1 /* 2 * Digital Audio (PCM) abstract layer / OSS compatible 3 * Copyright (c) by Jaroslav Kysela <perex@perex.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 <linux/init.h> 30 #include <linux/slab.h> 31 #include <linux/sched/signal.h> 32 #include <linux/time.h> 33 #include <linux/vmalloc.h> 34 #include <linux/module.h> 35 #include <linux/math64.h> 36 #include <linux/string.h> 37 #include <linux/compat.h> 38 #include <sound/core.h> 39 #include <sound/minors.h> 40 #include <sound/pcm.h> 41 #include <sound/pcm_params.h> 42 #include "pcm_plugin.h" 43 #include <sound/info.h> 44 #include <linux/soundcard.h> 45 #include <sound/initval.h> 46 #include <sound/mixer_oss.h> 47 48 #define OSS_ALSAEMULVER _SIOR ('M', 249, int) 49 50 static int dsp_map[SNDRV_CARDS]; 51 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; 52 static bool nonblock_open = 1; 53 54 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); 55 MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); 56 MODULE_LICENSE("GPL"); 57 module_param_array(dsp_map, int, NULL, 0444); 58 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); 59 module_param_array(adsp_map, int, NULL, 0444); 60 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); 61 module_param(nonblock_open, bool, 0644); 62 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); 63 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); 64 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); 65 66 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file); 67 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file); 68 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file); 69 70 /* 71 * helper functions to process hw_params 72 */ 73 static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin) 74 { 75 int changed = 0; 76 if (i->min < min) { 77 i->min = min; 78 i->openmin = openmin; 79 changed = 1; 80 } else if (i->min == min && !i->openmin && openmin) { 81 i->openmin = 1; 82 changed = 1; 83 } 84 if (i->integer) { 85 if (i->openmin) { 86 i->min++; 87 i->openmin = 0; 88 } 89 } 90 if (snd_interval_checkempty(i)) { 91 snd_interval_none(i); 92 return -EINVAL; 93 } 94 return changed; 95 } 96 97 static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax) 98 { 99 int changed = 0; 100 if (i->max > max) { 101 i->max = max; 102 i->openmax = openmax; 103 changed = 1; 104 } else if (i->max == max && !i->openmax && openmax) { 105 i->openmax = 1; 106 changed = 1; 107 } 108 if (i->integer) { 109 if (i->openmax) { 110 i->max--; 111 i->openmax = 0; 112 } 113 } 114 if (snd_interval_checkempty(i)) { 115 snd_interval_none(i); 116 return -EINVAL; 117 } 118 return changed; 119 } 120 121 static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) 122 { 123 struct snd_interval t; 124 t.empty = 0; 125 t.min = t.max = val; 126 t.openmin = t.openmax = 0; 127 t.integer = 1; 128 return snd_interval_refine(i, &t); 129 } 130 131 /** 132 * snd_pcm_hw_param_value_min 133 * @params: the hw_params instance 134 * @var: parameter to retrieve 135 * @dir: pointer to the direction (-1,0,1) or NULL 136 * 137 * Return the minimum value for field PAR. 138 */ 139 static unsigned int 140 snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params, 141 snd_pcm_hw_param_t var, int *dir) 142 { 143 if (hw_is_mask(var)) { 144 if (dir) 145 *dir = 0; 146 return snd_mask_min(hw_param_mask_c(params, var)); 147 } 148 if (hw_is_interval(var)) { 149 const struct snd_interval *i = hw_param_interval_c(params, var); 150 if (dir) 151 *dir = i->openmin; 152 return snd_interval_min(i); 153 } 154 return -EINVAL; 155 } 156 157 /** 158 * snd_pcm_hw_param_value_max 159 * @params: the hw_params instance 160 * @var: parameter to retrieve 161 * @dir: pointer to the direction (-1,0,1) or NULL 162 * 163 * Return the maximum value for field PAR. 164 */ 165 static unsigned int 166 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params, 167 snd_pcm_hw_param_t var, int *dir) 168 { 169 if (hw_is_mask(var)) { 170 if (dir) 171 *dir = 0; 172 return snd_mask_max(hw_param_mask_c(params, var)); 173 } 174 if (hw_is_interval(var)) { 175 const struct snd_interval *i = hw_param_interval_c(params, var); 176 if (dir) 177 *dir = - (int) i->openmax; 178 return snd_interval_max(i); 179 } 180 return -EINVAL; 181 } 182 183 static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params, 184 snd_pcm_hw_param_t var, 185 const struct snd_mask *val) 186 { 187 int changed; 188 changed = snd_mask_refine(hw_param_mask(params, var), val); 189 if (changed) { 190 params->cmask |= 1 << var; 191 params->rmask |= 1 << var; 192 } 193 return changed; 194 } 195 196 static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, 197 struct snd_pcm_hw_params *params, 198 snd_pcm_hw_param_t var, 199 const struct snd_mask *val) 200 { 201 int changed = _snd_pcm_hw_param_mask(params, var, val); 202 if (changed < 0) 203 return changed; 204 if (params->rmask) { 205 int err = snd_pcm_hw_refine(pcm, params); 206 if (err < 0) 207 return err; 208 } 209 return 0; 210 } 211 212 static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params, 213 snd_pcm_hw_param_t var, unsigned int val, 214 int dir) 215 { 216 int changed; 217 int open = 0; 218 if (dir) { 219 if (dir > 0) { 220 open = 1; 221 } else if (dir < 0) { 222 if (val > 0) { 223 open = 1; 224 val--; 225 } 226 } 227 } 228 if (hw_is_mask(var)) 229 changed = snd_mask_refine_min(hw_param_mask(params, var), 230 val + !!open); 231 else if (hw_is_interval(var)) 232 changed = snd_interval_refine_min(hw_param_interval(params, var), 233 val, open); 234 else 235 return -EINVAL; 236 if (changed) { 237 params->cmask |= 1 << var; 238 params->rmask |= 1 << var; 239 } 240 return changed; 241 } 242 243 /** 244 * snd_pcm_hw_param_min 245 * @pcm: PCM instance 246 * @params: the hw_params instance 247 * @var: parameter to retrieve 248 * @val: minimal value 249 * @dir: pointer to the direction (-1,0,1) or NULL 250 * 251 * Inside configuration space defined by PARAMS remove from PAR all 252 * values < VAL. Reduce configuration space accordingly. 253 * Return new minimum or -EINVAL if the configuration space is empty 254 */ 255 static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, 256 struct snd_pcm_hw_params *params, 257 snd_pcm_hw_param_t var, unsigned int val, 258 int *dir) 259 { 260 int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0); 261 if (changed < 0) 262 return changed; 263 if (params->rmask) { 264 int err = snd_pcm_hw_refine(pcm, params); 265 if (err < 0) 266 return err; 267 } 268 return snd_pcm_hw_param_value_min(params, var, dir); 269 } 270 271 static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params, 272 snd_pcm_hw_param_t var, unsigned int val, 273 int dir) 274 { 275 int changed; 276 int open = 0; 277 if (dir) { 278 if (dir < 0) { 279 open = 1; 280 } else if (dir > 0) { 281 open = 1; 282 val++; 283 } 284 } 285 if (hw_is_mask(var)) { 286 if (val == 0 && open) { 287 snd_mask_none(hw_param_mask(params, var)); 288 changed = -EINVAL; 289 } else 290 changed = snd_mask_refine_max(hw_param_mask(params, var), 291 val - !!open); 292 } else if (hw_is_interval(var)) 293 changed = snd_interval_refine_max(hw_param_interval(params, var), 294 val, open); 295 else 296 return -EINVAL; 297 if (changed) { 298 params->cmask |= 1 << var; 299 params->rmask |= 1 << var; 300 } 301 return changed; 302 } 303 304 /** 305 * snd_pcm_hw_param_max 306 * @pcm: PCM instance 307 * @params: the hw_params instance 308 * @var: parameter to retrieve 309 * @val: maximal value 310 * @dir: pointer to the direction (-1,0,1) or NULL 311 * 312 * Inside configuration space defined by PARAMS remove from PAR all 313 * values >= VAL + 1. Reduce configuration space accordingly. 314 * Return new maximum or -EINVAL if the configuration space is empty 315 */ 316 static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, 317 struct snd_pcm_hw_params *params, 318 snd_pcm_hw_param_t var, unsigned int val, 319 int *dir) 320 { 321 int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0); 322 if (changed < 0) 323 return changed; 324 if (params->rmask) { 325 int err = snd_pcm_hw_refine(pcm, params); 326 if (err < 0) 327 return err; 328 } 329 return snd_pcm_hw_param_value_max(params, var, dir); 330 } 331 332 static int boundary_sub(int a, int adir, 333 int b, int bdir, 334 int *c, int *cdir) 335 { 336 adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0); 337 bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0); 338 *c = a - b; 339 *cdir = adir - bdir; 340 if (*cdir == -2) { 341 (*c)--; 342 } else if (*cdir == 2) { 343 (*c)++; 344 } 345 return 0; 346 } 347 348 static int boundary_lt(unsigned int a, int adir, 349 unsigned int b, int bdir) 350 { 351 if (adir < 0) { 352 a--; 353 adir = 1; 354 } else if (adir > 0) 355 adir = 1; 356 if (bdir < 0) { 357 b--; 358 bdir = 1; 359 } else if (bdir > 0) 360 bdir = 1; 361 return a < b || (a == b && adir < bdir); 362 } 363 364 /* Return 1 if min is nearer to best than max */ 365 static int boundary_nearer(int min, int mindir, 366 int best, int bestdir, 367 int max, int maxdir) 368 { 369 int dmin, dmindir; 370 int dmax, dmaxdir; 371 boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir); 372 boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir); 373 return boundary_lt(dmin, dmindir, dmax, dmaxdir); 374 } 375 376 /** 377 * snd_pcm_hw_param_near 378 * @pcm: PCM instance 379 * @params: the hw_params instance 380 * @var: parameter to retrieve 381 * @best: value to set 382 * @dir: pointer to the direction (-1,0,1) or NULL 383 * 384 * Inside configuration space defined by PARAMS set PAR to the available value 385 * nearest to VAL. Reduce configuration space accordingly. 386 * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS, 387 * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT. 388 * Return the value found. 389 */ 390 static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, 391 struct snd_pcm_hw_params *params, 392 snd_pcm_hw_param_t var, unsigned int best, 393 int *dir) 394 { 395 struct snd_pcm_hw_params *save = NULL; 396 int v; 397 unsigned int saved_min; 398 int last = 0; 399 int min, max; 400 int mindir, maxdir; 401 int valdir = dir ? *dir : 0; 402 /* FIXME */ 403 if (best > INT_MAX) 404 best = INT_MAX; 405 min = max = best; 406 mindir = maxdir = valdir; 407 if (maxdir > 0) 408 maxdir = 0; 409 else if (maxdir == 0) 410 maxdir = -1; 411 else { 412 maxdir = 1; 413 max--; 414 } 415 save = kmalloc(sizeof(*save), GFP_KERNEL); 416 if (save == NULL) 417 return -ENOMEM; 418 *save = *params; 419 saved_min = min; 420 min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir); 421 if (min >= 0) { 422 struct snd_pcm_hw_params *params1; 423 if (max < 0) 424 goto _end; 425 if ((unsigned int)min == saved_min && mindir == valdir) 426 goto _end; 427 params1 = kmalloc(sizeof(*params1), GFP_KERNEL); 428 if (params1 == NULL) { 429 kfree(save); 430 return -ENOMEM; 431 } 432 *params1 = *save; 433 max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir); 434 if (max < 0) { 435 kfree(params1); 436 goto _end; 437 } 438 if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) { 439 *params = *params1; 440 last = 1; 441 } 442 kfree(params1); 443 } else { 444 *params = *save; 445 max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir); 446 if (max < 0) { 447 kfree(save); 448 return max; 449 } 450 last = 1; 451 } 452 _end: 453 kfree(save); 454 if (last) 455 v = snd_pcm_hw_param_last(pcm, params, var, dir); 456 else 457 v = snd_pcm_hw_param_first(pcm, params, var, dir); 458 snd_BUG_ON(v < 0); 459 return v; 460 } 461 462 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 463 snd_pcm_hw_param_t var, unsigned int val, 464 int dir) 465 { 466 int changed; 467 if (hw_is_mask(var)) { 468 struct snd_mask *m = hw_param_mask(params, var); 469 if (val == 0 && dir < 0) { 470 changed = -EINVAL; 471 snd_mask_none(m); 472 } else { 473 if (dir > 0) 474 val++; 475 else if (dir < 0) 476 val--; 477 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 478 } 479 } else if (hw_is_interval(var)) { 480 struct snd_interval *i = hw_param_interval(params, var); 481 if (val == 0 && dir < 0) { 482 changed = -EINVAL; 483 snd_interval_none(i); 484 } else if (dir == 0) 485 changed = snd_interval_refine_set(i, val); 486 else { 487 struct snd_interval t; 488 t.openmin = 1; 489 t.openmax = 1; 490 t.empty = 0; 491 t.integer = 0; 492 if (dir < 0) { 493 t.min = val - 1; 494 t.max = val; 495 } else { 496 t.min = val; 497 t.max = val+1; 498 } 499 changed = snd_interval_refine(i, &t); 500 } 501 } else 502 return -EINVAL; 503 if (changed) { 504 params->cmask |= 1 << var; 505 params->rmask |= 1 << var; 506 } 507 return changed; 508 } 509 510 /** 511 * snd_pcm_hw_param_set 512 * @pcm: PCM instance 513 * @params: the hw_params instance 514 * @var: parameter to retrieve 515 * @val: value to set 516 * @dir: pointer to the direction (-1,0,1) or NULL 517 * 518 * Inside configuration space defined by PARAMS remove from PAR all 519 * values != VAL. Reduce configuration space accordingly. 520 * Return VAL or -EINVAL if the configuration space is empty 521 */ 522 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 523 struct snd_pcm_hw_params *params, 524 snd_pcm_hw_param_t var, unsigned int val, 525 int dir) 526 { 527 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 528 if (changed < 0) 529 return changed; 530 if (params->rmask) { 531 int err = snd_pcm_hw_refine(pcm, params); 532 if (err < 0) 533 return err; 534 } 535 return snd_pcm_hw_param_value(params, var, NULL); 536 } 537 538 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 539 snd_pcm_hw_param_t var) 540 { 541 int changed; 542 changed = snd_interval_setinteger(hw_param_interval(params, var)); 543 if (changed) { 544 params->cmask |= 1 << var; 545 params->rmask |= 1 << var; 546 } 547 return changed; 548 } 549 550 /* 551 * plugin 552 */ 553 554 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 555 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 556 { 557 struct snd_pcm_runtime *runtime = substream->runtime; 558 struct snd_pcm_plugin *plugin, *next; 559 560 plugin = runtime->oss.plugin_first; 561 while (plugin) { 562 next = plugin->next; 563 snd_pcm_plugin_free(plugin); 564 plugin = next; 565 } 566 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 567 return 0; 568 } 569 570 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 571 { 572 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 573 plugin->next = runtime->oss.plugin_first; 574 plugin->prev = NULL; 575 if (runtime->oss.plugin_first) { 576 runtime->oss.plugin_first->prev = plugin; 577 runtime->oss.plugin_first = plugin; 578 } else { 579 runtime->oss.plugin_last = 580 runtime->oss.plugin_first = plugin; 581 } 582 return 0; 583 } 584 585 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 586 { 587 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 588 plugin->next = NULL; 589 plugin->prev = runtime->oss.plugin_last; 590 if (runtime->oss.plugin_last) { 591 runtime->oss.plugin_last->next = plugin; 592 runtime->oss.plugin_last = plugin; 593 } else { 594 runtime->oss.plugin_last = 595 runtime->oss.plugin_first = plugin; 596 } 597 return 0; 598 } 599 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 600 601 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 602 { 603 struct snd_pcm_runtime *runtime = substream->runtime; 604 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 605 long bytes = frames_to_bytes(runtime, frames); 606 if (buffer_size == runtime->oss.buffer_bytes) 607 return bytes; 608 #if BITS_PER_LONG >= 64 609 return runtime->oss.buffer_bytes * bytes / buffer_size; 610 #else 611 { 612 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 613 return div_u64(bsize, buffer_size); 614 } 615 #endif 616 } 617 618 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 619 { 620 struct snd_pcm_runtime *runtime = substream->runtime; 621 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 622 if (buffer_size == runtime->oss.buffer_bytes) 623 return bytes_to_frames(runtime, bytes); 624 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 625 } 626 627 static inline 628 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 629 { 630 return runtime->hw_ptr_interrupt; 631 } 632 633 /* define extended formats in the recent OSS versions (if any) */ 634 /* linear formats */ 635 #define AFMT_S32_LE 0x00001000 636 #define AFMT_S32_BE 0x00002000 637 #define AFMT_S24_LE 0x00008000 638 #define AFMT_S24_BE 0x00010000 639 #define AFMT_S24_PACKED 0x00040000 640 641 /* other supported formats */ 642 #define AFMT_FLOAT 0x00004000 643 #define AFMT_SPDIF_RAW 0x00020000 644 645 /* unsupported formats */ 646 #define AFMT_AC3 0x00000400 647 #define AFMT_VORBIS 0x00000800 648 649 static snd_pcm_format_t snd_pcm_oss_format_from(int format) 650 { 651 switch (format) { 652 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 653 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 654 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 655 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 656 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 657 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 658 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 659 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 660 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 661 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 662 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 663 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 664 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 665 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 666 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 667 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 668 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 669 default: return SNDRV_PCM_FORMAT_U8; 670 } 671 } 672 673 static int snd_pcm_oss_format_to(snd_pcm_format_t format) 674 { 675 switch (format) { 676 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 677 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 678 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 679 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 680 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 681 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 682 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 683 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 684 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 685 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 686 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 687 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 688 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 689 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 690 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 691 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 692 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 693 default: return -EINVAL; 694 } 695 } 696 697 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 698 struct snd_pcm_hw_params *oss_params, 699 struct snd_pcm_hw_params *slave_params) 700 { 701 size_t s; 702 size_t oss_buffer_size, oss_period_size, oss_periods; 703 size_t min_period_size, max_period_size; 704 struct snd_pcm_runtime *runtime = substream->runtime; 705 size_t oss_frame_size; 706 707 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 708 params_channels(oss_params) / 8; 709 710 oss_buffer_size = snd_pcm_plug_client_size(substream, 711 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 712 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 713 if (atomic_read(&substream->mmap_count)) { 714 if (oss_buffer_size > runtime->oss.mmap_bytes) 715 oss_buffer_size = runtime->oss.mmap_bytes; 716 } 717 718 if (substream->oss.setup.period_size > 16) 719 oss_period_size = substream->oss.setup.period_size; 720 else if (runtime->oss.fragshift) { 721 oss_period_size = 1 << runtime->oss.fragshift; 722 if (oss_period_size > oss_buffer_size / 2) 723 oss_period_size = oss_buffer_size / 2; 724 } else { 725 int sd; 726 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 727 728 oss_period_size = oss_buffer_size; 729 do { 730 oss_period_size /= 2; 731 } while (oss_period_size > bytes_per_sec); 732 if (runtime->oss.subdivision == 0) { 733 sd = 4; 734 if (oss_period_size / sd > 4096) 735 sd *= 2; 736 if (oss_period_size / sd < 4096) 737 sd = 1; 738 } else 739 sd = runtime->oss.subdivision; 740 oss_period_size /= sd; 741 if (oss_period_size < 16) 742 oss_period_size = 16; 743 } 744 745 min_period_size = snd_pcm_plug_client_size(substream, 746 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 747 min_period_size *= oss_frame_size; 748 min_period_size = roundup_pow_of_two(min_period_size); 749 if (oss_period_size < min_period_size) 750 oss_period_size = min_period_size; 751 752 max_period_size = snd_pcm_plug_client_size(substream, 753 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 754 max_period_size *= oss_frame_size; 755 max_period_size = rounddown_pow_of_two(max_period_size); 756 if (oss_period_size > max_period_size) 757 oss_period_size = max_period_size; 758 759 oss_periods = oss_buffer_size / oss_period_size; 760 761 if (substream->oss.setup.periods > 1) 762 oss_periods = substream->oss.setup.periods; 763 764 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 765 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 766 s = runtime->oss.maxfrags; 767 if (oss_periods > s) 768 oss_periods = s; 769 770 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 771 if (s < 2) 772 s = 2; 773 if (oss_periods < s) 774 oss_periods = s; 775 776 while (oss_period_size * oss_periods > oss_buffer_size) 777 oss_period_size /= 2; 778 779 if (oss_period_size < 16) 780 return -EINVAL; 781 runtime->oss.period_bytes = oss_period_size; 782 runtime->oss.period_frames = 1; 783 runtime->oss.periods = oss_periods; 784 return 0; 785 } 786 787 static int choose_rate(struct snd_pcm_substream *substream, 788 struct snd_pcm_hw_params *params, unsigned int best_rate) 789 { 790 const struct snd_interval *it; 791 struct snd_pcm_hw_params *save; 792 unsigned int rate, prev; 793 794 save = kmalloc(sizeof(*save), GFP_KERNEL); 795 if (save == NULL) 796 return -ENOMEM; 797 *save = *params; 798 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE); 799 800 /* try multiples of the best rate */ 801 rate = best_rate; 802 for (;;) { 803 if (it->max < rate || (it->max == rate && it->openmax)) 804 break; 805 if (it->min < rate || (it->min == rate && !it->openmin)) { 806 int ret; 807 ret = snd_pcm_hw_param_set(substream, params, 808 SNDRV_PCM_HW_PARAM_RATE, 809 rate, 0); 810 if (ret == (int)rate) { 811 kfree(save); 812 return rate; 813 } 814 *params = *save; 815 } 816 prev = rate; 817 rate += best_rate; 818 if (rate <= prev) 819 break; 820 } 821 822 /* not found, use the nearest rate */ 823 kfree(save); 824 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 825 } 826 827 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, 828 bool trylock) 829 { 830 struct snd_pcm_runtime *runtime = substream->runtime; 831 struct snd_pcm_hw_params *params, *sparams; 832 struct snd_pcm_sw_params *sw_params; 833 ssize_t oss_buffer_size, oss_period_size; 834 size_t oss_frame_size; 835 int err; 836 int direct; 837 snd_pcm_format_t format, sformat; 838 int n; 839 const struct snd_mask *sformat_mask; 840 struct snd_mask mask; 841 842 if (trylock) { 843 if (!(mutex_trylock(&runtime->oss.params_lock))) 844 return -EAGAIN; 845 } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) 846 return -EINTR; 847 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); 848 params = kmalloc(sizeof(*params), GFP_KERNEL); 849 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 850 if (!sw_params || !params || !sparams) { 851 err = -ENOMEM; 852 goto failure; 853 } 854 855 if (atomic_read(&substream->mmap_count)) 856 direct = 1; 857 else 858 direct = substream->oss.setup.direct; 859 860 _snd_pcm_hw_params_any(sparams); 861 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 862 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 863 snd_mask_none(&mask); 864 if (atomic_read(&substream->mmap_count)) 865 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 866 else { 867 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 868 if (!direct) 869 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 870 } 871 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 872 if (err < 0) { 873 pcm_dbg(substream->pcm, "No usable accesses\n"); 874 err = -EINVAL; 875 goto failure; 876 } 877 choose_rate(substream, sparams, runtime->oss.rate); 878 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 879 880 format = snd_pcm_oss_format_from(runtime->oss.format); 881 882 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 883 if (direct) 884 sformat = format; 885 else 886 sformat = snd_pcm_plug_slave_format(format, sformat_mask); 887 888 if ((__force int)sformat < 0 || 889 !snd_mask_test(sformat_mask, (__force int)sformat)) { 890 for (sformat = (__force snd_pcm_format_t)0; 891 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; 892 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { 893 if (snd_mask_test(sformat_mask, (__force int)sformat) && 894 snd_pcm_oss_format_to(sformat) >= 0) 895 break; 896 } 897 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { 898 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 899 err = -EINVAL; 900 goto failure; 901 } 902 } 903 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 904 if (err < 0) 905 goto failure; 906 907 if (direct) { 908 memcpy(params, sparams, sizeof(*params)); 909 } else { 910 _snd_pcm_hw_params_any(params); 911 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 912 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 913 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 914 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 915 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 916 runtime->oss.channels, 0); 917 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 918 runtime->oss.rate, 0); 919 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 920 params_access(params), params_format(params), 921 params_channels(params), params_rate(params)); 922 } 923 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 924 params_access(sparams), params_format(sparams), 925 params_channels(sparams), params_rate(sparams)); 926 927 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 928 params_channels(params) / 8; 929 930 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 931 snd_pcm_oss_plugin_clear(substream); 932 if (!direct) { 933 /* add necessary plugins */ 934 snd_pcm_oss_plugin_clear(substream); 935 if ((err = snd_pcm_plug_format_plugins(substream, 936 params, 937 sparams)) < 0) { 938 pcm_dbg(substream->pcm, 939 "snd_pcm_plug_format_plugins failed: %i\n", err); 940 snd_pcm_oss_plugin_clear(substream); 941 goto failure; 942 } 943 if (runtime->oss.plugin_first) { 944 struct snd_pcm_plugin *plugin; 945 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 946 pcm_dbg(substream->pcm, 947 "snd_pcm_plugin_build_io failed: %i\n", err); 948 snd_pcm_oss_plugin_clear(substream); 949 goto failure; 950 } 951 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 952 err = snd_pcm_plugin_append(plugin); 953 } else { 954 err = snd_pcm_plugin_insert(plugin); 955 } 956 if (err < 0) { 957 snd_pcm_oss_plugin_clear(substream); 958 goto failure; 959 } 960 } 961 } 962 #endif 963 964 err = snd_pcm_oss_period_size(substream, params, sparams); 965 if (err < 0) 966 goto failure; 967 968 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 969 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 970 if (err < 0) 971 goto failure; 972 973 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 974 runtime->oss.periods, NULL); 975 if (err < 0) 976 goto failure; 977 978 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 979 980 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { 981 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 982 goto failure; 983 } 984 985 if (runtime->oss.trigger) { 986 sw_params->start_threshold = 1; 987 } else { 988 sw_params->start_threshold = runtime->boundary; 989 } 990 if (atomic_read(&substream->mmap_count) || 991 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 992 sw_params->stop_threshold = runtime->boundary; 993 else 994 sw_params->stop_threshold = runtime->buffer_size; 995 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 996 sw_params->period_step = 1; 997 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 998 1 : runtime->period_size; 999 if (atomic_read(&substream->mmap_count) || 1000 substream->oss.setup.nosilence) { 1001 sw_params->silence_threshold = 0; 1002 sw_params->silence_size = 0; 1003 } else { 1004 snd_pcm_uframes_t frames; 1005 frames = runtime->period_size + 16; 1006 if (frames > runtime->buffer_size) 1007 frames = runtime->buffer_size; 1008 sw_params->silence_threshold = frames; 1009 sw_params->silence_size = frames; 1010 } 1011 1012 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1013 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1014 goto failure; 1015 } 1016 1017 runtime->oss.periods = params_periods(sparams); 1018 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1019 if (oss_period_size < 0) { 1020 err = -EINVAL; 1021 goto failure; 1022 } 1023 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1024 if (runtime->oss.plugin_first) { 1025 err = snd_pcm_plug_alloc(substream, oss_period_size); 1026 if (err < 0) 1027 goto failure; 1028 } 1029 #endif 1030 oss_period_size *= oss_frame_size; 1031 1032 oss_buffer_size = oss_period_size * runtime->oss.periods; 1033 if (oss_buffer_size < 0) { 1034 err = -EINVAL; 1035 goto failure; 1036 } 1037 1038 runtime->oss.period_bytes = oss_period_size; 1039 runtime->oss.buffer_bytes = oss_buffer_size; 1040 1041 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1042 runtime->oss.period_bytes, 1043 runtime->oss.buffer_bytes); 1044 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1045 params_period_size(sparams), 1046 params_buffer_size(sparams)); 1047 1048 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1049 runtime->oss.channels = params_channels(params); 1050 runtime->oss.rate = params_rate(params); 1051 1052 vfree(runtime->oss.buffer); 1053 runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); 1054 if (!runtime->oss.buffer) { 1055 err = -ENOMEM; 1056 goto failure; 1057 } 1058 1059 runtime->oss.params = 0; 1060 runtime->oss.prepare = 1; 1061 runtime->oss.buffer_used = 0; 1062 if (runtime->dma_area) 1063 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1064 1065 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1066 1067 err = 0; 1068 failure: 1069 kfree(sw_params); 1070 kfree(params); 1071 kfree(sparams); 1072 mutex_unlock(&runtime->oss.params_lock); 1073 return err; 1074 } 1075 1076 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1077 { 1078 int idx, err; 1079 struct snd_pcm_substream *asubstream = NULL, *substream; 1080 1081 for (idx = 0; idx < 2; idx++) { 1082 substream = pcm_oss_file->streams[idx]; 1083 if (substream == NULL) 1084 continue; 1085 if (asubstream == NULL) 1086 asubstream = substream; 1087 if (substream->runtime->oss.params) { 1088 err = snd_pcm_oss_change_params(substream, false); 1089 if (err < 0) 1090 return err; 1091 } 1092 } 1093 if (!asubstream) 1094 return -EIO; 1095 if (r_substream) 1096 *r_substream = asubstream; 1097 return 0; 1098 } 1099 1100 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1101 { 1102 int err; 1103 struct snd_pcm_runtime *runtime = substream->runtime; 1104 1105 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1106 if (err < 0) { 1107 pcm_dbg(substream->pcm, 1108 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1109 return err; 1110 } 1111 runtime->oss.prepare = 0; 1112 runtime->oss.prev_hw_ptr_period = 0; 1113 runtime->oss.period_ptr = 0; 1114 runtime->oss.buffer_used = 0; 1115 1116 return 0; 1117 } 1118 1119 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1120 { 1121 struct snd_pcm_runtime *runtime; 1122 int err; 1123 1124 if (substream == NULL) 1125 return 0; 1126 runtime = substream->runtime; 1127 if (runtime->oss.params) { 1128 err = snd_pcm_oss_change_params(substream, false); 1129 if (err < 0) 1130 return err; 1131 } 1132 if (runtime->oss.prepare) { 1133 err = snd_pcm_oss_prepare(substream); 1134 if (err < 0) 1135 return err; 1136 } 1137 return 0; 1138 } 1139 1140 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1141 { 1142 struct snd_pcm_runtime *runtime; 1143 snd_pcm_uframes_t frames; 1144 int err = 0; 1145 1146 while (1) { 1147 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1148 if (err < 0) 1149 break; 1150 runtime = substream->runtime; 1151 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1152 break; 1153 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1154 /* until avail(delay) <= buffer_size */ 1155 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1156 frames /= runtime->period_size; 1157 frames *= runtime->period_size; 1158 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1159 if (err < 0) 1160 break; 1161 } 1162 return err; 1163 } 1164 1165 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1166 { 1167 struct snd_pcm_runtime *runtime = substream->runtime; 1168 int ret; 1169 while (1) { 1170 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1171 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1172 #ifdef OSS_DEBUG 1173 pcm_dbg(substream->pcm, 1174 "pcm_oss: write: recovering from %s\n", 1175 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1176 "XRUN" : "SUSPEND"); 1177 #endif 1178 ret = snd_pcm_oss_prepare(substream); 1179 if (ret < 0) 1180 break; 1181 } 1182 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1183 frames, in_kernel); 1184 if (ret != -EPIPE && ret != -ESTRPIPE) 1185 break; 1186 /* test, if we can't store new data, because the stream */ 1187 /* has not been started */ 1188 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1189 return -EAGAIN; 1190 } 1191 return ret; 1192 } 1193 1194 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1195 { 1196 struct snd_pcm_runtime *runtime = substream->runtime; 1197 snd_pcm_sframes_t delay; 1198 int ret; 1199 while (1) { 1200 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1201 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1202 #ifdef OSS_DEBUG 1203 pcm_dbg(substream->pcm, 1204 "pcm_oss: read: recovering from %s\n", 1205 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1206 "XRUN" : "SUSPEND"); 1207 #endif 1208 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1209 if (ret < 0) 1210 break; 1211 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1212 ret = snd_pcm_oss_prepare(substream); 1213 if (ret < 0) 1214 break; 1215 } 1216 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1217 if (ret < 0) 1218 break; 1219 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1220 frames, in_kernel); 1221 if (ret == -EPIPE) { 1222 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1223 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1224 if (ret < 0) 1225 break; 1226 } 1227 continue; 1228 } 1229 if (ret != -ESTRPIPE) 1230 break; 1231 } 1232 return ret; 1233 } 1234 1235 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1236 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1237 { 1238 struct snd_pcm_runtime *runtime = substream->runtime; 1239 int ret; 1240 while (1) { 1241 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1242 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1243 #ifdef OSS_DEBUG 1244 pcm_dbg(substream->pcm, 1245 "pcm_oss: writev: recovering from %s\n", 1246 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1247 "XRUN" : "SUSPEND"); 1248 #endif 1249 ret = snd_pcm_oss_prepare(substream); 1250 if (ret < 0) 1251 break; 1252 } 1253 ret = snd_pcm_kernel_writev(substream, bufs, frames); 1254 if (ret != -EPIPE && ret != -ESTRPIPE) 1255 break; 1256 1257 /* test, if we can't store new data, because the stream */ 1258 /* has not been started */ 1259 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1260 return -EAGAIN; 1261 } 1262 return ret; 1263 } 1264 1265 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1266 { 1267 struct snd_pcm_runtime *runtime = substream->runtime; 1268 int ret; 1269 while (1) { 1270 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1271 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1272 #ifdef OSS_DEBUG 1273 pcm_dbg(substream->pcm, 1274 "pcm_oss: readv: recovering from %s\n", 1275 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1276 "XRUN" : "SUSPEND"); 1277 #endif 1278 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1279 if (ret < 0) 1280 break; 1281 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1282 ret = snd_pcm_oss_prepare(substream); 1283 if (ret < 0) 1284 break; 1285 } 1286 ret = snd_pcm_kernel_readv(substream, bufs, frames); 1287 if (ret != -EPIPE && ret != -ESTRPIPE) 1288 break; 1289 } 1290 return ret; 1291 } 1292 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 1293 1294 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1295 { 1296 struct snd_pcm_runtime *runtime = substream->runtime; 1297 snd_pcm_sframes_t frames, frames1; 1298 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1299 if (runtime->oss.plugin_first) { 1300 struct snd_pcm_plugin_channel *channels; 1301 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1302 if (!in_kernel) { 1303 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1304 return -EFAULT; 1305 buf = runtime->oss.buffer; 1306 } 1307 frames = bytes / oss_frame_bytes; 1308 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1309 if (frames1 < 0) 1310 return frames1; 1311 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1312 if (frames1 <= 0) 1313 return frames1; 1314 bytes = frames1 * oss_frame_bytes; 1315 } else 1316 #endif 1317 { 1318 frames = bytes_to_frames(runtime, bytes); 1319 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1320 if (frames1 <= 0) 1321 return frames1; 1322 bytes = frames_to_bytes(runtime, frames1); 1323 } 1324 return bytes; 1325 } 1326 1327 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1328 { 1329 size_t xfer = 0; 1330 ssize_t tmp; 1331 struct snd_pcm_runtime *runtime = substream->runtime; 1332 1333 if (atomic_read(&substream->mmap_count)) 1334 return -ENXIO; 1335 1336 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1337 return tmp; 1338 mutex_lock(&runtime->oss.params_lock); 1339 while (bytes > 0) { 1340 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1341 tmp = bytes; 1342 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1343 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1344 if (tmp > 0) { 1345 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1346 tmp = -EFAULT; 1347 goto err; 1348 } 1349 } 1350 runtime->oss.buffer_used += tmp; 1351 buf += tmp; 1352 bytes -= tmp; 1353 xfer += tmp; 1354 if (substream->oss.setup.partialfrag || 1355 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1356 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1357 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1358 if (tmp <= 0) 1359 goto err; 1360 runtime->oss.bytes += tmp; 1361 runtime->oss.period_ptr += tmp; 1362 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1363 if (runtime->oss.period_ptr == 0 || 1364 runtime->oss.period_ptr == runtime->oss.buffer_used) 1365 runtime->oss.buffer_used = 0; 1366 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1367 tmp = -EAGAIN; 1368 goto err; 1369 } 1370 } 1371 } else { 1372 tmp = snd_pcm_oss_write2(substream, 1373 (const char __force *)buf, 1374 runtime->oss.period_bytes, 0); 1375 if (tmp <= 0) 1376 goto err; 1377 runtime->oss.bytes += tmp; 1378 buf += tmp; 1379 bytes -= tmp; 1380 xfer += tmp; 1381 if ((substream->f_flags & O_NONBLOCK) != 0 && 1382 tmp != runtime->oss.period_bytes) 1383 break; 1384 } 1385 } 1386 mutex_unlock(&runtime->oss.params_lock); 1387 return xfer; 1388 1389 err: 1390 mutex_unlock(&runtime->oss.params_lock); 1391 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1392 } 1393 1394 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1395 { 1396 struct snd_pcm_runtime *runtime = substream->runtime; 1397 snd_pcm_sframes_t frames, frames1; 1398 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1399 char __user *final_dst = (char __force __user *)buf; 1400 if (runtime->oss.plugin_first) { 1401 struct snd_pcm_plugin_channel *channels; 1402 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1403 if (!in_kernel) 1404 buf = runtime->oss.buffer; 1405 frames = bytes / oss_frame_bytes; 1406 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1407 if (frames1 < 0) 1408 return frames1; 1409 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1410 if (frames1 <= 0) 1411 return frames1; 1412 bytes = frames1 * oss_frame_bytes; 1413 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1414 return -EFAULT; 1415 } else 1416 #endif 1417 { 1418 frames = bytes_to_frames(runtime, bytes); 1419 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1420 if (frames1 <= 0) 1421 return frames1; 1422 bytes = frames_to_bytes(runtime, frames1); 1423 } 1424 return bytes; 1425 } 1426 1427 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1428 { 1429 size_t xfer = 0; 1430 ssize_t tmp; 1431 struct snd_pcm_runtime *runtime = substream->runtime; 1432 1433 if (atomic_read(&substream->mmap_count)) 1434 return -ENXIO; 1435 1436 if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) 1437 return tmp; 1438 mutex_lock(&runtime->oss.params_lock); 1439 while (bytes > 0) { 1440 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1441 if (runtime->oss.buffer_used == 0) { 1442 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1443 if (tmp <= 0) 1444 goto err; 1445 runtime->oss.bytes += tmp; 1446 runtime->oss.period_ptr = tmp; 1447 runtime->oss.buffer_used = tmp; 1448 } 1449 tmp = bytes; 1450 if ((size_t) tmp > runtime->oss.buffer_used) 1451 tmp = runtime->oss.buffer_used; 1452 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1453 tmp = -EFAULT; 1454 goto err; 1455 } 1456 buf += tmp; 1457 bytes -= tmp; 1458 xfer += tmp; 1459 runtime->oss.buffer_used -= tmp; 1460 } else { 1461 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1462 runtime->oss.period_bytes, 0); 1463 if (tmp <= 0) 1464 goto err; 1465 runtime->oss.bytes += tmp; 1466 buf += tmp; 1467 bytes -= tmp; 1468 xfer += tmp; 1469 } 1470 } 1471 mutex_unlock(&runtime->oss.params_lock); 1472 return xfer; 1473 1474 err: 1475 mutex_unlock(&runtime->oss.params_lock); 1476 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1477 } 1478 1479 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1480 { 1481 struct snd_pcm_substream *substream; 1482 struct snd_pcm_runtime *runtime; 1483 int i; 1484 1485 for (i = 0; i < 2; i++) { 1486 substream = pcm_oss_file->streams[i]; 1487 if (!substream) 1488 continue; 1489 runtime = substream->runtime; 1490 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1491 runtime->oss.prepare = 1; 1492 runtime->oss.buffer_used = 0; 1493 runtime->oss.prev_hw_ptr_period = 0; 1494 runtime->oss.period_ptr = 0; 1495 } 1496 return 0; 1497 } 1498 1499 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1500 { 1501 struct snd_pcm_substream *substream; 1502 int err; 1503 1504 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1505 if (substream != NULL) { 1506 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1507 return err; 1508 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1509 } 1510 /* note: all errors from the start action are ignored */ 1511 /* OSS apps do not know, how to handle them */ 1512 return 0; 1513 } 1514 1515 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1516 { 1517 struct snd_pcm_runtime *runtime; 1518 ssize_t result = 0; 1519 snd_pcm_state_t state; 1520 long res; 1521 wait_queue_t wait; 1522 1523 runtime = substream->runtime; 1524 init_waitqueue_entry(&wait, current); 1525 add_wait_queue(&runtime->sleep, &wait); 1526 #ifdef OSS_DEBUG 1527 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1528 #endif 1529 while (1) { 1530 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1531 if (result > 0) { 1532 runtime->oss.buffer_used = 0; 1533 result = 0; 1534 break; 1535 } 1536 if (result != 0 && result != -EAGAIN) 1537 break; 1538 result = 0; 1539 set_current_state(TASK_INTERRUPTIBLE); 1540 snd_pcm_stream_lock_irq(substream); 1541 state = runtime->status->state; 1542 snd_pcm_stream_unlock_irq(substream); 1543 if (state != SNDRV_PCM_STATE_RUNNING) { 1544 set_current_state(TASK_RUNNING); 1545 break; 1546 } 1547 res = schedule_timeout(10 * HZ); 1548 if (signal_pending(current)) { 1549 result = -ERESTARTSYS; 1550 break; 1551 } 1552 if (res == 0) { 1553 pcm_err(substream->pcm, 1554 "OSS sync error - DMA timeout\n"); 1555 result = -EIO; 1556 break; 1557 } 1558 } 1559 remove_wait_queue(&runtime->sleep, &wait); 1560 return result; 1561 } 1562 1563 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1564 { 1565 int err = 0; 1566 unsigned int saved_f_flags; 1567 struct snd_pcm_substream *substream; 1568 struct snd_pcm_runtime *runtime; 1569 snd_pcm_format_t format; 1570 unsigned long width; 1571 size_t size; 1572 1573 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1574 if (substream != NULL) { 1575 runtime = substream->runtime; 1576 if (atomic_read(&substream->mmap_count)) 1577 goto __direct; 1578 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1579 return err; 1580 format = snd_pcm_oss_format_from(runtime->oss.format); 1581 width = snd_pcm_format_physical_width(format); 1582 mutex_lock(&runtime->oss.params_lock); 1583 if (runtime->oss.buffer_used > 0) { 1584 #ifdef OSS_DEBUG 1585 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1586 #endif 1587 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1588 snd_pcm_format_set_silence(format, 1589 runtime->oss.buffer + runtime->oss.buffer_used, 1590 size); 1591 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1592 if (err < 0) { 1593 mutex_unlock(&runtime->oss.params_lock); 1594 return err; 1595 } 1596 } else if (runtime->oss.period_ptr > 0) { 1597 #ifdef OSS_DEBUG 1598 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1599 #endif 1600 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1601 snd_pcm_format_set_silence(format, 1602 runtime->oss.buffer, 1603 size * 8 / width); 1604 err = snd_pcm_oss_sync1(substream, size); 1605 if (err < 0) { 1606 mutex_unlock(&runtime->oss.params_lock); 1607 return err; 1608 } 1609 } 1610 /* 1611 * The ALSA's period might be a bit large than OSS one. 1612 * Fill the remain portion of ALSA period with zeros. 1613 */ 1614 size = runtime->control->appl_ptr % runtime->period_size; 1615 if (size > 0) { 1616 size = runtime->period_size - size; 1617 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) 1618 snd_pcm_lib_write(substream, NULL, size); 1619 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 1620 snd_pcm_lib_writev(substream, NULL, size); 1621 } 1622 mutex_unlock(&runtime->oss.params_lock); 1623 /* 1624 * finish sync: drain the buffer 1625 */ 1626 __direct: 1627 saved_f_flags = substream->f_flags; 1628 substream->f_flags &= ~O_NONBLOCK; 1629 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1630 substream->f_flags = saved_f_flags; 1631 if (err < 0) 1632 return err; 1633 runtime->oss.prepare = 1; 1634 } 1635 1636 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1637 if (substream != NULL) { 1638 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1639 return err; 1640 runtime = substream->runtime; 1641 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1642 if (err < 0) 1643 return err; 1644 runtime->oss.buffer_used = 0; 1645 runtime->oss.prepare = 1; 1646 } 1647 return 0; 1648 } 1649 1650 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1651 { 1652 int idx; 1653 1654 for (idx = 1; idx >= 0; --idx) { 1655 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1656 struct snd_pcm_runtime *runtime; 1657 if (substream == NULL) 1658 continue; 1659 runtime = substream->runtime; 1660 if (rate < 1000) 1661 rate = 1000; 1662 else if (rate > 192000) 1663 rate = 192000; 1664 if (runtime->oss.rate != rate) { 1665 runtime->oss.params = 1; 1666 runtime->oss.rate = rate; 1667 } 1668 } 1669 return snd_pcm_oss_get_rate(pcm_oss_file); 1670 } 1671 1672 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1673 { 1674 struct snd_pcm_substream *substream; 1675 int err; 1676 1677 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1678 return err; 1679 return substream->runtime->oss.rate; 1680 } 1681 1682 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1683 { 1684 int idx; 1685 if (channels < 1) 1686 channels = 1; 1687 if (channels > 128) 1688 return -EINVAL; 1689 for (idx = 1; idx >= 0; --idx) { 1690 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1691 struct snd_pcm_runtime *runtime; 1692 if (substream == NULL) 1693 continue; 1694 runtime = substream->runtime; 1695 if (runtime->oss.channels != channels) { 1696 runtime->oss.params = 1; 1697 runtime->oss.channels = channels; 1698 } 1699 } 1700 return snd_pcm_oss_get_channels(pcm_oss_file); 1701 } 1702 1703 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1704 { 1705 struct snd_pcm_substream *substream; 1706 int err; 1707 1708 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1709 return err; 1710 return substream->runtime->oss.channels; 1711 } 1712 1713 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1714 { 1715 struct snd_pcm_substream *substream; 1716 int err; 1717 1718 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1719 return err; 1720 return substream->runtime->oss.period_bytes; 1721 } 1722 1723 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1724 { 1725 struct snd_pcm_substream *substream; 1726 int err; 1727 int direct; 1728 struct snd_pcm_hw_params *params; 1729 unsigned int formats = 0; 1730 const struct snd_mask *format_mask; 1731 int fmt; 1732 1733 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1734 return err; 1735 if (atomic_read(&substream->mmap_count)) 1736 direct = 1; 1737 else 1738 direct = substream->oss.setup.direct; 1739 if (!direct) 1740 return AFMT_MU_LAW | AFMT_U8 | 1741 AFMT_S16_LE | AFMT_S16_BE | 1742 AFMT_S8 | AFMT_U16_LE | 1743 AFMT_U16_BE | 1744 AFMT_S32_LE | AFMT_S32_BE | 1745 AFMT_S24_LE | AFMT_S24_BE | 1746 AFMT_S24_PACKED; 1747 params = kmalloc(sizeof(*params), GFP_KERNEL); 1748 if (!params) 1749 return -ENOMEM; 1750 _snd_pcm_hw_params_any(params); 1751 err = snd_pcm_hw_refine(substream, params); 1752 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); 1753 kfree(params); 1754 if (err < 0) 1755 return err; 1756 for (fmt = 0; fmt < 32; ++fmt) { 1757 if (snd_mask_test(format_mask, fmt)) { 1758 int f = snd_pcm_oss_format_to(fmt); 1759 if (f >= 0) 1760 formats |= f; 1761 } 1762 } 1763 return formats; 1764 } 1765 1766 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1767 { 1768 int formats, idx; 1769 1770 if (format != AFMT_QUERY) { 1771 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1772 if (formats < 0) 1773 return formats; 1774 if (!(formats & format)) 1775 format = AFMT_U8; 1776 for (idx = 1; idx >= 0; --idx) { 1777 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1778 struct snd_pcm_runtime *runtime; 1779 if (substream == NULL) 1780 continue; 1781 runtime = substream->runtime; 1782 if (runtime->oss.format != format) { 1783 runtime->oss.params = 1; 1784 runtime->oss.format = format; 1785 } 1786 } 1787 } 1788 return snd_pcm_oss_get_format(pcm_oss_file); 1789 } 1790 1791 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1792 { 1793 struct snd_pcm_substream *substream; 1794 int err; 1795 1796 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1797 return err; 1798 return substream->runtime->oss.format; 1799 } 1800 1801 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1802 { 1803 struct snd_pcm_runtime *runtime; 1804 1805 if (substream == NULL) 1806 return 0; 1807 runtime = substream->runtime; 1808 if (subdivide == 0) { 1809 subdivide = runtime->oss.subdivision; 1810 if (subdivide == 0) 1811 subdivide = 1; 1812 return subdivide; 1813 } 1814 if (runtime->oss.subdivision || runtime->oss.fragshift) 1815 return -EINVAL; 1816 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1817 subdivide != 8 && subdivide != 16) 1818 return -EINVAL; 1819 runtime->oss.subdivision = subdivide; 1820 runtime->oss.params = 1; 1821 return subdivide; 1822 } 1823 1824 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1825 { 1826 int err = -EINVAL, idx; 1827 1828 for (idx = 1; idx >= 0; --idx) { 1829 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1830 if (substream == NULL) 1831 continue; 1832 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) 1833 return err; 1834 } 1835 return err; 1836 } 1837 1838 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1839 { 1840 struct snd_pcm_runtime *runtime; 1841 1842 if (substream == NULL) 1843 return 0; 1844 runtime = substream->runtime; 1845 if (runtime->oss.subdivision || runtime->oss.fragshift) 1846 return -EINVAL; 1847 runtime->oss.fragshift = val & 0xffff; 1848 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1849 if (runtime->oss.fragshift < 4) /* < 16 */ 1850 runtime->oss.fragshift = 4; 1851 if (runtime->oss.maxfrags < 2) 1852 runtime->oss.maxfrags = 2; 1853 runtime->oss.params = 1; 1854 return 0; 1855 } 1856 1857 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1858 { 1859 int err = -EINVAL, idx; 1860 1861 for (idx = 1; idx >= 0; --idx) { 1862 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1863 if (substream == NULL) 1864 continue; 1865 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) 1866 return err; 1867 } 1868 return err; 1869 } 1870 1871 static int snd_pcm_oss_nonblock(struct file * file) 1872 { 1873 spin_lock(&file->f_lock); 1874 file->f_flags |= O_NONBLOCK; 1875 spin_unlock(&file->f_lock); 1876 return 0; 1877 } 1878 1879 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1880 { 1881 1882 if (substream == NULL) { 1883 res &= ~DSP_CAP_DUPLEX; 1884 return res; 1885 } 1886 #ifdef DSP_CAP_MULTI 1887 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 1888 if (substream->pstr->substream_count > 1) 1889 res |= DSP_CAP_MULTI; 1890 #endif 1891 /* DSP_CAP_REALTIME is set all times: */ 1892 /* all ALSA drivers can return actual pointer in ring buffer */ 1893 #if defined(DSP_CAP_REALTIME) && 0 1894 { 1895 struct snd_pcm_runtime *runtime = substream->runtime; 1896 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 1897 res &= ~DSP_CAP_REALTIME; 1898 } 1899 #endif 1900 return res; 1901 } 1902 1903 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 1904 { 1905 int result, idx; 1906 1907 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 1908 for (idx = 0; idx < 2; idx++) { 1909 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1910 result = snd_pcm_oss_get_caps1(substream, result); 1911 } 1912 result |= 0x0001; /* revision - same as SB AWE 64 */ 1913 return result; 1914 } 1915 1916 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 1917 snd_pcm_uframes_t hw_ptr) 1918 { 1919 struct snd_pcm_runtime *runtime = substream->runtime; 1920 snd_pcm_uframes_t appl_ptr; 1921 appl_ptr = hw_ptr + runtime->buffer_size; 1922 appl_ptr %= runtime->boundary; 1923 runtime->control->appl_ptr = appl_ptr; 1924 } 1925 1926 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 1927 { 1928 struct snd_pcm_runtime *runtime; 1929 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1930 int err, cmd; 1931 1932 #ifdef OSS_DEBUG 1933 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); 1934 #endif 1935 1936 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1937 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1938 1939 if (psubstream) { 1940 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 1941 return err; 1942 } 1943 if (csubstream) { 1944 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 1945 return err; 1946 } 1947 if (psubstream) { 1948 runtime = psubstream->runtime; 1949 if (trigger & PCM_ENABLE_OUTPUT) { 1950 if (runtime->oss.trigger) 1951 goto _skip1; 1952 if (atomic_read(&psubstream->mmap_count)) 1953 snd_pcm_oss_simulate_fill(psubstream, 1954 get_hw_ptr_period(runtime)); 1955 runtime->oss.trigger = 1; 1956 runtime->start_threshold = 1; 1957 cmd = SNDRV_PCM_IOCTL_START; 1958 } else { 1959 if (!runtime->oss.trigger) 1960 goto _skip1; 1961 runtime->oss.trigger = 0; 1962 runtime->start_threshold = runtime->boundary; 1963 cmd = SNDRV_PCM_IOCTL_DROP; 1964 runtime->oss.prepare = 1; 1965 } 1966 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 1967 if (err < 0) 1968 return err; 1969 } 1970 _skip1: 1971 if (csubstream) { 1972 runtime = csubstream->runtime; 1973 if (trigger & PCM_ENABLE_INPUT) { 1974 if (runtime->oss.trigger) 1975 goto _skip2; 1976 runtime->oss.trigger = 1; 1977 runtime->start_threshold = 1; 1978 cmd = SNDRV_PCM_IOCTL_START; 1979 } else { 1980 if (!runtime->oss.trigger) 1981 goto _skip2; 1982 runtime->oss.trigger = 0; 1983 runtime->start_threshold = runtime->boundary; 1984 cmd = SNDRV_PCM_IOCTL_DROP; 1985 runtime->oss.prepare = 1; 1986 } 1987 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 1988 if (err < 0) 1989 return err; 1990 } 1991 _skip2: 1992 return 0; 1993 } 1994 1995 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 1996 { 1997 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 1998 int result = 0; 1999 2000 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2001 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2002 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2003 result |= PCM_ENABLE_OUTPUT; 2004 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2005 result |= PCM_ENABLE_INPUT; 2006 return result; 2007 } 2008 2009 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2010 { 2011 struct snd_pcm_substream *substream; 2012 struct snd_pcm_runtime *runtime; 2013 snd_pcm_sframes_t delay; 2014 int err; 2015 2016 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2017 if (substream == NULL) 2018 return -EINVAL; 2019 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2020 return err; 2021 runtime = substream->runtime; 2022 if (runtime->oss.params || runtime->oss.prepare) 2023 return 0; 2024 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2025 if (err == -EPIPE) 2026 delay = 0; /* hack for broken OSS applications */ 2027 else if (err < 0) 2028 return err; 2029 return snd_pcm_oss_bytes(substream, delay); 2030 } 2031 2032 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2033 { 2034 struct snd_pcm_substream *substream; 2035 struct snd_pcm_runtime *runtime; 2036 snd_pcm_sframes_t delay; 2037 int fixup; 2038 struct count_info info; 2039 int err; 2040 2041 if (_info == NULL) 2042 return -EFAULT; 2043 substream = pcm_oss_file->streams[stream]; 2044 if (substream == NULL) 2045 return -EINVAL; 2046 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2047 return err; 2048 runtime = substream->runtime; 2049 if (runtime->oss.params || runtime->oss.prepare) { 2050 memset(&info, 0, sizeof(info)); 2051 if (copy_to_user(_info, &info, sizeof(info))) 2052 return -EFAULT; 2053 return 0; 2054 } 2055 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2056 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2057 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2058 err = 0; 2059 delay = 0; 2060 fixup = 0; 2061 } else { 2062 fixup = runtime->oss.buffer_used; 2063 } 2064 } else { 2065 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2066 fixup = -runtime->oss.buffer_used; 2067 } 2068 if (err < 0) 2069 return err; 2070 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2071 if (atomic_read(&substream->mmap_count)) { 2072 snd_pcm_sframes_t n; 2073 delay = get_hw_ptr_period(runtime); 2074 n = delay - runtime->oss.prev_hw_ptr_period; 2075 if (n < 0) 2076 n += runtime->boundary; 2077 info.blocks = n / runtime->period_size; 2078 runtime->oss.prev_hw_ptr_period = delay; 2079 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2080 snd_pcm_oss_simulate_fill(substream, delay); 2081 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2082 } else { 2083 delay = snd_pcm_oss_bytes(substream, delay); 2084 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2085 if (substream->oss.setup.buggyptr) 2086 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2087 else 2088 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2089 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2090 } else { 2091 delay += fixup; 2092 info.blocks = delay / runtime->oss.period_bytes; 2093 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2094 } 2095 } 2096 if (copy_to_user(_info, &info, sizeof(info))) 2097 return -EFAULT; 2098 return 0; 2099 } 2100 2101 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2102 { 2103 struct snd_pcm_substream *substream; 2104 struct snd_pcm_runtime *runtime; 2105 snd_pcm_sframes_t avail; 2106 int fixup; 2107 struct audio_buf_info info; 2108 int err; 2109 2110 if (_info == NULL) 2111 return -EFAULT; 2112 substream = pcm_oss_file->streams[stream]; 2113 if (substream == NULL) 2114 return -EINVAL; 2115 runtime = substream->runtime; 2116 2117 if (runtime->oss.params && 2118 (err = snd_pcm_oss_change_params(substream, false)) < 0) 2119 return err; 2120 2121 info.fragsize = runtime->oss.period_bytes; 2122 info.fragstotal = runtime->periods; 2123 if (runtime->oss.prepare) { 2124 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2125 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2126 info.fragments = runtime->oss.periods; 2127 } else { 2128 info.bytes = 0; 2129 info.fragments = 0; 2130 } 2131 } else { 2132 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2133 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2134 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2135 avail = runtime->buffer_size; 2136 err = 0; 2137 fixup = 0; 2138 } else { 2139 avail = runtime->buffer_size - avail; 2140 fixup = -runtime->oss.buffer_used; 2141 } 2142 } else { 2143 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2144 fixup = runtime->oss.buffer_used; 2145 } 2146 if (err < 0) 2147 return err; 2148 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2149 info.fragments = info.bytes / runtime->oss.period_bytes; 2150 } 2151 2152 #ifdef OSS_DEBUG 2153 pcm_dbg(substream->pcm, 2154 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2155 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2156 #endif 2157 if (copy_to_user(_info, &info, sizeof(info))) 2158 return -EFAULT; 2159 return 0; 2160 } 2161 2162 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2163 { 2164 // it won't be probably implemented 2165 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2166 return -EINVAL; 2167 } 2168 2169 static const char *strip_task_path(const char *path) 2170 { 2171 const char *ptr, *ptrl = NULL; 2172 for (ptr = path; *ptr; ptr++) { 2173 if (*ptr == '/') 2174 ptrl = ptr + 1; 2175 } 2176 return ptrl; 2177 } 2178 2179 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2180 const char *task_name, 2181 struct snd_pcm_oss_setup *rsetup) 2182 { 2183 struct snd_pcm_oss_setup *setup; 2184 2185 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2186 do { 2187 for (setup = pcm->streams[stream].oss.setup_list; setup; 2188 setup = setup->next) { 2189 if (!strcmp(setup->task_name, task_name)) 2190 goto out; 2191 } 2192 } while ((task_name = strip_task_path(task_name)) != NULL); 2193 out: 2194 if (setup) 2195 *rsetup = *setup; 2196 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2197 } 2198 2199 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2200 { 2201 struct snd_pcm_runtime *runtime; 2202 runtime = substream->runtime; 2203 vfree(runtime->oss.buffer); 2204 runtime->oss.buffer = NULL; 2205 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2206 snd_pcm_oss_plugin_clear(substream); 2207 #endif 2208 substream->oss.oss = 0; 2209 } 2210 2211 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2212 struct snd_pcm_oss_setup *setup, 2213 int minor) 2214 { 2215 struct snd_pcm_runtime *runtime; 2216 2217 substream->oss.oss = 1; 2218 substream->oss.setup = *setup; 2219 if (setup->nonblock) 2220 substream->f_flags |= O_NONBLOCK; 2221 else if (setup->block) 2222 substream->f_flags &= ~O_NONBLOCK; 2223 runtime = substream->runtime; 2224 runtime->oss.params = 1; 2225 runtime->oss.trigger = 1; 2226 runtime->oss.rate = 8000; 2227 mutex_init(&runtime->oss.params_lock); 2228 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2229 case SNDRV_MINOR_OSS_PCM_8: 2230 runtime->oss.format = AFMT_U8; 2231 break; 2232 case SNDRV_MINOR_OSS_PCM_16: 2233 runtime->oss.format = AFMT_S16_LE; 2234 break; 2235 default: 2236 runtime->oss.format = AFMT_MU_LAW; 2237 } 2238 runtime->oss.channels = 1; 2239 runtime->oss.fragshift = 0; 2240 runtime->oss.maxfrags = 0; 2241 runtime->oss.subdivision = 0; 2242 substream->pcm_release = snd_pcm_oss_release_substream; 2243 } 2244 2245 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2246 { 2247 int cidx; 2248 if (!pcm_oss_file) 2249 return 0; 2250 for (cidx = 0; cidx < 2; ++cidx) { 2251 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2252 if (substream) 2253 snd_pcm_release_substream(substream); 2254 } 2255 kfree(pcm_oss_file); 2256 return 0; 2257 } 2258 2259 static int snd_pcm_oss_open_file(struct file *file, 2260 struct snd_pcm *pcm, 2261 struct snd_pcm_oss_file **rpcm_oss_file, 2262 int minor, 2263 struct snd_pcm_oss_setup *setup) 2264 { 2265 int idx, err; 2266 struct snd_pcm_oss_file *pcm_oss_file; 2267 struct snd_pcm_substream *substream; 2268 fmode_t f_mode = file->f_mode; 2269 2270 if (rpcm_oss_file) 2271 *rpcm_oss_file = NULL; 2272 2273 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2274 if (pcm_oss_file == NULL) 2275 return -ENOMEM; 2276 2277 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2278 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2279 f_mode = FMODE_WRITE; 2280 2281 file->f_flags &= ~O_APPEND; 2282 for (idx = 0; idx < 2; idx++) { 2283 if (setup[idx].disable) 2284 continue; 2285 if (! pcm->streams[idx].substream_count) 2286 continue; /* no matching substream */ 2287 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2288 if (! (f_mode & FMODE_WRITE)) 2289 continue; 2290 } else { 2291 if (! (f_mode & FMODE_READ)) 2292 continue; 2293 } 2294 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2295 if (err < 0) { 2296 snd_pcm_oss_release_file(pcm_oss_file); 2297 return err; 2298 } 2299 2300 pcm_oss_file->streams[idx] = substream; 2301 substream->file = pcm_oss_file; 2302 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2303 } 2304 2305 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2306 snd_pcm_oss_release_file(pcm_oss_file); 2307 return -EINVAL; 2308 } 2309 2310 file->private_data = pcm_oss_file; 2311 if (rpcm_oss_file) 2312 *rpcm_oss_file = pcm_oss_file; 2313 return 0; 2314 } 2315 2316 2317 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2318 { 2319 unsigned int idx; 2320 2321 if (snd_BUG_ON(!task || !name || size < 2)) 2322 return -EINVAL; 2323 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2324 name[idx] = task->comm[idx]; 2325 name[idx] = '\0'; 2326 return 0; 2327 } 2328 2329 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2330 { 2331 int err; 2332 char task_name[32]; 2333 struct snd_pcm *pcm; 2334 struct snd_pcm_oss_file *pcm_oss_file; 2335 struct snd_pcm_oss_setup setup[2]; 2336 int nonblock; 2337 wait_queue_t wait; 2338 2339 err = nonseekable_open(inode, file); 2340 if (err < 0) 2341 return err; 2342 2343 pcm = snd_lookup_oss_minor_data(iminor(inode), 2344 SNDRV_OSS_DEVICE_TYPE_PCM); 2345 if (pcm == NULL) { 2346 err = -ENODEV; 2347 goto __error1; 2348 } 2349 err = snd_card_file_add(pcm->card, file); 2350 if (err < 0) 2351 goto __error1; 2352 if (!try_module_get(pcm->card->module)) { 2353 err = -EFAULT; 2354 goto __error2; 2355 } 2356 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2357 err = -EFAULT; 2358 goto __error; 2359 } 2360 memset(setup, 0, sizeof(setup)); 2361 if (file->f_mode & FMODE_WRITE) 2362 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2363 task_name, &setup[0]); 2364 if (file->f_mode & FMODE_READ) 2365 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2366 task_name, &setup[1]); 2367 2368 nonblock = !!(file->f_flags & O_NONBLOCK); 2369 if (!nonblock) 2370 nonblock = nonblock_open; 2371 2372 init_waitqueue_entry(&wait, current); 2373 add_wait_queue(&pcm->open_wait, &wait); 2374 mutex_lock(&pcm->open_mutex); 2375 while (1) { 2376 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2377 iminor(inode), setup); 2378 if (err >= 0) 2379 break; 2380 if (err == -EAGAIN) { 2381 if (nonblock) { 2382 err = -EBUSY; 2383 break; 2384 } 2385 } else 2386 break; 2387 set_current_state(TASK_INTERRUPTIBLE); 2388 mutex_unlock(&pcm->open_mutex); 2389 schedule(); 2390 mutex_lock(&pcm->open_mutex); 2391 if (pcm->card->shutdown) { 2392 err = -ENODEV; 2393 break; 2394 } 2395 if (signal_pending(current)) { 2396 err = -ERESTARTSYS; 2397 break; 2398 } 2399 } 2400 remove_wait_queue(&pcm->open_wait, &wait); 2401 mutex_unlock(&pcm->open_mutex); 2402 if (err < 0) 2403 goto __error; 2404 snd_card_unref(pcm->card); 2405 return err; 2406 2407 __error: 2408 module_put(pcm->card->module); 2409 __error2: 2410 snd_card_file_remove(pcm->card, file); 2411 __error1: 2412 if (pcm) 2413 snd_card_unref(pcm->card); 2414 return err; 2415 } 2416 2417 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2418 { 2419 struct snd_pcm *pcm; 2420 struct snd_pcm_substream *substream; 2421 struct snd_pcm_oss_file *pcm_oss_file; 2422 2423 pcm_oss_file = file->private_data; 2424 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2425 if (substream == NULL) 2426 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2427 if (snd_BUG_ON(!substream)) 2428 return -ENXIO; 2429 pcm = substream->pcm; 2430 if (!pcm->card->shutdown) 2431 snd_pcm_oss_sync(pcm_oss_file); 2432 mutex_lock(&pcm->open_mutex); 2433 snd_pcm_oss_release_file(pcm_oss_file); 2434 mutex_unlock(&pcm->open_mutex); 2435 wake_up(&pcm->open_wait); 2436 module_put(pcm->card->module); 2437 snd_card_file_remove(pcm->card, file); 2438 return 0; 2439 } 2440 2441 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2442 { 2443 struct snd_pcm_oss_file *pcm_oss_file; 2444 int __user *p = (int __user *)arg; 2445 int res; 2446 2447 pcm_oss_file = file->private_data; 2448 if (cmd == OSS_GETVERSION) 2449 return put_user(SNDRV_OSS_VERSION, p); 2450 if (cmd == OSS_ALSAEMULVER) 2451 return put_user(1, p); 2452 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) 2453 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2454 struct snd_pcm_substream *substream; 2455 int idx; 2456 for (idx = 0; idx < 2; ++idx) { 2457 substream = pcm_oss_file->streams[idx]; 2458 if (substream != NULL) 2459 break; 2460 } 2461 if (snd_BUG_ON(idx >= 2)) 2462 return -ENXIO; 2463 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2464 } 2465 #endif 2466 if (((cmd >> 8) & 0xff) != 'P') 2467 return -EINVAL; 2468 #ifdef OSS_DEBUG 2469 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2470 #endif 2471 switch (cmd) { 2472 case SNDCTL_DSP_RESET: 2473 return snd_pcm_oss_reset(pcm_oss_file); 2474 case SNDCTL_DSP_SYNC: 2475 return snd_pcm_oss_sync(pcm_oss_file); 2476 case SNDCTL_DSP_SPEED: 2477 if (get_user(res, p)) 2478 return -EFAULT; 2479 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2480 return res; 2481 return put_user(res, p); 2482 case SOUND_PCM_READ_RATE: 2483 res = snd_pcm_oss_get_rate(pcm_oss_file); 2484 if (res < 0) 2485 return res; 2486 return put_user(res, p); 2487 case SNDCTL_DSP_STEREO: 2488 if (get_user(res, p)) 2489 return -EFAULT; 2490 res = res > 0 ? 2 : 1; 2491 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2492 return res; 2493 return put_user(--res, p); 2494 case SNDCTL_DSP_GETBLKSIZE: 2495 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2496 if (res < 0) 2497 return res; 2498 return put_user(res, p); 2499 case SNDCTL_DSP_SETFMT: 2500 if (get_user(res, p)) 2501 return -EFAULT; 2502 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2503 if (res < 0) 2504 return res; 2505 return put_user(res, p); 2506 case SOUND_PCM_READ_BITS: 2507 res = snd_pcm_oss_get_format(pcm_oss_file); 2508 if (res < 0) 2509 return res; 2510 return put_user(res, p); 2511 case SNDCTL_DSP_CHANNELS: 2512 if (get_user(res, p)) 2513 return -EFAULT; 2514 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2515 if (res < 0) 2516 return res; 2517 return put_user(res, p); 2518 case SOUND_PCM_READ_CHANNELS: 2519 res = snd_pcm_oss_get_channels(pcm_oss_file); 2520 if (res < 0) 2521 return res; 2522 return put_user(res, p); 2523 case SOUND_PCM_WRITE_FILTER: 2524 case SOUND_PCM_READ_FILTER: 2525 return -EIO; 2526 case SNDCTL_DSP_POST: 2527 return snd_pcm_oss_post(pcm_oss_file); 2528 case SNDCTL_DSP_SUBDIVIDE: 2529 if (get_user(res, p)) 2530 return -EFAULT; 2531 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2532 if (res < 0) 2533 return res; 2534 return put_user(res, p); 2535 case SNDCTL_DSP_SETFRAGMENT: 2536 if (get_user(res, p)) 2537 return -EFAULT; 2538 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2539 case SNDCTL_DSP_GETFMTS: 2540 res = snd_pcm_oss_get_formats(pcm_oss_file); 2541 if (res < 0) 2542 return res; 2543 return put_user(res, p); 2544 case SNDCTL_DSP_GETOSPACE: 2545 case SNDCTL_DSP_GETISPACE: 2546 return snd_pcm_oss_get_space(pcm_oss_file, 2547 cmd == SNDCTL_DSP_GETISPACE ? 2548 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2549 (struct audio_buf_info __user *) arg); 2550 case SNDCTL_DSP_NONBLOCK: 2551 return snd_pcm_oss_nonblock(file); 2552 case SNDCTL_DSP_GETCAPS: 2553 res = snd_pcm_oss_get_caps(pcm_oss_file); 2554 if (res < 0) 2555 return res; 2556 return put_user(res, p); 2557 case SNDCTL_DSP_GETTRIGGER: 2558 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2559 if (res < 0) 2560 return res; 2561 return put_user(res, p); 2562 case SNDCTL_DSP_SETTRIGGER: 2563 if (get_user(res, p)) 2564 return -EFAULT; 2565 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2566 case SNDCTL_DSP_GETIPTR: 2567 case SNDCTL_DSP_GETOPTR: 2568 return snd_pcm_oss_get_ptr(pcm_oss_file, 2569 cmd == SNDCTL_DSP_GETIPTR ? 2570 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2571 (struct count_info __user *) arg); 2572 case SNDCTL_DSP_MAPINBUF: 2573 case SNDCTL_DSP_MAPOUTBUF: 2574 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2575 cmd == SNDCTL_DSP_MAPINBUF ? 2576 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2577 (struct buffmem_desc __user *) arg); 2578 case SNDCTL_DSP_SETSYNCRO: 2579 /* stop DMA now.. */ 2580 return 0; 2581 case SNDCTL_DSP_SETDUPLEX: 2582 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2583 return 0; 2584 return -EIO; 2585 case SNDCTL_DSP_GETODELAY: 2586 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2587 if (res < 0) { 2588 /* it's for sure, some broken apps don't check for error codes */ 2589 put_user(0, p); 2590 return res; 2591 } 2592 return put_user(res, p); 2593 case SNDCTL_DSP_PROFILE: 2594 return 0; /* silently ignore */ 2595 default: 2596 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2597 } 2598 return -EINVAL; 2599 } 2600 2601 #ifdef CONFIG_COMPAT 2602 /* all compatible */ 2603 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, 2604 unsigned long arg) 2605 { 2606 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2607 } 2608 #else 2609 #define snd_pcm_oss_ioctl_compat NULL 2610 #endif 2611 2612 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2613 { 2614 struct snd_pcm_oss_file *pcm_oss_file; 2615 struct snd_pcm_substream *substream; 2616 2617 pcm_oss_file = file->private_data; 2618 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2619 if (substream == NULL) 2620 return -ENXIO; 2621 substream->f_flags = file->f_flags & O_NONBLOCK; 2622 #ifndef OSS_DEBUG 2623 return snd_pcm_oss_read1(substream, buf, count); 2624 #else 2625 { 2626 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2627 pcm_dbg(substream->pcm, 2628 "pcm_oss: read %li bytes (returned %li bytes)\n", 2629 (long)count, (long)res); 2630 return res; 2631 } 2632 #endif 2633 } 2634 2635 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2636 { 2637 struct snd_pcm_oss_file *pcm_oss_file; 2638 struct snd_pcm_substream *substream; 2639 long result; 2640 2641 pcm_oss_file = file->private_data; 2642 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2643 if (substream == NULL) 2644 return -ENXIO; 2645 substream->f_flags = file->f_flags & O_NONBLOCK; 2646 result = snd_pcm_oss_write1(substream, buf, count); 2647 #ifdef OSS_DEBUG 2648 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2649 (long)count, (long)result); 2650 #endif 2651 return result; 2652 } 2653 2654 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2655 { 2656 struct snd_pcm_runtime *runtime = substream->runtime; 2657 if (atomic_read(&substream->mmap_count)) 2658 return runtime->oss.prev_hw_ptr_period != 2659 get_hw_ptr_period(runtime); 2660 else 2661 return snd_pcm_playback_avail(runtime) >= 2662 runtime->oss.period_frames; 2663 } 2664 2665 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2666 { 2667 struct snd_pcm_runtime *runtime = substream->runtime; 2668 if (atomic_read(&substream->mmap_count)) 2669 return runtime->oss.prev_hw_ptr_period != 2670 get_hw_ptr_period(runtime); 2671 else 2672 return snd_pcm_capture_avail(runtime) >= 2673 runtime->oss.period_frames; 2674 } 2675 2676 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) 2677 { 2678 struct snd_pcm_oss_file *pcm_oss_file; 2679 unsigned int mask; 2680 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2681 2682 pcm_oss_file = file->private_data; 2683 2684 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2685 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2686 2687 mask = 0; 2688 if (psubstream != NULL) { 2689 struct snd_pcm_runtime *runtime = psubstream->runtime; 2690 poll_wait(file, &runtime->sleep, wait); 2691 snd_pcm_stream_lock_irq(psubstream); 2692 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2693 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2694 snd_pcm_oss_playback_ready(psubstream))) 2695 mask |= POLLOUT | POLLWRNORM; 2696 snd_pcm_stream_unlock_irq(psubstream); 2697 } 2698 if (csubstream != NULL) { 2699 struct snd_pcm_runtime *runtime = csubstream->runtime; 2700 snd_pcm_state_t ostate; 2701 poll_wait(file, &runtime->sleep, wait); 2702 snd_pcm_stream_lock_irq(csubstream); 2703 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2704 snd_pcm_oss_capture_ready(csubstream)) 2705 mask |= POLLIN | POLLRDNORM; 2706 snd_pcm_stream_unlock_irq(csubstream); 2707 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2708 struct snd_pcm_oss_file ofile; 2709 memset(&ofile, 0, sizeof(ofile)); 2710 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2711 runtime->oss.trigger = 0; 2712 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2713 } 2714 } 2715 2716 return mask; 2717 } 2718 2719 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2720 { 2721 struct snd_pcm_oss_file *pcm_oss_file; 2722 struct snd_pcm_substream *substream = NULL; 2723 struct snd_pcm_runtime *runtime; 2724 int err; 2725 2726 #ifdef OSS_DEBUG 2727 pr_debug("pcm_oss: mmap begin\n"); 2728 #endif 2729 pcm_oss_file = file->private_data; 2730 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2731 case VM_READ | VM_WRITE: 2732 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2733 if (substream) 2734 break; 2735 /* Fall through */ 2736 case VM_READ: 2737 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2738 break; 2739 case VM_WRITE: 2740 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2741 break; 2742 default: 2743 return -EINVAL; 2744 } 2745 /* set VM_READ access as well to fix memset() routines that do 2746 reads before writes (to improve performance) */ 2747 area->vm_flags |= VM_READ; 2748 if (substream == NULL) 2749 return -ENXIO; 2750 runtime = substream->runtime; 2751 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2752 return -EIO; 2753 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2754 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2755 else 2756 return -EIO; 2757 2758 if (runtime->oss.params) { 2759 /* use mutex_trylock() for params_lock for avoiding a deadlock 2760 * between mmap_sem and params_lock taken by 2761 * copy_from/to_user() in snd_pcm_oss_write/read() 2762 */ 2763 err = snd_pcm_oss_change_params(substream, true); 2764 if (err < 0) 2765 return err; 2766 } 2767 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2768 if (runtime->oss.plugin_first != NULL) 2769 return -EIO; 2770 #endif 2771 2772 if (area->vm_pgoff != 0) 2773 return -EINVAL; 2774 2775 err = snd_pcm_mmap_data(substream, file, area); 2776 if (err < 0) 2777 return err; 2778 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2779 runtime->silence_threshold = 0; 2780 runtime->silence_size = 0; 2781 #ifdef OSS_DEBUG 2782 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2783 runtime->oss.mmap_bytes); 2784 #endif 2785 /* In mmap mode we never stop */ 2786 runtime->stop_threshold = runtime->boundary; 2787 2788 return 0; 2789 } 2790 2791 #ifdef CONFIG_SND_VERBOSE_PROCFS 2792 /* 2793 * /proc interface 2794 */ 2795 2796 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2797 struct snd_info_buffer *buffer) 2798 { 2799 struct snd_pcm_str *pstr = entry->private_data; 2800 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2801 mutex_lock(&pstr->oss.setup_mutex); 2802 while (setup) { 2803 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2804 setup->task_name, 2805 setup->periods, 2806 setup->period_size, 2807 setup->disable ? " disable" : "", 2808 setup->direct ? " direct" : "", 2809 setup->block ? " block" : "", 2810 setup->nonblock ? " non-block" : "", 2811 setup->partialfrag ? " partial-frag" : "", 2812 setup->nosilence ? " no-silence" : ""); 2813 setup = setup->next; 2814 } 2815 mutex_unlock(&pstr->oss.setup_mutex); 2816 } 2817 2818 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2819 { 2820 struct snd_pcm_oss_setup *setup, *setupn; 2821 2822 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2823 setup; setup = setupn) { 2824 setupn = setup->next; 2825 kfree(setup->task_name); 2826 kfree(setup); 2827 } 2828 pstr->oss.setup_list = NULL; 2829 } 2830 2831 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2832 struct snd_info_buffer *buffer) 2833 { 2834 struct snd_pcm_str *pstr = entry->private_data; 2835 char line[128], str[32], task_name[32]; 2836 const char *ptr; 2837 int idx1; 2838 struct snd_pcm_oss_setup *setup, *setup1, template; 2839 2840 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2841 mutex_lock(&pstr->oss.setup_mutex); 2842 memset(&template, 0, sizeof(template)); 2843 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2844 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2845 snd_pcm_oss_proc_free_setup_list(pstr); 2846 mutex_unlock(&pstr->oss.setup_mutex); 2847 continue; 2848 } 2849 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2850 if (!strcmp(setup->task_name, task_name)) { 2851 template = *setup; 2852 break; 2853 } 2854 } 2855 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2856 template.periods = simple_strtoul(str, NULL, 10); 2857 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2858 template.period_size = simple_strtoul(str, NULL, 10); 2859 for (idx1 = 31; idx1 >= 0; idx1--) 2860 if (template.period_size & (1 << idx1)) 2861 break; 2862 for (idx1--; idx1 >= 0; idx1--) 2863 template.period_size &= ~(1 << idx1); 2864 do { 2865 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2866 if (!strcmp(str, "disable")) { 2867 template.disable = 1; 2868 } else if (!strcmp(str, "direct")) { 2869 template.direct = 1; 2870 } else if (!strcmp(str, "block")) { 2871 template.block = 1; 2872 } else if (!strcmp(str, "non-block")) { 2873 template.nonblock = 1; 2874 } else if (!strcmp(str, "partial-frag")) { 2875 template.partialfrag = 1; 2876 } else if (!strcmp(str, "no-silence")) { 2877 template.nosilence = 1; 2878 } else if (!strcmp(str, "buggy-ptr")) { 2879 template.buggyptr = 1; 2880 } 2881 } while (*str); 2882 if (setup == NULL) { 2883 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 2884 if (! setup) { 2885 buffer->error = -ENOMEM; 2886 mutex_unlock(&pstr->oss.setup_mutex); 2887 return; 2888 } 2889 if (pstr->oss.setup_list == NULL) 2890 pstr->oss.setup_list = setup; 2891 else { 2892 for (setup1 = pstr->oss.setup_list; 2893 setup1->next; setup1 = setup1->next); 2894 setup1->next = setup; 2895 } 2896 template.task_name = kstrdup(task_name, GFP_KERNEL); 2897 if (! template.task_name) { 2898 kfree(setup); 2899 buffer->error = -ENOMEM; 2900 mutex_unlock(&pstr->oss.setup_mutex); 2901 return; 2902 } 2903 } 2904 *setup = template; 2905 mutex_unlock(&pstr->oss.setup_mutex); 2906 } 2907 } 2908 2909 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 2910 { 2911 int stream; 2912 for (stream = 0; stream < 2; ++stream) { 2913 struct snd_info_entry *entry; 2914 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2915 if (pstr->substream_count == 0) 2916 continue; 2917 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 2918 entry->content = SNDRV_INFO_CONTENT_TEXT; 2919 entry->mode = S_IFREG | S_IRUGO | S_IWUSR; 2920 entry->c.text.read = snd_pcm_oss_proc_read; 2921 entry->c.text.write = snd_pcm_oss_proc_write; 2922 entry->private_data = pstr; 2923 if (snd_info_register(entry) < 0) { 2924 snd_info_free_entry(entry); 2925 entry = NULL; 2926 } 2927 } 2928 pstr->oss.proc_entry = entry; 2929 } 2930 } 2931 2932 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 2933 { 2934 int stream; 2935 for (stream = 0; stream < 2; ++stream) { 2936 struct snd_pcm_str *pstr = &pcm->streams[stream]; 2937 snd_info_free_entry(pstr->oss.proc_entry); 2938 pstr->oss.proc_entry = NULL; 2939 snd_pcm_oss_proc_free_setup_list(pstr); 2940 } 2941 } 2942 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 2943 #define snd_pcm_oss_proc_init(pcm) 2944 #define snd_pcm_oss_proc_done(pcm) 2945 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 2946 2947 /* 2948 * ENTRY functions 2949 */ 2950 2951 static const struct file_operations snd_pcm_oss_f_reg = 2952 { 2953 .owner = THIS_MODULE, 2954 .read = snd_pcm_oss_read, 2955 .write = snd_pcm_oss_write, 2956 .open = snd_pcm_oss_open, 2957 .release = snd_pcm_oss_release, 2958 .llseek = no_llseek, 2959 .poll = snd_pcm_oss_poll, 2960 .unlocked_ioctl = snd_pcm_oss_ioctl, 2961 .compat_ioctl = snd_pcm_oss_ioctl_compat, 2962 .mmap = snd_pcm_oss_mmap, 2963 }; 2964 2965 static void register_oss_dsp(struct snd_pcm *pcm, int index) 2966 { 2967 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 2968 pcm->card, index, &snd_pcm_oss_f_reg, 2969 pcm) < 0) { 2970 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 2971 pcm->card->number, pcm->device); 2972 } 2973 } 2974 2975 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 2976 { 2977 pcm->oss.reg = 0; 2978 if (dsp_map[pcm->card->number] == (int)pcm->device) { 2979 char name[128]; 2980 int duplex; 2981 register_oss_dsp(pcm, 0); 2982 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 2983 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 2984 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 2985 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 2986 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 2987 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 2988 pcm->card->number, 2989 name); 2990 #endif 2991 pcm->oss.reg++; 2992 pcm->oss.reg_mask |= 1; 2993 } 2994 if (adsp_map[pcm->card->number] == (int)pcm->device) { 2995 register_oss_dsp(pcm, 1); 2996 pcm->oss.reg++; 2997 pcm->oss.reg_mask |= 2; 2998 } 2999 3000 if (pcm->oss.reg) 3001 snd_pcm_oss_proc_init(pcm); 3002 3003 return 0; 3004 } 3005 3006 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3007 { 3008 if (pcm->oss.reg) { 3009 if (pcm->oss.reg_mask & 1) { 3010 pcm->oss.reg_mask &= ~1; 3011 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3012 pcm->card, 0); 3013 } 3014 if (pcm->oss.reg_mask & 2) { 3015 pcm->oss.reg_mask &= ~2; 3016 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3017 pcm->card, 1); 3018 } 3019 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3020 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3021 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3022 #endif 3023 } 3024 pcm->oss.reg = 0; 3025 } 3026 return 0; 3027 } 3028 3029 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3030 { 3031 snd_pcm_oss_disconnect_minor(pcm); 3032 snd_pcm_oss_proc_done(pcm); 3033 return 0; 3034 } 3035 3036 static struct snd_pcm_notify snd_pcm_oss_notify = 3037 { 3038 .n_register = snd_pcm_oss_register_minor, 3039 .n_disconnect = snd_pcm_oss_disconnect_minor, 3040 .n_unregister = snd_pcm_oss_unregister_minor, 3041 }; 3042 3043 static int __init alsa_pcm_oss_init(void) 3044 { 3045 int i; 3046 int err; 3047 3048 /* check device map table */ 3049 for (i = 0; i < SNDRV_CARDS; i++) { 3050 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3051 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3052 i, dsp_map[i]); 3053 dsp_map[i] = 0; 3054 } 3055 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3056 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3057 i, adsp_map[i]); 3058 adsp_map[i] = 1; 3059 } 3060 } 3061 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3062 return err; 3063 return 0; 3064 } 3065 3066 static void __exit alsa_pcm_oss_exit(void) 3067 { 3068 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3069 } 3070 3071 module_init(alsa_pcm_oss_init) 3072 module_exit(alsa_pcm_oss_exit) 3073