set VM_READ access as well to fix memset() routines that do 2694 reads before writes (to improve performance) */ 2695 area->vm_flags |= VM_READ; 2696 if (substream == NULL) 2697 return -ENXIO; 2698 runtime = substream->runtime; 2699 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2700 return -EIO; 2701 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2702 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2703 else 2704 return -EIO; 2705 2706 if (runtime->oss.params) { 2707 if ((err = snd_pcm_oss_change_params(substream)) < 0) 2708 return err; 2709 } 2710 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2711 if (runtime->oss.plugin_first != NULL) 2712 return -EIO; 2713 #endif 2714 2715 if (area->vm_pgoff != 0) 2716 return -EINVAL; 2717 2718 err = snd_pcm_mmap_data(substream, file, area); 2719 if (err < 0) 2720 return err; 2721 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2722 runtime->silence_threshold = 0; 2723 runtime->silence_size = 0; 2724 #ifdef OSS_DEBUG 2725 printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes); 2726 #endif 2727 /* In mmap mode we never stop */ 2728 runtime->stop_threshold = runtime->boundary; 2729 2730 return 0; 2731 } 2732 2733 #ifdef CONFIG_SND_VERBOSE_PROCFS 2734 /* 2735 * /proc interface 2736 */ 2737 2738 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2739 struct snd_info_buffer *buffer) 2740 { 2741 struct snd_pcm_str *pstr = entry->private_data; 2742 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2743 mutex_lock(&pstr->oss.setup_mutex); 2744 while (setup) { 2745 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2746 setup->task_name, 2747 setup->periods, 2748 setup->period_size, 2749 setup->disable ? " disable" : "", 2750 setup->direct ? " direct" : "", 2751 setup->block ? " block" : "", 2752 setup->nonblock ? " non-block" : "", 2753 setup->partialfrag ? " partial-frag" : "", 2754 setup->nosilence ? " no-silence" : ""); 2755 setup = setup->next; 2756 } 2757 mutex_unlock(&pstr->oss.setup_mutex); 2758 } 2759 2760 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2761 { 2762 struct snd_pcm_oss_setup *setup, *setupn; 2763 2764 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2765 setup; setup = setupn) { 2766 setupn = setup->next; 2767 kfree(setup->task_name); 2768 kfree(setup); 2769 } 2770 pstr->oss.setup_list = NULL; 2771 } 2772 2773 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2774 struct snd_info_buffer *buffer) 2775 { 2776 struct snd_pcm_str *pstr = entry->private_data; 2777 char line[128], str[32], task_name[32], *ptr; 2778 int idx1; 2779 struct snd_pcm_oss_setup *setup, *setup1, template; 2780 2781 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2782 mutex_lock(&pstr->oss.setup_mutex); 2783 memset(&template, 0, sizeof(template)); 2784 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2785 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2786 snd_pcm_oss_proc_free_setup_list(pstr); 2787 mutex_unlock(&pstr->oss.setup_mutex); 2788 continue; 2789 } 2790 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2791 if (!strcmp(setup->task_name, task_name)) { 2792 template = *setup; 2793 break; 2794 } 2795 } 2796 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2797 template.periods = simple_strtoul(str, NULL, 10); 2798 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2799 template.period_size = simple_strtoul(str, NULL, 10); 2800 for (idx1 = 31; idx1 >= 0; idx1--) 2801 if (template.period_size & (1 << idx1)) 2802 break; 2803 for (idx1--; idx1 >= 0; idx1--) 2804 template.period_size &= ~(1 << idx1); 2805 do { 2806 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2807 if (!strcmp(str, "disable")) { 2808 template.disable = 1; 2809 } else if (!strcmp(str, "direct")) { 2810 template.direct = 1; 2811 } else if (!strcmp(str, "block")) { 2812 template.block = 1; 2813 } else if (!strcmp(str, "non-block")) { 2814 template.nonblock = 1; 2815 } else if (!strcmp(str, "partial-frag")) { 2816 template.partialfrag = 1; 2817 } else if (!strcmp(str, "no-silence")) { 2818 template.nosilence = 1; 2819 } else if (!strcmp(str, "buggy-ptr")) { 2820 template.buggyptr = 1; 2821 } 2822 } while (*str); 2823 if (setup == NULL) { 2824 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2825 if (! setup) { 2826 buffer->error = -ENOMEM; 2827 mutex_lock(&pstr->oss.setup_mutex); 2828 return; 2829 } 2830 if (pstr->oss.setup_list == NULL) 2831 pstr->oss.setup_list = setup; 2832 else { 2833 for (setup1 = pstr->oss.setup_list; 2834 setup1->next; setup1 = setup1->next); 2835 setup1->next = setup; 2836 } 2837 template.task_name = kstrdup(task_name, GFP_KERNEL); 2838 if (! template.task_name) { 2839 kfree(setup); 2840 buffer->error = -ENOMEM; 2841 mutex_lock(&pstr->oss.setup_mutex); 2842 return; 2843 } 2844 } 2845 *setup = template; 2846 mutex_unlock(&pstr->oss.setup_mutex); 2847 } 2848 } 2849 2850 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2851 { 2852 int stream; 2853 for (stream = 0; stream < 2; ++stream) { 2854 struct snd_info_entry *entry; 2855 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2856 if (pstr->substream_count == 0) 2857 continue; 2858 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2859 entry->content = SNDRV_INFO_CONTENT_TEXT; 2860 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2861 entry->c.text.read = snd_pcm_oss_proc_read; 2862 entry->c.text.write = snd_pcm_oss_proc_write; 2863 entry->private_data = pstr; 2864 if (snd_info_register(entry) < 0) { 2865 snd_info_free_entry(entry); 2866 entry = NULL; 2867 } 2868 } 2869 pstr->oss.proc_entry = entry; 2870 } 2871 } 2872 2873 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2874 { 2875 int stream; 2876 for (stream = 0; stream < 2; ++stream) { 2877 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2878 snd_info_free_entry(pstr->oss.proc_entry); 2879 pstr->oss.proc_entry = NULL; 2880 snd_pcm_oss_proc_free_setup_list(pstr); 2881 } 2882 } 2883 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2884 #define snd_pcm_oss_proc_init(pcm) 2885 #define snd_pcm_oss_proc_done(pcm) 2886 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2887 2888 /* 2889 * ENTRY functions 2890 */ 2891 2892 static const struct file_operations snd_pcm_oss_f_reg = 2893 { 2894 .owner = THIS_MODULE, 2895 .read = snd_pcm_oss_read, 2896 .write = snd_pcm_oss_write, 2897 .open = snd_pcm_oss_open, 2898 .release = snd_pcm_oss_release, 2899 .poll = snd_pcm_oss_poll, 2900 .unlocked_ioctl = snd_pcm_oss_ioctl, 2901 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2902 .mmap = snd_pcm_oss_mmap, 2903 }; 2904 2905 static void register_oss_dsp(struct snd_pcm *pcm, int index) 2906 { 2907 char name[128]; 2908 sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); 2909 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2910 pcm->card, index, &snd_pcm_oss_f_reg, 2911 pcm, name) < 0) { 2912 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n", 2913 pcm->card->number, pcm->device); 2914 } 2915 } 2916 2917 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 2918 { 2919 pcm->oss.reg = 0; 2920 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2921 char name[128]; 2922 int duplex; 2923 register_oss_dsp(pcm, 0); 2924 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 2925 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 2926 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 2927 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 2928 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2929 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 2930 pcm->card->number, 2931 name); 2932 #endif 2933 pcm->oss.reg++; 2934 pcm->oss.reg_mask |= 1; 2935 } 2936 if (adsp_map[pcm->card->number] == (int)pcm->device) { 2937 register_oss_dsp(pcm, 1); 2938 pcm->oss.reg++; 2939 pcm->oss.reg_mask |= 2; 2940 } 2941 2942 if (pcm->oss.reg) 2943 snd_pcm_oss_proc_init(pcm); 2944 2945 return 0; 2946 } 2947 2948 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 2949 { 2950 if (pcm->oss.reg) { 2951 if (pcm->oss.reg_mask & 1) { 2952 pcm->oss.reg_mask &= ~1; 2953 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2954 pcm->card, 0); 2955 } 2956 if (pcm->oss.reg_mask & 2) { 2957 pcm->oss.reg_mask &= ~2; 2958 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2959 pcm->card, 1); 2960 } 2961 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2962 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2963 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 2964 #endif 2965 } 2966 pcm->oss.reg = 0; 2967 } 2968 return 0; 2969 } 2970 2971 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 2972 { 2973 snd_pcm_oss_disconnect_minor(pcm); 2974 snd_pcm_oss_proc_done(pcm); 2975 return 0; 2976 } 2977 2978 static struct snd_pcm_notify snd_pcm_oss_notify = 2979 { 2980 .n_register = snd_pcm_oss_register_minor, 2981 .n_disconnect = snd_pcm_oss_disconnect_minor, 2982 .n_unregister = snd_pcm_oss_unregister_minor, 2983 }; 2984 2985 static int __init alsa_pcm_oss_init(void) 2986 { 2987 int i; 2988 int err; 2989 2990 /* check device map table */ 2991 for (i = 0; i < SNDRV_CARDS; i++) { 2992 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 2993 snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n", 2994 i, dsp_map[i]); 2995 dsp_map[i] = 0; 2996 } 2997 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 2998 snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n", 2999 i, adsp_map[i]); 3000 adsp_map[i] = 1; 3001 } 3002 } 3003 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3004 return err; 3005 return 0; 3006 } 3007 3008 static void __exit alsa_pcm_oss_exit(void) 3009 { 3010 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3011 } 3012 3013 module_init(alsa_pcm_oss_init) 3014 module_exit(alsa_pcm_oss_exit) 3015