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 > 0) { 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 > 0) { 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 > 0) { 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 return v; 459 } 460 461 static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, 462 snd_pcm_hw_param_t var, unsigned int val, 463 int dir) 464 { 465 int changed; 466 if (hw_is_mask(var)) { 467 struct snd_mask *m = hw_param_mask(params, var); 468 if (val == 0 && dir < 0) { 469 changed = -EINVAL; 470 snd_mask_none(m); 471 } else { 472 if (dir > 0) 473 val++; 474 else if (dir < 0) 475 val--; 476 changed = snd_mask_refine_set(hw_param_mask(params, var), val); 477 } 478 } else if (hw_is_interval(var)) { 479 struct snd_interval *i = hw_param_interval(params, var); 480 if (val == 0 && dir < 0) { 481 changed = -EINVAL; 482 snd_interval_none(i); 483 } else if (dir == 0) 484 changed = snd_interval_refine_set(i, val); 485 else { 486 struct snd_interval t; 487 t.openmin = 1; 488 t.openmax = 1; 489 t.empty = 0; 490 t.integer = 0; 491 if (dir < 0) { 492 t.min = val - 1; 493 t.max = val; 494 } else { 495 t.min = val; 496 t.max = val+1; 497 } 498 changed = snd_interval_refine(i, &t); 499 } 500 } else 501 return -EINVAL; 502 if (changed > 0) { 503 params->cmask |= 1 << var; 504 params->rmask |= 1 << var; 505 } 506 return changed; 507 } 508 509 /** 510 * snd_pcm_hw_param_set 511 * @pcm: PCM instance 512 * @params: the hw_params instance 513 * @var: parameter to retrieve 514 * @val: value to set 515 * @dir: pointer to the direction (-1,0,1) or NULL 516 * 517 * Inside configuration space defined by PARAMS remove from PAR all 518 * values != VAL. Reduce configuration space accordingly. 519 * Return VAL or -EINVAL if the configuration space is empty 520 */ 521 static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, 522 struct snd_pcm_hw_params *params, 523 snd_pcm_hw_param_t var, unsigned int val, 524 int dir) 525 { 526 int changed = _snd_pcm_hw_param_set(params, var, val, dir); 527 if (changed < 0) 528 return changed; 529 if (params->rmask) { 530 int err = snd_pcm_hw_refine(pcm, params); 531 if (err < 0) 532 return err; 533 } 534 return snd_pcm_hw_param_value(params, var, NULL); 535 } 536 537 static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params, 538 snd_pcm_hw_param_t var) 539 { 540 int changed; 541 changed = snd_interval_setinteger(hw_param_interval(params, var)); 542 if (changed > 0) { 543 params->cmask |= 1 << var; 544 params->rmask |= 1 << var; 545 } 546 return changed; 547 } 548 549 /* 550 * plugin 551 */ 552 553 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 554 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream) 555 { 556 struct snd_pcm_runtime *runtime = substream->runtime; 557 struct snd_pcm_plugin *plugin, *next; 558 559 plugin = runtime->oss.plugin_first; 560 while (plugin) { 561 next = plugin->next; 562 snd_pcm_plugin_free(plugin); 563 plugin = next; 564 } 565 runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; 566 return 0; 567 } 568 569 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin) 570 { 571 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 572 plugin->next = runtime->oss.plugin_first; 573 plugin->prev = NULL; 574 if (runtime->oss.plugin_first) { 575 runtime->oss.plugin_first->prev = plugin; 576 runtime->oss.plugin_first = plugin; 577 } else { 578 runtime->oss.plugin_last = 579 runtime->oss.plugin_first = plugin; 580 } 581 return 0; 582 } 583 584 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin) 585 { 586 struct snd_pcm_runtime *runtime = plugin->plug->runtime; 587 plugin->next = NULL; 588 plugin->prev = runtime->oss.plugin_last; 589 if (runtime->oss.plugin_last) { 590 runtime->oss.plugin_last->next = plugin; 591 runtime->oss.plugin_last = plugin; 592 } else { 593 runtime->oss.plugin_last = 594 runtime->oss.plugin_first = plugin; 595 } 596 return 0; 597 } 598 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 599 600 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames) 601 { 602 struct snd_pcm_runtime *runtime = substream->runtime; 603 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 604 long bytes = frames_to_bytes(runtime, frames); 605 if (buffer_size == runtime->oss.buffer_bytes) 606 return bytes; 607 #if BITS_PER_LONG >= 64 608 return runtime->oss.buffer_bytes * bytes / buffer_size; 609 #else 610 { 611 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes; 612 return div_u64(bsize, buffer_size); 613 } 614 #endif 615 } 616 617 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes) 618 { 619 struct snd_pcm_runtime *runtime = substream->runtime; 620 long buffer_size = snd_pcm_lib_buffer_bytes(substream); 621 if (buffer_size == runtime->oss.buffer_bytes) 622 return bytes_to_frames(runtime, bytes); 623 return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); 624 } 625 626 static inline 627 snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime) 628 { 629 return runtime->hw_ptr_interrupt; 630 } 631 632 /* define extended formats in the recent OSS versions (if any) */ 633 /* linear formats */ 634 #define AFMT_S32_LE 0x00001000 635 #define AFMT_S32_BE 0x00002000 636 #define AFMT_S24_LE 0x00008000 637 #define AFMT_S24_BE 0x00010000 638 #define AFMT_S24_PACKED 0x00040000 639 640 /* other supported formats */ 641 #define AFMT_FLOAT 0x00004000 642 #define AFMT_SPDIF_RAW 0x00020000 643 644 /* unsupported formats */ 645 #define AFMT_AC3 0x00000400 646 #define AFMT_VORBIS 0x00000800 647 648 static snd_pcm_format_t snd_pcm_oss_format_from(int format) 649 { 650 switch (format) { 651 case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; 652 case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; 653 case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; 654 case AFMT_U8: return SNDRV_PCM_FORMAT_U8; 655 case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; 656 case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; 657 case AFMT_S8: return SNDRV_PCM_FORMAT_S8; 658 case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; 659 case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; 660 case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; 661 case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE; 662 case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE; 663 case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE; 664 case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE; 665 case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE; 666 case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT; 667 case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME; 668 default: return SNDRV_PCM_FORMAT_U8; 669 } 670 } 671 672 static int snd_pcm_oss_format_to(snd_pcm_format_t format) 673 { 674 switch (format) { 675 case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; 676 case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; 677 case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; 678 case SNDRV_PCM_FORMAT_U8: return AFMT_U8; 679 case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; 680 case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; 681 case SNDRV_PCM_FORMAT_S8: return AFMT_S8; 682 case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; 683 case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; 684 case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; 685 case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE; 686 case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE; 687 case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE; 688 case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE; 689 case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED; 690 case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT; 691 case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW; 692 default: return -EINVAL; 693 } 694 } 695 696 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 697 struct snd_pcm_hw_params *oss_params, 698 struct snd_pcm_hw_params *slave_params) 699 { 700 size_t s; 701 size_t oss_buffer_size, oss_period_size, oss_periods; 702 size_t min_period_size, max_period_size; 703 struct snd_pcm_runtime *runtime = substream->runtime; 704 size_t oss_frame_size; 705 706 oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * 707 params_channels(oss_params) / 8; 708 709 oss_buffer_size = snd_pcm_plug_client_size(substream, 710 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; 711 oss_buffer_size = rounddown_pow_of_two(oss_buffer_size); 712 if (atomic_read(&substream->mmap_count)) { 713 if (oss_buffer_size > runtime->oss.mmap_bytes) 714 oss_buffer_size = runtime->oss.mmap_bytes; 715 } 716 717 if (substream->oss.setup.period_size > 16) 718 oss_period_size = substream->oss.setup.period_size; 719 else if (runtime->oss.fragshift) { 720 oss_period_size = 1 << runtime->oss.fragshift; 721 if (oss_period_size > oss_buffer_size / 2) 722 oss_period_size = oss_buffer_size / 2; 723 } else { 724 int sd; 725 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; 726 727 oss_period_size = oss_buffer_size; 728 do { 729 oss_period_size /= 2; 730 } while (oss_period_size > bytes_per_sec); 731 if (runtime->oss.subdivision == 0) { 732 sd = 4; 733 if (oss_period_size / sd > 4096) 734 sd *= 2; 735 if (oss_period_size / sd < 4096) 736 sd = 1; 737 } else 738 sd = runtime->oss.subdivision; 739 oss_period_size /= sd; 740 if (oss_period_size < 16) 741 oss_period_size = 16; 742 } 743 744 min_period_size = snd_pcm_plug_client_size(substream, 745 snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 746 min_period_size *= oss_frame_size; 747 min_period_size = roundup_pow_of_two(min_period_size); 748 if (oss_period_size < min_period_size) 749 oss_period_size = min_period_size; 750 751 max_period_size = snd_pcm_plug_client_size(substream, 752 snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); 753 max_period_size *= oss_frame_size; 754 max_period_size = rounddown_pow_of_two(max_period_size); 755 if (oss_period_size > max_period_size) 756 oss_period_size = max_period_size; 757 758 oss_periods = oss_buffer_size / oss_period_size; 759 760 if (substream->oss.setup.periods > 1) 761 oss_periods = substream->oss.setup.periods; 762 763 s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 764 if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) 765 s = runtime->oss.maxfrags; 766 if (oss_periods > s) 767 oss_periods = s; 768 769 s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); 770 if (s < 2) 771 s = 2; 772 if (oss_periods < s) 773 oss_periods = s; 774 775 while (oss_period_size * oss_periods > oss_buffer_size) 776 oss_period_size /= 2; 777 778 if (oss_period_size < 16) 779 return -EINVAL; 780 runtime->oss.period_bytes = oss_period_size; 781 runtime->oss.period_frames = 1; 782 runtime->oss.periods = oss_periods; 783 return 0; 784 } 785 786 static int choose_rate(struct snd_pcm_substream *substream, 787 struct snd_pcm_hw_params *params, unsigned int best_rate) 788 { 789 const struct snd_interval *it; 790 struct snd_pcm_hw_params *save; 791 unsigned int rate, prev; 792 793 save = kmalloc(sizeof(*save), GFP_KERNEL); 794 if (save == NULL) 795 return -ENOMEM; 796 *save = *params; 797 it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE); 798 799 /* try multiples of the best rate */ 800 rate = best_rate; 801 for (;;) { 802 if (it->max < rate || (it->max == rate && it->openmax)) 803 break; 804 if (it->min < rate || (it->min == rate && !it->openmin)) { 805 int ret; 806 ret = snd_pcm_hw_param_set(substream, params, 807 SNDRV_PCM_HW_PARAM_RATE, 808 rate, 0); 809 if (ret == (int)rate) { 810 kfree(save); 811 return rate; 812 } 813 *params = *save; 814 } 815 prev = rate; 816 rate += best_rate; 817 if (rate <= prev) 818 break; 819 } 820 821 /* not found, use the nearest rate */ 822 kfree(save); 823 return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); 824 } 825 826 /* parameter locking: returns immediately if tried during streaming */ 827 static int lock_params(struct snd_pcm_runtime *runtime) 828 { 829 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 830 return -ERESTARTSYS; 831 if (atomic_read(&runtime->oss.rw_ref)) { 832 mutex_unlock(&runtime->oss.params_lock); 833 return -EBUSY; 834 } 835 return 0; 836 } 837 838 static void unlock_params(struct snd_pcm_runtime *runtime) 839 { 840 mutex_unlock(&runtime->oss.params_lock); 841 } 842 843 /* call with params_lock held */ 844 static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream) 845 { 846 struct snd_pcm_runtime *runtime = substream->runtime; 847 struct snd_pcm_hw_params *params, *sparams; 848 struct snd_pcm_sw_params *sw_params; 849 ssize_t oss_buffer_size, oss_period_size; 850 size_t oss_frame_size; 851 int err; 852 int direct; 853 snd_pcm_format_t format, sformat; 854 int n; 855 const struct snd_mask *sformat_mask; 856 struct snd_mask mask; 857 858 if (!runtime->oss.params) 859 return 0; 860 sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL); 861 params = kmalloc(sizeof(*params), GFP_KERNEL); 862 sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); 863 if (!sw_params || !params || !sparams) { 864 err = -ENOMEM; 865 goto failure; 866 } 867 868 if (atomic_read(&substream->mmap_count)) 869 direct = 1; 870 else 871 direct = substream->oss.setup.direct; 872 873 _snd_pcm_hw_params_any(sparams); 874 _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); 875 _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); 876 snd_mask_none(&mask); 877 if (atomic_read(&substream->mmap_count)) 878 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); 879 else { 880 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED); 881 if (!direct) 882 snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); 883 } 884 err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); 885 if (err < 0) { 886 pcm_dbg(substream->pcm, "No usable accesses\n"); 887 err = -EINVAL; 888 goto failure; 889 } 890 choose_rate(substream, sparams, runtime->oss.rate); 891 snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); 892 893 format = snd_pcm_oss_format_from(runtime->oss.format); 894 895 sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT); 896 if (direct) 897 sformat = format; 898 else 899 sformat = snd_pcm_plug_slave_format(format, sformat_mask); 900 901 if ((__force int)sformat < 0 || 902 !snd_mask_test(sformat_mask, (__force int)sformat)) { 903 for (sformat = (__force snd_pcm_format_t)0; 904 (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST; 905 sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) { 906 if (snd_mask_test(sformat_mask, (__force int)sformat) && 907 snd_pcm_oss_format_to(sformat) >= 0) 908 break; 909 } 910 if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) { 911 pcm_dbg(substream->pcm, "Cannot find a format!!!\n"); 912 err = -EINVAL; 913 goto failure; 914 } 915 } 916 err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0); 917 if (err < 0) 918 goto failure; 919 920 if (direct) { 921 memcpy(params, sparams, sizeof(*params)); 922 } else { 923 _snd_pcm_hw_params_any(params); 924 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, 925 (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); 926 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, 927 (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0); 928 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, 929 runtime->oss.channels, 0); 930 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, 931 runtime->oss.rate, 0); 932 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", 933 params_access(params), params_format(params), 934 params_channels(params), params_rate(params)); 935 } 936 pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", 937 params_access(sparams), params_format(sparams), 938 params_channels(sparams), params_rate(sparams)); 939 940 oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * 941 params_channels(params) / 8; 942 943 err = snd_pcm_oss_period_size(substream, params, sparams); 944 if (err < 0) 945 goto failure; 946 947 n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); 948 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); 949 if (err < 0) 950 goto failure; 951 952 err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, 953 runtime->oss.periods, NULL); 954 if (err < 0) 955 goto failure; 956 957 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 958 959 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams); 960 if (err < 0) { 961 pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err); 962 goto failure; 963 } 964 965 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 966 snd_pcm_oss_plugin_clear(substream); 967 if (!direct) { 968 /* add necessary plugins */ 969 snd_pcm_oss_plugin_clear(substream); 970 if ((err = snd_pcm_plug_format_plugins(substream, 971 params, 972 sparams)) < 0) { 973 pcm_dbg(substream->pcm, 974 "snd_pcm_plug_format_plugins failed: %i\n", err); 975 snd_pcm_oss_plugin_clear(substream); 976 goto failure; 977 } 978 if (runtime->oss.plugin_first) { 979 struct snd_pcm_plugin *plugin; 980 if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { 981 pcm_dbg(substream->pcm, 982 "snd_pcm_plugin_build_io failed: %i\n", err); 983 snd_pcm_oss_plugin_clear(substream); 984 goto failure; 985 } 986 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 987 err = snd_pcm_plugin_append(plugin); 988 } else { 989 err = snd_pcm_plugin_insert(plugin); 990 } 991 if (err < 0) { 992 snd_pcm_oss_plugin_clear(substream); 993 goto failure; 994 } 995 } 996 } 997 #endif 998 999 if (runtime->oss.trigger) { 1000 sw_params->start_threshold = 1; 1001 } else { 1002 sw_params->start_threshold = runtime->boundary; 1003 } 1004 if (atomic_read(&substream->mmap_count) || 1005 substream->stream == SNDRV_PCM_STREAM_CAPTURE) 1006 sw_params->stop_threshold = runtime->boundary; 1007 else 1008 sw_params->stop_threshold = runtime->buffer_size; 1009 sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; 1010 sw_params->period_step = 1; 1011 sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 1012 1 : runtime->period_size; 1013 if (atomic_read(&substream->mmap_count) || 1014 substream->oss.setup.nosilence) { 1015 sw_params->silence_threshold = 0; 1016 sw_params->silence_size = 0; 1017 } else { 1018 snd_pcm_uframes_t frames; 1019 frames = runtime->period_size + 16; 1020 if (frames > runtime->buffer_size) 1021 frames = runtime->buffer_size; 1022 sw_params->silence_threshold = frames; 1023 sw_params->silence_size = frames; 1024 } 1025 1026 if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { 1027 pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err); 1028 goto failure; 1029 } 1030 1031 runtime->oss.periods = params_periods(sparams); 1032 oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); 1033 if (oss_period_size < 0) { 1034 err = -EINVAL; 1035 goto failure; 1036 } 1037 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1038 if (runtime->oss.plugin_first) { 1039 err = snd_pcm_plug_alloc(substream, oss_period_size); 1040 if (err < 0) 1041 goto failure; 1042 } 1043 #endif 1044 oss_period_size *= oss_frame_size; 1045 1046 oss_buffer_size = oss_period_size * runtime->oss.periods; 1047 if (oss_buffer_size < 0) { 1048 err = -EINVAL; 1049 goto failure; 1050 } 1051 1052 runtime->oss.period_bytes = oss_period_size; 1053 runtime->oss.buffer_bytes = oss_buffer_size; 1054 1055 pdprintf("oss: period bytes = %i, buffer bytes = %i\n", 1056 runtime->oss.period_bytes, 1057 runtime->oss.buffer_bytes); 1058 pdprintf("slave: period_size = %i, buffer_size = %i\n", 1059 params_period_size(sparams), 1060 params_buffer_size(sparams)); 1061 1062 runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); 1063 runtime->oss.channels = params_channels(params); 1064 runtime->oss.rate = params_rate(params); 1065 1066 kvfree(runtime->oss.buffer); 1067 runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL); 1068 if (!runtime->oss.buffer) { 1069 err = -ENOMEM; 1070 goto failure; 1071 } 1072 1073 runtime->oss.params = 0; 1074 runtime->oss.prepare = 1; 1075 runtime->oss.buffer_used = 0; 1076 if (runtime->dma_area) 1077 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); 1078 1079 runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); 1080 1081 err = 0; 1082 failure: 1083 kfree(sw_params); 1084 kfree(params); 1085 kfree(sparams); 1086 return err; 1087 } 1088 1089 /* this one takes the lock by itself */ 1090 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream, 1091 bool trylock) 1092 { 1093 struct snd_pcm_runtime *runtime = substream->runtime; 1094 int err; 1095 1096 if (trylock) { 1097 if (!(mutex_trylock(&runtime->oss.params_lock))) 1098 return -EAGAIN; 1099 } else if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1100 return -ERESTARTSYS; 1101 1102 err = snd_pcm_oss_change_params_locked(substream); 1103 mutex_unlock(&runtime->oss.params_lock); 1104 return err; 1105 } 1106 1107 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream) 1108 { 1109 int idx, err; 1110 struct snd_pcm_substream *asubstream = NULL, *substream; 1111 1112 for (idx = 0; idx < 2; idx++) { 1113 substream = pcm_oss_file->streams[idx]; 1114 if (substream == NULL) 1115 continue; 1116 if (asubstream == NULL) 1117 asubstream = substream; 1118 if (substream->runtime->oss.params) { 1119 err = snd_pcm_oss_change_params(substream, false); 1120 if (err < 0) 1121 return err; 1122 } 1123 } 1124 if (!asubstream) 1125 return -EIO; 1126 if (r_substream) 1127 *r_substream = asubstream; 1128 return 0; 1129 } 1130 1131 /* call with params_lock held */ 1132 /* NOTE: this always call PREPARE unconditionally no matter whether 1133 * runtime->oss.prepare is set or not 1134 */ 1135 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream) 1136 { 1137 int err; 1138 struct snd_pcm_runtime *runtime = substream->runtime; 1139 1140 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); 1141 if (err < 0) { 1142 pcm_dbg(substream->pcm, 1143 "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); 1144 return err; 1145 } 1146 runtime->oss.prepare = 0; 1147 runtime->oss.prev_hw_ptr_period = 0; 1148 runtime->oss.period_ptr = 0; 1149 runtime->oss.buffer_used = 0; 1150 1151 return 0; 1152 } 1153 1154 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream) 1155 { 1156 struct snd_pcm_runtime *runtime; 1157 int err; 1158 1159 runtime = substream->runtime; 1160 if (runtime->oss.params) { 1161 err = snd_pcm_oss_change_params(substream, false); 1162 if (err < 0) 1163 return err; 1164 } 1165 if (runtime->oss.prepare) { 1166 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 1167 return -ERESTARTSYS; 1168 err = snd_pcm_oss_prepare(substream); 1169 mutex_unlock(&runtime->oss.params_lock); 1170 if (err < 0) 1171 return err; 1172 } 1173 return 0; 1174 } 1175 1176 /* call with params_lock held */ 1177 static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream) 1178 { 1179 struct snd_pcm_runtime *runtime; 1180 int err; 1181 1182 runtime = substream->runtime; 1183 if (runtime->oss.params) { 1184 err = snd_pcm_oss_change_params_locked(substream); 1185 if (err < 0) 1186 return err; 1187 } 1188 if (runtime->oss.prepare) { 1189 err = snd_pcm_oss_prepare(substream); 1190 if (err < 0) 1191 return err; 1192 } 1193 return 0; 1194 } 1195 1196 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay) 1197 { 1198 struct snd_pcm_runtime *runtime; 1199 snd_pcm_uframes_t frames; 1200 int err = 0; 1201 1202 while (1) { 1203 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); 1204 if (err < 0) 1205 break; 1206 runtime = substream->runtime; 1207 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) 1208 break; 1209 /* in case of overrun, skip whole periods like OSS/Linux driver does */ 1210 /* until avail(delay) <= buffer_size */ 1211 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; 1212 frames /= runtime->period_size; 1213 frames *= runtime->period_size; 1214 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); 1215 if (err < 0) 1216 break; 1217 } 1218 return err; 1219 } 1220 1221 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1222 { 1223 struct snd_pcm_runtime *runtime = substream->runtime; 1224 int ret; 1225 while (1) { 1226 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1227 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1228 #ifdef OSS_DEBUG 1229 pcm_dbg(substream->pcm, 1230 "pcm_oss: write: recovering from %s\n", 1231 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1232 "XRUN" : "SUSPEND"); 1233 #endif 1234 ret = snd_pcm_oss_prepare(substream); 1235 if (ret < 0) 1236 break; 1237 } 1238 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1239 frames, in_kernel); 1240 if (ret != -EPIPE && ret != -ESTRPIPE) 1241 break; 1242 /* test, if we can't store new data, because the stream */ 1243 /* has not been started */ 1244 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1245 return -EAGAIN; 1246 } 1247 return ret; 1248 } 1249 1250 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) 1251 { 1252 struct snd_pcm_runtime *runtime = substream->runtime; 1253 snd_pcm_sframes_t delay; 1254 int ret; 1255 while (1) { 1256 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1257 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1258 #ifdef OSS_DEBUG 1259 pcm_dbg(substream->pcm, 1260 "pcm_oss: read: recovering from %s\n", 1261 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1262 "XRUN" : "SUSPEND"); 1263 #endif 1264 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1265 if (ret < 0) 1266 break; 1267 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1268 ret = snd_pcm_oss_prepare(substream); 1269 if (ret < 0) 1270 break; 1271 } 1272 ret = snd_pcm_oss_capture_position_fixup(substream, &delay); 1273 if (ret < 0) 1274 break; 1275 ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true, 1276 frames, in_kernel); 1277 if (ret == -EPIPE) { 1278 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 1279 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1280 if (ret < 0) 1281 break; 1282 } 1283 continue; 1284 } 1285 if (ret != -ESTRPIPE) 1286 break; 1287 } 1288 return ret; 1289 } 1290 1291 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1292 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1293 { 1294 struct snd_pcm_runtime *runtime = substream->runtime; 1295 int ret; 1296 while (1) { 1297 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1298 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1299 #ifdef OSS_DEBUG 1300 pcm_dbg(substream->pcm, 1301 "pcm_oss: writev: recovering from %s\n", 1302 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1303 "XRUN" : "SUSPEND"); 1304 #endif 1305 ret = snd_pcm_oss_prepare(substream); 1306 if (ret < 0) 1307 break; 1308 } 1309 ret = snd_pcm_kernel_writev(substream, bufs, frames); 1310 if (ret != -EPIPE && ret != -ESTRPIPE) 1311 break; 1312 1313 /* test, if we can't store new data, because the stream */ 1314 /* has not been started */ 1315 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) 1316 return -EAGAIN; 1317 } 1318 return ret; 1319 } 1320 1321 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames) 1322 { 1323 struct snd_pcm_runtime *runtime = substream->runtime; 1324 int ret; 1325 while (1) { 1326 if (runtime->status->state == SNDRV_PCM_STATE_XRUN || 1327 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { 1328 #ifdef OSS_DEBUG 1329 pcm_dbg(substream->pcm, 1330 "pcm_oss: readv: recovering from %s\n", 1331 runtime->status->state == SNDRV_PCM_STATE_XRUN ? 1332 "XRUN" : "SUSPEND"); 1333 #endif 1334 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1335 if (ret < 0) 1336 break; 1337 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { 1338 ret = snd_pcm_oss_prepare(substream); 1339 if (ret < 0) 1340 break; 1341 } 1342 ret = snd_pcm_kernel_readv(substream, bufs, frames); 1343 if (ret != -EPIPE && ret != -ESTRPIPE) 1344 break; 1345 } 1346 return ret; 1347 } 1348 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */ 1349 1350 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel) 1351 { 1352 struct snd_pcm_runtime *runtime = substream->runtime; 1353 snd_pcm_sframes_t frames, frames1; 1354 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1355 if (runtime->oss.plugin_first) { 1356 struct snd_pcm_plugin_channel *channels; 1357 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; 1358 if (!in_kernel) { 1359 if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes)) 1360 return -EFAULT; 1361 buf = runtime->oss.buffer; 1362 } 1363 frames = bytes / oss_frame_bytes; 1364 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); 1365 if (frames1 < 0) 1366 return frames1; 1367 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); 1368 if (frames1 <= 0) 1369 return frames1; 1370 bytes = frames1 * oss_frame_bytes; 1371 } else 1372 #endif 1373 { 1374 frames = bytes_to_frames(runtime, bytes); 1375 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); 1376 if (frames1 <= 0) 1377 return frames1; 1378 bytes = frames_to_bytes(runtime, frames1); 1379 } 1380 return bytes; 1381 } 1382 1383 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes) 1384 { 1385 size_t xfer = 0; 1386 ssize_t tmp = 0; 1387 struct snd_pcm_runtime *runtime = substream->runtime; 1388 1389 if (atomic_read(&substream->mmap_count)) 1390 return -ENXIO; 1391 1392 atomic_inc(&runtime->oss.rw_ref); 1393 while (bytes > 0) { 1394 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1395 tmp = -ERESTARTSYS; 1396 break; 1397 } 1398 tmp = snd_pcm_oss_make_ready_locked(substream); 1399 if (tmp < 0) 1400 goto err; 1401 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1402 tmp = bytes; 1403 if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) 1404 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; 1405 if (tmp > 0) { 1406 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) { 1407 tmp = -EFAULT; 1408 goto err; 1409 } 1410 } 1411 runtime->oss.buffer_used += tmp; 1412 buf += tmp; 1413 bytes -= tmp; 1414 xfer += tmp; 1415 if (substream->oss.setup.partialfrag || 1416 runtime->oss.buffer_used == runtime->oss.period_bytes) { 1417 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 1418 runtime->oss.buffer_used - runtime->oss.period_ptr, 1); 1419 if (tmp <= 0) 1420 goto err; 1421 runtime->oss.bytes += tmp; 1422 runtime->oss.period_ptr += tmp; 1423 runtime->oss.period_ptr %= runtime->oss.period_bytes; 1424 if (runtime->oss.period_ptr == 0 || 1425 runtime->oss.period_ptr == runtime->oss.buffer_used) 1426 runtime->oss.buffer_used = 0; 1427 else if ((substream->f_flags & O_NONBLOCK) != 0) { 1428 tmp = -EAGAIN; 1429 goto err; 1430 } 1431 } 1432 } else { 1433 tmp = snd_pcm_oss_write2(substream, 1434 (const char __force *)buf, 1435 runtime->oss.period_bytes, 0); 1436 if (tmp <= 0) 1437 goto err; 1438 runtime->oss.bytes += tmp; 1439 buf += tmp; 1440 bytes -= tmp; 1441 xfer += tmp; 1442 if ((substream->f_flags & O_NONBLOCK) != 0 && 1443 tmp != runtime->oss.period_bytes) 1444 tmp = -EAGAIN; 1445 } 1446 err: 1447 mutex_unlock(&runtime->oss.params_lock); 1448 if (tmp < 0) 1449 break; 1450 if (signal_pending(current)) { 1451 tmp = -ERESTARTSYS; 1452 break; 1453 } 1454 tmp = 0; 1455 } 1456 atomic_dec(&runtime->oss.rw_ref); 1457 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1458 } 1459 1460 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel) 1461 { 1462 struct snd_pcm_runtime *runtime = substream->runtime; 1463 snd_pcm_sframes_t frames, frames1; 1464 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 1465 char __user *final_dst = (char __force __user *)buf; 1466 if (runtime->oss.plugin_first) { 1467 struct snd_pcm_plugin_channel *channels; 1468 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; 1469 if (!in_kernel) 1470 buf = runtime->oss.buffer; 1471 frames = bytes / oss_frame_bytes; 1472 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); 1473 if (frames1 < 0) 1474 return frames1; 1475 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); 1476 if (frames1 <= 0) 1477 return frames1; 1478 bytes = frames1 * oss_frame_bytes; 1479 if (!in_kernel && copy_to_user(final_dst, buf, bytes)) 1480 return -EFAULT; 1481 } else 1482 #endif 1483 { 1484 frames = bytes_to_frames(runtime, bytes); 1485 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); 1486 if (frames1 <= 0) 1487 return frames1; 1488 bytes = frames_to_bytes(runtime, frames1); 1489 } 1490 return bytes; 1491 } 1492 1493 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes) 1494 { 1495 size_t xfer = 0; 1496 ssize_t tmp = 0; 1497 struct snd_pcm_runtime *runtime = substream->runtime; 1498 1499 if (atomic_read(&substream->mmap_count)) 1500 return -ENXIO; 1501 1502 atomic_inc(&runtime->oss.rw_ref); 1503 while (bytes > 0) { 1504 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1505 tmp = -ERESTARTSYS; 1506 break; 1507 } 1508 tmp = snd_pcm_oss_make_ready_locked(substream); 1509 if (tmp < 0) 1510 goto err; 1511 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { 1512 if (runtime->oss.buffer_used == 0) { 1513 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); 1514 if (tmp <= 0) 1515 goto err; 1516 runtime->oss.bytes += tmp; 1517 runtime->oss.period_ptr = tmp; 1518 runtime->oss.buffer_used = tmp; 1519 } 1520 tmp = bytes; 1521 if ((size_t) tmp > runtime->oss.buffer_used) 1522 tmp = runtime->oss.buffer_used; 1523 if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) { 1524 tmp = -EFAULT; 1525 goto err; 1526 } 1527 buf += tmp; 1528 bytes -= tmp; 1529 xfer += tmp; 1530 runtime->oss.buffer_used -= tmp; 1531 } else { 1532 tmp = snd_pcm_oss_read2(substream, (char __force *)buf, 1533 runtime->oss.period_bytes, 0); 1534 if (tmp <= 0) 1535 goto err; 1536 runtime->oss.bytes += tmp; 1537 buf += tmp; 1538 bytes -= tmp; 1539 xfer += tmp; 1540 } 1541 err: 1542 mutex_unlock(&runtime->oss.params_lock); 1543 if (tmp < 0) 1544 break; 1545 if (signal_pending(current)) { 1546 tmp = -ERESTARTSYS; 1547 break; 1548 } 1549 tmp = 0; 1550 } 1551 atomic_dec(&runtime->oss.rw_ref); 1552 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; 1553 } 1554 1555 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) 1556 { 1557 struct snd_pcm_substream *substream; 1558 struct snd_pcm_runtime *runtime; 1559 int i; 1560 1561 for (i = 0; i < 2; i++) { 1562 substream = pcm_oss_file->streams[i]; 1563 if (!substream) 1564 continue; 1565 runtime = substream->runtime; 1566 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1567 mutex_lock(&runtime->oss.params_lock); 1568 runtime->oss.prepare = 1; 1569 runtime->oss.buffer_used = 0; 1570 runtime->oss.prev_hw_ptr_period = 0; 1571 runtime->oss.period_ptr = 0; 1572 mutex_unlock(&runtime->oss.params_lock); 1573 } 1574 return 0; 1575 } 1576 1577 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file) 1578 { 1579 struct snd_pcm_substream *substream; 1580 int err; 1581 1582 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1583 if (substream != NULL) { 1584 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1585 return err; 1586 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); 1587 } 1588 /* note: all errors from the start action are ignored */ 1589 /* OSS apps do not know, how to handle them */ 1590 return 0; 1591 } 1592 1593 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size) 1594 { 1595 struct snd_pcm_runtime *runtime; 1596 ssize_t result = 0; 1597 snd_pcm_state_t state; 1598 long res; 1599 wait_queue_entry_t wait; 1600 1601 runtime = substream->runtime; 1602 init_waitqueue_entry(&wait, current); 1603 add_wait_queue(&runtime->sleep, &wait); 1604 #ifdef OSS_DEBUG 1605 pcm_dbg(substream->pcm, "sync1: size = %li\n", size); 1606 #endif 1607 while (1) { 1608 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); 1609 if (result > 0) { 1610 runtime->oss.buffer_used = 0; 1611 result = 0; 1612 break; 1613 } 1614 if (result != 0 && result != -EAGAIN) 1615 break; 1616 result = 0; 1617 set_current_state(TASK_INTERRUPTIBLE); 1618 snd_pcm_stream_lock_irq(substream); 1619 state = runtime->status->state; 1620 snd_pcm_stream_unlock_irq(substream); 1621 if (state != SNDRV_PCM_STATE_RUNNING) { 1622 set_current_state(TASK_RUNNING); 1623 break; 1624 } 1625 res = schedule_timeout(10 * HZ); 1626 if (signal_pending(current)) { 1627 result = -ERESTARTSYS; 1628 break; 1629 } 1630 if (res == 0) { 1631 pcm_err(substream->pcm, 1632 "OSS sync error - DMA timeout\n"); 1633 result = -EIO; 1634 break; 1635 } 1636 } 1637 remove_wait_queue(&runtime->sleep, &wait); 1638 return result; 1639 } 1640 1641 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file) 1642 { 1643 int err = 0; 1644 unsigned int saved_f_flags; 1645 struct snd_pcm_substream *substream; 1646 struct snd_pcm_runtime *runtime; 1647 snd_pcm_format_t format; 1648 unsigned long width; 1649 size_t size; 1650 1651 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 1652 if (substream != NULL) { 1653 runtime = substream->runtime; 1654 if (atomic_read(&substream->mmap_count)) 1655 goto __direct; 1656 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1657 return err; 1658 atomic_inc(&runtime->oss.rw_ref); 1659 if (mutex_lock_interruptible(&runtime->oss.params_lock)) { 1660 atomic_dec(&runtime->oss.rw_ref); 1661 return -ERESTARTSYS; 1662 } 1663 format = snd_pcm_oss_format_from(runtime->oss.format); 1664 width = snd_pcm_format_physical_width(format); 1665 if (runtime->oss.buffer_used > 0) { 1666 #ifdef OSS_DEBUG 1667 pcm_dbg(substream->pcm, "sync: buffer_used\n"); 1668 #endif 1669 size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; 1670 snd_pcm_format_set_silence(format, 1671 runtime->oss.buffer + runtime->oss.buffer_used, 1672 size); 1673 err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); 1674 if (err < 0) 1675 goto unlock; 1676 } else if (runtime->oss.period_ptr > 0) { 1677 #ifdef OSS_DEBUG 1678 pcm_dbg(substream->pcm, "sync: period_ptr\n"); 1679 #endif 1680 size = runtime->oss.period_bytes - runtime->oss.period_ptr; 1681 snd_pcm_format_set_silence(format, 1682 runtime->oss.buffer, 1683 size * 8 / width); 1684 err = snd_pcm_oss_sync1(substream, size); 1685 if (err < 0) 1686 goto unlock; 1687 } 1688 /* 1689 * The ALSA's period might be a bit large than OSS one. 1690 * Fill the remain portion of ALSA period with zeros. 1691 */ 1692 size = runtime->control->appl_ptr % runtime->period_size; 1693 if (size > 0) { 1694 size = runtime->period_size - size; 1695 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) 1696 snd_pcm_lib_write(substream, NULL, size); 1697 else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 1698 snd_pcm_lib_writev(substream, NULL, size); 1699 } 1700 unlock: 1701 mutex_unlock(&runtime->oss.params_lock); 1702 atomic_dec(&runtime->oss.rw_ref); 1703 if (err < 0) 1704 return err; 1705 /* 1706 * finish sync: drain the buffer 1707 */ 1708 __direct: 1709 saved_f_flags = substream->f_flags; 1710 substream->f_flags &= ~O_NONBLOCK; 1711 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); 1712 substream->f_flags = saved_f_flags; 1713 if (err < 0) 1714 return err; 1715 mutex_lock(&runtime->oss.params_lock); 1716 runtime->oss.prepare = 1; 1717 mutex_unlock(&runtime->oss.params_lock); 1718 } 1719 1720 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 1721 if (substream != NULL) { 1722 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 1723 return err; 1724 runtime = substream->runtime; 1725 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); 1726 if (err < 0) 1727 return err; 1728 mutex_lock(&runtime->oss.params_lock); 1729 runtime->oss.buffer_used = 0; 1730 runtime->oss.prepare = 1; 1731 mutex_unlock(&runtime->oss.params_lock); 1732 } 1733 return 0; 1734 } 1735 1736 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate) 1737 { 1738 int idx; 1739 1740 for (idx = 1; idx >= 0; --idx) { 1741 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1742 struct snd_pcm_runtime *runtime; 1743 int err; 1744 1745 if (substream == NULL) 1746 continue; 1747 runtime = substream->runtime; 1748 if (rate < 1000) 1749 rate = 1000; 1750 else if (rate > 192000) 1751 rate = 192000; 1752 err = lock_params(runtime); 1753 if (err < 0) 1754 return err; 1755 if (runtime->oss.rate != rate) { 1756 runtime->oss.params = 1; 1757 runtime->oss.rate = rate; 1758 } 1759 unlock_params(runtime); 1760 } 1761 return snd_pcm_oss_get_rate(pcm_oss_file); 1762 } 1763 1764 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file) 1765 { 1766 struct snd_pcm_substream *substream; 1767 int err; 1768 1769 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1770 return err; 1771 return substream->runtime->oss.rate; 1772 } 1773 1774 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels) 1775 { 1776 int idx; 1777 if (channels < 1) 1778 channels = 1; 1779 if (channels > 128) 1780 return -EINVAL; 1781 for (idx = 1; idx >= 0; --idx) { 1782 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1783 struct snd_pcm_runtime *runtime; 1784 int err; 1785 1786 if (substream == NULL) 1787 continue; 1788 runtime = substream->runtime; 1789 err = lock_params(runtime); 1790 if (err < 0) 1791 return err; 1792 if (runtime->oss.channels != channels) { 1793 runtime->oss.params = 1; 1794 runtime->oss.channels = channels; 1795 } 1796 unlock_params(runtime); 1797 } 1798 return snd_pcm_oss_get_channels(pcm_oss_file); 1799 } 1800 1801 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file) 1802 { 1803 struct snd_pcm_substream *substream; 1804 int err; 1805 1806 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1807 return err; 1808 return substream->runtime->oss.channels; 1809 } 1810 1811 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file) 1812 { 1813 struct snd_pcm_substream *substream; 1814 int err; 1815 1816 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1817 return err; 1818 return substream->runtime->oss.period_bytes; 1819 } 1820 1821 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file) 1822 { 1823 struct snd_pcm_substream *substream; 1824 int err; 1825 int direct; 1826 struct snd_pcm_hw_params *params; 1827 unsigned int formats = 0; 1828 const struct snd_mask *format_mask; 1829 int fmt; 1830 1831 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1832 return err; 1833 if (atomic_read(&substream->mmap_count)) 1834 direct = 1; 1835 else 1836 direct = substream->oss.setup.direct; 1837 if (!direct) 1838 return AFMT_MU_LAW | AFMT_U8 | 1839 AFMT_S16_LE | AFMT_S16_BE | 1840 AFMT_S8 | AFMT_U16_LE | 1841 AFMT_U16_BE | 1842 AFMT_S32_LE | AFMT_S32_BE | 1843 AFMT_S24_LE | AFMT_S24_BE | 1844 AFMT_S24_PACKED; 1845 params = kmalloc(sizeof(*params), GFP_KERNEL); 1846 if (!params) 1847 return -ENOMEM; 1848 _snd_pcm_hw_params_any(params); 1849 err = snd_pcm_hw_refine(substream, params); 1850 if (err < 0) 1851 goto error; 1852 format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT); 1853 for (fmt = 0; fmt < 32; ++fmt) { 1854 if (snd_mask_test(format_mask, fmt)) { 1855 int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt); 1856 if (f >= 0) 1857 formats |= f; 1858 } 1859 } 1860 1861 error: 1862 kfree(params); 1863 return err < 0 ? err : formats; 1864 } 1865 1866 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format) 1867 { 1868 int formats, idx; 1869 int err; 1870 1871 if (format != AFMT_QUERY) { 1872 formats = snd_pcm_oss_get_formats(pcm_oss_file); 1873 if (formats < 0) 1874 return formats; 1875 if (!(formats & format)) 1876 format = AFMT_U8; 1877 for (idx = 1; idx >= 0; --idx) { 1878 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1879 struct snd_pcm_runtime *runtime; 1880 if (substream == NULL) 1881 continue; 1882 runtime = substream->runtime; 1883 err = lock_params(runtime); 1884 if (err < 0) 1885 return err; 1886 if (runtime->oss.format != format) { 1887 runtime->oss.params = 1; 1888 runtime->oss.format = format; 1889 } 1890 unlock_params(runtime); 1891 } 1892 } 1893 return snd_pcm_oss_get_format(pcm_oss_file); 1894 } 1895 1896 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file) 1897 { 1898 struct snd_pcm_substream *substream; 1899 int err; 1900 1901 if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) 1902 return err; 1903 return substream->runtime->oss.format; 1904 } 1905 1906 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide) 1907 { 1908 struct snd_pcm_runtime *runtime; 1909 1910 runtime = substream->runtime; 1911 if (subdivide == 0) { 1912 subdivide = runtime->oss.subdivision; 1913 if (subdivide == 0) 1914 subdivide = 1; 1915 return subdivide; 1916 } 1917 if (runtime->oss.subdivision || runtime->oss.fragshift) 1918 return -EINVAL; 1919 if (subdivide != 1 && subdivide != 2 && subdivide != 4 && 1920 subdivide != 8 && subdivide != 16) 1921 return -EINVAL; 1922 runtime->oss.subdivision = subdivide; 1923 runtime->oss.params = 1; 1924 return subdivide; 1925 } 1926 1927 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide) 1928 { 1929 int err = -EINVAL, idx; 1930 1931 for (idx = 1; idx >= 0; --idx) { 1932 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1933 struct snd_pcm_runtime *runtime; 1934 1935 if (substream == NULL) 1936 continue; 1937 runtime = substream->runtime; 1938 err = lock_params(runtime); 1939 if (err < 0) 1940 return err; 1941 err = snd_pcm_oss_set_subdivide1(substream, subdivide); 1942 unlock_params(runtime); 1943 if (err < 0) 1944 return err; 1945 } 1946 return err; 1947 } 1948 1949 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val) 1950 { 1951 struct snd_pcm_runtime *runtime; 1952 1953 runtime = substream->runtime; 1954 if (runtime->oss.subdivision || runtime->oss.fragshift) 1955 return -EINVAL; 1956 runtime->oss.fragshift = val & 0xffff; 1957 runtime->oss.maxfrags = (val >> 16) & 0xffff; 1958 if (runtime->oss.fragshift < 4) /* < 16 */ 1959 runtime->oss.fragshift = 4; 1960 if (runtime->oss.maxfrags < 2) 1961 runtime->oss.maxfrags = 2; 1962 runtime->oss.params = 1; 1963 return 0; 1964 } 1965 1966 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val) 1967 { 1968 int err = -EINVAL, idx; 1969 1970 for (idx = 1; idx >= 0; --idx) { 1971 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 1972 struct snd_pcm_runtime *runtime; 1973 1974 if (substream == NULL) 1975 continue; 1976 runtime = substream->runtime; 1977 err = lock_params(runtime); 1978 if (err < 0) 1979 return err; 1980 err = snd_pcm_oss_set_fragment1(substream, val); 1981 unlock_params(runtime); 1982 if (err < 0) 1983 return err; 1984 } 1985 return err; 1986 } 1987 1988 static int snd_pcm_oss_nonblock(struct file * file) 1989 { 1990 spin_lock(&file->f_lock); 1991 file->f_flags |= O_NONBLOCK; 1992 spin_unlock(&file->f_lock); 1993 return 0; 1994 } 1995 1996 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res) 1997 { 1998 1999 if (substream == NULL) { 2000 res &= ~DSP_CAP_DUPLEX; 2001 return res; 2002 } 2003 #ifdef DSP_CAP_MULTI 2004 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2005 if (substream->pstr->substream_count > 1) 2006 res |= DSP_CAP_MULTI; 2007 #endif 2008 /* DSP_CAP_REALTIME is set all times: */ 2009 /* all ALSA drivers can return actual pointer in ring buffer */ 2010 #if defined(DSP_CAP_REALTIME) && 0 2011 { 2012 struct snd_pcm_runtime *runtime = substream->runtime; 2013 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) 2014 res &= ~DSP_CAP_REALTIME; 2015 } 2016 #endif 2017 return res; 2018 } 2019 2020 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file) 2021 { 2022 int result, idx; 2023 2024 result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; 2025 for (idx = 0; idx < 2; idx++) { 2026 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx]; 2027 result = snd_pcm_oss_get_caps1(substream, result); 2028 } 2029 result |= 0x0001; /* revision - same as SB AWE 64 */ 2030 return result; 2031 } 2032 2033 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, 2034 snd_pcm_uframes_t hw_ptr) 2035 { 2036 struct snd_pcm_runtime *runtime = substream->runtime; 2037 snd_pcm_uframes_t appl_ptr; 2038 appl_ptr = hw_ptr + runtime->buffer_size; 2039 appl_ptr %= runtime->boundary; 2040 runtime->control->appl_ptr = appl_ptr; 2041 } 2042 2043 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger) 2044 { 2045 struct snd_pcm_runtime *runtime; 2046 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2047 int err, cmd; 2048 2049 #ifdef OSS_DEBUG 2050 pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger); 2051 #endif 2052 2053 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2054 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2055 2056 if (psubstream) { 2057 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) 2058 return err; 2059 } 2060 if (csubstream) { 2061 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) 2062 return err; 2063 } 2064 if (psubstream) { 2065 runtime = psubstream->runtime; 2066 cmd = 0; 2067 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2068 return -ERESTARTSYS; 2069 if (trigger & PCM_ENABLE_OUTPUT) { 2070 if (runtime->oss.trigger) 2071 goto _skip1; 2072 if (atomic_read(&psubstream->mmap_count)) 2073 snd_pcm_oss_simulate_fill(psubstream, 2074 get_hw_ptr_period(runtime)); 2075 runtime->oss.trigger = 1; 2076 runtime->start_threshold = 1; 2077 cmd = SNDRV_PCM_IOCTL_START; 2078 } else { 2079 if (!runtime->oss.trigger) 2080 goto _skip1; 2081 runtime->oss.trigger = 0; 2082 runtime->start_threshold = runtime->boundary; 2083 cmd = SNDRV_PCM_IOCTL_DROP; 2084 runtime->oss.prepare = 1; 2085 } 2086 _skip1: 2087 mutex_unlock(&runtime->oss.params_lock); 2088 if (cmd) { 2089 err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL); 2090 if (err < 0) 2091 return err; 2092 } 2093 } 2094 if (csubstream) { 2095 runtime = csubstream->runtime; 2096 cmd = 0; 2097 if (mutex_lock_interruptible(&runtime->oss.params_lock)) 2098 return -ERESTARTSYS; 2099 if (trigger & PCM_ENABLE_INPUT) { 2100 if (runtime->oss.trigger) 2101 goto _skip2; 2102 runtime->oss.trigger = 1; 2103 runtime->start_threshold = 1; 2104 cmd = SNDRV_PCM_IOCTL_START; 2105 } else { 2106 if (!runtime->oss.trigger) 2107 goto _skip2; 2108 runtime->oss.trigger = 0; 2109 runtime->start_threshold = runtime->boundary; 2110 cmd = SNDRV_PCM_IOCTL_DROP; 2111 runtime->oss.prepare = 1; 2112 } 2113 _skip2: 2114 mutex_unlock(&runtime->oss.params_lock); 2115 if (cmd) { 2116 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL); 2117 if (err < 0) 2118 return err; 2119 } 2120 } 2121 return 0; 2122 } 2123 2124 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file) 2125 { 2126 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2127 int result = 0; 2128 2129 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2130 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2131 if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) 2132 result |= PCM_ENABLE_OUTPUT; 2133 if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) 2134 result |= PCM_ENABLE_INPUT; 2135 return result; 2136 } 2137 2138 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file) 2139 { 2140 struct snd_pcm_substream *substream; 2141 struct snd_pcm_runtime *runtime; 2142 snd_pcm_sframes_t delay; 2143 int err; 2144 2145 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2146 if (substream == NULL) 2147 return -EINVAL; 2148 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2149 return err; 2150 runtime = substream->runtime; 2151 if (runtime->oss.params || runtime->oss.prepare) 2152 return 0; 2153 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2154 if (err == -EPIPE) 2155 delay = 0; /* hack for broken OSS applications */ 2156 else if (err < 0) 2157 return err; 2158 return snd_pcm_oss_bytes(substream, delay); 2159 } 2160 2161 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info) 2162 { 2163 struct snd_pcm_substream *substream; 2164 struct snd_pcm_runtime *runtime; 2165 snd_pcm_sframes_t delay; 2166 int fixup; 2167 struct count_info info; 2168 int err; 2169 2170 if (_info == NULL) 2171 return -EFAULT; 2172 substream = pcm_oss_file->streams[stream]; 2173 if (substream == NULL) 2174 return -EINVAL; 2175 if ((err = snd_pcm_oss_make_ready(substream)) < 0) 2176 return err; 2177 runtime = substream->runtime; 2178 if (runtime->oss.params || runtime->oss.prepare) { 2179 memset(&info, 0, sizeof(info)); 2180 if (copy_to_user(_info, &info, sizeof(info))) 2181 return -EFAULT; 2182 return 0; 2183 } 2184 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2185 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); 2186 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { 2187 err = 0; 2188 delay = 0; 2189 fixup = 0; 2190 } else { 2191 fixup = runtime->oss.buffer_used; 2192 } 2193 } else { 2194 err = snd_pcm_oss_capture_position_fixup(substream, &delay); 2195 fixup = -runtime->oss.buffer_used; 2196 } 2197 if (err < 0) 2198 return err; 2199 info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); 2200 if (atomic_read(&substream->mmap_count)) { 2201 snd_pcm_sframes_t n; 2202 delay = get_hw_ptr_period(runtime); 2203 n = delay - runtime->oss.prev_hw_ptr_period; 2204 if (n < 0) 2205 n += runtime->boundary; 2206 info.blocks = n / runtime->period_size; 2207 runtime->oss.prev_hw_ptr_period = delay; 2208 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2209 snd_pcm_oss_simulate_fill(substream, delay); 2210 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; 2211 } else { 2212 delay = snd_pcm_oss_bytes(substream, delay); 2213 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2214 if (substream->oss.setup.buggyptr) 2215 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes; 2216 else 2217 info.blocks = (delay + fixup) / runtime->oss.period_bytes; 2218 info.bytes = (runtime->oss.bytes - delay) & INT_MAX; 2219 } else { 2220 delay += fixup; 2221 info.blocks = delay / runtime->oss.period_bytes; 2222 info.bytes = (runtime->oss.bytes + delay) & INT_MAX; 2223 } 2224 } 2225 if (copy_to_user(_info, &info, sizeof(info))) 2226 return -EFAULT; 2227 return 0; 2228 } 2229 2230 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info) 2231 { 2232 struct snd_pcm_substream *substream; 2233 struct snd_pcm_runtime *runtime; 2234 snd_pcm_sframes_t avail; 2235 int fixup; 2236 struct audio_buf_info info; 2237 int err; 2238 2239 if (_info == NULL) 2240 return -EFAULT; 2241 substream = pcm_oss_file->streams[stream]; 2242 if (substream == NULL) 2243 return -EINVAL; 2244 runtime = substream->runtime; 2245 2246 if (runtime->oss.params && 2247 (err = snd_pcm_oss_change_params(substream, false)) < 0) 2248 return err; 2249 2250 info.fragsize = runtime->oss.period_bytes; 2251 info.fragstotal = runtime->periods; 2252 if (runtime->oss.prepare) { 2253 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2254 info.bytes = runtime->oss.period_bytes * runtime->oss.periods; 2255 info.fragments = runtime->oss.periods; 2256 } else { 2257 info.bytes = 0; 2258 info.fragments = 0; 2259 } 2260 } else { 2261 if (stream == SNDRV_PCM_STREAM_PLAYBACK) { 2262 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); 2263 if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { 2264 avail = runtime->buffer_size; 2265 err = 0; 2266 fixup = 0; 2267 } else { 2268 avail = runtime->buffer_size - avail; 2269 fixup = -runtime->oss.buffer_used; 2270 } 2271 } else { 2272 err = snd_pcm_oss_capture_position_fixup(substream, &avail); 2273 fixup = runtime->oss.buffer_used; 2274 } 2275 if (err < 0) 2276 return err; 2277 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; 2278 info.fragments = info.bytes / runtime->oss.period_bytes; 2279 } 2280 2281 #ifdef OSS_DEBUG 2282 pcm_dbg(substream->pcm, 2283 "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", 2284 info.bytes, info.fragments, info.fragstotal, info.fragsize); 2285 #endif 2286 if (copy_to_user(_info, &info, sizeof(info))) 2287 return -EFAULT; 2288 return 0; 2289 } 2290 2291 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info) 2292 { 2293 // it won't be probably implemented 2294 // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n"); 2295 return -EINVAL; 2296 } 2297 2298 static const char *strip_task_path(const char *path) 2299 { 2300 const char *ptr, *ptrl = NULL; 2301 for (ptr = path; *ptr; ptr++) { 2302 if (*ptr == '/') 2303 ptrl = ptr + 1; 2304 } 2305 return ptrl; 2306 } 2307 2308 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, 2309 const char *task_name, 2310 struct snd_pcm_oss_setup *rsetup) 2311 { 2312 struct snd_pcm_oss_setup *setup; 2313 2314 mutex_lock(&pcm->streams[stream].oss.setup_mutex); 2315 do { 2316 for (setup = pcm->streams[stream].oss.setup_list; setup; 2317 setup = setup->next) { 2318 if (!strcmp(setup->task_name, task_name)) 2319 goto out; 2320 } 2321 } while ((task_name = strip_task_path(task_name)) != NULL); 2322 out: 2323 if (setup) 2324 *rsetup = *setup; 2325 mutex_unlock(&pcm->streams[stream].oss.setup_mutex); 2326 } 2327 2328 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream) 2329 { 2330 struct snd_pcm_runtime *runtime; 2331 runtime = substream->runtime; 2332 kvfree(runtime->oss.buffer); 2333 runtime->oss.buffer = NULL; 2334 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2335 snd_pcm_oss_plugin_clear(substream); 2336 #endif 2337 substream->oss.oss = 0; 2338 } 2339 2340 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream, 2341 struct snd_pcm_oss_setup *setup, 2342 int minor) 2343 { 2344 struct snd_pcm_runtime *runtime; 2345 2346 substream->oss.oss = 1; 2347 substream->oss.setup = *setup; 2348 if (setup->nonblock) 2349 substream->f_flags |= O_NONBLOCK; 2350 else if (setup->block) 2351 substream->f_flags &= ~O_NONBLOCK; 2352 runtime = substream->runtime; 2353 runtime->oss.params = 1; 2354 runtime->oss.trigger = 1; 2355 runtime->oss.rate = 8000; 2356 mutex_init(&runtime->oss.params_lock); 2357 switch (SNDRV_MINOR_OSS_DEVICE(minor)) { 2358 case SNDRV_MINOR_OSS_PCM_8: 2359 runtime->oss.format = AFMT_U8; 2360 break; 2361 case SNDRV_MINOR_OSS_PCM_16: 2362 runtime->oss.format = AFMT_S16_LE; 2363 break; 2364 default: 2365 runtime->oss.format = AFMT_MU_LAW; 2366 } 2367 runtime->oss.channels = 1; 2368 runtime->oss.fragshift = 0; 2369 runtime->oss.maxfrags = 0; 2370 runtime->oss.subdivision = 0; 2371 substream->pcm_release = snd_pcm_oss_release_substream; 2372 atomic_set(&runtime->oss.rw_ref, 0); 2373 } 2374 2375 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file) 2376 { 2377 int cidx; 2378 if (!pcm_oss_file) 2379 return 0; 2380 for (cidx = 0; cidx < 2; ++cidx) { 2381 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx]; 2382 if (substream) 2383 snd_pcm_release_substream(substream); 2384 } 2385 kfree(pcm_oss_file); 2386 return 0; 2387 } 2388 2389 static int snd_pcm_oss_open_file(struct file *file, 2390 struct snd_pcm *pcm, 2391 struct snd_pcm_oss_file **rpcm_oss_file, 2392 int minor, 2393 struct snd_pcm_oss_setup *setup) 2394 { 2395 int idx, err; 2396 struct snd_pcm_oss_file *pcm_oss_file; 2397 struct snd_pcm_substream *substream; 2398 fmode_t f_mode = file->f_mode; 2399 2400 if (rpcm_oss_file) 2401 *rpcm_oss_file = NULL; 2402 2403 pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL); 2404 if (pcm_oss_file == NULL) 2405 return -ENOMEM; 2406 2407 if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && 2408 (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) 2409 f_mode = FMODE_WRITE; 2410 2411 file->f_flags &= ~O_APPEND; 2412 for (idx = 0; idx < 2; idx++) { 2413 if (setup[idx].disable) 2414 continue; 2415 if (! pcm->streams[idx].substream_count) 2416 continue; /* no matching substream */ 2417 if (idx == SNDRV_PCM_STREAM_PLAYBACK) { 2418 if (! (f_mode & FMODE_WRITE)) 2419 continue; 2420 } else { 2421 if (! (f_mode & FMODE_READ)) 2422 continue; 2423 } 2424 err = snd_pcm_open_substream(pcm, idx, file, &substream); 2425 if (err < 0) { 2426 snd_pcm_oss_release_file(pcm_oss_file); 2427 return err; 2428 } 2429 2430 pcm_oss_file->streams[idx] = substream; 2431 snd_pcm_oss_init_substream(substream, &setup[idx], minor); 2432 } 2433 2434 if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) { 2435 snd_pcm_oss_release_file(pcm_oss_file); 2436 return -EINVAL; 2437 } 2438 2439 file->private_data = pcm_oss_file; 2440 if (rpcm_oss_file) 2441 *rpcm_oss_file = pcm_oss_file; 2442 return 0; 2443 } 2444 2445 2446 static int snd_task_name(struct task_struct *task, char *name, size_t size) 2447 { 2448 unsigned int idx; 2449 2450 if (snd_BUG_ON(!task || !name || size < 2)) 2451 return -EINVAL; 2452 for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++) 2453 name[idx] = task->comm[idx]; 2454 name[idx] = '\0'; 2455 return 0; 2456 } 2457 2458 static int snd_pcm_oss_open(struct inode *inode, struct file *file) 2459 { 2460 int err; 2461 char task_name[32]; 2462 struct snd_pcm *pcm; 2463 struct snd_pcm_oss_file *pcm_oss_file; 2464 struct snd_pcm_oss_setup setup[2]; 2465 int nonblock; 2466 wait_queue_entry_t wait; 2467 2468 err = nonseekable_open(inode, file); 2469 if (err < 0) 2470 return err; 2471 2472 pcm = snd_lookup_oss_minor_data(iminor(inode), 2473 SNDRV_OSS_DEVICE_TYPE_PCM); 2474 if (pcm == NULL) { 2475 err = -ENODEV; 2476 goto __error1; 2477 } 2478 err = snd_card_file_add(pcm->card, file); 2479 if (err < 0) 2480 goto __error1; 2481 if (!try_module_get(pcm->card->module)) { 2482 err = -EFAULT; 2483 goto __error2; 2484 } 2485 if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { 2486 err = -EFAULT; 2487 goto __error; 2488 } 2489 memset(setup, 0, sizeof(setup)); 2490 if (file->f_mode & FMODE_WRITE) 2491 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, 2492 task_name, &setup[0]); 2493 if (file->f_mode & FMODE_READ) 2494 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, 2495 task_name, &setup[1]); 2496 2497 nonblock = !!(file->f_flags & O_NONBLOCK); 2498 if (!nonblock) 2499 nonblock = nonblock_open; 2500 2501 init_waitqueue_entry(&wait, current); 2502 add_wait_queue(&pcm->open_wait, &wait); 2503 mutex_lock(&pcm->open_mutex); 2504 while (1) { 2505 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, 2506 iminor(inode), setup); 2507 if (err >= 0) 2508 break; 2509 if (err == -EAGAIN) { 2510 if (nonblock) { 2511 err = -EBUSY; 2512 break; 2513 } 2514 } else 2515 break; 2516 set_current_state(TASK_INTERRUPTIBLE); 2517 mutex_unlock(&pcm->open_mutex); 2518 schedule(); 2519 mutex_lock(&pcm->open_mutex); 2520 if (pcm->card->shutdown) { 2521 err = -ENODEV; 2522 break; 2523 } 2524 if (signal_pending(current)) { 2525 err = -ERESTARTSYS; 2526 break; 2527 } 2528 } 2529 remove_wait_queue(&pcm->open_wait, &wait); 2530 mutex_unlock(&pcm->open_mutex); 2531 if (err < 0) 2532 goto __error; 2533 snd_card_unref(pcm->card); 2534 return err; 2535 2536 __error: 2537 module_put(pcm->card->module); 2538 __error2: 2539 snd_card_file_remove(pcm->card, file); 2540 __error1: 2541 if (pcm) 2542 snd_card_unref(pcm->card); 2543 return err; 2544 } 2545 2546 static int snd_pcm_oss_release(struct inode *inode, struct file *file) 2547 { 2548 struct snd_pcm *pcm; 2549 struct snd_pcm_substream *substream; 2550 struct snd_pcm_oss_file *pcm_oss_file; 2551 2552 pcm_oss_file = file->private_data; 2553 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2554 if (substream == NULL) 2555 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2556 if (snd_BUG_ON(!substream)) 2557 return -ENXIO; 2558 pcm = substream->pcm; 2559 if (!pcm->card->shutdown) 2560 snd_pcm_oss_sync(pcm_oss_file); 2561 mutex_lock(&pcm->open_mutex); 2562 snd_pcm_oss_release_file(pcm_oss_file); 2563 mutex_unlock(&pcm->open_mutex); 2564 wake_up(&pcm->open_wait); 2565 module_put(pcm->card->module); 2566 snd_card_file_remove(pcm->card, file); 2567 return 0; 2568 } 2569 2570 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 2571 { 2572 struct snd_pcm_oss_file *pcm_oss_file; 2573 int __user *p = (int __user *)arg; 2574 int res; 2575 2576 pcm_oss_file = file->private_data; 2577 if (cmd == OSS_GETVERSION) 2578 return put_user(SNDRV_OSS_VERSION, p); 2579 if (cmd == OSS_ALSAEMULVER) 2580 return put_user(1, p); 2581 #if IS_REACHABLE(CONFIG_SND_MIXER_OSS) 2582 if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ 2583 struct snd_pcm_substream *substream; 2584 int idx; 2585 for (idx = 0; idx < 2; ++idx) { 2586 substream = pcm_oss_file->streams[idx]; 2587 if (substream != NULL) 2588 break; 2589 } 2590 if (snd_BUG_ON(idx >= 2)) 2591 return -ENXIO; 2592 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); 2593 } 2594 #endif 2595 if (((cmd >> 8) & 0xff) != 'P') 2596 return -EINVAL; 2597 #ifdef OSS_DEBUG 2598 pr_debug("pcm_oss: ioctl = 0x%x\n", cmd); 2599 #endif 2600 switch (cmd) { 2601 case SNDCTL_DSP_RESET: 2602 return snd_pcm_oss_reset(pcm_oss_file); 2603 case SNDCTL_DSP_SYNC: 2604 return snd_pcm_oss_sync(pcm_oss_file); 2605 case SNDCTL_DSP_SPEED: 2606 if (get_user(res, p)) 2607 return -EFAULT; 2608 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) 2609 return res; 2610 return put_user(res, p); 2611 case SOUND_PCM_READ_RATE: 2612 res = snd_pcm_oss_get_rate(pcm_oss_file); 2613 if (res < 0) 2614 return res; 2615 return put_user(res, p); 2616 case SNDCTL_DSP_STEREO: 2617 if (get_user(res, p)) 2618 return -EFAULT; 2619 res = res > 0 ? 2 : 1; 2620 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) 2621 return res; 2622 return put_user(--res, p); 2623 case SNDCTL_DSP_GETBLKSIZE: 2624 res = snd_pcm_oss_get_block_size(pcm_oss_file); 2625 if (res < 0) 2626 return res; 2627 return put_user(res, p); 2628 case SNDCTL_DSP_SETFMT: 2629 if (get_user(res, p)) 2630 return -EFAULT; 2631 res = snd_pcm_oss_set_format(pcm_oss_file, res); 2632 if (res < 0) 2633 return res; 2634 return put_user(res, p); 2635 case SOUND_PCM_READ_BITS: 2636 res = snd_pcm_oss_get_format(pcm_oss_file); 2637 if (res < 0) 2638 return res; 2639 return put_user(res, p); 2640 case SNDCTL_DSP_CHANNELS: 2641 if (get_user(res, p)) 2642 return -EFAULT; 2643 res = snd_pcm_oss_set_channels(pcm_oss_file, res); 2644 if (res < 0) 2645 return res; 2646 return put_user(res, p); 2647 case SOUND_PCM_READ_CHANNELS: 2648 res = snd_pcm_oss_get_channels(pcm_oss_file); 2649 if (res < 0) 2650 return res; 2651 return put_user(res, p); 2652 case SOUND_PCM_WRITE_FILTER: 2653 case SOUND_PCM_READ_FILTER: 2654 return -EIO; 2655 case SNDCTL_DSP_POST: 2656 return snd_pcm_oss_post(pcm_oss_file); 2657 case SNDCTL_DSP_SUBDIVIDE: 2658 if (get_user(res, p)) 2659 return -EFAULT; 2660 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); 2661 if (res < 0) 2662 return res; 2663 return put_user(res, p); 2664 case SNDCTL_DSP_SETFRAGMENT: 2665 if (get_user(res, p)) 2666 return -EFAULT; 2667 return snd_pcm_oss_set_fragment(pcm_oss_file, res); 2668 case SNDCTL_DSP_GETFMTS: 2669 res = snd_pcm_oss_get_formats(pcm_oss_file); 2670 if (res < 0) 2671 return res; 2672 return put_user(res, p); 2673 case SNDCTL_DSP_GETOSPACE: 2674 case SNDCTL_DSP_GETISPACE: 2675 return snd_pcm_oss_get_space(pcm_oss_file, 2676 cmd == SNDCTL_DSP_GETISPACE ? 2677 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2678 (struct audio_buf_info __user *) arg); 2679 case SNDCTL_DSP_NONBLOCK: 2680 return snd_pcm_oss_nonblock(file); 2681 case SNDCTL_DSP_GETCAPS: 2682 res = snd_pcm_oss_get_caps(pcm_oss_file); 2683 if (res < 0) 2684 return res; 2685 return put_user(res, p); 2686 case SNDCTL_DSP_GETTRIGGER: 2687 res = snd_pcm_oss_get_trigger(pcm_oss_file); 2688 if (res < 0) 2689 return res; 2690 return put_user(res, p); 2691 case SNDCTL_DSP_SETTRIGGER: 2692 if (get_user(res, p)) 2693 return -EFAULT; 2694 return snd_pcm_oss_set_trigger(pcm_oss_file, res); 2695 case SNDCTL_DSP_GETIPTR: 2696 case SNDCTL_DSP_GETOPTR: 2697 return snd_pcm_oss_get_ptr(pcm_oss_file, 2698 cmd == SNDCTL_DSP_GETIPTR ? 2699 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2700 (struct count_info __user *) arg); 2701 case SNDCTL_DSP_MAPINBUF: 2702 case SNDCTL_DSP_MAPOUTBUF: 2703 return snd_pcm_oss_get_mapbuf(pcm_oss_file, 2704 cmd == SNDCTL_DSP_MAPINBUF ? 2705 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, 2706 (struct buffmem_desc __user *) arg); 2707 case SNDCTL_DSP_SETSYNCRO: 2708 /* stop DMA now.. */ 2709 return 0; 2710 case SNDCTL_DSP_SETDUPLEX: 2711 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) 2712 return 0; 2713 return -EIO; 2714 case SNDCTL_DSP_GETODELAY: 2715 res = snd_pcm_oss_get_odelay(pcm_oss_file); 2716 if (res < 0) { 2717 /* it's for sure, some broken apps don't check for error codes */ 2718 put_user(0, p); 2719 return res; 2720 } 2721 return put_user(res, p); 2722 case SNDCTL_DSP_PROFILE: 2723 return 0; /* silently ignore */ 2724 default: 2725 pr_debug("pcm_oss: unknown command = 0x%x\n", cmd); 2726 } 2727 return -EINVAL; 2728 } 2729 2730 #ifdef CONFIG_COMPAT 2731 /* all compatible */ 2732 static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd, 2733 unsigned long arg) 2734 { 2735 return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2736 } 2737 #else 2738 #define snd_pcm_oss_ioctl_compat NULL 2739 #endif 2740 2741 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) 2742 { 2743 struct snd_pcm_oss_file *pcm_oss_file; 2744 struct snd_pcm_substream *substream; 2745 2746 pcm_oss_file = file->private_data; 2747 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2748 if (substream == NULL) 2749 return -ENXIO; 2750 substream->f_flags = file->f_flags & O_NONBLOCK; 2751 #ifndef OSS_DEBUG 2752 return snd_pcm_oss_read1(substream, buf, count); 2753 #else 2754 { 2755 ssize_t res = snd_pcm_oss_read1(substream, buf, count); 2756 pcm_dbg(substream->pcm, 2757 "pcm_oss: read %li bytes (returned %li bytes)\n", 2758 (long)count, (long)res); 2759 return res; 2760 } 2761 #endif 2762 } 2763 2764 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) 2765 { 2766 struct snd_pcm_oss_file *pcm_oss_file; 2767 struct snd_pcm_substream *substream; 2768 long result; 2769 2770 pcm_oss_file = file->private_data; 2771 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2772 if (substream == NULL) 2773 return -ENXIO; 2774 substream->f_flags = file->f_flags & O_NONBLOCK; 2775 result = snd_pcm_oss_write1(substream, buf, count); 2776 #ifdef OSS_DEBUG 2777 pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n", 2778 (long)count, (long)result); 2779 #endif 2780 return result; 2781 } 2782 2783 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream) 2784 { 2785 struct snd_pcm_runtime *runtime = substream->runtime; 2786 if (atomic_read(&substream->mmap_count)) 2787 return runtime->oss.prev_hw_ptr_period != 2788 get_hw_ptr_period(runtime); 2789 else 2790 return snd_pcm_playback_avail(runtime) >= 2791 runtime->oss.period_frames; 2792 } 2793 2794 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream) 2795 { 2796 struct snd_pcm_runtime *runtime = substream->runtime; 2797 if (atomic_read(&substream->mmap_count)) 2798 return runtime->oss.prev_hw_ptr_period != 2799 get_hw_ptr_period(runtime); 2800 else 2801 return snd_pcm_capture_avail(runtime) >= 2802 runtime->oss.period_frames; 2803 } 2804 2805 static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait) 2806 { 2807 struct snd_pcm_oss_file *pcm_oss_file; 2808 __poll_t mask; 2809 struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL; 2810 2811 pcm_oss_file = file->private_data; 2812 2813 psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2814 csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2815 2816 mask = 0; 2817 if (psubstream != NULL) { 2818 struct snd_pcm_runtime *runtime = psubstream->runtime; 2819 poll_wait(file, &runtime->sleep, wait); 2820 snd_pcm_stream_lock_irq(psubstream); 2821 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && 2822 (runtime->status->state != SNDRV_PCM_STATE_RUNNING || 2823 snd_pcm_oss_playback_ready(psubstream))) 2824 mask |= EPOLLOUT | EPOLLWRNORM; 2825 snd_pcm_stream_unlock_irq(psubstream); 2826 } 2827 if (csubstream != NULL) { 2828 struct snd_pcm_runtime *runtime = csubstream->runtime; 2829 snd_pcm_state_t ostate; 2830 poll_wait(file, &runtime->sleep, wait); 2831 snd_pcm_stream_lock_irq(csubstream); 2832 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || 2833 snd_pcm_oss_capture_ready(csubstream)) 2834 mask |= EPOLLIN | EPOLLRDNORM; 2835 snd_pcm_stream_unlock_irq(csubstream); 2836 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { 2837 struct snd_pcm_oss_file ofile; 2838 memset(&ofile, 0, sizeof(ofile)); 2839 ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2840 runtime->oss.trigger = 0; 2841 snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); 2842 } 2843 } 2844 2845 return mask; 2846 } 2847 2848 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) 2849 { 2850 struct snd_pcm_oss_file *pcm_oss_file; 2851 struct snd_pcm_substream *substream = NULL; 2852 struct snd_pcm_runtime *runtime; 2853 int err; 2854 2855 #ifdef OSS_DEBUG 2856 pr_debug("pcm_oss: mmap begin\n"); 2857 #endif 2858 pcm_oss_file = file->private_data; 2859 switch ((area->vm_flags & (VM_READ | VM_WRITE))) { 2860 case VM_READ | VM_WRITE: 2861 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2862 if (substream) 2863 break; 2864 /* Fall through */ 2865 case VM_READ: 2866 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; 2867 break; 2868 case VM_WRITE: 2869 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; 2870 break; 2871 default: 2872 return -EINVAL; 2873 } 2874 /* set VM_READ access as well to fix memset() routines that do 2875 reads before writes (to improve performance) */ 2876 area->vm_flags |= VM_READ; 2877 if (substream == NULL) 2878 return -ENXIO; 2879 runtime = substream->runtime; 2880 if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) 2881 return -EIO; 2882 if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) 2883 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; 2884 else 2885 return -EIO; 2886 2887 if (runtime->oss.params) { 2888 /* use mutex_trylock() for params_lock for avoiding a deadlock 2889 * between mmap_sem and params_lock taken by 2890 * copy_from/to_user() in snd_pcm_oss_write/read() 2891 */ 2892 err = snd_pcm_oss_change_params(substream, true); 2893 if (err < 0) 2894 return err; 2895 } 2896 #ifdef CONFIG_SND_PCM_OSS_PLUGINS 2897 if (runtime->oss.plugin_first != NULL) 2898 return -EIO; 2899 #endif 2900 2901 if (area->vm_pgoff != 0) 2902 return -EINVAL; 2903 2904 err = snd_pcm_mmap_data(substream, file, area); 2905 if (err < 0) 2906 return err; 2907 runtime->oss.mmap_bytes = area->vm_end - area->vm_start; 2908 runtime->silence_threshold = 0; 2909 runtime->silence_size = 0; 2910 #ifdef OSS_DEBUG 2911 pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n", 2912 runtime->oss.mmap_bytes); 2913 #endif 2914 /* In mmap mode we never stop */ 2915 runtime->stop_threshold = runtime->boundary; 2916 2917 return 0; 2918 } 2919 2920 #ifdef CONFIG_SND_VERBOSE_PROCFS 2921 /* 2922 * /proc interface 2923 */ 2924 2925 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry, 2926 struct snd_info_buffer *buffer) 2927 { 2928 struct snd_pcm_str *pstr = entry->private_data; 2929 struct snd_pcm_oss_setup *setup = pstr->oss.setup_list; 2930 mutex_lock(&pstr->oss.setup_mutex); 2931 while (setup) { 2932 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", 2933 setup->task_name, 2934 setup->periods, 2935 setup->period_size, 2936 setup->disable ? " disable" : "", 2937 setup->direct ? " direct" : "", 2938 setup->block ? " block" : "", 2939 setup->nonblock ? " non-block" : "", 2940 setup->partialfrag ? " partial-frag" : "", 2941 setup->nosilence ? " no-silence" : ""); 2942 setup = setup->next; 2943 } 2944 mutex_unlock(&pstr->oss.setup_mutex); 2945 } 2946 2947 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr) 2948 { 2949 struct snd_pcm_oss_setup *setup, *setupn; 2950 2951 for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; 2952 setup; setup = setupn) { 2953 setupn = setup->next; 2954 kfree(setup->task_name); 2955 kfree(setup); 2956 } 2957 pstr->oss.setup_list = NULL; 2958 } 2959 2960 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry, 2961 struct snd_info_buffer *buffer) 2962 { 2963 struct snd_pcm_str *pstr = entry->private_data; 2964 char line[128], str[32], task_name[32]; 2965 const char *ptr; 2966 int idx1; 2967 struct snd_pcm_oss_setup *setup, *setup1, template; 2968 2969 while (!snd_info_get_line(buffer, line, sizeof(line))) { 2970 mutex_lock(&pstr->oss.setup_mutex); 2971 memset(&template, 0, sizeof(template)); 2972 ptr = snd_info_get_str(task_name, line, sizeof(task_name)); 2973 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { 2974 snd_pcm_oss_proc_free_setup_list(pstr); 2975 mutex_unlock(&pstr->oss.setup_mutex); 2976 continue; 2977 } 2978 for (setup = pstr->oss.setup_list; setup; setup = setup->next) { 2979 if (!strcmp(setup->task_name, task_name)) { 2980 template = *setup; 2981 break; 2982 } 2983 } 2984 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2985 template.periods = simple_strtoul(str, NULL, 10); 2986 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2987 template.period_size = simple_strtoul(str, NULL, 10); 2988 for (idx1 = 31; idx1 >= 0; idx1--) 2989 if (template.period_size & (1 << idx1)) 2990 break; 2991 for (idx1--; idx1 >= 0; idx1--) 2992 template.period_size &= ~(1 << idx1); 2993 do { 2994 ptr = snd_info_get_str(str, ptr, sizeof(str)); 2995 if (!strcmp(str, "disable")) { 2996 template.disable = 1; 2997 } else if (!strcmp(str, "direct")) { 2998 template.direct = 1; 2999 } else if (!strcmp(str, "block")) { 3000 template.block = 1; 3001 } else if (!strcmp(str, "non-block")) { 3002 template.nonblock = 1; 3003 } else if (!strcmp(str, "partial-frag")) { 3004 template.partialfrag = 1; 3005 } else if (!strcmp(str, "no-silence")) { 3006 template.nosilence = 1; 3007 } else if (!strcmp(str, "buggy-ptr")) { 3008 template.buggyptr = 1; 3009 } 3010 } while (*str); 3011 if (setup == NULL) { 3012 setup = kmalloc(sizeof(*setup), GFP_KERNEL); 3013 if (! setup) { 3014 buffer->error = -ENOMEM; 3015 mutex_unlock(&pstr->oss.setup_mutex); 3016 return; 3017 } 3018 if (pstr->oss.setup_list == NULL) 3019 pstr->oss.setup_list = setup; 3020 else { 3021 for (setup1 = pstr->oss.setup_list; 3022 setup1->next; setup1 = setup1->next); 3023 setup1->next = setup; 3024 } 3025 template.task_name = kstrdup(task_name, GFP_KERNEL); 3026 if (! template.task_name) { 3027 kfree(setup); 3028 buffer->error = -ENOMEM; 3029 mutex_unlock(&pstr->oss.setup_mutex); 3030 return; 3031 } 3032 } 3033 *setup = template; 3034 mutex_unlock(&pstr->oss.setup_mutex); 3035 } 3036 } 3037 3038 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm) 3039 { 3040 int stream; 3041 for (stream = 0; stream < 2; ++stream) { 3042 struct snd_info_entry *entry; 3043 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3044 if (pstr->substream_count == 0) 3045 continue; 3046 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { 3047 entry->content = SNDRV_INFO_CONTENT_TEXT; 3048 entry->mode = S_IFREG | 0644; 3049 entry->c.text.read = snd_pcm_oss_proc_read; 3050 entry->c.text.write = snd_pcm_oss_proc_write; 3051 entry->private_data = pstr; 3052 if (snd_info_register(entry) < 0) { 3053 snd_info_free_entry(entry); 3054 entry = NULL; 3055 } 3056 } 3057 pstr->oss.proc_entry = entry; 3058 } 3059 } 3060 3061 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm) 3062 { 3063 int stream; 3064 for (stream = 0; stream < 2; ++stream) { 3065 struct snd_pcm_str *pstr = &pcm->streams[stream]; 3066 snd_info_free_entry(pstr->oss.proc_entry); 3067 pstr->oss.proc_entry = NULL; 3068 snd_pcm_oss_proc_free_setup_list(pstr); 3069 } 3070 } 3071 #else /* !CONFIG_SND_VERBOSE_PROCFS */ 3072 #define snd_pcm_oss_proc_init(pcm) 3073 #define snd_pcm_oss_proc_done(pcm) 3074 #endif /* CONFIG_SND_VERBOSE_PROCFS */ 3075 3076 /* 3077 * ENTRY functions 3078 */ 3079 3080 static const struct file_operations snd_pcm_oss_f_reg = 3081 { 3082 .owner = THIS_MODULE, 3083 .read = snd_pcm_oss_read, 3084 .write = snd_pcm_oss_write, 3085 .open = snd_pcm_oss_open, 3086 .release = snd_pcm_oss_release, 3087 .llseek = no_llseek, 3088 .poll = snd_pcm_oss_poll, 3089 .unlocked_ioctl = snd_pcm_oss_ioctl, 3090 .compat_ioctl = snd_pcm_oss_ioctl_compat, 3091 .mmap = snd_pcm_oss_mmap, 3092 }; 3093 3094 static void register_oss_dsp(struct snd_pcm *pcm, int index) 3095 { 3096 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3097 pcm->card, index, &snd_pcm_oss_f_reg, 3098 pcm) < 0) { 3099 pcm_err(pcm, "unable to register OSS PCM device %i:%i\n", 3100 pcm->card->number, pcm->device); 3101 } 3102 } 3103 3104 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm) 3105 { 3106 pcm->oss.reg = 0; 3107 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3108 char name[128]; 3109 int duplex; 3110 register_oss_dsp(pcm, 0); 3111 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 3112 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 3113 !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); 3114 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); 3115 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3116 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, 3117 pcm->card->number, 3118 name); 3119 #endif 3120 pcm->oss.reg++; 3121 pcm->oss.reg_mask |= 1; 3122 } 3123 if (adsp_map[pcm->card->number] == (int)pcm->device) { 3124 register_oss_dsp(pcm, 1); 3125 pcm->oss.reg++; 3126 pcm->oss.reg_mask |= 2; 3127 } 3128 3129 if (pcm->oss.reg) 3130 snd_pcm_oss_proc_init(pcm); 3131 3132 return 0; 3133 } 3134 3135 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm) 3136 { 3137 if (pcm->oss.reg) { 3138 if (pcm->oss.reg_mask & 1) { 3139 pcm->oss.reg_mask &= ~1; 3140 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3141 pcm->card, 0); 3142 } 3143 if (pcm->oss.reg_mask & 2) { 3144 pcm->oss.reg_mask &= ~2; 3145 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, 3146 pcm->card, 1); 3147 } 3148 if (dsp_map[pcm->card->number] == (int)pcm->device) { 3149 #ifdef SNDRV_OSS_INFO_DEV_AUDIO 3150 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); 3151 #endif 3152 } 3153 pcm->oss.reg = 0; 3154 } 3155 return 0; 3156 } 3157 3158 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm) 3159 { 3160 snd_pcm_oss_disconnect_minor(pcm); 3161 snd_pcm_oss_proc_done(pcm); 3162 return 0; 3163 } 3164 3165 static struct snd_pcm_notify snd_pcm_oss_notify = 3166 { 3167 .n_register = snd_pcm_oss_register_minor, 3168 .n_disconnect = snd_pcm_oss_disconnect_minor, 3169 .n_unregister = snd_pcm_oss_unregister_minor, 3170 }; 3171 3172 static int __init alsa_pcm_oss_init(void) 3173 { 3174 int i; 3175 int err; 3176 3177 /* check device map table */ 3178 for (i = 0; i < SNDRV_CARDS; i++) { 3179 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { 3180 pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n", 3181 i, dsp_map[i]); 3182 dsp_map[i] = 0; 3183 } 3184 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { 3185 pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n", 3186 i, adsp_map[i]); 3187 adsp_map[i] = 1; 3188 } 3189 } 3190 if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) 3191 return err; 3192 return 0; 3193 } 3194 3195 static void __exit alsa_pcm_oss_exit(void) 3196 { 3197 snd_pcm_notify(&snd_pcm_oss_notify, 1); 3198 } 3199 3200 module_init(alsa_pcm_oss_init) 3201 module_exit(alsa_pcm_oss_exit) 3202